Detachable expansion joint heat exchanger

Abstract

The utility model belongs to the field of shell-and-tube heat exchangers, and relates to a detachable expansion joint heat exchanger which comprises a barrel, two ends of the barrel are respectively connected with a left tube box and a right tube box, a tube pass inlet is arranged on the left tube box, a tube pass outlet is arranged on the right tube box, a fixed tube plate is arranged in the left tube box, and a plurality of heat exchange tubes are connected onto the fixed tube plate. The other ends of the heat exchange tubes are connected with the same floating tube plate, the other end face of the floating tube plate is connected with a conical shell, the conical shell is connected with an expansion assembly, the expansion assembly is fixedly connected with the right end of the barrel, and the barrel is provided with a shell pass inlet and a shell pass outlet. According to the detachable expansion joint, the flange is connected with equipment through the bolt, replacement can be carried out under the condition that the equipment is not damaged, through the detachable design, when the expansion joint is damaged, a new expansion joint can be conveniently maintained and replaced, and the expansion joint can be put into use again only by replacing the new expansion joint.

Description

Technical Field

[0001] The utility model belongs to the field of shell and tube heat exchangers and relates to a detachable expansion joint heat exchanger. Background Art

[0002] Heat exchangers are heat exchange equipment widely used in chemical, petroleum, metallurgy, light industry and other industries. Their main purpose is to transfer heat from one fluid to another through conduction, convection and radiation. In a heat exchanger, due to changes in the medium temperature, the pipes and equipment inside the heat exchanger will expand and contract. At this time, expansion joints need to be installed. The expansion joints can absorb the thermal expansion and contraction of the heat exchanger system through their own expansion and contraction, thereby preventing the system from being destroyed or damaged.

[0003] The Chinese invention patent with the existing publication number CN105091634A, a baffled rod heat exchanger with built-in expansion joint comprises a tube box assembly, a shell assembly, a tube bundle assembly and an expansion joint assembly; the tube box assembly comprises a tube box head, a tube box barrel and a tube box flange; the tube bundle assembly comprises a tube bundle, a left tube sheet and a right tube sheet at both ends of the tube bundle, and the tube bundle assembly also comprises a short joint and a conical head; the expansion joint assembly comprises an expansion joint and a flange ring; the shell assembly comprises a shell side barrel, a shell side head and a reinforcement tube; the above-mentioned tube bundle assembly is located inside the shell side barrel, and the above-mentioned reinforcement tube extends from the inside of the shell side head to the outside of the shell side head; the above-mentioned shell side barrel is installed with a barrel flange near one end of the tube box, and the barrel flange and the tube box flange of the above-mentioned tube box assembly clamp the left tube sheet; the right tube sheet is a floating structure, which is connected to the large end of the conical head through a short joint; the small end of the conical head is connected to the expansion joint, and the end of the expansion joint is a flange ring, which is sealed and connected to the end of the reinforcement tube of the shell assembly.

[0004] The prior art has the following technical defects:

[0005] Generally, the expansion joint is connected to the heat exchanger by welding, but it cannot be replaced after being damaged. In the above technical solution, the expansion joint is fixed on the conical head and is designed as an integral part of the conical head. When the expansion joint is damaged, it is still inconvenient to repair. Not only does it need to replace the expansion joint, but it also needs to disassemble the conical head for repair. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a detachable expansion joint heat exchanger.

[0007] The detachable expansion joint heat exchanger described in the utility model comprises a cylinder, and the two ends of the cylinder are respectively connected to a left tube box and a right tube box, the left tube box is provided with a tube side inlet, and the right tube box is provided with a tube side outlet, a fixed tube sheet is provided in the left tube box, a plurality of heat exchange tubes are connected to the fixed tube sheet, the other end of each heat exchange tube is connected to the same floating tube sheet, the other end face of the floating tube sheet is connected to a cone shell, an expansion assembly is connected to the cone shell, the expansion assembly is fixedly connected to the right end of the cylinder, and a shell side inlet and a shell side outlet are provided on the cylinder; the expansion assembly comprises an expansion joint, a reverse flange II and a wide face flange are provided on the expansion joint, a reverse flange I corresponding to the reverse flange II is provided at the rear end of the cone shell, and a shell flange corresponding to the wide face flange is provided on the cylinder.

[0008] Working process or working principle:

[0009] When in use, the shell-side fluid flows into the cylinder through the shell-side inlet and then flows out through the shell-side outlet. The tube-side fluid flows into the left tube box through the tube-side inlet, then flows to the cone shell and the expansion joint through the heat exchange tubes, and flows out through the tube-side fluid outlet. When the expansion joint needs to be repaired or replaced, the expansion joint, the cylinder and the cone shell can be separated by bolts, and the same applies during installation.

[0010] The expansion joint is threadedly connected to the cone shell, and matching threads are provided on the cone shell and the expansion joint to replace the bolt connection of the flange, so that the assembly and disassembly are more convenient and quick.

[0011] A clamping jaw is hinged on the cone shell, and the tail end of the clamping jaw protrudes to the connection between the cone shell and the expansion joint. The jaw surface of the clamping jaw is provided with a rubber pad. When the expansion joint is screwed into the cone shell, as the expansion joint continues to extend into the cone shell, the tail end of the clamping jaw is squeezed to rotate, thereby driving the front end of the clamping jaw to move toward the expansion joint and clamp it.

[0012] A baffle is provided at the connection between the cone shell and the expansion joint. When the floating tube sheet moves, fluid will enter the connection between the expansion joint and the cone shell. Corrosion and the like may occur over a long period of time, resulting in an unstable connection. The baffle can reduce the entry of fluid and avoid damage to the connecting threads.

[0013] The right pipe box is provided with an upper right pipe box flange, and the shell flange and the right pipe box flange are fixedly connected by bolts.

[0014] A plurality of baffles are arranged in the cylinder, and through holes corresponding to the heat exchange tubes are arranged on the baffles.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model uses a flange connected to the equipment by bolts, and can be replaced without damaging the equipment. Through the detachable design, when the expansion joint is damaged, it can be conveniently repaired and replaced with a new expansion joint. It can be put into use again by only replacing the new expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the expansion joint connection of the second embodiment of the utility model.

[0019] In the figure: 1. tube side inlet; 2. left tube box; 3. fixed tube sheet; 4. shell side outlet; 5. cylinder; 6. heat exchange tube; 7. cone shell; 8. reverse flange I; 9. reverse flange II; 10. expansion joint; 11. shell flange; 12. right tube box flange; 13. tube side outlet; 14. right tube box; 15. wide face flange; 16. floating tube sheet; 17. shell side inlet; 18. baffle; 19. clamp; 20. baffle; 21. rubber pad. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1 As shown, the detachable expansion joint 10 heat exchanger described in the utility model comprises a cylinder 5, the two ends of the cylinder 5 are respectively connected to a left tube box 2 and a right tube box 14, the left tube box 2 is provided with a tube side inlet 1, the right tube box 14 is provided with a tube side outlet 13, a fixed tube sheet 3 is provided in the left tube box 2, a plurality of heat exchange tubes 6 are connected to the fixed tube sheet 3, the other end of each heat exchange tube 6 is connected to the same floating tube sheet 16, the other end surface of the floating tube sheet 16 is connected to a cone shell 7, the cone shell 7 is connected to an expansion assembly, the expansion assembly is fixedly connected to the right end of the cylinder 5, and the cylinder 5 is provided with a fixed tube sheet 3. A shell side inlet 17 and a shell side outlet 4 are provided; the expansion assembly includes an expansion joint 10, on which a reverse flange II 9 and a wide face flange 15 are provided; a reverse flange I8 corresponding to the reverse flange II 9 is provided at the rear end of the cone shell 7; a shell flange 11 corresponding to the wide face flange 15 is provided on the cylinder 5; an upper right tube box flange 12 is provided on the right tube box 14, and the shell flange 11 is fixedly connected to the right tube box flange 12 by bolts; a plurality of baffles 18 are provided in the cylinder 5, and through holes corresponding to the heat exchange tubes 6 are provided on the baffles 18.

[0022] Working process or working principle:

[0023] When in use, the shell-side fluid flows into the cylinder 5 through the shell-side inlet 17, and then flows out through the shell-side outlet 4. The tube-side fluid flows into the left tube box 2 through the tube-side inlet 1, and then flows to the cone shell 7 and the expansion joint 10 through the heat exchange tube 6, and flows out through the tube-side fluid outlet. When the expansion joint 10 needs to be repaired or replaced, the expansion joint 10, the cylinder 5 and the cone shell 7 can be separated by bolts, and the same applies during installation.

[0024] Example 2

[0025] like Figure 2 As shown, what is different from Example 1 is that the expansion joint 10 described in this embodiment is threadedly connected to the cone shell 7. By arranging matching threads on the cone shell 7 and the expansion joint 10 to replace the bolt connection of the flange, the loading and unloading is more convenient and quick; a clamping jaw 19 is hinged on the cone shell 7, and the tail end of the clamping jaw 19 protrudes to the connection between the cone shell 7 and the expansion joint 10. The claw surface of the clamping jaw 19 is provided with a rubber pad 21. When the expansion joint 10 is screwed into the cone shell 7, as the expansion joint 10 continues to extend into the cone shell 7, the tail end of the clamping jaw 19 is squeezed to rotate, thereby driving the front end of the clamping jaw 19 to move toward the expansion joint 10 and clamp; a baffle 20 is provided at the connection between the cone shell 7 and the expansion joint 10. When the floating tube sheet 16 is active, the fluid will enter the connection between the expansion joint 10 and the cone shell 7. Corrosion and the like may occur over a long period of time, resulting in an unstable connection. The baffle 20 can reduce the entry of fluid and avoid damage to the connecting thread.

[0026] The utility model uses a flange connected to the equipment by bolts, which can be replaced without damaging the equipment. Through the detachable design, when the expansion joint 10 is damaged, it can be easily repaired and replaced with a new expansion joint 10. It can be put into use again by simply replacing the new expansion joint 10.

[0027] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A detachable expansion joint heat exchanger, characterized in that: The invention comprises a cylinder (5), the two ends of which are respectively connected to a left tube box (2) and a right tube box (14), the left tube box (2) is provided with a tube side inlet (1), the right tube box (14) is provided with a tube side outlet (13), a fixed tube sheet (3) is provided in the left tube box (2), a plurality of heat exchange tubes (6) are connected to the fixed tube sheet (3), the other end of each heat exchange tube (6) is connected to the same floating tube sheet (16), the other end surface of the floating tube sheet (16) is connected to a cone shell (7), the cone shell (7) is connected to an expansion assembly, the expansion assembly is fixedly connected to the right end of the cylinder (5), and the cylinder (5) is provided with a shell side inlet (17) and a shell side outlet (4); The expansion assembly comprises an expansion joint (10), on which a reverse flange II (9) and a wide face flange (15) are provided, a reverse flange I (8) corresponding to the reverse flange II (9) is provided at the rear end of the cone shell (7), and a shell flange (11) corresponding to the wide face flange (15) is provided on the cylinder (5).

2. The detachable expansion joint heat exchanger according to claim 1, characterized in that: The expansion joint (10) is threadedly connected to the cone shell (7).

3. The detachable expansion joint heat exchanger according to claim 2 is characterized in that: A clamping claw (19) is hinged on the cone shell (7), the tail end of the clamping claw (19) protrudes to the connection between the cone shell (7) and the expansion joint (10), and a rubber pad (21) is provided on the claw surface of the clamping claw (19).

4. The detachable expansion joint heat exchanger according to claim 3 is characterized in that: A stopper (20) is provided at the connection between the cone shell (7) and the expansion joint (10).

5. The detachable expansion joint heat exchanger according to any one of claims 1 to 4, characterized in that: The right pipe box (14) is provided with an upper right pipe box flange (12), and the shell flange (11) and the right pipe box flange (12) are fixedly connected by bolts.

6. The detachable expansion joint heat exchanger according to claim 5, characterized in that: A plurality of baffles (18) are arranged in the cylinder (5), and the baffles (18) are provided with through holes corresponding to the heat exchange tubes (6).

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