Tube bundle restraining device and method

Abstract

The invention relates to the technical field of nuclear power equipment manufacturing, and particularly discloses a tube bundle restraining device which comprises a U-shaped pressing plate. The upper pressing plate is arranged at the notch of the U-shaped pressing plate and movably connected with the U-shaped pressing plate, and a containing space used for containing the tube bundle is formed between the U-shaped pressing plate and the upper pressing plate; the side pressing assemblies are arranged on the two side walls of the U-shaped pressing plate, at least one part of each side pressing assembly is located in the containing space, and the side pressing assemblies are used for providing lateral restraining force for the tube bundle located in the containing space; and the bottom pressing assembly is arranged on the bottom wall of the pressing plate, at least one part of the bottom pressing assembly is located in the containing space, and the bottom pressing assembly is used for providing upward restraining force for the tube bundle located in the containing space. Longitudinal and transverse constraints can be provided for the tube bundle at the same time, so that the section size of the tube bundle is accurately constrained, the row and column perpendicularity is guaranteed, the load of the tube bundle is uniform, and the tube clamp assembly quality and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power equipment manufacturing technology, and in particular to a tube bundle confinement device and method. Background Technology

[0002] The original pipe clamp tooling has many defects in pipe clamp assembly and related pipe bundle constraint operations.

[0003] On the one hand, the original pipe clamp fixture can only apply load in one direction on one side, and cannot apply load in the same direction symmetrically on the other side. This asymmetrical force application method will result in uneven cross-sectional dimensions of the pipe bundle on both sides in the same direction. Specifically, the cross-sectional dimensions on the compressed side are relatively smaller, while those on the uncompressed side are relatively larger, which cannot accurately reflect the cross-sectional dimensions at the pipe clamp assembly point, thus affecting the compatibility between the pipe clamp and the pipe bundle and the assembly quality.

[0004] On the other hand, the original tube clamp fixture can only adjust the cross-sectional dimensions in one direction, and cannot guarantee that the angles between rows and columns of tube bundles are perpendicular. During the tube bundle constraint process, multiple rows of tube bundles are easily compressed into a tube bundle cross-section resembling a parallelogram. This distorted cross-sectional dimension not only fails to accurately reflect the actual state of the tube bundle, but also seriously affects the installation of the tube clamp, resulting in a loose fit between the tube clamp and the tube bundle, reducing the stability and reliability of the entire tube bundle system. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of the present invention is to provide a tube bundle constraint device and method that can simultaneously provide longitudinal and lateral constraints on the tube bundle, thereby accurately constraining the cross-sectional dimensions of the tube bundle, ensuring the perpendicularity of rows and columns, and making the load on the tube bundle uniform, which has the advantages of improving the assembly quality and stability of tube clamps.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: On one hand, the present invention discloses a tube restraint device, which includes: U-shaped pressure plate; An upper pressure plate is disposed at the notch of the U-shaped pressure plate and is movably connected to the U-shaped pressure plate, and a receiving space for accommodating the tube bundle is formed between the U-shaped pressure plate and the upper pressure plate; The side-pressure assembly is provided on both sides of the U-shaped pressure plate, and at least a portion of the side-pressure assembly is located within the receiving space. The side-pressure assembly is used to provide lateral restraint force for the tube bundle located within the receiving space. A bottom pressure assembly is disposed on the bottom wall of the pressure plate, at least a portion of the bottom pressure assembly is located within the receiving space, and the bottom pressure assembly is used to provide an upward constraint force for the tube bundle located within the receiving space.

[0007] Compared with existing technologies, this application can provide a comprehensive constraint space for the tube bundle. Through the lateral constraint force of the side pressure component, and the upward constraint force provided by the upper pressure plate and the bottom pressure component, it can effectively solve the problems of uneven tube bundle cross-sectional dimensions and non-perpendicular row and column angles, thereby improving the assembly quality and stability of the tube bundle.

[0008] As a preferred embodiment of the present invention, studs are provided on both sides of the U-shaped plate, and through holes are provided on the upper pressure plate corresponding to the studs. The studs pass through the through holes so that the upper pressure plate is positioned above the U-shaped pressure plate. A constraint nut is threaded onto the studs, and the upper pressure plate is located between the constraint nut and the U-shaped pressure plate.

[0009] By adopting the above solution, the upper pressure plate and the U-shaped pressure plate can be flexibly connected and fixed through the cooperation of studs, through holes and constraint nuts, which facilitates the installation, disassembly and position adjustment of the upper pressure plate and improves the convenience and flexibility of the device.

[0010] As a preferred embodiment of the present invention, the bottom wall of the upper pressure plate is provided with a constraint protrusion corresponding to the notch of the U-shaped pressure plate, and the constraint protrusion is used to provide a downward constraint force for the tube bundle.

[0011] By adopting the above scheme, the constraint protrusion further enhances the downward constraint force on the tube bundle, which, together with the upward constraint force of the bottom pressure component, better constrains the longitudinal cross-sectional dimensions of the tube bundle and improves the constraint effect.

[0012] As a preferred embodiment of the present invention, the side pressure assembly includes: A side pressure plate, wherein the side pressure plate is disposed within the receiving space; A side pressure adjustment component is provided, which passes through the side wall of the U-shaped pressure plate and is connected to the side pressure plate.

[0013] Using the above solution, the side pressure plate and the side pressure adjustment component work together to flexibly adjust the position of the side pressure plate according to the actual size and shape of the tube bundle, accurately provide lateral constraint force, and adapt to the constraint requirements of tube bundles of different specifications.

[0014] As a preferred embodiment of the present invention, the side wall of the U-shaped pressure plate is provided with a first threaded hole, and the side pressure adjustment member is threadedly connected to the side wall of the U-shaped pressure plate through the first threaded hole.

[0015] Using the above scheme, the side pressure adjustment component is threadedly connected to the side wall of the U-shaped pressure plate through the first threaded hole. The connection method is simple and reliable, and it is convenient to install, disassemble and precisely adjust the side pressure adjustment component. By rotating the side pressure adjustment component, the side pressure plate can be moved within the accommodating space, thereby adjusting the lateral constraint on the tube bundle and ensuring the stability and accuracy of the lateral constraint force.

[0016] As a preferred embodiment of the present invention, the side pressure plate is provided with a first limiting groove corresponding to the side pressure adjustment member, and the end of the side pressure adjustment member near the side pressure plate is located in the first limiting groove.

[0017] Using the above scheme, the first limiting groove limits the end of the side pressure adjustment component near the side pressure plate. When the side pressure adjustment component is rotated for adjustment, the first limiting groove can restrict the position of the side pressure adjustment component on the side pressure plate, prevent the side pressure plate from shifting during the adjustment process of the side pressure adjustment component, ensure the stability and accuracy of the side pressure plate movement, and improve the lateral constraint effect.

[0018] As a preferred embodiment of the present invention, the low-pressure assembly includes: A bottom pressure plate, wherein the bottom pressure plate is disposed within the receiving space; A bottom pressure adjustment component passes through the bottom wall of the U-shaped pressure plate and is connected to the bottom pressure plate.

[0019] By adopting the above scheme, the bottom pressure plate and the bottom pressure adjustment component work together to flexibly adjust the position of the bottom pressure plate according to the actual needs of the tube bundle, accurately provide upward constraint force, adapt to the constraint requirements of tube bundles of different specifications, and improve the versatility of the device.

[0020] As a preferred embodiment of the present invention, the bottom wall of the U-shaped pressure plate is provided with a second threaded hole, and the bottom pressure adjustment component is threadedly connected to the bottom wall of the U-shaped pressure plate through the second threaded hole.

[0021] Using the above scheme, the bottom pressure adjustment component is threadedly connected to the bottom wall of the U-shaped pressure plate through the second threaded hole. The connection method is simple and reliable, and it is convenient to install, disassemble and precisely adjust the bottom pressure adjustment component. By rotating the bottom pressure adjustment component, the bottom pressure plate can be moved within the accommodating space, thereby adjusting the upward constraint on the tube bundle and ensuring the stability and accuracy of the upward constraint force.

[0022] As a preferred embodiment of the present invention, the bottom pressure plate is provided with a second limiting groove corresponding to the bottom pressure adjustment member, and one end of the bottom pressure adjustment member near the bottom pressure plate is located in the second limiting groove.

[0023] Using the above scheme, the second limiting groove limits the end of the bottom pressure adjustment component near the bottom pressure plate. When the bottom pressure adjustment component is rotated for adjustment, the second limiting groove can restrict the position of the bottom pressure adjustment component on the bottom pressure plate, prevent the bottom pressure plate from shifting during the adjustment process of the bottom pressure adjustment component, ensure the stability and accuracy of the movement of the bottom pressure plate, and improve the lateral constraint effect.

[0024] On the other hand, the present invention provides a tube constraint method, which includes the following steps: S1. Place the side pressure plate and bottom pressure plate of the two tube bundle restraint devices inside the U-shaped pressure plate, place the tube bundle between the side pressure plate and the bottom pressure plate, and install the upper pressure plate on the U-shaped pressure plate through the fit of the stud and the through hole. Then, install the restraint nut on the stud to complete the initial installation of the two tube bundle restraint devices. The two tube bundle restraint devices are symmetrically distributed on both sides of the tube clamp, and the distance between them and the tube clamp is 30 to 50 mm. The distances from the two tube bundle restraint devices to the tube clamp are equal. S2. Install side pressure adjustment components and bottom pressure adjustment components on the two side walls and the bottom wall of the U-shaped pressure plate respectively, and adjust the position of the side pressure plate and the bottom pressure plate so that one end of the side pressure adjustment component is placed in the first limiting groove and one end of the bottom pressure adjustment component is placed in the second limiting groove. S3. Use constraint nuts, upper pressure plate, bottom pressure adjustment piece, U-shaped pressure plate and bottom pressure plate to constrain the longitudinal cross-sectional dimensions of the tube bundle; S4. Use side pressure adjustment components, side pressure plates, and U-shaped pressure plates to constrain the transverse cross-sectional dimensions of the tube bundle; S5. Continuously adjust the transverse and longitudinal cross-sectional dimensions of the tube bundle, while paying attention to the perpendicularity between the rows and columns of the tube bundle. Ensure that the perpendicular angle deviation between the rows and columns of the tube bundle is within 0.3° by adjusting the side pressure adjustment component, constraint nut and bottom pressure adjustment component. S6. After constraining the tube bundle cross-sectional dimensions to the target cross-sectional dimensions, assemble the tube clamps and perform welding operations on the tube clamps. After the welding operations are completed, remove the two tube bundle constraint devices located on both sides of the tube clamps.

[0025] Compared to existing technologies, this application provides a stable and symmetrical constraint environment for the tube bundle by precisely controlling the installation position and distance of the two tube bundle constraint devices, which helps to ensure the perpendicularity between the rows and columns of the tube bundle. By gradually adjusting the side pressure adjustment component, constraint nut, and bottom pressure adjustment component, the transverse and longitudinal cross-sectional dimensions of the tube bundle can be precisely controlled, keeping the vertical angle deviation within a very small range, effectively ensuring assembly accuracy, making the tube bundle load uniform, and improving the overall performance and service life of the tube bundle.

[0026] The aforementioned tube bundle constraint device and method have the following beneficial effects: by setting a U-shaped pressure plate and an upper pressure plate to form a space for accommodating the tube bundle, the side pressure components set on both sides of the U-shaped pressure plate provide lateral constraint force for the tube bundle, and the bottom pressure components set on the bottom wall provide upward constraint force for the tube bundle. This can effectively constrain the tube bundle from multiple directions, accurately control the cross-sectional dimensions of the tube bundle, avoid uneven cross-sectional dimensions of the tube bundle, and ensure the perpendicularity between rows and columns of the tube bundle, effectively improving the quality and stability of tube bundle assembly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a tube bundle restraint device according to the present invention; In the diagram: 1. U-shaped pressure plate; 2. Upper pressure plate; 3. Accommodation space; 4. Side pressure assembly; 41. Side pressure plate; 42. Side pressure adjustment component; 43. First threaded hole; 44. First limiting groove; 5. Bottom pressure assembly; 51. Bottom pressure plate; 52. Bottom pressure adjustment component; 53. Second threaded hole; 54. Second limiting groove; 6. Stud; 7. Through hole; 8. Constraint nut; 9. Constraint protrusion; 10. Tube bundle.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and easier to understand, the present invention will now be described in detail with reference to the accompanying drawings and several embodiments.

[0033] Example 1 Reference Figure 1In one aspect, the present invention provides a tube bundle constraint device, comprising: a U-shaped pressure plate 1, an upper pressure plate 2, a side pressure component 4, and a bottom pressure component 5. The U-shaped pressure plate 1 serves as the basic support structure of the entire device and is U-shaped, used to construct a spatial frame for accommodating the tube bundle 10. The upper pressure plate 2 is disposed at the notch of the U-shaped pressure plate 1. Studs 6 are provided on both side walls of the U-shaped pressure plate 1. In this embodiment, the studs 6 are welded to the top walls of both side walls of the U-shaped pressure plate 1. The upper pressure plate 2 is provided with through holes 7 corresponding to the studs 6. The studs 6 pass through the through holes 7, and constraint nuts 8 are threaded onto the studs 6, so that the upper pressure plate 2 can move along the axial direction of the studs 6, thereby realizing the movable connection of the upper pressure plate 2 above the U-shaped pressure plate 1. An accommodating space 3 for accommodating the tube bundle 10 is formed between the upper pressure plate 2 and the U-shaped pressure plate 1.

[0034] Side pressure components 4 are provided on both sides of the U-shaped pressure plate 1. The side pressure components 4 include a side pressure plate 41 and a side pressure adjusting member 42. The side pressure plate 41 is located within the receiving space 3. The side wall of the U-shaped pressure plate 1 is provided with a first threaded hole 43. The side pressure adjusting member 42 is threaded to the side wall of the U-shaped pressure plate 1 through the first threaded hole 43 and is connected to the side pressure plate 41. In this embodiment, the side pressure adjusting member 42 is a bolt, and there are two side pressure adjusting members 42. In some other embodiments, the number of side pressure adjusting members 42 can be increased or decreased according to actual needs. The number of side pressure adjusting members 42 is not limited here.

[0035] The bottom pressure assembly 5 is disposed on the bottom wall of the U-shaped pressure plate 1. The bottom pressure assembly 5 includes a bottom pressure plate 51 and a bottom pressure adjusting member 52. The bottom pressure plate 51 is located within the receiving space 3. The bottom wall of the U-shaped pressure plate 1 is provided with a second threaded hole 53. The bottom pressure adjusting member 52 is threadedly connected to the bottom wall of the U-shaped pressure plate 1 through the second threaded hole 53 and is connected to the bottom pressure plate 51. In this embodiment, the bottom pressure adjusting member 52 is a bolt, and the number of bottom pressure adjusting members 52 is 3. In some other embodiments, the number of bottom pressure adjusting members 52 can be increased or decreased according to actual needs. The number of bottom pressure adjusting members 52 is not limited here.

[0036] Reference Figure 1 In one embodiment, to address the issue of positional shift that occurs during the adjustment process of the side pressure adjustment member 42 and the bottom pressure adjustment member 52, a first limiting groove 44 is provided on the side pressure plate 41 at the position corresponding to the side pressure adjustment member 42. The end of the side pressure adjustment member 42 closest to the side pressure plate 41 is located within the first limiting groove 44. Thus, when the side pressure adjustment member 42 is rotated, the first limiting groove 44 can restrict the position of the side pressure adjustment member 42 on the side pressure plate 41, preventing the side pressure plate 41 from shifting during the adjustment process of the side pressure adjustment member 42, and ensuring the stability and accuracy of the movement of the side pressure plate 41.

[0037] Similarly, a second limiting groove 54 is provided at the position of the bottom pressure plate 51 corresponding to the bottom pressure adjustment component 52, and the end of the bottom pressure adjustment component 52 near the bottom pressure plate is located in the second limiting groove 54. In this way, when the bottom pressure adjustment component 52 is rotated, the second limiting groove 54 can limit the position of the bottom pressure adjustment component 52 on the bottom pressure plate 51, prevent the bottom pressure plate 51 from shifting during the adjustment process of the bottom pressure adjustment component 52, and ensure the stability and accuracy of the movement of the bottom pressure plate 51.

[0038] Reference Figure 1 In one embodiment, a constraint protrusion 9 is provided on the bottom wall of the upper pressure plate 2 at the notch corresponding to the U-shaped pressure plate 1. After the upper pressure plate 2 is installed above the U-shaped pressure plate 1 through the stud 6, through hole 7, and constraint nut 8, the constraint protrusion 9 is located in the receiving space 3 and is used to provide a downward constraint force for the tube bundle 10. In this embodiment, the constraint protrusion 9 and the upper pressure plate 2 are integrally formed. In some other embodiments, the constraint protrusion 9 and the upper pressure plate 2 can also be connected by welding. As long as a fixed connection between the constraint protrusion 9 and the upper pressure plate 2 can be achieved, the specific connection method between the constraint protrusion 9 and the upper pressure plate 2 is not limited here.

[0039] Example 2 In another aspect, the present invention provides a tube bundle constraint method, which involves constraining a tube bundle 10 using a tube bundle constraint device disclosed in the above embodiments. The tube bundle constraint method includes the following steps: Step S1. Place the side pressure plate 41 and bottom pressure plate 51 of the two tube bundle restraint devices inside the U-shaped pressure plate 1, and place the tube bundle 10 between the side pressure plate 41 and the bottom pressure plate 51. Install the upper pressure plate 2 above the U-shaped pressure plate 1 through the engagement of the stud 6 and the through hole 7, and assemble the restraint nut 8 on the stud 6 to complete the initial installation of the two tube bundle restraint devices. The two tube bundle restraint devices are symmetrically distributed on both sides of the tube clamp, and the distance between them and the tube clamp is 30 to 50 mm. The distances from the two tube bundle restraint devices to the tube clamp are equal. In this embodiment, the distance between the tube bundle restraint device and the tube clamp is 40 mm. In some other embodiments, the distance between the two tube bundle restraint devices and the tube clamp can also be adjusted according to the actual specifications of the tube bundle 10 and the assembly requirements, as long as the effective restraint of the tube bundle 10 can be guaranteed. The specific distance is not strictly limited here.

[0040] Step S2. Assemble the side pressure adjustment component 42 and the bottom pressure adjustment component 52 on the two side walls and the bottom wall of the U-shaped pressure plate 1 respectively. Rotate the side pressure adjustment component 42 and the bottom pressure adjustment component 52 to adjust the position of the side pressure plate 41 and the bottom pressure plate 51 so that one end of the side pressure adjustment component 42 is placed in the first limiting groove 44 and one end of the bottom pressure adjustment component 52 is placed in the second limiting groove 54.

[0041] Step S3. Constrain the longitudinal cross-sectional dimensions of the tube bundle 10 using the constraint nut 8, upper pressure plate 2, bottom pressure adjustment component 52, U-shaped pressure plate 1, and bottom pressure plate 51. Specifically, by rotating the constraint nut 8 and bottom pressure adjustment component 52, the pressure of the upper pressure plate 2 and bottom pressure plate 51 on the tube bundle 10 is adjusted, thereby controlling the longitudinal cross-sectional dimensions of the tube bundle 10.

[0042] Step S4. Constrain the transverse cross-sectional dimensions of the tube bundle 10 using the side pressure adjustment member 42, the side pressure plate 41, and the U-shaped pressure plate 1. Specifically, rotate the side pressure adjustment member 42 located on both sides of the U-shaped pressure plate 1 to push the side pressure plate 41, so that the side pressure plate 41 applies appropriate lateral pressure to the tube bundle 10 and controls the transverse dimensions of the tube bundle 10.

[0043] Step 5. Continuously adjust the transverse and longitudinal cross-sectional dimensions of the tube bundle 10, while paying attention to the perpendicularity between the rows and columns of the tube bundle 10. Ensure that the vertical angle deviation between the rows and columns of the tube bundle 10 is within 0.3° by adjusting the side pressure adjustment component 42, the constraint nut 8 and the bottom pressure adjustment component 52.

[0044] Step S6. After constraining the cross-sectional dimensions of tube bundle 10 to the target cross-sectional dimensions, assemble the tube clamp and perform welding operations on the tube clamp. After the welding operation is completed, remove the two tube bundle constraint devices located on both sides of the tube clamp.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tube bundle restraining device, characterized by, The utility model relates to a pipe bundle restraining device, which comprises the following parts: A U-shaped pressing plate; An upper pressing plate arranged at the gap of the U-shaped pressing plate and movably connected with the U-shaped pressing plate, and a containing space for containing the pipe bundle being formed between the U-shaped pressing plate and the upper pressing plate; A side pressing assembly arranged on the two side walls of the U-shaped pressing plate, at least a part of the side pressing assembly being located in the containing space, and the side pressing assembly being used for providing a lateral restraining force for the pipe bundle located in the containing space; A bottom pressing assembly arranged on the bottom wall of the pressing plate, at least a part of the bottom pressing assembly being located in the containing space, and the bottom pressing assembly being used for providing an upward restraining force for the pipe bundle located in the containing space.

2. The tube bundle restraint apparatus of claim 1, wherein: Screws are arranged on the two side walls of the U-shaped plate, through holes corresponding to the screws are arranged on the upper pressing plate, the screws are arranged through the through holes to arrange the upper pressing plate above the U-shaped pressing plate, and restraining nuts are threadedly connected with the screws, the upper pressing plate being located between the restraining nuts and the U-shaped pressing plate.

3. The tube bundle restraint of claim 2, wherein: A restraining protrusion is arranged on the bottom wall of the upper pressing plate corresponding to the gap of the U-shaped pressing plate, and the restraining protrusion is used for providing a downward restraining force for the pipe bundle.

4. The tube bundle restraint of claim 1, wherein, The side pressing assembly comprises: A side pressing plate arranged in the containing space; A side pressing adjusting piece arranged through the side wall of the U-shaped pressing plate and connected with the side pressing plate.

5. The tube bundle restraint of claim 4, wherein: A first threaded hole is arranged on the side wall of the U-shaped pressing plate, and the side pressing adjusting piece is threadedly connected with the side wall of the U-shaped pressing plate through the first threaded hole.

6. The tube bundle restraint of claim 4, wherein: A first limiting groove corresponding to the side pressing adjusting piece is arranged on the side pressing plate, and one end of the side pressing adjusting piece close to the side pressing plate is located in the first limiting groove.

7. The tube bundle restraint of claim 1, wherein, The bottom pressing assembly comprises: A bottom pressing plate arranged in the containing space; A bottom pressing adjusting piece arranged through the bottom wall of the U-shaped pressing plate and connected with the bottom pressing plate.

8. The tube bundle restraint of claim 7, wherein: A second threaded hole is arranged on the bottom wall of the U-shaped pressing plate, and the bottom pressing adjusting piece is threadedly connected with the bottom wall of the U-shaped pressing plate through the second threaded hole.

9. The tube bundle restraint of claim 7, wherein: A second limiting groove corresponding to the bottom pressing adjusting piece is arranged on the bottom pressing plate, and one end of the bottom pressing adjusting piece close to the bottom pressing plate is located in the second limiting groove.

10. A tube bundle restraining method characterized by, The utility model relates to a pipe bundle restraining device, which comprises the following parts: S1. arranging the side pressing plates and the bottom pressing plates of two pipe bundle restraining devices in the U-shaped pressing plate, arranging the pipe bundle between the side pressing plates and the bottom pressing plates, arranging the upper pressing plate above the U-shaped pressing plate through the cooperation of the screws and the through holes, assembling the restraining nuts on the screws, and completing the preliminary installation of the two pipe bundle restraining devices, wherein the two pipe bundle restraining devices are symmetrically distributed on the two sides of the pipe clamp, the distance between the pipe clamp and the two pipe bundle restraining devices is 30-50 mm, and the distances between the two pipe bundle restraining devices and the pipe clamp are equal; S2. assembling the side pressing adjusting pieces and the bottom pressing adjusting pieces on the two side walls and the bottom wall of the U-shaped pressing plate, respectively, adjusting the positions of the side pressing plates and the bottom pressing plates, arranging one end of the side pressing adjusting piece in the first limiting groove, and arranging one end of the bottom pressing adjusting piece in the second limiting groove; S3. restraining the longitudinal sectional dimension of the pipe bundle by using the restraining nuts, the upper pressing plate, the bottom pressing adjusting pieces, the U-shaped pressing plate and the bottom pressing plates. S4. Restrict the transverse cross-sectional dimension of the tube bundle by using the side pressure adjusting member, the side pressure plate and the U-shaped pressure plate; S5. Continuously adjust the transverse cross-sectional dimension and the longitudinal cross-sectional dimension of the tube bundle, while paying attention to the perpendicularity between the rows and columns of the tube bundle, and ensure that the perpendicular angle deviation between the rows and columns of the tube bundle is within 0.3° by adjusting the side pressure adjusting member, the restricting nut and the bottom pressure adjusting member; S6. After the cross-sectional dimension of the tube bundle is restricted to the target cross-sectional dimension, assemble the tube clamp and perform the welding operation on the tube clamp, and then remove the two tube bundle restricting devices located on both sides of the tube clamp after the welding operation is completed.

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