Tube sheet fixing device for heat exchange tube

Abstract

The utility model relates to a kind of pipe plate fixing device for penetrating heat exchange tube, including frame, bottom beam, support block, fixed assembly, the side portion of frame forms the positioning part for the positioning of pipe plate;Bottom beam one end is connected in the bottom of frame positioning part;Support block is used to support pipe plate;Fixed assembly is connected on the positioning part of frame, and fixed assembly includes at least one fixed rod, fixed rod is connected on frame, and fixed hole is opened on fixed rod.The utility model changes dynamic hoisting into static rigid fixation for pipe plate, completely eliminates the risk of high-altitude falling object and heavy object shaking, avoids the damage of the characteristics of simple support spot welding fixation to base material, avoids the defects that temporary tooling is placed limit big, poor stability, easy to tip, verticality is difficult to guarantee;Realize pipe plate fast, stable and in position, without repeated adjustment, waste working hours;Tooling can adapt to multiple models, size pipe plate, strong adaptability, and can be reused, there is no situation that it is wasted after use, save cost.

Description

Technical Field

[0001] This utility model relates to the field of heavy pressure vessel manufacturing technology, and in particular to a tube sheet fixing device for heat exchange tubes. Background Technology

[0002] With the development of chemical, new energy and other fields, pressure vessels, as core equipment, are trending towards larger sizes. Their tube sheet diameters can reach several meters and their weights can reach tens of tons. Especially in the manufacturing process of shell and tube heat exchangers, the connection quality between the tube sheet and the heat exchange tubes is the lifeline for the safe and reliable operation of the equipment. As the core component connecting the shell and the heat exchange tubes, the tube sheet faces many process contradictions in the manufacturing process when the tubes are inserted and fixed.

[0003] In the manufacturing process of shell-and-tube heat exchangers, the precise, efficient, and damage-free insertion of a large number of heat exchange tubes into the tube holes of the tube sheet is the core process in the final assembly stage and a key point for quality control. Currently, the common practice is to place the tube sheet directly on the ground, manually support it, perform temporary spot welding, or use a simple support frame, then use a crane to lift the tube bundle for insertion. This method has many drawbacks: 1. Extremely poor safety: Using a crane to lift the tube sheet for pipe threading causes the tube sheet to sway, posing a serious safety threat to the operators. Once it becomes unstable, the consequences are unimaginable.

[0004] 2. Poor positioning accuracy: The tube sheet is difficult to adjust to an absolutely horizontal position, causing the heat exchange tubes to sag due to their own weight. There is an angle between their axis and the tube hole axis, making it difficult to insert the tubes. It is very easy to scratch the inner wall of the tube hole and the surface of the heat exchange tubes, affecting the quality of subsequent expansion joints or tube head welding, and causing potential equipment hazards.

[0005] 3. Extremely low efficiency: It requires multiple workers to use tools such as pry bars to continuously adjust the position of the tube sheet, which is labor-intensive, time-consuming, and the adjustment process relies on experience and is difficult to control precisely.

[0006] Therefore, a special fixture is needed that can achieve rapid and accurate positioning and stable support. Summary of the Invention

[0007] The purpose of this invention is to provide a tube sheet fixing device for heat exchange tubes, suitable for fixing tube sheets of large pressure vessels, such as tube sheets with a diameter of more than 2 meters and a weight of more than 5 tons.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A tube sheet fixing device for heat exchanger tubes, comprising: The frame has a positioning part formed on one side for positioning the tube sheet. A bottom beam, one end of which is connected to the bottom of the frame positioning part; Support blocks are used to support the tube sheet; A fixing component is connected to the positioning part of the frame. The fixing component includes multiple fixing rods, which are connected to the frame and have fixing holes.

[0009] Preferably, in the above technical solution, the device further includes a moving component, which includes a guide rail and a support trolley. The guide rail is disposed on both sides of the bottom beam, and the support trolleys are respectively movably disposed on the guide rail. The support block and the support trolleys on both sides together form a support for the bottom of the tube sheet.

[0010] More preferably, the movable component further includes a first connecting rod that connects the two sides of the support vehicle into one unit, and the support block is disposed in the middle of the first connecting rod.

[0011] More preferably, the support vehicle is provided with at least one roller, which is used to support the bottom of the tube sheet.

[0012] More preferably, the support vehicle is provided in two sets, and the two sets of support vehicles are connected by a second connecting rod.

[0013] Preferably, in the above technical solution, the fixing rod includes a first fixing rod and a second fixing rod. The first fixing rod extends horizontally and its two ends are fixed to the frame. The second fixing rod extends vertically, with one end fixed to the frame and the other end fixed to the first fixing rod.

[0014] Preferably, in the above technical solution, the frame of the positioning part is also provided with fixing holes.

[0015] Preferably, in the above technical solution, the fixing hole is an elliptical hole.

[0016] Preferably, in the above technical solution, the support block is disposed in the middle of the bottom beam.

[0017] Preferably, the device further includes a ladder connected to the frame and located near the positioning part.

[0018] Preferably, the device further includes a ladder, and a guide rail is provided between the bottom and both sides of the frame, with the ladder movably mounted on the guide rail.

[0019] To achieve the above objectives, the present invention adopts the following technical solution: A tube sheet fixing device for heat exchanger tubes, comprising: The frame has positioning parts formed on opposite sides for positioning the tube sheet. The bottom beams are located on both sides of the frame, and one end of each bottom beam is connected to the bottom of the frame positioning part. Support blocks are used to support the tube sheet; The fixing components are respectively connected to the positioning part of the frame. Each fixing component includes at least one fixing rod, which is connected to the frame and has fixing holes.

[0020] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This invention transforms the tube sheet from dynamic hoisting to static rigid fixing, completely eliminating the risks of falling objects from heights and swaying heavy objects. It also avoids the damage to the base material caused by the characteristics of simple bracket spot welding fixing, and avoids the defects of temporary tooling, such as large placement restrictions, poor stability, easy tilting, and difficulty in ensuring verticality.

[0021] This invention enables rapid and stable placement of tube sheets without repeated adjustments, thus saving time. The tooling is adaptable to tube sheets of various models and sizes, making it highly adaptable. It is also reusable, eliminating the problem of using and discarding the tube sheets after use, thereby saving costs. Attached Figure Description

[0022] Appendix Figure 1 This is a front view schematic diagram of Embodiment 1; Appendix Figure 2 This is a side view schematic diagram of Embodiment 1; Appendix Figure 3 For the appendix Figure 1 Enlarged view of the middle section (I); Appendix Figure 4 This is a front view schematic diagram of Embodiment 2; Appendix Figure 5 This is a side view of Example 2; Appendix Figure 6 , 7 This is a front view schematic diagram of Embodiment 3; Appendix Figure 8 , 9 This is a front view schematic diagram of Example 4.

[0023] In the attached diagrams above: 1. Frame; 10. Positioning part; 11. Fixing hole; 2. Bottom beam; 3. Support block; 40. First fixing rod; 41. Second fixing rod; 42. Fixing hole; 50. Ladder; 51. Guide rail; 60. Guide rail; 61. Support carriage; 610. Roller; 62. First connecting rod; 63. Second connecting rod; 7. Fasteners; 8. Tube sheet. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1:

[0026] like Figure 1 , 2 The tube sheet fixing device shown mainly includes a frame 1, a base beam 2, a support block 3, a fixing assembly, and a ladder 50. The following is a detailed description of each component: Frame 1 is specifically a rectangular structure, connected by rods to form the rectangular frame 1 shown in the figure. One side of frame 1 forms a positioning part 10 for positioning the tube sheet. Figure 1 A positioning part 10 is formed on the left side of the middle frame 1.

[0027] One end of the bottom beam 2 is connected to the bottom of the positioning part 10 of the frame 1.

[0028] Support block 3 is located in the middle of bottom beam 2 and is used to support the tube sheet.

[0029] The fixing component is connected to the positioning part 10 of the frame 1. The fixing component includes multiple fixing rods, at least three, which are connected to the frame 1 and have fixing holes 42. Figure 2As shown: In this embodiment, the fixing rod includes a first fixing rod 40 and a second fixing rod 41. The first fixing rod 40 extends horizontally and its two ends are fixed to the frame 1. In the figure, one first fixing rod 40 is provided. The second fixing rod 41 extends vertically, one end of which is fixed to the frame 1 and the other end is fixed to the first fixing rod 10. In the figure, two second fixing rods 41 are provided. Both the first fixing rod 40 and the second fixing rod 41 are provided with fixing holes 42. The fixing holes 42 are elliptical holes, which can adjust the tightness of the connection and also precisely adjust the verticality of the tube sheet.

[0030] Since only one first fixing rod 40 is provided and the fixing hole positions are asymmetrical, in this embodiment, a fixing hole 11 is also provided on the top frame 1 of the positioning part 10 to save the number of fixing rods. The multi-point fixing structure can ensure the concentricity of the tube bundle during the tube insertion process, as well as the center position of the front and rear tube plates and the rapid correspondence of the four quadrants, thereby improving the product quality and production efficiency of the entire tube bundle from the source.

[0031] The ladder 50 is attached to the frame 1 and close to the positioning part 10 for the operator to climb, and is connected to the fixing holes 11 and 42 at the high position.

[0032] In use, first drill holes in the (front) tube sheet to facilitate connection with fixing holes 11 and 42. Then, hoist the (front) tube sheet onto the support block 3. Align the fixing holes 11 and 42 according to the positions of the holes on the (front) tube sheet. The (front) tube sheet and fixing holes 11 and 42 are quickly and stably connected and fixed using fasteners (bolts and nuts). Figure 3 As shown, this ensures the (front) tube sheet is securely fixed. Example 2:

[0033] This embodiment is basically the same as Embodiment 1, except that: Figure 4 , 5 As shown: In this embodiment, the device also includes a moving component, which can facilitate the movement of the tube sheet to the positioning part 10 of the frame 1, reducing the difficulty of hoisting, and also facilitates quick separation from the device after the tube is inserted.

[0034] The movable component includes a guide rail 60, a support carriage 61, and a first connecting rod 62. The guide rail 60 is set on both sides of the bottom beam 2, that is, two guide rails 60 are set. The support carriages 61 are movably set on the guide rail 60 respectively. The first connecting rod 62 connects the two support carriages 61 into one unit. The support block 3 is set in the middle of the first connecting rod 62. The support block 3 and the two support carriages 61 together form a support for the bottom of the tube sheet.

[0035] In a preferred embodiment of this invention, the support carriage 61 is provided with at least one roller 610. The roller 610 is used to support the bottom of the tube sheet, that is, the bottom of the tube sheet is supported by rolling support through the roller 610, which facilitates the position adjustment of the tube sheet and quick alignment with the fixing holes 11 and 42. In the figure, two rollers 610 are provided on one support carriage 61, and the distribution of the two rollers 610 is in contact with the arc circumference of the tube sheet.

[0036] In another preferred embodiment of this example: two sets of support carts 61 are provided, that is, four support carts 61, and the two sets of support carts 61 are connected into one unit by a second connecting rod 63. In the figure, the support cart 61 on the right is used to support the tube sheet. After the heat exchange tubes are inserted into the tube sheet, the weight on the left side increases. If only one set of support carts 61 is provided, it is easy to tip over to the left. By providing another set of support carts 61 on the left side, the heat exchange tubes can be supported, so that the force of the support is balanced. Example 3:

[0037] This embodiment is basically the same as embodiments one, two, and three, except that in this embodiment, the opposite sides of the frame 1 form positioning parts 10 for positioning the tube sheet, such as... Figure 6 , 7 As shown, this allows for the simultaneous installation of tubes in two sets of tube sheets. Example 4:

[0038] This embodiment is basically the same as Embodiments 1, 2, and 3, except that: Figure 8 , 9 As shown: In this embodiment, a guide rail 51 is provided at the bottom of the frame 1 and between its two sides, and the ladder 50 is movably mounted on the guide rail 51 to facilitate movement between the two sides of the frame.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tube sheet fixing device for heat exchanger tubes, characterized in that: include: The frame has a positioning part formed on one side for positioning the tube sheet; A bottom beam, one end of which is connected to the bottom of the frame positioning part; Support blocks are used to support the tube sheet; A fixing component is connected to the positioning part of the frame. The fixing component includes multiple fixing rods, which are connected to the frame and have fixing holes.

2. The tube sheet fixing device for heat exchanger tubes according to claim 1, characterized in that: The device further includes a moving component, which includes a guide rail and a support trolley. The guide rail is disposed on both sides of the bottom beam, and the support trolleys are respectively movably disposed on the guide rail. The support block and the support trolleys on both sides together form a support for the bottom of the tube sheet.

3. The tube sheet fixing device for heat exchanger tubes according to claim 2, characterized in that: The movable component also includes a first connecting rod that connects the two sides of the support vehicle into one unit, and the support block is disposed in the middle of the first connecting rod.

4. The tube sheet fixing device for heat exchanger tubes according to claim 2, characterized in that: The support vehicle is equipped with at least one roller, which is used to support the bottom of the tube sheet.

5. The tube sheet fixing device for heat exchanger tubes according to claim 2, characterized in that: The support vehicle is provided in two sets, and the two sets of support vehicles are connected by a second connecting rod.

6. The tube sheet fixing device for heat exchanger tubes according to claim 1, characterized in that: The fixing rod includes a first fixing rod and a second fixing rod. The first fixing rod extends horizontally and its two ends are fixed to the frame. The second fixing rod extends vertically, with one end fixed to the frame and the other end fixed to the first fixing rod.

7. The tube sheet fixing device for heat exchanger tubes according to claim 1, characterized in that: The positioning part frame is also provided with fixing holes; The fixing hole is an elliptical hole.

8. The tube sheet fixing device for heat exchanger tubes according to claim 1, characterized in that: The support block is located in the middle of the bottom beam.

9. The tube sheet fixing device for heat exchanger tubes according to claim 1, characterized in that: The device also includes a ladder connected to the frame and located near the positioning part; or The frame has guide rails at its bottom and between its two sides, and the ladder is movably mounted on the guide rails.

10. A tube sheet fixing device for heat exchanger tubes, characterized in that: include: The frame has positioning parts formed on opposite sides for positioning the tube sheet. The bottom beams are located on both sides of the frame, and one end of each bottom beam is connected to the bottom of the frame positioning part. Support blocks are used to support the tube sheet; The fixing components are respectively connected to the positioning part of the frame. Each fixing component includes at least one fixing rod, which is connected to the frame and has fixing holes.

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