Spring-supported zero-thrust elbow expansion joint

Abstract

The invention discloses a spring-supported thrust-free elbow expansion joint, and relates to the technical field of pipeline compensation devices, the spring-supported thrust-free elbow expansion joint comprises a pipe body mechanism, the pipe body mechanism comprises an inlet connecting pipe, one end of the inlet connecting pipe is connected with a spring-supported thrust-free expansion joint, and one end of the spring-supported thrust-free expansion joint is connected with a middle connecting pipe. The sleeve ring is arranged on the outer side of the pipeline in a sleeving mode, the inner elastic piece and the outer elastic piece are used for supporting the inner side and the outer side of the spring supporting non-thrust expansion section correspondingly, the inner elastic piece and the outer elastic piece are both provided with a first spring piece and an inner guide rod, and the first spring piece and the inner guide rod are connected and installed conveniently; and the inner guide rod movably penetrates through the inner side of the penetrating seat, so that the axial impact force is conveniently counteracted through the elastic force generated by the first spring piece, the inner guide rod provides stable guide force in the process, and the stability is kept. And a limiting effect is provided through the limiting block, so that the falling condition is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline compensation device, in particular to a spring supporting no thrust elbow pipe expansion joint. BACKGROUND

[0002] In industrial pipeline systems, due to factors such as temperature changes of the medium and temperature fluctuations of the external environment, the pipeline will produce thermal expansion and cold contraction deformation. If this deformation cannot be effectively compensated, it will produce a huge stress inside the pipeline, leading to pipeline interface leakage, pipeline bending and even rupture, etc. faults, affecting the safe and stable operation of the entire pipeline system. As an important pipeline compensation element, the elbow pipe expansion joint can absorb the thermal expansion and cold contraction of the pipeline by using the flexible deformation of its own structure, thereby reducing the stress of the pipeline.

[0003] In the prior art, such as patent application No. CN201410599905.5 "bypass elbow pressure balance type expansion joint", including the inlet pipe (1), the working corrugated pipe (3) and the balance corrugated pipe (9); The other end of the balance corrugated pipe (9) is fixedly connected with one end of the outer pipe (4) through the end ring II (7); The other end of the outer pipe (4) is connected with the end ring I (2), and the end ring I (2) and the working corrugated pipe (3) are connected, so that the outer pipe (4) and the inlet pipe (1) form a cavity for medium flow; The inlet pipe (1) has a medium flow hole for communicating with the cavity; The outer pipe (4) is connected with the outlet branch pipe (8) which communicates with the cavity; The axis of the outlet branch pipe (8) and the axis of the inlet pipe (1) have an included angle; It has the characteristics of high safety and reliability, no pressure thrust effect on the pipe support.

[0004] The existing no-thrust expansion joint uses a complex linkage mechanism or a balancing device to offset the axial thrust, which has a complex structure, is inconvenient to maintain, and the compensation amount and the applicable pressure range are greatly limited. In the high-pressure and large-compensation pipeline system, the application effect is not good. In view of the above problems, a spring supporting no-thrust elbow pipe expansion joint is proposed. SUMMARY

[0005] The purpose of the present application is to provide a spring supporting no-thrust elbow pipe expansion joint to solve the problem of the prior art that the no-thrust expansion joint uses a complex linkage mechanism or a balancing device to offset the axial thrust when operating, which has a complex structure, is inconvenient to maintain, and the compensation amount and the applicable pressure range are greatly limited. In the high-pressure and large-compensation pipeline system, the application effect is not good.

[0006] To achieve the above object, the present application provides the following technical scheme: a spring support no-thrust elbow pipe expansion joint, comprising a pipe body mechanism, the pipe body mechanism comprises an inlet pipe, one end of the inlet pipe is connected with a spring support no-thrust expansion joint, one end of the spring support no-thrust expansion joint is connected with a middle connecting pipe, one end of the middle connecting pipe is connected with a bellows, and one end of the bellows is connected with an outlet pipe; The spring mechanism comprises inner elastic sheets and outer elastic sheets, the side surfaces of the inner elastic sheets and the outer elastic sheets are provided with middle sections, the side surfaces are fixedly connected with first spring members for elastic support, the side surfaces are fixedly connected with inner guide rods and penetrate the inner sides of the first spring members, one end of the first spring member is fixedly connected with a penetrating seat, and the inner guide rods movably penetrate the inner sides of the penetrating seat.

[0007] Preferably, the spring mechanism further comprises a reinforcing rib mechanism, the reinforcing rib mechanism comprises two reinforcing ribs, outer walls of the two reinforcing ribs are provided with mounting rings at both ends, outer sides of the mounting rings are connected with second spring members, outer sides of the mounting rings are connected with damping telescopic rods, and the second spring members are sleeved on the outer sides of the damping telescopic rods.

[0008] Preferably, one end of the damping telescopic rod is fixedly connected with a fixed seat, one end of the second spring member is fixedly connected to the fixed seat, and reinforcing rings are connected between the two fixed seats and are sleeved on the inlet pipe and the middle connecting pipe.

[0009] Preferably, outer sides of the pipe body mechanism are provided with support mechanisms, the support mechanisms comprise bottom support fixed plates, top portions of the bottom support fixed plates are fixedly provided with bottom support frames, top portions of the bottom support frames are distributed with a plurality of damping rods, and outer sides of the damping rods are provided with third spring members.

[0010] Preferably, top portions of the damping rods are provided with limiting bottom frames, inner sides of the limiting bottom frames are fixedly and symmetrically provided with limiting bottom frames, top portions of the limiting bottom frames are connected with limiting top frames, inner sides of the limiting top frames are symmetrically provided with side support blocks, and inner side top portions of the limiting top frames are provided with top support blocks.

[0011] Preferably, top portions of the bottom support fixed plates are provided with fixed holes penetrating the four corners, and inner sides of the bottom support frames are fixedly provided with inner support members.

[0012] Preferably, bottom portions of the damping rods are fixedly provided with connecting seats, the connecting seats are fixedly provided on top portions of the bottom support frames, outer sides of the connecting seats are uniformly distributed with a plurality of side support elastic sheets, both ends of the limiting top frames are symmetrically and penetratingly provided with fastening bolts, and the fastening bolts are penetratingly connected to top portions of the limiting bottom frames.

[0013] Preferably, the two ends of the reinforcing rib are connected to mounting blocks, the top of the mounting block is provided with a fastener, the top of the fastener is provided with a mounting pin, and the two ends of the reinforcing rib are fixedly connected with limiters.

[0014] Preferably, the inner and outer springs are provided with connecting bolts at both ends, and a collar is provided between the two connecting bolts. One end of the inner guide rod is fixedly connected to a limit block, a support column is fixedly installed at the bottom of the through seat, and a fixed base plate is fixedly installed at the bottom of the support column.

[0015] Preferably, an inlet flange is fixedly connected to the other end of the inlet pipe, and a plurality of first mounting holes are evenly distributed around the inlet flange along the axial direction. A connecting ring is fixedly connected to the outer side of the middle connecting pipe and the outlet pipe, and a plurality of guide rods are evenly distributed around the connecting ring along the axial direction. An outlet flange is installed on the side of the outlet pipe, and a plurality of second mounting holes are evenly distributed around the outlet flange along the axial direction. A limit ring is provided on the inner side of the inlet pipe and the outlet pipe, and a tungsten carbide inner tube is provided on the inner side of the limit ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, connecting bolts are symmetrically arranged on the outer sides of both collars to connect the inner and outer spring pieces, facilitating the placement of the collars on the outside of the pipe. The inner and outer spring pieces are respectively supported on the inner and outer sides of the spring-supported, thrust-free expansion section. Both the inner and outer spring pieces are equipped with features for connecting and installing the first spring element and the inner guide rod. One end of the first spring element is connected to the through-seat, and the inner guide rod moves through the inside of the through-seat, allowing the spring force generated by the first spring element to counteract the axial impact force. During this process, the inner guide rod provides a stable guiding force, maintaining stability. A limiting block provides a limiting function to prevent detachment. Support columns and a fixed base plate at the bottom ensure overall stability during use, improving safety.

[0017] 2. In this invention, a reinforcing ring is installed, and a damping telescopic rod is connected to it using a fixed base. The damping telescopic rod is then connected to a mounting ring fitted on the outside of the reinforcing rib. The damping telescopic rod provides support while simultaneously counteracting upward and downward impact forces with the second spring, further enhancing stability. Mounting blocks at both ends of the reinforcing rib facilitate locking with snap-fit ​​components and the tightening action of mounting pins, providing stability and improving usability. Limiting components at the ends provide a limiting function, effectively preventing detachment while utilizing the reinforcing rib's enhanced support strength.

[0018] 3. In this invention, a base support plate provides installation support, with fixing holes for bolt fixation. A base support frame, fixed to the base support plate, provides erection support. The inner side of the base support frame has an inner support component, further enhancing stability. Connecting seats are distributed at the top of the base support frame, facilitating the installation of the damping rod and the third spring component. These, along with side support springs, form a flexible support. A limiting bottom frame connects to the top support, and a limiting top frame is provided at the top of the limiting bottom frame. The limiting bottom frame and the limiting top frame cooperate to achieve a secure installation. Side support blocks and top support blocks are respectively provided on the inner sides of the limiting bottom frame and the limiting top frame, forming a stable inner support. This provides a stable erection support effect, reduces impact during operation, and further improves stability during use. Attached Figure Description

[0019] Figure 1 This is a perspective view of a spring-supported, thrust-free bend expansion joint according to the present invention. Figure 2 This is a three-dimensional structural diagram of a spring-supported, thrust-free bend expansion joint according to the present invention from another angle. Figure 3 This is a partial structural schematic diagram of a spring-supported, thrust-free bend expansion joint according to the present invention. Figure 4 This is a schematic diagram of the spring mechanism of a spring-supported thrustless bend expansion joint according to the present invention. Figure 5 This is a schematic diagram of the support mechanism for a spring-supported, thrust-free bend expansion joint according to the present invention. Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the diagram; Figure 7 This is a schematic diagram of the reinforcing rib mechanism of a spring-supported thrustless bend expansion joint according to the present invention. Figure 8 For the present invention Figure 7 A magnified structural diagram at point B in the diagram.

[0020] In the picture: 1. Pipe body mechanism; 101. Inlet flange; 102. First mounting hole; 103. Inlet pipe; 104. Spring-supported thrustless expansion joint; 105. Middle connecting pipe; 106. Connecting ring; 107. Bellows; 108. Outlet pipe; 109. Guide rod; 110. Outlet flange; 111. Second mounting hole; 112. Limiting ring; 113. Tungsten carbide inner tube; 2. Spring mechanism; 201. Collar; 202. Connecting bolt; 203. Inner spring; 204. Outer spring; 205. Connecting seat; 206. First spring component; 207. Inner guide rod; 208. Through seat; 209. Limiting block; 210. Support column; 2 11. Fixed base plate; 3. Reinforcing rib mechanism; 301. Reinforcing ring; 302. Fixed seat; 303. Damping telescopic rod; 304. Second spring component; 305. Mounting ring; 306. Reinforcing rib; 307. Mounting block; 308. Buckle component; 309. Mounting pin; 310. Limiting component; 4. Support mechanism; 401. Bottom support fixing plate; 402. Fixing hole; 403. Bottom support frame; 404. Inner support component; 405. Connecting seat; 406. Damping rod; 407. Third spring component; 408. Side support spring; 409. Limiting bottom frame; 410. Limiting top frame; 411. Side support block; 412. Top support block; 413. Fastening bolt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: As Figures 1-8As shown, the present invention provides a technical solution: a spring-supported thrust-free bend expansion joint, comprising a pipe body mechanism 1, the pipe body mechanism 1 including an inlet pipe 103, one end of the inlet pipe 103 being connected to a spring-supported thrust-free expansion joint 104, one end of the spring-supported thrust-free expansion joint 104 being connected to a middle connecting pipe 105, one end of the middle connecting pipe 105 being connected to a bellows 107, one end of the bellows 107 being connected to an outlet pipe 108, and the other end of the inlet pipe 103 being fixedly connected to an inlet flange 101. 1. Several first mounting holes 102 are evenly distributed around the axial direction. A connecting ring 106 is fixedly connected to the outer side of the middle connecting pipe 105 and the outlet pipe 108. Several guide rods 109 are evenly distributed around the axial direction of the connecting ring 106. An outlet flange 110 is installed on the side of the outlet pipe 108. Several second mounting holes 111 are evenly distributed around the axial direction of the outlet flange 110. A limit ring 112 is provided on the inner side of the inlet pipe 103 and the outlet pipe 108. A tungsten carbide inner tube 113 is provided on the inner side of the limit ring 112. Spring mechanism 2 includes an inner spring piece 203 and an outer spring piece 204. Both the inner and outer spring pieces 203 and 204 have a 205 on their side mid-sections. A first spring member 206 for elastic support is fixedly connected to the side of the 205. An inner guide rod 207 is fixedly connected to the side of the 205 and passes through the inner side of the first spring member 206. One end of the first spring member 206 is fixedly connected to a through seat 208. The inner guide rod 207 movably passes through the inner side of the through seat 208. Connecting bolts 202 are provided at both ends of the inner spring piece 203 and the outer spring piece 204. A collar 201 is provided between each of the two connecting bolts 202. A limit block 209 is fixedly connected to one end of the inner guide rod 207. A support column 210 is fixedly installed at the bottom of the through seat 208, and a fixed base plate 211 is fixedly installed at the bottom of the support column 210.

[0023] In this embodiment, the inlet pipe 103 is connected to the inlet position, and the spring-supported thrustless expansion joint 104 connects the inlet pipe 103 to the middle connecting pipe 105. This facilitates balancing of axial forces generated by the pipeline medium pressure at bends. The bellows 107 connects the middle connecting pipe 105 and the outlet pipe 108, facilitating the absorption of pipeline deformation during thermal expansion and contraction due to changes in pipeline internal temperature, thus preventing excessive stress on the pipeline. The inlet flange 101 facilitates the fastening of the inlet pipe 103 with bolts through the first mounting hole 102, achieving the connection function. The connecting ring 106, in conjunction with the guide rod 109, provides stability to the connection between the middle connecting pipe 105 and the outlet pipe 108. The outlet flange 110, in conjunction with the second mounting hole 111 and bolted connection, facilitates connection to the discharge outlet, enabling the discharge function. The limiting ring 112, located internally, facilitates the installation of the tungsten carbide inner tube 113. The tungsten carbide inner tube 113 effectively improves the wear resistance of the pipeline, resisting erosion during media flow.

[0024] The device features symmetrically fixed connecting bolts 202 on the outer surfaces of both collars 201. These bolts 202 are respectively fixed to the ends of the inner spring piece 203 and the outer spring piece 204. This connection structure significantly improves the ease of assembly of the collars 201, allowing for quick and precise placement of the collars onto the outer wall of the target pipe. In actual use, the inner spring piece 203 and the outer spring piece 204 can respectively fit and support the inner and outer sides of the spring-supported thrustless expansion joint 104, forming a bidirectional clamping support structure. Mounting holes 205 are provided on the surfaces of both the inner and outer spring pieces 203 and 204. These mounting holes 205 serve as connection fulcrums, facilitating precise positioning and secure installation of the first spring piece 206 and the inner guide rod 207. One end of the first spring member 206 is fixedly connected to the side wall of the through seat 208, while the inner guide rod 207 moves axially through the inner through hole of the through seat 208. When the spring-supported thrustless expansion joint 104 is subjected to axial impact force, the first spring member 206 can generate a reverse elastic force through its own elastic deformation, thereby effectively offsetting the axial impact force and achieving a buffering and shock-absorbing effect. At the same time, the inner guide rod 207 can reciprocate linearly along the through hole of the through seat 208, providing a smooth guide for the expansion and contraction deformation of the first spring member 206, avoiding problems such as skewness or twisting of the spring member, and ensuring the stability of the overall structure during the stress process. A limiting block 209 is also provided at the end of the inner guide rod 207. The outer diameter of the limiting block 209 is larger than the diameter of the inner through hole of the through seat 208, which can play a reliable limiting role during the operation of the structure, effectively preventing the inner guide rod 207 from falling out of the through hole of the through seat 208, and further improving the operational reliability of the device. A support column 210 is provided at the bottom of the device. The lower end of the support column 210 is fixedly connected to the fixed base plate 211. The fixed base plate 211 can be stably attached to the installation foundation surface. Through the cooperation of the support column 210 and the fixed base plate 211, a stable bottom support can be provided for the entire device, ensuring that the device maintains structural stability during long-term use and avoiding problems such as shaking and tipping that affect the use effect. This is beneficial to significantly improving the safety and durability of the device in practical applications.

[0025] Example 2: As Figure 7 and Figure 8As shown, it also includes a reinforcing rib mechanism 3, which includes two reinforcing ribs 306. Mounting rings 305 are fitted at both ends of the outer walls of the two reinforcing ribs 306. A second spring member 304 is connected to the outer side of the mounting rings 305, and a damping telescopic rod 303 is connected to the outer side of the mounting rings 305. The second spring member 304 is fitted on the outer side of the damping telescopic rod 303. One end of the damping telescopic rod 303 is fixedly connected to a fixing seat 302, and one end of the second spring member 304 is fixedly connected to the fixing seat 302. A reinforcing ring 301 is connected between the two fixing seats 302. The reinforcing ring 301 is fitted onto the inlet pipe 103 and the middle connecting pipe 105, respectively. Mounting blocks 307 are connected to both ends of the reinforcing ribs 306. A buckle member 308 is provided at the top of the mounting block 307, and a mounting pin 309 is provided through the top of the buckle member 308. Limiting members 310 are fixedly connected to both ends of the reinforcing ribs 306.

[0026] In this embodiment, a reinforcing ring 301 is fitted and installed, and a damping telescopic rod 303 is connected to it via a fixing seat 302. The damping telescopic rod 303 is then connected to a mounting ring 305 fitted on the outside of the reinforcing rib 306. The damping telescopic rod 303 provides support while simultaneously working with the second spring 304 to counteract upward and downward impact forces, further enhancing stability. Mounting blocks 307 are provided at both ends of the reinforcing rib 306 for easy engagement with the snap fastener 308 and the fastening action of the mounting pin 309, providing stability for the reinforcing rib 306 and improving operational stability. A limiting member 310 provides a limiting function at the end, thus utilizing the reinforcing rib 306 to provide enhanced support strength while ensuring operational stability and effectively preventing detachment.

[0027] Example 3: As Figure 5 and Figure 6As shown, a support mechanism 4 is provided on the outer side of the tube body mechanism 1. The support mechanism 4 includes a bottom support fixing plate 401. A bottom support frame 403 is fixedly installed on the top of the bottom support fixing plate 401. Several damping rods 406 are distributed on the top of the bottom support frame 403. A third spring member 407 is provided on the outer side of the damping rod 406. A limiting bottom frame 409 is provided on the top of the damping rod 406. A limiting bottom frame 409 is symmetrically fixedly installed on the inner side of the limiting bottom frame 409. A limiting top frame 410 is connected to the top of the limiting bottom frame 409. Side support blocks are symmetrically installed on the inner side of the limiting bottom frame 409. 411, a top support block 412 is provided on the inner top of the limiting top frame 410, and fixing holes 402 are provided through the four corners of the top of the bottom support fixing plate 401. An inner support member 404 is fixedly installed on the inner side of the bottom support frame 403. A connecting seat 405 is fixedly installed at the bottom of the damping rod 406. The connecting seat 405 is fixedly installed on the top of the bottom support frame 403. Several side support springs 408 are evenly distributed around the outer side of the connecting seat 405. Fastening bolts 413 are symmetrically installed through both ends of the limiting top frame 410. The fastening bolts 413 are connected through the top of the limiting bottom frame 409.

[0028] In this embodiment, a base support plate 401 provides installation support, and a fixing hole 402 is provided on the base support plate 401 for fixing with bolts. A base support frame 403 is fixed to the base support plate 401 to provide erection support. An inner support member 404 is provided on the inner side of the base support frame 403 to form an inner support, further improving the stability of use. The connecting seats 405 are distributed on the top of the base support frame 403, which facilitates the installation of the damping rod 406 and the third spring 407. Together with the side support springs 408, they form a flexible support. The support is connected at the top by the limiting bottom frame 409. The top of the limiting bottom frame 409 is provided with a limiting top frame 410. The limiting bottom frame 409 and the limiting top frame 410 cooperate with each other to achieve a fastening installation. The inner side of the limiting bottom frame 409 and the inner side of the limiting top frame 410 are respectively provided with side support blocks 411 and top support blocks 412 to form a stable inner support, thereby providing a stable erection support effect, reducing the impact force during operation, and further improving the stability during use.

[0029] In this invention, the spring-supported thrustless bend expansion joint, when in use, firstly connects the inlet pipe 103 to the inlet position. The spring-supported thrustless expansion joint 104 connects the inlet pipe 103 to the middle connecting pipe 105, facilitating axial force balancing at bends based on the pressure of the pipeline medium. The bellows 107 connects the middle connecting pipe 105 and the outlet pipe 108, facilitating the absorption of pipeline deformation during thermal expansion and contraction due to internal temperature changes, thus preventing excessive stress on the pipeline. The inlet flange 101 facilitates fastening the inlet pipe 103 with bolts using the first mounting hole 102, achieving the connection function. The connecting ring 106, in conjunction with the guide rod 109, provides stability to the connection between the middle connecting pipe 105 and the outlet pipe 108. The outlet flange 110, in conjunction with the second mounting hole 111 and bolted connection, facilitates connection to the discharge outlet, enabling the discharge function. The limiting ring 112 is located inside to facilitate the installation of the tungsten carbide inner tube 113. The tungsten carbide inner tube 113 can effectively improve the wear resistance of the pipeline and cope with the scouring during the flow of the medium. By symmetrically arranging connecting bolts 202 on the outer sides of the two collars 201, the inner spring piece 203 and the outer spring piece 204 are connected respectively, facilitating the placement of the collar 201 on the outside of the pipe. The inner spring piece 203 and the outer spring piece 204 are supported on the inner and outer sides of the spring-supported thrustless expansion joint 104 section, respectively. Each of the inner and outer spring pieces 203 and 204 has a 205 for connecting and installing the first spring piece 206 and the inner guide rod 207. One end of the first spring piece 206 is connected to the through seat 208, and the inner guide rod 207 moves through the inside of the through seat 208, allowing the elastic force generated by the first spring piece 206 to counteract the axial impact force. During this process, the inner guide rod 207 provides a stable guiding force to maintain stability. The limiting block 209 provides a limiting function to prevent detachment. The support column 210, in conjunction with the fixed base plate 211, ensures overall stability at the bottom, improving safety during use. The reinforcing ring 301 is installed and connected to the damping telescopic rod 303 via the fixing seat 302. The damping telescopic rod 303 is connected to the mounting ring 305 fitted on the outside of the reinforcing rib 306. The damping telescopic rod 303 provides support while working with the second spring 304 to counteract the impact force, further improving stability. Mounting blocks 307 are provided at both ends of the reinforcing rib 306 for easy engagement with the snap fastener 308 and the fastening action of the mounting pin 309, providing stability for the reinforcing rib 306 and improving stability during use. The limiting member 310 provides a limiting function at the end, thus utilizing the reinforcing rib 306 to provide enhanced support strength while ensuring stability during use and effectively preventing detachment. The base support fixing plate 401 provides installation support, and fixing holes 402 are provided on the base support fixing plate 401 for bolt fixation.The base support frame 403 is fixed to the base support fixing plate 401 to provide erection support. The inner side of the base support frame 403 is provided with an inner support member 404 to form an inner support, further improving the stability during use. The connecting seats 405 are distributed on the top of the base support frame 403, which facilitates the installation of the damping rod 406 and the third spring member 407, and forms a flexible support with the side support spring 408. The support is connected at the top by a limiting bottom frame 409. The top of the limiting bottom frame 409 is provided with a limiting top frame 410. The limiting bottom frame 409 and the limiting top frame 410 cooperate with each other to achieve a fastening installation. The inner side of the limiting bottom frame 409 and the inner side of the limiting top frame 410 are respectively provided with a side support block 411 and a top support block 412 to form a stable inner support, thereby providing a stable erection support effect, reducing the impact force during operation, and further improving the stability during use.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spring-supported, thrust-free bend expansion joint, comprising a pipe body mechanism (1), characterized in that: The pipe body mechanism (1) includes an inlet pipe (103), one end of which is connected to a spring-supported thrustless expansion joint (104), one end of which is connected to a middle connecting pipe (105), one end of which is connected to a bellows (107), and one end of which is connected to an outlet pipe (108). Spring mechanism (2) includes inner spring sheet (203) and outer spring sheet (204). The middle section of the side of both inner spring sheet (203) and outer spring sheet (204) is provided with (205). The side of the (205) is fixedly connected to a first spring member (206) for elastic support. The side of the (205) is fixedly connected to an inner guide rod (207) and passes through the inner side of the first spring member (206). One end of the first spring member (206) is fixedly connected to a through seat (208). The inner guide rod (207) moves through the inner side of the through seat (208).

2. The spring-supported thrust-free bend expansion joint according to claim 1, characterized in that: It also includes a reinforcing rib mechanism (3), which includes two reinforcing ribs (306). The outer ends of the two reinforcing ribs (306) are fitted with mounting rings (305). The outer side of the mounting rings (305) is connected to a second spring member (304). The outer side of the mounting rings (305) is connected to a damping telescopic rod (303). The second spring member (304) is fitted on the outer side of the damping telescopic rod (303).

3. The spring-supported thrustless bend expansion joint according to claim 2, characterized in that: One end of the damping telescopic rod (303) is fixedly connected to a fixed seat (302), and one end of the second spring (304) is fixedly connected to the fixed seat (302). A reinforcing ring (301) is connected between the two fixed seats (302), and the reinforcing ring (301) is respectively sleeved on the inlet pipe (103) and the middle connecting pipe (105).

4. The spring-supported thrustless bend expansion joint according to claim 1, characterized in that: A support mechanism (4) is provided on the outside of the tube body mechanism (1). The support mechanism (4) includes a bottom support fixing plate (401). A bottom support frame (403) is fixedly installed on the top of the bottom support fixing plate (401). Several damping rods (406) are distributed on the top of the bottom support frame (403). A third spring member (407) is provided on the outside of the damping rod (406).

5. The spring-supported thrustless bend expansion joint according to claim 4, characterized in that: The damping rod (406) is provided with a limiting bottom frame (409) at the top. The limiting bottom frame (409) is symmetrically fixedly installed on the inner side of the limiting bottom frame (409). The limiting bottom frame (409) is connected to the top of the limiting bottom frame (409). Side support blocks (411) are symmetrically installed on the inner side of the limiting bottom frame (409). Top support blocks (412) are provided on the top inner side of the limiting top frame (410).

6. The spring-supported thrustless bend expansion joint according to claim 5, characterized in that: The bottom support fixing plate (401) has four through holes (402) at the top corners, and the bottom support frame (403) has an inner support member (404) fixedly installed on the inner side.

7. The spring-supported thrustless bend expansion joint according to claim 6, characterized in that: The bottom of the damping rod (406) is fixedly installed with a connecting seat (405), the connecting seat (405) is fixedly installed on the top of the bottom support frame (403), and a number of side support springs (408) are evenly distributed around the outer side of the connecting seat (405). Fastening bolts (413) are symmetrically installed through both ends of the limiting top frame (410), and the fastening bolts (413) are connected through the top of the limiting bottom frame (409).

8. The spring-supported thrustless bend expansion joint according to claim 3, characterized in that: The reinforcing rib (306) is connected to two ends of an installation block (307), the top of the installation block (307) is provided with a fastener (308), the top of the fastener (308) is provided with an installation pin (309), and the two ends of the reinforcing rib (306) are fixedly connected with a limiting member (310).

9. The spring-supported thrustless bend expansion joint according to claim 1, characterized in that: The inner spring (203) and the outer spring (204) are provided with connecting bolts (202) at both ends, and a collar (201) is provided between the two connecting bolts (202). One end of the inner guide rod (207) is fixedly connected to a limit block (209). A support column (210) is fixedly installed at the bottom of the through seat (208), and a fixed base plate (211) is fixedly installed at the bottom of the support column (210).

10. The spring-supported thrustless bend expansion joint according to claim 1, characterized in that: An inlet flange (101) is fixedly connected to the other end of the inlet pipe (103). Several first mounting holes (102) are evenly distributed around the inlet flange (101) along the axial direction. A connecting ring (106) is fixedly connected to the outer side of the middle connecting pipe (105) and the outlet pipe (108). Several guide rods (109) are evenly distributed around the connecting ring (106) along the axial direction. An outlet flange (110) is installed on the side of the outlet pipe (108). Several second mounting holes (111) are evenly distributed around the outlet flange (110) along the axial direction. A limit ring (112) is provided on the inner side of the inlet pipe (103) and the outlet pipe (108). A tungsten carbide inner tube (113) is provided on the inner side of the limit ring (112).

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