Tube plate assembling tool

Abstract

The utility model discloses a tube plate assembling tool which is mainly used for positioning tubes from different sides of the tubes through gap positioning pieces, can be suitable for the tubes with different outer diameters by being matched with moving grooves, enables the tubes to be connected to the peripheries of the gap positioning pieces in a sleeved mode, achieves gap fixation between the edges of welding holes and the tubes, and further achieves fixation of relative positions of the tube plates. According to the main technical scheme, a plurality of moving grooves are formed in a base, each moving groove comprises a first end and a second end, and the moving grooves are close to one another in the direction from the second ends to the first ends; the gap positioning pieces are embedded into the moving grooves in a sliding mode, part of the gap positioning pieces extend out of the moving grooves, and the gap positioning pieces are used for being connected between the edges of the pipe fittings and the welding holes to position the pipe fittings and the plates; the base is further provided with a welding hole, the welding hole is located between the two moving grooves, and the welding hole corresponds to the position between the pipe and the edge of the welding hole. The device is mainly used for welding the tube plate group.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a tube sheet assembly tooling. Background Technology

[0002] In the nuclear power industry, the welding quality of tube sheets is of paramount importance. To ensure the positional accuracy of the tube sheets after welding, the tubes and sheets are usually fixed with clamps first, and then the tube sheets are assembled by spot welding, thereby avoiding misalignment of the tube sheets during welding.

[0003] In existing tube-to-plate (TBP) assembly welding, the tubes and plates are typically fixed separately using clamps. However, some tooling has poor compatibility with different tube diameters and TBP thicknesses, making it difficult to meet requirements. Traditional tooling lacks positioning accuracy, which can easily lead to misalignment between the tubes and plates, affecting welding quality. Moreover, the operation is complex, requiring operators to spend a significant amount of time on debugging and assembly, hindering efficient assembly. Utility Model Content

[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, this utility model provides a tube sheet assembly tooling.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model provides a tube sheet assembly fixture for positioning tubes and plates. The tube sheet assembly fixture includes:

[0007] A base (100) is provided with a plurality of movable slots (101), each movable slot (101) having a first end and a second end, and the plurality of movable slots (101) being close to each other in the direction from the second end to the first end;

[0008] Multiple gap positioning elements (200) are slidably embedded in the moving groove (101), and a portion of the structure of the gap positioning element (200) extends out of the moving groove (101);

[0009] The base (100) is also provided with welding holes (102), which are located between the two moving slots (101).

[0010] Among them, multiple moving slots (101) extend to the same point on the base (100), and the included angle between the extension directions of any two adjacent moving slots (101) is the same.

[0011] The number of moving slots (101) is three.

[0012] The first ends of the multiple movable slots (101) are spaced apart, and the second ends of the multiple movable slots (101) penetrate the side wall of the base (100).

[0013] Among them, the multiple gap positioning elements (200) include at least two types of positioning elements. The different types of positioning elements all include a sliding part (210) and a positioning part (220) connected to the sliding part (210). The sliding part (210) is slidably connected to the moving groove (101), and the positioning part (220) extends out of the moving groove (101). The sliding part (210) of the different types of positioning elements has the same structure, and the radial cross-sectional area of ​​the positioning part (220) of the different types of positioning elements is different.

[0014] The positioning part (220) is a cylinder, and the outer diameter of the positioning part (220) is different for different types of positioning parts.

[0015] The welding hole (102) passes through the base (100).

[0016] The opening width of the welding hole (102) at the end away from the edge of the base (100) is smaller than the opening width of the welding hole (102) at the end near the edge of the base (100).

[0017] This also includes:

[0018] Gasket (300), gasket (300) is a circular gasket, gasket (300) is used to support the tube between the tube and the base (100).

[0019] There are multiple gaskets (300), and the thickness of different gaskets (300) is different.

[0020] The tube-plate assembly fixture proposed in this utility model mainly uses gap positioning components to position the tubes from different sides. The relative movement of these gap positioning components within a moving groove allows for welding of tubes with different outer diameters. The plate is fitted onto the outer circumference of the gap positioning components, fixing the gap between the edge of the welding hole and the tube, thereby fixing the relative position of the tube and plate. This fixture is applicable to welding and assembling tubes and plates of different diameters. The fixture is simple to operate, improves work efficiency, and has good stability, effectively preventing movement of the tubes and plates during welding assembly, improving welding quality and ensuring assembly accuracy. Furthermore, the fixture has a simple structure, low cost, and is easy to manufacture and maintain. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a tube sheet assembly tooling provided in an embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the base in a tube sheet assembly tooling from a first-view perspective, provided for an embodiment of this utility model;

[0023] Figure 3A schematic diagram of the base in a tube sheet assembly tooling from a second perspective, provided as an embodiment of this utility model;

[0024] Figure 4 A schematic diagram of the structure of a tube sheet assembly tooling in a first usage scenario provided by an embodiment of this utility model;

[0025] Figure 5 A schematic diagram of the structure of a tube sheet assembly tooling in a second usage scenario provided by an embodiment of this utility model;

[0026] Figure 6 A schematic diagram of a type of gap positioning component in a tube sheet assembly tooling provided in this embodiment of the utility model;

[0027] Figure 7 A schematic diagram of the structure of a type II clearance positioning component in a tube sheet assembly tooling provided in this embodiment of the utility model;

[0028] Figure 8 A schematic diagram of the structure of a gasket in a tube sheet assembly tooling provided in an embodiment of this utility model from a first-view perspective;

[0029] Figure 9 A schematic diagram of a gasket of a first thickness in a tube sheet assembly tooling provided in an embodiment of the present utility model from a second perspective.

[0030] Figure 10 This is a schematic diagram of a second-thickness gasket in a tube sheet assembly tooling provided in an embodiment of the present invention, viewed from a second perspective. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation method, structure, features and effects of a tube sheet assembly tooling proposed according to this utility model.

[0032] like Figures 1-5 As shown, this utility model embodiment provides a tube sheet assembly tooling for positioning the tube (10) and the plate (20). The plate (20) includes weld holes. The tube sheet assembly tooling includes:

[0033] A base (100) is provided with a plurality of movable slots (101), each movable slot (101) having a first end and a second end, and the plurality of movable slots (101) being close to each other in the direction from the second end to the first end;

[0034] Multiple gap positioning elements (200) are slidably embedded in the moving groove (101), and a portion of the structure of the gap positioning element (200) extends out of the moving groove (101). The gap positioning element (200) is used to connect the positioning of the pipe (10) and the plate (20) between the pipe (10) and the edge of the weld hole.

[0035] The base (100) is also provided with a welding hole (102), which is located between two moving grooves (101) and is used to correspond with the edge of the pipe (10) and the welding hole.

[0036] For ease of explanation, Figures 2-3 The dotted line section illustrates the structure and position of a specific pipe fitting (10) and plate (20). The pipe fitting (10) can be cylindrical, square, or other irregular cylindrical. The outer contour of the plate (20) is usually square and has a weld hole located in the center. The inner diameter of the weld hole is larger than the outer diameter of the pipe fitting (10), resulting in a gap between the edge of the weld hole and the pipe fitting (10). The size and uniformity of the gap can be determined as needed, and will be described later in conjunction with specific embodiments.

[0037] The base (100) can be of various shapes, including an approximately square plate structure as shown in the figure, with dimensions of 200mm x 200mm. The base (100) includes a top surface facing the operator during use, a bottom surface opposite the top surface, and a side surface surrounding the top and bottom surfaces. A moving groove (101) is formed on the top surface of the base (100). The moving groove (101) is an elongated groove, with its first and second ends located along its length. The phrase "multiple moving slots (101) approaching each other in the direction from the second end to the first end" means that the first ends of the moving slots (101) are close to each other, while the second ends are far apart; or that the multiple moving slots (101) extend from the edge of the base (100) toward the center of the base (100) in different directions; or that the multiple moving slots (101) extend from the center of the base (100) toward the side edge of the base (100) in different directions; or that the multiple moving slots (101) extend radially outward from the center of the base (100). The first ends of the moving slots (101) that are close to each other can be interconnected or spaced apart, that is, no moving slots (101) are provided in the central area of ​​the base (100).

[0038] The number of gap positioning elements (200) can be the same as or more than the number of moving grooves (101). A single gap positioning element (200) is slidably embedded in the moving groove (101). The gap positioning element (200) can change position by moving within the moving groove (101). Multiple gap positioning elements (200) can cooperate to adapt and fix pipe fittings (10) of various outer diameters. To prevent the gap positioning element (200) from detaching from the moving groove (101), in one embodiment, such as... Figure 3 As shown, the moving groove (101) includes a sliding area (1011) and a limiting area (1012). The width of the sliding area (1011) is greater than the width of the limiting area (1012). The area where the gap positioning member (200) is embedded in the moving groove (101) is adapted to the shape of the moving groove (101), thereby enabling the limiting area (1012) to confine part of the structure of the gap positioning member (200) within the moving groove (101) and prevent it from coming out of the moving groove (101). The gap positioning member (200) can be composed of multiple cylindrical structures stacked and connected axially. The part of the gap positioning member (200) located within the sliding area (1011) can be cylindrical or rectangular. The gap positioning member (200) can slidably abut against the sidewalls and bottom wall of the sliding area (1011).

[0039] The welding hole (102) is used for welding positioning. After the pipe fitting (10) and plate (20) are positioned, spot welding of the pipe fitting (10) and plate (20) is performed through the welding hole (102) to achieve assembly. The welding hole (102) penetrates the base (100), meaning it penetrates both the top and bottom surfaces of the base (100). Only one welding hole (102) needs to be provided, located between any two moving slots (101). Alternatively, multiple welding holes (102) can be provided as needed for spot welding positions.

[0040] The tube-plate assembly fixture proposed in this utility model mainly uses gap positioning components to position the tubes from different sides. The relative movement of these gap positioning components within a moving groove allows for welding of tubes with different outer diameters. The plate is fitted onto the outer circumference of the gap positioning components, fixing the gap between the edge of the welding hole and the tube, thereby fixing the relative position of the tube and plate. This fixture is applicable to welding and assembling tubes and plates of different diameters. The fixture is simple to operate, improves work efficiency, and has good stability, effectively preventing movement of the tubes and plates during welding assembly, improving welding quality and ensuring assembly accuracy. Furthermore, the fixture has a simple structure, low cost, and is easy to manufacture and maintain.

[0041] The tube sheet assembly tooling described in this application is applicable to various scenarios. For example, in vocational skills examinations, it can meet the requirements of tube sheet welding tests at different levels and with varying demands, allowing candidates to operate on familiar tooling for more accurate skill assessment. In industrial production, it is suitable for small-batch, multi-variety tube sheet welding production tasks, especially for customized product manufacturing. It enables rapid switching between production of tube sheet assemblies of different sizes, improving production flexibility and market competitiveness. In scientific research experiments, it facilitates researchers in studying and testing welding processes for tube sheets of different sizes, obtaining more comprehensive and accurate data.

[0042] The specific extension direction and number of the moving slots (101) can be set in various ways, such as multiple moving slots (101) extending to the same point on the base (100), such as extending to the geometric center point of the top surface of the square base (100), and the included angle of the extension directions of any two adjacent moving slots (101) is the same.

[0043] For example, there are three moving slots (101), with adjacent moving slots (101) spaced 120 degrees apart. Alternatively, there can be four, five or even more moving slots (101), but too many moving slots (101) will lead to complicated operation, difficult processing, and difficulty in controlling precision.

[0044] The second ends of the plurality of movable slots (101) may extend only to the side wall near the base (100), and the gap positioning element (200) may not need to be replaced, which is suitable for situations where the gap between the pipe (10) and the plate (20) does not need to be adjusted. Alternatively, in one embodiment, the second ends of the plurality of movable slots (101) penetrate the side wall of the base (100), that is, there is an opening on the side wall of the base (100), and the gap positioning element (200) can be inserted into the movable slot (101) through the opening on the side wall of the base (100) or moved out of the movable slot (101), thereby enabling the replacement of the gap positioning element (200).

[0045] In one embodiment, the plurality of gap positioning elements (200) include at least two types of positioning elements. The different types of positioning elements all include a sliding part (210) and a positioning part (220) connected to the sliding part (210). The sliding part (210) is slidably connected to the moving groove (101), and the positioning part (220) extends out of the moving groove (101). The sliding part (210) of the different types of positioning elements has the same structure, and the radial cross-sectional area of ​​the positioning part (220) of the different types of positioning elements is different.

[0046] The sliding part (210) is the portion of the gap positioning element (200) embedded in the moving groove (101). The positioning part (220) extends out of the moving groove (101) and is used to contact the edge of the weld hole of the pipe fitting (10) and the plate (20). The sliding part (210) has the same structure and can be adapted to the structure of the moving groove (101). The positioning part (220) has a different cross-section, which can be used to meet the distance requirements between the edges of different pipe fittings (10) and weld holes. If multiple gap positioning elements (200) include first-class positioning elements and second-class positioning elements, it can be understood that more types of positioning elements can also be included. The number of first-class positioning elements and second-class positioning elements can be the same as the number of moving grooves (101), such as three each. First-class positioning elements are as follows: Figure 6 As shown, the second type of positioning component is as follows: Figure 7 As shown, the positioning part (220) of both the first-class positioning part and the second-class positioning part is a cylinder. The outer diameter of the positioning part (220) of the first-class positioning part is larger than that of the positioning part (220) of the second-class positioning part, or in other words, the positioning part (220) of the first-class positioning part is thicker than that of the second-class positioning part.

[0047] For example, the positioning part (220) can be set with various gap positioning elements (200) with outer diameters of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm and 7mm, and each gap positioning element (200) can be set in 3 pieces.

[0048] In use, three similar gap positioning parts (200) can be used, so that the gap between the weld hole edges of the pipe fitting (10) and the plate (20) is uniform, such as Figure 4 As shown. Alternatively, a different type of clearance locator (200) can be used, such as Figure 5 As shown, the outer diameter of the positioning part (220) of the upper gap positioning element (200) is larger than the outer diameter of the positioning parts (220) of the two lower gap positioning elements (200), resulting in a gap between the weld holes of the pipe fitting (10) and the plate (20) that is larger at the top and smaller at the bottom. Alternatively, by adjusting the gap positioning element (200), the gap can also be made smaller at the top and larger at the bottom or larger on the left and smaller on the right. The gap positioning element (200) can be selected according to the operator's own skill level to ensure that the root pass is fully penetrated.

[0049] In one embodiment, the opening width of the welding hole (102) at the end furthest from the edge of the base (100) is smaller than the opening width of the welding hole (102) at the end closest to the edge of the base (100), thereby accommodating larger pipe fittings (10) for welding over a longer area. For example, the upper edge width of the welding hole (102) is 5 mm, the lower edge width is 30 mm, the length of the welding hole (102) is 70 mm, and the welding hole (102) is trapezoidal in shape.

[0050] In one implementation, such as Figures 8-10As shown, the tooling also includes: a gasket (300), which is a circular gasket and is used to support the tube between the tube and the base (100).

[0051] There are multiple gaskets (300), and the thickness of different gaskets (300) is different. For example, the tooling includes three stainless steel circular gaskets (300) of different thicknesses. Due to the characteristics of tube-plate welding, if the pipe fitting (10) and the plate (20) are welded on the same plane before welding, the heat concentration after welding will cause the bottom plane of the pipe fitting (10) to protrude much from the bottom plane of the plate (20), and the weld protrusion may exceed the specified value. Therefore, during assembly, the pipe fitting (10) can be raised by using gaskets (300) so that the bottom plane of the pipe fitting (10) is concave to the bottom plane of the plate (20). This can satisfy the requirement that the back weld protrusion value is within the standard range, meet the scoring criteria, and improve the weld quality. The thickness of the gasket (300) is 0.1mm to 1.0mm. It can be the same amount of inward shrinkage or the smaller amount of inward shrinkage at the 6-point arc start point and the larger amount of inward shrinkage at the 12-point positioning point. The thickness of the gasket (300) can be selected according to the operator's technical level and habits to ensure that the weld reinforcement on the back side does not exceed the standard.

[0052] In use, adjust the base (100) to make it level. Place the ground pipe fitting (10) in the center of the base (100), then select a gap positioning piece (200) of appropriate thickness and install it into the moving groove (101), and move it until the column is close to the pipe fitting (10). Adjust the pipe fitting (10) and the gap positioning piece (200) to confirm the positioning position. Raise the pipe fitting (10) slightly and put in a suitable shim (300). Then, precisely nest the ground and enlarged plate (20) with the required size welding hole on the outside of the positioning part (220) of the gap positioning piece (200) until the plate (20) fits against the base (100). Spot weld at the welding hole (102) to finally assemble the pipe fitting (10) and the plate (20). After assembly, clean, maintain and tidy the tooling, and check the wear and looseness of each part.

[0053] In addition, during processing, precision machining processes are used to manufacture components such as the base (100), gasket (300), and clearance positioning component (200) to ensure dimensional accuracy and surface quality. The moving groove (101) is lubricated to ensure smooth rotation and movement of the clearance positioning component (200).

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tube sheet assembly tooling, characterized in that, The tube sheet assembly tooling includes: A base (100) is provided with a plurality of movable slots (101), each movable slot (101) having a first end and a second end, and the plurality of movable slots (101) being close to each other in the direction from the second end to the first end; Multiple gap positioning elements (200) are slidably embedded in the moving groove (101), and a portion of the structure of the gap positioning element (200) extends out of the moving groove (101); The base (100) is also provided with a welding hole (102), which is located between the two moving slots (101).

2. The tube sheet assembly tooling according to claim 1, characterized in that, The multiple movable slots (101) all extend toward the same point on the base (100), and the included angle between the extension directions of any two adjacent movable slots (101) is the same.

3. The tube sheet assembly tooling according to claim 2, characterized in that, The number of the moving slots (101) is three.

4. The tube sheet assembly tooling according to claim 1, characterized in that, The first ends of the plurality of movable slots (101) are spaced apart, and the second ends of the movable slots (101) penetrate the side wall of the base (100).

5. The tube sheet assembly tooling according to claim 1, characterized in that, The plurality of gap positioning elements (200) include at least two types of positioning elements. The positioning elements of different types all include a sliding part (210) and a positioning part (220) connected to the sliding part (210). The sliding part (210) is slidably connected to the moving groove (101). The positioning part (220) extends out of the moving groove (101). The sliding part (210) of the positioning elements of different types has the same structure, and the radial cross-sectional area of ​​the positioning part (220) of the positioning elements of different types is different.

6. The tube sheet assembly tooling according to claim 5, characterized in that, The positioning part (220) is a cylinder, and the outer diameter of the positioning part (220) of different types of positioning members is different.

7. The tube sheet assembly tooling according to claim 1, characterized in that, The welding hole (102) passes through the base (100).

8. The tube sheet assembly tooling according to claim 7, characterized in that, The opening width of the welding hole (102) at the end away from the edge of the base (100) is smaller than the opening width of the welding hole (102) at the end near the edge of the base (100).

9. The tube sheet assembly tooling according to claim 1, characterized in that, Also includes: A gasket (300), which is a circular gasket, is used to support the tube between the tube and the base (100).

10. The tube sheet assembly tooling according to claim 9, characterized in that, There are multiple gaskets (300), and the thickness of each gasket (300) is different.

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