Compact corrugated pipe

Abstract

The invention discloses a compact corrugated pipe. The compact corrugated pipe comprises a pipe body, a corrugated part is formed in the middle area of the pipe body, part of the corrugated part protrudes towards the outside of the pipe body in a V-shaped mode, the other part of the corrugated part protrudes towards the inside of the pipe body in a V-shaped mode, the connecting area of the V-shaped protrusion and the V-shaped recess is arranged in a smooth mode, and the overall longitudinal section of the corrugated part is in a multi-section continuous V shape. The sealing assemblies are distributed at the two ends of the pipe body, do not make contact with the corrugated part and are composed of inner sealing pieces and outer sealing pieces. Compared with common omega-shaped corrugation and v-shaped corrugation design, the original flexibility and scalability of the corrugated pipe are reserved, the compression stroke is remarkably improved, under the same pressure effect, the v-shaped corrugated pipe fitting can easily reach the compression amount of about 50%, and the compression efficiency of the V-shaped corrugated pipe fitting is greatly improved. The corrugated pipe can easily deal with the environment with limited working space and larger compression requirement, and has larger compression space compared with a common corrugated pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of bellows, and in particular relates to a compact bellows. Background Art

[0002] As a common tubular component, the unique Ω-shaped corrugated design of the bellows not only gives it good flexibility and scalability, but also plays a key role in many application fields. However, this design is also accompanied by certain usage restrictions; usually, the Ω bellows has a certain compression range, but when it is compressed to about 25%, it is close to the limit of its stroke. This limit state is the critical point between the performance and safety of the bellows. Once this compression limit is exceeded, the internal structure of the bellows will be under tremendous pressure, causing its shape to undergo irreversible deformation; this deformation will not only affect the normal function of the bellows, but may also cause a series of safety hazards. Summary of the invention

[0003] The object of the present invention is to provide a compact bellows to solve the problem that the existing bellows mentioned in the above background technology have a small compression stroke and cannot be used in an environment with a small working space.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a compact corrugated tube, comprising a tube body; a corrugated portion is formed in the middle area of ​​the tube body, part of the corrugated portion is V-shaped protrusion toward the outside of the tube body, and the other part is V-shaped depression toward the inside of the tube body, the connection area between the V-shaped protrusion and the V-shaped depression is smoothly arranged, and the overall longitudinal section of the corrugated portion is a plurality of continuous "V" shapes.

[0005] As a preferred technical solution of the present invention, it also includes:

[0006] The sealing assembly is provided with two groups and is distributed at both ends of the tube body and does not contact the corrugated part. The sealing assembly is composed of an inner sealing member and an outer sealing member.

[0007] The inner seal is composed of a sealing part and a locking part. The sealing part is integrally arranged on the inner side of the end of the tube body, and the locking part is integrally arranged inside the end of the tube body. Both ends of the locking part penetrate to the outside of the tube body. The center of the locking part and the sealing part are in the same plane. When both ends of the tube body are sleeved on the external pipe or other connecting parts, the sealing part is pressed against the external pipe or other connecting parts through the locking part, so as to achieve a close fit and achieve a sealing effect.

[0008] The outer seal is arranged at the opening of the outer wall of the end of the tube body, and a distance is left between the bottom end of the outer seal and the locking part to avoid affecting the normal operation of the locking part. When the tube body is inserted into an external pipe or other connecting part, sealing can be achieved through the outer seal to avoid leakage.

[0009] As a preferred technical solution in the present invention, the sealing part is an inner sealing ring, which has a guide part formed toward the opening of the tube body, so that the insertion of connectors such as external pipes is facilitated by the guide part to avoid being blocked by the inner sealing ring.

[0010] As a preferred technical solution in the present invention, through holes are opened inside the two ends of the tube body, and the through holes have two holes that penetrate to the outside of the tube body. The locking part is a locking rope, which is inserted into one of the holes of the through hole, passes through the through hole, and comes out from the other hole. The locking rope is in the plane where the midpoint of the inner sealing ring is located. Therefore, in the connection with the external pipeline, by pulling the locking rope, the corresponding area of ​​the tube body can be forced to be concave, and the concave tube body will drive the inner sealing ring to be concave synchronously, so as to achieve a tight connection with the external pipeline and achieve sealing.

[0011] As a preferred technical solution in the present invention, the outer seal includes a sealing retaining ring, which forms an angle with the tube body, and an outer sealing ring is also arranged within the angle. When the external pipe is sleeved on the outside of the tube body, it will first contact the sealing retaining ring, and then press against the outer sealing ring during the gradual downward insertion. At this time, the outer sealing ring presses against the inner wall of the external pipe through deformation rebound, thereby achieving sealing.

[0012] As a preferred technical solution in the present invention, the middle area of ​​the sealing retaining ring bulges outward and forms a bulge, and the outer sealing ring is located between the bulge and the tube body, thereby achieving the placement of the outer sealing ring.

[0013] As a preferred technical solution in the present invention, a vertical limiting portion is also formed in the bottom area of ​​the sealing retaining ring, and the limiting portion is hot-melt connected to the outer wall of the tube body. The limiting portion can be used to limit the external sealing ring to avoid falling off; the top area of ​​the sealing retaining ring is inclined to facilitate the insertion of the external pipe.

[0014] As a preferred technical solution in the present invention, the two ends of the locking rope are connected by knotting and winding, and the diameter of the locking rope is less than or equal to the inner diameter of the through hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, compared with the common Ω corrugation, the V-shaped corrugation design not only retains the original flexibility and scalability of the bellows, but also achieves a significant improvement in the compression stroke. Under the same pressure, the V-shaped bellows can easily achieve a compression amount of about 50%, so that the bellows can cope with the environment with limited working space but greater compression demand with ease, and has a larger compression space than ordinary bellows; in addition, the V-shaped bellows also show more outstanding performance in terms of mechanical life. Due to the use of a more reasonable structural design, the V-shaped bellows can better disperse stress and reduce the wear of the internal structure during the process of bearing pressure, compression and recovery, thereby extending the service life of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 A cross-sectional view of the top position of the present invention;

[0019] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the middle A area;

[0020] Figure 4 It is a structural schematic diagram of the locking rope of the present invention;

[0021] Figure 5 It is a state schematic diagram of the corrugated portion of the present invention.

[0022] In the figure:

[0023] 100, tube body; 101, corrugated portion;

[0024] 102, sealing retaining ring; 102a, raised portion; 102b, limiting portion;

[0025] 103, locking rope; 104, inner sealing ring; 104a, guide part; 105, outer sealing ring; 106, through hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 5 , the present invention provides a technical solution: a compact corrugated pipe, comprising a pipe body 100;

[0028] A corrugated portion 101 is formed in the middle area of ​​the tube body 100. Part of the corrugated portion 101 is V-shaped protrusion toward the outside of the tube body 100, and the other part is V-shaped depression toward the inside of the tube body 100. The connecting area between the V-shaped protrusion and the V-shaped depression is smoothly arranged. The overall longitudinal section of the corrugated portion 101 is a plurality of continuous "V" shapes. Under the same pressure, the compression amount of common bellows products is about 25% of the total length of the tube. The improved new product, the V-shaped bellows fitting can easily achieve a compression amount of about 50%, so that the bellows can cope with the environment with limited working space but greater compression demand with ease. It has a larger compression space than ordinary bellows. A larger compression distance means a greater pressure resistance and a longer mechanical working life under the same size.

[0029] The specific values ​​of the tube body 100 are as follows:

[0030] Total product height ≤100mm 100~200mm 20~300mm ≥300mm Limit compression stroke ratio 50％ 53％ 55％ 58％

[0031] In this embodiment, it also includes:

[0032] The sealing assembly is provided with two groups and is distributed at both ends of the tube body 100 and does not contact the corrugated portion 101. The sealing assembly is composed of an inner sealing member and an outer sealing member.

[0033] The inner seal is composed of a sealing part and a locking part. The sealing part is integrally arranged on the inner side of the end of the tube body 100, and the locking part is entirely inside the end of the tube body 100. Both ends of the locking part penetrate to the outside of the tube body 100. The center of the locking part and the sealing part are in the same plane. When both ends of the tube body 100 are sleeved on the external pipe or other connecting parts, the sealing part is pressed against the external pipe or other connecting parts through the locking part, thereby achieving a tight fit and achieving a sealing effect.

[0034] The outer seal is arranged at the opening of the outer wall at the end of the tube body 100, and a distance is left between the bottom end of the outer seal and the locking part to avoid affecting the normal operation of the locking part. When the tube body 100 is inserted into an external pipe or other connecting part, sealing can be achieved through the outer seal to avoid leakage.

[0035] In this embodiment, the sealing portion is an inner sealing ring 104 , which has a guide portion 104 a formed toward the opening of the tube body 100 . The guide portion 104 a facilitates the insertion of connectors such as external pipes to avoid being blocked by the inner sealing ring 104 .

[0036] In this embodiment, through holes 106 are opened inside both ends of the tube body 100, and the through holes 106 have two holes that penetrate to the outside of the tube body 100. The locking part is a locking rope 103, which is inserted into one of the holes of the through holes 106, passes through the through hole 106, and comes out from the other hole. The locking rope 103 is in the plane where the midpoint of the inner sealing ring 104 is located. Therefore, in the connection with the external pipeline, by pulling the locking rope 103, the corresponding area of ​​the tube body 100 can be forced to be concave, and the concave tube body 100 will drive the inner sealing ring 104 to be concave synchronously, so as to achieve a tight connection with the external pipeline and achieve sealing.

[0037] In this embodiment, the outer sealing member includes a sealing retaining ring 102, and an angle is formed between the sealing retaining ring 102 and the tube body 100. An outer sealing ring 105 is also arranged within the angle. When the external pipe is sleeved on the outside of the tube body 100, it will first contact the sealing retaining ring 102, and as it is gradually inserted downward, it will press against the outer sealing ring 105. At this time, the outer sealing ring 105 presses against the inner wall of the external pipe through deformation rebound, thereby achieving sealing.

[0038] In this embodiment, the middle area of ​​the sealing retaining ring 102 bulges outward to form a bulge 102 a , and the outer sealing ring 105 is located between the bulge 102 a and the tube body 100 , thereby achieving the placement of the outer sealing ring 105 .

[0039] In this embodiment, a vertical limiting portion 102b is also formed in the bottom area of ​​the sealing retaining ring 102, and the limiting portion 102b is hot-melt connected to the outer wall of the tube body 100. The limiting portion 102b can limit the external sealing ring 105 to avoid falling off; the top area of ​​the sealing retaining ring 102 is inclined to facilitate the insertion of the external pipe.

[0040] In this embodiment, the two ends of the locking rope 103 are connected by knotting and winding, and the diameter of the locking rope 103 is less than or equal to the inner diameter of the through hole 106 .

[0041] The following table is the bellows fatigue life test report:

[0042]

[0043] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compact bellows, comprising tube body(100); Features: A corrugated portion (101) is formed in the middle region of the tube body (100), wherein a portion of the corrugated portion (101) is raised in a V-shape toward the outside of the tube body (100), and another portion is recessed in a V-shape toward the inside of the tube body (100), and the connecting region between the V-shaped raised portion and the V-shaped recess is smoothly arranged, and the overall longitudinal section of the corrugated portion (101) is a plurality of continuous "V" shapes.

2. A compact bellows according to claim 1, characterized in that: Also includes: The sealing assembly is provided in two groups and is distributed at both ends of the tube body (100) and does not contact the corrugated portion (101). The sealing assembly is composed of an inner sealing member and an outer sealing member, wherein The inner seal is composed of a sealing portion and a locking portion, the sealing portion is integrally arranged on the inner side of the end of the tube body (100), and the locking portion is entirely located inside the end of the tube body (100), and both ends of the locking portion penetrate to the outside of the tube body (100), and the centers of the locking portion and the sealing portion are located in the same plane; The outer sealing member is arranged at the opening of the outer wall of the end of the tube body (100), and a distance is left between the bottom end of the outer sealing member and the locking portion.

3. A compact bellows according to claim 1, characterized in that: The sealing portion is an inner sealing ring (104), and a guide portion (104a) is formed on the inner sealing ring (104) in the direction of the opening of the tube body (100).

4. A compact bellows according to claim 3, characterized in that: Through holes (106) are provided inside both ends of the tube body (100), and the through hole (106) has two holes that penetrate to the outside of the tube body (100). The locking part is a locking rope (103), and the locking rope (103) is inserted into one of the holes of the through hole (106), passes through the through hole (106), and then passes out from the other hole. The locking rope (103) is located in the plane where the midpoint of the inner sealing ring (104) is located.

5. A compact bellows according to claim 1, characterized in that: The outer sealing member comprises a sealing ring (102), an angle is formed between the sealing ring (102) and the tube body (100), and an outer sealing ring (105) is also arranged within the angle.

6. A compact bellows according to claim 5, characterized in that: The middle area of ​​the sealing retaining ring (102) bulges outwards to form a bulge (102a), and the outer sealing ring (105) is located between the bulge (102a) and the tube body (100).

7. A compact bellows according to claim 6, characterized in that: The bottom area of ​​the sealing ring (102) is also formed with a vertical limiting portion (102b), and the limiting portion (102b) is hot-melt-connected to the outer wall of the tube body (100); the top area of ​​the sealing ring (102) is inclined.

8. A compact bellows according to claim 4, characterized in that: The two ends of the locking rope (103) are connected by knotting and winding, and the diameter of the locking rope (103) is less than or equal to the inner diameter of the through hole (106).

Images