Control valve performance comprehensive test board based on particle image velocity measurement technology

Abstract

The invention discloses a control valve performance comprehensive test board based on a particle image velocity measurement technology, which comprises a medium storage box, a sealing pipeline and the medium storage box form a medium circulation loop, and the sealing pipeline is provided with a test area; the test tube assembly is located in the test area and detachably connected with the sealing pipeline in series, the test tube assembly is provided with a transparent observation tube and a to-be-tested control valve, and the sealing pipeline is provided with temperature and pressure sensors corresponding to the upstream and downstream of the test area respectively; the circulating pump is connected to the side, close to the discharging port, of the sealing pipeline and provides pressure medium fluid for the sealing pipeline, and a pipeline pressure sensor is arranged on the side, close to the circulating pump, of the sealing pipeline; the data acquisition system shoots and acquires the flow state of the medium in the observation pipe in the test area, and the computer is used for displaying the pressure, flow velocity and temperature parameters of the medium in the sealed pipeline in real time and analyzing the corrosion resistance, flow field characteristics, pressure loss, temperature control performance, flow velocity distribution and sealing performance of the test pipe assembly.

Description

Technical Field

[0001] The invention belongs to the field of control valve seal pair performance test application equipment, and specifically relates to a comprehensive test verification equipment for testing the erosion wear, flow field characteristics, durability and sealing performance of a control valve seal pair. Background Art

[0002] High-end control valves are used in a wide range of fields and under special conditions, including ultra-high pressure and ultra-high temperature pipelines, nuclear island and conventional island safety systems, aircraft engine power systems, space station environmental control and life support systems, submarine surfacing and equalization systems, etc., which put forward extremely stringent requirements on the sealing reliability of control valves. High-end control valve sealing pairs are different from traditional mechanical seals. Their service environment is mostly extremely harsh conditions such as high temperature, high pressure difference, strong corrosion, and strong wear, which will cause serious cavitation, erosion, corrosion, thermal deformation, blockage, crushing, scratches and other problems; especially at the moment of opening and closing the control valve, a high-speed jet will be generated at the opening and closing gap, which will severely damage the surface of the sealing pair. When the medium is weak acid and weak alkali or strong acid and strong alkali, such erosion is even more severe; in addition, the control valve sealing pair is different from the traditional static and dynamic seals, and it is necessary to always maintain a high level of sealing performance during the static closing and dynamic opening of the control valve.

[0003] The current mainstream sealing theory is mainly based on the sealing pressure ratio model, which takes into account factors such as the sealing surface material properties, roughness, and sealing surface size. According to the model, the sealing pressure ratio generated by the sealing force must be greater than the required sealing pressure ratio. Under normal working conditions, the sealing design of the control valve can obtain effective theoretical support with the help of the sealing pressure ratio model. However, in the research and development process of high-end control valve products, the applicability of the sealing pressure ratio model under extreme working conditions is limited. In some cases, even if the indentation on the sealing surface does not reach the designed width (the degree of fit is less than 65%), the product can still pass the sealing performance test. Although the sealing surface of some products meets the requirements of the model, it still cannot achieve effective sealing. In addition, the erosion problem of the sealing pair when the medium is weak acid and weak alkali or strong acid and strong alkali is particularly prominent under extreme working conditions, which is also a factor that the existing sealing pressure ratio model has not fully considered.

[0004] The sealing performance test of the control valve is used to detect the sealing performance of the control valve in the closed state to ensure that the control valve can effectively prevent medium leakage; common test methods are:

[0005] Chinese patent CN219391251U discloses a device for detecting the leakage of a valve during a low-pressure gas seal test. Although the device can solve the problem of low precision and poor accuracy in measuring the number of leaking bubbles and the leakage flow rate in existing devices through a bubble counting method or a flow metering method, the method still has the following shortcomings: (1) The detection device is mainly used for detecting the performance of low-pressure gas seals, and may not be applicable to high-pressure environments or other types of sealing tests or may require corresponding adjustments; (2) The device is designed to detect the gas leakage of a valve under low-pressure conditions, and does not explicitly mention the ability to detect liquid leakage. If liquid leakage needs to be detected, additional devices or modifications to existing devices may be required.

[0006] Chinese patent CN117168706A discloses a valve sealing performance test device. Although it can detect whether the valve is completely sealed, it solves the technical problems in the related art that it is difficult to observe small valve leakage through foaming agents or differential pressure gauges and the valve performance cannot be fully evaluated by only performing valve air tightness tests under the same external pressure. However, this method still has the following shortcomings: (1) The design of the device focuses on identifying small valve leakage through underwater detection, but this method is not practical for special materials or applications that cannot be exposed to water; (2) The device is designed for a specific type of valve and may require customized adjustments for valves of different sizes or types, which will increase the overall test cost; (3) The main goal of the device is to detect the sealing performance of the valve, especially to determine whether there is a small leakage by observing whether bubbles are generated. This is a qualitative rather than quantitative detection method and does not provide specific means to quantify the leakage amount, such as leakage rate or leakage volume. This means that if the leakage amount needs to be accurately measured, it may need to be combined with other devices or technologies to meet a wider range of detection needs.

[0007] The flow field characteristic test of the control valve is used to detect the flow field characteristics of the control valve core under different opening states; Chinese patent CN112525275B discloses a pipeline three-dimensional flow field measurement system based on the PIV method. Although this measurement system can complete the flow field measurement and provide experimental conditions for flow meter manufacturers to conduct mechanism analysis and product performance optimization. However, this method still has the following shortcomings: (1) The equipment may be very complex in simulating actual working conditions, especially in multiphase flow systems, which may affect the accuracy and reliability of the test results; (2) The equipment may require additional modification or upgrade for different test requirements or more complex test conditions.

[0008] The erosion and wear test of the seal pair of the control valve is used to detect the erosion and wear of the seal pair by the medium in the high-pressure jet and extreme working conditions under a certain opening of the control valve. Chinese patent CN110160902A discloses a detachable ring-type gas-liquid-solid erosion and wear combined test device. Although the corresponding flow type / flow state in the test pipeline is tested through the organic glass test section, the erosion and wear test of pipelines and valves with different gas, liquid and solid ratios can be realized. However, this method still has the following shortcomings: (1) Although the equipment can test the erosion and wear of pipelines and valves with different gas, liquid and solid ratios, it may not be able to fully simulate all the complex conditions in actual working conditions, such as the chemical properties of the fluid, the shape and hardness of the particles, etc.; (2) The equipment structure is relatively complex, involving multiple components and connection points, which may make installation and operation more difficult; (3) Although the equipment mentions the detachable organic glass test pipe fittings many times, it does not provide detection technical means or equipment.

[0009] Chinese patent CN117517111A discloses an erosion wear test device. Although it can realize single-phase flow or multi-phase flow erosion wear testing to a certain extent, this method still has the following shortcomings: (1) Under multi-phase flow conditions, the flow dynamics may be very complex, which may make it difficult to obtain accurate and repeatable test results and the interaction between different phases may affect the wear mechanism and thus affect the test results; (2) The equipment may be optimized for specific types of media and wear conditions, but this limits its application in other types of wear tests.

[0010] In summary, it is necessary to build a multifunctional comprehensive scientific research and testing platform to address issues such as corrosion resistance, flow field characteristics, pressure loss, temperature control performance, flow velocity distribution and sealing performance of control valve sealing pairs under extreme working conditions.

[0011] Therefore, how to provide a comprehensive test bench for control valve performance based on particle image velocimetry technology is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0012] In view of this, the present invention provides a comprehensive test bench for control valve performance based on particle image velocimetry technology, which has reasonable design, simple structure, and convenient processing. It can easily obtain test data and test range, and can meet the test requirements of different performance of control valves.

[0013] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a comprehensive test bench for control valve performance based on particle image velocimetry technology, comprising: a medium storage tank, wherein the medium storage tank contains a fluid medium for providing a detection process, and the medium storage tank is provided with a discharge port and a reflux port;

[0014] A sealed pipeline, one end of which is connected to the discharge port, and the other end of which is connected to the reflux port and forms a medium circulation loop with the medium storage tank, a test area is provided on the sealed pipeline, and a flow sensor is provided on one side of the sealed pipeline close to the reflux port;

[0015] A test tube assembly, the test tube assembly is located in the test area and is detachably connected in series with the sealed pipeline, the test tube assembly is provided with a transparent observation tube and a control valve to be tested, and the sealed pipeline is provided with temperature and pressure sensors at the upstream and downstream of the test area respectively;

[0016] A circulation pump, which is connected to a side of the sealed pipeline close to the discharge port and provides pressure medium fluid to the sealed pipeline. A pipeline pressure sensor is provided on a side of the sealed pipeline close to the circulation pump;

[0017] A data acquisition system, the data acquisition system photographs and collects the flow state of the medium in the observation tube of the test area;

[0018] A computer, wherein the computer electrical signals are connected to the temperature and pressure sensor, the flow sensor, the pipeline pressure sensor and the data acquisition system, and the computer is used to display the pressure, flow rate and temperature parameters of the medium in the sealed pipeline in real time and can analyze the corrosion resistance, flow field characteristics, pressure loss, temperature control performance, flow rate distribution and sealing performance of the test pipe assembly.

[0019] The beneficial effects of the present invention are as follows: the medium storage tank provides the necessary fluid medium for the test, the test area is used to disassemble and install the test tube assembly, the test tube assembly is connected in series to the sealed pipeline when used for testing, the circulating pump provides the necessary medium pumping pressure for the entire system, the test tube assembly includes an observation tube and a control valve to be tested, the observation tube is used for an external data acquisition system to collect fluid state data in the tube, and provide data support for corresponding analysis. The present invention has strong versatility, and according to different test needs, the corresponding test tube assembly can be replaced in the test area, and various performances of the control valve can be tested, including but not limited to valve sealing performance, flow field characteristics, durability and seal pair erosion and wear tests, and can meet the detection needs of one test equipment for multiple test schemes.

[0020] Preferably, a heating pipe and a temperature sensor are provided in the medium storage tank, and a vent valve is provided at the bottom of the medium storage tank.

[0021] The resulting technical effect is that the heating tube and temperature sensor can control and monitor the temperature of the medium. This setting is for testing the temperature control performance of the control valve sealing pair. By providing a medium environment with different temperatures, the working performance and temperature resistance of the control valve to be tested under different temperature conditions are tested. The drain valve at the bottom of the medium storage tank is conducive to emptying the medium to avoid retaining the medium and affecting subsequent testing.

[0022] Preferably, an electric regulating valve is provided on one side of the sealed pipeline close to the reflux port, and the electric regulating valve controls the stability of the medium and flow in the sealed pipeline.

[0023] The resulting technical effect is: in order to ensure the stability of the medium pressure and flow in the sealed pipeline, an electric regulating valve is set to ensure that the flow rate of the test medium meets the test requirements.

[0024] Preferably, a pressure-stabilizing tank is connected in series downstream of the sealed pipeline near the circulation pump, a pressure-stabilizing tank is provided with a pressure regulating valve for regulating the medium pressure of the sealed pipeline, a pressure-stabilizing tank exhaust valve is provided at the top of the pressure-stabilizing tank, and a pressure-stabilizing tank vent valve is provided at the bottom of the pressure-stabilizing tank.

[0025] The resulting technical effect is: the setting of a pressure-stabilizing tank can ensure the stability of the medium pressure in the sealed pipeline, and the sealed pipeline will not be damaged due to large pressure fluctuations. The pipeline pressure is adjusted by the pressure regulating valve to avoid being too high or too low. The pressure-stabilizing tank exhaust valve ensures the filling of the medium, and the pressure-stabilizing tank vent valve facilitates the release of the medium, and is also convenient for subsequent cleaning and maintenance.

[0026] Preferably, a manual valve and a one-way check valve are provided on the side of the sealed pipeline close to the discharge port, and a back pressure valve is provided on the side of the sealed pipeline close to the reflux port.

[0027] The resulting technical effect is: manual valves, one-way check valves, and back-pressure valves can ensure the flow direction of the medium inside the sealed pipeline, prevent the medium from flowing back, and ensure the pressure stability of the pipeline and the safe use of the circulation pump.

[0028] Preferably, a pressure relief pipeline is connected in parallel on the sealing pipeline and close to the upstream of the testing area, and a terminal of the pressure relief pipeline is connected to the medium storage tank.

[0029] The resulting technical effect is that the pressure relief pipeline is a safety setting that can prevent the pipeline from being damaged by excessive pressure.

[0030] Preferably, in view of the test requirements of the control valve performance to be tested, the medium storage tank is replaced with a neutral fluid, an alkaline fluid or an acidic fluid.

[0031] The resulting technical effect is that it is necessary to reasonably select the medium for different test situations. For example, when testing the corrosion resistance of valves or special pipeline materials in test pipe assemblies, it is necessary to replace the medium fluid with strong acid and strong alkali or weak acid and weak alkali, while when testing the sealing of the valve or the flow field characteristics, it can be replaced with neutral water.

[0032] Preferably, the data acquisition end of the data acquisition system includes but is not limited to a high-speed camera and a scanning electron microscope. By changing the opening of the valve in the test tube assembly and using particle image velocimetry technology to obtain the transient velocity field data of the flow field at different openings of the valve, the flow characteristics of the fluid passing through the valve are obtained through computer analysis.

[0033] The resulting technical effect is: the medium status data in the test area pipeline can be obtained through the data acquisition end of the data acquisition system. Combined with the particle image velocimetry technology, the transient velocity field data of the flow field of the control valve to be tested at different openings can be obtained, and the flow characteristics of the fluid passing through the valve can be analyzed, such as the formation and shedding of vortex streets.

[0034] Preferably, an openable and closed regulating hole is provided downstream of the test area corresponding to the sealing pipeline. When conducting a valve sealing performance test, the control valve to be tested in the test pipe assembly is closed, and the sealing performance of the valve is quantitatively analyzed by collecting the leaked medium in the regulating hole.

[0035] The resulting technical effect is that when testing the sealing performance of the control valve, the leakage can be quantified and its sealing performance can be studied. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of a comprehensive test bench for control valve performance based on particle image velocimetry technology of the present invention Figure 1 ;

[0037] Figure 2 Schematic diagram of a comprehensive test bench for control valve performance based on particle image velocimetry technology of the present invention Figure 2 ;

[0038] Figure 3 The present invention is a schematic diagram of a data acquisition system of a comprehensive test bench for control valve performance based on particle image velocimetry technology.

[0039] 1 medium storage tank, 2 sealed pipeline, 3 test area, 4 flow sensor, 5 test tube assembly, 501 observation tube, 502 control valve to be tested, 6 temperature and pressure sensor, 7 circulation pump, 8 pipeline pressure sensor, 9 data acquisition system, 10 heating tube, 11 temperature sensor, 12 electric regulating valve, 13 pressure regulating tank, 1301 pressure regulating tank exhaust valve, 1302 pressure regulating tank vent valve, 14 manual valve, 15 one-way check valve, 16 back pressure valve, 17 pressure relief pipeline. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See the attached Figures 1 to 3 According to an embodiment of the present invention, a comprehensive test bench for control valve performance based on particle image velocimetry technology comprises: a medium storage tank 1, wherein the medium storage tank 1 contains a fluid medium for providing a detection process, and the medium storage tank 1 is provided with a discharge port and a reflux port;

[0042] A sealed pipeline 2, one end of which is connected to the discharge port, and the other end of which is connected to the reflux port and forms a medium circulation loop with the medium storage tank 1. A test area 3 is provided on the sealed pipeline 2, and a flow sensor 4 is provided on the side of the sealed pipeline 2 close to the reflux port. The flow sensor is used for detecting the flow state in the sealed pipeline;

[0043] A test tube assembly 5, the test tube assembly 5 is located in the test area and is detachably connected in series with the sealed pipeline 2, a transparent observation tube 501 and a control valve to be tested 502 are provided on the test tube assembly 5, and temperature and pressure sensors 6 are provided at the upstream and downstream of the test area of ​​the sealed pipeline 2, respectively. The upstream and downstream temperature and pressure sensors can measure the pressure loss state of the test tube assembly, and by obtaining the pressure difference of the medium flowing into and out of the test area, the pressure loss of the control valve to be tested under different working conditions (weak acid and weak alkali, strong acid and strong alkali medium, different openings and medium flow rates) can be evaluated, and then the flow resistance characteristics of the valve (control valve to be tested) can be analyzed;

[0044] Circulation pump 7, which is connected to the side of the sealed pipeline close to the discharge port and provides pressure medium fluid for the sealed pipeline. A pipeline pressure sensor 8 is provided on the side of the sealed pipeline 2 close to the circulation pump 7. In the early stage of the test, the pipeline pressure sensor and flow sensor are used to ensure that the pressure and flow rate in the sealed pipeline meet the test requirements, so as to provide advance preparation for subsequent tests;

[0045] The data acquisition system 9 captures and collects the flow state of the medium in the observation tube of the test area, including but not limited to the flow velocity of the medium and the flow field state of the medium;

[0046] The computer, the computer electrical signal is connected to the temperature and pressure sensor 6, the flow sensor 4, the pipeline pressure sensor 8 and the data acquisition system 9, the computer has built-in analysis and processing modules and display modules, the computer is used to monitor and display the pressure, flow rate and temperature parameters of the medium in the sealed pipeline 2 in real time and can analyze the corrosion resistance, flow field characteristics, pressure loss, temperature control performance, flow rate distribution and sealing performance of the test tube assembly.

[0047] It should be noted that the test area is the replacement section of the test tube assembly. In this section, the test area is photographed and data is collected with the help of a data acquisition system. The input end of the data acquisition system is connected to the shooting end of a high-speed camera, and the output end is connected to a computer. The collection end also includes other data acquisition equipment such as a scanning electron microscope.

[0048] In order to meet different test requirements and provide different medium temperatures, a heating tube 10 and a temperature sensor 11 are provided in the medium storage tank 1 to facilitate testing the working performance and temperature resistance of the control valve to be tested under different temperature conditions. A vent valve is provided at the bottom of the medium storage tank 1 to ensure that after the test, media with different pH values ​​in the medium storage tank are not leaked and affect the life of the pipeline, and do not affect the subsequent test use.

[0049] In order to control the medium pressure and flow of the sealed pipeline, an electric regulating valve 12 is provided on the side of the sealed pipeline 2 close to the reflux port. The electric regulating valve 12 controls the stability of the medium and flow in the sealed pipeline 2 to ensure that the flow rate of the test medium is ≥5m / s.

[0050] In some other embodiments, a pressure-stabilizing tank 13 is connected in series to the sealed pipeline 2 downstream of the circulation pump 7 to ensure that the medium pressure is stable and the pipeline is not damaged due to large pressure fluctuations. A pressure regulating valve is provided on the pressure-stabilizing tank 13 to adjust the medium pressure of the sealed pipeline 2. A pressure-stabilizing tank exhaust valve 1301 is provided on the top of the pressure-stabilizing tank 13. When in use, all the gas in the sealed pipeline needs to be discharged. A pressure-stabilizing tank vent valve 1302 is provided at the bottom of the pressure-stabilizing tank 13 to facilitate subsequent cleaning and maintenance.

[0051] In some other specific embodiments, a manual valve 14 and a one-way check valve 15 are provided on the side of the sealing pipeline 2 close to the discharge port to prevent the medium from flowing back and damaging the pump body. The manual valve is used for emergency cutting off or manual adjustment of the pipeline. A back pressure valve 16 is provided on the side of the sealing pipeline 2 close to the reflux port to ensure the flow direction of the medium in the sealing pipeline and improve the safety of the testing process.

[0052] In other embodiments, a pressure relief pipeline 17 is connected in parallel to the sealing pipeline 2 and upstream of the test area, and the terminal of the pressure relief pipeline 17 is connected to the medium storage tank 1 to ensure safe use of the sealing pipeline and emergency pressure relief when the pressure is too high.

[0053] In some other embodiments, for testing purposes, the medium storage tank 1 is replaced with a neutral fluid, an alkaline fluid or an acidic fluid, and neutral water is used for sealing testing of the control valve to be tested or testing of the influence on fluid fluidity, and an alkaline or acidic medium is selected for corrosion resistance testing of the control valve to be tested.

[0054] The data acquisition end of the data acquisition system 9 includes but is not limited to a high-speed camera and a scanning electron microscope. By changing the opening of the valve in the test tube assembly and using particle image velocimetry technology to obtain the transient velocity field data of the flow field at different openings of the valve, the flow characteristics of the fluid passing through the valve are obtained through computer analysis.

[0055] An open and closed regulating hole is provided downstream of the test area corresponding to the sealing pipeline 2. When the valve sealing performance test is performed, the control valve to be tested in the test pipe assembly 5 is closed, and the sealing performance of the valve is quantitatively analyzed by collecting the leaked medium in the regulating hole.

[0056] It should be noted that the component connections in the sealed pipeline of the present invention need to ensure a sealed state to avoid leakage. Flange connections can be used to ensure sealing. In order to ensure the long-term operation of the system pipeline, the relevant components are required to have corrosion resistance, high temperature resistance, and high pressure resistance.

[0057] During the specific implementation, the temperature sensor, pressure sensor and flow sensor in the system have certain requirements, and 316L stainless steel is selected. The detection upper limit of the temperature sensor is >300℃, and it is pressure-resistant and corrosion-resistant. The corrosion resistance requirement of the pressure sensor is (ph3-4), and the high temperature resistance requirement is (200-300℃). The measurement range is ≥1mpa. The corrosion resistance requirement of the flow sensor is (ph3-4), and the high temperature resistance requirement is (200-300℃), and the liquid flow rate is ≥5m / s.

[0058] Specific test description:

[0059] When conducting an observation test of pipeline flow field characteristics, it is necessary to first install an observation tube and a test tube assembly in the test area of ​​the sealed pipeline, turn on the circulation pump to pump the medium in the medium storage tank into the sealed pipeline for a few minutes, adjust the pressure regulating tank, observe the pipeline pressure sensor and flow sensor to ensure that the pressure and flow rate in the pipeline meet the test requirements, and then change the valve opening of the control valve to be tested. Use particle image velocimetry technology to obtain the transient velocity field data of the flow field at different valve openings, and analyze the flow characteristics of the fluid when passing through the valve, such as the formation and shedding of vortex streets.

[0060] When conducting corrosion resistance tests on valves or special piping materials, it is necessary to first install the test pipe assembly to be tested and verified in the test area. After installation and commissioning, replace the medium in the medium storage tank with a strong acid and strong alkali or a weak acid and weak alkali medium fluid. Turn on the circulation pump to pump the medium in the medium storage tank into the sealed pipeline for a few minutes, adjust the pressure regulating tank, observe the pipeline pressure sensor and flow sensor to ensure that the pressure and flow rate in the pipeline meet the test requirements, and continue to operate the test platform. After long-term operation in corrosive media and stopping operation for a period of time, remove the test pipe assembly for observation to verify its corrosion resistance in media fluids with different pH values.

[0061] When conducting a valve sealing performance test, it is necessary to install a test pipe assembly in the test area to ensure that the control valve to be tested is installed stably, and the sealing of the test section is ensured by connecting the flange. Then, after the pumped medium is pressure-tested and stabilized, the leaking medium is collected through the regulating hole downstream of the test area for quantitative analysis, or the flow sensor 18 data is observed to study its sealing performance.

[0062] When conducting the control valve seal pair erosion and wear test, it is necessary to first install an observation tube and test piece in the test area, turn on the circulation pump to pump the medium in the medium storage tank into the sealed pipeline for a few minutes, adjust the pressure regulating tank, observe the values ​​of the pipeline pressure sensor and flow sensor, and ensure that the pressure and flow rate in the pipeline meet the test requirements. By changing the valve opening of the control valve to be tested and keeping the valve opening unchanged, the test tube assembly can be removed after the platform has been running for a certain period of time to study the location and degree of seal pair erosion and wear, as well as the variable relationship between the opening, medium properties, medium pressure and flow rate.

[0063] When conducting a valve flow velocity distribution test, the flow rate of the medium in the sealed pipeline is monitored by a flow sensor. Combined with particle image velocimetry technology, the flow velocity distribution inside the sealed pipeline can be analyzed in detail.

[0064] Conduct temperature control performance test on control valve sealing pair, use heating tube to heat medium temperature, temperature and pressure sensors at upstream and downstream of test area can obtain pressure loss change before and after test tube assembly, and also can test working performance and temperature resistance of test valve under different temperature conditions.

[0065] The present invention has at least the following technical effects:

[0066] Through different test tube components and data acquisition systems in the test area, it is capable of conducting various tests on control valve performance, including but not limited to: valve sealing performance, flow field characteristics, durability and seal erosion wear tests, etc., which can meet the testing needs of a test equipment for multiple test schemes;

[0067] By using particle image velocimetry technology to measure and analyze the flow field behind the valve, we can obtain the transient velocity field data of the flow field at different valve openings and analyze the flow characteristics of the fluid when it passes through the valve, such as the formation and shedding of vortex streets.

[0068] The medium pressure, flow rate and valve opening of the sealing pipeline can be adjusted to simulate the working state of the control valve under different extreme working conditions, and the sealing performance of the control valve can be tested based on this, so as to more comprehensively evaluate the sealing performance of the control valve and improve the accuracy of the test results;

[0069] By monitoring the pressure difference between the inflow and outflow of the test area, the pressure loss of the control valve under test under different working conditions (weak acid and weak alkali, strong acid and strong alkali media, different openings and medium flow rates) can be evaluated, and the flow resistance characteristics of the valve can be analyzed.

[0070] The sealed pipeline of the present invention and the supporting components are all resistant to corrosion and temperature. Therefore, through long-term operation, the control valve to be tested can be observed for a long time in the corrosive medium to explore the relationship between the control valve material and variables such as medium flow rate, valve opening and time under corrosive medium. This has extremely important research significance for evaluating the corrosion resistance of the control valve.

[0071] As for the device and the method of use disclosed in the embodiment, since they correspond to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A comprehensive test bench for control valve performance based on particle image velocimetry technology, characterized in that: include: A medium storage box (1), wherein the medium storage box (1) contains a fluid medium for providing a detection process, and the medium storage box (1) is provided with a discharge port and a return port; A sealed pipeline (2), one end of the sealed pipeline (2) is connected to the discharge port, and the other end is connected to the return port and forms a medium circulation loop with the medium storage tank (1), a test area (3) is provided on the sealed pipeline (2), and a flow sensor (4) is provided on a side of the sealed pipeline (2) close to the return port; A test tube assembly (5), the test tube assembly (5) is located in the test area and is detachably connected in series with the sealed pipeline (2), a transparent observation tube (501) and a control valve to be tested (502) are provided on the test tube assembly (5), and temperature and pressure sensors (6) are provided upstream and downstream of the sealed pipeline (2) corresponding to the test area; A circulation pump (7), the circulation pump (7) being connected to a side of the sealed pipeline close to the discharge port and providing pressure medium fluid to the sealed pipeline, and a pipeline pressure sensor (8) being provided on a side of the sealed pipeline (2) close to the circulation pump (7); A data acquisition system (9), wherein the data acquisition system (9) photographs and collects the flow state of the medium in the observation tube of the test area; A computer, wherein the computer is electrically connected to a temperature and pressure sensor (6), a flow sensor (4), a pipeline pressure sensor (8) and a data acquisition system (9), and the computer is used to display the pressure, flow rate and temperature parameters of the medium in the sealed pipeline (2) in real time and to analyze the corrosion resistance, flow field characteristics, pressure loss, temperature control performance, flow rate distribution and sealing performance of the test pipe assembly.

2. According to claim 1, a comprehensive test bench for control valve performance based on particle image velocimetry technology is characterized in that: A heating pipe (10) and a temperature sensor (11) are provided in the medium storage tank (1), and a drain valve is provided at the bottom of the medium storage tank (1).

3. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 1 is characterized in that: An electric regulating valve (12) is provided on one side of the sealed pipeline (2) close to the reflux port, and the electric regulating valve (12) controls the stability of the medium and flow rate in the sealed pipeline (2).

4. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 1 is characterized in that: A pressure-stabilizing tank (13) is connected in series downstream of the sealed pipeline (2) near the circulating pump (7). The pressure-stabilizing tank (13) is provided with a pressure regulating valve for regulating the medium pressure of the sealed pipeline (2). A pressure-stabilizing tank exhaust valve (1301) is provided at the top of the pressure-stabilizing tank (13), and a pressure-stabilizing tank vent valve (1302) is provided at the bottom of the pressure-stabilizing tank (13).

5. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 1 is characterized in that: A manual valve (14) and a one-way check valve (15) are provided on the side of the sealed pipeline (2) close to the discharge port, and a back pressure valve (16) is provided on the side of the sealed pipeline (2) close to the return port.

6. The control valve performance comprehensive test bench based on particle image velocimetry technology according to any one of claims 1 to 5, characterized in that: A pressure relief pipeline (17) is connected in parallel to the sealing pipeline (2) and close to the upstream of the test area, and the terminal end of the pressure relief pipeline (17) is connected to the medium storage tank (1).

7. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 6 is characterized in that: In accordance with the test requirements of the performance of the control valve to be tested, the medium storage tank (1) is replaced with a neutral fluid, an alkaline fluid or an acidic fluid.

8. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 1 is characterized in that: The data acquisition end of the data acquisition system (9) includes but is not limited to a high-speed camera and a scanning electron microscope. By changing the opening of the valve in the test tube assembly and using particle image velocimetry technology to obtain the transient velocity field data of the flow field at different openings of the valve, the flow characteristics of the fluid passing through the valve are obtained through computer analysis.

9. The control valve performance comprehensive test bench based on particle image velocimetry technology according to claim 1 is characterized in that: The sealing pipeline (2) is provided with an openable and closed regulating hole downstream of the corresponding test area. When the valve sealing performance test is carried out, the control valve to be tested in the test pipe assembly (5) is closed, and the sealing performance of the valve is quantitatively analyzed by collecting the leaked medium in the regulating hole.

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