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 invention relates to the technical field of heat exchangers, in particular to a stable connecting piece for fixing pipe parts of a shell-and-tube heat exchanger. Background Art

[0002] Heat exchangers are also called heat exchangers or heat exchange equipment. Heat exchangers are used to transfer heat from hot fluid to cold fluid.

[0003] The patent with patent announcement number CN212567023U relates to a stable connector for fixing the pipe fittings of a shell and tube heat exchanger, including a heat exchanger pipe fitting and a first connecting clamp plate arranged on one side of the outer surface of the heat exchanger pipe fitting, and a second connecting clamp plate arranged on the other side of the outer surface of the heat exchanger pipe fitting, a mounting screw is arranged below one side of the outer surface of the first connecting clamp plate, a clamping rod is arranged between the first connecting clamp plate and the second connecting clamp plate, a clamping ring is arranged between the two groups of the clamping rods, and mounting rings are welded at the positions corresponding to the mounting screws below both sides of the outer surface of the heat exchanger pipe fitting. The stable connector for fixing the pipe fittings of the shell and tube heat exchanger described in the patent can facilitate users to adjust the use form of the connector according to the usage conditions and the diameter of the pipe fitting. It not only has a wide range of use but also can effectively ensure the stability of the connection between the heat exchanger pipe fittings, bringing better usage prospects.

[0004] In the above patent, it is convenient for users to adjust the use form of the connector according to the usage conditions and the diameter of the pipe. Not only is the scope of use wide, but it can also effectively ensure the stability of the connection between the heat exchanger pipes, bringing better usage prospects. However, long-term use may cause the bolts to loosen, and the loosening may cause unstable fixation between the clamps, affecting the stability of the equipment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a stable connector for fixing pipe members of a shell-and-tube heat exchanger, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a stable connector for fixing a pipe member of a shell and tube heat exchanger, comprising: a card plate, a nut is fixedly installed on the surface of the card plate, a bolt is rotatably penetrated on the surface of the card plate, the nut is threadedly installed on the surface of the bolt, and a pipe body is arranged between the card plates; a stabilizing device, the stabilizing device is arranged on the surface of the card plate, the stabilizing device comprises a circular ring, a fixed plate, an elastic telescopic plate, a triangular block, a fixed rod, a triangular plate and a sliding ring, by rotating the bolt, the rotation of the bolt will drive the card plate to move in the direction close to the pipe body, the circular ring is fixedly installed on the side of the card plate away from the pipe body, the fixed 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 on the free end of the elastic telescopic plate, the fixed rod is fixedly installed on the free end of the elastic telescopic plate, the triangular plate is fixedly installed on the side of the fixed 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 fixed plate to rotate, the rotation of the fixed plate will contact the triangular block, and the rotation of the fixed plate will cause the elastic telescopic plate to drive the triangular block to shrink toward 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 No. 1 spring is arranged between the sliding ring and the circular ring, and the No. 1 spring drives the sliding ring to reset.

[0008] According to the above technical solution, a clamping device for clamping the pipe body is arranged inside the card plate, a protective 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, the sliding block is driven to move in a direction close to the pipe body by the card plate moving in a direction close to the pipe body, the sliding block is driven to move in a direction close to the pipe body by the sliding block moving in a direction close to the pipe body, a sliding groove is provided on the surface of the card plate, the sliding block is slidably installed on the inner wall of the sliding groove, the elastic telescopic rod is fixedly installed on a side of the sliding block close to the pipe body, and the arc-shaped clamping plate is fixedly installed on 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 pipe body, and a push block is fixedly installed on the side of the connecting rod away from the arc-shaped clamping plate. A sliding seat is slidably installed on 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 push block toward the direction close to the pulley will push the pulley and the sliding seat to move toward the inner wall of the slide groove, and the movement of the sliding seat toward the direction close to the slide groove will drive the gasket to move toward the direction close to the slide groove, and the sliding block is limited by the gasket moving toward the direction close to the slide groove.

[0010] According to the above technical solution, the push block contacts the surface of the pulley, and a No. 2 spring is arranged between the sliding seat and the sliding block, and the No. 2 spring drives the sliding seat to reset.

[0011] According to the above technical solution, the protection device includes a sliding groove, a slider, a curved plate, a sliding plate and a square plate. The sliding groove is driven to move in the direction close to the card plate by the curved clamping plate moving in the direction close to the card plate. The movement of the sliding groove in the direction close to the card plate will drive the slider to move in the direction close to the card plate. The sliding groove is fixedly installed at the bottom of the curved clamping plate, the slider is slidably installed on the inner wall of the sliding groove, the curved plate is fixedly installed at the bottom of the slider, a groove is opened on the surface of the curved plate, the sliding plate slides on the inner wall of the groove, and the square plate is fixedly installed on the surface of the sliding plate.

[0012] According to the above technical solution, a slide plate is slidably installed at the bottom of the arc-shaped plate, a arc-shaped slide plate is fixedly installed on the surface of the slide plate, and an elastic telescopic block is fixedly installed on the surface of the arc-shaped slide plate. The movement of the arc-shaped slide plate in the direction away from the pipe body will drive the elastic telescopic block to move in the direction away from the pipe body, and the movement of the elastic telescopic block in the direction away from the pipe body will limit the square plate.

[0013] According to the above technical solution, a No. 3 spring is arranged between the sliding groove and the slider, and the slider is driven to reset by the No. 3 spring. A No. 4 spring is arranged between the sliding plate and the groove, and the sliding plate is driven to reset by the No. 4 spring. A No. 5 spring is arranged between the arc plate and the slide plate, and the slide plate is driven to reset by the No. 5 spring.

[0014] The present invention provides a stable connector for fixing pipe parts of a shell-and-tube heat exchanger.

[0015] Beneficial effects:

[0016] (1) In the present invention, by rotating the bolt, the rotation of the bolt will drive the clamping plate to move toward the direction of the pipe body. The two clamping plates move toward each other to fix the pipe body, thereby improving stability during use. At the same time, the triangular block will limit the fixing plate to prevent the bolt from loosening due to long-term use, thereby affecting the fixation of the pipe body. The movement of the fixing rod in the direction away from the ring will drive the free end of the elastic telescopic plate to contract. The contraction of the free end of the elastic telescopic plate will drive the contraction of the triangular block. The contraction of the triangular block will release the limit on the bolt, thereby facilitating the disassembly of the clamping plate and improving the efficiency of pipeline maintenance and replacement.

[0017] (2) In the present invention, the sliding block moves toward the direction close to the pipe body, thereby driving the elastic telescopic rod to move toward the direction close to the pipe body. The movement of the elastic telescopic rod toward the direction close to the pipe body drives the arc-shaped clamping plate to clamp the pipe body, thereby improving the support for the pipe and preventing shaking or vibration from causing an unstable connection between the pipe body and the heat exchanger, thereby affecting the normal use of the equipment. At the same time, the gasket moves toward the direction close to the slide groove to limit the sliding block, thereby preventing the sliding block from moving during clamping, thereby causing the clamping position to shift and affecting the stability of the clamping.

[0018] (3) In the present invention, the square plate moves toward the card plate and contacts the card plate, which pushes the square plate and the sliding plate to move away from the slide groove. The square plate pushes the arc plate to wrap the pipe body, thereby improving the protection and stability of the pipe body. At the same time, the elastic telescopic block moves away from the pipe body to limit the square plate, thereby preventing the square plate from resetting and causing the arc plate to fail to effectively wrap the pipe body, thereby reducing the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the surface structure of the card board of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the stabilizing device of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the clamping device of the present invention;

[0023] Figure 5 This is a schematic diagram of the bottom structure of the arc-shaped splint of the present invention;

[0024] Figure 6 It is a schematic diagram of the surface structure of the curved plate of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A.

[0026] In the figure: 1, clamping plate; 2, nut; 3, bolt; 4, pipe body; 5, circular ring; 6, fixed plate; 7, elastic telescopic plate; 8, triangular block; 9, fixed rod; 10, triangular plate; 11, sliding ring; 121, sliding block; 122, elastic telescopic rod; 123, arc-shaped clamping plate; 124, connecting rod; 125, push block; 126, sliding seat; 127, pulley; 128, gasket; 131, sliding groove; 132, slider; 133, arc-shaped plate; 134, sliding plate; 135, square plate; 136, slide plate; 137, arc-shaped slide plate; 138, elastic telescopic block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7 One embodiment of the present invention is: a stable connector for fixing a pipe member of a shell-and-tube heat exchanger, comprising: a card plate 1, a nut 2 is fixedly installed on the surface of the card plate 1, a bolt 3 is rotatably penetrated on the surface of the card plate 1, the nut 2 is threadedly installed on the surface of the bolt 3, and a pipe body 4 is arranged between the card plates 1; a stabilizing device, the stabilizing device is arranged on the surface of the card plate 1, and the stabilizing device includes a 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. The two card plates 1 move toward each other to fix the pipe body 4, thereby improving the stability during use. To ensure stability, the ring 5 is fixedly mounted on the side of the clamping plate 1 away from the pipe body 4, the fixing plate 6 is fixedly mounted on the side of the bolt 3 close to the ring 5, the elastic telescopic plate 7 is fixedly mounted on the inner wall of the ring 5, the triangular block 8 is fixedly mounted on the free end of the elastic telescopic plate 7, the fixing rod 9 is fixedly mounted on the free end of the elastic telescopic plate 7, the triangular plate 10 is fixedly mounted on the side of the fixing rod 9 close to the ring 5, and the sliding ring 11 is slidably mounted on the circumferential surface of the ring 5. The fixing plate 6 is limited by the triangular block 8 to prevent the bolt 3 from loosening due to long-term use, thereby affecting the fixation of the pipe body 4.

[0029] The triangular plate 10 is in surface contact with the sliding ring 11. A spring No. 1 is arranged between the sliding ring 11 and the circular ring 5, and the sliding ring 11 is driven to reset by the spring No. 1.

[0030] When the present embodiment is working, by rotating the bolt 3, the rotation of the bolt 3 will drive the clamping plate 1 to move in the direction close to the pipe body 4. The two clamping plates 1 move toward each other to fix the pipe body 4, thereby improving the stability during use. At the same time, the rotation of the bolt 3 will drive the fixing plate 6 to rotate. The fixing plate 6 will contact the triangular block 8 when it rotates. The fixing plate 6 will cause the elastic expansion plate 7 to drive the triangular block 8 to shrink toward the fixed end of the elastic expansion plate 7. When the clamping plate 1 fixes the pipe body 4, the triangular block 8 will limit the fixing plate 6 to prevent the bolt 3 from loosening due to long-term use, thereby affecting the fixation of the pipe body 4. At the same time, when disassembly is required, by pushing the sliding ring 11 to move towards the card plate 1, the sliding ring 11 moving towards the card plate 1 will push the triangular plate 10 to move away from the circular ring 5, and the triangular plate 10 moving away from the circular ring 5 will drive the fixing rod 9 to move away from the circular ring 5. The movement of the fixing rod 9 away from the circular ring 5 will drive the free end of the elastic telescopic plate 7 to contract, and the contraction of the free end of the elastic telescopic plate 7 will drive the triangular block 8 to contract. The contraction of the triangular block 8 will release the limit on the bolt 3, making it convenient to disassemble the card plate 1 and improving the efficiency of pipeline maintenance and replacement.

[0031] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, a clamping device for clamping the pipe body 4 is arranged inside the card plate 1, and a protective 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 slide groove is opened on the surface of the card plate 1, and the sliding block 121 is slidably installed on the inner wall of the slide groove. The elastic telescopic rod 122 is fixedly installed on a side of the sliding block 121 close to the pipe body 4, and the arc-shaped clamping plate 123 is fixedly installed at the free end of the elastic telescopic rod 122 to prevent shaking or vibration from causing unstable connection between the pipe body 4 and the heat exchanger, affecting the normal use of the equipment. At the same time, the clamping position of the arc-shaped clamping plate 123 can be adjusted by moving the sliding block 121 before use to ensure that the clamping position is at the pipe connection.

[0032] A connecting rod 124 is fixedly installed on the side of the arc-shaped clamping plate 123 away from the pipe body 4, a pushing 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 on 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 to prevent the sliding block 121 from moving during clamping, causing the clamping position to shift and affecting the stability of the clamping.

[0033] 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 , and the No. 2 spring drives the sliding seat 126 to reset.

[0034] The protective device includes a sliding groove 131, a slider 132, an arc plate 133, a sliding plate 134 and a square plate 135. The sliding groove 131 is fixedly installed at the bottom of the arc clamping plate 123, the slider 132 is slidably installed on the inner wall of the sliding groove 131, the arc plate 133 is fixedly installed at the bottom of the slider 132, a groove is opened on the surface of the arc plate 133, the sliding plate 134 slides on the inner wall of the groove, and the square plate 135 is fixedly installed on the surface of the sliding plate 134. The square plate 135 pushes the arc plate 133 to wrap the pipe body 4, thereby improving the protection and stabilization effect of the pipe body 4.

[0035] A slide plate 136 is slidably installed at the bottom of the arc plate 133, an arc plate 137 is fixedly installed on the surface of the slide plate 136, and an elastic telescopic block 138 is fixedly installed on the surface of the arc plate 137 to prevent the square plate 135 from resetting, causing the arc plate 133 to be unable to effectively wrap the pipe body 4, resulting in reduced protection effect.

[0036] A No. 3 spring is arranged between the sliding groove 131 and the slider 132, and the slider 132 is reset by the No. 3 spring. A No. 4 spring is arranged between the sliding plate 134 and the groove, and the sliding plate 134 is reset by the No. 4 spring. A No. 5 spring is arranged between the arc plate 133 and the slide plate 136, and the slide plate 136 is reset by the No. 5 spring.

[0037] When the present embodiment is working, the sliding block 121 is driven to move toward the direction close to the pipeline body 4 by the movement of the clamping plate 1 toward the pipeline body 4, and the sliding block 121 is driven to move toward the direction close to the pipeline body 4 to drive the elastic telescopic rod 122 to move toward the direction close to the pipeline body 4, and the movement of the elastic telescopic rod 122 toward the direction close to the pipeline body 4 will drive the arc clamping plate 123 to clamp the pipeline body 4, thereby improving the support for the pipeline, preventing shaking or vibration from causing unstable connection between the pipeline body 4 and the heat exchanger, and affecting the normal use of the equipment. At the same time, before use, the clamping position of the arc clamping plate 123 can be adjusted by moving the sliding block 121 to ensure that the clamping position is at the pipeline connection, thereby improving the clamping of the pipeline body 4, and at the same time, the arc clamping plate 123 will make the elastic telescopic rod 122 move toward the direction close to the pipeline body 4. The contraction of the retractable rod 122 and the contraction of the elastic telescopic rod 122 will drive the arc splint 123 to contract. The contraction of the arc splint 123 will drive the connecting rod 124 to move in the direction close to the sliding block 121. The movement of the connecting rod 124 in the direction close to the sliding block 121 will drive the pushing block 125 to move in the direction close to the pulley 127. The movement of the pushing block 125 in the direction close to the pulley 127 will push the pulley 127 and the sliding seat 126 to move in the direction close to the inner wall of the slide groove. The movement of the sliding seat 126 in the direction close to the slide groove will drive the gasket 128 to move in the direction close to the slide groove. The sliding block 121 is limited by the movement of the gasket 128 in the direction close to the slide groove, so as to prevent the sliding block 121 from moving during clamping, resulting in the displacement of the clamping position, which affects the stability of the clamping.

[0038] The arc-shaped clamping plate 123 moves toward the direction close to the card board 1, driving the sliding groove 131 to move toward the direction close to the card board 1. The sliding groove 131 moves toward the direction close to the card board 1, driving the slider 132 to move toward the direction close to the card board 1. The slider 132 moves toward the direction close to the card board 1, driving the arc-shaped plate 133 to move toward the direction close to the card board 1. The arc-shaped plate 133 moves toward the direction close to the card board 1, driving the square plate 135 to move toward the direction close to the card board 1, and the square plate 135 moves toward the direction close to the card board 1 and contacts the card board 1. The card board 1 pushes the square plate 135 and the sliding plate 134 to move away from the sliding groove. The square plate 135 pushes the arc-shaped plate 133 to wrap the pipe body 4, thereby improving the protection and stability of the pipe body 4. At the same time, the movement of the arc plate 133 towards the direction close to the pipe body 4 will drive the slide plate 136 to move towards the direction close to the pipe body 4. The slide plate 136 moves towards the direction close to the pipe body 4 and is affected by the interaction force of the pipe body 4 to move away from the pipe body 4. The movement of the slide plate 136 away from the pipe body 4 will drive the arc slide plate 137 to move away from the pipe body 4. The movement of the arc slide plate 137 away from the pipe body 4 will drive 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 will limit the square plate 135 to prevent the square plate 135 from resetting, resulting in the arc plate 133 being unable to effectively wrap the pipe body 4, thereby reducing the protection effect.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 arranged 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 pipe parts of a shell-and-tube heat exchanger according to claim 3, characterized in that: A connecting rod (124) is fixedly mounted on the side of the arc-shaped clamping plate (123) away from the pipe body (4), a pushing block (125) is fixedly mounted on the 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 the 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 arranged between the sliding groove (131) and the sliding block (132), a No. 4 spring is arranged between the sliding plate (134) and the groove, and a No. 5 spring is arranged between the arc plate (133) and the sliding plate (136).

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