A large-gap compensation sealing structure

Abstract

The present invention relates to a large-gap compensation sealing structure, belonging to the technical field of mechanical seals. It includes a groove formed in a first plate body, and a sealing structure is arranged in the groove. The sealing structure includes a sealing strip slidably connected in the groove, and the sealing strip is integrally arranged as an elastic strip with elasticity. The sealing structure further includes a first elastic member located between the bottom wall of the groove and the sealing strip. The first elastic member is used to drive the sealing strip to always abut against the second plate body when the first plate body and the second plate body move relative to each other. When the position of the second plate body is fixed and the first plate body moves towards or away from the second plate body, the sealing strip can always resist the elastic force of the first elastic member and abut against the second plate body, thereby ensuring the sealing effect between the first plate body and the second plate body. It is applicable to the situation where a large gap appears during the relative movement of the first plate body and the second plate body, and improves the sealing effect between the first component and the second component under different conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical seals, and in particular to a large-gap compensation seal structure. Background Art

[0002] Sealing can be divided into two categories: static sealing and dynamic sealing. Sealing is a component or measure to prevent fluid or solid particles from leaking between adjacent mating surfaces and to prevent external impurities such as dust and moisture from entering the interior of machinery and equipment.

[0003] As Figure 3 shown, when sealing between two relatively moving first and second components, when the first and second components are respectively set as the first plate body 1 and the second plate body 2, the above relative movement has the following situations: ① When the first plate body 1 and the second plate body 2 are in a perpendicular state, the position of the first plate body 1 is fixed, and the second plate body 2 moves on the first plate body 1; ② When the first plate body 1 and the second plate body 2 are perpendicular to each other, the position of the first plate body 1 is fixed, and the second plate body 2 moves in a direction approaching or away from the first plate body 1; ③ When the first plate body 1 and the second plate body 2 are in the same plane, there is a horizontal or vertical misalignment between the edges of the first plate body 1 and the second plate body 2 that are approaching each other; ④ When the position of the first plate body 1 is fixed, the edge of the second plate body 2 close to the first plate body 1 moves in a circular arc on the first plate body 1; ⑤ When the position of the first plate body 1 is fixed, the edge of the second plate body 2 close to the first plate body 1 moves irregularly on the first plate body 1, for example, the edge of the second plate body 2 close to the first plate body 1 moves in an S-shaped path or other situations; the above relative movement situations include but are not limited to the above several, and the above first and second components can be set as rods, plates with irregular shapes or other objects. In order to ensure the sealing performance between the first plate body 1 and the second plate body 2, a rubber strip 21 is usually provided at the edge of the second plate body 2 close to the first plate body 1. Similarly, in order to ensure the sealing performance between the first and second components of different objects, the rubber strip 21 is also used.

[0004] The above prior art solutions have the following defects: Although relying on the elasticity of the rubber strip 21 can ensure the sealing effect between the first plate body 1 and the second plate body 2 to a certain extent, when the gap between the first plate body 1 and the second plate body 2 is relatively large after relative movement, relying solely on the elasticity of the rubber strip 21 still cannot ensure the sealing performance between the first plate body 1 and the second plate body 2, reducing the sealing effect between the first and second components in different situations. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a large-gap compensation seal structure with high applicability.

[0006] The above object of the present invention is achieved by the following technical solutions:

[0007] A large-gap compensation sealing structure includes a groove formed in a first plate body. The groove is located on the surface of the first plate body facing the second plate body and is arranged towards the inside of the first plate body. A sealing structure is arranged in the groove for ensuring the sealing performance between the first plate body and the second plate body when they move relative to each other. The sealing structure includes a sealing strip slidably connected in the groove. The sealing strip is integrally arranged as an elastic strip with elasticity. The sealing structure further includes a first elastic member located between the bottom wall of the groove and the sealing strip. The first elastic member is used to drive the sealing strip to always abut against the second plate body when the first plate body and the second plate body move relative to each other.

[0008] By adopting the above technical solutions, when the position of the second plate body is fixed and the first plate body moves towards or away from the second plate body, the sealing strip, under the elastic force of the first elastic member, always clings to the second plate body against the first spring member, thus ensuring the sealing effect between the first plate body and the second plate body. It is applicable to the situation where a large gap appears during the relative movement of the first plate body and the second plate body, and improves the sealing effect between the first component and the second component under different conditions.

[0009] In a preferred example of the present invention, it can be further configured that: the first elastic member includes a first spring sheet located between the bottom wall of the groove and the edge of the sealing strip away from the second plate body. The first spring sheet is arranged along the length direction of the groove, and the first spring sheet is integrally arranged in a corrugated shape.

[0010] By adopting the above technical solutions, when relative movement occurs between the first plate body and the second plate body, the second plate body can drive the sealing strip in the groove to squeeze the first spring sheet, causing the corrugated first spring sheet to deform, so that the sealing strip resists the elastic force of the first spring sheet and always maintains an abutting relationship with the second plate body, thereby ensuring the sealing performance between the first plate body and the second plate body under a large gap. The use of the first spring sheet has a simple structure, is convenient for installation, and improves the abutting effect of abutting the sealing strip against the second plate body.

[0011] In a preferred example of the present invention, it can be further configured that: a plurality of first spring sheets are provided. Each first spring sheet is arranged along the length direction of the groove, and the notches of adjacent corrugated spring sheets are arranged oppositely.

[0012] By adopting the above technical solution, multiple corrugated spring pieces are used, which can enable the sealing strip to have a greater stroke in the groove body, so that the sealing structure is further applicable to the first plate body and the second plate body with a larger gap after relative movement. And when multiple first spring pieces are in a compressed state, the abutting force of the sealing strip against the second plate body increases, improving the sealing effect between the first plate body and the second plate body; the notches of adjacent corrugated first spring pieces are arranged oppositely, so that there is an effect of mutual extrusion between adjacent first spring pieces. When multiple first spring pieces are in a compressed state, the abutting force between the sealing strip and the second plate body is further increased, thereby further improving the sealing effect between the sealing strip and the second plate body.

[0013] In a preferred example, the present invention can be further configured as: a receiving groove is formed on the surface of the sealing strip away from the second plate body and opens towards the inside of the sealing strip. The receiving groove is arranged along the length direction of the sealing strip, and a second elastic member for driving the sealing strip to abut tightly against the side wall of the groove body is arranged in the receiving groove.

[0014] By adopting the above technical solution, the sealing strip abuts against the side wall of the groove body under the elastic force of the second spring member, thereby improving the sealing performance between the sealing strip and the groove body, preventing gas or other impurities from passing through the gap between the sealing strip and the groove body after the first plate body and the second plate body are sealed by the sealing strip, and further improving the sealing effect of the entire sealing structure for the first plate body and the second plate body.

[0015] In a preferred example, the present invention can be further configured as: the cross section of the receiving groove is arranged in a "U" shape. The second elastic member includes a second spring piece located in the receiving groove and arranged along the length direction of the receiving groove. The second spring piece is arranged in mutual cooperation with the "U"-shaped receiving groove, and the notch of the "U"-shaped second spring piece is arranged towards the position where the bottom wall of the groove body is located.

[0016] By adopting the above technical solution, when the "U"-shaped second spring piece is placed in the receiving groove, the "U"-shaped second spring piece can squeeze the sealing strip to move towards the side wall of the groove body, so that the sealing strip abuts against the side wall of the groove body against the elastic force of the "U"-shaped second spring piece, thereby improving the sealing effect between the sealing strip and the side wall of the groove body. The structure of the second spring piece is simple and convenient for installation, improving the sealing effect between the sealing strip and the groove body.

[0017] In a preferred example, the present invention can be further configured as: a plurality of strip-shaped openings are formed in the second spring piece along the length direction of the second spring piece.

[0018] By adopting the above technical solution, the setting of the strip opening can make the entire second spring sheet have better elasticity, thereby further improving the abutment effect of the sealing strip against the side wall of the groove body against the elastic force of the spring, and further improving the sealing effect between the sealing strip and the groove body.

[0019] In a preferred example, the present invention can be further configured as follows: protrusions are provided on the two surfaces of the sealing strip facing the side walls of the groove body and located relative to the position of the accommodating groove, the protrusions are provided on the sealing strip along the length direction of the accommodating groove, and the protrusions are integrally provided with the sealing strip.

[0020] By adopting the above technical solution, when the sealing strip with the protrusion is placed in the groove body, the sealing strip makes the protrusion close to the side wall of the sealing groove under the elastic force of the second spring sheet, thereby further improving the sealing effect between the sealing strip and the side wall of the groove body.

[0021] In a preferred example, the present invention can be further configured as follows: the large gap compensation sealing structure also includes a limiting member for preventing the sealing strip from being separated from the groove body.

[0022] By adopting the above technical solution, the setting of the limiter can prevent the sealing strip from falling out when resisting the elastic force of the first spring sheet, thereby preventing the sealing strip from falling out of the groove body when the first plate body and the second plate body are using the sealing structure, thereby improving the use effect of the sealing structure.

[0023] In a preferred example, the present invention can be further configured as follows: the limiting member includes a plurality of bolts that are passed through and threadedly connected to the first plate body, the plurality of bolts are evenly arranged along the length direction of the groove body, and a limiting groove for allowing the rod body of the bolt to move into the end is opened on the sealing strip along the length direction of the sealing strip.

[0024] By adopting the above technical scheme, when the sealing strip moves in the groove body against the elastic force of the first spring sheet, the end rod portion of the bolt is located in the limiting groove to limit the moving distance of the sealing strip; when the gap after the relative movement of the first plate body and the second plate body is larger, the end portion of the bolt is located at the position of the limiting groove away from the second plate body, which limits the continued movement of the sealing strip; when the gap after the relative movement of the first plate body and the second plate body is smaller, the end portion of the bolt is located at the position of the limiting groove close to the second plate body, which also limits the continued movement of the sealing strip, thereby preventing the sealing strip from detaching from the groove body; the arrangement of the bolt and the limiting groove has a simple structure and a better limiting effect on the sealing strip.

[0025] In a preferred example, the present invention can be further configured as follows: a groove is provided on the surface of the sealing strip facing away from the limiting groove along the length direction of the sealing strip, and the groove is arranged opposite to the limiting groove.

[0026] By adopting the above technical solution, the grooves and the limiting grooves reduce the thickness of the sealing strip, thereby improving the elasticity of the elastomer between the receiving grooves and the limiting grooves and between the receiving grooves and the grooves. When the sealing strip with protrusions is moved into the groove body, the groove body can better squeeze the protrusions to drive the second spring piece to be squeezed into a compressed state, thereby further improving the abutting effect between the protrusions and the side wall of the groove body.

[0027] In summary, the present invention includes at least one of the following beneficial technical effects:

[0028] 1. When relative displacement occurs between the first plate body and the second plate body, the sealing strip always maintains an abutting state with the second plate body under the elastic force of the first spring piece, which is applicable to the case where a large gap appears during the relative movement of the first plate body and the second plate body, and improves the sealing effect between the first component and the second component in different situations;

[0029] 2. Under the elastic force of the second spring piece, the protrusions of the sealing strip always abut against the side wall of the groove body, thereby improving the sealing effect between the sealing strip and the groove body, preventing gas or other impurities from passing through the gap between the sealing strip and the groove body after the first plate body and the second plate body are sealed, and further improving the sealing effect of the sealing structure on the first plate body and the second plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic structural diagram of the whole embodiment of the present invention;

[0031] Figure 2 It is an exploded structural diagram for showing the first spring piece and the second spring piece;

[0032] Figure 3 It is a schematic structural diagram of the prior art.

[0033] In the figure, 1, the first plate body; 11, the groove body; 12, the sealing strip; 121, the first spring piece; 122, the receiving groove; 123, the second spring piece; 124, the strip-shaped opening; 125, the protrusion; 13, the bolt; 131, the limiting groove; 14, the groove; 2, the second plate body; 21, the rubber strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Referring to Figure 1 , a large-gap compensation sealing structure disclosed by the present invention includes a groove body 11 opened on the first plate body 1. The groove body 11 is located on the surface of the first plate body 1 facing the second plate body 2 and is arranged towards the inside of the first plate body 1.

[0036] Combined with Figure 1 and Figure 2, a sealing structure for ensuring the sealing between the first plate body 1 and the second plate body 2 when the first plate body 1 and the second plate body 2 move relative to each other is provided inside the tank body 11.

[0037] Combined with Figure 1 and Figure 2 , the sealing structure includes a sealing strip 12 slidably connected inside the tank body 11. The sealing strip 12 is integrally provided as an elastic strip with elasticity. In this embodiment, the sealing strip 12 is made of polytetrafluoroethylene material. And in order to improve the abutting effect after the relative movement of the first plate body 1 and the second plate body 2, the edge of the sealing strip 12 close to the second plate body 2 is arranged in an arc shape. In other embodiments, a sealing strip 12 made of rubber material can also be used for replacement, which can also achieve the sealing effect.

[0038] Combined with Figure 1 and Figure 2 , the sealing structure further includes a first elastic member located between the bottom wall of the tank body 11 and the sealing strip 12. The first elastic member is used to drive the sealing strip 12 to always abut against the second plate body 2 when the first plate body 1 and the second plate body 2 move relative to each other; In this embodiment, the first elastic member includes a first spring piece 121 located between the bottom wall of the tank body 11 and the edge of the sealing strip 12 away from the second plate body 2, and the first spring piece 121 is arranged along the length direction of the tank body 11.

[0039] When the first spring piece 121 is in a compressed state, the sealing strip 12 can resist the elastic force of the first spring piece 121 and always abut against the second plate body 2. Thus, when the first plate body 1 and the second plate body 2 move relative to each other, the sealing strip 12 can always maintain the sealing effect between the first plate body 1 and the second plate body 2. The sealing strip 12 can move inside the tank body 11 relying on the first spring piece 121, so that the sealing strip 12 can be applicable to the situation where a large gap appears in the relative movement of the first plate body 1 and the second plate body 2, ensuring the sealing effect between the first component and the second component in different situations.

[0040] In other embodiments, the first elastic member can be replaced with a plurality of helical springs fixedly arranged between the bottom wall of the tank body 11 and the sealing strip 12. The two ends of the helical spring are respectively fixedly connected to the bottom wall of the tank body 11 and the sealing strip 12. The sealing strip 12 can also maintain the abutting effect with the second plate body 2 by resisting the elastic force of the helical spring, thereby completing the sealing between the first plate body 1 and the second plate body 2. However, when the length of the tank body 11 is relatively long, it is not convenient to fixedly install the plurality of helical springs respectively.

[0041] Combined with Figure 1 and Figure 2, in order to improve the compression effect of the first spring piece 121, thereby enhancing the abutting effect between the sealing strip 12 and the second plate body 2 against the first spring piece 121, the first spring piece 121 is integrally arranged in a corrugated shape; in other embodiments, the first spring piece 121 can also be arranged in other shapes such as an arc shape, etc.

[0042] Combined with Figure 1 and Figure 2 , in order to further improve the abutting force between the sealing strip 12 and the second plate body 2, thereby enhancing the sealing effect between the first plate body 1 and the second plate body 2 by the sealing strip 12, a plurality of first spring pieces 121 are provided, and each first spring piece 121 is arranged along the length direction of the groove body 11.

[0043] Combined with Figure 1 and Figure 2 , in order to improve the extrusion effect between the plurality of corrugated first spring pieces 121, thereby further enhancing the abutting effect between the sealing strip 12 against the elastic force of the first spring piece 121 and the second plate body 2, the notches of adjacent corrugated first spring pieces 121 are arranged oppositely.

[0044] Combined with Figure 1 and Figure 2 , in order to prevent the sealing strip 12 from disengaging from within the groove body 11, the large-gap compensation sealing structure further includes a limiting member for preventing the sealing strip 12 from disengaging from within the groove body 11.

[0045] Combined with Figure 1 and Figure 2 , the limiting member includes a plurality of bolts 13 that are inserted through and threadedly connected to the first plate body 1, and the plurality of bolts 13 are uniformly arranged along the length direction of the groove body 11. A limiting groove 131 for accommodating the rod end of the bolt 13 is formed along the length direction of the sealing strip 12 on the sealing strip 12. When the sealing strip 12 moves within the groove body 11, the rod end of the bolt 13 restricts the moving distance of the sealing strip 12 within the limiting groove 131.

[0046] When the sealing strip 12 resists the elastic force of the first spring piece 121 and moves within the groove body 11, at this time, the rod end of the bolt 13 is located within the limiting groove 131. When the gap between the first plate body 1 and the second plate body 2 after relative movement is large, the rod end of the bolt 13 is located at a position in the limiting groove 131 away from the second plate body 2. When the gap between the first plate body 1 and the second plate body 2 after relative movement is small, the rod end of the bolt 13 is located at a position in the limiting groove 131 close to the second plate body 2, thereby restricting the moving distance of the sealing strip 12 and preventing the sealing strip 12 from disengaging from within the groove body 11.

[0047] In other embodiments, the bolt 13 can be replaced with a positioning pin that penetrates and is fixedly connected to the first plate body 1. When the sealing strip 12 moves within the groove body 11, the end of the rod portion of the positioning pin is located within the limiting groove 131, which can also prevent the sealing strip 12 from detaching from the groove body 11.

[0048] Combined Figure 1 with Figure 2 and, in order to improve the sealing performance between the sealing strip 12 and the side wall of the groove body 11 and prevent gas or other impurities from passing through the gap between the sealing strip 12 and the side wall of the groove body 11, a receiving groove 122 is formed on the surface of the sealing strip 12 away from the second plate body 2 and opens towards the inside of the sealing strip 12. The receiving groove 122 is arranged along the length direction of the sealing strip 12, and a second elastic member for driving the sealing strip 12 to abut against the side wall of the groove body 11 is arranged in the receiving groove 122.

[0049] Combined Figure 1 with Figure 2 and, the cross-section of the receiving groove 122 is arranged in a "U" shape. The second elastic member includes a second spring piece 123 located in the receiving groove 122 and arranged along the length direction of the receiving groove 122. The second spring piece 123 is arranged in mutual cooperation with the "U"-shaped receiving groove 122, and the notch of the "U"-shaped second spring piece 123 faces the position where the bottom wall of the groove body 11 is located.

[0050] When the "U"-shaped second spring piece 123 is placed in the receiving groove 122, the "U"-shaped second spring piece 123 can squeeze the sealing strip 12 to move towards the side wall of the groove body 11, so that the sealing strip 12 abuts against the side wall of the groove body 11 against the elastic force of the "U"-shaped second spring piece 123, thereby improving the sealing effect between the sealing strip 12 and the side wall of the groove body 11. Combined Figure 1 with Figure 2 and, in order to further improve the abutting effect between the sealing strip 12 against the elastic force of the second spring piece 123 and the side wall of the groove body 11, a plurality of strip-shaped openings 124 are formed along the length direction on the second spring piece 123; the arrangement of the strip-shaped openings 124 can also increase the elasticity of the second spring piece 123.

[0051] Combined Figure 1 with Figure 2 and, in order to further improve the sealing effect between the sealing strip 12 and the side wall of the groove body 11, protrusions 125 are arranged on the two surfaces of the sealing strip 12 facing the side wall of the groove body 11 and located relative to the position where the receiving groove 122 is located. The protrusions 125 are arranged on the sealing strip 12 along the length direction of the receiving groove 122, and the protrusions 125 are integrally formed with the sealing strip 12.

[0052] When the sealing strip 12 is moved into the groove body 11, the protrusion 125 can further squeeze the second spring sheet 123, so that the second spring sheet 123 is further squeezed to a compressed state, so that the protrusion 125 can further resist the elastic force of the second spring sheet 123 and abut against the side wall of the groove body 11, thereby further improving the sealing effect between the sealing strip 12 and the side wall of the groove body 11.

[0053] Combination Figure 1 and Figure 2 In order to further improve the contact effect between the protrusions 125 on both sides and the side walls of the groove body 11 driven by the second spring piece 123, a groove 14 is opened along the length direction of the sealing strip 12 on the surface of the sealing strip 12 away from the limiting groove 131, and the groove 14 is arranged opposite to the limiting groove 131.

[0054] In the present application, the first plate body 1 and the second plate body 2 are used to replace the first component and the second component, so that people skilled in the art can understand the sealing structure of the present application. In other embodiments, the first component and the second component can be replaced by the first rod and the second rod or other objects. The sealing operations performed by the sealing structure of the present application should be covered within the protection scope of the present invention.

[0055] The implementation principle of this embodiment is: when the first plate body 1 and the second plate body 2 move relative to each other, because the first spring piece 121 is in an extruded state, the sealing strip 12 can resist the elastic force of the first spring piece 121 and always maintain the abutment relationship with the second plate body 2, thereby ensuring the sealing effect between the first plate body 1 and the second plate body 2. It is suitable for the case where a large gap appears when the first plate body 1 and the second plate body 2 move relative to each other, and improves the sealing effect between the first component and the second component under different situations; when the sealing strip 12 is located in the groove body 11 and moves, the sealing strip 12 can resist the elastic force of the second spring piece 123 to drive the protrusion 125 to abut against the side wall of the groove body 11 and move on the side wall of the groove body 11, thereby ensuring the sealing effect between the sealing strip 12 and the groove body 11 when the sealing strip 12 is located in the groove body 11 and moves, further improving the sealing performance of the sealing structure when in use.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-gap compensation sealing structure, characterized in that: It includes a groove body (11) opened on the first plate body (1). The groove body (11) is located on the surface of the first plate body (1) facing the second plate body (2) and is arranged towards the inside of the first plate body (1). A sealing structure is arranged in the groove body (11) for ensuring the sealing performance between the first plate body (1) and the second plate body (2) when the first plate body (1) and the second plate body (2) move relatively. The sealing structure includes a sealing strip (12) slidably connected in the groove body (11). The sealing strip (12) is integrally arranged as an elastic strip with elasticity. The sealing structure further includes a first elastic member located between the bottom wall of the groove body (11) and the sealing strip (12). The first elastic member is used to drive the sealing strip (12) to always abut against the second plate body (2) when the first plate body (1) and the second plate body (2) move relatively. The first elastic member includes a first spring piece (121) located between the bottom wall of the groove body (11) and the edge of the sealing strip (12) away from the second plate body (2). The first spring piece (121) is arranged along the length direction of the groove body (11). The first spring piece (121) is integrally arranged in a corrugated shape. A receiving groove (122) is opened towards the inside of the sealing strip (12) on the surface of the sealing strip (12) away from the second plate body (2). The receiving groove (122) is arranged along the length direction of the sealing strip (12). A second elastic member for driving the sealing strip (12) to tightly abut against the side wall of the groove body (11) is arranged in the receiving groove (122). The cross-section of the receiving groove (122) is arranged in a "U" shape. The second elastic member includes a second spring piece (123) located in the receiving groove (122) and arranged along the length direction of the receiving groove (122). The second spring piece (123) is arranged in mutual cooperation with the "U"-shaped receiving groove (122). The notch of the "U"-shaped second spring piece (123) is arranged towards the position where the bottom wall of the groove body (11) is located.

2. A large-gap compensation sealing structure according to claim 1, characterized in that: A plurality of the first spring pieces (121) are provided. Each first spring piece (121) is arranged along the length direction of the groove body (11). The notches of adjacent corrugated first spring pieces (121) are arranged oppositely.

3. A large-gap compensation sealing structure according to claim 1, characterized in that: A plurality of strip-shaped openings (124) are opened along the length direction of the second spring piece (123) on the second spring piece (123).

4. A large-gap compensation sealing structure according to claim 1, characterized in that: Protrusions (125) are arranged on the two surfaces of the sealing strip (12) facing the side wall of the groove body (11) and at positions relative to the receiving groove (122). The protrusions (125) are arranged on the sealing strip (12) along the length direction of the receiving groove (122). The protrusions (125) and the sealing strip (12) are integrally arranged.

5. A large-gap compensation sealing structure according to claim 1, characterized in that: The large-gap compensation sealing structure further includes a limiting member for preventing the sealing strip (12) from detaching within the groove body (11).

6. A large-gap compensation sealing structure according to claim 5, wherein: the limiting member includes a plurality of bolts (13) passing through and threadedly connected to the first plate body (1), the plurality of bolts (13) are uniformly arranged along the length direction of the groove body (11), and a limiting groove (131) for the rod end of the bolt (13) to move into is formed in the sealing strip (12) along the length direction of the sealing strip (12).

7. A large-gap compensation sealing structure according to claim 6, wherein: a groove (14) is formed in the surface of the sealing strip (12) facing away from the limiting groove (131) along the length direction of the sealing strip (12), and the groove (14) is arranged opposite to the limiting groove (131).

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