CN203272274U - Automatic pressure boosting and relieving system of hydrostatic testing machine - Google Patents
Automatic pressure boosting and relieving system of hydrostatic testing machine Download PDFInfo
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- CN203272274U CN203272274U CN 201320278430 CN201320278430U CN203272274U CN 203272274 U CN203272274 U CN 203272274U CN 201320278430 CN201320278430 CN 201320278430 CN 201320278430 U CN201320278430 U CN 201320278430U CN 203272274 U CN203272274 U CN 203272274U
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Abstract
The utility model provides an automatic pressure boosting and relieving system of a hydrostatic testing machine. The automatic pressure boosting and relieving system comprises a pressure boosting cylinder, high-pressure water path control valves, a flash water pump, a pipeline and a control part. The pressure boosting cylinder provides high-pressure water, automatic pressure boosting, pressure maintaining and pressure relieving of the system are achieved through the sequential action of the high-pressure water path control valves, the degree of pressure is detected through a pressure transmitter, a main controller controls the pressure to be increased to set pressure, and working is stopped after pressure is maintained and relieved. The high-pressure water path control valves all adopt pilot-operated type hydraulic control one-way valves, and therefore the safety and stability of the system are improved; hydraulic pressure and water paths adopt modularization and integration design, so that the corresponding relation between the control part and an actuating mechanism is very clear; the main controller adopts a programmable logic controller, so that the performance of a control system is greatly improved. The automatic pressure boosting and relieving system of the hydrostatic testing machine is high in reliability, good in anti-disturbance performance, high in degree of automation, capable of greatly improving production efficiency and saving labor cost, high in elasticity in the control process, and good in adaptability.
Description
Technical field
The utility model belongs to hydrostatic test equipment technical field, relates to a kind of supercharging depressurized system, is specifically related to a kind of water purification pressure testing machine Automatic-boosting, depressurized system that boiler steel pipe, petroleum oil well pipe, line pipe etc. is carried out pressure test.
Background technique
The tradition water purification presses the testing machine pressurization system extensively to adopt the supercharging device superchargings such as three cylinder compression pumps, hydraulic test pump, and pressure is low, it is slow to boost, pressure surge is large, high tension loop is complicated; Release needs manually, and is wayward, and maintenance work simultaneously is complicated, and difficulty is large.
Summary of the invention
The purpose of this utility model is to provide a kind of pressure (high pressure, ultrahigh pressure) of test determination that automatically boosts to fast, stably can solve hydrostatic testing machine tested steel pipe is carried out hydrostatics testing the time, carry out pressurize, automatic pressure-relieving, and then guarantee Automatic-boosting, depressurized system that hydrostatic testing machine effectively carries out the hydrostatic test.
for achieving the above object, the technological scheme that the utility model adopts is: a kind of hydrostatic testing machine Automatic-boosting, depressurized system, comprise pressurized cylinder, the high pressure water circuit control valve, flush water pump, pipeline and control section, pressurized cylinder comprises four directional posts that vertically arrange, directional post is provided with bearing plate from top to down successively, lifting board and positioning plate, bearing plate is affixed with the barrel-shaped plunger upper end that vertically arranges, the plunger lower end passes successively lifting board and positioning plate stretches in the first fluid cylinder, the first fluid cylinder is fixedly connected with lifting board, the first fluid cylinder is positioned at the second fluid cylinder, the second fluid cylinder is fixedly connected with positioning plate, the first fluid cylinder can move back and forth up and down along the second fluid cylinder inwall, two backhaul standard cylinders are installed on positioning plate, the piston rod of two backhaul standard cylinders is fixedly connected with lifting board, the first fluid cylinder and two backhaul standard cylinders jointly drive lifting board and move back and forth up and down, the high pressure water circuit control valve comprises the first Pilot operated check valve, the second Pilot operated check valve, shuttle valve, the first one-way valve, the second one-way valve, the 3rd Pilot operated check valve, the 4th Pilot operated check valve and the 3rd one-way valve that is integrated on high pressure water circuit valve platform, plunger is connected with high pressure water circuit valve platform, the liquid outlet of the liquid entering hole of the 3rd Pilot operated check valve, the 4th Pilot operated check valve, the 3rd one-way valve all is connected with plunger, the liquid outlet of the 4th Pilot operated check valve is connected with the liquid entering hole of the second one-way valve, and the liquid outlet of the second one-way valve is connected with high pressure water circuit valve platform, shuttle valve second mouthful, the second pressure transmitter and capstan respectively, the 3rd mouthful of shuttle valve is connected with high pressure water circuit valve platform, the first pressure transmitter and closed conduit respectively, the First of shuttle valve is connected with the liquid entering hole of the second Pilot operated check valve and the liquid outlet of the first one-way valve respectively, the liquid outlet emptying of the second Pilot operated check valve, and the liquid entering hole of the first one-way valve is connected the liquid outlet of the 3rd Pilot operated check valve, the end that closed conduit is not connected with capstan and the liquid entering hole of the first Pilot operated check valve are communicated with, the liquid outlet emptying of the first Pilot operated check valve, the liquid entering hole of the 3rd one-way valve connects flush water pump,
Control section comprises two-position four-way solenoid valve, the 5th Pilot operated check valve, the first three position four-way electrohy-draulic valve, the second three position four-way electromagnetic valve, the 3rd three position four-way electromagnetic valve, the 4th three position four-way electromagnetic valve, plunger pump, electromagnetic relief valve, the first pressure transmitter, the second pressure transmitter and master controller;
Two-position four-way solenoid valve, the 5th Pilot operated check valve, the first three position four-way electrohy-draulic valve are integrated on the first hydraulic valve platform; The second three position four-way electromagnetic valve, the 3rd three position four-way electromagnetic valve, the 4th three position four-way electromagnetic valve are integrated on the second hydraulic valve platform; The first hydraulic valve platform all is connected by Hydraulic Main, oil returning tube with electromagnetic relief valve, the second pressure gauge and plunger pump with the second hydraulic valve platform; The control oil pipe line of the first Pilot operated check valve, the second Pilot operated check valve, the 3rd Pilot operated check valve, the 4th Pilot operated check valve all is connected with the second hydraulic valve platform; Bottom the second fluid cylinder, hydraulic fluid port, two backhaul standard cylinder working hydraulic fluid ports all are connected with the first hydraulic valve platform;
Two-position four-way solenoid valve, the first three position four-way electrohy-draulic valve, the second three position four-way electromagnetic valve, the 3rd three position four-way electromagnetic valve, the 4th three position four-way electromagnetic valve, electromagnetic relief valve, the first pressure transmitter and the second pressure transmitter all are connected by cable with master controller.
The characteristics of the utility model Automatic-boosting, depressurized system: pressurized cylinder novel structure, compactness, rationally distributed, specific pressure is high, capacity is large, boosts quick, steady; The high pressure water circuit control valve all adopts leading hydraulic control one-way valve, drives valve, impacts littlely when closing valve, has improved Security of the system, stationarity; Modularization, Integration Design have all been adopted in hydraulic pressure, water route, thus make the control section of system and the corresponding relation between actuator very clear and definite; Master controller adopts programmable controller, has greatly improved the performance of control system, makes system have very high reliability, interference free performance is fine, and especially automaticity is high, greatly enhances productivity, save labour cost, control procedure elasticity is high, and adaptability is very strong.
Description of drawings
Fig. 1 is the schematic diagram of the utility model Automatic-boosting, depressurized system.
Fig. 2 is the control flow chart of the utility model Automatic-boosting, depressurized system.
in figure: 1. the first Pilot operated check valve, 2. pressure testing steel pipe, 3. the second Pilot operated check valve, 4. shuttle valve, 5. the first one-way valve, 6. the second one-way valve, 7. pressure gauge, 8. the first pressure transmitter, 9. the second pressure transmitter, 10. the 3rd Pilot operated check valve, 11. the 4th Pilot operated check valve, 12. the 3rd one-way valve, 13. backhaul standard cylinder, 14. the second fluid cylinder, 15. plunger, 16. the first fluid cylinder, 17. lifting board, 18. flush water pump, 19. two-position four-way solenoid valve, 20. electromagnetic relief valve, 21. the 5th Pilot operated check valve, 22. plunger pump, 23. the first three position four-way electrohy-draulic valve, 24. the second three position four-way electromagnetic valve, 25. the 3rd three position four-way electromagnetic valve, 26. the 4th three position four-way electromagnetic valve, 27. the second pressure gauge, 28. positioning plate, 29. the first hydraulic valve platform, 30. the second hydraulic valve platform, 31. high pressure water circuit valve platform, 32. bearing plate, 33. directional post.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
as shown in Figure 1, the utility model Automatic-boosting, depressurized system comprise pressurized cylinder, high pressure water circuit control valve, flush water pump 18, pipeline and control section, pressurized cylinder comprises the bearing plate 32 that sets gradually from top to down, lifting board 17 and positioning plate 28, bearing plate 32 is fixedly connected with four directional post 33 upper ends that vertically arrange, positioning plate 28 is fixedly connected with four directional post 33 lower ends that vertically arrange, lifting board 17 is sleeved on four directional posts 33, bearing plate 32 is affixed with plunger 15 upper ends that vertically arrange, plunger 15 lower ends pass successively lifting board 17 and positioning plate 28 stretches in the first fluid cylinder 16, the first fluid cylinder 16 is fixedly connected with lifting board 17, the first fluid cylinder 16 is positioned at the second fluid cylinder 14, the second fluid cylinder 14 is fixedly connected with positioning plate 28, the first fluid cylinder 16 can move back and forth up and down along the second fluid cylinder 14 inwalls, two backhaul standard cylinders 13 are installed on positioning plate 28, the piston rod of these two backhaul standard cylinders 13 is fixedly connected with lifting board 17, the first fluid cylinder 16 and two common lifting boards 17 that drive of backhaul standard cylinder 13 move back and forth up and down, plunger 15 is barrel-shaped.The high pressure water circuit control valve comprises the first Pilot operated check valve 1, the second Pilot operated check valve 3, shuttle valve 4, the first one-way valve 5, the second one-way valve 6, the 3rd Pilot operated check valve 10, the 4th Pilot operated check valve 11 and the 3rd one-way valve 12 that is integrated on high pressure water circuit valve platform 31.Control section comprises two-position four-way solenoid valve 19, the 5th Pilot operated check valve 21, the first three position four-way electrohy-draulic valve 23, the second three position four-way electromagnetic valve 24, the 3rd three position four-way electromagnetic valve 25, the 4th three position four-way electromagnetic valve 26, plunger pump 22, electromagnetic relief valve 20, the first pressure transmitter 8, the second pressure transmitter 9 and master controller; The pressure of hydraulic system is set up by electromagnetic relief valve 20, is shown by the second pressure gauge 27; The pressure of high pressure water detects by the first pressure transmitter 8, the second pressure transmitter 9 by HYDRAULIC CONTROL SYSTEM, is shown by the first pressure gauge 7; The pressure ratio of supercharging device is decided by the diameter of backhaul standard cylinder 13, the diameter of the first fluid cylinder 16 and the diameter of plunger 15.
Two-position four-way solenoid valve 19, the 5th Pilot operated check valve 21, the first three position four-way electrohy-draulic valve 23 are integrated on the first hydraulic valve platform 29; The second three position four-way electromagnetic valve 24, the 3rd three position four-way electromagnetic valve 25, the 4th three position four-way electromagnetic valve 26 are integrated on the second hydraulic valve platform 30; The first hydraulic valve platform 29, the second hydraulic valve platform 30 all are connected by pipeline with electromagnetic relief valve 20, the second pressure gauge 27, plunger pump 22; The control oil pipe line of the first Pilot operated check valve 1, the second Pilot operated check valve 3, the 3rd Pilot operated check valve 10, the 4th Pilot operated check valve 11 all is connected by pipeline with the second hydraulic valve platform 30; The second fluid cylinder 14 bottom hydraulic fluid ports, two backhaul standard cylinder 13 actuator ports all are connected by pipeline with the first hydraulic valve platform 29.
The first Pilot operated check valve 1 is connected with the 4th three position four-way electromagnetic valve 26; The second Pilot operated check valve 3 is connected with the 3rd three position four-way electromagnetic valve 25; The 3rd Pilot operated check valve 10 all is connected with the second three position four-way electromagnetic valve 24 with the 4th Pilot operated check valve 11; The first hydraulic fluid port of the first three position four-way electromagnetic valve 23 is connected with 13 1 liquid mouths of two backhaul standard cylinders respectively, and the second hydraulic fluid port of the first three position four-way electromagnetic valve 23 is connected with the liquid entering hole of the first fluid cylinder 16, the liquid entering hole of the 5th Pilot operated check valve 21 and another liquid mouth of two backhaul standard cylinders 13 respectively.The first hydraulic valve platform 29 all is connected by Hydraulic Main, oil returning tube with electromagnetic relief valve 20, the second pressure gauge 27 and plunger pump 22 with the second hydraulic valve platform 30; The control oil pipe line of the first Pilot operated check valve 1, the second Pilot operated check valve 3, the 3rd Pilot operated check valve 10, the 4th Pilot operated check valve 11 all is connected with hydraulic valve platform 30; The second fluid cylinder 14 bottom hydraulic fluid ports, two backhaul standard cylinder 13 actuator ports all are connected with hydraulic valve platform 29;
Two-position four-way solenoid valve 19, the first three position four-way electrohy-draulic valve 23, the second three position four-way electromagnetic valve 24, the 3rd three position four-way electromagnetic valve 25, the 4th three position four-way electromagnetic valve 26, electromagnetic relief valve 20, the first pressure transmitter 8 and the second pressure transmitter 9 all are connected with master controller by control cables.
When passing into, kicker cylinder standard fluid cylinder 13 and the second fluid cylinder 14 push on hydraulic oil with pressure when drawing, the first fluid cylinder 16 can be along the second fluid cylinder 14 inwalls, slide up and down along plunger 15 outer walls, lifting board 17 slides up and down along directional post 33, directional post 33 play the guiding role, and the card phenomenon very steadily and not occurs spraining when guaranteeing that the first fluid cylinder 16 slides; Meanwhile, on when pushing away plunger 15 discharge high pressure waters, when drop-down, flush water pump 18 is to plunger 15, the first interior injection low-pressure water of fluid cylinder 16.The effective length of directional post 33 is consistent with the stroke of backhaul standard cylinder 13, to avoid lifting board 17 and bearing plate 32 to clash into mutually or 17 liters of capacity that reduce high pressure water less than the top of lifting board, the pressure ratio of pressurized cylinder is decided by the diameter of backhaul standard cylinder 13, the first fluid cylinder 16, plunger 15; The pressure of hydraulic system is set up by electromagnetic relief valve 20, is shown by the second pressure gauge 27, and the pressure of high pressure water is controlled by hydraulic system, and the pressure of high pressure water detects by the first pressure transmitter 8 and the second pressure transmitter 9, and is shown by the first pressure gauge 7; Two-position four-way solenoid valve 19, the 5th Pilot operated check valve 21, the first three position four-way electrohy-draulic valve 23 are integrated on the first hydraulic valve platform 29; The second three position four-way electromagnetic valve 24, the 3rd three position four-way electromagnetic valve 25, the 4th three position four-way electromagnetic valve 26 are integrated in the second hydraulic valve platform 2(30) on; The first hydraulic valve platform 29 is connected with electromagnetic relief valve 20, the second pressure gauge 27, plunger pump 22 by pipeline, and the second hydraulic valve platform 30 also is connected with electromagnetic relief valve 20, the second pressure gauge 27, plunger pump 22 by pipeline; The control oil pipe line of the first Pilot operated check valve 1, the second Pilot operated check valve 3, the 3rd Pilot operated check valve 10, the 4th Pilot operated check valve 11 all with the second hydraulic valve platform 30 on corresponding actuator port be connected.The second fluid cylinder 14 bottom hydraulic fluid ports, two backhaul standard cylinder 13 actuator ports all with the first hydraulic valve platform 29 on corresponding actuator port be connected by pipeline; Two-position four-way solenoid valve 19, the first three position four-way electrohy-draulic valve 23, the second three position four-way electromagnetic valve 24, the 3rd three position four-way electromagnetic valve 25, the 4th three position four-way electromagnetic valve 26, electromagnetic relief valve 20, the first pressure transmitter 8 and the second pressure transmitter 9 all are connected by control cables with master controller; Plunger 15 is connected by pipeline with high pressure water circuit valve platform 31, the 3rd Pilot operated check valve 10 is connected with the first one-way valve 5, the first one-way valve 5 is connected with the second Pilot operated check valve 3, the second Pilot operated check valve 3 is connected with the First of shuttle valve 4, the 4th Pilot operated check valve 11 is connected with the second one-way valve 6, the second one-way valve 6 is connected with capstan with second mouthful of shuttle valve 4 respectively, and capstan is provided with the first pressure gauge 7; Native system the 3rd Pilot operated check valve 10 is opposite with the action of the 4th Pilot operated check valve 11, when the 3rd Pilot operated check valve 10 is opened, the pressure seal ring that can feed water gives sealing pressing, and when the 4th Pilot operated check valve 11 was opened, can feed water pressure seal ring and pressure testing steel pipe 2 pressurizeed simultaneously; When the first Pilot operated check valve 1 is opened, can lay down the pressure of pressure testing steel duct, when the second Pilot operated check valve 3 is opened, can lay down the pressure of seal ring, the first one-way valve 5 is used for keeping water-pressure sealed circle pressure, and the second one-way valve 6 is used for keeping pressure testing steel pipe pressure, and the first pressure transmitter 8 is for detection of the pressure of water-pressure sealed circle, the second pressure transmitter 9 is for detection of the pressure of pressure testing steel pipe 2, and the first pressure gauge 7 can show the force value of pressure testing steel pipe 2 at any time.
when carrying out work pressure test, the control flow chart of native system, as shown in Figure 2, at first start plunger pump 22, then select manual/auto switch, press loop start under automated manner, at first DT4, DT7, the DT10 energising, the 3rd Pilot operated check valve 10 is opened, the 4th Pilot operated check valve 11, the second Pilot operated check valve 3 is closed, opening valve time is to rear DT2, the DT10 energising, the pressurized cylinder movement parts rises and pressurizes, along with pressure increases, the First of shuttle valve 4 and the 3rd mouthful of connection, close for second mouthful of shuttle valve 4, high pressure water enters and gives closed conduit, the water-pressure sealed circle gives sealing, when the first pressure transmitter 8 detects sealing load P1 and reaches setting pressure, master controller instruction DT2, the DT10 outage, the pressurized cylinder movement parts stops the pressurization of rising, the low pressure waterway system begins to pressure testing steel pipe 2 perfusion (infusion time can be set by man-machine interface) low-pressure water, DT5 after perfusion is completed, DT9, the DT10 energising, the 4th Pilot operated check valve 11 is opened, the 3rd Pilot operated check valve 10 is closed, the first Pilot operated check valve 1 is closed, DT2, the DT10 action, the pressurized cylinder movement parts rises and pressurizes, along with being increased to, pressure gives sealing load, second mouthful and the 3rd mouthful of connection of shuttle valve 4, the First of shuttle valve 4 is closed, high pressure water enters simultaneously and gives closed conduit and capstan, when pressure being detected and reach steel pipe setting pressure P2 Deng the second pressure transmitter 9, master controller instruction DT2, the DT10 outage, the pressurized cylinder Self-pressurizing agri is completed, system enters packing state, DT1 meanwhile, DT3, the DT10 energising, the pressurized cylinder movement parts descends, flush water pump 18 is full of low-pressure water to pressurized cylinder.After (dwell time can be set by man-machine interface) completed in pressurize, DT8, DT10 energising, the first Pilot operated check valve 1 is opened, after the second pressure transmitter 9 detects pressure P 2 and pressure-reliefs to zero, DT6, DT10 energising, the second Pilot operated check valve 3 is opened, after pressure P 1 being detected and pressure-relief to zero Deng the first pressure transmitter 8, DT7, DT10 energising, the second Pilot operated check valve 3 is closed, and release work is completed.
Claims (3)
1. hydrostatic testing machine Automatic-boosting, depressurized system, it is characterized in that, comprise pressurized cylinder, the high pressure water circuit control valve, flush water pump (18), pipeline and control section, pressurized cylinder comprises four directional posts (33) that vertically arrange, directional post (33) is provided with bearing plate (32) from top to down successively, lifting board (17) and positioning plate (28), bearing plate (32) is affixed with barrel-shaped plunger (15) upper end that vertically arranges, plunger (15) lower end passes successively lifting board (17) and positioning plate (28) stretches in the first fluid cylinder (16), the first fluid cylinder (16) is fixedly connected with lifting board (17), the first fluid cylinder (16) is positioned at the second fluid cylinder (14), the second fluid cylinder (14) is fixedly connected with positioning plate (28), the first fluid cylinder (16) can move back and forth up and down along the second fluid cylinder (14) inwall, two backhaul standard cylinders (13) are installed on positioning plate (28), the piston rod of two backhaul standard cylinders (13) is fixedly connected with lifting board (17), the first fluid cylinder (16) and two backhaul standard cylinders (13) jointly drive lifting board (17) and move back and forth up and down, the high pressure water circuit control valve comprises the first Pilot operated check valve (1), the second Pilot operated check valve (3), shuttle valve (4), the first one-way valve (5), the second one-way valve (6), the 3rd Pilot operated check valve (10), the 4th Pilot operated check valve (11) and the 3rd one-way valve (12) that is integrated on high pressure water circuit valve platform (31), plunger (15) is connected with high pressure water circuit valve platform (31), the liquid outlet of the liquid entering hole of the 3rd Pilot operated check valve (10), the 4th Pilot operated check valve (11), the 3rd one-way valve (12) all is connected with plunger (15), the liquid outlet of the 4th Pilot operated check valve (11) is connected with the liquid entering hole of the second one-way valve (6), and the liquid outlet of the second one-way valve (6) is connected with high pressure water circuit valve platform (31), shuttle valve (4) second mouthful, the second pressure transmitter (9) and capstan respectively, the 3rd mouthful of shuttle valve (4) is connected with high pressure water circuit valve platform (31), the first pressure transmitter (8) and closed conduit respectively, the First of shuttle valve (4) is connected with the liquid entering hole of the second Pilot operated check valve (3) and the liquid outlet of the first one-way valve (5) respectively, the liquid outlet emptying of the second Pilot operated check valve (3), the liquid entering hole of the first one-way valve (5) is connected the liquid outlet of the 3rd Pilot operated check valve (10), the liquid entering hole of the end that closed conduit is not connected with capstan and the first Pilot operated check valve (1) is communicated with, the liquid outlet emptying of the first Pilot operated check valve (1), the liquid entering hole of the 3rd one-way valve (12) connects flush water pump (18),
Control section comprises two-position four-way solenoid valve (19), the 5th Pilot operated check valve (21), the first three position four-way electrohy-draulic valve (23), the second three position four-way electromagnetic valve (24), the 3rd three position four-way electromagnetic valve (25), the 4th three position four-way electromagnetic valve (26), plunger pump (22), electromagnetic relief valve (20), the first pressure transmitter (8), the second pressure transmitter (9) and master controller;
Two-position four-way solenoid valve (19), the 5th Pilot operated check valve (21), the first three position four-way electrohy-draulic valve (23) are integrated on the first hydraulic valve platform (29); The second three position four-way electromagnetic valve (24), the 3rd three position four-way electromagnetic valve (25), the 4th three position four-way electromagnetic valve (26) are integrated on the second hydraulic valve platform (30); The first hydraulic valve platform (29) all is connected by Hydraulic Main, oil returning tube with electromagnetic relief valve (20), the second pressure gauge (27) and plunger pump (22) with the second hydraulic valve platform (30); The control oil pipe line of the first Pilot operated check valve (1), the second Pilot operated check valve (3), the 3rd Pilot operated check valve (10), the 4th Pilot operated check valve (11) all is connected with the second hydraulic valve platform (30); The second fluid cylinder (14) bottom hydraulic fluid port, two backhaul standard cylinders (13) actuator port all are connected with the first hydraulic valve platform (29);
Two-position four-way solenoid valve (19), the first three position four-way electrohy-draulic valve (23), the second three position four-way electromagnetic valve (24), the 3rd three position four-way electromagnetic valve (25), the 4th three position four-way electromagnetic valve (26), electromagnetic relief valve (20), the first pressure transmitter (8) and the second pressure transmitter (9) all are connected by cable with master controller.
2. hydrostatic testing machine Automatic-boosting according to claim 1, depressurized system, is characterized in that, the pressure ratio of described pressurized cylinder is determined by the diameter of backhaul standard cylinder (13), the diameter of the first fluid cylinder (16) and the diameter of plunger (15).
3. hydrostatic testing machine Automatic-boosting according to claim 1, depressurized system, is characterized in that, the oil circuit control of described the first Pilot operated check valve (1) is connected with the 4th three position four-way electromagnetic valve (26); The oil circuit control of the second Pilot operated check valve (3) is connected with the 3rd three position four-way electromagnetic valve (25); The oil circuit control of the 3rd Pilot operated check valve (10) and the 4th Pilot operated check valve (11) all is connected with the second three position four-way electromagnetic valve (24); The First of the first three position four-way electrohy-draulic valve (23) is connected with (13) liquid mouths of two backhaul standard cylinders respectively, and second mouthful of the first three position four-way electrohy-draulic valve (23) is connected with the liquid entering hole of the first fluid cylinder (16), the liquid entering hole of the 5th Pilot operated check valve (21) and another liquid mouth of two backhaul standard cylinders (13) respectively; The oil circuit control of the 5th Pilot operated check valve (21) is connected with two-position four-way solenoid valve (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320278430 CN203272274U (en) | 2013-05-21 | 2013-05-21 | Automatic pressure boosting and relieving system of hydrostatic testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320278430 CN203272274U (en) | 2013-05-21 | 2013-05-21 | Automatic pressure boosting and relieving system of hydrostatic testing machine |
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| Publication Number | Publication Date |
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| CN203272274U true CN203272274U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320278430 Expired - Fee Related CN203272274U (en) | 2013-05-21 | 2013-05-21 | Automatic pressure boosting and relieving system of hydrostatic testing machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034577A (en) * | 2014-05-13 | 2014-09-10 | 赵江霞 | Partial one-way dynamic unloading device in hydrostatic pressure state |
| CN106039624A (en) * | 2016-07-26 | 2016-10-26 | 江苏建筑职业技术学院 | Unpowered fire engine water pipe water testing device |
| CN107061377A (en) * | 2017-03-30 | 2017-08-18 | 徐州工业职业技术学院 | A kind of heavy duty lifting electrohydraulic control system |
| CN110220809A (en) * | 2019-05-16 | 2019-09-10 | 浙江大学 | A kind of hydrogen feeding pipe road military service performance testing device and test method |
| CN112484915A (en) * | 2020-11-18 | 2021-03-12 | 山东厚德测控技术股份有限公司 | Water meter detection pressurization system and method |
-
2013
- 2013-05-21 CN CN 201320278430 patent/CN203272274U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034577A (en) * | 2014-05-13 | 2014-09-10 | 赵江霞 | Partial one-way dynamic unloading device in hydrostatic pressure state |
| CN104034577B (en) * | 2014-05-13 | 2016-08-24 | 赵江霞 | The unidirectional dynamic offloading device in local under hydrostatic pressure state |
| CN106039624A (en) * | 2016-07-26 | 2016-10-26 | 江苏建筑职业技术学院 | Unpowered fire engine water pipe water testing device |
| CN107061377A (en) * | 2017-03-30 | 2017-08-18 | 徐州工业职业技术学院 | A kind of heavy duty lifting electrohydraulic control system |
| CN107061377B (en) * | 2017-03-30 | 2018-07-17 | 徐州工业职业技术学院 | A kind of heavy duty lifting electrohydraulic control system |
| CN110220809A (en) * | 2019-05-16 | 2019-09-10 | 浙江大学 | A kind of hydrogen feeding pipe road military service performance testing device and test method |
| CN112484915A (en) * | 2020-11-18 | 2021-03-12 | 山东厚德测控技术股份有限公司 | Water meter detection pressurization system and method |
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