CN202939098U - Hydrostatic testing machine for testing pressure of steel pipes with different diameters - Google Patents
Hydrostatic testing machine for testing pressure of steel pipes with different diameters Download PDFInfo
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- CN202939098U CN202939098U CN 201220611417 CN201220611417U CN202939098U CN 202939098 U CN202939098 U CN 202939098U CN 201220611417 CN201220611417 CN 201220611417 CN 201220611417 U CN201220611417 U CN 201220611417U CN 202939098 U CN202939098 U CN 202939098U
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Abstract
The utility model discloses a hydrostatic testing machine for testing the pressure of steel pipes with different diameters. A constant pressure variable pump is communicated with a master oil cylinder 4 through an electromagnetic directional valve YA7 and a master oil cylinder pressure sensor 10, communicated with a liquid filling oil tank 1 through the electromagnetic directional valve YA7, the master oil cylinder pressure sensor 10, a liquid filling valve K3 and a disconnecting valve K1, and communicated with one oil transportation port of a left-side oil cylinder 3 and one oil transportation port of a right-side oil cylinder 5 through an electromagnetic directional valve YA6 and a master oil cylinder pressure sensor 9; an electromagnetic directional valve YA1 is communicated with a hydraulic system, and communicated with one oil transportation port of the left-side oil cylinder 3 and one oil transportation port of the right-side oil cylinder 5 through a cartridge valve C1, an electromagnetic directional valve YA3 and a liquid-saving cartridge valve C3, and the cartridge valve C1 is communicated with a cartridge valve C2; an electromagnetic directional valve YA2 is communicated with the hydraulic system and communicated with another oil transportation port of the left-side oil cylinder 3 and another oil transportation port of the right-side oil cylinder 5 through a cartridge valve C2 and the electromagnetic directional valve YA3, and a cartridge valve C4 and an electromagnetic directional valve YA4 which are mutually communicated are communicated with another oil transportation port of the left-side oil cylinder 3, another oil transportation port of the right-side oil cylinder 5 and an oil tank.
Description
Technical field
The utility model belongs to the water pressure engine technical field, is specifically related to test the hydrostatic testing machine of different tube diameters steel pipe pressure.
Background technology
Produce bigbore submerged arc welding spiral pipe, the submerged arc welding straight-seam pipes must carry out hydrostatic test to every steel pipe according to regulation in 9.4 hydrostatic tests of the APISPEC5L of American Petroleum Institute (API) standard, and Seepage must not be arranged.Welded still pipe hydrostatic test process is: master cylinder applies certain pretightning force, after sealing by the Welded Pipe both ends of the surface, will be full of in welded tube low-pressure water and will manage in Bas Discharged, pass through after supercharging pressurize certain hour again, then the welded tube hydrostatic test is namely completed in off-load.Last century, the nineties when large diameter steel pipe is done the hydraulic testing, was done encapsulant with polyurethane abroad, and in employing, radially or outer radial sealing, radial seal hydraulic press testing head is wide in variety, and manufacturing cost is high, and the cushion rubber life-span is short, faults frequent.Quality raising along with domestic polyurethane material, generally all require to adopt end face seal structure, it is simple and convenient that it has the sealing ring of replacing, must frequently not change hydrostatic testing machine test head, the advantage such as save time, but when major diameter hydrostatic testing machine pressure testing small-caliber steel pipe, will occur that seal face leaks and the sealing force of master cylinder Welded Pipe pipe end is excessive causes the phenomenon that the urethane seal plate is damaged or body is bent.
In hydraulic testing process, the hydraulic pressure in the acting force of master cylinder and welded tube balances each other to the acting force of oil cylinder, the oil pressure value variation △ P of master cylinder
OilBe △ P
WaterX(R
Water/ R
Oil)
2, the unit of hydraulic pressure value change in steel pipe, the change of the oil pressure of master cylinder is (R
Water/ R
Oil)
2When major diameter hydrostatic testing machine pressure testing small-caliber steel pipe, pipe diameter and master cylinder diameter have big difference, the oil pressure value of master cylinder is along with the change of the hydraulic pressure value in steel pipe is very small, make the precision of pressure transducer not reach required value, cause the hydraulic pressure in the oil pressure of master cylinder and steel pipe can not precise synchronization, the tight or urethane seal plate of pipe end butt-end packing will occur bad by the Steel pipe end surface top.Manufacturer wishes that all the steel pipe kind coverage of a production line production is The more the better, the steel pipe of specification of all sizes can be produced, adopting the large-tonnage water pressure engine is exactly inevitable choice, but, the large-tonnage water pressure engine but shows a lot of deficiencies in the pressure testing process to the small dimension welded tube, actual conditions are requirements that a kind of oil cylinder of diameter is difficult to reach the various bore steel pipes of pressure testing.
Existing water pressure engine only comes pressure testing with a master cylinder, and two side cylinders only play the effect that promotes hydraulic press testing head forward-reverse.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned water pressure engine, provide a kind of reasonable in design, simple in structure, result of use is good, cost of products is low, the hydrostatic testing machine of the test different tube diameters steel pipe pressure of long service life.
solving the problems of the technologies described above the technical scheme that adopts is: be provided with master cylinder and vent valve K2 at the hydraulic press testing centriciput, the left side is provided with the left side oil cylinder, the right side is provided with the right side oil cylinder, left end is provided with the water under high pressure telescopic that links with high pressure water system, right-hand member is provided with the low pressure water jacket that links with low pressure water system, the oil motor that links with constant pressure variable displacement pump and hydraulic system UNICOM, the delivery outlet of constant pressure variable displacement pump links by being arranged on the solenoid directional control valve YA7 that connects on pipeline and the oil transportation mouth of master cylinder pressure transducer and master cylinder, the delivery outlet of constant pressure variable displacement pump is by being arranged on the solenoid directional control valve YA7 that connects on pipeline, the master cylinder pressure transducer, prefill valve K3, stop valve K1 and surge-tank link, constant pressure variable displacement pump links by being arranged on the solenoid directional control valve YA6 that connects on pipeline and an oil transportation mouth of side cylinder pressure transducer and left side oil cylinder and right side oil cylinder, the delivery outlet of constant pressure variable displacement pump links by proportional pressure control valve BYA1 and the hydraulic reservoir that is arranged on pipeline.Being arranged on solenoid directional control valve YA5 on pipeline and hydraulic system and fuel tank and prefill valve K3 links; The solenoid directional control valve YA1 that is arranged on pipeline links with hydraulic system and links by inserted valve C1, the solenoid directional control valve YA3 that connects, an oil transportation mouth that saves liquid inserted valve C3 and left side oil cylinder and right side oil cylinder, inserted valve C1 and inserted valve C2 link, and solenoid directional control valve YA3 and joint liquid inserted valve C3 link by pipeline and hydraulic reservoir; Be arranged on that solenoid directional control valve YA2 on pipeline links with hydraulic system and link by the inserted valve C2, the solenoid directional control valve YA3 that connect and another oil transportation mouth of left side oil cylinder and right side oil cylinder, inserted valve C4, the solenoid directional control valve YA4 of UNICOM link and link with fuel tank by another oil transportation mouth of pipeline and left side oil cylinder and right side oil cylinder mutually.
The utility model is to the improving of traditional water pressure engine hydraulic system, and makes master cylinder and two side cylinders can pressure testing.The utility model water pressure engine selects corresponding oil cylinder to come pressure testing according to the pressure testing pipe diameter size, with two side cylinder pressure testing small-caliber steel pipes, with master cylinder pressure testing medium caliber steel pipe, with two side cylinders and master cylinder pressure testing large-diameter steel pipe.Compare with the water pressure engine of the identical tonnage of tradition, the total area of the utility model master cylinder and two side cylinders equals the area of the original master cylinder of traditional water pressure engine, and the utility model master cylinder diameter is reduced.Simultaneously, the both sides cylinder diameter strengthens, and the side cylinder area of increasing will satisfy the technical conditions of Φ 406.4-Φ 820 steel tube pressure-measurings.After the side cylinder enlarged diameter, hydraulic press testing head forward-reverse Speed Reduction adopts differential circuit to improve pace.
Pipe end adopts the butt-end packing form, comes the steel pipe of pressure testing different tube diameters with the oil cylinder of three kinds of different tube diameters, has reduced the area difference of pipe diameter cross-sectional area and operating cylinder diameter, improves the reliability of butt-end packing.When having solved large-scale water pressure engine pipe end employing butt-end packing, to the flimsy drawback of pressure testing minor-diameter steel-tube encapsulant.The master cylinder internal diameter reduces, and reduces manufacturing cost, has extended serviceable life.The utlity model has reasonable in design, simple in structure, the advantages such as result of use is good, cost of products is low, long service life, can be used for the pressure test of different tube diameters steel pipe.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but the utility model is not limited to these embodiment.
In Fig. 1, the hydrostatic testing machine of the test different tube diameters steel pipe pressure of the present embodiment is made of surge-tank 1, water under high pressure telescopic tube 2, left side oil cylinder 3, master cylinder 4, right side oil cylinder 5, low-pressure water sleeve pipe 6, hydraulic press testing head 7, side cylinder pressure transducer 9, master cylinder pressure transducer 10, constant pressure variable displacement pump 11, oil motor 12, hydraulic reservoir 13, solenoid directional control valve YA1～solenoid directional control valve YA7, inserted valve C1～inserted valve C4, surplus valve Y1, proportional pressure control valve BYA1, stop valve K1, vent valve K2, prefill valve K3 connection.
The piston rod of master cylinder 4 is fixedly connected with the screw threads for fastening connector and is arranged on the middle part of hydraulic press testing head 7, the piston rod of left side oil cylinder 3 is fixedly connected with the screw threads for fastening connector and is arranged on the left side of hydraulic press testing head 7, the piston rod of right side oil cylinder 5 is fixedly connected with the screw threads for fastening connector and is arranged on the right side of hydraulic press testing head 7, the piston rod of left side oil cylinder 3 and the piston rod of right side oil cylinder 5 promote hydraulic press testing head 7 and move back and forth, and the piston rod that drives master cylinder 4 moves back and forth.Hydraulic press testing head 7 left ends are fixedly connected with the screw threads for fastening connector water under high pressure telescopic tube 2 are installed, left side, water under high pressure telescopic tube 2 that water under high pressure telescopic tube 2 is positioned at left side oil cylinder 3 link by pipeline and high pressure water system, and the water of high pressure water system is tested in water under high pressure telescopic tube 2 enters underproof steel pipe.Hydraulic press testing head 7 right-hand members are fixedly connected with the screw threads for fastening connector low pressure water jacket are installed, the low pressure water jacket is positioned at the right side of right side oil cylinder 5, low-pressure water sleeve pipe 6 links by pipeline and low pressure water system, first will compress water during on-test in low-pressure water sleeve pipe 6 enters into underproof steel pipe, then in underproof steel pipe.
Being arranged on solenoid directional control valve YA5 on pipeline and hydraulic system and fuel tank and prefill valve K3 links.Provide pressure source by hydraulic system for master cylinder 4.
The solenoid directional control valve YA1 that is arranged on pipeline links with hydraulic system and links by inserted valve C1, the solenoid directional control valve YA3 that connects, an oil transportation mouth that saves liquid inserted valve C3 and left side oil cylinder 3 and right side oil cylinder 5, inserted valve C1 is connected by pipeline with inserted valve C2, provide pressure source by hydraulic system for the action of left side oil cylinder 3, right side oil cylinder 5, solenoid directional control valve YA3 and joint liquid inserted valve C3 link by pipeline and hydraulic reservoir 13.Left side oil cylinder 3, when right side oil cylinder 5 is failure to actuate, flow back into hydraulic reservoir 13 from the hydraulic oil of hydraulic system input through solenoid directional control valve YA3 and joint liquid inserted valve C3.
Be arranged on that solenoid directional control valve YA2 on pipeline links with hydraulic system and link by the inserted valve C2, the solenoid directional control valve YA3 that connect and another oil transportation mouth of left side oil cylinder 3 and right side oil cylinder 5, provide pressure source by hydraulic system for the action of left side oil cylinder 3, right side oil cylinder 5, inserted valve C4, the solenoid directional control valve YA4 of UNICOM link and link with fuel tank by another oil transportation mouth of pipeline and left side oil cylinder 3 and right side oil cylinder 5 mutually.
The course of work of the present utility model is as follows:
1, the course of work before pressure testing
Commutate after solenoid directional control valve YA5 and power connection, pressure oil is opened prefill valve K3, and surge-tank 1 replenishes fluid for master cylinder 4.To two side cylinder back cavities, throttle cartridge valve C4 is opened in the solenoid directional control valve YA4 commutation of switching on through inserted valve C1 for the solenoid directional control valve YA1 commutation of switching on, pressure oil, left side oil cylinder 3 and the 5 ante-chamber oil returns of right side oil cylinder, and hydraulic press testing head 7 advances, and will be held out against by test steel pipe 8.Water enters by test steel pipe 8 through low-pressure water sleeve pipe 6, after vent valve K2 water outlet, closes vent valve K2, stops exhaust and water inlet.Water under high pressure enters by test steel pipe 8 through telescopic tube simultaneously, makes by the interior hydraulic pressure of test steel pipe 8 to raise.
2, work pressure test process
To small-bore by test steel pipe 8 pressure testings: the solenoid directional control valve YA6 commutation of switch on, oil-filled to left side oil cylinder 3 and right side oil cylinder 5, master cylinder 4 is unsteady.
Heavy caliber is tested steel pipe 8 pressure testings: solenoid directional control valve YA6, the solenoid directional control valve YA7 commutation of switching on, give simultaneously master cylinder 4, left side oil cylinder 3 and right side oil cylinder 5 back cavities, replenish through the given pressure oil of proportional pressure control valve BYA1, reach after trial value after 5～15 seconds, open vent valve K2 release.
3, the course of work after pressure testing
Solenoid directional control valve YA6, solenoid directional control valve YA7 outage, the solenoid directional control valve YA5 commutation of switching on, open prefill valve K3, the solenoid directional control valve YA2 commutation of switching on, pressure oil arrives left side oil cylinder 3 and right side oil cylinder 5 back cavities through inserted valve C2, the solenoid directional control valve YA3 commutation of switching on, ante-chamber oil are through inserted valve C3 oil return case, and the test head retreats.
Claims (1)
1. hydrostatic testing machine of testing different tube diameters steel pipe pressure, be provided with master cylinder (4) and vent valve K2 in the middle part of hydraulic press testing head (7), the left side is provided with left side oil cylinder (3), the right side is provided with right side oil cylinder (5), left end is provided with the water under high pressure telescopic that links with high pressure water system, right-hand member is provided with the low pressure water jacket that links with low pressure water system, it is characterized in that: the oil motor (12) that links with constant pressure variable displacement pump (11) and hydraulic system UNICOM, the delivery outlet of constant pressure variable displacement pump (11) links by the oil transportation mouth that is arranged on the solenoid directional control valve YA7 that connects on pipeline and master cylinder pressure transducer (10) and master cylinder (4), the delivery outlet of constant pressure variable displacement pump (11) is by being arranged on the solenoid directional control valve YA7 that connects on pipeline, master cylinder pressure transducer (10), prefill valve K3, stop valve K1 and surge-tank (1) link, constant pressure variable displacement pump (11) links by an oil transportation mouth that is arranged on the solenoid directional control valve YA6 that connects on pipeline and side cylinder pressure transducer (9) and left side oil cylinder (3) and right side oil cylinder (5), the delivery outlet of constant pressure variable displacement pump (11) links by proportional pressure control valve BYA1 and the hydraulic reservoir (13) that is arranged on pipeline, being arranged on solenoid directional control valve YA5 on pipeline and hydraulic system and fuel tank and prefill valve K3 links, the solenoid directional control valve YA1 that is arranged on pipeline links with hydraulic system and links by inserted valve C1, the solenoid directional control valve YA3 that connects, an oil transportation mouth that saves liquid inserted valve C3 and left side oil cylinder (3) and right side oil cylinder (5), inserted valve C1 and inserted valve C2 link, and solenoid directional control valve YA3 and joint liquid inserted valve C3 link by pipeline and hydraulic reservoir (13), be arranged on that solenoid directional control valve YA2 on pipeline links with hydraulic system and link by the inserted valve C2, the solenoid directional control valve YA3 that connect and another oil transportation mouth of left side oil cylinder (3) and right side oil cylinder (5), inserted valve C4, the solenoid directional control valve YA4 of UNICOM link and link with fuel tank by another oil transportation mouth of pipeline and left side oil cylinder 3 and right side oil cylinder (5) mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611417 CN202939098U (en) | 2012-11-16 | 2012-11-16 | Hydrostatic testing machine for testing pressure of steel pipes with different diameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611417 CN202939098U (en) | 2012-11-16 | 2012-11-16 | Hydrostatic testing machine for testing pressure of steel pipes with different diameters |
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| Publication Number | Publication Date |
|---|---|
| CN202939098U true CN202939098U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220611417 Expired - Fee Related CN202939098U (en) | 2012-11-16 | 2012-11-16 | Hydrostatic testing machine for testing pressure of steel pipes with different diameters |
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| Country | Link |
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| CN (1) | CN202939098U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527533A (en) * | 2013-10-24 | 2014-01-22 | 中冶辽宁德龙钢管有限公司 | Device and solution for preventing top oil tank of hydrostatic pressure testing machine from oil injection |
| CN103884611A (en) * | 2014-03-25 | 2014-06-25 | 上海出入境检验检疫局机电产品检测技术中心 | Pressure testing device of pressure-bearing systems and members |
| CN110333691A (en) * | 2019-06-21 | 2019-10-15 | 中石化石油机械股份有限公司沙市钢管分公司 | A kind of monitoring of hydraulic press testing and information store analysis system |
-
2012
- 2012-11-16 CN CN 201220611417 patent/CN202939098U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527533A (en) * | 2013-10-24 | 2014-01-22 | 中冶辽宁德龙钢管有限公司 | Device and solution for preventing top oil tank of hydrostatic pressure testing machine from oil injection |
| CN103884611A (en) * | 2014-03-25 | 2014-06-25 | 上海出入境检验检疫局机电产品检测技术中心 | Pressure testing device of pressure-bearing systems and members |
| CN103884611B (en) * | 2014-03-25 | 2016-08-31 | 上海出入境检验检疫局机电产品检测技术中心 | Pressure bearing system and the pressure experimental device of parts |
| CN110333691A (en) * | 2019-06-21 | 2019-10-15 | 中石化石油机械股份有限公司沙市钢管分公司 | A kind of monitoring of hydraulic press testing and information store analysis system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131116 |