Sealing structure of floating head heat exchanger

Abstract

The utility model discloses a floating head heat exchanger sealing structure which comprises a sealing assembly, the sealing assembly comprises a tube plate, a connecting cylinder, an annular sealing groove, a sealing ring, a connecting ring, a sealing groove, a sealing ring, a limiting cylinder, an L-shaped limiting groove and a limiting block, and the upper portion of the outer side wall of the tube plate is connected with the connecting cylinder in a sliding mode. Due to the fact that the two sealing rings are arranged between the connecting cylinder and the tube plate and the sealing rings are connected with the sealing grooves in an attached mode, the multi-sealing effect is achieved, the sealing performance is greatly improved, and leakage is effectively prevented. Through cooperation of an L-shaped limiting groove and a limiting block between a limiting cylinder and a tube plate and fixed connection of an insertion rod and an insertion hole, stable connection between a connecting cylinder and the tube plate is ensured, and the stability and reliability of the whole structure are enhanced; easy disassembly and assembly can be completed by pulling the pull button and rotating the limiting cylinder, operation is easy, convenient and rapid, maintenance cost and downtime are reduced, and production efficiency is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of floating head heat exchangers, in particular to a sealing structure of a floating head heat exchanger. Background technology:

[0002] The floating head heat exchanger is a special heat exchanger. Its main feature is that only one end of the tube sheet at both ends is fixed to the shell, and the other end can move freely relative to the shell. This movable part is called the floating head. The floating head consists of a floating tube sheet, a hook ring and a floating head end cover. The tube bundle can be pulled out of the shell. This design makes the thermal deformation of the tube bundle and the shell independent of each other and does not generate thermal stress. As a vital heat exchange equipment in the chemical, petroleum, pharmaceutical, food and other industries, the performance and stability of the floating head heat exchanger are directly related to the efficiency and safety of the production process.

[0003] Existing sealing structures often use flanges, bolts and gaskets for sealing and fixing. In the working environment of high pressure, high temperature or corrosive media, it is easy to cause the sealing performance to deteriorate or even leakage. In addition, the disassembly and installation process of the existing sealing structure is cumbersome, and the convenience of inspection and maintenance is low, which increases the maintenance cost and downtime, thereby reducing production efficiency. Therefore, a floating head heat exchanger sealing structure is proposed. Utility model content:

[0004] The utility model aims to provide a sealing structure of a floating head heat exchanger to solve one of the problems raised in the above background technology.

[0005] The utility model is implemented by the following technical scheme: a floating head heat exchanger sealing structure, including a sealing assembly, the sealing assembly includes a tube sheet, a connecting tube, an annular sealing groove, a sealing ring, a connecting ring, a sealing groove, a sealing ring, a limiting tube, an L-shaped limiting groove and a limiting block, the upper part of the outer wall of the tube sheet is slidably connected with the connecting tube, the upper part of the outer wall of the tube sheet is close to the inner side of the connecting tube, the inner side walls of the two annular sealing grooves are fixedly connected with sealing rings, and the outer side walls of the two sealing rings are respectively fitted and connected to the connecting tube The middle and lower parts of the inner wall of the connecting cylinder are welded with a connecting ring on the inner top, a sealing groove is provided on the lower surface of the connecting ring, a sealing ring is fixedly connected to the outer side of the upper surface of the tube sheet, the outer wall of the sealing ring is fittedly connected to the inner wall of the sealing groove, the lower part of the outer wall of the connecting cylinder is rotatably connected to a limiting cylinder, a plurality of L-shaped limiting grooves are provided around the inner wall at the bottom of the inner wall of the limiting cylinder, a plurality of limiting blocks are fixedly connected around the outer wall at the lower part of the outer wall of the tube sheet, and the outer wall of the limiting block is slidably connected to the inner wall of the L-shaped limiting groove.

[0006] As a further preferred embodiment of the present technical solution: connecting blocks are welded on both sides of the upper surface of the limiting cylinder, sliding holes are opened in the middle of the adjacent sides of the two connecting blocks, and the inner walls of the two sliding holes are slidably connected with plug rods, and plug holes are opened on both sides of the outer wall of the connecting cylinder near the upper part of the sealing ring, and the adjacent sides of the outer walls of the two plug rods are slidably connected to the inner walls of the two plug holes respectively.

[0007] As a further preferred embodiment of the present technical solution: a shell is welded to the outer side of the sliding hole on the side of the connecting block away from the connecting tube, a limiting ring is fixedly connected to the middle of the outer side wall of the insertion rod, the outer side wall of the limiting ring is slidably connected to the inner side wall of the shell, one end of the insertion rod away from the connecting tube and the center of the inner side wall of the shell away from the connecting tube, a spring is sleeved on the side of the outer side wall of the insertion rod away from the connecting tube, one end of the spring is fit-connected to the side of the limiting ring away from the connecting block, and one end of the spring is fit-connected to the outer side of the center of the inner side wall of the shell away from the connecting tube.

[0008] As a further preferred embodiment of the present technical solution: a sealing head is welded on the outer side of the upper surface of the connecting ring.

[0009] As a further preferred embodiment of the present technical solution: an annular limiting ring is welded on the top of the inner wall of the limiting cylinder, an annular limiting groove is opened on the outer wall of the connecting cylinder near the lower part of the socket, and the outer wall of the annular limiting ring is rotatably connected to the inner wall of the annular limiting groove.

[0010] As a further preferred embodiment of the technical solution: one end of the insertion rod away from the connecting tube is fixedly connected with a pull button.

[0011] As a further preferred embodiment of the present technical solution: the lower portion of the inner side wall of the limiting cylinder close to the outer side of the L-shaped limiting groove is slidably connected to the outer side wall of the tube sheet close to the outer side of the limiting block.

[0012] As a further preferred embodiment of the present technical solution: a plurality of tube holes are provided on the upper surface of the tube sheet.

[0013] Advantages of the utility model:

[0014] 1. The utility model realizes multiple sealing effects by arranging two sealing rings between the connecting tube and the tube sheet and the fitting connection between the sealing ring and the sealing groove, greatly improving the sealing performance and effectively preventing the occurrence of leakage.

[0015] 2. The utility model ensures a stable connection between the connecting tube and the tube sheet through the cooperation of the L-shaped limiting groove and the limiting block between the limiting tube and the tube sheet, and the fixed connection between the plug rod and the plug hole, thereby enhancing the stability and reliability of the overall structure.

[0016] 3. The utility model can be easily disassembled and assembled by pulling the pull button and rotating the limit cylinder. The operation is simple and quick, which reduces maintenance costs and downtime and improves production efficiency. Description of the drawings:

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall cutaway structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the connecting cylinder and the limiting cylinder of the utility model;

[0021] Figure 4 For the utility model Figure 2 Magnified view of area A.

[0022] In the figure: 1. sealing assembly; 11. tube sheet; 12. connecting cylinder; 13. annular sealing groove; 14. sealing ring; 15. connecting ring; 16. sealing groove; 17. sealing ring; 18. limiting cylinder; 19. L-shaped limiting groove; 20. limiting block; 21. connecting block; 22. sliding hole; 23. plug rod; 24. plug hole; 25. shell; 26. limiting ring; 27. spring; 28. head; 29. ​​annular limiting ring; 30. annular limiting groove; 31. pull button; 32. pipe hole. Specific implementation method:

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example

[0025] See also Figure 1-4The utility model provides a technical solution: a sealing structure of a floating head heat exchanger, comprising a sealing assembly 1, the sealing assembly 1 comprising a tube sheet 11, a connecting tube 12, an annular sealing groove 13, a sealing ring 14, a connecting ring 15, a sealing groove 16, a sealing ring 17, a limiting tube 18, an L-shaped limiting groove 19 and a limiting block 20, the upper part of the outer wall of the tube sheet 11 is slidably connected with the connecting tube 12, the upper part of the outer wall of the tube sheet 11 is provided with two annular sealing grooves 13 near the inner side of the connecting tube 12, the inner side walls of the two annular sealing grooves 13 are fixedly connected with sealing rings 14, the outer side walls of the two sealing rings 14 are respectively fitted and connected to the middle and lower parts of the inner side wall of the connecting tube 12, and the inner side of the connecting tube 12 A connecting ring 15 is welded on the top, and a sealing groove 16 is provided on the lower surface of the connecting ring 15. A sealing ring 17 is fixedly connected to the outer side of the upper surface of the tube sheet 11, and the outer wall of the sealing ring 17 is fitted and connected to the inner wall of the sealing groove 16. The lower part of the outer wall of the connecting cylinder 12 is rotatably connected to a limiting cylinder 18, and a plurality of L-shaped limiting grooves 19 are provided around the inner wall of the bottom of the inner wall of the limiting cylinder 18. A plurality of limiting blocks 20 are fixedly connected around the outer wall of the lower part of the outer wall of the tube sheet 11, and the outer wall of the limiting block 20 is slidably connected to the inner wall of the L-shaped limiting groove 19. The tube sheet 11 slides inside the connecting cylinder 12, thereby limiting the tube sheet 11 and preventing the tube sheet 11 from shaking inside the connecting cylinder 12.

[0026] In this embodiment, specifically: connecting blocks 21 are welded on both sides of the upper surface of the limiting cylinder 18, and sliding holes 22 are opened in the middle of the adjacent sides of the two connecting blocks 21, and the inner walls of the two sliding holes 22 are slidably connected with plug rods 23, and the outer walls of the connecting cylinder 12 are provided with plug holes 24 on both sides of the upper part close to the sealing ring 17, and the adjacent sides of the outer walls of the two plug rods 23 are respectively slidably connected to the inner walls of the two plug holes 24, and the plug rods 23 are inserted into the inside of the plug holes 24 on the connecting cylinder 12, so as to limit the limiting cylinder 18 and prevent the limiting cylinder 18 from rotating.

[0027] In this embodiment, specifically: a shell 25 is welded to the outer side of the sliding hole 22 on the side of the connecting block 21 away from the connecting tube 12, a limiting ring 26 is fixedly connected to the middle of the outer wall of the insertion rod 23, and the outer wall of the limiting ring 26 is slidably connected to the inner wall of the shell 25, one end of the insertion rod 23 away from the connecting tube 12 and the center of the inner wall of the shell 25 away from the connecting tube 12, and a spring 27 is sleeved on the side of the outer wall of the insertion rod 23 away from the connecting tube 12, one end of the spring 27 is fitted and connected to the side of the limiting ring 26 away from the connecting block 21, and one end of the spring 27 is fitted and connected to the outer side of the center of the inner wall of the shell 25 away from the connecting tube 12, and the limiting ring 26 slides inside the shell 25, thereby limiting the limiting ring 26, and the thrust applied to the limiting ring 26 by the spring 27 facilitates the resetting of the insertion rod 23.

[0028] In this embodiment, specifically: a sealing head 28 is welded to the outer side of the upper surface of the connecting ring 15 , and the floating head heat exchanger is sealed by the sealing head 28 .

[0029] In this embodiment, specifically: an annular limiting ring 29 is welded on the top of the inner wall of the limiting cylinder 18, and an annular limiting groove 30 is opened on the outer wall of the connecting cylinder 12 near the lower part of the socket 24. The outer wall of the annular limiting ring 29 is rotatably connected to the inner wall of the annular limiting groove 30. The annular limiting ring 29 is rotated inside the annular limiting groove 30, thereby limiting the annular limiting ring 29, thereby increasing the stability of the limiting cylinder 18 during the rotation process and preventing it from shaking or shifting.

[0030] In this embodiment, specifically: one end of the insertion rod 23 away from the connecting tube 12 is fixedly connected with a pull button 31, and the pull button 31 is used to facilitate pulling the insertion rod 23.

[0031] In this embodiment, specifically: the lower portion of the inner wall of the limiting cylinder 18 is slidably connected to the outer side of the outer wall of the tube sheet 11 near the outer side of the limiting block 20 near the L-shaped limiting groove 19, and the lower portion of the outer wall of the tube sheet 11 slides inside the limiting cylinder 18, thereby limiting the tube sheet 11, increasing the stability of the tube sheet 11, and preventing the tube sheet 11 from shaking.

[0032] In this embodiment, specifically: a plurality of tube holes 32 are opened on the upper surface of the tube plate 11, and the heat exchange tubes are conveniently fixed through the tube holes 32.

[0033] Working principle or structural principle, when in use, when installing, first, the connecting tube 12 is sleeved on the upper part of the outer wall of the tube sheet 11, and at the same time, the limiting block 20 slides vertically into the L-shaped limiting groove 19, so that the outer walls of the two sealing rings 14 are respectively fitted and connected to the middle and lower parts of the inner wall of the connecting tube 12 to achieve preliminary sealing. At this time, the outer wall of the sealing ring 17 will fit and connect to the inner wall of the sealing groove 16, further enhancing the sealing effect. Through three-way sealing, the sealing effect is improved to prevent leakage. Then, the limiting tube 18 is rotated to make the outer walls of multiple limiting blocks 20 slide laterally along the inner wall of the L-shaped limiting groove 19, thereby limiting the limiting tube 18, and then forming a gap between the limiting tube 18 and the tube sheet 11. The relatively fixed connection relationship ensures the stability of the sealing structure between the connecting tube 12 and the tube sheet 11. At the same time, in order to further enhance the connection stability between the connecting tube 12 and the tube sheet 11, under the elastic force of the spring 27, the two plug rods 23 will be respectively inserted into the corresponding sockets 24, thereby realizing a fixed connection between the connecting tube 12 and the limiting tube 18, preventing the limiting tube 18 from rotating. When disassembling, the two pull knobs 31 are pulled outward to drive the two plug rods 23 to slide out of the sockets 24 on the connecting tube 12, release the limit on the limiting tube 18, and rotate the limiting tube 18 to release the limit block 20 on the limiting tube 18, thereby removing the connecting tube 12 sleeved on the tube sheet 11 to complete the disassembly.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure of a floating head heat exchanger, characterized in that: include A sealing assembly (1), the sealing assembly (1) comprising a tube sheet (11), a connecting tube (12), an annular sealing groove (13), a sealing ring (14), a connecting ring (15), a sealing groove (16), a sealing ring (17), a limiting tube (18), an L-shaped limiting groove (19) and a limiting block (20), the upper portion of the outer wall of the tube sheet (11) being slidably connected to the connecting tube (12), the upper portion of the outer wall of the tube sheet (11) being close to the inner side of the connecting tube (12) being provided with two annular sealing grooves (13), the inner walls of the two annular sealing grooves (13) being fixedly connected to the sealing rings (14), the outer walls of the two sealing rings (14) being respectively fitted and connected to the middle portion of the inner wall of the connecting tube (12) and a lower part, a connecting ring (15) is welded to the inner top of the connecting tube (12), a sealing groove (16) is provided on the lower surface of the connecting ring (15), a sealing ring (17) is fixedly connected to the outer side of the upper surface of the tube sheet (11), the outer wall of the sealing ring (17) is fittedly connected to the inner wall of the sealing groove (16), the lower part of the outer wall of the connecting tube (12) is rotatably connected to a limiting tube (18), the bottom of the inner wall of the limiting tube (18) is provided with a plurality of L-shaped limiting grooves (19) around the inner wall, and the lower part of the outer wall of the tube sheet (11) is fixedly connected with a plurality of limiting blocks (20) around the outer wall, the outer wall of the limiting block (20) is slidably connected to the inner wall of the L-shaped limiting groove (19).

2. A floating head heat exchanger sealing structure according to claim 1, characterized in that: Connecting blocks (21) are welded on both sides of the upper surface of the limiting cylinder (18); sliding holes (22) are provided in the middle of the adjacent sides of the two connecting blocks (21); the inner walls of the two sliding holes (22) are slidably connected with plug rods (23); and plug holes (24) are provided on both sides of the outer wall of the connecting cylinder (12) near the upper part of the sealing ring (17); the adjacent sides of the outer walls of the two plug rods (23) are slidably connected to the inner walls of the two plug holes (24) respectively.

3. A floating head heat exchanger sealing structure according to claim 2, characterized in that: A shell (25) is welded to the outer side of the sliding hole (22) on the side of the connecting block (21) away from the connecting tube (12); a limiting ring (26) is fixedly connected to the middle of the outer side wall of the insert rod (23); the outer side wall of the limiting ring (26) is slidably connected to the inner side wall of the shell (25); one end of the insert rod (23) away from the connecting tube (12) and the center of the inner side wall of the shell (25) away from the connecting tube (12); a spring (27) is sleeved on the side of the outer side wall of the insert rod (23) away from the connecting tube (12); one end of the spring (27) is fittedly connected to the side of the limiting ring (26) away from the connecting block (21); and one end of the spring (27) is fittedly connected to the outer side of the center of the inner side wall of the shell (25) away from the connecting tube (12).

4. A floating head heat exchanger sealing structure according to claim 1, characterized in that: A sealing head (28) is welded to the outer side of the upper surface of the connecting ring (15).

5. A floating head heat exchanger sealing structure according to claim 1, characterized in that: An annular limiting ring (29) is welded to the top of the inner wall of the limiting cylinder (18), and an annular limiting groove (30) is provided on the lower part of the outer wall of the connecting cylinder (12) near the insertion hole (24), and the outer wall of the annular limiting ring (29) is rotatably connected to the inner wall of the annular limiting groove (30).

6. A floating head heat exchanger sealing structure according to claim 3, characterized in that: One end of the insertion rod (23) away from the connecting tube (12) is fixedly connected with a pull button (31).

7. A floating head heat exchanger sealing structure according to claim 1, characterized in that: The lower portion of the inner wall of the limiting cylinder (18) close to the outer side of the L-shaped limiting groove (19) is slidably connected to the outer side of the outer wall of the tube plate (11) close to the outer side of the limiting block (20).

8. A floating head heat exchanger sealing structure according to claim 1, characterized in that: The upper surface of the tube plate (11) is provided with a plurality of tube holes (32).

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