Since entering Chinese market for more than 10 years, products of Wincoo Engineering Co.,ltd has been sold in nearly thirty provinces, cities and autonomous regions in China, and some overseas markets. The company has production line of advanced technology; meanwhile, Wincoo Engineering Co.,ltd designs, develops and processes products for famous domestic installation companies. With professional team, strict management and excellent equipment, the company strives to create the brand of "WINCOO", hydraulic hoist and series supporting products. As an expert of hydraulic hoist, WINCOO with charm of high technology is keen, innovative and forging ahead to establish design language of the company. In an all-inclusive and absorbing and open-minded manner, the hydraulic hoist and hydraulic pump station are perfectly combined to form hydraulic lifting equipment (hydraulic jack). As the founder and disseminator of hydraulic hoist, WINCOO has been building the inverted hydraulic jack and production technology of installation engineering for a long time.We are going to explain how to use the hydraulic jack safely.
●Safe operation code of hydraulic jack
●Precautions for the use of hydraulic jack
●How to repair and maintain hydraulic roof in daily use
1. Hydraulic lifting equipment must be operated by specialized operators;
2. Ground wire must be installed for hydraulic pump station;
3. Check whether motor is rotating in pump indicated direction after startup; motor for this equipment is step-down startup with six second interval. Supply oil for jack after full start of the motor; exhaust air in system via exhaust valve before lifting;
4. Rated pressure for hydraulic system is 25Mpa and pressure indication of pump station pressure gauge cannot exceed 26Mpa;
5. Check clamp block of upper and lower clamps for slip during jack lifting. If block teeth are filled with foreign matters, clean on time and clean the taper sleeve outside block. Grease the taper surface to reduce sliding friction between taper surface and block arc; if teeth shaped surface is severely worn more than 0.4mm, replace block on time. Remove upper and lower clamps and clean after each project. Check wear condition and replace when necessary;
6. Check whether exhaust valve is closed before lifting;
7. Increase pressure slowly during adjustment;
8. System pressure can be at 28Mpa for a short time. Avoid long-term operation for damaging the system;
9. Do not crash high pressure oil pipe with hard objects. Avoid welding slag scorching. Replace high pressure rubber pipe for loss on time;
10. Release the pressure in system via exhaust valve when replacing hydraulic components;
11. Lift jack for a few millimeters when loosening clamp. Unload lower clamp and loosen it;
12. Loosen all lower clamps for butt joint and check; if looseness is inadequate, do not descend jack for opposite joint to avoid lower clamp damage;
13. Adjust pressure precisely when jack is ascending or descending in place. Do not put solenoid valve at neutral position to avoid instantaneous overvoltage;
14. Long-term overload operation is prohibited;
Hydraulic oil level in oil tank should be regularly maintained to normal level. Due to large capacity chamber of piping and hydraulic cylinder, it is mostly required to fill adequate hydraulic oil. After startup, hydraulic oil enters pipeline and cylinder, oil level decreases and filter even shows above oil level. Replenish hydraulic oil once again. It’s inevitable that hydraulic oil has loss during use, therefore, observe oil level regularly and replenish on time to maintain it at the middle position of level meter;
Hydraulic oil shall be kept clean always. Use oil filter vehicle when filling hydraulic oil with filtration precision below 30υm;
Replacing cycle for hydraulic coil is one year for normal operation;
Discharge all residual oil in tank when replacing hydraulic oil and refill after cleaning the tank. Filtration precision of new oil shall not be lower than precision of the system. Oil amount in tank shall be maintained within fixed level range;
Oil temperature shall be appropriate, not more than 60℃. Check for abnormal oil temperature rise. Start hydraulic pump and operate as required after oil temperature reaches 15 ℃ during winter;
Pay attention to the following for initial startup of hydraulic pump:
1) Hydraulic oil level in the tank shall be at the full position of vernier;
2) Check rotation direction of motor and it shall be clockwise seen from motor tail (arrow direction). If the direction id reversed, stop immediately and regain operation after handling;
3) Step up after 10 minutes’ idle operation of pump station;
Pay attention to check return oil filter. Replace cartridge for damage on time;
Before starting and stopping hydraulic pump, unload the overflow valve;
Spares for wear parts (seal ring, clamp block, etc.) shall be available at all times for timely replacement;
Set pressure of overflow valve cannot exceed maximum pressure of hydraulic system;
Check and maintain the jack before operation to ensure there is no oil leakage, clamp and the whole machine is in good condition;
When inserting lifting rod, the jack shall be loosened (loosening nuts at upper and lower clamps are screwed upward in place). Note that lifting rod and jack shall be almost concentric. Reset upper and lower clamps for normal operation and make the jack in operating state;
Prevent mud and sand from entering hydraulic rubber pipes during connection to avoid damaging hydraulic system and the jack;
Overpressure (overload) is prohibited during operation;
Lifting height shall exceed 20-30mm of coaming height and make jack piston at middle position for butt weld;
Make the jack at lifting state when descending the rod and oil pressure cannot be higher than that during lifting, that is to adjust oil pressure below that during normal lifting and then loosen lower clamp. After the jack is back stroke and lifted steel plate falls on newly surrounded plates, the jack bears no load. Loosen upper clamp and lifting rod descends;
According to actual ambient temperature, it is decided to use N46 anti-wear hydraulic oil for the system and mix of other grades is prohibited;
Clean and maintain the jack on time after one project, especially attachment at clamp block teeth. Replace for severe teeth wear and repair the replaced jack.
Time for inspection
Monitor operating status during equipment operation
System pressure is stable and within specified scope.
Noise and vibration
Within 15-60℃, not more than 60℃
Within 105%-85% of rated voltage
For oil leakage of the system
Inspect before startup
Whether at red scale of level meter
Whether overflow valve is loosened
Whether ground wire is installed for pump station
Screw and pipe joints
Regular fastening: once a month
Oil filter and air filter
Regular inspection: once a month
Valve plate of oil tank pipeline
Regular inspection: dismantle, clean and replace sealing during overhaul
Specify as per working conditions and temperature, replace once every 3-4 years generally.
Specify as per working conditions and element quality. Replace for damage on time.
Hydraulic oil pollution test
Test after 1000 hours’ operation of the newly replaced hydraulic oil.
Sample with dedicated container to avoid pollution.
Sample the operating heated oil instead of static oil.
Sample 300-500ml each time.
Test oil plants test report and incorporate the result into equipment record.
Specify inspection cycle as per equipment usage.
High pressure rubber pipe
Specify replacement cycle as per working conditions.
Specify performance inspection of pump, valve, etc. as per working condition.
Hydraulic jacking system as a widely used tank lifting machine, its safety is widely supported and proven.What we said above is more to help you know how to use the hydraulic jack safely and correctly. I hope you found this helpful.
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, ground construction is an important link in the process of oilfield development and exploration to ensure production The key means of safety, especially the installation of pipeline construction equipment and the construction technology of gathering pipelines, play an important role.
Here is the content list:
l On the characteristics of the corporate piping system.
l About the characteristics of pipeline construction equipment welding.
l Analyze the causes and characteristics of common problems during welding of pipeline construction equipment.
On the characteristics of the corporate piping system.
Among all the equipment in power plant operation, pipelines are one of the most indispensable equipment, which are concentrated in EH oil pipelines, lubricating oil pipelines, jack shaft oil pipelines and boiler fuel oil pipelines. Such pipelines are generally ordinary 20 steel. Or 18-8 type stainless steel material, the related pipeline construction equipment has rich specifications and small pipe diameter.
The number of welds on the upper level of pipeline construction equipment is relatively large, and at the same time they are densely distributed; some pipeline welds are not easy to find and are relatively hidden, which often causes some problems during welding operations; especially stainless steel, which is high in chromium. Alloys and material types are unusual. Usually, when pipeline construction equipment is used, relatively large intergranular corrosion and hot cracking will occur, and the difficulty coefficient when completing welding work is relatively large.
About the characteristics of pipeline construction equipment welding.
Welding of pipeline construction equipment requires argon arc welding. For oil pipelines with a diameter of less than 60 mm or a thickness of 5 mm, the welding process for pipeline construction equipment can be full argon arc welding; if the diameter of the pipeline is greater than 60 mm If the thickness is greater than 5 mm, the relevant technicians need to change the welding process to argon arc welding bottom arc welding cover.
The key reason for this is that in stainless steel, the content of cr is already above 13%. A little carelessness will cause oxidation or excessive burning of the welding root. Therefore, when welding pipeline construction equipment, it is necessary to Argon filling or mixing of inert gas is carried out inside, so as to achieve the protective effect and ensure the welding construction quality of pipeline construction equipment.
Analyze the causes and characteristics of common problems during welding of pipeline construction equipment.
In recent years, some power plants have been shut down due to pipeline weld leaks or due to the quality of system welds. The existence of such phenomena will not only have a very bad impact on the overall operation, but also make the safety of the plant fall into threat situation.
In the construction of pipeline construction equipment welding engineering, there are two defects in welding, namely surface and internal defects. Surface problems can be discovered by the naked eye, but internal defects cannot be discovered in time by only relying on the senses. At this time, technicians and detection instruments are required to inspect pipeline construction equipment. Only through accurate inspection of the instrument can the problem be clearly known. Where is the root cause.
The welding quality of pipeline construction equipment will have a great impact on the operation of the unit. In other words, if the operation of the unit does not stop, it is probably because the pipeline construction equipment has welding quality problems.
Why do these problems occur in pipeline construction equipment? The reasons can be found from the following aspects:
l Because the pipeline construction equipment design unit only gave the system diagram but not the layout diagram, the construction personnel carried out the construction based on the site conditions and construction experience. The welding technicians did not know the location and quantity of the welding joints, so they could only make visual inspections or estimates based on their own experience. There will be a shortage in the number of weld inspections, which increases the probability of missing weld inspections;
l In the welding process of pipeline construction equipment, relevant technical personnel did not pay much attention to the particularity of the pipeline medium of the oil system, resulting in a low proportion of non-destructive inspections and potential safety hazards;
l When inspecting the welds of pipeline construction equipment, the relevant technicians usually only pay attention to the welds of the main parts and start the inspection, ignoring the inspection of other common welds, which may easily cause omissions;
l There are irregularities in the direction and layout of construction pipelines and brackets of pipeline construction equipment, and even stress and other reasons. As a result, the weld is not only the weakest part of the pipeline, but also the source of the first problem;
l Because the construction period of pipeline construction equipment is tight or there are requirements on the schedule, some who do not have welder skills or do not hold welder certificates will also temporarily serve as welding technicians. Such personnel who have not received professional welding training usually operate They are all conventional and ordinary welding skills. In the welding operation of pipeline construction equipment, there are problems such as insufficient sense of responsibility and low attention. At the same time, the quality of the plumber’s counterpart is not up to the standard and the awareness is relatively weak. Such problems will lead to pipeline construction equipment. There are quality problems and safety hazards in the weld joints.
Due to the large demand of oil and natural gas, not all places have these materials, so in order to transport and storage convenient, people use pressure vessels to store and transport.So how pressure vessels are airtight depends on the welding machine.The large volume of the pressure vessel and the amnesty of storage products require that the welder can move up and down, and the length is long enough.Today we are going to introduce such a special welding pressure vessel welding machine.
●Detailed introduction of welding manipulator.
●Product parameter of welding manipulator.
●Product features of welding manipulator.
Welding manipulator/welding column and boom is a kind of widely-used and high-automated auxiliary equipment in welding industry.Through the rotation of column and retraction&lifting of boom,welding manipulator meets welding requirements of cylinders with different sizes.Welding head is fixed at one end of welding manipulator to carry out automatic welding.This kind of welding manipulator could also be operated together with welding rotator/tank turning roller to carry out round and longitudinal welding of inside and outside seam,which has got extensive application in Boiler,Petrochemical,Shipbuilding and Steel structure industries.
Boom Lifting Stroke(meter)
Boom Retracting Stroke(meter)
Trolley Travel Speed(mm/min)
1. Structure:fixed type,fixed with rotation type and movable type
2. Both column and boom are cold-blended and goes through annealing treatment
3. There is anti-falling device to ensure the safety of boom lifting
4. Boom retracting adopts VFD,being stable and reliable
5. X-Y slide is fixed on one end of boom,which can be controlled by hand control panel
6. Control roller bears eccentric shaft,which can decrease clearance between roller and rail
7. Column revolve could be recognized by manual operation or electric drive
8. Control unit includes:electric control board and hand control panel.Interface with positioner and rotator is offered
9. Operation:Trolley,Director chair or platform,drag chain,seam tracking and monitor system,and flux recovery system.
The above is a brief introduction of our company's welder. If you want to know more, please click on our home page to browse related product information.
Based on full communication and trust, our customer in north Africa placed an order of nearly $150,000 for long-distance pipeline equipment within two days, and then paid 20% deposit within four days and agreed to deliver within seven days.
We will be more professional spirit and positive attitude to ensure that the customer's construction site smoothly.
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.