A space vertically staggered U-tube heat exchanger

Abstract

The utility model relates to a kind of U-shaped tube heat exchangers of space vertical staggered, including shell, front pipe box and U-shaped heat exchange tube bundle, the inside of shell is misaligned with multiple baffle plates along its length direction, U-shaped heat exchange tube bundle is fixed on multiple baffle plates, multiple hook structures are provided on shell, multiple lock catch structures are provided on front pipe box and cooperate with multiple hook structures, when front pipe box is close to shell and make multiple hook structures and multiple lock catch structures align, rotate a certain angle by external force to drive front pipe box, multiple hook structures and multiple lock catch structures will interact at this time, to connect shell and front pipe box quickly, the utility model, by setting hook structure on shell, setting lock catch structure on front pipe box, only need to rotate front pipe box a certain angle to realize quick connection, when unlocking, only need to use pin tool to remove locking state, simplify operation process, improve the efficiency of installation and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a U-shaped tube heat exchanger with vertically interlaced tubes. Background Technology

[0002] In industrial production, heat exchangers are widely used in various processes, their main function being to achieve heat exchange between two or more fluids. U-tube heat exchangers, due to their compact structure, high heat transfer efficiency, and strong adaptability, are widely used in petrochemical, energy, and food processing industries. However, existing U-tube heat exchangers present some problems in installation, maintenance, and sealing that urgently need to be addressed.

[0003] Current heat exchangers have some shortcomings. Traditional U-tube heat exchangers typically use multiple bolts to fix the shell and front tube box together. This connection method requires tightening or loosening each bolt individually during installation and disassembly, which is cumbersome and inefficient. Especially in large heat exchangers, the large number of bolts makes installation and disassembly time-consuming and labor-intensive, seriously affecting the efficiency of equipment maintenance and repair.

[0004] In practical use, bolts are exposed to complex industrial environments for extended periods, making them prone to corrosion and rust. Corroded bolts are not only difficult to disassemble but may also break, increasing the difficulty and cost of equipment maintenance.

[0005] During installation, tightening the bolts sequentially along the circumference may cause uneven compression of the sealing ring, leading to it lifting or shifting. This deformation of the sealing ring will compromise the sealing effect, creating a risk of leakage and affecting the normal operation of the equipment. Utility Model Content

[0006] The purpose of this invention is to provide a U-shaped tube heat exchanger with vertically intersecting tubes in space to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A U-shaped tube heat exchanger with vertically intersecting tubes includes a shell, a front tube box, and a U-shaped heat exchange tube bundle. Multiple baffles are staggered along the length of the shell, and the U-shaped heat exchange tube bundle is fixed to the multiple baffles.

[0009] The housing is provided with multiple hook structures, and the front tube box is provided with multiple locking structures that cooperate with the multiple hook structures. When the front tube box moves closer to the housing and the multiple hook structures and multiple locking structures are aligned, the front tube box is rotated by an external force at a certain angle. At this time, the multiple hook structures and multiple locking structures will interact with each other, thereby quickly connecting the housing and the front tube box. When unlocking, the locking state between the multiple hook structures and multiple locking structures can be quickly released using a pin tool.

[0010] As a further embodiment of this utility model:

[0011] The hook structure includes a ring and a hook. The ring is coaxially fixedly sleeved on the housing, and the hook is located on the side of the ring away from the housing.

[0012] A sealing ring is detachably installed on the side of the ring away from the housing, and the sealing ring is concentrically arranged with the ring.

[0013] As a further improvement of this utility model:

[0014] The hook includes an inclined section and a straight section connected at one end, the other end of the inclined section is connected to the side wall of the ring, and the other end of the straight section is provided with a trapezoidal locking block;

[0015] The straight section has a notch on the side closer to the ring, and a slot on the side farther from the ring, with the slot communicating with the notch.

[0016] As a further improvement of this utility model:

[0017] The locking structure includes a collar, a slider, and a guide rod, with the collar coaxially and fixedly sleeved on the front tube box;

[0018] The collar has a slot on the side away from the front tube box. The slot includes an inlet / outlet slot and a fitting slot, which are connected to each other. The hook can enter the slot through the inlet / outlet slot. The fitting slot is adapted to the hook. When the hook rotates and slides from the inlet / outlet slot into the fitting slot, the fitting slot will engage with the hook, making the ring and collar inseparable.

[0019] As a further improvement of this utility model:

[0020] The collar is provided with a sliding groove and a receiving groove, and the sliding groove is connected to the fitting groove and the receiving groove respectively.

[0021] The slider is slidably disposed in the groove, the guide rod is disposed in the receiving groove, one end of the slider is provided with a bevel, and the other end is provided with an inset opening, and the trapezoidal block is adapted to the bevel and the inset opening respectively.

[0022] As a further improvement of this utility model:

[0023] A Z-shaped rod is slidably provided on the outer wall of the guide rod. The Z-shaped rod is connected to the slider. A spring is sleeved on the outer wall of the guide rod. The two ends of the spring abut against the Z-shaped rod and the inner wall of the receiving groove, respectively, so as to drive the slider to always have a tendency to move closer to the hook.

[0024] When the hook slides from the inlet / outlet slot into the fitting slot, the inclined surface of the trapezoidal block will first abut against the oblique cut, causing the slider to slide and avoid obstacles within the groove. During this process, the Z-shaped rod will follow the slider to compress the spring. When the trapezoidal block continues to move and aligns with the inner opening, the spring will drive the slider to reset, so that the inner opening and the trapezoidal block are engaged, meaning the hook cannot be moved out of the fitting slot.

[0025] The collar has a disassembly hole, which corresponds to the slot. When disassembling, one end of the pin is inserted through the disassembly hole and the slot to the notch, and then the slider is pushed to slide, so that the inner opening and the trapezoidal block are separated.

[0026] As a further improvement of this utility model:

[0027] The housing is respectively connected to a cold medium inlet pipe and a cold medium outlet pipe. The cold medium inlet pipe is located at the bottom of the housing at the end away from the front pipe box, and the cold medium outlet pipe is located at the top of the housing at the end closer to the front pipe box.

[0028] The outer wall of the front tube box is symmetrically connected with a heat medium inlet pipe and a heat medium outlet pipe. The interior of the front tube box is horizontally equipped with a head baffle, which separates the two ends of the U-shaped heat exchange tube bundle.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] By incorporating a hook structure on the housing and a locking structure on the front tube box, quick connection can be achieved simply by rotating the front tube box at a certain angle. Unlocking is also achieved using only a pin tool, simplifying the operation process, improving installation and disassembly efficiency, and saving significant time and labor costs. The bolt connection method is eliminated, and the combination of hooks and locks fundamentally solves the disassembly problem caused by bolt corrosion. The connection method eliminates the need for sequential bolt tightening, preventing uneven stress on the sealing ring during installation, which could lead to warping or displacement. This enhances the sealing performance between the housing and the front tube box, ensuring reliable sealing during equipment operation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of one embodiment of a U-shaped tube heat exchanger with vertically intersecting tubes in space.

[0032] Figure 2 This is a cross-sectional view of the collar in one embodiment of a U-shaped tube heat exchanger with vertically intersecting tubes in space.

[0033] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0034] Figure 4 This is a cross-sectional view of the shell and front tube box in one embodiment of a U-shaped tube heat exchanger with vertically intersecting tubes in space.

[0035] Figure 5 for Figure 4 Enlarged view of section B in the middle.

[0036] Figure 6 This is a cross-sectional view of the annulus and collar in one embodiment of a U-shaped tube heat exchanger with vertically intersecting tubes in space.

[0037] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0038] Figure 8 This is a schematic diagram showing the shell and front tube box of one embodiment of a U-shaped tube heat exchanger with vertically intersecting tubes in space.

[0039] In the diagram: 1. Shell; 101. Cold medium inlet pipe; 102. Cold medium outlet pipe; 2. Front tube box; 201. Hot medium inlet pipe; 202. Hot medium outlet pipe; 203. Head baffle; 3. U-shaped heat exchanger tube bundle; 4. Baffle plate; 5. Ring; 6. Hook; 601. Inclined section; 602. Straight section; 6021. Trapezoidal locking block; 6022. Notch; 6023. Slot; 7. Sealing ring; 8. Collar; 801. Slot; 8011. Inlet / outlet slot; 8012. Fitting slot; 802. Sliding groove; 803. Receiving slot; 804. Disassembly hole; 9. Sliding block; 901. Angled cut; 902. Inner groove; 10. Guide rod; 11. Z-shaped rod; 12. Spring. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] Please see Figures 1-8 In this embodiment of the utility model, a U-shaped tube heat exchanger with vertically intersecting space includes a shell 1, a front tube box 2 and a U-shaped heat exchange tube bundle 3. Multiple baffles 4 are staggered along the length of the shell 1 inside, and the U-shaped heat exchange tube bundle 3 is fixed on the multiple baffles 4.

[0043] The housing 1 is provided with multiple protruding hook structures, and the front tube box 2 is provided with multiple locking structures that cooperate with the multiple protruding hook structures. When the front tube box 2 moves closer to the housing 1 and the multiple protruding hook structures and the multiple locking structures are aligned, the front tube box 2 is rotated by an external force at a certain angle. At this time, the multiple protruding hook structures and the multiple locking structures will interact with each other, thereby quickly connecting the housing 1 and the front tube box 2. When unlocking, the locking state between the multiple protruding hook structures and the multiple locking structures can be quickly released using a pin tool.

[0044] In this scheme, firstly, the front tube box 2 is brought closer to the shell 1, so that the multiple locking structures on the front tube box 2 are aligned with the multiple protruding hook structures on the shell 1. This process requires precise operation to ensure that each locking structure can accurately correspond to the corresponding protruding hook structure. After the protruding hook structure and the locking structure are aligned, the front tube box 2 is rotated by a certain angle with the help of external force, such as manual operation or the use of special tools. As the front tube box 2 rotates, the locking structure will gradually interact with the protruding hook structure, and finally realize the rapid connection between the shell 1 and the front tube box 2. This connection method does not require tightening the bolts one by one as in traditional bolt connections, which greatly improves the installation efficiency. When the locking structure and the protruding hook structure are fully engaged, the shell 1 and the front tube box 2 are firmly connected together to form a complete heat exchanger structure. At this time, the U-shaped heat exchange tube bundle 3 is also fixed inside the shell 1 by the baffle 4, and the entire heat exchanger is in an operational state.

[0045] When maintenance or repair of the heat exchanger is required, the connection between the shell 1 and the front tube box 2 must first be unlocked. At this time, a special pin tool is used to insert into a specific position between the locking structure and the hook structure. By operating the pin tool, the locking state between the locking structure and the hook structure is quickly released. This process is simple and quick, without the need to loosen the bolts one by one as in traditional bolt connections, which greatly improves disassembly efficiency. After the locking state is released, the connection between the front tube box 2 and the shell 1 is released, and the front tube box 2 can be easily separated from the shell 1, thereby facilitating the inspection, repair or replacement of the U-shaped heat exchange tube bundle 3 and other components inside the heat exchanger.

[0046] As a further embodiment of this utility model, the protruding hook structure includes a ring 5 and a hook 6. The ring 5 is coaxially fixedly sleeved on the housing 1, and the hook 6 is disposed on the side of the ring 5 away from the housing 1.

[0047] A sealing ring 7 is detachably installed on the side of the ring 5 away from the housing 1, and the sealing ring 7 is concentrically arranged with the ring 5.

[0048] The hook 6 includes an inclined section 601 and a straight section 602 connected at one end. The other end of the inclined section 601 is connected to the side wall of the ring 5. The other end of the straight section 602 is provided with a trapezoidal locking block 6021.

[0049] The straight section 602 has a notch 6022 on the side close to the ring 5, and a slot 6023 on the side away from the ring 5. The slot 6023 is connected to the notch 6022.

[0050] In this embodiment, the front tube box 2 is brought closer to the housing 1 so that the locking structure on the front tube box 2 is aligned with the protruding hook structure on the housing 1. At this time, the corresponding part of the locking structure needs to be aligned with the trapezoidal locking block 6021.

[0051] With the help of external force, the front tube box 2 is rotated at a certain angle. During the rotation, the locking structure gradually interacts with the trapezoidal block 6021. Due to the special shape of the trapezoidal block 6021, the locking structure will gradually lock into the space between the trapezoidal block 6021 and the straight section 602. At the same time, the hook 6 may undergo a certain elastic deformation to adapt to the insertion of the locking structure.

[0052] When the locking structure is fully engaged in the space between the trapezoidal block 6021 and the straight section 602, the elastic deformation of the hook 6 is restored, and the locking structure and the trapezoidal block 6021 are tightly fitted together to achieve a quick connection between the housing 1 and the front tube box 2. At this time, the sealing ring 7 plays a sealing role between the ring 5 and the front tube box 2 to ensure the sealing performance of the connection.

[0053] As a further embodiment of this utility model, the locking structure includes a collar 8, a slider 9, and a guide rod 10, wherein the collar 8 is coaxially and fixedly sleeved on the front tube box 2;

[0054] The collar 8 has a slot 801 on the side away from the front tube box 2. The slot 801 includes an inlet / outlet slot 8011 and a fitting slot 8012. The inlet / outlet slot 8011 and the fitting slot 8012 are interconnected, and the hook 6 can enter the slot 801 through the inlet / outlet slot 8011. The fitting slot 8012 is adapted to the hook 6. When the hook 6 rotates and slides from the inlet / outlet slot 8011 into the fitting slot 8012, the fitting slot 8012 will engage with the hook 6, making the ring 5 and the collar 8 inseparable.

[0055] The collar 8 is provided with a sliding groove 802 and a receiving groove 803 respectively, and the sliding groove 802 is connected to the fitting groove 8012 and the receiving groove 803 respectively.

[0056] The slider 9 is slidably disposed in the groove 802, the guide rod 10 is disposed in the receiving groove 803, one end of the slider 9 is provided with a bevel 901, and the other end is provided with an inset 902, and the trapezoidal block 6021 is adapted to the bevel 901 and the inset 902 respectively;

[0057] A Z-shaped rod 11 is slidably provided on the outer wall of the guide rod 10. The Z-shaped rod 11 is connected to the slider 9. A spring 12 is sleeved on the outer wall of the guide rod 10. The two ends of the spring 12 abut against the Z-shaped rod 11 and the inner wall of the receiving groove 803, respectively, so as to drive the slider 9 to always have a tendency to move closer to the hook 6.

[0058] When the hook 6 slides from the inlet / outlet slot 8011 into the fitting slot 8012, the inclined surface of the trapezoidal locking block 6021 will first abut against the oblique cut 901, causing the slider 9 to slide and avoid obstacles within the sliding groove 802. During this process, the Z-shaped rod 11 will follow the slider 9 to compress the spring 12. When the trapezoidal locking block 6021 continues to move and aligns with the inner fitting 902, the spring 12 will drive the slider 9 to reset, so that the inner fitting 902 and the trapezoidal locking block 6021 are engaged, meaning the hook 6 cannot be moved out of the fitting slot 8012.

[0059] The collar 8 has a disassembly hole 804, which corresponds to the slot 6023. When disassembling, one end of the pin is inserted through the disassembly hole 804 and the slot 6023 respectively and extended into the notch 6022. Then the slider 9 is pushed to slide, so that the inner hole 902 and the trapezoidal block 6021 are separated.

[0060] In this embodiment, the front tube box 2 is brought closer to the housing 1 so that the locking structure on the front tube box 2 is aligned with the protruding hook structure on the housing 1.

[0061] Ensure that the inlet / outlet groove 8011 on the collar 8 is aligned with the trapezoidal locking block 6021 of the hook 6. At this time, the trapezoidal locking block 6021 of the hook 6 is located at the entrance of the inlet / outlet groove 8011.

[0062] With the help of external force, the front tube box 2 is rotated at a certain angle. During the rotation, the trapezoidal locking block 6021 of the hook 6 gradually enters the locking groove 801 of the collar 8. When the inclined surface of the trapezoidal locking block 6021 abuts against the oblique cut 901 of the slider 9, the slider 9 slides in the sliding groove 802 to avoid it. During this process, the Z-shaped rod 11 moves with the slider 9 and compresses the spring 12.

[0063] When the trapezoidal locking block 6021 continues to move and aligns with the inner slot 902 of the slider 9, the spring 12 releases its elastic potential energy, causing the slider 9 to reset; the inner slot 902 of the slider 9 engages with the trapezoidal locking block 6021, at which point the hook 6 cannot be removed from the fitting groove 8012, and the front tube box 2 and the housing 1 are firmly locked.

[0064] At this time, the front tube box 2 and the housing 1 are tightly connected by the cooperation of the locking structure and the hook structure. The sealing ring 7 plays a sealing role between the ring 5 and the collar 8, ensuring the sealing performance of the connection.

[0065] When the heat exchanger enters normal operation, the fluid enters the U-shaped heat exchange tube bundle 3 through the front tube box 2 and exchanges heat with the fluid in the shell 1.

[0066] When it is necessary to disassemble the front tube box 2, use a pin tool to insert one end of the pin through the disassembly hole 804 on the collar 8 and the slot 6023 on the hook 6, extending into the notch 6022; push the slider 9 to slide, so that the inner opening 902 of the slider 9 separates from the trapezoidal block 6021; the locking state of the latch structure and the hook structure is released, and the front tube box 2 can be easily separated from the housing 1.

[0067] As a further embodiment of this utility model, a cold medium inlet pipe 101 and a cold medium outlet pipe 102 are respectively connected and disposed on the housing 1. The cold medium inlet pipe 101 is located at the bottom of the housing 1 at the end away from the front pipe box 2, and the cold medium outlet pipe 102 is located at the top of the housing 1 at the end close to the front pipe box 2.

[0068] The outer wall of the front tube box 2 is symmetrically connected with a heat medium inlet pipe 201 and a heat medium outlet pipe 202. The interior of the front tube box 2 is horizontally provided with a head baffle 203, which separates the two ends of the U-shaped heat exchange tube bundle 3.

[0069] In this embodiment, the cold medium enters from the cold medium inlet pipe 101 at the bottom of the shell 1, flows upward inside the shell 1, is guided by the baffle plate 4, changes direction multiple times, and fully contacts the U-shaped heat exchange tube bundle 3 for heat exchange; the cold medium after heat exchange is discharged from the cold medium outlet pipe 102 at the top of the shell 1.

[0070] The heat medium enters from the heat medium inlet pipe 201 at the top of the front tube box 2. The heat medium is guided by the end cap 203 and flows into the U-shaped heat exchange tube bundle 3 to exchange heat with the cold medium outside the tube. The heat medium after heat exchange is discharged from the heat medium outlet pipe 202 at the bottom of the front tube box 2.

[0071] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spatially vertically interlaced U-shaped tube heat exchanger, comprising a shell (1), a front tube box (2), and a U-shaped heat exchange tube bundle (3), characterized in that, The shell (1) has multiple baffles (4) staggered along its length, and the U-shaped heat exchange tube bundle (3) is fixed on the multiple baffles (4); The housing (1) is provided with a plurality of protruding hook structures, and the front tube box (2) is provided with a plurality of locking structures that cooperate with the plurality of protruding hook structures. When the front tube box (2) moves closer to the housing (1) and the plurality of protruding hook structures and the plurality of locking structures are aligned, the front tube box (2) is rotated by an external force at a certain angle. At this time, the plurality of protruding hook structures and the plurality of locking structures will interact with each other, thereby quickly connecting the housing (1) and the front tube box (2). When unlocking, the locking state between the plurality of protruding hook structures and the plurality of locking structures can be quickly released by using a pin tool.

2. The U-shaped tube heat exchanger with vertically interlaced tubes according to claim 1, characterized in that, The hook structure includes a ring (5) and a hook (6). The ring (5) is coaxially fixedly sleeved on the housing (1), and the hook (6) is located on the side of the ring (5) away from the housing (1). A sealing ring (7) is detachably installed on the side of the ring (5) away from the housing (1), and the sealing ring (7) is concentrically arranged with the ring (5).

3. A spatially vertically staggered U-shaped tube heat exchanger according to claim 2, characterized in that, The hook (6) includes an inclined section (601) and a straight section (602) connected to each other at one end. The other end of the inclined section (601) is connected to the side wall of the ring (5), and the other end of the straight section (602) is provided with a trapezoidal block (6021). The straight section (602) has a notch (6022) on the side near the ring (5), and a slot (6023) is formed on the side away from the ring (5). The slot (6023) is connected to the notch (6022).

4. A spatially vertically interlaced U-shaped tube heat exchanger according to claim 3, characterized in that, The locking structure includes a collar (8), a slider (9), and a guide rod (10). The collar (8) is coaxially fixedly sleeved on the front tube box (2). The collar (8) has a slot (801) on the side away from the front tube box (2). The slot (801) includes an inlet / outlet slot (8011) and a fitting slot (8012). The inlet / outlet slot (8011) and the fitting slot (8012) are connected to each other. The hook (6) can enter the slot (801) through the inlet / outlet slot (8011). The fitting slot (8012) is adapted to the hook (6). When the hook (6) rotates and slides from the inlet / outlet slot (8011) into the fitting slot (8012), the fitting slot (8012) will engage with the hook (6) so that the ring (5) and the collar (8) cannot be separated.

5. A spatially vertically interlaced U-shaped tube heat exchanger according to claim 4, characterized in that, The collar (8) is provided with a sliding groove (802) and a receiving groove (803) respectively, and the sliding groove (802) is connected to the fitting groove (8012) and the receiving groove (803) respectively; The slider (9) is slidably disposed in the groove (802), the guide rod (10) is disposed in the receiving groove (803), one end of the slider (9) is provided with a bevel (901), and the other end is provided with an inset (902), and the trapezoidal block (6021) is adapted to the bevel (901) and the inset (902) respectively.

6. A spatially vertically staggered U-shaped tube heat exchanger according to claim 5, characterized in that, The outer wall of the guide rod (10) is slidably provided with a Z-shaped rod (11), which is connected to the slider (9). The outer wall of the guide rod (10) is fitted with a spring (12), and the two ends of the spring (12) abut against the inner wall of the Z-shaped rod (11) and the receiving groove (803) respectively, so as to drive the slider (9) to always have a tendency to move closer to the hook (6). When the hook (6) slides from the inlet / outlet slot (8011) into the fitting slot (8012), the inclined surface of the trapezoidal block (6021) will first abut against the oblique cut (901), so that the slider (9) slides and avoids in the sliding groove (802). During this process, the Z-shaped rod (11) will follow the slider (9) to compress the spring (12). When the trapezoidal block (6021) continues to move and is aligned with the inner opening (902), the spring (12) will drive the slider (9) to reset, so that the inner opening (902) and the trapezoidal block (6021) are engaged, that is, the hook (6) cannot be moved out of the fitting slot (8012). The collar (8) is provided with a disassembly hole (804), which corresponds to the slot (6023). When disassembling, one end of the pin is inserted through the disassembly hole (804) and the slot (6023) respectively and extended into the notch (6022). Then the slider (9) is pushed to slide, so that the inner hole (902) and the trapezoidal block (6021) are separated.

7. A spatially vertically staggered U-shaped tube heat exchanger according to claim 1, characterized in that, The housing (1) is respectively connected to a cold medium inlet pipe (101) and a cold medium outlet pipe (102). The cold medium inlet pipe (101) is located at the bottom of the housing (1) away from the front pipe box (2), and the cold medium outlet pipe (102) is located at the top of the housing (1) near the front pipe box (2). The front tube box (2) is symmetrically connected with a heat medium inlet pipe (201) and a heat medium outlet pipe (202) on its outer wall. The front tube box (2) is horizontally provided with a head baffle (203) inside, which separates the two ends of the U-shaped heat exchange tube bundle (3).

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