Temperature-controlled heat exchange type gas hot-air furnace

Abstract

The utility model discloses a kind of temperature control heat exchange type gas hot air furnace, including combustion chamber and heating bin being set on combustion chamber, the bottom of the heating bin is close to left side and is provided with hot air inlet being communicated with combustion chamber inner cavity, the utility model in use, through servo motor drives rotating rod rotation and drives dust removal brush rotation, further can automatically clean dust adhered on filter screen in flue gas emission process, it is favorable to improve the working efficiency of device, and through the meshing of worm and worm wheel can drive rotating shaft rotation, and drive first L-shaped scraper and second L-shaped scraper rotation, so that it can also dust cleaning on the inner wall of heating bin, prevent dust in flue gas adhere on the inner wall of heating bin, and through the work of dust extraction pump can be sucked into dust collection tank in dusting raised dust, to avoid dust accumulation influence heating effect of heating bin.

Description

Technical Field

[0001] This utility model relates to the field of hot air furnace technology, and in particular to a temperature-controlled heat exchange gas-fired hot air furnace. Background Technology

[0002] Hot blast stoves are thermal power machines that began to be widely used in my country in the late 1970s. They have become a replacement for electric heat sources and traditional steam power sources in many industries. Hot blast stoves come in many varieties and series, classified by coal feeding method as hand-fired and machine-fired, and by fuel type as coal, oil, gas, etc. The heat exchange type gas-fired hot blast stove is one of them.

[0003] When hot air furnaces heat flue gas for emission, the flue gas contains a lot of dust and impurities. Therefore, it is necessary to filter the dust and impurities in the flue gas during emission. Existing hot air furnace equipment is difficult to clean the filter screen automatically, which causes the filter screen to be frequently blocked and requires frequent unblocking, reducing the working efficiency of the equipment. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a temperature-controlled heat exchange gas-fired hot air furnace.

[0005] One of the objectives of this utility model is achieved through the following technical solution:

[0006] A temperature-controlled heat exchange gas-fired hot air furnace includes a combustion chamber and a heating chamber disposed on the combustion chamber. A hot air inlet communicating with the inner cavity of the combustion chamber is located near the bottom left side of the heating chamber. A heat exchange tube is provided inside the heating chamber, with an inlet pipe and an outlet pipe fixedly connected to both ends of the heat exchange tube. A cleaning mechanism is provided inside the heating chamber for cleaning the inner wall of the heating chamber. A purification cylinder is located on the top right side of the heating chamber, with a guide pipe inserted and fixed to the bottom of the purification cylinder. A hot air outlet is located on the top right side of the heating chamber, with the bottom end of the guide pipe inserted into the hot air outlet. The inner cavity of the purification cylinder is slidably connected with a first annular frame and a second annular frame. The inner cavity of the first annular frame is provided with a filter screen, and the inner cavity of the second annular frame is provided with a purification layer. Two symmetrical pull rods are fixedly connected through the first and second annular frames, and the left ends of the two pull rods are fixedly connected to the same sealing cover. A smoke exhaust pipe is inserted and fixedly connected to the sealing cover. An annular scraper is attached to the right side of the inner cavity of the purification cylinder. The right ends of the two pull rods are fixedly connected to the annular scraper. A dust collection mechanism is provided directly below the hot air outlet. The dust collection mechanism is used to collect dust that falls on the filter screen.

[0007] Furthermore, the cleaning mechanism includes a first L-shaped scraper and a second L-shaped scraper, which are respectively fitted onto the bottom right side and top left side of the inner cavity of the heating chamber. The heating chamber has two symmetrical cavities, and each cavity has a first through hole communicating with the inner cavity. A rotating shaft is rotatably connected to the inner cavity of each of the two first through holes. One end of the rotating shaft is rotatably connected to the inner wall of the cavity, and the other ends of the two rotating shafts are fixedly connected to the first L-shaped scraper and the second L-shaped scraper, respectively. A worm gear is sleeved and fixed on the outer wall of each of the two rotating shafts, and a worm meshes with the rear side of the worm gear. The heating chamber... On the right side, near the top and bottom, there are second through holes that communicate with the inner cavities of adjacent cavities. The right ends of the two worm gears pass through the inner cavities of the adjacent second through holes and are fixedly connected to driven bevel gears. The right side of the driven bevel gears meshes with transmission bevel gears. The right wall of the heating chamber is fixedly connected to a first connecting plate, and a first bearing is provided on the first connecting plate. A rotating rod is rotatably connected to the inner cavity of the first bearing, and both ends of the rotating rod are fixedly connected to adjacent transmission bevel gears. A servo motor is provided at the bottom of the first connecting plate, and a driving gear is fixedly connected to the power output end of the servo motor. A driven gear that meshes with the driving gear is sleeved and fixed on the outer wall of the rotating rod.

[0008] Furthermore, a second bearing is provided at the center of the right side of the purification cylinder, and a drive shaft is rotatably connected to the inner cavity of the second bearing. The left end of the drive shaft passes through the inner cavity of the annular scraper and is fixedly connected to two symmetrical dust removal brushes. The dust removal brushes are fitted to the filter screen. A driven grooved wheel is fixedly connected to the right end of the drive shaft. A transmission grooved wheel is sleeved and fixed on the outer wall of the worm gear at the top. A belt is provided between the transmission grooved wheel and the driven grooved wheel, and the transmission grooved wheel and the driven grooved wheel are connected by belt drive.

[0009] Furthermore, the dust collection mechanism includes a dust collection box located directly below the hot air outlet. A support rod is fixedly connected to the right side of the dust collection box. A first through groove adapted to the size of the dust collection box is opened on the right wall of the heating chamber. The right end of the support rod passes through the inner cavity of the first through groove and is fixedly connected to a sealing plate. A handle is provided on the right side of the sealing plate. A square hole is opened on the sealing plate, and a T-shaped square rod adapted to it is slidably connected to the inner cavity of the square hole. The longest end of the T-shaped square rod is fixedly connected to the heating chamber. A horizontal plate is fixedly connected to the right wall of the heating chamber near the top, and a first L-shaped rod is slidably connected to the horizontal plate. A first spring is sleeved on the outer wall of the first L-shaped rod, and the two ends of the first spring are fixedly connected to the first L-shaped rod and the horizontal plate, respectively. A first blind hole adapted to the first L-shaped rod is opened at the top of the sealing plate, and the longest end of the first L-shaped rod is inserted into the inner cavity of the first blind hole.

[0010] Furthermore, a rectangular scraper is attached to the left side of the inner cavity of the dust collection box, and an L-shaped traction rod is fixedly connected to the right side of the rectangular scraper. A second through groove is opened on the right side of the dust collection box, and a baffle is attached to the right side of the second through groove. The other end of the L-shaped traction rod passes through the second through groove and the baffle and extends to the outside of the dust collection box.

[0011] Furthermore, a second connecting plate is fixedly connected to the bottom of the left wall of the heating chamber, and a dust collection box is provided at the bottom of the second connecting plate. A dust pump is provided at the top of the second connecting plate, and a dust discharge pipe is provided at the outlet end of the dust pump. The bottom end of the dust discharge pipe passes through the top of the dust collection box and communicates with the inner cavity of the dust collection box. A dust suction pipe is provided at the inlet end of the dust pump, and the other end of the dust suction pipe passes through the outer wall of the heating chamber and communicates with the inner cavity of the heating chamber.

[0012] Furthermore, the inner cavity of the hot air inlet is slidably connected to a matching movable cylinder, and a slot is provided on the right wall of the movable cylinder. A connecting rod is fixedly connected to the left side of the movable cylinder. A third through groove matching the connecting rod is provided on the outer wall of the heating chamber, and the left end of the connecting rod penetrates the inner cavity of the third through groove and is fixedly connected to an arc-shaped cover plate. A second L-shaped rod is slidably connected to the arc-shaped cover plate, and a second spring is sleeved on the outer wall of the second L-shaped rod. The two ends of the second spring are fixedly connected to the second L-shaped rod and the arc-shaped cover plate, respectively. A second blind hole is provided on the left side wall of the heating chamber, and the second blind hole is located above the third through groove.

[0013] Furthermore, an L-shaped plate is provided on the top left side of the purification cylinder, and a third L-shaped rod is slidably connected to the L-shaped plate. A fixing ring is sleeved and fixed on the outer wall of the third L-shaped rod, and a third spring is sleeved on the outer side of the third L-shaped rod. The two ends of the third spring are fixedly connected to the fixing ring and the L-shaped plate respectively. A third blind hole is opened on the top of the sealing cover, and the longest end of the third L-shaped rod is inserted into the inner cavity of the third blind hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. A servo motor drives a rotating rod to rotate, and the meshing of the transmission bevel gear and the driven bevel gear drives the worm gear to rotate synchronously. Then, through the transmission pulley, driven pulley and belt, the transmission shaft rotates, thereby driving the dust removal brush to rotate. This allows for automatic cleaning of dust adhering to the filter screen during flue gas emission, which helps improve the working efficiency of the device. The meshing of the worm gear and worm wheel drives the rotating shaft to rotate, which in turn drives the first L-shaped scraper and the second L-shaped scraper to rotate, thus cleaning the inner wall of the heating chamber and preventing dust in the flue gas from adhering to the inner wall of the heating chamber. The operation of the dust pump can pump the dust raised during cleaning into the dust collection box, thereby avoiding dust accumulation that affects the heating effect of the heating chamber.

[0016] 2. The dust collection box can collect dust that falls from the filter screen. By pulling the first L-shaped rod, the dust can be disengaged from the inner cavity of the first blind hole. This allows the handle to be pulled and the sealing plate to be moved away from the heating chamber, thus pulling the collection box to the first through slot. Then, by pulling the L-shaped traction rod, the rectangular scraper can be moved horizontally to the right, pushing the dust collected in the dust collection box out. This makes it easier for staff to collect the dust and reduces their workload.

[0017] 3. By pulling the third L-shaped rod out of the inner cavity of the third blind hole, the sealing cover can be pulled away from the purification cylinder, and the purification layer and filter screen can be pulled out of the purification cylinder for easy disassembly and replacement. At the same time, the annular scraper can also clean the dust adhering to the inner wall of the purification cylinder, improving the cleanliness of the purification cylinder and thus ensuring the purification effect.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main view structure of this embodiment;

[0020] Figure 2 This is a cross-sectional structural diagram of this embodiment;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the movable cylinder in this embodiment;

[0022] Figure 4 for Figure 1 Enlarged view of the structure at point A in the middle;

[0023] Figure 5 for Figure 1 Enlarged view of the structure at point B;

[0024] Figure 6 for Figure 1 Enlarged view of the structure at point C.

[0025] In the diagram: 1. Combustion chamber; 2. Heating chamber; 3. Purification cylinder; 4. Heat exchange tube; 5. Inlet pipe; 6. Outlet pipe; 7. Hot air inlet; 8. Hot air outlet; 9. Sealing cover; 10. Exhaust pipe; 11. First annular frame; 12. Filter screen; 13. Second annular frame; 14. Purification layer; 15. Pull rod; 16. Movable cylinder; 17. Slot; 18. Connecting rod; 19. Rotating shaft; 20. Arc-shaped cover plate; 21. Second L-shaped rod; 22. Second spring; 23. Worm gear; 24. Worm; 25. Driven bevel gear; 26. Transmission bevel gear; 27. Rotating rod; 28. Servo motor; 2 9. Driving gear; 30. Driven gear; 31. First L-shaped scraper; 32. Second L-shaped scraper; 33. Annular scraper; 34. Drive shaft; 35. Dust removal brush; 36. Driven grooved wheel; 37. Transmission grooved wheel; 38. Belt; 39. Dust pump; 40. Suction pipe; 41. Dust collection box; 42. Dust discharge pipe; 43. Third spring; 44. Dust collection box; 45. Support rod; 46. Sealing plate; 47. T-shaped square rod; 48. First L-shaped rod; 49. First spring; 50. Rectangular scraper; 51. Baffle; 52. L-shaped traction rod; 53. Third L-shaped rod; 54. Fixing ring. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 6 The present invention provides the following technical solution:

[0030] A temperature-controlled heat exchange gas-fired hot air furnace includes a combustion chamber 1 and a heating chamber 2 disposed on the combustion chamber 1. A hot air inlet 7, communicating with the inner cavity of the combustion chamber 1, is located near the bottom left side of the heating chamber 2. A heat exchange tube 4 is disposed within the inner cavity of the heating chamber 2, with an inlet pipe 5 and an outlet pipe 6 fixedly connected to both ends of the heat exchange tube 4, respectively. A cleaning mechanism is provided within the inner cavity of the heating chamber 2 for cleaning the inner wall of the heating chamber 2. A purification cylinder 3 is disposed on the top right side of the heating chamber 2, with a guide pipe inserted and fixed to the bottom of the purification cylinder 3. A hot air outlet 8 is located near the top right side of the heating chamber 2, with the bottom end of the guide pipe inserted into the inner cavity of the hot air outlet 8. A first annular frame 11 and a second annular frame 11 are slidably connected to the inner cavity of the purification cylinder 3. The first annular frame 11 has a filter screen 12 inside, and the second annular frame 13 has a purification layer 14 inside. Two symmetrical pull rods 15 are fixedly connected through the first annular frame 11 and the second annular frame 13. The left ends of the two pull rods 15 are fixedly connected to the same sealing cover 9. A smoke exhaust pipe 10 is inserted and fixed to the sealing cover 9. An annular scraper 33 is attached to the right side of the inner cavity of the purification cylinder 3. The right ends of the two pull rods 15 are fixedly connected to the annular scraper 33. The sealing cover 9 can drive the annular scraper 33 to move horizontally, thereby removing the dust adhering to the inner wall of the purification cylinder 3. A dust collection mechanism is provided directly below the hot air outlet 8. The dust collection mechanism is used to collect the dust that falls from the filter screen 12.

[0031] The cleaning mechanism includes a first L-shaped scraper 31 and a second L-shaped scraper 32, which are respectively fitted to the bottom right side and top left side of the inner cavity of the heating chamber 2. The heating chamber 2 has two symmetrical cavities, and each cavity has a first through hole at the top and bottom that communicates with the inner cavity. A rotating shaft 19 is rotatably connected to the inner cavity of each of the two first through holes. One end of the rotating shaft 19 is rotatably connected to the inner wall of the cavity, and the other ends of the two rotating shafts 19 are fixedly connected to the first L-shaped scraper 31 and the second L-shaped scraper 32, respectively. A worm gear 23 is sleeved and fixed to the outer wall of each of the two rotating shafts 19, and a worm 24 meshes with the rear side of the worm gear 23. A second through hole communicating with the inner cavity of the adjacent cavity is opened on the right side of the heating chamber 2 near the top and bottom. The right ends of the two worms 24 pass through the adjacent cavity. Adjacent to the second perforated inner cavity, both are fixedly connected to driven bevel gears 25, and the right side of the driven bevel gears 25 is meshed with a transmission bevel gear 26. The right wall of the heating chamber 2 is fixedly connected to a first connecting plate, and a first bearing is provided on the first connecting plate. The inner cavity of the first bearing is rotatably connected to a rotating rod 27, and both ends of the rotating rod 27 are fixedly connected to the adjacent transmission bevel gears 26. A servo motor 28 is provided at the bottom of the first connecting plate, and a driving gear 29 is fixedly connected to the power output end of the servo motor 28. A driven gear 30 that meshes with the driving gear 29 is sleeved and fixed on the outer wall of the rotating rod 27. The servo motor 28 drives the first L-shaped scraper 31 and the second L-shaped scraper 32 to clean the dust adhering to the inner wall of the heating chamber 2 when rotating at a certain angle, so that the dust falls to the bottom of the inner cavity of the heating chamber 2, thereby improving the heating effect of the heating chamber 2.

[0032] A second bearing is located at the center of the right side of the purification cylinder 3, and a drive shaft 34 is rotatably connected to the inner cavity of the second bearing. The left end of the drive shaft 34 passes through the inner cavity of the annular scraper 33 and is fixedly connected to two symmetrical dust removal brushes 35. The dust removal brushes 35 are fitted to the filter screen 12. A driven grooved wheel 36 is fixedly connected to the right end of the drive shaft 34. A drive grooved wheel 37 is sleeved and fixed on the outer wall of the worm gear 24 at the top. A belt 38 is provided between the drive grooved wheel 37 and the driven grooved wheel 36, and the drive grooved wheel 37 and the driven grooved wheel 36 are connected by the belt 38. The worm gear 24 is driven to rotate by the servo motor 28, and the drive shaft 34 is driven to rotate by the drive grooved wheel 37, the driven grooved wheel 36 and the belt 38. The rotation of the drive shaft 34 drives the dust removal brushes 35 to rotate, thereby automatically cleaning the dust adhering to the filter screen 12 and avoiding the filter screen 12 from becoming clogged and affecting the working efficiency of the equipment.

[0033] The dust collection mechanism includes a dust collection box 44, which is located directly below the hot air outlet 8. A support rod 45 is fixedly connected to the right side of the dust collection box 44. A first through groove adapted to the size of the dust collection box 44 is opened on the right wall of the heating chamber 2. The right end of the support rod 45 passes through the inner cavity of the first through groove and is fixedly connected to a sealing plate 46. A handle is provided on the right side of the sealing plate 46. A square hole is opened on the sealing plate 46, and a matching T-shaped square rod 47 is slidably connected to the inner cavity of the square hole. The longest end of the T-shaped square rod 47 is fixedly connected to the heating chamber 2. A horizontal plate is fixedly connected to the right wall of the heating chamber 2 near the top, and a sliding connection is made on the horizontal plate. A first L-shaped rod 48 is provided, and a first spring 49 is sleeved on the outer wall of the first L-shaped rod 48. The two ends of the first spring 49 are fixedly connected to the first L-shaped rod 48 and the cross plate, respectively. A first blind hole adapted to the first L-shaped rod 48 is opened on the top of the sealing plate 46. The longest end of the first L-shaped rod 48 is inserted into the inner cavity of the first blind hole. The dust collection box 44 can be used to collect the dust that falls on the filter screen 12. After the first L-shaped rod 48 is pulled out of the inner cavity of the first blind hole, the handle can be pulled to pull the dust collection box 44 into the inner cavity of the first through groove, so as to facilitate the cleaning and collection of the dust collected in the dust collection box 44.

[0034] A rectangular scraper 50 is attached to the left side of the inner cavity of the dust collection box 44, and an L-shaped traction rod 52 is fixedly connected to the right side of the rectangular scraper 50. A second through slot is opened on the right side of the dust collection box 44, and a baffle 51 is attached to the right side of the second through slot. The other end of the L-shaped traction rod 52 passes through the second through slot and the baffle 51 and extends to the outside of the dust collection box 44. By pulling the L-shaped traction rod 52 to move horizontally to the right, the rectangular scraper 50 can be moved to the right synchronously, so that the dust collected in the dust collection box 44 can be discharged from the second through slot, which is convenient for the staff to collect and helps to reduce the workload of the staff.

[0035] A second connecting plate is fixedly connected to the bottom left wall of the heating chamber 2, and a dust collection box 41 is provided at the bottom of the second connecting plate. A dust pump 39 is provided at the top of the second connecting plate, and a dust discharge pipe 42 is provided at the air outlet of the dust pump 39. The bottom end of the dust discharge pipe 42 passes through the top of the dust collection box 41 and is connected to the inner cavity of the dust collection box 41. A dust suction pipe 40 is provided at the air inlet of the dust pump 39, and the other end of the dust suction pipe 40 passes through the outer wall of the heating chamber 2 and is connected to the inner cavity of the heating chamber 2. By operating the dust pump 39, the dust raised in the inner cavity of the heating chamber 2 can be drawn into the dust collection box 41, thereby improving the dust removal effect of the heating chamber 2.

[0036] The inner cavity of the hot air inlet 7 is slidably connected to a matching movable cylinder 16, and a slot 17 is provided on the right wall of the movable cylinder 16. A connecting rod 18 is fixedly connected to the left side of the movable cylinder 16. A third through groove matching the connecting rod 18 is provided on the outer wall of the heating chamber 2, and the left end of the connecting rod 18 passes through the inner cavity of the third through groove and is fixedly connected to an arc-shaped cover plate 20. A second L-shaped rod 21 is slidably connected to the arc-shaped cover plate 20, and a second spring 22 is sleeved on the outer wall of the second L-shaped rod 21. The two ends of the second spring 22 are respectively fixed to the second L-shaped rod 21 and the arc-shaped cover plate 20. The heating chamber 2 is connected in a fixed manner. A second blind hole is provided on the left side wall of the heating chamber 2, and the second blind hole is located above the third through slot. When the equipment is performing smoke exhaust operation, the arc-shaped cover plate 20 can be pulled upward and the longest end of the second L-shaped rod 21 can be inserted into the inner cavity of the second blind hole. This allows the movable cylinder 16 to be moved upward and the slot 17 to be moved into the heating chamber 2. This allows the flue gas discharged from the combustion chamber 1 to be discharged into the heating chamber 2 through the hot air inlet 7 and then through the slot 17. Conversely, when cleaning the heating chamber 2, the movable cylinder 16 can be reset downward and the hot air inlet 7 can be closed.

[0037] An L-shaped plate is provided on the top left side of the purification cylinder 3, and a third L-shaped rod 53 is slidably connected to the L-shaped plate. A fixing ring 54 is sleeved and fixed on the outer wall of the third L-shaped rod 53, and a third spring 43 is sleeved on the outer side of the third L-shaped rod 53. The two ends of the third spring 43 are fixedly connected to the fixing ring 54 and the L-shaped plate, respectively. A third blind hole is opened on the top of the sealing cover 9, and the longest end of the third L-shaped rod 53 is inserted into the inner cavity of the third blind hole. By inserting the longest end of the third L-shaped rod 53 into the inner cavity of the third blind hole, the sealing cover 9 and the purification cylinder 3 can be snapped and fixed, thereby improving the stability of the connection between the sealing cover 9 and the purification cylinder 3.

[0038] Working Principle: In use, the arc-shaped cover plate 20 is first pulled upwards, and the movable cylinder 16 is moved upwards via the connecting rod 18, so that the slot 17 is connected to the inner cavity of the heating chamber 2. Then, the longest end of the second L-shaped rod 21 is inserted into the inner cavity of the second blind hole and the position of the movable cylinder 16 is fixed, so that the flue gas discharged from the combustion chamber 1 is discharged into the heating chamber 2 through the hot air inlet 7 and the slot 17. Through the connection of the air inlet pipe 5, the heat exchange pipe 4 and the air outlet pipe 6, the gas in the heat exchange pipe 4 is heated by the heat exchange capacity of the heat exchange pipe 4, and the heated gas is discharged from the air outlet pipe 6. Then, the flue gas rises and exits from the hot air outlet. The flue gas is discharged into the purification cylinder 3. The filter screen 12 filters out dust, and the purification layer 14 further purifies the flue gas before it is discharged from the exhaust pipe 10. When cleaning the heating chamber 2 and the filter screen 12, the movable cylinder 16 is first pulled downwards to reset. Then, the servo motor 28 and the dust pump 39 are started. The servo motor 28 drives the first L-shaped scraper 31 and the second L-shaped scraper 32 to rotate reciprocally at a set angle, thus cleaning the inner wall of the heating chamber 2. The dust raised by the dust pump 39 is then pumped into the dust collection box 41. Furthermore, the transmission groove wheel 37 and the driven groove wheel 36... The transmission connection can drive the transmission shaft 34 to rotate, which in turn drives the dust removal brush 35 to rotate and clean the dust adhering to the filter screen 12, causing the dust to fall off and be collected into the dust collection box 44. After dust removal is completed, the first L-shaped rod 48 can be pulled to overcome the resistance of the first spring 49 and move upward, disengaging from the inner cavity of the first blind hole. Then, the handle can be pulled to move the sealing plate 46 away from the heating chamber 2, thereby allowing the dust collection box 44 to be moved into the inner cavity of the first through groove via the support rod 45. Furthermore, by pulling the L-shaped traction rod 52, the rectangular scraper 50 can be moved horizontally to the right, allowing the dust in the dust collection box 44 to be discharged through the second through groove. The operator only needs to check the opening of the first through groove. Dust can be collected. In addition, when it is necessary to disassemble and replace the filter screen 12 and the purification layer 14, the third L-shaped rod 53 can be pulled to detach from the inner cavity of the third blind hole. Then, the sealing cover 9 is pulled to move horizontally to the left, and the first annular frame 11, the second annular frame 13 and the annular scraper 33 are pulled out from the purification cylinder 3 by the setting of the pull rod 15. During the horizontal movement of the annular scraper 33, the dust adhering to the inner wall of the purification cylinder 3 can also be scraped off, improving the cleanliness of the purification cylinder 3. After the first annular frame 11 and the second annular frame 13 are pulled out, the staff can disassemble and replace the filter screen 12 and the purification layer 14, thereby ensuring the dust removal and purification effect of the equipment on the flue gas.

[0039] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A temperature-controlled heat exchange type gas-fired hot air furnace, comprising a combustion chamber (1) and a heating chamber (2) disposed on the combustion chamber (1), characterized in that: The heating chamber (2) has a hot air inlet (7) at the bottom near the left side, which is connected to the inner cavity of the combustion chamber (1). The inner cavity of the heating chamber (2) is provided with a heat exchange tube (4), and the two ends of the heat exchange tube (4) are respectively fixedly connected to an air inlet pipe (5) and an air outlet pipe (6). The inner cavity of the heating chamber (2) is provided with a cleaning mechanism, which is used to clean the inner wall of the heating chamber (2). The top right side of the heating chamber (2) is provided with a purification cylinder (3), and the bottom of the purification cylinder (3) is fixedly connected with a guide pipe. The top right side of the heating chamber (2) has a hot air outlet (8), and the bottom end of the guide pipe is inserted into the inner cavity of the hot air outlet (8). The inner cavity of the purification cylinder (3) is slidably connected with a first annular frame (11). The first ring frame (11) has a filter screen (12) in its inner cavity and a purification layer (14) in its inner cavity. The first ring frame (11) and the second ring frame (13) have two symmetrical pull rods (15) that pass through and are fixed together. The left ends of the two pull rods (15) are fixedly connected to the same sealing cover (9). The sealing cover (9) is fixedly connected to a smoke exhaust pipe (10). The right side of the inner cavity of the purification cylinder (3) is fitted with an annular scraper (33). The right ends of the two pull rods (15) are fixedly connected to the annular scraper (33). A dust collection mechanism is provided directly below the hot air outlet (8). The dust collection mechanism is used to collect the dust that falls on the filter screen (12).

2. The temperature-controlled heat exchange type gas-fired hot air furnace as described in claim 1, characterized in that: The cleaning mechanism includes a first L-shaped scraper (31) and a second L-shaped scraper (32), and the first L-shaped scraper (31) and the second L-shaped scraper (32) are respectively attached to the bottom right side and the top left side of the inner cavity of the heating chamber (2). The heating chamber (2) has two symmetrical cavities, and the top and bottom of the inner cavity of the heating chamber (2) are provided with first through holes that communicate with the inner cavity. The inner cavities of the two first through holes are rotatably connected to a rotating shaft (19), and one end of the rotating shaft (19) is rotatably connected to the inner wall of the cavity. The other ends of the two rotating shafts (19) are respectively fixedly connected to the first L-shaped scraper (31) and the second L-shaped scraper (32). The outer walls of the two rotating shafts (19) are fitted with worm gears (23), and the rear side of the worm gears (23) is engaged with a worm (24). The heating chamber ( 2) The right side near the top and bottom is provided with a second through hole that communicates with the inner cavity of the adjacent cavity. The right ends of the two worm gears (24) pass through the inner cavity of the adjacent second through hole respectively, and are fixedly connected with driven bevel gears (25). The right side of the driven bevel gears (25) is meshed with a transmission bevel gear (26). The right wall of the heating chamber (2) is fixedly connected with a first connecting plate, and a first bearing is provided on the first connecting plate. The inner cavity of the first bearing is rotatably connected with a rotating rod (27), and the two ends of the rotating rod (27) are fixedly connected to the adjacent transmission bevel gears (26) respectively. The bottom of the first connecting plate is provided with a servo motor (28), and the power output end of the servo motor (28) is fixedly connected with a driving gear (29). The outer wall of the rotating rod (27) is sleeved and fixedly fitted with a driven gear (30) that meshes with the driving gear (29).

3. The temperature-controlled heat exchange type gas-fired hot air furnace as described in claim 2, characterized in that: A second bearing is provided at the center of the right side of the purification cylinder (3), and a drive shaft (34) is rotatably connected to the inner cavity of the second bearing. The left end of the drive shaft (34) passes through the inner cavity of the annular scraper (33) and is fixedly connected to two symmetrical dust removal brushes (35). The dust removal brushes (35) are fitted to the filter screen (12). A driven groove wheel (36) is fixedly connected to the right end of the drive shaft (34). A drive groove wheel (37) is sleeved and fixed on the outer wall of the worm (24) at the top. A belt (38) is provided between the drive groove wheel (37) and the driven groove wheel (36), and the drive groove wheel (37) and the driven groove wheel (36) are connected by the belt (38).

4. A temperature-controlled heat exchange gas-fired hot air furnace as described in claim 3, characterized in that: The dust collection mechanism includes a dust collection box (44), which is located directly below the hot air outlet (8). A support rod (45) is fixedly connected to the right side of the dust collection box (44). A first through groove adapted to the size of the dust collection box (44) is opened on the right wall of the heating chamber (2). The right end of the support rod (45) passes through the inner cavity of the first through groove and is fixedly connected to a sealing plate (46). A handle is provided on the right side of the sealing plate (46). A square hole is opened on the sealing plate (46), and a T-shaped square rod (47) adapted to it is slidably connected to the inner cavity of the square hole. The longest end of the T-shaped square rod (47) is fixedly connected to the heating chamber (2). A horizontal plate is fixedly connected to the right wall of the heating chamber (2) near the top, and a first L-shaped rod (48) is slidably connected to the horizontal plate. A first spring (49) is sleeved on the outer wall of the first L-shaped rod (48), and the two ends of the first spring (49) are fixedly connected to the first L-shaped rod (48) and the horizontal plate respectively. A first blind hole adapted to the first L-shaped rod (48) is opened at the top of the sealing plate (46), and the longest end of the first L-shaped rod (48) is inserted into the inner cavity of the first blind hole.

5. A temperature-controlled heat exchange gas-fired hot air furnace as described in claim 4, characterized in that: A rectangular scraper (50) is attached to the left side of the inner cavity of the dust collection box (44), and an L-shaped traction rod (52) is fixedly connected to the right side of the rectangular scraper (50). A second through groove is opened on the right side of the dust collection box (44), and a baffle (51) is attached to the right side of the second through groove. The other end of the L-shaped traction rod (52) passes through the second through groove and the baffle (51) and extends to the outside of the dust collection box (44).

6. A temperature-controlled heat exchange gas-fired hot air furnace as described in claim 1, characterized in that: A second connecting plate is fixedly connected to the bottom of the left wall of the heating chamber (2), and a dust collection box (41) is provided at the bottom of the second connecting plate. A dust pump (39) is provided at the top of the second connecting plate, and a dust discharge pipe (42) is provided at the air outlet of the dust pump (39). The bottom end of the dust discharge pipe (42) passes through the top of the dust collection box (41) and is connected to the inner cavity of the dust collection box (41). A dust suction pipe (40) is provided at the air inlet of the dust pump (39), and the other end of the dust suction pipe (40) passes through the outer wall of the heating chamber (2) and is connected to the inner cavity of the heating chamber (2).

7. A temperature-controlled heat exchange gas-fired hot air furnace as described in claim 1, characterized in that: The inner cavity of the hot air inlet (7) is slidably connected to a movable cylinder (16) that is adapted to it, and a slot (17) is provided on the right wall of the movable cylinder (16). A connecting rod (18) is fixedly connected to the left side of the movable cylinder (16). A third through slot adapted to the connecting rod (18) is provided on the outer wall of the heating chamber (2). The left end of the connecting rod (18) passes through the inner cavity of the third through slot and is fixedly connected to an arc-shaped cover plate (20). A second L-shaped rod (21) is slidably connected to the arc-shaped cover plate (20). A second spring (22) is sleeved on the outer wall of the second L-shaped rod (21). The two ends of the second spring (22) are fixedly connected to the second L-shaped rod (21) and the arc-shaped cover plate (20) respectively. A second blind hole is provided on the left side wall of the heating chamber (2), and the second blind hole is located above the third through slot.

8. A temperature-controlled heat exchange gas-fired hot air furnace as described in claim 1, characterized in that: An L-shaped plate is provided on the top left side of the purification cylinder (3), and a third L-shaped rod (53) is slidably connected to the L-shaped plate. A fixing ring (54) is sleeved and fixed on the outer wall of the third L-shaped rod (53), and a third spring (43) is sleeved on the outer side of the third L-shaped rod (53). The two ends of the third spring (43) are fixedly connected to the fixing ring (54) and the L-shaped plate respectively. A third blind hole is opened on the top of the sealing cover (9), and the longest end of the third L-shaped rod (53) is inserted into the inner cavity of the third blind hole.

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