Manufacturing method of heat exchanger

Abstract

The invention relates to a manufacturing method of a heat exchanger. The manufacturing method comprises the following steps: A, firstly providing a tube plate, a heat exchange tube, a baffle plate, a pipe spacer, a pull rod, a first longitudinal partition plate, a second longitudinal partition plate, a short shell section and a long shell section; b, the first longitudinal partition plate and the second longitudinal partition plate are stacked together and subjected to plug welding; c, welding the short shell section and the tube plate; d, the longitudinal partition plate integrated piece is welded to the short shell section; e, then a pull rod, a pipe spacer and a baffle plate are installed, and the heat exchange pipe is penetrated; f, the upper half sleeve is welded to the upper portion of the first longitudinal partition plate, and the lower half sleeve is welded to the lower portion of the second longitudinal partition plate; g, welding a round steel piece on the outer side of the sleeve; h, the upper half sleeve is welded to the short shell section through an upper half semicircular ring, and the lower half sleeve is welded to the short shell section through a lower half semicircular ring; and I, finally, the long shell section is arranged on the outer side of the sleeve in a sleeving mode, and a folding seam of the short shell section and the long shell section is welded.

Description

[Technical field]

[0001] The invention relates to the field of heat exchangers, and in particular to a method for manufacturing a heat exchanger. [Background technology]

[0002] In a partition heat exchanger, two fluids with 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 beneficial 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, when manufacturing the heat exchanger, several pressing mechanisms 1' (please refer to the structure of the pressing mechanism 1') are first pressed. 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 this manufacturing method is that due to the existence of the pressing mechanism on both sides of the longitudinal partition, it is difficult to assemble the shell, which greatly reduces the work efficiency.

[0003] Therefore, it is necessary to provide a method for manufacturing a heat exchanger that solves the above technical problems. [Summary of the invention]

[0004] In order to solve the above problems, an object of the present invention is to provide a method for manufacturing 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 method for manufacturing a heat exchanger, comprising the following steps: A. first providing a tube sheet, a heat exchange tube, a baffle, a distance tube, a tie rod, a first longitudinal baffle, a second longitudinal baffle, a short shell segment and a long shell segment; B. then arranging a plurality of plug welding holes on the first longitudinal baffle, stacking the first longitudinal baffle and the second longitudinal baffle together and plug welding the plug welding holes so that the first longitudinal baffle and the second longitudinal baffle form a longitudinal baffle integral part; C. then welding the short shell segment to the tube sheet; D. then welding the side wall of the longitudinal baffle integral part to the inner wall of the short shell segment; E. Then install the tie rod, the distance tube and the baffle, and after the installation is completed, thread the heat exchange tube; F. After the threading of the heat exchange tube is completed, weld the upper Haver sleeve to the top of the first longitudinal partition, and weld the lower Haver sleeve to the bottom of the second longitudinal partition; G. After the welding of the upper Haver sleeve and the lower Haver sleeve is completed, weld several round steel parts on the outside of the sleeve; H. Then the left end of the upper Haver sleeve is welded to the inner wall of the short shell segment through the upper Haver semicircular ring, and the left end of the lower Haver sleeve is welded to the inner wall of the short shell segment through the lower Haver semicircular ring; I. Finally, the long shell segment is sleeved on the outside of the sleeve and the closing seam of the short shell segment and the long shell segment is welded.

[0006] Preferably, a method for manufacturing a heat exchanger in the present invention is further configured as follows: in the above step B, a plurality of plug welding holes are evenly arranged along the first longitudinal partition, and the first longitudinal partition has the same size as the second longitudinal partition.

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

[0008] Preferably, a method for manufacturing a heat exchanger in the present invention is further configured as follows: in the above step G, a plurality of round steel pieces are evenly arranged along the circumferential direction of the sleeve.

[0009] Compared with the prior art, the present invention has the following beneficial effects: the present invention improves the manufacturing process of the traditional heat exchanger, improves the structure of the traditional longitudinal partition into a structure of two longitudinal partitions stacked and welded together, and adds a sleeve of Haversian structure 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 with the short shell segment. After the above improvements, the difficulty of assembly is greatly reduced, the production efficiency is improved, and the structural strength of the internal parts of the heat exchanger is also greatly improved.

Brief Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the installation structure of the tablet pressing mechanism and the longitudinal partition in the prior art.

[0011] Figure 2 It is a structural schematic diagram of step B of the present invention.

[0012] Figure 3 It is a structural schematic diagram of step C of the present invention.

[0013] Figure 4 Schematic diagram of the structure of step D of the present invention.

[0014] Figure 5 Schematic diagram of the structure of step E of the present invention.

[0015] Figure 6 Schematic diagram of the structure of step F of the present invention.

[0016] Figure 7 Schematic diagram of the structure of step G of the present invention.

[0017] Figure 8 Schematic diagram of the structure of step H of the present invention.

[0018] Fig. 9 It is a structural schematic diagram of step I of the present invention.

[0019] Fig.10 for Fig. 9 A partial enlarged view of point A in the middle.

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

[0021] Figures 2 to 10 In: 1. tube sheet, 2. heat exchange tube, 3. baffle, 4. tie rod, 5. first longitudinal partition, 50. plug welding hole, 51. upper surface of the first longitudinal partition, 6. second longitudinal partition, 60. lower surface of the second longitudinal partition, 7. short shell section, 8. long shell section, 9. longitudinal partition integral part, 90. side wall, 10. upper Havers sleeve, 100. end face of upper Havers sleeve, 11. lower Havers sleeve, 110. end face of lower Havers sleeve, 12. round steel part, 13. upper Havers semicircular ring, 14. lower Havers semicircular ring, 15. closing seam. [Specific implementation method]

[0022] The following is a further detailed description of a method for manufacturing a heat exchanger according to the present invention through specific embodiments.

[0023] See also Figures 2 to 10 A method for manufacturing a heat exchanger comprises the following steps: A. firstly providing a tube sheet 1, a heat exchange tube 2, a baffle 3, a distance tube (not shown), a tie rod 4, a first longitudinal baffle 5, a second longitudinal baffle 6, a short shell section 7 and a long shell section 8; B. referring to Figure 2Then, a plurality of plug welding holes 50 are set on the first longitudinal partition 5, the first longitudinal partition 5 and the second longitudinal partition 6 are stacked together and the plug welding holes 50 are plug welded so that the first longitudinal partition 5 and the second longitudinal partition 6 form a longitudinal partition integrated part 9. In this embodiment, the plurality of plug welding holes 50 are evenly arranged along the first longitudinal partition 5, and the first longitudinal partition 5 and the second longitudinal partition 6 have the same size; C. Please refer to Figure 3 , then weld the short shell section 7 to the tube sheet 1; D. Please refer to Figure 4 Then, the side wall 90 of the longitudinal partition integral part 9 is welded to the inner wall of the short shell section 7; E. Please refer to Figure 5 Then install the tie rod 4, the distance tube and the baffle 3. After the installation is completed, the heat exchange tube 2 is threaded. This step belongs to the prior art and is not described in detail; F. Please refer to Figure 6 After the heat exchange tube 2 is threaded, the upper Havers sleeve 10 is welded to the top of the first longitudinal partition 5, and the lower Havers sleeve 11 is welded to the bottom of the second longitudinal partition 6. Specifically, the end face 100 of the upper Havers sleeve 10 is welded to the upper surface 51 of the first longitudinal partition 5, and the end face 110 of the lower Havers sleeve 11 is welded to the lower surface 60 of the second longitudinal partition 6. This structure leaves a gap between the sleeve and the long shell section 8, so it is particularly easy to install the long shell section 8 later. G. Please refer to Figure 7 After the upper Haversian sleeve 10 and the lower Haversian sleeve 11 are welded, several round steel pieces 12 are welded on the outside of the sleeve. In this embodiment, several round steel pieces 12 are evenly arranged along the circumference of the sleeve. The round steel pieces 12 have two functions: one is to limit the position, and the other is to act as the sleeve reinforcement rib to prevent the sleeve from being flattened by the heat exchange tube 2. H. Please refer to Figure 8 Then the left end of the upper Havers sleeve 10 is welded to the inner wall of the short shell segment 7 through the upper Havers semicircular ring 13, and the left end of the lower Havers sleeve 11 is welded to the inner wall of the short shell segment 7 through the lower Havers semicircular ring 14; I. Please refer to Fig. 9 and Fig.10 Finally, the long shell section 8 is sleeved on the outside of the sleeve and the closing seam 15 between the short shell section 7 and the long shell section 8 is welded.

[0024] In summary, the present invention improves the manufacturing process of the traditional heat exchanger by improving the structure of the traditional longitudinal partition into a structure of two longitudinal partitions stacked and welded together, and adds a sleeve with a Havers structure 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 with the short shell segment. After the above improvements, the difficulty of assembly is greatly reduced, the production efficiency is improved, and the structural strength of the internal parts of the heat exchanger is also greatly improved.

[0025] 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 method for manufacturing a heat exchanger, characterized in that: The steps include: A. First, provide tube sheets, heat exchange tubes, baffles, distance tubes, tie rods, first longitudinal baffles, second longitudinal baffles, short shell sections and long shell sections; B. Then, a plurality of plug welding holes are provided on the first longitudinal partition, the first longitudinal partition and the second longitudinal partition are stacked together, and the plug welding holes are plug welded so that the first longitudinal partition and the second longitudinal partition form an integral longitudinal partition member; C. Then weld the short shell section to the tube sheet; D. Then, the side wall of the longitudinal partition integral part is welded to the inner wall of the short shell section; E. Then install the tie rod, distance tube and baffle, and thread the heat exchange tube after installation; F. After the heat exchange tubes are threaded, the upper Havers sleeve is welded to the top of the first longitudinal partition, and the lower Havers sleeve is welded to the bottom of the second longitudinal partition; G. After the upper Haver sleeve and the lower Haver sleeve are welded, several round steel parts are welded on the outside of the sleeve; H. Then the left end of the upper Havers sleeve is welded to the inner wall of the short shell segment through the upper Havers semicircular ring, and the left end of the lower Havers sleeve is welded to the inner wall of the short shell segment through the lower Havers semicircular ring; I. Finally, the long shell section is sleeved on the outside of the sleeve and the closing seam between the short shell section and the long shell section is welded.

2. The method for manufacturing a heat exchanger according to claim 1, characterized in that: In the above step B, a plurality of plug welding holes are evenly arranged along the first longitudinal partition, and the first longitudinal partition has the same size as the second longitudinal partition.

3. The method for manufacturing a heat exchanger according to claim 1, characterized in that: In the above step F, specifically, the end surface of the upper Haversian sleeve is welded to the upper surface of the first longitudinal partition, and the end surface of the lower Haversian sleeve is welded to the lower surface of the second longitudinal partition.

4. The method for manufacturing a heat exchanger according to claim 1, characterized in that: In the above step G, a plurality of round steel pieces are evenly arranged along the circumferential direction of the sleeve.

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