Corrugated pipe structure capable of improving axial strength of corrugated pipe

By introducing reinforcement wire and reinforcement ring into the bellows structure, combining the limiting mechanism and sealing structure, the problem of easy damage to the bellows during the tensile process is solved, and the axial strength and compressive strength are improved, which extends the service life and reduces the leakage risk at the connection.

CN223257837UActive Publication Date: 2025-08-22JIANGSU WOWENTE NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202422582151.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-08-22
Estimated Expiration
2034-10-25

AI Technical Summary

Technical Problem

The bellows are easily damaged during the tensile process, resulting in a shortening of service life. It is difficult for the prior art to effectively improve its axial strength and compressive strength.

Method used

By introducing reinforcement wires and reinforcement rings into the corrugated tube structure, combining the limiting mechanism and sealing structure, the tensile and compressive resistance of the corrugated tube is enhanced, and the joint nut is prevented from rotating through the limiting plate and limiting groove, ensuring the sealing and stability of the connection.

Benefits of technology

It improves the axial strength and compressive strength of the bellows, extends the service life, reduces the risk of leakage at the connection, and enhances the sealing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a corrugated pipe structure capable of improving the axial strength of a corrugated pipe, which comprises a corrugated pipe body, one end of the corrugated pipe body is fixedly connected with a connecting sleeve, the outer side end of the connecting sleeve is provided with an external thread, the outer side end of the connecting sleeve is symmetrically and fixedly connected with two limiting mechanisms, and the limiting mechanisms are fixedly connected with the corrugated pipe body. The end, away from the connecting sleeve, of the corrugated pipe body is fixedly connected with a fixing sleeve, the outer side end of the fixing sleeve is rotationally connected with a rotating ring, the end, away from the fixing sleeve, of the rotating ring is fixedly connected with a connector nut, and two limiting grooves are symmetrically formed in the outer side end of the connector nut. A plurality of reinforcing wires are fixedly connected to the outer side end of the corrugated pipe body at equal intervals, each reinforcing wire is composed of a wear-resistant coating and a nylon wire, and a plurality of reinforcing rings are arranged at wave crests of the inner wall of the corrugated pipe body. The tensile strength of the corrugated pipe is improved through the reinforcing wires, the compressive strength of the inner wall and the outer wall of the corrugated pipe is improved through the reinforcing rings, and the axial strength of the corrugated pipe is enhanced through cooperation of the reinforcing wires and the reinforcing rings.
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Description

Technical Field

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

[0002] Bellows primarily include metal bellows, bellows expansion joints, bellows heat exchange tubes, diaphragm capsules, and metal hoses. Metal bellows are primarily used to compensate for thermal deformation, reduce vibration, and absorb settlement deformation in pipelines. They are widely used in industries such as petrochemicals, instrumentation, aerospace, chemicals, electric power, water conservancy, and metallurgy. Bellows made of other materials, such as plastic, play an irreplaceable role in media transportation, power line threading, machine tools, and household appliances.

[0003] The bellows can be stretched axially when in use. The wall of the bellows itself is relatively thin and can withstand a limited tensile force. After the bellows is fully stretched, the pressure on the inner wall of the bellows further increases the tensile force on the bellows, causing greater damage to the bellows and reducing its service life. Utility Model Content

[0004] The purpose of the utility model is to provide a bellows structure that improves the axial strength of the bellows, can strengthen the tensile strength and the compressive strength of the inner and outer walls of the bellows, reduce the damage suffered by the bellows after it is fully stretched, and extend the service life of the bellows.

[0005] In order to achieve the above-mentioned purpose, a bellows structure for improving the axial strength of the bellows is provided, comprising a bellows body, one end of the bellows body is fixedly connected to a connecting sleeve, and the bellows body passes through the middle of the connecting sleeve, the outer end of the connecting sleeve is provided with an external thread, and the external thread is located at one end of the bellows, the outer end of the connecting sleeve is symmetrically fixedly connected to two limiting mechanisms, and the limiting mechanisms are located at the end of the connecting sleeve away from the external thread, the end of the bellows body away from the connecting sleeve is fixedly connected to a fixing sleeve, and the bellows body passes through the middle of the fixing sleeve, the outer end of the fixing sleeve is rotatably connected to a rotating ring, and the rotating ring A joint nut is fixedly connected to the end away from the fixed sleeve, and the inner wall of the joint nut is provided with a thread groove that cooperates with the external thread. The outer end of the joint nut is symmetrically provided with two limit grooves, and the limit grooves are away from the rotating ring. The outer end of the corrugated tube body is fixedly connected to a number of reinforcing wires at equal intervals, and the two ends of the reinforcing wires extend to the two ends of the corrugated tube body respectively. The reinforcing wires are composed of a wear-resistant coating and nylon wire. The nylon wire is fixedly connected to the outer end of the corrugated tube body, and the wear-resistant coating is provided on the outer end of the nylon wire. The inner wall of the corrugated tube body is provided with a number of reinforcing rings at the wave crest, and the reinforcing rings are located between the connecting sleeve and the fixed sleeve. This can enhance the tensile strength of the corrugated tube and the compressive strength of the inner and outer walls, reduce the damage to the corrugated tube after it is fully stretched, and extend the service life of the corrugated tube.

[0006] According to a bellows structure for improving the axial strength of a bellows, the limiting mechanism comprises a limiting plate, a handle, a mounting bracket, a screw, and a support block. The mounting bracket is a U-shaped structure and is fixedly connected to the outer end of the connecting sleeve. The support block is located in the mounting bracket and is slidably connected to the inner wall of the mounting bracket. The limiting plate is fixedly connected to one end of the support block and is away from the fixed sleeve. The limiting plate has the same shape and size as the limiting groove. The screw is provided at the middle of the end of the mounting bracket away from the bellows body, passes through the mounting bracket and is threadedly connected to the mounting bracket. The screw passes through one end of the mounting bracket and is rotatably connected to the support block. The handle is fixedly connected to one end of the screw and is away from the support block. The mechanism is used to prevent the joint nut from rotating after the bellows are connected, thereby avoiding gaps in the connection between the bellows.

[0007] According to the bellows structure for improving the axial strength of the bellows, a slide groove is provided in the middle of both ends of the mounting frame, and a slider is fixedly connected to both ends of the support block. The slider is located in the slide groove and is slidably connected to the sidewalls of the slide groove, thereby guiding the support block to prevent it from deflecting when moving.

[0008] According to the bellows structure for improving the axial strength of the bellows, the maximum distance between the support blocks in the mounting brackets of the two limiting mechanisms is greater than the outer diameter of the joint nut, thereby avoiding affecting the rotation of the joint nut on the connecting sleeve.

[0009] According to the bellows structure for improving the axial strength of the bellows, a rubber gasket is provided on the same side end of the connecting sleeve and the bellows body, and the rubber gasket is fixedly connected to the connecting sleeve by an adhesive, thereby improving the sealing performance of the joint after the two bellows are connected.

[0010] According to the bellows structure for improving the axial strength of the bellows, the outer end of the reinforcement ring is attached to the inner wall of the bellows and fixedly connected by an adhesive, and the inner wall of the reinforcement ring is an inwardly convex arc surface, which is used to fix the reinforcement ring and reduce the resistance of the reinforcement ring to the flow of gas in the pipe.

[0011] According to the bellows structure for improving the axial strength of the bellows, an annular groove is provided in the middle of the outer end of the fixed sleeve, and the cross section of the annular groove is T-shaped, and the inner wall of the rotating ring extends to the groove of the fixed sleeve, which is used to limit the rotating ring.

[0012] According to the bellows structure for improving the axial strength of the bellows, the rotating ring and the joint nut are fixedly connected by welding, thereby increasing the connection strength and sealing performance between the rotating ring and the joint nut.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The tensile strength of the bellows is improved by the reinforcing wire, the compressive strength of the inner and outer walls of the bellows is improved by the reinforcing ring, and the axial strength of the bellows is strengthened by the cooperation of the reinforcing wire and the reinforcing ring.

[0015] 2. By using the cooperation of the limiting plate and the limiting groove, the two bellows are connected through the cooperation of the joint nut and the connecting sleeve, and then the joint nut is limited to prevent the joint nut from rotating and causing leakage at the connection between the two bellows.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional diagram of a bellows structure for improving the axial strength of the bellows according to the present invention;

[0019] Figure 2 This is a cross-sectional view of a bellows structure for improving the axial strength of the bellows according to the present invention;

[0020] Figure 3 This is a three-dimensional diagram of a limiting mechanism of a bellows structure for improving the axial strength of the bellows according to the present invention;

[0021] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0022] In the figure: 1. External thread; 2. Limiting mechanism; 3. Bellows body; 4. Reinforcing wire; 5. Limiting groove; 6. Connecting nut; 7. Connecting sleeve; 8. Fixing sleeve; 9. Rotating ring; 10. Limiting plate; 11. Handle; 12. Mounting bracket; 13. Screw; 14. Support block; 15. Slider; 16. Slide groove; 17. Wear-resistant coating; 18. Nylon wire; 19. Reinforcing ring. DETAILED DESCRIPTION

[0023] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0024] See also Figure 1-4The utility model provides a technical solution: a bellows structure for improving the axial strength of the bellows, including a bellows body 3, one end of the bellows body 3 is fixedly connected to a connecting sleeve 7, and the bellows body 3 passes through the middle of the connecting sleeve 7, and a rubber gasket is provided on the same side end of the connecting sleeve 7 and the bellows body 3, and the rubber gasket is fixedly connected to the connecting sleeve 7 by an adhesive, thereby improving the sealing of the joint after the two bellows are connected. The outer end of the connecting sleeve 7 is provided with an external thread 1, and the external thread 1 is located at one end of the bellows. The outer end of the connecting sleeve 7 is symmetrically fixedly connected to two limiting mechanisms 2, and the limiting mechanism 2 is located at the end of the connecting sleeve 7 away from the external thread 1. The limiting mechanism 2 is composed of a limiting plate 10, a handle 11, a mounting frame 12, a screw 13 and a support block 14. The mounting frame 12 is a U-shaped structure and is fixedly connected to the outer end of the connecting sleeve 7. The support block 14 is located in the mounting frame 12 and is slidably connected to the inner wall of the mounting frame 12. The maximum distance between the support blocks 14 in the mounting frames 12 of the two limiting mechanisms 2 is greater than the outer diameter of the joint nut 6 to avoid affecting the rotation of the joint nut 6 on the connecting sleeve 7. A slide groove 16 is provided in the middle of the two side ends of the mounting frame 12. The two side ends of the support block 14 are respectively fixedly connected with a slider 15, and the slider 15 is located in the slide groove 16 and is slidably connected to the side wall of the slide groove 16 to guide the support block 14 to prevent the support block 14 from offsetting when moving. The limiting plate 10 is fixedly connected to one end of the support block 14 and is away from the fixed sleeve 8. The limiting plate 10 has the same shape and size as the limiting groove 5. The screw rod 13 is provided in the middle of the end of the mounting bracket 12 away from the bellows body 3, and the screw rod 13 passes through the mounting bracket 12 and is threadedly connected to the mounting bracket 12. The screw rod 13 passes through one end of the mounting bracket 12 and is rotatably connected to the support block 14. The handle 11 is fixedly connected to one end of the screw rod 13 and is away from the support block 14. It is used to prevent the joint nut 6 from rotating after the bellows are connected, thereby avoiding gaps in the connection between the bellows. The end of the bellows body 3 away from the connecting sleeve 7 is fixedly connected to the fixing sleeve 8, and the bellows body 3 passes through the middle of the fixing sleeve 8. The outer end of the fixing sleeve 8 is rotatably connected to the rotating ring 9. The middle of the outer end of the fixing sleeve 8 is provided with an annular groove, and the cross-section of the annular groove is T-shaped. The inner wall of the rotating ring 9 extends to the groove of the fixing sleeve 8, which is used to limit the rotating ring 9. The end of the rotating ring 9 away from the fixed sleeve 8 is fixedly connected to the joint nut 6, and the inner wall of the joint nut 6 is provided with a thread groove that cooperates with the external thread 1. The rotating ring 9 and the joint nut 6 are fixedly connected by welding, thereby increasing the connection strength and sealing between the rotating ring 9 and the joint nut 6.Two limiting grooves 5 are symmetrically provided on the outer end of the joint nut 6, and the limiting grooves 5 are away from the rotating ring 9. Several reinforcing wires 4 are equidistantly fixedly connected to the outer end of the bellows body 3, and the two ends of the reinforcing wires 4 extend to the two ends of the bellows body 3. The reinforcing wires 4 are composed of a wear-resistant coating 17 and a nylon wire 18. The nylon wire 18 is fixedly connected to the outer end of the bellows body 3, and the wear-resistant coating 17 is provided on the outer end of the nylon wire 18. Several reinforcing rings 19 are provided at the crests of the inner wall of the bellows body 3, and the reinforcing rings 19 are located between the connecting sleeve 7 and the fixing sleeve 8. The outer ends of the reinforcing rings 19 are bonded to the inner wall of the bellows and fixedly connected via an adhesive. The inner wall of the reinforcing rings 19 has an inwardly convex arc surface. This is used to fix the reinforcing rings 19 and reduce the resistance of the reinforcing rings 19 to the flow of gas within the pipe.

[0025] Working principle: When in use, the reinforcing wire 4 improves the tensile strength of the bellows, and the reinforcing ring 19 improves the compressive strength of the inner and outer walls of the bellows. When connecting two bellows, the connecting sleeve 7 of one bellows is threadedly connected to the joint nut 6 of the other bellows. After the joint nut 6 is connected to the connecting sleeve 7, the handles 11 in the two limiting mechanisms 2 are rotated respectively. The handle 11 drives the screw rod 13 to rotate, thereby pushing the support block 14 to move toward the connecting sleeve 7 until the limit block enters the limit groove 5 of the joint nut 6, thereby preventing leakage between the two bellows due to the reverse rotation of the joint nut 6.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A bellows structure for improving the axial strength of the bellows, comprising a bellows body (3), characterized in that: One end of the bellows body (3) is fixedly connected to a connecting sleeve (7), and the bellows body (3) passes through the middle of the connecting sleeve (7). The outer end of the connecting sleeve (7) is provided with an external thread (1), and the external thread (1) is located at one end of the bellows. The outer end of the connecting sleeve (7) is symmetrically fixedly connected to two limiting mechanisms (2), and the limiting mechanisms (2) are located at the end of the connecting sleeve (7) away from the external thread (1). The end of the bellows body (3) away from the connecting sleeve (7) is fixedly connected to a fixing sleeve (8), and the bellows body (3) passes through the middle of the fixing sleeve (8). The outer end of the fixing sleeve (8) is rotatably connected to a rotating ring (9), and the end of the rotating ring (9) away from the fixing sleeve (8) is fixedly connected to a joint nut (6), and the joint The inner wall of the nut (6) is provided with a thread groove that matches the external thread (1); the outer end of the joint nut (6) is symmetrically provided with two limit grooves (5), and the limit grooves (5) are away from the rotating ring (9); the outer end of the corrugated tube body (3) is equidistantly fixedly connected with a plurality of reinforcing wires (4), and the two ends of the reinforcing wires (4) respectively extend to the two ends of the corrugated tube body (3); the reinforcing wires (4) are composed of a wear-resistant coating (17) and a nylon wire (18); the nylon wire (18) is fixedly connected to the outer end of the corrugated tube body (3); the wear-resistant coating (17) is provided at the outer end of the nylon wire (18); a plurality of reinforcing rings (19) are provided at the wave crest of the inner wall of the corrugated tube body (3), and the reinforcing rings (19) are located between the connecting sleeve (7) and the fixing sleeve (8).

2. A bellows structure for improving the axial strength of a bellows according to claim 1, characterized in that: The limiting mechanism (2) is composed of a limiting plate (10), a handle (11), a mounting frame (12), a screw rod (13) and a support block (14); the mounting frame (12) is a U-shaped structure and is fixedly connected to the outer end of the connecting sleeve (7); the support block (14) is located in the mounting frame (12) and is slidably connected to the inner wall of the mounting frame (12); the limiting plate (10) is fixedly connected to one end of the support block (14), and the limiting plate (10) is away from the fixing sleeve (8). The limiting plate (10) and the limiting groove (5) have the same shape and size. The screw rod (13) is arranged at the middle of one end of the mounting frame (12) away from the corrugated tube body (3), and the screw rod (13) passes through the mounting frame (12) and is threadedly connected to the mounting frame (12). One end of the screw rod (13) passes through the mounting frame (12) and is rotatably connected to the support block (14). The handle (11) is fixedly connected to one end of the screw rod (13), and the handle (11) is away from the support block (14).

3. A bellows structure for improving the axial strength of the bellows according to claim 2, characterized in that: A slide groove (16) is provided in the middle of both side ends of the mounting frame (12), and a slider (15) is fixedly connected to both side ends of the support block (14), and the slider (15) is located in the slide groove (16) and is slidably connected to the side wall of the slide groove (16).

4. A bellows structure for improving the axial strength of a bellows according to claim 2, characterized in that: The maximum distance between the support blocks (14) in the mounting frames (12) of the two limiting mechanisms (2) is greater than the outer diameter of the joint nut (6).

5. The bellows structure for improving the axial strength of the bellows according to claim 1, characterized in that: The connecting sleeve (7) and the corrugated tube body (3) are provided with a rubber gasket at the same side end, and the rubber gasket is fixedly connected to the connecting sleeve (7) by an adhesive.

6. The bellows structure for improving the axial strength of the bellows according to claim 1, characterized in that: The outer end of the reinforcement ring (19) is adhered to the inner wall of the corrugated pipe and fixedly connected by an adhesive, and the inner wall of the reinforcement ring (19) is an inwardly convex arc surface.

7. The bellows structure for improving the axial strength of the bellows according to claim 1, characterized in that: An annular groove is provided in the middle of the outer end of the fixed sleeve (8), and the cross section of the annular groove is T-shaped. The inner wall of the rotating ring (9) extends to the groove of the fixed sleeve (8).

8. The bellows structure for improving the axial strength of the bellows according to claim 1, characterized in that: The rotating ring (9) and the joint nut (6) are fixedly connected by welding.