A high-pressure, large-diameter constrained flexible compensation joint

Abstract

The present invention provides a high-pressure, large-diameter, constrained, flexible compensating joint, comprising a main body assembly and a flexible compensating joint. The main body assembly comprises a first end tube and a second end tube, and at least three bellows are included between the first and second end tubes. The flexible compensating joint comprises at least three universal hinge structures with limiting devices, the universal hinge structures comprising a universal ring assembly, a pin assembly, and a hinge plate assembly. Four pin assemblies are provided on the universal ring assembly, and the four pin assemblies are evenly distributed on the universal ring assembly. The universal ring assembly is connected to the universal ring assembly on one adjacent side via an upper first pin assembly, a lower second pin assembly, and a hinge plate assembly. The universal ring assembly is connected to the universal ring assembly on the other adjacent side via a front third pin assembly, a rear fourth pin assembly, and a hinge plate assembly. The high-pressure, large-diameter, constrained, flexible compensating joint described in the present invention has low rigidity and is suitable for flexible compensation of high-pressure, large-diameter pipelines in confined spaces.

Description

Technical Field

[0001] The present invention relates to the field of metal hoses and metal bellows expansion joints, and in particular to a high-pressure, large-diameter, constrained, flexible compensating joint. Background Art

[0002] The existing metal hose compensation method is flexible and convenient, but its shortcomings are that it is limited by the pressure-bearing capacity of the bellows, the insufficient restraint of the external force-bearing wire mesh and the manufacturing level. It cannot effectively restrain the pressure thrust generated by the bellows and cannot be used for compensation of high-pressure large-diameter pipe sections.

[0003] However, the conventional constrained metal bellows expansion joint used for compensating high-pressure large-diameter pipe sections also has the disadvantages of large external dimensions and high rigidity.

[0004] Patent application number CN201320771181.9 discloses a bellows-type universal joint, comprising a connecting pipe, a hinge ring, a universal ring, a pin, and a bellows. The bellows is welded to the connecting pipes at both ends, and the hinge rings are fixed to the connecting pipes. A universal ring is positioned between the two hinge rings, and the two hinge rings and the universal ring are connected by a pin to form a universal joint. While this patent offers light weight and a long lifespan, it suffers from high rigidity and cannot be used for compensating high-pressure, large-diameter pipe sections.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of the present invention is to propose a high-pressure large-diameter constrained flexible compensation joint to solve the problems in the prior art that the bellows-type universal joint has high rigidity and conventional metal hoses cannot be used for compensation of high-pressure large-diameter pipe sections.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] A high-pressure, large-diameter, constrained, flexible compensating joint, comprising a main body assembly and a flexible compensating assembly. The flexible compensating assembly is disposed around the outside of the main body assembly.

[0009] The main body assembly includes a first end pipe and a second end pipe, at least three corrugated pipes are provided between the first end pipe and the second end pipe, and an intermediate pipe is provided between two adjacent corrugated pipes.

[0010] One end of the flexible compensation component is fixedly connected to the first end tube, and the other end of the flexible compensation component is fixedly connected to the second end tube.

[0011] The flexible compensation assembly includes at least three universal hinge structures, the number of which is equal to the number of bellows, the universal hinge structure includes a universal ring assembly, a pin assembly and a hinge plate assembly, the universal ring assembly is arranged around the outside of the bellows, the hinge plate assembly is connected to the universal ring assembly through the pin assembly, four pin assemblies are arranged on the universal ring assembly, and the four pin assemblies are evenly distributed on the universal ring assembly, and the four pin assemblies are an upper pin first assembly, a lower pin second assembly, a front pin third assembly and a rear pin fourth assembly.

[0012] The universal ring assembly is connected to the universal ring assembly on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the hinge plate assembly. The universal ring assembly is connected to the universal ring assembly on the adjacent other side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the hinge plate assembly. Limiting devices are provided on the universal ring assemblies, and the limiting devices are provided on both sides of the hinge plate assembly.

[0013] The high-pressure, large-diameter constrained flexible compensating joint described in the present invention has, on the one hand, low rigidity; and, on the other hand, is suitable for flexible compensation of high-pressure, large-diameter pipelines in narrow spaces.

[0014] Furthermore, the universal ring assembly includes an end universal ring assembly and a middle universal ring assembly, and the hinge plate assembly includes a long hinge plate assembly and a short hinge plate assembly;

[0015] The middle universal ring assembly is connected to the universal ring assembly on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the long hinge plate assembly. The middle universal ring assembly is connected to the universal ring assembly on the adjacent other side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the long hinge plate assembly.

[0016] The end universal joint assembly ring is connected to the middle universal joint ring assembly on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the long hinge plate assembly, and the end universal joint ring assembly is connected to the first end tube or the second end tube on the other adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the short hinge plate assembly.

[0017] Furthermore, the end universal ring assembly includes a first end universal ring and a second end universal ring, the short hinge plate assembly includes a first short hinge plate and a second short hinge plate, and a first end force-bearing ring plate is arranged on the first end tube, one end of the first end force-bearing ring plate is fixedly connected to the first end tube, and the other end of the first end force-bearing ring plate is connected to the first end universal ring through the first short hinge plate.

[0018] Furthermore, a second end stress ring plate is provided on the second end tube, one end of the second end stress ring plate is fixedly connected to the second end tube, and the other end of the second end stress ring plate is connected to the second end universal ring through a second short hinge plate.

[0019] Furthermore, an intermediate stress-bearing ring plate is provided on the outer side of each intermediate tube, one end of the intermediate stress-bearing ring plate is fixedly connected to the intermediate tube, and the other end of the intermediate stress-bearing ring plate is fixedly connected to the long hinge plate assembly.

[0020] Furthermore, the limiting device includes a first limiting protrusion and a second limiting protrusion, and a deflection space is set between the first limiting protrusion or the second limiting protrusion and the hinge plate assembly.

[0021] Furthermore, a reinforcement device is provided on the outside of the corrugated tube.

[0022] Furthermore, the reinforcement device is configured as a reinforcement ring.

[0023] Furthermore, three bellows are included between the first end tube and the second end tube, and the flexible compensation component includes three universal hinge structures.

[0024] Furthermore, seven bellows are included between the first end tube and the second end tube, and the flexible compensation component includes seven universal hinge structures.

[0025] Compared with the prior art, the high-pressure, large-diameter, constrained, flexible compensating joint described in the present invention has the following beneficial effects:

[0026] The high-pressure, large-diameter constrained flexible compensating joint described in the present invention is based on the principle of coordinated deformation of bellows and universal hinge structures. Through the ingenious combination design of bellows and universal hinge structures, combined with a limit device and an intermediate force ring plate, the flexible compensating joint can produce a broken line deformation around the pin assembly according to the displacement direction. The flexible compensating joint takes the pin assembly as the center and adds the function of a universal ring. The broken line combination absorbs displacement in any direction. The universal hinge structure is interlocked to effectively constrain the pressure thrust of the bellows, so that the flexible joint of the invention has the compensation functions of both metal hoses and expansion joints. It can effectively absorb and compensate for the axial, lateral, and angular multi-directional displacements of any pipe section and has a smaller external size and stiffness, effectively reducing the stress of high-pressure pipelines and equipment pipe mouths, and is suitable for flexible compensation of high-pressure, large-diameter pipelines in narrow spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a high-pressure, large-diameter, constrained, flexible compensating joint according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. First end tube; 11. First end stress ring plate; 12. First short hinge plate; 2. Second end tube; 21. Second end stress ring plate; 22. Second short hinge plate; 3. Bellows; 31. Reinforcement device; 4. Universal ring assembly; 41. End universal ring assembly; 411. First end universal ring; 412. Second end universal ring; 42. Middle universal ring assembly; 5. Pin assembly; 7. Middle stress ring plate; 8. Middle tube; 9. Long hinge plate assembly; 10. Limiting device; 101. First limiting protrusion; 102. Second limiting protrusion; 103. Deflection space. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] Example 1

[0033] This embodiment proposes a high-pressure, large-diameter, constrained, flexible compensating joint, such as Figure 1 As shown, the high-pressure large-diameter constrained flexible compensation joint includes a main body component and a flexible compensation component. The flexible compensation component is arranged around the outside of the main body component.

[0034] The main body assembly includes a first end pipe 1 and a second end pipe 2. At least three corrugated pipes 3 are provided between the first end pipe 1 and the second end pipe 2. An intermediate pipe 8 is provided between two adjacent corrugated pipes 3.

[0035] One end of the flexible compensation component is fixedly connected to the first end tube 1, and the other end of the flexible compensation component is connected to the second end tube 2.

[0036] The flexible compensation component includes at least three universal hinge structures, the number of which is equal to the number of the bellows 3, and the universal hinge structures are arranged around the outside of the main body component.

[0037] The universal hinge structure includes a universal ring assembly 4, a pin assembly 5 and a hinge plate assembly. The universal ring assembly 4 is arranged around the outside of the bellows 3. The hinge plate assembly is connected to the universal ring assembly 4 through the pin assembly 5. Four pin assemblies 5 are arranged on the universal ring assembly 4. The four pin assemblies 5 are evenly distributed on the universal ring assembly 4. The four pin assemblies 5 are an upper pin first assembly, a lower pin second assembly, a front pin third assembly and a rear pin fourth assembly. The line connecting the upper pin first assembly and the lower pin second assembly is perpendicular to the line connecting the front pin third assembly and the rear pin fourth assembly.

[0038] The universal ring assembly 4 is connected to the universal ring assembly 4 on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the hinge plate assembly, and the universal ring assembly 4 is connected to the universal ring assembly 4 on the other adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the hinge plate assembly; a limit device 10 is provided on the universal ring assembly 4, and the limit device 10 is provided on both sides of the hinge plate assembly.

[0039] The limiting device 10 can ensure that the displacement of each bellows 3 is balanced and the bellows 3 will not produce excessive deformation.

[0040] The high-pressure, large-diameter constrained flexible compensation joint described in this embodiment is based on the principle of coordinated deformation of the bellows 3 and the universal hinge structure. Through the clever combination design of the bellows 3 and the universal hinge structure, combined with the limit device 10, as the temperature rises, the high-pressure pipeline produces thermal expansion, and the flexible compensation joint can produce a broken line deformation around the pin assembly 5 according to the displacement direction. The flexible compensation joint is centered on the pin assembly 5 and adds the function of a universal ring. The broken line combination absorbs displacement in any direction, and the universal hinge structure is interlocked to effectively constrain the pressure thrust of the bellows 3, so that the flexible joint of the invention has the compensation function of both the metal hose and the expansion joint, and can effectively absorb and compensate for the axial, lateral, angular and multi-directional displacement of any pipe section and has a smaller external size and rigidity, effectively reducing the stress of the high-pressure pipeline and the pipe mouth of the equipment, and is suitable for flexible compensation of high-pressure, large-diameter pipelines in narrow spaces.

[0041] Specifically, the universal ring assembly 4 includes an end universal ring assembly 41 and a middle universal ring assembly 42, and the hinge plate assembly includes a long hinge plate assembly 9 and a short hinge plate assembly;

[0042] The middle universal ring assembly 42 is connected to the universal ring assembly 4 on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the long hinge plate assembly 9. The middle universal ring assembly 42 is connected to the universal ring assembly 4 on the adjacent other side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the long hinge plate assembly 9.

[0043] The end universal ring assembly 41 is connected to the middle universal ring assembly 42 on the adjacent side through the upper pin shaft first assembly, the lower pin shaft second assembly, and the long hinge plate assembly 9, and the end universal ring assembly 41 is connected to the first end tube 1 or the second end tube 2 on the adjacent other side through the front pin shaft third assembly, the rear pin shaft fourth assembly, and the short hinge plate assembly.

[0044] Specifically, the end universal ring assembly 41 includes a first end universal ring 411 and a second end universal ring 412, the short hinge plate assembly includes a first short hinge plate 12 and a second short hinge plate 22, and a first end force-bearing ring plate 11 is arranged on the first end tube 1, one end of the first end force-bearing ring plate 11 is fixedly connected to the first end tube 1, and the other end of the first end force-bearing ring plate 11 is connected to the first end universal ring 411 through the first short hinge plate 12.

[0045] Specifically, a second end stress ring plate 21 is provided on the second end tube 2, one end of the second end stress ring plate 21 is fixedly connected to the second end tube 2, and the other end of the second end stress ring plate 21 is connected to the second end universal ring 412 through a second short hinge plate 22.

[0046] More specifically, the second short hinge plate 22 is welded to the first end stress-bearing ring plate 11 , and the second short hinge plate 22 is welded to the second end stress-bearing ring plate 21 .

[0047] The welding connection is relatively firm, which effectively restrains the pressure thrust generated by the bellows 3 under high pressure and improves the reliability of the flexible compensation joint.

[0048] Specifically, an intermediate stress-bearing ring plate 7 is provided on the outer side of each intermediate tube 8 , one end of the intermediate stress-bearing ring plate 7 is fixedly connected to the intermediate tube 8 , and the other end of the intermediate stress-bearing ring plate 7 is fixedly connected to the long hinge plate assembly 9 .

[0049] The provision of the intermediate force-bearing ring plate 7 can effectively restrain the pressure thrust generated by the bellows 3 under high pressure, thereby preventing the bellows 3 from excessive deformation.

[0050] More specifically, one end of the middle stress-bearing ring plate 7 is welded to the middle tube 8 , and the other end of the middle stress-bearing ring plate 7 is welded to the long hinge plate assembly 9 .

[0051] The welding connection is relatively firm, which effectively restrains the pressure thrust generated by the bellows 3 under high pressure and improves the reliability of the flexible compensation joint.

[0052] Specifically, the limiting device 10 includes a first limiting protrusion 101 and a second limiting protrusion 102 , and a deflection space 103 is provided between the first limiting protrusion 101 or the second limiting protrusion 102 and the hinge plate assembly.

[0053] This setting makes it easier for the flexible compensation joint to deflect the hinge plate assembly around the pin assembly 5 to produce a broken line deformation when the temperature rises and the high-pressure pipeline expands. Combined with the effect of the universal ring assembly 4, the broken line combination absorbs displacement in any direction.

[0054] Specifically, a reinforcement device 31 is provided on the outer side of the bellows 3 .

[0055] The reinforcing device 31 improves the reliability of the flexible compensating joint, increases the pressure that the flexible compensating joint can withstand, and enables the flexible compensating joint to be used under high pressure.

[0056] Specifically, the reinforcing device 31 is not specifically limited.

[0057] More specifically, in this embodiment, the reinforcement device 31 is configured as a reinforcement ring.

[0058] Specifically, such as Figure 1 As shown, in this embodiment, seven bellows 3 are included between the first end tube 1 and the second end tube 2, and the flexible compensation component includes seven universal hinge structures.

[0059] This setting greatly improves the flexibility of high-pressure, large-diameter constrained joints, allowing flexible compensation joints to be used in situations where the pipe section is long, the temperature is high, and the displacement compensation amount is large. It can effectively absorb and compensate for the axial, lateral, and angular multi-directional displacements of any pipe section and has smaller overall dimensions and rigidity, effectively reducing the stress on the pipe ends of high-pressure pipelines and equipment, and is suitable for flexible compensation of high-pressure, large-diameter pipelines in narrow spaces.

[0060] The high-pressure, large-diameter constrained flexible compensation joint described in this embodiment is based on the principle of coordinated deformation of the bellows 3 and the universal hinge structure. Through the ingenious combination design of the bellows 3 and the universal hinge structure, combined with the limit device 10 and the intermediate force ring plate 7, the various structures are interrelated and inseparable. As the temperature rises, the high-pressure pipeline produces thermal expansion, and the flexible compensation joint can produce a broken line deformation around the pin assembly 5 according to the displacement direction. The flexible compensation joint takes the pin assembly 5 as the center and adds the function of the universal ring. The broken line combination absorbs displacement in any direction, and the universal hinge structure is linked together to effectively constrain the pressure thrust of the bellows 3, so that the flexible joint of the invention has the compensation function of both the metal hose and the expansion joint, and can effectively absorb and compensate the axial, lateral, angular and multi-directional displacement of any pipe section and has a smaller external size and stiffness, effectively reducing the stress of the high-pressure pipeline and the equipment pipe mouth, and is suitable for flexible compensation of high-pressure, large-diameter pipelines in narrow spaces.

[0061] The high-pressure, large-diameter constrained flexible compensation joint described in this embodiment can be used under conditions where the pressure is greater than 4 MPa and the diameter is greater than 600 mm.

[0062] Example 2

[0063] Specifically, in this embodiment, different from Embodiment 1, three bellows 3 are included between the first end tube 1 and the second end tube 2, and the flexible compensation component includes three universal hinge structures.

[0064] The high-pressure, large-diameter, constrained, flexible compensating joint described in this embodiment is suitable for use in situations where the pipe section is short and the displacement is small.

[0065] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A high-pressure, large-diameter, constrained, flexible compensating joint, characterized in that: The high-pressure large-diameter constrained flexible compensation joint includes a main body component and a flexible compensation component. The flexible compensation component is arranged around the outside of the main body component. The main pipe assembly comprises a first end pipe (1) and a second end pipe (2), at least three corrugated pipes (3) are provided between the first end pipe (1) and the second end pipe (2), and an intermediate pipe (8) is provided between two adjacent corrugated pipes (3). One end of the flexible compensation component is fixedly connected to the first end tube (1), and the other end of the flexible compensation component is fixedly connected to the second end tube (2). The flexible compensation component comprises at least three universal hinge structures, and the number of the universal hinge structures is equal to the number of the bellows (3). The universal hinge structure comprises a universal ring assembly (4), a pin assembly (5) and a hinge plate assembly. The universal ring assembly (4) is arranged around the outside of the bellows (3). The hinge plate assembly is connected to the universal ring assembly (4) through the pin assembly (5). Four pin assemblies (5) are arranged on the universal ring assembly (4). The four pin assemblies (5) are evenly distributed on the universal ring assembly (4). The four pin assemblies (5) are an upper pin first assembly, a lower pin second assembly, a front pin third assembly and a rear pin fourth assembly. The universal ring assembly (4) is connected to the universal ring assembly (4) on one adjacent side via a first upper pin assembly, a second lower pin assembly, and a hinge plate assembly; the universal ring assembly (4) is connected to the universal ring assembly (4) on the other adjacent side via a third front pin assembly, a fourth rear pin assembly, and a hinge plate assembly; and a limiting device (10) is provided on each of the universal ring assemblies (4), and the limiting device (10) is provided on both sides of the hinge plate assembly.

2. A high-pressure, large-diameter, constrained, flexible compensating joint according to claim 1, characterized in that: The universal ring assembly (4) includes an end universal ring assembly (41) and a middle universal ring assembly (42); the hinge plate assembly includes a long hinge plate assembly (9) and a short hinge plate assembly; The middle universal ring assembly (42) is connected to the universal ring assembly (4) on one side adjacent to the vehicle through the first upper pin assembly, the second lower pin assembly, and the long hinge plate assembly (9); the middle universal ring assembly (42) is connected to the universal ring assembly (4) on the other side adjacent to the vehicle through the third front pin assembly, the fourth rear pin assembly, and the long hinge plate assembly (9); The end universal ring assembly (41) is connected to the middle universal ring assembly (42) on the adjacent side via the first upper pin assembly, the second lower pin assembly, and the long hinge plate assembly (9); the end universal ring assembly (41) is connected to the first end tube (1) or the second end tube (2) on the adjacent other side via the third front pin assembly, the fourth rear pin assembly, and the short hinge plate assembly.

3. A high-pressure, large-diameter, constrained, flexible compensating joint according to claim 2, characterized in that: The end universal ring assembly (41) includes a first end universal ring (411) and a second end universal ring (412); the short hinge plate assembly includes a first short hinge plate (12) and a second short hinge plate (22); a first end stress-bearing ring plate (11) is provided on the first end tube (1); one end of the first end stress-bearing ring plate (11) is fixedly connected to the first end tube (1); and the other end of the first end stress-bearing ring plate (11) is connected to the first end universal ring (411) via the first short hinge plate (12).

4. A high-pressure, large-diameter, constrained, flexible compensating joint according to claim 3, characterized in that: A second end stress-bearing ring plate (21) is provided on the second end tube (2); one end of the second end stress-bearing ring plate (21) is fixedly connected to the second end tube (2); and the other end of the second end stress-bearing ring plate (21) is connected to the second end universal ring (412) via a second short hinge plate (22).

5. A high-pressure, large-diameter, constrained, flexible compensating joint according to claim 4, characterized in that: An intermediate stress-bearing ring plate (7) is provided on the outside of each intermediate tube (8), one end of the intermediate stress-bearing ring plate (7) is fixedly connected to the intermediate tube (8), and the other end of the intermediate stress-bearing ring plate (7) is fixedly connected to the long hinge plate assembly (9).

6. A high-pressure, large-diameter, constrained, flexible compensating joint according to claim 1, characterized in that: The limiting device (10) comprises a first limiting protrusion (101) and a second limiting protrusion (102); a deflection space (103) is provided between the first limiting protrusion (101) or the second limiting protrusion (102) and the hinge plate assembly.

7. The high-pressure, large-diameter, constrained, flexible compensating joint according to claim 1, characterized in that: A reinforcement device (31) is provided on the outside of the corrugated tube (3).

8. The high-pressure, large-diameter, constrained, flexible compensating joint according to claim 7, characterized in that: The reinforcing device (31) is configured as a reinforcing ring.

9. The high-pressure, large-diameter, constrained, flexible compensating joint according to claim 1, characterized in that: Three bellows (3) are included between the first end tube (1) and the second end tube (2), and the flexible compensation component includes three universal hinge structures.

10. The high-pressure, large-diameter, constrained, flexible compensating joint according to claim 1, characterized in that: Seven bellows (3) are included between the first end tube (1) and the second end tube (2), and the flexible compensation component includes seven universal hinge structures.

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