Synchronous adjustment type expansion joint

Abstract

The invention relates to the field of expansion joints, in particular to a synchronous adjusting type expansion joint which comprises an expansion joint piece, the expansion joint piece comprises a corrugated pipe, connecting rings are fixedly connected to the two ends of the corrugated pipe, a middle ring and an outlet end are fixedly connected to the ends, away from the corrugated pipe, of the connecting rings correspondingly, and an elastic pipe film is arranged on the inner side of the corrugated pipe; the two ends of the elastic pipe film are fixedly connected with the middle ring and the outlet end correspondingly, a lining pipe is arranged on the inner side of the elastic pipe film, the end, away from the connecting ring, of the middle ring is fixedly connected with a connecting section, and the end, away from the middle ring, of the connecting section is fixedly connected with the inlet end. The connecting section is connected with the outlet part of the steam generation kettle, so that overlarge pressure at the outlet part of the steam generation kettle due to pipe diameter change is avoided, and meanwhile, the lining pipe is prolonged, so that the welding part of the lining pipe is positioned in the middle of the connecting section, and additional impact on the sealing part of the connecting flange caused by turbulent flow and pressure difference at the position is avoided.

Description

Technical Field

[0001] The invention relates to the field of expansion joints, and in particular to a synchronously adjustable expansion joint. Background Art

[0002] In the pipeline system, expansion joints are used to compensate for the expansion and contraction deformation of the pipeline. However, there are many problems with traditional expansion joints. In terms of adjustment function, traditional expansion joints cannot accurately adjust the sliding reserve of the limit pull rod, and it is difficult to adapt to the expansion and contraction compensation of the pipeline under different working conditions. In complex pipeline systems, the reserve on both sides of the ear block cannot be flexibly allocated, resulting in poor compensation effect and affecting the normal operation of the pipeline system. In terms of safety, traditional expansion joints are difficult to synchronize when adjusting the push rod reserve, and the reserve is often inconsistent, causing the expansion joint to be skewed during axial expansion and contraction, and the two sides of the bellows are unevenly stressed, which is prone to permanent deformation, reducing safety and increasing the risk of damage. In terms of service life, when steam is transported by traditional expansion joints, steam is easy to flow back into the bellows, and the accumulated water will corrode the bellows and shorten its service life. In addition, the change in the outlet diameter of the steam generator causes excessive pressure, which makes the two ends of the bellows unevenly pressurized. The welding part of the liner pipe is affected by turbulence and pressure difference, impacting the sealing of the connecting flange, affecting the sealing performance of the pipeline system. Therefore, we propose a synchronous adjustment expansion joint to solve the above-mentioned problems. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a synchronously adjustable expansion joint.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a synchronously adjustable expansion joint, including an expansion joint component, the expansion joint component including a bellows, both ends of the bellows are fixedly connected with connecting rings, the end of the connecting ring away from the bellows is respectively fixedly connected with a middle ring and an outlet end, an elastic tube membrane is arranged on the inner side of the bellows, both ends of the elastic tube membrane are respectively fixedly connected with the middle ring and the outlet end, an inner liner is arranged on the inner side of the elastic tube membrane, the end of the middle ring away from the connecting ring is fixedly connected with a connecting section, the end of the connecting section away from the middle ring is fixedly connected with an inlet end, one end of the inner liner is fixedly connected to the middle part of the inner side of the connecting section, the other end of the inner liner is slidably connected to the inner side of the outlet end, both sides of the middle part of the outer circumference of the connecting section are fixedly connected with limiting rings, and both sides of the middle part of the outer circumference of the connecting section are rotatably connected with a swivel second and a swivel first through limiting rings, the swivel second is close to the inlet end, the swivel first is close to the middle ring, and guide grooves are arranged on the inner sides of the swivel second and the swivel first.

[0005] Preferably, the outer periphery of swivel two and swivel one are fixedly connected with evenly distributed boosting rings, swivel two and swivel one are rotatably connected with limit rings through guide grooves, a threaded opening is provided on the side of swivel two away from swivel one, and a slip ring is provided on the side of swivel two away from swivel one.

[0006] Preferably, evenly distributed limiting grooves are provided on the inner side of the slip rings, guide bars are slidably connected to the inner sides of the limiting grooves, and the guide bars are fixedly connected to both sides of the outer periphery of the connecting section.

[0007] Preferably, a threaded section 1 is provided on one side of the outer circumference of the slip ring that is close to the other side, and the threaded section 1 is threadedly connected to the inner side of the threaded opening.

[0008] Preferably, the outer periphery of the slip ring on the inner side of the swivel is fixedly connected with evenly distributed vertical frames, the ends of the vertical frames away from the slip ring are fixedly connected with fixed blocks, the middle of the fixed blocks are installed with sleeves, one ends of the sleeves are slidably connected with telescopic rods, the ends of the telescopic rods away from the sleeves are fixedly connected with limiting blocks, the bottoms of the limiting blocks are slidably connected with limiting pull rods, and the fixed blocks and the limiting pull rods are slidably connected.

[0009] Preferably, the limiting pull rods are penetrated by ear block 1 and ear block 2, the ear block 1 is fixedly connected to the outer periphery of the middle ring, the ear block 2 is fixedly connected to the outer periphery of the outlet end, the outer periphery of one end of the limiting pull rod away from the limiting block is provided with threaded section 2, the limiting pull rods are threadedly connected to two fixing nuts through threaded section 2, and the fixing nuts are provided on both sides of ear block 2.

[0010] Preferably, a fixing ring is fixedly connected to the outer periphery of the slip ring inside the second rotating ring, a side of the fixing ring close to the inlet end is fixedly connected to evenly distributed push rods, and a storage ring is installed on the side of the inlet end close to the middle ring.

[0011] Preferably, one side of the middle ring away from the inlet end is fixedly connected to outer sheath 1, the inner side of a portion of the outer sheath 1 away from the middle ring is slidably connected to outer sheath 2, and one end of the outer sheath 2 away from outer sheath 1 is fixedly connected to the outlet end.

[0012] Preferably, the bottom of one end of the limiting pull rod is fixedly connected to a fixing rod, the end of the fixing rod away from the limiting pull rod is threadedly connected to a ferrule, and the end of the ferrule away from the fixing rod is threadedly connected to the inside of the stand.

[0013] Preferably, the push rod has one end away from the fixed ring fixedly connected to a push plate, the push plate is slidably connected to the inside of the storage ring, a plurality of water outlets are fixedly connected to the outer periphery of the storage ring, the water outlets are all equipped with through pipes, and the through pipe has one end away from the water outlet fixedly connected to a sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can drive the slip ring on one side by utilizing the threaded opening and the threaded section 1 by rotating the swivel 2. In this process, the slip ring can be limited by the guide bar and the limit groove, so that the slip ring can slide along the guide bar. When the slip ring on this side moves, the fixed ring installed on the outer periphery can drive the push rod to move, and the storage liquid inside the storage ring can be discharged through the push plate at the end of the push rod, and introduced into the sleeve through the through pipe. After the storage liquid enters the sleeve, it will drive the telescopic rod to move, and the limit block can be driven to move by the telescopic rod, so as to adjust the direct distance between the fixed block and the limit block, so as to adjust the sliding reserved amount of the limit pull rod at one end of the ear block, which is beneficial to the expansion and contraction compensation process of the bellows on the expansion joint in actual use.

[0015] 2. The present invention separates each ferrule from the fixed rod by rotating the ferrule and screws the ferrule into the interior of the stand. Then, people can rotate the swivel ring 1, which can drive the slip ring close to the middle ring to move. The slip ring can drive each stand to move. The stand can drive each fixed block and the limit block to move synchronously, thereby adjusting the positions of the fixed block and the limit block, thereby redistributing the reserved amount on both sides of the ear block 1, which is beneficial to cope with the actual expansion and contraction situation in the pipeline system.

[0016] 3. The present invention can achieve synchronous adjustment of the reserved amount on the push rod through the swivel one and the swivel two, so as to avoid the situation that the reserved amount is inconsistent after adjustment in one direction, resulting in the expansion joint being skewed to one side in axial extension and contraction during subsequent expansion, and to avoid permanent deformation due to uneven force on both sides of the bellows on the expansion joint, which greatly improves the safety of the expansion joint in actual use and reduces the possibility of damage to the expansion joint during use, which is beneficial to actual use.

[0017] 4. The present invention adds an elastic tube membrane inside the expansion joint, which can effectively prevent the internal steam at the outlet end from flowing back into the bellows through the gap at the active part of the inner liner tube and then depositing at the bottom of the bellows during use, thereby effectively preventing the chemical corrosion caused by the subsequent long-term deposition of water from damaging the bellows, effectively avoiding internal damage to the bellows, and thus greatly extending the actual service life of the expansion joint. At the same time, a connecting section is added to one side of the bellows, which is connected to the outlet of the steam generator through the connecting section to prevent excessive pressure at the outlet of the steam generator due to changes in the pipe diameter, resulting in inconsistent pressure at both ends of the bellows. At the same time, the inner liner tube is extended so that the inner liner tube welding part is in the middle of the connecting section to prevent the turbulence and pressure difference at this place from causing additional impact on the sealing of the connecting flange, affecting the sealing of the pipeline system, and greatly improving the safety of the equipment when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of a synchronously adjustable expansion joint of the present invention; Figure 2 It is a partial structural schematic diagram of a push rod and a storage ring of a synchronously adjustable expansion joint of the present invention; Figure 3 It is a partial structural schematic diagram of a limiting ring and a threaded section of a synchronously adjustable expansion joint of the present invention; Figure 4 It is a partial structural schematic diagram of the threaded opening and guide groove of a synchronously adjustable expansion joint of the present invention; Figure 5 It is a schematic diagram of the local structure of the bellows of a synchronously adjustable expansion joint of the present invention; Figure 6 The present invention is a schematic diagram of the local structure of the elastic tube membrane of a synchronously adjustable expansion joint.

[0019] 1. Expansion joint; 101. Inlet end; 102. Middle ring; 103. Liner pipe; 104. Outer sheath 1; 105. Outer sheath 2; 106. Outlet end; 107. Fixing nut; 108. Limiting rod; 109. Fixing ring; 110. Through pipe; 111. Sleeve; 112. Fixing block; 113. Limiting block; 114. Guide bar; 115. Slip ring; 116. Swivel 1; 117. Swivel 2; 118 , push rod; 119, storage ring; 120, fixed rod; 121, ferrule; 122, telescopic rod; 123, stand; 124, threaded section one; 125, limit ring; 126, power ring; 127, limit groove; 128, threaded mouth; 129, guide groove; 130, ear block one; 131, threaded section two; 132, ear block two; 133, elastic tube membrane; 134, bellows; 135, connecting ring; 136, connecting section. DETAILED DESCRIPTION

[0020] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] like Figure 1-Figure 6A synchronously adjustable expansion joint is shown, comprising an expansion joint component 1, the expansion joint component 1 comprising a bellows 134, both ends of the bellows 134 are fixedly connected with a connecting ring 135, one end of the connecting ring 135 away from the bellows 134 is respectively fixedly connected with a middle ring 102 and an outlet end 106, an elastic tube membrane 133 is arranged inside the bellows 134, the middle part of the elastic tube membrane 133 is arranged to be thickened, and both ends of the elastic tube membrane 133 are respectively fixedly connected with the middle ring 102 and the outlet end 106, an inner liner 103 is arranged inside the elastic tube membrane 133, one end of the middle ring 102 away from the connecting ring 135 is fixedly connected with a connecting section 136, one end of the connecting section 136 away from the middle ring 102 is fixedly connected with the inlet end 101, and one end of the inner liner 103 is fixedly connected to the connecting ring 135. In the middle of the inner side of the connecting section 136, the other end of the inner liner pipe 103 is slidably connected to the inner side of the outlet end 106, and both sides of the middle part of the outer circumference of the connecting section 136 are fixedly connected to the limiting ring 125, and both sides of the middle part of the outer circumference of the connecting section 136 are rotatably connected to the swivel ring 117 and the swivel ring 116 through the limiting ring 125, respectively, the swivel ring 117 is close to the inlet end 101, and the swivel ring 116 is close to the middle ring 102, and the inner sides of the swivel ring 117 and the swivel ring 116 are provided with guide grooves 129, and the side of the middle ring 102 away from the inlet end 101 is fixedly connected to the outer sheath 104, and the inner side of a part of the outer sheath 104 away from the middle ring 102 is slidably connected to the outer sheath 2 105, and the end of the outer sheath 2 105 away from the outer sheath 104 is fixedly connected to the outlet end 106; Furthermore, in a specific implementation, people can use the expansion joint 1 to connect the steam generator and the steam pipe. When transporting high-temperature steam or hot water, the pipe will stretch due to the heat. The bellows 134 on the expansion joint 1 can absorb this axial displacement through axial stretching or compression to perform compensation work, which is beneficial to practical use. An elastic tube membrane 133 is added inside the expansion joint 1, so as to effectively prevent the internal steam at the outlet end 106 from flowing back through the gap at the active part of the liner pipe 103 to the inside of the bellows 134 and then depositing at the bottom of the bellows 134 during use, thereby effectively avoiding chemical corrosion caused by subsequent long-term deposition of accumulated water. The bellows 134 is protected from damage, which effectively avoids internal damage to the bellows 134, thereby significantly extending the actual service life of the expansion joint 1. At the same time, a connecting section 136 is installed on one side of the bellows 134, which is connected to the outlet of the steam generator via the connecting section 136, to avoid excessive pressure at the outlet of the steam generator due to changes in the pipe diameter, which causes inconsistent pressure at both ends of the bellows 134. At the same time, the liner pipe 103 is extended so that the welding part of the liner pipe 103 is in the middle of the connecting section 136, to avoid additional impact on the sealing of the connecting flange caused by turbulence and pressure difference there, which affects the sealing of the pipeline system and is beneficial to actual use.

[0022] Among them, the outer peripheries of the swivel ring 117 and the swivel ring 116 are fixedly connected with evenly distributed assisting rings 126, and the swivel ring 117 and the swivel ring 116 are rotatably connected with the limiting ring 125 through the guide groove 129. The side of the swivel ring 117 away from the swivel ring 116 is provided with a threaded opening 128, and the side of the swivel ring 117 away from the swivel ring 116 is provided with a slip ring 115, and the inner side of the slip ring 115 is provided with evenly distributed limiting grooves 127, and the inner side of the limiting groove 127 is slidably connected with a guide bar 114, and the guide bar 114 is fixedly connected to both sides of the outer periphery of the connecting section 136, and the side of the outer periphery of the slip ring 115 is close to the threaded section 124, and the threaded section 124 is threadedly connected to the inner side of the threaded opening 128; Furthermore, in specific implementation, in actual steam transportation, the reserved amount on the push rod 118 can be synchronously adjusted through the swivel 116 and the swivel 2 117, so as to avoid inconsistency in the reserved amount after adjustment in one direction, resulting in the expansion joint 1 tilting to one side in axial extension and contraction during subsequent expansion, and to avoid permanent deformation due to uneven force on both sides of the bellows 134 on the expansion joint 1, which greatly improves the safety of the expansion joint 1 in actual use and reduces the possibility of damage to the expansion joint 1 during use, which is beneficial to actual use.

[0023] Among them, the outer periphery of the slip ring 115 inside the swivel 116 is fixedly connected with a uniformly distributed stand 123, and the end of the stand 123 away from the slip ring 115 is fixedly connected with a fixed block 112, and a sleeve 111 is installed in the middle of the fixed block 112. One end of the sleeve 111 is slidably connected with a telescopic rod 122, and the end of the telescopic rod 122 away from the sleeve 111 is fixedly connected to the limited block 113, and the bottom of the limited block 113 is slidably connected to the limited pull rod 108, and the fixed block 112 is slidably connected to the limited pull rod 108, and the bottom of one end of the limited pull rod 108 is fixedly connected with a fixed rod 120, and the fixed rod 120 is far away from the fixed rod One end of the limiting pull rod 108 is threadedly connected with a ferrule 121, and one end of the ferrule 121 away from the fixed rod 120 is threadedly connected to the inside of the stand 123. The limiting pull rod 108 is penetrated by an ear block 130 and an ear block 2 132. The ear block 130 is fixedly connected to the outer periphery of the middle ring 102, and the ear block 2 132 is fixedly connected to the outer periphery of the outlet end 106. The outer periphery of one end of the limiting pull rod 108 away from the limiting block 113 is provided with a threaded section 2 131. The limiting pull rod 108 is threadedly connected to two fixing nuts 107 through the threaded section 2 131, and the fixing nuts 107 are arranged on both sides of the ear block 2 132. Furthermore, in the specific implementation, after the reserved amount on the limit pull rod 108 is adjusted, people first rotate the sleeve 121 to separate each sleeve 121 from the fixed rod 120 and screw the sleeve 121 into the inside of the stand 123. Then people can rotate the swivel ring 116, and the swivel ring 116 can drive the slip ring 115 close to the side of the middle ring 102 to move, and the slip ring 115 can drive each stand 123 to move, and the stand 123 can drive each fixed block 112 and the limit block 113 to move synchronously, so as to adjust the position of the fixed block 112 and the limit block 113, so that the reserved amount on both sides of the ear block 130 can be redistributed, which is beneficial to cope with the actual expansion and contraction situation in the pipeline system.

[0024] Among them, the outer periphery of the slip ring 115 inside the second rotating ring 117 is fixedly connected with a fixed ring 109, and the side of the fixed ring 109 close to the inlet end 101 is fixedly connected with evenly distributed push rods 118, and the side of the inlet end 101 close to the middle ring 102 is installed with a storage ring 119, and the push rods 118 are fixedly connected with a push plate at one end away from the fixed ring 109, and the push plate is slidably connected inside the storage ring 119, and the outer periphery of the storage ring 119 is fixedly connected with a plurality of water outlets, and the water outlets are all installed with through pipes 110, and the through pipes 110 are fixedly connected with a sleeve 111 at one end away from the water outlet; Furthermore, in a specific implementation, the inlet end 101 is connected to the outlet of the steam generator, and the outlet end 106 is installed with the inlet of the steam pipe. After the installation is completed, people can rotate the second swivel 117 according to actual needs to adjust the sliding reserve of the limit pull rod 108. By rotating the second swivel 117, the threaded opening 128 and the threaded section 124 can be used to drive the slip ring 115 on one side. In this process, the slip ring 115 can be limited by the guide bar 114 and the limit groove 127, so that the slip ring 115 can slide along the guide bar 114. When the slip ring 115 on this side moves, The fixed ring 109 installed on the periphery can drive the push rod 118 to move, and the push plate at the end of the push rod 118 can discharge the stored liquid inside the storage ring 119 and introduce it into the sleeve 111 through the through pipe 110. After the stored liquid enters the sleeve 111, it will drive the telescopic rod 122 to move, and the telescopic rod 122 can drive the limit block 113 to move, so as to adjust the direct distance between the fixed block 112 and the limit block 113, so as to adjust the sliding reserve amount of the limit rod 108 at the ear block 130, which is beneficial to the expansion and contraction compensation process of the bellows 134 on the expansion joint 1 in actual use.

[0025] Working principle: In actual use, people can use the expansion joint 1 to connect the steam generator and the steam pipe. When transporting high-temperature steam or hot water, the pipe will stretch due to the heat. The bellows 134 on the expansion joint 1 can absorb this axial displacement through axial stretching or compression to perform compensation work, which is beneficial to actual use. During installation, the inlet end 101 is connected to the outlet of the steam generator, and the outlet end 106 is installed with the inlet of the steam pipe. After the installation is completed, people can rotate the swivel 117 according to actual needs to adjust the sliding reserve of the limit pull rod 108. By rotating the swivel 117, the threaded opening 128 and the threaded section 1 124 can be used to drive the slip ring 115 on one side. In this process, the guide bar 11 4 and the limiting groove 127 can limit the slip ring 115, so that the slip ring 115 can slide along the guide bar 114. When the slip ring 115 on this side moves, the fixed ring 109 installed on the periphery can drive the push rod 118 to move, and the storage liquid inside the storage ring 119 can be discharged through the push plate at the end of the push rod 118, and introduced into the sleeve 111 through the through pipe 110. After the storage liquid enters the sleeve 111, it will drive the telescopic rod 122 to move, and the limiting block 113 can be driven to move through the telescopic rod 122, so as to adjust the direct distance between the fixed block 112 and the limiting block 113, thereby adjusting the sliding reserved amount of the limiting pull rod 108 at the ear block 130, which is beneficial to the wave on the expansion joint 1 in actual use. During the expansion and contraction compensation process of the corrugated tube 134, when the reserved amount on the limit pull rod 108 is adjusted, people first rotate the ferrule 121 to separate each ferrule 121 from the fixed rod 120 and screw the ferrule 121 into the inside of the stand 123, and then people can rotate the swivel 116, and the swivel 116 can drive the slip ring 115 close to the side of the middle ring 102 to move, and the slip ring 115 can drive each stand 123 to move, and the stand 123 can drive each fixed block 112 and the limit block 113 to move synchronously, so as to adjust the position of the fixed block 112 and the limit block 113, so as to redistribute the reserved amount on both sides of the ear block 130, which is beneficial to cope with the actual expansion and contraction situation in the pipeline system. During steam transportation, the reserved amount on the push rod 118 can be synchronously adjusted through the swivel 116 and the swivel 2 117, so as to avoid the inconsistency of the reserved amount after one direction adjustment, resulting in the expansion joint 1 being skewed to one side in the axial expansion and contraction during subsequent expansion, and to avoid the uneven force on both sides of the bellows 134 on the expansion joint 1 and permanent deformation, which greatly improves the safety of the expansion joint 1 in actual use and reduces the possibility of damage to the expansion joint 1 during use, which is beneficial to actual use. At the same time, an elastic tube membrane 133 is added inside the expansion joint 1, so as to effectively avoid the internal steam at the outlet end 106 from flowing back into the bellows 134 through the gap at the active part of the inner liner pipe 103 during use and then depositing at the bottom of the bellows 134.This can effectively prevent the subsequent chemical corrosion caused by long-term accumulation of water from damaging the bellows 134, effectively avoid internal damage to the bellows 134, and thus greatly extend the actual service life of the expansion joint 1. At the same time, a connecting section 136 is installed on one side of the bellows 134, and connected to the outlet of the steam generator through the connecting section 136, so as to avoid excessive pressure at the outlet of the steam generator due to changes in the pipe diameter, resulting in inconsistent pressure at both ends of the bellows 134. At the same time, the inner liner 103 is extended so that the welding part of the inner liner 103 is located in the middle of the connecting section 136, so as to avoid the turbulence and pressure difference at this place causing additional impact on the sealing of the connecting flange, affecting the sealing of the pipeline system, which is beneficial to actual use.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A synchronously adjustable expansion joint, comprising an expansion joint component (1), characterized in that: The expansion joint (1) comprises a bellows (134), both ends of the bellows (134) are fixedly connected to connecting rings (135), one end of the connecting ring (135) away from the bellows (134) is fixedly connected to a middle ring (102) and an outlet end (106), an elastic tube membrane (133) is arranged inside the bellows (134), both ends of the elastic tube membrane (133) are fixedly connected to the middle ring (102) and the outlet end (106), an inner lining tube (103) is arranged inside the elastic tube membrane (133), one end of the middle ring (102) away from the connecting ring (135) is fixedly connected to a connecting section (136), and the connecting section (136) is away from the middle ring ( One end of the connecting section (102) is fixedly connected to the inlet end (101), one end of the inner liner tube (103) is fixedly connected to the middle part of the inner side of the connecting section (136), and the other end of the inner liner tube (103) is slidably connected to the inner side of the outlet end (106). Both sides of the middle part of the outer circumference of the connecting section (136) are fixedly connected to limit rings (125). Both sides of the middle part of the outer circumference of the connecting section (136) are rotatably connected to a swivel second (117) and a swivel first (116) through limit rings (125). The swivel second (117) is close to the inlet end (101), and the swivel first (116) is close to the middle ring (102). Guide grooves (129) are provided on the inner sides of the swivel second (117) and the swivel first (116).

2. A synchronously adjustable expansion joint according to claim 1, characterized in that: The outer peripheries of the second swivel (117) and the first swivel (116) are fixedly connected with evenly distributed assisting rings (126); the second swivel (117) and the first swivel (116) are rotatably connected to the limit ring (125) via a guide groove (129); a threaded opening (128) is provided on the side of the second swivel (117) away from the first swivel (116); and a slip ring (115) is provided on the side of the second swivel (117) away from the first swivel (116).

3. A synchronously adjustable expansion joint according to claim 2, characterized in that: The inner sides of the slip rings (115) are provided with evenly distributed limiting grooves (127), the inner sides of the limiting grooves (127) are slidably connected with guide bars (114), and the guide bars (114) are fixedly connected to both sides of the outer periphery of the connecting section (136).

4. A synchronously adjustable expansion joint according to claim 3, characterized in that: A threaded section 1 (124) is provided on one side of the outer circumference of the slip ring (115) that is close to the other side, and the threaded section 1 (124) is threadedly connected to the inner side of the threaded opening (128).

5. A synchronously adjustable expansion joint according to claim 4, characterized in that: The outer periphery of the slip ring (115) inside the rotating ring (116) is fixedly connected with evenly distributed vertical frames (123); one end of the vertical frames (123) away from the slip ring (115) is fixedly connected with a fixed block (112); a sleeve (111) is installed in the middle of the fixed block (112); one end of the sleeve (111) is slidably connected with a telescopic rod (122); one end of the telescopic rod (122) away from the sleeve (111) is fixedly connected with a limit block (113); the bottom of the limit block (113) is slidably connected with a limit pull rod (108); and the fixed block (112) and the limit pull rod (108) are slidably connected.

6. A synchronously adjustable expansion joint according to claim 5, characterized in that: The limiting pull rod (108) is penetrated by ear block one (130) and ear block two (132); the ear block one (130) is fixedly connected to the periphery of the middle ring (102); the ear block two (132) is fixedly connected to the periphery of the outlet end (106); the periphery of one end of the limiting pull rod (108) away from the limiting block (113) is provided with a threaded section two (131); the limiting pull rod (108) is threadedly connected to two fixing nuts (107) through the threaded section two (131); the fixing nuts (107) are provided on both sides of the ear block two (132).

7. A synchronously adjustable expansion joint according to claim 6, characterized in that: A fixed ring (109) is fixedly connected to the outer periphery of the slip ring (115) inside the second rotating ring (117), and evenly distributed push rods (118) are fixedly connected to the side of the fixed ring (109) close to the inlet end (101), and a storage ring (119) is installed on the side of the inlet end (101) close to the middle ring (102).

8. The synchronously adjustable expansion joint according to claim 1, characterized in that: The side of the middle ring (102) away from the inlet end (101) is fixedly connected to the outer sheath 1 (104), the inner side of a part of the outer sheath 1 (104) away from the middle ring (102) is slidably connected to the outer sheath 2 (105), and the end of the outer sheath 2 (105) away from the outer sheath 1 (104) is fixedly connected to the outlet end (106).

9. A synchronously adjustable expansion joint according to claim 5, characterized in that: The bottom of one end of the limiting pull rod (108) is fixedly connected to a fixing rod (120), one end of the fixing rod (120) away from the limiting pull rod (108) is threadedly connected to a clamping sleeve (121), and one end of the clamping sleeve (121) away from the fixing rod (120) is threadedly connected to the inside of the stand (123).

10. The synchronously adjustable expansion joint according to claim 7, characterized in that: One end of the push rod (118) away from the fixed ring (109) is fixedly connected to a push plate, and the push plate is slidably connected to the inside of the storage ring (119). The outer periphery of the storage ring (119) is fixedly connected to a plurality of water outlets, and the water outlets are all installed with a through pipe (110). One end of the through pipe (110) away from the water outlet is fixedly connected to a sleeve (111).

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