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Here is the content list:
l Regarding the quality inspection of pipeline construction equipment installation.
l What are the quality control measures in the installation of pipeline construction equipment?
l Regarding the quality control of pipeline construction equipment after construction.
The sequence of installation of pipeline construction equipment is:
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 .
After the installation of pipeline construction equipment is completed, quality inspection is required. After pipeline construction equipment is installed and put into use, regular monitoring is required. Generally, radiographic inspection is used to inspect the quality of pipeline installation. This monitoring has a very good effect on the internal inspection of welded joints. It is widely used in the field of construction equipment installation. This method can also be used to make the quality of the pipeline meet the assessment standard.
Before installing pipeline construction equipment, clarify the construction plan of the construction technicians, use GB/T as the standard, and carry out construction in accordance with national standards and specifications; during the installation of pipeline construction equipment, strictly review the drawings for defects to ensure the rationality of the drawings, and the construction unit It is also necessary to make preparations for pipeline installation and construction, pipeline lumber, welding inspection, construction site management, etc.
Strictly follow the relevant requirements of pipeline construction equipment and pipeline construction requirements to improve the quality of construction. In order to ensure the quality of pipeline installation, quality control is required for key parts such as welding materials, welding processes, and welding seams to ensure pipeline construction equipment. Welding consumables, brands, specifications, etc. are required by the plan design, which are consistent with the project construction requirements to ensure the quality of installation.
① After the pipes, accessories and raw materials used for pipeline construction equipment enter the construction site, the supervisors shall check and accept them on site, and store the materials after passing the acceptance.
② Pipe joints and semi-finished products of pipeline construction equipment should be guaranteed not to be damaged during transportation and storage. When unloading, handle with care and not collide with each other; choose a flat place for stacking pipe joints.
③ The storage temperature of the rubber ring of pipeline construction equipment is between -5 and 30 degrees Celsius. It should not be exposed to ultraviolet light source and keep away from the heat source; the rubber ring and the items that easily affect the rubber ring should not be put together. If the pipeline construction equipment is being constructed In winter, hard rubber rings are not allowed.
④ For trench excavation in open-cut pipeline engineering, the section should meet the design requirements of construction quality, the original soil at the bottom of the trench should not be damaged, and the mechanical excavation should reserve a 200-300mm soil layer for manual excavation and leveling, and the bottom of the trench can be soaked by water And frost damage, if there is gravel soil, lime soil to backfill, the trench wall should be leveled to meet the requirements of construction design.
⑤ For concrete construction, when the pipe seat and flat foundation are poured in layers, the flat foundation should be shaved and rinsed; the concrete should be prevented from segregation, and the concrete should be cured after pouring.
⑥ When pipeline construction equipment is installed, visual inspection and internal cleanliness of the pipeline must be inspected.
⑦ The flexibility of pipe joints must meet the design requirements, and the rigidity must also meet the requirements.
⑧ In the stage of backfilling, the backfill height between both sides of the pipe and the top of the pipe before the hydraulic test of the pressure pipeline is greater than 0.5M, and the pressure-free pipeline shall be backfilled after the closed water test and the closed gas test have reached the standard.
After the completion of the pipeline construction equipment, the finishing work will begin. The unit needs to organize personnel to review the material documents involved in the pipeline installation, project reports, etc.; after the completion of the project, debugging and quality appraisal are required, and the pipeline professionals are organized to conduct quality appraisal of the installed pipelines. The dynamic control of the links will protect the completed pipelines.
In the later stage of the installation of pipeline construction equipment, in order to ensure the smooth completion of the project, the quality of the pipeline needs to be tested again to ensure that the pipeline installation does not have problems such as tilt and cracks, the welding parts are of good quality, and the pipeline is unobstructed. In the later period after the completion of the project, it is necessary to sort out each project data and work files involved in the pipeline construction, do a good job of archiving and backup to evaluate the quality of the pipeline, do a good job in risk control, and carry out the acceptance of pipeline construction equipment.
There are many influencing factors in the installation of pipeline construction equipmentt, so reasonable measures need to be taken to monitor and control every aspect of pipeline construction equipment. With the continuous expansion of the pipeline construction equipment construction industry, the use area is also expanding. Due to the importance of pipeline use, it is necessary to control the pipeline installation quality to ensure that the installation quality reaches the ideal standard!
What is more? WINCOO provide not only pipeline construction solutions, but also pipe spool fabrication solutions for customers from everywhere!
The old customer in Southeast Asian countries purchased four sets of vertical tank welding machines from us in October this year. This is their second purchase this year. They purchased two sets at the beginning of the year.You should know that they have purchased 8 units last year, and in total, they purchased 14 units from us.
Simple chain type hydraulic jacking system is composed of one-stage double-acting hydraulic cylinder, pulley block, load-bearing chain and oil way etc. Moveable pulley is used to enlarge chain stroke, i.e. traveling distance of the cylinder is 1/2 of lifting distance of the chain. It applies to inverted installation and construction of various large storage tanks (steel) and various storage tanks.
LYT-type simple chain type hydraulic jacking system includes the following models: LYT-120-2700, LYT-200-2700, and LYT-300-2700 etc. (those with special stroke need to be customized).
What is the operation process of the simple chain type hydraulic jacking system?
What is the working principle of the simple chain type hydraulic jacking system?
What are the advantages of simple chain type hydraulic jacking system?
LYT-type simple chain type hydraulic jacking system is used to firstly lift the tank roof and the top (first layer) siding of the tank. It's required to group weld tank siding when the lifting height of siding exceeds the second siding (the second layer from the top) by 30-50mm, and group weld the third layer (the third layer from the top to the bottom) of the tank after lifting again, lift successively, group weld the siding of the tank layer by layer, until the last layer of siding.
LYT-type simple chain type hydraulic jacking system is used for lifting. When oil enters the hydraulic jack, the movable pulley is pushed upward by pressing the piston, thus driving the load-bearing chain to lift the expansion ring. In this way, the whole tank (including tank roof) is lifted up, until it reaches the pre-set height (there is a voidance of the next layer of plate). The siding in this layer is surrounded for butt welding. After the positioning block is welded, hydraulic hoist returns and the lift tank falls back to the newly-surrounded siding. After welding of circular seam and vertical seam, the door-type card for fixing expansion ring is cut off and the expansion ring is released. In this way, the hoist returns and expansion ring falls to the Model of hydraulic pump station Tank volume Rated pressure Rated flow Power Control voltage of solenoid valve Motor drive rate YB-7.2 220L (700*550*580) 25Mpa 7.2L/min Three-phase Four-wire (380V) 220V 5.5KW YB-14.5 340L (750*650*650) 25Mpa 14.5L/min 220V 7.5KW Mode of LYT-type hoist Rated lifting capacity (KN) Hydraulic area (mm) Rated oil pressure (MPa) Piston stroke (mm) Chain stroke (mm) Cylinder safety equipment Reinforcement measures LYT-120-2700 120 11304 25 1500 2700 Double-direction oil-way hydraulic lock 2 adjustable pull rods LYT-200-2700 200 18859.6 25 1500 2700 Double-direction oil-way hydraulic lock 2 adjustable pull rods LYT-300-2700 300 25434 25 1500 2700 Double-direction oil-way hydraulic lock 2 adjustable pull rods bottom of tank siding. Then, the next circular plate is expanded and transfer rib plate, such as door-type card, is welded for lifting, and so forth. The group welded tank is lift, until group weld of the last layer of siding, so that the whole storage tank is installed with this inverted method.
1. Simple chain type hydraulic jacking system is stable, safe and reliable. Due to the adoption of unified hydraulic control and single or partial (several) adjustment, the whole lifting process is relatively stable. The hoist is provided with synchronizing valve and hydraulic lock to prevent sliding and falling of the tank or heavy loads, which are caused by power failure and fracture of oil tube. Hydraulic lifting is stable, safe and reliable.
2. Construction quality is ensured. As the hoist is provided with synchronizer and adjustable function, lifting height can be controlled accurately. Due to above reasons, quality of the tank is ensured.
3. The simple chain type hydraulic jacking system is easy to operate. Construction environment is good and work efficiency is high.
4. The simple chain type hydraulic jacking system is well-adapted. As long as the number of hydraulic hoists is increased or decreased, the whole set of equipment can be applied to the inverted hydraulic lifting construction of large storage tanks with different volumes ranging from several thousand cubic meters to tens of thousands cubic meters.
5. The hydraulic pump station and the hydraulic hoist are placed in the tank for easy operation. Finally, a door-closing plate is reserved to move the equipment out of the storage tank, and the door-closing plate is group welded well.
6. The hydraulic pump station can be controlled singly or jointly, and has strong construction adaptability and excellent technical performance price ratio.
7. Short construction period, low cost and good economic benefit. Due to the high degree of modernization and the fast lifting speed of the complete set of equipment, it has low construction cost and good economic benefit. This technology is truly characterized with convenient and centralized control, simple operation, safety and reliability (no falling), accurate control of weld clearance and lifting height of heavy objects, which can ensure the quality of the project, save labor and reduce costs, and achieve remarkable economic benefits.
Wincoo Engineering Co.,ltd is a hydraulic machinery manufacturing company integrated with design, development, production and sales, which mainly manufactures LYT-type chain-type hydraulic hoist, SQD unfixing holding-latch hydraulic hoist and supporting products. Such products are mainly used for inverted lifting and installation of steel storage tanks. Founded in 2003, after years of concentrated scientific research and development, the company obtained the patent certificate of "Utility Model Hydraulic Hoist' issued by "China National Intellectual Property Administration", and the right to use the trademark of "WINCOO" in 2008, so as to enable products of Wincoo Engineering Co.,ltd to quickly become Chinese brands.
Tank hydraulic jacking system is mainly a closed or meshed hoistway enclosed by buildings or light steel structures and hydraulically driven cylinders to lift the platform. So what are the advantages and disadvantages of the use of tank hydraulic jacking system?
Here is the content list:
l What are the components of the tank hydraulic jacking system?
l What are the advantages and disadvantages of tank hydraulic jacking system?
l How to deal with the shortcomings of tank hydraulic jacking system?
A complete tank hydraulic jacking system consists of five parts, namely power components, executive components, control components, auxiliary components (accessories) and hydraulic oil.
The function of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, which refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. The structure of hydraulic pumps generally includes gear pumps, vane pumps, plunger pumps and screw pumps.
The function of the executive components (such as hydraulic cylinders and hydraulic motors) is to convert the pressure energy of the liquid into mechanical energy, and drive the load for linear reciprocating motion or rotary motion.
Auxiliary components include fuel tanks, oil filters, coolers, heaters, accumulators, oil pipes and pipe joints, sealing rings, quick-change joints, high-pressure ball valves, hose assemblies, pressure measuring joints, pressure gauges, oil level gauges, oil Thermometer etc.
The tank hydraulic jacking system consists of hydraulic pump station, oil cylinder, steel wire and stroke, which is easy to install and operate. The tank hydraulic jacking system uses PLC central control for lifting. Each power unit is equipped with an auxiliary balance device to ensure the accuracy of simultaneous lifting. In addition, the hydraulic lifting pump station has two operating modes: auxiliary manual control and control. The cylinder can be adjusted to lift individually, or it can be combined with other lifting units into a group, or it can be integrated with multiple lifts to achieve higher accuracy and better welding results!
On the other hand, all cylinders of the tank hydraulic jacking system are equipped with safety valves. It can be automatically locked, even in the event of a power failure, a rupture of the high-pressure hose, or a rupture, it can prevent the cylinder/fuel tank from falling. The number of tank hydraulic jacking system can be adjusted according to the tank size and weight high efficiency, it only takes 15 minutes for each rise or fall. It can be used in conjunction with our company's slot welding machine, which can greatly reduce labor costs and reduce construction time.
l Advantages of tank hydraulic jacking system:
1. Small size and light weight
2. Large rigidity, high precision and fast response
3. Large driving force, suitable for heavy load direct drive
4. Wide speed range and various speed control methods
5. Self-lubricating, self-cooling and long life
6. Easy to realize security protection
l Disadvantages of tank hydraulic jacking system:
1. Poor anti-contamination ability of working fluid
2. Sensitive to temperature changes
3. There is a hidden danger of leakage
4. Difficult to manufacture and high cost
5. It is not suitable for long-distance transmission and requires hydraulic energy
The tank hydraulic jacking system is generally flushed before it is officially put into operation. The purpose of flushing is to remove contaminants, metal chips, fiber compounds, iron cores, etc. remaining in the system. During the first two hours of work, even if the tank hydraulic jacking system is not completely damaged, It will also cause a series of failures. Therefore, the oil circuit of the tank hydraulic jacking system should be cleaned according to the following steps:
l 1) Clean the oil tank with an easy-to-dry cleaning solvent, and then use filtered air to remove solvent residues.
l 2) Clean all pipelines of the tank hydraulic jacking system. In some cases, the pipelines and joints need to be immersed.
l 3) Install oil filter in the pipeline to protect the oil supply pipeline and pressure pipeline of the valve.
l 4) Install a flushing plate on the current collector to replace precision valves, such as electro-hydraulic servo valves.
l 5) Check whether all pipelines are of appropriate size and connected correctly.
If it is found that the oil filter is clogged, change the oil filter immediately. The flushing cycle is determined by the structure of the tank hydraulic jacking system and the degree of system pollution. If the sample of the filter medium has no or few foreign pollutants, install a new oil filter and unload it. Flush the plate and install the valve to work! Planned maintenance: Establish a regular system maintenance system, and suggestions for better maintenance of the tank hydraulic jacking system are as follows:
l 1) Check and replace the oil at most 500 hours or three months.
l 2) Flush the imported oil filter of the oil pump regularly.
l 3) Check whether the hydraulic oil is contaminated by acidification or other pollutants. The smell of the hydraulic oil can roughly identify whether it has deteriorated.
l 4) Repair leaks in the tank hydraulic jacking system.
l 5) Ensure that no foreign particles enter the fuel tank from the vent cap of the fuel tank, the plug seat of the oil filter, the sealing gasket of the oil return line and other openings of the fuel tank.
Orbital welding machine uses electric current to generate a lot of heat between two rails to be welded with large resistance. The welding quality is good and the efficiency is high.
What are the advantages of orbital welding machine?
What are the technical requirements when using the orbital welding machine?
What are the fields of application of orbital welding machines?
The application range of the orbital welding machine is greatly increased, the structure is simple, the cost is low, the purchase cost of the user can be reduced, the installation operation is convenient, the auxiliary operation time is short, and the work efficiency is high. The support flexible rail includes two parallel rails, and each rail includes a strip substrate.
Orbital welding machine shall not be used if the rail has the following conditions:
1. The rail is judged to have internal damage or serious surface injury.
2. The depth of the pit after the top surface of the rail head is damaged and polished:
Weld repair on the line exceeds 8 mm;
Solder repairs over 10 mm outside the line.
3. For scratches, spalling, falling blocks and welding joint wear, low collapse, etc. on the top surface of the rail head, the allowable length of welding repair shall meet the following requirements:
For rail joints (including welded joints) wear and low collapse, the allowable one-time welding repair length is 300 mm, and if the damaged length exceeds 300 mm, it should be divided into two sections for welding repair.
For defects and damages such as scratches, spalling and falling blocks on the top surface of the rail head, the length of one welding repair is allowed to be 200 mm. If the length exceeds 200 mm, it should be divided into two sections for welding repair.
When the rail joints are worn, slumped, scratched and peeled off at the same time, the scratches and peeled off blocks should be dealt with first.
At present, the development of railways is mainly in the direction of high-speed passenger cars, subway passenger cars, light rail cars, high-speed heavy-duty trucks, etc. In order to achieve these needs, it is necessary to reduce the weight of trains. A common practice now is to use aluminum alloy materials in the manufacturing process of passenger cars. Because aluminum alloy materials have the characteristics of light weight, corrosion resistance, smooth appearance, complex curved surfaces, and high specific strength, they can effectively reduce the resistance and quality of passenger cars, and increase the overload. In order to effectively improve the processing efficiency of aluminum alloy materials, it is necessary to change the traditional processing method and use the welding technology of the orbital welding machine for processing and manufacturing.
Wincoo Engineering Co., Ltd has ability of providing workable solutions to support clients to be awarded with shorter project execution time, fewer man-hour costs and higher efficiency construction/fabrication method and better quality during phase of project bidding.
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