A synchronous adjustment type expansion joint

Abstract

The application discloses a synchronous adjusting type expansion joint based on a bellows, the upper and lower ends of the bellows are fixedly connected with connecting pipes, the outer walls of the two connecting pipes are fixedly provided with connecting flanges, the outer wall of the connecting flange on the lower side is fixedly connected with a plurality of connecting plates, the side wall of the connecting plate is rotationally connected with a threaded rod, the outer wall of the connecting flange on the upper side is fixedly connected with a threaded plate matched with the threaded rod, when in use, the cooperation of the connecting plate, the threaded rod, the threaded plate and the anti-torsion assembly can offset part of the torsion applied to the expansion joint during the working process of the expansion joint, and when the torsion applied to the expansion joint is too large, the two ends of the expansion joint can be relatively fixed, so that the problem that the expansion joint is damaged due to the large torsion can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of expansion joints, in particular to a synchronous adjustment type expansion joint. BACKGROUND

[0002] An expansion joint is a flexible element that can effectively compensate for axial deformation, such as an expansion joint axially flexible and easily deformed welded on the fixed tube sheet heat exchanger shell, which can compensate for the thermal expansion difference between the pipe and the shell due to different wall temperatures, reduce their axial load, thereby reducing the temperature difference stress of the pipe, tube sheet and shell, avoiding causing strength damage, instability damage and pipe pull-out damage. There are many types of expansion joints, commonly used are wave-shaped, ring plate welded and clamped shell type structures, among which the wave-shaped expansion joint is the most widely used, and the synchronous adjustment type expansion joint is a device used for compensating thermal expansion and absorbing displacement in a piping system, which can synchronously adjust the length of the expansion joint to better adapt to the operation requirements of the pipeline.

[0003] The existing expansion joint, when the flow rate of the medium in the pipeline is too fast, the flow direction changes suddenly, or there are "gas-liquid two-phase flow" and "solid particles" in the medium, will produce uneven impact force on the inner wall of the pipeline. If the "resultant direction" of the impact force has an angle with the pipeline axis, it will cause "torsional vibration" of the pipeline, and then the torsion will be transmitted to the expansion joint. The bellows of the expansion joint has poor torsional resistance, and when the torsion is too large, it will cause micro-cracks in the bellows. Moreover, when the expansion joint works for a long time, the micro-cracks will gradually expand, causing the medium in the expansion joint to seep out and cause accidents. SUMMARY

[0004] In view of the problems existing in the prior art, the present application is proposed.

[0005] Therefore, the present application aims to provide a synchronous adjustment type expansion joint, which solves the problem that when the expansion joint is subjected to a large torsion, micro-cracks will occur in the bellows, and when the expansion joint works for a long time, the micro-cracks will gradually expand, causing the medium in the expansion joint to seep out and cause accidents.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A kind of synchronous adjustment type expansion joint based on, including bellows, the port of the upper and lower ends of the bellows is fixedly connected with connecting pipe, the outer wall of two connecting pipes is fixedly sleeved with connecting flange, the outer wall of the connecting flange located in lower side is fixedly connected with multiple connecting plates, the side wall of the connecting plate is rotatably connected with threaded rod, the outer wall of the connecting flange located in upper side is fixedly connected with the threaded plate matched with threaded rod, the lower end of the threaded rod passes through connecting plate, and is fixedly connected with screw block, the outer wall of the connecting pipe located in lower side is rotatably connected with transmission gear ring by bearing, the rod wall of the threaded rod is fixedly sleeved with transmission gear meshed with transmission gear ring, anti-torsion component is arranged between two connecting pipes, the side wall of two connecting flanges is equipped with sealing detection component, protective component is arranged in the connecting pipe located in upper side.

[0007] As a preferred scheme of the synchronous adjustment type expansion joint based on the present application, wherein: the anti-torsion component includes a guide frame fixedly connected to the upper connecting pipe wall, both the guide frames are U-shaped structures and are installed longitudinally on the wall of the upper connecting pipe, the outer wall of both the guide frames is slidably provided with a guide sleeve, the side wall of the opposite side of both the guide sleeves is fixedly connected with the same guide rod, the rod wall of the guide rod is slidably sleeved with a horizontal movement sleeve and two push rings, both the push rings are respectively located on the left and right sides of the horizontal movement sleeve, the same spring is fixedly connected between the push ring and the guide sleeve, the side wall of the horizontal movement sleeve is fixedly connected with a connecting frame, the connecting frame is L-shaped, and the lower end of the connecting frame is connected with the lower connecting pipe.

[0008] As a preferred scheme of the synchronous adjustment type expansion joint based on the present application, wherein: the side wall of the connecting frame is fixedly connected with a small electric push rod, the moving end of the small electric push rod passes through the connecting frame and is fixedly connected with an upper tooth plate, the wall of the upper connecting pipe is fixedly connected with a lower tooth plate meshed with the upper tooth plate, the side wall of the push ring is fixedly connected with a bent rod, the outer wall of the guide sleeve is fixedly connected with a trigger switch, the trigger switch is electrically connected with a controller, and the controller is installed on the wall of the upper connecting pipe.

[0009] As a preferred scheme of the synchronous adjustment type expansion joint based on the present application, wherein: the sealing detection component includes a rubber ring fixedly connected to the side wall of the connecting flange away from the bellows, the side wall of the connecting flange away from the rubber ring is fixedly connected with an analysis cylinder, the side wall of the analysis cylinder close to the connecting flange is fixedly connected with an inlet pipe, the inlet pipe penetrates through the connecting flange, the inner wall of the analysis cylinder is connected with a piston plate through a spring, the side wall of the piston plate away from the spring is fixedly connected with a display column, and the end of the analysis cylinder away from the inlet pipe is of an open structure.

[0010] As a preferred scheme of the synchronous adjustment type expansion joint, the protection assembly comprises two fixed blocks fixedly connected to the inner wall of the upper connecting pipe, the side wall of the fixed block is hingedly connected with a protection plate, the side wall of the protection plate away from the fixed block is fixedly connected with an arc-shaped rod, an arc-shaped sleeve is fixedly inserted into the pipe wall of the upper connecting pipe, and the arc-shaped sleeve and the arc-shaped rod are fixedly connected with the same spring.

[0011] As a preferred scheme of the synchronous adjustment type expansion joint, the protection assembly comprises two fixed blocks fixedly connected to the inner wall of the upper connecting pipe, the side wall of the fixed block is hingedly connected with a protection plate, the side wall of the protection plate away from the fixed block is fixedly connected with an arc-shaped rod, an arc-shaped sleeve is fixedly inserted into the pipe wall of the upper connecting pipe, and the arc-shaped sleeve and the arc-shaped rod are fixedly connected with the same spring.

[0012] As a preferred scheme of the synchronous adjustment type expansion joint, the protection assembly comprises two fixed blocks fixedly connected to the inner wall of the upper connecting pipe, the side wall of the fixed block is hingedly connected with a protection plate, the side wall of the protection plate away from the fixed block is fixedly connected with an arc-shaped rod, an arc-shaped sleeve is fixedly inserted into the pipe wall of the upper connecting pipe, and the arc-shaped sleeve and the arc-shaped rod are fixedly connected with the same spring.

[0013] As a preferred scheme of the synchronous adjustment type expansion joint, the protection assembly comprises two fixed blocks fixedly connected to the inner wall of the upper connecting pipe, the side wall of the fixed block is hingedly connected with a protection plate, the side wall of the protection plate away from the fixed block is fixedly connected with an arc-shaped rod, an arc-shaped sleeve is fixedly inserted into the pipe wall of the upper connecting pipe, and the arc-shaped sleeve and the arc-shaped rod are fixedly connected with the same spring.

[0014] In summary, the present application has at least one of the following beneficial effects:

[0015] 1、The present application, through the cooperation of the connecting plate, the threaded rod, the threaded plate and the anti-torsion assembly, can offset part of the torsion applied to the expansion joint during the operation of the expansion joint, and when the torsion applied to the expansion joint is too large, the two ends of the expansion joint can be relatively fixed to avoid the problem that the expansion joint is damaged by the large torsion.

[0016] 2、The present application, through the cooperation of the connecting plate, the threaded rod, the threaded plate, the twisting block, the transmission gear ring and the transmission gear, not only further improves the anti-torsion capability of the expansion joint, but also synchronously adjusts the plurality of threaded rods on the surface of the expansion joint to limit the movement range of the expansion joint.

[0017] 3、The present application, by setting the external pipeline, mounting flange, annular groove, annular storage box, small pump machine, annular pipe and elbow, when the sealing surface between the expansion joint and the external pipeline leaks, the leakage can be plugged in time, providing time for subsequent personnel to remedy, avoiding the problem of serious leakage of the expansion joint. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 The structural schematic diagram of the present application is shown in the figure.

[0020] Figure 2 The surface structure schematic diagram of the external pipeline of the present application is shown in the figure.

[0021] Figure 3 The internal structure schematic diagram of the analysis cylinder of the present application is shown in the figure.

[0022] Figure 4 The position relationship schematic diagram of the rubber sleeve of the present application is shown in the figure.

[0023] Figure 5 The structure schematic diagram of the protection assembly of the present application is shown in the figure.

[0024] Figure 6 The structure schematic diagram of the anti-torsion assembly of the present application is shown in the figure.

[0025] Figure 7 The position relationship schematic diagram of the upper tooth plate and the lower tooth plate of the present application is shown in the figure.

[0026] Explanation of reference signs:

[0027] 1 corrugated pipe, 2 connecting pipe, 3 connecting flange, 4 connecting plate, 5 threaded rod, 6 threaded plate, 7 twisting block, 8 transmission tooth ring, 9 transmission gear, 10 anti-torsion assembly, 101 guide frame, 102 guide sleeve, 11 guide rod, 12 pushing ring, 13 horizontal moving sleeve, 14 connecting frame, 15 small electric push rod, 16 upper tooth plate, 17 lower tooth plate, 18 bending rod, 19 trigger switch, 20 sealing detection assembly, 201 rubber ring, 202 analysis cylinder, 21 inlet pipe, 22 piston plate, 23 display column, 24 protection assembly, 241 fixed block, 242 protection plate, 25 arc-shaped rod, 26 arc-shaped sleeve, 27 external pipeline, 28 mounting flange, 29 annular groove, 30 annular storage box, 31 small pump machine, 32 annular pipe, 33 elbow, 34 rubber sleeve, 35 indicator light, 36 controller. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0029] The embodiment of the present application discloses a synchronous adjustment type expansion joint.

[0030] Embodiment 1

[0031] Reference Figures 1-7 For the first embodiment of the present application, a synchronous adjustment type expansion joint is provided, which comprises a bellows 1, a rubber sleeve 34 is fixedly sleeved on the wall of the bellows 1, the upper and lower ends of the bellows 1 are fixedly connected with a connecting pipe 2, the outer walls of the two connecting pipes 2 are fixedly sleeved with a connecting flange 3, the outer wall of the lower connecting flange 3 is fixedly connected with a plurality of connecting plates 4, the side wall of the connecting plate 4 is rotatably connected with a threaded rod 5, the outer wall of the upper connecting flange 3 is fixedly connected with a threaded plate 6 matched with the threaded rod 5, the lower end of the threaded rod 5 penetrates through the connecting plate 4 and is fixedly connected with a twisting block 7, the outer wall of the lower connecting pipe 2 is rotatably connected with a transmission gear ring 8 through a bearing, the rod wall of the threaded rod 5 is fixedly sleeved with a transmission gear 9 engaged with the transmission gear ring 8, an anti-torsion assembly 10 is arranged between the two connecting pipes 2, the side walls of the two connecting flanges 3 are provided with a sealing detection assembly 20, and a protection assembly 24 is arranged in the upper connecting pipe 2.

[0032] The anti-torsion assembly 10 comprises a guide frame 101 fixedly connected to the wall of the upper connecting pipe 2, both of the guide frames 101 are in U-shaped structure and are longitudinally arranged on the wall of the upper connecting pipe 2, the outer wall of each of the guide frames 101 is slidably provided with a guide sleeve 102, the side walls of the two guide sleeves 102 are fixedly connected with a same guide rod 11, the rod wall of the guide rod 11 is slidably sleeved with a transverse sleeve 13 and two push rings 12, the two push rings 12 are respectively located on the left and right sides of the transverse sleeve 13, a same spring is fixedly connected between the push ring 12 and the guide sleeve 102, the side wall of the transverse sleeve 13 is fixedly connected with a connecting frame 14, the connecting frame 14 is in L-shaped structure, the lower end of the connecting frame 14 is connected with the lower connecting pipe 2, the side wall of the connecting frame 14 is fixedly connected with a small electric push rod 15, the moving end of the small electric push rod 15 penetrates through the connecting frame 14 and is fixedly connected with an upper toothed plate 16, the wall of the upper connecting pipe 2 is fixedly connected with a lower toothed plate 17 which is in mesh with the upper toothed plate 16, the side wall of the push ring 12 is fixedly connected with a bent rod 18, the outer wall of the guide sleeve 102 is fixedly connected with a trigger switch 19, the trigger switch 19 is electrically connected with a controller 36, the controller 36 is arranged on the wall of the upper connecting pipe 2, the wall of the lower connecting pipe 2 is fixedly connected with an indicator lamp 35, the indicator lamp 35 is electrically connected with the controller 36, and the anti-torsion capacity of the expansion joint is improved.

[0033] The sealing detection assembly 20 comprises a rubber ring 201 fixedly connected to the side wall of the connecting flange 3 away from the bellows 1, the side wall of the connecting flange 3 away from the rubber ring 201 is fixedly connected with an analysis cylinder 202, the side wall of the analysis cylinder 202 close to the connecting flange 3 is fixedly connected with an inlet pipe 21, the inlet pipe 21 penetrates through the connecting flange 3, the inner wall of the analysis cylinder 202 is connected with a piston plate 22 through a spring, the side wall of the piston plate 22 away from the spring is fixedly connected with a display column 23, and the end of the analysis cylinder 202 away from the inlet pipe 21 is in open structure, so that the sealing condition of the expansion joint can be detected.

[0034] The protection assembly 24 comprises two fixed blocks 241 fixedly connected to the inner wall of the upper connecting pipe 2, the side wall of the fixed block 241 is hingedly connected with a protection plate 242, the side wall of the protection plate 242 away from the fixed block 241 is fixedly connected with an arc-shaped rod 25, an arc-shaped sleeve 26 is fixedly inserted into the wall of the upper connecting pipe 2, a same spring is fixedly connected between the arc-shaped sleeve 26 and the arc-shaped rod 25, the medium flows into the upper connecting pipe 2 and flows out of the lower connecting pipe 2, and the damage of the water hammer effect and the air hammer effect to the expansion joint can be avoided.

[0035] Two connecting flanges 3 are provided with external pipes 27 away from one side of the bellows 1, the pipe wall of the external pipe 27 is fixedly sleeved with a mounting flange 28, the side wall of the mounting flange 28 is provided with an annular groove 29 matched with the rubber ring 201, the side wall of the connecting flange 3 and the mounting flange 28 is provided with a bolt mounting hole, the pipe wall of the external pipe 27 is fixedly sleeved with an annular storage box 30, the outer wall of the annular storage box 30 is fixedly communicated with a small pump 31, the feeding end of the small pump 31 is communicated with the annular storage box 30, the discharging end of the small pump 31 is fixedly communicated with an annular pipe 32, the pipe wall of the annular pipe 32 is fixedly communicated with a plurality of elbow pipes 33, one end of the elbow pipe 33 away from the annular pipe 32 penetrates through the mounting flange 28, and the outlet faces the rubber ring 201.

[0036] Before the expansion joint is installed to the pipeline, the operator needs to rotate one of the knobs 7 by a wrench, the knob 7 drives one of the threaded rods 5 to rotate, in the process of rotation, the threaded rod 5 drives the transmission gear 9 on the surface thereof to rotate, in the process of rotation, the transmission gear 9 drives the transmission gear ring 8 to rotate, the transmission gear ring 8 drives the other transmission gears 9 to rotate, thereby driving the other threaded rods 5 to rotate together, through the cooperation of the threaded rods 5 and the threaded plates 6, the distance between the upper and lower connecting flanges 3 can be controlled, thereby adjusting the limiting distance of the expansion joint;

[0037] Then the two connecting flanges 3 and the mounting flange 28 on the surface of the external pipe 27 are connected by bolts, thereby connecting the expansion joint and the external pipe 27, when the medium flow rate in the external pipe 27 is too fast, the flow direction is suddenly changed, or there are "gas-liquid two-phase flow" and "solid particles" in the medium, the non-uniform impact force is generated on the inner wall of the external pipe 27, the "resultant direction" of the impact force has an angle with the axis of the external pipe 27, which can cause the "torsional vibration" of the external pipe 27, and then the torsion is transmitted to the expansion joint, and the bellows 1 in the middle part of the expansion joint has poor torsional resistance, under the action of the torsional force, the connecting pipes 2 on the upper and lower sides relatively rotate, the connecting pipe 2 on the lower side drives the horizontal moving sleeve 13 to move through the connecting frame 14, the horizontal moving sleeve 13 extrudes the push ring 12 on one side, and the spring between the push ring 12 and the guide sleeve 102 can offset the torsional force to a certain extent, when the torsional force is too large, the horizontal moving sleeve 13 drives the push ring 12 and the bent rod 18 on the side to extrude the trigger switch 19 on the side, the trigger switch 19 controls the small electric push rod 15 to work through the controller 36, the small electric push rod 15 drives the upper toothed plate 16 to move to the set position in the direction of the lower toothed plate 17, so that the upper toothed plate 16 and the lower toothed plate 17 are in contact, thereby fixing the horizontal position of the two connecting pipes 2, and the vertical position of the two connecting pipes 2 can still change, so that the expansion joint has a corresponding compensation effect;

[0038] When the sealing element between the connecting flange 3 and the mounting flange 28 fails due to wear, the medium conveyed in the outer pipeline 27 will leak from the worn part. Since the leakage point is located inside the rubber ring 201, part of the medium will be conveyed into the analysis cylinder 202 through the inlet pipe 21 under the action of pressure, causing the pressure on one side of the piston plate 22 to increase. Under the action of pressure, the piston plate 22 will drive the display column 23 to extend out of the analysis cylinder 202. The analysis cylinder 202 is internally provided with a position switch. After the controller 36 detects this change through the position switch, it will control the small pump 31 to work. Moreover, it will send this signal to the receiving end through the wireless sending module. The small pump 31 will convey the repair agent (the repair agent is composed of high-molecular synthetic resin and modified curing agent) stored in the annular storage box 30 to the annular pipe 32 and spray it to the rubber ring 201 through the multiple elbow pipes 33, thereby filling the gap between the rubber ring 201 and the annular groove 29 and further enhancing the sealing performance of the rubber ring 201 to avoid leakage of the medium, thereby providing time for subsequent maintenance personnel.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A synchronous-regulation-based expansion joint, characterized by: The utility model relates to a corrugated pipe (1), the upper and lower ends of the corrugated pipe (1) are fixedly connected with the connecting pipe (2), the outer wall of two connecting pipes (2) is fixedly sleeved with the connecting flange (3), the outer wall of the connecting flange (3) at the lower side is fixedly connected with a plurality of connecting plates (4), the side wall of connecting plate (4) is rotatably connected with threaded rod (5), the outer wall of the connecting flange (3) at the upper side is fixedly connected with the screw plate (6) matched with threaded rod (5), the lower end of threaded rod (5) passes through connecting plate (4) and is fixedly connected with the screw block (7), the outer wall of the connecting pipe (2) at the lower side is rotatably connected with the transmission gear ring (8) through the bearing, the rod wall of threaded rod (5) is fixedly sleeved with the transmission gear (9) that is mutually engaged with transmission gear ring (8), and the anti-torque assembly (10) is arranged between two connecting pipes (2), the side wall of two connecting flanges (3) is equipped with sealing detection subassembly (20), and the protection assembly (24) is arranged in the connecting pipe (2) at the upper side; The anti-torque assembly (10) includes a guide frame (101) fixedly connected to the pipe wall of the upper connecting pipe (2), both the guide frames (101) are U-shaped structures and are installed longitudinally on the pipe wall of the upper connecting pipe (2), guide sleeves (102) are slidably arranged on the outer walls of both the guide frames (101), a same guide rod (11) is fixedly connected to the side walls of the opposite sides of both the guide sleeves (102), a horizontal movement sleeve (13) and two push rings (12) are slidably sleeved on the rod wall of the guide rod (11), both the push rings (12) are located on the left and right sides of the horizontal movement sleeve (13), a same spring is fixedly connected between the push ring (12) and the guide sleeve (102), a connecting frame (14) is fixedly connected to the side wall of the horizontal movement sleeve (13), the connecting frame (14) is an L-shaped structure, and the lower end of the connecting frame (14) is connected to the lower connecting pipe (2); A small electric push rod (15) is fixedly connected to the side wall of the connecting frame (14), the moving end of the small electric push rod (15) penetrates through the connecting frame (14) and is fixedly connected with an upper toothed plate (16), a lower toothed plate (17) that is mutually engaged with the upper toothed plate (16) is fixedly connected to the pipe wall of the upper connecting pipe (2), a bent rod (18) is fixedly connected to the side wall of the push ring (12), a trigger switch (19) is fixedly connected to the outer wall of the guide sleeve (102), the trigger switch (19) is electrically connected with a controller (36), and the controller (36) is installed on the pipe wall of the upper connecting pipe (2).

2. The synchronous-regulation-based expansion joint according to claim 1, characterized by, The sealing detection assembly (20) comprises a rubber ring (201) fixedly connected to the side wall of the connecting flange (3) away from the corrugated pipe (1), a cylinder (202) fixedly connected to the side wall of the connecting flange (3) away from the rubber ring (201), an inlet pipe (21) fixedly communicated to the side wall of the cylinder (202) close to the connecting flange (3), the inlet pipe (21) penetrating through the connecting flange (3), a piston plate (22) connected to the inner wall of the cylinder (202) through a spring, a display column (23) fixedly connected to the side wall of the piston plate (22) away from the spring, and the cylinder (202) being of an open structure away from the inlet pipe (21).

3. The synchronous-regulation-based expansion joint according to claim 1, characterized by, The protection assembly (24) comprises two fixed blocks (241) fixedly connected to the inner wall of the upper connecting pipe (2), a protection plate (242) hinged to the side wall of the fixed block (241), an arc-shaped rod (25) fixedly connected to the side wall of the protection plate (242) away from the fixed block (241), an arc-shaped sleeve (26) fixedly inserted into the pipe wall of the upper connecting pipe (2), and a spring fixedly connected between the arc-shaped sleeve (26) and the arc-shaped rod (25), the medium flowing into the upper connecting pipe (2) and flowing out of the lower connecting pipe (2).

4. The synchronous-regulation-based expansion joint according to claim 2, characterized by, The two connecting flanges (3) away from the corrugated pipe (1) are provided with external pipes (27), the pipe wall of the external pipe (27) is fixedly provided with a mounting flange (28), the side wall of the mounting flange (28) is provided with an annular groove (29) matched with the rubber ring (201), the side walls of the connecting flange (3) and the mounting flange (28) are provided with bolt mounting holes, the pipe wall of the external pipe (27) is fixedly provided with an annular storage box (30), the outer wall of the annular storage box (30) is fixedly communicated with a small pump (31), the feeding end of the small pump (31) is communicated with the annular storage box (30), the discharging end of the small pump (31) is fixedly communicated with an annular pipe (32), the pipe wall of the annular pipe (32) is fixedly communicated with a plurality of elbow pipes (33), one end of the elbow pipe (33) away from the annular pipe (32) penetrates through the mounting flange (28), and the outlet faces the rubber ring (201).

5. The synchronous-regulation-based expansion joint of claim 1, wherein, The pipe wall of the corrugated pipe (1) is fixedly provided with a rubber sleeve (34).

6. The synchronous-regulation-based expansion joint of claim 1, wherein, The pipe wall of the lower connecting pipe (2) is fixedly connected with an indicator lamp (35), and the indicator lamp (35) is electrically connected with a controller (36). The pipe wall of the lower connecting pipe (2) is fixedly connected with an indicator lamp (35), and the indicator lamp (35) is electrically connected with a controller (36).

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