High-temperature-resistant expansion joint capable of being synchronously adjusted

Abstract

The utility model relates to the technical field of expansion joints, in particular to a high-temperature-resistant synchronously-adjustable expansion joint which comprises an expansion joint body structure and an adjusting structure, the expansion joint body structure comprises an expansion joint, the expansion joint comprises a middle fixing pipe, corrugated pipes are connected to the two ends of the fixing pipe, and pipe ends are fixedly connected to the ends of the corrugated pipes. The tail end of the pipe end is connected with a flange, a sealing connector is arranged on the inner ring of the flange in a protruding mode, and the adjusting structure comprises a driving structure and a synchronous structure. And the adjusting frequencies of all the adjusting structures can be the same through the synchronous structure, stability is guaranteed, the problem that the ends deviate and incline is avoided, the situation that the connecting and sealing effects are reduced due to the fact that the ends of the expansion joint are uneven can be effectively prevented, and the using effect of the expansion joint can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to a high-temperature resistant synchronously adjustable expansion joint. Background Art

[0002] An expansion joint refers to a flexible element that can effectively compensate for axial deformation. For example, the expansion joint welded on the fixed tube sheet heat exchanger shell has large axial flexibility and is easy to deform. It can compensate for the thermal expansion difference between the tube and the shell due to different wall temperatures, reduce their axial load, and thus reduce the temperature difference stress of the tube, tube sheet and shell, and avoid causing strength damage, instability damage and tube pull-off damage. The expansion joint in the prior art requires an adjustable structure to adapt to different occasions and increase adaptability. However, the general adjustment method of the expansion joint is to adjust each adjustment rod separately. The adjustment operation is cumbersome and prone to errors, which affects the connection of the expansion joint and may cause leakage at the connection part of the expansion joint. Therefore, a structure that can make the expansion joint synchronously adjustable is needed to ensure that the end of the expansion joint is flat, does not appear to be offset or skewed, affects the stability of the connection, increases the connection sealing, and improves the use effect. To this end, the utility model proposes a high-temperature resistant synchronously adjustable expansion joint to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a high temperature resistant synchronously adjustable expansion joint to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a high temperature resistant synchronously adjustable expansion joint, comprising

[0005] The main structure of the expansion joint includes an expansion joint, wherein the expansion joint includes a fixed pipe in the middle, and both ends of the fixed pipe are connected with a bellows, and the ends of the bellows are fixedly connected with a pipe end head, and the end of the pipe end head is connected with a flange, and the inner ring of the flange is protruded with a sealing joint;

[0006] The adjusting structure comprises a driving structure and a synchronous structure, wherein the synchronous structure comprises a gear ring track protruding in the middle of the outer side of the fixed tube, a gear ring is rotatably connected to the outer side of the gear ring track, support plates are fixedly connected to the fixed tubes on both sides of the gear ring, synchronous gears are rotatably connected between the support plates, the synchronous gears are meshed with the gear ring for transmission, a transmission screw is arranged in the middle of the synchronous gear, threads in opposite directions are arranged on the outer sides of both ends of the transmission screw, a plurality of transmission screws are arranged, and the ends of the transmission screws are connected to the flanges, and the driving structure comprises a fixed block fixedly connected to one side of the fixed tube, a driving gear is arranged in the middle of the fixed block, and the driving gear is meshed with the gear ring for transmission.

[0007] Preferably, a transmission screw is fixedly connected in the middle of the synchronous gear, both ends of the transmission screw pass through support plates, and limiting nuts are threadedly connected to the outer sides of the transmission screw on both sides of the support plates. The end of the transmission screw is threadedly fed and connected to the outer ring of the flange, and the outer ring of the flange is protruding with a plurality of drive blocks corresponding to the number of the transmission screws. A feed threaded hole is provided in the middle of the drive block, and the transmission screw is threadedly connected to the threaded hole in the drive block. The end of the transmission screw passes through the drive block and protrudes to the other side, and a limiting retaining ring is fixedly connected to the outer side of the protruding transmission screw.

[0008] Preferably, the fixed block includes two groups symmetrically distributed on both sides of the gear ring, the height of the fixed block is greater than the height of the gear ring, a driving gear is rotatably connected between the fixed blocks on both sides, a driving shaft is fixedly connected in the middle of the driving gear, and both sides of the driving shaft are rotatably connected in the fixed block, one side of the driving shaft is transmission-connected to a driven bevel gear on the outer side, and one side of the driven bevel gear is transmission-connected to an active bevel gear, the active bevel gear and the driven bevel gear are vertically distributed, a rotating shaft is arranged in the middle of the active bevel gear, and the lower end of the rotating shaft is rotatably connected to the upper end of a fixed block on one side.

[0009] Preferably, a bump is protruding from the upper end of the active bevel gear, and a driving groove is provided in the middle of the upper end of the bump. The driving groove is in the shape of a hexagonal hole and is driven by a hexagonal wrench.

[0010] Preferably, the driving groove can also be set as a transmission disk, which is driven by a transmission belt, and the other side of the transmission belt is transmission-connected to the driving disk. The driving disk is set at the transmission output end of the motor, and the motor is fixedly connected to one side of the fixed block.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can make the expansion joint adjustment structure synchronously adjusted by setting a synchronization structure, which can effectively increase the convenience of expansion joint adjustment. The synchronization structure can make the adjustment frequency of each group of adjustment structures the same, ensuring stability, and will not cause problems such as end deviation and skew. It can effectively prevent the unevenness of the expansion joint end, which leads to a decrease in the connection sealing effect, and can effectively improve the use effect of the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a left side structural view of the utility model;

[0015] Figure 3 This is the right side structural view of the utility model;

[0016] Figure 4 for Figure 3A schematic diagram of the enlarged structure at point A in the middle.

[0017] In the figure: 1 expansion joint, 2 fixed pipe, 3 gear ring track, 4 gear ring, 5 fixed block, 6 driving gear, 7 driving shaft, 8 driven bevel gear, 9 active bevel gear, 10 driving groove, 11 support plate, 12 driving screw, 13 synchronous gear, 14 limit nut, 15 flange, 16 driving block, 17 limit retaining ring, 18 sealing joint. DETAILED DESCRIPTION

[0018] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a high temperature resistant synchronously adjustable expansion joint, comprising

[0023] The main structure of the expansion joint includes an expansion joint 1, which includes a fixed pipe 2 in the middle, with bellows connected at both ends of the fixed pipe 2, a pipe end fixedly connected at the end of the bellows, a flange 15 connected at the end of the pipe end, and a sealing joint 18 protruding from the inner circle of the flange 15;

[0024] The adjustment structure includes a driving structure and a synchronization structure. The synchronization structure includes a gear ring track 3 protruding from the middle of the outer side of the fixed tube 2. The outer side of the gear ring track 3 is rotatably connected with a gear ring 4. Support plates 11 are fixedly connected to the fixed tubes 2 on both sides of the gear ring 4. Synchronous gears 13 are rotatably connected between the support plates 11. The synchronous gears 13 are meshed with the gear ring 4 for transmission. A transmission screw 12 is arranged in the middle of the synchronous gear 13. Threads in opposite directions are arranged on the outer sides of the two ends of the transmission screw 12. The transmission screw 12 is arranged in several groups. The end of the transmission screw 12 is connected to the flange 15. The driving structure includes a fixed block 5 fixedly connected to one side of the fixed tube 2. A driving gear 6 is arranged in the middle of the fixed block 5. The driving gear 6 is meshed with the gear ring 4 for transmission.

[0025] The middle of the synchronous gear 13 is fixedly connected to the transmission screw 12, and both ends of the transmission screw 12 pass through the support plate 11. The outer side of the transmission screw 12 on both sides of the support plate is threadedly connected to the limit nut 14. The end of the transmission screw 12 is threadedly connected to the outer ring of the flange 15. The outer ring of the flange 15 is protruding with a number of drive blocks 16 corresponding to the number of the transmission screw 12. The middle of the drive block 16 is provided with a feed threaded hole. The transmission screw 12 is threadedly connected to the threaded hole in the drive block 16. The end of the transmission screw 12 passes through the drive block 16 and protrudes to the other side, and The outer side of the protruding transmission screw 12 is fixedly connected to the limited stop ring 17, and the two ends of the expansion joint 1 can be contracted or extended through the transmission screw 12, and the synchronous gear 13 is meshed with the ring gear 4 for transmission. The ring gear 4 is driven by the driving gear 6, and the ring gear 4 drives the synchronous gear 13, which can synchronously drive several groups of transmission screws 12, which can effectively improve the adjustment stability and ensure the adjustment accuracy, avoid the end of the expansion joint 1 from being offset and twisted, and affect the connection of the expansion joint 1, and can effectively improve the connection sealing of the expansion joint 1 and improve the use effect;

[0026] The fixed block 5 includes two groups symmetrically distributed on both sides of the gear ring 4. The height of the fixed block 5 is greater than that of the gear ring 4. A driving gear 6 is rotatably connected between the fixed blocks 5 on both sides. A driving shaft 7 is fixedly connected in the middle of the driving gear 6. Both sides of the driving shaft 7 are rotatably connected in the fixed block 5. A driven bevel gear 8 is transmission-connected to the outer side of the driving shaft 7 on one side. An active bevel gear 9 is transmission-connected to one side of the driven bevel gear 8. The active bevel gear 9 and the driven bevel gear 8 are vertically distributed. A rotating shaft is arranged in the middle of the active bevel gear 9. The lower end of the rotating shaft is rotatably connected to the upper end of the fixed block 5 on one side. The driven bevel gear 8 can be driven by the active bevel gear 9, and then the driving shaft 7 is driven to drive the driving gear 6. The driving gear 6 is meshed with the gear ring 4, and can drive the gear ring 4 to rotate, thereby driving the synchronous structure to rotate and adjust the expansion joint 1.

[0027] A convex block is protruded from the upper end of the active bevel gear 9, and a driving groove 10 is provided in the middle of the upper end of the convex block. The driving groove 10 is in the shape of a hexagonal hole and can be driven by a hexagonal wrench. The expansion joint 1 can be manually driven and adjusted through the driving groove 10, which is suitable for occasions where it is inconvenient to connect electricity.

[0028] The driving groove 10 can also be set as a transmission disk, which is driven by a transmission belt. The other side of the transmission belt is connected to the driving disk. The driving disk is set at the transmission output end of the motor. The motor is fixedly connected to one side of the fixed block 5. The active bevel gear 9 is driven by the motor, which has a higher degree of automation and is suitable for occasions where electricity can be supplied.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant synchronously adjustable expansion joint, characterized in that: include The main structure of the expansion joint comprises an expansion joint (1), wherein the expansion joint (1) comprises a fixed pipe (2) in the middle, wherein both ends of the fixed pipe (2) are connected to a bellows, wherein the ends of the bellows are fixedly connected to a pipe end head, wherein the end of the pipe end head is connected to a flange (15), wherein the inner ring of the flange (15) is protruded and provided with a sealing joint (18); The adjusting structure comprises a driving structure and a synchronous structure. The synchronous structure comprises a gear ring track (3) protruding from the middle of the outer side of the fixed tube (2). The outer side of the gear ring track (3) is rotatably connected to a gear ring (4). Support plates (11) are fixedly connected to the fixed tubes (2) on both sides of the gear ring (4). Synchronous gears (13) are rotatably connected between the support plates (11). The synchronous gears (13) mesh with the gear ring (4) for transmission. A transmission screw (12) is arranged in the middle of the synchronous gear (13). The outer sides of the two ends of the transmission screw (12) are provided with threads in opposite directions. The transmission screw (12) is provided in a plurality of groups. The end of the transmission screw (12) is connected to a flange (15). The driving structure comprises a fixed block (5) fixedly connected to one side of the fixed tube (2). A driving gear (6) is arranged in the middle of the fixed block (5). The driving gear (6) meshes with the gear ring (4) for transmission.

2. A high temperature resistant synchronously adjustable expansion joint according to claim 1, characterized in that: The synchronous gear (13) is fixedly connected to a transmission screw (12) in the middle, and both ends of the transmission screw (12) pass through a support plate (11). The outer sides of the transmission screw (12) on both sides of the support plate are threadedly connected with limit nuts (14). The end of the transmission screw (12) is threadedly connected to the outer ring of the flange (15). The outer ring of the flange (15) is protrudingly provided with a plurality of drive blocks (16) corresponding to the number of the transmission screw (12). The middle of the drive block (16) is provided with a feed threaded hole. The transmission screw (12) is threadedly connected to the threaded hole in the drive block (16). The end of the transmission screw (12) passes through the drive block (16) and protrudes to the other side, and the outer side of the protruding transmission screw (12) is fixedly connected to a limit retaining ring (17).

3. The high temperature resistant synchronously adjustable expansion joint according to claim 1, characterized in that: The fixed block (5) comprises two groups symmetrically arranged on both sides of the gear ring (4); the height of the fixed block (5) is greater than the height of the gear ring (4); a driving gear (6) is rotatably connected between the fixed blocks (5) on both sides; a driving shaft (7) is fixedly connected in the middle of the driving gear (6); both sides of the driving shaft (7) are rotatably connected in the fixed block (5); a driven bevel gear (8) is transmission-connected on the outer side of one side of the driving shaft (7); one side of the driven bevel gear (8) is transmission-connected with an active bevel gear (9); the active bevel gear (9) and the driven bevel gear (8) are vertically distributed; a rotating shaft is arranged in the middle of the active bevel gear (9); the lower end of the rotating shaft is rotatably connected to the upper end of the fixed block (5) on one side.

4. A high temperature resistant synchronously adjustable expansion joint according to claim 3, characterized in that: The upper end of the active bevel gear (9) is provided with a protruding block, and a driving groove (10) is provided in the middle of the upper end of the protruding block. The driving groove (10) is in the shape of a hexagonal hole and is driven by a hexagonal wrench.

5. A high temperature resistant synchronously adjustable expansion joint according to claim 4, characterized in that: The driving groove (10) can also be configured as a transmission disc, which is driven by a transmission belt, the other side of which is transmission-connected to the driving disc, and the driving disc is arranged at the transmission output end of the motor, which is fixedly connected to one side of the fixed block (5).

Images