A multi-valve pipeline temperature cycle reliability test system and method

Abstract

The present invention relates to the technical field of valve performance testing, and specifically to a multi-valve pipeline temperature cycle reliability test system and method, the test system: comprising: a first temperature control subsystem, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a first liquid inlet switch valve, and the liquid outlet end is connected to a first liquid outlet switch valve, the first liquid inlet switch valve is used to be connected to the liquid outlet end of the test valve group, and the first liquid outlet switch valve is used to be connected to the liquid inlet end of the test valve group; a second temperature control subsystem, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a second liquid inlet switch valve, and the liquid outlet end is connected to a second liquid outlet switch valve, the second liquid inlet switch valve is used to be connected to the liquid outlet end of the test valve group, and the second liquid outlet switch valve is used to be connected to the liquid inlet end of the test valve group, which can effectively control the heating and cooling rate of the valve during hot and cold shock, improve the test efficiency, and reduce the manpower and material costs. The test method is based on the above-mentioned test system.

Description

Technical Field

[0001] The present invention relates to the technical field of valve performance testing, and in particular to a multi-valve pipeline temperature cycle reliability testing system and method. Background Art

[0002] In scientific research and engineering, electric valves are important components of reactors and primary circuit systems. Electric valves often face system hot and cold cycle shocks during operation. How to use test methods to test hot and cold cycle shocks of electric valves to evaluate the performance of electric valves is a focus of attention for scholars and engineers. Although the existing hot and cold cycle shock test system of electric valves can normally carry out hot and cold shock cycle tests of electric valves, the temperature rise and fall during the test is not easy to control, and the test time is relatively long. Summary of the invention

[0003] In view of the technical problems of the existing electric valve hot and cold cycle shock test system, such as the inconvenient control of heating and cooling and the long test time, the present invention provides a multi-valve pipeline temperature cycle reliability test system and method, which can effectively control the heating and cooling rates of the valves during hot and cold shocks, and can adjust the next working condition during the test, effectively improving the test efficiency and reducing manpower and material costs.

[0004] The present invention is achieved through the following technical solutions:

[0005] In the first aspect, the present invention provides a multi-valve pipeline temperature cycle reliability test system, including: a first temperature control subsystem, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a first liquid inlet switch valve, and the liquid outlet end is connected to a first liquid outlet switch valve, the first liquid inlet switch valve is used to be connected to the liquid outlet end of the test valve group, and the first liquid outlet switch valve is used to be connected to the liquid inlet end of the test valve group; a second temperature control subsystem, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a second liquid inlet switch valve, and the liquid outlet end is connected to a second liquid outlet switch valve, the second liquid inlet switch valve is used to be connected to the liquid outlet end of the test valve group, and the second liquid outlet switch valve is used to be connected to the liquid inlet end of the test valve group.

[0006] The multi-valve pipeline temperature cycle reliability test system provided by the present invention is provided with two temperature control subsystems connected in parallel with the test valve group. Both temperature control subsystems can adjust the temperature of the test liquid (water, oil and other solutions), thereby adjusting the temperature of the test liquid in the test valve group. By controlling the temperature of the test liquid in the test valve group by the two temperature control subsystems, the heating and cooling rates of the valve during hot and cold shocks can be effectively controlled, and the temperature value of the temperature cycle test can be accurately controlled.

[0007] At the same time, during the test process, one temperature control subsystem can control the temperature of the test liquid in the test valve group, and the other temperature control subsystem can adjust the temperature of the test liquid to the test temperature of the next working condition, and then adjust the next working condition, which can greatly save test time, effectively improve test efficiency, and reduce manpower and material costs. In addition, through the cyclic temperature adjustment of the two temperature control subsystems, the temperature cycle test can be carried out repeatedly.

[0008] In summary, the multi-valve pipeline temperature cycle reliability test system provided by the present invention can effectively control the heating and cooling rates of the valves during hot and cold shocks, and can adjust the next working condition during the test, thereby effectively improving the test efficiency and reducing manpower and material costs.

[0009] In an optional embodiment, the first temperature control subsystem and the second temperature control subsystem have the same structure, so as to simplify the composition of the system and ensure that the temperature regulation efficiency of the first temperature control subsystem and the second temperature control subsystem are the same, thereby avoiding standby conditions during the cycle test.

[0010] In an optional embodiment, the first temperature control subsystem includes: a circulation pump connected between a first liquid inlet switch valve and a first liquid outlet switch valve; a heater connected between the circulation pump and the first liquid outlet switch valve; a cooler connected in parallel with the heater; wherein the liquid outlet end of the circulation pump, the liquid inlet end of the heater and the liquid inlet end of the cooler are all connected in series with a first flow regulating valve, and the first flow regulating valve can adjust the flow to zero.

[0011] The test liquid is driven to circulate in the first temperature control subsystem by a circulation pump, or to circulate in the first temperature control subsystem and the test valve group in sequence, and at the same time, the test liquid flowing through the heater is heated by the heater, or the test fluid flowing through the cooler is heated by the cooler, so as to achieve the purpose of controlling the temperature of the test liquid.

[0012] In an optional embodiment, the liquid outlet of the circulation pump, the liquid inlet of the heater and the liquid inlet of the cooler are all connected in series with a first flow meter to determine the flow rate of each branch of the first temperature control subsystem through the first flow meter.

[0013] In an optional embodiment, the first temperature control subsystem further includes a second flow regulating valve, which is connected in parallel with the heater and can adjust the flow to zero. The flow rate and circulation flow rate of each branch of the first temperature control subsystem can be adjusted by the second flow regulating valve, thereby controlling the flow rate of the test liquid that does not need to be heated or cooled.

[0014] In an optional embodiment, the liquid outlets of the heater, the cooler and the second flow regulating valve are all connected to the liquid inlet of the circulation switch valve, and the liquid outlet of the circulation switch valve is connected to the liquid inlet of the circulation pump. By opening and closing the circulation switch valve, the test liquid can be switched to circulate in the first temperature control subsystem, or to circulate in the first temperature control subsystem and the test valve group in sequence.

[0015] In an optional embodiment, the first temperature control subsystem includes a pressure stabilizer, which is connected to the liquid inlet end of the circulation pump to adjust the circulation pressure of the test liquid in the first temperature control subsystem through the pressure stabilizer, so that the entire test system operates within a preset pressure range, so that the temperature cycle test is carried out under constant pressure conditions, avoiding the influence of pressure fluctuations on the accuracy of the test.

[0016] In an optional embodiment, a fluid replenishment subsystem is further included, and the fluid replenishment subsystem is used to replenish the test fluid to the test valve group, so as to replenish the test fluid to the test system in time.

[0017] In a second aspect, the present invention provides a multi-valve pipeline temperature cycle reliability test method, based on the multi-valve pipeline temperature cycle reliability test system described above, comprising the following steps:

[0018] S10, connecting the first temperature control subsystem and the second temperature control subsystem in parallel between the liquid inlet and the liquid outlet of the test valve group;

[0019] S20, connecting the first temperature control subsystem to the test valve group, and disconnecting the second temperature control subsystem from the test valve group;

[0020] S30, respectively raising the test liquid in the first temperature control subsystem to a first test temperature and the test liquid in the second temperature control subsystem to a second test temperature, and maintaining the adjusted working conditions, wherein the second test temperature is greater than the first test temperature;

[0021] S40, disconnecting the first temperature control subsystem from the test valve group, and connecting the second temperature control subsystem to the test valve group, so that the temperature of the test liquid in the test valve group rises to the second test temperature, and conducting an opening and closing test of the test valve group, while adjusting the temperature of the test liquid in the first temperature control subsystem to the third test temperature;

[0022] S50, connecting the first temperature control subsystem with the test valve group, and disconnecting the second temperature control subsystem from the test valve group, so that the temperature of the test liquid in the test valve group is adjusted to the third test temperature, and conducting an opening and closing test of the test valve group, while adjusting the temperature of the test liquid in the second temperature control subsystem to the fourth test temperature;

[0023] S60, repeat step S40 and step S50 until the test is finished.

[0024] The test method provided by the present invention is based on the aforementioned multi-valve pipeline temperature cycle reliability test system, which can effectively control the heating and cooling rates of the valve during hot and cold shocks, and at the same time can adjust the next working condition during the test, effectively improving the test efficiency and reducing manpower and material costs.

[0025] In an optional embodiment, during the test, the pressure in the test valve group is kept constant within a preset threshold value to prevent pressure fluctuations from affecting the accuracy of the test.

[0026] The present invention has the following advantages and beneficial effects:

[0027] 1. The multi-valve pipeline temperature cycle reliability test system provided by the present invention is provided with two temperature control subsystems connected in parallel with the test valve group. Both temperature control subsystems can adjust the temperature of the test liquid, thereby adjusting the temperature of the test liquid in the test valve group. By controlling the temperature of the test liquid in the test valve group by the two temperature control subsystems, the heating and cooling rates of the valve during hot and cold shocks can be effectively controlled, and the temperature value of the temperature cycle test can be accurately controlled.

[0028] 2. The multi-valve pipeline temperature cycle reliability test system provided by the present invention is provided with two temperature control subsystems connected in parallel with the test valve group. During the test, the temperature of the test liquid in the test valve group can be controlled by one temperature control subsystem, and the other temperature control subsystem adjusts the temperature of the test liquid to the test temperature of the next working condition, and then adjusts the next working condition, which can save test time to a great extent, effectively improve test efficiency, and reduce manpower and material costs.

[0029] 3. The multi-valve pipeline temperature cycle reliability test system provided by the present invention is provided with two temperature control subsystems connected in parallel with the test valve group. Through the cyclic temperature adjustment of the two temperature control subsystems, the temperature cycle test can be carried out repeatedly.

[0030] 4. The multi-valve pipeline temperature cycle reliability test method provided by the present invention is based on the aforementioned multi-valve pipeline temperature cycle reliability test system, which can effectively control the heating and cooling rates of the valves during hot and cold shocks, and can adjust the next working condition during the test, thereby effectively improving the test efficiency and reducing manpower and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can also be obtained based on these drawings without creative work.

[0032] In the attached picture:

[0033] Figure 1 A schematic diagram of pipeline connection of a multi-valve pipeline temperature cycle reliability test system according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the piping connection of the temperature control subsystem in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the pipeline connection of the test valve group according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the pipeline connection of the water replenishment subsystem according to an embodiment of the present invention;

[0037] Figure 5 This is a flow chart of a multi-valve pipeline temperature cycle reliability test method according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100-first temperature control subsystem, 101-first liquid inlet switch valve, 102-first liquid outlet switch valve, 103-circulating pump, 104-heater, 105-cooler, 106-first flow regulating valve, 107-first flow meter, 108-second flow regulating valve, 109-circulating switch valve, 110-pressure stabilizer, 111-third switch valve, 112-safety valve, 113-first check valve;

[0040] 200 - second temperature control subsystem, 201 - second liquid inlet switch valve, 202 - second liquid outlet switch valve;

[0041] 300-test valve group, 301-test single valve, 302-third flow regulating valve, 303-second flow meter, 304-fourth switch valve;

[0042] 400 - water replenishment subsystem, 401 - fourth flow regulating valve, 402 - second one-way valve, 403 - liquid replenishment pump, 404 - liquid replenishment tank, 405 - fifth switch valve. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0044] Example 1

[0045] Combination Figure 1 The present embodiment provides a multi-valve pipeline temperature cycle reliability test system. In the first aspect, the present invention provides a multi-valve pipeline temperature cycle reliability test system, including: a first temperature control subsystem 100, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a first liquid inlet switch valve 101, and the liquid outlet end is connected to a first liquid outlet switch valve 102, the first liquid inlet switch valve 101 is used to be connected to the liquid outlet end of the test valve group 300, and the first liquid outlet switch valve 102 is used to be connected to the liquid inlet end of the test valve group 300; a second temperature control subsystem 200, capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a second liquid inlet switch valve 201, and the liquid outlet end is connected to a second liquid outlet switch valve 202, the second liquid inlet switch valve 201 is used to be connected to the liquid outlet end of the test valve group 300, and the second liquid outlet switch valve 202 is used to be connected to the liquid inlet end of the test valve group 300.

[0046] Continue to combine Figure 1 In this embodiment, the first temperature control subsystem 100 and the second temperature control subsystem 200 have the same structure, so as to simplify the composition of the system and ensure that the temperature control efficiency of the first temperature control subsystem 100 and the second temperature control subsystem 200 is the same, thereby avoiding standby during the cycle test.

[0047] Combination Figure 2 The first temperature control subsystem 100 includes: a circulation pump 103, connected between the first liquid inlet switch valve 101 and the first liquid outlet switch valve 102; a heater 104, connected between the circulation pump 103 and the first liquid outlet switch valve 102; a cooler 105, connected in parallel with the heater 104; wherein the liquid outlet end of the circulation pump 103, the liquid inlet end of the heater 104 and the liquid inlet end of the cooler 105 are all connected in series with a first flow regulating valve 106, and the first flow regulating valve 106 can adjust the flow to zero.

[0048] Specifically, the circulation pump 103 is used to circulate the test liquid, and can be a commonly used vane pump, piston pump, or diaphragm pump. It is only necessary to select a pump of the corresponding type and model according to the required flow rate and the pumped medium; the heater 104 only needs to be able to heat the test liquid, and can be an electric heater 104, a gas heater 104, a heat exchange heater 104, etc.; the cooler 105 only needs to be able to cool the test liquid, and can be a semiconductor refrigerator, a heat exchange refrigerator, etc.

[0049] Thus, the test liquid is driven to circulate in the first temperature control subsystem 100 by the circulation pump 103, or to circulate in the first temperature control subsystem 100 and the test valve group 300 in sequence, and the test liquid flowing through the heater 104 is heated by the heater 104, or the test fluid flowing through the cooler 105 is heated by the cooler 105, so as to achieve the purpose of controlling the temperature of the test liquid. To prevent the test liquid from flowing back, a first one-way valve 113 is connected to the liquid outlet end of the circulation pump 103, and the first one-way valve 113 is connected to the first liquid outlet switch valve 102.

[0050] The liquid outlet of the circulation pump 103 , the liquid inlet of the heater 104 and the liquid inlet of the cooler 105 are all connected in series with a first flow meter 107 , so as to determine the flow rate of each branch of the first temperature control subsystem 100 through the first flow meter 107 .

[0051] On this basis, the first temperature control subsystem 100 further includes a second flow regulating valve 108, which is connected in parallel with the heater 104 and can adjust the flow to zero. The flow rate and circulation flow rate of each branch of the first temperature control subsystem 100 can be adjusted by the second flow regulating valve 108, so as to control the flow rate of the test liquid that does not need to be heated or cooled.

[0052] It can be understood that the liquid outlets of the heater 104, the cooler 105 and the second flow regulating valve 108 are all connected to the liquid inlet of the circulation switch valve 109, and the liquid outlet of the circulation switch valve 109 is connected to the liquid inlet of the circulation pump 103. By opening and closing the circulation switch valve 109, the test liquid can be switched to circulate in the first temperature control subsystem 100, or to circulate in the first temperature control subsystem 100 and the test valve group 300 in sequence.

[0053] In addition, the first temperature control subsystem 100 includes a pressure regulator 110, and the pressure regulator 110 is connected to the liquid inlet end of the circulation pump 103. The pressure regulator 110 can also be called an accumulator, such as a piston accumulator, a spring accumulator, a diaphragm accumulator, etc., which can absorb excess test liquid when the pressure in the pipeline system is high, and replenish the test liquid when the pressure in the pipeline system is too low.

[0054] Therefore, it is possible to absorb pressure fluctuations in the piping system and adjust the circulating pressure of the test liquid in the first temperature control subsystem 100 through the regulator 110, so that the entire test system operates within a preset pressure range, so that the temperature cycle test is carried out under constant pressure conditions, avoiding the influence of pressure fluctuations on the accuracy of the test.

[0055] To prevent the voltage regulator 110 from over-pressure, in this embodiment, the voltage regulator 110 is adapted with a safety valve 112. At the same time, to facilitate control of whether the voltage regulator 110 is connected to the temperature control subsystem, a third switch valve 111 is connected to the medium connection section of the voltage regulator 110.

[0056] Since the specific composition of the second temperature control subsystem 200 is the same as that of the first temperature control subsystem 100 , it will not be described in detail in this example, and the names and numbers of the components therein also follow the names and numbers of the components in the first temperature control subsystem 100 .

[0057] It should be understood that a liquid replenishment subsystem is also included, and the liquid replenishment subsystem is used to replenish the test liquid to the test valve group 300, so as to replenish the test liquid to the test system in time. Figure 4 In this example, the fluid replenishment subsystem includes a fourth flow regulating valve 401, a second one-way valve 402, a fluid replenishment pump 403, a fluid replenishment tank 404 and a fifth switch valve 405 which are connected in series in sequence. The fourth flow regulating valve 401 is used to control whether fluid replenishment is performed and the amount of fluid replenishment flow. The second one-way valve 402 prevents the test liquid from flowing back to the fluid replenishment pump 403. The fluid replenishment tank 404 is used to temporarily store the test liquid. The fifth switch valve 405 is used to control the on-off connection between the test liquid source and the fluid replenishment tank 404.

[0058] Combination Figure 3 Generally speaking, the test valve group 300 includes a plurality of parallel test single valves 301, and a fourth switch valve 304 is connected to the liquid outlet of the test single valve 301 to control the on-off of a single branch connected to the test single valve 301 through the fourth switch valve 304. A third flow regulating valve 302 and a second flow meter 303 are sequentially connected to the liquid inlet of the test single valve 301 to control the flow of the test liquid entering the test single valve 301 through the third flow regulating valve 302, and the corresponding flow size is monitored through the second flow meter 303. The number of the test single valves 301 can be determined according to the test requirements.

[0059] The multi-valve pipeline temperature cycle reliability test system provided in this embodiment is provided with two temperature control subsystems connected in parallel with the test valve group 300. Both temperature control subsystems can adjust the temperature of the test liquid (water, oil or other solutions, deionized water is used in this embodiment), thereby adjusting the temperature of the test liquid in the test valve group 300. By controlling the temperature of the test liquid in the test valve group 300 by the two temperature control subsystems, the heating and cooling rates of the valve during hot and cold shocks can be effectively controlled, and the temperature value of the temperature cycle test can be accurately controlled.

[0060] At the same time, during the test process, the temperature of the test liquid in the test valve group 300 can be controlled by one temperature control subsystem, and the temperature of the test liquid can be adjusted to the test temperature of the next working condition by another temperature control subsystem, and then the next working condition can be adjusted, which can greatly save the test time, effectively improve the test efficiency, and reduce the manpower and material costs. In addition, through the cyclic temperature adjustment of the two temperature control subsystems, the temperature cycle test can be carried out repeatedly.

[0061] In summary, the multi-valve pipeline temperature cycle reliability test system provided in this embodiment can effectively control the heating and cooling rates of the valves during hot and cold shocks, and can adjust the next working condition during the test, thereby effectively improving the test efficiency and reducing manpower and material costs.

[0062] Example 2

[0063] Combination Figure 5 This embodiment provides a multi-valve pipeline temperature cycle reliability test method, based on the multi-valve pipeline temperature cycle reliability test system recorded in Example 1, including the following steps:

[0064] S10 , connecting the first temperature control subsystem 100 and the second temperature control subsystem 200 in parallel between the liquid inlet and the liquid outlet of the test valve group 300 .

[0065] Specifically, the circuit needs to be replenished with water before the test is carried out. When replenishing water, the heating system of the next working condition, such as the second temperature control subsystem 200, is replenished first, and then the heating system of the previous working condition (the first temperature control subsystem 100) is replenished.

[0066] That is, first open the second liquid outlet switch valve 202, close the first liquid inlet switch valve 101, the first liquid outlet switch valve 102 and the second liquid inlet switch valve 201, replenish water to the second temperature control subsystem 200 through the liquid replenishment subsystem, then close the second liquid inlet switch valve 201 and the second liquid outlet switch valve 202, open the first liquid inlet switch valve 101 and the first liquid outlet switch valve 102, and replenish water to the first temperature control subsystem 100 and the test valve group 300. In the process of replenishing water to each subsystem, keep the valve in each subsystem in an open state.

[0067] S20 , connecting the first temperature control subsystem 100 and the test valve group 300 , and disconnecting the second temperature control subsystem 200 and the test valve group 300 .

[0068] Specifically, the second liquid inlet switch valve 201 and the second liquid outlet switch valve 202 are in a closed state, and the first liquid inlet switch valve 101 and the first liquid outlet switch valve 102 are in an open state.

[0069] S30, raising the test liquid in the first temperature control subsystem 100 to a first test temperature, raising the test liquid in the second temperature control subsystem to a second test temperature, and maintaining the adjusted working conditions, wherein the second test temperature is greater than the first test temperature.

[0070] In this embodiment, after the water replenishment is completed, the heating system 1 and the heating system 2 start to heat up at the same time, and when the temperature of the first temperature control subsystem 100 rises to the first test temperature and the liquid pressure reaches the preset threshold, the working condition of the first temperature control subsystem 100 is maintained, and when the temperature of the second temperature control subsystem 200 rises to the second test temperature and the liquid pressure reaches the preset threshold, the working condition of the second temperature control subsystem 200 is maintained. At this time, the working conditions of the test valve group 300 and the first temperature control subsystem 100 are consistent.

[0071] S40, disconnect the first temperature control subsystem 100 from the test valve group 300, and connect the second temperature control subsystem 200 to the test valve group 300, so that the temperature of the test liquid in the test valve group 300 rises to the second test temperature, and carry out an opening and closing test of the test valve group 300, and at the same time adjust the temperature of the test liquid in the first temperature control subsystem 100 to the third test temperature.

[0072] Specifically, first close the first liquid inlet switch valve 101 and the first liquid outlet switch valve 102 of the first temperature control subsystem 100, open the second liquid inlet switch valve 201 and the second liquid outlet switch valve 202 of the second temperature control subsystem 200 and the fourth switch valve 304 of each test branch; then slowly adjust the opening of the third flow adjustment of each test branch to change the temperature of the test valve group 300 branch from the first test temperature to the second test temperature within the set time. And carry out the test reverse temperature cycle reliability test.

[0073] At the same time, the opening and closing test of the test valve is immediately carried out after the test condition reaches the second test temperature and the preset threshold pressure. During the opening and closing test of the test valve, the first temperature control subsystem 100 is adjusted to the next condition at the same time to adjust it to the third test temperature and the preset threshold pressure.

[0074] S50, connecting the first temperature control subsystem 100 and the test valve group 300, and disconnecting the second temperature control subsystem 200 and the test valve group 300, so that the temperature of the test liquid in the test valve group 300 is adjusted to the third test temperature, and conducting an opening and closing test of the test valve group 300, and at the same time adjusting the temperature of the test liquid in the second temperature control subsystem 200 to the fourth test temperature.

[0075] Specifically, first close the second liquid inlet switch valve 201 and the second liquid outlet switch valve 202 of the second temperature control subsystem 200, open the first liquid inlet switch valve 101 and the first liquid outlet switch valve 102 of the first temperature control subsystem 100 and the fourth switch valve 304 of each test branch; then slowly adjust the opening of the third flow control valve of each test branch to change the temperature of the test valve group 300 branch from the second test temperature to the third test temperature within the set time. And carry out the test reverse temperature cycle reliability test.

[0076] At the same time, the opening and closing test of the test valve is immediately carried out after the test condition reaches the third test temperature and the preset threshold pressure. During the opening and closing test of the test valve, the second temperature control subsystem 200 is adjusted to the next condition at the same time to adjust it to the fourth test temperature and the preset threshold pressure.

[0077] S60, repeat step S40 and step S50 until the test is finished.

[0078] The test method provided in this embodiment is based on the aforementioned multi-valve pipeline temperature cycle reliability test system, which can effectively control the heating and cooling rates of the valves during hot and cold shocks, and can adjust the next working condition during the test, thereby effectively improving the test efficiency and reducing manpower and material costs.

[0079] During the test, the pressure in the test valve group 300 is kept constant within a preset threshold value to prevent pressure fluctuations from affecting the accuracy of the test.

[0080] It can be understood that the test system and method described in this application can not only effectively diagnose the fault status of electric valves, but also be applied to the fault diagnosis of electric valves in the fields of nuclear power, wind power, thermal power, chemical industry, petroleum, etc.

[0081] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-valve pipeline temperature cycle reliability test method, characterized in that: Based on a multi-valve pipeline temperature cycle reliability test system, the multi-valve pipeline temperature cycle reliability test system includes: A first temperature control subsystem (100) is capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a first liquid inlet switch valve (101), and the liquid outlet end is connected to a first liquid outlet switch valve (102), the first liquid inlet switch valve (101) is used to be connected to the liquid outlet end of the test valve group (300), and the first liquid outlet switch valve (102) is used to be connected to the liquid inlet end of the test valve group (300); The second temperature control subsystem (200) is capable of adjusting the temperature of the test liquid, and the liquid inlet end is connected to a second liquid inlet switch valve (201), and the liquid outlet end is connected to a second liquid outlet switch valve (202), the second liquid inlet switch valve (201) is used to be connected to the liquid outlet end of the test valve group (300), and the second liquid outlet switch valve (202) is used to be connected to the liquid inlet end of the test valve group (300); The multi-valve pipeline temperature cycle reliability test method comprises the following steps: S10, connecting the first temperature control subsystem (100) and the second temperature control subsystem (200) in parallel between the liquid inlet and the liquid outlet of the test valve group (300); S20, connecting the first temperature control subsystem (100) to the test valve group (300), and disconnecting the second temperature control subsystem (200) from the test valve group (300); S30, respectively raising the test liquid in the first temperature control subsystem (100) to a first test temperature, adjusting the test liquid in the second temperature control subsystem to a second test temperature, and maintaining the adjusted working conditions, wherein the second test temperature is greater than the first test temperature; S40, disconnecting the first temperature control subsystem (100) from the test valve group (300), and connecting the second temperature control subsystem (200) to the test valve group (300), so that the temperature of the test liquid in the test valve group (300) is adjusted to a second test temperature, and carrying out an opening and closing test of the test valve group (300), while adjusting the temperature of the test liquid in the first temperature control subsystem (100) to a third test temperature; S50, connecting the first temperature control subsystem (100) to the test valve group (300), and disconnecting the second temperature control subsystem (200) from the test valve group (300), so that the temperature of the test liquid in the test valve group (300) is adjusted to a third test temperature, and performing an opening and closing test of the test valve group (300), while adjusting the temperature of the test liquid in the second temperature control subsystem (200) to a fourth test temperature; S60, repeat step S40 and step S50 until the test is finished.

2. The multi-valve pipeline temperature cycle reliability test method according to claim 1, characterized in that: During the test, the pressure in the test valve group (300) is kept constant within a preset threshold.

3. The multi-valve pipeline temperature cycle reliability test method according to claim 1, characterized in that: The first temperature control subsystem (100) and the second temperature control subsystem (200) have the same structure.

4. The multi-valve pipeline temperature cycle reliability test method according to claim 3, characterized in that: The first temperature control subsystem (100) comprises: A circulation pump (103) connected between the first liquid inlet switch valve (101) and the first liquid outlet switch valve (102); A heater (104) connected between the circulation pump (103) and the first liquid outlet switch valve (102); A cooler (105) connected in parallel with the heater (104); The liquid outlet of the circulation pump (103), the liquid inlet of the heater (104) and the liquid inlet of the cooler (105) are all connected in series with a first flow regulating valve (106), and the first flow regulating valve (106) can adjust the flow rate to zero.

5. The multi-valve pipeline temperature cycle reliability test method according to claim 4 is characterized in that: The liquid outlet of the circulation pump (103), the liquid inlet of the heater (104) and the liquid inlet of the cooler (105) are all connected in series with a first flow meter (107).

6. The multi-valve pipeline temperature cycle reliability test method according to claim 4, characterized in that: The first temperature control subsystem (100) further comprises a second flow regulating valve (108), wherein the second flow regulating valve (108) is connected in parallel with the heater (104), and the second flow regulating valve (108) is capable of adjusting the flow rate to zero.

7. The multi-valve pipeline temperature cycle reliability test method according to claim 6, characterized in that: The liquid outlet ends of the heater (104), the cooler (105) and the second flow regulating valve (108) are all connected to the liquid inlet end of the circulation switch valve (109), and the liquid outlet end of the circulation switch valve (109) is connected to the liquid inlet end of the circulation pump (103).

8. The multi-valve pipeline temperature cycle reliability test method according to any one of claims 4 to 7, characterized in that: The first temperature control subsystem (100) comprises a voltage stabilizer (110), and the voltage stabilizer (110) is connected to the liquid inlet end of the circulation pump (103).

9. The multi-valve pipeline temperature cycle reliability test method according to claim 8, characterized in that: It also includes a fluid replenishment subsystem, which is used to replenish the test fluid to the test valve group (300).

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