Sealing structure and valve

Abstract

The utility model relates to the field of sealing, in particular to a sealing structure and a valve, according to the technical scheme, the sealing structure comprises a sealing block, a through hole allowing gas to circulate is formed in the top face of the sealing block, and a first fixed sealing part is arranged on the top face of the sealing block in the circumferential direction of the sealing block; a movable sealing part is arranged on the top face of the sealing block in the circumferential direction of the through hole, the movable sealing part is located in the surrounding range of the first fixed sealing part, and a second fixed sealing part is arranged on the bottom face of the sealing block in the circumferential direction of the sealing block in a surrounding mode. The valve comprises a valve body, a valve cover arranged on the valve body and a valve rod arranged in the valve cover, a valve seat is arranged in the valve body, an inlet is formed in the valve body, an outlet is formed in the side, facing the valve rod, of the valve body, the valve rod is used for controlling the outlet to be opened and closed, and the valve further comprises the sealing structure. A mounting groove used for mounting the sealing block is formed in the side, facing the valve rod, of the valve body. The valve has the effect of improving the sealing performance of the valve.

Description

Technical Field

[0001] This application relates to the field of sealing, and in particular to a sealing structure and valve. Background Technology

[0002] With the rapid development of clean energy, fuel cell technology, as a clean and efficient power device, generates electricity through the chemical reaction of hydrogen and oxygen, with water as the only byproduct, making it energy-efficient and highly effective. As a clean technology, fuel cell technology is being applied in various fields of production and daily life.

[0003] Because hydrogen is the gas with the smallest known molecular weight, sealing issues related to hydrogen in valves and pipelines have always existed. Existing valves have inlets on the valve body for gas entry, and the opening and closing of the outlet on the valve body is controlled by moving the valve core up and down. However, leakage occurs when hydrogen flows to the contact area between the valve core and the valve body. To improve the sealing performance of valves used with hydrogen, this application provides a sealing structure and a valve. Utility Model Content

[0004] To improve the valve, this application provides a sealing structure and a valve.

[0005] On the one hand, the sealing structure provided in this application adopts the following technical solution:

[0006] A sealing structure includes a sealing block, a through hole on the top surface of the sealing block, a fixed sealing part one surrounding the top surface of the sealing block along the circumference of the sealing block, a movable sealing part surrounding the top surface of the sealing block along the circumference of the through hole, the movable sealing part being located within the enclosure of the fixed sealing part one, and a fixed sealing part two surrounding the bottom surface of the sealing block along the circumference of the sealing block.

[0007] By adopting the above technical solution, the through hole on the sealing block facilitates the installation of the sealing block, the fixed sealing part one and the movable sealing part improve the sealing effect of the sealing block, and at the same time increase the contact area of ​​the top surface of the sealing block, the fixed sealing part two improves the sealing effect of the bottom of the sealing block, and increases the compression area of ​​the bottom surface of the sealing block.

[0008] Preferably, the top surface of the fixed sealing part one is lower than the top surface of the movable sealing part, and the bottom surface of the fixed sealing part two is lower than the bottom surface of the movable sealing part.

[0009] By adopting the above technical solution, there is a height difference between the fixed sealing part one and the movable sealing part, which provides space for the movable sealing part to be squeezed and deformed; there is a height difference between the fixed sealing part two and the bottom surface of the sealing block, which provides deformation space for the deformation of the fixed sealing part two.

[0010] Preferably, the top surface of the first fixing sealing part is arc-shaped or horizontal, and the bottom surface of the second fixing sealing part is arc-shaped or horizontal.

[0011] By adopting the above technical solution, the arc surface facilitates the compression deformation of the fixed sealing part one or the fixed sealing part two, reduces the impact of the object to be sealed on the sealing block, and extends the service life of the sealing block; the horizontal surface facilitates the contact of the fixed sealing part one or the fixed sealing part two with the object to be sealed, and improves the fit between the two.

[0012] Preferably, the contact surface of the movable sealing part is arc-shaped.

[0013] Preferably, the contact surface of the movable sealing part is horizontal.

[0014] On the other hand, the valve provided in this application adopts the following technical solution:

[0015] A valve includes a valve body, a valve stem, and a valve seat. The valve body has an inlet and an outlet. The valve stem controls the opening and closing of the outlet. The valve body also includes a sealing structure as described above. The valve body has a mounting groove on the side facing the valve stem for receiving at least part of the sealing structure. The valve seat is in compression contact with a fixed sealing part on the side facing the sealing structure. When the valve stem is pressed down to seal the outlet, the side of the valve stem facing the sealing structure is in compression contact with a movable sealing part.

[0016] By adopting the above technical solution, the sealing structure effectively improves the sealing performance of the valve. When the valve is installed, the valve cover is installed into the valve body, thereby pressing the valve seat. When the valve seat is pressed down, it presses the fixed sealing part one. When the valve stem is pressed down to close the outlet, the valve stem is pressed down, and the valve stem squeezes and presses tightly against the movable sealing part, so as to achieve the sealing effect.

[0017] Preferably, it also includes a valve cover, and a sealing ring is provided between the valve body and the valve cover.

[0018] By adopting the above technical solution, the sealing ring improves the sealing performance between the valve cover and the valve body.

[0019] Preferably, a second sealing ring is provided between the valve cover and the valve stem.

[0020] By adopting the above technical solution, the sealing ring II improves the sealing effect between the valve stem and the valve cover.

[0021] In summary, the sealing structure improves the valve's sealing performance. Fixed sealing part one, fixed sealing part two, and movable sealing part increase the service life of the sealing block. Fixed sealing part one improves the sealing performance between the valve body and the valve seat, fixed sealing part two improves the sealing performance between the sealing block and the valve body, and movable sealing part improves the sealing performance between the valve stem and the valve body. The sealing structure effectively improves the sealing performance at the valve outlet position and effectively prevents hydrogen leakage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a sealing structure according to this application. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of a sealing structure according to this application. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of a sealing structure according to this application. Figure 3 ;

[0025] Figure 4 This is a schematic diagram of a sealing structure according to this application. Figure 4 ;

[0026] Figure 5 This is a structural schematic diagram of a valve according to this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Sealing block; 2. Through hole; 3. Fixed sealing part one; 4. Movable sealing part; 5. Fixed sealing part two; 6. Valve body; 7. Valve cover; 8. Valve stem; 9. Valve seat; 10. Inlet; 11. Outlet; 12. Mounting groove; 13. Sealing ring one; 14. Sealing ring two. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-Figure 5 The present invention will be further described below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and should not be used to limit the protection scope of the present invention.

[0029] In the description of this application, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Example 1:

[0031] This application discloses a sealing structure. (Refer to...) Figure 1The system includes a sealing block 1, with a through hole 2 on its top surface for easy installation. A fixed sealing portion 3 is provided around the top surface of the sealing block 1, increasing the contact area and improving its sealing effect. A movable sealing portion 4, located within the area enclosed by the fixed sealing portion 3, is provided around the top surface of the sealing block 1 along the through hole 2, further increasing the contact area. A second fixed sealing portion 5 is provided around the bottom surface of the sealing block 1, improving the sealing effect at the bottom. In this embodiment, the sealing block 1, the fixed sealing portion 3, the second fixed sealing portion 5, and the movable sealing portion 4 are integrally formed, improving the overall stability of the sealing structure.

[0032] Reference Figure 1 The contact surface of the fixed sealing part 3 is arc-shaped. This arc-shaped surface improves the fit of the fixed sealing part 3 and enhances the sealing effect of the sealing block 1. It also effectively reduces the impact on the sealing block 1, extending its service life. Similarly, the contact surface of the fixed sealing part 5 is arc-shaped, improving its fit and enhancing the sealing effect of the sealing block 1. This also effectively reduces the impact on the sealing block 1, extending its service life. The contact surface of the movable sealing part 4 is arc-shaped, improving its service life and enhancing the sealing effect of the sealing block 1.

[0033] Reference Figure 1 The top surface of the fixed sealing part 3 is lower than the top surface of the movable sealing part 4, creating a height difference between them. This provides deformation space for both parts, improving the sealing effect of the sealing block 1. Similarly, the bottom surface of the fixed sealing part 5 is lower than the bottom surface of the sealing block 1, also creating a height difference. This provides deformation space for the fixed sealing part 5, further enhancing the sealing effect of the sealing block 1.

[0034] Example 2:

[0035] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 2 The contact surfaces of the fixed sealing part 1 3 and the fixed sealing part 2 5 are horizontal, which improves the fit of the sealing block 1.

[0036] Example 3:

[0037] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 3The contact surface of the fixed sealing part 3 is horizontal, the contact surface of the fixed sealing part 5 is horizontal, and the corners of the fixed sealing part 3 and the fixed sealing part 5 are rounded; the contact surface of the movable sealing part 4 is horizontal, and a deformation gap is formed between the movable sealing part 4 and the fixed sealing part 3, so that the movable sealing part 4 and the fixed sealing part 3 can contact the item to be sealed respectively, thereby improving the sealing effect of the sealing block 1.

[0038] Example 4:

[0039] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 4 The contact surface of the movable sealing part 4 is horizontal, and the corners of the movable sealing part 4 are rounded. The horizontal contact surface of the movable sealing part 4 facilitates its fit to the object to be sealed and improves the contact and support stability of the sealing block 1.

[0040] Example 5

[0041] This application discloses a valve. (Refer to...) Figure 5 The valve body includes a valve body 6, a valve cover 7 mounted on the valve body 6 and connected to the valve body 6 at one end, a valve stem 8 mounted inside the valve cover 7, a valve seat 9 mounted inside the valve body 6, and any of the aforementioned sealing structures mounted inside the valve body 6. The valve stem 8 is located within the space enclosed by the valve seat 9. The valve body 6 has an inlet 10 and an outlet 11 on the side of the valve body 6 facing the valve stem 8. The valve stem 8 is used to control the opening and closing of the outlet 11.

[0042] Reference Figure 5 The valve body 6 has a mounting groove 12 for installing a sealing structure on the side facing the valve stem 8. The fixed sealing part 3 faces the valve seat 9, and the movable sealing part 4 faces the valve stem 8. A sealing ring 13 is fitted on the valve cover 7 between the valve body 6 and the valve cover 7, and a sealing ring 14 is fitted on the valve stem 8 between the valve cover 7 and the valve stem 8. The sealing rings 13 and 14 improve the valve's sealing performance and reduce the possibility of leakage of the medium inside the valve.

[0043] Reference Figure 5 In this embodiment, the outer wall of the valve cover 7 is provided with an external thread, and the inner wall of the valve body 6 is provided with an internal thread that matches the external thread. The valve cover 7 is screwed into the valve body 6 through the threaded engagement, thereby pressing the valve seat 9. The valve seat 9 then presses the fixed sealing part 3 until it contacts the end face of the valve body 6. A sealing compression is generated between the valve seat 9 and the fixed sealing part 3, forming a sealing effect. At the same time, after the valve seat 9 is pressed, it contacts the end face of the valve body 6, effectively preventing excessive compression of the fixed sealing part 3 and improving the service life of the sealing block 1. The valve stem 8 is screwed into the valve cover 7 through the threaded engagement. When the valve stem 8 moves downward to the end face of the valve body 6, the valve stem 8 contacts and compresses the movable sealing part 4, forming a sealing effect and effectively improving the valve's sealing performance.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sealing structure, characterized in that: The sealing block (1) includes a sealing block (1), a through hole (2) on the top surface of the sealing block (1), a fixed sealing part (3) is provided around the top surface of the sealing block (1) in the circumferential direction, a movable sealing part (4) is provided around the top surface of the sealing block (1) in the circumferential direction of the through hole (2), the movable sealing part (4) is located within the enclosure of the fixed sealing part (3), and a fixed sealing part (5) is provided around the bottom surface of the sealing block (1) in the circumferential direction of the sealing block (1).

2. The sealing structure according to claim 1, characterized in that: The top surface of the fixed sealing part (3) is lower than the top surface of the movable sealing part (4), and the bottom surface of the fixed sealing part (5) is lower than the bottom surface of the movable sealing part (4).

3. The sealing structure according to claim 1, characterized in that: The top surface of the first fixed sealing part (3) is arc-shaped or horizontal, and the bottom surface of the second fixed sealing part (5) is arc-shaped or horizontal.

4. A sealing structure according to claim 3, characterized in that: The contact surface of the movable sealing part (4) is arc-shaped.

5. A sealing structure according to claim 3, characterized in that: The contact surface of the movable sealing part (4) is horizontal.

6. A valve, comprising a valve body (6), a valve stem (8), and a valve seat (9), wherein the valve body (6) has an inlet (10) and an outlet (11), and the valve stem (8) is used to control the opening and closing of the outlet (11), characterized in that: It also includes the sealing structure described in any one of claims 1-5 above, wherein the valve body (6) has an installation groove (12) for accommodating at least part of the sealing structure on the side facing the valve stem (8), the valve seat (9) is in pressure contact with the fixed sealing part (3) on the side facing the sealing structure, and when the valve stem (8) presses down to seal the outlet (11), the side facing the valve stem (8) is in pressure contact with the movable sealing part (4).

7. A valve according to claim 6, characterized in that: It also includes a valve cover, and a sealing ring (13) is provided between the valve body (6) and the valve cover (7).

8. A valve according to claim 7, characterized in that: A sealing ring 2 (14) is provided between the valve cover (7) and the valve stem (8).

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