An easy-to-install and disassemble anti-wear sleeve

Abstract

This utility model discloses a wear-resistant sleeve that is easy to assemble and disassemble, including a sleeve body, positioning and mounting fins, heat-resistant insulation material, heat exchange tube, tube sheet, and refractory material. The sleeve body is installed at the flue gas inlet end of the heat exchange tube, and the inner end of the sleeve passes through the heat exchange tube. The port inside the heat exchange tube is a flared trumpet shape with four evenly distributed slots around the circumference. The bottom sharp corner of the flared end of the sleeve is processed into a straight edge so that it can completely fit the inner wall of the heat exchange tube. The outer port is a trumpet shape with a flared end. Positioning and mounting fins are installed on the outer side of the part of the sleeve that extends out of the heat exchange tube. The positioning and mounting fins are engaged with the upper part of the heat exchange tube. In this design, the inner end of the anti-wear sleeve is shaped like a flared mouth with grooves cut evenly in the circumferential direction. This gives the inner flared mouth a certain degree of elasticity in the diameter direction, allowing the sleeve to be compressible during disassembly and assembly. The grooved flared mouth prevents the sleeve from getting stuck against the inner wall of the heat exchange tube, facilitating the disassembly and assembly of the sleeve, reducing the installation and maintenance time of the anti-wear sleeve, and effectively saving manpower and resources.

Description

Technical Field

[0001] This utility model relates to the technical field of high-temperature heat exchange equipment accessories, especially high-temperature fire tube heat exchange equipment, specifically a wear-resistant sleeve that is easy to disassemble and assemble. Background Technology

[0002] A wear-resistant sleeve is a protective device for heat exchange tubes, primarily installed at the high-temperature flue gas inlet end of the heat exchange tubes in shell-and-tube heat exchangers. It prevents severe erosion and abrasion of the inner wall of the heat exchange tubes by high-temperature, dust-laden flue gas at the inlet. Because wear-resistant sleeves are suitable for high-temperature, high-dust operating conditions, they experience frequent erosion and wear, making them vulnerable parts that require periodic replacement based on wear conditions. Existing wear-resistant sleeves are straight-cylinder structures. After prolonged use under high-temperature conditions, both the sleeve and the heat exchange tubes deform, causing the sleeve to jam against the inner wall of the heat exchange tubes, severely hindering disassembly and replacement. Therefore, this invention provides a wear-resistant sleeve that is easy to install and disassemble to solve the above problems. Summary of the Invention

[0003] The purpose of this utility model is to provide an anti-wear sleeve that is easy to install and disassemble, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A wear-resistant sleeve that is easy to assemble and disassemble includes a sleeve body, which is installed at the flue gas inlet end of a heat exchange tube. Approximately three-quarters of the sleeve body extends through the heat exchange tube. The end of the sleeve body extending through the heat exchange tube is a flared horn-shaped opening with four evenly distributed grooves around its circumference. The groove depth extends to the upper straight section of the flared opening of the sleeve body. The bottom sharp corner of the flared opening at the inner end of the sleeve body is machined into a straight edge with an outer diameter the same as the inner diameter of the heat exchange tube, allowing it to fit completely against the inner wall of the heat exchange tube. The outer end extending out of the heat exchange tube is a flared horn-shaped opening. Positioning and mounting fins are installed on the outer side of the portion of the sleeve body extending out of the heat exchange tube. The positioning and mounting fins engage with the upper part of the heat exchange tube. The gap between the sleeve body and the heat exchange tube is filled with heat-resistant insulating material. The space between the outer end of the sleeve body and the tube sheet is filled with fixed refractory material.

[0005] Compared with the prior art, the present invention has the following beneficial effects: 1. Approximately three-quarters of the sleeve's length is inserted inside the heat exchange tube, effectively protecting the heat exchange tube inlet from erosion by high-temperature, dusty flue gas. The inner end of the sleeve has evenly cut grooves in the circumferential direction, extending to the upper straight section of the sleeve. The deep grooves allow for greater elasticity in the diameter direction of the inner flared end, enabling the flared end to shrink to a smaller diameter, making disassembly and assembly easier. The bottom sharp corner of the inner end of the sleeve's flared end is machined into a straight edge that fits snugly against the outer wall of the heat exchange tube, allowing the anti-wear sleeve to fit tightly against the inner wall of the heat exchange tube, improving the stability of the anti-wear sleeve during use and reducing wear on the inner wall of the heat exchange tube caused by vibrations from flue gas erosion. During the installation and disassembly of the anti-wear sleeve, removing the sharp corners eliminates sharp friction, preventing the sleeve from getting stuck against the inner wall of the heat exchange tube, making the process smoother and easier. 2. Positioning and installing fins allows the wear-resistant sleeve to be clamped onto the inner wall of the heat exchange tube, ensuring the concentricity of the sleeve and the heat exchange tube assembly. At the same time, it seals and protects the heat-resistant insulation material between the sleeve and the heat exchange tube, preventing flue gas at the port from washing away and hollowing out the heat-resistant insulation material on the outside of the wear-resistant sleeve. 3. Using a wear-resistant sleeve with a smaller diameter and increasing the gap between the sleeve and the inner diameter of the heat exchange tube, while wrapping or coating multiple layers of heat-resistant insulation material on the outside of the sleeve, can block the heat conduction and heat radiation of high-temperature flue gas to the heat exchange tube and tube sheet at the flue gas inlet end, reduce its working temperature, and optimize working conditions. 4. The double-flared design with flared ends allows the flared portion inserted into the heat exchange tube to be machined to ensure precise end dimensions that match the inner wall of the heat exchange tube. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of an anti-wear sleeve that is easy to assemble and disassemble according to this utility model; Figure 2 This is a schematic diagram of the main body of the wear-resistant sleeve that is easy to assemble and disassemble according to this utility model. Figure 3 for Figure 2 A magnified view of a portion of the image; In the diagram: 1. Tube body, 2. Positioning and mounting fins, 3. Temperature-resistant insulation material, 4. Heat exchange tube, 5. Tube sheet, 6. Refractory material Detailed Implementation

[0007] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings: Specific implementation process: Combination Figure 1This utility model is a wear-resistant sleeve that is easy to assemble and disassemble. It includes a sleeve body 1, about three-quarters of the length of which is inserted into the heat exchange tube 4. It is made of wear-resistant seamless steel pipe with a smaller diameter and the two ends are punched to ensure the coaxiality of the two ends and the middle straight section. Four evenly spaced grooves are cut around the end of the sleeve 1, which is inserted into the heat exchange tube 4. The grooves extend to the upper straight section of the flared end of the sleeve 1. The deep grooves allow for greater elasticity of the internal flared end in the diameter direction, and the flared end can be reduced to a smaller diameter, making disassembly and assembly easier. The bottom sharp corner of the flared end of the sleeve 1 is machined into a straight edge. The outer diameter of the straight edge is the same as the inner diameter of the heat exchange tube 4, so that it can be completely clamped and fitted against the inner wall of the heat exchange tube 4, improving the stability of the anti-wear sleeve 1 during use and reducing the wear caused by the vibration of flue gas scouring to the inner wall of the heat exchange tube 4. During the installation and disassembly of the anti-wear sleeve 1, the removal of the sharp corner eliminates sharp friction, so that the sleeve will not get stuck against the inner wall of the heat exchange tube, making the process smoother and easier. The outer end extending beyond the heat exchange tube is a flared trumpet shape. Positioning fins 2 are installed on the outer side of the portion of the sleeve extending beyond the heat exchange tube. These fins engage with the upper part of the heat exchange tube 4, allowing the anti-wear sleeve 1 to be securely fastened to the inner wall of the heat exchange tube 4, ensuring concentricity between the sleeve and the heat exchange tube. The gap between the sleeve 1 and the heat exchange tube 4 is filled with heat-resistant insulating material 3. The positioning fins 2 also act as a sealant and protector for the heat-resistant insulating material 3 between the sleeve 1 and the heat exchange tube 4, preventing it from being eroded or hollowed out by flue gas at the port. The space between the outer end of each sleeve and the tube sheet 5 is filled with a fixing refractory material 6.

Claims

1. A wear-resistant sleeve that is easy to install and remove, comprising: The components are: a casing body (1), positioning and mounting fins (2), heat-resistant insulation material (3), heat exchange tube (4), tube sheet (5), and refractory material (6). The casing body (1) is installed at the flue gas inlet end of the heat exchange tube (4). Approximately three-quarters of the length of the casing body (1) is inserted into the heat exchange tube (4). The port inserted into the heat exchange tube (4) is a flared bell-shaped opening with four evenly distributed grooves around its circumference. The groove depth extends to the upper straight section of the flared opening of the casing body (1). The bottom outer sharp corner of the flared opening at the inner end of the casing body (1) is machined into a... The straight edge section has an outer diameter that is the same as the inner diameter of the heat exchange tube (4), so that it can fit completely against the inner wall of the heat exchange tube (4). The outer port extending out of the heat exchange tube (4) is a flared trumpet shape. The outer side of the part of the sleeve body (1) extending out of the heat exchange tube (4) is equipped with positioning and mounting fins (2). The positioning and mounting fins (2) are engaged with the upper part of the heat exchange tube (4). The gap between the sleeve body (1) and the heat exchange tube (4) is filled with heat-resistant insulating material (3). The space between the outer end of the sleeve body (1) and the tube sheet (5) is filled with fixed refractory material (6).

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