Valve testing system and valve testing method

Abstract

The invention relates to the technical field of valve testing, and discloses a valve testing system and a valve testing method.The valve testing system comprises an installation assembly, an air pressure assembly, a hydraulic assembly and a testing assembly, the installation assembly comprises an installation box and a temperature adjusting assembly, the installation box is used for containing a valve to be tested, and the temperature adjusting assembly can adjust the temperature in the installation box. The air pressure assembly is used for outputting a gas medium, the hydraulic assembly is used for outputting a liquid medium, the input end of the testing assembly is connected with the air pressure assembly and the hydraulic assembly, the output end of the testing assembly is connected with the mounting assembly, and the testing assembly is used for controlling the connection states of the hydraulic assembly and the air pressure assembly with a to-be-tested valve. The valve test system can comprehensively test the temperature, the pressure and the working medium according to the performance of the valve to be tested, the test function of the valve is enriched, and the flexibility and the universality of the valve test are improved.

Description

Technical Field

[0001] This application relates to the technical field of valve testing, and particularly to a valve testing system and a valve testing method. Background Art

[0002] In the process of oil extraction and production, valves, as key equipment, are often in harsh working conditions, such as a medium environment with strong corrosion, flammability, explosiveness, or even toxicity, which easily leads to leakage and production accidents. With the development of petrochemical projects towards industrial parks and large-scale, the project has put forward more stringent requirements for the quality of valves. The construction of a valve performance testing platform will become the key cornerstone for improving the high localization rate of valves.

[0003] In related technologies, most valve testing systems are only for a certain type of high-pressure valve or a certain functional valve, with a single testing function for valves, poor flexibility and versatility, unable to meet various testing requirements, resulting in the need to build multiple test platforms to complete various inspection needs, increasing the cost of valve testing. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, according to an embodiment of the present application, a valve testing system is proposed. The valve testing system includes: a mounting assembly, a pneumatic assembly, a hydraulic assembly, and a testing assembly. The mounting assembly includes a mounting box and a temperature adjustment assembly. The mounting box is used to accommodate the valve to be tested, and the temperature adjustment assembly can adjust the temperature inside the mounting box. The pneumatic assembly is used to output a gas medium, the hydraulic assembly is used to output a liquid medium, the input ends of the testing assembly are respectively connected to the pneumatic assembly and the hydraulic assembly, and the output end of the testing assembly is connected to the mounting assembly. The testing assembly is used to control the connection states of the hydraulic assembly and the pneumatic assembly with the valve to be tested.

[0006] In some technical solutions provided by the present application, the hydraulic assembly includes: a first hydraulic pump and a second hydraulic pump. The inlet ends of the first hydraulic pump and the second hydraulic pump are connected to the liquid inlet, the outlet ends of the first hydraulic pump and the second hydraulic pump are connected to the input end of the testing assembly, and the working pressure of the second hydraulic pump is greater than that of the first hydraulic pump.

[0007] In some technical solutions provided by the present application, the pneumatic assembly includes: a gas storage cylinder;

[0008] , a first air pressure pump, a second air pressure pump, and a third air pressure pump. The inlet end of the first air pressure pump is connected to a gas storage cylinder. The inlet end of the second air pressure pump is connected to the outlet end of the first air pressure pump. The inlet end of the third air pressure pump is connected to the outlet end of the second air pressure pump. The outlet end of the third air pressure pump is connected to the input end of the test assembly. The working pressure of the third air pressure pump is greater than that of the second air pressure pump, and the working pressure of the second air pressure pump is greater than that of the first air pressure pump.

[0009] In some technical solutions provided by the present application, the air pressure assembly further includes: a pressurizing device, which is connected to the gas storage cylinder and is used to increase the pressure of the gas medium in the gas storage cylinder.

[0010] In some technical solutions provided by the present application, the test assembly includes: a low-pressure air inlet, a first outlet, a second outlet, a first input pipeline, a first output pipeline, a second input pipeline, and a second output pipeline. The low-pressure air inlet is connected to the air pressure assembly. The first outlet and the second outlet are respectively used to connect the two ends of the valve to be tested. The first input pipeline connects the low-pressure air inlet and the first outlet. The first output pipeline connects the second outlet and the first pressure relief port. The second input pipeline connects the low-pressure air inlet and the second outlet. The second output pipeline connects the first outlet and the second pressure relief port.

[0011] In some technical solutions provided by the present application, the test assembly further includes: a high-pressure air inlet, a high-pressure liquid inlet, and a third input pipeline. The high-pressure air inlet is connected to the air pressure assembly. The high-pressure liquid inlet is connected to the hydraulic assembly. The inlet end of the third air inlet pipeline is respectively connected to the high-pressure air inlet and the high-pressure liquid inlet. The outlet end of the third input pipeline is connected to the first outlet.

[0012] In some technical solutions provided by the present application, the temperature adjustment assembly includes: a heating module and a cascade refrigeration module. The heating module is arranged in the installation box and is used to raise the temperature in the installation box. The cascade refrigeration module is arranged in the installation box and is used to lower the temperature in the installation box.

[0013] In some technical solutions provided by the present application, the installation assembly further includes: an air pressure balance module, which is arranged in the installation box and is used to make the air pressure inside and outside the installation box the same.

[0014] In some technical solutions provided by the present application, the valve test system further includes: a driving member, a torque sensor, a data acquisition member, and a control module. The torque sensor is used to connect the valve to be tested and the driving member. The data acquisition member is respectively connected to the installation assembly, the air pressure assembly, the hydraulic assembly, and the test assembly. The control module is used to obtain the detection data of the data acquisition member and the torque sensor, confirm that the detection data exceeds the preset range, and output an alarm message.

[0015] In the second aspect of the technical solution of the present application, a valve testing method is provided. This valve testing method utilizes the valve testing system provided by any one of the above-mentioned first aspect technical solutions. The valve testing method includes: obtaining the test status of the valve to be tested; when it is confirmed that the test status is high hydraulic pressure testing, turning on the first hydraulic pump to make the hydraulic pressure in the valve to be tested reach the first hydraulic pressure; turning off the first hydraulic pump, turning on the second hydraulic pump to make the hydraulic pressure in the valve to be tested reach the test hydraulic pressure; when it is confirmed that the test status is high air pressure testing, turning on the first air pressure pump to make the air pressure in the valve to be tested reach the first air pressure; turning on the second air pressure pump to make the air pressure in the valve to be tested reach the second air pressure; turning on the third air pressure pump to make the air pressure in the valve to be tested reach the test air pressure.

[0016] Compared with the related art, the present invention at least includes the following beneficial effects:

[0017] The valve testing system can conduct comprehensive tests on the performance of the valve to be tested in terms of temperature, pressure, and working medium. It is especially suitable for the performance testing of high-pressure valves in industries such as petroleum, chemical, and natural gas under extreme temperature, high pressure, and multiple medium conditions. It enriches the testing functions of the valve, improves the flexibility and versatility of valve testing, that is, it can meet the various testing requirements of different types of valves, avoid rebuilding the testing platform when testing different valves, and can also meet the multiple project tests of the same valve to be tested, improve the convenience of valve testing, and reduce the testing cost. Description of the Drawings

[0018] By reading the detailed descriptions of some embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing some embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 It is a structural block diagram of a valve testing system according to an embodiment provided by the present application;

[0020] Figure 2 It is a connection schematic diagram of a hydraulic component according to an embodiment provided by the present application;

[0021] Figure 3 It is a connection schematic diagram of a pneumatic component according to an embodiment provided by the present application;

[0022] Figure 4 It is a connection schematic diagram of a test component according to an embodiment provided by the present application;

[0023] Figure 5 It is a partial structural schematic diagram of a valve testing system according to an embodiment provided by the present application;

[0024] Figure 6Schematic flow diagram of a valve testing method provided by this application.

[0025] Among them, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0026] 100 Installation component, 110 Installation box, 120 Temperature adjustment component, 121 Heating module, 122 Cascade refrigeration module, 130 Air pressure balance module, 200 Air pressure component, 210 Gas storage cylinder, 220 First air pressure pump, 230 Second air pressure pump, 240 Third air pressure pump, 250 Temperature-variable air pressure detection port, 260 Normal-temperature air pressure detection port, 300 Hydraulic component, 310 First hydraulic pump, 320 Second hydraulic pump, 330 Temperature-variable hydraulic detection port, 340 Normal-temperature hydraulic detection port, 400 Testing component, 410 Low-pressure air inlet, 420 First outlet, 430 Second outlet, 440 First input pipeline, 450 First output pipeline, 460 Second input pipeline, 470 Second output pipeline, 481 High-pressure air inlet, 482 High-pressure liquid inlet, 490 Third input pipeline, 500 Driving part, 600 Torque sensor, 700 Data acquisition part, 800 Control device, 10 Valve to be tested, 20 Liquid infusion port, 30 First pressure relief port, 40 Second pressure relief port. Specific implementation mode

[0027] In order to better understand the above technical solution, the technical solution of the embodiment of this application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiment of this application and the embodiments are detailed descriptions of the technical solution of the embodiment of this application, rather than limitations on the technical solution of this application. Without conflict, the technical features in the embodiment of this application and the embodiments can be combined with each other.

[0028] The first aspect embodiment of this application provides a valve testing system, as Figure 1 and Figure 4 shown. This valve testing system includes: an installation component 100, an air pressure component 200, a hydraulic component 300, and a testing component 400. The installation component 100 includes an installation box 110 and a temperature adjustment component 120. The installation box 110 is used to accommodate the valve to be tested 10, and the temperature adjustment component 120 can adjust the temperature inside the installation box 110. The air pressure component 200 is used to output a gas medium, the hydraulic component 300 is used to output a liquid medium, the input ends of the testing component 400 are respectively connected to the air pressure component 200 and the hydraulic component 300, the output end of the testing component 400 is connected to the installation component 100, and the testing component 400 is used to control the connection states of the hydraulic component 300 and the air pressure component 200 with the valve to be tested 10 respectively.

[0029] In this embodiment, the valve 10 to be tested is installed in the installation box 110. The installation box 110 is provided with a temperature control component 120, which can adjust the temperature inside the installation box 110 to simulate the ambient temperature of the valve 10 to be tested, and test the working state of the valve 10 to be tested at different temperatures. Exemplarily, the valve 10 to be tested is arranged on the bottom plate of the installation box 110. The bottom plate is provided with reinforced I-beams to ensure the bearing strength of the installation box 110. The large door of the installation box 110 is provided with multiple locking devices.

[0030] The gas medium and liquid medium output by the pneumatic component 200 and the hydraulic component 300 enter the test component 400. The test component 400 can control the connection states of the hydraulic component 300 and the pneumatic component 200 with the valve 10 to be tested respectively, so as to control the on-off states of the pneumatic component 200 and the hydraulic component 300 with the valve 10 to be tested, and then make the gas medium or liquid medium enter the valve 10 to be tested. The test component 400 can control the type of working medium entering the valve 10 to be tested, so that the valve 10 to be tested can be tested for different media. The pneumatic component 200 and the hydraulic component 300 can respectively adjust the pressure of the output medium, so that the valve 10 to be tested can be tested at different pressures.

[0031] The test component 400 is provided with multiple control valves. By switching different control valves, test items such as dynamic on / off cycle pressure tests, valve body pressure / temperature cycles, and pressure holding tests at normal temperature, high temperature, and low temperature can be realized. The cycle test is that under rated conditions, the valve 10 to be tested performs a specified number of switch operation cycles.

[0032] The valve test system can perform comprehensive tests on the temperature, pressure, and working medium of the valve 10 to be tested. It is especially suitable for performance tests of high-pressure valves in industries such as petroleum, chemical industry, and natural gas under extreme temperature, high pressure, and multiple medium conditions. It enriches the test functions of the valve, improves the flexibility and versatility of valve testing, that is, it can meet the multiple test requirements of different types of valves, avoid rebuilding the test platform when testing different valves, and can also meet the multiple project tests of the same valve 10 to be tested, improve the convenience of valve testing, and reduce the test and maintenance costs.

[0033] In some embodiments provided by the present application, as Figure 2 shown, the hydraulic component 300 includes: a first hydraulic pump 310 and a second hydraulic pump 320. The inlet ends of the first hydraulic pump 310 and the second hydraulic pump 320 are connected to the liquid inlet 20. The outlet ends of the first hydraulic pump 310 and the second hydraulic pump 320 are connected to the input end of the test component 400. The working pressure of the second hydraulic pump 320 is greater than the working pressure of the first hydraulic pump 310.

[0034] In this embodiment, the infusion port 20 is used to output a liquid medium. The first hydraulic pump 310 is a low-pressure hydraulic pump, and the second hydraulic pump 320 is a high-pressure hydraulic pump. The first hydraulic pump 310 and the second hydraulic pump 320 are connected in parallel between the infusion port 20 and the test assembly 400.

[0035] It should be noted that the smaller the working pressure of the hydraulic pump, the larger the flow rate of the liquid medium it outputs.

[0036] The hydraulic assembly 300 adopts a multi-stage pressure boosting principle. Specifically, when the test hydraulic pressure is less than the pressure threshold, it is confirmed that the test state is a low-hydraulic test. The hydraulic assembly 300 uses a large-flow low-pressure pump to quickly boost the pressure to the test hydraulic pressure. When the test pressure is greater than or equal to the pressure threshold, it is confirmed that the test state is a high-hydraulic test. The hydraulic assembly 300 first turns on the first hydraulic pump 310 to quickly pre-fill the liquid through the low-pressure hydraulic pump, so that the pressure of the test liquid quickly increases to the first hydraulic pressure, and the first hydraulic pressure is less than the test hydraulic pressure. Then, the first hydraulic pump 310 is turned off and the second hydraulic pump 320 is turned on to boost the pressure of the test liquid to the test hydraulic pressure through the high-pressure hydraulic pump.

[0037] By setting the first hydraulic pump 310 and the second hydraulic pump 320, the hydraulic assembly 300 forms a hydraulic system with two-stage pressure boosting. The two-stage hydraulic pumps are used in cooperation. After the liquid pressure reaches the preset intermediate value, it is switched to a small-flow high-pressure pump to accurately increase the final pressure to the test hydraulic pressure required for the test. The hierarchical control method not only shortens the time for the hydraulic assembly 300 to increase the pressure of the liquid medium, improves the pressure boosting efficiency, but also reduces the energy consumption and equipment loss.

[0038] Exemplarily, the first hydraulic pressure is 30 MPa and the test hydraulic pressure is 250 MPa. A proportional valve and a pressure sensor are respectively provided at the outlets of the first hydraulic pump 310 and the second hydraulic pump 320 to achieve precise control of the liquid medium pressure.

[0039] Exemplarily, the outlet end of the hydraulic assembly 300 includes: a variable-temperature hydraulic detection port 330 and a normal-temperature hydraulic detection port 340. The outlet end of the second hydraulic pump 320 is respectively connected to the variable-temperature hydraulic detection port 330 and the normal-temperature hydraulic detection port 340. The variable-temperature hydraulic detection port 330 is connected to the test assembly 400, and the normal-temperature hydraulic detection port 340 is connected to the valve under test 10 to test the valve under test 10 at normal temperature.

[0040] In some embodiments provided by the present application, such as Figure 3As shown in the figure, the air pressure assembly 200 includes: an air storage cylinder 210, a first air pump 220, a second air pump 230, and a third air pump 240. The inlet end of the first air pump 220 is connected to the air storage cylinder 210. The inlet end of the second air pump 230 is connected to the outlet end of the first air pump 220. The inlet end of the third air pump 240 is connected to the outlet end of the second air pump 230. The outlet end of the third air pump 240 is connected to the input end of the test assembly 400. The working pressure of the third air pump 240 is greater than that of the second air pump 230, and the working pressure of the second air pump 230 is greater than that of the first air pump 220.

[0041] In this embodiment, the air storage cylinder 210 is used to store and output the gas medium, and the air storage cylinder 210 can be a high-pressure gas cylinder. The first air pump 220 is a low-pressure air pump, the second air pump 230 is a medium-pressure air pump, and the third air pump 240 is a high-pressure air pump. The first air pump 220, the second air pump 230, and the third air pump 240 are connected in series between the air storage cylinder 210 and the test assembly 400.

[0042] It should be noted that the smaller the working pressure of the air pump, the larger the flow rate of the output gas medium.

[0043] The air pressure assembly 200 adopts the principle of multi-stage pressure boost. Specifically, when the test air pressure is less than the pressure threshold, it is confirmed that the test state is a low-air-pressure test, and the air pressure assembly 200 uses a large-flow low-pressure pump to quickly boost the pressure to the test air pressure. When the test pressure is greater than or equal to the pressure threshold, it is confirmed that the test state is a high-air-pressure test, and the first air pump 220 is turned on to quickly pre-fill the air through the low-pressure air pump, so that the pressure of the test gas quickly increases to the first air pressure P1. Then, the second air pump 230 is continuously turned on to boost the test gas to the second air pressure P2 through the medium-pressure air pump. Finally, the third air pump 240 is continuously turned on to boost the test gas to the test air pressure P3 through the high-pressure air pump, where P1 < P2 < P3.

[0044] Since the increase in air pressure is relatively slower than that of hydraulic pressure, by setting the first air pump 220, the second air pump 230, and the third air pump 240, the air pressure assembly 200 forms a three-stage pressurized air pressure system. The three-stage air pumps are used in combination. After the gas pressure reaches the preset intermediate value, it is switched to a small-flow high-pressure pump to accurately boost the final pressure to the test air pressure required for the test. The hierarchical control method not only shortens the time for the air pressure assembly 200 to boost the pressure of the gas medium, improves the pressure boost efficiency, but also reduces the energy consumption and equipment loss.

[0045] Exemplarily, the numbers of the first pneumatic pump 220, the second pneumatic pump 230, and the third pneumatic pump 240 are multiple respectively. Specifically, the numbers are both two. The first air pressure is 25 MPa, the second air pressure is 110 MPa, and the test air pressure is 210 MPa. Proportion valves and pressure sensors are respectively provided at the outlets of the first pneumatic pump 220, the second pneumatic pump 230, and the third pneumatic pump 240 to achieve precise control of the gas medium pressure.

[0046] Exemplarily, the outlet end of the pneumatic assembly 200 includes: a variable-temperature air pressure detection port 250 and a normal-temperature air pressure detection port 260. The outlet end of the third pneumatic pump 240 is respectively connected to the variable-temperature air pressure detection port 250 and the normal-temperature air pressure detection port 260. The variable-temperature air pressure detection port 250 is connected to the test assembly 400, and the normal-temperature air pressure detection port 260 is connected to the valve under test 10 to test the valve under test 10 in the normal-temperature state.

[0047] In some embodiments provided by the present application, the pneumatic assembly 200 further includes: a pressurizing device. The pressurizing device is connected to the gas storage cylinder 210, and the pressurizing device is used to increase the pressure of the gas medium in the gas storage cylinder 210.

[0048] In this embodiment, the pressurizing device is used to increase the pressure of the gas medium in the gas storage cylinder 210, improve the pressure of the gas medium output by the gas storage cylinder 210, and enable the pneumatic assembly 200 to have a pre-charging function. Before starting the first pneumatic pump 220, first use the pressurizing device to increase the pressure of the gas medium in the gas storage cylinder 210 to the pre-charging pressure, and directly transport the gas medium to the valve under test 10 bypassing the pneumatic pump, so that the pressure of the valve under test 10 is equal to the pre-charging pressure. Then, start the pneumatic pump in sequence for further pressurization. The pressurizing device can perform pre-charging before the three-stage pressurization operation, further reduce the pressurization time of the high-pressure gas medium, improve the test efficiency, and save the test time.

[0049] Exemplarily, the pre-charging pressure is 12 MPa.

[0050] In some embodiments provided by the present application, as Figure 4 shown, the test assembly 400 includes: a low-pressure air inlet 410, a first outlet 420, a second outlet 430, a first input pipeline 440, a first output pipeline 450, a second input pipeline 460, and a second output pipeline 470. The low-pressure air inlet 410 is connected to the pneumatic assembly 200. The first outlet 420 and the second outlet 430 are respectively used to connect to both ends of the valve under test 10. The first input pipeline 440 connects the low-pressure air inlet 410 and the first outlet 420. The first output pipeline 450 connects the second outlet 430 and the first pressure relief port 30. The second input pipeline 460 connects the low-pressure air inlet 410 and the second outlet 430. The second output pipeline 470 connects the first outlet 420 and the second pressure relief port 40.

[0051] In this embodiment, when the confirmation test status is a low-pressure test, the air pressure assembly 200 is communicated with the test assembly 400 through the low-pressure air inlet 410. The output end of the test assembly 400 includes a first outlet 420 and a second outlet 430. The first outlet 420 and the second outlet 430 are respectively used to connect the two ends of the valve 10 to be tested, so as to test both sides of the valve plate of the valve 10 to be tested.

[0052] Control valves are provided on the first input pipeline 440, the first output pipeline 450, the second input pipeline 460 and the second output pipeline 470 to control the on-off of the pipelines. After the gas medium enters the test assembly 400 through the low-pressure air inlet 410, there are two test schemes. When the test assembly 400 executes the first test scheme, the first input pipeline 440 and the first output pipeline 450 are in a connected state, and the second input pipeline 460 and the second output pipeline 470 are in a disconnected state. The gas medium enters the first outlet 420 through the first input pipeline 440, flows through the valve 10 to be tested and then flows out through the second outlet 430, and enters the first pressure relief port 30 along the first output pipeline 450 to test one end of the valve 10 to be tested.

[0053] When the test assembly 400 executes the second test scheme, the first input pipeline 440 and the first output pipeline 450 are in a disconnected state, and the second input pipeline 460 and the second output pipeline 470 are in a connected state. The gas medium enters the second outlet 430 through the second input pipeline 460, flows through the valve 10 to be tested and then flows out through the first outlet 420, and enters the second pressure relief port 40 along the second output pipeline 470 to test the other end of the valve 10 to be tested.

[0054] The test assembly 400 can perform performance tests on both ends of the valve 10 to be tested, enriching the test function of the valve and improving the flexibility and versatility of valve testing.

[0055] In some embodiments provided by the present application, as Figure 4 shown, the test assembly 400 further includes: a high-pressure air inlet 481, a high-pressure liquid inlet 482 and a third input pipeline 490. The high-pressure air inlet 481 is connected to the air pressure assembly 200, the high-pressure liquid inlet 482 is connected to the hydraulic assembly 300, the inlet end of the third input pipeline 490 is respectively connected to the high-pressure air inlet 481 and the high-pressure liquid inlet 482, and the outlet end of the third input pipeline 490 is connected to the first outlet 420.

[0056] In this embodiment, the test medium for the high-pressure test is a high-pressure medium. The maximum test pressure supplied by the high-pressure medium is ≥250 Mpa. The high-pressure medium includes a high-pressure gas medium and a high-pressure liquid medium. When it is confirmed that the test state is a high-pressure gas test, the gas pressure assembly 200 communicates with the test assembly 400 through the high-pressure air inlet 481. When it is confirmed that the test state is a high-pressure liquid test, the hydraulic pressure assembly 300 communicates with the test assembly 400 through the high-pressure liquid inlet 482.

[0057] After the high-pressure medium enters the test assembly 400, it enters the first outlet 420 through the third input pipeline 490, flows through the valve under test 10 and then flows out through the second outlet 430, and enters the first pressure relief port 30 along the first output pipeline 450 to perform a high-pressure test on the valve under test 10. High-pressure tests and low-pressure tests can be respectively performed through the first output pipeline 450, improving the utilization efficiency of the first output pipeline 450 and optimizing the pipeline layout.

[0058] Exemplarily, the inlet end of the first input pipeline 440 and the inlet end of the second output pipeline 470 are located on the third input pipeline 490 to reduce the required pipelines and simplify the structural layout.

[0059] In some embodiments provided by the present application, as Figure 5 shown, the temperature regulation assembly 120 includes: a heating module 121 and a cascade refrigeration module 122. The heating module 121 is arranged in the installation box 110, and the heating module 121 is used to increase the temperature in the installation box 110. The cascade refrigeration module 122 is arranged in the installation box 110, and the cascade refrigeration module 122 is used to decrease the temperature in the installation box 110.

[0060] In this embodiment, the installation box 110 is provided with a heating module 121 and a cascade refrigeration module 122 to regulate the temperature in the installation box 110.

[0061] The heating module 121 includes a heater. The heater uses an explosion-proof heater and is heated by an explosion-proof nickel alloy electric heating wire. Through the PID (proportional-integral-derivative) control method, a non-contact equal-period pulse width modulation solid-state relay is used. The heating module 121 further includes a channel thermal protection device. The channel thermal protection device alarms when the temperature in the installation box 110 exceeds the critical allowable temperature and cuts off the heater to protect the system and the valve under test 10.

[0062] The cascade refrigeration module 122 adopts cascade refrigeration. Cascade refrigeration is a method that divides a large total temperature difference into several segments, uses a suitable refrigerant cycle for each segment, then superimposes them, and uses the refrigerating capacity of the high-temperature stage to bear the condensing load of the low-temperature stage, thereby obtaining a lower refrigeration temperature. This refrigeration method consists of two to three independent vapor compression refrigeration cycles with different operating temperature ranges, and has stable operation and high refrigeration efficiency. The cascade refrigeration module 122 includes a Bitzer cascade unit. The cascade refrigeration module 122 has functions of energy regulation and overpressure protection, and the cascade refrigeration module 122 is automatically regulated in terms of energy and protected through software. Through the energy regulation technology, it can not only ensure the normal operation of the cascade refrigeration module 122, but also effectively regulate the energy consumption and refrigerating capacity of the cascade refrigeration module 122, so that the cascade refrigeration module 122 maintains the best operating state.

[0063] Adopting the balanced temperature control method (BTHC, Balanced Temperature and Humidity Control), when the cascade refrigeration module 122 is continuously operating, the control device 800 controls the output of the heating module 121 according to the result automatically calculated by PID based on the set temperature point, and finally achieves a dynamic balance.

[0064] Through the heating module 121 and the cascade refrigeration module 122, the temperature regulation range of the temperature regulation component 120 is expanded, and precise control of the ambient temperature is achieved. Specifically, the temperature range inside the installation box 110 is from -70°C to 400°C, the temperature fluctuation ≤ ±0.5°C, the temperature uniformity ≤ 2.0°C, and the cooling rate is 0.2 - 0.5°C / min (load). The temperature control accuracy of the heating module 121 and the cascade refrigeration module 122 ≤ ±0.5°C, and the high-temperature heating time of the empty box ≤ 180 min.

[0065] Exemplarily, the temperature regulation component 120 further includes a temperature sensor. The temperature sensor is used to monitor the ambient temperature inside the installation box 110 in real time and feedback it to the control device 800 to ensure the accuracy of temperature control and realize the acquisition and automatic control of the temperature inside the installation box 110.

[0066] In some embodiments provided in the present application, as Figure 5 shown, the installation component 100 further includes: a pressure balance module 130. The pressure balance module 130 is arranged in the installation box 110, and the pressure balance module 130 is used to make the air pressure inside and outside the installation box 110 the same.

[0067] In this embodiment, the air pressure balance module 130 can be a pneumatic balancer. The air pressure balance module 130 can ensure that the air pressure inside the installation box 110 is always consistent with the external air pressure during the heating, cooling, and constant temperature tests of the installation box 110, reducing the air pressure interference on the valve under test 10 during the test and improving the accuracy and safety of the test results of the valve under test 10.

[0068] In some embodiments provided by the present application, as Figure 5 shown, the valve test system further includes: a driving member 500, a torque sensor 600, a data acquisition member 700, and a control module. The torque sensor 600 is used to connect the valve under test 10 and the driving member 500. The data acquisition member 700 is respectively connected to the installation assembly 100, the air pressure assembly 200, the hydraulic assembly 300, and the test assembly 400. The control module is used to obtain the detection data of the data acquisition member 700 and the torque sensor 600, confirm that the detection data exceeds the preset range, and output an alarm message.

[0069] In this embodiment, the driving member 500 can be a motor. The driving member 500 applies torques in different directions to the valve under test 10 to achieve the opening and closing actions of the valve under test 10. The torque sensor 600 is used to measure the number of turns and torque in the switching operation in real time. The torque sensor 600 can set the upper limits of the number of turns and torque to avoid overloading of the number of turns. The torque measurement accuracy of the torque sensor 600 is 0.5% FS.

[0070] The torque sensor 600 and the driving member 500 are connected to the control device 800. The control device 800 is used to display the measured values of the torque and the number of turns by the torque sensor 600, and store and export the measurement data. The measurement accuracy of the torque sensor 600 is 0.5% FS. The control device 800 realizes the automatic control of the opening and closing of the valve under test 10 through a PLC. The valve under test 10 has multiple control modes, such as manual, automatic, and remote control, reducing the manual workload, improving the driving efficiency of the valve under test 10, and testing the operating torque of the opening and closing of the valve under test 10, and cooperating with the hydraulic assembly 300 and the air pressure assembly 200 to implement tests such as dynamic on / off cycle pressure of the valve under test 10 at normal temperature, high temperature, and low temperature.

[0071] Exemplarily, the driving member 500 is provided with an inverter, and the inverter is used to adjust the rotation speed of the driving member 500 to achieve adjustable rotation speed.

[0072] The data acquisition component 700 includes a temperature sensor and a pressure sensor. The pressure control accuracy of the pressure sensor is ≤ 1% FS. The data acquisition component 700 is connected to the control device 800, enabling the control device 800 to obtain the temperature inside the installation box 110 and the operating pressures of the hydraulic component 300 and the pneumatic component 200. The control device 800 can monitor the operating status of the test system in real time, store and export the detection data, support the traceability of the detection data, and facilitate quality management and problem troubleshooting. By obtaining the detection data, the test process can be intelligently managed. When the detection data exceeds the preset range, the control device 800 can output an alarm message to prompt the staff to handle it in a timely manner.

[0073] The control device 800 includes a graphical operation interface, enabling users to operate and view the results through a touch screen or a PC.

[0074] In the second aspect of the present application, an embodiment provides a valve test method, as Figure 6 shown. This valve test method utilizes the valve test system provided in any of the above first aspect embodiments. The valve test method includes:

[0075] Step 101, obtain the test status of the valve to be tested;

[0076] Step 102, when it is confirmed that the test status is a high hydraulic pressure test, turn on the first hydraulic pump to make the hydraulic pressure inside the valve to be tested reach the first hydraulic pressure;

[0077] Step 103, turn off the first hydraulic pump and turn on the second hydraulic pump to make the hydraulic pressure inside the valve to be tested reach the test hydraulic pressure;

[0078] Step 201, when it is confirmed that the test status is a high pneumatic pressure test, turn on the first pneumatic pump to make the pneumatic pressure inside the valve to be tested reach the first pneumatic pressure;

[0079] Step 202, turn on the second pneumatic pump to make the pneumatic pressure inside the valve to be tested reach the second pneumatic pressure;

[0080] Step 203, turn on the third pneumatic pump to make the pneumatic pressure inside the valve to be tested reach the test pneumatic pressure.

[0081] In this embodiment, the hydraulic component adopts the principle of multi-stage pressure boost. Specifically, when the test hydraulic pressure is less than the pressure threshold, it is confirmed that the test status is a low hydraulic pressure test, and the hydraulic component uses a large-flow low-pressure pump to quickly boost the pressure to the test hydraulic pressure. When the test pressure is greater than or equal to the pressure threshold, it is confirmed that the test status is a high hydraulic pressure test. The hydraulic component first turns on the first hydraulic pump and quickly pre-fills the liquid through a low-pressure hydraulic pump to quickly increase the pressure of the test liquid to the first hydraulic pressure, and the first hydraulic pressure is less than the test hydraulic pressure. Then, turn off the first hydraulic pump and turn on the second hydraulic pump to boost the test liquid to the test hydraulic pressure through the high-pressure hydraulic pump.

[0082] By setting up the first hydraulic pump and the second hydraulic pump, a hydraulic system with two-stage supercharging is formed in the hydraulic component. The two-stage hydraulic pumps are used in combination. After the liquid pressure reaches the preset intermediate value, it is switched to a small-flow high-pressure pump to accurately increase the final pressure to the test hydraulic pressure required for the test. Through the hierarchical control method, not only the time for the hydraulic component to increase the pressure of the liquid medium is shortened, the pressure increase efficiency is improved, but also the energy consumption and equipment loss are reduced.

[0083] The pneumatic component adopts the principle of multi-stage pressure increase. Specifically, when the test air pressure is less than the pressure threshold, it is confirmed that the test state is a low-air-pressure test, and the pneumatic component uses a large-flow low-pressure pump to quickly increase the pressure to the test air pressure. When the test pressure is greater than or equal to the pressure threshold, it is confirmed that the test state is a high-air-pressure test, and the first pneumatic pump is turned on. Through the low-pressure pneumatic pump, rapid pre-inflation is carried out to quickly increase the pressure of the test gas to the first air pressure P1. Then, the second pneumatic pump is continuously turned on, and the test gas is pressurized to the second air pressure P2 through the medium-pressure pneumatic pump. Finally, the third pneumatic pump is continuously turned on, and the test gas is pressurized to the test air pressure P3 through the high-pressure pneumatic pump, where P1 < P2 < P3.

[0084] Since the increase in air pressure is relatively slower than that of hydraulic pressure, by setting up the first pneumatic pump, the second pneumatic pump and the third pneumatic pump, a pneumatic system with three-stage supercharging is formed in the pneumatic component. The three-stage pneumatic pumps are used in combination. After the gas pressure reaches the preset intermediate value, it is switched to a small-flow high-pressure pump to accurately increase the final pressure to the test air pressure required for the test. Through the hierarchical control method, not only the time for the pneumatic component to increase the pressure of the gas medium is shortened, the pressure increase efficiency is improved, but also the energy consumption and equipment loss are reduced.

[0085] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be construed as a limitation to the present invention.

[0087] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A valve testing system, characterized in that, Comprising: An installation component, the installation component includes an installation box and a temperature adjustment component. The installation box is used to accommodate the valve to be tested, and the temperature adjustment component can adjust the temperature inside the installation box; A pneumatic component for outputting a gas medium; A hydraulic component for outputting a liquid medium; A test component. The input ends of the test component are respectively connected to the pneumatic component and the hydraulic component, and the output end of the test component is connected to the installation component. The test component is used to control the connection states of the hydraulic component and the pneumatic component with the valve to be tested respectively.

2. The valve testing system according to claim 1, characterized in that The hydraulic component includes: A first hydraulic pump and a second hydraulic pump. The inlet ends of the first hydraulic pump and the second hydraulic pump are connected to the liquid inlet, and the outlet ends of the first hydraulic pump and the second hydraulic pump are connected to the input end of the test component. The working pressure of the second hydraulic pump is greater than that of the first hydraulic pump.

3. The valve testing system according to claim 1, wherein, The pneumatic component includes: A gas storage cylinder; A first pneumatic pump, the inlet end of the first pneumatic pump is connected to the gas storage cylinder; A second pneumatic pump, the inlet end of the second pneumatic pump is connected to the outlet end of the first pneumatic pump; A third pneumatic pump, the inlet end of the third pneumatic pump is connected to the outlet end of the second pneumatic pump, the outlet end of the third pneumatic pump is connected to the input end of the test component, the working pressure of the third pneumatic pump is greater than that of the second pneumatic pump, and the working pressure of the second pneumatic pump is greater than that of the first pneumatic pump.

4. The valve testing system according to claim 3, wherein The pneumatic component further includes: A pressurizing device connected to the gas storage cylinder. The pressurizing device is used to increase the pressure of the gas medium in the gas storage cylinder.

5. The valve testing system according to claim 1, characterized in that, The test component includes: A low-pressure air inlet connected to the pneumatic component; A first outlet and a second outlet, the first outlet and the second outlet are respectively used to connect the two ends of the valve to be tested; A first input pipeline connecting the low-pressure air inlet and the first outlet; A first output pipeline connecting the second outlet and a first pressure relief port; A second input pipeline connecting the low-pressure air inlet and the second outlet; A second output pipeline connecting the first outlet and a second pressure relief port.

6. The valve testing system according to claim 5, wherein, The test component further includes: A high-pressure air inlet connected to the pneumatic component; A high-pressure liquid inlet connected to the hydraulic component; A third input pipeline. The inlet end of the third input pipeline is respectively connected to the high-pressure air inlet and the high-pressure liquid inlet, and the outlet end of the third input pipeline is connected to the first outlet.

7. The valve testing system according to claim 1, characterized in that, The temperature adjustment component includes: A heating module provided in the installation box. The heating module is used to raise the temperature inside the installation box; A cascade refrigeration module provided in the installation box. The cascade refrigeration module is used to lower the temperature inside the installation box.

8. The valve testing system according to claim 1, wherein The installation component further includes: A pneumatic balance module provided in the installation box. The pneumatic balance module is used to make the air pressure inside and outside the installation box the same.

9. The valve testing system according to any one of claims 1 to 8, characterized in that, Further comprising: A driving member; A torque sensor for connecting the valve to be tested and the driving member; A data acquisition component respectively connected to the installation component, the pneumatic component, the hydraulic component and the test component; A control module, configured to obtain the detection data of the data acquisition component and the torque sensor, confirm that the detection data exceeds a preset range, and output an alarm message.

10. A valve testing method, using the valve testing system according to any one of claims 1 to 9, characterized in that The valve testing method includes: Obtaining the test status of the valve to be tested; When it is confirmed that the test status is a high hydraulic pressure test, turning on the first hydraulic pump to make the hydraulic pressure in the valve to be tested reach the first hydraulic pressure; Turning off the first hydraulic pump and turning on the second hydraulic pump to make the hydraulic pressure in the valve to be tested reach the test hydraulic pressure; When it is confirmed that the test status is a high air pressure test, turning on the first air pressure pump to make the air pressure in the valve to be tested reach the first air pressure; Turning on the second air pressure pump to make the air pressure in the valve to be tested reach the second air pressure; Turning on the third air pressure pump to make the air pressure in the valve to be tested reach the test air pressure.

Images