Anti-fatigue pressure-resistant vacuum corrugated pipe assembly

Abstract

The utility model relates to the field of corrugated pipe connecting devices, and discloses an anti-fatigue pressure-resistant vacuum corrugated pipe assembly which comprises a pipe wall, the top of the pipe wall is fixedly connected with a pipe head, the outer wall of the pipe head is fixedly connected with a rubber pad, and the bottom end of the rubber pad is fixedly connected with the pipe wall. The top of the outer wall of the pipe head is fixedly connected with a fixing ring, the inner wall of the fixing ring is fixedly connected with a conical hose, the outer wall of the fixing ring is fixedly connected with a threaded sleeve, the outer wall of the threaded sleeve is in threaded connection with a connector, and a threaded groove is formed in the upper side of the inner wall of the connector. According to the utility model, the rubber pad is used for absorbing small displacement of the pipe head caused by external force, stress concentration between the pipe head and the pipe wall is reduced, the anti-fatigue performance of the assembly is improved, the rubber sleeve and the conical hose share torsion generated when the joint of the pipe wall and the pipe head is bent, and the problem that the end of the corrugated pipe is bent repeatedly and becomes fatigue to cause fracture is solved.

Description

Technical Field

[0001] The utility model relates to the field of bellows connecting devices, in particular to a fatigue-resistant and pressure-resistant vacuum bellows component. Background Art

[0002] A bellows is a bendable pipe commonly used in gas transportation. It is generally formed by axially compressing a plain tube using bellows manufacturing equipment, creating a ring-shaped folded convex structure on the outer periphery of the tube wall. Repeated bending during use can lead to fatigue and fragility, leading to breakage of the bellows. Therefore, a fatigue-resistant and pressure-resistant vacuum bellows assembly is required.

[0003] After searching, the Chinese patent announcement number is: CN220337760U, which discloses a bellows assembly, including a first bellows, a locking nut and abutting against the left side of the flange on the right connecting pipe, an outer sealing gasket is fixed on the surface of the flange, and when the first bellows and the second bellows are connected for use, the outer sealing gasket is placed in the outer sealing groove on the surface of the flange, the right connecting pipe and the left connecting pipe are butted together, the sealing sleeve enters the inside of the sealing groove to achieve the initial sealing of the right connecting pipe and the left connecting pipe, and the inner sealing gasket is butted against the inner wall of the inner sealing groove in the right connecting pipe to form a secondary seal. The sealing performance is good. When connected, the positioning rod is docked in the positioning hole to limit the rotation of the sealing sleeve, reduce the wear between the sealing sleeve, the inner sealing gasket and the inner wall of the right connecting pipe, and improve the service life and sealing performance of the sealing sleeve and the inner sealing gasket. The fixing bolts are screwed into the threaded holes on the two sets of flanges and locked with the locking nuts. The assembly has good sealing performance to ensure that there will be no gap at the connection between the two bellows. However, due to the hard texture of the components at the connection, the torsion on the end of the bellows cannot be shared when the bellows is bent, which will cause the end of the bellows to fatigue and rupture, making the bellows fail. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a fatigue-resistant and pressure-resistant vacuum bellows assembly, which aims to improve the problem in the existing technology that the components at the connection are hard and cannot share the torque exerted on the end when the bellows is bent, which will cause fatigue and rupture of the bellows end, making the bellows fail.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a fatigue-resistant and pressure-resistant vacuum bellows assembly, comprising a tube wall, a tube head fixedly connected to the top of the tube wall, a rubber pad fixedly connected to the outer wall of the tube head, the bottom end of the rubber pad fixedly connected to the tube wall, a fixing ring fixedly connected to the top of the outer wall of the tube head, a conical hose fixedly connected to the inner wall of the fixing ring, a threaded sleeve fixedly connected to the outer wall of the fixing ring, a connector threadedly connected to the outer wall of the threaded sleeve, a threaded groove provided on the upper side of the inner wall of the connector, and a connecting mechanism provided inside the connector.

[0006] Through the above technical solution: when there is a pressure change in the pipe or the outside is subjected to vibration, impact, etc., the rubber pad can produce elastic deformation, and the tapered hose passes through the pipe head and extends into the interior of the pipe wall. When the connection between the pipe wall and the pipe head bends, the tapered hose can share the force of the external force on the pipe wall, preventing the end of the pipe wall from excessive bending and causing rupture. The threaded connection between the threaded sleeve and the connector makes the connector more secure and easy to replace. The threaded groove above the inner wall of the connector is used to connect other pipes.

[0007] As a further description of the above technical solution:

[0008] The connecting mechanism includes a connecting sleeve, which is threadedly connected to the upper side of the inner wall of the connecting head, and the top of the outer wall of the connecting sleeve is fixedly connected to a limiting ring. The outer wall of the connecting sleeve is slidably connected to a flange plate 1, and a groove is provided on the top of the outer wall of the flange plate 1. The groove is engaged with the limiting ring. The top of the flange plate 1 is threadedly connected with multiple bolts all around, and the top of the outer wall of the multiple bolts is threadedly connected with a flange plate 2.

[0009] Through the above technical solution: a threaded connection is used between the connecting sleeve and the connecting head, which can withstand a certain amount of tension and pressure; the limiting ring limits the movement distance of flange one; flange one is rotatably connected to the connecting sleeve, and flange one can be rotated to adjust the docking angle, thereby avoiding rotation of the pipe wall and reducing the torque of the pipe wall; the limiting ring engages with the groove to form a sealed structure to prevent gas or liquid from leaking from the connection part; the bolts enable flange one and flange two to be tightly connected together to withstand the pressure and external force inside the pipeline.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the rubber pad is fixedly connected with a clamping ring, and a rubber sleeve is provided on the outer side of the rubber pad. The rubber sleeve is clamped with the clamping ring and the pipe wall.

[0012] Through the above technical solution: the rubber sleeve is engaged with the rubber pad and the pipe wall to provide protection for the end of the pipe wall and prevent the end from being squeezed by external objects and causing rupture.

[0013] As a further description of the above technical solution:

[0014] A rubber ring is fixedly connected to the bottom of the outer wall of the conical hose, and the outer diameter of the rubber ring is equal to the inner diameter of the tube wall.

[0015] Through the above technical solution: the rubber ring has high resilience, and after entering the pipe wall, it rebounds and fits the pipe wall to prevent the pipe wall from excessive bending.

[0016] As a further description of the above technical solution:

[0017] The tops of the outer walls of the plurality of bolts are all threadedly connected with nuts, and the bottoms of the plurality of bolts are all provided with cross grooves.

[0018] Through the above technical solution: the nut can increase the pre-tightening force of the bolt, and the cross groove facilitates installation and disassembly using tools.

[0019] As a further description of the above technical solution:

[0020] A sealing gasket is fixedly connected to the inner wall of the groove, and the outer diameter of the sealing gasket is equal to the outer diameter of the limiting ring.

[0021] Through the above technical solution: when the flange plate 1 is engaged with the limiting ring on the connecting sleeve, the sealing gasket is squeezed between the two to form a sealed structure to prevent gas or liquid from leaking from the connecting part.

[0022] As a further description of the above technical solution:

[0023] A sealing ring is fixedly connected to the top of the flange plate 1, and the top ends of the plurality of bolts pass through the sealing ring.

[0024] Through the above technical solution: the sealing ring mainly plays the role of further enhancing the sealing performance and preventing the fluid in the pipeline from leaking at the flange connection.

[0025] As a further description of the above technical solution:

[0026] A plurality of anti-slip grooves are provided around the outer wall of the connector, and the plurality of anti-slip grooves are arranged equidistantly around the outer wall of the connector.

[0027] Through the above technical solution: the anti-slip groove can prevent hands or tools from slipping, making operation more convenient and stable.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the present invention, the rubber pad absorbs the tiny displacement of the pipe head caused by external force, reduces the stress concentration between the pipe head and the pipe wall, and thus improves the fatigue resistance of the component. The rubber pad can prevent gas or liquid leakage, and the rubber sleeve provides protection for the end of the pipe wall to prevent the end from being squeezed by external objects and causing rupture. At the same time, the tapered hose can share the torsion when the connection between the pipe wall and the pipe head is bent, thereby solving the problem of the corrugated pipe end becoming fatigued and ruptured due to repeated bending.

[0030] 2. In the present invention, the connecting sleeve is threadedly connected to the connecting head. When connecting external equipment, the flange one is rotated to adjust the connection direction to avoid rotation of the pipe wall and reduce the torque of the pipe wall. When the flange two is connected to other pipes, the bolts enable the flange one and the flange two to be tightly connected together. By tightening the nut, the pre-tightening force of the bolt can be increased, thereby improving the reliability of the connection, so that other pipes can be connected, thereby improving the practicality of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional diagram of a fatigue-resistant and pressure-resistant vacuum bellows assembly proposed by the present invention;

[0032] Figure 2 This is a front view of a fatigue-resistant and pressure-resistant vacuum bellows assembly proposed by the present invention;

[0033] Figure 3 This is a partial structural breakdown diagram of a fatigue-resistant and pressure-resistant vacuum bellows assembly proposed in the present utility model.

[0034] Figure 4 This is a schematic diagram of the connection mechanism of a fatigue-resistant and pressure-resistant vacuum bellows assembly proposed in the present invention;

[0035] Figure 5 This is a schematic diagram of the partial structure of a fatigue-resistant and pressure-resistant vacuum bellows assembly proposed by the utility model.

[0036] Legend:

[0037] 1. Pipe wall; 2. Connecting mechanism; 201. Connecting sleeve; 202. Limiting ring; 203. Flange 1; 204. Groove; 205. Bolt; 206. Flange 2; 3. Pipe head; 4. Rubber pad; 5. Retaining ring; 6. Conical hose; 7. Threaded sleeve; 8. Connecting head; 9. Threaded groove; 10. Snap ring; 11. Rubber sleeve; 12. Rubber ring; 13. Nut; 14. Cross groove; 15. Sealing gasket; 16. Sealing ring; 17. Anti-slip groove. DETAILED DESCRIPTION

[0038] 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 present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 3 and Figure 4 The utility model provides an embodiment: a fatigue-resistant and pressure-resistant vacuum bellows assembly, including a pipe wall 1, which serves as a fluid conveying channel. The top of the pipe wall 1 is fixedly connected to a pipe head 3, which provides an installation position for the connector. The outer wall of the pipe head 3 is fixedly connected to a rubber pad 4, and the bottom end of the rubber pad 4 is fixedly connected to the pipe wall 1. The rubber pad 4 has good elasticity and sealing, and can absorb the pressure between the pipe head 3 and the pipe wall 1 when the pipe wall 1 is bent. The top of the outer wall of the pipe head 3 is fixedly connected to a fixing ring 5, which provides a connection for the rubber pad 4 and other components. The inner wall of the fixing ring 5 is fixedly connected to a conical hose 6, which extends into the interior of the pipe wall 1 and provides support for its end when the pipe wall 1 is bent to prevent the pipe wall 1 from breaking due to excessive bending. The outer wall of the fixing ring 5 is fixedly connected to a threaded sleeve 7, which serves as a threaded connection. The function of other components is to use threaded connection for easy disassembly. The outer wall of the threaded sleeve 7 is threadedly connected with a connector 8, which is mainly used to connect other components. A threaded groove 9 is provided on the upper side of the inner wall of the connector 8. The threaded groove 9 provides connection for other components, and a connecting mechanism 2 is provided inside the connector 8; the outer wall of the rubber pad 4 is fixedly connected with a clamping ring 10, which plays a positioning role. A rubber sleeve 11 is provided on the outside of the rubber pad 4, and the rubber sleeve 11 is engaged with the clamping ring 10 and the pipe wall 1. The rubber sleeve 11 can provide protection for the connection between the pipe wall 1 and the rubber pad 4 to prevent damage to the connection caused by external objects squeezing; a rubber ring 12 is fixedly connected to the bottom of the outer wall of the tapered hose 6, and the outer diameter of the rubber ring 12 is equal to the inner diameter of the pipe wall 1. The rubber ring 12 has high resilience and fits with the pipe wall 1 after rebounding after entering the pipe wall 1 to prevent the pipe wall 1 from excessive bending;

[0040] Specifically, the pipe wall 1 has good sealing performance and is used to transport the medium. The pipe head 3 plays a connecting role. When the pipe head 3 is subjected to external force and produces a small displacement, the rubber pad 4 can undergo elastic deformation to absorb these displacements, reducing the stress concentration between the pipe head 3 and the pipe wall 1, thereby improving the fatigue resistance of the component. The rubber pad 4 itself has good sealing performance and can prevent gas or liquid from leaking from the connection between the pipe head 3 and the pipe wall 1. The rubber sleeve 11 is engaged with the rubber pad 4 and the pipe wall 1 to provide protection for the end of the pipe wall 1 and prevent the end from being squeezed by external objects and causing rupture. The fixing ring 5 plays a role in The function of connecting the lower and upper components is that the tapered hose 6 passes through the pipe head 3 and extends into the interior of the pipe wall 1. When the connection between the pipe wall 1 and the pipe head 3 is bent, the tapered hose 6 can share the force of the external force on the pipe wall 1, preventing the end of the pipe wall 1 from excessive bending and causing rupture. The rubber ring 12 is close to the inner wall of the pipe wall 1, increasing the friction between the tapered hose 6 and the pipe wall 1, and further strengthening the support of the tapered hose 6 on the pipe wall 1. The threaded sleeve 7 is threadedly connected to the connector 8, making the connector 8 more firmly fixed and easy to replace. The threaded groove 9 above the inner wall of the connector 8 is used to connect other pipes.

[0041] Reference Figure 1 、 Figure 4 and Figure 5 The connecting mechanism 2 includes a connecting sleeve 201, which plays an extension role to facilitate the connection of other components. The connecting sleeve 201 is threadedly connected to the upper side of the inner wall of the connecting head 8. The top of the outer wall of the connecting sleeve 201 is fixedly connected to the limiting ring 202, which plays a limiting role. The outer wall of the connecting sleeve 201 is slidably connected with a flange 203. The top of the outer wall of the flange 203 is provided with a groove 204, which is engaged with the limiting ring 202. The limiting ring 202 is engaged with the groove 204, so that the height of the flange 203 is consistent with that of the limiting ring 202, ensuring that no gap is generated during the connection, resulting in medium outflow. The top of the flange 203 is threaded with multiple bolts 205 all around, and the bolts 205 play a role in connecting other The function of the components is that the top of the outer wall of the multiple bolts 205 is threadedly connected to the flange 206, and the flange 206 can be tightly fitted with the flange 1 203 through the bolts 205; the top of the outer wall of the multiple bolts 205 is threadedly connected to the nut 13, and the pre-tightening force of the bolt 205 can be increased by tightening the nut 13. The bottom of the multiple bolts 205 is provided with a cross groove 14, which is convenient for installation and removal using tools; the inner wall of the groove 204 is fixedly connected to the sealing gasket 15, and the outer diameter of the sealing gasket 15 is equal to the outer diameter of the limiting ring 202. When the flange 1 203 is engaged with the limiting ring 202 on the connecting sleeve 201, the sealing gasket 15 is squeezed between the two to form a sealed structure to prevent gas or liquid from leaking from the connection part;

[0042] Specifically, when the pipe to be connected does not match the thread groove 9, a flange connection can be used. A threaded connection is used between the connecting sleeve 201 and the connecting head 8, which can withstand a certain amount of tension and pressure. The limiting ring 202 is used to limit the moving distance of the flange 1 203, and at the same time facilitates the fixing of the flange 1 203. The flange 1 203 is rotatably connected to the connecting sleeve 201. The flange 1 203 can be rotated when connecting external equipment to avoid rotation of the pipe wall 1 and reduce the torque of the pipe wall 1. The limiting ring 202 is engaged with the groove 204, and the sealing gasket 15 is squeezed between the two to form a sealed structure to prevent gas or liquid from leaking from the connection part. When the flange 206 is connected to other pipes, the bolt 205 enables the flange 1 203 and the flange 2 206 to be tightly connected together to withstand the pressure and external force inside the pipe. During the installation process, the pre-tightening force of the bolt 205 can be increased by tightening the nut 13, thereby improving the reliability of the connection.

[0043] Reference Figure 2 and Figure 4 , a sealing ring 16 is fixedly connected to the top of the flange 203, and the top ends of multiple bolts 205 all pass through the sealing ring 16. The sealing ring 16 mainly plays the role of further enhancing the sealing performance and preventing the fluid in the pipeline from leaking at the flange connection; a plurality of anti-skid grooves 17 are opened around the outer wall of the connector 8, and the plurality of anti-skid grooves 17 are equidistantly arranged around the outer wall of the connector 8. The anti-skid grooves 17 are mainly to provide better friction when installing and removing the connector 8;

[0044] Specifically, the sealing ring 16 at the top of flange 1 203 primarily enhances sealing performance, preventing fluid leakage from the pipeline at the flange connection. The multiple anti-skid grooves 17 around the outer wall of connector 8 primarily provide improved friction during installation and removal of connector 8. These grooves prevent hands or tools from slipping, making operation more convenient and stable. The equally spaced anti-skid grooves 17 evenly distribute friction, ensuring a good anti-skid effect in all directions.

[0045] Working principle: Before using the device, the pipe wall 1 and the fixing ring 5 are connected by the rubber pad 4. When the pipe head 3 is subjected to external force and produces a small displacement, the rubber pad 4 can undergo elastic deformation to absorb these displacements, reduce the stress concentration between the pipe head 3 and the pipe wall 1, and thus improve the fatigue resistance of the component. The sealing performance of the rubber pad 4 itself can prevent gas or liquid leakage. The rubber sleeve 11 provides protection for the end of the pipe wall 1 to prevent the end from being squeezed by external objects and causing rupture. When the connection between the pipe wall 1 and the pipe head 3 is bent, the tapered hose 6 can share the external force on the pipe wall 1 to prevent the end of the pipe wall 1 from being excessively bent and causing rupture. The rubber ring 12 is close to the inner wall of the pipe wall 1, increasing the friction between the tapered hose 6 and the pipe wall 1, and further strengthening the support of the tapered hose 6 on the pipe wall 1. The threaded sleeve 7 is threadedly connected to the connector 8, making the connector 8 more firmly fixed and easy to replace. The connector 8 The threaded groove 9 above the inner wall is used to connect other pipes; and the flange 1 203 can be used to connect pipes that are not compatible with the threaded groove 9. The connecting sleeve 201 and the connecting head 8 are connected by a threaded connection, which can withstand a certain amount of tension and pressure. The flange 1 203 is rotatably connected to the connecting sleeve 201. The flange 1 203 can be rotated to adjust the connection direction when connecting external equipment to avoid rotation of the pipe wall 1 and reduce the torque of the pipe wall 1. The limiting ring 202 is engaged with the groove 204, and the sealing gasket 15 is squeezed between the two to form a sealed structure to prevent gas or liquid from leaking from the connection part. When the flange 206 is connected to other pipes, the bolt 205 enables the flange 1 203 and the flange 2 206 to be tightly connected together to withstand the pressure and external force inside the pipe. By tightening the nut 13, the pre-tightening force of the bolt 205 can be increased to improve the reliability of the connection.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fatigue-resistant and pressure-resistant vacuum bellows assembly, comprising a tube wall (1), characterized in that: The top of the tube wall (1) is fixedly connected to a tube head (3), the outer wall of the tube head (3) is fixedly connected to a rubber pad (4), the bottom end of the rubber pad (4) is fixedly connected to the tube wall (1), the top of the outer wall of the tube head (3) is fixedly connected to a fixing ring (5), the inner wall of the fixing ring (5) is fixedly connected to a conical hose (6), the outer wall of the fixing ring (5) is fixedly connected to a threaded sleeve (7), the outer wall of the threaded sleeve (7) is threadedly connected to a connector (8), a threaded groove (9) is provided on the upper side of the inner wall of the connector (8), and a connecting mechanism (2) is provided inside the connector (8).

2. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 1, characterized in that: The connecting mechanism (2) includes a connecting sleeve (201), the connecting sleeve (201) is threadedly connected to the upper side of the inner wall of the connecting head (8), the top of the outer wall of the connecting sleeve (201) is fixedly connected to a limiting ring (202), the outer wall of the connecting sleeve (201) is slidably connected to a flange plate 1 (203), the top of the outer wall of the flange plate 1 (203) is provided with a groove (204), the groove (204) is engaged with the limiting ring (202), the top of the flange plate 1 (203) is threadedly connected to multiple bolts (205) around, and the top of the outer wall of the multiple bolts (205) is threadedly connected to a flange plate 2 (206).

3. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 1, characterized in that: A clamping ring (10) is fixedly connected to the outer wall of the rubber pad (4), and a rubber sleeve (11) is provided on the outer side of the rubber pad (4). The rubber sleeve (11) is engaged with the clamping ring (10) and the pipe wall (1).

4. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 1, characterized in that: A rubber ring (12) is fixedly connected to the bottom of the outer wall of the conical hose (6), and the outer diameter of the rubber ring (12) is equal to the inner diameter of the tube wall (1).

5. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 2, characterized in that: The tops of the outer walls of the plurality of bolts (205) are all threadedly connected with nuts (13), and the bottoms of the plurality of bolts (205) are all provided with cross slots (14).

6. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 2, characterized in that: A sealing gasket (15) is fixedly connected to the inner wall of the groove (204), and the outer diameter of the sealing gasket (15) is equal to the outer diameter of the limiting ring (202).

7. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 2, characterized in that: The top of the flange (203) is fixedly connected to a sealing ring (16), and the top ends of the plurality of bolts (205) all pass through the sealing ring (16).

8. The fatigue-resistant and pressure-resistant vacuum bellows assembly according to claim 1, characterized in that: A plurality of anti-slip grooves (17) are provided around the outer wall of the connector (8), and the plurality of anti-slip grooves (17) are arranged at equal intervals around the outer wall of the connector (8).

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