CN220551653U - High-pressure large-caliber constraint type flexible compensation joint - Google Patents
High-pressure large-caliber constraint type flexible compensation joint Download PDFInfo
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- CN220551653U CN220551653U CN202321673417.5U CN202321673417U CN220551653U CN 220551653 U CN220551653 U CN 220551653U CN 202321673417 U CN202321673417 U CN 202321673417U CN 220551653 U CN220551653 U CN 220551653U
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- 230000035882 stress Effects 0.000 description 28
- 238000006073 displacement reaction Methods 0.000 description 14
- 239000002184 metal Substances 0.000 description 8
- 230000007547 defect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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Abstract
The utility model provides a high-pressure large-caliber constraint type flexible compensation joint which comprises a main pipe body assembly and a flexible compensation assembly, wherein the main pipe body assembly comprises a first end pipe and a second end pipe, at least three corrugated pipes are arranged between the first end pipe and the second end pipe, the flexible compensation assembly comprises at least three universal hinge structures with limiting devices, each universal hinge structure comprises a universal ring assembly, a pin shaft assembly and a hinge plate assembly, four pin shaft assemblies are arranged on each universal ring assembly and uniformly distributed on each universal ring assembly, each universal ring assembly is connected with the universal ring assembly on the adjacent side through an upper pin shaft first assembly, a lower pin shaft second assembly and a hinge plate assembly, and each universal ring assembly is connected with the universal ring assembly on the adjacent side through a front pin shaft third assembly, a rear pin shaft fourth assembly and a hinge plate assembly. The high-pressure large-caliber constraint type flexible compensation joint disclosed by the utility model has low rigidity and is suitable for flexible compensation of a high-pressure large-caliber pipeline in a narrow space.
Description
Technical Field
The utility model relates to the field of expansion joints of metal hoses and metal bellows, in particular to a high-pressure large-caliber constraint type flexible compensation joint.
Background
The existing metal hose compensation mode is flexible and convenient, and has the defects of limitation of pressure bearing capacity of the corrugated pipe, insufficient external stress silk screen constraint force and manufacturing level, and can not effectively restrain pressure thrust generated by the corrugated pipe and can not be used for compensating a high-pressure large-caliber pipe section.
The constrained metal bellows expansion joint with the conventional structure for compensating the high-pressure large-caliber pipe section has the defects of large external dimension, large rigidity and the like.
The patent of application number CN201320771181.9 in the prior art discloses a bellows type universal joint, including connecting pipe, hinge ring, universal ring, round pin axle, bellows, wherein bellows both ends respectively with two connecting pipes welded connection, two hinge rings are fixed respectively on two connecting pipes, set up the universal ring between two hinge rings, utilize the round pin axle to connect two hinge rings and universal ring and constitute the universal joint. The patent has the characteristics of light weight and long service life, but has high rigidity; cannot be used for compensating the high-pressure large-caliber pipe section.
In view of this, the present utility model has been made.
Disclosure of Invention
The utility model aims to provide a high-pressure large-caliber constraint type flexible compensation joint, which aims to solve the problems that a bellows type universal joint in the prior art is high in rigidity and a conventional metal hose cannot be used for compensation of a high-pressure large-caliber pipe section.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the high-pressure large-caliber constrained flexible compensation joint comprises a main pipe body assembly and a flexible compensation assembly, wherein the flexible compensation assembly is arranged outside the main pipe body assembly in a surrounding way,
the main pipe body assembly comprises a first end pipe and a second end pipe, at least three corrugated pipes are arranged between the first end pipe and the second end pipe, an intermediate pipe is arranged between two adjacent corrugated pipes,
one end of the flexible compensation component is fixedly connected with the first end pipe, the other end of the flexible compensation component is fixedly connected with the second end pipe,
the flexible compensation component comprises at least three universal hinge structures, the number of the universal hinge structures is equal to that of the corrugated pipes, the universal hinge structures comprise universal ring components, pin shaft components and hinge plate components, the universal ring components are arranged on the outer sides of the corrugated pipes in a surrounding mode, the hinge plate components are connected to the universal ring components through the pin shaft components, four pin shaft components are arranged on the universal ring components and are uniformly distributed on the universal ring components, the four pin shaft components are an upper pin shaft first component, a lower pin shaft second component, a front pin shaft third component and a rear pin shaft fourth component,
the universal ring assembly is connected with 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, and the universal ring assembly is connected with 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; and limiting devices are arranged on the universal ring assembly and are arranged on two sides of the hinge plate assembly.
The high-pressure large-caliber constraint type flexible compensation joint has low rigidity on one hand; on the other hand, the flexible compensation device is suitable for flexible compensation of high-pressure large-caliber pipelines in narrow spaces.
Further, the gimbal assemblies include an end gimbal assembly and a middle gimbal assembly, and the hinge plate assembly includes a long hinge plate assembly and a short hinge plate assembly;
the middle universal ring assembly is connected with 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, and the middle universal ring assembly is connected with 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;
the end universal assembly ring is connected with the middle 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, and the end universal ring assembly is connected with the first end pipe or the second end pipe on the adjacent other side through the front pin shaft third assembly, the rear pin shaft fourth assembly and the short hinge plate assembly.
Further, the end universal ring assembly comprises a first end universal ring and a second end universal ring, the short hinge plate assembly comprises a first short hinge plate and a second short hinge plate, a first end stress ring plate is arranged on the first end pipe, one end of the first end stress ring plate is fixedly connected with the first end pipe, and the other end of the first end stress ring plate is connected with the first end universal ring through the first short hinge plate.
Further, a second end stress ring plate is arranged on the second end pipe, one end of the second end stress ring plate is fixedly connected with the second end pipe, and the other end of the second end stress ring plate is connected with a second end universal ring through a second short hinge plate.
Further, the outer side of each middle pipe is provided with a middle stress ring plate, one end of the middle stress ring plate is fixedly connected with the middle pipe, and the other end of the middle stress ring plate is fixedly connected with the long hinge plate assembly.
Further, the limiting device comprises a first limiting protrusion and a second limiting protrusion, and a deflection space is arranged between the first limiting protrusion or the second limiting protrusion and the hinge plate component.
Further, reinforcing devices are arranged on the outer sides of the corrugated pipes.
Further, the reinforcement means is provided as a reinforcement ring.
Further, three bellows are included between the first and second end pipes, and the flexible compensation assembly includes three universal hinge structures.
Further, seven bellows are included between the first and second end pipes, and the flexible compensation assembly includes seven universal hinge structures.
Compared with the prior art, the high-pressure large-caliber constraint type flexible compensation joint has the following beneficial effects:
the flexible compensation joint can generate fold line deformation around the pin shaft assembly according to the displacement direction by combining the ingenious combination design of the corrugated pipe and the universal hinge structure and the limit device and the middle stress annular plate based on the deformation coordination action principle of the corrugated pipe and the universal hinge structure, the flexible compensation joint takes the pin shaft assembly as the center and the function of the universal ring, the fold line combination absorbs the displacement in any direction, and the universal hinge structure annular buckles to effectively restrict the pressure thrust of the corrugated pipe, so that the flexible joint has the compensation function of a metal hose and an expansion joint, can effectively absorb and compensate the axial, transverse and angular multi-directional displacement of any pipe section, has smaller external dimension and rigidity, effectively reduces the stress of a high-pressure pipeline and an equipment pipe orifice, and is suitable for flexible compensation of a high-pressure large-caliber pipeline in a narrow space.
Drawings
Fig. 1 is a schematic structural diagram of a high-pressure large-caliber constraint type flexible compensation joint according to an embodiment of the utility model.
Reference numerals illustrate:
1. a first end tube; 11. a first end force-bearing annular plate; 12. a first short hinge plate; 2. a second end tube; 21. a second end stressed annular plate; 22. a second short hinge plate; 3. a bellows; 31. a reinforcing means; 4. a gimbal assembly; 41. an end gimbal assembly; 411. a first end gimbal ring; 412. a second end gimbal ring; 42. a middle gimbal assembly; 5. a pin assembly; 7. a middle stress annular plate; 8. a middle tube; 9. a long hinge plate assembly; 10. a limiting device; 101. the first limiting protrusion; 102. the second limiting bulge; 103. deflection space.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The description of "first," "second," etc. in embodiments of the present utility model is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
The embodiment provides a high-pressure large-caliber constraint type flexible compensation joint, as shown in figure 1, which comprises a main pipe body assembly and a flexible compensation assembly, wherein the flexible compensation assembly is arranged outside the main pipe body assembly in a surrounding way,
the main pipe body assembly comprises a first end pipe 1 and a second end pipe 2, at least three corrugated pipes 3 are arranged between the first end pipe 1 and the second end pipe 2, an intermediate pipe 8 is arranged between two adjacent corrugated pipes 3,
one end of the flexible compensation component is fixedly connected with the first end pipe 1, the other end of the flexible compensation component is connected with the second end pipe 2,
the flexible compensation assembly comprises at least three universal hinge structures, the number of the universal hinge structures is equal to that of the corrugated pipes 3, the universal hinge structures are arranged on the outer side of the main pipe body assembly in a surrounding mode,
the universal hinge structure comprises a universal ring component 4, a pin shaft component 5 and a hinge plate component, wherein the universal ring component 4 is arranged on the outer side of the corrugated pipe 3 in a surrounding way, the hinge plate component is connected to the universal ring component 4 through the pin shaft component 5, four pin shaft components 5 are arranged on the universal ring component 4, the four pin shaft components 5 are uniformly distributed on the universal ring component 4, the four pin shaft components 5 are an upper pin shaft first component, a lower pin shaft second component, a front pin shaft third component and a rear pin shaft fourth component, the connecting lines of the upper pin shaft first component and the lower pin shaft second component are perpendicular to the connecting lines of the front pin shaft third component and the rear pin shaft fourth component,
the universal ring assembly 4 is connected with 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 with 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 hinge plate assembly; the universal ring assemblies 4 are provided with limiting devices 10, and the limiting devices 10 are arranged on two sides of the hinge plate assembly.
The limiting device 10 can ensure that the displacement of each corrugated pipe 3 is balanced, and the corrugated pipes 3 cannot deform excessively.
According to the high-pressure large-caliber constraint type flexible compensation joint, based on the deformation coordination action principle of the corrugated pipe 3 and the universal hinge structural member, through the ingenious combination design of the corrugated pipe 3 and the universal hinge structure and the combination of the limiting device 10, along with the temperature rise, the high-pressure pipeline generates thermal expansion, the flexible compensation joint can generate fold line deformation around the pin shaft assembly 5 according to the displacement direction, the flexible compensation joint takes the pin shaft assembly 5 as the center and plays a role of a universal ring, the fold line combination absorbs displacement in any direction, the universal hinge structure ring is buckled with the ring to effectively restrain the pressure thrust of the corrugated pipe 3, so that the flexible joint has the compensation function of a metal hose and an expansion joint, can effectively absorb and compensate axial, transverse and angular multi-directional displacement of any pipe section, has small overall dimension and rigidity, effectively reduces stress of a pipe orifice of a high-pressure pipeline and equipment, and is suitable for flexible compensation of a narrow space high-pressure large-caliber pipeline.
Specifically, gimbal assemblies 4 include end gimbal assemblies 41 and intermediate gimbal assemblies 42, and hinge plate assemblies include long hinge plate assemblies 9 and short hinge plate assemblies;
the middle universal ring assembly 42 is connected with 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, and the middle universal ring assembly 42 is connected with the universal ring assembly 4 on the adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly and the long hinge plate assembly 9;
the end universal ring assembly 41 is connected with 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 with the first end pipe 1 or the second end pipe 2 on the adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly and the short hinge plate assembly.
Specifically, the end gimbal assembly 41 includes a first end gimbal 411 and a second end gimbal 412, and the short hinge plate assembly includes a first short hinge plate 12 and a second short hinge plate 22, where a first end stress ring plate 11 is disposed on the first end pipe 1, one end of the first end stress ring plate 11 is fixedly connected with the first end pipe 1, and the other end of the first end stress ring plate 11 is connected with the first end gimbal 411 through the first short hinge plate 12.
Specifically, a second end stress ring plate 21 is disposed on the second end pipe 2, one end of the second end stress ring plate 21 is fixedly connected with the second end pipe 2, and the other end of the second end stress ring plate 21 is connected with a second end universal ring 412 through a second short hinge plate 22.
More specifically, the second short hinge plate 22 is welded to the first end force receiving ring plate 11, and the second short hinge plate 22 is welded to the second end force receiving ring plate 21.
The welding connection is firm, the pressure thrust generated by the corrugated pipe 3 under high pressure is effectively restrained, and the reliability of the flexible compensation joint is improved.
Specifically, the outer side of each intermediate pipe 8 is provided with an intermediate stress ring plate 7, one end of the intermediate stress ring plate 7 is fixedly connected with the intermediate pipe 8, and the other end of the intermediate stress ring plate 7 is fixedly connected with a long hinge plate assembly 9.
The arrangement of the middle stress ring plate 7 can effectively restrict the pressure thrust generated by the corrugated pipe 3 under high pressure, and avoid excessive deformation of the corrugated pipe 3.
More specifically, one end of the middle stress ring plate 7 is welded with the middle pipe 8, and the other end of the middle stress ring plate 7 is welded with the long hinge plate assembly 9.
The welding connection is firm, the pressure thrust generated by the corrugated pipe 3 under high pressure is effectively restrained, and the reliability of the flexible compensation joint is improved.
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.
When the flexible compensation joint is heated and expanded in the high-pressure pipeline with the temperature rising, the hinge plate component can deflect around the pin shaft component 5 to generate fold line deformation conveniently, and the fold line combination absorbs displacement in any direction under the action of the universal ring component 4.
Specifically, the reinforcing devices 31 are provided on the outer sides of the bellows 3.
The stiffening means 31 increase the reliability of the flexible compensation joint, increasing the pressure that the flexible compensation joint can withstand, so that the flexible compensation joint can be used under high pressure.
Specifically, the reinforcing apparatus 31 is not particularly limited.
More specifically, in the present embodiment, the reinforcement means 31 is provided as a reinforcement ring.
Specifically, as shown in fig. 1, in the present embodiment, seven bellows 3 are included between the first end pipe 1 and the second end pipe 2, and the flexible compensation assembly includes seven universal hinge structures.
The high-pressure large-caliber constraint type joint has the advantages that the flexibility of the high-pressure large-caliber constraint type joint is greatly improved, the flexible compensation joint can be used under the conditions that the pipe section is long and the temperature high-displacement compensation amount is large, axial, transverse and angular multi-directional displacement of any pipe section can be effectively absorbed and compensated, the small overall dimension and the small rigidity are realized, the stress of a high-pressure pipeline and a device pipe orifice is effectively reduced, and the high-pressure large-caliber type joint is suitable for flexible compensation of a high-pressure large-caliber pipeline in a narrow space.
According to the high-pressure large-caliber constraint type flexible compensation joint, based on the deformation coordination action principle of the corrugated pipe 3 and the universal hinge structural member, through the ingenious combination design of the corrugated pipe 3 and the universal hinge structure and the combination of the limiting device 10 and the middle stress annular plate 7, all the structures are mutually related and inseparable, along with the rising of temperature, the high-pressure pipeline generates thermal expansion, the flexible compensation joint can generate fold line deformation around the pin shaft assembly 5 according to the displacement direction, the flexible compensation joint takes the pin shaft assembly 5 as the center and the function of the universal ring, the fold line combination absorbs displacement in any direction, and the universal hinge structure annular ring is buckled to effectively restrain the pressure thrust of the corrugated pipe 3, so that the flexible joint has the compensation function of a metal hose and an expansion joint, can effectively absorb and compensate axial, transverse and angular multi-directional displacement of any pipe section, has small overall dimension and rigidity, effectively reduces stress of the high-pressure pipeline and equipment pipe orifice, and is suitable for flexible compensation of the high-pressure large-caliber pipeline in a narrow space.
The high-pressure large-caliber constraint type flexible compensation joint can be used under the conditions that the pressure is greater than 4Mpa and the caliber is greater than 600 mm.
Example 2
In particular, in the present embodiment, unlike embodiment 1, three bellows 3 are included between the first and second end pipes 1, 2, and the flexible compensation assembly includes three gimbaled hinge structures.
The high-pressure large-caliber constraint flexible compensation joint is suitable for being used under the conditions of short pipe section and small displacement.
Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.
Claims (10)
1. A high-pressure large-caliber constraint type flexible compensation joint is characterized by comprising a main pipe body assembly and a flexible compensation assembly, wherein the flexible compensation assembly is arranged outside the main pipe body assembly in a surrounding way,
the main pipe body assembly comprises a first end pipe (1) and a second end pipe (2), at least three corrugated pipes (3) are arranged between the first end pipe (1) and the second end pipe (2), an intermediate pipe (8) is arranged between two adjacent corrugated pipes (3),
one end of the flexible compensation component is fixedly connected with the first end pipe (1), the other end of the flexible compensation component is fixedly connected with the second end pipe (2),
the flexible compensation component comprises at least three universal hinge structures, the number of the universal hinge structures is equal to that of the corrugated pipes (3),
the universal hinge structure comprises a universal ring component (4), a pin shaft component (5) and a hinge plate component, wherein the universal ring component (4) is arranged on the outer side of the corrugated pipe (3) in a surrounding mode, the hinge plate component is connected to the universal ring component (4) through the pin shaft component (5), four pin shaft components (5) are arranged on the universal ring component (4), the four pin shaft components (5) are uniformly distributed on the universal ring component (4), the four pin shaft components (5) are an upper pin shaft first component, a lower pin shaft second component, a front pin shaft third component and a rear pin shaft fourth component,
the universal ring assembly (4) is connected with 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 with 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 hinge plate assembly; limiting devices (10) are arranged on the universal ring assembly (4), and the limiting devices (10) are arranged on two sides of the hinge plate assembly.
2. A high pressure large caliber restrained flexible compensation joint according to claim 1 wherein the gimbal assembly (4) comprises an end gimbal assembly (41) and a middle gimbal assembly (42), the hinge plate assembly comprises a long hinge plate assembly (9) and a short hinge plate assembly;
the middle universal ring assembly (42) is connected with 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), and the middle universal ring assembly (42) is connected with the universal ring assembly (4) on the adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly and the long hinge plate assembly (9);
the end universal ring assembly (41) is connected with 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 with the first end pipe (1) or the second end pipe (2) on the adjacent side through the front pin shaft third assembly, the rear pin shaft fourth assembly and the short hinge plate assembly.
3. A high pressure heavy caliber constrained flexible compensation joint according to claim 2, characterized in that the end gimbal assembly (41) comprises a first end gimbal (411) and a second end gimbal (412), the short hinge plate assembly comprises a first short hinge plate (12) and a second short hinge plate (22), a first end stress ring plate (11) is arranged on the first end pipe (1), one end of the first end stress ring plate (11) is fixedly connected with the first end pipe (1), and the other end of the first end stress ring plate (11) is connected with the first end gimbal (411) through the first short hinge plate (12).
4. A high-pressure large-caliber constraint type flexible compensation joint according to claim 3, wherein a second end stress ring plate (21) is arranged on the second end pipe (2), one end of the second end stress ring plate (21) is fixedly connected with the second end pipe (2), and the other end of the second end stress ring plate (21) is connected with a second end universal ring (412) through a second short hinge plate (22).
5. The high-pressure large-caliber constraint type flexible compensation joint according to claim 4, wherein an intermediate stress ring plate (7) is arranged on the outer side of each intermediate pipe (8), one end of the intermediate stress ring plate (7) is fixedly connected with the intermediate pipe (8), and the other end of the intermediate stress ring plate (7) is fixedly connected with the long hinge plate assembly (9).
6. The high-pressure large-caliber constraint type flexible compensation joint according to claim 1, wherein the limiting device (10) comprises a first limiting protrusion (101) and a second limiting protrusion (102), and a deflection space (103) is arranged between the first limiting protrusion (101) or the second limiting protrusion (102) and the hinge plate assembly.
7. A high-pressure large-caliber constraint type flexible compensation joint according to claim 1, wherein reinforcing devices (31) are arranged on the outer sides of the corrugated pipes (3).
8. A high-pressure large-caliber constraint type flexible compensation joint according to claim 7, wherein the reinforcement means (31) is provided as a reinforcement ring.
9. A high pressure large caliber constrained flexible compensation joint according to claim 1, characterized in that three bellows (3) are included between the first end pipe (1) and the second end pipe (2), the flexible compensation assembly comprising three universal hinge structures.
10. A high pressure large caliber constrained flexible compensation joint according to claim 1, characterized in that seven bellows (3) are included between the first and second end pipes (1, 2), the flexible compensation assembly comprising seven universal hinge structures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321673417.5U CN220551653U (en) | 2023-06-29 | 2023-06-29 | High-pressure large-caliber constraint type flexible compensation joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321673417.5U CN220551653U (en) | 2023-06-29 | 2023-06-29 | High-pressure large-caliber constraint type flexible compensation joint |
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| CN220551653U true CN220551653U (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321673417.5U Active CN220551653U (en) | 2023-06-29 | 2023-06-29 | High-pressure large-caliber constraint type flexible compensation joint |
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| Country | Link |
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| CN (1) | CN220551653U (en) |
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2023
- 2023-06-29 CN CN202321673417.5U patent/CN220551653U/en active Active
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