Electro-hydraulic remote control valve low temperature performance test device and test method

Abstract

The present application relates to valve test technical field, disclose a kind of electro-hydraulic remote control valve low temperature performance test device, including low temperature performance test box and test equipment, the low temperature performance test box is equipped with refrigeration device, low temperature sudden drop area, icing test area, air-tightness test area and test buffer area, low temperature performance test box provides installation and debugging environment for each test area;Refrigeration device is located at the first end of low temperature performance test box, low temperature sudden drop area is adjacent to refrigeration device, icing test area is adjacent to low temperature sudden drop area, air-tightness test area is adjacent to icing test area, test buffer area is adjacent to air-tightness test area.The low temperature performance test device of the present application includes multiple test areas, including low temperature sudden drop anticipation, icing test area, confidentiality test area, buffer test area, can adjust test area parameters and carry out combination split according to test demand, to carry out all-around test to valve under low temperature environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve test, in particular to a low-temperature performance test device and test method for electro-hydraulic remote control valve. BACKGROUND

[0002] The Arctic region is rich in resources and of important strategic value. With the continuous extension of the navigation window period of the Arctic route, the polar equipment in service has to withstand harsh natural environmental factors, and the equipment failure is very serious.

[0003] Low temperature has a certain impact on almost all matrix materials, especially for electro-hydraulic remote control valves. Low temperature can cause material hardening and embrittlement, part seizure and interference, and reduced lubrication, which affects the normal opening and closing of the valve and causes navigation danger. Therefore, it is particularly important to carry out low-temperature test, which aims to examine the adaptability of electro-hydraulic remote control valve under low temperature and icing conditions, and to deeply understand the influence of low temperature on its working performance, safety and integrity.

[0004] Therefore, it is necessary to provide a test device and test method capable of verifying the performance of electro-hydraulic remote control valve at low temperature, so as to improve the independent research and development capability and reliability of polar equipment in China. SUMMARY

[0005] The technical problem to be solved by the present application is the imperfect low-temperature performance test means for valves.

[0006] In order to solve the above technical problems, the technical scheme of the present application is to provide a low-temperature performance test device for electro-hydraulic remote control valve, comprising a low-temperature performance test box and a test equipment, wherein the low-temperature performance test box is provided with a refrigeration device, a low-temperature sudden drop area, an icing test area, an airtightness test area and a test buffer area, and the refrigeration device is provided with a cascade refrigeration system for providing a low-temperature test environment temperature for the test equipment.

[0007] The low-temperature performance test box provides installation and debugging environment for each test area;

[0008] The refrigeration device is arranged at the first end of the low-temperature performance test box, and the cascade refrigeration system is arranged in the refrigeration device for providing a low-temperature test environment temperature for the test equipment;

[0009] The low-temperature sudden drop area is adjacent to the refrigeration device, and a movable axial flow fan is arranged in the low-temperature sudden drop area for low-temperature sudden drop test of the test equipment;

[0010] The icing test area is adjacent to the low-temperature sudden drop area, and an ice accumulation test device is arranged in the icing test area for low-temperature icing test of the test equipment;

[0011] The airtightness test area is adjacent to the icing test area, and an airtightness test device is arranged in the airtightness test area for low-temperature airtightness test of the test equipment;

[0012] The test buffer area is adjacent to the air tightness test area and is located at the end of the low temperature performance test box, and is used for function size inspection after the test of the test equipment.

[0013] Optionally, the low temperature performance test box is provided with a refrigeration air inlet and a refrigeration return air outlet between the refrigeration device and the low temperature sudden drop area, and between the air tightness test area and the test buffer area, and the refrigeration air inlet and the refrigeration return air outlet are respectively provided with temperature sensors and fences.

[0014] Optionally, the low temperature performance test box is provided with a low temperature explosion-proof camera, a low temperature explosion-proof illuminating lamp and a data communication port in the low temperature sudden drop area, the icing test area and the air tightness test area, the low temperature explosion-proof camera is provided with a heating device, and the data communication port is provided with a heat insulation plug.

[0015] Optionally, the low temperature performance test box is provided with an observation window made of transparent electric heating film hollow tempered glass, and the low temperature performance test box is provided with an insulation board outside.

[0016] Optionally, the icing test device comprises an external icing device, an internal icing device and a wind speed and direction and temperature and humidity acquisition instrument, the external icing device is located above the internal icing device, and the two are separated by a partition, and the temperature and humidity acquisition instrument is located in the external icing device and the internal icing device.

[0017] Optionally, the icing test device is provided with a spraying device, the spraying device comprises a spray head, a spraying rack, an air pipe and a water pipe, the spraying rack is provided with a movable fixing support, the spray head is arranged on the fixing support and connected with the water pipe and the air pipe respectively, and the spraying device is provided with a flow meter and a pressure sensor.

[0018] Optionally, the icing test area is provided with a water collecting tray, a plurality of holes are arranged on the water collecting tray, and a water flowing groove and a water outlet are arranged on the bottom plate of the icing test area.

[0019] Optionally, the air tightness test device comprises a fixed rack, a fixed claw and a telescopic column, a plurality of telescopic columns are arranged on the fixed rack, the fixed claw is arranged on the upper end of the telescopic column and used for clamping the test equipment, and the fixed rack is provided with a water filling area.

[0020] A test method of an electro-hydraulic remote control valve low temperature performance test device,

[0021] The test method comprises the following steps:

[0022] s100, selecting an electro-hydraulic remote control valve sample as a test equipment, performing appearance inspection and material inspection, and meeting the technical requirements, technical data and proof documents are consistent;

[0023] s110, check the insulation resistance between the power supply of the test device and the ground, and perform a function check;

[0024] s120, perform a low-temperature sudden drop test, place the test device in a low-temperature sudden drop area, the test device is not powered on, set the environmental temperature, wait for the temperature of the test device to drop to the test temperature, power on to perform a function check of the test device, the switch function of the test device is normal, and the feedback signal is correct;

[0025] s130, perform a low-temperature test, wait for the surface temperature of the test device to reach the test temperature, maintain for a certain period of time, power on to perform a function check of the test device, the switch function of the test device is normal, and the feedback signal is correct;

[0026] s140, perform an external icing test, place the test device in an external icing device, wait for the temperature of the test device to reach the test temperature, perform ice accumulation on the test device, wait for the ice thickness to reach the requirement, maintain for a certain period of time, break the ice, and then power on to perform a function check of the test device, the switch function of the test device is normal, and the feedback signal is correct;

[0027] s150, perform an internal icing test, place the test device in an internal icing device, wait for the temperature of the test device to reach the test temperature, perform ice accumulation on the test device, wait for the ice thickness to reach the requirement, maintain for a certain period of time, break the ice, and then power on to perform a function check, the switch function is normal, and the feedback signal is correct;

[0028] s160, perform an airtightness test, place the test device on a fixed rack in an airtightness test area, adjust the valve of the test device to the closed position, fill the inlet pipe end of the test device with water, and apply pressure from the inlet end to perform a sealing test, which meets the test pressure and test time requirements.

[0029] Optionally, in steps s100 to s160, if the current working performance of the test device does not meet the requirement of the actual working performance requirement, it is determined that the performance of the test device is not up to standard, and the subsequent test steps are stopped.

[0030] In summary, the present application has at least one of the following beneficial effects:

[0031] The low-temperature performance test device can simulate a temperature range of-70℃-80℃, not only can simulate low-temperature environment, normal temperature environment and high-temperature environment, but also can simulate temperature sudden drop and high-low temperature change environment, so as to verify the thermal expansion performance of the valve under low temperature.

[0032] The low-temperature performance test device of the application includes various test areas, unlike the existing single low-temperature test box verification method, and includes low-temperature sudden drop anticipation, icing test area, confidentiality test area, buffer test area, and can adjust test area parameters and combine and split according to test requirements, so as to comprehensively test the valve under low-temperature environment.

[0033] The test method of the application can be combined according to test requirements, and is aimed at low-temperature including low-temperature sudden drop and low-temperature test, and aimed at icing including external icing and internal icing, and through reasonable test combination sequence, the quality of valve low-temperature performance test is improved, so as to ensure good performance of the valve under low-temperature. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a low-temperature performance test device schematic diagram of the electro-hydraulic remote control valve of the application;

[0035] Figure 2 It is a freezing test structure schematic diagram of the electro-hydraulic remote control valve of the application;

[0036] Figure 3 It is a gas tightness test fixed rack structure schematic diagram of the electro-hydraulic remote control valve of the application;

[0037] Figure 4 It is a test method flow chart schematic diagram of the application;

[0038] In the figure: 100, low-temperature performance test box; 101, refrigeration air inlet; 102, refrigeration return air outlet; 103, low-temperature explosion-proof camera; 104, low-temperature explosion-proof lighting lamp; 105, data communication port; 200, refrigeration device; 201, cascade refrigeration system; 300, low-temperature sudden drop area; 301, movable axial flow fan; 400, icing test area; 401, ice accumulation test device; 402, external icing device; 403, internal icing device; 404, wind speed, wind direction and temperature and humidity acquisition instrument; 500, gas tightness test area; 501, gas tightness test device; 502, fixed rack; 503, fixed jaw; 504, telescopic column; 505, water filling area; 600, test buffer area; 700, test equipment; 701, external icing area; 702, internal icing area; 703, connecting rod; 705, valve driving head. DETAILED DESCRIPTION

[0039] The application will be further described in detail below. Figures 1-4 The application will be further described in detail below.

[0040] The application discloses a low-temperature performance test device for electro-hydraulic remote control valve, which refers to Figure 1, including a low-temperature performance test box 100 and a test device 700, the low-temperature performance test box 100 is provided with a refrigeration device 200, a low-temperature sudden drop area 300, a freezing test area 400, an airtight test area 500 and a test buffer area 600, wherein,

[0041] The low-temperature performance test box 100 provides installation and debugging environment for each test area, can set various parameters, control the environmental temperature, and open the lighting, data recording and video recording functions;

[0042] The refrigeration device 200 is arranged at the first end of the low-temperature performance test box 100, and is provided with a cascade refrigeration system 201 therein, which is used to provide a low-temperature test environment temperature for the test device 700, and can simulate a temperature range of -70℃ to +80℃;

[0043] Specifically, the refrigeration device 200 further includes a refrigeration compressor, an evaporator, a condenser, a throttling device, a plate-type exchanger and a control system, etc., which can automatically adjust the operating condition of the refrigeration machine according to the test conditions, and the cascade refrigeration system 201 is provided with safety protection devices, including compressor overheating protection, compressor overcurrent protection, compressor overpressure protection, condensing fan overheating protection, and three-phase power overvoltage, undervoltage, open-phase and phase-type protection, etc., to avoid accidents;

[0044] The low-temperature sudden drop area 300 is adjacent to the refrigeration device 200, and is provided with a movable axial flow fan 301 therein, which is used for low-temperature sudden drop test of the test device 700;

[0045] Specifically, a wind speed and direction collection instrument is arranged in front of the movable axial flow fan 301, and the movable axial flow fan 301 is connected with a control system, which is used to adjust the environmental wind speed, accelerate the reduction of the valve surface temperature, and calibrate the temperature before the test of the low-temperature sudden drop area 300;

[0046] The freezing test area 400 is adjacent to the low-temperature sudden drop area 300, and is provided with an ice accumulation test device 401 therein, which is used for low-temperature freezing test of the test device 700;

[0047] Specifically, the ice accumulation test device 401 comprises an external icing device 402, an internal icing device 403, and a wind speed and direction and temperature and humidity collector 404. The external icing device 402 is located above the internal icing device 403, and the two are separated by a partition. The temperature and humidity collector 404 is located in the external icing device 402 and the internal icing device 403. The ice accumulation test device 401 is provided with a spraying device. The spraying device comprises a spray head, a spraying rack, an air pipe, and a water pipe. The spraying rack is provided with a movable fixing support. The spray head is arranged on the fixing support and connected with the water pipe and the air pipe respectively. The number of the spray head can be installed and removed according to the number of test requirements, for spraying water mist to the test equipment 700 to generate ice accumulation. The spraying device is provided with a flow meter and a pressure sensor for measuring the water supply flow and air supply pressure of the spraying device. The spraying rack is provided with a control console for controlling the water flow, spray size, water temperature, and air pressure of the spraying device. The ice accumulation test area 401 is provided with a water accumulation tray. The water accumulation tray is provided with a plurality of holes. The bottom plate of the ice accumulation test area 401 is provided with a water flow groove and a water outlet for drainage after the water spraying test under certain temperature conditions.

[0048] The airtightness test area 500 is adjacent to the icing test area 400 and is provided with an airtightness test device 501 for low-temperature airtightness test of the test equipment 700.

[0049] Specifically, referring to Figure 3 , the airtightness test device 501 comprises a fixed rack 502, a fixed claw 503, and a telescopic column 504. The telescopic column 504 is provided with a plurality of telescopic columns and is arranged on the fixed rack 502. The fixed claw 503 is arranged on the upper end of the telescopic column 504 and is used for clamping and fixing the test equipment 700. The airtightness test device 501 further comprises an operation platform. The operation platform can set the pressure required by different valves, so as to test the sealing performance of the valve under different pressures. The fixed rack 502 is provided with a water filling area 505.

[0050] The test buffer area 600 is adjacent to the airtightness test area 500 and is located at the end of the low-temperature performance test box 100. The test buffer area 600 is used for function and size inspection of the test equipment 700 after test. Various instruments and meters such as a vernier caliper, an ammeter, a point temperature gun, and a wooden hammer can be placed in the test buffer area 600, which is used for functional test of the valve.

[0051] In further embodiments, the refrigeration inlet 101 and the refrigeration return air outlet 102 are arranged between the refrigeration device 200 and the low-temperature sudden drop area 300 of the low-temperature performance test box 100 and between the airtightness test area 500 and the test buffer area 600. The temperature sensor and the fence are arranged on the refrigeration inlet 101 and the refrigeration return air outlet 102. The temperature sensor is used for monitoring the inlet air temperature and the return air temperature. The fence is used for placing sundries.

[0052] The low-temperature performance test device is provided with a low-temperature explosion-proof camera 103, a low-temperature explosion-proof illuminating lamp 104 and a data communication port 105 in the low-temperature sudden drop area 300, the icing test area 400 and the air tightness test area 500. The low-temperature explosion-proof camera 103 is provided with a heating device to prevent the camera from fogging in a low-temperature environment. The data communication port 105 is used to pass the connection lines of the control lines and sensors of the valve to the outside of the test box, and is provided with a heat insulation plug to prevent cold loss when not in use. The low-temperature explosion-proof illuminating lamp 104 is provided with multiple spare parts to replace the damaged parts in the low-temperature experiment. The low-temperature performance test device 100 is provided with an observation window made of transparent electric heating film hollow tempered glass. The low-temperature performance test device 100 is provided with heat preservation measures outside, including but not limited to heat preservation plates, to prevent cold loss.

[0053] A test method of the low-temperature performance test device of the electro-hydraulic remote control valve, referring to Figure 4 , comprises the following steps:

[0054] s100, select an electro-hydraulic remote control valve sample as a test equipment 700, and perform appearance inspection and material inspection. The technical requirements, technical data and proof documents are consistent, and the main materials and components of the test equipment 700 can meet the low-temperature use requirements. Then, according to the test valve, sensors are selected and arranged. The sensors include a valve surface temperature sensor, a space temperature sensor, a wind speed and direction sensor and a humidity sensor. The valve surface temperature sensor is attached to the surface of the valve body, the space temperature sensor is arranged around the valve body, and the wind speed and direction sensor and the humidity sensor are arranged in front of the valve body.

[0055] Specifically, referring to Figure 2 , the electro-hydraulic remote control valve sample comprises an external icing area 701, an internal icing area 702, a connecting rod 703 and a valve driving head 705.

[0056] This step also includes test preparation, such as placing the test equipment 700, connecting the control system, tool preparation and the like. The tools used include megohmmeter, clamp meter, multimeter, pressure gauge (air tightness test), emergency hand pump, point thermometer (temperature measurement), vernier caliper, timer, flashlight, wooden hammer, cold-proof gloves and cold-proof clothes and the like.

[0057] s110, check the insulation resistance between the power supply phase and the ground of the test equipment 700, and perform function inspection.

[0058] Specifically, it also includes size inspection and appearance inspection, which checks the outer surface of the test equipment and pipeline components by visual method, checks the surface paint film, color, nameplate, identification and part size of main components of the test equipment, and size inspection includes valve body inner diameter measurement, valve plate outer diameter measurement, valve neck bearing inner diameter measurement, valve stem outer diameter measurement, gear measurement, rack measurement, liquid lever inner diameter measurement, piston outer diameter measurement and oil temperature measurement, appearance inspection includes checking whether the valve body appearance structure is neat, whether there is rust and paint peeling phenomenon, whether the internal structure is loose, whether the connection line is firm and reliable, whether the touch is flexible, etc., and the insulation resistance inspection uses a 500V megohmmeter to test the insulation resistance between the power supply phase and ground of the test equipment;

[0059] s120, low temperature sudden drop test is carried out, the test equipment 700 is placed in the low temperature sudden drop area 300, the test equipment 700 is not powered on, the environmental temperature is set, the temperature of the test equipment 700 is reduced to the test temperature, the power is turned on to carry out the function test of the test equipment 700, the switch function of the test equipment 700 is normal, and the feedback signal is correct;

[0060] Specifically, the valve hydraulic oil sample and the low temperature sudden drop observation test of the accessories and accessories should also be carried out, the hydraulic oil sample, the accessories and the accessories are placed in the low temperature sudden drop area, and the state of the sample under low temperature is observed;

[0061] s130, low temperature test is carried out, the surface temperature of the test equipment 700 reaches the test temperature, the valve body temperature is measured by using a point thermometer, the valve body temperature needs to be consistent with the low temperature test temperature, a certain time is kept, the power is turned on to carry out the function test of the test equipment 700, the switch function of the test equipment 700 is normal, and the feedback signal is correct;

[0062] s140, external icing test is carried out, the external icing area 701 of the test equipment 700 is placed in the external icing device 402, the temperature of the test equipment 700 reaches the test temperature, the external icing area 701 of the test equipment 700 is iced, the ice thickness reaches the requirement, a certain time is kept, the ice is broken, the power is turned on to carry out the function test of the test equipment 700, the switch function of the test equipment 700 is normal, and the feedback signal is correct;

[0063] Specifically, during the external icing test, the box temperature needs to be reduced to one of the test temperatures in the test conditions, and this temperature is kept, the valve body temperature is measured by using a point thermometer, the valve body temperature needs to be consistent with the expected environmental temperature, during icing, the connecting rod 703 and the valve drive head 705 should have the same thickness of ice, during icing, the corresponding spraying intensity and icing thickness of the valve icing test are obtained, and the water spraying amount and the spraying water mist intensity of the spraying device are adjusted according to the spraying intensity and the icing thickness;

[0064] s150, an internal icing test is performed, the internal icing area 702 of the test device 700 is placed in the internal icing device 403, the temperature of the test device 700 reaches the test temperature, the internal icing area 702 of the test device 700 is iced, the ice thickness reaches the requirement, a certain time is kept, the ice is broken, and the function is checked after power-on, the switch function is normal, and the feedback signal is correct;

[0065] Specifically, in the internal icing test, a point thermometer is used to measure the valve body temperature, the valve body temperature needs to be consistent with the expected environment temperature, and the ice accumulation part of the internal icing test at least includes the shaft sleeve and the shaft and the valve plate and the valve seat;

[0066] s160, a gas tightness test is performed, the test device 700 is placed on the fixed rack 502 in the gas tightness test area 500, and the test device 700 is fixed by the fixed jaw 503 and the telescopic column 504, the valve of the test device 700 is adjusted to the closed position, the inlet pipe end of the test device 700 is filled with water, and the water filling area 505 is sealed, the sealing test is performed by applying pressure from the inlet end, the test pressure is not less than 1.1 times the rated working pressure of the test device 700, and the test time is not less than 120 seconds;

[0067] Specifically, it also includes a thermal expansion test, after the low temperature test, the valve is placed at room temperature, and it is ensured that the valve body and the driving device are consistent with the environment temperature, the remote control opening and closing actions of the valve are tested, and the manual opening and closing actions after connecting the emergency hand pump are tested, and then the tightness test is performed; after the test is completed, the size inspection is performed, the size changes of the key components under temperature changes are collected, the main parts of the test device are inspected, there is no wear and damage, and the related data are recorded.

[0068] In further embodiments, in steps s100 to s160, if the current working performance of the test device 700 does not meet the requirements of the actual working performance requirements, it is determined that the performance of the test device 700 is not up to standard, and the subsequent test steps are stopped, in the external icing test, water not more than 2°C is used to ice the external surface of the test device 700 every 10 minutes until the thickness reaches at least 5mm, after the test is completed, the test device 700 should be able to break the ice by the manual device, and then perform the remote control opening and closing actions and the manual opening and closing actions after connecting the emergency hand pump, after the icing test, the test device 700 is placed in a room temperature environment, the valve body temperature is measured by using a point thermometer, the valve body temperature is consistent with the environment temperature, obvious water droplets can be wiped off by hand, and the insulation resistance is measured.

[0069] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0070] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. An electro-hydraulic remote control valve cryogenic performance test device, characterized by, The test chamber includes a low-temperature performance test chamber (100) and a test device (700). The low-temperature performance test chamber (100) is equipped with a refrigeration device (200), a low-temperature drop zone (300), an icing test zone (400), an airtightness test zone (500), and a test buffer zone (600). The low-temperature performance test chamber (100) provides an installation and commissioning environment for each test area; The refrigeration device (200) is located at the front end of the low temperature performance test chamber (100), and is equipped with a cascade refrigeration system (201) to provide the low temperature test environment temperature for the equipment under test (700); The low temperature drop zone (300) is adjacent to the refrigeration unit (200) and is equipped with a movable axial flow fan (301) for the low temperature drop test of the equipment under test (700); The icing test area (400) is adjacent to the low temperature drop area (300), and an icing test device (401) is provided therein for the low temperature icing test of the equipment under test (700); The air tightness test area (500) is adjacent to the icing test area (400), and an air tightness test device (501) is provided therein for the low-temperature air tightness test of the equipment under test (700); The test buffer area (600) is adjacent to the airtightness test area (500) and located at the end of the low temperature performance test chamber (100), and is used for functional dimension inspection of the tested equipment (700) after the test; The icing test device (401) includes an external icing device (402), an internal icing device (403), and a wind speed, wind direction, and temperature and humidity acquisition instrument (404). The external icing device (402) is located above the internal icing device (403), and the two are separated by a partition. The temperature and humidity acquisition instrument (404) is located inside the external icing device (402) and the internal icing device (403). The test device (700) is an electrically controlled remote valve sample, including an external icing area (701), an internal icing area (702), a connecting rod (703), and a valve drive head (705). The low-temperature icing test includes an external icing test and an internal icing test. During the external icing test, the external icing area (701) of the test device (700) is placed inside the external icing device (402), and the connecting rod (703) and the valve drive head (705) are covered with ice of the same thickness. During the internal icing test, the internal icing area (702) of the test equipment (700) is placed inside the internal icing device (403), and the valve body temperature is measured using a spot thermometer. The valve body temperature must be consistent with the expected ambient temperature. The icing areas in the internal icing test include at least the area between the bushing and the shaft of the electrically controlled remote valve sample and the area between the valve plate and the valve seat.

2. The electro-hydraulic remote control valve cryogenic performance test device according to claim 1, characterized in that, The low-temperature performance test chamber (100) is provided with a refrigeration inlet (101) and a refrigeration return air outlet (102) between the refrigeration device (200) and the low-temperature drop zone (300) and between the airtightness test zone (500) and the test buffer zone (600). Temperature sensors and fences are provided on the refrigeration inlet (101) and the refrigeration return air outlet (102).

3. The electro-hydraulic remote control valve cryogenic performance test device according to claim 1, characterized in that, The low-temperature performance test box (100) is provided with an observation window made of transparent electric heating film hollow tempered glass.

4. The electro-hydraulic remote control valve cryogenic performance test apparatus according to claim 1, characterized by, The low-temperature performance test box (100) is provided with an observation window made of transparent electric heating film hollow tempered glass.

5. The electro-hydraulic remote control valve cryogenic performance test apparatus according to claim 1, wherein The icing test device (401) is provided with a spraying device, which comprises a spray head, a spraying rack, an air pipe and a water pipe.

6. The electro-hydraulic remote control valve cryogenic performance test apparatus according to claim 1, characterized by, The icing test device (401) is provided with a water accumulation tray, and a plurality of holes are arranged on the water accumulation tray.

7. The electro-hydraulic remote control valve cryogenic performance test apparatus according to claim 1, wherein The air tightness test device (501) comprises a fixed rack (502), a fixed claw (503) and a telescopic column (504), the telescopic column (504) is provided with a plurality of telescopic columns, and the telescopic column (504) is arranged on the fixed rack (502), the fixed claw (503) is arranged on the upper end of the telescopic column (504), and the fixed claw (503) is used for clamping the test equipment (700), and the fixed rack (502) is provided with a water filling area (505).

8. The test method of claim 1, wherein, The method comprises the following steps: s100, selecting an electro-hydraulic remote control valve sample as the test equipment (700), and performing appearance inspection and material inspection, which meets the technical requirements, and the technical data and proof documents are consistent; s110, checking the insulation resistance between the power supply phase and the ground of the test equipment (700), and performing function inspection; s120, performing low-temperature sudden drop test, placing the test equipment (700) in the low-temperature sudden drop area (300), and the test equipment (700) is not powered on, setting the environmental temperature, waiting for the temperature of the test equipment (700) to drop to the test temperature, powering on to perform function inspection of the test equipment (700), the switch function of the test equipment (700) is normal, and the feedback signal is correct; s130, performing low-temperature test, waiting for the surface temperature of the test equipment (700) to reach the test temperature, keeping for a certain period of time, powering on to perform function inspection of the test equipment (700), the switch function of the test equipment (700) is normal, and the feedback signal is correct; s140, performing external icing test, placing the test equipment (700) in the external icing device (402), waiting for the temperature of the test equipment (700) to reach the test temperature, icing the test equipment (700), keeping for a certain period of time after breaking the ice, powering on to perform function inspection of the test equipment (700), the switch function of the test equipment (700) is normal, and the feedback signal is correct; s150, internal icing test is carried out, the test equipment (700) is placed in the internal icing device (403), the temperature of the test equipment (700) reaches the test temperature, the test equipment (700) is iced, the ice thickness reaches the requirement, a certain time is kept, the ice is broken, the function is checked after power on, the switch function is normal, the feedback signal is correct; s160, the air tightness test is carried out, the test equipment (700) is placed on the fixed rack (502) in the air tightness test area (500), the valve of the test equipment (700) is adjusted to the closed position, the inlet pipe end of the test equipment (700) is filled with water, the pressure is applied from the inlet end to carry out the sealing test, the test pressure and the test time requirements are met.

9. The test method of claim 8, wherein, In steps s100 to s160, if the current working performance of the test equipment (700) cannot meet the requirements of the actual working performance requirements, it is determined that the performance of the test equipment (700) is not up to standard, and the subsequent test steps are stopped.

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