With the progress of social and economic development, people's demand for resources continues to increase, from automobiles that require diesel to power plants that require petroleum. In short, oil, natural gas and other resources have become indispensable things in people's daily life, so people gradually invented pipeline transportation methods. Next, I will introduce pipeline construction equipment in detail.
Here is the content list:
l What are the reasons for using pipeline construction equipment
l What is the specific process of pipeline construction
l What pipeline construction equipment is needed during pipeline construction
Due to the large volume of pipeline transportation, most of the pipelines are buried underground, occupying a small area, less terrain and object constraints, and short transportation distances.
Use pipeline construction equipment for sealed transportation, safe and reliable, long-term continuous and stable operation, easy to manage, easy to maintain, and realize remote centralized monitoring.
Therefore, a large number of pipeline laying work has been carried out in various countries, and related companies specializing in pipeline construction equipment have been derived. WINCOO is a company specializing in pipeline construction equipment.
There are many factors that can lead to operational defects in pipeline construction, such as inadequate installation technology, long construction period or insufficient supervision. Relevant technical personnel should be careful, careful, and concentrate on research and judgment when inspecting and accepting pipeline construction equipment.
Provide feedback and resolve the issue as quickly as possible. If the existing safety quality is not reached, the target area should be immediately compensated to ensure that the pipeline construction equipment can continue to operate safely. And maintain the original economic cost.
Specific process introduction:
Measuring arrangement→cleaning the construction work area; construction road→conveying anticorrosion pipe→processing tank→distributing pipe→preparing nozzle; pipeline assembly→pipe assembly and welding→welding joint inspection→heat shrinkable casing (tape) bushing→ trench excavation →Appearance repair.
The following pipeline construction equipment is needed during pipeline construction:
l Transport anticorrosive pipe
l Pipe assembly
l Pipe assembly and welding
l Heat shrinkable sleeve (tape) bushing
With the continuous development of society, the demand for pipelines is also increasing, and the pressure on pipelines is increasing. During the installation and operation of pipeline construction equipment, welding is a basic technical job and also a vital job.
The safe and stable operation of pipeline construction equipment plays a key role in the overall pipeline operation. Therefore, increasing attention to the construction quality of pipeline construction equipment can lay a solid foundation for the normal operation of the factory!If you want to know more about high-quality pipe spool fabrication lines, you can also contact us at any time.
In recent years, large-scale pipeline projects have started one after another, and the level of mechanical equipment of pipeline construction solutions has been steadily improved. However, the management of pipeline construction equipment on the construction site has not kept up with the speed of pipeline engineering and mechanical equipment updates, resulting in a high rate of equipment failure and maintenance on the construction site. High cost, low technical performance and low utilization rate. In response to these situations, explore standardized maintenance in the management of pipeline construction equipment.
Here is the content list:
l Regarding the maintenance status of pipeline construction equipment at the construction site.
l What are the specific measures to achieve standardized maintenance of pipeline construction equipment?
l How can companies ensure the effective implementation of pipeline construction equipment maintenance procedures?
l Objective conditions cause pipeline construction equipment maintenance to be unable to be carried out normally. Pipeline construction has a large geographic span, harsh construction environment, and increased equipment component wear, which directly affects the stability and reliability of the equipment, causing the mechanical equipment to lose basic performance and fail to operate normally. In addition, the current project schedule is very tight. In order to catch up with the schedule and grab the schedule, it is difficult to keep up with the daily maintenance of pipeline construction equipment.
l Subjectively neglect.The subjective factor that causes the on-site pipeline construction equipment maintenance to be unable to be carried out normally is that the relevant units and management personnel do not pay attention to the equipment management. In many construction companies, the management of the company, project management, and construction crews do not pay much attention to the management of pipeline construction equipment, believing that the equipment is just a tool for wear and tear during the construction process, which emphasizes use rather than maintenance. Many construction projects and construction units arbitrarily extend the maintenance cycle of pipeline construction equipment, reduce the grade of accessories and lubricants, so that the overhaul cycle of the engine is shortened due to human factors, project maintenance costs increase, and the cycle of equipment failures is prolonged. The technical performance of pipeline construction equipment has severely declined.
l Weak technical management capabilities.The quality of equipment maintenance has declined. First of all, many on-site management personnel's understanding of on-site maintenance of pipeline construction equipment is still at the level of "replacement of the three oil filters", and the maintenance of the engine, chassis and working devices is not included in the pipeline construction equipment. Maintenance plan in progress. Secondly, the equipment operators and maintenance personnel do not have a high level of basic skills and cannot complete the overall overhaul of pipeline construction equipment with high quality.
Repair and maintenance of pipeline construction equipmentt is very important. First of all, we must regularly check, maintain and replace vulnerable parts. WINCOO will provide manuals with the machine, such as high-performance pipeline construction equipment, automatic pipeline construction equipment, small pipeline construction equipment, high-precision pipeline construction equipment, easy-to-maintain pipeline construction equipment, etc. The following are specific measures:
① In view of the low maintenance quality of pipeline construction equipment, by compiling comprehensive, meticulous, and highly operable procedures, not only can we clarify what tasks the pipeline construction equipment operators and maintenance personnel need to do daily maintenance and secondary maintenance, but also tell them How to work.
② While compiling maintenance procedures for pipeline construction equipment, the company also compiled checklists for standardized maintenance and management of various types of pipeline construction equipment, making it the main basis for management departments at all levels to inspect pipeline construction equipment, and unify inspection standards and assessment scores. Standards to facilitate the recording, filing and review of equipment inspections and inspection results.
① Personnel training. Strengthen the learning and training of pipeline construction equipment supervisors,managers, and maintenance personnel to change their concepts, fully understand the importance of maintenance to the use of equipment, and cultivate long-term perspectives and implementation of pipeline construction equipment maintenance, and completely avoid the first phase The situation where the project "eaten" a batch of pipeline construction equipment. Through regular learning and training, the standardized equipment maintenance procedures are deeply rooted in the hearts of the people, and become the working guidelines and working habits of operators and repairers, rather than the work requirements of the superior management department. Through learning and training, to a certain extent, the sense of responsibility and dedication of managers at all levels has also been improved.
② Innovate the system of deciding people and machines. In order to mobilize the enthusiasm of equipment operators to rationally use pipeline construction equipment, earnestly maintain pipeline construction equipment, and sincerely care for pipeline construction equipment, the company strictly implements the system of determining personnel and equipment, and integrates the personnel and equipment management information system to control the attendance and equipment of the operators. The intactness of the pipeline construction equipment is linked together, and the man-hours for equipment maintenance are included in the actual man-hours of the operator.
① Increase the intensity of rewards and punishments for pipeline construction equipment inspection. In order to ensure the implementation of the standardization of pipeline construction equipment on-site maintenance, the company pays special attention to the intensity of inspection rewards and punishments for pipeline construction equipment when revising the management system.
② Link the maintenance of pipeline construction equipment with bonuses. In order to motivate the construction unit to use and maintain the pipeline construction equipment, the project department regards equipment maintenance as an important assessment index when formulating the economic responsibility system assessment, guiding the construction unit to use the maintenance pipeline construction equipment rationally, controlling the construction progress and avoiding the problem to the greatest extent.
In order to ensure that pipeline construction equipment maintenance procedures can be effectively implemented, the company has formulated corresponding management systems and adopted specific measures to supervise the implementation of these systems.
l Divide maintenance responsibilities. In the management system, the corresponding responsibilities of equipment operators, pipeline construction equipment maintenance personnel, unit equipment managers, and project pipeline construction equipment managers are clarified, and these responsibilities are written into the maintenance procedures manual of each type of equipment, so that all levels of pipeline construction equipment Managers can see what they should do every day and how to record their work in the maintenance procedures.
l Promote standardized pipeline construction equipment maintenance procedures. Implement standardized equipment maintenance organization processes in each construction project to ensure smooth equipment maintenance channels and optimize the maintenance force of the entire project.
l Establish a professional maintenance team. The project department mobilizes skilled fitters, electricians, and repairers to form a professional maintenance team, which is conducive to the unified scheduling of maintenance forces for the project, and ensures low failure rate and high utilization of pipeline construction equipment.
What is more? WINCOO provide not only pipeline construction solutions, but also pipe spool fabrication solutions for customers from everywhere!
The use of pipeline construction equipment is inevitable in the chemical industry. Pipeline installation is an inevitable part of project construction. However, the installation of pipeline construction equipment requires a certain degree of professionalism and pertinence. Relevant departments need to strengthen industrial management and do a good job of quality control of pipeline installation , Lay a solid foundation for my country's industrial development.
Here is the content list:
l Introduce the basic information of pipeline construction equipment.
l Introduce the safety and environmental protection measures of pipeline construction equipment.
l Introduce the influencing factors in the installation of pipeline construction equipment.
Introduce the basic information of pipeline construction equipment.
l Main material
Q345 steel plate, submerged arc welding wire, electric welding rod, two protection welding wire, CO2 gas, oxygen, acetylene gas, carbon rod.
l Machines and equipment
Electronic goniometer, steel tape measure, weld ruler, square ruler, non-destructive flaw detector, multi-head automatic cutting.Machine, assembly machine, DC arc welding machine, automatic submerged arc welding machine, CO2 gas shielded welding machine, creasing machine, radial drilling machine, radial drilling machine, planer, medium-sized oven.
l Quality Control
In accordance with the construction quality management system of pipeline construction equipment, establish quality acceptance standards for finished components of processing plants. Prepare the corresponding technical plan before processing, organize the management and operation personnel involved in processing to carry out training, so that the relevant operators can fundamentally solve the problems existing in the process of processing pipeline construction equipment.
Introduce the safety and environmental protection measures of pipeline construction equipment.
The use of pipeline construction equipment can effectively guarantee the processing quality of steel crane beams, reduce the amount of correction work, reduce production costs, speed up the production rate, and reduce the adverse effects on the welds caused by measures such as the fixed and mandatory correction of semi-finished products during the processing , It has a positive effect on the improvement of the processing technology of steel crane beams.
l Safety measures
Before making steel crane beams, a processing plan or processing technology should be prepared, corresponding safety technical guarantee measures should be formulated, and safety technical clarifications should be made.
① Operators must be familiar with the safety operating procedures of machinery and equipment in the production of pipeline construction equipment and the safety technical operating procedures of this type of work, and operate in strict accordance with the procedures for safe operations.
② The electricity consumption of the production workshop or site must be managed by a full-time electrician and hold a certificate.
③ The electric oxygen welder must obtain the corresponding electric welder qualification certificate.
④ Materials, semi-finished products, and finished products should be slowly and steadily lifted during production, turning over, and lifting.
⑤ Place it to prevent bumping or falling over and crushing people. Lifting personnel must have corresponding qualifications.
⑥ All workers wear protective equipment as required.
⑦ All kinds of pipeline construction equipment must have good grounding and zero connection.
⑧ Establish a full-time safety officer to conduct safety inspections and inspections on the work site, and find unsafe factors, promptly propose and implement corrective measures.
l Environmental protection measures
The installation of pipeline construction equipment is one of the necessary steps in the industrial field, and the installation and construction of pipeline construction equipment is a very important stage in project construction.
Due to the influence of various factors during project construction, there are many problems in the installation of pipeline construction equipment. In order to promote the improvement of industrial pipeline installation quality, certain measures need to be taken to control the pipeline installation quality to ensure the smooth completion of project construction.
① The construction site should be kept clean. All items should be arranged in time and placed in an orderly manner.
② Noise should be controlled during operation, and operation time should be arranged reasonably to reduce the impact on the surrounding environment.
③ The working lights at night should be irradiated into the field, and protective measures should be taken for the welding arc.
④ The oil used in operation machinery shall not be dumped at will to prevent pollution.
⑤ Waste materials, steel materials, welding heads, welding wire heads, etc. left over during operation should be collected separately, treated or recycled in a unified manner.
Introduce the influencing factors in the installation of pipeline construction equipment.
l Bracket installation quality
In the installation of pipeline construction equipment, the installation of the bracket is relatively important, which plays a very good role in the quality of pipeline installation and the normal operation of the equipment. Among them, the installation of the bracket has a certain impact on the overall performance of the pipeline.
For example, the carrying capacity of the scaffold must meet the standard, the sliding surface of the support and the supporting surface have good connection performance, etc. Therefore, the pipeline construction process needs to be carried out according to the engineering construction drawings and pipeline construction equipment installation and construction process specifications to avoid installation Quality has a certain impact.
l Welding quality
Welding in the installation of pipeline construction equipment is also one of the necessary links. The quality of welding affects the overall quality of pipeline installation. Pipe welding can ensure the performance of the undertaking project frame group, thereby ensuring the overall performance of the pipeline. Therefore, precise welding is required in welding, positioning welding position to ensure welding quality, and welding in strict compliance with welding procedures and specifications.
In welding, especially the position of the welding seam, the welding process requirements of the welding workers are very high. The relevant personnel are required to do a good job in welding quality control in this link, and to formulate specific solutions for possible situations to avoid The overall performance of pipeline construction equipment has a certain impact.
l Pipeline anticorrosion
The particularity of the use environment of pipeline construction equipment and the particularity of the use location require the pipeline to have certain anti-corrosion performance. In the pipeline anti-corrosion, the anti-corrosion material will choose paint, and the economical and reasonable pipeline paint can be selected for pipeline anti-corrosion in the process of use.
To reduce the risk of pipeline construction equipment being corroded, paint itself is a corrosion-resistant substance, which is an industrial raw material and anti-rust material for construction. Applying a layer of paint on the surface of the pipeline can extend the service life of the pipeline.
Pipeline construction equipment plays a very important role in the development and exploration of oil and gas resources. To ensure the production safety of oilfield enterprises, it is necessary to improve the quality of surface pipeline construction equipment installation and gathering pipeline construction. Next, it mainly elaborates the relevant installation points of pipeline construction equipment, analyzes and introduces the construction technology of pipeline construction equipment, and lays a solid foundation for the development of oilfield surface construction.
Here is the content list:
l Regarding the necessity of installing pipeline construction equipment.
l About the procurement and acceptance of pipeline construction equipment.
l What are the main points of pipeline construction equipment installation?
Ground construction is an important link in the pipeline development and exploration process and a key means to ensure the production safety of pipeline engineering, especially the installation of pipeline construction equipment and gathering pipeline construction technology, which plays an important role.
Production safety is closely related to the installation quality of pipeline construction equipment. At the same time, the transportation of resources has a direct impact on the construction technology of gathering pipelines. Therefore, only the continuous improvement of pipeline construction equipment installation and gathering pipeline construction technology can promote the development of resources and sustainable development.
With the continuous development and progress of my country's science and technology, my country's demand for oil and gas resources has become greater and greater. In order to promote the development of my country's economic construction and meet people's normal lives, it is necessary to strengthen management of the construction of pipeline construction equipment.
Through our analysis, it is found that the quality of products and product life of a company is closely related to the installation quality of pipeline construction equipment. Therefore, during the installation of pipeline construction equipment, the quality of pipeline construction equipment must be checked, especially the key to the equipment. Comprehensive corrosion control.
In the process of purchasing technical parts, the model, quantity, type, specifications, etc. must be carefully checked, and must comply with relevant national and corporate standards. When purchasing, try to directly sign contracts with purchasing companies to control procurement costs and ensure product quality.
Therefore, the pipeline construction equipment must meet the actual construction requirements when purchasing, and the quality of the pipeline construction equipment must be strictly controlled and accepted after entering the site. Only after all the inspections are qualified, the pipeline construction equipment can be installed on the site to ensure Safe use of equipment during construction!
During the installation of pipeline construction equipment, professional installers must perform operations. Installers must first inspect the installation site, work out a scientific and reasonable construction plan, and choose the correct installation method.
Measured according to the positioning axis of pipeline construction equipment. At present, there are two equipment installation methods that are often used in ground construction. One is to directly install on an existing building; the other is to conduct strict and precise measurement on the location of the equipment.
Check the balance error, vertical error, dimensional error, and axis error of key components in pipeline construction equipment one by one. At the same time, if you want to closely link the ground construction equipment with the construction base, you must strictly control the grouting quality of the grouting layer, and further strengthen the strength of the grouting layer. After the installation of the pipeline construction equipmentt, the safety of use must be carried out. Detect and avoid equipment failure during use, causing safety accidents, and bringing huge economic losses to the enterprise.
The pipe spool fabrication line has unique structure, high degree of automation, convenient operation, stable and reliable continuous production. The pipes produced by this pipe spool fabrication line have moderate rigidity, strength, good flexibility, creep resistance, environmental stress cracking resistance and good thermal welding performance, and have become the first choice for urban gas pipelines and outdoor water supply pipes. However, there are still some problems when using the pipe spool fabrication line.
Here is the content list:
l Failure of the production line and corresponding measures.
l Computer system failure and corresponding measures.
l Pipe spool fabrication line failure and corresponding measures.
l The outer surface of the pipe spool fabrication line is rough
① Adjust the pipe spool fabrication line of process temperature: reduce the cooling water temperature, the best cooling water temperature of the PE pipe is 20~25℃
② Check whether the waterway is blocked or the water pressure is insufficient;
③ Check whether the heating ring of the barrel, head, etc. is damaged;
④ Adjust the water flow of the sizing sleeve;
⑤ Please consult the raw material supplier for the raw material parameters of the batch;
⑥ Check the mold core temperature, if it is higher than the die temperature, reduce the mold core temperature;
⑦ Clean the mold;
l Grooves appear on the outer surface of the plastic pipe
① Adjust the water outlet pressure of the sizing sleeve, and balance the water output;
② Adjust the nozzle angle in the vacuum forming box to evenly cool the pipeline;
③ Check the mold, sizing sleeve, cutting machine and other hardware for debris and burrs;
l There is a jitter ring inside the pipe spool fabrication line
① Adjust the water outlet of the sizing sleeve to make it even.
② Adjust the vacuum degree of the second chamber so that the vacuum degree of the rear chamber is slightly higher than that of the front chamber;
③ Check whether the vacuum seal is too tight;
④ Check whether the tractor is shaking;
⑤ Check whether the host output is even;
l The outer diameter of the pipe spool fabrication line is out of tolerance
① Adjust the vacuum to change the size of the outer circle;
② Adjust the traction speed to change the outer ring size;
③ Correct the size of the inner hole of the sizing sleeve;
l Uneven wall thickness of pipe spool fabrication line
① Adjust the wall thickness of the mold; adjust the nozzle angle in the vacuum setting machine and spray box to uniformly cool the pipeline.
② Adjust the water outlet of the sizing sleeve to make it even.
③ Disassemble the mold, check whether the screws in the mold are loose, and then tighten it again;
Computer system failure
When the computer is turned on or running, pipe spool fabrication line is not allowed to enter the test state.
l Problem 1: The tensile strength and toughness are poor. The tensile strength curve of pipe spool fabrication line should have obvious yield strength and greater elongation, while poor plastic pipes are usually fragile, low elongation and easy to break.
l Problem 2: Poor impact resistance. According to the GB/T5836.1-92 standard, the drop hammer impact test was tested. After years of testing, it was found that the pass rate was only less than 50%, and many pipe spool fabrication line were even damaged by 10 times.
l Problem 3: The softening temperature is low and it is easy to deform after being heated. It is shown in the test performance, that is, the Vicat softening temperature is relatively low (less than 79). Some manufacturers only increase the amount of filler during the compounding process to increase the softening temperature.
This can indeed increase the softening temperature, but will greatly reduce the other properties of the pipe, especially impact resistance, tensile strength and toughness. Therefore, in order to increase the softening temperature without reducing or seldom reducing other properties, attention must be paid to the selection of additives, the ratio of raw materials, the production process and the production machinery, Can not be taken lightly.
Pipe spool fabrication line is tested in accordance with the national standard GB/T10002.1-1996, and its hydraulic inspection performance standard value requirements are relatively high, which puts forward high requirements for enterprises that produce pipe spool fabrication line. The eccentricity problem is one of the common plastic pipe problems, which will result in large uneven wall thickness of the produced plastic pipes, which not only causes waste of raw materials, but also makes it difficult for the water pressure test performance to meet the requirements.
The operation of the pipe spool fabrication line has a great impact. Therefore, this requires manufacturers not only to match the materials well, but also to install online testing equipment so that qualified companies can adjust the size deviation of the plastic pipe at any time.
Hydraulic jacking system is an important machine for tank construction. The equipment is mainly used for inverted construction of vertical cylindrical steel tank (hydraulic lifting method) in petrochemical industry, inverted construction of steel liner in power plant chimney and inverted construction of vertical cylindrical low temperature tank. I will give you a detailed introduction of the hydraulic jacking system.
What are the characteristics and applications of hydraulic jacking system?
What are the types of hydraulic jacking system?
What is the working principle of hydraulic jacking system?
What are the construction steps of hydraulic jacking system?
1.The hydraulic jacking system are mainly used for vertical tank top to bottom construction.
2.Also it can be used for mega work piece jacking or lifting.
1.The system consists of hydraulic pump station, cylinders, steel wire, and strokes. Easy to installation and operation;
2.The system utilizes PLC central control to handle lift. Each power pack is equipped with auxiliary balance device to guarantee the precision of simultaneously lifting.
3.Hydraulic jacking system pump station has subsidiary manual control and central control two operation models. The cylinder can be adjusted to lift separately or to lift with several others as one group, and multi groups can also be integrated to lift reach better precision and better welding effect.
4.All the cylinders are with safety valve. It can be automatically locked to avoid cylinder/ tank dropping even under situation of power off, high-pressure hose broken, burst.
5.The cylinder is with one high pressure hose to avoid oil leaking that usually happen by the traditional multiple hoses. Cylinder will return to initial condition by itself weight.
6.Stroke of Hydraulic cylinder is 1475mm, which can satisfy each annular shell with 2500 plate one-step lift. Greatly reduce the time waste.
7.Hydraulic cylinder basic height is 2050mm, which can match automatic girth welding machine to proceed internal girth seam welding.
8.Module configuration, the hydraulic jack quantity can be adjusted as per different size of tank and weight
9.High efficiency, each time lifting or falling down only needs around 15 minutes.
10.Can well cooperate with our tank welding machines, which can greatly reduce the manpower cost and reduce the construction time; Usually one Horizontal seam welding machine can match 6-10 skilled welder. Vertical seam welding machine can match around 20-30 people skilled welder and butt/fillet welding tractor can match 6-15 skilled welder.
At present, we have three types of hydraulic jacking system in WINCOO Engineering Co., LTD. They are the following three: Advanced hydraulic jacking system, Simple unfixing Holding -latch hydraulic Jacking system and Simple chain type hydraulic jacking system.
Hydraulic jacking system (package unit) is evenly distributed around tank inner wall. Tank top and upper (the first layer) wall plates are lifted first and then install and weld wall plates of tank body. Self locking hydraulic jacking system and hydraulic hoist composing of lifting frame and lifting rod are adopted. When oil enters hydraulic jacking system, upper clamp fastens and lifts lifting rod and expansion ring and mobilize tank (including tank top) to ascend upward. When oil returns to jack, upper clamp returns with piston and lower clamp automatically fastens lifting rod without gliding. The jack repeats the movement and make lifting rod ascend with tank to designated height (spare height for next layer of plate). After butt weld of next layer of wall plates, open upper and lower loosening device and loosen upper and lower clamp to make lifting rod and expansion ring descend to lower expanded and welded rib plate of the next layer of wall plates and then lift. Repeat the process and ascend welded tan till the last layer of wall plates are installed and welded. The installation of the whole storage tank is completed.
The following short description gives the working procedure in outline. It can in certain details be modified when required.
1.The tank bottom – plates are placed on the prepared foundation and welded together.
2.The beams or lattice work of the roof are assembled and finally joined to the upper rim of the shell ring.
3.The hydraulic jacking system is installed in the tank. The plates of the second shell ring (next to the top ring) are positioned outside the first one.
4.The completed part of the tank (roof and top shell ring) is lifted hydraulically to a height at which the plates of the second ring can be moved into place and the roof sheeting can be completed.
5.The plates of the second shell ring are located exactly and welded together to the lower edge of the first ring.
6.The plates of the third shell ring are placed outside the second shell ring.
7.The completed part of the tank (roof the two uppermost shell rings) is lifted.
8.The above cycle of operations is repeated until the last (bottom) shell ring is finished.
9.The entire tank is lowered down to the bottom plate and welded to this.
10.The lifting equipment is dismantled.
Hydraulic jacking system is mainly used in large tank construction. WINCOO ENGINEERING CO.,LTD is supplying tank hydraulic jacking system to tank contractors worldwide.
Rolling machine is used to roll metal sheet into cylindrical, arc, fan, cone and other workpieces. It is general equipment specially used for bending, forming and correcting metal sheet, pressure vessels and machinery manufacturing industries, has a wide range of applications.
How does a rolling machine work?
What are the classifications of rolling machines?
How to maintain the rolling machine?
The upper roller of the symmetrical rolling machine is at the symmetrical position of the center of the two lower rollers. The hydraulic oil in the hydraulic cylinder acts on the piston to make vertical lifting movement. The plastic metal sheet with flat specification passes between the three work rolls (two lower rolls and one upper roll) of the rolling machine. With the help of the lower pressure of the upper roll and the rotational movement of the lower roll, the metal plate is continuously processed through multiple passes. Bending (the inner layer is compressed and deformed, the middle layer is unchanged, and the outer layer is stretched and deformed), resulting in permanent plastic deformation, and rolled into the required cylinder, cone or part of them.
Rolling machines have different types depending on the field of use. According to the number of rolls, it is divided into three-roller and four-roller. The three-roller is divided into a symmetrical three-roller plate rolling machine, a horizontal-down three-roll plate-rolling machine, an arc-down-type plate-rolling machine, an upper-roll universal three-roll plate rolling machine, and a hydraulic CNC plate rolling machine. From the transmission, it is divided into mechanical type and hydraulic type. In terms of the development of the plate rolling machine, the upper roll universal type is the most backward, the horizontal downward type is slightly advanced, and the arc downward type is the most advanced.
1. According to the regulations in the machine lubrication diagram, add oil to each oil cup lubrication and manual lubrication points as required.
2. Roll the plate according to the parameters specified by the plate rolling machine, the thickness of the plate is 20mm, the maximum length is 2500mm, and the yield limit of the plate material is less than 250Mpa.
3. After the power is turned on, carry out the forward and reverse directions of the lower roller and the lifting and lowering of the upper roller, and check whether there is any abnormal stuck phenomenon in each movement.
4. Operate in strict accordance with the rolling process procedures and operation methods, and pay great attention to the safe operation of the equipment when the upper roller is lifted to the limit position.
5. When the main drive stops, the upper roller can be lifted and lowered, the overturned bearing can be tilted and reset, and the upper roller can be lifted.
Great products begin with the best engineering staff, and WINCOO ENGINEERING CO., LTD is ready to assist you with your technical requirements for rolling machine.
Tank welding machine is actually a transformer with lower external characteristics, which converts 220V and 380V alternating current into low-voltage direct current. Generally, welding machines can be divided into two types according to the output power type, one is AC power and the other is DC.
Here is the content list:
l What is a tank welding machine?
l What are the specific types of tank welding machines?
l Working principle of tank welding machine.
The tank welding machine can be said to be a high-power rectifier. It is divided into positive and negative poles. When AC power is input, it is transformed by a transformer, and then rectified by the rectifier, and then outputs a power supply with reduced external characteristics.
The output terminal is on and off. When it is turned on, a huge voltage change will be generated. When the two poles are short-circuited in an instant, the arc will be ignited. The arc will be used to melt the electrode and the welding material, and the purpose of combining them will be achieved after cooling. Welding transformers have their own characteristics,The external characteristic is the sharp drop in voltage after the electrode is ignited.
1. Light tank welding machine is mainly full rivet type or mixed rivet and welding.
2. The medium tank welding machine is to forge several steel molds, then fill with solder and directly weld.
3. Heavy-duty tank welding machine, the steel plate is forged into a gear staggered shape, first buckled like a button, and then filled with solder, mainly to reduce the burden of the heavy armor on the solder.
The main component of the tank welding machine is a step-down transformer. The two ends of the secondary coil are the work piece and the electrode to be welded. They will ignite the arc during operation and weld the electrode to the gap of the work piece under the high temperature of the arc. Because the iron core of the tank welding machine transformer has its own characteristics, it has the characteristics of a sharp drop in voltage, that is, the voltage drops after the electrode is ignited; when the electrode is short-circuited due to adhesion, the voltage drops sharply.
During the welding operation of the welding machine, although the current in the circuit is equal everywhere, since the resistance is different everywhere, the resistance at the unfixed contact is the largest. According to the law of thermal effect of flow, Q = IRt: When the current is equal, the greater the resistance, the higher the heat generation. Therefore, in the welding process, the contact resistance of the electrode contact point as the contact point of the metal body is the largest, so the electric heat generated in this part is naturally the largest, and the electrode is an alloy with a lower melting point.
The tank welding machine first uses a pulse generating circuit such as a 555 time base circuit to generate a rectangular pulse wave, then uses a transistor for current amplification, and then uses a pair of complementary field-effect transistors for voltage amplification to generate high-frequency signals, and finally uses the transformer with To boost the voltage, and get the induced alternating current on the secondary winding. Its power depends on the amplification capability of the amplifying circuit.
Tank welding machines mostly use single-ended forward inverter circuits composed of IGBT tubes, and most of their control systems use pulse width modulation chip SG3525. The inverter frequency is 20kHz, which can control the external characteristics of constant current.
When the system is at no load, the PWM modulator will output pulses intermittently due to voltage feedback control. Due to the low frequency of intermittent oscillation and narrow pulse width, not only the no-load loss is small, but the transformer is not easily saturated. Because this kind of welding machine adopts the control technology with pulse width modulation PWM as the core.
What is more? WINCOO provide not only tank welding machines, but also pipe spool fabrication solutions for customers from everywhere!