A shell-and-tube heat exchanger

Abstract

This utility model relates to a shell-and-tube heat exchanger, belonging to the field of heat exchange equipment. It includes a baffle plate and heat exchange tubes, the heat exchange tubes passing through a tube hole in the baffle plate. It also includes a transition sleeve fitted between the outer wall of the heat exchange tubes and the inner wall of the tube hole. A first radial boss is provided at the first end of the transition sleeve, the maximum outer diameter of which is larger than the inner diameter of the tube hole. A notch is provided along the axial direction of the transition sleeve on its sidewall. The transition sleeve is made of a soft material. This design effectively reduces friction between the heat exchange tubes and the baffle plate tube hole caused by fluid flow or mechanical vibration in the shell side of the heat exchanger, thus improving the service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment, specifically to a shell-and-tube heat exchanger. Background Technology

[0002] During operation, the flow of fluid in the shell-side of a shell-and-tube heat exchanger or mechanical vibration can cause continuous friction between the heat exchange tubes and the baffle tube holes. Over time, this can easily lead to wear and even perforation and leakage of the heat exchange tubes. This problem is particularly pronounced for heat exchange tubes made of high-value special materials such as zirconium and nickel, where the material has lower hardness and thinner wall thickness, significantly impacting the lifespan of the equipment.

[0003] Traditional solutions, such as increasing the wall thickness of the heat exchange tubes and increasing the size of the baffle tube holes, are costly, have limited effectiveness, and cannot effectively prevent wear. Utility Model Content

[0004] To at least partially solve the above-mentioned technical problems, this utility model provides a shell-and-tube heat exchanger that can effectively reduce the friction between the heat exchange tubes and the baffle tube holes caused by fluid flow or mechanical vibration in the shell side of the heat exchanger, thereby improving the service life of the equipment.

[0005] To achieve the above objectives, this utility model provides a shell-and-tube heat exchanger, comprising a baffle plate and heat exchange tubes, wherein the heat exchange tubes pass through a tube hole in the baffle plate. The invention is characterized by further comprising a transition sleeve, which is fitted between the outer wall of the heat exchange tubes and the inner wall of the tube hole; a first radial boss is provided at the first end of the transition sleeve, the maximum outer diameter of the first radial boss being larger than the inner diameter of the tube hole; a notch is provided on the sidewall of the transition sleeve along its axial direction; and the transition sleeve is made of a soft material.

[0006] As a preferred embodiment of the present invention, the first radial boss further includes a recessed platform that runs radially inward along the transition sleeve, and the recessed platform is used to make the notch located at the position of the first radial boss a closed structure.

[0007] As a preferred embodiment of this utility model, a second radial boss is provided at the second end of the transition sleeve, and the maximum outer diameter of the second radial boss is greater than the inner diameter of the tube hole.

[0008] As a preferred embodiment of the present invention, the second radial boss is provided with a circumferential inclined surface, which is inclined inward toward the second end of the transition sleeve.

[0009] As a preferred embodiment of this utility model, the angle between the first radial boss and / or the second radial boss and the side wall of the transition sleeve is set to a right angle.

[0010] As a preferred embodiment of the present invention, it further includes a retaining ring, which is engaged between the second radial boss and the baffle plate.

[0011] As a preferred embodiment of the present invention, the retaining ring further includes a recessed platform extending radially inward along the transition sleeve. The recessed platform is disposed at the notch and transitionally engages with the two sides of the notch.

[0012] As a preferred technical solution of this utility model, the two sides of the notch gradually shrink from the outside to the inside along the radial direction of the transition sleeve.

[0013] The advantages of this utility model are:

[0014] 1. The soft transition sleeve effectively isolates the metal contact between the heat exchange tubes and the baffle plate, avoiding friction damage and extending the service life of the equipment. During the operation of the heat exchanger, the transition sleeve expands due to heat and fills the gap between the baffle plate tube holes. With the cooperation of the first radial boss set at the first end of the transition sleeve, the leakage between the heat exchange tubes and the baffle plate tube holes is effectively reduced, improving the heat exchange efficiency. In addition, the side wall of the transition sleeve is provided with a notch for easy installation.

[0015] 2. The presence of a countersunk plate via a first radial boss and a retaining ring further prevents leakage between the heat exchange tube and the baffle plate tube hole. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of an example of the connection between the heat exchange tubes and the baffles in the shell-and-tube heat exchanger of this utility model via a transition sleeve.

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the transition sleeve of this utility model;

[0018] Appendix Figure 3 This is a schematic diagram of Example 2 of the structure of the shell-and-tube heat exchanger of this utility model, showing the connection between the heat exchange tubes and the baffles via a transition sleeve.

[0019] Appendix Figure 4 This is a schematic diagram of Example 2 of the transition sleeve of this utility model;

[0020] Appendix Figure 5 This is a schematic diagram of Example 3 of the structure of the shell-and-tube heat exchanger of this utility model, showing the connection between the heat exchange tubes and the baffles via a transition sleeve.

[0021] Appendix Figure 6 This is a schematic diagram of Example 3 of the transition sleeve of this utility model;

[0022] In the figure, 1-baffle plate, 2-heat exchange tube, 3-pipe hole, 4-transition sleeve, 5-clamping ring, 41-first radial boss, 42-notch, 43-counterpart, 44-second radial boss, 45-sloping surface. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0025] The directional terms mentioned in the embodiments of this utility model, such as "upper" and "lower", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0026] In the description of embodiments of this utility model, the term "comprising" or any other variations thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0027] Example 1

[0028] like Figure 1-2 As shown, this embodiment of the present disclosure provides a shell-and-tube heat exchanger, including a baffle plate 1 and heat exchange tubes 2. The heat exchange tubes 2 pass through the baffle plate 1 through tube holes 3. The feature is that it also includes a transition sleeve 4, which is sleeved between the outer wall of the heat exchange tubes 2 and the inner wall of the tube holes 3. A first radial boss 41 is provided at the first end of the transition sleeve 4, and the maximum outer diameter of the first radial boss 41 is greater than the inner diameter of the tube holes 3. A notch 42 is provided on the side wall of the transition sleeve 4 along the axial direction of the transition sleeve 4. The transition sleeve 4 is made of a soft material.

[0029] The aforementioned soft material is a soft material with a low coefficient of friction, such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), or graphite composite materials. These are examples provided without limitation. The maximum outer diameter of the first radial boss 41 is larger than the inner diameter of the tube hole 3, ensuring that the end of the transition sleeve 4 can engage with the baffle plate 1 during installation. Specifically, during installation, the transition sleeve 4 is first compressed and inserted into the tube hole 3, then the heat exchange tube 2 is inserted. After the transition sleeve 4 springs back, it fits against the inner wall of the tube hole 3.

[0030] The soft transition sleeve 4 effectively isolates the metal contact between the heat exchange tube 2 and the baffle plate 1, avoiding friction damage and extending the service life of the equipment. During the operation of the heat exchanger, the transition sleeve 4 expands due to heat and fills the gap of the tube hole 3 of the baffle plate 1. With the cooperation of the first radial boss 41 set at the first end of the transition sleeve 4, the leakage between the heat exchange tube 2 and the tube hole 3 of the baffle plate 1 is effectively reduced, thus improving the heat exchange efficiency. In addition, the side wall of the transition sleeve 4 is provided with a notch 42 for easy installation.

[0031] Furthermore, the first radial boss 41 also includes a recessed platform 43 extending radially inward along the transition sleeve 4. The recessed platform 43 ensures that the notch 42 is located at the position of the first radial boss 41, forming a closed structure. This further prevents leakage between the heat exchange tube 2 and the tube hole 3 of the baffle 1.

[0032] Furthermore, the two sides of the notch 42 gradually contract from the outside to the inside along the radial direction of the transition sleeve 4. After the transition sleeve 4 expands due to heat, the gap of the notch 42 closes, further preventing leakage between the heat exchange tube 2 and the tube hole 3 of the baffle plate 1.

[0033] Example 2

[0034] like Figure 3-4 As shown, in this embodiment, based on Embodiment 1, a second radial boss 44 is provided at the second end of the transition sleeve 4. The maximum outer diameter of the second radial boss 44 is larger than the inner diameter of the pipe hole 3. Through the provision of the second radial boss 44, the transition sleeve 4 forms an annular groove, which mechanically engages with the inner wall of the pipe hole 3 of the baffle plate 1 to prevent axial sliding.

[0035] Furthermore, the second radial boss 44 is provided with a circumferential inclined surface 45, which slopes inward toward the second end of the transition sleeve 4. The inclined surface 45 facilitates the installation of the transition sleeve 4.

[0036] Furthermore, the angle between the first radial boss 41 and / or the second radial boss 44 and the sidewall of the transition sleeve 4 is set to a right angle. By setting the right angle, the transition sleeve 4 and the sidewall of the baffle 1 can be more effectively fitted together.

[0037] Example 3

[0038] like Figure 5-6As shown, this embodiment of the present disclosure, based on embodiment two, further includes a retaining ring 5, which is engaged between the second radial boss 44 and the baffle plate 1, thereby achieving enhanced fixation of the transition sleeve 4.

[0039] Furthermore, the retaining ring 5 also includes a recessed platform 43 that extends radially inward along the transition sleeve 4. The recessed platform 43 is located at the notch 42 and transitionally engages with both sides of the notch 42. The recessed platform 43 of the retaining ring 5 provides a better anti-leakage effect.

[0040] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shell-and-tube heat exchanger, comprising baffles and heat exchange tubes, wherein the heat exchange tubes pass through the baffles via tube holes, characterized in that, It also includes a transition sleeve, which is fitted between the outer wall of the heat exchange tube and the inner wall of the tube hole; a first radial boss is provided at the first end of the transition sleeve, and the maximum outer diameter of the first radial boss is greater than the inner diameter of the tube hole; a notch is provided on the side wall of the transition sleeve along the axial direction of the transition sleeve; the transition sleeve is made of a soft material.

2. A shell-and-tube heat exchanger according to claim 1, characterized in that, The first radial boss also includes a recessed platform that runs radially inward along the transition sleeve, and the recessed platform is used to make the notch located at the position of the first radial boss a closed structure.

3. A shell-and-tube heat exchanger according to claim 2, characterized in that, The second end of the transition sleeve is provided with a second radial boss, the maximum outer diameter of which is greater than the inner diameter of the tube hole.

4. A shell-and-tube heat exchanger according to claim 3, characterized in that, The second radial boss is provided with a circumferential inclined surface, which is inclined inward toward the second end of the transition sleeve.

5. A shell-and-tube heat exchanger according to claim 4, characterized in that, The angle between the first radial boss and / or the second radial boss and the sidewall of the transition sleeve is set to a right angle.

6. A shell-and-tube heat exchanger according to claim 4, characterized in that, It also includes a retaining ring, which is engaged between the second radial boss and the baffle plate.

7. A shell-and-tube heat exchanger according to claim 6, characterized in that, The retaining ring also includes a recessed platform that runs radially inward along the transition sleeve. The recessed platform is located at the notch and transitionally engages with both sides of the notch.

8. A shell-and-tube heat exchanger according to claim 1, characterized in that, The two sides of the notch gradually taper inward from the outside along the radial direction of the transition sleeve.

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