CN214844518U

CN214844518U - Pressure relief and drainage loop of hydrostatic testing machine

Info

Publication number: CN214844518U
Application number: CN202121189461.XU
Authority: CN
Inventors: 马增新; 武文豪; 史辉桃
Original assignee: Shanxi Mutual Rise Technology Co ltd
Current assignee: Shanxi Mutual Rise Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-23
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to a hydrostatic testing machine pressure release drainage return circuit. The utility model discloses a hydraulic press and the high pressure off-load valve of connecting the hydraulic press, the hydraulic press sets up the stiff end and removes the end, set up the steel pipe of being tested between stiff end and the removal end, hydraulic press stiff end inner chamber intercommunication sets up high pressure off-load valve, the low pressure fills the water valve, bypass gas accuse valve, the check valve, the hydraulic press removes the high-order intercommunication of end inner chamber and sets up discharge valve, low pressure water supply system is via the check valve, the low pressure fills the water valve and gets into the stiff end inner chamber and carry out the low pressure water supply, the pipeline branch connection bypass gas accuse valve entry that the check valve connects the low pressure and fills the water valve, bypass gas accuse valve export pressure release return water. The high-pressure unloading valve is communicated with the high position of the inner cavity of the fixed end of the hydraulic press. The low-pressure water filling valve is communicated with the inner cavity of the fixed end of the hydraulic press at a low position. The inner chamber of stiff end sets up the water conservancy diversion hole with the steel pipe interface face of being examined, and the water conservancy diversion downthehole fixed rubber hose of the type of falling U, beneficial effect: after the pressure test is finished, the water is quickly drained, and the arrangement position of the steel pipe to be tested is not influenced.

Description

Pressure relief and drainage loop of hydrostatic testing machine

Technical Field

The utility model belongs to the technical field of the hydraulic press drainage, specifically a hydrostatic testing machine pressure release drainage return circuit.

Background

After the large-scale pipeline hydrostatic testing machine accomplished the pipeline pressure testing, need carry out the drainage to the pipeline, the sealed terminal surface through opening the pipeline both ends is to present drainage mode, makes the water in the pipeline pour out through the sealed terminal surface of opening, and this kind of drainage method is although simple, nevertheless has some drawbacks at practical application's in-process: for example, the drainage mode is disordered drainage, when sealing surfaces at two ends are opened, a large amount of water in the pipeline can be instantly drained from the two ends of the pipeline, and if the surrounding waterproof measures are not in place, the water can flow across wantonly. In the first half period of drainage, because the water is stored in the pipeline more, the horizontal shooting distance is far away during drainage, as shown in fig. 2, the water can splash onto the pipeline to be tested nearby, and when the pipeline to be tested is subjected to on-line testing, which is wetted by water, the situation that whether the test leaks or not cannot be observed and judged by testers is easily caused. Therefore, under the background, a novel ordered drainage process after the test needs to be researched and designed. The water in the pipeline can be discharged in a controllable and orderly manner after the test is finished, and the problems generated in the water discharging process are solved.

Disclosure of Invention

The utility model discloses a problem of orderly drainage after hydraulic press is experimental, invent a hydrostatic test machine pressure release drainage return circuit.

The utility model adopts the following technical proposal:

a pressure relief and drainage loop of a hydrostatic testing machine comprises a hydrostatic machine and a high-pressure unloading valve connected with the hydrostatic machine, wherein the hydrostatic machine is provided with a fixed end and a movable end, a tested steel pipe is arranged between the fixed end and the movable end, an inner cavity of the fixed end of the hydrostatic machine is communicated with the high-pressure unloading valve, a low-pressure water filling valve, a bypass pneumatic control valve and a one-way valve, the movable end of the hydrostatic machine is communicated with an exhaust valve, a low-pressure water supply system enters the inner cavity of the fixed end through the one-way valve and the low-pressure water filling valve to supply water at low pressure, a pipeline branch of the one-way valve connected with the low-pressure water filling valve is connected with an inlet of the bypass pneumatic control valve, and an outlet of the bypass pneumatic control valve is used for pressure relief and water return. The high-pressure unloading valve is communicated with the high position of the inner cavity of the fixed end of the hydraulic press. The low-pressure water filling valve is communicated with the inner cavity of the fixed end of the hydraulic press at a low position. The exhaust valve is communicated with the high position of the inner cavity of the movable end of the hydraulic press. The bypass pneumatic control valve and the low-pressure water filling valve are arranged at the lower positions lower than the inner cavity of the fixed end. The inner cavity of the fixed end and the interface surface of the tested steel pipe are provided with a flow guide hole, the flow guide hole is provided with a pipe clamp, and the pipe clamp is fixed with an inverted U-shaped rubber hose.

Compared with the prior art, the utility model discloses can obtain following technological effect: the purpose of rapid drainage after pressure test is finished can be achieved, the arrangement position of the steel pipe to be tested is not influenced, and the rhythm is compact;

the utility model provides a after experimental completion, drawback such as unordered, the plain jet of drainage in-process rivers splashes prevents to influence the surface of waiting to try the station pipe fitting to cause the unable judgement test result of experimenter. This optimal design drainage return circuit, it is more orderly, controllable, improved production efficiency.

Drawings

FIG. 1 is a schematic view of the principle and connection components of the present invention;

fig. 2 is a schematic diagram of water flow disordered and horizontal jet splashing drainage after the hydraulic press test is finished.

Wherein, the device comprises a check valve 1, a bypass pneumatic control valve 2, a low-pressure water filling valve 3, a high-pressure unloading valve 4, an exhaust valve 5, a steel pipe 6 to be tested, a fixed end 7, a movable end 8, a rubber hose 9 and a pipe clamp 10.

Detailed Description

As shown in fig. 1, a pressure relief and drainage loop of a hydrostatic testing machine comprises a hydrostatic machine provided with a fixed end 7 and a movable end 8, a high-pressure unloading valve 4, a low-pressure water filling valve 3, a bypass pneumatic control valve 2 and a one-way valve 1 are communicated with an inner cavity of the fixed end of the hydrostatic machine, an exhaust valve 5 is communicated with the movable end 8 of the hydrostatic machine, a tested steel pipe 6 is arranged between the fixed end 7 and the movable end 8, a low-pressure water supply system enters the inner cavity of the fixed end through the one-way valve 1 and the low-pressure water filling valve 3 to supply water at low pressure, a pipeline branch of the one-way valve 1 connected with the low-pressure water filling valve 3 is connected with an inlet of the bypass pneumatic control valve 2, and an outlet of the bypass pneumatic control valve 2 releases pressure and returns water.

Preferably, the high-pressure unloading valve 4 is communicated with the high position of the inner cavity of the fixed end of the hydraulic press.

Preferably, the low-pressure water filling valve 3 is communicated with the lower position of the inner cavity of the fixed end of the hydraulic press.

Preferably, the exhaust valve 5 is communicated with the high position of the inner cavity of the movable end 8 of the hydraulic press.

The bypass pneumatic control valve and the low-pressure water filling valve are arranged at the lower positions lower than the inner cavity of the fixed end.

The interface of the inner cavity of the fixed end 7 and the tested steel pipe 6 is provided with a flow guide hole, the flow guide hole is provided with a pipe clamp 10, and the pipe clamp 10 is fixed with an inverted U-shaped rubber hose 9.

As in fig. 1, the process operation is carried out:

the P1 port is connected into a low-pressure water supply system and enters the inner cavity of the fixed end 7 through the check valve 1 and the low-pressure water filling valve 3 to supply low-pressure water, the low-pressure water filling valve 3 is opened in the water filling process, the low-pressure water filling valve 3 is closed after the water is filled, pressure testing is started, and the low-pressure water supply stops supplying water at the moment.

The P2 port is connected with high pressure to the inner cavity of the fixed end 7 for pressure maintaining, the bypass pneumatic control valve 2 can be opened or closed according to the on-site rhythm in the pressure maintaining process, and other valves such as the low-pressure water filling valve 3, the high-pressure unloading valve 4 and the exhaust valve 5 are all closed. And after pressure maintaining is finished, opening the high-pressure unloading valve 4 for pressure relief, opening the exhaust valve 5 for exhaust and/or drainage when the pressure is reduced to a certain safety value, and opening the low-pressure water filling valve 3 and the bypass air control valve 2 for drainage when the water pressure is zero.

In the drainage process, be less than the water in water conservancy diversion hole in the steel pipe 6 of being examined, the inner chamber bottom through the 9 siphons of the rubber hose of the type of falling U to stiff end 7 is arranged outward, further reduces the residual water yield in the steel pipe 6 of being examined, carries out the back of drainage through this kind of mode, and the water pressure water level greatly reduced in the steel pipe 6 of being examined treats the influence of splashing of experimenting the station and greatly improves, can arrange the compacter of production line, improves production efficiency.

Claims

1. The utility model provides a hydrostatic testing machine pressure release drainage return circuit, includes hydraulic press and high pressure unloading valve (4) of connecting the hydraulic press, and the hydraulic press sets up stiff end (7) and removes end (8), set up between stiff end (7) and the removal end (8) and be tried steel pipe (6), its characterized in that: the hydraulic press is characterized in that a high-pressure unloading valve (4), a low-pressure water filling valve (3), a bypass pneumatic control valve (2) and a one-way valve (1) are communicated and arranged in an inner cavity of a fixed end of the hydraulic press, an exhaust valve (5) is communicated and arranged at a movable end (8) of the hydraulic press, a low-pressure water supply system enters the inner cavity of the fixed end through the one-way valve (1) and the low-pressure water filling valve (3) to supply water at low pressure, a pipeline branch of the one-way valve (1) connected with the low-pressure water filling valve (3) is connected with an inlet of the bypass pneumatic control valve (2), and an outlet of the bypass pneumatic control valve (2) is decompressed and backwashed.

2. The hydrostatic testing machine pressure relief and drainage loop of claim 1, wherein: the high-pressure unloading valve (4) is communicated with the high position of the inner cavity of the fixed end of the hydraulic press.

3. The hydrostatic testing machine pressure relief and drainage loop of claim 1, wherein: the low-pressure water filling valve (3) is communicated with the low position of the inner cavity of the fixed end of the hydraulic press.

4. The hydrostatic testing machine pressure relief and drainage loop of claim 1, wherein: the exhaust valve (5) is communicated with the high position of the inner cavity of the movable end (8) of the hydraulic press.

5. The hydrostatic testing machine pressure relief and drainage loop of claim 1, wherein: the bypass pneumatic control valve (2) and the low-pressure water filling valve (3) are arranged at a position lower than the lower position of the inner cavity of the fixed end.

6. The hydrostatic testing machine pressure relief and drainage loop of claim 1, wherein: the inner cavity of the fixed end (7) and the interface surface of the tested steel pipe (6) are provided with a flow guide hole, the flow guide hole is provided with a pipe clamp (10), and the pipe clamp (10) is fixed with an inverted U-shaped rubber hose (9).