A leak-proof gas engine valve chamber cover

Abstract

This utility model discloses a leak-proof gas engine valve chamber cover, including a cover plate disposed above the gas chamber. One-way valves are evenly distributed on the top of the cover plate. A connecting plate is provided between the cover plate and the gas chamber. A sealing element is provided between the cover plate and the connecting plate. The sealing element includes a metal ring, with a rubber sleeve covering the metal ring. A pre-tightening mechanism is provided above the sealing element, comprising a bolt and a disc spring. In this utility model, by setting up a connecting plate, a liner plate, a cover plate, a sealing element, and a pre-tightening mechanism, and utilizing a disc spring, the vibration of the sealing element is reduced, improving its stability. By setting a one-way valve on the cover plate, a pressure balance channel is formed between the inner and outer sides of the cover plate, thereby achieving dynamic pressure compensation. This avoids uneven pressure at the joint surface between the cover plate and the connecting plate, prevents cover plate deformation, and thus prevents the sealing element from loosening and detaching from the mounting groove, improving the working stability of the sealing element.

Description

Technical Field

[0001] This utility model relates to the field of gas engine valve chamber technology, and in particular to a leak-proof gas engine valve chamber cover. Background Technology

[0002] Installing a valve cover on the valve chamber of a gas engine not only seals the valve chamber to isolate it from external contaminants, preventing dust and impurities from entering the valve train and avoiding oil contamination or accelerated wear of internal parts, but also prevents fuel gas, lubricating oil, and coolant from leaking from the valve chamber-cylinder interface by ensuring a tight seal between the valve cover and the cylinder block, thus maintaining internal engine pressure balance. In existing technologies, sealing rings are generally used for sealing, with bolts for external installation. However, in practical applications, internal pressure fluctuations can occur, potentially leading to uneven pressure at the interface, causing valve cover deformation, and even loosening of the sealing ring from its mounting groove. This affects the valve cover's sealing performance and is detrimental to practical applications. Therefore, we propose a leak-proof gas engine valve chamber cover. Utility Model Content

[0003] To solve the above problems, this utility model provides a leak-proof gas engine valve chamber cover.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] Design a leak-proof gas engine valve chamber cover, including a cover plate disposed above the gas chamber, one-way valves evenly distributed on the top of the cover plate, a connecting plate between the cover plate and the gas chamber, and a sealing element between the cover plate and the connecting plate. The sealing element includes a metal ring, and a rubber sleeve is fitted over the metal ring. A pre-tightening mechanism is disposed above the sealing element, and the pre-tightening mechanism includes a bolt and a disc spring.

[0006] In the above scheme, the one-way valves are respectively located at the four corners of the cover plate.

[0007] In the above scheme, an exhaust pipe is connected to the cover plate, and the one-way valve is connected to the exhaust pipe.

[0008] In the above scheme, a positioning groove is provided on the cover plate, a connecting hole is provided in the positioning groove, a positioning cylinder is fixed in the positioning groove, and a pre-tightening ring is installed at the top of the positioning cylinder.

[0009] In the above scheme, the top of the connecting plate is provided with a liner that fits against the inner wall of the cover plate, and the inner wall of the cover plate is provided with an installation groove that fits with the sealing element.

[0010] In the above scheme, the top of the cover plate is provided with an installation groove, the installation groove is provided with a threaded cylinder that mates with the bolt, the bottom of the installation groove is provided with a pressure hole that communicates with the installation groove, and the pressure hole is provided with a disc spring whose top end is connected to the bolt.

[0011] In the above scheme, the metal ring is provided with a reinforcing rib in the middle, and a support member is connected between the two sides of the reinforcing rib and the metal ring. The support member has a triangular structure, a hook is provided at one end of the opening of the metal ring, and a positioning block is provided on the outer wall of the metal ring.

[0012] The advantages and beneficial effects of this utility model are as follows: By setting a connecting plate, a liner, a cover plate, a seal, and a pre-tightening mechanism, the liner and connecting plate increase the contact area with the cover plate, improving the tightness of the connection between the cover plate and the air chamber. The seal, in conjunction with the seal, seals the connecting plate and the cover plate. Compared to existing technologies, bolts are used to press a disc spring onto the seal, using the disc spring to reduce vibration of the seal, suppress the tendency of the seal to loosen, and improve the stability of the seal. By setting a one-way valve on the cover plate, when the pressure inside the cover plate is greater than the pressure outside the cover plate, the pressure difference overcomes the closing force of the one-way valve, pushing the valve core of the one-way valve away from its seat, thereby opening the fluid channel and releasing the pressure inside the cover plate. Compared to existing technologies, the one-way valve forms a pressure balance channel between the inner and outer sides of the cover plate, achieving dynamic pressure compensation, avoiding uneven pressure on the joint surface between the cover plate and the connecting plate, preventing cover plate deformation, and thus preventing the seal from loosening and detaching from the mounting groove, improving the working stability of the seal. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of a leak-proof gas engine valve chamber cover proposed in this utility model;

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0016] Figure 3 This is a cross-sectional view of the assembly structure of the cover plate and connecting plate of the leak-proof gas engine valve chamber cover proposed in this utility model;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B;

[0018] Figure 5 This is a schematic diagram of the specific structure of the sealing element for the leak-proof gas engine valve chamber cover proposed in this utility model.

[0019] In the diagram: 1. Air chamber; 2. One-way valve; 3. Connecting plate; 4. Cover plate; 5. Liner; 6. Seal; 61. Metal ring; 62. Reinforcing rib; 63. Support; 64. Hook; 65. Rubber sleeve; 66. Positioning block; 7. Mounting groove; 8. Threaded cylinder; 9. Bolt; 10. Pressure hole; 11. Disc spring; 12. Exhaust pipe; 13. Positioning groove; 14. Positioning cylinder; 15. Pre-tightening ring; 16. Connecting hole; 17. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a leak-proof gas engine valve chamber cover, including a cover plate 4 disposed above the gas chamber 1, and a one-way valve 2 uniformly disposed on the top of the cover plate 4, wherein the opening pressure of the one-way valve 2 is set to 0.03MPa;

[0022] Furthermore, the one-way valves 2 are respectively set at the four corners of the cover plate 4 to prevent uneven pressure at the four corners of the cover plate 4, avoid excessive local pressure causing deformation of the cover plate 4, and improve the stability of the cover plate 4.

[0023] Furthermore, an exhaust pipe 13 is connected to the cover plate 4, the exhaust pipe 13 is connected to the inside of the cover plate 4, the one-way valve 2 is connected to the exhaust pipe 13, and the exhaust pipe 13 is sealed to the one-way valve 2.

[0024] Specifically, by setting a one-way valve 2 on the cover plate, when the pressure inside the cover plate 4 is greater than the pressure outside the cover plate 4, the pressure difference will overcome the closing force of the one-way valve 2, pushing the valve core of the one-way valve 2 away from its valve seat, thereby opening the fluid channel and releasing the pressure inside the cover plate 4. Compared with the prior art, by using the one-way valve 2, a pressure balance channel is formed between the inner and outer sides of the cover plate 4, thereby achieving the effect of dynamic pressure compensation, avoiding uneven pressure on the mating surface of the cover plate 4 and the connecting plate 3, preventing the cover plate 4 from deforming, and thus preventing the seal 6 from loosening and detaching from the mounting groove 7, thereby improving the working stability of the seal 6.

[0025] like Figure 1 and Figure 3As shown, a connecting plate 3 is provided between the cover plate 4 and the air chamber 1. The horizontal part of the connecting plate 3 is attached to the bottom of the cover plate 4. The connecting plate 3 is welded to the air chamber 1. A sealing element 6 is provided between the cover plate 4 and the connecting plate 3. The sealing element 6 includes a metal ring 61, and a rubber sleeve 65 is provided on the outer sleeve of the metal ring 61.

[0026] Furthermore, the metal ring 61 has a reinforcing rib 62 in the middle, and a support member 63 is connected between the reinforcing rib 62 and the metal ring 61 on both sides. The support member 63 has a triangular structure. A hook 64 is provided at one open end of the metal ring 61. A positioning block 66 is provided on the outer wall of the metal ring 61. The inner wall of the rubber sleeve 65 fits with the positioning block 66 and the hook 64 respectively. The metal ring 61, the reinforcing rib 62, the support member 63, the hook 64 and the positioning block 66 are integrally formed. The metal ring 61, the reinforcing rib 62, the support member 63, the hook 64 and the positioning block 66 are all made of stainless steel, so that the sealing element 6 has a stainless steel skeleton, which effectively improves the strength of the sealing element 6.

[0027] Furthermore, the top of the connecting plate 3 is provided with a liner 5 that fits against the inner wall of the cover plate 4, and the inner wall of the cover plate 4 is provided with an installation groove 7 that fits into the sealing element 6, so as to position and install the sealing element 7.

[0028] A pre-tightening mechanism is provided above the seal 6, which includes a bolt 10 and a disc spring 12.

[0029] Furthermore, the top of the cover plate 4 is provided with an installation groove 8, and a threaded cylinder 9 that mates with the bolt 10 is installed in the installation groove 8. The bolt 10 and the threaded cylinder 9 are threadedly connected. Below the installation groove 8, there is a pressure hole 11 that communicates with the installation groove 7. A disc spring 12 with its top end connected to the bolt 10 is installed in the pressure hole 11. The surface of the disc spring 12 is coated with a temperature compensation coating to achieve the effect of automatic compensation under high temperature conditions. By rotating the bolt 10, the bolt 10 and the threaded cylinder 9 are assembled.

[0030] Specifically, by setting up a connecting plate 3, a liner 5, a cover plate 4, a seal 6, and a pre-tightening mechanism, the liner 5 and the connecting plate 3 increase the contact area with the cover plate 4, improving the tightness of the connection between the cover plate 4 and the air chamber 1. In conjunction with the seal 6, the connecting plate 3 and the cover plate 4 are sealed. Compared with the prior art, the disc spring 12 is pressed onto the seal 6 by the bolt 10. The disc spring 12 is used to reduce the vibration of the seal 6, suppress the loosening tendency of the seal 6, and improve the stability of the seal 6.

[0031] Furthermore, the cover plate 4 has a positioning groove 14, and a connecting hole 17 is provided in the positioning groove 14. The connecting hole 17 is the same as the connecting hole disclosed in the oil-proof valve cover with announcement number CN220185241U. A positioning cylinder 15 is fixed in the positioning groove 14. A pre-tightening ring 16 is installed at the top of the positioning cylinder 15. The pre-tightening ring 16 is made of nylon to increase the friction between it and the fastener, thereby achieving a self-locking effect.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leakage-proof gas engine valve chamber cover, comprising a cover plate (4) arranged above a gas chamber (1), characterized in that One-way valves (2) are evenly provided on the top of the cover plate (4). A connecting plate (3) is provided between the cover plate (4) and the air chamber (1). A sealing element (6) is provided between the cover plate (4) and the connecting plate (3). The sealing element (6) includes a metal ring (61). A rubber sleeve (65) is provided on the outer sleeve of the metal ring (61). A pre-tightening mechanism is provided above the sealing element (6). The pre-tightening mechanism includes a bolt (10) and a disc spring (12).

2. A leak resistant gas engine valve chamber cover according to claim 1, wherein, The one-way valves (2) are respectively located at the four corners of the cover plate (4).

3. A leak resistant gas engine valve chamber cover according to claim 1, wherein, The cover plate (4) is connected to an exhaust pipe (13), and the one-way valve (2) is connected to the exhaust pipe (13).

4. A leak resistant gas engine valve chamber cover according to claim 1, wherein, The cover plate (4) has a positioning groove (14), a connecting hole (17) is provided in the positioning groove (14), a positioning cylinder (15) is fixed in the positioning groove (14), and a pre-tightening ring (16) is installed at the top of the positioning cylinder (15).

5. A leak resistant gas engine valve chamber cover according to claim 1, wherein, The top of the connecting plate (3) is provided with a liner (5) that fits against the inner wall of the cover plate (4), and the inner wall of the cover plate (4) is provided with an installation groove (7) that fits against the sealing element (6).

6. A leak-proof gas engine valve chamber cover according to claim 5, characterized in that, The top of the cover plate (4) is provided with an installation groove (8), and a threaded cylinder (9) that mates with the bolt (10) is installed in the installation groove (8). A pressure hole (11) communicating with the installation groove (7) is provided below the installation groove (8), and a disc spring (12) whose top end is connected to the bolt (10) is provided in the pressure hole (11).

7. A leak-proof gas engine valve chamber cover according to claim 1, characterized in that, The metal ring (61) is provided with a reinforcing rib (62) in the middle. Support members (63) are connected between the reinforcing rib (62) and the metal ring (61) on both sides. The support members (63) are triangular in structure. A hook (64) is provided at one end of the opening on the metal ring (61). A positioning block (66) is provided on the outer wall of the metal ring (61).

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