Valve limit performance test system and test method

Abstract

The invention relates to the field of valve testing, in particular to a valve limit performance testing system and method, a tested valve path comprises an in-valve testing pipeline and an out-valve testing pipeline, and the in-valve testing pipeline, the out-valve testing pipeline, a liquid pool, a pressure supply unit and a surge tank are sequentially communicated in the medium flowing direction to form a medium circulation loop; the tested valve is arranged in the in-valve testing pipeline, the in-valve testing pipeline and the in-valve adjusting pipeline are arranged in parallel, and the in-valve adjusting pipeline regulates and controls the flow through the first adjusting valve so as to shunt a medium passing through the tested valve; the back pressure valve and the pore plate are installed in the out-valve testing pipeline to build back pressure, the out-valve testing pipeline and the out-valve adjusting pipeline are arranged in parallel, and the out-valve adjusting pipeline regulates and controls the flow through the second adjusting valve to shunt media passing through the back pressure valve. According to the invention, the ultimate performance of the valve is measured.

Description

Technical Field

[0001] The invention relates to the field of valve testing, and in particular to a valve limit performance testing system and a testing method. Background Art

[0002] There are many reasons for valve leakage, which can be generally divided into external leakage and internal leakage. The reasons for external leakage include leakage of the valve body and valve cover (such as defects such as sand holes, loose structure, slag inclusions, cracks, fissures, folding, etc. on the valve body and valve cover), leakage at the packing (such as aging of the packing and loss of elasticity due to long service life) and improper flange installation (scratches, radial grooves or other defects on the flange sealing surface), etc., while the reasons for internal leakage include sealing surface problems (such as uneven grinding of the sealing surface and inability to form a sealing line), etc. If the valve leaks due to the above problems, the valve leakage will continue to expand and eventually lead to valve failure.

[0003] Traditional factory testing of valves is nothing more than measuring the specific working conditions under which the valve leaks, and there are many ways to test whether a leak occurs. For example, as described in the publication number "CN106907523A", a sensor and a signal transmitter are installed on the valve to measure and determine the critical pressure ratio of the sealing surface, and pre-set it into the signal transmitter. The sensor detects the sealing surface pressure ratio in real time and transmits the pressure ratio signal to the signal transmitter. The signal transmitter compares the detected sealing surface pressure ratio with the pre-set critical pressure ratio to determine whether the valve is about to leak, and sends the result data to the monitoring system to predict whether the valve is leaking by detecting the valve sealing surface pressure ratio.

[0004] However, the above method to predict when a valve will leak cannot fully reflect the valve's ultimate performance. Some valves may have slight leakage during actual operation. Even when the valve has slight leakage, the internal and external pressure difference can still be kept stable and the valve can still work normally. It has not yet reached its ultimate performance and can still maximize the value of its remaining life. However, how to measure the ultimate performance of the valve has always been an urgent problem to be solved. Summary of the invention

[0005] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a valve limit performance test system and a test method. The present invention realizes the determination of the valve limit performance.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A valve limit performance test system, wherein the valve circuit to be tested includes an internal test pipeline and an external test pipeline. Along the flow direction of the medium, the internal test pipeline, the external test pipeline, the liquid pool, the pressure supply unit and the pressure stabilizing tank are sequentially connected to form a medium circulation loop;

[0008] The valve under test is arranged in a test pipeline in the valve, the test pipeline in the valve is arranged in parallel with the regulating pipeline in the valve, and the regulating pipeline in the valve regulates the flow through the first regulating valve to divert the medium passing through the valve under test;

[0009] The back pressure valve and the orifice plate are installed in the test pipeline outside the valve to establish back pressure. The test pipeline outside the valve is arranged in parallel with the regulating pipeline outside the valve. The regulating pipeline outside the valve controls the flow through the second regulating valve to divert the medium passing through the back pressure valve.

[0010] As a further solution of the present invention: a post-valve instrument for collecting medium pressure and flow rate data is provided at the inlet end of the back pressure valve, and a pre-valve instrument for collecting medium pressure and flow rate data is provided at the outlet end of the pressure stabilizing tank.

[0011] As a further solution of the present invention: the circulating medium in the medium circulation loop is a gaseous medium.

[0012] A valve limit performance test method comprises the following steps:

[0013] Install and start the valve limit performance test system, open the valve to be tested and introduce circulating medium until the parameters collected by the instrument before the valve and the instrument after the valve are stable;

[0014] During the internal leakage test, open the first regulating valve and close the second regulating valve, and increase the opening of the first regulating valve in steps until the valve under test cannot maintain pressure. Calculate the maximum leakage Q of the valve under test at this opening of the first regulating valve. G1 ;

[0015] During the external leakage test, close the first regulating valve and open the second regulating valve. Increase the opening of the second regulating valve in steps until the valve under test cannot maintain pressure. Calculate the maximum leakage Q of the valve under test at this opening of the second regulating valve. G2 .

[0016] As a further solution of the present invention:

[0017]

[0018] Wherein, A1 represents the internal leakage area of ​​the tested valve equivalent to the opening of the first regulating valve;

[0019] A2 represents the leakage area of ​​the tested valve equivalent to the opening of the second regulating valve;

[0020] γ represents the adiabatic index of the circulating medium;

[0021] P1 represents the circulating medium pressure;

[0022] P2 represents external environmental pressure;

[0023] ρ represents the density of the circulating medium.

[0024] An electronic device includes a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are connected in sequence, the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the valve limit performance test method.

[0025] A readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the valve limit performance test method.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention uses an orifice plate and a back pressure valve combined circuit to establish back pressure, and the pressure is stable and reliable. By building a test system and establishing a leakage calculation formula, the limit leakage of the valve under the pressure difference is calculated. Under actual working conditions, by measuring whether the real-time leakage of the valve reaches the limit leakage, it can be determined whether the valve has reached the limit performance, which gives full play to the maximum value of the remaining life of the valve and improves the economic benefits brought by the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 This is a comparison diagram of theory and practice of the leakage test of the present invention.

[0030] In the figure:

[0031] 1. Tested valve circuit; 11. Test pipeline outside the valve;

[0032] 111. Back pressure valve; 112. Orifice plate; 113. Instrument after valve;

[0033] 12. Valve external regulating pipeline; 121. Second regulating valve;

[0034] 13. Valve internal regulating pipeline; 131. First regulating valve;

[0035] 14. Test pipeline inside the valve; 141. Tested valve;

[0036] 2. Liquid tank; 3. Pressure supply unit; 4. Pressure regulating tank; 5. Instruments before valve. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figures 1-2 In an embodiment of the present invention, a valve limit performance test system and a test method are provided. The valve circuit 1 to be tested in the test system includes an in-valve test pipeline 13 and an out-valve test pipeline 11. The in-valve test pipeline 13, the out-valve test pipeline 11, the liquid pool 2, the pressure supply unit 3, and the pressure-stabilizing tank 4 are sequentially connected to form a medium circulation loop. The circulating medium introduced into the medium circulation loop is gas. The in-valve regulating pipeline 13 is also arranged in parallel on the in-valve test pipeline 14, and the out-valve regulating pipeline 12 is arranged in parallel on the out-valve test pipeline 11. The in-valve regulating pipeline 13 and the out-valve regulating pipeline 12 are respectively provided with a first regulating valve 131 and a second regulating valve 121.

[0039] The valve 141 to be tested is installed in the test pipeline 14 inside the valve, and the back pressure valve 111 and the orifice plate 112 are installed in the test pipeline 11 outside the valve in sequence to establish back pressure. By adjusting the opening of the first regulating valve 131, the medium passing through the valve 141 to be tested can be diverted to simulate the valve internal leakage condition. By adjusting the opening of the second regulating valve 121, the medium passing through the back pressure valve 111 can be diverted to simulate the valve external leakage condition.

[0040] The working parameters of the system are measured by the pre-valve instrument 5 and the post-valve instrument 113, wherein the pre-valve instrument 5 is arranged at the outlet of the pressure-stabilizing tank 5, and the post-valve instrument 113 is arranged at the inlet of the back pressure valve 111, and the pre-valve instrument 5 and the post-valve instrument 113 include a pressure sensor and a flow sensor.

[0041] The test includes the following steps:

[0042] Install and start a valve limit performance test system, open the valve 141 to be tested and introduce circulating medium until the collected parameters of the pre-valve instrument 5 and the post-valve instrument 113 are stable;

[0043] Open the first regulating valve 131 and close the second regulating valve 121, and increase the opening of the first regulating valve 131 step by step until the valve 141 under test cannot stabilize the pressure, and calculate the limit leakage Q of the valve under test in the internal leakage state G1 ;

[0044] Close the first regulating valve 131 and open the second regulating valve 121, and increase the opening of the second regulating valve 121 step by step until the valve 141 under test cannot stabilize the pressure, and calculate the limit leakage Q of the valve under test in the leakage stateG2 .

[0045] During the test, the openings of the first regulating valve 131 and the second regulating valve 121 are increased from 0 to 1% in steps.

[0046]

[0047] Wherein, A1 represents the internal leakage area of ​​the tested valve 141 equivalent to the opening of the first regulating valve 131;

[0048] A2 represents the leakage area of ​​the tested valve 141 equivalent to the opening of the second regulating valve 121;

[0049] γ represents the adiabatic index of the circulating medium;

[0050] P1 represents the circulating medium pressure;

[0051] P2 represents external environmental pressure;

[0052] ρ represents the density of the circulating medium.

[0053] When the pressure difference of the test system is constant, the opening speed of the regulating valve is 0.001m / c, the circulating medium pressure P1 is 200Kpa, the external environment pressure is the standard atmospheric pressure (101.3KPa), the circulating medium temperature is 293K, the adiabatic index of the circulating medium is 1.4, and the gas constant of the circulating medium is 8.314J / (kg·K);

[0054] like Figure 2 As shown, as the number of cycles increases, the opening of the regulating valve increases, and the corresponding leakage area of ​​the valve also increases. It can be seen that the blue curve is the theoretical fitting curve of the leakage calculation formula in this application, and the blue scattered points are the actual experimental measurement values. Within a certain range, the experimental measurement values ​​are basically consistent with the theoretical calculation values. As the valve leakage area continues to expand, the valve basically fails. At this time, the valve reaches its limit performance. As the leakage area increases, the pressure difference will decrease, resulting in a difference between the experimental measurement value and the theoretical calculation value.

[0055] Another embodiment of the present application is an electronic device.

[0056] The electronic device may be the mobile device itself, or a stand-alone device independent of the mobile device, which may communicate with the mobile device to receive the collected input signals from the mobile device and send the selected target decision behavior to the mobile device.

[0057] An electronic device includes one or more processors and memory.

[0058] The processor may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0059] The memory may include one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor may run the program instructions to implement a valve limit performance test method of each embodiment of the present application described above.

[0060] In one example, the electronic device may further include: an input device and an output device, and these components are interconnected through a bus system and / or other forms of connection mechanisms. For example, the input device may include various devices such as an on-board diagnostic system (OBD), a camera, an industrial camera, etc. The input device may also include, for example, a keyboard, a mouse, etc. The output device may include, for example, a display, a speaker, a printer, and a communication network and a remote output device connected thereto, etc.

[0061] In addition, the electronic device may further include any other appropriate components according to specific application scenarios.

[0062] Another embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the calculation steps according to various embodiments of the present application described in the above-mentioned valve limit performance test method in this specification.

[0063] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0064] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes a valve limit performance test method in this specification.

[0065] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0066] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0067] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A valve limit performance testing system, characterized in that: The valve circuit (1) to be tested comprises an in-valve test pipeline (13) and an out-valve test pipeline (11); along the flow direction of the medium, the in-valve test pipeline (13), the out-valve test pipeline (11), the liquid pool (2), the pressure supply unit (3) and the pressure regulating tank (4) are sequentially connected to form a medium circulation loop; The valve under test (141) is arranged in a test pipeline (14) in the valve, the test pipeline (14) in the valve is arranged in parallel with the regulating pipeline (13) in the valve, and the regulating pipeline (13) in the valve regulates the flow rate through the first regulating valve (131) to divert the medium passing through the valve under test (141); The back pressure valve (111) and the orifice plate (112) are installed in the external test pipeline (11) to establish back pressure. The external test pipeline (11) is arranged in parallel with the external regulating pipeline (12). The external regulating pipeline (12) regulates the flow rate through the second regulating valve (121) to divert the medium passing through the back pressure valve (111).

2. A valve limit performance testing system according to claim 1, characterized in that: The inlet end of the back pressure valve (111) is provided with a post-valve instrument (113) for collecting medium pressure and flow rate data, and the outlet end of the pressure stabilizing tank (4) is provided with a pre-valve instrument (5) for collecting medium pressure and flow rate data.

3. A valve limit performance testing system according to claim 1, characterized in that: The circulating medium in the medium circulation loop is a gaseous medium.

4. A valve limit performance test method, characterized in that: The steps include: Install and start a valve limit performance test system as claimed in any one of claims 1 to 3, open the valve (141) to be tested and introduce a circulating medium until the collected parameters of the pre-valve instrument (5) and the post-valve instrument (113) are stable; During the internal leakage test, the first regulating valve (131) is opened and the second regulating valve (121) is closed, and the opening of the first regulating valve (131) is increased step by step until the valve (141) under test cannot maintain pressure, and the limit leakage Q of the valve (141) under test at the opening of the first regulating valve (131) is calculated. G1 ; During the external leakage test, the first regulating valve (131) is closed and the second regulating valve (121) is opened. The opening of the second regulating valve (121) is increased step by step until the valve (141) under test cannot maintain pressure. The limit leakage Q of the valve (141) under test at the opening of the second regulating valve (121) is calculated. G2 .

5. A valve limit performance testing method according to claim 1, characterized in that: Wherein, A1 represents the internal leakage area of ​​the tested valve (141) equivalent to the opening of the first regulating valve (131); A2 represents the leakage area of ​​the tested valve (141) equivalent to the opening of the second regulating valve (121); γ represents the adiabatic index of the circulating medium; P1 represents the circulating medium pressure; P2 represents external environmental pressure; ρ represents the density of the circulating medium.

6. An electronic device, characterized in that: It includes a processor, an input device, an output device and a memory, which are connected in sequence. The memory is used to store a computer program. The computer program includes program instructions. The processor is configured to call the program instructions to execute a valve limit performance test method as described in claim 4.

7. A readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes a valve limit performance test method as claimed in claim 4.

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