Sealing element of multi-stage sealing structure

Abstract

The utility model discloses a sealing element of a multistage sealing structure, and particularly relates to a sealing element which comprises a base ring and a first contact edge arranged on the inner side of the base ring, auxiliary rings are symmetrically arranged on the inner side of the base ring, a second contact edge and a third contact edge are arranged on the inner sides of the auxiliary rings, and the side edges of the second contact edge and the third contact edge are respectively adjacent and attached. According to the sealing element of the multi-stage sealing structure, the two auxiliary rings are symmetrically arranged on the base ring, and when the sealing element is used, the second contact edges, the third contact edges and the first contact edges on the two auxiliary rings form five contact stages, namely five sealing areas; therefore, the installation space is reduced through compact assembly between the auxiliary rings and the base ring, a good sealing effect can be achieved through the multiple sealing areas, through independent arrangement between the auxiliary rings and the base ring, when the single auxiliary ring is pulled and extruded, the single auxiliary ring can slightly move on the base ring, and the sealing effect is good. And the pulling force on the auxiliary ring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seals, and particularly to a seal with a multi-stage sealing structure. Background Art

[0002] Seals are mainly used to prevent leakage of liquids and gases and ensure the normal operation of equipment. Common seals include rubber sealing rings, gaskets, etc. These seals play an important role in different application scenarios to ensure the safety and efficiency of equipment.

[0003] According to the patent publication number CN208397282U, the publication (announcement) date: January 18, 2019, a seal is disclosed, which includes a body with a central hole. There are two annular inner sealing rings on the inner wall of the central hole. The cross-section of the annular inner sealing ring is semicircular, and the two annular inner sealing rings are respectively arranged at 1 / 3 and 2 / 3 of the central hole. There is an annular outer sealing ring in the middle position of the outer side wall of the body, and the width of the annular outer sealing ring is the same as the width of the gap between the two annular inner sealing rings. There are two annular upper protrusions on the upper surface of the body, and there is one annular lower protrusion on the lower surface of the body. The diameter of the circle formed by the annular lower protrusion is equal to the diameter of the circle formed by the gap between the two annular upper protrusions.

[0004] Including the seal in the above patent, currently common seals are mostly simple annular rings. Through the elasticity of the seal itself and the annular structure, when fixedly installed, it can fit on the rod body that moves in the middle, thus achieving a good sealing effect. And because of the simple structure of this kind of annular ring, it is easy to produce and manufacture. However, because there is only one sealing contact point when this kind of simple seal is in use, multiple seals are set to achieve a better sealing effect when in use. However, when multiple such simple seals are used together, the distance between them is relatively far, so it will occupy more space for use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a seal with a multi-stage sealing structure, which makes the structure of the seal more compact and sets multiple stages to achieve a better sealing effect and reduce the installation space.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A seal with a multi-stage sealing structure includes a base ring and a first contact edge arranged on its inner side. Auxiliary rings are symmetrically arranged on the inner side of the base ring, and a second contact edge and a third contact edge are arranged on the inner side of the auxiliary rings. The sides of the second contact edge and the third contact edge are adjacent and fit together respectively.

[0007] Preferably, the inner side walls of the first contact edge, the second contact edge and the third contact edge are respectively curved surfaces.

[0008] Preferably, clamping petals that turn inwards and close towards the inside of the base ring are symmetrically arranged at the top and bottom of the base ring, and the raised edges provided on the auxiliary ring are embedded in the gap between the clamping petals and the base ring.

[0009] Preferably, embedding parts that fit on the auxiliary ring are respectively arranged on the outer walls on both sides of the first contact edge, and a compression cavity part is arranged inside the first contact edge.

[0010] Preferably, a receiving cavity is arranged between the second contact edge and the third contact edge.

[0011] Preferably, the second contact edge and the third contact edge are respectively polyurethane sealing rings.

[0012] Preferably,

[0013] In the above technical solution, a sealing member with a multi-stage sealing structure provided by the present utility model has the following beneficial effects: by symmetrically arranging two auxiliary rings on the base ring, and the second contact edge and the third contact edge are arranged on the auxiliary ring, so when in use, five contact levels, that is, five sealing areas, are formed by the second contact edge, the third contact edge and the first contact edge on the two auxiliary rings, thereby using the compact assembly between the auxiliary ring and the base ring to reduce the installation space, and multiple sealing areas can also achieve a good sealing effect. Through the independent setting between the auxiliary ring and the base ring, when a single auxiliary ring is pulled and squeezed, it can move slightly on the base ring, thereby reducing the pulling force on the auxiliary ring. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall sectional structure provided by the embodiment of the present utility model.

[0016] Description of the Reference Numerals:

[0017] 1. Base ring; 2. Auxiliary ring; 3. Curved surface; 11. Clamping petal; 12. Compression cavity part; 13. Embedding part; 14. First contact edge; 21. Second contact edge; 22. Third contact edge; 23. Receiving cavity; 24. Raised edge. Detailed Embodiment

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0019] like Figure 1 As shown, a sealing member with a multi-stage sealing structure includes a base ring 1 and a first contact edge 14 arranged on the inner side thereof, an auxiliary ring 2 is symmetrically arranged on the inner side of the base ring 1, and a second contact edge 21 and a third contact edge 22 are arranged on the inner side of the auxiliary ring 2, and the side edges of the second contact edge 21 and the third contact edge 22 are adjacent and in contact with each other. Two auxiliary rings 2 are symmetrically arranged on the base ring 1, and the second contact edge 21 and the third contact edge 22 are arranged on the auxiliary ring 2. Therefore, when in use, the second contact edges 21 and the third contact edges 22 on the two auxiliary rings 2 and the first contact edge 14 form five contact levels, i.e., five sealing areas, so that the compact assembly between the auxiliary ring 2 and the base ring 1 is utilized to reduce the installation space, and the multiple sealing areas can also play a good sealing effect. Through the independent arrangement between the auxiliary ring 2 and the base ring 1, when a single auxiliary ring 2 is pulled and squeezed, it can move slightly on the base ring 1, thereby reducing the pulling force on the auxiliary ring 2.

[0020] Furthermore, since the second contact edge 21 and the third contact edge 22 are assembled in a close-fitting manner, when a single second contact edge 21 or the third contact edge 22 is subjected to friction and pulling, the single second contact edge 21 or the third contact edge 22 can move and deform to a certain extent, and the influence between them is reduced, so that the second contact edge 21 or the third contact edge 22 can better withstand the extrusion force and pulling force.

[0021] As a further technical solution provided by the present invention, the inner side walls of the first contact edge 14 , the second contact edge 21 and the third contact edge 22 are respectively curved surfaces 3 .

[0022] Specifically, Figure 1 As shown, by using the inner side walls of the first contact edge 14, the second contact edge 21 and the third contact edge 22 to set the bottom end curved surface 3, when the single first contact edge 14, the second contact edge 21 or the third contact edge 22 is slightly flipped by being toggled, the first contact edge 14, the second contact edge 21 and the third contact edge 22 can be stably attached to the outer wall of the rod body to be sealed by using the elasticity of the curved surface 3 and the first contact edge 14, the second contact edge 21 and the third contact edge 22. Thus, the stability of the seal is improved.

[0023] Furthermore, the top and bottom of the base ring 1 are symmetrically provided with clips 11 that are turned and closed toward the inside of the base ring 1 , and the raised edge 24 provided on the auxiliary ring 2 is embedded in the gap between the clips 11 and the base ring 1 .

[0024] Specifically, the clamping petals 11 and the auxiliary rings 2 are symmetrically arranged on the base ring 1, so that the forces on the two auxiliary rings 2 and the base ring 1 are more evenly distributed. Secondly, the raised edges 24 provided on the auxiliary rings 2 are embedded into the gaps between the clamping petals 11 and the base ring 1, so as to limit the auxiliary rings 2 on the base ring 1 by means of the clamping petals 11 and the first contact edges 14.

[0025] Furthermore, embedding parts 13 that fit on the auxiliary rings 2 are respectively provided on the outer walls on the opposite sides of the first contact edge 14, and a compression cavity part 12 is arranged inside the first contact edge 14.

[0026] Specifically, the embedding parts 13 are used to squeeze the auxiliary rings 2 and have a certain limiting effect on the auxiliary rings 2. Secondly, as Figure 1 shown, when the third contact edge 22 is subjected to a squeezing force, at this time, the third contact edge 22 will squeeze on the embedding part 13, and then squeeze the compression cavity part 12 by squeezing the embedding part 13, so as to buffer the squeezing force received by the third contact edge 22 by means of the compression and deformation of the compression cavity part 12.

[0027] Moreover, a receiving cavity 23 is arranged between the second contact edge 21 and the third contact edge 22.

[0028] Specifically, through the receiving cavity 23 arranged between the second contact edge 21 and the third contact edge 22, when the second contact edge 21 and the third contact edge 22 are squeezed, at this time, the adjacent side edges of the second contact edge 21 and the third contact edge 22 are mutually attached, and the receiving cavity 23 is compressed by the deformation of the second contact edge 21 and the third contact edge 22, so as to buffer the second contact edge 21 and the third contact edge 22 by means of the air compression in the receiving cavity 23. Secondly, the mutual attachment between the second contact edge 21 and the third contact edge 22 can realize the support and elastic buffering between them. Thus, while the second contact edge 21, the third contact edge 22 and the first contact edge 14 are sealed, their independent mobility and the cooperation between them can also be improved.

[0029] Further, the second contact edge 21 and the third contact edge 22 are respectively polyurethane sealing rings.

[0030] Specifically, the polyurethane sealing rings have good wear resistance and abrasion resistance.

[0031] Working principle: Two auxiliary rings 2 are symmetrically arranged on the base ring 1, and a second contact edge 21 and a third contact edge 22 are arranged on the auxiliary ring 2. Therefore, during use, the second contact edge 21, the third contact edge 22 and the first contact edge 14 on the two auxiliary rings 2 are used to form five contact levels, namely five sealing areas, so as to utilize the compact assembly between the auxiliary ring 2 and the base ring 1 to reduce the installation space, and multiple sealing areas can also achieve a good sealing effect. Through the independent setting between the auxiliary ring 2 and the base ring 1, when a single auxiliary ring 2 is pulled and squeezed, it can move slightly on the base ring 1, thereby reducing the pulling force on the auxiliary ring 2.

[0032] Only some exemplary embodiments of the present invention have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A seal for a multi-stage sealing structure, characterized in that, It includes a base ring (1) and a first contact edge (14) provided on its inner side. Auxiliary rings (2) are symmetrically arranged inside the base ring (1), and a second contact edge (21) and a third contact edge (22) are provided inside the auxiliary rings (2). The sides of the second contact edge (21) and the third contact edge (22) are adjacent and fit together respectively.

2. The seal of a multi-stage sealing structure according to claim 1, characterized in that, The inner side walls of the first contact edge (14), the second contact edge (21), and the third contact edge (22) are respectively curved surfaces (3).

3. The seal of a multi-stage sealing structure according to claim 1, characterized in that, Clamping petals (11) that flip and close inwardly towards the inside of the base ring (1) are symmetrically arranged at the top and bottom of the base ring (1). A raised edge (24) provided on the auxiliary ring (2) is embedded in the gap between the clamping petals (11) and the base ring (1).

4. The seal of a multi-stage sealing structure according to claim 1, characterized in that, Embedding portions (13) that fit on the auxiliary ring (2) are respectively provided on the outer walls of opposite sides of the first contact edge (14). A compression cavity portion (12) is provided inside the first contact edge (14).

5. The seal of a multi-stage seal structure according to claim 1, characterized in that, A receiving cavity (23) is provided between the second contact edge (21) and the third contact edge (22).

6. The seal of a multi - stage sealing structure according to claim 1, characterized in that, The second contact edge (21) and the third contact edge (22) are respectively polyurethane sealing rings.

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