A heat exchanger

Abstract

The present invention relates to a heat exchanger, comprising: a tube sheet, a shell, a sleeve, a longitudinal partition, a baffle, a pull rod and a heat exchange tube, the shell comprising a short shell section and a long shell section, one end of the short shell section is welded to the tube sheet, and the other end of the short shell section is welded to the long shell section, the sleeve comprises an upper Havers sleeve and a lower Havers sleeve, the longitudinal partition comprises a first longitudinal partition and a second longitudinal partition stacked and welded together, the first longitudinal partition is welded to the upper Havers sleeve, the second longitudinal partition is welded to the lower Havers sleeve, the first longitudinal partition and the second longitudinal partition are also welded to the inner wall of the short shell section at the same time, the free end of the upper Havers sleeve is welded to the inner wall of the short shell section through an upper Havers semicircular ring, the free end of the lower Havers sleeve is welded to the inner wall of the short shell section through a lower Havers semicircular ring, and a plurality of round steel parts are welded to the outer circumferential surface of the sleeve, thereby greatly reducing the difficulty of assembling the shell and improving the production efficiency.

Description

[Technical field]

[0001] The invention relates to the field of heat exchangers, in particular to a heat exchanger with a longitudinal partition plate. [Background technology]

[0002] In a partition heat exchanger, two fluids of different temperatures flow in a space separated by a wall, and heat is exchanged between the two fluids through heat conduction of the wall and convection of the fluid on the wall surface. There are shell and tube type, sleeve and tube type and other types of heat exchangers for partition heat exchangers. The partition heat exchanger is currently the most widely used heat exchanger. Shell and tube heat exchangers are mainly composed of shell, tube bundle, baffle and head. The shell is mostly circular, with parallel tube bundles or spiral tubes installed inside. Both ends of the tube bundle are fixed to the tube sheet. The two fluids that exchange heat in the shell and tube heat exchanger, one flows inside the tube, and its stroke is called the tube side; the other flows outside the tube, and its stroke is called the shell side. The longer the shell side, the greater its convective heat transfer coefficient, and the more favorable it is to the heat transfer process. In order to increase the shell side, people usually set a longitudinal partition in the center of the shell to divide the shell into upper and lower parts. In current technology, several pressing mechanisms 1' are first installed during installation (please refer to the structure of the pressing mechanism 1'). Figure 1 ) are installed on both sides of the longitudinal partition 2', and then the ends of the longitudinal partition are welded to the end walls of the tube sheet to form a whole. Finally, the shell is sleeved from one end of the tube sheet to the outside of the longitudinal partition and welded to the end wall of the tube sheet. After the installation is completed, the pressing mechanism abuts against the inner wall of the shell. The disadvantage of the heat exchanger with this structure is that due to the existence of the pressing mechanism on both sides of the longitudinal partition, it is difficult to install the shell, which greatly reduces the work efficiency. In addition, due to the limitations of the heat exchanger structure in the prior art, the pressing mechanism on both sides of the longitudinal partition cannot be removed. After removal, the positioning between the longitudinal partition and the shell will be unreliable.

[0003] Therefore, we thought about how to solve this technical problem by improving the structure of the heat exchanger. [Summary of the invention]

[0004] In order to solve the above problems, an object of the present invention is to provide a heat exchanger which can reduce the difficulty of shell assembly.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a heat exchanger, comprising: a tube sheet, a shell, a sleeve, a longitudinal partition, a baffle, a pull rod and a heat exchange tube, the shell comprising a short shell section and a long shell section, one end of the short shell section is welded to the tube sheet, and the other end of the short shell section is welded to the long shell section, the sleeve is arranged in the shell, the sleeve comprises an upper Havers sleeve and a lower Havers sleeve, the longitudinal partition comprises a first longitudinal partition and a second longitudinal partition stacked and welded together, the first longitudinal partition is welded to the upper Havers sleeve, the second longitudinal partition is welded to the lower Havers sleeve, the first longitudinal partition and the second longitudinal partition are also welded to the inner wall of the short shell section at the same time, the free end of the upper Havers sleeve is welded to the inner wall of the short shell section through an upper Havers semi-circular ring, the free end of the lower Havers sleeve is welded to the inner wall of the short shell section through a lower Havers semi-circular ring, and a plurality of round steel parts are welded to the outer circumferential surface of the sleeve.

[0006] Preferably, a heat exchanger in the present invention is further configured as follows: the first longitudinal partition is arranged above the second longitudinal partition, a plurality of plug welding holes are provided on the first longitudinal partition, and plug welding is adopted between the first longitudinal partition and the second longitudinal partition.

[0007] Preferably, a heat exchanger in the present invention is further configured as follows: an upper surface of the first longitudinal partition is welded to an end surface of an upper Haversian sleeve, and a lower surface of the second longitudinal partition is welded to an end surface of a lower Haversian sleeve.

[0008] Preferably, a heat exchanger in the present invention is further configured as follows: the side wall of the first longitudinal partition and the side wall of the second longitudinal partition are respectively welded to the inner wall of the short shell section.

[0009] Preferably, a heat exchanger in the present invention is further configured as follows: a plurality of round steel pieces are evenly distributed along the circumferential direction of the sleeve.

[0010] Preferably, a heat exchanger in the present invention is further configured as follows: a free end of the round steel piece is provided with a guiding slope.

[0011] Preferably, a heat exchanger in the present invention is further configured as follows: the first longitudinal partition plate and the second longitudinal partition plate are both arranged horizontally.

[0012] Compared with the prior art, the present invention has the following beneficial effects: Compared with the prior art, the present invention has made the following improvements: first, a longitudinal partition in the prior art is improved into two longitudinal partitions welded together, and then a sleeve with a Havers structure is added in the shell, so that the sleeve, the longitudinal partition and the short shell segment are welded into a whole, and finally the long shell segment is put on and welded to the short shell segment. After the above-mentioned structural improvements, the difficulty of assembly is greatly reduced, the production efficiency is improved, and the structural strength of the longitudinal partition is also greatly improved.

Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the installation structure of the tablet pressing mechanism and the longitudinal partition in the prior art.

[0014] Figure 2 It is a schematic diagram of the structure of the heat exchanger in the present invention, which reveals the situation after the long shell section is removed.

[0015] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0016] Figure 4 For along Figure 2 Schematic diagram of the cross-sectional structure along line BB shown.

[0017] Figure 5 It is a schematic diagram of the structure of the heat exchanger in the present invention, which discloses the schematic diagram of the structure after the long shell section is installed.

[0018] Figure 6 For along Figure 5 Schematic diagram of the cross-sectional structure of the CC line shown.

[0019] Figure 7 Schematic diagram of the structure of the free end of the round steel part

[0020] Figure 1 Middle: 1', tablet pressing mechanism, 2', longitudinal partition.

[0021] Figures 2 to 7 In: 1. tube sheet, 2. shell, 20. short shell section, 21. long shell section, 3. sleeve, 30. upper Havers sleeve, 300. end face of upper Havers sleeve, 31. lower Havers sleeve, 310. end face of lower Havers sleeve, 32. round steel part, 320. guide slope, 4. longitudinal partition, 40. first longitudinal partition, 400. plug welding hole, 401. side wall of first longitudinal partition, 41. second longitudinal partition, 410. side wall of second longitudinal partition, 5. baffle, 6. tie rod, 7. heat exchange tube, 8. upper Havers semicircular ring, 9. lower Havers semicircular ring. [Specific implementation method]

[0022] The heat exchanger of the present invention is further described in detail below through specific embodiments.

[0023] Ginseng Figures 2 to 7 As shown, a heat exchanger includes: a tube sheet 1, a shell 2, a sleeve 3, a longitudinal partition 4, a baffle 5, a tie rod 6 and a heat exchange tube 7. Since the structures of the baffle 5, the tie rod 6 and the heat exchange tube 7 belong to the prior art in this field, they are not described in detail.

[0024] The shell 2 includes a short shell section 20 and a long shell section 21. The left end of the short shell section 20 is welded to the end face of the tube sheet 1, and the right end of the short shell section 20 is welded to the long shell section 21. The sleeve 3 is arranged in the shell 2. The sleeve 3 includes an upper Havers sleeve 30 and a lower Havers sleeve 31. The longitudinal partition 4 includes a first longitudinal partition 40 and a second longitudinal partition 41 stacked and welded together. The first longitudinal partition 40 and the second longitudinal partition 41 are both arranged horizontally. The first longitudinal partition 40 is arranged above the second longitudinal partition 41. In this embodiment, a plurality of plug welding holes 400 are provided on the first longitudinal partition 40. Plug welding is used between the first longitudinal partition 40 and the second longitudinal partition 41. Please refer to Figure 4 The upper surface of the first longitudinal partition 40 is welded to the end surface 300 of the upper Haversian sleeve 30, and the lower surface of the second longitudinal partition 41 is welded to the end surface 310 of the lower Haversian sleeve 31. With such a welding structure, there is a certain gap between the sleeve 3 and the inner wall of the shell 2, so it is easier to sleeve the long shell section 21. Please refer to Figure 6 The side wall 401 of the first longitudinal partition 40 and the side wall 410 of the second longitudinal partition 41 are respectively welded to the inner wall of the short shell section 20. The free end of the upper Havers sleeve 30 is welded to the inner wall of the short shell section 20 through the upper Havers semicircular ring 8, and the free end of the lower Havers sleeve 31 is welded to the inner wall of the short shell section 20 through the lower Havers semicircular ring 9. A plurality of round steel pieces 32 are welded on the outer circumferential surface of the sleeve 3, and the plurality of round steel pieces 32 are evenly distributed along the circumferential direction of the sleeve 3. The free end of the round steel piece 32 is provided with a guide slope 320, which can play a guiding role when the long shell section 21 is sleeved. The round steel piece 32 has two functions, one is a limiting role, and the other is to play a role of reinforcing ribs for the sleeve 3, thereby improving the structural strength of the sleeve 3 and preventing the sleeve from being flattened by the heat exchange tube 7.

[0025] In summary, the present invention makes the following improvements compared with the prior art: first, a longitudinal partition in the prior art is improved into two longitudinal partitions welded together, and then a sleeve with a Havers structure is added in the shell, so that the sleeve, the longitudinal partition and the short shell segment are welded into a whole, and finally the long shell segment is put on and welded to the short shell segment. After the above-mentioned structural improvements, the difficulty of assembly is greatly reduced, the production efficiency is improved, and the structural strength of the longitudinal partition is also greatly improved.

[0026] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A heat exchanger, characterized in that: include: Tube sheet, shell, sleeve, longitudinal partition, baffle, pull rod and heat exchange tube, the shell includes a short shell section and a long shell section, one end of the short shell section is welded to the tube sheet, and the other end of the short shell section is welded to the long shell section, the sleeve is arranged in the shell, the sleeve includes an upper Havers sleeve and a lower Havers sleeve, the longitudinal partition includes a first longitudinal partition and a second longitudinal partition stacked and welded together, the first longitudinal partition is welded to the upper Havers sleeve, the second longitudinal partition is welded to the lower Havers sleeve, the first longitudinal partition and the second longitudinal partition are also welded to the inner wall of the short shell section at the same time, the free end of the upper Havers sleeve is welded to the inner wall of the short shell section through an upper Havers semi-circular ring, the free end of the lower Havers sleeve is welded to the inner wall of the short shell section through a lower Havers semi-circular ring, and a plurality of round steel parts are welded on the outer circumferential surface of the sleeve.

2. A heat exchanger according to claim 1, characterized in that: The first longitudinal partition is arranged above the second longitudinal partition, a plurality of plug welding holes are arranged on the first longitudinal partition, and plug welding is adopted between the first longitudinal partition and the second longitudinal partition.

3. A heat exchanger according to claim 1, characterized in that: The upper surface of the first longitudinal partition is welded to the end surface of the upper Haversian sleeve, and the lower surface of the second longitudinal partition is welded to the end surface of the lower Haversian sleeve.

4. A heat exchanger according to claim 1, characterized in that: The side wall of the first longitudinal partition and the side wall of the second longitudinal partition are respectively welded to the inner wall of the short shell segment.

5. A heat exchanger according to claim 1, characterized in that: A plurality of round steel pieces are evenly distributed along the circumferential direction of the sleeve.

6. A heat exchanger according to claim 1, characterized in that: The free end of the round steel piece is provided with a guiding inclined surface.

7. A heat exchanger according to claim 1, characterized in that: The first longitudinal partition and the second longitudinal partition are both arranged horizontally.

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