A synchronous adjustment type expansion joint

Abstract

The present invention relates to the field of expansion joints, and particularly to a synchronously adjustable expansion joint, which includes an expansion joint member. The expansion joint member includes a bellows. Both ends of the bellows are fixedly connected with connecting rings. The ends of the connecting rings away from the bellows are respectively fixedly connected with a middle ring and an outlet end. A resilient tube film is arranged inside the bellows. Both ends of the resilient tube film are fixedly connected with the middle ring and the outlet end respectively. A lining tube is arranged inside the resilient tube film. One end of the middle ring away from the connecting ring is fixedly connected with a connecting section. One end of the connecting section away from the middle ring is fixedly connected with an inlet end. In the present invention, a connecting section is added on one side of the bellows and is connected to the outlet part of the steam generating kettle through the connecting section, so as to avoid excessive pressure caused by the change of pipe diameter at the outlet of the steam generating kettle. At the same time, the lining tube is extended, so that the welding part of the lining tube is located in the middle of the connecting section, avoiding additional impact on the sealing part of the connecting flange caused by the flow disturbance and pressure difference at this place.

Description

Technical Field

[0001] The present invention relates to the field of expansion joints, and particularly to a synchronous adjustment type expansion joint. Background Art

[0002] In a pipeline system, expansion joints are used to compensate for pipeline expansion and contraction deformation. However, traditional expansion joints have many problems. In terms of the adjustment function, traditional expansion joints cannot accurately adjust the sliding reserve of the limit tie rods, and it is difficult to adapt to the expansion and contraction compensation of pipelines under different working conditions. In a complex pipeline system, it is also impossible to flexibly allocate the reserves on both sides of the ear blocks, resulting in poor compensation effects and affecting the normal operation of the pipeline system. In terms of safety, it is difficult for traditional expansion joints to be synchronized when adjusting the reserve of the push rod, and the reserves are often inconsistent, resulting in skewing when the expansion joint axially expands and contracts, uneven forces on both sides of the bellows, and easy occurrence of permanent deformation, reducing safety and increasing the risk of damage. In terms of service life, when traditional expansion joints are used for steam transmission, steam is likely to flow back into the bellows, and the accumulated water will corrode the bellows, shortening the service life. In addition, the change in the outlet pipe diameter of the steam generating kettle causes excessive pressure, resulting in uneven pressure on both ends of the bellows. The welded part of the inner lining pipe is affected by turbulent flow and pressure difference, impacting the sealing part of the connecting flange and affecting the sealing performance of the pipeline system. Therefore, we propose a synchronous adjustment type expansion joint to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the background art and propose a synchronous adjustment type expansion joint.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A synchronous adjustment type expansion joint includes an expansion joint member. The expansion joint member includes a bellows. Both ends of the bellows are fixedly connected with connection rings. One end of each connection ring away from the bellows is respectively fixedly connected with a middle ring and an outlet end. A resilient tube film is arranged inside the bellows. Both ends of the resilient tube film are respectively fixedly connected with the middle ring and the outlet end. An inner lining tube is arranged inside the resilient tube film. One end of the inner lining tube is fixedly connected to the middle of the inner side of the connection section. The other end of the inner lining tube is slidably connected to the inner side of the outlet end. Both sides of the middle of the outer periphery of the connection section are fixedly connected with limit rings. A second rotating ring and a first rotating ring are respectively rotatably connected to both sides of the middle of the outer periphery of the connection section through the limit rings. The second rotating ring is close to the inlet end, and the first rotating ring is close to the middle ring. Guide grooves are arranged inside both the second rotating ring and the first rotating ring.

[0005] Preferably, the outer circumferences of the second swivel ring and the first swivel ring are both fixedly connected with uniformly distributed boosting rings. The second swivel ring and the first swivel ring are both rotationally connected to the limiting ring through guide grooves. Threaded ports are provided on the sides of the second swivel ring and the first swivel ring away from each other, and slip rings are provided on the sides of the second swivel ring and the first swivel ring away from each other.

[0006] Preferably, uniformly distributed limiting grooves are formed inside the slip rings. Guide bars are slidably connected inside the limiting grooves, and the guide bars are fixedly connected to both sides of the outer circumference of the connecting section.

[0007] Preferably, threaded sections one are provided on the sides of the slip rings close to each other, and the threaded sections one are threadedly connected inside the threaded ports.

[0008] Preferably, uniformly distributed upright frames are fixedly connected to the outer circumference of the slip ring inside the first swivel ring. Fixed blocks are fixedly connected to the ends of the upright frames away from the slip ring. Sleeves are installed in the middle of the fixed blocks. One ends of the sleeves are slidably connected with telescopic rods. Limiting blocks are fixedly connected to the ends of the telescopic rods away from the sleeves. Limiting pull rods are slidably connected to the bottoms of the limiting blocks, and the fixed blocks and the limiting pull rods are slidably connected.

[0009] Preferably, the limiting pull rods all penetrate through ear blocks one and ear blocks two. The ear blocks one are fixedly connected to the outer circumference of the middle ring, and the ear blocks two are fixedly connected to the outer circumference of the outlet end. Threaded sections two are provided on the outer circumferences of the ends of the limiting pull rods away from the limiting blocks. Two fixing nuts are threadedly connected to the limiting pull rods through the threaded sections two, and the fixing nuts are arranged on both sides of the ear blocks two.

[0010] Preferably, a fixed ring is fixedly connected to the outer circumference of the slip ring inside the second swivel ring. Uniformly distributed push rods are fixedly connected to the side of the fixed ring close to the inlet end. A storage ring is installed on the side of the inlet end close to the middle ring.

[0011] Preferably, outer sheaths one are fixedly connected to the sides of the middle ring away from the inlet end. Outer sheaths two are slidably connected inside the parts of the outer sheaths one away from the middle ring. Outlet ends are fixedly connected to the ends of the outer sheaths two away from the outer sheaths one.

[0012] Preferably, fixed rods are fixedly connected to the bottoms of one ends of the limiting pull rods. Bushings are threadedly connected to the ends of the fixed rods away from the limiting pull rods. The bushings are threadedly connected inside the upright frames away from the fixed rods.

[0013] Preferably, push plates are fixedly connected to the ends of the push rods away from the fixed ring. The push plates are slidably connected inside the storage ring. A plurality of water outlets are fixedly connected to the outer circumference of the storage ring. Through pipes are installed at the water outlets. Sleeves are fixedly connected to the ends of the through pipes away from the water outlets.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By rotating the second rotating ring, the present invention can drive the sliding ring on one side through the threaded port and the first threaded section. During this process, the sliding ring can be limited by the guide bar and the limiting groove, so that the sliding ring can slide along the guide bar. When the sliding ring on this side moves, the fixed ring installed on the outer periphery can drive the push rod to move. The liquid storage in the liquid 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 liquid storage enters the sleeve, it will drive the telescopic rod to move, and the telescopic rod can drive the limiting block to move, realizing the adjustment of the direct distance between the fixed block and the limiting block, so as to realize the adjustment of the sliding reserve amount of the limiting pull rod at the ear block 1, which is beneficial to the telescopic compensation process of the bellows on the expansion joint in actual use.

[0016] 2. By rotating the ferrule, separating each ferrule from the fixed rod and screwing the ferrule into the vertical frame, people can then rotate the first rotating ring. The first rotating ring can drive the sliding ring near the middle ring to move. Through this sliding ring, each vertical frame can be driven to move. Through the vertical frame, each fixed block and limiting block can be driven to move synchronously, realizing the adjustment of the positions of the fixed block and the limiting block, so as to redistribute the reserve amounts on both sides of the ear block 1, which is beneficial to coping with the actual telescopic situation in the pipeline system.

[0017] 3. The present invention can realize the synchronous adjustment of the reserve amount on the push rod through the first rotating ring and the second rotating ring, avoiding the situation that the reserve amounts are inconsistent after one azimuth is adjusted, resulting in the expansion joint tilting to one side during axial expansion, and avoiding the permanent deformation caused by uneven forces on both sides of the bellows on the expansion joint. This greatly improves the safety of the expansion joint in actual use, and at the same time reduces the possibility of damage to the expansion joint during use, which is beneficial to actual use.

[0018] 4. The present invention is provided with an elastic tube film 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 movable part of the inner liner tube and depositing at the bottom of the bellows during use. Thus, it can effectively avoid the chemical corrosion caused by the long-term deposition of subsequent accumulated water to damage the bellows, effectively avoiding internal damage to the bellows, and thus can greatly extend the actual service life of the expansion joint. At the same time, a connecting section is installed on one side of the bellows, which is connected to the outlet part of the steam generating kettle through the connecting section, avoiding the situation that the pressure is too high due to the change of pipe diameter at the outlet of the steam generating kettle, resulting in inconsistent pressures on both ends of the bellows. At the same time, the inner liner tube is extended, so that the welding part of the inner liner tube is in the middle of the connecting section, avoiding the additional impact of the flow disturbance and pressure difference at this place on the sealing part of the connecting flange, affecting the sealing of the pipeline system, and greatly improving the safety of the equipment during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the front three-dimensional structural schematic diagram of a synchronous adjustment type expansion joint of the present invention;

[0020] Figure 2 This is the partial structural schematic diagram of the push rod and the storage ring of a synchronous adjustment type expansion joint of the present invention;

[0021] Figure 3 This is the partial structural schematic diagram of the limit ring and the threaded section 1 of a synchronous adjustment type expansion joint of the present invention;

[0022] Figure 4 This is the partial structural schematic diagram of the threaded port and the guide groove of a synchronous adjustment type expansion joint of the present invention;

[0023] Figure 5 This is the partial structural schematic diagram of the bellows of a synchronous adjustment type expansion joint of the present invention;

[0024] Figure 6 This is the partial structural schematic diagram of the elastic tube film of a synchronous adjustment type expansion joint of the present invention.

[0025] 1. Expansion joint member; 101. Inlet end; 102. Middle ring; 103. Inner liner tube; 104. Outer sheath 1; 105. Outer sheath 2; 106. Outlet end; 107. Fixed nut; 108. Limit pull rod; 109. Fixed ring; 110. Through pipe; 111. Sleeve; 112. Fixed block; 113. Limit block; 114. Guide bar; 115. Slip ring; 116. Rotating ring 1; 117. Rotating ring 2; 118. Push rod; 119. Storage ring; 120. Fixed rod; 121. Ferrule; 122. Telescopic rod; 123. Vertical frame; 124. Threaded section 1; 125. Limit ring; 126. Boosting ring; 127. Limit groove; 128. Threaded port; 129. Guide groove; 130. Ear block 1; 131. Threaded section 2; 132. Ear block 2; 133. Elastic tube film; 134. Bellows; 135. Connecting ring; 136. Connecting section. Detailed implementation manners

[0026] 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 in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0027] Such as Figures 1-6A synchronous adjustment type expansion joint shown in the figure includes an expansion joint member 1. The expansion joint member 1 includes a corrugated pipe 134. Both ends of the corrugated pipe 134 are fixedly connected with connection rings 135. One end of the connection ring 135 away from the corrugated pipe 134 is respectively fixedly connected with a middle ring 102 and an outlet end 106. A elastic tube film 133 is arranged inside the corrugated pipe 134. The middle part of the elastic tube film 133 is thickened. Both ends of the elastic tube film 133 are respectively fixedly connected with the middle ring 102 and the outlet end 106. A lining tube 103 is arranged inside the elastic tube film 133. One end of the lining tube 103 is fixedly connected to the middle part inside the connection section 136. The other end of the lining tube 103 is slidably connected with the inside of the outlet end 106. On both sides of the middle part of the outer periphery of the connection section 136, limit rings 125 are respectively fixedly connected. A second rotating ring 117 and a first rotating ring 116 are respectively rotatably connected to the outer periphery of the middle part of the connection section 136 through the limit rings 125. The second rotating ring 117 is close to the inlet end 101, and the first rotating ring 116 is close to the middle ring 102. Guide grooves 129 are arranged inside both the second rotating ring 117 and the first rotating ring 116. On one side of the middle ring 102 away from the inlet end 101, a first outer sheath 104 is fixedly connected. A second outer sheath 105 is slidably connected inside a part of the first outer sheath 104 away from the middle ring 102. One end of the second outer sheath 105 away from the first outer sheath 104 is respectively fixedly connected with the outlet end 106;

[0028] Furthermore, in specific implementation, people can use the expansion joint member 1 to connect the steam generating kettle and the steam pipeline. When transporting high-temperature steam or hot water, the pipeline will expand due to heat. The corrugated pipe 134 part on the expansion joint member 1 can absorb this axial displacement through axial stretching or compression to carry out compensation work, which is beneficial to actual use. An elastic tube film 133 is added inside the expansion joint member 1, so as to effectively avoid the internal steam at the outlet end 106 flowing back into the inside of the corrugated pipe 134 through the gap at the movable part of the lining tube 103 and depositing at the bottom of the corrugated pipe 134 during use. Thus, it can effectively avoid the chemical corrosion caused by the long-term deposition of subsequent accumulated water to damage the corrugated pipe 134, effectively avoiding the internal damage of the corrugated pipe 134, and thus can greatly extend the actual service life of the expansion joint member 1. At the same time, a connection section 136 is installed on one side of the corrugated pipe 134 and connected to the outlet part of the steam generating kettle through the connection section 136 to avoid the situation that the pressure is too high due to the change of pipe diameter at the outlet of the steam generating kettle, resulting in inconsistent pressure on both ends of the corrugated pipe 134. At the same time, the lining tube 103 is extended so that the welding part of the lining tube 103 is in the middle part inside the connection section 136, avoiding the additional impact of the turbulent flow and pressure difference at this place on the sealing of the connection flange and affecting the sealing of the pipeline system, which is beneficial to actual use.

[0029] Among them, evenly distributed boosting rings 126 are fixedly connected to the outer peripheries of both the second swivel ring 117 and the first swivel ring 116. Both the second swivel ring 117 and the first swivel ring 116 are rotatably connected to the limit ring 125 through guide grooves 129. Threaded ports 128 are provided on the sides of the second swivel ring 117 and the first swivel ring 116 that are away from each other. Slip rings 115 are provided on the sides of the second swivel ring 117 and the first swivel ring 116 that are away from each other. Evenly distributed limit grooves 127 are formed on the inner sides of the slip rings 115. Guide bars 114 are slidably connected to the inner sides of the limit grooves 127. The guide bars 114 are fixedly connected to both sides of the outer periphery of the connecting section 136. Threaded sections one 124 are provided on the sides of the outer peripheries of the slip rings 115 that are close to each other. The threaded sections one 124 are all threadedly connected to the inner sides of the threaded ports 128;

[0030] Furthermore, in specific implementation, during actual steam transportation, the first swivel ring 116 and the second swivel ring 117 can be used to synchronously adjust the reserved amount on the push rod 118, avoiding the situation that the reserved amount is inconsistent after one azimuth is adjusted, resulting in the axial expansion of the expansion joint member 1 being skewed to one side during subsequent expansion, and avoiding uneven stress on both sides of the bellows 134 of the expansion joint member 1, which may cause permanent deformation. This greatly improves the safety of the expansion joint member 1 during actual use, and at the same time reduces the possibility of damage to the expansion joint member 1 during use, which is beneficial for actual use.

[0031] Among them, evenly distributed vertical frames 123 are fixedly connected to the outer peripheries of the slip rings 115 inside the first swivel ring 116. Fixed blocks 112 are fixedly connected to the ends of the vertical frames 123 away from the slip rings 115. Sleeve barrels 111 are installed in the middles of the fixed blocks 112. One ends of the telescopic rods 122 are slidably connected to the sleeve barrels 111. Limit blocks 113 are fixedly connected to the ends of the telescopic rods 122 away from the sleeve barrels 111. The bottom ends of the limit blocks 113 are slidably connected to the limit pull rods 108. The fixed blocks 112 and the limit pull rods 108 are slidably connected. Fixed rods 120 are fixedly connected to the bottom ends of one ends of the limit pull rods 108. The ends of the fixed rods 120 away from the limit pull rods 108 are threadedly connected to the ferrule sleeves 121. The ends of the ferrule sleeves 121 away from the fixed rods 120 are threadedly connected to the inside of the vertical frames 123. The limit pull rods 108 all penetrate through the first ear blocks 130 and the second ear blocks 132. The first ear blocks 130 are fixedly connected to the outer peripheries of the middle rings 102. The second ear blocks 132 are fixedly connected to the outer peripheries of the outlet ends 106. Threaded sections two 131 are provided on the outer peripheries of the ends of the limit pull rods 108 away from the limit blocks 113. Two fixing nuts 107 are threadedly connected to the limit pull rods 108 through the threaded sections two 131. The fixing nuts 107 are all arranged on both sides of the second ear blocks 132;

[0032] Further, in specific implementation, after the adjustment of the reserved amount on the limit pull rod 108 is completed, 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 vertical frame 123. Then, people can rotate the first rotating ring 116, and through the first rotating ring 116, the sliding ring 115 on the side close to the middle ring 102 can be driven to move. Through this sliding ring 115, each vertical frame 123 can be driven to move. Through the vertical frame 123, each fixed block 112 and the limit block 113 can be driven to move synchronously, realizing the adjustment of the positions of the fixed block 112 and the limit block 113, so as to redistribute the reserved amount on both sides of the first ear block 130, which is beneficial to coping with the actual expansion and contraction situation in the pipeline system.

[0033] Among them, a fixed ring 109 is fixedly connected to the outer periphery of the sliding ring 115 inside the second rotating ring 117. A uniformly distributed push rod 118 is fixedly connected to one side of the fixed ring 109 close to the inlet end 101. A storage ring 119 is installed on one side of the inlet end 101 close to the middle ring 102. The ends of the push rods 118 far from the fixed ring 109 are all fixedly connected with push plates, and the push plates are slidably connected inside the storage ring 119. A plurality of water outlets are fixedly connected to the outer periphery of the storage ring 119, and through pipes 110 are installed at the water outlets. The ends of the through pipes 110 far from the water outlets are all fixedly connected with sleeves 111;

[0034] Further, in specific implementation, the inlet end 101 is connected to the outlet part of the steam generating kettle, and the outlet end 106 is installed to the inlet part of the steam pipeline. After the installation is completed, people can rotate the second rotating ring 117 according to actual needs to adjust the sliding reserved amount of the limit pull rod 108. By rotating the second rotating ring 117, one side of the sliding ring 115 can be driven by the threaded port 128 and the first threaded section 124. During this process, the sliding ring 115 can be limited by the guide bar 114 and the limit groove 127, so that the sliding ring 115 can slide along the guide bar 114. When the sliding ring 115 on this side moves, the push rod 118 can be driven by the fixed ring 109 installed on the outer periphery. The liquid stored inside the storage ring 119 can be discharged by the push plate at the end of the push rod 118 and introduced into the sleeve 111 through the through pipe 110. After the stored liquid enters the sleeve 111, the telescopic rod 122 can be driven to move, and through the telescopic rod 122, the limit block 113 can be driven to move, realizing the adjustment of the direct distance between the fixed block 112 and the limit block 113, so as to realize the adjustment of the sliding reserved amount of the limit pull rod 108 at the first ear block 130, which is beneficial to the expansion and contraction compensation process of the corrugated pipe 134 on the expansion joint member 1 during actual use.

[0035] Working principle:

[0036] In actual use, people can use the expansion joint member 1 to connect the steam generating kettle and the steam pipeline. When transporting high-temperature steam or hot water, the pipeline will expand due to heat. The bellows 134 part on the expansion joint member 1 can absorb this axial displacement through axial stretching or compression to perform compensation work, which is beneficial for actual use. During installation, the inlet end 101 is connected to the outlet part of the steam generating kettle, and the outlet end 106 is installed to the inlet part of the steam pipeline. After installation, people can rotate the second rotating ring 117 according to actual needs to adjust the sliding allowance of the limit pull rod 108. By rotating the second rotating ring 117, the threaded port 128 and the first threaded section 124 can drive the sliding ring 115 on one side. During this process, the sliding ring 115 can be limited by the guide bar 114 and the limit groove 127, so that the sliding ring 115 can slide along the guide bar 114. When the sliding ring 115 on this side moves, the fixed ring 109 installed on the outer periphery can drive the push rod 118 to move. The push plate at the end of the push rod 118 can discharge the liquid stored in the storage ring 119 and introduce it into the sleeve 111 through the through pipe 110. After the liquid enters the sleeve 111, it will drive the telescopic rod 122 to move. The telescopic rod 122 can drive the limit block 113 to move, realizing the adjustment of the direct distance between the fixed block 112 and the limit block 113, so as to realize the adjustment of the sliding allowance of the limit pull rod 108 at the first ear block 130, which is beneficial for the telescopic compensation process of the bellows 134 on the expansion joint member 1 in actual use. When the allowance on the limit pull rod 108 is adjusted, people first rotate the ferrule 121, separate each ferrule 121 from the fixed rod 120 and screw the ferrule 121 into the vertical frame 123. Then people can rotate the first rotating ring 116. By rotating the first rotating ring 116, the sliding ring 115 close to the middle ring 102 can be driven to move. Through this sliding ring 115, each vertical frame 123 can be driven to move. Through the vertical frame 123, each fixed block 112 and the limit block 113 can be driven to move synchronously, realizing the adjustment of the positions of the fixed block 112 and the limit block 113, so as to redistribute the allowances on both sides of the first ear block 130, which is beneficial for dealing with the actual expansion and contraction situation in the pipeline system. In actual steam transportation, the first rotating ring 116 and the second rotating ring 117 can realize the synchronous adjustment of the allowance on the push rod 118, avoiding the situation that the allowance is inconsistent after one azimuth is adjusted, resulting in the expansion joint member 1 tilting to one side during axial expansion and contraction during subsequent expansion, and avoiding uneven stress on both sides of the bellows 134 on the expansion joint member 1 resulting in permanent deformation, greatly improving the safety of the expansion joint member 1 during actual use, and at the same time reducing the possibility of damage to the expansion joint member 1 during use, which is beneficial for actual use. At the same time, an elastic tube film 133 is added inside the expansion joint member 1, which can effectively prevent the internal steam at the outlet end 106 from flowing back into the bellows 134 through the gap at the movable part of the inner lining tube 103 and depositing at the bottom of the bellows 134 during use.Therefore, it can effectively avoid the damage to the corrugated pipe 134 caused by chemical corrosion due to the long-term deposition of subsequent accumulated water, effectively avoid the internal damage of the corrugated pipe 134, and thus can greatly extend the actual service life of the expansion joint member 1. At the same time, a connection section 136 is installed on one side of the corrugated pipe 134, and the connection section 136 is connected to the outlet part of the steam generator kettle to avoid the situation where the pressure is too high due to the change in pipe diameter at the outlet of the steam generator kettle, resulting in inconsistent pressure on both ends of the corrugated pipe 134. At the same time, the inner lining pipe 103 is extended, so that the welding part of the inner lining pipe 103 is located in the middle of the connection section 136, avoiding the additional impact of the flow disturbance and pressure difference at this place on the sealing of the connection flange, affecting the sealing of the pipeline system, which is beneficial to actual use.

[0037] 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 by the above embodiments, and the principles described in the above embodiments and the specification are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended 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 one end of the connecting section (136) away from the middle ring (102) is fixedly connected to The inlet end (101) is fixedly connected to the middle of the inner side of the connecting section (136) at one end of the inner liner tube (103), and the other end of the inner liner tube (103) is slidably connected to the inner side of the outlet end (106). The middle of the outer circumference of the connecting section (136) is fixedly connected to the limiting ring (125) on both sides. The middle of the outer circumference of the connecting section (136) is rotatably connected to the second swivel (117) and the first swivel (116) through the limiting ring (125). The second swivel (117) is close to the inlet end (101), and the first swivel (116) is close to the middle ring (102). The inner sides of the second swivel (117) and the first swivel (116) are both provided with guide grooves (129). The outer circumference of the sliding ring (115) on the inner side of the first swivel (116) is fixedly connected to the limiting ring (125). The invention is connected with evenly distributed vertical frames (123), one end of the vertical frames (123) away from the slip ring (115) is fixedly connected to 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 to a telescopic rod (122), one end of the telescopic rod (122) away from the sleeve (111) is fixedly connected to a limit block (113), the bottom of the limit block (113) is slidably connected to a limit pull rod (108), the fixed block (112) and the limit pull rod (108) are slidably connected, the limit pull rod (108) is penetrated by an ear block 1 (130) and an ear block 2 (132), the ear block 1 (130) is fixedly connected to the middle ring (10 2) periphery, the second ear block (132) is fixedly connected to the periphery of the outlet end (106), the periphery of the end of the limit rod (108) away from the limit block (113) is provided with a second threaded section (131), the limit rod (108) is threadedly connected to two fixing nuts (107) through the second threaded section (131), the fixing nuts (107) are arranged on both sides of the second ear block (132), the periphery of the slip ring (115) inside the second rotating ring (117) is fixedly connected with a fixing ring (109), the side of the fixing 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 equipped with a storage ring (119),The bottom of one end of the limit rod (108) is fixedly connected to a fixed rod (120), one end of the fixed rod (120) away from the limit rod (108) is threadedly connected to a ferrule (121), one end of the ferrule (121) away from the fixed rod (120) is threadedly connected to the inside of the stand (123), one end of the push rod (118) away from the fixed ring (109) is fixedly connected to a push plate, 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, the water outlets are all installed with through pipes (110), and one end of the through pipe (110) away from the water outlet is fixedly connected to a sleeve (111).

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. 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).

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