A safer expansion joint for the return leg of a fluidized bed boiler

Abstract

The present invention relates to the technical field of fluidized bed boilers, and provides a fluidized bed boiler return leg expansion joint with higher safety, comprising: an inner cylinder one, wherein a cylinder body one is arranged on the outside of the inner cylinder one, and further comprising: a metal bellows, which is arranged on the outer surface of the cylinder body one, and a cylinder body two is arranged on the other end of the metal bellows; a plurality of connecting members one, which are respectively arranged on the outer surface of the cylinder body one and the outer surface of the cylinder body two, and a plurality of connecting members one are all provided with connecting rods on the inner walls; according to the present invention, when the connecting member one moves, it drives the telescopic block, the circular plate one, the connecting rod, the circular plate two and the through hole to move, and when the circular plate one moves, it stretches the elastic member two, and when the through hole moves in the reinforcement pipe, it rubs against the oil body, so as to reduce the movement amplitude of the circular plate two and the connecting rod, and when the metal bellows returns to its original state, the elastic member two drives the circular plate two and the connecting rod to return to their original position, which is beneficial to assisting the metal bellows to telescope and extend, and avoids affecting the use effect of the expansion joint.

Description

Technical Field

[0001] The invention relates to the technical field of fluidized bed boilers, in particular to a fluidized bed boiler return leg expansion joint with higher safety. Background Art

[0002] The return leg expansion joint of a fluidized bed boiler is an important component in the design of a circulating fluidized bed boiler. It is used to compensate for the length change of the return leg during thermal expansion and contraction, and to prevent stress caused by temperature changes from damaging the boiler structure.

[0003] However, the existing technology has the following disadvantages when used: the existing expansion joint uses a metal bellows to offset the stress caused by thermal expansion and contraction, thereby achieving the effect of protecting the return leg, and the two ends of the existing expansion joint are reinforced with structures such as reinforcement rods and nuts to achieve the effect of improving the stability of the expansion joint, but the length of the reinforcement rod is fixed, which will limit the deformation amplitude of the metal bellows, resulting in affected use effect of the expansion joint. In addition, after the manufacturer makes the expansion joint, it is necessary to use a transportation tool to transport the expansion joint to the user, but there will be bumps during transportation, causing the expansion joint to vibrate, and the vibration will be transmitted to the metal bellows, causing the metal bellows to deform to a certain extent during transportation. This deformation will cause stress accumulation in the metal bellows, which is not conducive to protecting the metal bellows. Therefore, there is an urgent need for a fluidized bed boiler return leg expansion joint with higher safety to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the existing expansion joint uses metal bellows to offset the stress caused by thermal expansion and contraction to achieve the effect of protecting the return leg. The two ends of the existing expansion joint are reinforced with structures such as reinforcement rods and nuts to achieve the effect of improving the stability of the expansion joint. However, the length of the reinforcement rod is fixed, which will limit the deformation amplitude of the metal bellows, resulting in affected use effect of the expansion joint. In addition, after the manufacturer makes the expansion joint, it is necessary to use a transportation tool to transport the expansion joint to the user, but bumps will occur during transportation, causing the expansion joint to vibrate, and the vibration will be transmitted to the metal bellows, causing the metal bellows to deform to a certain extent during transportation. This deformation will cause stress accumulation in the metal bellows, which is not conducive to protecting the metal bellows.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a fluidized bed boiler return leg expansion joint with higher safety, comprising: an inner cylinder 1, a cylinder body 1 is provided on the outside of the inner cylinder 1, and further comprising:

[0006] A metal bellows is provided on the outer surface of the cylinder body 1, and the other end of the metal bellows is provided with the cylinder body 2;

[0007] A plurality of connecting members 1 are respectively provided on the outer surface of the cylinder 1 and the outer surface of the cylinder 2, and the inner walls of the plurality of connecting members 1 are all provided with connecting rods;

[0008] A plurality of mounting holes are respectively provided at one end of the plurality of connecting rods close to the first connecting member, and the inner walls of the plurality of mounting holes are each provided with two telescopic blocks;

[0009] A plurality of elastic members 1 are respectively arranged on the outer surfaces of the plurality of telescopic blocks, and a circular plate 1 is arranged on one end of the plurality of connecting rods close to the connecting member 1.

[0010] Preferably, the outer surfaces of the multiple telescopic blocks are respectively aligned with the outer surfaces of the two groups of connecting parts, the outer surfaces of the multiple telescopic blocks are each provided with a connecting block, the outer surfaces of the multiple connecting blocks are each provided with a threaded rod, the outer surfaces of the multiple threaded rods are respectively provided on the inner walls of the multiple connecting rods, and the other ends of the multiple threaded rods are each provided with a round block.

[0011] The technical effect of adopting the above-mentioned further scheme is as follows: cylinder one, metal bellows and cylinder two are connected into a whole, the metal bellows has good elasticity and reduces the stress in the pipeline system, the inner cylinder one is inside the cylinder one, the metal bellows and cylinder two, and the inner walls of the cylinder one and the cylinder two are fixedly connected to the two fixing rings respectively. The outer surfaces of the two fixing rings are movably connected to the pipe body, which is convenient for the pipe body to be expanded and contracted on the two fixing rings. A plurality of connecting parts are distributed on the outer surfaces of the cylinder one and the cylinder two. The staff holds the reinforcement pipe and inserts the round blocks and connecting rods at both ends into the two When the staff rotates the round block, the threaded rod is driven to rotate. The round block includes but is not limited to a rubber block. When the threaded rod rotates in the connecting rod, it drives the connecting block, the telescopic block and the elastic member to move toward the circular plate.

[0012] Preferably, multiple horizontal plates are installed on the outer surfaces of multiple circular plates one, multiple elastic parts two are provided on the outer surfaces of multiple elastic parts two, multiple reinforcement tubes are provided at the opposite ends of multiple reinforcement tubes, the inner walls of multiple reinforcement tubes are respectively provided on the outer surfaces of multiple connecting rods, and multiple limiting rods are provided on the inner walls of multiple connecting rods.

[0013] The technical effect of adopting the above-mentioned further scheme is: the setting of the horizontal plate makes it convenient for the staff to pull the connecting rod, and the two ends of the elastic part 2 are respectively fixed on the outer surface of the reinforcement tube and the outer surface of the circular plate 1, so as to enhance the stability of the elastic part 2, the reinforcement tube and the circular plate 1.

[0014] Preferably, a plurality of the connecting rods are each provided with a circular plate 2 at one end away from the circular plate 1, the outer surfaces of the two groups of the circular plates 2 are each provided with a through hole, the inner walls of the plurality of the circular plates 2 are respectively provided on the outer surfaces of the plurality of limit rods, the outer surfaces of the plurality of the circular plates 2 are respectively provided on the inner walls of the plurality of reinforcement tubes, and the outer surfaces of the plurality of the connecting blocks are respectively provided on the inner walls of the plurality of mounting holes.

[0015] The technical effect of adopting the above further scheme is: the through hole rubs against the oil body when moving in the reinforced tube, which is convenient for reducing the movement range of the circular plate 2 and the connecting rod. The setting of the limit rod is convenient for preventing the circular plate 2 from rotating, thereby improving the stability of the circular plate 2 when moving.

[0016] Preferably, a connecting piece 2 is provided at one end of the cylinder 1 away from the metal bellows, and two fixing rings are provided on the outside of the inner cylinder 1. The outer rings of the two fixing rings are respectively provided on the inner wall of the cylinder 1 and the inner wall of the cylinder 2. The outer surfaces of the two fixing rings are provided with a tube body, and the outer surface of the tube body is provided with an insulation ring.

[0017] The technical effect of adopting the above further solution is: the inner walls of cylinder one and cylinder two are fixedly connected to the two fixing rings respectively, and the outer surfaces of the two fixing rings are movably connected to the tube body, which facilitates the expansion and contraction of the tube body on the two fixing rings.

[0018] Preferably, the outer surface of the insulation ring is arranged on the inner wall of cylinder one and the inner wall of cylinder two, the inner ring of the tube body is provided with inner cylinder two, the outer surface of the inner cylinder two is arranged on the inner wall of multiple connecting parts two, the outer surface of the tube body is provided with multiple connecting parts three, and the multiple connecting parts three are provided with limiting blocks at one end away from the tube body.

[0019] The technical effect of adopting the above-mentioned further solution is as follows: the tube body and the inner tube 2 are movably connected to provide space for the inner tube 2 to expand and contract, the inner wall of the connecting member 2 is movably connected to the outer surface of the inner tube 2, which facilitates the expansion and contraction of the inner tube 2 within the connecting member 2, and the setting of the connecting member 3 facilitates the connection with the inner tube 1.

[0020] Preferably, a plurality of buffer grooves are provided at one end of the inner cylinder one, the outer surfaces of the plurality of limit blocks are respectively provided on the inner walls of the plurality of buffer grooves, the outer surface of the inner cylinder two is provided with a plurality of U-shaped blocks, the outer surfaces of the plurality of U-shaped blocks are all provided with L-shaped handles, and the inner walls of the plurality of U-shaped blocks are all provided with connecting frames.

[0021] The technical effect of adopting the above further solution is: the limit block on the connecting piece three is on the inner wall of the buffer groove, which makes it easy to prevent the inner cylinder one from rotating on the connecting piece three and the limit block, thereby improving the stability between the inner cylinder one and the connecting piece three.

[0022] Preferably, the outer surfaces of the multiple connecting frames are respectively arranged on the outer surfaces of the L-shaped handles, the outer surfaces of the multiple connecting frames are all provided with clamping plates, the outer surfaces of the multiple clamping plates are respectively in contact with the outer surfaces of the multiple U-shaped blocks, the outer surfaces of the multiple clamping plates are in contact with the outer surface of the inner cylinder two, and the outer surfaces of the multiple clamping plates are all provided with elastic parts three.

[0023] The technical effect of adopting the above further solution is: the connecting piece is used in conjunction with the L-shaped handle, which facilitates the connecting piece to move on the outer surface of the L-shaped handle, and the clamping plate contacts the outer surface of the inner tube 2, which facilitates the clamping plate to cooperate with the U-shaped block to clamp the inner tube 2.

[0024] Preferably, the other ends of the multiple elastic members are respectively arranged on the outer surface of the U-shaped block, the multiple connecting frames are each provided with a connecting plate at one end away from the clamping plate, the other ends of the multiple connecting plates are each provided with a multiple linkage plates, the other ends of the multiple groups of linkage plates are each provided with a handle, and the other ends of the multiple handles are respectively arranged on the outer surfaces of the multiple L-shaped handles.

[0025] The technical effect of adopting the above further scheme is: the staff holds the L-shaped handle and pulls the handle with four fingers to drive the linkage plate to move. When the linkage plate moves, it drives the connecting plate and the connecting frame away from the handle. When the connecting frame moves, it drives the clamping plate to compress the elastic part three.

[0026] Preferably, a plurality of the U-shaped blocks are provided with a rectangular plate 1 on their outer surfaces, a plurality of the rectangular plate 1 are provided with a damping shock absorber on one side away from the U-shaped block, a plurality of the damping shock absorbers are provided with a rectangular plate 2 on the other end, a plurality of the rectangular plate 2 are provided with an elastic member 4 on their outer surfaces, and the other ends of the plurality of the elastic members 4 are respectively provided on the outer surfaces of the plurality of rectangular plates 1.

[0027] The technical effect of adopting the above further solution is: the damping vibration absorber and the elastic member four are fixed between the rectangular plate one and the rectangular plate two, and the damping vibration absorber and the elastic member four cooperate to play a buffering and shock-absorbing role.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are:

[0029] 1. In the present invention, when the connecting member 1 moves, it drives the telescopic block, the circular plate 1, the connecting rod, the circular plate 2 and the through hole to move. When the circular plate 1 moves, the elastic member 2 is stretched. When the through hole moves in the reinforcement tube, it rubs against the oil body, which is convenient for reducing the movement amplitude of the circular plate 2 and the connecting rod. When the metal bellows returns to its original state, the elastic member 2 drives the circular plate 2 and the connecting rod to return to their original positions, which is beneficial to assisting the metal bellows to expand and contract, and avoids affecting the use effect of the expansion joint.

[0030] 2. In the present invention, a damping vibration absorber and an elastic member 4 are fixed between the rectangular plate 1 and the rectangular plate 2. The rectangular plate 2 is in contact with the transport vehicle. The damping vibration absorber, the rectangular plate 1 and the U-shaped block are used to facilitate the lifting of the inner cylinder 2 and the inner cylinder 1, thereby preventing the inner cylinder 2 from directly contacting the transport vehicle. The damping vibration absorber and the elastic member 4 cooperate to play a buffering and shock-absorbing role, thereby facilitating the prevention of the bumps and vibrations generated during transportation from being directly transmitted to the metal bellows, thereby facilitating the protection of the metal bellows. After the metal bellows is transported to the destination, the staff separates the U-shaped block from the inner cylinder 2, thereby facilitating the continued use of the U-shaped block during the next transportation, thereby saving costs.

[0031] 3. In the present invention, when a staff member rotates the round block, the threaded rod is driven to rotate as well. The round block includes but is not limited to a rubber block. When the threaded rod rotates in the connecting rod, the connecting block, the telescopic block and the elastic member are driven to move toward the circular plate. The telescopic block is used in conjunction with the circular plate to clamp and fix the connecting member, thereby improving the stability between the connecting rod and the connecting member, facilitating the application of connecting members of different thicknesses, and improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a return leg expansion joint for a fluidized bed boiler with higher safety provided by the present invention;

[0033] Figure 2 A schematic diagram of the bottom view of the structure of a return leg expansion joint of a fluidized bed boiler with higher safety provided by the present invention;

[0034] Figure 3 A schematic diagram of a partial top view of the structure of a return leg expansion joint of a fluidized bed boiler with higher safety provided by the present invention;

[0035] Figure 4 A schematic diagram of a partial cross-sectional structure of a return leg expansion joint of a fluidized bed boiler with higher safety provided by the present invention;

[0036] Figure 5 A schematic diagram of the U-shaped block structure of a return leg expansion joint of a fluidized bed boiler with higher safety provided by the present invention;

[0037] Figure 6 A schematic cross-sectional view of a reinforcement pipe of a return leg expansion joint of a fluidized bed boiler with higher safety provided by the present invention;

[0038] Figure 7 The invention provides a fluidized bed boiler return leg expansion joint with higher safety Figure 4 A magnified view of point A;

[0039] Figure 8 The invention provides a fluidized bed boiler return leg expansion joint with higher safety Figure 4 Enlarged view of point B.

[0040] Legend:

[0041] 1. Inner tube 1; 101. Buffer groove; 2. Reinforcement tube; 201. Elastic member 2; 202. Circular plate 1; 203. Connecting rod; 204. Circular plate 2; 205. Limiting rod; 206. Mounting hole; 207. Telescopic block; 208. Circular block; 209. Through hole; 210. Horizontal plate; 211. Threaded rod; 212. Connecting block; 213. Elastic member 1; 3. U-shaped block; 301. Rectangular plate 1; 302. Damping shock absorber; 303 , rectangular plate two; 304, elastic part four; 4, cylinder one; 401, connecting part two; 402, metal bellows; 403, cylinder two; 404, connecting part three; 405, connecting part one; 406, fixing ring; 407, tube body; 408, insulation ring; 409, inner cylinder two; 410, limit block; 5, L-shaped handle; 6, connecting frame; 601, connecting plate; 7, clamping plate; 8, elastic part three; 9, linkage plate; 10, handle. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Example 1, as Figure 1-8 As shown, the present invention provides a technical solution: a fluidized bed boiler return leg expansion joint with higher safety, comprising: an inner tube 1, a cylinder 4 is provided on the outside of the inner tube 1, and further comprising:

[0044] A metal bellows 402 is provided on the outer surface of the cylinder 1 4, and a cylinder 2 403 is provided at the other end of the metal bellows 402;

[0045] A plurality of connecting members 405 are respectively provided on the outer surface of the cylinder 1 4 and the outer surface of the cylinder 2 403, and the inner walls of the plurality of connecting members 405 are all provided with connecting rods 203;

[0046] Multiple mounting holes 206 are respectively provided at one end of the multiple connecting rods 203 close to the connecting piece 405, and the inner walls of the multiple mounting holes 206 are each provided with two telescopic blocks 207;

[0047] The plurality of elastic members 213 are respectively disposed on the outer surfaces of the plurality of telescopic blocks 207 , and the plurality of connecting rods 203 are each provided with a circular plate 202 at one end thereof close to the connecting member 405 .

[0048] In one embodiment, the cylinder 1 4, the metal bellows 402 and the cylinder 2 403 are connected to form a whole, so that the metal bellows 402 has good elasticity, which is convenient for reducing the stress in the pipeline system. The inner cylinder 1 is located inside the cylinder 1 4, the metal bellows 402 and the cylinder 2 403. The inner walls of the cylinder 1 4 and the cylinder 2 403 are fixedly connected to two fixing rings 406 respectively. The outer surfaces of the two fixing rings 406 are movably connected to the pipe body 407, which is convenient for the pipe body 407 to be extended and retracted on the two fixing rings 406. A plurality of connecting parts 1 405 are distributed on the outer surfaces of the cylinder 1 4 and the cylinder 2 403. The staff holds the reinforcing tube 2 and inserts the round blocks 208 and the connecting rod 203 at both ends into the two connecting parts 405 respectively. After the connecting rod 203 drives the telescopic block 207 to contact the inner wall of the connecting part 405, the telescopic block 207 is pushed into the inside of the mounting hole 206. The movement of the telescopic block 207 causes the elastic part 213 to deform. After the telescopic block 207 passes through the connecting part 405, the elastic part 213 pops the telescopic block 207 out of the mounting hole 206. The telescopic block 207 includes but is not limited to a hollow iron block. The telescopic block 207 is used in conjunction with the circular plate 202 to clamp and fix the connecting part 405.

[0049] In another embodiment, the cylinder 1 4, the metal bellows 402 and the cylinder 2 403 are connected to form a whole, so that the metal bellows 402 has good elasticity, which is convenient for reducing the stress in the pipeline system. The inner cylinder 1 is located inside the cylinder 1 4, the metal bellows 402 and the cylinder 2 403. The inner walls of the cylinder 1 4 and the cylinder 2 403 are fixedly connected to two fixing rings 406 respectively. The outer surfaces of the two fixing rings 406 are movably connected to the pipe body 407, which is convenient for the pipe body 407 to be extended and retracted on the two fixing rings 406. A plurality of connecting parts 405 are distributed on the outer surfaces of the cylinder 1 4 and the cylinder 2 403. The operator holds the reinforcing tube 2 and inserts the round blocks 208 and the connecting rod 203 at both ends into the two connecting parts 405 respectively. After the connecting rod 203 drives the telescopic block 207 to contact the inner wall of the connecting part 405, the telescopic block 207 is pushed into the mounting hole 206. The movement of the telescopic block 207 causes the elastic part 213 to deform. After the telescopic block 207 passes through the connecting part 405, the elastic part 213 pops the telescopic block 207 out of the mounting hole 206. The telescopic block 207 includes but is not limited to a hollow aluminum alloy block. The telescopic block 207 is used in conjunction with the circular plate 202 to clamp and fix the connecting part 405.

[0050] Example 2, as Figure 1-8As shown, the outer surfaces of the multiple telescopic blocks 207 are respectively connected to the outer surfaces of the two sets of connecting members 405, the outer surfaces of the multiple telescopic blocks 207 are provided with connecting blocks 212, the outer surfaces of the multiple connecting blocks 212 are provided with threaded rods 211, the outer surfaces of the multiple threaded rods 211 are respectively provided on the inner walls of the multiple connecting rods 203, the other ends of the multiple threaded rods 211 are provided with round blocks 208, the outer surfaces of the multiple circular plates 202 are installed with multiple horizontal plates 210, and the multiple circular plates 203 are provided with multiple horizontal plates 210. 02 is provided with an elastic member 201 on the outer surface, and a plurality of elastic members 201 are provided with a reinforcing tube 2 at the opposite end. The inner walls of the plurality of reinforcing tubes 2 are respectively provided on the outer surfaces of the plurality of connecting rods 203. The inner walls of the plurality of connecting rods 203 are provided with a plurality of limiting rods 205. The ends of the plurality of connecting rods 203 away from the circular plate 1 202 are provided with a circular plate 204. The outer surfaces of the two groups of circular plates 204 are provided with through holes 209. The inner walls of the plurality of circular plates 204 are respectively provided with On the outer surface of the plurality of limit rods 205, the outer surfaces of the plurality of circular plates 204 are respectively arranged on the inner walls of the plurality of reinforcement tubes 2, the outer surfaces of the plurality of connection blocks 212 are respectively arranged on the inner walls of the plurality of mounting holes 206, the end of the cylinder 1 4 away from the metal bellows 402 is provided with a connector 2 401, and the outer surface of the inner cylinder 1 is provided with two fixing rings 406, the outer rings of the two fixing rings 406 are respectively arranged on the inner wall of the cylinder 1 4 and the inner wall of the cylinder 2 403, and the two fixing rings 406 The outer surface of the tube body 407 is provided with a tube body 407, the outer surface of the tube body 407 is provided with an insulating ring 408, the outer surface of the insulating ring 408 is arranged on the inner wall of the cylinder 1 4 and the inner wall of the cylinder 2 403, the inner ring of the tube body 407 is provided with an inner cylinder 2 409, the outer surface of the inner cylinder 2 409 is arranged on the inner wall of the multiple connecting parts 2 401, the outer surface of the tube body 407 is provided with a plurality of connecting parts 3 404, and the multiple connecting parts 3 404 are provided with a limiting block 410 at one end away from the tube body 407.

[0051] In one embodiment, when the staff rotates the round block 208, the threaded rod 211 is driven to rotate. The round block 208 includes but is not limited to a rubber block. When the threaded rod 211 rotates in the connecting rod 203, it drives the connecting block 212, the telescopic block 207 and the elastic member 213 to move toward the circular plate 202. The telescopic block 207 is used to cooperate with the circular plate 202 to clamp and fix the connecting member 405, thereby improving the stability between the connecting rod 203 and the connecting member 405, facilitating the application of connecting members 405 of different thicknesses, and improving the scope of application. The interior of the reinforced pipe 2 is filled with oil. The oil body wraps the circular plate 204 and the through hole 209, and the elastic member 201 between the reinforcement tube 2 and the circular plate 1 202 is convenient for restoring the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 to their original positions inside and outside the reinforcement tube 2. When the metal bellows 402 expands and contracts, it drives the cylinder 1 4, the cylinder 2 403, and the connecting member 1 405 to move. When the connecting member 1 405 moves, it drives the telescopic block 207, the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 to move. When the circular plate 1 202 moves, the elastic member 201 is stretched. When the through hole 209 moves in the reinforcement tube 2, it rubs against the oil body, which is convenient for reducing the movement range of the circular plate 204 and the connecting rod 203. When the metal bellows 402 returns to its original shape, the elastic member 201 drives the circular plate 204 and the connecting rod 203 to return to their original position, which is beneficial for assisting the metal bellows 402 to extend and retract, and avoid affecting the use effect of the expansion joint. The setting of the limit rod 205 is convenient for preventing the circular plate 204 from rotating and improving the stability of the circular plate 204 when moving. The setting of the horizontal plate 210 is convenient for the staff to pull the connecting rod 203. The surface of the tube body 407 is breadth-rich. Wrapped with a heat-insulating ring 408, it is convenient to keep the temperature of the inner cylinder 1 and the inner cylinder 2 409 insulated. There is a gap of 1cm-3cm between the inner cylinder 1 and the inner cylinder 2 409, which is convenient for providing space for the inner cylinder 1 and the inner cylinder 2 409 to expand and contract. The connecting piece 3 404 is movably connected to the inner cylinder 1, which is convenient for the inner cylinder 1 to move on the connecting piece 3 404. The limiting block 410 on the connecting piece 3 404 is on the inner wall of the buffer groove 101, which is convenient for preventing the inner cylinder 1 from rotating on the connecting piece 3 404 and the limiting block 410, thereby improving the stability between the inner cylinder 1 and the connecting piece 3 404.

[0052] In another embodiment, when the staff rotates the round block 208, the threaded rod 211 is driven to rotate. The round block 208 includes but is not limited to a plastic block. When the threaded rod 211 rotates in the connecting rod 203, it drives the connecting block 212, the telescopic block 207 and the elastic member 213 to move toward the circular plate 202. The telescopic block 207 is used to cooperate with the circular plate 202 to clamp and fix the connecting member 405, thereby improving the stability between the connecting rod 203 and the connecting member 405, facilitating the application of connecting members 405 of different thicknesses, and improving the scope of application. The interior of the reinforced pipe 2 is filled with oil. The oil body wraps the circular plate 204 and the through hole 209, and the elastic member 201 between the reinforcement tube 2 and the circular plate 1 202 is convenient for restoring the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 to their original positions inside and outside the reinforcement tube 2. When the metal bellows 402 expands and contracts, it drives the cylinder 1 4, the cylinder 2 403, and the connecting member 1 405 to move. When the connecting member 1 405 moves, it drives the telescopic block 207, the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 to move. When the circular plate 1 202 moves, the elastic member 201 is stretched. When the through hole 209 moves in the reinforcement tube 2, it rubs against the oil body, which is convenient for reducing the movement range of the circular plate 204 and the connecting rod 203. When the metal bellows 402 returns to its original shape, the elastic member 201 drives the circular plate 204 and the connecting rod 203 to return to their original position, which is beneficial for assisting the metal bellows 402 to extend and retract, and avoid affecting the use effect of the expansion joint. The setting of the limit rod 205 is convenient for preventing the circular plate 204 from rotating and improving the stability of the circular plate 204 when moving. The setting of the horizontal plate 210 is convenient for the staff to pull the connecting rod 203. The surface of the tube body 407 is breadth-rich. Wrapped with a heat-insulating ring 408, it is convenient to keep the temperature of the inner cylinder 1 and the inner cylinder 2 409 insulated. There is a gap of 1cm-3cm between the inner cylinder 1 and the inner cylinder 2 409, which is convenient for providing space for the inner cylinder 1 and the inner cylinder 2 409 to expand and contract. The connecting piece 3 404 is movably connected to the inner cylinder 1, which is convenient for the inner cylinder 1 to move on the connecting piece 3 404. The limiting block 410 on the connecting piece 3 404 is on the inner wall of the buffer groove 101, which is convenient for preventing the inner cylinder 1 from rotating on the connecting piece 3 404 and the limiting block 410, thereby improving the stability between the inner cylinder 1 and the connecting piece 3 404.

[0053] Example 3, as Figure 1-8As shown, one end of the inner cylinder 1 is provided with a plurality of buffer grooves 101, the outer surfaces of the plurality of limit blocks 410 are respectively arranged on the inner walls of the plurality of buffer grooves 101, the outer surface of the inner cylinder 2 409 is provided with a plurality of U-shaped blocks 3, the outer surfaces of the plurality of U-shaped blocks 3 are respectively provided with L-shaped handles 5, the inner walls of the plurality of U-shaped blocks 3 are provided with connecting frames 6, the outer surfaces of the plurality of connecting frames 6 are respectively arranged on the outer surfaces of the L-shaped handles 5, the outer surfaces of the plurality of connecting frames 6 are provided with clamping plates 7, the outer surfaces of the plurality of clamping plates 7 are respectively in contact with the outer surfaces of the plurality of U-shaped blocks 3, the outer surfaces of the plurality of clamping plates 7 are in contact with the outer surface of the inner cylinder 2 409, the outer surfaces of the plurality of clamping plates 7 are provided with elastic members 3 8, and the other ends of the plurality of elastic members 3 8 are respectively provided On the outer surface of the U-shaped block 3, a plurality of connecting frames 6 are provided with a connecting plate 601 at one end away from the clamping plate 7, a plurality of connecting plates 601 are provided with a plurality of linkage plates 9 at the other end, a plurality of linkage plates 9 are provided with a handle 10 at the other end, and the other ends of the plurality of handles 10 are respectively provided on the outer surfaces of the plurality of L-shaped handles 5, a plurality of U-shaped blocks 3 are provided with a rectangular plate 1 301 on the outer surface, a plurality of rectangular plates 1 301 are provided with a damping shock absorber 302 on the side away from the U-shaped block 3, a plurality of damping shock absorbers 302 are provided with a rectangular plate 2 303 at the other end, a plurality of rectangular plates 2 303 are provided with an elastic member 4 304 on the outer surface, and the other ends of the plurality of elastic members 4 304 are respectively provided on the outer surfaces of the plurality of rectangular plates 1 301.

[0054] In one embodiment, the inner wall of the second connecting member 401 is movably connected to the outer surface of the second inner cylinder 409, so that the second inner cylinder 409 can be extended and retracted in the second connecting member 401. The staff member holds the L-shaped handle 5 and pulls the grip 10 with four fingers to drive the linkage plate 9 to move. When the linkage plate 9 moves, it drives the connecting plate 601 and the connecting frame 6 away from the grip 10. When the connecting frame 6 moves, it drives the clamping plate 7 to compress the elastic member 3 8. Then, the opposite side of the U-shaped block 3 and the clamping plate 7 are brought into contact with the outer surface of the second inner cylinder 409. The U-shaped block 3 includes but is not limited to a U-shaped solid iron block. After the staff member releases the grip 10, the elastic member 3 8 pushes the clamping plate 7 to cooperate with the U-shaped block 3 to clamp the second inner cylinder 409, so as to improve The stability between the U-shaped block 3 and the inner cylinder 2 409 is enhanced by the fixed connection between the U-shaped block 3 and the rectangular plate 1 301. The stability between the two is enhanced. The damping vibration absorber 302 and the elastic member 4 304 are fixed between the rectangular plate 1 301 and the rectangular plate 2 303. The rectangular plate 2 303 is in contact with the transportation vehicle. The damping vibration absorber 302, the rectangular plate 1 301 and the U-shaped block 3 are used to lift the inner cylinder 2 409 and the inner cylinder 1 to avoid direct contact between the inner cylinder 2 409 and the transportation vehicle. The damping vibration absorber 302 and the elastic member 4 304 cooperate to play a buffering and shock-absorbing role, so as to prevent the bumps and vibrations generated during transportation from being directly transmitted to the metal bellows 402, which is beneficial to protecting the metal bellows 402.

[0055] In another embodiment, the inner wall of the second connecting member 401 is movably connected to the outer surface of the second inner cylinder 409, so that the second inner cylinder 409 can be extended and retracted in the second connecting member 401. The staff member holds the L-shaped handle 5 and pulls the grip 10 with four fingers to drive the linkage plate 9 to move. When the linkage plate 9 moves, it drives the connecting plate 601 and the connecting frame 6 away from the grip 10. When the connecting frame 6 moves, it drives the clamping plate 7 to compress the elastic member 3 8, and then the opposite side of the U-shaped block 3 and the clamping plate 7 are brought into contact with the outer surface of the second inner cylinder 409. The U-shaped block 3 includes but is not limited to a U-shaped solid steel block. After the staff member releases the grip 10, the elastic member 3 8 pushes the clamping plate 7 to cooperate with the U-shaped block 3 to clamp the second inner cylinder 409, so as to improve The stability between the U-shaped block 3 and the inner cylinder 2 409 is enhanced by the fixed connection between the U-shaped block 3 and the rectangular plate 1 301. The stability between the two is enhanced. The damping vibration absorber 302 and the elastic member 4 304 are fixed between the rectangular plate 1 301 and the rectangular plate 2 303. The rectangular plate 2 303 is in contact with the transportation vehicle. The damping vibration absorber 302, the rectangular plate 1 301 and the U-shaped block 3 are used to lift the inner cylinder 2 409 and the inner cylinder 1 to avoid direct contact between the inner cylinder 2 409 and the transportation vehicle. The damping vibration absorber 302 and the elastic member 4 304 cooperate to play a buffering and shock-absorbing role, so as to prevent the bumps and vibrations generated during transportation from being directly transmitted to the metal bellows 402, which is beneficial to protecting the metal bellows 402.

[0056] Working principle: Cylinder 1 4, metal bellows 402 and cylinder 2 403 are connected into a whole, so that the metal bellows 402 has good elasticity, which is convenient for reducing the stress in the pipeline system. The inner cylinder 1 is inside the cylinder 1 4, metal bellows 402 and cylinder 2 403. The inner walls of cylinder 1 4 and cylinder 2 403 are fixedly connected to two fixing rings 406 respectively. The outer surfaces of the two fixing rings 406 are movably connected to the pipe body 407, which is convenient for the pipe body 407 to be stretched and retracted on the two fixing rings 406. Multiple connecting pieces 405 are distributed on the outer surfaces of cylinder 1 4 and cylinder 2 403. The staff holds the reinforcement pipe 2 and inserts the round blocks 208 and connecting rod 203 at both ends into the two connecting pieces 405 respectively. The connecting rod 20 After the telescopic block 207 is driven to contact the inner wall of the connecting piece 405, the telescopic block 207 is pushed into the mounting hole 206. The movement of the telescopic block 207 causes the elastic piece 213 to deform. After the telescopic block 207 passes through the connecting piece 405, the elastic piece 213 pops out of the mounting hole 206. When the staff rotates the round block 208, the threaded rod 211 is driven to rotate. The round block 208 includes but is not limited to a rubber block. When the threaded rod 211 rotates in the connecting rod 203, it drives the connecting block 212, the telescopic block 207 and the elastic piece 213 to move toward the circular plate 202. The telescopic block 207 is used in conjunction with the circular plate 202 to clamp and fix the connecting piece 405, thereby improving the connection between the connecting rod 203 and the connecting piece 1. The stability between 405 is conducive to the application of connectors 405 of different thicknesses, thereby improving the scope of application. The interior of the reinforcing tube 2 is filled with oil, which wraps the circular plate 204 and the through hole 209. The elastic member 201 between the reinforcing tube 2 and the circular plate 1 202 is convenient for restoring the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 inside and outside the reinforcing tube 2. When the metal bellows 402 expands and contracts, it drives the cylinder 1 4, the cylinder 2 403 and the connector 1 405 to move. When the connector 1 405 moves, it drives the telescopic block 207, the circular plate 1 202, the connecting rod 203, the circular plate 204 and the through hole 209 to move. The telescopic block 207 includes but is not limited to the use of a hollow iron block. The circular plate 1 202 moves. When the metal bellows 402 is restored to its original shape, the elastic member 201 is stretched. When the metal bellows 402 is in motion, the elastic member 201 is stretched. When the through hole 209 moves in the reinforcement tube 2, friction occurs with the oil body, which is convenient for reducing the movement range of the circular plate 204 and the connecting rod 203. When the metal bellows 402 is restored to its original shape, the elastic member 201 drives the circular plate 204 and the connecting rod 203 to return to their original position, which is conducive to assisting the metal bellows 402 to be telescopically extended and extended, and avoids affecting the use effect of the expansion joint. The setting of the limit rod 205 is convenient for preventing the circular plate 204 from rotating and improving the stability of the circular plate 204 when moving. The setting of the horizontal plate 210 is convenient for the staff to pull the connecting rod 203. When in use, the outer surface of the tube body 407 is wrapped with the heat insulation ring 408, which is convenient for keeping the temperature of the inner tube 1 and the inner tube 2 409 warm.There is a 1cm-3cm gap between the inner cylinder 1 and the inner cylinder 2 409, which is convenient for providing space for the inner cylinder 1 and the inner cylinder 2 409 to expand and contract. The connecting piece 3 404 is movably connected to the inner cylinder 1, which is convenient for the inner cylinder 1 to move on the connecting piece 3 404. The limit block 410 on the connecting piece 3 404 is on the inner wall of the buffer groove 101, which is convenient for preventing the inner cylinder 1 from rotating on the connecting piece 3 404 and the limit block 410, thereby improving the space between the inner cylinder 1 and the connecting piece 3 404. When the lever 402 is in the upright position, the lever 403 is in the upright position, and the lever 404 is in the upright position, so that the lever 402 can be adjusted relative to the upper and lower ends of the lever 404. When the lever 402 is in the upright position, the lever 403 is in the upright position, so that the lever 402 can be adjusted relative to the upper and lower ends of the lever 404. Elastic member 4 304 and rectangular plate 2 303 are in contact with the transport vehicle. Damping vibration absorber 302, rectangular plate 1 301, and U-shaped block 3 facilitate elevating inner cylinder 2 409 and inner cylinder 1 1, preventing inner cylinder 2 409 from directly contacting the transport vehicle. Damping vibration absorber 302 and elastic member 4 304 cooperate to provide a buffering and shock-absorbing effect, preventing bumps and vibrations generated during transportation from being directly transmitted to metal bellows 402, thereby protecting metal bellows 402.

[0057] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fluidized bed boiler return leg expansion joint with higher safety, comprising: An inner cylinder (1) is provided with a cylinder body (4) on the outside of the inner cylinder (1), and is characterized in that it further comprises: A metal bellows (402) is provided on the outer surface of the cylinder body 1 (4), and a cylinder body 2 (403) is provided at the other end of the metal bellows (402); A plurality of connecting members (405) are respectively provided on the outer surface of the cylinder body (4) and the outer surface of the cylinder body (403), and the inner walls of the plurality of connecting members (405) are all provided with connecting rods (203); A plurality of mounting holes (206) are respectively provided at one end of the plurality of connecting rods (203) close to the first connecting member (405), and the inner walls of the plurality of mounting holes (206) are each provided with two telescopic blocks (207); A plurality of elastic members (213) are respectively arranged on the outer surfaces of the plurality of telescopic blocks (207); a plurality of connecting rods (203) are provided with a circular plate (202) at one end close to the connecting member (405); the outer surfaces of the plurality of telescopic blocks (207) are respectively aligned with the outer surfaces of the two groups of connecting members (405); the outer surfaces of the plurality of telescopic blocks (207) are provided with a connecting block (212); the outer surfaces of the plurality of connecting blocks (212) are provided with a threaded rod (211); the outer surfaces of the plurality of threaded rods (211) are respectively arranged on the inner walls of the plurality of connecting rods (203); the other ends of the plurality of threaded rods (211) are provided with a circular block (208); the outer surfaces of the plurality of circular plates (202) are installed with a plurality of horizontal plates (210); the outer surfaces of the plurality of circular plates (202 ... Each of the plurality of elastic members (201) is provided with an elastic member (2), and a plurality of the elastic members (201) are provided with a reinforcing tube (2) at one opposite end. The inner walls of the plurality of reinforcing tubes (2) are respectively provided on the outer surfaces of the plurality of connecting rods (203). The inner walls of the plurality of connecting rods (203) are respectively provided with a plurality of limiting rods (205). The ends of the plurality of connecting rods (203) away from the circular plate (202) are respectively provided with a circular plate (204). The outer surfaces of the two groups of circular plates (204) are respectively provided with a through hole (209). The inner walls of the plurality of circular plates (204) are respectively provided on the outer surfaces of the plurality of limiting rods (205). The outer surfaces of the plurality of circular plates (204) are respectively provided on the inner walls of the plurality of reinforcing tubes (2). The outer surfaces of the plurality of connecting blocks (212) are respectively provided on the inner walls of the plurality of mounting holes (206).

2. The safest fluidized bed boiler return leg expansion joint according to claim 1, characterized in that: A connecting piece 2 (401) is provided at one end of the cylinder 1 (4) away from the metal bellows (402), and two fixing rings (406) are provided on the outside of the inner cylinder 1 (1), and the outer rings of the two fixing rings (406) are respectively provided on the inner wall of the cylinder 1 (4) and the inner wall of the cylinder 2 (403), and the outer surfaces of the two fixing rings (406) are provided with a tube body (407), and the outer surface of the tube body (407) is provided with a heat insulation ring (408).

3. The safer fluidized bed boiler return leg expansion joint according to claim 2, characterized in that: The outer surface of the heat-insulating ring (408) is arranged on the inner wall of cylinder one (4) and the inner wall of cylinder two (403), the inner ring of the tube body (407) is provided with inner cylinder two (409), the outer surface of the inner cylinder two (409) is arranged on the inner wall of multiple connecting parts two (401), the outer surface of the tube body (407) is provided with multiple connecting parts three (404), and the ends of the multiple connecting parts three (404) away from the tube body (407) are all provided with limit blocks (410).

4. The safer fluidized bed boiler return leg expansion joint according to claim 3, characterized in that: One end of the inner cylinder (1) is provided with a plurality of buffer grooves (101), the outer surfaces of the plurality of limit blocks (410) are respectively provided on the inner walls of the plurality of buffer grooves (101), the outer surface of the inner cylinder (409) is provided with a plurality of U-shaped blocks (3), the outer surfaces of the plurality of U-shaped blocks (3) are all provided with L-shaped handles (5), and the inner walls of the plurality of U-shaped blocks (3) are all provided with connecting frames (6).

5. The return leg expansion joint of a fluidized bed boiler with higher safety according to claim 4, characterized in that: The outer surfaces of the plurality of connecting frames (6) are respectively arranged on the outer surface of the L-shaped handle (5), the outer surfaces of the plurality of connecting frames (6) are all provided with clamping plates (7), the outer surfaces of the plurality of clamping plates (7) are respectively in contact with the outer surfaces of the plurality of U-shaped blocks (3), the outer surfaces of the plurality of clamping plates (7) are in contact with the outer surface of the second inner cylinder (409), and the outer surfaces of the plurality of clamping plates (7) are all provided with elastic parts three (8).

6. The highly secure fluidized bed boiler return leg expansion joint according to claim 5, characterized in that: The other ends of the plurality of elastic members (8) are respectively arranged on the outer surface of the U-shaped block (3), the ends of the plurality of connecting frames (6) away from the clamping plate (7) are each provided with a connecting plate (601), the other ends of the plurality of connecting plates (601) are each provided with a plurality of linkage plates (9), the other ends of the plurality of groups of linkage plates (9) are each provided with a handle (10), and the other ends of the plurality of handles (10) are respectively arranged on the outer surface of the plurality of L-shaped handles (5).

7. The return leg expansion joint for a fluidized bed boiler with higher safety according to claim 6, characterized in that: The outer surfaces of the plurality of U-shaped blocks (3) are all provided with rectangular plates (301), the sides of the plurality of rectangular plates (301) away from the U-shaped blocks (3) are all provided with damping vibration absorbers (302), the other ends of the plurality of damping vibration absorbers (302) are all provided with rectangular plates (303), the outer surfaces of the plurality of rectangular plates (303) are all provided with elastic members (304), and the other ends of the plurality of elastic members (304) are respectively provided on the outer surfaces of the plurality of rectangular plates (301).

Images