Corrugated pipe

Abstract

The utility model discloses a corrugated pipe, which relates to the technical field of corrugated pipes and comprises a corrugated pipe body, two ends of the corrugated pipe body are respectively connected with a first connecting pipe, the corrugated pipe further comprises a second connecting pipe, a first limiting mechanism and an axial positioning mechanism, the second connecting pipe is coaxially connected with any first connecting pipe in a sliding mode, and the first limiting mechanism is connected with any second connecting pipe in a sliding mode. The first connecting pipe is positioned in the second connecting pipe; the first limiting mechanism is arranged on the outer side wall of the first connecting pipe; the axial positioning mechanism comprises a spring and a limiting piece, one end of the spring is connected with the end, away from the corrugated pipe body, of the first connecting pipe, the other end of the spring is connected with the limiting piece, an annular groove is formed in the inner side wall of the end, close to the corrugated pipe body, of the second connecting pipe, and the limiting piece can abut against the annular groove. According to the corrugated pipe, the first connecting pipe and the second connecting pipe are installed at the two ends of the corrugated pipe body respectively, the first connecting pipe or the second connecting pipe can be used for being connected with a pipeline according to the size of the pipeline, and the adaptability of the corrugated pipe is improved.

Description

Technical Field

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

[0002] The bellows is a kind of wave-like pipe with regular shape. It is mainly used to connect pipes in situations where a small bending radius is required, irregular turns are made, the pipe will have expansion and contraction, or it is not convenient to install with fixed elbows. The bellows can be bent, slightly stretched or compressed. The bellows mainly include metal bellows, bellows expansion joints, bellows heat exchange tubes, diaphragm boxes and metal hoses.

[0003] There are many types of bellows, but the specifications of the joints are mostly fixed, which makes it difficult for the joints to meet the needs of diversified pipe connections. When a bellows is used to connect two pipes, it is often the case that a type of bellows can only adapt to pipes of corresponding diameters, but cannot adapt to pipes of multiple diameters. The Chinese patent with application number CN202020829387.2 discloses a bellows quick connector for valves, which can connect and fix pipes of different diameters, greatly improving the scope of application of the device. Although the bellows quick connector can connect and fix pipes of different diameters, the retractable and adjustable threaded pipes on both sides of the connector have a taper. The tightening knob and the ring can be used together to tighten the threaded pipe, but due to the presence of the taper, this fastening structure is easy to move on the threaded pipe when vibration occurs, thereby affecting the fastening effect.

[0004] Therefore, a bellows is proposed. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a bellows.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A bellows comprises a bellows body, both ends of which are connected to a first connecting tube, a second connecting tube, a first limiting mechanism and an axial positioning mechanism, the second connecting tube is coaxially slidably connected to any of the first connecting tubes, the first connecting tube is located inside the second connecting tube; the first limiting mechanism is arranged on the outer side wall of the first connecting tube, and is used to limit the sliding stroke of the second connecting tube in the axial direction of the first connecting tube; the axial positioning mechanism comprises a spring and a limiting member, one end of the spring is connected to an end of the first connecting tube away from the bellows body, and the other end is connected to the limiting member, an annular groove is provided on the inner side wall of the second connecting tube close to one end of the bellows body, and the limiting member can abut against the annular groove.

[0008] Furthermore, in the utility model, the first limiting mechanism includes a first limiting ring and a second limiting ring which are spaced apart on the outer wall of the first connecting tube, the first limiting ring is arranged close to the bellows body, the second limiting ring is arranged away from the bellows body, the outer diameter of the second limiting ring is the same as the inner diameter of the second connecting tube, the outer diameter of the first limiting ring is larger than the inner diameter of the second connecting tube, the second connecting tube is detachably connected to the first limiting ring, the second limiting ring wraps the positioning mechanism, and the limiting member can extend out of the second limiting ring.

[0009] Furthermore, in the utility model, a third limiting ring is provided at one end of the second connecting tube close to the first limiting ring, and the third limiting ring is magnetically connected to the first limiting ring.

[0010] Furthermore, in the utility model, a through hole is opened in the circumference of the second limiting ring, the central axis of the through hole is perpendicular to the sliding direction of the second connecting pipe, and the spring and the limiting member are both located in the through hole.

[0011] Furthermore, in the present invention, the above-mentioned limiting member is a spherical structure, the cross-section of the above-mentioned annular groove is a semicircular shape adapted to the above-mentioned limiting member, and the center of the above-mentioned limiting member can coincide with the central axis of the above-mentioned annular groove.

[0012] Furthermore, in the utility model, a sealing ring is provided on the first connecting tube, the sealing ring is located on a side of the second limiting ring away from the first limiting ring, and the sealing ring abuts against an inner wall of the second connecting tube.

[0013] Furthermore, in the present invention, one end of the first connecting pipe away from the bellows body is internally chamfered.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a corrugated pipe, wherein a first connecting pipe and a second connecting pipe are respectively installed at both ends of a corrugated pipe body. The first connecting pipe or the second connecting pipe can be used to connect with the pipeline according to the size of the pipeline, thereby improving the adaptability of the corrugated pipe. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a schematic diagram of the structure after the position-limiting member of the embodiment of the utility model abuts against the annular groove;

[0018] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0019] In the figure: 1- bellows body; 2- first connecting pipe; 3- second connecting pipe; 4- spring; 5- limiting member; 6- annular groove; 7- first limiting ring; 8- second limiting ring; 9- third limiting ring; 10- through hole; 11- sealing ring; 12- magnetic block. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments to clearly and completely describe the technical solution 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 those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] A bellows comprises a bellows body 1, both ends of which are connected to a first connecting tube 2, a second connecting tube 3, a first limiting mechanism and an axial positioning mechanism, the second connecting tube 3 is coaxially slidably connected to any first connecting tube 2, the first connecting tube 2 is located in the second connecting tube 3; the first limiting mechanism is arranged on the outer side wall of the first connecting tube 2, and is used to limit the sliding stroke of the second connecting tube 3 in the axial direction of the first connecting tube 2; the axial positioning mechanism comprises a spring 4 and a limiting member 5, one end of the spring 4 is connected to the end of the first connecting tube 2 away from the bellows body 1, and the other end is connected to the limiting member 5, an annular groove 6 is provided on the inner side wall of the second connecting tube 3 close to the end of the bellows body 1, and the limiting member 5 can abut against the annular groove 6.

[0023] In this embodiment, the two first connecting pipes 2 are connected as one through the bellows body 1, which is convenient for the bellows to connect the two pipes that need to be connected. The inner threads can be processed on the inner walls of the two first connecting pipes 2, and then connected to the pipes by threaded connection. The second connecting pipe 3 coaxially slidably connected with the first connecting pipe 2 is convenient for the bellows to be connected to pipes of various diameters without replacing the bellows, thereby improving the adaptability of the bellows. The first limiting mechanism is used to limit the sliding stroke of the second connecting pipe 3 in the axial direction of the first connecting pipe 2. When the second connecting pipe 3 moves to the extreme position away from the bellows body 1, the axial positioning mechanism immediately takes effect, so that the second connecting pipe 3 stays in the current position. Specifically, when the second connecting pipe 3 needs to be connected to the pipeline, the second connecting pipe 3 can be moved, and the second connecting pipe 3 moves toward the free end of the first connecting pipe 2. After the second connecting pipe 3 moves to the extreme position, the limiting member 5 abuts against the annular groove 6 under the action of the spring 4, and the second connecting pipe 3 can no longer move in the axial direction of the first connecting pipe 2. Threads can be processed on both the inner and outer walls of the second connecting pipe 3. Depending on the diameter of the pipeline, the inner thread of the second connecting pipe 3 is matched with the outer thread of the pipeline, or the outer thread of the second connecting pipe 3 is matched with the inner thread of the pipeline.

[0024] In some implementations of the present embodiment, the first limiting mechanism includes a first limiting ring 7 and a second limiting ring 8 which are spaced apart on the outer wall of the first connecting tube 2. The first limiting ring 7 is arranged close to the bellows body 1, and the second limiting ring 8 is arranged away from the bellows body 1. The outer diameter of the second limiting ring 8 is the same as the inner diameter of the second connecting tube 3. The outer diameter of the first limiting ring 7 is larger than the inner diameter of the second connecting tube 3. The second connecting tube 3 is detachably connected to the first limiting ring 7. The second limiting ring 8 wraps the positioning mechanism inside, and the limiting member 5 can extend out of the second limiting ring 8.

[0025] In this embodiment, the second limiting mechanism is designed as such a structure to conveniently limit the sliding stroke of the second connecting tube 3 in the axial direction of the first connecting tube 2. The distance from the first limiting ring 7 to the second limiting ring 8 is the sliding stroke of the second connecting tube 3. The second connecting tube 3 is detachably connected to the first limiting ring 7, so that when the second connecting tube 3 is not in use, the second connecting tube 3 can be fixed on the first connecting tube 2 so that it does not move.

[0026] In some implementations of the present embodiment, a third limiting ring 9 is provided at one end of the second connecting tube 3 close to the first limiting ring 7 , and the third limiting ring 9 is magnetically connected to the first limiting ring 7 .

[0027] In this embodiment, the third limiting ring 9 and the first limiting ring 7 are detachably connected by magnetic connection, which is convenient for fixing the second connecting tube 3. When the second connecting tube 3 is not in use, the second connecting tube 3 can be fixed to the first connecting tube 2 by magnetic attraction; when the second connecting tube 3 is in use, the third limiting ring 9 is separated from the first limiting ring 7 to move the second connecting tube 3. The first limiting ring 7 can be made of a metal material that can be magnetically attracted by a magnet, and a plurality of magnetic blocks 12 can be embedded in the third limiting ring 9 to achieve this magnetic connection.

[0028] In some implementations of this embodiment, a through hole 10 is opened in the circumference of the second limiting ring 8 , the central axis of the through hole 10 is perpendicular to the sliding direction of the second connecting tube 3 , and the spring 4 and the limiting member 5 are both located in the through hole 10 .

[0029] In this embodiment, the through hole 10, on the one hand, wraps the spring 4 and the stopper 5 inside, protecting the two; on the other hand, the through hole 10 can limit the moving direction of the stopper 5, so that the stopper 5 can only move in one direction under the action of the spring 4. When designing, the distance from the central axis of the through hole 10 to the side of the second stopper ring 8 close to the first stopper ring 7 can be made the same as the distance from the central axis of the annular groove 6 to the side of the third stopper ring 9 away from the first stopper ring 7, so that when the third stopper ring 9 abuts against the second stopper ring 8 driven by the second connecting pipe 3, the central axis of the through hole 10 is exactly coplanar with the central axis of the annular groove 6, which facilitates the abutment of the stopper 5 with the annular groove 6, thereby achieving the purpose of limiting.

[0030] In some implementations of this embodiment, the limiting member 5 is a spherical structure, the cross-section of the annular groove 6 is a semicircle adapted to the limiting member 5 , and the center of the limiting member 5 can coincide with the central axis of the annular groove 6 .

[0031] In this embodiment, the limiting member 5 and the annular groove 6 are designed as this structure. On the first hand, it is convenient for the limiting member 5 to achieve the limiting effect; on the second hand, when the second connecting tube 3 is connected to the pipeline by threaded connection, it is convenient for the second connecting tube 3 to rotate around the central axis of the first connecting tube 2, and the second connecting tube 3 is connected to the pipeline without rotating the pipeline; on the third hand, after the second connecting tube 3 is used, it is convenient to separate the limiting member 5 from the annular groove 6 under the action of external force, and then the third limiting ring 9 is magnetically connected to the first limiting ring 7, so that the second connecting tube 3 is fixed on the first connecting tube 2 for easy storage.

[0032] In some implementations of this embodiment, a sealing ring 11 is provided on the first connecting tube 2 . The sealing ring 11 is located on a side of the second limiting ring 8 away from the first limiting ring 7 . The sealing ring 11 abuts against the inner wall of the second connecting tube 3 .

[0033] In this embodiment, the sealing ring 11 is used to seal the connection between the first connecting pipe 2 and the second connecting pipe 3 to reduce the probability of liquid or other fluids flowing out therefrom.

[0034] In some implementations of this embodiment, one end of the first connecting pipe 2 away from the corrugated pipe body 1 is chamfered internally.

[0035] In this embodiment, when the second connecting pipe 3 is used to connect with the pipeline, this design facilitates the fluid or medium in the pipeline to flow into the corrugated pipe body 1 through the second connecting pipe 3, thereby reducing the flow resistance.

[0036] Working principle:

[0037] When the first connecting tube 2 is used to connect with the pipeline, internal threads can be processed on the inner walls of the two first connecting tubes 2, and then connected with the pipeline by threaded connection. When the second connecting tube 3 is needed to connect with the pipeline, the second connecting tube 3 can be moved until the stopper 5 abuts against the annular groove 6 under the action of the spring 4, and the second connecting tube 3 can no longer move in the axial direction of the first connecting tube 2. Threads can be processed on both the inner and outer walls of the second connecting tube 3, and according to the diameter of the pipeline, the internal threads of the second connecting tube 3 are selected to be matched with the external threads of the pipeline, or the external threads of the second connecting tube 3 are selected to be matched with the internal threads of the pipeline.

[0038] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A bellows, comprising a bellows body (1), both ends of the bellows body (1) being connected to first connecting pipes (2), characterized in that: Also includes: a second connecting tube (3), the second connecting tube (3) being coaxially slidably connected to any of the first connecting tubes (2), the first connecting tube (2) being located inside the second connecting tube (3); a first limiting mechanism, the first limiting mechanism being arranged on the outer side wall of the first connecting tube (2) and being used for limiting the sliding travel of the second connecting tube (3) in the axial direction of the first connecting tube (2); An axial positioning mechanism, the axial positioning mechanism comprising a spring (4) and a stopper (5), one end of the spring (4) being connected to an end of the first connecting tube (2) away from the bellows body (1), and the other end being connected to the stopper (5), an annular groove (6) being provided on the inner side wall of an end of the second connecting tube (3) close to the bellows body (1), and the stopper (5) being capable of abutting against the annular groove (6).

2. A corrugated tube according to claim 1, characterized in that: The first limiting mechanism comprises a first limiting ring (7) and a second limiting ring (8) which are arranged at intervals on the outer wall of the first connecting tube (2); the first limiting ring (7) is arranged close to the bellows body (1), and the second limiting ring (8) is arranged away from the bellows body (1); the outer diameter of the second limiting ring (8) is the same as the inner diameter of the second connecting tube (3); the outer diameter of the first limiting ring (7) is larger than the inner diameter of the second connecting tube (3); the second connecting tube (3) is detachably connected to the first limiting ring (7); the second limiting ring (8) wraps the positioning mechanism inside, and the limiting member (5) can extend out of the second limiting ring (8).

3. A corrugated tube according to claim 2, characterized in that: A third limiting ring (9) is provided at one end of the second connecting tube (3) close to the first limiting ring (7), and the third limiting ring (9) is magnetically connected to the first limiting ring (7).

4. A corrugated tube according to claim 2, characterized in that: A through hole (10) is provided in the circumferential direction of the second limiting ring (8); the central axis of the through hole (10) is perpendicular to the sliding direction of the second connecting tube (3); and the spring (4) and the limiting member (5) are both located in the through hole (10).

5. A corrugated tube according to claim 4, characterized in that: The limiting member (5) is a spherical structure, the cross section of the annular groove (6) is a semicircle adapted to the limiting member (5), and the center of the limiting member (5) can coincide with the center axis of the annular groove (6).

6. A corrugated tube according to claim 2, characterized in that: A sealing ring (11) is provided on the first connecting tube (2), the sealing ring (11) is located on a side of the second limiting ring (8) away from the first limiting ring (7), and the sealing ring (11) abuts against an inner side wall of the second connecting tube (3).

7. The corrugated tube according to claim 1, characterized in that: An end of the first connecting pipe (2) away from the bellows body (1) is internally chamfered.

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