A high temperature ball valve test device and test method

Abstract

The present application discloses a high-temperature ball valve testing device and a testing method, which relate to the field of ball valve testing, and include a gas cylinder group, a booster pump, a right-end quick-release joint, a right-end needle valve, a right-end pressure gauge, a right-end test blind plate, a heating component, a left-end test blind plate, a left-end needle valve, a left-end quick-release joint, a sealing leak detection component, a left-end pressure gauge, a thermocouple on the outer wall of an auxiliary valve body, a thermocouple on the outer wall of a stuffing box, a thermocouple on the outer wall of a main valve body and a thermocouple in a valve cavity. The high-temperature ball valve is provided with a main-and-auxiliary valve body connecting leak detection port and a stuffing box leak detection port. Through the present invention, the high-temperature ball valve can be subjected to a high-temperature opening and closing action cycle test, a high-temperature gas sealing test, a high-temperature fugitive test and a high-temperature torque test at high temperature, so as to ensure the safe and reliable operation of the high-temperature ball valve at high temperature.

Description

Technical Field

[0001] The present application relates to the field of ball valve testing, and in particular to a high-temperature ball valve testing device and testing method. Background Art

[0002] A ball valve is a valve that uses a ball as a closing member. The ball can be driven by a handle or other driving device to rotate 90 degrees, so that the ball hole coincides with or is perpendicular to the center line of the valve body channel to achieve full opening or full closing. Compared with other valves, ball valves have many outstanding advantages such as small fluid resistance, quick and convenient opening and closing, good sealing, long life, high reliability, etc., and have been widely used in aerospace, petrochemical, long-distance pipelines, light industry and food, construction and many other fields.

[0003] With the rapid development of modern industry, the number of pipelines carrying high-temperature fluids is increasing, and the application areas of high-temperature ball valves are becoming more and more extensive. For example, the design temperature of the high-temperature ball valve in the roasting kiln of the laterite nickel ore smelting process is as high as 950℃, the design temperature of the high-temperature ball valve on the cross-tube of the ethylene cracking furnace is as high as 750℃, and the design temperature of the wear-resistant high-temperature ball valve on the catalyst delivery pipeline of the propane dehydrogenation unit is 670℃. High-temperature ball valves often use metal sealing structures, and the ball and valve seat sealing surfaces are sprayed or sprayed with high-temperature hard alloy to improve wear resistance and erosion resistance.

[0004] When a high-temperature ball valve is operated under high-temperature conditions, the following problems are likely to occur: (1) The high-temperature ball valve cannot be operated due to high-temperature jamming caused by thermal expansion of the material; (2) The sealing surface of the high-temperature ball valve is damaged during the high-temperature opening and closing cycle test, such as the sealing surface coating falling off, and the valve leaks internally; (3) The preload spring of the valve seat relaxes stress at high temperatures, and the valve leaks internally; (4) The preload force of the locking bolts at the connection between the main valve body and the auxiliary valve body, and the connection between the main valve body and the stuffing box is reduced or the sealing gasket is damaged, and the valve leaks externally; (5) The sealing performance of the packing decreases at high temperatures, and the valve leaks externally. Once the above problems occur in a high-temperature ball valve, it may cause irreversible harm or injury.

[0005] At present, the ball valve standards at home and abroad stipulate that the factory performance test items are only shell test and seal test at room temperature. Therefore, it is very necessary to carry out high-temperature opening and closing action cycle test, high-temperature gas seal test, high-temperature fugitive test and high-temperature torque test of high-temperature ball valves. At present, there are no devices and test methods for the above tests at home and abroad. Summary of the invention

[0006] In order to realize high-temperature opening and closing action cycle test, high-temperature air sealing test, high-temperature escape test and high-temperature torque test of high-temperature ball valves, the present application provides a high-temperature ball valve test device and test method.

[0007] The high temperature ball valve test device and test method provided in this application adopt the following technical solutions:

[0008] A high-temperature ball valve test device, comprising a gas cylinder assembly, a booster pump, a right-end quick-release joint, a right-end needle valve, a right-end pressure gauge, a right-end test blind plate, a heating assembly, a left-end test blind plate, a left-end needle valve, a left-end quick-release joint, a sealing leak detection assembly, a left-end pressure gauge, an auxiliary valve body outer wall thermocouple, a stuffing box outer wall thermocouple, a main valve body outer wall thermocouple and a valve inner cavity thermocouple, and the high-temperature ball valve is provided with a main and auxiliary valve body connection leak detection port and a stuffing box leak detection port;

[0009] The gas cylinder group is connected together by multiple gas cylinders to provide the gas required during the test;

[0010] The booster pump is used to increase the pressure of the gas cylinder group to the pressure required for the test, and is connected to the output end of the gas cylinder group. The output end of the booster pump is sequentially connected to the right-end quick-release connector, the right-end needle valve, and the right-end test blind plate;

[0011] The right-end quick-release connector is used for quick switching between the booster pump and the sealing leak detection assembly;

[0012] The needle valve at the right end is used to connect or cut off the test medium;

[0013] The right-end pressure gauge is used to display the pressure at the right end during the test and is installed at the input end of the high-temperature ball valve;

[0014] The right end test blind plate is connected to the main valve body through studs and nuts, and a sealing gasket is provided at the connection;

[0015] The heating assembly is composed of an electric heater, a heating belt and a thermal insulation layer. The electric heater is connected to the heating belt. The heating belt is wrapped around the outer surface of the high-temperature ball valve and covered with a thermal insulation layer for thermal insulation.

[0016] The left end test blind plate is connected to the auxiliary valve body through studs and nuts, and a sealing gasket is provided at the connection;

[0017] The left end needle valve is used to connect or cut off the test medium;

[0018] The left-end quick-release connector is used for quick switching between the booster pump and the sealing leak detection assembly;

[0019] The sealing leak detection assembly is composed of a bubble counter and a flow meter, and is used to detect leakage during a high-temperature gas sealing test. The input end of the bubble counter is sequentially connected to the left-end quick-release connector, the left-end needle valve, and the left-end test blind plate;

[0020] The left end pressure gauge is used to display the pressure at the left end during the test and is installed at the output end of the high temperature ball valve;

[0021] The main and auxiliary valve body connection leak detection port is used to detect the leakage of the main and auxiliary valve body connection during the high temperature fugitive test;

[0022] The auxiliary valve body outer wall thermocouple is arranged on the auxiliary valve body outer wall, and is used to detect the temperature of the auxiliary valve body outer wall when the high-temperature ball valve is heated and kept warm;

[0023] The stuffing box outer wall thermocouple is arranged on the outer wall of the lowest layer of stuffing in the stuffing box, and is used to detect the temperature of the outer wall of the lowest layer of stuffing in the stuffing box when the high-temperature ball valve is heated and insulated;

[0024] The main valve body outer wall thermocouple is arranged on the main valve body outer wall, and is used to detect the temperature of the main valve body outer wall when the high-temperature ball valve is heated and kept warm;

[0025] The valve cavity thermocouple is arranged in the valve cavity and is used to detect the temperature of the valve cavity when the high-temperature ball valve is heated and kept warm;

[0026] The stuffing box leak detection port is used to detect the leakage amount at the connection between the stuffing box and the main valve body during the high-temperature fugitive test.

[0027] Preferably, the bubble counter includes a body, on which an air inlet pipe and an air outlet pipe are provided, the air inlet pipe is connected to the left-end quick-release connector, the air outlet pipe is connected to the flow meter, a buffer box is also provided on the body, one end of the air inlet pipe away from the left-end quick-release connector is connected to the buffer box, a first connecting pipe is installed on the inner wall of the body, the first connecting pipe is connected to the internal space of the buffer box, and a pressure relief valve is also installed on the top of the body.

[0028] By adopting the above technical solution, when conducting an air-tight test, if there is a leakage in the ball valve, the leaked gas will enter the buffer box from the air inlet pipe, and then enter the water in the device body from the first connecting pipe, and generate bubbles. Then the gas will pass into the flow meter from the air outlet pipe, thus realizing the air-tight test of the ball valve. If the leakage is serious, the pressure can be released immediately through the pressure relief valve to prevent damage to the bubble counter.

[0029] Preferably, a first pressure relief plate and a second pressure relief plate are rotatably provided on the device body by a torsion spring, and the first pressure relief plate and the second pressure relief plate are both located in a buffer box. A second connecting pipe is also installed in the device body, and the end of the second connecting pipe extends below the liquid surface. An escape area is provided on the outer wall of the device body located in the buffer box, and the second connecting pipe is connected to the escape area. The first pressure relief plate is used to block the escape area. A pressure relief port is provided on the side wall of the device body, and the pressure relief port connects the buffer box and the interior of the device body, and the second pressure relief plate is used to block the pressure relief port.

[0030] By adopting the above technical solution, if the ball valve leaks, there are the following three situations: when the leakage is small, the gas will enter the underwater body from the first connecting pipe and finally pass through the flow meter; when the leakage is large, the air pressure will also increase. When the air pressure is sufficient to overcome the action of the torsion spring, the first pressure relief plate will be driven to rotate a certain angle. At this time, the gas can enter the underwater from the second connecting pipe and finally pass through the flow meter; when the leakage is too large, the first connecting pipe and the second connecting pipe act at the same time and the gas cannot be discharged in time. In this case, the second pressure relief plate will rotate, and the gas can directly enter the body from the pressure relief port. When the pressure in the body is too high, it will be discharged from the pressure relief valve; in this way, damage to the bubble counter can be prevented when there is a problem with the ball valve.

[0031] Preferably, a rolling column is arranged on the side of the first pressure relief plate, and an arc-shaped guide groove is provided on the side wall of the device body located in the avoidance area, and the rolling column slides and cooperates with the arc-shaped guide groove, and an installation groove is also provided in the side wall of the device body located in the avoidance area, and the device body is lifted and lowered in the installation groove and a linkage plate is slidably provided, and the linkage plate is horizontally arranged, and a linkage groove is provided on the upper length direction of the linkage plate, and the rolling column slides and cooperates with the linkage groove, and a wedge block is provided on the upper vertical direction of the linkage plate, and a first wedge surface is formed on the upper end of the wedge block; a sliding groove is provided on the inner wall of the device body located at the pressure relief port, and a locking block is slidably cooperated with the device body in the sliding groove, and a return spring is installed on the inner wall of the device body located in the sliding groove, one end of the return spring is connected to the inner wall of the sliding groove, and the other end of the return spring is connected to the locking block, and the second relief The side of the pressure plate is provided with a locking groove, and the locking block is plugged and matched with the locking groove; the middle of the locking block is provided with a through groove, and the locking block is located on the inner wall of the through groove to form a second wedge-shaped surface; when the first pressure relief plate rotates, the first rolling column drives the linkage plate to rise, that is, drives the wedge block to rise, the upper end of the wedge block passes through the through groove, and the first wedge surface and the second wedge surface cooperate, so that the locking block slides into the sliding groove, and the locking block and the locking groove are disengaged; the inner wall of the device body located at the pressure relief port is also provided with a sliding groove, the sliding groove and the sliding groove are connected, and the device body is slidably connected with a positioning block in the sliding groove, and the second pressure relief plate is hinged with a connecting rod on one side close to the buffer box, the connecting rod is hinged with the positioning block, and the upper end of the wedge block is provided with a positioning groove; when the second pressure relief plate rotates, the positioning block is driven to slide by the connecting rod, and the positioning block is plugged into the positioning groove to lock the wedge block.

[0032] By adopting the above technical solution, in the initial state, the locking block and the locking groove are plugged, the first pressure relief plate can rotate, and the second pressure relief plate cannot rotate. When the leakage is large, the first pressure relief plate can rotate to relieve pressure. If the second pressure relief plate also rotates, it will affect the detection effect; when the leakage is too large, the air pressure first drives the first pressure relief plate to rotate. When the first pressure relief plate rotates, the rolling column drives the linkage plate to rise, and the wedge block passes through the penetration groove. Under the action of the first wedge surface and the second wedge surface, the locking block slides into the sliding groove and disengages from the locking groove, unlocking the second pressure relief plate. The second pressure relief plate rotates under the action of air pressure to achieve pressure relief; and in the process of rotation, the connecting rod drives The positioning block slides and plugs into the positioning groove of the wedge block to lock the wedge block. At this time, the linkage plate cannot descend, that is, the first pressure relief plate cannot rotate. If the first pressure relief plate rotates at this time, the wedge block and the locking block will be disengaged. Under the action of the reset spring, the locking block extends out of the sliding groove, which will cause the second pressure relief plate to be unable to reset; when the leakage is large, the air supply to the ball valve will be stopped. After the pressure is released, the second pressure relief plate will be reset first under the action of the torsion spring, and drive the positioning block and the wedge block to disengage. Then the first pressure relief plate is reset, the wedge block and the locking block are disengaged, and the locking block is reset under the action of the reset spring and plugged into the locking groove, and the second pressure relief plate is locked again to restore the initial state.

[0033] A high temperature ball valve test method, using the above test device, to perform a high temperature opening and closing action cycle test, a high temperature air sealing test, a high temperature fugitive emission test and a high temperature torque test on the high temperature ball valve, characterized in that the steps are as follows:

[0034] 1) Under ambient temperature, perform normal temperature performance tests on high temperature ball valves in accordance with the requirements of ball valve test standards, including normal temperature shell test, normal temperature high pressure seal test, normal temperature low pressure seal test, normal temperature fugitive test, normal temperature action test and normal temperature torque test;

[0035] 2) After all items of normal temperature performance tests are qualified, the test equipment is installed and the gas cylinder group is filled with high-pressure nitrogen;

[0036] 3) Turn on the heating component and set the operating temperature. During the heating process, the temperature changes need to be observed through the thermocouple on the outer wall of the stuffing box, the thermocouple on the outer wall of the main valve body, and the thermocouple in the valve cavity;

[0037] 4) When the thermocouple in the valve cavity shows the operating temperature and is constant, perform the action test and torque test at the operating temperature as required;

[0038] 5) After the high temperature action test and torque test at the operating temperature are completed, continue heating through the heating component and set the design temperature. During the heating process, the temperature changes need to be observed through the thermocouple on the outer wall of the stuffing box, the thermocouple on the outer wall of the main valve body, and the thermocouple in the valve cavity;

[0039] 6) When the valve cavity thermocouple displays the design temperature and is constant, the action test and torque test at the design temperature shall be carried out as required. The action test and torque test methods at the design temperature are the same as those at the operating temperature;

[0040] 7) After the high-temperature action test and torque test at the design temperature are completed, cut off the heating component to allow the high-temperature ball valve to slowly cool to the operating temperature. During the cooling process, the temperature changes need to be observed through the thermocouple on the outer wall of the stuffing box, the thermocouple on the outer wall of the main valve body, and the thermocouple in the valve cavity;

[0041] 8) When the thermocouple in the valve cavity shows the operating temperature and is constant, the action test and torque test at the operating temperature shall be carried out as required. After the action test and torque test at the operating temperature are completed, the first high-temperature opening and closing action cycle test shall be carried out;

[0042] 9) Repeat the above steps 3) to 8) to complete the second high temperature opening and closing action cycle test and the third high temperature opening and closing action cycle test;

[0043] 10) After the high-temperature opening and closing action cycle test is completed, turn on the heating component and set the design temperature. During the heating process, the temperature changes need to be observed through the thermocouple on the outer wall of the stuffing box, the thermocouple on the outer wall of the main valve body, and the thermocouple in the valve cavity;

[0044] 11) When the thermocouple in the valve cavity shows the design temperature and is constant, high-temperature gas sealing test and high-temperature dissipation test at the design temperature shall be carried out as required;

[0045] 12) After the high-temperature gas sealing test and high-temperature dissipation test are completed, the heating component is cut off to allow the high-temperature ball valve to slowly cool to ambient temperature. During the cooling process, the temperature changes need to be observed through the thermocouple on the outer wall of the stuffing box, the thermocouple on the outer wall of the main valve body, and the thermocouple in the valve cavity;

[0046] 13) After the high-temperature ball valve is cooled to ambient temperature, the high-temperature ball valve is subjected to normal temperature performance test again according to the requirements of the ball valve test standard, including normal temperature shell test, normal temperature high pressure seal test, normal temperature low pressure seal test, normal temperature fugitive test, normal temperature action test and normal temperature torque test;

[0047] 14) After all tests are completed, a test report will be issued.

[0048] Preferably, the action test at operating temperature is divided into a pressure test and a non-pressure test:

[0049] The steps of pressure test are as follows:

[0050] 1) Open the needle valve on the right and close the needle valve on the left;

[0051] 2) The high temperature ball valve is in the closed state through the operating mechanism, and the closing torque is measured by a torque wrench or torque device;

[0052] 3) Turn on the gas cylinder group and booster pump, and gradually increase the pressure to the specified test pressure;

[0053] 4) Open the high-temperature ball valve through the operating mechanism and measure the opening torque through a torque wrench or torque device;

[0054] 5) Close the gas cylinder group and the booster pump, slowly open the left needle valve to release all the test media in the high-temperature ball valve cavity, the right test blind plate and the left test blind plate. Check whether the test media is completely released by the right and left pressure gauges;

[0055] 6) Close the needle valve on the left end;

[0056] The steps for the non-pressure test are as follows:

[0057] 1) The high temperature ball valve is in the closed state through the operating mechanism, and the closing torque is measured by a torque wrench or torque device;

[0058] 2) Open the high-temperature ball valve through the operating mechanism and measure the opening torque using a torque wrench or torque device.

[0059] Preferably, the steps of the high temperature airtightness test are as follows:

[0060] 1) Open the needle valve on the right and the needle valve on the left;

[0061] 2) The high temperature ball valve is in a closed state through the operating mechanism;

[0062] 3) Turn on the gas cylinder group and the booster pump, gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by relevant standards or users;

[0063] 4) When the ball and valve seat sealing surface leak, detect the leakage through the sealing leak detection assembly;

[0064] 5) After the high-temperature gas sealing test on the right side of the high-temperature ball valve is completed, close the gas cylinder group and the booster pump;

[0065] 6) Close the needle valve at the left end and remove the sealing leak detection assembly from the quick-release connector at the left end;

[0066] 7) Make the high-temperature ball valve half-open through the operating mechanism, slowly open the needle valve at the left end to release all the test media in the inner cavity of the high-temperature ball valve, the right end test blind plate and the left end test blind plate. Check whether the test media is completely released through the right end pressure gauge and the left end pressure gauge;

[0067] 8) Remove the booster pump from the right-end quick-release connector and connect it to the left-end needle valve, and connect the sealing leak detection assembly to the right-end quick-release connector;

[0068] 9) The high temperature ball valve is in the closed state through the operating mechanism;

[0069] 10) Turn on the gas cylinder group and booster pump, gradually pressurize from the left side to the specified test pressure and maintain the test pressure for the time required by relevant standards or users;

[0070] 11) When the ball and valve seat sealing surface leak, detect the leakage through the sealing leak detection assembly;

[0071] 12) After the high-temperature gas sealing test on the left side of the high-temperature ball valve is completed, turn off the gas cylinder group and the booster pump;

[0072] 13) Close the needle valve on the right end and remove the sealing leak detection assembly from the quick-release connector on the right end;

[0073] 14) Use the operating mechanism to put the high-temperature ball valve in a semi-open state, and slowly open the needle valve on the right end to release all the test media in the inner cavity of the high-temperature ball valve, the right-end test blind plate and the left-end test blind plate. The right-end pressure gauge and the left-end pressure gauge can be used to check whether the test medium is completely released.

[0074] Preferably, the steps of the high temperature fugitive emission test are as follows:

[0075] 1) Except for not installing the sealing leak detection assembly, the test device is installed and the gas cylinder group is filled with helium with a purity of not less than 97%;

[0076] 2) Open the needle valve on the right and close the needle valve on the left;

[0077] 3) The high-temperature ball valve is placed in a semi-open state through the operating mechanism;

[0078] 4) Turn on the gas cylinder group and the booster pump, gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by relevant standards or users;

[0079] 5) Use a helium leak detector to detect the leakage at the connection between the main valve body and the auxiliary valve body from the main and auxiliary valve body connection leak detection port, detect the leakage at the connection between the main valve body and the stuffing box from the stuffing box leak detection port, and detect the leakage at the packing from the upper end of the packing;

[0080] 6) After the high-temperature ball valve high-temperature emission test is completed, turn off the gas cylinder group and booster pump;

[0081] 7) Close the needle valve on the left end;

[0082] 8) Use the operating mechanism to put the high-temperature ball valve in a semi-open state, and slowly open the left-end needle-type discharger to release all the test media in the inner cavity of the high-temperature ball valve, the right-end test blind plate, and the left-end test blind plate. The right-end pressure gauge and the left-end pressure gauge can be used to check whether the test media is completely discharged.

[0083] In summary, the present application includes at least one of the following beneficial technical effects:

[0084] 1. The present invention provides a high-temperature ball valve test device and test method, which can perform high-temperature opening and closing action cycle test, high-temperature gas sealing test, high-temperature fugitive emission test and high-temperature torque test on the high-temperature ball valve at high temperature, so as to ensure the safe and reliable operation of the high-temperature ball valve at high temperature;

[0085] 2. With the help of the bubble counter in this application, different leakage situations can be dealt with. When the leakage is small, the test is carried out normally. When the leakage is large, a second connecting pipe is added to achieve pressure relief. When the leakage is too large, the pressure is quickly released through the pressure relief port to release the pressure from the device body to prevent damage to the bubble counter. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 This is a schematic diagram of the overall structure of the high-temperature ball valve test device in Example 1 of the present application;

[0087] Figure 2 This is a schematic diagram of a high temperature ball valve test in Example 2 of the present application;

[0088] Figure 3 This is a cross-sectional view of the overall structure of the bubble counter in Example 3 of the present application;

[0089] Figure 4 This is a schematic diagram of the structure of the first pressure relief plate in the third embodiment of the present application;

[0090] Figure 5 This is a schematic diagram of the cross-sectional structure of the bubble counter body in the third embodiment of the present application, which mainly reflects the structure of the linkage plate;

[0091] Figure 6 This is a partial structural cross-sectional view of the third embodiment of the present application, which mainly reflects the structure of the locking block;

[0092] Figure 7 This is a schematic diagram of the structure of the second pressure relief plate in the third embodiment of the present application;

[0093] Figure 8 This is a schematic diagram of the structure of the locking block and the wedge block in the third embodiment of the present application;

[0094] Fig. 9 for Figure 5 The partial enlarged view of A in the middle mainly shows the structure of the positioning block.

[0095] Figure numerals: 1, gas cylinder assembly; 2, booster pump; 3, right-end quick-release connector; 4, right-end needle valve; 5, right-end pressure gauge; 6, right-end test blind plate; 7, heating assembly; 8, high-temperature ball valve; 9, left-end test blind plate; 10, left-end needle valve; 11, left-end quick-release connector; 12, sealing leak detection assembly; 13, left-end pressure gauge; 14, main and auxiliary valve body connection leak detection port; 15, auxiliary valve body outer wall thermocouple; 16, stuffing box outer wall thermocouple; 17, main valve body outer wall thermocouple; 18, valve inner cavity thermocouple; 19, stuffing box leak detection port; 20, body; 21, buffer box; 22, air inlet pipe; 23, air outlet pipe; 2 4. first connecting pipe; 25. pressure relief valve; 26. first pressure relief plate; 27. second pressure relief plate; 28. second connecting pipe; 29. ​​avoidance zone; 30. pressure relief port; 31. rolling column; 32. arc guide groove; 33. mounting groove; 34. linkage plate; 35. linkage groove; 36. lifting groove; 37. wedge block; 38. first wedge surface; 39. vertical groove; 40. locking block; 401. locking part; 41. return spring; 42. locking groove; 43. penetration groove; 44. second wedge surface; 45. slide groove; 451. sliding block; 46. positioning block; 47. connecting rod; 48. positioning groove; 49. sliding groove. DETAILED DESCRIPTION

[0096] The following is combined with Figure 1-9 This application is described in further detail.

[0097] The embodiments of the present application disclose a high-temperature ball valve testing device and a testing method.

[0098] Example 1

[0099] Reference Figure 1 The high-temperature ball valve test device includes a gas cylinder group 1, a booster pump 2, a right-end quick-release connector 3, a right-end needle valve 4, a right-end pressure gauge 5, a right-end test blind plate 6, a heating component 7, a left-end test blind plate 9, a left-end needle valve 10, a left-end quick-release connector 11, a sealing leak detection component 12, a left-end pressure gauge 13, an auxiliary valve body outer wall thermocouple 15, a stuffing box outer wall thermocouple 16, a main valve body outer wall thermocouple 17 and a valve inner cavity thermocouple 18. The high-temperature ball valve 8 is provided with a main and auxiliary valve body connection leak detection port 14 and a stuffing box leak detection port 19.

[0100] Gas cylinder group 1: multiple gas cylinders are connected together to provide the gas required during the test. In this embodiment, high-pressure nitrogen is contained in the gas cylinder group 1 during the high-temperature opening and closing action cycle test, high-temperature gas sealing test and high-temperature torque test, and high-pressure helium is contained in the gas cylinder group 1 during the high-temperature fugitive test.

[0101] Booster pump 2: used to increase the pressure of the gas cylinder group 1 to the pressure required for the test, and connected to the output end of the gas cylinder group 1. The output end of the booster pump 2 is connected to the right-end quick-release connector 3, the right-end needle valve 4, and the right-end test blind plate 6 in sequence.

[0102] The right-end quick-release connector 3 is used for quick switching between the booster pump 2 and the sealing leak detection assembly 12 .

[0103] Needle valve 4 at the right end: used to connect or cut off the test medium.

[0104] Right end pressure gauge 5: used to display the pressure at the right end during the test, installed at the input end of the high temperature ball valve.

[0105] Right end test blind plate 6: connected to the main valve body through studs and nuts, and a sealing gasket is arranged at the connection; the right end test blind plate 6 is provided with a right end pressure gauge 5, and the valve inner cavity thermocouple 18 passes through the right end test blind plate 6.

[0106] Heating assembly 7: It is composed of an electric heater, a heating belt and a thermal insulation layer. The electric heater is connected to the heating belt. The maximum heating temperature of the electric heater can reach 1000°C. The heating temperature is set according to the test requirements. The heating belt is wrapped around the outer surface of the high-temperature ball valve and covered with a thermal insulation layer for heat preservation.

[0107] The left end test blind plate 9 is connected to the auxiliary valve body through studs and nuts, and a sealing gasket is arranged at the connection; the left end test blind plate 9 is provided with a left end pressure gauge 13.

[0108] Left end needle valve 10: used to connect or cut off the test medium.

[0109] The left end quick-release connector 11 is used for quick switching between the booster pump 2 and the sealing leak detection assembly 12 .

[0110] Sealing leak detection assembly 12: It consists of a bubble counter and a flow meter, and is used to detect leakage during high-temperature gas sealing tests. The input end of the bubble counter is connected to the left-end quick-release connector 11, the left-end needle valve 10, and the left-end test blind plate 9 in sequence.

[0111] Left end pressure gauge 13: used to display the pressure at the left end during the test, installed at the output end of the high temperature ball valve.

[0112] Main and auxiliary valve body connection leak detection port 14: used for detecting the leakage of the main and auxiliary valve body connection during high temperature fugitive test.

[0113] Auxiliary valve body outer wall thermocouple 15: arranged on the auxiliary valve body outer wall, used for detecting the temperature of the auxiliary valve body outer wall when the high-temperature ball valve 8 is heated and kept warm.

[0114] Stuffing box outer wall thermocouple 16: arranged on the outer wall of the lowest layer of stuffing in the stuffing box, used for detecting the temperature of the outer wall of the lowest layer of stuffing in the stuffing box when the high-temperature ball valve 8 is heated and kept warm.

[0115] Thermocouple 17 on the outer wall of the main valve body: It is arranged on the outer wall of the main valve body and is used to detect the temperature of the outer wall of the main valve body when the high-temperature ball valve 8 is heated and kept warm.

[0116] Valve cavity thermocouple 18: arranged in the valve cavity, used for detecting the valve cavity temperature when the high-temperature ball valve 8 is heated and kept warm.

[0117] Stuffing box leak detection port 19: used to detect leakage at the connection between the stuffing box and the main valve body during high temperature emission test.

[0118] Example 2

[0119] Reference Figure 2 The high temperature ball valve test method uses the above-mentioned high temperature ball valve test device to simultaneously perform a high temperature opening and closing action cycle test, a high temperature air sealing test, a high temperature fugitive emission test and a high temperature torque test on the high temperature ball valve 8. The test method includes the following steps:

[0120] 1) At ambient temperature, perform normal temperature performance tests on the high temperature ball valve 8 in accordance with the requirements of the ball valve test standard, including normal temperature shell test, normal temperature high pressure seal test, normal temperature low pressure seal test, normal temperature fugitive emission test, normal temperature action test and normal temperature torque test.

[0121] 2) After all items of normal temperature performance tests are qualified, Figure 1 The test device is installed as required and gas cylinder group 1 is filled with high-pressure nitrogen.

[0122] 3) Turn on the heating component 7 and set the operating temperature. During the heating process, the temperature changes need to be observed through the thermocouple 16 on the outer wall of the stuffing box, the thermocouple 17 on the outer wall of the main valve body, and the thermocouple 18 in the valve cavity.

[0123] 4) When the valve cavity thermocouple 18 displays the operating temperature and is constant, the action test and torque test at the operating temperature shall be carried out as required. Before the test, the number of actions, the pressure-carrying or non-pressure-carrying action test, and the number of torque measurements shall be clearly defined.

[0124] The method of pressure action test is:

[0125] (1) Open the needle valve 4 at the right end and close the needle valve 10 at the left end.

[0126] (2) The high-temperature ball valve 8 is placed in a closed state through the operating mechanism, and the closing torque is measured using a torque wrench or torque device.

[0127] (3) Turn on gas cylinder group 1 and booster pump 2, and gradually increase the pressure to the specified test pressure.

[0128] (4) Open the high-temperature ball valve 8 through the operating mechanism, and measure the opening torque using a torque wrench or torque device.

[0129] (5) Close the gas cylinder group 1 and the booster pump 2, and slowly open the left end needle valve 10 to release all the test media in the inner cavity of the high-temperature ball valve 8, the right end test blind plate 6 and the left end test blind plate 9. The right end pressure gauge 5 and the left end pressure gauge 13 can be used to check whether the test media has been completely released.

[0130] (6) Close the left needle valve 10.

[0131] The method of non-pressurized action test is:

[0132] (1) The high-temperature ball valve 8 is placed in a closed state through the operating mechanism, and the closing torque is measured by a torque wrench or a torque device.

[0133] (2) Open the high-temperature ball valve 8 through the operating mechanism, and measure the opening torque using a torque wrench or torque device.

[0134] The torque measurement is performed for the first and last time of the action, and can also be performed every time as required.

[0135] 5) After the high temperature action test and torque test at the operating temperature are completed, continue heating through the heating component 7 and set the design temperature. During the heating process, it is necessary to observe the temperature changes through the thermocouple 16 on the outer wall of the stuffing box, the thermocouple 17 on the outer wall of the main valve body, and the thermocouple 18 in the valve cavity.

[0136] 6) When the valve cavity thermocouple 18 displays the design temperature and is constant, the action test and torque test at the design temperature are carried out as required. The action test and torque test methods at the design temperature are the same as those at the operating temperature.

[0137] 7) After the high-temperature action test and torque test at the design temperature are completed, the heating component 7 is cut off to allow the high-temperature ball valve 8 to slowly cool to the operating temperature. During the cooling process, the temperature changes need to be observed through the thermocouple 16 on the outer wall of the stuffing box, the thermocouple 17 on the outer wall of the main valve body, and the thermocouple 18 in the valve cavity.

[0138] 8) When the valve inner cavity thermocouple 18 displays the operating temperature and is constant, the action test and torque test at the operating temperature are carried out as required. After the action test and torque test at the operating temperature are completed, the first high-temperature opening and closing action cycle test is carried out.

[0139] 9) Repeat the above steps 3) to 8) to complete the second high-temperature opening and closing action cycle test and the third high-temperature opening and closing action cycle test.

[0140] 10) After the high-temperature opening and closing action cycle test is completed, the heating component 7 is turned on and the design temperature is set. During the heating process, the temperature changes need to be observed through the thermocouple 16 on the outer wall of the stuffing box, the thermocouple 17 on the outer wall of the main valve body, and the thermocouple 18 in the valve cavity.

[0141] 11) When the valve cavity thermocouple 18 displays the design temperature and remains constant, a high-temperature gas sealing test and a high-temperature dissipation test shall be carried out at the design temperature as required.

[0142] The test method and test steps for high temperature airtightness test are as follows:

[0143] (1) Open the right needle valve 4 and the left needle valve 10.

[0144] (2) The high-temperature ball valve 8 is placed in a closed state through the operating mechanism.

[0145] (3) Turn on the gas cylinder group 1 and the booster pump 2, gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user.

[0146] (4) When the ball and valve seat sealing surface leak, the leakage amount is detected by the sealing leak detection component 12.

[0147] (5) After the high-temperature gas sealing test on the right side of the high-temperature ball valve 8 is completed, close the gas cylinder group 1 and the booster pump 2.

[0148] (6) Close the left needle valve 10 and remove the sealing leak detection assembly 12 from the left quick-release connector 11.

[0149] (7) The high-temperature ball valve 8 is placed in a semi-open state through the operating mechanism, and the left-end needle valve 10 is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve 8, the right-end test blind plate 6 and the left-end test blind plate 9. The right-end pressure gauge 5 and the left-end pressure gauge 13 can be used to check whether the test media is completely discharged.

[0150] (8) Remove the booster pump 2 from the right-end quick-release connector 3 and connect it to the left-end needle valve 10. Connect the sealing leak detection assembly 12 to the right-end quick-release connector 3.

[0151] (9) The high-temperature ball valve 8 is placed in a closed state through the operating mechanism.

[0152] (10) Turn on the gas cylinder group 1 and the booster pump 2, gradually pressurize from the left side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user.

[0153] (11) When the ball and valve seat sealing surface leak, the leakage amount is detected by the sealing leak detection component 12.

[0154] (12) After the high-temperature gas sealing test on the left side of the high-temperature ball valve 8 is completed, close the gas cylinder group 1 and the booster pump 2.

[0155] (13) Close the needle valve 4 at the right end and remove the sealing leak detection assembly 12 from the quick-release connector 3 at the right end.

[0156] (14) The high-temperature ball valve 8 is placed in a semi-open state through the operating mechanism, and the needle valve 4 at the right end is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve 8, the right end test blind plate 6 and the left end test blind plate 9. The right end pressure gauge 5 and the left end pressure gauge 13 can be used to check whether the test media is completely discharged.

[0157] The test method and test steps for high temperature dissipation test are as follows:

[0158] (1) Except for not installing the sealing leak detection assembly 12, Figure 1 The test device is installed according to the requirements, and the gas cylinder group 1 is filled with helium with a purity of not less than 97%.

[0159] (2) Open the needle valve 4 at the right end and close the needle valve 10 at the left end.

[0160] (3) The high-temperature ball valve 8 is placed in a semi-open state through the operating mechanism.

[0161] (4) Turn on the gas cylinder group 1 and the booster pump 2, gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user.

[0162] (5) Use a helium leak detector to detect the leakage at the connection between the main valve body and the auxiliary valve body from the main and auxiliary valve body connection leak detection port 14, detect the leakage at the connection between the main valve body and the stuffing box from the stuffing box leak detection port 19, and detect the leakage at the packing from the upper end of the packing.

[0163] (6) After the high-temperature fugitive emission test of the high-temperature ball valve 8 is completed, close the gas cylinder group 1 and the booster pump 2.

[0164] (7) Close the left needle valve 10.

[0165] (8) The high-temperature ball valve 8 is placed in a semi-open state through the operating mechanism, and the left-end needle valve 10 is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve 8, the right-end test blind plate 6 and the left-end test blind plate 9. The right-end pressure gauge 5 and the left-end pressure gauge 13 can be used to check whether the test media is completely discharged.

[0166] 12) After the high-temperature gas sealing test and the high-temperature dissipation test are completed, the heating component 7 is cut off to allow the high-temperature ball valve 8 to slowly cool to the ambient temperature. During the cooling process, the temperature changes need to be observed through the thermocouple 16 on the outer wall of the stuffing box, the thermocouple 17 on the outer wall of the main valve body, and the thermocouple 18 in the valve cavity.

[0167] 13) After the high-temperature ball valve 8 is cooled to ambient temperature, the high-temperature ball valve 8 is subjected to a normal temperature performance test again in accordance with the requirements of the ball valve test standard, including a normal temperature shell test, a normal temperature high-pressure seal test, a normal temperature low-pressure seal test, a normal temperature fugitive test, a normal temperature action test and a normal temperature torque test.

[0168] 14) After all tests are completed, a test report will be issued.

[0169] Special attention should be paid to Figure 2 Only the operating temperature and design temperature are indicated. Single or multiple test temperatures can be set according to test requirements. Figure 2 Only three high-temperature opening and closing action cycle tests are shown in the figure. Single or multiple high-temperature opening and closing action cycle tests can be set according to the test requirements.

[0170] Example 3

[0171] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the bubble counter includes a body 20, a buffer box 21 is arranged on the outer wall of the body 20, an air inlet pipe 22 is installed on the side of the buffer box 21 away from the body 20, one end of the air inlet pipe 22 is connected to the internal space of the buffer box 21, and the other end of the air inlet pipe 22 is connected to the left-end quick-release connector 11, an air outlet pipe 23 is also installed on the upper side of the body 20, and the air outlet pipe 23 is connected to the flow meter, the body 20 is filled with water at a certain level, a first connecting pipe 24 is installed in the body 20, one end of the first connecting pipe 24 is connected to the internal space of the buffer box 21, and the other end of the first connecting pipe 24 extends below the liquid level, and a pressure relief valve 25 is also installed on the top of the body 20.

[0172] When the ball valve is subjected to an air-tightness test, if there is leakage in the ball valve, the gas will first enter the buffer box 21 from the air inlet pipe 22, and then enter the underwater of the device body 20 from the first connecting pipe 24 to generate bubbles. Finally, the device body 20 flows from the air outlet pipe 23 to the flow meter, and the leakage of the ball valve can be tested. If the leakage is serious, the pressure can be released in time through the pressure relief valve 25 to prevent damage to the bubble counter.

[0173] A first pressure relief plate 26 and a second pressure relief plate 27 are hinged on the outer wall of the body 20 through a torsion spring. The first pressure relief plate 26 and the second pressure relief plate 27 are both located in the buffer box 21. A second connecting pipe 28 is also installed in the body 20. The end of the second connecting pipe 28 extends below the liquid level. An escape area 29 is provided on the outer wall of the body 20 located in the buffer box 21. The other end of the second connecting pipe 28 is connected to the escape area 29. The first pressure relief plate 26 is used to block the escape area 29. A pressure relief port 30 is provided through the side wall of the body 20. The pressure relief port 30 connects the interior of the body 20 with the interior of the buffer box 21. The second pressure relief plate 27 is used to block the pressure relief port 30.

[0174] If there is a leakage in the ball valve, there are three situations: the leakage is small, and the gas passes through the first connecting pipe 24 to test the leakage normally; when the leakage is large, the air pressure in the buffer box 21 will also increase. When the air pressure is sufficient to overcome the action of the torsion spring, it will drive the first pressure relief plate 26 to rotate. At this time, the second connecting pipe 28 is connected to the buffer box 21, and the gas can be passed into the water from the second connecting pipe 28. That is, the first connecting pipe 24 and the second connecting pipe 28 are used together to test the leakage; when the leakage is too large, even if the first connecting pipe 24 and the second connecting pipe 28 work together, the pressure cannot be released in time. At this time, the second pressure relief plate 27 is opened, and the gas is directly discharged from the pressure relief port 30 and finally discharged from the pressure relief valve 25.

[0175] Reference Figure 3 , Figure 4 and Figure 5 A rolling column 31 is fixedly connected to the side of the first pressure relief plate 26, and the rolling column 31 can also be rotatably connected to the side of the first pressure relief plate 26. An arc guide groove 32 is opened on the side wall of the device body 20 located in the avoidance area 29. The rolling column 31 slides in the arc guide groove 32. When the first pressure relief plate 26 rotates, the rolling column 31 slides in the arc guide groove 32, which guides the rotation of the first pressure relief plate 26. A mounting groove 33 is further provided in the side wall of the device body 20 located in the avoidance area 29. A linkage plate 34 is provided in the device body 20 for lifting and sliding in the mounting groove 33. The linkage plate 34 is horizontally arranged. A linkage groove 35 is provided along the length direction of the linkage plate 34. A lifting groove 36 that slides with the linkage plate 34 is provided on the opposite side walls of the mounting groove 33. One end of the rolling column 31 passes through the arc-shaped guide groove 32 and is plugged into and slides with the linkage groove 35. When the first pressure relief plate 26 rotates, the rolling column 31 moves accordingly, and the rolling column 31 drives the linkage plate 34 to rise.

[0176] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7A wedge block 37 is fixedly connected to the upper side of the linkage plate 34 in the vertical direction, and a first wedge surface 38 is formed on the upper end of the wedge block 37. A vertical groove 39 connected to the mounting groove 33 is provided in the body 20, and the wedge block 37 slides in the vertical groove 39; a sliding groove 49 is provided on the inner wall of the body 20 located at the pressure relief port 30, and the sliding groove 49 is connected to the vertical groove 39. The body 20 is located in the sliding groove 49 and is slidably connected with a locking block 40, and a locking portion 401 is formed at one end of the locking block 40. The body 20 is located in the sliding groove 49 and is installed with a return spring 41. The length direction of the return spring 41 is consistent with the sliding direction of the locking block 40. One end of the return spring 41 is connected to the inner wall of the sliding groove 49, and the other end is connected to the locking block 40. A locking groove 42 is provided on the side of the second pressure relief plate 27. In the initial state, under the action of the return spring 41, the locking block 40 extends out of the sliding groove 49, and the locking portion 401 is plugged into the locking groove 42. At this time, the second pressure relief plate 27 cannot rotate.

[0177] Reference Figure 6 and Figure 8 , a through groove 43 is formed in the middle of the locking block 40, and a second wedge surface 44 is formed on the inner wall of the locking block 40 located at the through groove 43. When the first pressure relief plate 26 rotates, the linkage plate 34 drives the wedge block 37 to rise, and the wedge block 37 passes through the through groove 43. Under the action of the first wedge surface 38 and the second wedge surface 44, the locking block 40 slides and disengages from the locking groove 42, thereby releasing the lock on the second pressure relief plate 27. In practice, only when the air pressure is too high and the first pressure relief plate 26 rotates at a large angle, that is, when the rising stroke of the wedge block 37 is large, will the first wedge surface 38 cooperate with the second wedge surface 44 to unlock the second pressure relief plate 27.

[0178] Reference Figure 5 , Figure 7 and Fig. 9 A slide groove 45 is also provided on the inner wall of the device body 20 located at the pressure relief port 30, and the slide groove 45 is communicated with the sliding groove 49. The device body 20 is located in the slide groove 45 and is slidably connected with a sliding block 451, and a positioning block 46 is fixedly connected to the sliding block 451. A connecting rod 47 is hinged on the side of the second pressure relief plate 27 close to the buffer box 21, and the connecting rod 47 is hinged to the sliding block 451. A positioning groove 48 is provided on the upper end of the wedge block 37. When the second pressure relief plate 27 rotates, the connecting rod 47 drives the positioning block 46 to slide and plugs into the positioning groove 48 to lock the wedge block 37.

[0179] In the initial state, the locking block 40 and the locking groove 42 are plugged, the first pressure relief plate 26 can rotate, and the second pressure relief plate 27 cannot rotate. When the leakage is large, the test work can still be carried out at this time, and the first pressure relief plate 26 rotates a small angle, and the first connecting pipe 24 and the second connecting pipe 28 work together; when the leakage is too large, the test work can no longer be carried out at this time. In order to prevent the bubble counter from being damaged, the first pressure relief plate 26 rotates first, and the rotation angle is large, the wedge block 37 rises, and the first wedge surface 38 and the second wedge surface 44 cooperate to form a pressure relief plate 26. Under the action of air pressure, the locking block 40 slides, the second pressure relief plate 27 is unlocked, and the second pressure relief plate 27 also rotates under the action of air pressure to achieve rapid pressure relief, and when the second pressure relief plate 27 rotates, the connecting rod 47 drives the positioning block 46 to slide and plug into the positioning groove 48 to achieve locking of the wedge block 37. At this time, the first pressure relief plate 26 cannot be closed, because if the first pressure relief plate 26 rotates at this time, the wedge block 37 and the locking block 40 are separated, and under the action of the reset spring 41, the locking block 40 extends out of the sliding groove 49, which will cause the second pressure relief plate 27 to be unable to reset. After the pressure is released, the second pressure relief plate 27 will first rotate and reset, and at the same time drive the positioning block 46 to move and disengage from the positioning groove 48. At this time, the first pressure relief plate 26 rotates and resets, and the locking block 40 is plugged into the locking groove 42 again under the action of the reset spring 41 to achieve locking of the second pressure relief plate 27.

[0180] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high temperature ball valve test device, characterized in that: It comprises a gas cylinder assembly (1), a booster pump (2), a right-end quick-release joint (3), a right-end needle valve (4), a right-end pressure gauge (5), a right-end test blind plate (6), a heating assembly (7), a left-end test blind plate (9), a left-end needle valve (10), a left-end quick-release joint (11), a sealing leak detection assembly (12), a left-end pressure gauge (13), an auxiliary valve body outer wall thermocouple (15), a stuffing box outer wall thermocouple (16), a main valve body outer wall thermocouple (17) and a valve inner cavity thermocouple (18); the high-temperature ball valve (8) is provided with a main and auxiliary valve body connection leak detection port (14) and a stuffing box leak detection port (19); The gas cylinder group (1) is connected together by a plurality of gas cylinders to provide the gas required during the test process; The booster pump (2) is used to increase the pressure of the gas cylinder group (1) to the pressure required for the test, and is connected to the output end of the gas cylinder group (1). The output end of the booster pump (2) is sequentially connected to the right end quick-release connector (3), the right end needle valve (4), and the right end test blind plate (6); The right-end quick-release connector (3) is used for quick switching between the booster pump (2) and the sealing leak detection assembly (12); The right end needle valve (4) is used to connect or cut off the test medium; The right end pressure gauge (5) is used to display the pressure at the right end during the test and is installed at the input end of the high temperature ball valve (8); The right end test blind plate (6) is connected to the main valve body through studs and nuts, and a sealing gasket is provided at the connection; The heating assembly (7) is composed of an electric heater, a heating belt and a heat preservation layer, wherein the electric heater is connected to the heating belt; the heating belt is wrapped around the outer surface of the high-temperature ball valve and covered with a heat preservation layer for heat preservation; The left end test blind plate (9) is connected to the auxiliary valve body through studs and nuts, and a sealing gasket is provided at the connection; The left end needle valve (10) is used to connect or cut off the test medium; The left-end quick-release connector (11) is used for quick switching between the booster pump (2) and the sealing leak detection assembly (12); The sealing leak detection assembly (12) is composed of a bubble counter and a flow meter, and is used to detect leakage during a high-temperature gas sealing test. The input end of the bubble counter is sequentially connected to a left-end quick-release connector (11), a left-end needle valve (10), and a left-end test blind plate (9); The left end pressure gauge (13) is used to display the pressure at the left end during the test and is installed at the output end of the high temperature ball valve (8); The main and auxiliary valve body connection leak detection port (14) is used to detect the leakage amount of the main and auxiliary valve body connection during the high temperature fugitive test; The auxiliary valve body outer wall thermocouple (15) is arranged on the auxiliary valve body outer wall and is used to detect the temperature of the auxiliary valve body outer wall when the high-temperature ball valve (8) is heated and kept warm; The stuffing box outer wall thermocouple (16) is arranged on the outer wall of the lowest layer of stuffing in the stuffing box, and is used to detect the temperature of the outer wall of the lowest layer of stuffing in the stuffing box when the high-temperature ball valve (8) is heated and kept warm; The main valve body outer wall thermocouple (17) is arranged on the main valve body outer wall and is used to detect the temperature of the main valve body outer wall when the high-temperature ball valve (8) is heated and kept warm; The valve inner cavity thermocouple (18) is arranged in the valve inner cavity and is used to detect the valve inner cavity temperature when the high-temperature ball valve (8) is heated and kept warm; The stuffing box leak detection port (19) is used to detect the leakage at the connection between the stuffing box and the main valve body during the high temperature fugitive test; The bubble counter comprises a body (20), the body (20) is provided with an air inlet pipe (22) and an air outlet pipe (23), the air inlet pipe (22) is connected to a left-end quick-release joint (11), the air outlet pipe (23) is connected to a flow meter, a buffer box (21) is also provided on the body (20), one end of the air inlet pipe (22) away from the left-end quick-release joint (11) is connected to the buffer box (21), a first connecting pipe (24) is installed on the inner wall of the body (20), the first connecting pipe (24) is connected to the internal space of the buffer box (21), and a pressure relief valve (25) is also installed on the top of the body (20); A first pressure relief plate (26) and a second pressure relief plate (27) are rotatably arranged on the body (20) by a torsion spring. Both the first pressure relief plate (26) and the second pressure relief plate (27) are located in the buffer box (21). A second connecting pipe (28) is also installed in the body (20). The end of the second connecting pipe (28) extends below the liquid surface. An escape area (29) is provided on the outer wall of the body (20) located in the buffer box (21). The second connecting pipe (28) is connected to the escape area (29). The first pressure relief plate (26) is used to block the escape area (29). A pressure relief port (30) is provided on the side wall of the body (20). The pressure relief port (30) enables the buffer box (21) and the body (20) to be connected. The second pressure relief plate (27) is used to block the pressure relief port (30).

2. A high temperature ball valve testing device according to claim 1, characterized in that: A rolling column (31) is arranged on the side of the first pressure relief plate (26); an arc-shaped guide groove (32) is provided on the side wall of the device body (20) located in the avoidance area (29); the rolling column (31) and the arc-shaped guide groove (32) are slidably matched; a mounting groove (33) is also provided in the side wall of the device body (20) located in the avoidance area (29); a linkage plate (34) is provided in the mounting groove (33) for the device body (20) to be lifted and slidably moved; the linkage plate (34) is arranged horizontally; a linkage groove (35) is provided on the linkage plate (34) along the length direction; the rolling column (31) and the linkage groove (35) are slidably matched ... slidably matched; the linkage plate (34) is slidably matched; the linkage plate (34) is slidably matched; the linkage plate (34) is slidably matched; the linkage plate (34) is slidably matched; the linkage plate (34) is slidably matched; the linkage plate (34) is slidably matched; the linkage A wedge block (37) is arranged on the movable plate (34) in the vertical direction, and a first wedge surface (38) is formed on the upper end of the wedge block (37); a sliding groove (49) is provided on the inner wall of the device body (20) located at the pressure relief port (30), and a locking block (40) is slidably matched with the device body (20) located in the sliding groove (49); a return spring (41) is installed on the inner wall of the device body (20) located in the sliding groove (49), one end of the return spring (41) is connected to the inner wall of the sliding groove (49), and the other end of the return spring (41) is connected to the locking block (40); a locking groove is provided on the side of the second pressure relief plate (27) (42), the locking block (40) is plugged into the locking groove (42); a through groove (43) is provided in the middle of the locking block (40), and a second wedge surface (44) is formed on the inner wall of the locking block (40) located at the through groove (43); when the first pressure relief plate (26) rotates, the rolling column (31) drives the linkage plate (34) to rise, that is, drives the wedge block (37) to rise, and the upper end of the wedge block (37) passes through the through groove (43), and the first wedge surface (38) and the second wedge surface (44) cooperate, so that the locking block (40) slides into the sliding groove (49), and the locking block (40) and the locking groove (42) are separated; The device body (20) is provided with a slide groove (45) at the inner wall of the pressure relief port (30), the slide groove (45) and the sliding groove (49) are connected, the device body (20) is located in the slide groove (45) and is slidably connected with a positioning block (46), the second pressure relief plate (27) is hinged with a connecting rod (47) on one side close to the buffer box (21), the connecting rod (47) is hinged with the positioning block (46), and a positioning groove (48) is provided at the upper end of the wedge block (37); when the second pressure relief plate (27) rotates, the positioning block (46) is driven to slide by the connecting rod (47), the positioning block (46) is plugged into the positioning groove (48), and the wedge block (37) is locked.

3. A high-temperature ball valve test method, using the test device according to claim 1, to perform a high-temperature opening and closing action cycle test, a high-temperature air sealing test, a high-temperature fugitive emission test and a high-temperature torque test on the high-temperature ball valve, characterized in that: Here are the steps: 1) Under ambient temperature, perform a normal temperature performance test on the high temperature ball valve (8) in accordance with the requirements of the ball valve test standard, including a normal temperature shell test, a normal temperature high pressure seal test, a normal temperature low pressure seal test, a normal temperature fugitive emission test, a normal temperature action test and a normal temperature torque test; 2) After all items of normal temperature performance tests are qualified, the test equipment is installed and the gas cylinder group (1) is filled with high-pressure nitrogen; 3) Turn on the heating component (7) and set the operating temperature. During the heating process, the temperature changes need to be observed through the thermocouple (16) on the outer wall of the stuffing box, the thermocouple (17) on the outer wall of the main valve body, and the thermocouple (18) in the valve cavity; 4) When the valve cavity thermocouple (18) shows the operating temperature and is constant, perform the action test and torque test at the operating temperature as required; 5) After the high temperature action test and torque test at the operating temperature are completed, the heating component (7) is used to continue heating and set the design temperature. During the heating process, the temperature change needs to be observed through the thermocouple (16) on the outer wall of the stuffing box, the thermocouple (17) on the outer wall of the main valve body, and the thermocouple (18) in the valve cavity; 6) When the valve cavity thermocouple (18) displays the design temperature and is constant, the action test and torque test at the design temperature are carried out as required. The action test and torque test methods at the design temperature are the same as those at the operating temperature; 7) After the high-temperature action test and torque test at the design temperature are completed, the heating component (7) is cut off to allow the high-temperature ball valve (8) to slowly cool to the operating temperature. During the cooling process, the temperature changes need to be observed through the thermocouple (16) on the outer wall of the stuffing box, the thermocouple (17) on the outer wall of the main valve body, and the thermocouple (18) in the valve cavity; 8) When the valve inner cavity thermocouple (18) shows the operating temperature and is constant, the action test and torque test at the operating temperature are carried out as required. After the action test and torque test at the operating temperature are completed, the first high-temperature opening and closing action cycle test is carried out; 9) Repeat the above steps 3) to 8) to complete the second high temperature opening and closing action cycle test and the third high temperature opening and closing action cycle test; 10) After the high-temperature opening and closing action cycle test is completed, the heating component (7) is turned on and the design temperature is set. During the heating process, the temperature changes need to be observed through the thermocouple (16) on the outer wall of the stuffing box, the thermocouple (17) on the outer wall of the main valve body, and the thermocouple (18) in the valve cavity; 11) When the valve cavity thermocouple (18) displays the design temperature and remains constant, a high-temperature gas sealing test and a high-temperature dissipation test at the design temperature are carried out as required; 12) After the high-temperature gas sealing test and the high-temperature dissipation test are completed, the heating component (7) is cut off to allow the high-temperature ball valve (8) to slowly cool to ambient temperature. During the cooling process, the temperature changes need to be observed through the thermocouple (16) on the outer wall of the stuffing box, the thermocouple (17) on the outer wall of the main valve body, and the thermocouple (18) in the valve cavity; 13) The high temperature ball valve (8) is cooled to ambient temperature, and a normal temperature performance test is performed on the high temperature ball valve (8) again in accordance with the requirements of the ball valve test standard, including a normal temperature shell test, a normal temperature high pressure seal test, a normal temperature low pressure seal test, a normal temperature fugitive emission test, a normal temperature action test and a normal temperature torque test; 14) After all tests are completed, a test report will be issued.

4. According to a high temperature ball valve test method as claimed in claim 3, the action test at operating temperature is divided into a pressure test and a non-pressure test: The steps of pressure test are as follows: 1) Open the right needle valve (4) and close the left needle valve (10); 2) The high temperature ball valve (8) is placed in a closed state by means of an operating mechanism, and the closing torque is measured by means of a torque wrench or a torque device; 3) Turn on the gas cylinder assembly (1) and the booster pump (2), and gradually increase the pressure to the specified test pressure; 4) opening the high-temperature ball valve (8) through the operating mechanism, and measuring the opening torque through a torque wrench or a torque device; 5) Close the gas cylinder assembly (1) and the booster pump (2), slowly open the left needle valve (10) to release all the test media in the inner cavity of the high-temperature ball valve (8), the right test blind plate (6) and the left test blind plate (9). Check whether the test media has been completely released by the right pressure gauge (5) and the left pressure gauge (13); 6) Close the left needle valve (10); The steps for the non-pressure test are as follows: 1) The high temperature ball valve (8) is placed in a closed state by means of an operating mechanism, and the closing torque is measured by means of a torque wrench or a torque device; 2) Open the high-temperature ball valve (8) through the operating mechanism, and measure the opening torque using a torque wrench or a torque device.

5. A high temperature ball valve testing method according to claim 3, characterized in that: The steps of high temperature airtightness test are as follows: 1) Open the right needle valve (4) and the left needle valve (10); 2) The high temperature ball valve (8) is placed in a closed state through the operating mechanism; 3) Turn on the gas cylinder assembly (1) and the booster pump (2), gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user; 4) When the ball and the valve seat sealing surface leak, the leakage amount is detected by the sealing leak detection component (12); 5) After the high-temperature gas sealing test on the right side of the high-temperature ball valve (8) is completed, close the gas cylinder assembly (1) and the booster pump (2); 6) Close the needle valve (10) at the left end and remove the sealing leak detection assembly (12) from the quick-release connector (11) at the left end; 7) The high-temperature ball valve (8) is placed in a half-open state through the operating mechanism, and the left-end needle valve (10) is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve (8), the right-end test blind plate (6) and the left-end test blind plate (9). The right-end pressure gauge (5) and the left-end pressure gauge (13) can be used to check whether the test media has been completely discharged; 8) Remove the booster pump (2) from the right-end quick-release connector (3) and connect it to the left-end needle valve (10), and connect the sealing leak detection assembly (12) to the right-end quick-release connector (3); 9) The high temperature ball valve (8) is placed in a closed state through the operating mechanism; 10) Turn on the gas cylinder assembly (1) and the booster pump (2), gradually pressurize from the left side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user; 11) When the ball and the valve seat sealing surface leak, the leakage amount is detected by the sealing leak detection component (12); 12) After the high-temperature gas sealing test on the left side of the high-temperature ball valve (8) is completed, close the gas cylinder assembly (1) and the booster pump (2); 13) Close the needle valve (4) at the right end and remove the sealing leak detection assembly (12) from the quick-release connector (3) at the right end; 14) The high-temperature ball valve (8) is placed in a semi-open state through the operating mechanism, and the needle valve (4) at the right end is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve (8), the right end test blind plate (6) and the left end test blind plate (9). The right end pressure gauge (5) and the left end pressure gauge (13) can be used to check whether the test media has been completely discharged.

6. A high temperature ball valve testing method according to claim 3, characterized in that: The steps of high temperature fugitive emission test are as follows: 1) Except for not installing the sealing leak detection assembly (12), the test device is installed, and the gas cylinder group (1) is filled with helium with a purity of not less than 97%; 2) Open the right needle valve (4) and close the left needle valve (10); 3) The high temperature ball valve (8) is placed in a semi-open state through the operating mechanism; 4) Turn on the gas cylinder assembly (1) and the booster pump (2), gradually pressurize from the right side to the specified test pressure and maintain the test pressure for the time required by the relevant standards or the user; 5) Using a helium leak detector, detect the leakage at the connection between the main valve body and the auxiliary valve body from the main and auxiliary valve body connection leak detection port (14), detect the leakage at the connection between the main valve body and the stuffing box from the stuffing box leak detection port (19), and detect the leakage at the packing from the upper end of the packing; 6) After the high-temperature fugitive emission test of the high-temperature ball valve (8) is completed, close the gas cylinder assembly (1) and the booster pump (2); 7) Close the left needle valve (10); 8) The high-temperature ball valve (8) is placed in a semi-open state through the operating mechanism, and the left-end needle valve (10) is slowly opened to discharge all the test media in the inner cavity of the high-temperature ball valve (8), the right-end test blind plate (6) and the left-end test blind plate (9). The right-end pressure gauge (5) and the left-end pressure gauge (13) can be used to check whether the test media has been completely discharged.

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