Large-displacement axial expansion joint

Abstract

The utility model discloses a large-displacement axial expansion joint, and belongs to the technical field of expansion joints. The device mainly comprises an upper flange plate and a lower flange plate, an axial corrugated pipe is installed between the upper flange plate and the lower flange plate, the side wall of the upper flange plate is fixedly connected with an adjusting mechanism, and the side wall of the lower flange plate is fixedly connected with a supporting mechanism. A traditional supporting mode that a screw rod is matched with a nut is replaced with a supporting mode that the supporting mechanism is matched with the adjusting mechanism, a supporting rod with a first tooth groove in the supporting mechanism slides in an inserting groove of the adjusting mechanism, position limiting is conducted through a second tooth groove of a moving block, and therefore when the length of the telescopic connector is adjusted, the adjusting mechanism can adjust the length of the telescopic connector. Convenience is provided, the length between the upper flange plate and the lower flange plate can be adjusted only by pulling and loosening the pulling plate, and convenience is provided for installation of the telescopic connector.

Description

Technical Field

[0001] The present application relates to the technical field of expansion joints, and in particular to a large-displacement axial expansion joint. Background Art

[0002] Metal bellows expansion joint is a device used to connect pipes, usually made of stainless steel or other metal materials. It has a corrugated structure, which can reduce shock, stress and noise when the pipe is subjected to thermal expansion and contraction or vibration shock.

[0003] After searching, the announcement number is CN216666822U, which discloses a large displacement axial expansion joint, including an inner tube and an outer tube, a first retaining ring is fixedly provided at one end of the inner tube, a second retaining ring is fixedly provided at one end of the outer tube, rings are provided inside the first retaining ring and the second retaining ring, an axial bellows is provided between the two rings, a limit block is fixedly provided on the first retaining ring and the second retaining ring, a slide groove is provided on the outer side of the inner tube and the inner side of the outer tube, the limit block is slidably connected in the slide groove, a connecting ring is provided at the other end of the inner tube and the outer tube, and flanges are provided on the two connecting rings. This large displacement axial expansion joint has strong strength and is not easy to bend and deform during large displacement movement, and a rubber ring is clamped inside the bellows body, thereby improving the anti-leakage function of the joint, and flanges are provided on the connecting rings to facilitate the connection of the inner tube and the outer tube.

[0004] However, existing expansion joints often provide support for the axial bellows through nuts and screws or through inner and outer tube sleeves to prevent the bellows from deforming and leaking. When the nut and screw method is used, if the two pipes are slightly misaligned when the expansion joint is installed on the flange on the pipe, there is a possibility that when the expansion joint is connected through the expansion joint, due to the nut and screw or the support method of the inner and outer tube sleeves used in the expansion joint, it will cause inconvenience during installation.

[0005] Therefore, it is necessary to provide a large displacement axial expansion joint to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Utility Model Content

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a large displacement axial expansion joint to solve the problem of the inconvenience of using the expansion joint.

[0008] The technical solution adopted by this application to solve its technical problem is:

[0009] A large displacement axial expansion joint comprises an upper flange and a lower flange, an axial bellows is arranged between the upper flange and the lower flange, the side walls of the upper flange are respectively fixedly connected with an adjustment mechanism, the adjustment mechanism comprises an upper fixed seat, a moving block, a sliding mechanism and an extrusion mechanism, a slot is provided inside the upper fixed seat, two sides of the moving block are respectively slidably connected in the slot through the sliding mechanism, and the extrusion mechanism is rotatably installed on one side wall of the moving block;

[0010] The side walls of the lower flange are respectively fixedly connected with support mechanisms, and the support mechanisms include a lower fixed seat, a first rotating seat, a support rod and a first tooth groove. The side walls of the support rod are provided with a first tooth groove, and the side walls of the moving block are provided with a second tooth groove. The first tooth groove is meshed with the second tooth groove, and the bottom of the support rod is plugged into the inside of the slot, and the bottom end of the support rod is fixedly connected to the top surface of the first rotating seat. The side walls of the first rotating seat are rotatably connected to the lower fixed seat through a fixed shaft.

[0011] Preferably, the sliding mechanism comprises a limiting groove and an axle rod, the side walls of the slot are respectively provided with limiting grooves, the axle rod is respectively fixedly connected to the side walls of the moving block, and the axle rod is respectively slidably connected in the limiting grooves.

[0012] Preferably, the extrusion mechanism includes a rotating shaft, a second rotating seat, a sliding rod, a sliding groove and a pull plate, the rotating shaft is installed on the side wall of the movable seat, the interior of the second rotating seat is rotatably connected to the side wall of the rotating shaft, the side wall of the second rotating seat is fixedly connected to one end of the sliding rod, the outer side wall of the upper fixed seat is provided with a sliding groove, the sliding rod is slidably connected in the sliding groove, the other end of the sliding rod is fixedly connected to the pull plate, and the side wall of the sliding rod is sleeved with a spring.

[0013] Preferably, the slide groove is in a rectangular structure, one end of the spring abuts against a side wall of the slot, and the other end of the spring abuts against a side wall of the moving block.

[0014] Preferably, the outer edges of the top surface and the bottom surface of the axial bellows are respectively provided with outwardly turned portions, the surfaces of the upper flange and the lower flange are provided with stepped grooves, and the outwardly turned portions on both ends of the axial bellows are located in the stepped grooves.

[0015] Preferably, a second sealing ring is provided between the stepped groove and the outward-turned portion.

[0016] Preferably, an annular groove is formed around the surface of the upper flange and the lower flange, and a first sealing ring is installed in the annular groove.

[0017] The beneficial effects of this application are:

[0018] By replacing the traditional support method of a screw rod and a nut with a support method of a support mechanism and an adjusting mechanism, and by allowing a support rod with a first tooth groove in the support mechanism to slide in a slot of the adjusting mechanism, and by limiting the position through the second tooth groove of the moving block, convenience is provided when adjusting the length of the expansion joint. The length between the upper flange and the lower flange can be adjusted by only pulling the pull plate and releasing it, thereby providing convenience for the installation of the expansion joint.

[0019] At the same time, by installing the bottom of the support rod on a rotatable first rotating seat, the moving block can also adjust its position in the slot according to the rotation range of the support rod to ensure that it is always in an engaged state. Therefore, when the upper flange and the lower flange need to be fine-tuned during installation, the installation docking process can also be performed, thereby solving the problem of inconvenient operation due to misaligned installation.

[0020] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] In the attached picture:

[0023] Figure 1 It is an overall schematic diagram of a large displacement axial expansion joint in this application;

[0024] Figure 2 for Figure 1 Structural diagram of the middle and upper flange;

[0025] Figure 3 for Figure 1 Schematic diagram of the central axial bellows structure;

[0026] Figure 4 for Figure 1 Schematic diagram of the middle and lower flange and support mechanism structure;

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the central adjustment mechanism.

[0028] Among them, the reference numerals in the figure are:

[0029] 1. Upper flange;

[0030] 2. Axial bellows; 21. Outward-turning part;

[0031] 3. Lower flange;

[0032] 4. Support mechanism; 41. Lower fixed seat; 42. First rotating seat; 43. Support rod; 44. First tooth groove;

[0033] 5. Adjustment mechanism; 51. Upper fixed seat; 52. Slot; 53. Limiting slot; 54. Axle; 55. Moving block; 56. Second tooth groove; 57. Rotating shaft; 58. Second rotating seat; 59. Sliding rod; 510. Sliding slot; 511. Pull plate; 512. Spring;

[0034] 6. Ring groove;

[0035] 7. The first sealing ring;

[0036] 8. Step groove; 9. Second sealing ring. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0039] See also Figure 1-5 , the utility model provides embodiments:

[0040] A large displacement axial expansion joint comprises an upper flange 1 and a lower flange 3, an axial bellows 2 is arranged between the upper flange 1 and the lower flange 3, the upper flange 1 and the lower flange 3 are respectively fixed to the flanges on the corresponding pipe openings by bolts, and the axial bellows 2 can be expanded and contracted according to different lengths required for installation, so that the expansion joint can be installed on equipment for use.

[0041] An annular groove 6 is provided around the surface of the upper flange 1 and the lower flange 3, and a first sealing ring 7 is installed in the annular groove 6. The first sealing ring 7 is added to ensure the airtightness of the interface after the flange on the corresponding pipe port is installed.

[0042] In order to support the axial bellows 2 to prevent deformation during and after the adjustment of the length of the axial bellows 2, the side walls of the upper flange 1 are respectively fixedly connected with adjustment mechanisms 5, and the adjustment mechanism 5 includes an upper fixed seat 51, a moving block 55, a sliding mechanism and an extrusion mechanism. A slot 52 is provided inside the upper fixed seat 51, and both sides of the moving block 55 are respectively slidably connected in the slot 52 through the sliding mechanism, and the extrusion mechanism is rotatably installed on one side wall of the moving block 55;

[0043] Specifically, the sliding mechanism includes a limiting groove 53 and a shaft rod 54. The limiting grooves 53 are respectively provided on the side walls of the slot 52. The shaft rod 54 is respectively fixedly connected to the side walls of the moving block 55. The shaft rod 54 is respectively slidably connected in the limiting grooves 53.

[0044] The extrusion mechanism includes a rotating shaft 57, a second rotating seat 58, a sliding rod 59, a sliding groove 510 and a pulling plate 511. The rotating shaft 57 is installed on the side wall of the moving seat. The interior of the second rotating seat 58 is rotatably connected to the side wall of the rotating shaft 57. The side wall of the second rotating seat 58 is fixedly connected to one end of the sliding rod 59. The outer wall of the upper fixed seat 51 is provided with a sliding groove 510. The sliding rod 59 is slidably connected in the sliding groove 510. The other end of the sliding rod 59 is fixedly connected to the pulling plate 511. The side wall of the sliding rod 59 is sleeved with a spring 512. One end of the spring 512 abuts against the side wall of the slot 52, and the other end of the spring 512 abuts against the side wall of the moving block 55.

[0045] During use, when it is necessary to adjust the position in the slot 52 of the support mechanism 4 and to adjust it according to the length of the axial bellows 2, the pull plate 511 is pulled to drive the slide bar 59 to slide outward in the slide groove 510, and at the same time, the second rotating seat 58 pulls the moving block 55 to slide outward, and the shaft rod 54 slides in the limiting groove 53, thereby separating the moving block 55 from the support mechanism 4, and then the position of the support mechanism 4 in the slot 52 can be adjusted, so that it can be adjusted according to the length of the axial bellows 2. During this process, the spring 512 will be compressed and reset on the side wall of the slide bar 59.

[0046] In order to fine-tune the position misalignment between the upper flange 1 and the lower flange 3, so as to facilitate the fixed installation with the flange on the corresponding pipe opening,

[0047] The side walls of the lower flange 3 are respectively fixedly connected with the support mechanism 4, and the support mechanism 4 includes a lower fixed seat 41, a first rotating seat 42, a support rod 43 and a first tooth groove 44. The side wall of the support rod 43 is provided with a first tooth groove 44, and the side wall of the moving block 55 is provided with a second tooth groove 56. The first tooth groove 44 and the second tooth groove 56 are meshed and connected. The bottom of the support rod 43 is plugged into the inside of the slot 52, and the bottom end of the support rod 43 is fixedly connected to the top surface of the first rotating seat 42. The side wall of the first rotating seat 42 is rotatably connected to the lower fixed seat 41 through a fixed shaft, and the slide groove 510 has a rectangular structure.

[0048] When the pull plate 511 is pulled, the spring 512 is compressed in the slot 52, so that the second tooth groove 56 on the side wall of the movable block 55 is separated from the first tooth groove 44 on the support rod 43, thereby forming a contact engagement relationship. Then, after adjusting the length of the axial bellows 2, when the pull plate 511 is released, the first tooth groove 44 and the second tooth groove 56 are engaged here due to the reset action of the spring 512, thereby fixing the support rod 43 in the slot 52, thereby providing support for the adjusted axial bellows 2.

[0049] When installing, if the upper flange 1 and the lower flange 3 need to be misaligned, the first rotating seat 42 on the bottom of the support rod 43 is rotated in the upper fixed seat 51, and the position of the support rod 43 in the slot 52 is also offset, which acts on the moving block 55. At this time, the moving block 55 rotates in the limiting groove 53 through the shaft 54 ​​on the side wall, and the sliding rod 59 slides in the rectangular sliding groove 510, so that even if the upper flange 1 and the lower flange 3 are installed in a misaligned manner, the support rod 43 can provide support force for the axial bellows 2, and it is also convenient for the installation of the telescopic joint.

[0050] In addition, the outer edges of the top surface and the bottom surface of the axial bellows 2 are respectively provided with outward-turned portions 21, and the surfaces of the upper flange 1 and the lower flange 3 are provided with stepped grooves 8. The outward-turned portions 21 on both ends of the axial bellows 2 are located in the stepped grooves 8, and a second sealing ring 9 is also provided between the stepped grooves 8 and the outward-turned portions 21. The outward-turned portions 21 are placed in the stepped grooves 8 to enable the upper flange 1 and the lower flange 3 to be tightly connected to the two ends of the axial bellows 2, thereby extending the service life. At the same time, the second sealing ring 9 also prevents water leakage at the joints.

[0051] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large displacement axial expansion joint, comprising an upper flange (1) and a lower flange (3), wherein an axial bellows (2) is arranged between the upper flange (1) and the lower flange (3), characterized in that: The side walls of the upper flange (1) are respectively fixedly connected with an adjustment mechanism (5), the adjustment mechanism (5) comprising an upper fixed seat (51), a moving block (55), a sliding mechanism and an extrusion mechanism, a slot (52) is provided inside the upper fixed seat (51), two sides of the moving block (55) are respectively slidably connected in the slot (52) through the sliding mechanism, and the extrusion mechanism is rotatably mounted on one side wall of the moving block (55); The side walls of the lower flange (3) are respectively fixedly connected with a support mechanism (4), and the support mechanism (4) comprises a lower fixed seat (41), a first rotating seat (42), a support rod (43) and a first tooth groove (44). The side wall of the support rod (43) is provided with a first tooth groove (44), and the side wall of the moving block (55) is provided with a second tooth groove (56). The first tooth groove (44) and the second tooth groove (56) are meshedly connected. The bottom of the support rod (43) is plugged into the inside of the slot (52), and the bottom end of the support rod (43) is fixedly connected to the top surface of the first rotating seat (42). The side wall of the first rotating seat (42) is rotatably connected to the lower fixed seat (41) through a fixed shaft.

2. The large displacement axial expansion joint according to claim 1, characterized in that: The sliding mechanism comprises a limiting groove (53) and a shaft rod (54); the limiting grooves (53) are respectively provided on the side walls of the slot (52); the shaft rod (54) is respectively fixedly connected to the side walls of the moving block (55); and the shaft rod (54) is respectively slidably connected in the limiting grooves (53).

3. The large displacement axial expansion joint according to claim 2, characterized in that: The extrusion mechanism comprises a rotating shaft (57), a second rotating seat (58), a sliding rod (59), a sliding groove (510) and a pulling plate (511); the rotating shaft (57) is installed on the side wall of the movable seat; the interior of the second rotating seat (58) is rotatably connected to the side wall of the rotating shaft (57); the side wall of the second rotating seat (58) is fixedly connected to one end of the sliding rod (59); the outer side wall of the upper fixed seat (51) is provided with a sliding groove (510); the sliding rod (59) is slidably connected in the sliding groove (510); the other end of the sliding rod (59) is fixedly connected to the pulling plate (511); and the side wall of the sliding rod (59) is sleeved with a spring (512).

4. The large displacement axial expansion joint according to claim 3, characterized in that: The sliding groove (510) has a rectangular structure, one end of the spring (512) abuts against the side wall of the slot (52), and the other end of the spring (512) abuts against the side wall of the moving block (55).

5. The large displacement axial expansion joint according to claim 1, characterized in that: The outer edges of the top surface and the bottom surface of the axial bellows (2) are respectively provided with outwardly turned portions (21); the surfaces of the upper flange (1) and the lower flange (3) are provided with stepped grooves (8); and the outwardly turned portions (21) at both ends of the axial bellows (2) are located in the stepped grooves (8).

6. The large displacement axial expansion joint according to claim 5, characterized in that: A second sealing ring (9) is also provided between the stepped groove (8) and the outward-turned portion (21).

7. The large displacement axial expansion joint according to claim 1, characterized in that: An annular groove (6) is formed around the surface of the upper flange (1) and the lower flange (3), and a first sealing ring (7) is installed in the annular groove (6).

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