Corrugated breather pipe adopting built-in double-buckle structure

Abstract

The utility model discloses a corrugated breather pipe with a built-in double-buckle structure. The corrugated breather pipe comprises a pipe body and a protective shell. The conduit body includes an outer conduit and an inner conduit. The outer guide pipe is a corrugated pipe and is arranged on the outer wall of the inner guide pipe in a sleeving mode. And the protective shell is sleeved on the outer ring of the corrugated pipe. The inner guide pipe, the corrugated pipe and the end portions of the two sides of the protective shell are fixed through welding. The inner guide pipe and the corrugated pipe arranged on the inner guide pipe in a sleeving mode are adopted to form the pipeline body. The outer guide pipe and the inner guide pipe form multi-layer leakage prevention for conveyed gas, gas leakage is effectively avoided, and the service life of the breather pipe is prolonged. Meanwhile, pre-tightening pieces capable of pre-tightening are arranged at the two ends of the protective shell; the inner guide pipe, the corrugated pipe and the outer end of the protective shell can be tightly attached in the welding process, and the situation that due to the fact that gaps among the inner guide pipe, the corrugated pipe and the protective shell are too large, the sealing performance of the breather pipe is insufficient is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of connecting pipes, and in particular relates to a corrugated ventilation pipe with a built-in double buckle structure. Background Art

[0002] As a kind of connecting and conveying pipe fittings, the vent pipe is widely used in gas transportation. Commonly used vent pipes are usually rigid straight pipes. When used in harsh environments, rigid vent pipes are prone to local damage due to shaking. At the same time, when the gas displacement changes suddenly, the rigid straight pipe is prone to local rupture due to the change in displacement, and there is a problem of pressure difference.

[0003] In the prior art, some ventilation pipes adopt a double-layer structure to prevent gas leakage caused by damage to a single pipe and increase the service life of the ventilation pipe. However, the double-layer straight pipe ventilation pipe still cannot solve the problem of local damage caused by shaking and deformation. At the same time, the ventilation pipe is easily impacted by the outside world, which may cause damage to the outer wall and cause leakage of the transported gas. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a corrugated ventilation pipe with a built-in double buckle structure to solve technical problems such as pressure difference and susceptibility to external factors.

[0005] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0006] A corrugated vent pipe with a built-in double buckle structure includes a pipe body and a protective shell. The pipe body includes an outer conduit and an inner conduit. The outer conduit is a corrugated pipe and is sleeved on the outer wall of the inner conduit. The protective shell is sleeved on the outer ring of the corrugated pipe. The inner conduit, the corrugated pipe and the ends of both sides of the protective shell are fixed by welding.

[0007] Furthermore, the protection shell is divided into a protection section and connection sections located at both ends of the protection section. The connection sections are fitted with the outer ends of the corrugated pipe.

[0008] Furthermore, the inner diameter of the protection section of the protection shell is larger than the outer diameter of the corresponding position of the inner conduit.

[0009] Furthermore, the connection between the protection section and the connection section is a smooth integrated structure.

[0010] Furthermore, the protective shell is formed by braiding steel wire.

[0011] Furthermore, the device also includes a pre-tightening member, which adopts a sleeve structure and is sleeved on the end of the protection shell. The protection shell, the corrugated tube, the inner conduit, and the two side ends of the pre-tightening member are fixed by welding.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The utility model provides pre-tightening parts at both ends of the protective shell, so that the inner conduit, the bellows and the outer ends of the protective shell can fit tightly during welding, thereby avoiding insufficient sealing of the ventilation pipe due to excessive gaps between the inner conduit, the bellows and the protective shell.

[0014] 2. The utility model adopts an inner conduit and a corrugated tube sleeved on the inner conduit to form the main body of the pipe. The outer conduit and the inner conduit form a multi-layer leak-proof system for the transported gas, effectively preventing gas leakage. At the same time, the corrugated tube can withstand small vibrations and deform, reducing the probability of damage to the outer layer of the exhaust pipe and extending the service life of the ventilation pipe.

[0015] 3. The utility model can effectively reduce the impact of external impact on the bellows by arranging a protective shell on the outer ring of the bellows, reduce the breakage rate of the bellows during use, and enhance the firmness of the ventilation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural side view of the utility model;

[0018] Figure 3 For the utility model Figure 2 Cross-sectional view along the AA direction.

[0019] Figure numerals: 1, protective shell; 1-1, protective section; 1-2, connecting section; 2, bellows; 3, inner conduit; 4, preload member. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] The utility model will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 and 2As shown, a corrugated vent pipe with a built-in double buckle structure includes a pipe body and a protective shell 1. The protective shell 1 is sleeved on the outer wall of the pipe body. The ends of the protective shell 1 and the pipe body are pre-tightened by a pre-tightening member 4 and fixed by welding. The protective shell 1 is used to protect the outer wall of the pipe body to prevent the pipe body from being damaged due to external factors.

[0023] like Figure 2 and 3 As shown, the pipeline body includes an outer conduit and an inner conduit 3. The inner conduit 3 is a vertical conduit, and the outer conduit is a bellows 2. The bellows 2 is sleeved on the outer wall of the inner conduit 3. The outer conduit and the inner conduit 3 form a built-in double buckle structure, that is, a double-layer leak-proof structure, which effectively avoids gas leakage and prolongs the service life of the ventilation pipe.

[0024] In this embodiment, the protective shell 1 is formed by braiding steel wire. The protective shell 1 is divided into a protective section 1-1 and connecting sections 1-2 located at both ends of the protective section 1-1. The end diameter of the connecting section 1-2 of the protective shell 1 is adapted to the end diameter of the bellows 2, so that the end of the protective shell 1 can fit with the end of the bellows 2. The inner diameter of the protective section 1-1 of the protective shell 1 is larger than the outer diameter of the corresponding position of the inner conduit 3. The inner wall of the protective section 1-1 and the outer wall of the inner conduit 3 together form an installation cavity, providing space for the installation of the bellows 2. The connection between the protective section 1-1 and the connecting section 1-2 is a smooth integrated structure.

[0025] In this embodiment, the pre-tightening member 4 adopts a collar structure. After the inner conduit 3, the bellows 2 and the protective shell 1 are sequentially sleeved, the pre-tightening member 4 is sleeved on the end of the connecting section 1-2 of the protective shell 1. The protective shell 1, the bellows 2, the inner conduit 3, and the two side ends of the pre-tightening member 4 are fixed by welding. The provision of the pre-tightening member 4 allows the outer ends of the inner conduit 3, the bellows 2 and the protective shell 1 to fit tightly during welding, thereby avoiding insufficient sealing of the vent pipe due to excessive gaps between the inner conduit 3, the bellows 2 and the protective shell 1.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A corrugated ventilation pipe with a built-in double buckle structure, comprising a pipe body; the pipe body comprises an outer conduit and an inner conduit (3); characterized in that: It also comprises a protective shell (1); the outer conduit is a bellows (2) and is sleeved on the outer wall of the inner conduit (3); the protective shell (1) is sleeved on the outer ring of the bellows (2); and the inner conduit (3), the bellows (2) and the protective shell (1) are fixed at both ends by welding.

2. The corrugated vent pipe with a built-in double buckle structure according to claim 1, characterized in that: The protective shell (1) is divided into a protective section (1-1) and connecting sections (1-2) located at both ends of the protective section (1-1); the connecting section (1-2) is fitted with the outer end of the corrugated tube (2).

3. The corrugated vent pipe with a built-in double buckle structure according to claim 2, characterized in that: The inner diameter of the protection section (1-1) of the protection shell (1) is greater than the outer diameter of the corresponding position of the inner conduit (3).

4. The corrugated vent pipe with a built-in double buckle structure according to claim 2, characterized in that: The connection between the protection section (1-1) and the connection section (1-2) is a smooth integrated structure.

5. The corrugated vent pipe with a built-in double buckle structure according to claim 1, characterized in that: The protective shell (1) is formed by braiding steel wires.

6. The corrugated vent pipe with a built-in double buckle structure according to claim 1, characterized in that: It also includes a pre-tightening member (4); the pre-tightening member (4) adopts a sleeve structure and is sleeved on the end of the protective shell (1); the protective shell (1), the bellows (2), the inner conduit (3), and the two side ends of the pre-tightening member (4) are fixed by welding.

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