Heat exchanger

Abstract

The utility model discloses a heat exchanger, which belongs to the technical field of heat exchangers and comprises a cylinder, a tube bundle is arranged in the cylinder, and a guide cylinder is wrapped on the outer side of the tube bundle. A filler sealing structure is arranged on the outer cylinder wall of the guide cylinder, the filler sealing structure comprises two check rings, filler is clamped between the two check rings, and the outer side of the filler can abut against the inner wall of the cylinder body. The structure can prevent the gap between the guide cylinder and the heat exchanger cylinder from leaking flow.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely relates to a heat exchanger. BACKGROUND

[0002] When the shell-and-tube heat exchanger is manufactured, due to the influence of machining and assembly mode and precision, a certain gap needs to be reserved between the tube bundle and the cylinder, and the gap is often difficult to control, and a large gap will cause leakage, so that the heat exchanger cannot reach the design effect, and a small gap will cause assembly difficulty, and even the assembly cannot be completed.

[0003] Therefore, when the heat exchange requirement is not very low and the shell flow is not large enough, a flow guide device is often introduced. The existing flow guide device uses a welded structure, which is not convenient to operate and often affects subsequent machining, flaw detection and the like, because once welded, the tube bundle cannot be moved, so the operation mode and size requirement need to be planned in advance, but size distribution may still be uneven and the edge may be large. In order to complete the flaw detection operation, the space may be artificially increased, which increases the cost of the heat exchanger, increases the space structure and increases the operation cost. Moreover, if the equipment needs to be modified or repaired in the later period, it will become extremely difficult, and even the modification fails and the equipment is scrapped.

[0004] The prior art CN114877723A sets a steel sheet or other sealing structure between the flow guide cylinder and the cylinder to realize direct non-fixed connection of the flow guide cylinder and the cylinder, but leakage is still easy to occur, and the hard sealing of the steel sheet and the like cannot achieve the purpose of preventing leakage when the cylinder roundness is not up to standard. Moreover, the above structure will become worse and worse with long-term use, causing short-circuit leakage failure of the heat exchanger.

[0005] In view of the above problems, the utility model designs and manufactures a heat exchanger to overcome the above defects. UTILITY MODEL CONTENTS

[0006] For the problems existing in the prior art, the heat exchanger provided by the utility model can prevent the gap leakage between the flow guide cylinder and the heat exchanger cylinder.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme: a heat exchanger, comprising a cylinder, a tube bundle is arranged in the cylinder, and a flow guide cylinder is wrapped outside the tube bundle;

[0008] A packing sealing structure is arranged on the outer cylinder wall of the flow guide cylinder, the packing sealing structure comprises two stop rings, and a packing is arranged between the two stop rings, and the outer side of the packing can abut against the inner wall of the cylinder.

[0009] Preferably, the packing is a soft packing.

[0010] Preferably, two said baffle rings are fixedly connected to the outer cylinder wall of the flow guide cylinder.

[0011] Alternatively, one said baffle ring is fixedly connected to the outer cylinder wall of the flow guide cylinder, and the other said baffle ring is movably connected to the outer cylinder wall of the flow guide cylinder, and the two said baffle rings can be connected by bolts and the spacing between the two baffle rings can be adjusted.

[0012] Preferably, the end surface of the baffle ring in contact with the packing is provided with a protrusion or a groove.

[0013] Preferably, the flow guide cylinder is provided with at least one packing seal structure.

[0014] Preferably, when the flow guide cylinder is provided with a plurality of packing seal structures, the baffle ring of the packing seal structure close to the medium inlet is provided with an axial exhaust hole.

[0015] Preferably, the packing seal structure is arranged at one end of the cylinder body with mild working conditions.

[0016] Preferably, the flow guide cylinder is further provided with a mounting ring, and the mounting ring is connected with an elastic ring piece, and the outer diameter of the elastic ring piece is greater than the inner diameter of the cylinder body.

[0017] After the flow guide cylinder is assembled with the cylinder body, the elastic ring piece is bent and tightly adheres to the inner wall of the cylinder body.

[0018] Preferably, the elastic ring piece is arranged away from the position of the medium inlet.

[0019] Preferably, when the cylinder body is horizontally arranged, the bottom of the flow guide cylinder is provided with a pad, and the height of the pad is slightly smaller than the spacing between the flow guide cylinder and the cylinder body.

[0020] The utility model has the advantages of:

[0021] 1. The packing seal structure is used to prevent the leakage flow between the flow guide cylinder and the cylinder body of the heat exchanger, so that the shell side medium can only flow through the tube bundle inside the flow guide cylinder, the heat exchange effect is improved, the heat exchange loss is reduced, and when the tube bundle is assembled with the cylinder body, the movement adjustment is allowed, the welding, flaw detection and other operations of other parts in the cylinder body are facilitated, and the later modification and maintenance are also convenient.

[0022] 2. The packing seal structure can also solve the problem of assembly collision damage between the flow guide cylinder and the cylinder body due to the small spacing therebetween.

[0023] 3. Even when the roundness of the flow guide cylinder or the cylinder body is not high, since the packing is soft and the outer side of the packing can abut against the inner wall of the cylinder body, the flow blocking effect can still be maintained.

[0024] 4. When multiple packing seal structures are used, the retaining ring of the packing seal structure near the medium inlet is provided with an axial vent hole. The shell-side medium and the gas inside the medium enter between the two packing seal structures through the axial vent hole, which plays a role in balancing the pressure. Moreover, since the flow is blocked by the first packing seal structure, the sealing pressure of the next packing seal structure in the direction of medium flow is reduced, making it easier to ensure the anti-leakage effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a heat exchanger;

[0026] Figure 2 This is a cross-sectional view of the packing sealing structure of this utility model;

[0027] Figure 3 This is a cross-sectional view of the retaining ring of this utility model having a groove.

[0028] Figure 4 A cross-sectional view showing a protrusion on the retaining ring of this utility model;

[0029] Figure 5 This is a schematic diagram of the elastic ring plate of this utility model.

[0030] In the diagram: 1. Cylinder; 2. Guide tube; 3. Tube bundle; 4. Packing sealing structure; 5. Gasket; 6. Mounting ring; 7. Elastic ring; 41. Retaining ring; 42. Packing. Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0032] like Figures 1 to 5 As shown, a heat exchanger includes a cylinder 1, in which a tube bundle 3 is provided. The tube bundle 3 is tightly wrapped by a guide tube 2 on the outside. One end of the guide tube 2 is generally fixed to the tube bundle 3 by a fixing hoop and an auxiliary connection structure to ensure that the tube bundle 3 and the guide tube 2 form an integral structure.

[0033] The outer wall of the guide tube 2 is provided with a packing seal structure 4, which includes two retaining rings 41, with packing 42 sandwiched between the two retaining rings 41. The packing 42 is preferably a soft packing, such as EPDM rubber or modified polytetrafluoroethylene, and the specific material is selected according to the shell-side medium and operating parameters. The specific size of the packing 42 is determined by the gap between the guide tube 2 and the cylinder 1, and the specific size cannot be smaller than the gap between the guide tube 2 and the cylinder 1.

[0034] The two retaining rings 41 in the structure prevent the filler 42 from sliding on the flow guide cylinder 2, and the filler 42 is deformed in the radial direction when compressed between the two retaining rings 41, and the outer side of the filler 42 can abut against the inner wall of the cylinder 1, thereby ensuring the interception effect.

[0035] Specifically, the filler sealing structure 4 prevents the gap between the flow guide cylinder 2 and the heat exchanger cylinder 1 from leaking, so that the shell side medium can only flow through the tube bundle 3 inside the flow guide cylinder 2, thereby improving the heat exchange effect and reducing the heat exchange loss. When the tube bundle 3 is assembled with the flow guide cylinder 2 and the cylinder 1, the movement adjustment is allowed, which is convenient for welding, flaw detection and other operations of other parts in the cylinder 1, and the later modification and maintenance are also convenient.

[0036] The two retaining rings 41 can be fixedly connected to the outer cylinder wall of the flow guide cylinder 2, and the outer diameter of the retaining ring 41 is smaller than the inner diameter of the cylinder 1. Alternatively, one retaining ring 41 is fixedly connected to the outer cylinder wall of the flow guide cylinder 2, and the other retaining ring 41 is movably connected to the outer cylinder wall of the flow guide cylinder 2. The two retaining rings 41 can be connected by bolts and the spacing between the two retaining rings 41 can be adjusted. The end surface of the retaining ring 41 in contact with the filler 42 is preferably provided with a protrusion or a groove, which can prevent the filler 42 from separating from the two retaining rings 41.

[0037] The flow guide cylinder 2 is provided with at least one filler sealing structure 4, so that even when the roundness of the flow guide cylinder 2 or the cylinder 1 is not high, the number of filler sealing structures 4 on the flow guide cylinder 2 can be increased to maintain the interception effect.

[0038] When the flow guide cylinder 2 is provided with a plurality of filler sealing structures 4, the retaining ring 41 of the filler sealing structure 4 close to the medium inlet is preferably provided with an axial exhaust hole. The shell side medium and the gas in the medium enter between the two filler sealing structures 4 through the axial exhaust hole, which can balance the pressure. Moreover, due to the interception by the first filler sealing structure 4, the sealing pressure of the filler sealing structure 4 in the medium flow direction is reduced, which can more easily ensure the leakage prevention effect.

[0039] The filler sealing structure 4 is preferably arranged at one end of the cylinder 1 with moderate working conditions, such as the end with lower temperature, to ensure the service life of the filler 42.

[0040] The flow guide cylinder 2 is further preferably provided with a mounting ring 6, and the mounting ring 6 is connected with an elastic ring piece 7. The outer diameter of the elastic ring piece 7 is greater than the inner diameter of the cylinder 1. After the flow guide cylinder 2 is assembled with the cylinder 1, the elastic ring piece 7 is bent and tightly attached to the inner wall of the cylinder 1, thereby eliminating the gap and playing a resistance flow role. The elastic ring piece 7 does not need to be welded to the inner wall of the cylinder 1, thereby reducing the welding workload and the probability of deformation of the cylinder 1. The elastic ring piece 7 is preferably arranged away from the medium inlet position, so that the filler sealing structure 4 plays a main interception function.

[0041] The bottom of the flow guide cylinder 2 is preferably provided with a cushion block 5 when the cylinder body 1 is horizontally arranged, the height of the cushion block 5 is slightly less than the interval between the flow guide cylinder 2 and the cylinder body 1, so that the packing 42 can maintain normal blocking circle 41 extrusion deformation, and the cutting effect of the packing 42 is improved.

[0042] The specific flow process of the shell side medium is as follows:

[0043] The shell side medium enters from the medium inlet at the end of the cylinder body 1, is cut off by the packing sealing structure 4 when passing through the gap between the flow guide cylinder 2 and the cylinder body 1, and thus can only flow into the pipe bundle 3 inside the flow guide cylinder 2 and finally flow out from the medium outlet at the other end of the cylinder body 1, so that heat exchange is completed.

[0044] It should be understood that the use of these embodiments is only for the purpose of illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A heat exchanger, characterized in that, It includes a cylindrical body (1), in which a tube bundle (3) is provided, and a guide tube (2) is wrapped around the outside of the tube bundle (3); The outer wall of the guide tube (2) is provided with a packing sealing structure (4). The packing sealing structure (4) includes two retaining rings (41) and a packing (42) is sandwiched between the two retaining rings (41). The outer side of the packing (42) can abut against the inner wall of the cylinder (1).

2. A heat exchanger according to claim 1, characterized in that, The packing material (42) is a soft packing material.

3. A heat exchanger according to claim 1, characterized in that, The two retaining rings (41) are fixed to the outer wall of the guide tube (2); Alternatively, one of the retaining rings (41) is fixed to the outer wall of the guide tube (2), and the other retaining ring (41) is movably connected to the outer wall of the guide tube (2). The two retaining rings (41) can be connected by bolts and the distance between the two retaining rings (41) can be adjusted.

4. A heat exchanger according to claim 1, characterized in that, The end face of the retaining ring (41) that contacts the packing (42) is provided with a protrusion or a groove.

5. A heat exchanger according to claim 1, characterized in that, The guide tube (2) is provided with at least one packing seal structure (4).

6. A heat exchanger according to claim 5, characterized in that, When the guide tube (2) is provided with multiple packing seal structures (4), the retaining ring (41) of the packing seal structure (4) near the medium inlet is provided with an axial exhaust hole.

7. A heat exchanger according to claim 1, characterized in that, The packing seal structure (4) is located at the end of the cylinder (1) where the operating conditions are mild.

8. A heat exchanger according to claim 1, characterized in that, The guide tube (2) is also provided with an installation ring (6), and an elastic ring plate (7) is connected to the installation ring (6). The outer diameter of the elastic ring plate (7) is larger than the inner diameter of the tube body (1). After the guide tube (2) is assembled with the cylinder (1), the elastic ring (7) bends and fits tightly against the inner wall of the cylinder (1).

9. A heat exchanger according to claim 8, characterized in that, The elastic ring (7) is positioned away from the medium inlet.

10. A heat exchanger according to claim 1, characterized in that, When the cylinder (1) is horizontally arranged, a pad (5) is provided at the bottom of the guide cylinder (2), and the height of the pad (5) is slightly smaller than the distance between the guide cylinder (2) and the cylinder (1).

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