Corrugated pipe capable of preventing air leakage

Abstract

The utility model discloses a bellows capable of preventing air leakage, which relates to the technical field of bellows and comprises a bellows, one end of the bellows is provided with an annular ring, and the inner wall of the other end of the bellows is provided with an annular groove matched with the annular ring. The corrugated pipe comprises an inner layer, a leakage-proof layer arranged on the outer wall of the inner layer and an outer layer arranged on the outer wall of the leakage-proof layer. According to the anti-leakage corrugated pipe, the durability, the wrinkle resistance and the shape preserving performance of the corrugated pipe can be improved and the elastic recovery capacity of the corrugated pipe can be improved through the use of the anti-leakage layer and the performance of a polyester fiber material; through the use of the annular rubber ring, the sealing performance of the joint of the two corrugated pipes can be improved conveniently; and through cooperative use of the annular protrusion and the first annular groove, the contact area between the two corrugated pipes is increased, so that the sealing performance of the joint of the two corrugated pipes is improved, and gas leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a bellows for preventing air leakage. Background Art

[0002] A bellows refers to a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and stretching direction; bellows are widely used in construction, factory production, and instrumentation. Their main purpose is to be used as a measuring element for pressure measuring instruments. They are elastic and can convert pressure into displacement or force. The bellows have a thinner wall and a higher sensitivity, with a measuring range of tens of Pa to tens of MPa. When the bellows are in use, the bellows need to be connected together, but after the existing bellows are connected, the sealing of the two bellows is relatively poor, which can cause gas leakage and affect the use of the bellows. At the same time, the existing bellows are prone to cracking in the middle, which can cause the bellows to deflate. Therefore, a bellows that prevents air leakage is proposed to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a bellows for preventing air leakage, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a bellows for preventing air leakage, comprising a bellows, one end of which is provided with an annular ring, and an annular groove is provided on the inner wall of the other end of the bellows to match the annular ring;

[0005] The corrugated tube comprises an inner layer, a leakproof layer arranged on the outer wall of the inner layer, and an outer layer arranged on the outer wall of the leakproof layer.

[0006] Preferably, the leak-proof layer is made of polyester fiber material, the outer layer is made of wear-resistant rubber material, and the inner layer is made of rubber material.

[0007] Preferably, a plurality of annular convex strips are evenly arranged on the inner wall of the outer layer, and an annular groove 2 is provided on the outer wall of the leak-proof layer to match the annular convex strips.

[0008] Preferably, an annular rubber ring is provided at one end of the bellows, a plurality of annular protrusions are evenly provided on the outer wall of the annular rubber ring, and an annular groove 1 is provided on the inner end surface of the annular groove to match the annular protrusions.

[0009] Preferably, the cross sections of the annular protrusion and the annular groove are both arc-shaped.

[0010] Preferably, an outer thread is provided on the outer wall of the annular ring, and an inner thread is provided on the inner wall of the annular groove to match the outer thread.

[0011] The utility model has at least the following beneficial effects: the utility model uses a leak-proof layer and utilizes the performance of polyester fiber materials to improve the durability, wrinkle resistance and shape retention of the bellows and the elastic recovery ability of the bellows; the use of an annular rubber ring facilitates the improvement of the sealing performance of the connection between the two bellows; the coordinated use of the annular protrusion and the annular groove increases the contact area between the two bellows, thereby improving the sealing performance of the connection between the two bellows and avoiding gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model from a front perspective;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model from a bottom-up perspective;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model from a side perspective;

[0015] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0016] In the figure: 1, bellows; 2, annular ring; 3, annular rubber ring; 4, annular groove; 5, annular groove 1; 6, annular protrusion; 7, inner layer; 8, leakproof layer; 9, annular convex strip; 10, outer layer. DETAILED DESCRIPTION

[0017] 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 in 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.

[0018] Example:

[0019] See also Figure 1-4 The utility model provides a technical solution: a bellows for preventing air leakage, comprising a bellows 1, an annular ring 2 is provided at one end of the bellows 1, and an annular groove 4 is provided on the inner wall of the other end of the bellows 1 to cooperate with the annular ring 2. Through the coordinated use of the annular ring 2 and the annular groove 4, it is convenient to connect the two bellows 1 together, the operation is simple and convenient, and the efficiency of connecting the bellows 1 is improved.

[0020] The bellows 1 includes an inner layer 7, a leakproof layer 8 arranged on the outer wall of the inner layer 7, and an outer layer 10 arranged on the outer wall of the leakproof layer 8; by using, the strength of the bellows 1 is improved, thereby avoiding the phenomenon of breakage in the middle of the bellows 1, thereby improving the leakproofness of the bellows 1; by using the outer layer 10 and the inner layer 7 in combination, it is convenient to improve the strength of the bellows 1.

[0021] In the utility model, the leak-proof layer 8 is made of polyester fiber material, which is a synthetic fiber obtained by spinning polyester formed by the condensation of organic dibasic acid and diol, and belongs to a polymer compound; polyester fiber is strong and durable, wrinkle-resistant and iron-free, and does not stick to hair. It is mainly used for clothing and interior decoration. Its biggest advantage is that it has good wrinkle resistance and shape retention, and has high strength and elastic recovery ability; thereby improving the durability, wrinkle resistance and shape retention of the bellows 1 and the elastic recovery ability of the bellows 1; the outer layer 10 is made of wear-resistant rubber material, and the inner layer 7 is made of rubber material.

[0022] In the utility model, a plurality of annular convex strips 9 are evenly arranged on the inner wall of the outer layer 10 , and an annular groove 2 is provided on the outer wall of the leakproof layer 8 to match the annular convex strips 9 .

[0023] In the utility model, an annular rubber ring 3 is provided at one end of the bellows 1, and a plurality of annular protrusions 6 are evenly provided on the outer wall of the annular rubber ring 3. An annular groove 5 is provided on the inner end surface of the annular groove 4 to cooperate with the annular protrusion 6; by using the annular rubber ring 3, it is convenient to improve the sealing performance of the connection between the two bellows 1.

[0024] In the utility model, the cross-sections of the annular protrusion 6 and the annular groove 5 are both arc-shaped; by using the annular protrusion 6 and the annular groove 5 in coordination, the contact area between the two bellows 1 is increased, thereby improving the sealing of the connection between the two bellows 1 and avoiding gas leakage.

[0025] In the utility model, an outer thread is provided on the outer wall of the annular ring 2, and an inner thread is provided on the inner wall of the annular groove 4 to match the outer thread. The combination of the outer thread and the inner thread facilitates the connection of the two bellows 1, and the connection stability is better.

[0026] Working principle: When the utility model is used, when the bellows 1 are connected, the annular ring 2 on the first bellows 1 is threaded into the annular groove 4 of another bellows 1 under the action of the external thread and the internal thread to achieve the connection of the bellows 1. According to the above method, the various bellows 1 can be connected together;

[0027] Among them, by utilizing the properties of polyester fiber material, the durability, wrinkle resistance and shape retention of the bellows 1 as well as the elastic recovery ability of the bellows 1 can be improved; at the same time, after the two bellows 1 are connected, the annular rubber ring 3 will be squeezed, so that the annular protrusion 6 is squeezed into the annular groove 5, thereby achieving the sealing of the connection between the two bellows 1.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bellows for preventing air leakage, comprising a bellows (1), characterized in that: An annular ring (2) is provided at one end of the bellows (1), and an annular groove (4) is provided on the inner wall of the other end of the bellows (1) to match the annular ring (2); The corrugated tube (1) comprises an inner layer (7), a leakproof layer (8) arranged on the outer wall of the inner layer (7), and an outer layer (10) arranged on the outer wall of the leakproof layer (8).

2. A bellows for preventing air leakage according to claim 1, characterized in that: The leakproof layer (8) is made of polyester fiber material, the outer layer (10) is made of wear-resistant rubber material, and the inner layer (7) is made of rubber material.

3. A bellows for preventing air leakage according to claim 2, characterized in that: A plurality of annular convex strips (9) are evenly arranged on the inner wall of the outer layer (10), and an annular groove two is provided on the outer wall of the leakproof layer (8) in coordination with the annular convex strips (9).

4. The bellows for preventing air leakage according to claim 1, characterized in that: An annular rubber ring (3) is provided at one end of the bellows (1), a plurality of annular protrusions (6) are evenly arranged on the outer wall of the annular rubber ring (3), and an annular groove (5) is provided on the inner end surface of the annular groove (4) to match the annular protrusions (6).

5. The bellows for preventing air leakage according to claim 4, characterized in that: The cross sections of the annular protrusion (6) and the annular groove (5) are both arc-shaped.

6. The bellows for preventing air leakage according to claim 1, characterized in that: An external thread is provided on the outer wall of the annular ring (2), and an internal thread is provided on the inner wall of the annular groove (4) to match the external thread.

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