Perfluoroether sealing assembly

Abstract

The utility model relates to the technical field of sealing elements, in particular to a perfluoroether sealing assembly which comprises a sealing inner ring and a sealing outer ring, the circle center of the sealing inner ring and the circle center of the sealing outer ring are located at the same position, and the sealing inner ring and the sealing outer ring are both made of perfluoroether materials. A connecting ring is fixedly connected between the inner surface of the sealing outer ring and the outer surface of the sealing inner ring, and annular containing cavities are formed between the sealing inner ring and the sealing outer ring and located on the two sides of the connecting ring. And meanwhile, the two elastic tightening rings are clamped into the positions, located on the two sides of the connecting ring, between the inner sealing ring and the outer sealing ring correspondingly, the inner sealing ring is tightened through the tightening capacity of the elastic tightening rings, and the sealing performance of the inner sealing ring can be greatly improved by combining the elastic tightening capacity of the inner sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing components, in particular to a perfluoroether sealing component. Background Art

[0002] Seals are materials or parts that prevent fluids or solid particles from leaking between adjacent mating surfaces and prevent external impurities such as dust and moisture from invading components inside machinery and equipment.

[0003] In the prior art, there is a fully closed-cell perfluoroether microporous sealing ring proposed in patent application number "CN202321544670.0". The utility model includes an upper ring body and a lower ring body, each of which is provided with a plurality of micropores, and a plurality of first cavities are provided at the bottom of the upper ring body.

[0004] However, the perfluoroether sealing ring proposed in the above patent is annular and can be directly put on the surface of the workpiece to provide sealing for the workpiece. However, when providing sealing, it can only rely on the elastic tightening ability of the perfluoroether sealing ring itself to provide sealing. The sealing ability provided is limited and cannot maintain a stable and lasting seal on the workpiece surface. Utility Model Content

[0005] The purpose of the utility model is to provide a perfluoroether sealing component to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A perfluoroether sealing component comprises a sealing inner ring and a sealing outer ring, wherein the centers of the sealing inner ring and the sealing outer ring are located at the same position, and the sealing inner ring and the sealing outer ring are both made of perfluoroether material. A connecting ring is fixedly connected between the inner surface of the sealing outer ring and the outer surface of the sealing inner ring, and an annular accommodating cavity is formed between the sealing inner ring and the sealing outer ring and on both sides of the connecting ring.

[0008] An elastic tightening ring is arranged inside the annular accommodating cavity, and the outer surfaces on both sides of the sealing inner ring are bent upward to form a first positioning convex ring, and the inner surface of the sealing outer ring is fixedly connected to the second positioning convex ring, and the first positioning convex ring and the second positioning convex ring are both attached to the side of the elastic tightening ring away from the connecting ring.

[0009] Preferably, guide curved surfaces are provided on both sides of the sealing inner ring, and the outer surface of the first positioning convex ring is provided as a curved surface.

[0010] Preferably, the connecting ring is provided with two annular shrinkage holes, the cross section of the annular shrinkage holes is rhombus-shaped, and the centers of the two annular shrinkage holes and the center of the sealing inner ring are located at the same position.

[0011] Preferably, the elastic tightening ring is fixedly connected to a first embedded magnetic adsorption component on one side close to the connecting ring, and the two sides of the connecting ring are fixedly connected to a second embedded magnetic adsorption component, and the first embedded magnetic adsorption component and the second embedded magnetic adsorption component are adapted to each other.

[0012] Preferably, annular guide grooves are provided on both sides of the connecting ring, annular positioning grooves are provided on the inner surface of the annular guide grooves, and the opening size of the annular guide grooves gradually decreases from the outside to the inside.

[0013] Preferably, the elastic tightening ring is fixedly connected to a ring-shaped connecting plate on one side close to the connecting ring, one side of the ring-shaped connecting plate passes through the ring-shaped guide groove and extends into the ring-shaped positioning groove, and the side of the ring-shaped connecting plate located in the ring-shaped positioning groove is fixedly connected to a ring-shaped positioning ring.

[0014] Beneficial effects of the utility model:

[0015] The utility model makes use of a sealing inner ring and a sealing outer ring made of perfluoroether material, so that the sealing component has excellent medium resistance performance, and at the same time, two elastic tightening rings are respectively inserted into the positions between the sealing inner ring and the sealing outer ring on both sides of the connecting ring, and the tightening ability of the elastic tightening ring is utilized to tighten the sealing inner ring, and combined with the elastic tightening ability of the sealing inner ring itself, the sealing performance of the sealing inner ring can be greatly improved, so that the sealing inner ring can be more stably put on the workpiece to be sealed, and a reliable sealing ability is provided for the workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 A cross-sectional view of the middle seal outer ring;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the structure of the top portion of the middle seal outer ring;

[0020] Figure 4 This utility model Figure 3 A magnified view of the structure at center A;

[0021] Figure 5 This utility model Figure 2 Schematic diagram of the structure of the middle elastic tightening ring.

[0022] The reference numerals in the figures are as follows:

[0023] 1. Sealing inner ring, 101. Guide curved surface, 102. First positioning convex ring, 2. Sealing outer ring, 201. Second positioning convex ring, 3. Connecting ring, 301. Annular shrinkage hole, 4. Annular accommodating cavity, 5. Elastic tightening ring, 6. First embedded magnetic adsorption component, 7. Second embedded magnetic adsorption component, 8. Annular guide groove, 9. Annular positioning groove, 10. Annular connecting plate, 11. Annular positioning ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A perfluoroether sealing component comprises a sealing inner ring 1 and a sealing outer ring 2. The centers of the sealing inner ring 1 and the sealing outer ring 2 are located at the same place. The sealing inner ring 1 and the sealing outer ring 2 are both made of perfluoroether material. A connecting ring 3 is fixedly connected between the inner surface of the sealing outer ring 2 and the outer surface of the sealing inner ring 1. An annular accommodating cavity 4 is formed between the sealing inner ring 1 and the sealing outer ring 2 and on both sides of the connecting ring 3.

[0026] An elastic tightening ring 5 is arranged inside the annular accommodating cavity 4, and the outer surfaces on both sides of the sealing inner ring 1 are bent upward to form a first positioning convex ring 102, and the inner surface of the sealing outer ring 2 is fixedly connected with a second positioning convex ring 201, and the first positioning convex ring 102 and the second positioning convex ring 201 are both attached to the side of the elastic tightening ring 5 away from the connecting ring 3.

[0027] like Figure 1 and Figure 2 The inner sealing ring 1 and the outer sealing ring 2 are both made of perfluoroether material. They use FFKM perfluoroether raw rubber as raw material, 5 parts of double 25 as vulcanization system, and 30 parts of precipitated silica as filler to prepare the mixed rubber, so that the physical and mechanical properties of the inner sealing ring 1 and the outer sealing ring 2 meet the requirements, and the high temperature performance and medium resistance are excellent.

[0028] The connecting ring 3 connects the sealing inner ring 1 and the sealing outer ring 2 together. The center of the elastic tightening ring 5 and the center of the connecting ring 3 are located in the same horizontal direction. The elastic tightening ring 5 is inserted into the annular accommodating cavity 4. At this time, the first positioning convex ring 102 and the second positioning convex ring 201 are both attached to the outer surface of the elastic tightening ring 5, which can prevent the elastic tightening ring 5 from escaping from the annular accommodating cavity 4, and the elastic tightening ring 5 is pressed against the outer surface of the sealing inner ring 1, which can improve the tightening ability of the sealing inner ring 1.

[0029] The two sides of the sealing inner ring 1 are provided with guiding curved surfaces 101 , and the outer surface of the first positioning convex ring 102 is provided as a curved surface.

[0030] like Figure 1 , Figure 2 and Figure 3 Through the guide curved surface 101, the surface of the workpiece to be sealed can more easily pass through the sealing inner ring 101, so that the inner surface of the sealing inner ring 1 fits the surface of the workpiece to be sealed for sealing. The surface of the first positioning convex ring 102 is a curved surface, so that the elastic tightening ring 5 can be more easily inserted into the inside of the annular accommodating cavity 4 from the outside.

[0031] The connection ring 3 is provided with two annular shrinkage holes 301 , the cross section of the annular shrinkage holes 301 is rhombus-shaped, and the centers of the two annular shrinkage holes 301 and the center of the sealing inner ring 1 are located at the same position.

[0032] like Figure 2 and Figure 3 The connecting ring 3 is made of elastic material, and a shrinkage hole 301 with a diamond-shaped cross section is opened in the connecting ring 3, so that the connecting ring 3 can be elastically expanded and contracted more easily.

[0033] The elastic tightening ring 5 is fixedly connected to a first embedded magnetic adsorption component 6 on one side close to the connecting ring 3, and the two sides of the connecting ring 3 are fixedly connected to a second embedded magnetic adsorption component 7. The first embedded magnetic adsorption component 6 and the second embedded magnetic adsorption component 7 are adapted to each other.

[0034] like Figure 2 and Figure 3 The first embedded magnetic adsorption component 6 and the second embedded magnetic adsorption component 7 are respectively fixed in the tightening ring 5 and the connecting ring 3 in an embedded manner. When the elastic tightening ring 5 is inserted into the annular accommodating cavity 4, the first embedded magnetic adsorption component 6 and the second embedded magnetic adsorption component 7 will be adsorbed together to improve the stability of the elastic tightening ring 5 in the annular accommodating cavity 4.

[0035] Annular guide grooves 8 are formed on both sides of the connection ring 3 , and an annular positioning groove 9 is formed on the inner surface of the annular guide groove 8 . The opening size of the annular guide groove 8 gradually decreases from the outside to the inside.

[0036] The elastic tightening ring 5 is fixedly connected to a ring-shaped connecting plate 10 on one side close to the connecting ring 3 . One side of the ring-shaped connecting plate 10 passes through the ring-shaped guide groove 8 and extends into the ring-shaped positioning groove 9 . The side of the ring-shaped connecting plate 10 located in the ring-shaped positioning groove 9 is fixedly connected to a ring-shaped positioning ring 11 .

[0037] like Figure 2 , Figure 3 , Figure 4 and Figure 5 When the elastic tightening ring 3 is inserted into the annular accommodating cavity 4, the annular positioning ring 11 will enter the annular guide groove 8, and open the annular guide groove 8 and insert into the annular positioning groove 9, thereby assisting in positioning the elastic tightening ring 5 and further improving the stability of the elastic tightening ring 5.

[0038] Compared with the related art, the perfluoroether sealing component provided by the utility model has the following beneficial effects:

[0039] The utility model makes use of a sealing inner ring 1 and a sealing outer ring 2 made of a perfluoroether material, so that the sealing component has excellent medium resistance performance, and at the same time, two elastic tightening rings 5 ​​are respectively inserted into the positions between the sealing inner ring 1 and the sealing outer ring 2 on both sides of the connecting ring 3, and the sealing inner ring 1 is tightened by utilizing the tightening ability of the elastic tightening ring 5, and combined with the elastic tightening ability of the sealing inner ring 1 itself, the sealing performance of the sealing inner ring 1 can be greatly improved, so that the sealing inner ring 1 can be more stably put on the workpiece to be sealed, and a reliable sealing ability is provided for the workpiece surface.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A perfluoroether sealing assembly, comprising a sealing inner ring (1) and a sealing outer ring (2), wherein the centers of the sealing inner ring (1) and the sealing outer ring (2) are located at the same position, and the sealing inner ring (1) and the sealing outer ring (2) are both made of perfluoroether material, characterized in that: A connecting ring (3) is fixedly connected between the inner surface of the sealing outer ring (2) and the outer surface of the sealing inner ring (1), and an annular accommodating cavity (4) is formed between the sealing inner ring (1) and the sealing outer ring (2) and on both sides of the connecting ring (3); An elastic tightening ring (5) is arranged inside the annular accommodating cavity (4); the outer surfaces on both sides of the sealing inner ring (1) are bent upward to form a first positioning convex ring (102); the inner surface of the sealing outer ring (2) is fixedly connected to a second positioning convex ring (201); the first positioning convex ring (102) and the second positioning convex ring (201) are both fitted to the side of the elastic tightening ring (5) away from the connecting ring (3).

2. A perfluoroether sealing assembly according to claim 1, characterized in that: Guide curved surfaces (101) are arranged on both sides of the sealing inner ring (1), and the outer surface of the first positioning convex ring (102) is arranged as a curved surface.

3. A perfluoroether sealing assembly according to claim 2, characterized in that: The connecting ring (3) is provided with two annular shrinkage holes (301), the cross section of the annular shrinkage holes (301) is rhombus-shaped, and the centers of the two annular shrinkage holes (301) and the center of the sealing inner ring (1) are located at the same position.

4. A perfluoroether sealing assembly according to claim 1, characterized in that: The elastic tightening ring (5) is fixedly connected to a first embedded magnetic adsorption component (6) on one side close to the connecting ring (3), and the two sides of the connecting ring (3) are fixedly connected to a second embedded magnetic adsorption component (7), and the first embedded magnetic adsorption component (6) and the second embedded magnetic adsorption component (7) are adapted to each other.

5. A perfluoroether sealing assembly according to claim 1, characterized in that: Annular guide grooves (8) are provided on both sides of the connecting ring (3), an annular positioning groove (9) is provided on the inner surface of the annular guide groove (8), and the opening size of the annular guide groove (8) gradually decreases from the outside to the inside.

6. A perfluoroether sealing assembly according to claim 5, characterized in that: The elastic tightening ring (5) is fixedly connected to a ring-shaped connecting plate (10) on one side close to the connecting ring (3); one side of the ring-shaped connecting plate (10) passes through the ring-shaped guide groove (8) and extends into the ring-shaped positioning groove (9); and one side of the ring-shaped connecting plate (10) located in the ring-shaped positioning groove (9) is fixedly connected to a ring-shaped positioning ring (11).

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