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A pressure control system and method capable of bidirectional flow of pressure test medium

A technology of pressure control and two-way flow, which is applied in the direction of fluid pressure control, control/regulation system, non-electric variable control, etc. It can solve the problem that there is no system pressure, the pressure control accuracy is difficult to improve, and the boost rate is difficult to achieve accurate control and other problems, to achieve the effect of ensuring stable boosting, increasing water outlet cutoff, and precisely controlling pressure

Active Publication Date: 2017-02-01
四川杰特机器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pressure control system and method in which the pressure test medium can flow in both directions in view of the above-mentioned problems, mainly to solve the technical problem that it is difficult to accurately control the boosting rate in the prior art; The existing technology cannot realize effective control of the depressurization process, and cannot complete the step-down depressurization control technology problem after depressurization and pressure maintenance; it also solves the problem of the prior art when the pressure is maintained, because the medium cannot flow in the opposite direction, and only has one-way compensation. It does not have the technical problem of reducing the pressure to keep the system pressure constant; it also solves the technical problem that it is difficult to improve the pressure control accuracy in the existing technology

Method used

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  • A pressure control system and method capable of bidirectional flow of pressure test medium
  • A pressure control system and method capable of bidirectional flow of pressure test medium
  • A pressure control system and method capable of bidirectional flow of pressure test medium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 2 As shown, the pressure control system in which the pressure test medium of the present invention can flow bidirectionally is connected with at least one pressure control pipeline between the tested container and the water tank 28, and the pressure control pipeline includes a plunger cavity, a liquid inlet pipe and a liquid outlet Pipe, the plunger chamber is equipped with a plunger 22, the plunger chamber is connected to the tested container through the outlet pipe, and the outlet pipe is provided with a water outlet valve 23; the plunger chamber is passed through the inlet The liquid pipe is connected to the water tank 28, and the liquid inlet pipe is provided with a water inlet shut-off valve 27;

[0057] The control method of the pressure control system in which the pressure test medium can flow in both directions of the present invention includes a pressure boost control process, a pressure maintenance control process and a pressure reduction contr...

Embodiment 2

[0062] Such as figure 2 As shown, Embodiment 2 is similar to Embodiment 1. On the basis of Embodiment 1, the pressure monitoring in the entire system is detected by sensors, and when the sensor detects the corresponding pressure value, the corresponding signal is transmitted to the controller. , the controller controls the shut-off valve and the plunger according to the preset program to realize the automatic operation of the entire control. Specifically, the plunger chamber pressure sensor 26 is connected to the plunger chamber, and the outlet pipe is connected to a pressure sensor 26. A container pressure sensor 24 is provided, and the plunger 22 is provided with a plunger position detection device 21; the plunger cavity pressure sensor 26, the container pressure sensor 24 and the plunger position detection device 21 are connected and transmit signals to the controller, The controller is connected to and controlled by a water inlet shut-off valve 27 , an outlet water shut-o...

Embodiment 3

[0064] Such as image 3 As shown, in the pressure control system of the present invention that the pressure test medium can flow bidirectionally, at least one pressure control pipeline is connected between the tested container and the water tank 28, and the pressure control pipeline includes a plunger chamber and a liquid passage. The liquid-passing pipe connects the tested container with the water tank 28. The liquid-passing pipe is provided with a water outlet shut-off valve 23 and a water inlet shut-off valve 27. The position is connected with a plunger chamber, and the plunger chamber is equipped with a plunger 22; the plunger chamber is connected to the tested container through a liquid outlet pipe, and a water outlet valve is provided at the liquid outlet pipe of the plunger chamber. 30; the plunger chamber is connected to the water tank 28 through the liquid inlet pipe, and the liquid inlet pipe of the plunger chamber is provided with a water inlet valve 29; the unloadi...

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Abstract

The invention discloses a pressure control system and method with a pressure test medium capable of conducting bidirectional flow, and belongs to the technical field of hydraulic tests. The pressure control system comprises a container to be tested and a water tank. At least one pressure control pipeline is connected between the container to be tested and the water tank. Each pressure control pipeline comprises a plunger cavity, a liquid inlet pipe and a liquid outlet pipe. The plunger cavities are internally provided with plungers in a matched mode. The plunger cavities are connected to the container to be tested through the liquid outlet pipes. The liquid outlet pipes are provided with water outlet stop valves. The plunger cavities are connected to the water tank through the liquid inlet pipes, and the liquid inlet pipes are provided with water inlet stop valves. According to the pressure control system and method, the stop valves forced to be opened and closed are utilized to replace water inlet valves and water outlet valves, the plungers are controlled to move through pressure feedback so that the medium can flow forward and reversely, and the purpose that the rate of pressure rise and the rate of pressure reduction can be effectively controlled is achieved; the pressure can be controlled more precisely, and the control accuracy reaches + / -0.02 MPa; automatic pressure supplement or pressure reduction is achieved so as to achieve stable control over the pressure; the technological level of a traditional pressure test technology is broken through.

Description

technical field [0001] The invention relates to the technical field of hydraulic testing, in particular to a pressure control technology that utilizes the two-way flow of the working medium of the plunger pump to effectively control the pressure increase rate and the pressure decrease rate or constant pressure. Background technique [0002] The pressure test technology is to inject the pressure test medium into the tested container by using the high-pressure source generating equipment (abbreviated as the host, hereinafter referred to as the host) to increase the pressure in the pressure test container, so as to test the strength and sealing performance of the pressure test container. . The steps generally include water injection, pressure boost, pressure maintenance, pressure relief and other processes, and its technical requirements meet the standard content of JB / T12013-2014 "Automatic Pressure Test Machine". At present, an electric pressure test pump or a pneumatic pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/02
CPCG05D16/02
Inventor 李文邱富彬石达君陈建魏星曾强吴家洪胡兴元
Owner 四川杰特机器有限公司