High-temperature tubular heat exchanger

Abstract

The invention discloses a high-temperature tubular heat exchanger which comprises a shell, a hot liquid inlet, a hot liquid outlet, a tube box, a cold liquid inlet, a cold liquid outlet, a heat exchange tube bundle, a baffling mechanism and an anti-scour mechanism. The baffling mechanism is arranged in the middle section of the surface of the heat exchange tube bundle, the sleeving cavity can be detached from the surface of the connecting piece by detaching the connecting bolts of the first mounting hole and the second mounting hole, then a new baffling guide plate is nested on the surface of the connecting piece through the sleeving cavity, and then the first mounting hole and the second mounting hole are inserted and locked through the bolts, so that the heat exchange tube bundle is formed. The split type structure is simple in replacement operation and low in cost, the later maintenance pressure of equipment can be relieved, in addition, the baffling base plates and the baffling guide plates play a role in adjusting the flow direction, the excellent heat conduction characteristics of the baffling base plates and the baffling guide plates can help the heat exchange tube bundle and fluid to achieve higher-efficiency heat exchange, and the heat exchange efficiency is improved. The baffling guide plate can enlarge the heat exchange area with fluid by means of the fin base, and the heat exchange efficiency of the heat exchange tube bundle is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular heat exchangers, and specifically to a high-temperature tubular heat exchanger. Background Art

[0002] A tubular heat exchanger is a type of shell-and-tube heat exchanger with the tube wall as the heat transfer surface, consisting of a shell, a tube bundle, tube sheets, baffles, etc. The hot and cold fluids flow in the tube side and the shell side respectively, and has the characteristics of high temperature resistance, high pressure resistance, and stable structure, and is widely used in the fields of chemical industry, energy, etc. The existing patent application number: 202322879081.4, a new type of tubular heat exchanger, includes: a base shell, a medium outlet pipe 1 is fixedly connected to the top of the base shell, a medium outlet pipe 1 is fixedly connected to the bottom of the base shell, mounting plates 1 are arranged at both ends of the base shell, fastening bolts are arranged on the mounting plates 1, a sealing cylinder is arranged on the left side of the mounting plate 1, and a medium inlet pipe 2 is fixedly connected to the top of the sealing cylinder.

[0003] The above patent describes a tubular heat exchanger. Currently, the tube bundle of the tubular heat exchanger is usually fixed to the baffle by welding. The main function of the baffle is to change the fluid flow direction. It is located in the main channel inside the shell and will be continuously scoured and impacted by the fluid for a long time. However, due to the integrated structure of the baffle, it is difficult to replace the baffle after wear, and the processing cost is high, which is not conducive to later maintenance. In addition, the functional structure of the baffle can be further improved to further improve the heat transfer efficiency of the tube bundle. An impact protection sleeve is usually installed on the surface of the tube bundle of the tubular heat exchanger to prevent the rapid fluid at the inlet and outlet from directly impacting the tube bundle. The existing impact protection sleeve is a circular guard plate, which lacks buffering measures. Most of the impact force of the fluid will still be transmitted to the surface of the tube bundle through the circular guard plate. Under long-term application, the tube bundle is prone to problems such as deformation and displacement. The functional structure of the impact protection sleeve can be further improved to enhance the protection ability of the tube bundle. Therefore, we propose a high-temperature tubular heat exchanger to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-temperature tubular heat exchanger to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A high-temperature tubular heat exchanger, comprising a shell, a hot liquid inlet, a hot liquid outlet, a tube box, a cold liquid inlet, a cold liquid outlet, a heat exchange tube bundle, a baffle mechanism and an anti-impingement mechanism. The hot liquid inlet is provided at the lower left end of the shell, the hot liquid outlet is provided at the upper right end of the shell, a tube box is flange-mounted at the top port of the shell, the cold liquid inlet is provided on the left side of the tube box, and the cold liquid outlet is provided on the right side of the tube box. The cold liquid inlet and the cold liquid outlet are separated independently by a partition. The heat exchange tube bundle is installed at the bottom of the tube box. The head end of the heat exchange tube bundle is communicated with the cold liquid inlet, and the tail end of the heat exchange tube bundle is communicated with the cold liquid outlet. The shell is sleeved and installed outside the heat exchange tube bundle. A baffle mechanism is arranged in the middle section of the surface of the heat exchange tube bundle. The baffle mechanism comprises a baffle base plate, a first sleeve hole, a connecting piece, a first mounting hole, a baffle guide plate, a socket cavity and a second mounting hole. The baffle base plate is arranged in the middle section of the surface of the heat exchange tube bundle. The first sleeve hole is formed on the surface of the baffle base plate. The baffle base plate is fixedly installed outside the heat exchange tube bundle through the first sleeve hole. The connecting piece is integrally arranged along the side edge of the surface of the baffle base plate. The first mounting hole is formed through the edge of the surface of the connecting piece. The baffle guide plate is arranged on the side of the surface of the baffle base plate. The socket cavity is formed on the side of the baffle guide plate. The baffle guide plate is nested and connected with the surface of the connecting piece through the socket cavity. The second mounting hole is formed through the edge of the surface of the baffle guide plate. The second mounting hole longitudinally penetrates through the socket cavity. The number of the second mounting holes is the same as that of the first mounting holes and their positions are distributed correspondingly. The anti-impingement mechanism is arranged at the upper and lower ends of the surface of the heat exchange tube bundle.

[0006] Preferably, the baffle base plate, the connecting piece and the baffle guide plate are integrally made of copper alloy material.

[0007] Preferably, insertion strips are integrally arranged on both the front and back surfaces of the connecting piece, and insertion grooves are symmetrically arranged on the upper and lower surfaces of the socket cavity. During the socket connection process of the connecting piece and the socket cavity, the insertion strips will also be inserted and connected with the insertion grooves.

[0008] Preferably, the baffle mechanism further comprises fin seats and mounting sleeves. The fin seats are attached to both the front and back surfaces of the baffle guide plate. The mounting sleeves are welded to the edges of the fin seats. The number of the mounting sleeves is the same as that of the second mounting holes and their positions are distributed correspondingly. The first mounting holes, the second mounting holes and the mounting sleeves are penetrated and locked by bolt parts.

[0009] Preferably, the fin seats on both the front and back surfaces of the baffle guide plate can be independently disassembled.

[0010] Preferably, a heat conduction patch is pasted and laid on the surface of the fin seat facing the baffle guide plate. The heat conduction patch is made of silicone grease material.

[0011] Preferably, the fin pitch of the fin seat is 6-12mm.

[0012] Preferably, the anti-impact mechanism includes a connecting seat, a second socket hole, a guard plate, a telescopic sleeve and an elastic folding member. Connecting seats are provided at both the upper and lower ends of the surface of the heat exchange tube bundle, and the two groups of connecting seats correspond to the positions of the hot liquid inlet and the hot liquid outlet respectively. A second socket hole is penetratingly provided on the surface of the connecting seat, and the connecting seat is sleeved and fixedly installed on the surface of the heat exchange tube bundle through the second socket hole. Guard plates are symmetrically arranged on the left and right sides of the connecting seat, telescopic sleeves are symmetrically installed in the middle of the left and right sides of the connecting seat, and the telescopic shafts at the ends of the telescopic sleeves are fixedly installed with the guard plates. Elastic folding members are symmetrically installed on the front and rear sides of the guard plate, the elastic folding members are in a V shape, and the other ends of the elastic folding members are fixedly installed with the connecting seat.

[0013] Preferably, the outer surface of the guard plate is of a streamlined structure.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, a baffle mechanism is provided in the middle section of the surface of the heat exchange tube bundle. By removing the connecting bolts of the first mounting hole and the second mounting hole, the socket cavity can be detached from the surface of the connecting piece. Subsequently, a new baffle guide plate is nested on the surface of the connecting piece through the socket cavity, and then the first mounting hole and the second mounting hole are penetrated and locked with bolts, thereby completing the replacement of the baffle guide plate. The split structure has simple replacement operation and low cost, which can reduce the later maintenance pressure of the equipment. In addition, the baffle substrate and the baffle guide plate not only play a role in adjusting the flow direction, but also their excellent heat conduction characteristics can help the heat exchange tube bundle and the fluid achieve more efficient heat exchange.

[0015] In the present invention, fin seats are provided on the surface of the baffle guide plate. The fin seats are installed and connected to the baffle guide plate by bolts penetrating through the mounting sleeve and the second mounting hole. By expanding the heat exchange area between the baffle guide plate and the fluid through the fin seats, the heat exchange efficiency of the heat exchange tube bundle can be further improved.

[0016] In the present invention, anti-impact mechanisms are provided at both ends of the surface of the heat exchange tube bundle. The connecting seat and the guard plate are movably connected by a telescopic sleeve, providing a certain movable buffer distance for the guard plate. When the guard plate is impacted by the fluid, the guard plate is forced towards the connecting seat, and at the same time, the elastic folding member is compressed to absorb the impact pressure transmitted from the guard plate, having a better buffer and protection effect, which can effectively reduce the impact force transmitted to the heat exchange tube bundle and ensure the long-term use of the heat exchange tube bundle. Brief Description of the Drawings

[0017] Figure 1 It is a schematic front view structure diagram of the whole of the present invention.

[0018] Figure 2 It is a schematic front view sectional structure diagram of the whole of the present invention.

[0019] Figure 3 It is a schematic front view sectional structure diagram of the tube box of the present invention.

[0020] Figure 4 This is a schematic diagram of the local structure of the heat exchange tube bundle in the present invention.

[0021] Figure 5 This is a schematic diagram of the baffle mechanism structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the baffle substrate structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the baffle guide plate structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the fin seat structure of the present invention.

[0025] Figure 9 This is a top view structure schematic diagram of the anti-impact mechanism in the present invention.

[0026] Figure 10 This is a schematic diagram of the stress state of the anti-impact mechanism in the present invention.

[0027] In the figure: shell - 1, hot liquid inlet - 2, hot liquid outlet - 3, tube box - 4, cold liquid inlet - 5, cold liquid outlet - 6, heat exchange tube bundle - 7, baffle mechanism - 8, baffle substrate - 81, first sleeve hole - 82, connecting piece - 83, insertion strip - 83a, first installation hole - 84, baffle guide plate - 85, socket cavity - 86, insertion slot - 86a, second installation hole - 87, fin seat - 88, installation sleeve - 89, heat conduction patch - 810, anti-impact mechanism - 9, connecting seat - 91, second sleeve hole - 92, guard plate - 93, telescopic sleeve - 94, elastic folding member - 95. Specific embodiments

[0028] In order to further explain the technical solution of the present invention, the following will be elaborated in detail through specific embodiments.

[0029] Please refer to Figure 1-3 , the present invention provides a high-temperature tubular heat exchanger, including a shell 1, a hot liquid inlet 2, a hot liquid outlet 3, a tube box 4, a cold liquid inlet 5, a cold liquid outlet 6, a heat exchange tube bundle 7, a baffle mechanism 8 and an anti-impact mechanism 9. The hot liquid inlet 2 is provided at the lower left end of the shell 1, the hot liquid outlet 3 is provided at the upper right end of the shell 1, a tube box 4 is flange-mounted at the top port of the shell 1, the cold liquid inlet 5 is provided on the left side of the tube box 4, the cold liquid outlet 6 is provided on the right side of the tube box 4, the cold liquid inlet 5 and the cold liquid outlet 6 are separated independently by a partition, the heat exchange tube bundle 7 is installed at the bottom of the tube box 4, the head end of the heat exchange tube bundle 7 is communicated with the cold liquid inlet 5, the tail end of the heat exchange tube bundle 7 is communicated with the cold liquid outlet 6, the shell 1 is sleeved and installed outside the heat exchange tube bundle 7, the baffle mechanism 8 is arranged in the middle section of the surface of the heat exchange tube bundle 7, and the anti-impact mechanisms 9 are arranged at the upper and lower ends of the surface of the heat exchange tube bundle 7.

[0030] During use, the cold fluid enters the left part of the tube box 4 from the cold liquid inlet 5, then turns to enter the right part of the tube box 4 through the heat exchange tube bundle 7, and finally discharges the tube box 4 through the cold liquid outlet 6. The hot fluid enters the shell 1 from the hot liquid inlet 2, allowing the hot fluid to exchange heat with the cold fluid across the heat exchange tube bundle 7, and finally discharges the shell 1 through the hot liquid outlet 3, thereby realizing the heat exchange process.

[0031] See also Figure 4-7 The present invention provides a high-temperature tubular heat exchanger, wherein the baffle mechanism 8 comprises a baffle substrate 81, a first sleeve hole 82, a connecting piece 83, a first mounting hole 84, a baffle guide plate 85, a sleeve cavity 86 and a second mounting hole 87. The baffle substrate 81 is arranged in the middle section of the surface of the heat exchange tube bundle 7, and the first sleeve hole 82 is provided on the surface of the baffle substrate 81. The baffle substrate 81 is sleeved and fixed with the outer part of the heat exchange tube bundle 7 through the first sleeve hole 82. The side edge of the surface of the baffle substrate 81 is integrally provided with a connecting piece. 83, a No. 1 mounting hole 84 is provided through the edge of the surface of the connecting piece 83, a deflection guide plate 85 is provided on the side of the surface of the deflection substrate 81, a sleeve cavity 86 is opened on the side of the deflection guide plate 85, the deflection guide plate 85 is nested and connected with the surface of the connecting piece 83 through the sleeve cavity 86, a No. 2 mounting hole 87 is provided through the edge of the surface of the deflection guide plate 85, the No. 2 mounting hole 87 passes through the sleeve cavity 86 longitudinally, and the number of the No. 2 mounting holes 87 is the same as that of the No. 1 mounting holes 84 and their position distribution corresponds.

[0032] A deflection mechanism 8 is set in the middle section of the surface of the heat exchange tube bundle 7. The deflection mechanism 8 is a split structure. The deflection guide plate 85, as the outer edge structure of the deflection substrate 81, undertakes the main deflection function, which makes the deflection guide plate 85 relatively easy to wear. After the deflection guide plate 85 is worn out, it is only necessary to remove the connecting bolts between the No. 1 mounting hole 84 and the No. 2 mounting hole 87 to remove the sleeve cavity 86 from the surface of the connecting plate 83, and then the new deflection guide plate 85 is nested on the surface of the connecting plate 83 through the sleeve cavity 86, and then the No. 1 mounting hole 84 and the No. 2 mounting hole 87 are inserted and locked with bolts to complete the replacement of the deflection guide plate 85. The replacement is simple and low in cost, which can reduce the later maintenance pressure of the equipment. In addition, the deflection substrate 81 and the deflection guide plate 85 not only play the role of regulating the flow direction, but their own excellent thermal conductivity characteristics can also help the heat exchange tube bundle 7 and the fluid to achieve more efficient heat exchange.

[0033] It is further explained that the deflection base plate 81, the connecting plate 83 and the deflection guide plate 85 are made of copper alloy as a whole. The copper alloy material has excellent thermal conductivity and corrosion resistance, so that the deflection mechanism 8 not only plays a role in regulating the flow direction, but its own excellent thermal conductivity can also help the heat exchange tube bundle 7 and the fluid to achieve more efficient heat exchange.

[0034] Furthermore, insertion strips 83a are integrally provided on both the front and back sides of the connecting piece 83, and insertion grooves 86a are symmetrically provided on the upper and lower sides of the socket cavity 86. During the socketing process of the connecting piece 83 and the socket cavity 86, the insertion strips 83a will also be inserted and connected with the insertion grooves 86a. Through the structural cooperation of the insertion strips 83a and the insertion grooves 86a, the contact area between the baffle substrate 81 and the baffle guide plate 85 can be increased, ensuring the heat conduction efficiency. At the same time, the connection strength between the baffle substrate 81 and the baffle guide plate 85 can be further enhanced, and it is not easy to shake due to unstable connection.

[0035] Please refer to Figure 8 , the present invention provides a high-temperature tubular heat exchanger. The baffle mechanism 8 further includes a fin seat 88 and a mounting sleeve 89. Fin seats 88 are attached to both the front and back sides of the baffle guide plate 85. Mounting sleeves 89 are welded to the edges of the fin seats 88. The number of the mounting sleeves 89 is the same as that of the second mounting holes 87 and their positions are correspondingly distributed. Bolts are inserted through the first mounting holes 84, the second mounting holes 87 and the mounting sleeves 89 for locking, so as to bolt-lock the fin seats 88 on the surface of the baffle guide plate 85. The fin seats 88 can expand the heat exchange area between the baffle guide plate 85 and the fluid, thereby further improving the heat exchange efficiency.

[0036] The fin seat 88 can be bolted and locked with the second mounting hole 87 through the mounting sleeve 89 to realize the installation connection between the fin seat 88 and the baffle guide plate 85. By expanding the heat exchange area between the baffle guide plate 85 and the fluid through the fin seat 88, the heat exchange efficiency of the heat exchange tube bundle 7 can be further improved.

[0037] Furthermore, the fin seats 88 on both the front and back sides of the baffle guide plate 85 can be independently disassembled, and users can select and install the fin seats 88 according to actual needs, with strong applicability.

[0038] Furthermore, a heat conduction patch 810 is pasted and laid on the surface of the fin seat 88 facing the baffle guide plate 85. The heat conduction patch 810 is made of silicone grease material. The heat conduction patch 810 can fill the connection gap between the baffle guide plate 85 and the fin seat 88 to ensure the heat conduction efficiency.

[0039] Furthermore, the fin pitch of the fin seat 88 is 6 - 12 mm, avoiding excessive fluid resistance caused by overly dense fins.

[0040] Please refer to Figure 9-10, the present invention provides a high-temperature tubular heat exchanger. The impact prevention mechanism 9 includes a connecting seat 91, a second sleeve hole 92, a guard plate 93, a telescopic sleeve 94, and an elastic folding member 95. Connecting seats 91 are provided at both the upper and lower ends of the surface of the heat exchange tube bundle 7. The two groups of connecting seats 91 are respectively directly corresponding to the positions of the hot liquid inlet 2 and the hot liquid outlet 3. A second sleeve hole 92 is provided through the surface of the connecting seat 91. The connecting seat 91 is sleeved and fixedly installed on the surface of the heat exchange tube bundle 7 through the second sleeve hole 92. Guard plates 93 are symmetrically arranged on the left and right sides of the connecting seat 91. Telescopic sleeves 94 are symmetrically installed in the middle of the left and right sides of the connecting seat 91. The telescopic shaft at the end of the telescopic sleeve 94 is fixedly installed with the guard plate 93, providing a certain telescopic buffer distance for the guard plate 93. Elastic folding members 95 are symmetrically installed on the front and rear sides of the guard plate 93. The elastic folding members 95 are in a V shape, and the other ends of the elastic folding members 95 are fixedly installed with the connecting seat 91.

[0041] The connecting seat 91 and the guard plate 93 are movably connected by the telescopic sleeve 94, providing a certain moving buffer distance for the guard plate 93. When the guard plate 93 is impacted by the fluid, the guard plate 93 is forced towards the connecting seat 91. At the same time, the elastic folding member 95 is forced to compress and absorb the impact pressure transmitted from the guard plate 93, having a better buffer protection effect, and can effectively reduce the impact force transmitted to the heat exchange tube bundle 7, ensuring the long-term use of the heat exchange tube bundle 7.

[0042] Further explanation, the outer surface of the guard plate 93 is a streamline structure to reduce the fluid impact resistance received by the guard plate 93 and further improve the impact protection performance.

[0043] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature tubular heat exchanger, comprising a shell (1), a hot liquid inlet (2), a hot liquid outlet (3), a tube box (4), a cold liquid inlet (5), a cold liquid outlet (6) and a heat exchange tube bundle (7), wherein the shell (1) is provided with a hot liquid inlet (2) at the lower left end, the shell (1) is provided with a hot liquid outlet (3) at the upper right end, a tube box (4) is flange-mounted at the top port of the shell (1), the tube box (4) is provided with a cold liquid inlet (5) at the left side, the tube box (4) is provided with a cold liquid outlet (6) at the right side, the cold liquid inlet (5) and the cold liquid outlet (6) are separated and independent by a partition, a heat exchange tube bundle (7) is mounted at the bottom of the tube box (4), the head end of the heat exchange tube bundle (7) is connected to the cold liquid inlet (5), the tail end of the heat exchange tube bundle (7) is connected to the cold liquid outlet (6), and the shell (1) is sleeved and mounted on the outside of the heat exchange tube bundle (7); Features: The heat exchange tube bundle (7) also includes a baffle mechanism (8) and an anti-collision mechanism (9). The baffle mechanism (8) is arranged in the middle section of the surface of the heat exchange tube bundle (7). The baffle mechanism (8) includes a baffle substrate (81), a No. 1 sleeve hole (82), a connecting piece (83), a No. 1 mounting hole (84), a baffle guide plate (85), a sleeve cavity (86) and a No. 2 mounting hole (87). The baffle substrate (81) is arranged in the middle section of the surface of the heat exchange tube bundle (7). The No. 1 sleeve hole (82) is provided on the surface of the baffle substrate (81). The baffle substrate (81) is sleeved and fixed to the outside of the heat exchange tube bundle (7) through the No. 1 sleeve hole (82). The side edge of the surface of the baffle substrate (81) is integrally provided with a connecting piece. The connecting plate (83) is provided with a first mounting hole (84) on the edge of the surface of the connecting plate (83); a baffle guide plate (85) is provided on the side of the surface of the baffle base plate (81); a sleeve cavity (86) is provided on the side of the baffle guide plate (85); the baffle guide plate (85) is connected to the surface of the connecting plate (83) through the sleeve cavity (86); a second mounting hole (87) is provided on the edge of the surface of the baffle guide plate (85); the second mounting hole (87) passes through the sleeve cavity (86) longitudinally; the number of the second mounting holes (87) is the same as that of the first mounting holes (84) and their position distribution corresponds; and anti-collision mechanisms (9) are provided at the upper and lower ends of the surface of the heat exchange tube bundle (7).

2. A high temperature tubular heat exchanger according to claim 1, characterized in that: The baffle base plate (81), the connecting piece (83) and the baffle guide plate (85) are made entirely of copper alloy.

3. A high temperature tubular heat exchanger according to claim 1, characterized in that: The connecting piece (83) is integrally provided with plug-in strips (83a) on both the front and back sides, and the sleeve cavity (86) is symmetrically provided with plug-in grooves (86a) on the upper and lower sides. During the sleeve connection process of the connecting piece (83) and the sleeve cavity (86), the plug-in strips (83a) are also plugged and connected with the plug-in grooves (86a).

4. A high temperature tubular heat exchanger according to claim 1, characterized in that: The deflector mechanism (8) further comprises a fin seat (88) and a mounting sleeve (89); the fin seat (88) is fitted on both the front and back sides of the deflector guide plate (85); the mounting sleeve (89) is welded to the edge of the fin seat (88); the number of the mounting sleeves (89) and the number two mounting holes (87) are the same and their position distribution corresponds; the number one mounting hole (84), the number two mounting hole (87) and the mounting sleeve (89) are interlaced and locked by bolts.

5. A high temperature tubular heat exchanger according to claim 4, characterized in that: The fin seats (88) on both the front and back sides of the baffle guide plate (85) can be independently disassembled.

6. A high temperature tubular heat exchanger according to claim 4, characterized in that: A heat-conducting patch (810) is pasted and laid on one side of the fin seat (88) facing the baffle guide plate (85), and the heat-conducting patch (810) is made of silicone grease.

7. A high temperature tubular heat exchanger according to claim 4, characterized in that: The fin spacing of the fin seat (88) is 6-12 mm.

8. The high temperature tube heat exchanger according to claim 1, characterized in that: The anti-collision mechanism (9) comprises a connection seat (91), a No. 2 sleeve hole (92), a guard plate (93), a telescopic sleeve (94) and an elastic folding member (95). The connection seats (91) are provided at both upper and lower ends of the surface of the heat exchange tube bundle (7). The two groups of connection seats (91) correspond to the positions of the hot liquid inlet (2) and the hot liquid outlet (3) respectively. The surface of the connection seat (91) is provided with a No. 2 sleeve hole (92) through which the connection seat (91) is sleeved and fixed on the surface of the heat exchange tube bundle (7) through the No. 2 sleeve hole (92). The left and right sides of the connection seat (91) are symmetrically provided with guard plates (93). The middle parts of the left and right sides of the connection seat (91) are symmetrically provided with telescopic sleeves (94). The telescopic shaft at the end of the telescopic sleeve (94) is fixedly installed on the guard plate (93). The front and rear sides of the guard plate (93) are symmetrically provided with elastic folding members (95). The elastic folding members (95) are V-shaped. The other end of the elastic folding member (95) is fixedly installed on the connection seat (91).

9. A high temperature tube heat exchanger according to claim 8, characterized in that: The outer surface of the guard plate (93) is a streamlined structure.

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