Anti-deformation compensation type bellows expansion joint

Abstract

The application relates to the technical field of expansion joints, and discloses a deformation-preventing compensation type bellows expansion joint which comprises two first connecting pipes, two conveying pipes and a second connecting pipe. One end of each first connecting pipe is communicated and fixed with a first inner pipe. Both ends of the second connecting pipe are communicated and fixed with second inner pipes. The second inner pipes are sleeved outside the first inner pipes and are slidably connected with the first inner pipes. Corrugated pipes are arranged between the two ends of the second connecting pipe and the first connecting pipes. Fixed blocks are fixedly connected to the outer walls of the two sides of the first connecting pipes. First connecting frames are movably connected to the top of the fixed blocks. The bellows expansion joint can be uniformly stretched, the service life of the expansion joint is longer, the second inner pipes and the stop rods can be used in cooperation to prevent the corrugated pipes from being deformed, and the damper can prevent the corrugated pipes from being damaged due to rapid contraction or elongation.

Description

Technical Field

[0001] This invention relates to the field of expansion joint technology, specifically to a deformation-resistant compensating corrugated expansion joint. Background Technology

[0002] Expansion joints, also commonly known as compensators or expansion joints, consist of bellows and end pipes, supports, flanges, conduits, and other accessories that form their main working body. Expansion joints are flexible structures installed on container shells or pipelines to compensate for additional stress caused by temperature differences and mechanical vibrations. As an elastic compensating element that can freely expand and contract, expansion joints have advantages such as reliable operation, good performance, and compact structure, and have been widely used in chemical, metallurgical, and nuclear energy sectors.

[0003] However, when corrugated expansion joints are heated and stretched, one end of the joint is often pulled outward, resulting in uneven tension at both ends. This leads to uneven use of the joint and makes it prone to breakage when a certain part of the joint is subjected to greater stress. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a deformation-resistant compensating corrugated expansion joint, which mainly solves the problem that when existing corrugated expansion joints are heated and stretched, the uneven tension at both ends of the corrugated expansion joint leads to uneven use of the corrugated expansion joint, which easily causes damage to the corrugated expansion joint after the strength of a certain part is greater.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A deformation-resistant compensating corrugated expansion joint includes two first connecting pipes, two transport pipes, and a second connecting pipe. One end of each first connecting pipe is connected to and fixed with a first inner pipe. Both ends of each second connecting pipe are connected to and fixed with a second inner pipe, and the second inner pipe is sleeved on the outside of the first inner pipe and slidably connected to the first inner pipe. Corrugated pipes are installed between the two ends of the second connecting pipe and the first connecting pipe. Fixing blocks are fixedly connected to the outer walls of both sides of the first connecting pipe, and a first connecting frame is movably connected to the top of the fixing blocks. Fixing frames are fixedly connected to the outer walls of both sides of the second connecting pipe, and a first slider is movably connected to the top of the fixing frame. A side plate is fixedly connected to one end of the first slider, and grooves are formed at both ends of the side plate. A second slider is movably connected to the groove. A second connecting frame is movably connected to both sides of the fixing frame, and the second connecting frame is rotatably connected to the second slider. The first connecting frame is rotatably connected to the second connecting frame. Dampers are installed on both sides of the fixing frame, and the dampers are fixed to the side plates. An anti-deformation component is provided between the second connecting pipe and the first connecting pipe.

[0009] Furthermore, the anti-deformation component includes a stop bar, which is fixed to both ends of the second connecting pipe by bolts and is in contact with the corrugated pipe. The first connecting pipe has multiple slots inside, and the stop bar is slidably connected to the slots. One end of the stop bar is fixedly connected to a second tension spring, and the second tension spring is fixed to the slot.

[0010] Based on the aforementioned scheme, a first flange is installed at one end of the first connecting pipe, and a second flange is installed at one end of the transport pipe. The two adjacent first flanges and second flanges are detachably connected by bolts.

[0011] As a further embodiment of the present invention, the outer side of the transport pipe is fitted with a first protective shell and a second protective shell that are in contact with each other. The top of the first protective shell is fixedly connected to a second fixing plate. Both ends of the second fixing plate are provided with slots. The top outer wall of the second protective shell is fixedly connected to a first fixing plate, and the first fixing plate is in contact with the second fixing plate. The inside of the first fixing plate is provided with a sliding groove. Both ends of the sliding groove are movably connected to sliding rods. A first tension spring is fixedly connected between the two sliding rods. One end of the sliding rod extends out of the sliding groove and is fixedly connected to a connecting plate. One end of the connecting plate is fixedly connected to a locking block, and the locking block is inserted into the locking groove.

[0012] Furthermore, a groove is provided on one side of the first flange, and a second sealing ring is fixedly connected in the groove, with the second sealing ring in contact with the second flange.

[0013] Based on the aforementioned scheme, the bottom of the second flange is provided with a slope.

[0014] As a further embodiment of the present invention, a tapered tube is installed at one end of the transport tube, and a first sealing ring is fixedly connected to the outside of the tapered tube, and the first sealing ring is in contact with the inclined surface.

[0015] Furthermore, one end of the stop bar located inside the slot is integrally formed with a baffle, and the baffle slides inside the slot, with the diameter of the baffle being larger than the diameter of the slot opening.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a deformation-resistant compensating corrugated expansion joint, which has the following beneficial effects:

[0018] 1. Through the combined use of the side plate, the first connecting frame, and the second connecting frame, the bellows is stretched evenly when heated and contracted evenly when cooled. This allows the bellows expansion joint to stretch evenly, preventing damage caused by uneven stretching and extending its service life, thus improving the effectiveness of the device.

[0019] 2. In this invention, the first protective shell and the second protective shell can protect the connection between the first flange and the second flange, preventing the connecting screws from being corroded by rainwater for a long time and causing them to rust. At the same time, it is convenient for workers to remove and install the first protective shell and the second protective shell, making the operation easier and the protective structure more convenient to use.

[0020] 3. By using the second inner tube and the stop bar in combination, the present invention can restrict the bellows, prevent the bellows from easily deforming, and improve the restrictive effect of the device.

[0021] 4. In this invention, the damper can buffer the side plate and prevent the bellows from being damaged by rapid contraction or elongation.

[0022] 5. In this invention, the baffle can limit the distance the stop bar can move, preventing the stop bar from moving out of the slot and affecting the use of the device. The second sealing ring makes the connection between the first flange and the second flange tighter. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0024] Figure 2 This is a schematic cross-sectional view of the first fixing plate of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0025] Figure 3 This is a partial cross-sectional view of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0026] Figure 4 This is a schematic cross-sectional view of the second flange structure of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0027] Figure 5 This is a schematic cross-sectional view of the first connecting pipe of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0028] Figure 6 This is a partially enlarged structural diagram of a deformation-resistant compensating corrugated expansion joint proposed in this invention.

[0029] Figure 7 This is a schematic cross-sectional view of the bellows structure of a deformation-resistant compensating bellows expansion joint proposed in this invention.

[0030] In the diagram: 1. First protective shell; 2. Second protective shell; 3. First fixing plate; 4. Second fixing plate; 5. Transport pipe; 6. Locking block; 7. Connecting plate; 8. Sliding rod; 9. Sliding groove; 10. First tension spring; 11. First flange; 12. First connecting pipe; 13. Corrugated pipe; 14. Second connecting pipe; 15. Stop bar; 16. Second flange; 17. Tapered pipe; 18. Inclined surface; 19. First sealing ring; 20. Second sealing ring; 21. Groove; 22. Second tension spring; 23. Baffle; 24. Slot; 25. First connecting frame; 26. Second connecting frame; 27. Damper; 28. First slider; 29. ​​Side plate; 30. Groove; 31. Second slider; 32. Fixing frame; 33. Fixing block; 34. First inner tube; 35. Second inner tube; 36. Locking groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Reference Figures 1-7A deformation-resistant compensating corrugated expansion joint includes two first connecting pipes 12, two transport pipes 5, and a second connecting pipe 14. One end of each first connecting pipe 12 is connected to and fixed with a first inner pipe 34. Both ends of each second connecting pipe 14 are connected to and fixed with second inner pipes 35, with the second inner pipes 35 sleeved on the outside of the first inner pipes 34 and slidably connected to them. Corrugated pipes 13 are installed between each end of the second connecting pipe 14 and the first connecting pipe 12. Fixing blocks 33 are bolted to the outer walls of both sides of each first connecting pipe 12. The top of the second connecting pipe 14 is rotatably connected to a first connecting frame 25. Both outer walls of the second connecting pipe 14 are fixed with fixing frames 32. The top of the fixing frame 32 is slidably connected to a first slider 28. One end of the first slider 28 is fixed with a side plate 29 by bolts. Both ends of the side plate 29 have grooves 30, and a second slider 31 is slidably connected within the grooves 30. Both sides of the fixing frame 32 are rotatably connected to second connecting frames 26, and the second connecting frames 26 are rotatably connected to the second slider 31. The first connecting frame 25 is rotatably connected to the second connecting frame 26. The two sides of the fixing frame 32... Dampers 27 are installed on both sides and are fixed to the side plates 29. The dampers 27 can buffer the side plates 29 and prevent damage caused by rapid contraction or elongation of the bellows 13. An anti-deformation component is provided between the second connecting pipe 14 and the first connecting pipe 12. When the expansion joint is heated and the bellows 13 deforms, the elongated bellows 13 can push the first connecting pipe 12 to move outward. At this time, sliding occurs between the first inner pipe 34 and the second inner pipe 35. The movement of the first connecting pipe 12 causes the fixing block 33 to move outward, thereby causing the first connecting frame 2 to move outward. 5. The second connecting frame 26 pulls the side plate 29 downward through the second slider 31. At this time, the first connecting frame 25 and the second connecting frame 26 rotate. The second slider 31 slides along the groove 30. At the same time, the side plate 29 moves downward, causing the first slider 28 to move inward along the fixed frame 32. The damper 27 buffers it. Since the two bellows 13 are connected to the same side plate 29, they generate mutual forces. Therefore, the movement of the side plate 29 causes the other bellows 13 to stretch and deform synchronously according to the above principle, thereby making the bellows expansion joint stretch evenly.

[0033] In particular, the anti-deformation component includes a stop bar 15, which is fixed to both ends of the second connecting pipe 14 by bolts and is in contact with the bellows 13. The second inner pipe 35 cooperates with the stop bar 15 to restrict the bellows 13 and prevent it from easily deforming. The first connecting pipe 12 has multiple slots 24 inside, and the stop bar 15 is slidably connected to the slots 24. A second tension spring 22 is welded to one end of the stop bar 15 and is fixed to the slots 24. When the bellows 13 elongates, the first inner pipe 34 and the second inner pipe 35 slide and lengthen, thereby increasing the distance between the first connecting pipe 12 and the second connecting pipe 14. At this time, the relative position of the stop bar 15 in the slot 24 changes, and the second tension spring 22 elongates.

[0034] It should be noted that a first flange 11 is installed at one end of the first connecting pipe 12, and a second flange 16 is installed at one end of the transport pipe 5. The two adjacent first flanges 11 and second flanges 16 are detachably connected by bolts. A first protective shell 1 and a second protective shell 2, which are in contact with each other, are fitted onto the outside of the transport pipe 5. The first protective shell 1 and the second protective shell 2 can protect the connection between the first flange 11 and the second flange 16, preventing the connecting screws from rusting due to prolonged exposure to rainwater. The top of the first protective shell 1 is fixed with bolts. The second fixing plate 4 has slots 36 at both ends. The top outer wall of the second protective shell 2 is fixed with a first fixing plate 3 by bolts, and the first fixing plate 3 is in contact with the second fixing plate 4. The first fixing plate 3 has a sliding groove 9 inside, and sliding rods 8 are slidably connected to both ends of the sliding groove 9. A first tension spring 10 is welded between the two sliding rods 8. One end of the sliding rod 8 extends out of the sliding groove 9 and is fixed with a connecting plate 7 by bolts. One end of the connecting plate 7 is fixed with a locking block 6 by bolts, and the locking block 6 is inserted into the slot 36. When it is necessary to connect the first protective shell 1 and the second protective shell... 2. During disassembly, pull the two connecting plates 7 outwards respectively, causing the slide rod 8 to move outwards along the slide groove 9, and the first tension spring 10 to extend until the connecting plate 7 drives the locking block 6 to completely move out of the locking groove 36, thus facilitating the removal of the first protective shell 1 and the second protective shell 2 by the staff. A groove 21 is provided on one side of the first flange 11, and a second sealing ring 20 is adhered in the groove 21. The second sealing ring 20 contacts the second flange 16, making the connection between the first flange 11 and the second flange 16 tighter. A groove is provided at the bottom of the second flange 16. The inclined surface 18 has a tapered tube 17 installed at one end of the transport pipe 5. A first sealing ring 19 is bonded to the outside of the tapered tube 17 and is in contact with the inclined surface 18. The first sealing ring 19 makes the connection between the second flange 16 and the tapered tube 17 tighter. A baffle 23 is integrally formed at one end of the stop rod 15 located in the groove 24 and slides in the groove 24. The diameter of the baffle 23 is larger than the diameter of the opening of the groove 24. The baffle 23 can limit the distance of movement of the stop rod 15 and prevent the stop rod 15 from moving out of the groove 24 and affecting the use effect of the device.

[0035] The working principle of this embodiment is as follows: When the expansion joint is heated and the bellows 13 deforms, the bellows 13 becomes longer and can push the first connecting pipe 12 to move outward. At this time, the first inner pipe 34 and the second inner pipe 35 slide together. The movement of the first connecting pipe 12 causes the fixing block 33 to move outward, thereby causing the first connecting frame 25 and the second connecting frame 26 to pull the side plate 29 downward through the second slider 31. At this time, the first connecting frame 25 and the second connecting frame 26 rotate. The second slider 31 slides along the groove 30. At the same time, the side plate 29 moves downward and causes the first slider 28 to move inward along the fixing frame 32. The damper 27 buffers it. Since the two bellows 13 are connected to the same side plate 29, they generate mutual forces. Therefore, the movement of the side plate 29 causes the other bellows 13 to stretch and deform synchronously according to the above principle, thereby making the bellows expansion joint stretch evenly.

[0036] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0037] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections, mechanical connections, electrical connections, or direct connections. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0038] In the description herein, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deformation-resistant compensating corrugated expansion joint, comprising two first connecting pipes (12), two transport pipes (5), and a second connecting pipe (14), characterized in that, One end of the first connecting pipe (12) is connected to and fixed with a first inner pipe (34). Both ends of the second connecting pipe (14) are connected to and fixed with a second inner pipe (35). The second inner pipe (35) is sleeved on the outside of the first inner pipe (34) and slidably connected to the first inner pipe (34). Corrugated pipes (13) are respectively installed between the two ends of the second connecting pipe (14) and the first connecting pipe (12). Fixing blocks (33) are fixedly connected to both outer walls of the first connecting pipe (12). A first connecting frame (25) is movably connected to the top of the fixing blocks (33). Fixing frames (32) are fixed to both outer walls of the second connecting pipe (14). A first slider (28) is movably connected to the top of the fixing frames (32). A side plate (29) is fixedly connected to one end of the first slider (28). A groove (30) is opened at both ends of the side plate (29). A second slider (31) is movably connected in the groove (30). The fixed frame (32) is movably connected to the two sides of the second connecting frame (26), and the second connecting frame (26) is rotatably connected to the second slider (31). The first connecting frame (25) is rotatably connected to the second connecting frame (26). The fixed frame (32) is equipped with dampers (27) on both sides, and the dampers (27) are fixed to the side plate (29). The second connecting pipe (14) and the first connecting pipe (12) are provided with an anti-deformation component. The anti-deformation component includes a stop rod (15). The stop rod (15) is fixed to both ends of the second connecting pipe (14) by bolts, and the stop rod (15) is in contact with the corrugated pipe (13). The first connecting pipe (12) has multiple slots (24) inside, and the stop rod (15) is slidably connected to the slots (24). One end of the stop rod (15) is fixedly connected to a second tension spring (22), and the second tension spring (22) is fixed to the slots (24).

2. The anti-deformation compensating corrugated expansion joint according to claim 1, characterized in that, One end of the first connecting pipe (12) is equipped with a first flange (11), and one end of the transport pipe (5) is equipped with a second flange (16). The two adjacent first flanges (11) and second flanges (16) are detachably connected by bolts.

3. The anti-deformation compensating corrugated expansion joint according to claim 1, characterized in that, The transport pipe (5) is sleeved with a first protective shell (1) and a second protective shell (2) that are in contact with each other. The top of the first protective shell (1) is fixedly connected to a second fixing plate (4). Both ends of the second fixing plate (4) are provided with slots (36). The top outer wall of the second protective shell (2) is fixedly connected to a first fixing plate (3), and the first fixing plate (3) is in contact with the second fixing plate (4). The inside of the first fixing plate (3) is provided with a sliding groove (9). Both ends of the sliding groove (9) are movably connected to sliding rods (8). A first tension spring (10) is fixedly connected between the two sliding rods (8). One end of the sliding rod (8) extends out of the sliding groove (9) and is fixedly connected to a connecting plate (7). One end of the connecting plate (7) is fixedly connected to a locking block (6), and the locking block (6) is inserted into the locking groove (36).

4. The anti-deformation compensating corrugated expansion joint according to claim 2, characterized in that, A groove (21) is provided on one side of the first flange (11), and a second sealing ring (20) is fixedly connected in the groove (21), and the second sealing ring (20) is in contact with the second flange (16).

5. The anti-deformation compensating corrugated expansion joint according to claim 2, characterized in that, The bottom of the second flange (16) is provided with a bevel (18).

6. The anti-deformation compensating corrugated expansion joint according to claim 5, characterized in that, One end of the transport pipe (5) is fitted with a tapered pipe (17), and a first sealing ring (19) is fixedly connected to the outside of the tapered pipe (17), and the first sealing ring (19) is in contact with the inclined surface (18).

7. The anti-deformation compensating corrugated expansion joint according to claim 1, characterized in that, The stop bar (15) has a baffle (23) integrally formed at one end inside the slot (24), and the baffle (23) slides inside the slot (24). The diameter of the baffle (23) is larger than the diameter of the opening of the slot (24).

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