High-temperature and high-pressure sealing gasket for gas valve of solid engine

Abstract

The invention relates to a high-temperature and high-pressure sealing gasket for a gas valve of a solid engine, belongs to the technical field of sealing structures, and solves the problems that an existing sealing gasket is easy to loosen and leak in a high-temperature and high-pressure environment. The gasket comprises a first gasket single body and a second gasket single body, a first shaft hole, a first groove and a first communicating groove are formed in the first gasket single body, and the first communicating groove communicates with the first shaft hole and the first groove; a second shaft hole, a second groove and a second communicating groove are formed in the second gasket single body, and the second communicating groove communicates with the second shaft hole and the second groove; the inner wall faces of the first shaft hole and the second shaft hole are attached to the circumferential surface of the valve element. The second groove and the first groove are buckled to form an air channel; the second communicating groove and the first communicating groove are buckled to form a communicating hole, and the communicating hole guides leaked high-temperature and high-pressure fuel gas into the gas channel. The pressure of leaked high-temperature and high-pressure fuel gas can be reduced, the high-temperature and high-pressure sealing gasket is deformed, self-tightening sealing is achieved, and leakage of the high-temperature and high-pressure fuel gas is prevented.

Description

Technical Field

[0001] This invention relates to the field of sealing structure technology, and in particular to a high-temperature and high-pressure sealing gasket for a solid fuel engine gas valve. Background Technology

[0002] The sealing conditions at the gas valve of a solid rocket motor are extremely harsh, requiring gaskets that can withstand pressures above 20MPa and temperatures above 1000℃. Existing gaskets are prone to creep and loosening of fasteners under high temperature and pressure conditions, leading to leakage. Therefore, it is particularly important to design a gasket that can self-tighten and seal to withstand harsh conditions of pressures above 20MPa and temperatures above 1000℃. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide a high-temperature and high-pressure sealing gasket for solid fuel engine gas valves, in order to solve the problem that existing sealing gaskets are prone to loosening under high-temperature and high-pressure environments, leading to easy leakage of high-temperature and high-pressure gas.

[0004] The objective of this invention is mainly achieved through the following technical solutions:

[0005] A high-temperature and high-pressure sealing gasket for a solid fuel engine gas valve is disclosed. The high-temperature and high-pressure sealing gasket is installed in the sealing cavity of the valve body in the gas valve to seal the valve core. The high-temperature and high-pressure sealing gasket includes a first gasket unit and a second gasket unit, which can be snapped together to provide a self-tightening seal for the valve core.

[0006] Furthermore, the first gasket unit is provided with a first shaft hole, and the inner wall surface of the first shaft hole can fit with the circumferential surface of the valve core.

[0007] Furthermore, the second gasket unit is provided with a second shaft hole, and the inner wall surface of the second shaft hole can fit against the circumferential surface of the valve core.

[0008] Furthermore, the first gasket unit is also provided with a first groove and a first connecting groove, the first groove and the first connecting groove being located on the end face of the first gasket unit; one end of the first connecting groove is connected to the first shaft hole, and the other end is connected to the first groove.

[0009] Furthermore, the second gasket unit is also provided with a second groove and a second connecting groove, the second groove and the second connecting groove being located on the end face of the second gasket unit; one end of the second connecting groove is connected to the second shaft hole, and the other end is connected to the second groove.

[0010] Furthermore, the structure of the second trench is the same as that of the first trench; the structure of the second connecting groove is the same as that of the first connecting groove.

[0011] Furthermore, the first groove is annular; the second groove is annular.

[0012] Furthermore, the first groove is coaxially arranged with the first shaft hole, and the second groove is coaxially arranged with the second shaft hole.

[0013] Furthermore, the first gasket unit is also provided with a first deformation joint.

[0014] Furthermore, the second gasket unit is also provided with a second expansion joint.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0016] (1) This invention provides a high-temperature and high-pressure sealing gasket for a solid fuel engine gas valve, comprising a first gasket unit and a second gasket unit. The first and second gasket units can be fastened together for self-tightening sealing of the valve core. The first gasket unit has a first shaft hole, a first groove, and a first connecting groove. The inner wall of the first shaft hole is in contact with the circumferential surface of the valve core, and the first connecting groove connects the first shaft hole and the first groove. The second gasket unit has a second shaft hole, a second groove, and a second connecting groove. The inner wall of the second shaft hole is in contact with the circumferential surface of the valve core, and the second connecting groove connects the second shaft hole and the second groove. The second gasket unit is fastened onto the first gasket unit, and the second groove and the first groove fasten together to form an air passage. The second connecting groove and the first connecting groove fasten together to form a connecting hole, which is used to release high-pressure gas leaking along the circumferential surface of the valve core. High-temperature, high-pressure gas is guided into the gas passage. This invention guides the high-temperature, high-pressure gas leaking along the circumferential surface of the valve core into the gas passage through a connecting hole. This not only reduces the pressure of the leaking high-temperature, high-pressure gas, preventing it from leaking further along the circumferential surface of the valve core, but also allows the leaking high-temperature, high-pressure gas to accumulate within the gas passage and compress the inner wall of the passage, causing it to expand. This, in turn, deforms the high-temperature, high-pressure sealing gasket. However, due to the axial and radial constraints on the high-temperature, high-pressure sealing gasket within the sealing cavity, the gasket undergoes radial deformation towards the valve core. This further ensures that the inner walls of the first and second shaft holes fit more closely to the circumferential surface of the valve core, further enhancing the sealing performance. The high-temperature, high-pressure sealing gasket can achieve a self-tightening seal according to the pressure changes of the high-temperature, high-pressure gas, preventing the gas from leaking outwards along the axial direction of the valve core.

[0017] (2) The present invention also provides multiple first grooves, which are connected by a first connecting groove; multiple second grooves are provided, which are connected by a second connecting groove; the number of second grooves is equal to the number of first grooves; after the second gasket unit is fastened to the first gasket unit, multiple air passages are formed, which are connected by a connecting hole; when high temperature and high pressure gas leaks out through the circumferential surface of the valve core, the high temperature and high pressure gas first quickly fills the air passage near the first shaft hole through the connecting hole, causing the air passage to expand rapidly, thereby causing the high temperature and high pressure sealing gasket to quickly produce local radial deformation, quickly perform preliminary self-tightening sealing, and prevent high temperature and high pressure gas leakage; If the high-temperature, high-pressure gas continues to leak at this time, the leaking high-temperature, high-pressure gas will gradually fill other gas passages through the connecting hole, thereby causing the high-temperature, high-pressure sealing gasket to undergo complete radial deformation, achieving a complete self-tightening seal and preventing the leakage of high-temperature, high-pressure gas. In this invention, the leaking high-temperature, high-pressure gas is first quickly filled into the gas passage near the first shaft hole through the connecting hole, causing the gas passage to expand rapidly, causing the high-temperature, high-pressure sealing gasket to quickly undergo local radial deformation, achieving a rapid initial self-tightening seal. Then, by gradually filling multiple gas passages with high-temperature, high-pressure gas, the high-temperature, high-pressure sealing gasket achieves a complete self-tightening seal, improving the response efficiency of the high-temperature, high-pressure sealing gasket's self-tightening seal.

[0018] (3) The present invention also forms a rotary labyrinth structure by the fact that the first connecting grooves on two adjacent first grooves are not on the same straight line; the second connecting grooves on two adjacent second grooves are not on the same straight line, thus forming a rotary labyrinth structure; after the second gasket unit is fastened to the first gasket unit, a rotary labyrinth air passage is formed. When the high temperature and high pressure gas leaks out through the circumferential surface of the valve core, the high temperature and high pressure gas first quickly fills the air passage near the first shaft hole through the connecting hole. Since the connecting holes of two adjacent air passages are not on the same straight line, the high temperature and high pressure gas leaking out of the air passage near the first shaft hole will collide with the inner wall of the air passage, delaying the leakage of the high temperature and high pressure gas into other air passages adjacent to the air passage, so that the leakage of the high temperature and high pressure gas quickly fills the air passage, thereby causing the air passage to expand rapidly, thereby causing the high temperature and high pressure sealing gasket to quickly produce local radial deformation, quickly perform preliminary self-tightening sealing, and prevent the leakage of high temperature and high pressure gas.

[0019] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0020] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0021] Figure 1 This is a schematic diagram of the installation structure of the high-temperature and high-pressure sealing gasket in the gas valve of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the high-temperature and high-pressure sealing gasket in Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the first gasket monomer in Embodiment 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the second gasket monomer in Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the first gasket monomer in Embodiment 2 of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the second gasket monomer in Embodiment 2 of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the first gasket monomer in Embodiment 3 of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the second gasket monomer in Embodiment 3 of the present invention.

[0029] Figure label:

[0030] 100. Valve body;

[0031] 200. Valve core;

[0032] 300, First gasket unit; 301, First shaft hole; 302, First groove; 303, First connecting groove; 304, First expansion joint; 305, First elastic seal; 306, Limiting groove;

[0033] 400, Second gasket unit; 401, Second shaft hole; 402, Second groove; 403, Second connecting groove; 404, Second expansion joint; 405, Second elastic seal; 406, Limit pin. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and are used together with the invention to illustrate the principles of the invention.

[0035] Example 1

[0036] In one specific embodiment of the present invention, a high-temperature and high-pressure sealing gasket for a solid combustion engine gas valve is disclosed. The gas valve is installed between the combustion chamber and the nozzle of the solid combustion engine to control the flow rate of the high-temperature and high-pressure gas generated in the combustion chamber through the nozzle. Figure 1 As shown, the high-temperature and high-pressure sealing gasket is installed in the sealing cavity of the valve body 100 in the gas valve to seal the valve core 200 in the gas valve, preventing the high-temperature and high-pressure gas generated in the combustion chamber from leaking out along the circumferential surface of the valve core 200, thereby achieving the sealing of the gas valve and preventing the leakage of high-temperature and high-pressure gas.

[0037] Preferably, such as Figure 2 , Figure 3 and Figure 4 As shown, the high-temperature and high-pressure sealing gasket includes a first gasket unit 300 and a second gasket unit 400. The first gasket unit 300 has a first shaft hole 301, through which the valve core 200 can pass and move along the axis of the first shaft hole 301. The diameter of the first shaft hole 301 is equal to the diameter of the valve core 200, thereby making the inner wall surface of the first shaft hole 301 fit against the circumferential surface of the valve core 200, achieving a seal on the valve core 200 and preventing high temperatures generated in the combustion chamber. High-pressure gas leaks out along the circumferential surface of the valve core 200; the second gasket unit 400 is provided with a second shaft hole 401, through which the valve core 200 can pass and move along the axis of the second shaft hole 401; the diameter of the second shaft hole 401 is equal to the diameter of the valve core 200, so that the inner wall surface of the second shaft hole 401 fits against the circumferential surface of the valve core 200, thereby sealing the valve core 200 and preventing the high-temperature and high-pressure gas generated in the combustion chamber from leaking out along the circumferential surface of the valve core 200.

[0038] Preferably, the first gasket unit 300 is further provided with a first groove 302 and a first connecting groove 303, the first groove 302 and the first connecting groove 303 being located on the end face of the first gasket unit 300; the first groove 302 is annular; one end of the first connecting groove 303 is connected to the first shaft hole 301, and the other end is connected to the first groove 302; the second gasket unit 400 is further provided with a second groove 402 and a second connecting groove 403, the second groove 402 and the second connecting groove 403 being located on the end face of the second gasket unit 400; the second groove 402 is annular; one end of the second connecting groove 403 is connected to the second shaft hole 401, and the other end is connected to the second groove 402; the structure of the second groove 402 is the same as the structure of the first groove 302, and the structure of the second connecting groove 403 is the same as the structure of the first connecting groove 303;

[0039] In use, the second gasket unit 400 is fastened onto the first gasket unit 300 and installed in the sealing cavity of the valve body 100 in the gas valve. The valve core 200 passes through the first shaft hole 301 and the second shaft hole 401 in sequence to seal the valve core 200. At this time, the second groove 402 is fastened with the first groove 302 to form a gas passage; the second connecting groove 403 is fastened with the first connecting groove 303 to form a connecting hole. The connecting hole is used to guide the high-temperature and high-pressure gas leaking along the circumferential surface of the valve core 200 into the gas passage, thereby reducing the pressure of the leaked high-temperature and high-pressure gas and preventing the high-temperature and high-pressure gas from leaking along the circumferential surface of the valve core 200. The leaked high-temperature and high-pressure gas accumulates in the gas passage and compresses the inner wall of the gas passage, causing the gas passage to expand. This, in turn, causes the high-temperature and high-pressure sealing gasket to deform. However, due to the axial and radial limiting effect of the sealing cavity on the high-temperature and high-pressure sealing gasket, the high-temperature and high-pressure sealing gasket undergoes radial deformation toward the valve core 200. This further causes the inner wall surfaces of the first shaft hole 301 and the second shaft hole 401 to fit more closely with the circumferential surface of the valve core 200, further improving the sealing performance. This allows the high-temperature and high-pressure sealing gasket to achieve self-tightening sealing according to the pressure changes of the high-temperature and high-pressure gas, preventing the high-temperature and high-pressure gas from leaking outwards along the axial direction of the valve core 200.

[0040] Preferably, the first groove 302 is coaxially arranged with the first shaft hole 301, and the second groove 402 is coaxially arranged with the second shaft hole 401. This allows the high-temperature and high-pressure gasket to undergo uniform radial deformation when the high-temperature and high-pressure gasket is filled into the gas passage through the connecting hole. Consequently, the inner wall surfaces of the first shaft hole 301 and the second shaft hole 401 can uniformly fit against the circumferential surface of the valve core 200, and the contact area between the inner wall surfaces of the first shaft hole 301 and the second shaft hole 401 and the circumferential surface of the valve core 200 is increased, thereby improving the sealing effect.

[0041] Preferably, multiple first connecting grooves 303 are provided, and the number of second connecting grooves 403 is the same as the number of first connecting grooves 303, so that after the second gasket unit 400 is fastened to the first gasket unit 300, multiple connecting holes are formed, thereby guiding the high-temperature and high-pressure gas leaking along the circumferential surface of the valve core 200 at different locations into the gas passage, thereby further improving the sealing effect.

[0042] Preferably, the first gasket unit 300 is further provided with a first deformation joint 304. The first deformation joint 304 is used to ensure that the first gasket unit 300 has a deformation margin under high temperature and high pressure conditions, thereby preventing the first gasket unit 300 from cracking due to thermal stress.

[0043] Preferably, the second gasket unit 400 is further provided with a second deformation joint 404. The second deformation joint 404 is used to ensure that the second gasket unit 400 has a deformation margin under high temperature and high pressure conditions, thereby preventing the second gasket unit 400 from cracking due to thermal stress.

[0044] Preferably, the first expansion joint 304 and the second expansion joint 404 are staggered to prevent the first expansion joint 304 and the second expansion joint 404 from connecting to form a complete leakage channel, causing high-temperature and high-pressure gas leakage.

[0045] Preferably, the first expansion joint 304 and the second expansion joint 404 are offset by 180°.

[0046] Preferably, the first gasket unit 300 is further provided with a first elastic sealing element 305, which fills the first deformation joint 304 and can contract with the first deformation joint 304 to seal the first deformation joint 304 and prevent high temperature and high pressure gas from leaking from the first deformation joint 304.

[0047] Preferably, the second gasket unit 400 is further provided with a second elastic seal 405, which fills the second deformation joint 404 and can contract with the second deformation joint 404 to seal the second deformation joint 404 and prevent high temperature and high pressure gas from leaking from the second deformation joint 404.

[0048] Preferably, the high-temperature and high-pressure sealing gasket further includes a limiting structure, which includes a limiting groove 306 and a limiting pin 406. The limiting groove 306 is disposed on the first gasket unit 300 and is located on the same end face as the first groove 302. The limiting pin 406 is disposed on the second gasket unit 400 and is located on the same end face as the second groove 402. The limiting pin 406 can be inserted into the limiting groove 306.

[0049] In use, when the second gasket unit 400 is fastened to the first gasket unit 300, the limiting pin 406 can be inserted into the limiting groove 306, thereby restricting the relative rotation of the second gasket unit 400 and the first gasket unit 300, thus keeping the first deformation joint 304 and the second deformation joint 404 misaligned, preventing the first deformation joint 304 and the second deformation joint 404 from connecting to form a complete leakage channel; the limiting structure also has a positioning function, so that when the second gasket unit 400 is fastened to the first gasket unit 300, the second groove 402 can remain opposite to the first groove 302, thereby forming a sealed air passage; and the second connecting groove 403 can remain opposite to the first connecting groove 303, thereby forming a sealed connecting hole.

[0050] Preferably, the cross-sectional dimension of the limiting pin 406 is smaller than that of the limiting pin 406, that is, when the limiting pin 406 is inserted into the limiting groove 306, it can also move within the limiting groove 306, thereby allowing the first gasket unit 300 and the second gasket unit 400 to maintain a margin of movement in the radial and circumferential directions, so that the first gasket unit 300 and the second gasket unit 400 can deform in the radial direction.

[0051] Preferably, the depth of the first groove 302 is less than 1 / 3 of the thickness of the first gasket unit 300, so that the first gasket unit 300 can maintain its original structural strength and avoid excessive deformation of the first gasket unit 300, which would cause irreversible damage; at the same time, it can also prevent the first gasket unit 300 from deforming axially.

[0052] Preferably, the depth of the second groove 402 is less than 1 / 3 of the thickness of the second gasket unit 400, so that the second gasket unit 400 can maintain its original structural strength and avoid excessive deformation of the second gasket unit 400, which would cause irreversible damage; at the same time, it can also prevent the second gasket unit 400 from deforming axially.

[0053] Preferably, the first gasket unit 300 is made of hard graphite; the first elastic seal 305 and the second elastic seal 405 are both made of flexible graphite.

[0054] Example 2

[0055] Example 2 is a further improvement based on Example 1, such as... Figure 5 and Figure 6As shown, multiple first grooves 302 are provided, and the multiple first grooves 302 are connected through a first connecting groove 303; multiple second grooves 402 are provided, and the multiple second grooves 402 are connected through a second connecting groove 403; in this embodiment, the number of second grooves 402 is equal to the number of first grooves 302. After the second gasket unit 400 is fastened onto the first gasket unit 300, multiple air passages are formed, and the multiple air passages are connected through connecting holes; when high-temperature and high-pressure gas leaks out through the circumferential surface of the valve core 200, the high-temperature and high-pressure gas first quickly fills the air passage near the first shaft hole 301 through the connecting hole, causing the air passage to expand rapidly, thereby causing the high-temperature and high-pressure sealing gasket to quickly produce local radial deformation, quickly perform preliminary self-tightening sealing, and prevent high-temperature and high-pressure gas leakage; if at this time, high temperature If the high-pressure gas continues to leak, the leaking high-temperature and high-pressure gas will gradually fill other gas channels through the connecting hole, thereby causing the high-temperature and high-pressure sealing gasket to undergo complete radial deformation and achieve a complete self-tightening seal, preventing the leakage of high-temperature and high-pressure gas. Compared with the single gas channel in Embodiment 1, in Embodiment 2, where the total volume of multiple gas channels is the same as that of a single gas channel in Embodiment 1, the leaking high-temperature and high-pressure gas can be quickly filled into the gas channel near the first shaft hole 301 through the connecting hole, causing the gas channel to expand rapidly. This causes the high-temperature and high-pressure sealing gasket to undergo rapid local radial deformation and achieve a rapid initial self-tightening seal. Then, by gradually filling multiple gas channels with high-temperature and high-pressure gas, the high-temperature and high-pressure sealing gasket achieves a complete self-tightening seal, improving the response efficiency of the high-temperature and high-pressure sealing gasket's self-tightening seal.

[0056] Preferably, the first connecting groove 303 is a gradient groove, that is, the transverse overlapping surface size of the first connecting groove 303 gradually decreases from the axis of the first gasket unit 300 towards the outer circumference; the second connecting groove 403 is a gradient groove, that is, the transverse overlapping surface size of the second connecting groove 403 gradually decreases from the axis of the second gasket unit 400 towards the outer circumference; when the second gasket unit 400 is fastened onto the first gasket unit 300, a gradient connecting hole is formed, thereby increasing the flow rate of high-temperature and high-pressure gas leaking out through the circumferential surface of the valve core 200 into the gas passage near the first shaft hole 301, shortening the time for the leaked high-temperature and high-pressure gas to fill the gas passage near the first shaft hole 301, thereby increasing the expansion speed of the gas passage, and thus improving the response efficiency of the high-temperature and high-pressure sealing gasket to quickly generate local radial deformation.

[0057] Preferably, the cross-sectional dimensions of the plurality of first grooves 302 gradually decrease from the axis of the first gasket unit 300 towards the outer circumference; the cross-sectional dimensions of the plurality of second grooves 402 gradually decrease from the axis of the second gasket unit 400 towards the outer circumference; when the second gasket unit 400 is fastened onto the first gasket unit 300, the volume of the plurality of air passages formed gradually decreases from the axis of the first gasket unit 300 towards the outer circumference, thereby enabling more leaked high-temperature and high-pressure gas to fill the air passages near the first shaft hole 301, thereby increasing the local radial deformation of the high-temperature and high-pressure sealing gasket and improving the performance of the self-tightening seal.

[0058] Example 3

[0059] Example 3 is a further improvement based on Example 2, such as... Figure 7 and Figure 8 As shown, the first connecting grooves 303 on two adjacent first grooves 302 are not on the same straight line, thus forming a rotary labyrinth structure with multiple first grooves 302; the second connecting grooves 403 on two adjacent second grooves 402 are no longer on the same straight line, thus forming a rotary labyrinth structure with multiple second grooves 402; after the second gasket unit 400 is fastened to the first gasket unit 300, a rotary labyrinth gas passage is formed. When high-temperature and high-pressure gas leaks out through the circumferential surface of the valve core 200, the high-temperature and high-pressure gas first... The gas is quickly injected into the gas passage near the first shaft hole 301 through the connecting hole. Since the connecting holes of the two adjacent gas passages are not on the same straight line, the high-temperature and high-pressure gas leaking out of the gas passage near the first shaft hole 301 will impact the inner wall of the gas passage, delaying the leakage of high-temperature and high-pressure gas into other gas passages adjacent to the gas passage. This allows the leakage of high-temperature and high-pressure gas to quickly fill the gas passage, thereby causing the gas passage to expand rapidly. This causes the high-temperature and high-pressure sealing gasket to quickly produce local radial deformation, quickly perform preliminary self-tightening sealing, and prevent the leakage of high-temperature and high-pressure gas.

[0060] Example 4

[0061] Example 4 is a further improvement based on Example 1, Example 2, or Example 3. The end of the first gasket unit 300 that engages with the second gasket unit 400 is a tapered protrusion, and the end of the second gasket unit 400 that engages with the first gasket unit 300 is a tapered groove. In use, after the second gasket unit 400 is engaged with the first gasket unit 300, the tapered protrusion can be inserted into the tapered groove. The second gasket unit 400 is subject to axial and radial limiting by the sealing cavity. Under the action of high-temperature and high-pressure combustion gas, an axial force is generated, causing the first gasket unit 300 to move away from the combustion chamber. This causes the second gasket unit 400 to apply a radial component force toward the axis of the first gasket unit 300, which in turn causes the first gasket unit 300 to undergo radial deformation. This causes the inner wall surface of the first shaft hole 301 to further fit and lock onto the circumferential surface of the valve core 200, thereby further improving the sealing performance.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve, wherein the high-temperature, high-pressure sealing gasket is installed in the sealing cavity of the valve body (100) of the gas valve for sealing the valve core (200) of the gas valve; characterized in that, It includes a first gasket unit (300) and a second gasket unit (400), which can be snapped together to provide a self-tightening seal for the valve core (200).

2. The high-temperature and high-pressure sealing gasket for a solid fuel engine gas valve according to claim 1, characterized in that, The first gasket unit (300) is provided with a first shaft hole (301), and the inner wall surface of the first shaft hole (301) can fit with the circumferential surface of the valve core (200).

3. The high-temperature and high-pressure sealing gasket for a solid fuel engine gas valve according to claim 2, characterized in that, The second gasket unit (400) is provided with a second shaft hole (401), and the inner wall surface of the second shaft hole (401) can fit with the circumferential surface of the valve core (200).

4. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 3, characterized in that, The first gasket unit (300) is further provided with a first groove (302) and a first connecting groove (303), the first groove (302) and the first connecting groove (303) are located on the end face of the first gasket unit (300); one end of the first connecting groove (303) is connected to the first shaft hole (301), and the other end is connected to the first groove (302).

5. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 4, characterized in that, The second gasket unit (400) is also provided with a second groove (402) and a second connecting groove (403), the second groove (402) and the second connecting groove (403) are located on the end face of the second gasket unit (400); one end of the second connecting groove (403) is connected to the second shaft hole (401), and the other end is connected to the second groove (402).

6. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 5, characterized in that, The structure of the second groove (402) is the same as that of the first groove (302); the structure of the second connecting groove (403) is the same as that of the first connecting groove (303).

7. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 6, characterized in that, The first groove (302) is annular; the second groove (402) is annular.

8. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 7, characterized in that, The first groove (302) is coaxially arranged with the first shaft hole (301), and the second groove (402) is coaxially arranged with the second shaft hole (401).

9. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 8, characterized in that, The first gasket unit (300) is also provided with a first expansion joint (304).

10. A high-temperature, high-pressure sealing gasket for a solid fuel engine gas valve according to claim 9, characterized in that, The second gasket unit (400) is also provided with a second expansion joint (404).

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