High pressure valve life test device

Abstract

The present invention relates to a high-pressure valve life test device, wherein an electrically driven valve to be tested is placed in a high-pressure simulation container, a torque sensor is installed between the valve to be tested and an electric drive head, a strain gauge is installed on the valve body, and the valve to be tested is connected to a valve internal pressure output system for simulating the internal pressure load experienced by the inner wall of the valve body during the opening and closing process of the valve to be tested; the high-pressure simulation container is connected to a valve external pressure output system for simulating the external pressure load experienced by the outer wall of the valve to be tested under deep-sea high-pressure environmental conditions; a signal acquisition, storage and control system is connected to the torque sensor, the strain gauge, the electrically driven valve to be tested, the valve internal pressure output system and the pressure transmitter, and is used to respectively control the automatic opening and closing of the electrically driven valve to be tested, so as to apply internal pressure load, external pressure load and simultaneous internal and external pressure load to the electrically driven valve to be tested, and realize fatigue life test of the electrically driven valve to be tested under dynamic pressure load.

Description

Technical Field

[0001] The invention relates to a deep-sea high-pressure valve testing device, in particular to a high-pressure valve life testing device. Background Art

[0002] At present, a lot of research has been carried out at home and abroad on conventional valve life test technology, and various life test devices or platforms have been designed to form a complete test method for evaluating valve life indicators. In particular, in terms of marine valve life test under static pressure environment conditions, my country has formulated the corresponding test standard CB / T 3397 93 "Marine Valve Static Pressure Life Test". However, there is still a lack of research on high-pressure valve life test technology, especially the life test technology of high-pressure valves under the combined effects of high water pressure, water pressure pulsation and valve cavitation. There is basically no research on high-pressure valve life test technology. So far, there has not been a set of effective test methods for evaluating the life of high-pressure valves, and there is no ready-made test standard for reference, and there is basically no dynamic pressure life test device for high-pressure valves. Summary of the invention

[0003] The purpose of the present invention is to provide a high-pressure valve life test device to solve the problems of the current blank of relevant test devices, the lack of high-pressure valve life test methods and evaluation standards. With this invention, it is possible to carry out high-pressure valve internal pressure and external pressure life tests, realize the automatic operation of high-pressure valve opening and closing, monitor the key performance parameters of the valve in real time, and the measurement data can also be automatically stored and classified. In addition, the high-pressure valve life test device can provide basic and effective data for the reliability life evaluation analysis of high-pressure valves based on degradation data.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a high-pressure valve life test device, including a high-pressure simulation container, a valve internal pressure output system, a valve external pressure output system, a signal acquisition, storage and control system and a gas-liquid pipeline, an electrically driven valve to be tested is placed in the high-pressure simulation container, a torque sensor is installed between the valve to be tested and the electric drive head, which is used to measure the opening and closing torque of the valve; a strain gauge is installed on the valve body of the valve to be tested, which is used to measure the deformation of the valve structure; the valve to be tested is connected to the valve internal pressure output system, which is used to simulate the internal pressure load on the inner wall of the valve body during the opening and closing process of the valve to be tested; the high-pressure simulation container is connected to the valve The external pressure output system of the valve is used to simulate the external pressure load that the outer wall of the tested valve is subjected to under the deep-sea high-pressure environment conditions; the signal acquisition, storage and control system is connected to the torque sensor, the strain gauge, the electrically driven tested valve and the valve internal pressure output system, and the pressure transmitter in the valve external pressure output system is used to control the automatic opening and closing of the electrically driven tested valve respectively, so that the pressure load of the electrically driven tested valve is automatically pressurized and released as required, and the internal pressure load, external pressure load and internal and external pressure load are applied to the electrically driven tested valve at the same time, so as to realize the fatigue life test of the electrically driven tested valve under the action of dynamic pressure load.

[0005] Furthermore, the valve internal pressure output system is composed of a pressure transmitter, a throttle valve, a liquid booster pump, an air source solenoid valve, an air source pressure gauge, an air source regulating valve, a pneumatic water injection pump, a manual pressure relief valve and a pneumatic pressure relief valve. The liquid inlet end of the valve under test is connected to the pressure transmitter through a hydraulic pipeline and then connected to the liquid tank through a liquid booster pump and a pneumatic water injection pump via a filter. The air inlet end of the liquid booster pump is connected to the compressed air inlet through an air source solenoid valve, an air source regulating valve, an air source ball valve and a filter; the air inlet end of the pneumatic water injection pump is connected to the compressed air inlet through an air source solenoid valve, an air source ball valve and a filter; the other way is connected to the liquid tank through a manual pressure relief valve; the liquid outlet end of the valve under test is connected to the pressure transmitter through a hydraulic pipeline, and the pressure transmitter is connected to the liquid tank through a throttle valve.

[0006] Furthermore, the valve external pressure output system is composed of a pressure transmitter, a safety valve, a pneumatic water injection valve, a liquid booster pump, an air source solenoid valve, an air source pressure gauge, and an air source regulating valve. The liquid inlet end of the liquid booster pump is connected to the liquid tank through a filter, and the liquid outlet end is connected to the interior of the high-pressure simulation container through a pressure transmitter and a safety valve. The interior of the high-pressure simulation container is also connected to the liquid tank through a pneumatic water injection valve. The air inlet end of the liquid booster pump is connected to the compressed air inlet through an air source solenoid valve, an air source regulating valve, an air source ball valve, and a filter.

[0007] Furthermore, the signal acquisition, storage and control system is composed of a touch screen, a PLC controller, an acquisition module, and a storage module. The PLC controller is respectively connected to the touch screen, the storage module, and the acquisition module. The storage module is used to realize long-term automatic preprocessing and storage of measurement data, and is connected to a printer to print a test report of the measurement data through the printer.

[0008] Furthermore, the PLC controller has a built-in alarm module for abnormal alarm of inlet and outlet pressure of the tested valve, abnormal alarm of high-pressure simulation container pressure, abnormal alarm of source pressure gauge and abnormal alarm of opening and closing torque of the tested valve.

[0009] Furthermore, the high-pressure simulation container includes a cylinder and an end cover, a pressure relief hole is left at the bottom of the cylinder for discharging the liquid inside the container when the test is completed; the side of the cylinder is an arc structure, and the end cover is provided with a pressure pressurization pipeline interface and five through holes, and the five through holes are respectively used to connect the valve internal pressure input pipeline, the valve internal pressure output pipeline, the valve external pressure input pipeline, the valve external pressure output pipeline and the connection between the valve and its electric drive head.

[0010] Furthermore, the pressure relief hole at the bottom of the high-pressure simulation container is connected to the water tank through a manual drain valve.

[0011] The beneficial effects of the present invention are:

[0012] The present invention is mainly composed of a high-pressure simulation container, a valve internal pressure output system, a valve external pressure output system, a signal acquisition, storage and control system, and a gas-liquid pipeline. The device of the invention can be used to carry out fatigue life tests of high-pressure valves under the action of high pressure inside the valve body, under the action of high pressure on the outer wall of the valve body, and under the action of internal and external pressures at the same time. During the fatigue life test, the signal acquisition, storage and control system in the device can monitor and collect key performance parameters of the high-pressure valve, such as opening and closing torque, inlet and outlet pressures, structural strain, and leakage. The key performance parameter data of the high-pressure valve obtained by collecting and storing can provide basic data for conducting fatigue life assessment of the high-pressure valve.

[0013] The present invention realizes automatic opening and closing of the valve and automatic pressurization and depressurization of the pressure load as required through PLC control; by designing a data storage module, long-term automatic preprocessing and storage of measurement data can be realized; internal pressure loads, external pressure loads and simultaneous internal and external pressure loads can be applied to the high-pressure valve to realize fatigue life testing of the high-pressure valve under dynamic pressure loads; using the life device and various safety alarm devices thereof, unmanned, high-efficiency, long-term and stable operation of the life test process can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A system diagram of a high pressure valve life test device of the present invention;

[0015] In the figure: 1, the electric drive valve under test, 1a, valve, 1b, electric drive head, 1c, torque sensor, 1d, strain gauge, 2, high-pressure simulation container, 2a, manual drain valve, 2b, water tank, 3, signal acquisition, storage and control system; 4, pressure transmitter, 5, safety valve, 6, pneumatic water injection valve, 7, throttle valve, 8, liquid booster pump, 9, air source solenoid valve, 10, air source pressure gauge, 11, air source regulating valve, 12, pneumatic water injection pump, 13, air source ball valve, 14, manual pressure relief valve, 15, pneumatic pressure relief valve, 16, filter, 17, liquid tank, 18, compressed air inlet, wherein the thick solid line represents the high-pressure pipeline, the thin solid line represents the low-pressure pipeline, the thick dashed line represents the air source pipeline, the thin dashed line represents the electrical line, and the dot-dash line represents the pressure relief pipeline;

[0016] Figure 2 It is a structural schematic diagram of a high pressure simulation container;

[0017] Wherein: (a) main cross-sectional view, (b) top view of the end cover;

[0018] 2c is the cylinder, 2d is the end cover, 2e is the fixing bolt, 2f is the pin shaft, 2g is the O-ring, 2h is the valve internal pressure input interface, 2i is the valve internal pressure output interface, 2j is the valve external pressure input interface, 2k is the valve external pressure output interface, and 2l is the valve and electric drive head connection interface. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0020] like Figure 1As shown, a high-pressure valve life test device provided by the present invention comprises a valve to be tested 1, a high-pressure simulation container 2, a valve internal pressure output system, a valve external pressure output system, a signal acquisition, storage and control system 3, and a gas-liquid pipeline. The valve to be tested 1 is an electrically driven valve that can realize automatic opening and closing actions; the valve 1a of the electrically driven valve is placed in the high-pressure simulation container 2, and a torque sensor 1c is installed between the valve 1a of the electrically driven valve and the electric drive head 1b to measure the opening and closing torque of the valve; a strain gauge 1d is installed at a key position of the valve body of the valve 1a to measure the deformation of the valve structure. The valve internal pressure output system is mainly composed of a pressure transmitter 4, a throttle valve 7, a liquid booster pump 8, an air source solenoid valve 9, an air source pressure gauge 10, an air source regulating valve 11, a pneumatic water injection pump 12, a manual pressure relief valve 14, and a pneumatic pressure relief valve 15, etc., which are used to simulate the internal pressure load experienced by the inner wall of the valve body during the opening and closing process of the valve. Among them, the liquid inlet end of the valve 1a is connected to the pressure transmitter 4 through a hydraulic pipeline, and then connected to the liquid tank 17 through the liquid booster pump 8 and the pneumatic water injection pump 12 via the filter 16. The air inlet end of the liquid booster pump 8 is connected to the compressed air inlet 18 through the air source solenoid valve 9, the air source regulating valve 11, the air source ball valve 13, and the filter 16; the air inlet end of the pneumatic water injection pump 12 is connected to the compressed air inlet 18 through the air source solenoid valve 9, the air source ball valve 13, and the filter 16; the other way is connected to the liquid tank 17 through the manual pressure relief valve 14; the liquid outlet end of the valve 1a is connected to the pressure transmitter 4 through a hydraulic pipeline, and the pressure transmitter 4 is connected to the liquid tank 17 through the throttle valve 7.

[0021] The present invention also designs a connecting bracket between the high-pressure valve body and the electric drive head to ensure that the high-pressure valve is sealedly installed on the end cover of the high-pressure container, and to ensure rolling friction between the valve stem and the end cover during the opening and closing process of the high-pressure valve, and to keep the friction surface sealed without leakage.

[0022] The valve external pressure output system is mainly composed of a pressure transmitter 4, a safety valve 5, a pneumatic water injection valve 6, a liquid booster pump 8, an air source solenoid valve 9, an air source pressure gauge 10, an air source regulating valve 11 and other parts and components, which simulate the external pressure load that the outer wall of the valve is subjected to under the deep sea high pressure environment. Among them, the liquid inlet end of the liquid booster pump 8 is connected to the liquid tank 17 through the filter 16, and the liquid outlet end is connected to the inside of the high pressure simulation container 2 through the pressure transmitter 4 and the safety valve 5. The inside of the high pressure simulation container 2 is also connected to the liquid tank 17 through the pneumatic water injection valve 6. The air inlet end of the liquid booster pump 8 is connected to the compressed air inlet 18 through the air source solenoid valve 9, the air source regulating valve 11, the air source ball valve 13, and the filter 16.

[0023] like Figure 2As shown in (a) and (b), the high-pressure simulation container 2 includes a cylinder 2c, an end cover 2d, a fixing bolt 2e, a pin 2f, and an O-ring 2g. The wall thickness of the container should be large enough to ensure that it is safe and reliable during the application of pressure loads. A pressure relief hole is left at the bottom of the cylinder 2c, which is used to discharge the liquid inside the container at the end of the test; the side of the cylinder 2c is an arc structure, and for ease of installation, all pressure pressurization pipeline interfaces are set on the end cover 2d; there are a total of 5 through holes on the end cover 2d, of which hole 2h is used for connecting the valve internal pressure input pipeline, hole 2i is used for connecting the valve internal pressure output pipeline, hole 2j is used for connecting the valve external pressure input pipeline, hole 2k is used for connecting the valve external pressure output pipeline, and hole 2l is used for connecting the valve and its electric drive head. The bottom of the high-pressure simulation container 2 is connected to the water tank 2b through a manual drain valve 2a.

[0024] The signal acquisition, storage and control system 3 is mainly composed of a touch screen, a PLC controller, and acquisition software and hardware. The signal acquisition, storage and control system 3 is connected to three pressure transmitters 4, a torque sensor 1c, and a strain gauge 1d. Before the test, the test pressure, pressure holding time, emptying time and other parameters can be set on the test software according to the test requirements. After the parameter setting is completed, the test can be started with one button. The system automatically completes the entire test process according to the set parameters. No manual intervention is required during the test. After the test, the system automatically releases pressure. During the test, the key performance parameters of the valve such as the inlet and outlet pressure of the valve, the opening and closing torque of the valve, and the structural strain can be measured, and the collected data can be temporarily or long-term stored. During the test, the valve opening and closing frequency can also be set, and the degradation trend data of the key performance parameters of the valve under different opening and closing frequencies (acceleration factors) can be collected, and the degradation characteristics of the key performance parameters can be obtained by statistical analysis, which can provide basic data for establishing a high-pressure valve (acceleration) life test model. The control system software can organize, classify, display and perform basic operations on the test data.

[0025] The signal acquisition, storage and control system 3 also has the function of compiling test reports, and can also store and print them in the form of documents. The PLC controller has a built-in alarm function and can take timely measures to stop the test. Such alarm functions include abnormal alarms for valve inlet and outlet pressures, abnormal alarms for high-pressure container pressures, abnormal alarms for source pressure gauges, and abnormal alarms for valve opening and closing torques.

[0026] The gas-liquid pipeline includes a high-pressure pipeline, a low-pressure pipeline, a gas source pipeline and a pressure relief pipeline, among which the high-pressure pipeline adopts a double ferrule sealing form. When the pipe valve is connected to the pipe, the pipeline is inserted into the ferrule interface, the front ferrule is pushed into the joint body and the pipeline to form the main seal, and the rear ferrule produces a hinge effect inward to form a strong grip on the pipeline. The geometric shape of the rear ferrule helps to form a hoop effect, which can convert axial movement into radial extrusion on the pipeline, and only a very small assembly torque is required during operation. Finally, the rear ferrule is subjected to force to cause slight deformation and clamping with the outer wall of the pipeline, and the front ferrule forms the main sealing surface to ensure effective sealing of the high-pressure fluid.

[0027] Part of the liquid in the liquid tank of the high-pressure valve life test device is returned to the liquid tank in a closed loop through the valve internal pressure output system, the valve under test 1, and various high and low pressure pipelines, and the other part is returned to the liquid tank in a closed loop through the valve external pressure output system, the high-pressure simulation container 2, and various high and low pressure pipelines. The overall water supply system of the device presents a closed-loop pipeline, which realizes the closed-loop and cyclic use of oil, improves the test efficiency, and greatly saves resources.

[0028] The high-pressure valve life test device needs to run continuously for a long time when assessing the life index of the high-pressure valve. Therefore, the reliability and stability of the device itself have a direct impact on the realization of high-precision and high-efficiency life tests. To this end, the technical means adopted by the present invention include: 1) The liquids and gases used are processed by corresponding filters to prevent the phenomenon of component failure caused by the medium; 2) For electrical accessories with significantly low reliability indicators in the device, similar high-reliability devices are selected; 3) All pipelines use high-pressure resistant hard pipes to ensure that the system's pressure-maintaining function is still effective under high-pressure conditions; 4) Rubber pads, O-rings and other wearing parts in the device are replaced regularly.

[0029] The device can be used to carry out life tests of high-pressure valves under internal pressure or (and) external pressure. The test steps are as follows: 1) Before the test, put the product into the high-pressure simulation container as the test chamber, connect the test interface and close the protective window; 2) Turn on the power supply and air source, and open the test software; 3) After setting the parameters such as water injection time, test pressure, and pressure holding time, start with one button. The system automatically injects the test medium into the product and increases the pressure to the set value; 5) When the pressure reaches the set value, the pressure increase is automatically stopped to maintain the pressure, the valve starts to open and close, and the life test begins. The opening and closing frequency of the valve can be set arbitrarily according to the requirements of the test method; 6) When any of the key performance parameters such as the leakage, inlet and outlet pressures, structural stress, handwheel torque, etc. of the electric stop valve exceeds the specified range (failure criterion or failure threshold), it indicates that the valve has failed. At this time, the pressure stress and fatigue life of the electric stop valve are recorded; 7) Life test data (environmental stress level and the fatigue life or opening and closing times of the electric stop valve under this stress level) are collected to provide basic data for the later reliability life assessment of the high-pressure valve; 8) After the test is completed, the system automatically releases pressure and stops. After the pressure is released, the protective window is opened to take out the product to complete the test.

[0030] The present invention is not limited to the above examples. Within the scope defined by the claims of the present invention, various deformations or modifications that can be made by those skilled in the art without creative work are protected by patents.

Claims

1. A high-pressure valve life test device, comprising a high-pressure simulation container, a valve internal pressure output system, a valve external pressure output system, a signal acquisition, storage and control system, and a gas-liquid pipeline, characterized in that: An electrically driven valve to be tested is placed in the high-pressure simulation container, and a torque sensor is installed between the valve to be tested and the electric drive head to measure the opening and closing torque of the valve; a strain gauge is installed on the valve body of the valve to be tested to measure the deformation of the valve structure; the valve to be tested is connected to the valve internal pressure output system to simulate the internal pressure load experienced by the inner wall of the valve body during the opening and closing process of the valve to be tested; the high-pressure simulation container is connected to the valve external pressure output system to simulate the external pressure load experienced by the outer wall of the valve to be tested under the high-pressure environment of the deep sea; the signal acquisition, storage and control system is connected to the torque sensor, the strain gauge, the electrically driven valve to be tested and the valve internal pressure output system, and the pressure transmitter in the valve external pressure output system is used to control the automatic opening and closing of the electrically driven valve to be tested respectively, so that the pressure load of the electrically driven valve to be tested is automatically pressurized and depressurized as required, and the internal pressure load, external pressure load and internal and external pressure load are applied to the electrically driven valve to be tested, so as to realize the fatigue life test of the electrically driven valve to be tested under the action of dynamic pressure load; the valve internal pressure output system is composed of a pressure transmitter, a throttle valve, and a pressure transmitter. , liquid booster pump, air source solenoid valve, air source pressure gauge, air source regulating valve, pneumatic water injection pump, manual pressure relief valve and pneumatic pressure relief valve. The liquid inlet end of the valve under test is connected to the pressure transmitter through a hydraulic pipeline, and then connected to the liquid tank through a liquid booster pump and a pneumatic water injection pump via a filter. The air inlet end of the liquid booster pump is connected to the compressed air inlet through an air source solenoid valve, an air source regulating valve, an air source ball valve and a filter; the air inlet end of the pneumatic water injection pump is connected to the compressed air inlet through an air source solenoid valve, an air source ball valve and a filter; the other way is connected to the liquid tank through a manual pressure relief valve; the liquid outlet of the valve under test The end is connected to the pressure transmitter through a hydraulic pipeline, and the pressure transmitter is connected to the liquid tank through a throttle valve; the valve external pressure output system is composed of a pressure transmitter, a safety valve, a pneumatic water injection valve, a liquid booster pump, an air source solenoid valve, an air source pressure gauge, and an air source regulating valve. The liquid inlet end of the liquid booster pump is connected to the liquid tank through a filter, and the liquid outlet end is connected to the inside of the high-pressure simulation container through a pressure transmitter and a safety valve. The inside of the high-pressure simulation container is also connected to the liquid tank through a pneumatic water injection valve. The air inlet end of the liquid booster pump is connected to the compressed air inlet through an air source solenoid valve, an air source regulating valve, an air source ball valve, and a filter.

2. The high pressure valve life test device according to claim 1, characterized in that: The signal acquisition, storage and control system consists of a touch screen, a PLC controller, an acquisition module, and a storage module. The PLC controller is connected to the touch screen, the storage module, and the acquisition module respectively. The storage module is used to realize long-term automatic preprocessing and storage of measurement data, and is connected to a printer to print a test report of the measurement data through the printer.

3. The high pressure valve life test device according to claim 2, characterized in that: The PLC controller has a built-in alarm module for abnormal alarm of inlet and outlet pressure of the tested valve, abnormal alarm of high-pressure simulation container pressure, abnormal alarm of source pressure gauge and abnormal alarm of opening and closing torque of the tested valve.

4. The high pressure valve life test device according to claim 1, characterized in that: The high-pressure simulation container includes a cylinder and an end cover. A pressure relief hole is left at the bottom of the cylinder for discharging the liquid inside the container when the test is completed. The side of the cylinder is an arc structure, and a pressure pressurization pipeline interface and five through holes are provided on the end cover. The five through holes are respectively used to connect the valve internal pressure input pipeline, the valve internal pressure output pipeline, the valve external pressure input pipeline, the valve external pressure output pipeline, and the connection between the valve and its electric drive head.

5. The high pressure valve life test device according to claim 4, characterized in that: The pressure relief hole at the bottom of the high-pressure simulation container is connected to the water tank through a manual drain valve.

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