A pipe bending device for a pipe heat exchanger and a method of using the same

Abstract

The application relates to a pipe bending device for a pipe heat exchanger and a use method thereof, and belongs to the technical field of tooling for heat exchangers. The pipe bending device for the pipe heat exchanger comprises a screw rod, a connecting block and a pipe bending mechanism, the connecting block is internally provided with threads and is connected with the screw rod, a first zipper part is arranged between one side of the connecting block and one end of the pipe bending mechanism, the first zipper part is hinged with the connecting block and the pipe bending mechanism, a second zipper part is arranged between the other side of the connecting block and the other end of the pipe bending mechanism, the second zipper part is hinged with the connecting block and the pipe bending mechanism, one end of the screw rod can abut against the pipe bending mechanism, the pipe bending mechanism comprises a plurality of hinged connecting buckles, the connecting buckles are provided with through grooves, and the two sides of the connecting buckles are provided with inclined surfaces, the two sides of the pipe bending mechanism are provided with locking parts, and the locking parts can limit the pipe material in the through grooves. The pipe bending device can conveniently bend the pipe material, and the device is simple, portable and easy to use.

Description

Technical Field

[0001] This application relates to a tube bending device for a tube-wound heat exchanger and its usage method, belonging to the technical field of tooling for heat exchangers. Background Technology

[0002] During the assembly of a coiled tube heat exchanger, the heat exchange tubes need to be bent at approximately 90° when they begin to wind towards the central cylinder. At the end of the winding process, another bend is required to constrain the angle of the heat exchange tubes to be parallel to the central cylinder. Currently, the assembly process mostly involves manual bending, sometimes using a rubber mallet to strike the tubes. Because the heat exchange tubes are made of stainless steel, possessing high rigidity and elasticity, bending often requires two workers. Furthermore, due to the small diameter of the workbench in a coiled tube heat exchanger, the working range is limited, and workers frequently lean out of the workbench to bend the tubes, posing serious safety hazards and easily causing uneven stress on the tubes, leading to breakage and scrapping. Using a rubber mallet to strike the tubes can cause irregular dents due to uneven striking force, affecting the flow of the medium inside the tubes and impacting heat exchange efficiency.

[0003] There are some existing pipe bending fixtures, but these fixtures have the following problems: due to their complex structure, they are too large and heavy, making it inconvenient for operators to move and carry them to operate the heat exchange tubes. During operation, workers need to frequently move the heat exchange tubes back and forth to the operating table. Furthermore, existing pipe bending equipment often requires workers to control multiple points and pay attention to the degree of pipe bending. The operation process is very complicated, resulting in low efficiency in pipe bending. Summary of the Invention

[0004] To address the aforementioned issues, this application proposes a tube bending device and its usage method for a coiled tube heat exchanger. When using this device, the tube is placed in the through groove of the connecting buckle in the bending mechanism and secured with a locking component. Then, by moving the connecting block relative to the screw, the screw applies pressure to the bending mechanism, causing the bending mechanism to drive the tube and thus bend it. This bending device has a simple structure, is easy to use and portable, and because it employs multiple sequentially hinged connecting buckles in the bending mechanism, the bending effect is uniform and effective.

[0005] According to one aspect of this application, a tube bending device for a coiled tube heat exchanger is provided, comprising a screw, a connecting block, and a tube bending mechanism;

[0006] The connecting block has internal threads and is connected to the screw through the threads. A first zipper is provided between one side of the connecting block and one end of the bending mechanism. The first zipper is hinged to the connecting block and the bending mechanism. A second zipper is provided between the other side of the connecting block and the other end of the bending mechanism. The second zipper is hinged to the connecting block and the bending mechanism. The screw can move relative to the connecting block, and one end of the screw can abut against the bending mechanism.

[0007] The pipe bending mechanism includes a plurality of sequentially hinged connecting buckles. Each connecting buckle has a through groove for accommodating the pipe material, and both sides of each connecting buckle have inclined surfaces. The inclined surfaces of two adjacent connecting buckles can gradually approach and abut against each other when the screw abuts against the pipe bending mechanism. Locking components are also provided on both sides of the pipe bending mechanism. The locking components are used to confine the pipe material within the through groove of the connecting buckle.

[0008] The connecting buckle is in the shape of an inverted trapezoid, and the through groove is opened on the top surface of the connecting buckle. The connecting buckles are hinged together by hinges, which are provided on both sides of the connecting buckle and are inclined outward.

[0009] Optionally, the hinge is located near the top surface of the connecting buckle.

[0010] Optionally, the hinge includes a pair of first hinges and a pair of second hinges respectively disposed at both ends of the connecting buckle, wherein the first hinges are respectively disposed opposite to each other on both sides of the connecting buckle, and the second hinges are respectively disposed opposite to each other on both sides of the connecting buckle.

[0011] Optionally, the first hinge member has a first connecting hole and is tightly attached to the connecting buckle, the second hinge member has a second connecting hole and is connected to the connecting buckle through an extension plate, the thickness of the extension plate is not less than the thickness of the first hinge member, and the first connecting hole and the second connecting hole of adjacent connecting buckles are fixed by a connecting post so that the first hinge member and the second hinge member abut against each other.

[0012] Optionally, the two ends of the through groove are treated with smooth chamfers.

[0013] Optionally, the waist of the inverted trapezoidal connecting buckle, i.e. the inclined surface, has an angle of 55 to 75° with the top surface.

[0014] Optionally, the number of connecting clips is 20 to 25.

[0015] Optionally, the first zipper component and the second zipper component are plate-shaped.

[0016] Optionally, the sum of the lengths of the first zipper component and the second zipper component is less than the length of the bending mechanism.

[0017] According to another aspect of this application, a method of using any of the above-described tube bending devices for a wound tube heat exchanger is provided, the method comprising the following steps:

[0018] S1. Adjust the relative relationship between the connecting block and the screw to make the bending mechanism in a straight line.

[0019] S2. Place the pipe into the through groove of the connecting clip and secure it with the locking component;

[0020] S3. Make the screw and the connecting block move relative to each other, and one end of the screw abuts against the bending mechanism and applies pressure to it;

[0021] S4. Continue to move the screw and the connecting block relative to each other until the pipe is bent to the appropriate angle;

[0022] S5. Disassemble the locking components, remove the bent pipe, and adjust the relative relationship between the connecting block and the screw to bring the pipe bending mechanism back to a straight state.

[0023] The beneficial effects that this application may produce include, but are not limited to:

[0024] 1. The tube bending device for a coiled tube heat exchanger provided in this application has a connecting block and a screw moving relative to each other, which causes the screw to exert pressure on the tube bending mechanism, thereby causing the connecting buckle in the tube bending mechanism to bend the tube. It has the characteristic of uniform bending, and each connecting buckle is provided with a through groove, thereby increasing the contact area between the tube and the connecting buckle, which can effectively reduce the pressure of the connecting buckle on the tube during the tube bending process, thereby reducing the deformation and damage of the tube.

[0025] 2. The tube bending device for coiled tube heat exchangers provided in this application has the advantages of simple structure, small size and light weight, and simple operation. When using this tube bending device, only one worker is needed to move the connecting block and the screw relative to each other. A common operation method is to fix the screw, and after the worker installs and fixes the tube, rotate the first or second pull lock component.

[0026] 3. The tube bending device for a coiled tube heat exchanger provided in this application has inclined surfaces on both sides of the connecting buckle in the tube bending mechanism. These inclined surfaces can play a limiting role during the operation of the tube bending device, preventing the tube from being over-bent when the worker rotates the first or second zipper component excessively, which could lead to cracks in the tube. When the inclined surfaces of adjacent connecting buckles abut against each other, the connecting block and the screw cannot continue to move relative to each other to further bend the tube. The setting of these inclined surfaces can take into account the advantages of high tube bending efficiency and simple operation of the tube bending device, and also play a good limiting and protection role. During use, the worker only needs to focus on rotating the first or second zipper component, without having to pay attention to the degree of bending of the tube. Once it is found that the first or second zipper component cannot be rotated, the tube can no longer be bent, and the bending of the tube is completed.

[0027] 4. The tube bending device for a coiled tube heat exchanger provided in this application can uniformly and synchronously drive the first and second zipper components to move by the movement of the connecting block relative to the screw. This allows the first and second zipper components to drive the connecting buckles on both sides of the connecting block to uniformly deform the tube to be bent. At the same time, the screw can also compress the tube bending mechanism to make the two ends and the middle of the tube uniformly stressed. The stress is uniform and stable during the bending process. In addition, during the bending process, the tube resists deformation and abuts and compresses the through groove contact surfaces of each connecting buckle. The use of segmented connecting buckles can also improve the stress stability of the tube during the bending process, and the bending is naturally more uniform and stable. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a perspective view of a tube bending device for a wound tube heat exchanger according to an embodiment of this application;

[0030] Figure 2 This is a front view of a tube bending device for a wound tube heat exchanger according to an embodiment of this application;

[0031] Figure 3 This is a top view of a tube bending device for a wound tube heat exchanger according to an embodiment of this application;

[0032] Figure 4 This is a bottom view of a tube bending device for a wound tube heat exchanger according to an embodiment of this application;

[0033] Figure 5 This is a perspective view of the connecting buckle in the tube bending mechanism of the tube bending device for a tube-wound heat exchanger according to an embodiment of this application.

[0034] List of components and reference numerals:

[0035] 1-Connecting block, 2-Screw, 3-First zipper component, 4-Second zipper component, 5-Bending mechanism, 6-Connecting buckle, 7-Locking component, 8-Hinge, 9-Inclined surface. Detailed Implementation

[0036] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0037] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0039] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0043] Example 1

[0044] According to one aspect of this application, such as Figures 1-5 As shown, a tube bending device for a coiled tube heat exchanger is provided, including a screw 2, a connecting block 1 and a tube bending mechanism 5;

[0045] The connecting block 1 has internal threads and is connected to the screw 2 by threads. A first zipper 3 is provided between one side of the connecting block 1 and one end of the bending mechanism 5. The first zipper 3 is hinged to the connecting block 1 and the bending mechanism 5. A second zipper 4 is provided between the other side of the connecting block 1 and the other end of the bending mechanism 5. The second zipper 4 is hinged to the connecting block 1 and the bending mechanism 5. The screw 2 can move relative to the connecting block 1, and one end of the screw 2 can abut against the bending mechanism 5.

[0046] The pipe bending mechanism 5 includes a plurality of connecting buckles 6 that are hinged in sequence. The connecting buckles 6 have through grooves for accommodating pipes, and both sides of the connecting buckles 6 are provided with inclined surfaces 9. The inclined surfaces 9 of two adjacent connecting buckles 6 can gradually approach and abut against the pipe bending mechanism 5 when the screw 2 abuts against the pipe bending mechanism 5. Locking components 7 are also provided on both sides of the pipe bending mechanism 5. The locking components 7 are used to limit the pipes to be located in the through grooves of the connecting buckles 6.

[0047] The connecting clip 6 is inverted trapezoidal, with a through groove on its top surface. When inverted trapezoidal, the through groove length is maximized, ensuring maximum contact area between the bending mechanism 5 and the pipe. This reduces pressure between the bending mechanism 5 and the pipe, effectively minimizing excessive local pressure exerted by the bending mechanism 5 on the pipe during deformation, thus preventing pipe deformation and damage. The connecting clips 6 are hinged together by hinges 8, which are inclined outwards to match the inclined surface 9 of the connecting clips 6, facilitating the hinged connection.

[0048] In this application, when using the pipe bending device, first adjust the relative position of the connecting block 1 and the screw 2 so that the connecting buckle 6 in the pipe bending mechanism 5 is in a straight state. This allows the pipe to be bent to be placed in the through groove of the connecting buckle 6, with the through groove wall in full contact with the pipe. After fixing the locking component 7, adjust the relative position of the connecting block 1 and the screw 2 so that one end of the screw 2 applies pressure to the pipe bending mechanism 5, forcing each connecting buckle 6 in the pipe bending mechanism 5 to move and gradually drive the pipe to bend. When the adjacent inclined surfaces 9 of all the connecting buckles 6 in the pipe bending mechanism 5 are in contact, there is no gap left for the pipe to bend. At this point, the pipe is bent and the bending effect is uniform.

[0049] Furthermore, due to the structural design of the pipe bending device in this invention, the operator only needs to perform one operation during operation. Even if the connecting block 1 and the screw 2 move relative to each other, no other components need to be controlled during the relative movement, making the operation very simple. Moreover, at the end of the pipe bending, the pipe bending device can prevent the operator from over-bending by limiting the movement. The inclination degree of the inclined surface 9 can be set according to specific needs, so that when all the inclined surfaces 9 of the connecting buckles 6 abut, it is exactly the required bending angle. Therefore, during use, the operator only needs to perform one operation to move the connecting block 1 and the screw 2 relative to each other, and does not need to pay attention to the current bending degree of the pipe. When the connecting block 1 can no longer move relative to the screw 2, the pipe bending operation is completed.

[0050] The pipe bending device provided by this invention has the advantages of simple structure, small size and light weight, which makes it convenient for operators to move and bend pipes anytime and anywhere. Compared with heavy and bulky pipe bending equipment, it has a simple control method, high efficiency and high portability, which is more in line with actual needs and greatly reduces the workload and operation difficulty of operators.

[0051] This application does not specifically limit the implementation method of the locking component 7; it can adopt the implementation methods commonly used in the art, such as... Figure 1As shown, the locking component 7 has the same shape as the inverted trapezoidal connecting buckle 6, except that after fixing, it corresponds to the inverted trapezoidal connecting buckle 6 and is therefore a regular trapezoid. The locking component 7 and the connecting buckle 6 are fixed by a connecting piece fixed by a screw 2, and the pipe is fixed in the through groove of the locking component 7 and the connecting buckle 6. The locking component 7 adopts a similar overall structure to the connecting buckle 6, except that there is no hinge 8 in this solution. However, those skilled in the art will know that this application does not limit the implementation of the locking component 7. The locking component 7 can also be hinged to one end of the pipe bending mechanism 5, while the other end is fixed by a fastener.

[0052] about Figure 1 Regarding the configuration of the hinge 8 in the middle scheme, it should be noted that the hinge 8 described above refers to the hinge 8 between two adjacent connecting latches 6. However, as... Figure 1 The hinge 8 of the connecting buckles 6 on both sides of the tube bending mechanism 5 is set at a different angle and in a different direction than the hinge 8 between two adjacent connecting buckles 6. The hinge 8 enables the tube bending mechanism 5 to be hinged to the first zipper component 3 and the second zipper component 4 respectively.

[0053] In one implementation, the hinge 8 is positioned near the top surface of the connecting buckle 6, and the hinge is tilted outward. With the angle of the tilted surface 9 fixed, the two adjacent connecting buckles 6 of the hinge can rotate at a larger angle, which is more flexible and allows for a wider range of options to adjust the size of the tilted surface 9 as needed.

[0054] In one embodiment, the hinge 8 includes a pair of first hinges and a pair of second hinges respectively disposed at both ends of the connecting buckle 6. The first hinges are respectively disposed opposite to each other on both sides of the connecting buckle 6, and the second hinges are respectively disposed opposite to each other on both sides of the connecting buckle 6.

[0055] In one embodiment, the first hinge has a first connecting hole and is tightly attached to the connecting buckle 6. The second hinge has a second connecting hole and is connected to the connecting buckle 6 through an extension plate. The thickness of the extension plate is not less than the thickness of the first hinge. The first connecting hole and the second connecting hole of adjacent connecting buckles are fixed by a connecting post so that the first hinge and the second hinge abut against each other.

[0056] By using the aforementioned hinged connection method, the stability of the fixation between adjacent connecting clips 6 can be guaranteed. Since the bent pipe needs to be placed in the segmented through groove before bending, the segmented solution of this application has advantages such as good bending uniformity and ease of use. However, the segmented solution may have the problem of the pipe to be bent being difficult to install into the through groove. By using the above-mentioned hinged structure design, the hinged stability of the connecting clips 6 can be improved, thereby making it easier to install the pipe to be bent and reducing the problem of the pipe being difficult to fix due to the difficulty in aligning the through grooves in each connecting clip 6.

[0057] As one implementation method, the two ends of the through groove are smoothly chamfered, which can avoid deformation caused by the connecting buckle 6 pressing on the bent pipe during the bending process.

[0058] In one implementation, the waist of the inverted trapezoidal connecting buckle 6, i.e. the inclined surface 9, has an angle of 55 to 75° with the top surface. The size of this angle can be set as needed, and this angle affects the maximum bendable angle of the pipe.

[0059] In one implementation, the number of connecting clips is 20 to 25, and the number of connecting clips can also be set as needed to accommodate different bending angles and pipe lengths.

[0060] In one embodiment, the first zipper component 3 and the second zipper component 4 are plate-shaped. Since the connecting block 1 and the first zipper component 3 and the second zipper component 4 are subjected to relatively concentrated forces, setting them as plates can improve the overall connection strength of the pipe bending device.

[0061] In one implementation, the sum of the lengths of the first zipper component 3 and the second zipper component 4 is less than the length of the pipe bending mechanism. The lengths of the first zipper component 3 and the second zipper component 4 can be adjusted as needed. A slightly longer length for the first zipper component 3 and the second zipper component 4 can utilize the lever principle to reduce the amount of force required by the operator during the pipe bending process.

[0062] Example 2

[0063] According to another aspect of this application, a method of using a tube bending device for a wound tube heat exchanger is provided, the method comprising the following steps:

[0064] S1. Adjust the relative relationship between the connecting block 1 and the screw 2 to make the bending mechanism 5 in a straight line state;

[0065] S2. Place the pipe into the through groove of the connecting clip 6 and secure it with the locking component 7;

[0066] S3. Make the screw 2 move relative to the connecting block 1, and one end of the screw 2 abuts against the bending mechanism 5 and applies pressure to it;

[0067] S4. Continue to move the screw 2 relative to the connecting block 1 until the pipe is bent to a suitable angle;

[0068] S5. Disassemble the locking component 7, remove the bent pipe, and adjust the relative relationship between the connecting block 1 and the screw 2 so that the pipe bending mechanism 5 is back in a straight state.

[0069] When bending pipes using the above method, the operator can easily move the lightweight and compact pipe bending device. Secondly, the control method is relatively simple. For example, the first zipper component 3 or the second zipper component 4 can be rotated by fixing the screw 2. During the rotation, the length of the first zipper component 3 and the second zipper component 4 can be adjusted to reduce the required force by leveraging the lever effect. Most importantly, the operation is simple. Only the rotation of the first zipper component 3 or the second zipper component 4 needs to be controlled. No other parts need to be operated or any other unnecessary operations need to be performed. There is no need to constantly monitor the degree of pipe bending. When all the inclined surfaces 9 of the connecting clips 6 are fully engaged and there is no more bending space, the pipe is bent and the bending uniformity of the pipe is high.

[0070] The tube bending device for coiled tube heat exchangers provided in this application is ingeniously designed and small in size compared to the complex and difficult-to-operate tube bending table equipment commonly used in the prior art. It is also easier to operate and control. The ingenious structural design makes the device compact and easy to use, reducing the difficulty of operation for operators and improving work efficiency. Furthermore, the design of this application uses a segmented multiple connecting buckles for bending, which can improve the bending uniformity of the tube and achieve a good bending effect.

[0071] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0072] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A tube bending device for a wound tube heat exchanger, characterized in that, Includes screw, connecting block and pipe bending mechanism; The connecting block has internal threads and is connected to the screw through the threads. A first zipper is provided between one side of the connecting block and one end of the bending mechanism. The first zipper is hinged to the connecting block and the bending mechanism. A second zipper is provided between the other side of the connecting block and the other end of the bending mechanism. The second zipper is hinged to the connecting block and the bending mechanism. The screw can move relative to the connecting block, and one end of the screw can abut against the bending mechanism. The pipe bending mechanism includes a plurality of sequentially hinged connecting buckles. Each connecting buckle has a through groove for accommodating the pipe material, and both sides of each connecting buckle have inclined surfaces. The inclined surfaces of two adjacent connecting buckles can gradually approach and abut against each other when the screw abuts against the pipe bending mechanism. Locking components are also provided on both sides of the pipe bending mechanism. The locking components are used to confine the pipe material within the through groove of the connecting buckle. The connecting buckle is in the shape of an inverted trapezoid, the through groove is opened on the top surface of the connecting buckle, and the connecting buckles are hinged together by hinges. The hinges are arranged on both sides of the connecting buckle and are inclined outward. The hinge is located near the top surface of the connecting buckle. The hinge includes a pair of first hinges and a pair of second hinges respectively located at both ends of the connecting buckle. The first hinges are respectively located opposite to each other on both sides of the connecting buckle, and the second hinges are respectively located opposite to each other on both sides of the connecting buckle. The first hinge has a first connecting hole and is tightly attached to the connecting buckle. The second hinge has a second connecting hole and is connected to the connecting buckle through an extension plate. The thickness of the extension plate is not less than the thickness of the first hinge. The first connecting hole and the second connecting hole of adjacent connecting buckles are fixed by a connecting post so that the first hinge and the second hinge abut against each other. The first zipper component and the second zipper component are plate-shaped, and the sum of the lengths of the first zipper component and the second zipper component is less than the length of the bending mechanism.

2. The tube bending device for a wound tube heat exchanger according to claim 1, characterized in that, The two ends of the through groove are smoothly chamfered.

3. The tube bending device for a wound tube heat exchanger according to claim 1, characterized in that, The waist of the inverted trapezoidal connecting buckle, i.e. the inclined surface, has an angle of 55~75° with the top surface.

4. The tube bending device for a wound tube heat exchanger according to claim 1, characterized in that, The number of connecting clips is 20 to 25.

5. The method of using the tube bending device for a wound tube heat exchanger according to any one of claims 1 to 4, characterized in that, The method includes the following steps: S1. Adjust the relative relationship between the connecting block and the screw to make the bending mechanism in a straight line. S2. Place the pipe into the through groove of the connecting clip and secure it with the locking component; S3. Make the screw and the connecting block move relative to each other, and one end of the screw abuts against the bending mechanism and applies pressure to it; S4. Continue to move the screw and the connecting block relative to each other until the pipe is bent to the appropriate angle; S5. Disassemble the locking components, remove the bent pipe, and adjust the relative relationship between the connecting block and the screw to bring the pipe bending mechanism back to a straight state.

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