An automated powder feeding equipment for silicon carbide micro powder production

Abstract

The present invention relates to the technical field of silicon carbide micropowder production, and in particular to an automated powder feeding device for silicon carbide micropowder production, comprising a base, wherein the upper end surface of the base is fixedly connected to two vertical frames arranged symmetrically in front and back, and the upper end surface of the base is also fixedly connected to a support seat located in front of the two vertical frames, and a conveying cylinder is arranged at the upper end of the support seat, a lower hopper is installed at the upper front side of the conveying cylinder, and a discharge port is installed at the lower rear side of the conveying cylinder. The sorting and conveying mechanism and the secondary screening mechanism adopted by the present invention are used in combination to automatically complete the secondary sorting and conveying of silicon carbide micropowder. The overall structure is completed by single power, and primary screening is carried out by spiral screening and conveying, and then the material is screened multiple times from top to bottom. During this period, reciprocating shaking is used to increase the collision force and multiple collisions from top to bottom are used to achieve efficient continuous screening of the same material, effectively ensuring the sorting efficiency and sorting effect of silicon carbide micropowder.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide micropowder production, and in particular to an automatic powder feeding device for silicon carbide micropowder production. Background Art

[0002] Silicon carbide powder is a high-performance inorganic non-metallic material with the advantages of high hardness, high thermal conductivity, high temperature resistance, low density, high dielectric strength and good chemical stability. It is widely used in abrasive materials, ceramic materials, semiconductor materials, coating materials, new energy, biomedicine, aerospace and other fields.

[0003] Silicon carbide powder is mainly prepared from high-purity silicon carbide blocks or particles through steps such as crushing, grinding, sorting, cleaning and drying. Silicon carbide powder needs to be sorted and fed during grinding.

[0004] At present, the sorting and powder delivery processes of silicon carbide micropowder are separate operations. It is necessary to use sorting equipment for sorting and then transfer it to the powder delivery equipment for processing. The overall work efficiency needs to be improved. In addition, the sorting adopts a conventional screening machine, which basically only screens the silicon carbide micropowder once, and it is difficult to ensure the screening quality of silicon carbide micropowder. There will be a lot of fine powder mixed in the coarse slag, which will reduce the powder output of silicon carbide micropowder. At the same time, the particles of silicon carbide micropowder are prone to static electricity during the processing process. When they rub against each other, the static electricity can make the particles attract each other, thus forming agglomerates. These agglomerates will affect the screening of silicon carbide micropowder and further affect the powder output. Summary of the invention

[0005] Technical problem to be solved: The present invention provides an automated powder feeding device for producing silicon carbide micropowder, which can solve the above-mentioned problems.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an automated powder feeding equipment for the production of silicon carbide micropowder, including a base, including a base, the upper end surface of the base is fixedly connected to two vertical frames arranged symmetrically front and back, the upper end surface of the base is also fixedly connected to a support seat located in front of the two vertical frames, a conveying cylinder is arranged on the upper end of the support seat, a lower hopper is installed on the upper front side of the conveying cylinder, a discharge port is installed on the lower rear side of the conveying cylinder, a sorting and conveying mechanism for screening and conveying silicon carbide micropowder is arranged in the conveying cylinder, a sorting tank is arranged between the front and rear vertical frames, a feed port is arranged on the upper end of the sorting tank, a bottom pocket is fixedly connected to the lower end of the sorting tank in an integrated manner, the feed port and the discharge port are connected by an elastic connecting hose, and a secondary screening mechanism for secondary screening of silicon carbide micropowder is commonly provided inside and outside the sorting tank.

[0007] The sorting and conveying mechanism includes a spiral push shaft rotatably connected in the conveying cylinder, the rear end of the spiral push shaft extends to the outside of the conveying cylinder and is fixedly connected to the output end of the motor, the motor is fixedly connected to the outside of the conveying cylinder, a mounting opening is provided at the lower front part of the conveying cylinder, a mesh screen is installed in the mounting opening, a plurality of mesh holes are provided on the mesh screen, and a pushing component for centrally pushing out the screened silicon carbide micropowder is provided outside the mesh screen.

[0008] The secondary screening mechanism includes two support frames which are respectively fixedly connected to the bottom pocket and the inner wall of the sorting tank. The centers of the upper and lower support frames are connected to a central rotating pipe for rotation. The upper end and the middle position of the central rotating pipe are connected to a cone connected thereto. The central rotating pipe is connected to the tip of the cone. The upper cone is distributed below the feed port. An inverted frustum is arranged between the upper and lower cones. The frustum is rotatably installed inside the sorting tank. The upper and lower ends of the frustum are connected and an annular screen with an inverted frustum in cross section is arranged inside the frustum. The central rotating pipe vertically passes through the middle of the frustum. The edge of the lower end of the frustum is connected to It is connected to a number of connecting pipes, the lower ends of which pass through the lower cone, and the upper cone walls of the cones on the upper and lower sides and the side walls of the ring screen are provided with a number of sieve holes 2. A cone bucket is fixedly connected to the upper side of the bottom pocket, and the bottom wall of the bottom pocket is connected to a feed pipe 1 and a feed pipe 2 which are connected to it and distributed front and back. The upper end of the feed pipe 2 extends into the sorting tank and is fixedly connected to an adapter seat, which is rotatably connected to the center rotating pipe. A shaking assembly for controlling its forward and backward reciprocating movement is arranged on the outside of the sorting tank, and a rotating assembly for controlling the rotation of the center rotating pipe is arranged between the center rotating pipe and the sorting tank.

[0009] As a preferred technical solution of the present invention, the ejection assembly includes an outer shell fixedly connected to the outside of the conveying cylinder and corresponding to the mesh screen, and a discharge pipe three connected to the interior of the outer shell is symmetrically installed on the front and rear sides of the lower side of the outer shell, a reciprocating screw is rotatably connected between the front and rear walls of the outer shell and a guide rod is fixedly connected, the front end of the reciprocating screw extends to the outside of the outer shell and is connected to the spiral push shaft through a synchronous belt, a movable plate is slidably connected to the guide rod, and the movable plate is also threadedly connected to the reciprocating screw.

[0010] As a preferred technical solution of the present invention, the outer ring surface of the spiral push shaft is fixedly connected to a plurality of scrapers via support rods at positions corresponding to the mesh screen, and a brush is installed on one side of the scraper away from the axis of the spiral push shaft.

[0011] As a preferred technical scheme of the present invention, the shaking assembly includes a mounting plate symmetrically fixedly connected to the middle part of the front side of the sorting tank, a rotating shaft is rotatably connected between the upper and lower mounting plates, a plurality of cams are fixedly connected to the rotating shaft, and a roller is rotatably connected to the position corresponding to each cam on the side of the front side frame close to the sorting tank, and the cam and the roller are in rolling contact with each other in a one-to-one manner, and a plurality of support rods 2 distributed equidistantly above and below are slidably connected to the front side frame, one end of each support rod 2 is fixedly connected to a limiting head 1, and the other end is fixedly connected to the sorting tank, a spring 2 is sleeved on a section of each support rod 2 between the limiting head 1 and the front side frame, a support rod 1 corresponding to the support rod 2 is slidably connected to the rear side frame, one end of each support rod 1 is fixedly connected to the limiting head 2, and the other end is fixedly connected to the sorting tank, each support rod 1 is fixedly connected to a back plate located between the sorting tank and the rear side frame, and a spring 1 is sleeved on a section of each support rod 1 between the back plate and the rear side frame.

[0012] As a preferred technical solution of the present invention, the rotational connection assembly includes a bevel gear four fixedly connected to the upper outer wall of the central rotating tube, the periphery of the bevel gear four is meshingly connected with the bevel gear three, the center of the bevel gear three is fixedly connected with a rotating rod, the rotating rod rotates through the side wall of the sorting tank and is fixedly connected with the bevel gear one, the periphery of the bevel gear one is meshingly connected with the bevel gear two, and the bevel gear two is fixedly connected to the rotating shaft.

[0013] As a preferred technical solution of the present invention, a linkage component for controlling the synchronous operation of the shaking component and the rotational connection component is arranged between the sorting tank and the outer shell, the linkage component includes a bevel gear five fixedly connected to the upper end of the rotating shaft, the periphery of the bevel gear five is meshingly connected with a bevel gear six, the center of the bevel gear six is ​​fixedly connected to the pin rod, the pin rod is rotatably connected to the bracket, the bracket is fixedly connected to the top of the sorting tank, the end of the pin rod away from the bevel gear six is ​​fixedly connected to the connecting gear, the upper side of the connecting gear is meshingly connected with a tooth column, the front end of the tooth column is fixedly connected to the rear end of the reciprocating screw, and the rear end is rotatably connected to the bottom of the conveying cylinder through a support block.

[0014] As a preferred technical solution of the present invention, the lower outer wall of the central rotating tube is fixedly connected with an inverted L-shaped connecting frame, the horizontal section of the connecting frame is located between the lower support frame and the adapter seat, the lower end of the vertical section of the connecting frame is fixedly connected with scraper 2, and a number of brushes are also arranged at the lower end of scraper 2.

[0015] As a preferred technical solution of the present invention, the calibers of the sieve hole 1 and the sieve hole 2 are the same.

[0016] As a preferred technical solution of the present invention, a baffle cover is fixedly connected to the lower side of the upper support frame through a support plate, bevel gear four and bevel gear three are distributed in the baffle cover, and a hole for the rotating rod to pass through is opened on the side wall of the baffle cover corresponding to the position of the rotating rod, and the baffle cover is rotatably connected to the central rotating tube.

[0017] Beneficial effects: 1. The sorting and conveying mechanism adopted in the present invention improves the conventional spiral conveying tube, and performs a primary screening on the silicon carbide micropowder while conveying it, and utilizes the conveying power for screening. During the screening, the mesh screen can be further scraped to effectively avoid the blockage of the mesh holes, and the silicon carbide micropowder screened in the first stage can be automatically discharged. The overall structure is simple and the functional effect is remarkable.

[0018] 2. The secondary screening mechanism adopted in the present invention can effectively increase the collision force of silicon carbide micropowder by shaking and rotating, which can not only break up the agglomerated silicon carbide micropowder to ensure the sorting quality of silicon carbide micropowder, but also further sort the silicon carbide micropowder, and is convenient and quick to use.

[0019] 3. The linkage assembly adopted in the present invention can complete multiple functions through a single power, and each function is completed synchronously. The overall structure is simple and the use is energy-saving and environmentally friendly.

[0020] 4. The sorting and conveying mechanism and the secondary screening mechanism adopted in the present invention are used in combination to automatically complete the secondary sorting and conveying of silicon carbide micropowder. The overall structure is completed by a single power, and primary screening is carried out through spiral screening and conveying. Then the material is screened multiple times from top to bottom. During this period, reciprocating shaking is used to increase the collision force and multiple collisions from top to bottom are used to achieve efficient continuous screening of the same material, effectively ensuring the sorting efficiency and sorting effect of silicon carbide micropowder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 It is a front view cross-sectional structural schematic diagram of the conveying tube of the present invention.

[0024] Figure 3 It is a front sectional structural schematic diagram of the conveying tube of the present invention.

[0025] Figure 4 The present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0026] Figure 5 It is a schematic diagram of the front cross-sectional structure of the separation tank of the present invention.

[0027] Figure 6 The present invention Figure 5 Schematic diagram of the enlarged structure of area B in the middle.

[0028] In the figure: 1. base; 2. sorting tank; 21. feed port; 22. bottom bag; 23. feed pipe 1; 231. connecting frame; 232. scraper 2; 24. feed pipe 2; 3. stand; 4. elastic connecting hose; 5. conveying cylinder; 51. feed hopper; 52. support seat; 53. discharge port; 6. sorting and conveying mechanism; 61. screw push shaft; 62. scraper 1; 63. mesh screen; 631. sieve hole 1; 64. push-out assembly; 641. moving plate; 644. reciprocating screw; 645. guide rod; 646. outer shell; 65. motor; 66. feed pipe 3; 7. secondary screening mechanism; 71. cone; 72. screw-on assembly; 7 21. Block cover; 722. Bevel gear one; 723. Bevel gear two; 724. Rotating rod; 725. Bevel gear three; 726. Bevel gear four; 73. Support frame; 74. Cone body; 741. Connecting pipe; 75. Center rotating pipe; 76. Shaking assembly; 761. Support rod one; 762. Spring one; 763. Cam; 764. Roller; 765. Rotating shaft; 766. Spring two; 767. Support rod two; 768. Mounting plate; 77. Cone bucket; 78. Linkage assembly; 781. Bevel gear five; 782. Bevel gear six; 783. Pin rod; 784. Connecting gear; 785. Bracket; 786. Gear column; 79. Adapter. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0030] See also Figure 1 , Figure 2 and Figure 5 , an automated powder feeding device for producing silicon carbide micropowder, comprising a base 1, wherein the upper end surface of the base 1 is fixedly connected to two front and rear symmetrically arranged upright frames 3, the upper end surface of the base 1 is also fixedly connected to a support seat 52 located in front of the two upright frames 3, a conveying cylinder 5 is arranged at the upper end of the support seat 52, a lower hopper 51 is installed at the upper front side of the conveying cylinder 5, a discharge port 53 is installed at the lower rear side of the conveying cylinder 5, a sorting and conveying mechanism 6 for screening and conveying silicon carbide micropowder is arranged in the conveying cylinder 5, a sorting tank 2 is arranged between the front and rear upright frames 3, a feed port 21 is arranged at the upper end of the sorting tank 2, a bottom pocket 22 is fixedly connected to the lower end of the sorting tank 2, the feed port 21 and the discharge port 53 are connected by an elastic connecting hose 4, and a secondary screening mechanism 7 for secondary screening of silicon carbide micropowder is commonly arranged inside and outside the sorting tank 2.

[0031] See also Figure 2 , Figure 3 and Figure 4The sorting and conveying mechanism 6 includes a spiral pushing shaft 61 rotatably connected to the conveying cylinder 5, the rear end of the spiral pushing shaft 61 extends to the outside of the conveying cylinder 5 and is fixedly connected to the output end of the motor 65, the motor 65 is fixedly connected to the outside of the conveying cylinder 5, and the conveying cylinder 5 is provided with a mounting opening at the lower front side, a mesh screen 63 is installed in the mounting opening, a plurality of sieve holes 631 are provided on the mesh screen 63, and a pushing component 64 for centrally pushing out the sieved silicon carbide micropowder is arranged outside the mesh screen 63.

[0032] During specific operation, the silicon carbide powder is input into the conveying cylinder 5 through the lower hopper 51, and the spiral pushing shaft 61 is controlled to rotate by the motor 65, and the spiral pushing shaft 61 pushes the silicon carbide powder, and the conveying silicon carbide powder is sorted through the mesh screen 63.

[0033] See also Figure 1 , Figure 5 and Figure 6 The secondary screening mechanism 7 includes two support frames 73 respectively fixedly connected to the bottom pocket 22 and the inner wall of the sorting tank 2. The centers of the upper and lower support frames 73 are rotatably connected with a central rotating pipe 75. The upper end and the middle position of the central rotating pipe 75 are connected with a cone 71 connected thereto. The central rotating pipe 75 is connected to the tip position of the cone 71. The upper cone 71 is distributed below the feed port 21. An inverted frustum 74 is arranged between the upper and lower cones 71. The frustum 74 is rotatably installed inside the sorting tank 2. The upper and lower ends of the frustum 74 are through-arranged and an annular screen with an inverted frustum shaped vertical cross section is arranged inside. The central rotating pipe 75 vertically passes through the middle of the frustum 74. The lower edge of the frustum 74 is connected to the It is connected to a plurality of connecting pipes 741 which are connected thereto, the lower ends of the connecting pipes 741 pass through the lower cone 71, the upper cone walls of the cones 71 on the upper and lower sides and the side walls of the annular screen are provided with a plurality of sieve holes 2, a cone bucket 77 is fixedly connected to the upper side of the bottom pocket 22, a feed pipe 1 23 and a feed pipe 2 24 which are connected thereto and distributed front and back are connected to the bottom wall of the bottom pocket 22, the upper end of the feed pipe 2 24 extends into the sorting tank 2 and is fixedly connected to an adapter seat 79, the adapter seat 79 is rotatably connected to the center rotating pipe 75, a shaking assembly 76 for controlling its forward and backward reciprocating movement is arranged on the outside of the sorting tank 2, a rotating assembly 72 for controlling the rotation of the center rotating pipe 75 is arranged between the center rotating pipe 75 and the sorting tank 2.

[0034] The silicon carbide powder transported by the sorting and conveying mechanism 6 is input into the sorting tank 2 through the feed port 21. Under the action of gravity, the silicon carbide powder automatically falls. First, the silicon carbide powder is sorted by the sieve hole 2 on the upper cone 71. Then, the silicon carbide powder sorted by the sieve hole 2 on the upper cone 71 directly enters the discharge pipe 2 24 through the central transfer pipe 75. The unsorted silicon carbide powder falls into the truncated cone 74. A part of the silicon carbide powder falling into the truncated cone 74 is sorted again through the sieve hole 2 on the side wall of the ring screen, and a part falls from the middle of the ring screen to the lower cone 71 for sorting. Finally, the unsorted silicon carbide powder is concentratedly transported to the bottom pocket 22 through the cone bucket 77. The silicon carbide powder does not fall straight in the sorting tank 2. With the cooperation of the upper and lower cones 71, the truncated cone 74, and the ring screen, the movement trajectory of the silicon carbide powder is lengthened and it undergoes multiple collision screenings. The cooperation of the sorting and conveying mechanism 6 and the secondary screening mechanism 7 can complete the secondary multiple sorting of silicon carbide powder.

[0035] See also Figure 2 and Figure 4 The ejection assembly 64 includes an outer shell 646 fixedly connected to the outside of the conveying cylinder 5 and corresponding to the mesh screen 63. A discharge pipe 66 connected to the interior of the outer shell 646 is symmetrically installed on the front and rear sides of the lower side of the outer shell 646. A reciprocating screw 644 is rotatably connected between the front and rear walls of the outer shell 646 and is fixedly connected to a guide rod 645. The front end of the reciprocating screw 644 extends to the outside of the outer shell 646 and is connected to the spiral push shaft 61 through a synchronous belt. A movable plate 641 is slidably connected to the guide rod 645, and the movable plate 641 is also threadedly connected to the reciprocating screw 644.

[0036] During specific operation, the spiral push shaft 61 rotates, driving the synchronous belt to control the reciprocating screw 644 to rotate and control the movable plate 641 to move back and forth along the guide rod 645 in the outer shell 646. When the movable plate 641 moves forward, the silicon carbide micropowder is pushed forward, and a large amount of screened silicon carbide micropowder is directly discharged through the discharge pipe three 66 on the front side. When the movable plate 641 moves backward, the silicon carbide micropowder that falls during the forward movement of the movable plate 641 is pushed backward and directly discharged through the discharge pipe three 66 on the rear side.

[0037] See also Figure 2 The outer ring surface of the spiral push shaft 61 is fixedly connected to a plurality of scrapers 62 at positions corresponding to the mesh screen 63 through support rods, and a brush is installed on one side of the scraper 62 away from the axis of the spiral push shaft 61.

[0038] During specific operation, when the spiral push shaft 61 rotates, the scraper 62 rotates synchronously therewith, and the brush on the scraper 62 contacts the mesh screen 63, so that the mesh screen 63 can be unblocked to avoid clogging of the mesh screen 63 and reduce the sorting effect.

[0039] See also Figure 1 and Figure 5 The shaking assembly 76 includes a mounting plate 768 symmetrically fixedly connected to the middle of the front side of the sorting tank 2, a rotating shaft 765 is rotatably connected between the upper and lower mounting plates 768, and a plurality of cams 763 are fixedly connected to the rotating shaft 765. The positions corresponding to the cams 763 on the side of the front stand 3 close to the sorting tank 2 are rotatably connected to rollers 764, and the cams 763 and the rollers 764 are in rolling contact with each other in a one-to-one correspondence. A plurality of support rods 767 equidistantly distributed above and below are slidably connected to the front stand 3, and one end of each support rod 767 is fixedly connected to a limited position head 1. The other ends are fixedly connected to the sorting tank 2, and a spring 766 is sleeved on a section of each support rod 767 between the limit head 1 and the front side frame 3. A support rod 761 corresponding to the support rod 767 is slidably connected to the rear side frame 3. One end of each support rod 761 is fixedly connected to the limit head 2, and the other end is fixedly connected to the sorting tank 2. Each support rod 761 is fixedly connected to a back plate located between the sorting tank 2 and the rear side frame 3, and a spring 762 is sleeved on a section of each support rod 761 between the back plate and the rear side frame 3.

[0040] During specific operation, the cam 763 is controlled to rotate by rotating the rotating shaft 765, and the cam 763 is in contact with the roller 764, so that the sorting tank 2 reciprocates away from or close to the front stand 3. Through the combined action of the spring 1 762 and the spring 2 766, the cam 763 and the roller 764 are kept in contact, and the sorting tank 2 can also be automatically reset, so that the sorting tank 2 is shaken, increasing the collision force between the silicon carbide micropowder and the cone 71 and the ring screen, and the silicon carbide micropowder clumps are collided and crushed, while also improving the secondary sorting effect of the silicon carbide micropowder.

[0041] See also Figure 5 The rotating assembly 72 includes a bevel gear 4 726 fixedly connected to the outer wall of the upper side of the central rotating tube 75, the outer periphery of the bevel gear 4 726 is meshedly connected with the bevel gear 3 725, the center of the bevel gear 3 725 is fixedly connected with a rotating rod 724, the rotating rod 724 rotates through the side wall of the sorting tank 2 and is fixedly connected with the bevel gear 1 722, the outer periphery of the bevel gear 1 722 is meshedly connected with the bevel gear 2 723, and the bevel gear 2 723 is fixedly connected to the rotating shaft 765.

[0042] During specific operation, the rotation of bevel gear 2 723 is controlled by rotating shaft 765, and bevel gear 2 723 drives rotating rod 724 through bevel gear 1 722, and rotating rod 724 drives bevel gear 4 726 through bevel gear 3 725, and central rotating tube 75 is driven to rotate through bevel gear 4 726, thereby driving cone 71 and frustum 74 to rotate. The rotating cone 71 and frustum 74 are in contact with silicon carbide powder, so as to further collide and crush silicon carbide powder agglomerates, thereby improving the sorting effect.

[0043] See also Figure 2 and Figure 5 A linkage assembly 78 for controlling the synchronous operation of the shaking assembly 76 and the rotating assembly 72 is provided between the sorting tank 2 and the outer shell 646. The linkage assembly 78 includes a bevel gear 5 781 fixedly connected to the upper end of the rotating shaft 765, and the periphery of the bevel gear 5 781 is meshingly connected with a bevel gear 6 782. The center of the bevel gear 6 782 is fixedly connected to a pin rod 783, and the pin rod 783 is rotatably connected to a bracket 785. The bracket 785 is fixedly connected to the top of the sorting tank 2, and the end of the pin rod 783 away from the bevel gear 6 782 is fixedly connected to a connecting gear 784, and the upper side of the connecting gear 784 is meshingly connected with a tooth column 786. The front end of the tooth column 786 is fixedly connected to the rear end of the reciprocating screw 644, and the rear end is rotatably connected to the bottom of the conveying cylinder 5 through a support block.

[0044] During specific operation, the rotation of the reciprocating screw 644 drives the gear column 786 to rotate, and the gear column 786 drives the pin rod 783 to rotate through the connecting gear 784, and the pin rod 783 drives the bevel gear five 781 to rotate through the bevel gear six 782, and the bevel gear five 781 drives the rotating shaft 765 to rotate, so that the shaking assembly 76, the rotating assembly 72, the pushing assembly 64 and the spiral pushing shaft 61 can rotate synchronously to realize single-power operation.

[0045] See also Figure 6 The lower outer wall of the central rotating tube 75 is fixedly connected with an inverted L-shaped connecting frame 231, the horizontal section of the connecting frame 231 is located between the lower support frame 73 and the adapter seat 79, and the lower end of the vertical section of the connecting frame 231 is fixedly connected with a scraper plate 232, and the scraper plate 232 and the lower end of the movable plate 641 are also provided with a plurality of brushes.

[0046] During specific operation, when the central rotating tube 75 rotates, the scraper 232 and the brush at its lower end cooperate to push the silicon carbide micropowder that falls to the bottom wall of the bottom pocket 22, so that the silicon carbide micropowder moves to the position of the discharge tube 1 23, which is convenient for the centralized pushing out of the silicon carbide micropowder.

[0047] See also Figure 2 and Figure 5 The sieve hole 1 631 and the sieve hole 2 have the same caliber. In specific work, it can ensure that the silicon carbide micropowder particles screened twice have the same specifications, which is convenient for subsequent classification and concentration.

[0048] See also Figure 5 The lower side of the upper support frame 73 is fixedly connected with a blocking cover 721 through a support plate, bevel gear four 726 and bevel gear three 725 are distributed in the blocking cover 721, and a hole for the rotating rod 724 to pass through is opened on the side wall of the blocking cover 721 corresponding to the position of the rotating rod 724, and the blocking cover 721 is rotatably connected to the central rotating tube 75.

[0049] During specific operation, the baffle 721 is used to protect the bevel gear four 726 and the bevel gear three 725 from dust, which can reduce the amount of silicon carbide powder falling into the tooth gap between the bevel gear four 726 and the bevel gear three 725, ensure the meshing effect of the bevel gear four 726 and the bevel gear three 725, and reduce gear wear.

[0050] When in use: S1: First, the silicon carbide powder is input into the conveying cylinder 5 through the lower hopper 51, and the spiral pushing shaft 61 is controlled to rotate by the motor 65, and the spiral pushing shaft 61 pushes the silicon carbide powder, and the conveying silicon carbide powder is sorted through the mesh screen 63.

[0051] S2: The silicon carbide micropowder of the first-stage sorting will fall into the outer shell 646, and the spiral push shaft 61 will rotate, driving the synchronous belt to control the reciprocating screw 644 to rotate and control the movable plate 641 to move back and forth along the guide rod 645 in the outer shell 646. When the movable plate 641 moves forward, the silicon carbide micropowder is pushed forward, and a large amount of the screened silicon carbide micropowder is directly discharged through the discharge pipe three 66 on the front side. When the movable plate 641 moves backward, the silicon carbide micropowder that falls during the forward movement of the movable plate 641 will be pushed backward and directly discharged through the discharge pipe three 66 on the rear side.

[0052] S3: Then, the silicon carbide micropowder transported by the sorting and conveying mechanism 6 is input into the sorting tank 2 through the feed port 21. Under the action of gravity, the silicon carbide micropowder automatically falls down. First, the silicon carbide micropowder is sorted by the second sieve hole on the upper cone 71. Then, the silicon carbide micropowder sorted by the second sieve hole on the upper cone 71 directly enters the second feed pipe 24 through the central transfer pipe 75, and the unsorted silicon carbide micropowder falls into the truncated cone 74. A part of the silicon carbide micropowder that falls into the truncated cone 74 is sorted again through the second sieve hole on the side wall of the annular sieve, and a part falls from the middle of the annular sieve to the lower cone 71 for sorting. Finally, the unsorted silicon carbide micropowder is concentratedly transported to the bottom pocket 22 through the cone bucket 77.

[0053] S4: While S3 is being carried out, the rotation of the reciprocating screw 644 drives the tooth column 786 to rotate, and the tooth column 786 drives the pin rod 783 to rotate through the connecting gear 784, and the pin rod 783 drives the bevel gear 5 781 to rotate through the bevel gear 6 782, and the bevel gear 5 781 drives the rotating shaft 765 to rotate, and the rotation of the rotating shaft 765 controls the rotation of the cam 763, and the cam 763 contacts the roller 764, so that the sorting tank 2 reciprocates away from or close to the front stand 3, and the cam 763 and the roller 764 are kept in contact by the combined action of the spring 1 762 and the spring 2 766, and the sorting tank 2 can also be automatically reset. In this way, the sorting tank 2 is caused to shake, and the collision force between the silicon carbide micropowder and the cone 71 and the frustum 74 is increased, so that the silicon carbide micropowder clumps are collided and crushed. At the same time, the rotation of the rotating shaft 765 controls the rotation of the bevel gear 2 723, and the bevel gear 2 723 drives the rotating rod 724 to rotate through the bevel gear 1 722, and the rotating rod 724 drives the bevel gear 4 726 to rotate through the bevel gear 3 725, and the central rotating tube 75 is driven to rotate through the bevel gear 4 726, thereby driving the cone 71 and the frustum 74 to rotate. The rotating cone 71 and the frustum 74 are used to contact the silicon carbide micropowder, so that the silicon carbide micropowder clumps can be further collided and crushed.

[0054] S5: When the central rotating tube 75 rotates, the silicon carbide micropowder that has fallen to the bottom pocket 22 is pushed by the scraper 232, so that the silicon carbide micropowder moves to the position of the discharge pipe 1 23, and the unsorted silicon carbide micropowder is discharged from the discharge pipe 1 23.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated powder feeding device for producing silicon carbide micropowder, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixedly connected to two vertical frames (3) arranged symmetrically in front and behind. The upper end surface of the base (1) is also fixedly connected to a support seat (52) located in front of the two vertical frames (3). A conveying cylinder (5) is arranged at the upper end of the support seat (52). A lower hopper (51) is installed at the upper front part of the conveying cylinder (5). A discharge port (53) is installed at the lower rear part of the conveying cylinder (5). A sorting and conveying mechanism (6) for screening and conveying silicon carbide micropowder is arranged in the conveying cylinder (5). A sorting tank (2) is arranged between the front and rear vertical frames (3). A feed port (21) is arranged at the upper end of the sorting tank (2). A bottom bag (22) is fixedly connected to the lower end of the sorting tank (2). The feed port (21) and the discharge port (53) are connected by an elastic connecting hose (4). A secondary screening mechanism (7) for secondary screening of silicon carbide micropowder is arranged inside and outside the sorting tank (2). The sorting and conveying mechanism (6) comprises a spiral push shaft (61) rotatably connected to the conveying cylinder (5), the rear end of the spiral push shaft (61) extending to the outside of the conveying cylinder (5) and fixedly connected to the output end of the motor (65), the motor (65) being fixedly connected to the outside of the conveying cylinder (5), a mounting opening being provided at the lower front part of the conveying cylinder (5), a mesh screen (63) being installed in the mounting opening, a plurality of mesh holes (631) being provided on the mesh screen (63), and a push-out assembly (64) for centrally pushing out the sieved silicon carbide micropowder being provided outside the mesh screen (63); The secondary screening mechanism (7) comprises two support frames (73) respectively fixedly connected to the bottom pocket (22) and the inner wall of the sorting tank (2); the centers of the upper and lower support frames (73) are rotatably connected to a central rotating tube (75); the upper end and the middle of the central rotating tube (75) are both connected to a cone (71) connected thereto; a shaking assembly (76) for controlling the sorting tank (2) to reciprocate forward and backward is arranged outside the sorting tank (2); and a rotating assembly (72) for controlling the central rotating tube (75) to rotate is arranged between the central rotating tube (75) and the sorting tank (2); The central rotating pipe (75) is connected to the tip of the cone (71). The upper cone (71) is arranged below the feed port (21). An inverted truncated cone (74) is arranged between the upper and lower cones (71). The truncated cone (74) is rotatably mounted inside the separation tank (2). The upper and lower ends of the truncated cone (74) are connected and an annular screen having an inverted truncated cone shape in vertical cross section is arranged inside the truncated cone. The central rotating pipe (75) vertically passes through the middle of the truncated cone (74). The lower edge of the truncated cone (74) is connected to a plurality of connecting pipes ( 741), the lower end of the connecting pipe (741) penetrates into the lower cone (71), the upper cone walls of the cones (71) on the upper and lower sides and the side walls of the ring screen are provided with a plurality of sieve holes 2, a cone bucket (77) is fixedly connected to the upper side of the bottom pocket (22), a first feeding pipe (23) and a second feeding pipe (24) which are connected to the bottom wall of the bottom pocket (22) and are arranged front and rear, the upper end of the second feeding pipe (24) extends into the sorting tank (2) and is fixedly connected to a transfer seat (79), and the transfer seat (79) is rotatably connected to the central rotating pipe (75); The ejection assembly (64) comprises an outer shell (646) fixedly connected to the outside of the conveying cylinder (5) and corresponding to the mesh screen (63); a discharge pipe (66) connected to the inside of the outer shell (646) is symmetrically installed on the front and rear sides of the lower side of the outer shell (646); a reciprocating screw (644) is rotatably connected between the front and rear walls of the outer shell (646) and is fixedly connected to a guide rod (645); the front end of the reciprocating screw (644) extends to the outside of the outer shell (646) and is connected to the spiral push shaft (61) through a synchronous belt; a movable plate (641) is slidably connected to the guide rod (645); and the movable plate (641) is also threadedly connected to the reciprocating screw (644); The shaking assembly (76) comprises a mounting plate (768) symmetrically fixedly connected to the middle of the front side of the sorting tank (2) from top to bottom, a rotating shaft (765) rotatably connected between the upper and lower mounting plates (768), a plurality of cams (763) fixedly connected to the rotating shaft (765), a roller (764) rotatably connected to a position corresponding to each cam (763) on a side of the front side stand (3) close to the sorting tank (2), the cams (763) and the rollers (764) rollingly contact each other in a one-to-one correspondence, a plurality of support rods (767) equidistantly distributed from top to bottom are slidably connected to the front side stand (3), one end of each support rod (767) is fixedly connected to a limit head (764), The other ends are fixedly connected to the sorting tank (2); a section of each support rod (767) between the limit head (1) and the front stand (3) is sleeved with a spring (766); a support rod (761) corresponding to the support rod (767) is slidably connected to the rear stand (3); one end of each support rod (761) is fixedly connected to the limit head (2) and the other end is fixedly connected to the sorting tank (2); each support rod (761) is fixedly connected to a stop plate located between the sorting tank (2) and the rear stand (3); and a section of each support rod (761) between the stop plate and the rear stand (3) is sleeved with a spring (762); The rotating assembly (72) comprises a bevel gear four (726) fixedly connected to the outer wall of the upper side of the central rotating tube (75); the outer periphery of the bevel gear four (726) is meshingly connected to the bevel gear three (725); the center of the bevel gear three (725) is fixedly connected to a rotating rod (724); the rotating rod (724) rotates through the side wall of the sorting tank (2) and is fixedly connected to the bevel gear one (722); the outer periphery of the bevel gear one (722) is meshingly connected to the bevel gear two (723); the bevel gear two (723) is fixedly connected to the rotating shaft (765); A linkage assembly (78) for controlling the synchronous operation of the shaking assembly (76) and the rotation assembly (72) is provided between the separation tank (2) and the outer shell (646). The linkage assembly (78) comprises a bevel gear five (781) fixedly connected to the upper end of the rotating shaft (765). The outer periphery of the bevel gear five (781) is meshingly connected to a bevel gear six (782). The center of the bevel gear six (782) is fixedly connected to a pin rod (783). The pin rod (783) is rotatably connected to a bracket (785). The bracket (785) is fixedly connected to the top of the separation tank (2). An end of the pin rod (783) away from the bevel gear six (782) is fixedly connected to a connecting gear (784). The upper side of the connecting gear (784) is meshingly connected to a tooth column (786). The front end of the tooth column (786) is fixedly connected to the rear end of the reciprocating screw (644). The rear end is rotatably connected to the bottom of the conveying cylinder (5) through a support block.

2. The automatic powder feeding equipment for producing silicon carbide micropowder according to claim 1, characterized in that: A plurality of scrapers (62) are fixedly connected to the outer ring surface of the spiral push shaft (61) at positions corresponding to the mesh screen (63) via support rods, and a brush is installed on one side of the scraper (62) away from the axis of the spiral push shaft (61).

3. The automatic powder feeding equipment for producing silicon carbide micropowder according to claim 1 is characterized in that: An inverted L-shaped connecting frame (231) is fixedly connected to the lower outer wall of the central rotating tube (75); a horizontal section of the connecting frame (231) is located between the lower supporting frame (73) and the adapter seat (79); a second scraper (232) is fixedly connected to the lower end of the vertical section of the connecting frame (231); the second scraper (232) contacts the bottom wall of the bottom pocket (22).

4. The automatic powder feeding equipment for producing silicon carbide micropowder according to claim 1, characterized in that: A blocking cover (721) is fixedly connected to the lower side of the upper support frame (73) via a support plate. Bevel gear 4 (726) and bevel gear 3 (725) are distributed in the blocking cover (721). A through hole for the rotating rod (724) to pass through is opened on the side wall of the blocking cover (721) at a position corresponding to the rotating rod (724). The blocking cover (721) is rotatably connected to the central rotating tube (75).

5. The automatic powder feeding equipment for producing silicon carbide micropowder according to claim 1, characterized in that: The calibers of the sieve hole 1 (631) and the sieve hole 2 are the same.

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