Sealing performance testing device

Abstract

The utility model discloses a sealing performance testing device, which is used for measuring the sealing performance of a sealing section in a reactor core neutron flux measuring system and comprises a pressurizing and heating device, a connecting pipe, a stop valve, a first pressure gauge and a heat preservation assembly, the pressurizing and heating device is provided with a water injection port and a water outlet and is used for pressurizing and heating injected water; the connecting pipe is used for being connected between the water outlet of the pressurizing and heating device and the end of the sealing sleeve of the sealing section; the stop valve is arranged in the connecting pipe; the first pressure gauge is arranged in the connecting pipe and located between the stop valve and the end of the sealing sleeve. The heat preservation assembly is used for wrapping the sealing section and the finger sleeve pipe. According to the scheme, injected water is heated and pressurized through the pressurizing and heating device to form high-temperature and high-pressure water, then the connecting pipe is closed through the stop valve, the high-temperature and high-pressure water is subjected to pressure maintaining and heat preservation in the sealing section and the finger sleeve for a period of time, whether the water pressure in the sealing section is reduced or not is detected through the first pressure gauge, and therefore the sealing performance of the sealing section is tested.

Description

Technical Field

[0001] This utility model relates to the technical field of nuclear power plant testing tools, and in particular to a sealing test device. Background Technology

[0002] The main function of the reactor core neutron flux measurement system is to provide a neutron flux distribution map of the reactor core. It has 50 measurement channels for fuel assemblies, such as... Figure 1 As shown, the measurement channel consists of a guide tube, a manual valve, a sealing section, and a finger sleeve. The neutron detector moves inside the finger sleeve, thereby measuring the neutron flux point by point across the entire height of the reactor core.

[0003] like Figure 2 As shown, the sleeve is formed by sealing and welding of the end cap, pipe, flange, and sleeve. Its outer wall fits with the sealing section to isolate the primary loop water in the pressure vessel and guide pipe, forming a primary loop pressure boundary; its interior serves as the measurement channel for the neutron detector.

[0004] like Figure 3 As shown, the sealing section consists of a sealing sleeve, an upstream nut, an internal seal A, an external seal, a leak detector, a sleeve, a downstream nut, an internal seal B, and an end face seal. Internal seals A and B are in close contact with the outer wall of the finger sleeve, achieving dynamic sealing during the insertion and removal of the finger sleeve and static sealing after installation. The external seal is a redundant design of the upstream seal of the sealing section, and the end face seal is a redundant design of the downstream seal of the sealing section.

[0005] The primary coolant in the pressure vessel serves as the reactor core coolant, operating at a temperature of 350°C and a pressure of 17.24 MPa during operation. Upon reaching the sealing section, the temperature drops to 100±5°C, and the pressure remains at 17.24 MPa. If the sealing section fails, leakage of the high-temperature, high-pressure, and radioactive primary coolant will cause a serious accident. Therefore, testing the sealing performance of the sealing section is a crucial technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a sealing performance testing device that can test the sealing performance of a sealing section.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A sealing performance testing device is used to measure the sealing performance of a sealing section in a reactor core neutron flux measurement system, wherein a finger sleeve is fitted on the downstream nut side of the sealing section. The sealing performance testing device includes: a pressurizing and heating device, a connecting pipe, a shut-off valve, a first pressure gauge, and a thermal insulation component.

[0009] The pressurized heating device is equipped with a water inlet and a water outlet, and is used to pressurize and heat the injected water so that the water pressure and water temperature can reach the preset values.

[0010] The connecting pipe is used to connect the outlet of the pressurized heating device to the end of the sealing sleeve of the sealing section;

[0011] The shut-off valve is disposed in the connecting pipe;

[0012] The first pressure gauge is installed in the connecting pipe and is located between the end of the shut-off valve and the sealing sleeve;

[0013] The insulation component is used to cover the sealing section and the finger sleeve.

[0014] Preferably, the pressurized heating device includes: a shell, a high-pressure chamber, a pressurizing device, and a heating device;

[0015] The housing is provided with the water inlet;

[0016] The high-pressure chamber is located inside the housing, and its first water inlet is connected to the water injection port;

[0017] The pressurizing device is disposed inside the housing and is used to pressurize the water injected into the high-pressure chamber so that the water pressure reaches the preset water pressure.

[0018] The heating device is disposed inside the housing and is used to heat the water injected into the high-pressure chamber so that the water temperature reaches the preset water temperature.

[0019] The connecting pipe is used to connect the outlet of the high-pressure chamber to the end of the sealing sleeve.

[0020] Preferably, the pressurizing device includes: a gear pump, a one-way valve, a first pipe, and a second pipe;

[0021] The first pipe is connected between the water inlet and the first water inlet of the high-pressure chamber;

[0022] The second pipe is connected between the water inlet and the second inlet of the high-pressure chamber;

[0023] The gear pump is installed in the first pipeline;

[0024] The one-way valve is located in the second pipeline.

[0025] Preferably, the heating device includes an electric heating rod disposed within the high-pressure chamber.

[0026] Preferably, the pressurized heating device includes a thermometer, which is disposed inside the high-pressure chamber for detecting the water temperature inside the high-pressure chamber;

[0027] The pressurized heating device has a second pressure gauge, which is installed in the connecting pipe and is used to detect the water pressure at the outlet of the high-pressure chamber.

[0028] Preferably, the insulation component includes an insulation box and is assembled from insulation materials.

[0029] Preferably, the insulation component includes a flexible insulation layer and is used to wrap around the outside of the sealing section and the finger sleeve.

[0030] Preferably, one end of the connecting tube is threaded to the end of the sealing sleeve.

[0031] Preferably, the outer peripheral wall of the connecting pipe is wrapped with a heat insulation layer.

[0032] Preferably, it also includes a temperature sensor;

[0033] The temperature sensor is used to insert into a preset position of the finger sleeve and to detect the water temperature between the outer wall of the finger sleeve and the sealing section.

[0034] As can be seen from the above technical solution, in the sealing test device provided by this utility model, the injected water is heated and pressurized by a pressurizing and heating device to form high temperature and high pressure water. Then, the connecting pipe is shut off by a shut-off valve, so that the high temperature and high pressure water is kept under pressure and kept warm in the sealing section and the finger sleeve for a period of time. Then, the water pressure in the sealing section is detected by the first pressure gauge to see if it drops, thereby testing the sealing performance of the sealing section. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of a nuclear power plant measurement channel provided in an embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the finger sleeve provided in an embodiment of the present utility model;

[0038] Figure 3 A schematic diagram of the sealing section provided in an embodiment of this utility model;

[0039] Figure 4 A schematic diagram of the sealing test device provided in the embodiment of this utility model;

[0040] Figure 5 This is a schematic diagram of the heating and pressurizing device provided in the embodiment of the present utility model;

[0041] Figure 6 The test pressure curve of the sealing test device provided in the embodiment of this utility model.

[0042] In this diagram, 1 is a pressure vessel, 2 is a guide pipe, 3 is a manual valve, 4 is a sealing section, 41 is a sealing sleeve, 42 is an upstream nut, 43 is a sleeve, 44 is a downstream nut, 45 is an internal seal A, 46 is an external seal, 47 is a leak detector, 48 is an internal seal B, 49 is an end face seal, 5 is a finger sleeve, 51 is a head, 52 is a pipe, 53 is a flange, 54 is a sleeve, 6 is a pressurized heating device, 61 is a water inlet, 62 is a drain outlet, 63 is a thermometer, 64 is a second pressure gauge, 65 is a housing, 66 is a high-pressure chamber, 67 is a gear pump, 68 is a check valve, 69 is a heating rod, 610 is a drain valve, 7 is a connecting pipe, 8 is a shut-off valve, 9 is a first pressure gauge, 10 is an insulation box, and 11 is a temperature sensor. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] The sealing performance testing device provided in this embodiment of the invention is used to measure the sealing performance of the sealed section 4 in the reactor core neutron flux measurement system, wherein, as... Figure 4 As shown, a finger sleeve is fitted on the downstream nut side of the sealing section 4. The sealing test device includes: a pressure heating device, a connecting pipe 7, a shut-off valve 8, a first pressure gauge 9, and a heat insulation component.

[0045] The pressurized heating device is equipped with a water inlet 61 and a water outlet, and is used to pressurize and heat the injected water so that the water pressure and water temperature can reach the preset values.

[0046] The connecting pipe 7 is used to connect between the water outlet of the pressurized heating device and the end of the sealing sleeve 41 of the sealing section 4;

[0047] The shut-off valve 8 is installed in the connecting pipe 7;

[0048] The first pressure gauge 9 is installed in the connecting pipe 7 and is located between the end of the shut-off valve 8 and the sealing sleeve 41;

[0049] The insulation component is used to cover the sealing section 4 and the finger sleeve 5.

[0050] It should be noted that, considering the varying lengths of the 50 measurement channels, the lengths of the finger sleeves also differ, with even the shortest finger sleeve exceeding 7 meters in length, which is inconvenient for sealing tests. Therefore, a finger sleeve simulator can be manufactured to replace finger sleeve 5. This simulator only shortens the length of its tube while keeping other parts unchanged. After welding, its overall length is shortened, and the end of the simulator is then positioned beyond the internal sealing A position of sealing section 4. In other words, as... Figure 4 As shown, the finger sleeve simulator can be assembled on the downstream nut side of the sealing section 4 in the original manner; wherein, the finger sleeve simulator is inserted into the sealing section 4, and its left flange end face is sealed and fitted with the end face of the sealing section 4, and the upstream nut 42 and the downstream nut 44 of the sealing section 4 are tightened.

[0051] The pressurized heating device includes a pressurizing device, a heating device, and a pressure relief valve. The pressurizing device pressurizes the water injected into the pressurized heating device to achieve the preset water pressure required for the test. The heating device heats the water injected into the pressurized heating device to achieve the preset water temperature required for the test. Water can be injected through the water inlet 61 of the pressurized heating device, and the high-temperature, high-pressure water formed after heating and pressurization can be discharged through the water outlet of the pressurized heating device. Of course, the pressurized heating device also has the function of detecting water temperature and water pressure, and a water press with heating and pressurization functions can be used, as detailed below.

[0052] The connecting pipe 7 serves as the pipeline between the outlet of the pressurized heating device and the end of the sealing sleeve 41 of the sealing section 4. In nuclear power plants, the sealing sleeve 41 upstream of the sealing section 4 and the manual valve 3 are welded together. To facilitate the disassembly and assembly of the sealing sleeve 41 of the sealing section 4 and this test device, the sealing sleeve 41 and the manual valve 3 can be designed to be detachably connected. For example, the left end of the sealing sleeve 41 can be designed as a pipe thread, which facilitates the threaded connection with one end of the connecting pipe 7. Details are described below.

[0053] The shut-off valve 8 is installed in the connecting pipe 7 and is used to control the opening and closing of the connecting pipe 7;

[0054] The first pressure gauge 9 is installed in the connecting pipe 7 and is located between the end of the shut-off valve 8 and the sealing sleeve 41. It is used to detect and display the water pressure in the connecting pipe 7 and the sealing section 4.

[0055] The insulation component is used to cover the sealing section 4 and the finger sleeve 5 to provide insulation for the sealing section 4 and the finger sleeve 5, and to prevent the temperature of the high-temperature and high-pressure water in the sealing section 4 and the finger sleeve 5 from dropping.

[0056] Furthermore, after the finger sleeve simulator is assembled in the original manner on the downstream nut side of the sealing section 4, and this sealing performance testing device is connected to the sealing sleeve 41 of the sealing section 4, the sealing performance testing device can adopt the following testing process:

[0057] Open shut-off valve 8;

[0058] Deionized water is injected into the pressurized heating device through the water inlet 61. After the device is full, the water inlet 61 is closed. The deionized water will flow through the pressurized heating device to fill the sealing section 4 and the finger sleeve 5.

[0059] Start the pressurized heating device and maintain the temperature after the thermometer on the pressurized heating device displays 100±5℃; the pressurized heating device is equipped with a thermometer and a pressure gauge;

[0060] Start the pressurization heating device and set the pressure to 10MPa. After the pressure reaches 10MPa, close the shut-off valve 8 and maintain it for 3 minutes. Observe whether the reading of the first pressure gauge 9 drops.

[0061] Open the shut-off valve 8, set the pressure to 17.25 MPa, and close the shut-off valve 8 after the pressure reaches 17.25 MPa. Keep it closed for 3 minutes and observe whether the reading of the first pressure gauge 9 decreases.

[0062] Open the shut-off valve 8, set the pressure to 10MPa, and close the shut-off valve 8 after the pressure reaches 10MPa. Keep it closed for 3 minutes and observe whether the reading of the first pressure gauge 9 decreases.

[0063] like Figure 6 As shown, no pressure drop occurred in any of the three pressure-holding stages, which proves that the sealing performance of sealing section 4 meets the technical requirements.

[0064] Turn off the heating of the pressurized heating device, turn off the pressurization of the pressurized heating device, wait for the thermometer reading to drop to room temperature, and for the readings of the first pressure gauge 9 and the pressure gauge of the pressurized heating device to drop to 0MPa, then close the shut-off valve 8;

[0065] Open the insulation component and disconnect the connecting pipe 7;

[0066] Open the drain outlet 62 of the pressurized heating device to drain all the deionized water, and then close the drain outlet 62.

[0067] Test complete.

[0068] In other words, in the sealing test device provided by this solution, the injected water is heated and pressurized by a pressurizing and heating device to form high-temperature and high-pressure water. Then, the connecting pipe 7 is shut off by the shut-off valve 8, so that the high-temperature and high-pressure water is kept under pressure and kept warm in the sealing section 4 and the finger sleeve 5 for a period of time. Then, the first pressure gauge 9 is used to detect whether the water pressure in the sealing section 4 has dropped, thereby testing the sealing performance of the sealing section 4.

[0069] In this plan, such as Figure 5 As shown, the pressurized heating device 6 includes: a housing 65, a high-pressure chamber 66, a pressurizing device, and a heating device;

[0070] The casing 65 is provided with a water inlet 61;

[0071] The high-pressure chamber 66 is located inside the housing 65, and its first water inlet is connected to the water injection port 61;

[0072] The pressurizing device is installed inside the housing 65 and is used to pressurize the water injected into the high-pressure chamber 66 so that the water pressure reaches the preset water pressure.

[0073] The heating device is installed inside the housing 65 and is used to heat the water injected into the high-pressure chamber 66 so that the water temperature reaches the preset water temperature.

[0074] The connecting pipe 7 is used to connect the outlet of the high-pressure chamber 66 to the end of the sealing sleeve 41.

[0075] Among them, such as Figure 5 As shown, the housing 65 is also provided with a drain port, and the drain port of the high-pressure chamber 66 is connected to the drain port of the housing 65 through a pipe, which is also provided with a drain valve.

[0076] The pressurizing device is used to pressurize the water injected into the high-pressure chamber 66 to achieve a preset water pressure, such as the water pressure at the three stages mentioned above. The heating device is used to heat the water injected into the high-pressure chamber 66 to achieve a preset water temperature, such as the water temperature at 100±5℃ mentioned above, in order to simulate the actual water temperature (100±5℃) flowing through the sealing section 4. In other words, this solution, through the combined use of the pressurizing device and the heating device, facilitates the heating and pressurization of the water injected into the high-pressure chamber 66 to simulate the high-temperature and high-pressure water flowing through the sealing section 4.

[0077] Specifically, such as Figure 5 As shown, the pressurization device includes: a gear pump 67, a one-way valve 68, a first pipe, and a second pipe;

[0078] The first pipe is connected between the water inlet 61 and the first inlet of the high-pressure chamber 66;

[0079] The second pipe is connected between the water inlet 61 and the second inlet of the high-pressure chamber 66;

[0080] Gear pump 67 is installed in the first pipeline;

[0081] One-way valve 68 is installed in the second pipeline.

[0082] Water is injected through the water inlet 61 and simultaneously pumped into the high-pressure chamber 66 via the gear pump 67 and the check valve 68. Once the high-pressure chamber 66 is full, the gear pump 67 is activated to continue injecting water into the high-pressure chamber 66, so that the water pressure inside the high-pressure chamber 66 reaches the preset value. Of course, since the second pipe is equipped with the check valve 68, the water in the high-pressure chamber 66 will not flow back to the water inlet 61. In addition, the gear pump 67 serves as the main pressurizing component of the high-pressure chamber 66.

[0083] Furthermore, such as Figure 5 As shown, the heating device includes an electric heating rod 69 disposed in the high-pressure chamber 66.

[0084] The heating rod mounting base penetrates the cavity wall of the high-pressure chamber 66 and is sealed. The heating rod 69 is installed inside the high-pressure chamber 66 through the heating rod mounting base, and its heating rod terminals pass out of the high-pressure chamber 66 through the heating rod mounting base.

[0085] Furthermore, such as Figure 5 As shown, the pressurized heating device 6 has a thermometer 63, which is installed in the high-pressure chamber 66 and is used to detect the water temperature in the high-pressure chamber 66, that is, to detect the water temperature after the water has been heated by the heating device.

[0086] The pressurized heating device 6 has a second pressure gauge 64, which is installed in the connecting pipe 7. The second pressure gauge 64 is used to detect the water pressure at the outlet of the high-pressure chamber 66, that is, to detect the water pressure after the water has been pressurized by the pressurizing device. In other words, the thermometer 63 of the pressurized heating device 6 is used to detect and display the water temperature after it has been heated by the heating device in real time, and the second pressure gauge 64 of the pressurized heating device 6 is used to detect and display the water pressure after it has been pressurized by the pressurizing device in real time. This facilitates feedback on the heating and pressurization of the water.

[0087] In this plan, such as Figure 4 As shown, the insulation component includes an insulation box 10, which is assembled from insulation materials. The insulation box 10 can be a long box structure, and can be obtained by assembling multiple insulation boards. In this way, the sealing section 4 and the finger sleeve 5 (finger sleeve simulation body) can be located inside the insulation box 10, thereby achieving insulation for the sealing section 4 and the finger sleeve 5.

[0088] In addition, the insulation component includes a flexible insulation layer, which is used to wrap around the outside of the sealing section 4 and the finger sleeve 5. This insulation method facilitates the covering insulation of the sealing section 4 and the finger sleeve 5, resulting in better insulation performance. Furthermore, the flexible insulation layer can be made by wrapping the sealing section 4 and the finger sleeve with aluminum silicate fiber rolls, and then securing it with aluminum foil tape.

[0089] In other words, the insulation components provided by this sealing test device can be the aforementioned insulation box 10 or flexible insulation layer.

[0090] Specifically, one end of the connecting pipe 7 is threaded to the end of the sealing sleeve 41. The end of the sealing sleeve 41 and one end of the connecting pipe 7 may have an external thread and a mating internal thread, so that one end of the connecting pipe 7 and the end of the sealing sleeve 41 are connected by a pipe thread. This method of connection is tight and easy to disassemble.

[0091] Furthermore, the outer periphery of the connecting pipe 7 is wrapped with an insulation layer to give the connecting pipe 7 a heat preservation effect, so as to prevent the temperature of the high-temperature and high-pressure water flowing from the pressurized heating device 6 to the sealing section 4 from dropping, and to ensure that the temperature of the high-temperature and high-pressure water flowing to the sealing section 4 is maintained at a preset value.

[0092] Furthermore, such as Figure 4 As shown, the sealing test device provided in this embodiment of the present invention also includes a temperature sensor 11;

[0093] Temperature sensor 11 is used to insert into a preset position on the finger sleeve and to detect the water temperature between the outer wall of the finger sleeve and the sealing section 4. The inside of the finger sleeve is empty; its outer wall is sealed and welded, cooperating with the sealing ring and gasket of the sealing section 4 to form the pressure boundary of the primary water circuit. Figure 4 As shown, the temperature sensor 11 can be inserted into the deepest part of the finger sleeve (finger sleeve simulator) through the sleeve side and contact the inner wall of the finger sleeve to detect (and display) the water temperature between the outer wall of the finger sleeve and the sealing section 4, thereby providing feedback on the water temperature between the sealing section 4 and the outer wall of the finger sleeve; of course, the temperature sensor 11 can be a thermocouple.

[0094] Furthermore, to better understand this sealing test device, its operation process is further explained below:

[0095] The upstream sealing sleeve is connected to the hydraulic press (i.e., the pressurizing and heating device) via a threaded connection pipe;

[0096] Insert the finger sleeve into the sealing section, and seal the left end face of its flange with the end face of the sealing section. Tighten the upstream nut and downstream nut of the sealing section.

[0097] An insulation box is installed outside the sealing section and the finger sleeve;

[0098] Insert the temperature sensor into the deepest part of the finger sleeve;

[0099] Open the shut-off valve;

[0100] Deionized water is injected into the water press (i.e., the high-pressure chamber) through the water inlet, and the water inlet is closed after it is full.

[0101] After starting the heating device of the hydraulic press, the thermometer and temperature sensor both showed 100±5℃, and then the temperature was maintained.

[0102] Start the pressurizing device of the hydraulic press, set the pressure to 10MPa, and close the shut-off valve after the pressure reaches 10MPa. Maintain this pressure for 3 minutes and observe whether the reading of the first pressure gauge drops.

[0103] Open the shut-off valve, set the pressure to 17.25 MPa, and close the shut-off valve after the pressure reaches 17.25 MPa. Keep it closed for 3 minutes and observe whether the reading of the first pressure gauge decreases.

[0104] Open the shut-off valve, set the pressure to 10MPa, close the shut-off valve after the pressure reaches 10MPa, keep it for 3 minutes, and observe whether the reading of the first pressure gauge drops.

[0105] If no pressure drop occurs during any of the three pressure-holding stages, it proves that the sealing performance of the sealing section meets the technical requirements.

[0106] Turn off the heating device and pressurizing device of the water press, wait for the readings of the thermometer and temperature sensor to drop to room temperature, and for the readings of the two pressure gauges to drop to 0 MPa, then close the shut-off valve.

[0107] Remove the temperature sensor, open the insulation box, and disconnect the hydraulic press connection pipe;

[0108] Open the drain outlet to drain all deionized water, then close the drain outlet.

[0109] Test complete.

[0110] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0111] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing performance testing device for measuring the sealing performance of a sealed section (4) in a reactor core neutron flux measurement system, wherein, The downstream nut side of the sealing section (4) is equipped with a finger sleeve, characterized in that the sealing test device includes: a pressure heating device (6), a connecting pipe (7), a shut-off valve (8), a first pressure gauge (9), and a heat insulation component; The pressurized heating device (6) is provided with a water inlet (61) and a water outlet, and is used to pressurize and heat the injected water so that the water pressure and water temperature can reach the preset values. The connecting pipe (7) is used to connect between the outlet of the pressurized heating device (6) and the end of the sealing sleeve (41) of the sealing section (4); The shut-off valve (8) is disposed in the connecting pipe (7); The first pressure gauge (9) is installed in the connecting pipe (7) and is located between the end of the shut-off valve (8) and the sealing sleeve (41); The insulation component is used to cover the sealing section (4) and the finger sleeve.

2. The sealing performance testing device according to claim 1, characterized in that, The pressurized heating device (6) includes: a housing (65), a high-pressure chamber (66), a pressurizing device, and a heating device; The housing (65) is provided with the water inlet (61); The high-pressure chamber (66) is located inside the housing (65), and its first water inlet is connected to the water injection port (61); The pressurizing device is disposed inside the housing (65) and is used to pressurize the water injected into the high-pressure chamber (66) so that the water pressure reaches the preset water pressure; The heating device is disposed inside the housing (65) and is used to heat the water injected into the high-pressure chamber (66) so that the water temperature reaches the preset water temperature; The connecting pipe (7) is used to connect the outlet of the high-pressure chamber (66) to the end of the sealing sleeve (41).

3. The sealing performance testing device according to claim 2, characterized in that, The pressurization device includes: a gear pump (67), a one-way valve (68), a first pipeline and a second pipeline; The first pipe is connected between the water inlet (61) and the first inlet of the high-pressure chamber (66); The second pipe is connected between the water inlet (61) and the second inlet of the high-pressure chamber (66); The gear pump (67) is disposed in the first pipeline; The one-way valve (68) is located in the second pipeline.

4. The sealing performance testing device according to claim 2, characterized in that, The heating device includes an electric heating rod (69) disposed in the high-pressure chamber (66).

5. The sealing performance testing device according to claim 2, characterized in that, The pressurized heating device (6) has a thermometer (63), which is installed in the high-pressure chamber (66) and is used to detect the water temperature in the high-pressure chamber (66); The pressurized heating device (6) has a second pressure gauge (64), which is installed in the connecting pipe (7) and is used to detect the water pressure at the outlet of the high-pressure chamber (66).

6. The sealing performance testing device according to claim 1, characterized in that, The insulation component includes an insulation box (10) and is assembled from insulation materials.

7. The sealing performance testing device according to claim 1, characterized in that, The insulation component includes a flexible insulation layer and is used to wrap around the outside of the sealing section (4) and the finger sleeve.

8. The sealing performance testing device according to claim 1, characterized in that, One end of the connecting pipe (7) is threaded to the end of the sealing sleeve (41).

9. The sealing performance testing device according to claim 1, characterized in that, The outer peripheral wall of the connecting pipe (7) is wrapped with a heat insulation layer.

10. The sealing performance testing device according to claim 1, characterized in that, It also includes a temperature sensor (11); The temperature sensor (11) is used to insert into the preset position of the finger sleeve and to detect the water temperature between the outer wall of the finger sleeve and the sealing section (4).

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