Self-tightening type torsion spring supporting device
By using a combination of self-tightening torsion spring support device and porcelain ball and check support rod in the tube heat exchanger reactor, the existing support device occupies space and is unfavorable for maintenance, and a convenient installation and simplified maintenance process is achieved.
Patent Information
- Application Number
- CN202510154262.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-05-02
AI Technical Summary
The support device of the existing tube heat exchanger reactor occupies the equipment's reaction space and is not conducive to the maintenance of the equipment. It requires full removal of the equipment for maintenance when the catalyst leaks.
The self-tightening torsion spring support device is adopted. The torsion spring is pressed and stuck to the inner wall of the heat exchange tube by the weight of the catalyst. It combines multiple porcelain balls and check support rods to prevent the catalyst from leaking and bounceing in reverse.
Save the reaction space of the equipment and facilitate installation and maintenance. If the heat exchange pipe leaks, just remove part of the leaked catalyst, simplifying the equipment maintenance process.
Smart Images
Figure CN119915136A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sealing mechanisms, and in particular to a self-tightening torsion spring supporting device. Background Art
[0002] In the oil refining, petrochemical, fine chemical and other industries, the catalyst of the shell-and-tube heat exchanger reactor is installed in the heat exchange tube. When the material flows through the heat exchange tube, it contacts with the catalyst to realize the reaction. In order to prevent the catalyst from flowing downward and not affecting the flow of the material, a support device needs to be set.
[0003] The existing support device mainly adopts a grid support set at the lower tube box and a wire mesh is laid above the grid to prevent catalyst leakage. The previous structure not only occupies the equipment reaction space, but also is not conducive to the inspection and maintenance of the equipment. If the tube head of the shell-and-tube heat exchanger reactor equipment leaks, the catalyst must be completely removed before the equipment can be repaired. Summary of the invention
[0004] The present invention aims at solving the deficiencies of the prior art and provides a self-tightening torsion spring supporting device.
[0005] The present invention is achieved through the following technical scheme, which provides a self-tightening torsion spring support device, including a vertical heat exchange tube, in which a granular catalyst is loaded, and also includes a torsion spring inserted into the lower end of the heat exchange tube, the torsion spring includes a conical section and a cylindrical section connected up and down, the middle diameter of the conical section gradually decreases from bottom to top, the lower end of the heat exchange tube is provided with a large diameter section and a small diameter section arranged up and down, the inner diameter of the large diameter section is larger than the inner diameter of the small diameter section, the upper end of the cylindrical section is located in the large diameter section, the outer diameter of the lower end of the conical section is equal to the outer diameter of the cylindrical section and is equal to or smaller than the inner diameter of the small diameter section.
[0006] In this scheme, the middle diameter of the conical section gradually decreases from bottom to top, and the weight of the catalyst presses down on the conical section, causing the conical section to be compressed, and the spiral gap of the conical section gradually shrinks, thereby preventing the catalyst particles from falling. While the conical section is compressed, the upper end of the cylindrical section is pressed down to increase its outer diameter and exceed the inner diameter of the small diameter section, thereby being stuck at the lower end of the large diameter section to prevent it from falling out. The outer diameter of the lower end of the conical section is equal to the outer diameter of the cylindrical section and is equal to or smaller than the inner diameter of the small diameter section, in order to facilitate the insertion of the torsion spring from the lower end of the heat exchange tube.
[0007] As an optimization, a plurality of ceramic balls are installed between the torsion spring and the catalyst, and the diameter of the ceramic balls is larger than the diameter of the catalyst. The ceramic balls provided in this scheme are to support the catalyst. When the catalyst is just loaded, due to its small weight, the downward pressure is insufficient, thereby preventing the catalyst from falling from the conical section due to insufficient compression of the conical section.
[0008] As an optimization, a non-return support rod is fixed in the cylindrical section, and the non-return support rod extends to the inner circle of the cylindrical section. The non-return support rod provided in this solution is to avoid catalyst leakage caused by medium fluctuation and reverse ejection after overload during equipment operation.
[0009] As an optimization, the non-return support rod is arranged horizontally and fixedly connected to the lower end of the cylindrical section. In this solution, it is arranged at the lower end, which is convenient for arrangement, and the spring end at the lower end of the cylindrical section can be directly bent to the inner ring.
[0010] As an optimization, the lower end of the heat exchange tube is fixedly connected to the lower tube sheet by a tube expansion process, and the expanded position forms a large diameter section. In this solution, the lower end of the heat exchange tube is fixedly connected to the lower tube sheet by tube expansion, and a large diameter section is formed at the same time.
[0011] As an optimization, the outer diameter of the cylindrical section is 0.85-0.98 times the inner diameter of the small diameter section, so that the torsion spring can be easily inserted and the torsion spring can be easily clamped at the upper end of the small diameter section after being compressed.
[0012] As an optimization, the outer diameter of the smaller circle in any two adjacent circles of the conical section is D1, the inner diameter of the larger circle is D2, the diameter of the catalyst is D, D2>D1, and D2-D1<2D, thereby preventing the catalyst from leaking between two adjacent circles.
[0013] The beneficial effects of the present invention are as follows: a self-tightening torsion spring support device of the present invention utilizes the catalyst's own gravity to compress the torsion spring and clamp it to the inner wall of the heat exchange tube, thereby saving the reaction space of the equipment and facilitating installation. For the subsequent maintenance of the equipment, it can save a lot of manpower and material resources, save the reaction space of the equipment and facilitate installation, which is convenient for the subsequent maintenance of the equipment. If the heat exchange tube leaks, it is only necessary to clear the catalyst in the leaking heat exchange tube. The structure is simple and convenient for equipment inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 It is a front view of the torsion spring of the present invention; Figure 3 A top view of the torsion spring of the present invention; Figure 4 This is a schematic diagram of the installation position of the present invention; As shown in the figure: 1. Torsion spring, 2. Heat exchange tube, 3. Catalyst, 4. Ceramic ball, 5. Lower tube plate, 11. Cylindrical section, 12. Conical section, 13. Check support rod, 21. Large diameter section, 22. Small diameter section. DETAILED DESCRIPTION
[0015] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.
[0016] like Figures 1 to 4 As shown, a self-tightening torsion spring support device of the present invention includes a vertical heat exchange tube 2, such as Figure 4 As shown, each heat exchanger is provided with a plurality of parallel heat exchange tubes 2, the upper end of the heat exchange tube 2 passes through the upper tube sheet, and the lower end passes through the lower tube sheet 5, as shown in FIG. Figure 1 As shown, at the position where the heat exchange tube 2 passes through the lower tube plate 5, the heat exchange tube 2 is expanded from the inside to the outside, so that the inner diameter and the outer diameter of this part are increased, on the one hand to achieve a fixed connection between the heat exchange tube 2 and the lower tube plate 5, and on the other hand to facilitate the subsequent installation and support of the torsion spring 1. The heat exchange tube 2 is filled with a granular catalyst 2, and the present application is used to support the catalyst, and each heat exchange tube is supported separately. If a heat exchange tube leaks, only the catalyst in the leaked heat exchange tube needs to be cleared, and the other heat exchange tubes will not be affected.
[0017] It also includes a torsion spring 1 inserted into the lower end of the heat exchange tube 2. The torsion spring 1 should be made of stainless steel material with good elasticity and plasticity. The torsion spring 1 is made of a stainless steel wire, including a conical section 12 and a cylindrical section 11 connected up and down. In a free state, the outer diameters of the cylindrical section 11 are equal at all locations, and the middle diameter of the conical section 12 gradually decreases from bottom to top. Of course, the outer diameter also gradually decreases from bottom to top.
[0018] The lower end of the heat exchange tube 2 is provided with a large diameter section 21 and a small diameter section 22 arranged up and down, and the inner diameter of the large diameter section 21 is larger than the inner diameter of the small diameter section 22. In this embodiment, since the lower end of the heat exchange tube 2 is fixedly connected to the lower tube plate 5 through the tube expansion process, the large diameter section 21 is formed at the tube expansion position, and the small diameter section 22 is formed at the lowermost end of the heat exchange tube 2 that is not expanded.
[0019] The outer diameter of the lower end of the conical section 12 is equal to the outer diameter of the cylindrical section 11 and is equal to or smaller than the inner diameter of the small diameter section 22. In this embodiment, the outer diameter of the cylindrical section 11 of the torsion spring 1 is 0.85-0.98 times the inner diameter of the small diameter section 22, so the entire torsion spring 1 can be placed from the lower end of the heat exchange tube.
[0020] After the torsion spring 1 is placed inside the heat exchange tube, the upper end of the cylindrical section 11 is located inside the large diameter section 21, so part of the cylindrical section 11 is compressed, and the diameter increases after compression, thereby getting stuck at the upper end of the small diameter section 22, preventing the torsion spring 1 from falling out downward.
[0021] The outer diameter of the smaller circle of any two adjacent circles in the conical section 12 is D1, and the inner diameter of the larger circle is D2, and D2>D1. Therefore, after the conical section 12 is compressed, the upper circle can enter the lower circle. The diameter of the catalyst 2 is D, and D2-D1<2D. Therefore, when the conical section 12 is pressed into a flat shape, it is spiral on a plane, and the gap between adjacent spirals is larger than the diameter D of the catalyst 2, so that the catalyst 2 cannot pass through.
[0022] Since the weight of the catalyst is small when the catalyst is initially added, the compression amount of the conical section 12 is small. In order to prevent the catalyst from passing through the gap, a plurality of ceramic balls 4 are installed between the torsion spring 1 and the catalyst 2. The diameter of the ceramic balls 4 is larger than the diameter of the catalyst 2.
[0023] A non-return support rod 13 is fixedly connected to the cylindrical section 11, and the non-return support rod 13 extends to the inner circle of the cylindrical section 11. Figure 3 As shown, one end of the non-return support rod 13 is connected to the cylindrical section 11, and the other end extends to the inner circle. The non-return support rod 13 is horizontally arranged and passes through the center position of the cylindrical section 11. In this embodiment, the non-return support rod 13 is horizontally arranged and fixedly connected to the lower end of the cylindrical section 11, and can be formed by bending inward at the end of the cylindrical section 11.
[0024] The non-return support rod 13 is provided to prevent catalyst leakage due to medium fluctuation and reverse ejection after overloading during equipment operation. When the medium fluctuates or is overloaded, due to excessive pressure, the cone section is driven downward into the cylindrical section by pressure. When the pressure continues to be pressed down, the gap between the cone sections 12 increases, which easily leads to catalyst leakage. Therefore, the non-return support rod 13 is provided to support the cone section in this state.
[0025] Method of use of the present invention: The heat exchange tube 2 is connected to the lower tube plate 5 by expanding the tube, and a large diameter section is formed inside the heat exchange tube 2. During the initial installation, the torsion spring 1 is first placed at the lower end of the heat exchange tube. At this time, the lower end of the torsion spring 1 is nearly flush with the lower end of the heat exchange tube, and the torsion spring 1 is in a free state. The upper end of the cylindrical section 11 is located in the large diameter section 21, and then the ceramic ball 4 is placed. After the ceramic ball 4 is submerged in the upper end of the large diameter section 21, the catalyst is added. Through the weight of the catalyst and the ceramic ball, the spiral gap of the conical section of the torsion spring 1 is gradually reduced, thereby preventing the catalyst particles from falling. While the conical section is compressed, the upper end of the cylindrical section is pressed down to increase its outer diameter and exceed the inner diameter of the small diameter section, thereby being stuck at the lower end of the large diameter section to prevent it from falling out.
[0026] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.
Claims
1. A self-tightening torsion spring support device, comprising a vertical heat exchange tube (2), wherein a granular catalyst (2) is contained in the heat exchange tube (2), characterized in that: It also comprises a torsion spring (1) inserted into the lower end of the heat exchange tube (2), the torsion spring (1) comprising a conical section (12) and a cylindrical section (11) connected up and down, the median diameter of the conical section (12) gradually decreasing from bottom to top, the lower end of the heat exchange tube (2) is provided with a large diameter section (21) and a small diameter section (22) arranged up and down, the inner diameter of the large diameter section (21) is larger than the inner diameter of the small diameter section (22), the upper end of the cylindrical section (11) is located inside the large diameter section (21), and the outer diameter of the lower end of the conical section (12) is equal to the outer diameter of the cylindrical section (11) and is equal to or smaller than the inner diameter of the small diameter section (22).
2. A self-tightening torsion spring support device according to claim 1, characterized in that: A plurality of ceramic balls (4) are arranged between the torsion spring (1) and the catalyst (2), and the diameter of the ceramic balls (4) is greater than the diameter of the catalyst (2).
3. A self-tightening torsion spring support device according to claim 1, characterized in that: A non-return support rod (13) is fixedly connected inside the cylindrical section (11), and the non-return support rod (13) extends to the inner circle of the cylindrical section (11).
4. A self-tightening torsion spring support device according to claim 3, characterized in that: The non-return support rod (13) is arranged horizontally and fixedly connected to the lower end of the cylindrical section (11).
5. The self-tightening torsion spring support device according to claim 1, characterized in that: The lower end of the heat exchange tube (2) is fixedly connected to the lower tube plate (5) through a tube expansion process, and the expanded position forms a large diameter section (21).
6. A self-tightening torsion spring support device according to claim 1, characterized in that: The outer diameter of the cylindrical section (11) is 0.85-0.98 times the inner diameter of the small diameter section (22).
7. A self-tightening torsion spring support device according to claim 1, characterized in that: The outer diameter of the smaller circle of any two adjacent circles in the conical section (12) is D1, the inner diameter of the larger circle is D2, the diameter of the catalyst (2) is D, D2>D1, and D2-D1<2D.