Metal sealing ring testing device and metal sealing ring testing method

Abstract

The present application provides a metal sealing ring testing device and a metal sealing ring testing method, wherein, in the metal sealing ring testing device of the present application, two mutually separated first and second cavities are formed, separated by an inner mounting wall plate in the middle, and the sealing ring is installed between the inner mounting wall plate and the shell structure, which is used to realize the sealing separation of the two cavities, thereby simulating the installation structure scene where the sealing ring is located. At the same time, by means of the first and second air guide ports connected to the first and second cavities, and by means of the first and second heating devices to heat the first and second cavities, the pressure and temperature in the first and second cavities are adjusted to simulate the high-pressure and high-temperature environmental parameters on both sides of the sealing ring in actual use. In addition, by means of the first and second pressure detection devices, the pressure changes in the first and second cavities are monitored respectively, and by means of the first and second temperature detection devices, the temperature changes in the first and second cavities are monitored, and then the attenuation of the sealing performance of the sealing ring under high-pressure and high-temperature creep is evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of closed Brayton cycle power generation system component testing, and in particular to a metal sealing ring testing device and a metal sealing ring testing method. Background Art

[0002] Compared with traditional nuclear power generation devices, the helium closed Brayton cycle device (referred to as "helium turbine") has the characteristics of compact structure, high power generation efficiency and high safety. When the core outlet temperature reaches 950°C, the theoretical power generation efficiency can reach 50%. Due to the small size, high permeability and strong fluidity of helium molecules, its leakage problem is very prominent in helium turbines. Reasonable and efficient sealing measures can reduce the economic losses caused by helium leakage on the one hand, and on the other hand, they are of great significance for ensuring the stability of the internal pressure of the helium turbine and the efficient operation of the turbine.

[0003] Metal sealing rings are a commonly used static sealing method in helium turbines. According to different cross-sectional forms, they can be divided into C-type, E-type, U-type, O-type and other types. Helium turbines are usually in a state of high temperature and high pressure during operation, which puts higher requirements on the performance of sealing rings. In addition to requiring them to have good high temperature and high pressure resistance, they must also maintain sufficient elasticity and sealing.

[0004] Conventional seal ring test devices can generally only test seal rings made of low-temperature rubber materials, and cannot meet the test requirements of high-temperature and high-pressure metal seal rings under helium working fluid. At present, there is basically no test device for the helium sealing performance of metal seal rings under high-temperature and high-pressure conditions. Therefore, corresponding test devices are urgently needed to conduct comprehensive tests on the performance of seal rings. Summary of the invention

[0005] The purpose of the present application is to provide a metal sealing ring testing device and a metal sealing ring testing method, which can simulate the installation structure scenario of the metal sealing ring and simulate the high temperature and high pressure environmental parameters on both sides of the sealing ring, thereby realizing the sealing performance test of the metal sealing ring under high temperature and high pressure, so as to facilitate the evaluation of the performance attenuation of the metal sealing ring.

[0006] In a first aspect, the present application provides a metal sealing ring testing device, comprising a shell structure, an inner mounting wall panel, an end cover structure, a heating device, an air guide port, a pressure detection device, and a temperature detection device.

[0007] The shell structure is a cylindrical structure with openings at both ends, including an upper shell and a lower shell that are assembled from top to bottom. A first sealing half groove is arranged inside the upper shell, and a second sealing half groove is arranged inside the lower shell. After the upper shell and the lower shell are assembled from top to bottom, the first sealing half groove and the second sealing half groove are assembled to form a complete sealing groove. The inner mounting wall plate is adapted to the shape of the complete sealing groove, and its peripheral edge is installed in the complete sealing groove to separate the internal cavity of the shell structure into a first cavity and a second cavity that are isolated from each other; during testing, the sealing ring is installed between the complete sealing groove and the outer peripheral side wall of the inner mounting wall plate.

[0008] The end cap structure includes a first end cap sealing the opening of the first cavity and a second end cap sealing the opening of the second cavity, the heating device includes a first heating device arranged in the first cavity and a second heating device arranged in the second cavity, the air guide port includes a first air guide port connected to the inside of the first cavity and a second air guide port connected to the inside of the second cavity. The pressure detection device includes a first pressure detection device connected to the inside of the first cavity and a second pressure detection device connected to the inside of the second cavity, and the temperature detection device includes a first temperature detection device connected to the inside of the first cavity and a second temperature detection device connected to the inside of the second cavity.

[0009] In an operative solution, the first heating device comprises a fixed end and a heating wire end, the fixed end of the first heating device is mounted on the first end cover and leads out of the first cavity, and the heating wire end of the first heating device is placed in the first cavity. The second heating device comprises a fixed end and a heating wire end, the fixed end of the second heating device is mounted on the second end cover and leads out of the second cavity, and the heating wire end of the second heating device is placed in the second cavity.

[0010] In an implementable solution, the first air guide port is arranged on the first end cover, and the second air guide port is arranged on the second end cover.

[0011] In an implementable solution, a first pressure detection port and a first temperature detection port are provided on the shell structure corresponding to the first cavity part, and the first pressure detection port is used to install a first pressure detection device, and the first temperature detection port is used to install a first temperature detection device. A second pressure detection port and a second temperature detection port are provided on the shell structure corresponding to the second cavity part, and the second pressure detection port is used to install a second pressure detection device, and the second temperature detection port is used to install a second temperature detection device.

[0012] In an implementable solution, the metal sealing ring testing device includes a first valve and a second valve; the first end of the first valve is connected to the first air guide port, and the first end of the second valve is connected to the second air guide port.

[0013] In an implementable solution, the metal sealing ring testing device includes a first air supply device and a second air supply device; the first air supply device is connected to the second end of the first valve, and the second air supply device is connected to the second end of the second valve.

[0014] In an implementable solution, the metal sealing ring testing device includes a first vacuum pumping device and a second vacuum pumping device; the first vacuum pumping device is connected to the second end of the first valve, and the second vacuum pumping device is connected to the second end of the second valve.

[0015] In an implementable solution, the metal sealing ring testing device further includes a first thermal insulation layer, and the first thermal insulation layer is applied on both side surfaces of the inner installation wall panel.

[0016] In an implementable solution, the metal sealing ring testing device further includes a second thermal insulation layer, and the second thermal insulation layer is applied on the outer surface of the upper shell, the outer surface of the lower shell, the outer surface of the first end cover, and the outer surface of the second end cover.

[0017] In a second aspect, the present application further provides a metal sealing ring testing method, using the aforementioned metal sealing ring testing device, the metal sealing ring testing method comprises:

[0018] Assemble the metal seal ring test device;

[0019] Filling the first cavity with high-pressure target gas through the first gas inlet to replace the air in the first cavity, and filling it to the cold target pressure; filling the second cavity with high-pressure target gas through the second gas inlet to replace the air in the second cavity, and filling it to the cold target pressure;

[0020] The first cavity is heated by the first heating device until the first target temperature value is reached and maintained, and the second cavity is heated by the second heating device until the second target temperature value is reached and maintained;

[0021] Continue to adjust the air pressure of the first cavity to a first target pressure value through the first air guide port, and adjust the air pressure of the second cavity to a second target pressure value through the second air guide port; wherein the first target pressure value is not equal to the second target pressure value;

[0022] Cut off the first air inlet and the second air inlet, keep them for a preset time t, record the pressure changes in the first cavity and the second cavity respectively, and calculate the leakage to complete the sealing ring test.

[0023] Compared with the prior art, the beneficial effects of the present application include at least the following:

[0024] In the metal sealing ring testing device of the present application, two mutually separated first cavities and second cavities are formed, which are separated by an inner mounting wall panel in the middle. The tested sealing ring is installed between the inner mounting wall panel and the shell structure to achieve sealed separation of the two cavities. This can simulate the installation structure scenario of the sealing ring, providing a basis for subsequent sealing ring performance testing under high temperature and high pressure.

[0025] At the same time, by means of the first and second air guide ports connected to the first and second cavities, and by means of the first and second heating devices to heat the first and second cavities, convenient adjustment of the pressure and temperature in the first and second cavities is achieved, thereby better simulating the high pressure and high temperature environmental parameters on both sides of the sealing ring in actual use.

[0026] In addition, the first and second pressure detection devices are used to monitor the pressure changes in the first and second cavities respectively, and the first and second temperature detection devices are used to monitor the temperature changes in the first and second cavities, so as to evaluate the attenuation of the sealing performance of the sealing ring under high-pressure and high-temperature creep. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A top view of a metal sealing ring testing device shown in an embodiment of the present application.

[0029] Figure 2 This is a three-dimensional view of the first end cover side of the metal sealing ring testing device shown in an embodiment of the present application.

[0030] Figure 3 This is a three-dimensional view of the second end cover side of the metal sealing ring testing device shown in an embodiment of the present application.

[0031] Figure 4 for Figure 1 Exploded view of the metal seal ring testing device.

[0032] Figure 5 This is a three-dimensional diagram of the upper shell and the lower shell after being assembled according to the embodiment of the present application.

[0033] Figure 6 For along Figure 1 Section view of AA in the figure.

[0034] Figure 7 for Figure 1 Partial cross-section structure diagram of the metal sealing ring testing device.

[0035] Figure 8 This is a simplified diagram of the composition of a metal sealing ring testing device shown in an embodiment of the application.

[0036] Fig. 9 A three-dimensional diagram of a metal sealing ring testing device with a thermal insulation layer shown in an embodiment of the present application.

[0037] Fig.10 for Fig. 9 Exploded view of the metal seal ring test device.

[0038] Fig.11 for Fig. 9 Vertical cross-sectional view of the metal seal ring test device in FIG.

[0039] In the figure: 1, upper shell; 2, lower shell; 100, complete sealing groove; 101, first sealing half groove; 102, second sealing half groove; 201, first cavity; 202, second cavity; 301, first pressure detection port; 302, first temperature detection port; 401, second pressure detection port; 402, second temperature detection port; 3, inner mounting wall plate; 31, upper inner wall plate; 32, lower inner wall plate; 4, sealing ring; 5, first end cover; 6, second end cover; 7 , a first heating device; 8, a second heating device; 9, a first air inlet; 10, a second air inlet; 11, a first pressure detection device; 12, a second pressure detection device; 13, a first temperature detection device; 14, a second temperature detection device; 15, a first valve; 16, a second valve; 17, a first air supply device; 18, a second air supply device; 19, a first vacuum pumping device; 20, a second vacuum pumping device; 21, a first thermal insulation layer; 22, a second thermal insulation layer. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] like Figures 1 to 8 As shown, the present application provides a metal sealing ring testing device, including a shell structure, an inner mounting wall plate 3, an end cover structure, a heating device, an air guide port, a pressure detection device, and a temperature detection device.

[0043] See also Figure 4 and Figure 5The shell structure is a cylindrical structure with openings at both ends, including an upper shell 1 and a lower shell 2 that are assembled together. A first sealing half groove 101 is arranged on the inner side of the upper shell 1, and a second sealing half groove 102 is arranged on the lower shell 2. After the upper shell 1 and the lower shell 2 are assembled together, the first sealing half groove 101 and the second sealing half groove 102 are assembled together to form a complete sealing groove 100.

[0044] See also Figure 4 and Figure 6 The inner mounting wall panel 3 is adapted to the shape of the complete sealing groove 100, and its peripheral edge is installed in the complete sealing groove 100 to separate the internal cavity of the shell structure into a first cavity 201 and a second cavity 202 that are isolated from each other; during testing, the sealing ring 4 is installed between the complete sealing groove 100 and the outer peripheral side wall of the inner mounting wall panel 3.

[0045] See also Figure 2 , Figure 3 and Figure 6 The end cover structure includes a first end cover 5 sealing the opening of the first cavity 201 and a second end cover 6 sealing the opening of the second cavity 202 .

[0046] See also Figure 7 The heating device includes a first heating device 7 arranged in the first cavity 201 and a second heating device 8 arranged in the second cavity 202, and the air guide port includes a first air guide port 9 connected to the inside of the first cavity 201 and a second air guide port 10 connected to the inside of the second cavity 202.

[0047] See also Figure 8 The pressure detection device includes a first pressure detection device 11 connected to the inside of the first cavity 201 and a second pressure detection device 12 connected to the inside of the second cavity 202, and the temperature detection device includes a first temperature detection device 13 connected to the inside of the first cavity 201 and a second temperature detection device 14 connected to the inside of the second cavity 202.

[0048] When the metal sealing ring testing device of this embodiment is used to test the metal sealing ring, the sealing ring 4 is placed in the complete sealing groove 100 after splicing, and the inner mounting wall plate 3 is installed, the upper and lower shells are spliced ​​and assembled, and the end cover structure is installed. The air in the first cavity 201 and the second cavity 202 is replaced by the first air guide port 9 and the second air guide port 10, and is filled to the cold target pressure. Then, the temperature of the first cavity 201 and the second cavity 202 is heated to the target value by the first heating device 7 and the second heating device 8, respectively, and remains unchanged. After adjusting the initial value of the pressure in the first cavity 201 and the second cavity 202 on both sides of the inner mounting wall plate 3 to the target pressure, the first air guide port 9 and the second air guide port 10 are closed, and the temperature on both sides of the chamber is kept unchanged. Finally, after a predetermined time, the pressure changes of the cavities on both sides of the device are observed, and the gas state equation can be used to calculate the leakage of helium in time t.

[0049] In summary, in the metal sealing ring testing device of the present application, two mutually separated first cavities 201 and second cavities 202 are formed, which are separated by an inner mounting wall plate 3 in the middle. The tested sealing ring 4 is installed between the inner mounting wall plate 3 and the shell structure to achieve the sealed separation of the two cavities, thereby simulating the installation structure scenario used by the sealing ring. At the same time, with the help of the first and second air guide ports connected to the first and second cavities, and with the help of the first and second heating devices for heating the first and second cavities, the environmental characteristics of the sealing ring 4 in actual use can be simulated. In addition, the pressure changes in the first and second cavities can be monitored respectively with the help of the first and second pressure detection devices, and the temperature changes in the first and second cavities can be monitored with the help of the first and second temperature detection devices, so as to evaluate the attenuation of the sealing performance of the sealing ring 4 under high pressure and high temperature creep.

[0050] In one embodiment, if Figure 4 As shown, the inner installation wall panel 3 may include an upper inner wall panel 31 and a lower inner wall panel 32 , and the upper inner wall panel 31 and the lower inner wall panel 32 are assembled and spliced ​​to form the inner installation wall panel 3 .

[0051] In one embodiment, if Figure 7 As shown, the first heating device 7 includes a fixed end and a heating wire end, the fixed end of the first heating device 7 is mounted on the first end cover 5 and leads out of the first cavity 201, and the heating wire end of the first heating device 7 is placed in the first cavity 201. The second heating device 8 includes a fixed end and a heating wire end, the fixed end of the second heating device 8 is mounted on the second end cover 6 and leads out of the second cavity 202, and the heating wire end of the second heating device 8 is placed in the second cavity 202.

[0052] In one embodiment, the length of the heating wire end can be substantially close to the radial dimension of the cavity to achieve a faster heating effect.

[0053] In one embodiment, if Figure 7 As shown, the first air guide port 9 is provided on the first end cover 5, and the second air guide port 10 is provided on the second end cover 6. The air guide ports are convenient for exhausting air and for injecting high-pressure gas (such as high-pressure helium).

[0054] The first and second heating devices are respectively installed on the first and second end covers, and air guide ports are provided on the respective end covers to realize an integral assembly structure of the end covers, the heating devices and the air guide ports. This layout also helps to simplify the structural design, reduce pipeline connections, reduce the risk of leakage, and facilitate maintenance and replacement of the heating devices, thereby improving the reliability and safety of the system.

[0055] In one embodiment, if Figure 1 As shown, the first cavity 201 portion corresponding to the shell structure is provided with a first pressure detection port 301 and a first temperature detection port 302, the first pressure detection port 301 is used to install the first pressure detection device 11, and the first temperature detection port 302 is used to install the first temperature detection device 13. The second cavity 202 portion corresponding to the shell structure is provided with a second pressure detection port 401 and a second temperature detection port 402, the second pressure detection port 401 is used to install the second pressure detection device 12, and the second temperature detection port 402 is used to install the second temperature detection device 14.

[0056] This arrangement realizes real-time monitoring of the internal environment of the two cavities by respectively setting pressure and temperature detection ports on the shell structures corresponding to the first cavity and the second cavity. Such a design helps to accurately control and adjust the pressure and temperature of the first cavity 201 and the second cavity 202. Through real-time pressure and temperature data feedback, the working power of the first and second heating devices can be adjusted in time, and it is also convenient to adjust the high-pressure helium intake of the gas guide port in time.

[0057] In one embodiment, if Figure 8 As shown, the metal sealing ring testing device may include a first valve 15 and a second valve 16. The first end of the first valve 15 is connected to the first air guide port 9, and the first end of the second valve 16 is connected to the second air guide port 10. The first valve 15 and the second valve 16 are used to control the amount of gas entering the first and second cavities to achieve internal air pressure regulation. The first valve 15 and the second valve 16 can be manual valves, preferably electric valves (such as solenoid valves) to achieve faster switching action.

[0058] In one embodiment, if Figure 8As shown, the metal sealing ring testing device may include a first gas supply device 17 and a second gas supply device 18; the first gas supply device 17 is connected to the second end of the first valve 15, and the second gas supply device 18 is connected to the second end of the second valve 16. For example, the first gas supply device 17 and the second gas supply device 18 may both be high-pressure helium tanks (or helium bottles), or the first gas supply device 17 and the second gas supply device 18 may use one high-pressure helium tank, and the gas pressure values ​​in the first cavity 201 and the second cavity 202 are controlled by controlling the switching time of the first valve 15 and the second valve 16.

[0059] In one embodiment, if Figure 8 As shown, the metal sealing ring testing device may include a first vacuum pumping device 19 and a second vacuum pumping device 20; the first vacuum pumping device 19 is connected to the second end of the first valve 15, and the second vacuum pumping device 20 is connected to the second end of the second valve 16. Before the high-pressure helium is filled into the first cavity 201 and the second cavity 202, the first vacuum pumping device 19 and the second vacuum pumping device 20 are used to perform vacuum pumping operations on the first cavity 201 and the second cavity 202 respectively to remove the air in the cavity.

[0060] In one embodiment, if Fig.10 and Fig.11 As shown, the metal sealing ring testing device may further include a first thermal insulation layer 21 , and the first thermal insulation layer 21 is applied on both side surfaces of the inner installation wall panel 3 .

[0061] The first insulation layer 21 is laid on both side surfaces of the inner installation wall panel 3, which can effectively prevent the temperature transfer between the first cavity 201 and the second cavity 202, improve energy efficiency, and better control the temperature in the test cavity to ensure the accuracy of the test conditions.

[0062] Furthermore, in the metal sealing ring test device, the pressure and temperature in the first and second cavities on both sides of the sealing ring 4 are usually different, so the provision of the first thermal insulation layer 21 is very important. It can effectively reduce the temperature transfer between the first cavity 201 and the second cavity 202, thereby ensuring that each cavity can independently control and maintain the required temperature conditions to simulate the heat load and pressure load of the sealing ring in the actual working environment, thereby significantly improving the accuracy and reliability of the test.

[0063] In one embodiment, if Fig. 9 , Fig.10 and Fig.11 As shown, the metal sealing ring testing device also includes a second thermal insulation layer 22 , and the second thermal insulation layer 22 is applied on the outer surface of the upper shell 1 , the outer surface of the lower shell 2 , the outer surface of the first end cover 5 , and the outer surface of the second end cover 6 .

[0064] The embodiment of the present application further provides a metal sealing ring testing method, using the aforementioned metal sealing ring testing device, the metal sealing ring testing method includes:

[0065] S1. Assemble the metal sealing ring test device;

[0066] S2, charging high-pressure target gas through the first gas inlet 9 to replace the air in the first cavity 201, and charging to the cold target pressure; charging high-pressure target gas through the second gas inlet 10 to replace the air in the second cavity 202, and charging to the cold target pressure;

[0067] S3, heating the first cavity 201 by the first heating device 7 until the first target temperature value is reached and maintained, and heating the second cavity 202 by the second heating device 8 until the second target temperature value is reached and maintained;

[0068] S4, continue to adjust the air pressure of the first cavity 201 to a first target pressure value through the first air guide port 9, and adjust the air pressure of the second cavity 202 to a second target pressure value through the second air guide port 10; wherein the first target pressure value is not equal to the second target pressure value;

[0069] S5, cutting off the first air guide port 9 and the second air guide port 10, maintaining the pressure for a preset time t, respectively recording the pressure changes in the first cavity 201 and the second cavity 202, and calculating the leakage, thereby completing the sealing ring test.

[0070] Specifically, it is assumed that the chamber volumes of the first cavity 201 and the second cavity 202 are both V. In step S3, the first target temperature value is T1, and the second target temperature value is T2. In step S4, the first target pressure value is P1, the second target pressure value is P2, and P1>P2. Therefore, before the preset time t of step S5 is performed, the initial pressure and temperature condition parameters reached by the first cavity 201 are P1 and T1 respectively, and the initial pressure and temperature condition parameters reached by the second cavity 202 are P2 and T2 respectively.

[0071] It is further assumed that in step S5, after a preset time t, P1 changes to P1', P2 changes to P2', and T1 and T2 are kept unchanged by the heating device.

[0072] According to the state equation, we can get:

[0073] The mass of helium on the high pressure side (first cavity 201) in the initial state: M1 = P1 / R / T1*V;

[0074] The mass of helium on the low-pressure side (the second cavity 202) in the initial state: M2 = P2 / R / T2*V;

[0075] The mass of helium on the high pressure side (first cavity 201) at time t: M1'= P1' / R / T1*V;

[0076] The mass of helium on the low-pressure side (the second cavity 202) at time t: M2'= P2' / R / T2*V;

[0077] Then the helium leaked through the sealing ring: deltM=M1-M1'=(P1-P1') / R / T1*V;

[0078] Therefore, the average leakage rate is σ=deltM / t.

[0079] In summary, when the metal sealing ring testing device of the present application is used to test the sealing ring, the pressure and temperature on both sides of the sealing ring can be simulated, and the temperature and pressure can be easily adjusted. No precision instruments are required. After obtaining the pressure and temperature parameters of the two chambers, the leakage amount can be calculated by using the state equation, so that the attenuation of the sealing performance of the sealing ring under high pressure and high temperature creep can be conveniently examined.

[0080] The above description is only a partial embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A metal sealing ring testing device, characterized in that: Used to test the metal sealing ring used in the high temperature and high pressure helium working medium environment in the helium turbine, the metal sealing ring testing device comprises: The shell structure is a cylindrical structure with openings at both ends, comprising an upper shell (1) and a lower shell (2) which are assembled from top to bottom, wherein a first sealing half groove (101) is provided on the inner side of the upper shell (1), and a second sealing half groove (102) is provided on the lower shell (2), and after the upper shell (1) and the lower shell (2) are assembled from top to bottom, the first sealing half groove (101) and the second sealing half groove (102) are assembled to form a complete sealing groove (100); An inner mounting wall plate (3) is adapted to the shape of the complete sealing groove (100), and its outer peripheral edge is mounted in the complete sealing groove (100) to separate the inner cavity of the shell structure into a first cavity (201) and a second cavity (202) that are isolated from each other; during testing, a sealing ring (4) is mounted between the complete sealing groove (100) and the outer peripheral side wall of the inner mounting wall plate (3); An end cover structure, comprising a first end cover (5) sealing an opening of the first cavity (201) and a second end cover (6) sealing an opening of the second cavity (202); A heating device, comprising a first heating device (7) arranged in the first cavity (201) and a second heating device (8) arranged in the second cavity (202); An air guide port, comprising a first air guide port (9) connected to the interior of the first cavity (201) and a second air guide port (10) connected to the interior of the second cavity (202); A pressure detection device, comprising a first pressure detection device (11) connected to the interior of the first cavity (201) and a second pressure detection device (12) connected to the interior of the second cavity (202); A temperature detection device, comprising a first temperature detection device (13) connected to the interior of the first cavity (201) and a second temperature detection device (14) connected to the interior of the second cavity (202); a first valve (15) and a second valve (16), wherein a first end of the first valve (15) is connected to the first air guide port (9), and a first end of the second valve (16) is connected to the second air guide port (10); A first air supply device (17) and a second air supply device (18), wherein the first air supply device (17) is connected to a second end of the first valve (15), and the second air supply device (18) is connected to a second end of the second valve (16).

2. The metal sealing ring testing device according to claim 1, characterized in that: The first heating device (7) comprises a fixed end and a heating wire end, the fixed end of the first heating device (7) is mounted on the first end cover (5) and leads out of the first cavity (201), and the heating wire end of the first heating device (7) is placed in the first cavity (201); The second heating device (8) comprises a fixed end and a heating wire end, the fixed end of the second heating device (8) is mounted on the second end cover (6) and leads out of the second cavity (202), and the heating wire end of the second heating device (8) is placed in the second cavity (202).

3. The metal sealing ring testing device according to claim 1, characterized in that: The first air guide port (9) is arranged on the first end cover (5), and the second air guide port (10) is arranged on the second end cover (6).

4. The metal sealing ring testing device according to claim 1, characterized in that: A first pressure detection port (301) and a first temperature detection port (302) are provided on the shell structure corresponding to the first cavity (201); the first pressure detection port (301) is used to install the first pressure detection device (11), and the first temperature detection port (302) is used to install the first temperature detection device (13); A second pressure detection port (401) and a second temperature detection port (402) are provided on the shell structure corresponding to the second cavity (202); the second pressure detection port (401) is used for installing the second pressure detection device (12), and the second temperature detection port (402) is used for installing the second temperature detection device (14).

5. The metal sealing ring testing device according to claim 1, characterized in that: It comprises a first vacuum pumping device (19) and a second vacuum pumping device (20); the first vacuum pumping device (19) is connected to the second end of the first valve (15), and the second vacuum pumping device (20) is connected to the second end of the second valve (16).

6. The metal sealing ring testing device according to any one of claims 1 to 5, characterized in that: It also includes a first thermal insulation layer (21), which is applied on both side surfaces of the inner installation wall panel (3).

7. The metal sealing ring testing device according to claim 6, characterized in that: It also includes a second thermal insulation layer (22), and the second thermal insulation layer (22) is applied on the outer surface of the upper shell (1), the outer surface of the lower shell (2), the outer surface of the first end cover (5), and the outer surface of the second end cover (6).

8. A metal sealing ring testing method, characterized in that: Using the metal sealing ring testing device as described in any one of claims 1 to 7, the metal sealing ring testing method comprises: Assemble the metal seal ring test device; High-pressure target gas is charged through the first gas guide port (9) to replace the air in the first cavity (201), and the cavity is charged to a cold target pressure; high-pressure target gas is charged through the second gas guide port (10) to replace the air in the second cavity (202), and the cavity is charged to a cold target pressure; The first cavity (201) is heated by a first heating device (7) until a first target temperature value is reached and maintained constant, and the second cavity (202) is heated by a second heating device (8) until a second target temperature value is reached and maintained constant; Continue to adjust the air pressure of the first cavity (201) to a first target pressure value through the first air guide port (9), and adjust the air pressure of the second cavity (202) to a second target pressure value through the second air guide port (10); wherein the first target pressure value is not equal to the second target pressure value; The first air guide port (9) and the second air guide port (10) are cut off, and after maintaining the pressure for a preset time t, the pressure changes in the first cavity (201) and the second cavity (202) are respectively recorded, and the leakage amount is calculated to complete the sealing ring test.

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