Stable connecting piece for fixing pipe fitting of double-pipe heat exchanger

Abstract

The invention discloses a stable connecting piece for fixing a pipe piece of a double-pipe heat exchanger, and relates to the technical field of heat exchangers, the stable connecting piece comprises clamping plates, nuts are fixedly mounted on the surfaces of the clamping plates, bolts rotatably penetrate through the surfaces of the clamping plates, the nuts are mounted on the surfaces of the bolts in a threaded manner, and a pipe body is arranged between the clamping plates; the stabilizing device is arranged on the surface of the clamping plate and comprises a circular ring, a fixing plate, an elastic telescopic plate, a triangular block, a fixing rod, a triangular plate and a sliding ring, the bolt rotates to drive the clamping plate to move in the direction close to the pipeline body by rotating the bolt, and the circular ring is fixedly installed on the face, away from the pipeline body, of the clamping plate; the fixing plate is fixedly installed on the face, close to the circular ring, of the bolt, the elastic telescopic plate is fixedly installed on the inner wall of the circular ring, the fixing plate can be limited through a triangular block, and the situation that the bolt is loosened due to long-time use, and fixing of the pipeline body is affected is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a stable connecting piece for fixing pipeline components of a shell-and-tube heat exchanger. Background Art

[0002] A heat exchanger can also be referred to as a heat transfer exchanger or a heat transfer device. A heat exchanger is used to transfer heat from a hot fluid to a cold fluid.

[0003] The patent with the patent publication number CN212567023U relates to a stable connecting piece for fixing pipeline components of a shell-and-tube heat exchanger, including a heat exchanger pipe fitting and a first connecting card plate arranged on one side of the outer surface of the heat exchanger pipe fitting, and a second connecting card plate arranged on the other side of the outer surface of the heat exchanger pipe fitting. An installation screw is arranged below one side of the outer surface of the first connecting card plate. A clamping rod is arranged between the first connecting card plate and the second connecting card plate. A snap ring is arranged between the two groups of clamping rods. Installation sleeve rings are welded at positions corresponding to the installation screws below both sides of the outer surface of the heat exchanger pipe fitting. The stable connecting piece for fixing pipeline components of a shell-and-tube heat exchanger described in this patent can facilitate users to adjust the usage form of the connecting piece according to the usage situation and the diameter of the pipe fitting. It not only has a relatively wide range of use but also can effectively ensure the stability of the connection between the heat exchanger pipe fittings and brings a better usage prospect.

[0004] In the above patent, it can facilitate users to adjust the usage form of the connecting piece according to the usage situation and the diameter of the pipe fitting. It not only has a relatively wide range of use but also can effectively ensure the stability of the connection between the heat exchanger pipe fittings and brings a better usage prospect. However, long-term use may cause the bolts to loosen, and the loosening may cause the fixing between the card plates to be unstable, affecting the stability of the equipment. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a stable connecting piece for fixing pipeline components of a shell-and-tube heat exchanger, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A stable connecting piece for fixing the pipeline parts of a shell-and-tube heat exchanger, comprising: a clamping plate, on the surface of which a nut is fixedly installed, a bolt rotatably penetrates through the surface of the clamping plate, the nut is threadedly installed on the surface of the bolt, and a pipeline body is arranged between the clamping plates; a stabilizing device, which is arranged on the surface of the clamping plate, the stabilizing device includes a circular ring, a fixing plate, an elastic telescopic plate, a triangular block, a fixing rod, a triangular plate and a sliding ring. By rotating the bolt, the rotation of the bolt will drive the clamping plate to move towards the pipeline body. The circular ring is fixedly installed on the side of the clamping plate away from the pipeline body, the fixing plate is fixedly installed on the side of the bolt close to the circular ring, the elastic telescopic plate is fixedly installed on the inner wall of the circular ring, the triangular block is fixedly installed at the free end of the elastic telescopic plate, the fixing rod is fixedly installed at the free end of the elastic telescopic plate, the triangular plate is fixedly installed on the side of the fixing rod close to the circular ring, and the sliding ring is slidably installed on the circumferential surface of the circular ring. The rotation of the bolt will drive the fixing plate to rotate, the rotation of the fixing plate will contact the triangular block, and the rotation of the fixing plate will cause the elastic telescopic plate to drive the triangular block to contract towards the fixed end of the elastic telescopic plate.

[0007] According to the above technical solution, the triangular plate contacts the surface of the sliding ring, and a first spring is arranged between the sliding ring and the circular ring to drive the sliding ring to reset through the first spring.

[0008] According to the above technical solution, a clamping device for clamping the pipeline body is arranged inside the clamping plate, and a protection device is arranged at the bottom of the clamping device. The clamping device includes a sliding block, an elastic telescopic rod and an arc-shaped clamping plate. By the movement of the clamping plate towards the pipeline body, it drives the sliding block to move towards the pipeline body, and the movement of the sliding block towards the pipeline body drives the elastic telescopic rod to move towards the pipeline body. A chute is opened on the surface of the clamping plate, and the sliding block is slidably installed on the inner wall of the chute. The elastic telescopic rod is fixedly installed on the side of the sliding block close to the pipeline body, and the arc-shaped clamping plate is fixedly installed at the free end of the elastic telescopic rod.

[0009] According to the above technical solution, a connecting rod is fixedly installed on the side of the arc-shaped clamping plate away from the pipeline body, a pushing block is fixedly installed on the side of the connecting rod away from the arc-shaped clamping plate, a sliding seat is slidably installed at the bottom of the sliding block, a pulley is rotatably installed on the inner wall of the sliding seat, and a gasket is fixedly installed on the side of the sliding seat away from the pulley. The movement of the pushing block towards the pulley will push the pulley and the sliding seat to move towards the inner wall of the chute, and the movement of the sliding seat towards the chute will drive the gasket to move towards the chute. By the movement of the gasket towards the chute, the sliding block is limited.

[0010] According to the above technical solution, the pushing block contacts the surface of the pulley, and a second spring is arranged between the sliding seat and the sliding block to drive the sliding seat to reset through the second spring.

[0011] According to the above technical solution, the protection device includes a sliding groove, a slider, an arc-shaped plate, a sliding plate and a square plate. When the arc-shaped clamping plate moves towards the clamping plate, it drives the sliding groove to move towards the clamping plate. When the sliding groove moves towards the clamping plate, it drives the slider to move towards the clamping plate. The sliding groove is fixedly installed at the bottom of the arc-shaped clamping plate. The slider is slidably installed on the inner wall of the sliding groove. The arc-shaped plate is fixedly installed at the bottom of the slider. A groove is formed on the surface of the arc-shaped plate. The sliding plate is slidably installed on the inner wall of the groove. The square plate is fixedly installed on the surface of the sliding plate.

[0012] According to the above technical solution, a sliding plate is slidably installed at the bottom of the arc-shaped plate. An arc-shaped sliding plate is fixedly installed on the surface of the sliding plate. An elastic telescopic block is fixedly installed on the surface of the arc-shaped sliding plate. When the arc-shaped sliding plate moves away from the pipe body, it drives the elastic telescopic block to move away from the pipe body. When the elastic telescopic block moves away from the pipe body, it limits the square plate.

[0013] According to the above technical solution, a third spring is arranged between the sliding groove and the slider. The slider is driven to reset by the third spring. A fourth spring is arranged between the sliding plate and the groove. The sliding plate is driven to reset by the fourth spring. A fifth spring is arranged between the arc-shaped plate and the sliding plate. The sliding plate is driven to reset by the fifth spring.

[0014] The present invention provides a stable connecting piece for fixing a pipe part of a shell-and-tube heat exchanger. It has the following beneficial effects: (1) In this invention, by rotating the bolt, the rotation of the bolt drives the clamping plate to move towards the pipe body. Through the opposite movement of the two clamping plates, the pipe body is fixed, improving the stability during use. At the same time, the triangular block limits the fixing plate to prevent the bolt from loosening after long-term use, which affects the fixing of the pipe body. When the fixing rod moves away from the ring, it drives the free end of the elastic telescopic plate to contract. The contraction of the free end of the elastic telescopic plate drives the triangular block to contract. By the contraction of the triangular block, the limit on the bolt is released, facilitating the disassembly of the clamping plate and improving the maintenance and replacement efficiency of the pipe.

[0015] (2) In this invention, when the sliding block moves towards the pipe body, it drives the elastic telescopic rod to move towards the pipe body. When the elastic telescopic rod moves towards the pipe body, it drives the arc-shaped clamping plate to clamp the pipe body, improving the support for the pipe and preventing the pipe body from being unstable in connection with the heat exchanger due to shaking or vibration, which affects the normal use of the equipment. At the same time, when the gasket moves towards the sliding groove, it limits the sliding block to prevent the sliding block from moving during clamping, resulting in an offset of the clamping position and affecting the clamping stability.

[0016] (3) In this invention, when the square plate moves towards the clamping plate, it will come into contact with the clamping plate. The clamping plate will push the square plate and the sliding plate to move away from the sliding groove. The square plate will push the arc-shaped plate to wrap the pipe body, improving the protection and stability effect of the pipe body. At the same time, when the elastic telescopic block moves away from the pipe body, it will limit the square plate to prevent the square plate from resetting, resulting in the arc-shaped plate being unable to effectively wrap the pipe body and reducing the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the surface structure of the clamping plate of the present invention; Figure 3 Schematic diagram of the structure of the stabilizing device of the present invention; Figure 4 Schematic diagram of the structure of the clamping device of the present invention; Figure 5 Schematic diagram of the bottom structure of the arc-shaped clamping plate of the present invention; Figure 6 Schematic diagram of the surface structure of the arc-shaped plate of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure of part A in the present invention.

[0018] In the figure: 1, clamping plate; 2, nut; 3, bolt; 4, pipe body; 5, ring; 6, fixing plate; 7, elastic telescopic plate; 8, triangular block; 9, fixing rod; 10, triangular plate; 11, sliding ring; 121, sliding block; 122, elastic telescopic rod; 123, arc-shaped clamping plate; 124, connecting rod; 125, pushing block; 126, sliding seat; 127, pulley; 128, gasket; 131, sliding groove; 132, slider; 133, arc-shaped plate; 134, sliding plate; 135, square plate; 136, sliding board; 137, arc-shaped sliding board; 138, elastic telescopic block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-7, an embodiment of the present invention is: a stable connecting piece for fixing a pipeline component of a shell-and-tube heat exchanger, comprising: a clamping plate 1, a nut 2 is fixedly installed on the surface of the clamping plate 1, a bolt 3 rotatably penetrates through the surface of the clamping plate 1, the nut 2 is threadedly installed on the surface of the bolt 3, and a pipeline body 4 is arranged between the clamping plates 1; a stabilizing device, the stabilizing device is arranged on the surface of the clamping plate 1, the stabilizing device includes a circular ring 5, a fixing plate 6, an elastic telescopic plate 7, a triangular block 8, a fixing rod 9, a triangular plate 10 and a sliding ring 11. By moving the two clamping plates 1 towards each other, the pipeline body 4 is fixed, and the stability during use is improved. The circular ring 5 is fixedly installed on the side of the clamping plate 1 away from the pipeline body 4, the fixing plate 6 is fixedly installed on the side of the bolt 3 close to the circular ring 5, the elastic telescopic plate 7 is fixedly installed on the inner wall of the circular ring 5, the triangular block 8 is fixedly installed at the free end of the elastic telescopic plate 7, the fixing rod 9 is fixedly installed at the free end of the elastic telescopic plate 7, the triangular plate 10 is fixedly installed on the side of the fixing rod 9 close to the circular ring 5, and the sliding ring 11 is slidably installed on the circumferential surface of the circular ring 5. The triangular block 8 limits the fixing plate 6 to prevent the bolt 3 from loosening after long-term use, which affects the fixing of the pipeline body 4.

[0021] The triangular plate 10 is in contact with the surface of the sliding ring 11, and a first spring is arranged between the sliding ring 11 and the circular ring 5. The first spring drives the sliding ring 11 to reset.

[0022] When this embodiment works, by rotating the bolt 3, the rotation of the bolt 3 drives the clamping plate 1 to move towards the direction close to the pipeline body 4. By moving the two clamping plates 1 towards each other, the pipeline body 4 is fixed, and the stability during use is improved. At the same time, the rotation of the bolt 3 drives the fixing plate 6 to rotate. The rotation of the fixing plate 6 contacts the triangular block 8. The rotation of the fixing plate 6 causes the elastic telescopic plate 7 to drive the triangular block 8 to contract towards the fixed end of the elastic telescopic plate 7. When the clamping plate 1 fixes the pipeline body 4, the triangular block 8 limits the fixing plate 6 to prevent the bolt 3 from loosening after long-term use, which affects the fixing of the pipeline body 4. At the same time, when disassembly is required, by pushing the sliding ring 11 towards the direction close to the clamping plate 1, the movement of the sliding ring 11 towards the direction close to the clamping plate 1 pushes the triangular plate 10 towards the direction away from the circular ring 5. The movement of the triangular plate 10 towards the direction away from the circular ring 5 drives the fixing rod 9 to move towards the direction away from the circular ring 5. The movement of the fixing rod 9 towards the direction away from the circular ring 5 drives the free end of the elastic telescopic plate 7 to contract. The contraction of the free end of the elastic telescopic plate 7 drives the triangular block 8 to contract. The contraction of the triangular block 8 releases the limit on the bolt 3, which facilitates the disassembly of the clamping plate 1 and improves the maintenance and replacement efficiency of the pipeline.

[0023] Please refer to Figures 1-7, on the basis of the above embodiments, in another embodiment of the present invention, a clamping device for clamping the pipeline body 4 is arranged inside the clamping plate 1, and a protection device is arranged at the bottom of the clamping device. The clamping device includes a sliding block 121, an elastic telescopic rod 122 and an arc-shaped clamping plate 123. A sliding groove is formed on the surface of the clamping plate 1, and the sliding block 121 is slidably installed on the inner wall of the sliding groove. The elastic telescopic rod 122 is fixedly installed on the side of the sliding block 121 close to the pipeline body 4, and the arc-shaped clamping plate 123 is fixedly installed at the free end of the elastic telescopic rod 122, preventing the pipeline body 4 from being unstablely connected to the heat exchanger due to shaking or vibration, affecting the normal use of the equipment. At the same time, before use, the position of the arc-shaped clamping plate 123 can be adjusted by moving the sliding block 121 to ensure that the clamping position is at the pipeline connection.

[0024] A connecting rod 124 is fixedly installed on the side of the arc-shaped clamping plate 123 away from the pipeline body 4, and a push block 125 is fixedly installed on the side of the connecting rod 124 away from the arc-shaped clamping plate 123. A sliding seat 126 is slidably installed at the bottom of the sliding block 121, a pulley 127 is rotatably installed on the inner wall of the sliding seat 126, and a gasket 128 is fixedly installed on the side of the sliding seat 126 away from the pulley 127, preventing the sliding block 121 from moving during clamping, resulting in the deviation of the clamping position and affecting the clamping stability.

[0025] The push block 125 is in contact with the surface of the pulley 127, and a second spring is arranged between the sliding seat 126 and the sliding block 121 to drive the sliding seat 126 to reset through the second spring.

[0026] The protection device includes a sliding groove 131, a slider 132, an arc-shaped plate 133, a sliding plate 134 and a square plate 135. The sliding groove 131 is fixedly installed at the bottom of the arc-shaped clamping plate 123, the slider 132 is slidably installed on the inner wall of the sliding groove 131, the arc-shaped plate 133 is fixedly installed at the bottom of the slider 132, a groove is formed on the surface of the arc-shaped plate 133, the sliding plate 134 is slidably installed on the inner wall of the groove, and the square plate 135 is fixedly installed on the surface of the sliding plate 134. The arc-shaped plate 133 is pushed by the square plate 135 to wrap the pipeline body 4, improving the protection and stability effect on the pipeline body 4.

[0027] A sliding plate 136 is slidably installed at the bottom of the arc-shaped plate 133, an arc-shaped sliding plate 137 is fixedly installed on the surface of the sliding plate 136, and an elastic telescopic block 138 is fixedly installed on the surface of the arc-shaped sliding plate 137, preventing the square plate 135 from resetting and causing the arc-shaped plate 133 to not effectively wrap the pipeline body 4, resulting in the reduction of the protection effect.

[0028] A third spring is provided between the sliding groove 131 and the slider 132, and the slider 132 is driven to reset by the third spring. A fourth spring is provided between the sliding plate 134 and the groove, and the sliding plate 134 is driven to reset by the fourth spring. A fifth spring is provided between the arc-shaped plate 133 and the sliding plate 136, and the sliding plate 136 is driven to reset by the fifth spring.

[0029] During the operation of this embodiment, the clamping plate 1 moves towards the pipeline body 4, driving the sliding block 121 to move towards the pipeline body 4. The sliding block 121 moving towards the pipeline body 4 drives the elastic telescopic rod 122 to move towards the pipeline body 4. The elastic telescopic rod 122 moving towards the pipeline body 4 drives the arc-shaped clamping plate 123 to clamp the pipeline body 4, improving the support for the pipeline and preventing the pipeline body 4 from being unstablely connected to the heat exchanger due to shaking or vibration, which affects the normal use of the equipment. At the same time, before use, the position of the arc-shaped clamping plate 123 can be adjusted by moving the sliding block 121 to ensure that the clamping position is at the pipeline connection, improving the clamping of the pipeline body 4. When the arc-shaped clamping plate 123 clamps, the elastic telescopic rod 122 will contract. The contraction of the elastic telescopic rod 122 drives the arc-shaped clamping plate 123 to contract. The contraction of the arc-shaped clamping plate 123 drives the connecting rod 124 to move towards the sliding block 121. The connecting rod 124 moving towards the sliding block 121 drives the push block 125 to move towards the pulley 127. The push block 125 moving towards the pulley 127 pushes the pulley 127 and the sliding seat 126 to move towards the inner wall of the chute. The sliding seat 126 moving towards the chute drives the gasket 128 to move towards the chute, and the gasket 128 moving towards the chute limits the sliding block 121 to prevent the sliding block 121 from moving during clamping, resulting in an offset of the clamping position and affecting the clamping stability.

[0030] Moving the arc-shaped splint 123 towards the clamping plate 1 drives the sliding groove 131 to move towards the clamping plate 1. The movement of the sliding groove 131 towards the clamping plate 1 drives the slider 132 to move towards the clamping plate 1. The movement of the slider 132 towards the clamping plate 1 drives the arc-shaped plate 133 to move towards the clamping plate 1. The movement of the arc-shaped plate 133 towards the clamping plate 1 drives the square plate 135 to move towards the clamping plate 1. The movement of the square plate 135 towards the clamping plate 1 brings it into contact with the clamping plate 1, and the clamping plate 1 pushes the square plate 135 and the sliding plate 134 to move away from the chute. The square plate 135 pushes the arc-shaped plate 133 to wrap the pipe body 4, improving the protection and stability of the pipe body 4. At the same time, the movement of the arc-shaped plate 133 towards the pipe body 4 drives the sliding plate 136 to move towards the pipe body 4. The movement of the sliding plate 136 towards the pipe body 4 is affected by the interaction force of the pipe body 4 and moves away from the pipe body 4. The movement of the sliding plate 136 away from the pipe body 4 drives the arc-shaped sliding plate 137 to move away from the pipe body 4. The movement of the arc-shaped sliding plate 137 away from the pipe body 4 drives the elastic telescopic block 138 to move away from the pipe body 4. The movement of the elastic telescopic block 138 away from the pipe body 4 limits the square plate 135, preventing the square plate 135 from resetting and causing the arc-shaped plate 133 to be unable to effectively wrap the pipe body 4, resulting in a reduced protection effect.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stable connector for fixing pipe parts of a shell-and-tube heat exchanger, characterized in that: include: A clamping plate (1), a nut (2) being fixedly mounted on the surface of the clamping plate (1), a bolt (3) being rotatably penetrated through the surface of the clamping plate (1), the nut (2) being threadedly mounted on the surface of the bolt (3), and a pipe body (4) being arranged between the clamping plates (1); A stabilizing device, the stabilizing device is arranged on the surface of the card plate (1), the stabilizing device comprises a circular ring (5), a fixed plate (6), an elastic telescopic plate (7), a triangular block (8), a fixed rod (9), a triangular plate (10) and a sliding ring (11), the circular ring (5) is fixedly mounted on a side of the card plate (1) away from the pipeline body (4), the fixed plate (6) is fixedly mounted on a side of the bolt (3) close to the circular ring (5), the elastic telescopic plate (7) is fixedly mounted on the inner wall of the circular ring (5), the triangular block (8) is fixedly mounted on the free end of the elastic telescopic plate (7), the fixed rod (9) is fixedly mounted on the free end of the elastic telescopic plate (7), the triangular plate (10) is fixedly mounted on a side of the fixed rod (9) close to the circular ring (5), and the sliding ring (11) is slidably mounted on the circumferential surface of the circular ring (5); Wherein, a clamping device for clamping the pipeline body (4) is arranged inside the clamping plate (1), and a protective device is arranged at the bottom of the clamping device.

2. A stable connector for fixing a pipe member of a shell-and-tube heat exchanger according to claim 1, characterized in that: The triangular plate (10) is in surface contact with the sliding ring (11), and a No. 1 spring is provided between the sliding ring (11) and the circular ring (5).

3. A stable connector for fixing a pipe member of a shell-and-tube heat exchanger according to claim 2, characterized in that: The clamping device comprises a sliding block (121), an elastic telescopic rod (122) and an arc-shaped clamping plate (123); a sliding groove is provided on the surface of the clamping plate (1); the sliding block (121) is slidably mounted on the inner wall of the sliding groove; the elastic telescopic rod (122) is fixedly mounted on a side of the sliding block (121) close to the pipe body (4); and the arc-shaped clamping plate (123) is fixedly mounted on the free end of the elastic telescopic rod (122).

4. A stable connector for fixing a pipe member of a shell-and-tube heat exchanger according to claim 3, characterized in that: A connecting rod (124) is fixedly mounted on a side of the arc-shaped clamping plate (123) away from the pipe body (4); a push block (125) is fixedly mounted on a side of the connecting rod (124) away from the arc-shaped clamping plate (123); a sliding seat (126) is slidably mounted on the bottom of the sliding block (121); a pulley (127) is rotatably mounted on the inner wall of the sliding seat (126); and a gasket (128) is fixedly mounted on a side of the sliding seat (126) away from the pulley (127).

5. A stable connector for fixing pipe parts of a shell-and-tube heat exchanger according to claim 4, characterized in that: The push block (125) is in surface contact with the pulley (127), and a No. 2 spring is provided between the sliding seat (126) and the sliding block (121).

6. A stable connector for fixing pipe parts of a shell-and-tube heat exchanger according to claim 5, characterized in that: The protection device comprises a sliding groove (131), a slider (132), an arc-shaped plate (133), a sliding plate (134) and a square plate (135); the sliding groove (131) is fixedly mounted on the bottom of the arc-shaped clamping plate (123); the slider (132) is slidably mounted on the inner wall of the sliding groove (131); the arc-shaped plate (133) is fixedly mounted on the bottom of the slider (132); a groove is formed on the surface of the arc-shaped plate (133); the sliding plate (134) slides on the inner wall of the groove; and the square plate (135) is fixedly mounted on the surface of the sliding plate (134).

7. A stable connector for fixing pipe parts of a shell-and-tube heat exchanger according to claim 6, characterized in that: A slide plate (136) is slidably mounted on the bottom of the arc-shaped plate (133), an arc-shaped slide plate (137) is fixedly mounted on the surface of the slide plate (136), and an elastic telescopic block (138) is fixedly mounted on the surface of the arc-shaped slide plate (137).

8. A stable connector for fixing pipe parts of a shell-and-tube heat exchanger according to claim 7, characterized in that: A No. 3 spring is provided between the sliding groove (131) and the sliding block (132), a No. 4 spring is provided between the sliding plate (134) and the groove, and a No. 5 spring is provided between the arc plate (133) and the sliding plate (136).

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