Zero-pressure type rectangular aluminum alloy melting furnace

Abstract

The invention relates to the technical field of smelting furnaces, and discloses a zero-pressure type rectangular aluminum alloy melting furnace. Comprising a preheating chamber, a melting chamber, a motorized chamber, a hole, a heat insulation baffle, a conveying column, a net chain type conveying belt, a first rotating rod, a first gear, a roller, a second gear, a pressing rod, a connecting rod, a third gear, a second rotating rod, a drying column, a conveying groove, a blocking net, a first outer skin, a second outer skin, a conveying belt, a fourth gear and a connecting plate. According to the aluminum alloy melting furnace, the labor cost is reduced, aluminum alloy raw materials can be fully and efficiently dried before melting, the raw materials can be disturbed during melting, the local temperature is prevented from being too high, and the melting quality and efficiency are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of melting furnaces, and in particular to a zero-pressure rectangular aluminum alloy melting furnace. Background Art

[0002] Aluminum alloys are widely used in modern industry. Aluminum alloy melting furnaces are a new type of high-efficiency, energy-saving aluminum melting furnace developed based on the aluminum smelting process. They are primarily used for melting and heat preservation of aluminum ingots, and they meet the requirements of aluminum smelting processes. However, defects such as pores, inclusions, and scale are prone to appear during the smelting process, ultimately affecting the properties of the smelted alloy.

[0003] Moisture on the surface of the aluminum alloy raw material and insufficient baking not only prolong the smelting time but also cause defects such as pinholes in the smelted aluminum alloy, reducing the smelting quality. Local overheating of the aluminum alloy during the smelting process can also cause defects such as pinholes. Therefore, drying the aluminum alloy raw material before smelting and ensuring uniform heating of the aluminum alloy during smelting are crucial to improving the quality of aluminum alloy smelting.

[0004] The invention patent with announcement number CN107860221B invented an aluminum alloy melting furnace to solve the above-mentioned problem. However, the method for uniformly heating the aluminum alloy is a traditional stirring device. The structure of the traditional stirring device occupies a large space and is not very suitable for rectangular aluminum alloy raw materials. In addition, when preheating the aluminum alloy raw materials, the patent only pushes the raw materials forward in a relatively rigid manner without turning the raw materials over. As a result, the preheating uniformity is not high and needs further improvement. Summary of the Invention

[0005] Based on the above problems, the present invention provides a zero-pressure rectangular aluminum alloy melting furnace, which integrates melting and preheating and drying, reduces labor costs, improves drying efficiency, and improves the smelting quality of aluminum alloys.

[0006] To solve the above technical problems, the present invention provides a zero-pressure rectangular aluminum alloy melting furnace, comprising a furnace body, wherein a preheating chamber, a melting chamber, and a maneuvering chamber are provided in the furnace body, wherein the maneuvering chamber is connected to the preheating chamber, and the melting chamber is provided with a discharge pipe; an opening is provided between the preheating chamber and the melting chamber, wherein an openable thermal insulation baffle is provided in the opening, and wherein the bottom wall of the opening is inclined toward the side where the melting chamber is located; a first heating device is provided in the preheating chamber, and a second heating device is provided in the melting chamber;

[0007] A stirring assembly is provided in the melting chamber, and a rotating rod 1 is provided in the motorized chamber for driving the stirring assembly to stir the melt; a cylindrical roller is provided horizontally at one end of the motorized chamber facing the preheating chamber and extending into the preheating chamber, the rotating rod 1 can drive the roller to rotate, and a pressing assembly is provided on the outer wall of the end of the roller extending into the preheating chamber; a gear 3 is provided on the side of the roller away from the motorized chamber, the circular surface of the gear 3 faces the roller, and a rotatable rotating rod 2 is provided on the side of the gear 3 facing away from the roller, the length direction of the rotating rod 2 is aligned with the center of the circular surface of the gear 3; the gear 3 can rotate with the roller or the rotating rod 2;

[0008] The preheating chamber is provided with an inclined and rotatable cylindrical drying column, the lower end of the drying column is close to the hole, and a feed port is provided on the wall of the preheating chamber on the high end side of the drying column, and the feed port is provided with a sealing door panel;

[0009] The outer side wall of the drying column is provided with a plurality of conveying grooves evenly arranged along the circumferential direction of the drying column, the conveying grooves are arranged along the length direction of the drying column, and the two ends of the conveying grooves pass through the two ends of the drying column; the outer periphery of the drying column is provided with a blocking net that wraps the drying column, and the drying column can rotate relative to the blocking net, an inclined discharge plate 1 is provided between the hole and the blocking net, an inclined discharge plate 2 is provided between the feed port and the blocking net, the discharge plate 1 and the discharge plate 2 are located on the same inclined surface, and discharge holes are provided at the connection between the blocking net and the discharge plate 1 and the discharge plate 2, and the two discharge holes are directly opposite to any one of the conveying grooves;

[0010] The end of the baffle near the feed port is provided with a fracture arranged in the circumferential direction of the drying column, the end of the fracture near the feed port is provided with an outer skin 1 arranged around the drying column, and the end of the fracture away from the feed port is provided with an outer skin 2 arranged around the drying column. A conveying belt is provided on the periphery of the outer skin 2, and the conveying belt is connected to the outer skin 2 by means of rack meshing. A gear 4 is provided between the gear 3 and the drying column, and a support pin connected to the inner wall of the preheating chamber is provided at the center of the gear 4. One end of the gear 4 is meshed with the gear 3, and the other end of the gear 4 is for the conveying belt to pass around, and the gear 4 and the conveying belt are connected by means of rack meshing; the outer wall of the outer skin 1 is provided with a connecting assembly, and the pressure rod drives the drying column to rotate by pressing the connecting assembly.

[0011] Furthermore, a rotating motor is provided at one end of the rotating rod away from the rotating block, and the rotating rod is connected to the output shaft end of the rotating motor; the conveying assembly includes conveying columns arranged at the four corners of the melting chamber, the length direction of the conveying columns is perpendicular to the feeding direction of the hole, the conveying columns are provided with a mesh chain conveyor belt that passes around the four conveying columns in sequence, the rotation of the conveying columns can drive the mesh chain conveyor belt to rotate, the mesh chain conveyor belt is provided with a window in an area facing the hole, and the mesh chain conveyor belt on the window side and the mesh chain conveyor belt on the side facing the window are both provided with a disturbance device A moving rod, the disturbance rod is arranged on the side of the window close to the motor room; both ends of the conveying column are provided with a rotating block which is inserted into the wall of the melting chamber and can rotate relative to the wall of the melting chamber, a conveying column close to the preheating chamber and located at the bottom end of the melting chamber, the rotating block at one end close to the motor room passes through the wall between the melting chamber and the motor room and extends into the motor room, and the end of the rotating block extending into the motor room away from the conveying column is connected to a rotating rod; the conveying column and the mesh chain conveyor belt are connected by rack engagement; the disturbance rod is arranged at an angle, and the lower end of the disturbance rod faces the bottom of the melting chamber.

[0012] Furthermore, the pressing assembly includes an extension rod arranged on the outer side wall of the roller, and the end of the extension rod away from the roller is provided with an arc-shaped pressure rod, and the arc center of the pressure rod is located at the central axis of the roller; the outer side wall of the roller close to the motor chamber is provided with a pin 1 that can rotate relative to the roller, and the extension line of the length of the pin 1 passes through the central axis of the roller, and the end of the pin 1 with a smaller cross-sectional area extends out of the roller and is provided with a connecting rod arranged along the length direction of the pin 1, and the cross-section of the connecting rod is square; the connecting rod can rotate with the roller to a position where gear three and rotating rod two are connected together, and at this time, rotating rod two can drive gear three to rotate.

[0013] Furthermore, a serrated convex tooth is provided on the top of the mesh chain conveyor belt between the two conveying columns at the bottom end of the melting chamber, and the serrated convex tooth is uneven in height.

[0014] Furthermore, a horizontal rod is provided at the mesh chain conveyor belt located on one side of the hole, and the horizontal rod is parallel to the conveying column. The top wall of the hole is provided with a vertical top groove, and the top of the thermal insulation baffle is located in the top groove. The side of the top groove facing the melting chamber is provided with a vertical slide groove 1, and the top of the thermal insulation baffle facing the melting chamber is provided with a slider 1 that passes through the slide groove 1 and extends into the melting chamber; the side of the horizontal rod facing the thermal insulation baffle is provided with two clamping blocks, both of which pass through the window and extend into the slide groove 1. The clamping blocks are horizontally arranged, and a slider 2 that can move relative to the thermal insulation baffle is provided between the two clamping blocks, and the slider 2 is tightly clamped by the two clamping blocks.

[0015] Furthermore, a second slide groove is provided on the side of the heat-insulating baffle facing the first slide groove, which is arranged along the length direction of the first slide groove and directly opposite to the first slide groove, and the end of the second slide block away from the clamping block is located in the second slide groove.

[0016] Furthermore, the outer periphery of the rotating rod 1 is provided with a gear 1 arranged around the rotating rod 1, and a plurality of gears 2 are provided between the roller and the gear 1, the gear 1 meshing with a gear 2 adjacent to it, and the two adjacent gears 2 mesh with each other, and one end of the roller close to the gear 2 meshes with the gear 2 adjacent to it. The centers of the circular surfaces of the gear 2 and the roller are provided with a fixed column connected to the wall of the motor room and can rotate relative to the wall of the motor room; the end of the rotating rod 2 away from the gear 3 is provided with a rotating motor 2, and the rotating motor 2 is connected to the inner wall of the melting chamber, and the side of the rotating motor 2 facing the gear 3 is provided with an annular track arranged around the rotating rod 2, and the side of the annular track facing the gear 3 is provided with a slide groove 3 with a convex cross-section, and the side of the gear 3 facing the rotating motor 2 is provided with a support rod extending toward the slide groove 3, and the end of the support rod close to the slide groove 3 is provided with a slider 3 located in the slide groove 3 and can slide along the slide groove 3, and the slider 3 is convex.

[0017] Furthermore, the connecting assembly includes a plurality of connecting plates uniformly arranged in the circumferential direction around the drying column. When the pressure rod rotates to a place of the outer skin along with the roller, the pressure rod will be blocked by one of the connecting plates, and the pressure rod presses the connecting plate to drive the drying column to rotate. When the pressure rod moves away from the connecting plate, it can move back along with the reversal of the roller without driving the drying column to rotate back. The side of the connecting plate facing the outer skin is an arc surface, and the end of the connecting plate close to the outer skin is provided with a through hole, and the through hole is provided with a semicircular ring passing through the through hole. The ring is welded to the outer skin, and a stopper connected to the outer skin is provided on one side of the connecting plate. When the drying column rotates, the stopper can block the connecting plate so that the connecting plate will not fall in the rotation direction of the drying column, so that the pressure rod can press the connecting plate; a fixing rod is provided at the center of the two circular surfaces of the drying column, and a fixing block is provided at the wall of the preheating chamber facing each fixing rod. The fixing rod is inserted into the fixing block on the corresponding side and can rotate relative to the fixed block; support rods connected to the fixed block are provided at both ends of the baffle net, and the fixing rods are arranged through the baffle net.

[0018] Furthermore, an air pump is provided on the outer wall of the preheating chamber, an air outlet of the air pump is provided with an air outlet pipe passing through the wall of the preheating chamber, an air inlet of the air pump is provided with an air inlet pipe, and an air outlet pipe is provided on the side wall of the motor room.

[0019] Furthermore, a notch one is provided at the bottom of the gear three, extending to the center of the gear three, and the notch one runs through the thickness direction of the gear three. A notch two is provided at one end of the rotating rod two close to the gear three, and the notch two and the notch one are located on the same side. When the roller rotates, the connecting rod can be rotated into the notch two and the notch one. At this time, the length direction of the connecting rod is set along the length direction of the rotating rod two. At this time, the rotating rod two can drive the gear three to rotate with the help of the connecting rod.

[0020] Compared with the prior art, the present invention has the following advantages: it reduces labor costs, can fully and efficiently dry the aluminum alloy raw materials before melting, and can disturb the raw materials during melting to avoid excessive local temperature, thereby further improving the smelting quality and efficiency;

[0021] The stirring structure in the melting chamber of the present invention is different from the traditional stirring structure in the comparative document CN 107860221 B. The present invention innovatively designs a disturbance rod and a serrated convex tooth, so that the rotary motor of the present invention can drive the disturbance rod and the serrated convex teeth in the melting chamber to move while driving the drying column in the preheating chamber to rotate. On the one hand, the disturbance rod and the serrated convex teeth move the unmelted aluminum alloy raw material, so that the aluminum alloy raw material in the melting chamber is evenly heated, preventing the alloy from being locally overheated during the melting process and affecting the smelting quality. On the other hand, it can also drive the drying column in the preheating chamber to rotate, so that the raw material falls into the conveying trough in sequence from the feed port. At the same time, the rotation of the drying column can also cause the raw material in the drying column to be evenly heated, thereby improving the drying efficiency. Compared with the simple conveying of raw materials in the comparative document, this has a higher drying efficiency.

[0022] The rotating motor can simultaneously realize the above two functions while ensuring that the heat insulation baffle is in a closed state to prevent the temperature in the preheating room from being too high and uncontrollable;

[0023] In addition, when the dried raw materials need to be fed into the melting chamber, the rotating motor 1 can also play the function of opening and closing the heat insulation baffle. At the same time, by rotating the connecting rod into or out of the gap 1 and the gap 2, the drying column can play the next function - unloading function. It can be seen that the structure of the present invention can flexibly complete the functional conversion of the drying column and improve the working efficiency of mechanical parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A top view of the external structure of the melting furnace of the present invention;

[0025] Figure 2 This is a front view of the internal structure of the hole of the present invention (the conveyor belt is not shown);

[0026] Figure 3The left side view shows the internal structure of the mesh chain conveyor belt on the hole side and the motor room (gear 2 and roller structures are not shown);

[0027] Figure 4 A front view of the melting chamber of the present invention (the conveyor belt is not shown);

[0028] Figure 5 It is a front view of the motor chamber and the preheating chamber of the present invention;

[0029] Figure 6 for Figure 2 A magnified view of point A;

[0030] Figure 7 It is a front view of the drum of the present invention;

[0031] Figure 8 The internal structure of the connecting plate and the outer skin of the present invention is shown in the right side view;

[0032] Figure 9 for Figure 8 The enlarged view of point B in FIG.

[0033] Figure 10 Schematic diagram of the external structure of the roller, gear three and rotating rod two when the connecting rod of the present invention is screwed into the second and first gaps;

[0034] Figure 11 for Figure 10 The enlarged view of point C;

[0035] Figure 12 Schematic diagram of the internal structure of the roller, gear three and rotating rod two when the connecting rod of the present invention is screwed into the notch two and notch one;

[0036] Figure 13 It is a right side view of the side of the retaining net close to the second unloading plate of the present invention;

[0037] Among them: 1. Preheating chamber; 2. Melting chamber; 3. Motorized chamber; 4. Discharge pipe; 5. Hole; 6. Insulation baffle; 7. Heating device 1; 8. Heating device 2; 9. Conveyor column; 10. Mesh chain conveyor belt; 11. Window; 12. Disturbing rod; 13. Rotating block; 14. Rotating rod 1; 15. Gear 1; 16. Roller; 17. Gear 2; 18. Fixed column; 19. Extension rod; 20. Pressure rod; 21. Pin 1; 22. Connecting rod; 23. Gear 3; 24. Rotating rod 2; 25. Notch 1; 26. Notch 2; 27. Drying column; 28. Feed port; 29. ​​Sealing door panel; 30. Fixed rod; 31. Fixed block; 32. Conveyor trough; 33. Baffle ; 34. Support rod; 35. Unloading plate one; 36. Unloading plate two; 37. Unloading hole; 38. Fracture; 39. Outer skin one; 40. Outer skin two; 41. Conveyor belt; 42. Gear four; 43. Support pin; 44. Connecting plate; 45. Rotating motor one; 46. Serrated convex teeth; 47. Horizontal rod; 48. Top groove; 49. Slide one; 50. Slider one; 51. Clamp; 52. Slider two; 53. Slide two; 54. Rotating motor two; 55. Annular track; 56. Slide three; 57. Support rod; 58. Slider three; 59. Perforation; 60. Semicircular ring; 61. Block; 62. Air pump; 63. Air outlet pipe; 64. Air inlet pipe; 65. Air outlet pipe. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0039] Example:

[0040] See attached Figure 1 To the attached Figure 5 A zero-pressure rectangular aluminum alloy melting furnace includes a furnace body, a preheating chamber 1, a melting chamber 2, and a motorized chamber 3. The motorized chamber 3 is located on the same side of the preheating chamber 1 and the melting chamber 2. The motorized chamber 3 is connected to the preheating chamber 1. A discharge pipe 4 is provided at the bottom end of the wall of the melting chamber 2. The molten liquid flows out or is extracted from the discharge pipe 4 for use in subsequent casting processes. A hole 5 is provided in the wall between the preheating chamber 1 and the melting chamber 2 (see attached diagram). Figure 2 and attached Figure 6 ), with opening 5 located on the side away from the motor chamber 3. An openable thermal insulation baffle 6 is installed within opening 5, completely shielding it from the ingress of heat into the preheating chamber 1. The bottom wall of opening 5 is tilted toward the melting chamber 2, facilitating the flow of aluminum alloy material into the melting chamber 2. A heating device 1 7 is installed within preheating chamber 1, and a heating device 2 8 is installed within melting chamber 2. The heating methods of heating devices 1 7 and 2 8 are similar to those of conventional techniques and will not be further described in this embodiment.

[0041] Conveying columns 9 are provided at the four corners of the melting chamber 2. The length direction of the conveying columns 9 is perpendicular to the feeding direction of the hole 5. The conveying columns 9 are provided with a mesh chain conveyor belt 10 that passes around the four conveying columns 9 in sequence. The rotation of the conveying columns 9 can drive the mesh chain conveyor belt 10 to rotate. The conveying columns 9 and the mesh chain conveyor belt 10 are connected by rack meshing. The transmission method is similar to the transmission principle of the chain plate bending machine of Shandong Weinuo Conveying Equipment Co., Ltd.

[0042] A window 11 is provided in an area of ​​the mesh chain conveyor belt 10 directly opposite the opening 5. A disturbance bar 12 is provided on the mesh chain conveyor belt 10 on the side of the window 11 and on the mesh chain conveyor belt 10 on the side directly opposite the window 11. The disturbance bar 12 is located on the side of the window 11 close to the motor chamber 3. The disturbance bar 12 is fixedly connected to the mesh chain conveyor belt 10 by welding. The disturbance bar 12 is tilted, with the lower end of the disturbance bar 12 facing the bottom of the melting chamber 2. The tilted disturbance bar 12 can reduce the resistance of the unmelted aluminum alloy to it. The top of the mesh chain conveyor belt 10 located between the two conveying columns 9 at the bottom end of the melting chamber 2 is provided with a serrated protrusion 46. The serrated protrusion 46 is located in the middle of the mesh chain conveyor belt 10 at this location. The serrated protrusion 46 is uneven in height and is welded to the mesh chain conveyor belt 10. When the conveying column 9 rotates forward and backward, it drives the mesh chain conveyor belt 10 to move back and forth. The disturbance rod 12 and the serrated protrusions 46 also move with the mesh chain conveyor belt 10, thereby stirring the melt and moving the unmelted aluminum alloy, so that all the aluminum alloy is heated evenly, preventing the alloy from being locally overheated during the melting process and affecting the smelting quality.

[0043] Regarding this, the present invention does not adopt the traditional stirring structure in the comparative document CN 107860221 B, but innovatively designs the disturbance rod 12 and the serrated protrusion 46, so that the melting space in the melting chamber 2 is larger and more suitable for rectangular aluminum alloy raw materials. The driving device of the present invention can drive the disturbance rod 12 and the serrated protrusion 46 to move while driving other structures to operate, thereby achieving the purpose of uniform heating.

[0044] Both ends of the conveying column 9 are equipped with rotating blocks 13 that are inserted into and rotate relative to the wall of the melting chamber 2. The rotating blocks 13 and the conveying column 9 are integrally formed. A conveying column 9 located near the preheating chamber 1 and at the bottom end of the melting chamber 2 has a rotating block 13 at its end near the motor chamber 3. The rotating block 13 extends through the wall between the melting chamber 2 and the motor chamber 3 and into the motor chamber 3. The end of the rotating block 13 extending into the motor chamber 3, away from the conveying column 9, is equipped with a rotatable rotating rod 14. The rotating block 13 is welded to the rotating rod 14. A conventional sealing gasket or sealing device is installed between the rotating block 13 and the wall to prevent the molten liquid from escaping. The end of the rotating rod 14 away from the rotating block 13 is equipped with a rotating motor 45. The rotating rod 14 is connected to the output shaft of the rotating motor 45. The rotating motor 45 is located in the motor chamber 3. The rotating motor 45 drives the rotating rod 14 to rotate, thereby rotating the conveying column 9 and moving the mesh chain conveyor belt 10.

[0045] Gear 15 is mounted around the outer periphery of rotating rod 14, passing through the center of gear 15. Rotating rod 14 and gear 15 are welded together. A horizontal cylindrical roller 16 is installed at the end of the motor chamber 3 facing the preheating chamber 1. The length of roller 16 is parallel to the length of conveying column 9. Multiple gears 2 17 are located between roller 16 and gear 15. Gear 15 meshes with an adjacent gear 2 17, and two adjacent gears 2 17 mesh with each other. The end of roller 16 near gear 2 17 meshes with an adjacent gear 2 17. A fixed column 18, connected to the wall of motor chamber 3 and rotatable relative to the wall of motor chamber 3, is located at the center of the circular surface of gear 2 17 and roller 16. The function of the fixing column 18 is to fix the gear 2 17 and the roller 16 in a certain position. The fixing column 18 is in the form of a pin, so that the gear 2 17 and the roller 16 can rotate relative to the preheating chamber 1. Figure 5 The number of the gears 2 17 in the figure is not used as a basis for limiting the number of the gears 2 17 of the device. The number of the gears 2 17 varies according to the size of the device in actual use and the sizes of other parts.

[0046] An extension rod 19 is provided on the outer wall of the end of roller 16 that extends into preheating chamber 1. The length of extension rod 19 points directly to the center of the cross section of roller 16 at that location. An arc-shaped pressure rod 20 is provided on the end of extension rod 19 away from roller 16. Pressure rod 20 and extension rod 19 are integrally manufactured, and the arc center of pressure rod 20 is located at the center of the cross section of roller 16 at that location.

[0047] A pin 21 is mounted on the outer wall of the end of roller 16 near gear 2 17, allowing it to rotate relative to roller 16. Pin 21 rotates in a fixed position on roller 16, with the extension of pin 21 passing through the center of the cross-section of roller 16 at the location of pin 21. The end of pin 21 with a smaller cross-sectional area extends beyond roller 16 and is equipped with a connecting rod 22 extending along the length of pin 21. Connecting rod 22 has a square cross-section and is welded to pin 21.

[0048] A gear three 23 is provided on the side of the roller 16 away from the gear two 17, and the circular surface of the gear three 23 faces the roller 16. A rotatable rotating rod two 24 is provided on the side of the gear three 23 away from the roller 16. There are gaps between the gear three 23 and the roller 16 and the rotating rod two 24. The length direction of the rotating rod two 24 is directly opposite to the center of the circular surface of the gear three 23.

[0049] The bottom of gear three 23 is provided with a notch 25 extending to the center of gear three 23, extending through the thickness of gear three 23. A notch 26 is provided on the end of rotating rod 24 near gear three 23, located on the same side as notch 25. When roller 16 rotates, connecting rod 22 is rotated into notch 26 and notch 1 25. The length of connecting rod 22 is aligned with the length of rotating rod 24. As rotating rod 24 rotates, due to its square cross-section, gear three 23, connected by connecting rod 22, also rotates with rotating rod 24.

[0050] Preheating chamber 1 is equipped with an inclined cylindrical drying column 27. The lower end of drying column 27 is adjacent to opening 5. A feed port 28 is located on the wall of preheating chamber 1 on the upper side of drying column 27. Feed port 28 is equipped with a sealing door 29, which opens when feeding and closes when not feeding. A fixing rod 30 is located at the center of each of the two circular surfaces of drying column 27. Each fixing rod 30 faces a fixing block 31 on the wall of preheating chamber 1. Fixing blocks 31 are welded to the wall of melting chamber 2. The fixing rod 30 is inserted into the fixing block 31 on the corresponding side and can rotate relative to the fixing block 31.

[0051] See attached Figure 7 The outer wall of the drying column 27 is provided with a plurality of conveying grooves 32 evenly spaced along the circumference of the drying column 27. The conveying grooves 32 are arranged along the length of the drying column 27, and the ends of the conveying grooves 32 pass through the ends of the drying column 27. The outer periphery of the drying column 27 is provided with a blocking net 33 that wraps the drying column 27. Both ends of the blocking net 33 are provided with support rods 34 connected to the fixed block 31. The support rods 34 are welded to the blocking net 33 and the fixed block 31. The drying column 27 can rotate relative to the blocking net 33, and the fixed rod 30 is provided through the blocking net 33.

[0052] In order to facilitate the smooth passage of the raw materials through the drying column 27 and into the melting chamber 2, the width and thickness of the raw materials are smaller than the width of the space enclosed by the conveying trough 32 and the baffle 33. Therefore, when the drying column 27 rotates and fills the conveying trough 32, the raw materials that have entered other conveying troughs 32 will shift and shake to a certain extent in the conveying trough 32 as the drying column 27 rotates, thereby better exposing other parts of the raw materials. Compared with the rigid pushing of the raw materials forward in the prior art, the surface of the raw materials in the present invention is more completely exposed during drying, and the drying efficiency is higher.

[0053] See attached Figure 1 To the attached Figure 13 An inclined discharge plate 1 35 is provided between the opening 5 and the retaining net 33, and an inclined discharge plate 2 36 is provided between the feed port 28 and the retaining net 33. The lower ends of the discharge plates 1 35 and 2 36 are both close to the side where the opening 5 is located. The discharge plates 1 35 and 2 36 are located on the same inclined surface. Discharge holes 37 are provided at the connection between the retaining net 33 and the discharge plates 1 35 and 2 36. The two discharge holes 37 are directly opposite any one of the conveying troughs 32. The discharge plate 1 35 is welded to the retaining net 33 and the opening 5, and the discharge plate 2 36 is welded to the retaining net 33 and the feed port 28. The aluminum alloy raw material slides from the feed port 28 along the unloading plate 2 36 from the unloading hole 37 on this side into the conveying trough 32 opposite to the unloading plate 2 36 , and then slides through the unloading hole 37 on the side of the unloading plate 1 35 through the unloading plate 1 35 and slides into the melting chamber 2 from the hole 5.

[0054] The end of the baffle 33 near the feed port 28 is provided with a break 38 arranged in the circumferential direction around the drying column 27, and the break 38 exposes this part of the drying column 27. The end of the break 38 near the feed port 28 is provided with an outer skin 1 39 arranged around the drying column 27, and the outer skin 1 39 is welded to the outer wall of the drying column 27. The end of the break 38 away from the feed port 28 is provided with an outer skin 2 40 arranged around the drying column 27, and the outer skin 2 40 is welded to the outer wall of the drying column 27. A conveyor belt 41 is provided on the periphery of the outer skin 2 40, and the conveyor belt 41 is connected to the outer skin 2 40 by a rack meshing method. A gear 4 42 is provided between the gear 3 23 and the drying column 27. The center of the gear 4 42 is provided with a support pin 43 connected to the inner wall of the preheating chamber 1. The structure of the support pin 43 is the same as that of an ordinary pin. The support pin 43 is welded to the gear 4 42, and the support pin 43 can rotate relative to the wall of the preheating chamber 1 along with the gear 4 42. One end of gear four 42 is engaged with gear three 23, and the other end of gear four 42 is for the conveyor belt 41 to pass around. Gear four 42 and conveyor belt 41 are connected by rack engagement.

[0055] The outer wall of outer shell 1 (39) is equipped with a plurality of connecting plates 44 evenly spaced around the circumference of drying column 27. As roller 16 rotates back and forth with rotating rod 14, extension rod 19 rotates back and forth with roller 16. When pressure rod 20 rotates with roller 16 to outer shell 1 (39), it is blocked by one of the connecting plates 44. Pressure rod 20 presses on connecting plate 44, driving drying column 27 to rotate, moving a conveying trough 32 on drying column 27 to discharge plate 1 (35) and discharge plate 2 (36). When pressure rod 20 moves away from the connecting plate 44, roller 16 stops rotating; pressure rod 20 moves back with the reverse rotation of roller 16, without driving drying column 27 back.

[0056] See attached Figure 8 and attached Figure 9 In this embodiment, the connecting plate 44 has an arcuate surface facing the outer skin 1 39. A through-hole 59 is provided on the end of the connecting plate 44 near the outer skin 1 39. A semicircular ring 60 extends through the through-hole 59 and is welded to the outer skin 1 39. The connecting plate 44 is rotatable relative to the semicircular ring 60. A stopper 61 is provided on one side of the connecting plate 44 and is connected to the outer skin 1 39. The stopper 61 is welded to the outer skin 1 39. When the drying column 27 rotates, the stopper 61 blocks the connecting plate 44, preventing it from falling in the direction of rotation, thereby facilitating the pressing rod 20 to press the connecting plate 44.

[0057] An air pump 62 is installed on the outer wall of the preheating chamber 1. The air outlet of the air pump 62 is equipped with an air outlet pipe 63 that passes through the wall of the preheating chamber 1 and extends into the preheating chamber 1. The air inlet of the air pump 62 is equipped with an air inlet pipe 64, and the side wall of the motor room 3 is equipped with an air outlet pipe 65. The air inlet pipe 64 is connected to the cooling system in the workshop. When the temperature in the preheating chamber 1 is too high, the air pump 62 can pump cold air from the cooling system in the workshop into the preheating chamber 1 and the motor room 3, and discharge the hot air in the preheating chamber 1 and the motor room 3 through the air outlet pipe 65 to control the temperature in the preheating chamber 1.

[0058] A horizontal rod 47 is installed on the mesh chain conveyor belt 10 on one side of the opening 5. The horizontal rod 47 is parallel to the conveyor column 9 and welded to the mesh chain conveyor belt 10. A vertical top groove 48 is installed on the top wall of the opening 5. The top end of the thermal insulation baffle 6 is located within the top groove 48. A vertical chute 49 is installed on the side of the top groove 48 facing the melting chamber 2. A slider 50 is installed on the top end of the thermal insulation baffle 6, which extends through the chute 49 and into the melting chamber 2. The slider 50 is integrally formed with the thermal insulation baffle 6. Two clamping blocks 51 are installed on the side of the horizontal rod 47 facing the thermal insulation baffle 6. Both clamping blocks 51 extend through the window 11 and into the chute 49. The clamping blocks 51 are arranged horizontally and welded to the horizontal rod 47. A slider 52 is installed between the two clamping blocks 51, which can move relative to the thermal insulation baffle 6 and is tightly clamped by the two clamping blocks 51. A second slide 53 is provided on the side of the heat-insulating baffle 6 facing the first slide 49 , which is arranged along the length direction of the first slide 49 and directly opposite to the first slide 49 . The end of the second slider 52 away from the clamping block 51 is located in the second slide 53 .

[0059] See attached Figure 10 To the attached Figure 12 A second rotary motor 54 is provided at the end of the second rotary rod 24 facing away from the third gear 23. The second rotary rod 24 is connected to the output shaft end of the second rotary motor 54, and the second rotary motor 54 is welded to the inner wall of the melting chamber 2. A circular track 55 is provided on the side of the second rotary motor 54 facing the third gear 23, surrounding the second rotary rod 24. The circular track 55 is welded to the second rotary motor 54. The side of the circular track 55 facing the third gear 23 is provided with a third chute 56 having a convex cross-section. The side of the third gear 23 facing the second rotary motor 54 is provided with a support rod 57 extending toward the third chute 56. The end of the support rod 57 near the third chute 56 is provided with a slider 58 located within and slidable along the third chute 56. The slider 58 is convex in shape, and the support rod 57 and the slider 58 are integrally manufactured. The support rod 57 is welded to the third gear 23.

[0060] The operating principle of this embodiment is as follows: when feeding in the feed port 28, the sealing door panel 29 is opened, and at this time, the rotating motor 145 drives the rotating rod 14 to rotate back and forth. On the one hand, the rotating rod 14 drives the conveying column 9 to rotate back and forth, thereby driving the mesh chain conveyor belt 10 to move back and forth, and the disturbance rod 12 and the serrated protrusions 46 stir the molten metal and move the unmelted raw materials so that they are heated evenly; at this time, since the thermal insulation baffle 6 cannot be opened, when the mesh chain conveyor belt 10 moves back and forth, the horizontal rod 47 drives the clamping block 51 to move up and down, thereby driving the slider 2 52 to move back and forth along the chute 2 53. At this time, the amplitude of the up and down movement of the clamping block 51 will not lift the slider 1 50, thereby not lifting the thermal insulation baffle 6; so at this time, the mesh chain conveyor belt 10 moves back and forth, driving the disturbance rod 12 and the serrated protrusions 46 to disturb the unmelted aluminum alloy raw materials, so that the aluminum alloy raw materials are heated evenly, thereby improving the smelting quality;

[0061] On the other hand, when the rotating rod 14 drives the gear 2 17 to rotate forward and reverse, it also drives the roller 16 to rotate back and forth. At this time, the pressure rod 20 is located near the connecting plate 44, and the connecting rod 22 is located away from the gap 1 25 and the gap 2 26. At this time, the amplitude of the back-and-forth rotation of the rotating rod 14 cannot rotate the connecting rod 22 into the gap 1 25 and the gap 2 26. Therefore, the gear 3 23 will not rotate with the rotation of the roller 16. The rotating motor 2 54 is also in the off state. Therefore, the conveying belt 41 will not drive the drying column 27 to rotate. In the above situation, the pressure rod 20 rotates back and forth with the roller 16. Each time the pressure rod 20 is blocked by the connecting plate 44 at the same height, the pressure rod 20 continues to rotate with the roller 16, thereby pressing the connecting plate 44 blocked by the stopper 61 below the connecting plate 44 downward, thereby driving the drying column 27 to rotate. When the drying column 27 rotates, the conveyor belt 41 drives the gear three 23 and the gear four 42 to rotate meaninglessly. When the pressure rod 20 leaves the connecting plate 44, the drying column 27 no longer rotates. In the above process, the drying column 27 rotates before and after the rotation of the connecting plate 44. The rectangular aluminum alloy raw material entering from the feed port 28 is loaded into the conveying trough 32 opposite to the discharge hole 37. The pressing rod 20 presses the drying column 27 to rotate once, and the next empty conveying trough 32 is rotated to a position opposite to the discharge hole 37, so that the raw material can continue to enter the next conveying trough 32, thereby filling each conveying trough 32 with raw material. In this process, the drying column 27 rotates, and the baffle 33 blocks the raw material to prevent it from falling, and makes each raw material fully exposed in the preheating chamber 1, so as to achieve better drying effect. The second connecting plate 44 will move back with the roller 16. At this time, the pressure plate will be blocked by the next connecting plate 44 that has rotated to the position before the previous connecting plate 44. Since the connecting plate 44 and the outer skin 39 are movably connected through the through-hole 59 and the semicircular ring 60, the pressure rod 20 will push the connecting plate 44 upward, thereby allowing the pressure rod 20 to pass. After the pressure rod 20 passes, the connecting plate 44 will fall downward to the top of the stopper 61 due to the action of gravity, making it easier for the pressure rod 20 to press the connecting plate 44 when it rotates back again.

[0062] After the above operation, the conveying trough 32 in the drying column 27 is filled with raw materials. At this time, the feed port 28 is closed, and the rotating motor 1 45 drives the rotating rod 14 to rotate continuously in one direction, so that the clamping block 51 continues to move upward. After the slider 2 52 moves to the top of the slide 2 53, the clamping block 51 presses against the slider 1 50. As the clamping block 51 continues to move upward, the clamping block 51 presses against the slider 1 50 and moves upward along the top groove 48 with the insulation baffle 6. When the insulation baffle 6 moves to the top, the rotating motor 1 45 stops running and the hole 5 is opened. At the same time, during the above operation, the rotating motor 1 45 drives the roller 16 to rotate through the gear 2 17, and rotates the connecting rod 22 into the gap 1 25 and the gap 2 26 (see attached). Figure 5 , Attachment Figure 10and attached Figure 11 ), at this time, the pressure rod 20 rotates to a position away from the connecting plate 44; then the raw materials in the conveying trough 32 of the drying column 27 opposite the discharge hole 37 slide into the melting chamber 2 through the hole 5 and the window 11, and the rotating motor 2 54 and the air pump 62 are turned on. The air pump 62 pumps cold air into the preheating chamber 1 and the motor chamber 3 to prevent the temperature in the preheating chamber 1 from being too high due to the opening of the hole 5; then the rotating motor 2 54 drives the rotating rod 24 to rotate, thereby driving the gear 3 23 and the gear 4 42 to rotate, and the conveying belt 41 drives the drying column 27 to rotate, and the raw materials in the conveying trough 32 of the drying column 27 are sequentially delivered into the melting chamber 2 through the discharge hole 37;

[0063] After the conveying trough 32 of the drying column 27 is completely emptied, the second rotary motor 54 stops running, and the first rotary motor 45 starts running, driving the clamping block 51 to move the heat-insulating baffle 6 downward to seal the hole 5, and at the same time, the connecting rod 22 is rotated away from the first gap 25 and the second gap 26; the air pump 62 is turned off, and the above operation is repeated;

[0064] During the above operation, the first aluminum alloy raw material that enters will slide from the conveying trough 32 through the discharge hole 37 to the discharge plate 1 35, so the length of the first aluminum alloy raw material that enters needs to be able to block the discharge plate 1 35 and the discharge hole 37 on that side, but will not hinder the rotation of the drying column 27, thereby preventing a part of the raw material that enters later from sliding out of the discharge hole 37 on that side and hindering the rotation of the drying column 27.

[0065] The above are embodiments of the present invention. The above embodiments and the specific parameters therein are only for the purpose of clearly describing the invention verification process and are not intended to limit the scope of patent protection of the present invention. The scope of patent protection of the present invention shall still be subject to the claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A zero-pressure rectangular aluminum alloy melting furnace, characterized in that: The invention comprises a furnace body, wherein a preheating chamber (1), a melting chamber (2) and a maneuvering chamber (3) are provided in the furnace body, wherein the maneuvering chamber (3) is communicated with the preheating chamber (1), and the melting chamber (2) is provided with a discharge pipe (4); a hole (5) is provided between the preheating chamber (1) and the melting chamber (2), wherein an openable heat-insulating baffle (6) is provided in the hole (5), and the bottom wall of the hole (5) is inclined toward the side where the melting chamber (2) is located; a heating device (7) is provided in the preheating chamber (1), and a heating device (8) is provided in the melting chamber (2); The melting chamber (2) is provided with a stirring assembly, and the motorized chamber (3) is provided with a rotating rod (14) that can drive the stirring assembly to stir the melt; the motorized chamber (3) is provided with a cylindrical roller (16) that is horizontally arranged and extends into the preheating chamber (1) at one end thereof facing the preheating chamber (1), the rotating rod (14) can drive the roller (16) to rotate, and a pressing assembly is provided on the outer side wall of the end of the roller (16) extending into the preheating chamber (1); the roller (16) is provided with a gear (23) on the side away from the motorized chamber (3), the circular surface of the gear (23) faces the roller (16), and the gear (23) is provided with a rotatable rotating rod (24) on the side away from the roller (16), the length direction of the rotating rod (24) is opposite to the center of the circular surface of the gear (23); the gear (23) can rotate with the roller (16) or the rotating rod (24); A cylindrical drying column (27) is provided in the preheating chamber (1) and is tilted and rotatable. The lower end of the drying column (27) is close to the hole (5). A feed port (28) is provided on the wall of the preheating chamber (1) on the upper end side of the drying column (27). The feed port (28) is provided with a sealing door panel (29). The outer wall of the drying column (27) is provided with a plurality of conveying grooves (32) uniformly arranged along the circumferential direction of the drying column (27), the conveying grooves (32) are arranged along the length direction of the drying column (27), and the two ends of the conveying grooves (32) pass through the two ends of the drying column (27); the outer periphery of the drying column (27) is provided with a blocking net (33) that wraps the drying column (27), and the drying column (27) can rotate relative to the blocking net (33). The hole (5 ) is provided with an inclined discharge plate 1 (35) between the said feeding port (28) and the said blocking net (33), and an inclined discharge plate 2 (36) is provided between the said feeding port (28) and the said blocking net (33), and the said discharge plate 1 (35) and the said discharge plate 2 (36) are located on the same inclined surface, and discharge holes (37) are provided at the connection between the said blocking net (33) and the said discharge plate 1 (35) and the said discharge plate 2 (36), and the two said discharge holes (37) are directly opposite to any one of the conveying troughs (32); The end of the blocking net (33) close to the feed port (28) is provided with a fracture (38) arranged in the circumferential direction around the drying column (27), the end of the fracture (38) close to the feed port (28) is provided with a first outer skin (39) arranged around the drying column (27), the end of the fracture (38) away from the feed port (28) is provided with a second outer skin (40) arranged around the drying column (27), the outer periphery of the second outer skin (40) is provided with a conveying belt (41), the conveying belt (41) is connected to the second outer skin (40) by means of a rack meshing, and the gear three ( A gear four (42) is provided between the outer skin one (39) and the drying column (27), a support pin (43) connected to the inner wall of the preheating chamber (1) is provided at the center of the gear four (42), one end of the gear four (42) is meshed with the gear three (23), and the other end of the gear four (42) is for the conveying belt (41) to pass around, and the gear four (42) and the conveying belt (41) are connected by a rack meshing manner; a connecting assembly is provided on the outer wall of the outer skin one (39), and the pressure rod (20) drives the drying column (27) to rotate by pressing the connecting assembly.

2. A zero-pressure rectangular aluminum alloy melting furnace according to claim 1, characterized in that: The end of the rotating rod (14) away from the rotating block (13) is provided with a rotating motor (45), and the rotating rod (14) is connected to the output shaft end of the rotating motor (45); the conveying assembly includes conveying columns (9) arranged at four corners of the melting chamber (2), the length direction of the conveying columns (9) is perpendicular to the feeding direction of the hole (5), the conveying columns (9) are provided with a mesh chain conveyor belt (10) that passes through the four conveying columns (9) in sequence, the rotation of the conveying columns (9) can drive the mesh chain conveyor belt (10) to rotate, the mesh chain conveyor belt (10) is provided with a window (11) in an area facing the hole (5), and the mesh chain conveyor belt (10) on the side of the window (11) and the mesh chain conveyor belt (10) on the side facing the window (11) are both provided with a disturbance rod (12), The disturbance rod (12) is arranged on a side of the window (11) close to the motorized chamber (3); both ends of the conveying column (9) are provided with a rotating block (13) which is inserted into the wall of the melting chamber (2) and can rotate relative to the wall of the melting chamber (2); a conveying column (9) close to the preheating chamber (1) and located at the bottom end of the melting chamber (2) has a rotating block (13) at one end close to the motorized chamber (3) passing through the wall between the melting chamber (2) and the motorized chamber (3) and extending into the motorized chamber (3); the end of the rotating block (13) extending into the motorized chamber (3) away from the conveying column (9) is connected to a rotating rod (14); the conveying column (9) is connected to the mesh chain conveyor belt (10) by means of a rack meshing; the disturbance rod (12) is arranged obliquely, and the lower end of the disturbance rod (12) faces the bottom of the melting chamber (2).

3. The zero-pressure rectangular aluminum alloy melting furnace according to claim 1, characterized in that: The pressing assembly includes an extension rod (19) arranged on the outer wall of the roller (16), and an arc-shaped pressure rod (20) is provided at the end of the extension rod (19) away from the roller (16), and the arc center of the pressure rod (20) is located at the central axis of the roller (16); the outer wall of the roller (16) at the end close to the motor chamber (3) is provided with a pin (21) that can rotate relative to the roller (16), and the extension line of the length of the pin (21) passes through the central axis of the roller (16); the end of the pin (21) with a smaller cross-sectional area extends out of the roller (16) and is provided with a connecting rod (22) arranged along the length direction of the pin (21), and the cross-section of the connecting rod (22) is square; the connecting rod (22) can rotate with the roller (16) to a position where the gear three (23) and the rotating rod two (24) are connected together, and at this time, the rotating rod two (24) can drive the gear three (23) to rotate.

4. The zero-pressure rectangular aluminum alloy melting furnace according to claim 2, characterized in that: The top of the mesh chain conveyor belt (10) between the two conveying columns (9) at the bottom end of the melting chamber (2) is provided with a sawtooth convex tooth (46) in the middle of the mesh chain conveyor belt (10) there, and the sawtooth convex tooth (46) is uneven in height.

5. The zero-pressure rectangular aluminum alloy melting furnace according to claim 2, characterized in that: A horizontal rod (47) is provided at the mesh chain conveyor belt (10) on one side of the hole (5), and the horizontal rod (47) is parallel to the conveying column (9). A vertical top groove (48) is provided on the top wall of the hole (5), and the top end of the thermal insulation baffle (6) is located in the top groove (48). A vertical chute (49) is provided on the side of the top groove (48) facing the melting chamber (2). The top end of the thermal insulation baffle (6) faces the melting chamber (2). A slider (50) is provided on one side of the horizontal rod (47) and extends into the melting chamber (2) after passing through the chute (49); two clamping blocks (51) are provided on the side of the horizontal rod (47) facing the heat-insulating baffle (6), both of which pass through the window (11) and extend into the chute (49). The clamping blocks (51) are arranged horizontally, and a slider (52) is provided between the two clamping blocks (51) and can move relative to the heat-insulating baffle (6). The slider (52) is tightly clamped by the two clamping blocks (51).

6. The zero-pressure rectangular aluminum alloy melting furnace according to claim 5, characterized in that: The side of the heat-insulating baffle (6) facing the slide groove (49) is provided with a slide groove (53) arranged along the length direction of the slide groove (49) and facing the slide groove (49), and the end of the slider (52) away from the clamping block (51) is located in the slide groove (53).

7. The zero-pressure rectangular aluminum alloy melting furnace according to claim 3, characterized in that: The outer periphery of the rotating rod 1 (14) is provided with a gear 1 (15) arranged around the rotating rod 1 (14), and a plurality of gear 2s (17) are provided between the roller (16) and the gear 1 (15), the gear 1 (15) is meshed with a gear 2 (17) adjacent to it, and the two adjacent gear 2s (17) are meshed with each other, and one end of the roller (16) close to the gear 2 (17) is meshed with an adjacent gear 2 (17), and the centers of the circular surfaces of the gear 2 (17) and the roller (16) are provided with a fixed column (18) connected to the wall of the motor room (3) and rotatable relative to the wall of the motor room (3); the rotating rod 2 (24) is away from the one end of the gear 3 (23) A rotating motor 2 (54) is provided at the end, and the rotating motor 2 (54) is connected to the inner wall of the melting chamber (2). The rotating motor 2 (54) is provided with an annular track (55) arranged around the rotating rod 2 (24) on the side facing the gear 3 (23). The annular track (55) is provided with a chute 3 (56) with a convex cross-section on the side facing the gear 3 (23). The gear 3 (23) is provided with a support rod (57) extending toward the chute 3 (56) on the side facing the rotating motor 2 (54). The support rod (57) is provided with a slider 3 (58) located in the chute 3 (56) and capable of sliding along the chute 3 (56) at one end close to the chute 3 (56). The slider 3 (58) is convex.

8. The zero-pressure rectangular aluminum alloy melting furnace according to claim 1, characterized in that: The connecting assembly includes a plurality of connecting plates (44) uniformly arranged in the circumferential direction around the drying column (27); when the pressure rod (20) rotates to the outer skin (39) along with the roller (16), the pressure rod (20) will be blocked by one of the connecting plates (44); the pressure rod (20) presses the connecting plate (44) to drive the drying column (27) to rotate; when the pressure rod (20) moves away from the connecting plate (44), it can move back along with the reversal of the roller (16) without driving the drying column (27) to rotate back; the side of the connecting plate (44) facing the outer skin (39) is an arc surface; the end of the connecting plate (44) close to the outer skin (39) is provided with a through hole (59); the through hole (59) is provided with a semicircular ring (60) passing through the through hole (59); the semicircular ring (60) is connected to the outer skin A (39) is welded, and a stopper (61) connected to the outer skin (39) is provided on one side of the connecting plate (44). When the drying column (27) rotates, the stopper (61) can block the connecting plate (44) so ​​that the connecting plate (44) will not fall in the rotation direction of the drying column (27), so that the pressure rod (20) can press the connecting plate (44); a fixing rod (30) is provided at the center of the two circular surfaces of the drying column (27), and a fixing block (31) is provided on the wall of the preheating chamber (1) facing each fixing rod (30). The fixing rod (30) is inserted into the fixing block (31) on the corresponding side and can rotate relative to the fixing block (31); a support rod (34) connected to the fixing block (31) is provided at both ends of the blocking net (33), and the fixing rod (30) is set through the blocking net (33).

9. The zero-pressure rectangular aluminum alloy melting furnace according to claim 1, characterized in that: An air pump (62) is provided on the outer wall of the preheating chamber (1); an air outlet of the air pump (62) is provided with an air outlet pipe (63) passing through the wall of the preheating chamber (1); an air inlet of the air pump (62) is provided with an air inlet pipe (64); and an air outlet pipe (65) is provided on the side wall of the motor room (3).

10. The zero-pressure rectangular aluminum alloy melting furnace according to claim 3, characterized in that: The bottom of the gear three (23) is provided with a notch one (25) extending to the center of the gear three (23), and the notch one (25) passes through the thickness direction of the gear three (23). The end of the rotating rod two (24) close to the gear three (23) is provided with a notch two (26), and the notch two (26) and the notch one (25) are located on the same side. When the roller (16) rotates, the connecting rod (22) can be rotated into the notch two (26) and the notch one (25). At this time, the length direction of the connecting rod (22) is set along the length direction of the rotating rod two (24). At this time, the rotating rod two (24) can drive the gear three (23) to rotate with the help of the connecting rod (22).

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