A heat exchanger auxiliary device

Abstract

The application provides a heat exchanger auxiliary device, which comprises a frame body arranged in a heat exchange pipe, a flow disturbing mechanism, an auxiliary cleaning piece, a reinforcing piece and a fixed connecting mechanism arranged on the frame body respectively, the auxiliary cleaning piece and the reinforcing piece are uniformly distributed on the frame body, the flow disturbing mechanism is arranged on the inner side of the frame body, and the fixed connecting mechanism is arranged at both ends of the frame body and corresponds to both ends of the heat exchange pipe. The auxiliary device is detachably arranged in the heat exchange pipe, the flow disturbing mechanism disturbs and mixes the medium flow in the pipe, so that the heat transfer efficiency can be improved while the pipe diameter is appropriately increased, and in addition, the auxiliary cleaning piece can clean the dirt on the inner wall of the heat exchange pipe, and the heat exchange efficiency and the use convenience are improved as a whole.

Description

Technical Field

[0001] This invention relates to the field of heat exchangers, and more specifically, to a heat exchanger auxiliary device. Background Technology

[0002] A heat exchanger, also known as a heat exchanger or heat exchange equipment, is a device used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements. It is an industrial application of convective heat transfer and heat conduction. Currently, the most commonly used heat exchanger is the shell-and-tube heat exchanger. Many factors affect heat exchange efficiency, including thermal conductivity, temperature difference, and contact area. However, the actual heat conduction process is quite complex. For example, the heat of the medium in the shell side is first transferred to the tubes themselves in the tube side, and then from the tubes to the medium in the tube side. The medium in the tube side itself also transfers heat first to the medium in contact with the tube wall and the medium closest to the tube wall, thus reducing the temperature difference between the medium in contact with the tube wall and the tube wall. The medium near the tube axis has the slowest heat conduction, which reduces the heat exchange efficiency.

[0003] Existing solutions generally involve using smaller diameter pipes to avoid low heat transfer efficiency at the axial direction due to excessively large pipe diameters. However, since the heat exchange medium tends to accumulate scale after a certain period of use, and this approach involves small-diameter and numerous heat exchange tubes, cleaning is very difficult in practice. Another approach uses flexible coils to create impact and vibration in the pipes during shell-side medium flow, causing mixing of the medium inside the tubes and improving heat exchange efficiency. However, the joints of flexible tubes are prone to mechanical fatigue damage due to vibration. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention proposes a heat exchanger auxiliary device.

[0005] A heat exchanger auxiliary device includes a frame for being installed inside a heat exchange tube, and a flow-dispersing mechanism, an auxiliary cleaning component, a reinforcing component, and a fixing connection mechanism respectively installed on the frame. The auxiliary cleaning component and the reinforcing component are evenly distributed on the frame. The flow-dispersing mechanism is installed inside the frame. The fixing connection mechanism is installed at both ends of the frame and is installed at the two ends of the heat exchange tube.

[0006] Based on the above, the frame includes multiple support bars arranged parallel to the axial direction of the heat exchange tubes, and the multiple support bars are arranged in a ring.

[0007] Based on the above, multiple turbulence-disrupting mechanisms are provided at intervals.

[0008] Based on the above, each of the flow-disrupting mechanisms includes a first flow-disrupting unit and a second flow-disrupting unit. The first flow-disrupting unit includes a plurality of first spiral plates arranged in a positive spiral on the inner side wall of the frame. The second flow-disrupting unit includes a plurality of second spiral plates arranged in a negative spiral on the inner side wall of the frame. One end of the second spiral plate is arranged corresponding to the end of the first spiral plate.

[0009] Based on the above, the auxiliary cleaning component is an outer ring component, which is sleeved on the outside of the frame. The maximum diameter of the outer ring component is 1-1.5 mm smaller than the inner diameter of the heat exchange tube.

[0010] Based on the above, the reinforcing member is an arc-shaped connector disposed between two adjacent support bars, and multiple arc-shaped connectors on the same cross-section form a ring-shaped reinforcing member.

[0011] Based on the above, the fixed connection mechanism includes a fastener disposed at one end of the frame and a locking mechanism disposed at the other end of the frame. The fastener includes an annular snap-fit ​​component disposed at one end of the frame, and the maximum diameter of the annular snap-fit ​​component is greater than the outer diameter of the heat exchange tube.

[0012] Based on the above, the locking mechanism includes an end cylinder and a connecting end. The end cylinder is coaxially disposed at the other end of the frame, and the inner side wall of the end cylinder is provided with threads. The connecting end includes a cylindrical end and an annular end. The annular end is coaxially disposed at one end of the cylindrical end, and the other end of the cylindrical end is correspondingly disposed inside the end cylinder, and the outer wall of the cylindrical end is correspondingly provided with threads. The outer ring diameter of the annular end is larger than the outer diameter of the heat exchange tube.

[0013] Based on the above, a hand-tightening tab is provided on the outer end face of the ring-shaped end.

[0014] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, by detachably setting an auxiliary device inside the heat exchange tube, the invention can agitate and mix the medium flow in the tube through a flow disturbance mechanism, thereby increasing the tube diameter while improving heat transfer efficiency. In addition, with the cooperation of auxiliary cleaning components, the scale on the inner wall of the heat exchange tube can be cleaned, thus improving the overall heat exchange efficiency and ease of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is an internal structural schematic diagram of the other end of the frame of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Hand-tightening plate; 2. Ring-shaped end; 3. Cylindrical end; 4. Internal thread; 5. End cylinder; 6. Outer ring; 7. Arc-shaped connector; 8. Support bar; 9. First spiral plate; 10. Second spiral plate; 11. Ring-shaped snap-fit ​​connector. Detailed Implementation

[0018] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2 As shown, a heat exchanger auxiliary device includes a frame for being installed inside a heat exchange tube, and a flow-dispersing mechanism, an auxiliary cleaning component, a reinforcing component, and a fixing connection mechanism respectively installed on the frame. The auxiliary cleaning component and the reinforcing component are evenly distributed on the frame. The flow-dispersing mechanism is installed inside the frame. The fixing connection mechanism is installed at both ends of the frame and is installed at the two ends of the heat exchange tube.

[0020] In use, the frame is placed inside the tube-side heat exchange tubes of the shell-and-tube heat exchanger and fixed to the tubes using a fixing mechanism to prevent excessive noise caused by shaking inside the tubes during operation. When the fluid medium flows through the tubes, the turbulence mechanism creates a mixing effect similar to stirring, maximizing the temperature difference between the fluid medium and the tube wall, thereby improving heat exchange efficiency. Because this embodiment does not require vibration, there is no mechanical fatigue caused by vibration. Furthermore, the mixing process maximizes the temperature difference between the fluid medium and the tube wall, preventing slow heat transfer at the axial center of the tubes. Therefore, the diameter of the heat exchange tubes can be appropriately increased, and the number of heat exchange tubes can be reduced, facilitating cleaning. When cleaning is required after a certain period of use, disconnect the frame from the heat exchange tubes via the fixed connection mechanism. Then, repeatedly pull the frame out over a certain distance. The auxiliary cleaning components on the frame will rub against the inner wall of the heat exchange tubes, thus cleaning away scale buildup. Pulling the entire frame out will remove some of the cleaned scale, which can then be removed using existing cleaning tools. In practice, scale cleaning is mainly to prevent scale buildup on the inner wall of the heat exchange tubes from affecting heat exchange efficiency. The frame itself generally does not need cleaning, but it can be cleaned as needed or according to actual conditions after being pulled out.

[0021] Specifically, the frame includes multiple support bars 8 arranged parallel to the axial direction of the heat exchange tubes, and these support bars 8 are arranged in a ring. The multiple support bars 8 form a cylindrical shape, and multiple turbulence-inducing mechanisms are spaced apart and evenly distributed inside the cylindrical frame. Each turbulence-inducing mechanism includes a first turbulence-inducing unit and a second turbulence-inducing unit. The first turbulence-inducing unit includes multiple first spiral plates 9 arranged in a forward spiral on the inner wall of the frame, and the second turbulence-inducing unit includes multiple second spiral plates 10 arranged in a reverse spiral on the inner wall of the frame. One end of the second spiral plate 10 corresponds to the end of the first spiral plate 9. The first spiral plates 9 and the second spiral plates 10 have opposite spiral directions. The fluid medium passing through the first spiral plate 9 rotates to a certain extent, and after passing through the reverse spiral action of the second spiral plate 10, the fluid medium produces a mixing effect similar to stirring, thereby ensuring thorough mixing of the fluid medium and avoiding a small temperature difference between the fluid medium near the tube wall and the tube wall. In practice, in order to avoid affecting the flow rate of the fluid medium in the tube, the first spiral plate 9 and the second spiral plate 10 cannot be a complete spiral or multiple spirals, but a part of a spiral blade with a larger pitch, that is, a larger spiral angle. In this embodiment, the spiral angle is 70°-80°, and the height of the spiral plate is 1 / 2-2 / 3 of the radius of the heat exchange tube.

[0022] The auxiliary cleaning component is an outer ring 6, which is fitted onto the outside of the frame. The maximum diameter of the outer ring 6 is 1-1.5 mm smaller than the inner diameter of the heat exchange tube, facilitating the placement of the frame and other components inside the heat exchange tube. It also fits as close as possible to the inner wall of the tube for easy cleaning. The ring width of the outer ring 6 is 2-3 mm, meaning the height of the outer ring 6 protruding from the outside of the frame is 2-3 mm. Multiple outer rings 6 are evenly distributed on the outside of the frame. The spacing between adjacent outer rings 6 is set according to the convenience of actual pushing and pulling; in this embodiment, the spacing between the outer rings 6 is 20-40 cm.

[0023] The reinforcing member is an arc-shaped connector 7 disposed between two adjacent support bars 8. Multiple arc-shaped connectors 7 on the same cross-section form a ring-shaped reinforcing member, which is used to reinforce and support the support bars 8 of the frame as a whole. In addition, the outer ring 6 also plays a certain role in reinforcing and supporting the support bars 8.

[0024] Preferably, the fixed connection mechanism includes a fastener disposed at one end of the frame and a locking mechanism disposed at the other end of the frame. The fastener includes an annular snap-fit ​​member 11 disposed at one end of the frame, the maximum diameter of the annular snap-fit ​​member 11 being larger than the outer diameter of the heat exchange tube. The locking mechanism includes an end cylinder 5 and a connecting end. The end cylinder 5 is coaxially disposed at the other end of the frame, and the inner sidewall of the end cylinder 5 is provided with a thread, i.e., an internal thread 4. The connecting end includes a cylindrical end 3 and an annular end 2. The annular end 2 is coaxially disposed at one end of the cylindrical end 3, and the other end of the cylindrical end 3 is correspondingly disposed inside the end cylinder 5, and the outer wall of the cylindrical end 3 is correspondingly provided with a thread. The outer ring diameter of the annular end 2 is larger than the outer diameter of the heat exchange tube. In use, after removing the connecting end, insert the other end of the frame into the heat exchange tube and push it inward until the annular snap-fit ​​11 at one end of the frame presses against one port of the heat exchange tube. At this time, at the other end of the heat exchange tube, insert the cylindrical end 3 of the connecting end into the end tube 5 and rotate it. The connecting end is connected to the frame through the thread, and then rotated until the annular end 2 presses against the other port of the heat exchange tube. At this time, due to the action of the thread, the frame is tightened and fixed to both ends of the heat exchange tube, preventing the frame from shaking or falling out of the heat exchange tube when the fluid medium flows inside the heat exchange tube. In practice, a hand-tightening tab 1 is provided on the outer end face of the annular end 2 to facilitate the rotation and force application of the connecting end during disassembly and assembly.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A heat exchanger auxiliary device, characterized in that: It includes a frame for being installed inside the heat exchange tube and a flow-dispersing mechanism, an auxiliary cleaning component, a reinforcing component, and a fixing connection mechanism respectively installed on the frame. The auxiliary cleaning component and the reinforcing component are evenly distributed on the frame. The flow-dispersing mechanism is installed inside the frame. The fixing connection mechanism is installed at both ends of the frame and is installed at the two ends of the heat exchange tube. The fixed connection mechanism includes a fastener disposed at one end of the frame and a locking mechanism disposed at the other end of the frame. The fastener includes an annular snap-fit ​​component disposed at one end of the frame, the maximum diameter of which is greater than the outer diameter of the heat exchange tube. The locking mechanism includes an end cylinder and a connecting end, the end cylinder being coaxially disposed at the other end of the frame, and the inner sidewall of the end cylinder being provided with threads. The connection end includes a cylindrical end and an annular end. The annular end is coaxially disposed at one end of the cylindrical end, and the other end of the cylindrical end is correspondingly disposed inside the end cylinder. A thread is correspondingly disposed on the outer wall of the cylindrical end. The outer ring diameter of the annular end is larger than the outer diameter of the heat exchange tube.

2. The heat exchanger auxiliary device according to claim 1, characterized in that: The frame includes multiple support bars arranged parallel to the axial direction of the heat exchange tubes, and the multiple support bars are arranged in a ring.

3. The heat exchanger auxiliary device according to claim 1, characterized in that: The turbulence-disrupting mechanism is provided at intervals.

4. The heat exchanger auxiliary device according to claim 3, characterized in that: Each of the aforementioned turbulence mechanisms includes a first turbulence unit and a second turbulence unit. The first turbulence unit includes a plurality of first spiral plates arranged in a positive spiral on the inner side wall of the frame. The second turbulence unit includes a plurality of second spiral plates arranged in a negative spiral on the inner side wall of the frame. One end of the second spiral plate is disposed corresponding to the end of the first spiral plate.

5. The heat exchanger auxiliary device according to claim 1, characterized in that: The auxiliary cleaning component is an outer ring component, which is sleeved on the outside of the frame. The maximum diameter of the outer ring component is 1-1.5 mm smaller than the inner diameter of the heat exchange tube.

6. The heat exchanger auxiliary device according to claim 2, characterized in that: The reinforcing member is an arc-shaped connector disposed between two adjacent support bars, and multiple arc-shaped connectors on the same cross-section form a ring-shaped reinforcing member.

7. The heat exchanger auxiliary device according to claim 1, characterized in that: A hand-tightening tab is provided on the outer end face of the ring-shaped end.

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