Bellows expansion joint based on flexible design

Abstract

The utility model relates to the technical field of bellow expansion joints, discloses a bellow expansion joint based on flexible design, and solves the problems that an existing bellow expansion joint is not uniform in use strength and easy to damage due to the fact that the existing bellow expansion joint is not uniform in stretching during use, and cannot be compressed and positioned during transportation, so that the service life of the bellow expansion joint is prolonged. The device comprises a rigid connecting pipe, corrugated telescopic pipes are fixedly installed on the upper side and the lower side of the rigid connecting pipe, fixed connecting discs are fixedly installed at the ends, away from the rigid connecting pipe, of the two corrugated telescopic pipes, and a plurality of fixed connecting holes are annularly formed in the surfaces of the two fixed connecting discs at equal intervals; fixed connecting rings are fixedly mounted on the circumferential surfaces of the two fixed connecting discs, and two rotating joints are symmetrically and fixedly mounted on the sides, close to each other, of the two fixed connecting rings; when in use, the bellow expansion joint can be stretched very uniformly, can be compressed and positioned during transportation, and has a very good use effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of bellows expansion joints, in particular to a bellows expansion joint based on flexible design. Background Art

[0002] The expansion and contraction effect of the bellows is mainly achieved by the bellows. The function and strength design of the bellows are mainly based on the design of the bellows. Different designs and combinations of the bellows can make the bellows stretch, compress or bend, thereby forming three basic forms of bellows: axial, transverse and angular. The existing corrugated expansion joints have the phenomenon of uneven stretching during use, resulting in uneven strength and easy breakage. In addition, they cannot be compressed and positioned during transportation, occupying transportation space. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a corrugated expansion joint based on a flexible design, which effectively solves the problem that the existing corrugated expansion joint has uneven stretching during use, resulting in uneven strength in use, easy damage, and cannot be compressed and positioned during transportation, occupying transportation space.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bellows expansion joint based on flexible design, comprising a rigid connecting pipe, wherein bellows expansion tubes are fixedly installed on the upper and lower sides of the rigid connecting pipe, and fixed connecting plates are fixedly installed on the ends of the two bellows expansion tubes away from the rigid connecting pipe, and a plurality of fixed connecting holes are opened in annular shapes at equal distances on the surfaces of the two fixed connecting plates, and fixed connecting rings are fixedly installed on the circumferential surfaces of the two fixed connecting plates, and two rotating joints are symmetrically fixedly installed on the sides of the two fixed connecting rings close to each other, and an extension and compression assembly is provided between the two sides of the rigid connecting pipe, the extension and compression assembly is rotatably connected to the four rotating joints, and the extension and compression assembly is fixedly connected to the rigid connecting pipe.

[0005] Preferably, the extension and compression assembly includes two first sliding rods and four push-pull transmission rods, the ends of the two first sliding rods close to each other are fixedly connected to the rigid connecting tube, the four push-pull transmission rods are respectively rotatably installed on one end of four rotating joints, and a first sliding sleeve is rotatably installed between the ends of two adjacent push-pull transmission rods close to each other, the two first sliding sleeves are respectively sleeved on the surfaces of the two first sliding rods, a first spring is provided on one side of the surface of the two first sliding rods, and the two ends of the two first springs are respectively fixedly connected to the rigid connecting tube and the first sliding sleeve.

[0006] Preferably, two positioning grooves are symmetrically provided on the surfaces of the two first sliding rods, and positioning slide blocks are slidably installed inside the positioning grooves. A moving frame is fixedly installed between the sides of the two adjacent positioning slide blocks away from each other, and second sliding sleeves are fixedly installed at the upper and lower ends of the two moving frames. Limiting racks are fixedly installed on both sides of the two first sliding rods close to the second sliding sleeves.

[0007] Preferably, a second sliding rod is inserted into the interior of the second sliding sleeve, a fixed pull ring is fixedly installed on the end of the second sliding rod away from the first sliding rod, a limiting tooth is fixedly installed on the end of the second sliding rod away from the fixed pull ring, a second spring is provided on the surface of the second sliding rod, both ends of the second spring are respectively fixedly connected to the second sliding sleeve and the limiting tooth, and two push rods are symmetrically fixedly installed on the side where the two moving frames are close to each other.

[0008] Compared with the prior art, the utility model has the following beneficial effects: during transportation, the operator pushes the two moving frames to move toward each other, and the two moving frames drive the positioning slide block to slide along the inner part of the positioning slide groove when moving toward each other, which increases the stability of the moving frame when moving. When the moving frame moves, the limiting tooth will be moved due to the obstruction of the limiting rack, and the limiting tooth will drive the second sliding rod to slide along the inner part of the second sliding sleeve when moving, and at the same time squeeze the second spring. When the moving frame moves, the first sliding sleeve will be pushed by the pushing rod to slide along the surface of the first sliding rod, and at the same time continue to squeeze the first spring. When the first sliding sleeve moves, the pushing transmission rod pulls the rotating joint, and when the rotating joint is pulled, the fixed connecting ring and the fixed connecting plate drive the corrugated telescopic tube to shrink. When the corrugated telescopic tube shrinks to the right, the elastic force of the second spring can push the limiting tooth to be stuck on the limiting rack for limiting, so that the corrugated telescopic tube remains in a compressed state, which is convenient for transportation.

[0009] When in use, the operator pulls the fixed pull ring to make the second slide bar slide along the inside of the second slide sleeve, thereby driving the limiting tooth to move away from the limiting rack to release the limit, and then driving the first slide sleeve to slide along the surface of the first slide bar under the push of the elastic force of the first spring. When the first slide sleeve slides, it pushes the fixed connecting ring and the fixed connecting disk to move through the push-pull transmission rod and the rotating joint. When the fixed connecting disk moves, it can evenly push the corrugated expansion tube to unfold; this makes the corrugated expansion joint can be stretched very evenly when in use, and can be compressed and positioned during transportation, which has a very good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0011] In the attached picture:

[0012] Figure 1 This is a schematic diagram of the structure of the bellows expansion joint based on flexible design of the utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the movable frame of the utility model;

[0014] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0015] In the figure: 1. Rigid connecting tube; 2. Corrugated expansion tube; 3. Fixed connecting plate; 4. Fixed connecting hole; 5. Fixed connecting ring; 6. Rotary joint; 7. Push-pull transmission rod; 8. First sliding sleeve; 9. First sliding rod; 10. First spring; 11. Positioning slide groove; 12. Positioning slider; 13. Moving frame; 14. Limiting rack; 15. Second sliding sleeve; 16. Second sliding rod; 17. Limiting tooth; 18. Second spring; 19. Fixed pull ring; 20. Push rod. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] Depend on Figures 1 to 3 The utility model includes a rigid connecting tube 1, on the upper and lower sides of which corrugated expansion tubes 2 are fixedly installed, on the ends of the two corrugated expansion tubes 2 away from the rigid connecting tube 1 are fixedly installed fixed connecting plates 3, on the surfaces of the two fixed connecting plates 3 are provided with a plurality of fixed connecting holes 4 in annular shapes and at equal distances, on the circumferential surfaces of the two fixed connecting plates 3 are fixedly installed fixed connecting rings 5, on the sides of the two fixed connecting rings 5 ​​close to each other are symmetrically fixedly installed two rotating joints 6, between the two sides of the rigid connecting tube 1 is provided an extension and compression assembly, the extension and compression assembly is rotatably connected to the four rotating joints 6, and the extension and compression assembly is fixedly connected to the rigid connecting tube 1.

[0018] During transportation, the operator adjusts the stretch-compression assembly to pull the rotary joint 6. When the rotary joint 6 is pulled, it drives the bellows 2 to shrink through the fixed connection ring 5 and the fixed connection plate 3. When the bellows 2 shrinks into place, the stretch-compression assembly can be positioned, so that the bellows 2 remains in a compressed state, which is convenient for transportation. During use, the operator adjusts the stretch-compression assembly to push the rotary joint 6. The rotary joint 6 can push the fixed connection ring 5 and the fixed connection plate 3 to move. When the fixed connection plate 3 moves, it can evenly push the bellows 2 to expand. This allows the bellows expansion joint to be stretched very evenly during use, and can be compressed and positioned during transportation, which has a very good use effect.

[0019] The extension and compression assembly includes two first slide bars 9 and four push-pull transmission rods 7. The ends of the two first slide bars 9 close to each other are fixedly connected to the rigid connection tube 1. The four push-pull transmission rods 7 are rotatably installed at one end of the four rotating joints 6. The first sliding sleeves 8 are rotatably installed between the ends of the two adjacent push-pull transmission rods 7 close to each other. The two first sliding sleeves 8 are respectively sleeved on the surfaces of the two first slide bars 9. One side of the surfaces of the two first slide bars 9 is provided with a first spring 10. The two ends of the two first springs 10 are respectively fixedly connected to the rigid connection tube 1 and the first sliding sleeve 8; the surfaces of the two first slide bars 9 are symmetrically provided with two positioning grooves 11, and the interior of the positioning grooves 11 is slidably installed with positioning sliders 12. The two adjacent positioning A moving frame 13 is fixedly installed between the sides of the sliders 12 that are away from each other, and a second sliding sleeve 15 is fixedly installed on the upper and lower ends of the two moving frames 13. Limit racks 14 are fixedly installed on both sides of the two first sliding bars 9 close to the second sliding sleeve 15; a second sliding bar 16 is inserted into the inside of the second sliding sleeve 15, and a fixed pull ring 19 is fixedly installed on the end of the second sliding bar 16 away from the first sliding bar 9, and a limiting tooth 17 is fixedly installed on the end of the second sliding bar 16 away from the fixed pull ring 19. A second spring 18 is provided on the surface of the second sliding bar 16, and the two ends of the second spring 18 are respectively fixedly connected to the second sliding sleeve 15 and the limiting tooth 17, and two pushing rods 20 are symmetrically fixedly installed on the side of the two moving frames 13 that are close to each other.

[0020] During transportation, the operator pushes the two moving frames 13 to move toward each other. When the two moving frames 13 move toward each other, they both drive the positioning slider 12 to slide along the inside of the positioning slide groove 11, thereby increasing the stability of the moving frame 13 when moving. When the moving frame 13 moves, the limiting tooth 17 will move due to the obstruction of the limiting rack 14. When the limiting tooth 17 moves, it drives the second slide bar 16 to slide along the inside of the second slide sleeve 15 and squeezes the second spring 18 at the same time. When the moving frame 13 moves, the pushing rod 20 will push the first slide sleeve 8 to slide along the surface of the first slide bar 9 and continue to squeeze the first spring 10 at the same time. When the first slide sleeve 8 moves, it will be pulled by the push-pull transmission rod 7 The movable rotary joint 6 is moved, so that the corrugated expansion joint can be contracted. When the corrugated expansion joint is contracted to the right position, the elastic force of the second spring 18 can push the limit tooth 17 to be stuck on the limit rack 14 for limiting, so that the corrugated expansion joint remains in a compressed state, which is convenient for transportation; when in use, the operator pulls the fixed pull ring 19 to make the second slide bar 16 slide along the inside of the second slide sleeve 15, thereby driving the limit tooth 17 away from the limit rack 14 to release the limit, and then driving the first slide sleeve 8 to slide along the surface of the first slide bar 9 under the push of the elastic force of the first spring 10. When the first slide sleeve 8 slides, it pushes the corrugated expansion joint to be evenly expanded by pushing and pulling the transmission rod 7 and the rotary joint 6.

Claims

1. A bellows expansion joint based on flexible design, comprising a rigid connecting pipe (1), characterized in that: The upper and lower sides of the rigid connection pipe (1) are fixedly mounted with a corrugated expansion pipe (2); the ends of the two corrugated expansion pipes (2) away from the rigid connection pipe (1) are fixedly mounted with a fixed connection plate (3); the surfaces of the two fixed connection plates (3) are provided with a plurality of fixed connection holes (4) in an annular manner and at equal intervals; the circumferential surfaces of the two fixed connection plates (3) are fixedly mounted with a fixed connection ring (5); the sides of the two fixed connection rings (5) close to each other are symmetrically fixedly mounted with two rotating joints (6); an extension and compression assembly is provided between the two sides of the rigid connection pipe (1); the extension and compression assembly is rotationally connected to the four rotating joints (6); and the extension and compression assembly is fixedly connected to the rigid connection pipe (1).

2. The bellows expansion joint based on flexible design according to claim 1, characterized in that: The stretching and compression assembly comprises two first sliding rods (9) and four push-pull transmission rods (7). The ends of the two first sliding rods (9) close to each other are fixedly connected to the rigid connection tube (1). The four push-pull transmission rods (7) are rotatably mounted on one end of four rotating joints (6). A first sliding sleeve (8) is rotatably mounted between the ends of two adjacent push-pull transmission rods (7) close to each other. The two first sliding sleeves (8) are respectively sleeved on the surfaces of the two first sliding rods (9). A first spring (10) is provided on one side of the surface of the two first sliding rods (9). The two ends of the two first springs (10) are respectively fixedly connected to the rigid connection tube (1) and the first sliding sleeve (8).

3. The bellows expansion joint based on flexible design according to claim 2, characterized in that: The surfaces of the two first slide bars (9) are symmetrically provided with two positioning grooves (11), the interiors of the positioning grooves (11) are slidably provided with positioning slide blocks (12), a moving frame (13) is fixedly provided between the sides of the two adjacent positioning slide blocks (12) that are away from each other, a second sliding sleeve (15) is fixedly provided at the upper and lower ends of the two moving frames (13), and limiting racks (14) are fixedly provided on both sides of the two first slide bars (9) close to the second sliding sleeve (15).

4. The bellows expansion joint based on flexible design according to claim 3, characterized in that: The second sliding sleeve (15) is inserted with a second sliding rod (16) inside, and a fixed pull ring (19) is fixedly installed on one end of the second sliding rod (16) away from the first sliding rod (9), and a limiting latch tooth (17) is fixedly installed on one end of the second sliding rod (16) away from the fixed pull ring (19). A second spring (18) is provided on the surface of the second sliding rod (16), and both ends of the second spring (18) are respectively fixedly connected to the second sliding sleeve (15) and the limiting latch tooth (17), and two push rods (20) are symmetrically fixedly installed on the side of the two moving frames (13) close to each other.

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