A waste heat recovery device for a tempering furnace

Abstract

This invention discloses a waste heat recovery device for a tempering furnace, including a connecting main board with a main outlet. A heat-insulating gas-conducting box is located on one side of the bottom of the connecting main board, and a waste heat recovery assembly is mounted on the connecting main board. This invention can conduct high-temperature flue gas generated during the operation of the tempering furnace to the main outlet. Relying on the reciprocating motion of the first and second contacting slide plates, the flue gas is first sealed and held within the main outlet for a period of time. Initial heat recovery is achieved through the annular heat exchange tube assembly. Then, when sliding and connecting with the first contacting slide plate, the flue gas is diverted to various cylindrical exhaust chambers. The passage time is extended by elastic spiral heat exchange plates, improving heat exchange efficiency. Simultaneously, during the sliding of the first contacting slide plate, the elastic spiral heat exchange plates can compress against the top pressure ball, facilitating the entry of the flue gas into the designated groove, further achieving heat recovery.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology for tempering furnaces, and specifically to a waste heat recovery device for tempering furnaces. Background Technology

[0002] Tempering furnaces in heat treatment processes are used for tempering general metal workpieces after quenching, as well as for quenching, annealing, and aging heat treatment of alloy workpieces such as aluminum alloy die castings, pistons, and aluminum plates. Tempering furnaces generally use gas combustion for heating and require flue gas emissions.

[0003] The Chinese patent authorization announcement number is CN214270978U, entitled "A Waste Heat Recovery Device for a Tempering Furnace". It includes a flue gas box, a heat exchange cylinder connected to the top of the flue gas box, and a sealing cover on the top of the heat exchange cylinder. A flue gas pipe is connected to the top of the sealing cover. The heat exchange cylinder is equipped with a first heat exchange box, a second heat exchange box, and a third heat exchange box, and multiple sets of heat exchange tubes are connected between the first heat exchange box, the second heat exchange box, and the third heat exchange box. The cited document describes how flue gas is discharged into each heat exchange box via a flue gas duct, allowing the high-temperature flue gas to be separated into stages and come into contact with the heat exchange tubes and boxes for heat exchange, thus preventing heat waste. However, the shortcomings of this existing technology are as follows: although the existing technology can recover heat from the flue gas discharged from the furnace, the effect is generally poor. After being discharged, the flue gas continues to flow along each stage of the heat exchange components. Although a smoke-permeable plate is set at the top of the heat exchange cylinder to block it, as long as new flue gas enters, the original flue gas will be squeezed out. Thus, as long as the flue gas continues to flow from bottom to top, the flue gas will continue to be discharged, making it impossible to ensure that the flue gas effectively stays inside the heat exchange cylinder for sufficient heat exchange, i.e., the waste heat recovery efficiency is low. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a waste heat recovery device for tempering furnaces.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A waste heat recovery device for a tempering furnace includes a connecting main board with a main outlet. A heat-insulating gas guide box is located on one side of the bottom of the connecting main board. A waste heat recovery assembly is also mounted on the connecting main board, comprising a first and a second bonding slide plate. The first and second bonding slide plates are slidably disposed on opposite sides of the connecting main board. A synchronous sliding mechanism is provided between the first and second bonding slide plates. A through groove is provided on the first bonding slide plate, and a secondary outlet is provided on the second bonding slide plate. A flue gas outlet is provided on the connecting main board to connect with the secondary outlet. The conductive assembly includes an annular heat exchange tube group that mates with the insulated air-conducting box within the main outlet; the first fitting slide plate also has multiple cylindrical exhaust chambers communicating with the through slot, each cylindrical exhaust chamber having a heat exchange rotating tube rotatably mounted and mates with the insulated air-conducting box, an elastic spiral heat exchange plate slidably mounted on the heat exchange rotating tube, the bottom end of the elastic spiral heat exchange plate being fixedly connected to the outer wall of the corresponding heat exchange rotating tube, and a groove being provided on the bottom surface of the elastic spiral heat exchange plate; a top pressure ball is connected to the top of the cylindrical exhaust chamber, and a one-way rolling assembly is provided between the top end of the heat exchange rotating tube and the connecting main plate.

[0007] As a further aspect of the present invention: the elastic spiral heat exchange plate is a hollow body, and both ends are connected to the corresponding heat exchange tubes. A corrugated expansion tube is connected between the top end of the elastic spiral heat exchange plate and the heat exchange tube, and the top end of the elastic spiral heat exchange plate is connected to the corresponding heat exchange tube through the corrugated expansion tube.

[0008] As a further aspect of the present invention: the unidirectional rolling assembly includes a first roller, which is coaxially connected to the top end of the heat exchange tube. The top of the connecting main board is provided with a plurality of first one-way bearings. Each heat exchange tube is rotatably connected to a first contact plate through a corresponding first one-way bearing. A plurality of second rollers cooperating with the first rollers are distributed laterally at equal intervals on one side of the connecting main board. A plurality of second one-way bearings are provided on the connecting main board. Each second roller is rotatably connected to the connecting main board through a corresponding second one-way bearing.

[0009] As a further aspect of the present invention: the flue gas conduction assembly includes a docking cylinder, the docking cylinder is connected to the connecting main board, a soft guide sleeve is connected between the docking cylinder and the secondary port, an electric fan is provided inside the docking cylinder, and a transmission mechanism is provided between the electric fan and the second bonding slide plate.

[0010] As a further aspect of the present invention: the synchronous sliding mechanism includes a first slide and a second slide, the first slide is vertically connected to the top of the first contact slide plate, the second slide is vertically connected to the top of the second contact slide plate, the first slide and the second slide are connected to each other, a strip-shaped groove is horizontally opened on the connecting main board, the first slide is slidably connected to the strip-shaped groove, and a spring is connected between the first slide and the strip-shaped groove.

[0011] As a further aspect of the present invention: the transmission mechanism includes a first steering helical gear, which is coaxially connected to the rotating end of the electric fan. A linkage shaft is rotatably connected to the top of the docking cylinder, and the linkage shaft passes through the docking cylinder. A second steering helical gear that meshes with the first steering helical gear is coaxially connected to the bottom end of the linkage shaft. A horizontal push rod that cooperates with the second slide is connected to the top of the linkage shaft, and an elastic rubber rod is provided at the end of the horizontal push rod.

[0012] As a further aspect of the present invention: the connecting motherboard is provided with a forward heat exchange pipe and a reverse heat exchange pipe, both of which are connected to an annular heat exchange pipe assembly; the heat-insulating air-conducting box is provided with a first circulating pump; the forward heat exchange pipe and the reverse heat exchange pipe are respectively connected to the corresponding ports of the first circulating pump; and the annular heat exchange pipe assembly has a plurality of first heat exchange fins evenly distributed around its inner circumference.

[0013] As a further aspect of the present invention: the first fitting plate is connected to a plurality of circulation pipes that are connected to corresponding heat exchange tubes; each circulation pipe is connected to a connecting sleeve at one end near the corresponding heat exchange tube, the heat exchange tube passes through the corresponding connecting sleeve, and the heat exchange tube has a plurality of through holes that cooperate with the corresponding connecting sleeve; a second circulation pump is connected to the end of the circulation pipe near the heat insulation air box, and a transition heat exchange tube is connected between the second circulation pump and the heat exchange tube, and the bottom end of the heat exchange tube is rotatably connected to the transition heat exchange tube.

[0014] As a further embodiment of the present invention: a strip-shaped opening is provided on one side of the top of the heat-insulating air-conducting box, and a closed sliding cover is fitted onto the strip-shaped opening and rotatably connected to the heat exchange tube, and the closed sliding cover is fixedly connected to the circulation tube.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention can conduct the high-temperature flue gas generated during the operation of the tempering furnace to the main inlet. Relying on the reciprocating motion of the first and second contacting slide plates, the flue gas can be first sealed and kept in the main inlet for a period of time. The flue gas heat is initially recovered by the set annular heat exchange tube group. Then, when it slides and connects with the first contacting slide plate, the flue gas is diverted to each cylindrical exhaust chamber. The passage time is extended by the elastic spiral heat exchange plate, which improves the heat exchange efficiency. At the same time, during the sliding of the first contacting slide plate, the elastic spiral heat exchange plate can be squeezed with the set top pressure ball to generate compression, so that the flue gas can enter the set groove and further realize heat recovery.

[0017] 2. The tempering furnace of the present invention is driven by an electric fan to flow in the direction of the main outlet. During this process, the electric fan can be linked with the first and second contacting slide plates by the combination of the first steering helical gear, the second steering helical gear and the horizontal push rod. The first and second contacting slide plates can slide back by the spring force, thus realizing reciprocating motion without the need to add a separate drive component.

[0018] 3. When the first contacting slide plate of the present invention slides in the direction of spring tension, the heat exchange tube and the elastic spiral heat exchange plate can be rotated by the combination of the first one-way bearing and the first roller. When the first contacting slide plate slides back to reset, the heat exchange tube cannot reverse due to the restriction of the first one-way bearing. In this way, it can be ensured that the elastic spiral heat exchange plate rotates only in one direction, so as to make continuous interaction with the top pressure ball. At the same time, during this process, the first roller slides along the second roller that can rotate, so as to avoid hindering the reset of the first contacting slide plate. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0022] Figure 3 This is a partial structural diagram of the connection between the circulation pipe and the heat exchange tube in this invention;

[0023] Figure 4 yes Figure 2 Enlarged structural diagram at point B;

[0024] Figure 5 This is a left-side view of the structure in which the first bonding slide, the heat-insulating air-conducting box, and the connecting motherboard are connected in this invention.

[0025] Figure 6This is a top view schematic diagram of the through slot, secondary through port and main through port structure in this invention;

[0026] Figure 7 This is a top view schematic diagram of the structure in which the heat-insulating air-conducting box and the connecting motherboard are connected in this invention;

[0027] Figure 8 This is a right-side view of the annular heat exchanger tube assembly in this invention.

[0028] Figure 9 yes Figure 1 Enlarged structural diagram at point C;

[0029] Figure 10 yes Figure 1 A magnified structural diagram at point D.

[0030] In the diagram: 1. Connecting motherboard; 2. Main port; 3. Second fitting slide plate; 4. Soft guide sleeve; 5. Horizontal push rod; 6. Second slide; 7. Elastic rubber rod; 8. First slide; 9. Exhaust pipe; 10. First fitting slide plate; 11. Insulated air guide box; 12. Air inlet pipe; 13. Air guide pipe; 14. Forward heat exchange pipe; 15. Reverse heat exchange pipe; 16. Annular heat exchange tube assembly; 17. Strip groove; 18. Spring; 19. First roller; 20. First one-way bearing; 21. Circulation pipe; 22. Connecting sleeve; 2 3. Second roller; 24. Second one-way bearing; 25. Through groove; 26. Heat exchange tube; 27. Columnar exhaust chamber; 28. Elastic spiral heat exchange fin; 29. ​​Groove; 30. Top pressure ball; 31. Closed sliding cover; 32. Strip-shaped opening; 33. First heat exchange fin; 34. Connecting cylinder; 35. Electric fan; 36. First steering helical gear; 37. Second steering helical gear; 38. Linkage shaft; 39. Transition heat exchange tube; 40. Second circulating pump; 41. First circulating pump; 42. Secondary opening; 43. Second heat exchange fin. Detailed Implementation

[0031] 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.

[0032] like Figures 1-10As shown, a waste heat recovery device for a tempering furnace includes a connecting main board 1. The connecting main board 1 has a main outlet 2 for flue gas passage. A heat-insulating gas guide box 11 is located on one side of the bottom of the connecting main board 1. An air inlet pipe 12 is located on one side of the bottom of the heat-insulating gas guide box 11, and a gas guide pipe 13 is located on the top of the heat-insulating gas guide box 11. The gas guide pipe 13 can be connected to the combustion chamber inlet of the tempering furnace. A waste heat recovery assembly is provided on the connecting main board 1 to cooperate with the main outlet 2. The waste heat recovery assembly includes a first bonding plate 10 and a second bonding plate 3. The first bonding plate 10 and the second bonding plate 3 are slidably disposed on both sides of the connecting main board 1, with the first bonding plate 10 positioned close to the heat-insulating gas guide box 11. A synchronous sliding mechanism is provided between the bonding slide plates 3. The synchronous sliding mechanism includes a first slide 8 and a second slide 6. The first slide 8 is vertically fixed to the top of the first bonding slide plate 10, and the second slide 6 is vertically fixed to the top of the second bonding slide plate 3. The first slide 8 and the second slide 6 are connected to each other by a rod. A horizontal strip groove 17 is provided on the connecting main plate 1. The first slide 8 is slidably connected to the strip groove 17. A spring 18 is connected between the first slide 8 and the strip groove 17. When the first slide 8 slides along the strip groove 17, the second slide 6 slides accordingly, so that both the first bonding slide plate 10 and the second bonding slide plate 3 slide along the corresponding end face of the connecting main plate 1. A through groove 25 is provided on the first bonding slide plate 10, and a through groove 25 is provided on the second bonding slide plate 3. A secondary outlet 42 is provided. Both the through groove 25 and the secondary outlet 42 cooperate with the main outlet 2. When the first contact plate 10 and the second contact plate 3 are in their original positions, the through groove 25 is aligned with the main outlet 2, and the secondary outlet 42 is offset to one side relative to the main outlet 2. When the first contact plate 10 and the second contact plate 3 slide in the direction of the spring 18 under the action of external force, the through groove 25 is offset from the main outlet 2, and the secondary outlet 42 is connected to the main outlet 2. A flue gas conduction assembly that cooperates with the secondary outlet 42 is provided on the main board 1. The flue gas conduction assembly includes a docking cylinder 34, which is fixedly connected to the main board 1 and is close to the side where the second contact plate 3 is located. A flexible guide sleeve 4 is connected between the docking cylinder 34 and the secondary outlet 42. The flexible guide sleeve 4 is bendable. Simultaneously, it can also conduct flue gas into the secondary inlet 42. An electric fan 35 is fixedly installed inside the docking cylinder 34. The docking cylinder 34 can connect to the exhaust end of the tempering furnace. The electric fan 35 is used to drive the flow of the incoming flue gas. A transmission mechanism is provided between the electric fan 35 and the second contacting slide plate 3. The transmission mechanism includes a first steering helical gear 36, which is coaxially connected to the rotating end of the electric fan 35. A linkage shaft 38 is rotatably connected to the top of the docking cylinder 34. The linkage shaft 38 passes through the docking cylinder 34. A second steering helical gear 37 that meshes with the first steering helical gear 36 is coaxially connected to the bottom end of the linkage shaft 38. A horizontal push rod 5 that cooperates with the second slide 6 is horizontally fixedly connected to the top of the linkage shaft 38. An elastic rubber rod 7 is provided at the end of the horizontal push rod 5.The second slide 6 is on the rotation trajectory of the horizontal push rod 5. When the electric fan 35 drives the flue gas entering the docking cylinder 34 towards the secondary outlet 42, since the secondary outlet 42 is not initially connected to the main outlet 2, the main outlet 2 is only blocked by the part of the second contact plate 3 other than the secondary outlet 42. Therefore, the flue gas can only accumulate in the soft guide sleeve 4. During this process, the first steering helical gear 36 rotates synchronously and drives the meshing second steering helical gear 37 to rotate. The second steering helical gear 37 then drives the linkage shaft 38 to rotate. The horizontal push rod 5 at the top then begins to rotate, pushing the second slide 6 during the rotation. The second slide 6 then drives the first slide 8 to slide synchronously along the strip groove 17. In this way, the first contact plate 10 and the second contact plate 3 slide sideways in conjunction. During the sliding process, the through groove 25 disengages from the main outlet 2, while the secondary outlet 42 slides and connects to one side of the main outlet 2, facilitating the flow of smoke into the inside of the main outlet 2. At this time, the other side of the main outlet 2 is blocked by the portion of the first contact plate 10 outside the through groove 25, meaning that the smoke cannot flow away.

[0033] An annular heat exchange tube assembly 16, which is connected to the insulated air-conducting box 11, is installed inside the main port 2. The annular heat exchange tube assembly 16 consists of multiple horizontally distributed annular tubes, which are connected sequentially. A forward heat exchange tube 14 and a reverse heat exchange tube 15 are embedded in the main board 1. The end of the forward heat exchange tube 14 near the main port 2 is connected to one side of the annular tube of the annular heat exchange tube assembly 16, and the end of the reverse heat exchange tube 15 near the main port 2 is connected to the other side of the annular tube of the annular heat exchange tube assembly 16. A first circulation pump 41 is fixedly installed inside the insulated air-conducting box 11. The other ends of the forward heat exchange tube 14 and the reverse heat exchange tube 15 both pass through the insulated air-conducting box 11 and are connected to the corresponding ports of the first circulation pump 41. The forward heat exchange tube 14 and the reverse heat exchange tube 15 are connected to the corresponding ports of the first circulation pump 41. The pipe connecting tube 15 and the annular heat exchange tube assembly 16 is filled with a heat exchange liquid, such as water. The annular heat exchange tube assembly 16 has multiple first heat exchange fins 33 evenly distributed around its inner circumference. The annular heat exchange tube assembly 16 increases the heat exchange surface by means of the first heat exchange fins 33, so as to exchange the heat in the flue gas entering the main outlet 2 with the heat exchange liquid flowing inside. Then the heat exchange liquid carries the heat and flows into the heat-insulating air guide box 11 under the action of the first circulation pump 41. This facilitates the heating of the lower temperature air entering the heat-insulating air guide box 11 through the air inlet pipe 12. The heated higher temperature air is discharged through the air guide pipe 13 and discharged to the air inlet of the combustion chamber of the tempering furnace, so that the combustion chamber of the tempering furnace can carry out efficient combustion with the heated air; at the same time, waste heat recovery is also achieved.

[0034] The first bonding slide plate 10 is also provided with multiple cylindrical exhaust chambers 27 communicating with the through slots 25. All cylindrical exhaust chambers 27 are located above the through slots 25. Multiple exhaust pipes 9 are fixedly connected to the first bonding slide plate 10, communicating with the top of the corresponding cylindrical exhaust chambers 27. Each cylindrical exhaust chamber 27 has a vertically rotatable heat exchanger tube 26 that mates with the heat-insulating air-conducting box 11. The two ends of the heat exchanger tube 26 pass through both ends of the first bonding slide plate 10 and are rotatably connected to it. Multiple circulation pipes 21 are connected to the first bonding slide plate 10, mate with the corresponding heat exchanger tubes 26. Each circulation pipe... A connecting sleeve 22 is fixedly connected to one end of the circulating pipe 21 near the corresponding heat exchange tube 26. The heat exchange tube 26 passes through the corresponding connecting sleeve 22. Multiple through holes are provided on the heat exchange tube 26 to mate with the corresponding connecting sleeve 22, thus enabling communication between the heat exchange tube 26 and the circulating pipe 21. The heat exchange tube 26 can also rotate relative to the connecting sleeve 22. Sealing rings that mate with the heat exchange tube 26 are provided on both sides of the connecting sleeve 22. Specifically, a second circulating pump 40 is connected to the end of the circulating pipe 21 near the insulation and air guiding box 11. A transition heat exchange pipe 39 connects the second circulating pump 40 and the heat exchange tube 26. The bottom end of the heat exchange tube 26 is rotatably connected to the transition heat exchange tube 39 and they are interconnected. The second circulation pump 40 is also connected to the transition heat exchange tube 39. The pipeline formed by the second circulation pump 40, the transition heat exchange tube 39, the circulation pipe 21, and the heat exchange tube 26 is filled with heat exchange liquid to facilitate heat absorption. A strip-shaped opening 32 is provided on one side of the top of the heat-insulating air guide box 11. A closed sliding cover 31 that is rotatably connected to the heat exchange tube 26 is fitted onto the strip-shaped opening 32. The closed sliding cover 31 is fixedly connected to the circulation pipe 21. An elastic spiral heat exchange plate 28 that cooperates with the corresponding cylindrical exhaust chamber 27 is slidably sleeved on the heat exchange tube 26. The bottom end of the elastic spiral heat exchanger 28 is fixedly connected to the outer wall of the corresponding heat exchange tube 26, and the top end is a sliding end, that is, the top end of the elastic spiral heat exchanger 28 can be compressed as a whole after being subjected to force. The elastic spiral heat exchanger 28 is a hollow body, and both ends are connected to the corresponding heat exchange tube 26. A corrugated expansion tube is connected between the top end of the elastic spiral heat exchanger 28 and the heat exchange tube 26. The top end of the elastic spiral heat exchanger 28 is connected to the corresponding heat exchange tube 26 through the corrugated expansion tube. At the same time, the corrugated expansion tube can expand and contract to avoid hindering the compression movement of the elastic spiral heat exchanger 28. Multiple grooves 29 are equally spaced on the bottom surface of the elastic spiral heat exchanger 28.The top of the cylindrical exhaust chamber 27 is fixedly connected by a rod to a pressure ball 30 that contacts the arc surface of the top of the elastic spiral heat exchanger 28. A one-way rolling assembly is provided between the top of the heat exchange tube 26 and the connecting main board 1. The one-way rolling assembly includes a first roller 19, which is coaxially fixedly connected to the top of the heat exchange tube 26. Multiple first one-way bearings 20 are installed on the top of the connecting main board 1. Each heat exchange tube 26 is rotatably connected to the first contact plate 10 through a corresponding first one-way bearing 20. When the first contact plate 10 slides in the direction of the spring 18, the first roller 19 can roll against the end face of the connecting main board 1. When the first contact plate 10 slides back, the first roller 19 cannot rotate due to the presence of the first one-way bearing 20, and the connecting main board 1 moves closer to the first contact plate 10. On one side of the first contacting slide plate 10, there are multiple second rollers 23 that cooperate with the first roller 19. Multiple second one-way bearings 24 are fixedly installed on the connecting main board 1. Each second roller 23 is rotatably connected to the connecting main board 1 through the corresponding second one-way bearing 24. When the first contacting slide plate 10 slides in the direction of the tension of the spring 18, the first roller 19 rolls along the contacting second rollers 23. During this process, each second roller 23 is subjected to a reaction force, but it cannot rotate due to the presence of the second one-way bearings 24. When the first contacting slide plate 10 slides back, the first roller 19 is restricted from rotating by the first one-way bearing 20, and the contacting second rollers 23 can rotate. This facilitates the sliding of the first roller 19 and reduces the obstruction during the sliding back of the first contacting slide plate 10.Thus, whenever the through groove 25 on the first fitting slide plate 10 aligns with the main outlet 2, the flue gas that has already undergone heat exchange through the annular heat exchange tube assembly 16 in the main outlet 2 is diverted through the through groove 25 to each cylindrical exhaust chamber 27. Due to the presence of the elastic spiral heat exchange fins 28, a spiral cavity is formed inside the cylindrical exhaust chamber 27, which prolongs the flow of flue gas within the cylindrical exhaust chamber 27. This facilitates the further transfer of residual heat in the flue gas to the internally flowing heat exchange liquid through the heat exchange tube 26. Furthermore, when the first fitting slide plate 10 slides in the direction of the spring 18's extension, the first roller 19 at the top of the heat exchange tube 26 rolls along the distribution of the second rollers 23, thereby driving the heat exchange tube 26 to rotate. During the rotation of the heat exchange tube 26, the elastic spiral heat exchange fins 28 fitted on it rotate synchronously. Due to the top pressure... The ball 30 is fixed at the top of the cylindrical exhaust chamber 27 and contacts the top arc surface of the elastic spiral heat exchange plate 28. Since the bottom of the elastic spiral heat exchange plate 28 is fixed and the top is a sliding end, the top ball 30 will squeeze the rotating elastic spiral heat exchange plate 28 during the rotation of the elastic spiral heat exchange plate 28. The elastic spiral heat exchange plate 28 will be compressed as a whole, which will facilitate the squeezing of the flue gas and facilitate the contact between the flue gas and the inside of the groove 29, thereby improving the heat exchange efficiency. This will allow the heat in the flue gas to be further transferred to the heat exchange liquid flowing inside the elastic spiral heat exchange plate 28. The low-temperature flue gas after heat exchange will be discharged from the corresponding exhaust pipe 9, and the heat exchange liquid after absorbing heat will enter the transition heat exchange pipe 39 inside the heat exchange tube 26 along the bottom end of the heat exchange tube 26 to heat the air inside the heat-insulating air-conducting box 11.

[0035] Multiple second heat exchange fins 43 are distributed on the outer wall of the transition heat exchange tube 39, and multiple second heat exchange fins 43 are also distributed at the ends of the forward heat exchange tube 14 and the reverse heat exchange tube 15 inside the heat-insulating air-conducting box 11. Here, the second heat exchange fins 43 are used to increase the heat dissipation area so that the heat inside each tube can be dissipated and the air in the space can be heated.

[0036] All of the above-mentioned heat exchanger components are made of thermally conductive metals, which can efficiently transfer heat.

[0037] The working principle of this invention: The docking cylinder 34 connects with the flue pipe of the tempering furnace, facilitating the introduction of high-temperature flue gas into the docking cylinder 34. The electric fan 35 inside the docking cylinder 34 drives the incoming flue gas to flow towards the soft guide sleeve 4. During the rotation of the electric fan 35, the first steering helical gear 36 rotates synchronously, driving the meshing second steering helical gear 37 to rotate. The second steering helical gear 37 then drives the linkage shaft 38 to rotate, thus the top horizontal push rod 5 begins to rotate. During the rotation, it pushes the second slide 6, and the second slide 6 drives the first slide 8 to slide synchronously along the strip groove 17, thus achieving the first engagement. The sliding plate 10 and the second mating sliding plate 3 slide sideways in conjunction. During the sliding process, the through groove 25 on the first mating sliding plate 10 disengages from the main outlet 2, while the secondary outlet 42 on the second mating sliding plate 3 slides and engages with one side of the main outlet 2, facilitating the entry of the flue gas conducted inside the soft guide sleeve 4 into the inner side of the main outlet 2. At this time, the other side of the main outlet 2 is blocked by the part other than the through groove 25 on the first mating sliding plate 10, that is, the flue gas cannot flow out and is temporarily retained. During this process, the annular heat exchange tube assembly 16 installed inside the main outlet 2 increases the heat exchange surface by relying on the first heat exchange fin 33, so as to facilitate the exchange of heat in the flue gas entering the main outlet 2. The heat exchange liquid flows into the internal heat exchange fluid, and then the heat exchange fluid, carrying heat, flows through the reverse heat exchange pipe 15 under the action of the first circulation pump 41 to the heat-insulating air-conducting box 11. This facilitates the heating of the lower-temperature air entering the heat-insulating air-conducting box 11 through the air inlet pipe 12, and allows the heat exchange liquid to return to the annular heat exchange tube group 16 through the forward heat exchange pipe 14 after heat release, continuously circulating. Since the end of the horizontal push rod 5 is provided with an elastic rubber rod 7, which can be bent, after the first contact plate 10 and the second contact plate 3 slide to the limit position in the direction of the spring 18 tension, the elastic rubber rod... 7. By bending, the horizontal push rod 5 can be easily disengaged from the second slide 6. Under the action of the spring 18, the first contact slide 10 and the second contact slide 3 slide back. After sliding back, the through groove 25 on the first contact slide 10 connects with the main outlet 2. At this time, the secondary outlet 42 on the second contact slide 3 disengages from the main outlet 2. The other parts of the second contact slide 3 then block one side of the main outlet 2. Thus, the flue gas in the main outlet 2, which has been heat-treated by the annular heat exchange tube group 16, is diverted through the through groove 25 to the various cylindrical exhaust chambers 27 opened on the first contact slide 10.

[0038] The presence of the elastic spiral heat exchanger 28 creates a spiral cavity within the cylindrical exhaust chamber 27, extending the flow of flue gas within the chamber. This facilitates the transfer of residual heat in the flue gas to the internally flowing heat exchange fluid via the heat exchange tube 26. Furthermore, when the first contact plate 10 slides again in the direction of the spring 18's extension, the first roller 19 at the top of the heat exchange tube 26 rolls along the distribution of the second rollers 23, thereby causing the heat exchange tube 26 to rotate. During the rotation of the heat exchange tube 26, the elastic spiral heat exchanger 28 rotates synchronously. Since the top pressure ball 30 is fixed to the top of the cylindrical exhaust chamber 27... The top ball 30 contacts the top arc surface of the elastic spiral heat exchange plate 28. Since the bottom end of the elastic spiral heat exchange plate 28 is fixed and the top end is a sliding end, the top ball 30 squeezes the rotating elastic spiral heat exchange plate 28 during the rotation of the elastic spiral heat exchange plate 28. The elastic spiral heat exchange plate 28 is compressed as a whole, which facilitates the squeezing of the flue gas and facilitates the contact between the flue gas and the inside of the groove 29, thereby improving the heat exchange efficiency. This allows the heat in the flue gas to be further transferred to the heat exchange liquid flowing inside the elastic spiral heat exchange plate 28. When the top ball 30 is removed from the end of the elastic spiral heat exchange plate 28, the elastic spiral heat exchange plate 28 rebounds and resets.

[0039] When the first contacting slide plate 10 slides in the stretching direction of the spring 18, the first roller 19 rolls along the contacting second roller 23. During this process, each second roller 23 is subjected to a reaction force, but due to the presence of the second one-way bearing 24, it cannot rotate. This allows the first roller 19 to rotate by relying on the first one-way bearing 20, thereby driving the heat exchange tube 26 to rotate. When the first contacting slide plate 10 slides back and the first roller 19 is restricted from rotating by the first one-way bearing 20, the contacting second roller 23 can rotate. This facilitates the sliding of the first roller 19, thereby reducing the resistance during the sliding back of the first contacting slide plate 10. This also ensures that the heat exchange tube 26 rotates only in one direction, so that the top pressure ball 30 can continuously circulate the elastic spiral heat exchange plate 28.

[0040] The low-temperature flue gas after heat exchange in the first bonding slide plate 10 is discharged from the corresponding exhaust pipe 9, while the heat exchange liquid after absorbing heat enters the transition heat exchange pipe 39 inside the heat exchange tube 26 at the bottom end, so as to heat the air inside the heat-insulating air-conducting box 11.

[0041] The heated air inside the insulated air box 11 is discharged through the air pipe 13 and directed to the air inlet of the combustion chamber of the tempering furnace, so that the combustion chamber of the tempering furnace can rely on the heated air for efficient combustion and realize waste heat recovery.

[0042] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A waste heat recovery device for a tempering furnace, comprising a connecting main board (1), a main port (2) provided on the connecting main board (1), a heat-insulating air-conducting box (11) provided on one side of the bottom of the connecting main board (1), and a waste heat recovery component provided on the connecting main board (1), characterized in that, The waste heat recovery assembly includes a first bonding slide plate (10) and a second bonding slide plate (3). The first bonding slide plate (10) and the second bonding slide plate (3) are slidably disposed on both sides of the connecting main plate (1). A synchronous sliding mechanism is provided between the first bonding slide plate (10) and the second bonding slide plate (3). A through groove (25) is provided on the first bonding slide plate (10), and a secondary through port (42) is provided on the second bonding slide plate (3). A flue gas conduction assembly that cooperates with the secondary through port (42) is provided on the connecting main plate (1). An annular heat exchange tube assembly (16) that cooperates with the heat-insulating gas guide box (11) is provided in the main through port (2). The fitting slide plate (10) is also provided with multiple cylindrical exhaust chambers (27) that communicate with the through groove (25). Each cylindrical exhaust chamber (27) is rotatably provided with a heat exchange tube (26) that is connected to the heat insulation air guide box (11). An elastic spiral heat exchange plate (28) is slidably provided on the heat exchange tube (26). The bottom end of the elastic spiral heat exchange plate (28) is fixedly connected to the outer wall of the corresponding heat exchange tube (26). The bottom surface of the elastic spiral heat exchange plate (28) is provided with a groove (29). The top of the cylindrical exhaust chamber (27) is connected with a top pressure ball (30). The top of the heat exchange tube (26) is connected to the connecting main plate (1) with a one-way rolling assembly. The elastic spiral heat exchange plate (28) is a hollow body, and both ends are connected to the corresponding heat exchange tube (26). A corrugated expansion tube is connected between the top end of the elastic spiral heat exchange plate (28) and the heat exchange tube (26). The top end of the elastic spiral heat exchange plate (28) is connected to the corresponding heat exchange tube (26) through the corrugated expansion tube. The one-way rolling assembly includes a first roller (19), which is coaxially connected to the top end of the heat exchange tube (26). The top of the connecting main board (1) is provided with a plurality of first one-way bearings (20). Each heat exchange tube (26) is rotatably connected to the first contact plate (10) through the corresponding first one-way bearing (20). A plurality of second rollers (23) cooperating with the first roller (19) are distributed laterally at equal intervals on one side of the connecting main board (1). A plurality of second one-way bearings (24) are provided on the connecting main board (1). Each second roller (23) is rotatably connected to the connecting main board (1) through the corresponding second one-way bearing (24). The flue gas conduction assembly includes a docking cylinder (34), which is connected to the connecting main board (1). A soft guide sleeve (4) is connected between the docking cylinder (34) and the secondary port (42). An electric fan (35) is installed inside the docking cylinder (34). A transmission mechanism is provided between the electric fan (35) and the second bonding slide plate (3). The synchronous sliding mechanism includes a first slide (8) and a second slide (6). The first slide (8) is vertically connected to the top of the first contact slide (10), and the second slide (6) is vertically connected to the top of the second contact slide (3). The first slide (8) and the second slide (6) are connected to each other. A strip groove (17) is horizontally opened on the connecting main board (1). The first slide (8) is slidably connected to the strip groove (17), and a spring (18) is connected between the first slide (8) and the strip groove (17).

2. The waste heat recovery device for a tempering furnace according to claim 1, characterized in that, The transmission mechanism includes a first steering helical gear (36), which is coaxially connected to the rotating end of the electric fan (35). A linkage shaft (38) is rotatably connected to the top of the docking cylinder (34). The linkage shaft (38) passes through the docking cylinder (34). A second steering helical gear (37) that meshes with the first steering helical gear (36) is coaxially connected to the bottom end of the linkage shaft (38). A horizontal push rod (5) that cooperates with the second slide (6) is connected to the top of the linkage shaft (38). An elastic rubber rod (7) is provided at the end of the horizontal push rod (5).

3. The waste heat recovery device for a tempering furnace according to claim 1, characterized in that, The connecting motherboard (1) is provided with a forward heat exchange pipe (14) and a reverse heat exchange pipe (15). The forward heat exchange pipe (14) and the reverse heat exchange pipe (15) are both connected to the annular heat exchange tube group (16). The heat-insulating air-conducting box (11) is provided with a first circulation pump (41). The forward heat exchange pipe (14) and the reverse heat exchange pipe (15) are respectively connected to the corresponding ports of the first circulation pump (41). The annular heat exchange tube group (16) has a plurality of first heat exchange fins (33) evenly distributed in the inner circumference.

4. The waste heat recovery device for a tempering furnace according to claim 1, characterized in that, The first fitting plate (10) is connected to a plurality of circulation pipes (21) that are connected to the corresponding heat exchange tubes (26); each circulation pipe (21) is connected to a connecting sleeve (22) at one end near the corresponding heat exchange tube (26), the heat exchange tube (26) passes through the corresponding connecting sleeve (22), and the heat exchange tube (26) is provided with a plurality of through holes that are connected to the corresponding connecting sleeves (22); the end of the circulation pipe (21) near the heat insulation air box (11) is connected to a second circulation pump (40), and a transition heat exchange tube (39) is connected between the second circulation pump (40) and the heat exchange tube (26), and the bottom end of the heat exchange tube (26) is rotatably connected to the transition heat exchange tube (39).

5. A waste heat recovery device for a tempering furnace according to claim 4, characterized in that, The top side of the heat-insulating air-conducting box (11) is provided with a strip-shaped opening (32), and a closed sliding cover (31) that is rotatably connected to the heat exchange tube (26) is attached to the strip-shaped opening (32). The closed sliding cover (31) is fixedly connected to the circulation tube (21).

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