Energy-saving preheating device for vacuum sintering furnace

Abstract

The application discloses an energy-saving preheating device for a vacuum sintering furnace, and particularly relates to the technical field of vacuum sintering furnaces, which comprises a box body, an equipment box is fixedly installed on the bottom surface of the box body, a positive sealing plate is fixedly installed on one side of the box body, and a furnace cover is rotatably connected to one side of the positive sealing plate. The pneumatic adjusting assembly is used to rotate and adjust the scheduling of the multiple heating pipes when the heating pipes are not used. When the heating pipes rotate, the cleaning sleeve slides on the surface of the heating pipes. Since the length of the first steel wire rope is in a fixed state, the second steel wire rope in the take-up wheel is pulled out along with the movement of the cleaning sleeve. The moving cleaning sleeve scrapes off the carbonized layer on the surface of the heating pipes, so that the surface of the multiple heating pipes can be cleaned in real time after the heating pipes are used.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum sintering furnace, in particular to an energy-saving preheating device for vacuum sintering furnace. BACKGROUND

[0002] The vacuum sintering furnace refers to the furnace for protective sintering of heated objects in a vacuum environment, and its heating methods are various, such as resistance heating, induction heating, microwave heating, etc. The vacuum sintering furnace is a furnace for protective sintering of heated objects by using induction heating, which can be divided into power frequency, intermediate frequency and high frequency types, and can be classified as a subclass of vacuum sintering furnace. The vacuum induction sintering furnace is a complete set of equipment for realizing sintering of hard alloy tool bits and various metal powder pressed bodies under vacuum or protective atmosphere by using the principle of intermediate frequency induction heating, and is designed for the industrial production of hard alloy, metal dysprosium and ceramic materials.

[0003] In the prior art, in order to reduce the temperature gradient, reduce the thermal stress, prevent the deformation of the workpiece, and improve the processing efficiency and product quality, the vacuum sintering furnace usually needs to be preheated before use. When the vacuum sintering furnace is preheated, quartz heating tubes, molybdenum heating rods, etc. are generally used to generate high temperature by means of intermediate frequency induction or resistance heating, so that the furnace chamber is preheated. However, the position of the quartz heating tube or the molybdenum heating rod is generally fixed during installation and use. Therefore, after long-term use, the metal surface of the quartz heating tube or the molybdenum heating rod will oxidize with oxygen in the high-temperature environment to form metal oxides, and long-term accumulation will form a carbonized layer or a scaling phenomenon. At this time, the heat conduction and heat dissipation effect of the quartz heating tube or the molybdenum heating rod will be affected, thereby affecting the preheating effect of the vacuum sintering furnace during later use. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides an energy-saving preheating device for vacuum sintering furnace to solve the problems raised in the background art.

[0005] The above technical purpose of the present application is achieved by the following technical scheme:

[0006] An energy-saving preheating device for vacuum sintering furnace, comprising a box body, a device box is fixedly installed on the bottom surface of the box body, a positive sealing plate is fixedly installed on one side of the box body, a furnace cover is rotatably connected to one side of the positive sealing plate, and a side sealing plate is fixedly installed on the other side of the box body.

[0007] A first mounting plate is fixedly installed on one side of the inner side of the box, and a second mounting plate is fixedly installed on one side of the inner side of the box. A furnace body is fixedly installed between the first mounting plate and the second mounting plate. A first mounting cover is provided on one side of the first mounting plate, and a second mounting cover is provided on one side of the second mounting plate. A plurality of connecting brackets are fixedly installed between the first mounting cover and the second mounting cover. A plurality of heating tubes are provided on the outer circular wall of the furnace body. A plurality of first mounting seats are rotatably connected to one side of the second mounting cover. One side of the first mounting seat is fixedly installed with the heating tubes. A plurality of second mounting seats are fixedly installed on one side of the first mounting cover. An electrode connector is fixedly installed on the inner side of the second mounting seat.

[0008] A mounting shell is fixedly sleeved on the outer circular wall of the heating tube. A positioning plate is fixedly installed on the outer circular wall of the heating tube. A first steel wire rope is fixedly installed at one end of the positioning plate. A cleaning sleeve is movably sleeved on the outer circular wall of the heating tube. The first steel wire rope passes through one side of the mounting shell and the cleaning sleeve and is fixedly installed. A take-up reel is rotatably connected to the top surface of the mounting shell. A second steel wire rope is wound inside the take-up reel. One end of the second steel wire rope is fixedly installed to the cleaning sleeve. A mounting cap is fixedly installed on one side of the mounting shell. A coil spring is fixedly sleeved inside the mounting cap. The inner circular wall of the coil spring is fixedly sleeved to the rotating shaft of the take-up reel.

[0009] A pneumatic adjustment component is provided on one side of the second mounting plate, which adjusts the angle of the multiple heating tubes when they are not in use, and at the same time allows the cleaning sleeve to clean the carbonized layer on the surface of the heating tubes.

[0010] By adopting the above technical solution, the pneumatic adjustment component allows multiple heating tubes to be rotated and adjusted when not in use. When the heating tubes rotate, the cleaning sleeve slides on their surface. Since the length of the first steel wire rope is fixed, the second steel wire rope inside the take-up reel is pulled out along with the movement of the cleaning sleeve. The moving cleaning sleeve then scrapes and cleans the carbonized layer on the surface of the heating tubes. When multiple heating tubes are in use, the pneumatic adjustment component resets the multiple heating tubes. The rebound force of the coil spring drives the take-up reel to rotate and wind up the second steel wire rope, thereby resetting the multiple cleaning sleeves. This achieves the effect of facilitating real-time surface cleaning of multiple heating tubes after use.

[0011] Preferably, the pneumatic adjustment assembly includes: an air reservoir cover, which is fixedly installed on one side of the second mounting plate; a pipe connector is fixedly installed on one side of the air reservoir cover, the pipe connector passing through and extending to the outside of the housing; a connecting cover is rotatably connected to one side of the air reservoir cover, the connecting cover being sealed to the air reservoir cover; a plurality of mounting cylinders are fixedly installed on one side of the connecting cover; a sealing plug is movably fitted inside the mounting cylinder; a telescopic rod is fixedly installed at one end of the sealing plug; a connecting rod is slidably connected inside the plurality of mounting shells; the inner top surface of the mounting shell is an inclined surface; and the outer circular wall surface of the telescopic rod is fixedly fitted with the connecting rod.

[0012] By adopting the above technical solution, an external air pump is connected to a pipe connector. During use, gas is injected into the interior of multiple mounting cylinders through a gas storage hood. Multiple telescopic rods then move the connecting rods, causing multiple originally tilted and open heating tubes to be lowered. One end of each heating tube then enters the interior of multiple second mounting seats and connects to multiple electrode connectors, thus creating a closed-loop power supply for the heating tubes. When the heating tubes are not in use, the gas inside the mounting cylinders is extracted, causing the connecting rods to slide inside the mounting shell, which in turn causes the heating tubes to rotate upwards. During this process, multiple cleaning sleeves slide along the surface of the heating tubes, cleaning the carbonized layer on their surface. Simultaneously, removing the heating tubes from the surface of the furnace body when not in use prevents the carbonized layer from accumulating and forming clumps between the heating tubes and the furnace body over a long period of time.

[0013] Preferably, a second guide wheel is rotatably connected to the inner top surface of the mounting housing, and a first guide wheel is rotatably connected to the bottom surface of the connecting rod. The inner circular walls of the second guide wheel and the first guide wheel are movably sleeved with the first wire rope. A mounting frame is fixedly installed on one side of the mounting housing, and two third guide wheels are rotatably connected inside the mounting frame. The inner circular walls of the third guide wheels are movably sleeved with the second wire rope.

[0014] By adopting the above technical solution, the direction of the first wire rope can be limited by the second guide wheel and the first guide wheel, and the direction of the second wire rope can be limited by the cooperation of the two third guide wheels, thereby preventing the first wire rope and the second wire rope from deviating during use.

[0015] Preferably, a limiting slide rail is fixedly installed on one side of both the first mounting plate and the second mounting plate. Both the second mounting cover and the first mounting cover are rotatably connected to the limiting slide rail. A toothed ring is fixedly sleeved on the outer circular wall of the first mounting cover. A transmission hole is opened on the top surface of the housing. A drive motor is fixedly installed on the top surface of the housing. A transmission gear is fixedly installed at one end of the drive shaft of the drive motor. The transmission gear is movably sleeved with the inner wall of the transmission hole. The transmission gear meshes with the toothed ring.

[0016] By adopting the above technical solution, the drive motor drives the transmission gear to rotate, which in turn causes the gear ring to drive the first and second mounting covers to rotate. Subsequently, multiple heating tubes will rotate, thereby improving the heating effect of the furnace body and making it heat evenly.

[0017] Preferably, a positioning shell is fixedly installed on one side of the interior of each of the second mounting bases, an electromagnet is fixedly installed inside the positioning shell, two positioning posts are movably sleeved inside the positioning plate, a first spring is movably sleeved on the outer circular wall of the positioning posts, and an adsorption iron plate is fixedly installed on one side of the two positioning posts.

[0018] By adopting the above technical solution, through the cooperation of electromagnet and adsorption iron plate, after the heating tube enters the interior of the second mounting base and connects with the electrode connector, the electromagnet electromagnetically adsorbs the adsorption iron plate, thereby preventing the heating tube from swaying when rotating.

[0019] Preferably, a collection frame is slidably connected inside the housing.

[0020] By adopting the above technical solution, the ejected layers cleaned from the surface of multiple heating tubes can be collected in a centralized manner through the collection box, preventing dust accumulation inside the box.

[0021] Preferably, a diffusion pump is fixedly installed inside the housing, and a connecting pipe is fixedly sleeved on the inner circular wall of the diffusion pump. The connecting pipe extends into the interior of the furnace body, and two docking valves are fixedly installed on one side of the furnace body.

[0022] By adopting the above technical solution, the external mechanical pump can be connected to the furnace body through two docking valves, and the diffusion pump can be connected to the furnace body for joint use through the connecting pipe.

[0023] Preferably, a plurality of threaded tubes are fixedly installed on the bottom surface of the equipment box, and an adjusting threaded column is connected to the internal thread of the threaded tube, and a foot pad is rotatably connected to the bottom surface of the adjusting threaded column.

[0024] By adopting the above technical solution, the height of the box can be adjusted when it is placed by adjusting the threaded column and threaded tube, thereby ensuring its levelness.

[0025] Preferably, an installation cap is fixedly installed on the outer circular wall of the installation cylinder, a baffle is fixedly installed inside the installation cap, a gas collecting hood is movably sleeved inside the baffle, a sealing plug is fixedly installed on the top surface of the gas collecting hood connecting shaft, a second spring is movably sleeved on the outer circular wall of the gas collecting hood connecting shaft, a plurality of exhaust holes are opened on the top surface of the baffle, and a circular through hole is opened on the outer circular wall of the installation cap.

[0026] By adopting the above technical solution, when multiple heating tubes are used, the high temperature generated by the multiple heating tubes will heat the residual gas inside the device cylinder. In turn, the high-pressure hot gas will push the gas collection cover, causing the sealing plug to move upward. Then, the high-pressure hot gas will be discharged to the outside through the exhaust hole and the circular through hole. In this way, the residual gas inside the device cylinder can be depressurized and discharged when the heating tubes are in use.

[0027] In summary, the present invention has the following main beneficial effects:

[0028] 1. This invention uses a pneumatic adjustment component to rotate and adjust the multiple heating tubes when they are not in use. When the heating tubes rotate, the cleaning sleeve slides on their surface. Since the length of the first steel wire rope is fixed, the second steel wire rope inside the take-up reel is pulled out along with the movement of the cleaning sleeve. The moving cleaning sleeve then scrapes and cleans the carbonized layer on the surface of the heating tubes, thereby achieving the effect of facilitating real-time surface cleaning of multiple heating tubes after use.

[0029] 2. This invention fills multiple mounting cylinders with gas through a gas storage hood. This causes multiple telescopic rods to move connecting rods, lowering multiple originally tilted and open heating tubes. Then, one end of each heating tube enters the interior of multiple second mounting seats. By extracting the gas from the mounting cylinders, the connecting rods slide inside the mounting shell, causing the heating tubes to rotate and lift upwards. When not in use, the heating tubes are removed from the surface of the furnace body, thus preventing the carbonized layer from accumulating and forming clumps between the heating tubes and the furnace body over a long period of time.

[0030] 3. The present invention can limit the direction of the second wire rope by using two third guide wheels in cooperation, thereby preventing the first and second wire ropes from deviating during use.

[0031] 4. The present invention drives the transmission gear to rotate by a drive motor, which in turn causes the gear ring to rotate the first mounting cover and the second mounting cover. Subsequently, multiple heating tubes will rotate, thereby improving the heating effect of the furnace body and making it heat evenly.

[0032] 5. In this invention, the electromagnet and the adsorption plate work together to prevent the heating tube from wobbling when it rotates after it enters the second mounting base and connects with the electrode connector.

[0033] 6. When multiple heating tubes are used, the high temperature generated by the multiple heating tubes will heat the residual gas inside the device cylinder. In turn, the high-pressure hot gas will push the gas collection cover, causing the sealing plug to move upward. Then, the high-pressure hot gas will be discharged to the outside through the exhaust hole and the circular through hole, thereby achieving the effect of depressurizing and discharging the residual gas inside the device cylinder when the heating tubes are in use. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the box structure of the present invention;

[0036] Figure 3 yes Figure 2 A magnified view of part A in the diagram;

[0037] Figure 4 This is a schematic diagram of the connecting pipe structure of the present invention;

[0038] Figure 5 This is a schematic diagram of the collection frame structure of the present invention;

[0039] Figure 6 This is a schematic diagram of the docking valve structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the furnace body structure of the present invention;

[0041] Figure 8 This is a schematic diagram of the first mounting cover structure of the present invention;

[0042] Figure 9 This is a schematic diagram of the second mounting base structure of the present invention;

[0043] Figure 10 This is a schematic diagram of the mounting shell structure of the present invention;

[0044] Figure 11 yes Figure 10 A magnified view of part B in the diagram;

[0045] Figure 12 yes Figure 10 A magnified view of part of C;

[0046] Figure 13 This is a schematic diagram of the mounting cylinder structure of the present invention;

[0047] Figure 14 yes Figure 13 A magnified view of part of D.

[0048] Figure 15 This is a schematic diagram of the cleaning sleeve structure of the present invention.

[0049] Reference numerals: 1. Housing; 2. Equipment box; 3. Front sealing plate; 4. Furnace cover; 5. Side sealing plate; 6. Foot pad; 7. Drive motor; 8. Transmission gear; 9. Diffusion pump; 10. First mounting plate; 11. Second mounting plate; 12. Furnace body; 13. Collection frame; 14. Threaded pipe; 15. Adjusting threaded column; 16. Connecting pipe; 17. Docking valve; 18. Pipe fitting; 19. Gear ring; 20. Transmission hole; 21. Limiting slide rail; 22. Connecting frame; 23. First mounting cover; 24. Second mounting cover; 25. Gas storage cover; 26. Connecting cover; 27. Heating tube; 28. First mounting base; 29. Second mounting base; 30. Electrode connector; 31. Mounting shell; 32. Electromagnet; 33. Cleaning sleeve; 34. Vent hole; 35. Connecting rod; 36. Mounting cylinder; 37. Mounting cap; 38. Telescopic rod; 39. First wire rope; 40. First guide wheel; 41. Positioning plate; 42. Positioning post; 43. First spring; 44. Adsorption iron plate; 45. Take-up reel; 46. Second wire rope; 47. Mounting cap; 48. Coil spring; 49. Mounting frame; 50. Third guide wheel; 51. Sealing plug; 52. Baffle; 53. Gas collection hood; 54. Second spring; 55. Sealing plug; 56. Second guide wheel. Detailed Implementation

[0050] 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.

[0051] Example: Reference Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 15A preheating device for an energy-saving vacuum sintering furnace includes: a housing 1, an equipment box 2 fixedly mounted on the bottom surface of the housing 1, a front sealing plate 3 fixedly mounted on one side of the housing 1, a furnace cover 4 rotatably connected to one side of the front sealing plate 3, and a side sealing plate 5 fixedly mounted on the other side of the housing 1; a first mounting plate 10 fixedly mounted on one side of the interior of the housing 1, a second mounting plate 11 fixedly mounted on one side of the interior of the housing 1, a furnace body 12 fixedly mounted between the first mounting plate 10 and the second mounting plate 11, a first mounting cover 23 provided on one side of the first mounting plate 10, a second mounting cover 24 provided on one side of the second mounting plate 11, a plurality of connecting brackets 22 fixedly mounted between the first mounting cover 23 and the second mounting cover 24, a plurality of heating tubes 27 provided on the outer circular wall of the furnace body 12, and a plurality of first mounting seats 28 rotatably connected to one side of the second mounting cover 24, with one side of the first mounting seat 28 connected to the heating tube. The heat pipe 27 is fixedly installed. Several second mounting seats 29 are fixedly installed on one side of the first mounting cover 23. An electrode connector 30 is fixedly installed on one side of the inner side of the second mounting seat 29. A mounting shell 31 is fixedly sleeved on the outer circular wall of the heating pipe 27. A positioning plate 41 is fixedly installed on the outer circular wall of the heating pipe 27. A first steel wire rope 39 is fixedly installed at one end of the positioning plate 41. A cleaning sleeve 33 is movably sleeved on the outer circular wall of the heating pipe 27. The first steel wire rope 39 passes through one side of the mounting shell 31 and the cleaning sleeve 33 and is fixedly installed. A take-up reel 45 is rotatably connected to the top surface of the mounting shell 31. A second steel wire rope 46 is wound inside the take-up reel 45. One end of the second steel wire rope 46 is fixedly installed to the cleaning sleeve 33. A mounting cap 47 is fixedly installed on one side of the mounting shell 31. A coil spring 48 is fixedly sleeved inside the mounting cap 47. The inner circular wall of the coil spring 48 is fixedly sleeved to the rotating shaft of the take-up reel 45.A pneumatic adjustment assembly is provided on one side of the second mounting plate 11, which adjusts the angle of the multiple heating tubes 27 when they are not in use, and simultaneously allows the cleaning sleeve 33 to clean the carbonized layer on the surface of the heating tubes 27. The pneumatic adjustment assembly includes: an air storage cover 25, which is fixedly installed on one side of the second mounting plate 11. A pipe connector 18 is fixedly installed on one side of the air storage cover 25, which penetrates and extends to the outside of the housing 1. A connecting cover 26 is rotatably connected to one side of the air storage cover 25, and the connecting cover 26 is sealed to the air storage cover 25. Several mounting cylinders 36 are fixedly installed on one side of the connecting cover 26. A sealing plug 51 is movably sleeved inside the mounting cylinder 36. A telescopic rod 38 is fixedly installed at one end of the sealing plug 51. A connecting rod 35 is slidably connected inside the interior of several mounting shells 31. The top surface of the interior of the mounting shell 31 is inclined. The outer circular wall of the telescopic rod 38 is fixedly sleeved with the connecting rod 35. The air is fed through an external air pump and the pipe connector 18. The system connects the heating elements, allowing gas to be filled into multiple mounting cylinders 36 through the gas storage hood 25 during use. Multiple telescopic rods 38 then move the connecting rods 35, lowering the previously tilted and open heating tubes 27. One end of each heating tube 27 enters the interior of multiple second mounting bases 29 and connects to multiple electrode connectors 30, thus creating a closed-loop power supply for the heating tubes 27. When the heating tubes 27 are not in use, the gas inside the mounting cylinders 36 is extracted, causing the connecting rods 35 to slide inside the mounting shell 31, raising the heating tubes 27. During this process, multiple cleaning sleeves 33 slide along the surface of the heating tubes 27, cleaning the carbonized layer. This process also prevents the carbonized layer from accumulating and forming clumps between the heating tubes 27 and the furnace body 12 when not in use.

[0052] Based on the above embodiments, refer to Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 Figure 13 and Figure 14Limiting slide rails 21 are fixedly installed on one side of the first mounting plate 10 and the second mounting plate 11. The second mounting cover 24 and the first mounting cover 23 are rotatably connected to the limiting slide rails 21. A toothed ring 19 is fixedly sleeved on the outer circular wall of the first mounting cover 23. A transmission hole 20 is opened on the top surface of the housing 1. A drive motor 7 is fixedly installed on the top surface of the housing 1. A transmission gear 8 is fixedly installed on one end of the drive shaft of the drive motor 7. The transmission gear 8 is movably sleeved with the inner wall of the transmission hole 20. The transmission gear 8 meshes with the toothed ring 19 and drives the transmission gear 8 through the drive motor 7. The wheel 8 rotates, causing the gear ring 19 to drive the first mounting cover 23 and the second mounting cover 24 to rotate. Subsequently, multiple heating tubes 27 rotate, thereby improving the heating effect of the furnace body 12 and ensuring uniform heating. Positioning shells 57 are fixedly installed on one side of each of the second mounting seats 29. Electromagnets 32 are fixedly installed inside the positioning shells 57. Two positioning posts 42 are movably sleeved inside the positioning plate 41. A first spring 43 is movably sleeved on the outer circular wall of the positioning posts 42. Adsorption plates 4 are fixedly installed on one side of the two positioning posts 42. 4. Through the cooperation of electromagnet 32 ​​and adsorption plate 44, after the heating tube 27 enters the second mounting base 29 and aligns with the electrode connector 30, electromagnet 32 ​​electromagnetically adsorbs the adsorption plate 44, thereby preventing the heating tube 27 from swaying during rotation. A mounting cap 37 is fixedly installed on the outer wall of the mounting cylinder 36. A baffle 52 is fixedly installed inside the mounting cap 37. A gas collecting hood 53 is movably sleeved inside the baffle 52. A sealing plug 55 is fixedly installed on the top surface of the connecting shaft of the gas collecting hood 53. The outer diameter of the connecting shaft of the gas collecting hood 53... The wall is movably fitted with a second spring 54. The top surface of the baffle 52 is provided with several exhaust holes 34. The outer circular wall of the mounting cap 37 is provided with a circular through hole. When multiple heating tubes 27 are in use, the high temperature generated by the multiple heating tubes 27 will heat the residual gas inside the mounting cylinder 36. Then, the high-pressure hot gas will push the gas collecting cover 53, causing the sealing plug 55 to move upward. Then, the high-pressure hot gas will be discharged to the outside through the exhaust holes 34 and the circular through hole. In this way, the residual gas inside the mounting cylinder 36 can be depressurized and discharged when the heating tubes 27 are in use.

[0053] Based on the above embodiments, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 , Figure 10 and Figure 12A collection frame 13 is slidably connected inside the housing 1. The collection frame 13 collects the ejected layer cleaned from the surfaces of multiple heating tubes 27, preventing dust accumulation inside the housing 1. A diffusion pump 9 is fixedly installed inside the housing 1. A connecting pipe 16 is fixedly sleeved on the inner circular wall of the diffusion pump 9, extending into the furnace body 12. Two docking valves 17 are fixedly installed on one side of the furnace body 12, allowing external mechanical pumps to be docked with the furnace body 12. Simultaneously, the connecting pipe 16 connects the diffusion pump 9 to the furnace body 12 for coordinated use. Several threaded pipes 14 are fixedly installed on the bottom surface of the equipment housing 2. Adjustable threaded columns 15 are threadedly connected inside the threaded pipes 14. Foot pads 6 are rotatably connected to the bottom surface of the adjusting threaded columns 15. Adjusting the threaded columns 15 and threaded pipes 14 allows for adjustment of the flow path within the housing 1. The height of the cable is adjusted during placement to ensure its levelness. A second guide wheel 56 is rotatably connected to the top surface of the mounting shell 31, and a first guide wheel 40 is rotatably connected to the bottom surface of the connecting rod 35. The inner circular walls of both the second guide wheel 56 and the first guide wheel 40 are movably sleeved with the first wire rope 39. A mounting frame 49 is fixedly installed on one side of the mounting shell 31. Two third guide wheels 50 are rotatably connected inside the mounting frame 49. The inner circular walls of the third guide wheels 50 are movably sleeved with the second wire rope 46. The direction of the first wire rope 39 can be limited by the second guide wheel 56 and the first guide wheel 40. The direction of the second wire rope 46 can be limited by the cooperation of the two third guide wheels 50, thereby preventing the first wire rope 39 and the second wire rope 46 from deviating during use. All of the above structures are made of high-temperature resistant metal.

[0054] Working principle: Please refer to Figures 1-15 As shown, the pneumatic adjustment assembly allows the multiple heating tubes 27 to rotate and adjust their arrangement when not in use. Furthermore, when the heating tubes 27 rotate, the cleaning sleeve 33 slides on their surface. Figure 9 , Figure 10 and Figure 15 As shown, since the length of the first wire rope 39 is fixed, the second wire rope 46 inside the take-up reel 45 will be pulled out along the movement of the cleaning sleeve 33. The moving cleaning sleeve 33 will then scrape and clean the carbonized layer on the surface of the heating tube 27. When multiple heating tubes 27 are in use, the pneumatic adjustment component will reset the multiple heating tubes 27. Then, the rebound force of the coil spring 48 will drive the take-up reel 45 to rotate and wind up the second wire rope 46, thereby resetting the multiple cleaning sleeves 33. This achieves the effect of facilitating real-time surface cleaning of multiple heating tubes 27 after use.

[0055] The pressure relief function of the mounting cylinder 36 and the activation of the mounting cap 37 when the heating tube is used at high temperature are used to discharge the gas generated by thermal expansion and prevent excessive pressure. The adsorption function of the electromagnet 32 ​​and the adsorption plate 44 is activated after the heating tube is in place and the circuit is closed to prevent the heating tube from swaying during rotation. The two are staggered in time: pressure relief occurs in the early stage of heating, and electromagnetic adsorption occurs after the operation is stable. Stable operation and safe pressure relief of the heating tube are achieved through time-sharing control.

[0056] The movement of the cleaning sleeve is then achieved by the pneumatic adjustment assembly driving the heating element to rotate, in conjunction with the take-up reel 45 and the coil spring 48, thereby... Figure 9 , Figure 10 , Figure 12 and Figure 15 The diagram clearly shows the guiding structures such as the first guide wheel 40, the second guide wheel 56, and the third guide wheel 50, ensuring that the wire rope does not deviate during movement. The cleaning sleeve can move along the axis of the heating tube. Therefore, the movement of the cleaning sleeve does not depend solely on the extension and retraction of the wire rope, but rather on the cooperation between the angle change of the heating tube and the take-up mechanism to achieve full-range sliding. Thus, it can be determined that this technical solution is feasible.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating device for an energy-saving vacuum sintering furnace, characterized in that, include: The box has an equipment box fixedly installed on its bottom surface, a front sealing plate fixedly installed on one side of the box, a furnace cover rotatably connected to one side of the front sealing plate, and a side sealing plate fixedly installed on the other side of the box. A first mounting plate is fixedly installed on one side of the inside of the box, a second mounting plate is fixedly installed on one side of the inside of the box, a furnace body is fixedly installed between the first mounting plate and the second mounting plate, a first mounting cover is provided on one side of the first mounting plate, a second mounting cover is provided on one side of the second mounting plate, several connecting brackets are fixedly installed between the first mounting cover and the second mounting cover, several heating tubes are provided on the outer circular wall of the furnace body, several first mounting seats are rotatably connected to one side of the second mounting cover, one side of the first mounting seat is fixedly installed with the heating tubes, several second mounting seats are fixedly installed on one side of the first mounting cover, and an electrode connector is fixedly installed on the inner side of the second mounting seat; A mounting shell is fixedly sleeved on the outer circular wall of the heating tube. A positioning plate is fixedly installed on the outer circular wall of the heating tube. A first steel wire rope is fixedly installed at one end of the positioning plate. A cleaning sleeve is movably sleeved on the outer circular wall of the heating tube. The first steel wire rope passes through one side of the mounting shell and the cleaning sleeve and is fixedly installed. A take-up reel is rotatably connected to the top surface of the mounting shell. A second steel wire rope is wound inside the take-up reel. One end of the second steel wire rope is fixedly installed to the cleaning sleeve. A mounting cap is fixedly installed on one side of the mounting shell. A coil spring is fixedly sleeved inside the mounting cap. The inner circular wall of the coil spring is fixedly sleeved to the rotating shaft of the take-up reel. A pneumatic adjustment assembly is provided on one side of the second mounting plate, which adjusts the angle of the multiple heating tubes when they are not in use. Simultaneously, it allows the cleaning sleeve to clean the carbonized layer on the surface of the heating tubes. The pneumatic adjustment assembly includes: an air reservoir cover, which is fixedly installed on one side of the second mounting plate; a pipe connector is fixedly installed on one side of the air reservoir cover, extending through and to the outside of the housing; a connecting cover is rotatably connected to one side of the air reservoir cover, sealingly connecting the connecting cover to the air reservoir cover; several mounting cylinders are fixedly installed on one side of the connecting cover; a sealing plug is movably fitted inside each mounting cylinder; a telescopic rod is fixedly installed at one end of each sealing plug; and connecting rods are slidably connected inside several mounting shells. The top surface of the mounting shell is inclined; the outer circular wall of the telescopic rod is fixedly fitted with the connecting rod; and the assembly is connected to the pipe connector via an external air pump. During use, gas is injected into the interior of multiple mounting cylinders through the gas storage hood. This causes multiple telescopic rods to move the connecting rods, lowering the previously tilted and open heating tubes. One end of each heating tube then enters the interior of multiple second mounting seats and connects to multiple electrode connectors, thus creating a closed-loop power supply for the heating tubes. When the heating tubes are not in use, the gas inside the mounting cylinders is extracted, causing the connecting rods to slide inside the mounting shell, which in turn causes the heating tubes to rotate and lift upwards. During this process, multiple cleaning sleeves slide along the surface of the heating tubes, cleaning the carbonized layer on their surface. Simultaneously, removing the heating tubes from the furnace body surface when not in use prevents the carbonized layer from accumulating and forming clumps between the heating tubes and the furnace body over a long period.

2. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: The top surface of the mounting housing is rotatably connected to a second guide wheel, and the bottom surface of the connecting rod is rotatably connected to a first guide wheel. The inner circular walls of both the second and first guide wheels are movably sleeved with the first wire rope. A mounting frame is fixedly installed on one side of the mounting housing. The mounting frame is rotatably connected to two third guide wheels. The inner circular walls of the third guide wheels are movably sleeved with the second wire rope. The direction of the first wire rope can be limited by the second guide wheel and the direction of the second wire rope can be limited by the cooperation of the two third guide wheels, thereby preventing the first and second wire ropes from deviating during use.

3. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: A mounting cap is fixedly installed on the outer circular wall of the mounting cylinder. A baffle is fixedly installed inside the mounting cap. A gas collecting hood is movably sleeved inside the baffle. A sealing plug is fixedly installed on the top surface of the gas collecting hood connecting shaft. A second spring is movably sleeved on the outer circular wall of the gas collecting hood connecting shaft. Several exhaust holes are opened on the top surface of the baffle. A circular through hole is opened on the outer circular wall of the mounting cap. When multiple heating tubes are in use, the high temperature generated by the multiple heating tubes will heat the residual gas inside the mounting cylinder. Then, the high-pressure hot gas will push the gas collecting hood, causing the sealing plug to move upward. Then, the high-pressure hot gas will be discharged to the outside through the exhaust holes and the circular through hole. In this way, the residual gas inside the mounting cylinder can be depressurized and discharged when the heating tubes are in use.

4. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: Limiting slide rails are fixedly installed on one side of both the first and second mounting plates. The second and first mounting covers are rotatably connected to the limiting slide rails. A toothed ring is fixedly sleeved on the outer circular wall of the first mounting cover. A transmission hole is opened on the top surface of the box. A drive motor is fixedly installed on the top surface of the box. A transmission gear is fixedly installed on one end of the drive shaft of the drive motor. The transmission gear is movably sleeved with the inner wall of the transmission hole. The transmission gear meshes with the toothed ring. The drive motor drives the transmission gear to rotate, which in turn causes the toothed ring to drive the first and second mounting covers to rotate. Then, multiple heating tubes will rotate accordingly, thereby improving the heating effect of the furnace body and making it heat evenly.

5. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: A positioning shell is fixedly installed on one side of the interior of several second mounting bases. An electromagnet is fixedly installed inside the positioning shell. Two positioning posts are movably sleeved inside the positioning plate. A first spring is movably sleeved on the outer circular wall of the positioning posts. An adsorption iron plate is fixedly installed on one side of the two positioning posts. Through the cooperation of the electromagnet and the adsorption iron plate, after the heating tube enters the interior of the second mounting base and connects with the electrode connector, the electromagnet electromagnetically adsorbs the adsorption iron plate, thereby preventing the heating tube from swaying when rotating.

6. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: The box is slidably connected to a collection frame, which can collect the pop-out layers cleaned from the surfaces of multiple heating tubes to prevent dust accumulation inside the box.

7. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: A diffusion pump is fixedly installed inside the housing. A connecting pipe is fixedly sleeved on the inner circular wall of the diffusion pump. The connecting pipe extends into the interior of the furnace body. Two docking valves are fixedly installed on one side of the furnace body. The external mechanical pump can be docked with the furnace body through the two docking valves. At the same time, the connecting pipe can connect the diffusion pump with the furnace body for joint use.

8. The preheating device for an energy-saving vacuum sintering furnace according to claim 1, characterized in that: Several threaded tubes are fixedly installed on the bottom surface of the equipment box. The internal threads of the threaded tubes are connected to adjusting threaded columns. The bottom surface of the adjusting threaded columns is rotatably connected to foot pads. By adjusting the threaded columns and threaded tubes, the height of the box can be adjusted when it is placed, thereby ensuring its levelness.

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