Mixed processing technology and equipment for silicon carbide rod

Abstract

The invention discloses a silicon carbide rod mixing processing technology and equipment, the silicon carbide rod mixing processing equipment comprises a mixing rack, the mixing rack is a frame of a rectangular structure, the mixing rack is provided with a mixing cylinder, the mixing cylinder is arranged in a horizontal structure, the mixing cylinder is provided with an integrated mixer, and the integrated mixer is arranged in a horizontal structure. A multi-channel feeder is arranged on the integrated mixer; the invention relates to the technical field of silicon carbide rod processing, according to the silicon carbide rod mixing and processing equipment, the mixing barrel of the integrated mixer is matched with radial mixing and stirring of the stirring structure in a rolling mode, multi-dimensional composite motion is generated, high-precision mixing of silicon carbide rod raw materials is achieved, a power device for mixing and a feeding and discharging device are optimized, and the production efficiency is improved. And the problems of non-uniform particle size distribution, low feeding efficiency and the like caused by one-way mixing of traditional equipment are solved, and the mixing uniformity and the production operation efficiency are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbon rod processing, in particular to a mixed processing technology and equipment for silicon carbon rods. Background Art

[0002] Silicon carbide rod is a non-metallic high-temperature electric heating element. It uses high-purity green hexagonal silicon carbide as the main raw material, is processed into blanks according to a certain material ratio, and is sintered at a high temperature of 2200℃ for siliconization, recrystallization and sintering to produce rod-shaped or tubular non-metallic heating elements.

[0003] Silicon carbon rods have the characteristics of high operating temperature, high temperature resistance, oxidation resistance, corrosion resistance, fast heating, long service life, small high temperature deformation, easy installation and maintenance, and good chemical stability. Due to the above advantages, silicon carbon rods are widely used as heating elements in metallurgy, ceramics, glass, semiconductors, chemical industry and other fields.

[0004] In the modern silicon carbide rod processing process, silicon carbide rods need to use high-purity silicon carbide as raw material, and go through multiple processes such as proportioning, mixing, molding, drying and sintering. Among them, proportioning and mixing are important process steps to maintain the effect of silicon carbide rods. In order to improve the sintering effect, it is necessary to ensure uniform mixing of materials while accurately proportioning.

[0005] At present, in the preparation and processing of silicon carbon rods, the preparation of silicon carbon rods mainly uses high-purity (usually >98%) green or black silicon carbide particles and fine powder as the main materials, and a binder is also added. The temporary binder is mainly used to provide plasticity in the molding stage, such as dextrin, syrup, lignin sulfonate, methyl cellulose and other water-soluble organic binders. These components will be burned during the sintering process, while the permanent binder participates in the reaction or forms a liquid phase to promote sintering at high temperature, and eventually becomes part of the product structure. Silicon powder or a mixture of silicon and carbon is commonly used to provide a silicon source for reaction sintering, and sometimes a small amount of sintering aids such as alumina and clay are also added.

[0006] During the batching process, it is necessary to reasonably match the ratio of coarse, medium and fine particles to obtain high packing density and good sintering activity. Coarse particles form the skeleton, and fine particles fill the gaps and participate in the reaction. The purity, crystal form (mainly α-SiC) and particle size distribution of silicon carbide are crucial to the performance and sintering of the final product. At this stage, silicon carbide and auxiliary materials need to be accurately proportioned during mixing.

[0007] The current mixing device and mixing process mainly use an auger for mixing, and the materials are loaded in batches so that multiple batches of materials can be fully mixed and evenly mixed. However, the current mixing equipment usually has a mixing effect in only one direction, which is prone to uneven mixing during mixing, resulting in uneven particle size distribution. For example, the patent with publication number CN118577168A discloses an automated mixing and stirring device for raw materials for silicon carbide preparation. Through the front guide pipe, when the raw materials are transported, the material body no longer squeezes the baffle plate. At this time, the spring expands, driving the baffle plate to move and block one end of the conduit, effectively preventing the raw materials inside the mixing barrel from causing powder to diffuse to the outside during the full mixing process, thereby avoiding material waste. However, because only one front guide pipe is set, the material can only be added through one channel, which is very cumbersome and will also cause low material mixing efficiency and poor mixing effect. In view of this, in-depth research on the above problems resulted in this case. Summary of the Invention

[0008] In view of the deficiencies of the prior art, the present invention provides a hybrid processing technology and equipment for silicon carbon rods, which solves the problems of the prior art.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A mixing processing device for silicon carbon rods, comprising a mixing frame, the mixing frame being a rectangular frame, a mixing cylinder being provided on the mixing frame, the mixing cylinder being arranged in a horizontal structure, an integrated mixer being provided on the mixing cylinder, and a multi-channel feeder being provided on the integrated mixer;

[0010] The multi-channel feeder is composed of a plurality of automatic feeding devices arranged on an integrated mixer, each of which contains materials of different types and particle sizes. The automatic feeding devices quantitatively deliver the materials into the mixing cylinder. The mixing cylinder is provided with a rotating sprinkler connected to the multi-channel feeder, and the materials entering from the multi-channel feeder are dispersed by the sprinkler effect.

[0011] The integrated mixer includes a power assembly, which is arranged on one side of the mixing cylinder. A driving shaft extends from the power assembly, and the driving shaft is linked to the mixing cylinder. A plurality of stirring structures are arranged in the mixing cylinder. The power assembly serves as the power basis. The power assembly drives the mixing cylinder to rotate through the driving shaft. The mixing cylinder rotates with the horizontal axis, and the material is stirred during the rotation of the mixing cylinder.

[0012] The integrated mixer further includes a support base, which is arranged on the mixing frame and movably connected to the mixing cylinder. A speed control component is provided on the support base, and the speed control component is linked with a plurality of stirring structures. The support base supports the mixing cylinder so that the mixing cylinder can rotate horizontally, and then the speed control component on the support base is linked with a plurality of stirring structures in the mixing cylinder. The stirring structure rotates in the radial direction of the mixing cylinder to further mix and stir the materials.

[0013] A positioner is provided on one side of the outer circumference of the mixing cylinder, and a parking device is provided on one side of the support seat. The positioner and the parking device cooperate to stop the mixing cylinder. A discharge port is provided on one side of the positioner, and the material is discharged from the discharge port after stopping.

[0014] The mixing frame is a rectangular frame. A plurality of barrel supports are provided on one side of the mixing frame. The barrel supports are used to place barrels containing different materials.

[0015] The mixing cylinder is a cylinder with a cylindrical structure, a pair of shoulders extend from both sides of the central axis of the mixing cylinder, the support seat is a trapezoidal structure, a pair of bearings are provided on the top of the support seat, and the pair of shoulders are assembled in the pair of bearings. The outer periphery of the mixing cylinder is wrapped with a sealing ring sleeve, and a number of toggle plates are provided in the inner ring of the mixing cylinder. The side edges of the toggle plates are in contact with the inner side of the sealing ring sleeve, and the two sides of the mixing cylinder are rotatably sealed with the two sides of the sealing ring sleeve.

[0016] The automatic feeding device includes a weighing silo, which is connected to the bottom end of the barrel. A feeding pipe extends from one side of the weighing silo and is connected to the loading port of the mixing barrel. A conveying motor is provided on the weighing silo, and a threaded feeder is connected to the driving end of the conveying motor. The threaded feeder is assembled in the feeding pipe.

[0017] The power assembly includes a power motor, one side of the power motor is connected to a gear reducer, the output end of the gear reducer is connected to the driving shaft, a shaft seat is provided on the mixing frame to stabilize the driving shaft, a rotating ring gear is provided on one side of the mixing cylinder, a driving gear is provided on the driving shaft, and the driving gear is meshed with the rotating ring gear.

[0018] The rotary sprinkler includes a central shaft cylinder, which is movably mounted on the upper part of the blocking ring sleeve, and is provided with a plurality of fly holes on the central shaft cylinder. An automatic rotation regulator is provided on the outside of the central shaft cylinder;

[0019] The automatic rotation regulator includes a control motor, which is arranged on one side of the central shaft, a driving end of the control motor is connected to a rotating worm, and a rotating worm wheel is arranged on the outer sleeve of the central shaft to mesh with the rotating worm.

[0020] The stirring structure includes a fixed shaft seat, a fixed shaft seat is provided on the inner side of the mixing cylinder, a hybrid shaft is mounted on the fixed shaft seat, the hybrid shaft is arranged along the radial direction of the mixing cylinder, a mixing auger is provided on the outer sleeve of the hybrid shaft, a drive shaft sleeve is connected between a pair of shaft shoulders, and one end of the hybrid shaft extends to the drive shaft sleeve.

[0021] The discharge port is an opening of a square structure, and a closed door of a sliding structure is provided on the discharge port. The closed door is opened and closed by an electric control.

[0022] The parking device includes a parking control motor, which is installed on a support base. The end of the parking control motor is connected to a parking telescopic rod. A parking telescopic rod is provided on one side of the support base. A limit screw is connected to the parking telescopic rod. The end of the limit screw is connected to an adjustment seat. An adjustment hole is provided on the support base, and the adjustment hole is threadedly engaged with the limit screw.

[0023] The positioner includes a positioning sleeve, which is extended from the side wall of the mixing cylinder. A positioning spring is installed in the positioning sleeve, and a positioning block is installed in the positioning sleeve. The positioning block corresponds to the adjustment seat.

[0024] The speed control assembly includes a speed control motor. A speed control motor is provided on one side of the support seat. A driving end of the speed control motor is connected to a speed control gear box. An adjusting shaft is connected to the speed control gear box. The adjusting shaft is inserted from a shaft shoulder on one side. The end of the adjusting shaft is connected to a control gear set and is connected to the end of the hybrid shaft.

[0025] The control gear set includes a main gear, a main gear is provided at the end of the adjusting shaft, a sub-gear is connected to the end of the hybrid shaft, the main gear is meshed with the sub-gear, a slot is provided on the adjusting shaft, an adapter is connected to the end of the slot, a pulse air pump is connected to one side of the adapter, a plurality of spray holes are provided on the outer ring of the hybrid shaft, and a plurality of one-way jet valves are provided on the spray holes.

[0026] A mixing process for silicon carbon rods, comprising the following steps: step 1, raw material preparation; step 2, multi-channel quantitative feeding; step 3, three-dimensional spreading and dispersion; step 4, two-way composite mixing; step 5, pulse airflow anti-sticking; step 6, precise material discharge; step 7, quality inspection;

[0027] Step 1. Raw material preparation: According to particle size, the raw materials are divided into four categories: coarse silicon carbide (>100 mesh), fine silicon carbide (<325 mesh), silicon powder / dextrin solution as binder, and alumina as sintering aid. They are loaded into the corresponding barrel of the barrel holder respectively. The binder solution needs to be stirred in advance until uniform. The ultrafine powder needs to be passed through a vibrating screen to remove lumps.

[0028] Step 2: Multi-channel quantitative feeding: Based on the formula ratio of coarse:fine = 6:4 and the binder 5wt%, the target weight is input into the weighing silo control system with an error limit of ±0.5%. All automatic feeding devices are activated, and the servo motor drives the screw feeder to deliver the material to the central axis of the rotary sprinkler at a preset speed, ensuring that the four types of materials are fed synchronously or in the order of coarse → fine → binder;

[0029] Step 3: Three-dimensional spreading and dispersion: Control the motor to drive the rotating worm to rotate the central shaft cylinder to meet the dispersion requirements of fine powder and coarse particles. The material is evenly scattered into the cylinder space through the fly hole to avoid accumulation at the entrance, forming a three-dimensional distribution in the axial and circumferential directions.

[0030] Step 4: Bidirectional compound mixing: Start the power motor to drive the mixing cylinder to rotate horizontally at 8-12rpm. The toggle plate lifts the material to a high position and then rolls it down to achieve gravity tumbling mixing. The synchronous speed-controlled motor drives the mixing shaft to rotate radially at 100-150rpm through the main and auxiliary gears. The mixing auger shears and convects the material to break up agglomerations. In the initial stage, the cylinder and the stirring structure rotate in the same direction to enhance material pushing, and in the middle stage, the reverse rotation enhances the dispersion effect.

[0031] Step 5: Pulse airflow to prevent sticking: After mixing for 10 minutes, turn on the pulse air pump, set the compressed air pressure to 0.4-0.6MPa, and deliver it to the spray hole of the hybrid shaft through the air channel inside the regulating shaft. The one-way jet valve intermittently sprays air at a frequency of 1Hz to sweep the cylinder wall and the auger blades to prevent fine powder from sticking. The residual amount is controlled below 0.2%;

[0032] Step 6. Accurate discharge: After mixing is completed, the parking motor is controlled to drive the limit screw to make the adjustment seat cooperate with the positioning ring sleeve, lock the cylinder to the lowest position of the discharge port, and the angle error is less than 2°. The electric push rod opens the sliding closed door, and the material is completely discharged by gravity. The discharge time is less than 3 minutes, and there is no dust leakage.

[0033] Step 7, quality inspection: Take samples after discharge and use laser particle size analyzer to detect particle size distribution. The D50 deviation is <5μm. Combined with XRF to detect elemental composition, the formula deviation is <0.3%.

[0034] The present invention provides a mixing process and equipment for silicon carbon rods. The process has the following beneficial effects: The rolling mixing cylinder of the integrated mixer and the radial mixing of the stirring structure generate a multi-dimensional composite motion, achieving high-precision mixing of the silicon carbon rod raw materials. Furthermore, the mixing power device and the loading and unloading device are optimized, making them easier to operate and use. This solves the problems of uneven particle size distribution and low loading efficiency caused by one-way mixing in traditional equipment, significantly improving mixing uniformity and production operation efficiency. Furthermore, the process has the following beneficial effects:

[0035] 1. Multi-channel quantitative feeding: 3-4 independent weighing silos deliver different materials synchronously or sequentially, and the servo motor accurately controls the speed of the screw feeder to ensure that the formula ratio error is less than 0.5%, solving the problems of low efficiency and easy confusion of single channels;

[0036] 2. Three-dimensional spreading and dispersion: The rotating spreader evenly spreads the material into the space inside the barrel through the combined action of the adjustable angle flying hole and the rotation of the barrel, avoiding accumulation at the entrance and creating homogeneous initial conditions for subsequent mixing;

[0037] 3. Bidirectional compound mixing: The horizontal axial rotation of the cylinder generates gravity tumbling, and the radial rotation of the stirring structure forms shear convection. The directions of the two can be adjusted in the same or opposite directions, deeply breaking the powder agglomeration and making the coarse and fine particles evenly interspersed;

[0038] 4. Pulse airflow anti-sticking: Compressed air is ejected from the one-way jet valve through the internal air channel of the hybrid shaft, intermittently sweeping the cylinder wall and the auger blades, effectively solving the problem of ultrafine powder and binder sticking to the wall. At the same time, the impact effect of the high-pressure airflow disperses the material, reducing the residual amount to <0.2% and improving the mixing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a first stereoscopic structural schematic diagram of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0040] Figure 2 This is a second three-dimensional structural schematic diagram of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0041] Figure 3 The figure is a schematic top view of the structure of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0042] Figure 4 The present invention provides a cross-sectional structural diagram of an automatic feeding device of a mixing processing technology and equipment for silicon carbon rods.

[0043] Figure 5 This is a third stereoscopic structural schematic diagram of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0044] Figure 6 The present invention provides a schematic diagram of a sealing ring structure of a hybrid processing technology and equipment for silicon carbon rods.

[0045] Figure 7 This is a fourth three-dimensional structural schematic diagram of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0046] Figure 8 The figure is a schematic diagram of the stirring structure of the mixing processing technology and equipment of the silicon carbon rods according to the present invention.

[0047] Figure 9 This is a fifth stereoscopic structural diagram of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0048] Figure 10 This is a schematic diagram of the parking structure of a hybrid processing technology and equipment for silicon carbon rods according to the present invention.

[0049] Figure 11 A mixed processing technology and equipment for silicon carbon rods according to the present invention Figure 10 Schematic diagram of the locally enlarged structure at point A in the middle.

[0050] In the figure: 1. Mixing frame; 2. Mixing barrel; 3. Integrated mixer; 4. Multi-channel feeder; 5. Positioner; 6. Stopper; 7. Feeding port; 11. Barrel bracket; 12. Support seat; 13. Bearing; 21. Shaft shoulder; 22. Blocking ring; 23. Toggle plate; 31. Power assembly; 32. Driving shaft; 33. Pulse air pump; 34. Agitation structure; 35. Speed ​​control assembly; 41. Automatic feeding device; 42. Rotating sprinkler; 43. Material holding barrel; 51. Positioning sleeve; 52. Positioning spring; 53. Positioning block; 61. Control stop motor; 62. Parking telescopic rod; 63. Limit screw; 64. Adjustment seat; 65. Adjustment hole; 311. Power motor; 31 2. Gear reducer; 313. Rotating ring gear; 314. Drive gear; 341. Fixed shaft seat; 342. Hybrid shaft; 343. Mixing auger; 344. Drive shaft sleeve; 351. Speed ​​control motor; 352. Speed ​​control gearbox; 353. Adjusting shaft; 354. Control gear set; 411. Weighing silo; 412. Feeding pipe; 413. Conveying motor; 414. Threaded feeder; 421. Center shaft; 422. Flying hole; 423. Automatic rotation regulator; 3541. Main gear; 3542. Sub-gear; 3543. Slot; 3544. Adapter; 3545. Spray hole; 4231. Control motor; 4232. Rotating worm; 4233. Rotating worm wheel. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] See also Figure 1-11The present invention provides an implementation scheme: the current mixing equipment usually has a mixing effect in only one direction, which easily causes uneven mixing during mixing and uneven particle size distribution. Common mixing equipment also uses eccentric mixing or V-shaped mixing. This type of mixing equipment often only focuses on improving the mixing effect of the mixing equipment, but does not notice that its improved form affects the convenience and uniformity of feeding. The operation is very cumbersome and will also cause low material mixing efficiency and poor mixing effect.

[0053] According to the instruction manual Figure 1-11 It can be seen that in order to solve the above problems, the present application discloses a mixing processing equipment for silicon carbon rods, including a mixing frame 1. The mixing frame 1 is a rectangular structure frame, which is welded from high-strength steel. The mixing frame 1 serves as the basic support structure of the equipment, and its rectangular frame design ensures overall stability; a mixing cylinder 2 is provided on the mixing frame 1. The mixing cylinder 2 adopts a horizontal structure arrangement, and its main body is a stainless steel cylinder. An integrated mixer 3 is provided on the mixing cylinder 2, and a multi-channel feeder 4 is provided on the integrated mixer 3;

[0054] The multi-channel feeder 4 is composed of a plurality of automatic feeding devices 41 arranged in a ring on the integrated mixer 3, wherein the number of the ring arrangements is 3-4 and is arranged on one side of the cylinder; the plurality of automatic feeding devices 41 respectively contain materials of different types and particle sizes, for example: coarse-grained silicon carbide>100 mesh, fine-grained silicon carbide<325 mesh, binder solution, silicon powder mixture, etc.; the automatic feeding device 41 delivers the various materials into the mixing cylinder 2 in a quantitative manner, so as to realize the accurate, independent, synchronous or sequential addition of materials of different formulas, and overcome the problems of low efficiency and easy confusion of the traditional single feed port; a rotating sprinkler 42 is provided on the mixing cylinder 2 and is connected to the multi-channel feeder 4, and the material entering from the multi-channel feeder 4 is dispersed by the sprinkling effect; this design uses centrifugal force to break up the material clumps that have just entered and evenly scatter them in the internal space of the cylinder, avoiding the accumulation of materials at the entrance and creating initial conditions for subsequent uniform mixing;

[0055] The integrated mixer 3 includes a power assembly 31, which is arranged on one side of the mixing cylinder 2. A driving shaft 32 extends from the power assembly 31, and the driving shaft 32 is linked to the mixing cylinder 2. The specific linkage method is as follows: a plurality of stirring structures 34 are provided in the inner ring of the mixing cylinder 2. These stirring structures 34 are evenly spaced along the circumference of the inner wall of the cylinder, and at least four groups are arranged in the cylinder; with the power assembly 31 as the power basis, the power assembly 31 drives the mixing cylinder 2 to rotate through the driving shaft 32, and the mixing cylinder 2 rotates about the horizontal axis, and the speed can be adjusted within the range of 3-15rpm; the material is stirred during the rotation of the mixing cylinder 2; the rotation of the cylinder produces a gravity tumbling effect, so that the material is continuously lifted and rolled in the cylinder, thereby achieving rolling mixing;

[0056] The integrated mixer 3 also includes a support base 12, which is arranged on the mixing frame 1. The support base 12 is made of cast iron and has sufficient rigidity and wear resistance. The support base 12 is movably connected to the mixing cylinder 2. A speed control component 35 is provided on the support base 12. The speed control component 35 is linked with a number of stirring structures 34. The support base 12 supports the mixing cylinder 2 so that the mixing cylinder 2 can rotate horizontally. The heavy-duty roller bearings on the support base 12 ensure that the cylinder rotates smoothly with low resistance. Then the speed control component 35 on the support base 12 and the mixing cylinder are connected. Several stirring structures 34 in the mixing cylinder 2 are linked together, and the stirring structures 34 rotate in the radial direction of the mixing cylinder 2. The rotation direction of the stirring structures 34 can be the same as or opposite to the rotation direction of the cylinder, and the speed is independently adjustable within the range of 50-200 rpm; further mixing and stirring the materials; the radially rotating stirring structures 34 produce strong shear, convection and diffusion effects on the materials, especially breaking up fine powder agglomerates and promoting the interlaced distribution of particles of different particle sizes, solving the problem of uneven particle size distribution in traditional one-way mixing equipment and achieving deep coordinated mixing of stirring and rolling;

[0057] A positioner 5 is provided on one side of the outer circumference of the mixing cylinder 2, and a parking device 6 is provided on one side of the support seat 12. The positioner 5 and the parking device 6 cooperate to stop the mixing cylinder 2 to ensure that the discharge port 7 stops accurately at the preset bottom lowest position; a discharge port 7 is provided on one side of the positioner 5, and the material is discharged from the discharge port 7 after stopping. The design of the position of the discharge port 7 is conducive to the complete and rapid unloading of the material by gravity.

[0058] The mixing rack 1 is a rectangular frame. Several barrel supports 11 are provided on one side of the mixing rack 1. The barrel supports 11 are designed with adjustable height. Several barrel supports 11 are used to place barrels 43 containing different materials. Each barrel support 11 corresponds to an automatic feeding device 41, realizing modular management and convenient replenishment of raw materials.

[0059] The mixing cylinder 2 is a cylindrical structure cylinder, a pair of shaft shoulders 21 extend from both sides of the central axis of the mixing cylinder 2, and the shaft shoulders 21 are integrally cast with the cylinder to ensure coaxiality and strength; the support seat 12 is a trapezoidal structure, and a pair of bearing bushes 13 are provided on the top of the support seat 12, and the bearing bushes 13 are embedded with self-lubricating bearings; the pair of shaft shoulders 21 are assembled in the pair of bearing bushes 13 to form a reliable rotation support point; the outer periphery of the mixing cylinder 2 is wrapped with a sealing ring 22, and a small gap is left between the sealing ring 22 and the outer wall of the cylinder to prevent the material from entering and getting stuck; the inner ring of the mixing cylinder 2 is provided with a number of toggle plates 23, and the toggle plates 2 3 is welded to the inner wall of the cylinder and inclined at a certain angle; the side of the toggle plate 23 contacts the inner side of the sealing ring 22, and scrapes the inner side of the sealing ring 22 during rotation to prevent fine powder from compacting in the gap. At the same time, the toggle plate 23 toggles the material in the mixing cylinder 2 to cause it to tumble; the two sides of the mixing cylinder 2 are rotatably sealed with the two sides of the sealing ring 22, which can keep the sealing ring 22 stationary during the rotation of the mixing cylinder 2, thereby keeping the position of the feeding port and the unloading port 7 stationary. The sealing ring 22 and the mixing sleeve adopt a labyrinth seal or a packing seal to effectively prevent dust leakage and foreign matter from entering.

[0060] The automatic feeding device 41 includes a weighing silo 411, and a high-precision weighing sensor, such as a strain gauge sensor, is installed at the bottom of the weighing silo 411 to monitor the weight changes of the material in the silo in real time; the weighing silo 411 is connected to the bottom end of the barrel and is connected by a flexible hose to avoid vibration interference with weighing; a feeding pipe 412 extends from one side of the weighing silo 411 and is connected to the feeding port of the mixing barrel 2, and the feeding pipe 412 is inserted into the central shaft 421 of the rotating sprinkler 42; a conveying motor 413 is provided on the weighing silo 411, and a threaded feeder 414 is connected to the driving end of the conveying motor 413, and the threaded feeder 414 is assembled in the feeding pipe 412. The conveying motor 413 is specifically a servo motor. According to the preset formula and weighing feedback signal, it accurately controls the speed and start and stop time of the threaded feeder 414, so as to realize quantitative and controllable conveying of each material and ensure accurate proportioning.

[0061] The power assembly 31 includes a power motor 311, which is a three-phase asynchronous motor with variable frequency speed regulation; one side of the power motor 311 is connected to a gear reducer 312, which uses hard-toothed gears with high transmission efficiency and low noise; the output end of the gear reducer 312 is connected to the driving shaft 32, and a shaft seat is provided on the mixing frame 1 to stabilize the driving shaft 32, and a spherical roller bearing is installed in the shaft seat to compensate for installation errors; a rotating ring gear 313 is provided on one side of the mixing cylinder 2, and the rotating ring gear 313 is fixed to the outer periphery of the cylinder by high-strength bolts; a driving gear 314 is provided on the driving shaft 32, and the driving gear 314 is engaged with the rotating ring gear 313. After passing through the reducer, the power motor 311 transmits power to the mixing cylinder 2 smoothly and reliably through the engagement of the drive gear 314 with the rotating ring gear 313, driving it to rotate around the horizontal axis.

[0062] The rotary sprinkler 42 includes a central shaft 421, which is a hollow stainless steel tube. The central shaft 421 is movably mounted on the upper portion of the sealing ring 22 and connected via a sealed bearing to ensure flexible and sealed rotation. The central shaft 421 is provided with a plurality of fly ash holes 422 arranged in a spiral or radial pattern, with adjustable apertures to accommodate materials of varying fluidity. An automatic rotation regulator 423 is provided on the exterior of the central shaft 421.

[0063] The automatic rotation regulator 423 includes a control motor 4231, which is a stepping motor or a servo motor; a control motor 4231 is provided on one side of the central shaft cylinder 421, and the driving end of the control motor 4231 is connected to a rotating worm 4232, and the rotating worm 4232 has a self-locking function; a rotating worm gear 4233 is provided on the outer sleeve of the central shaft cylinder 421 to engage with the rotating worm 4232, and the control motor 4231 drives the rotating worm 4232 to drive the rotating worm gear 4233 engaged with it, thereby driving the central shaft cylinder 421 to rotate at a low speed in the horizontal plane. This rotational motion is combined with the rotation of the cylinder itself, so that the materials entering the central shaft cylinder 421 from each feeding pipe 412 are dynamically and evenly distributed to each flying hole 422 for throwing out, thereby realizing the initial dispersion of the materials in the circumferential direction and axial direction of the cylinder, greatly improving the dispersion uniformity.

[0064] The stirring structure 34 includes a fixed shaft seat 341, which is welded to the inner wall of the mixing cylinder 2; a fixed shaft seat 341 is provided on the inner side of the mixing cylinder 2, and a hybrid shaft 342 is assembled on the fixed shaft seat 341, and the hybrid shaft 342 is installed in the fixed shaft seat 341 through a deep groove ball bearing; the hybrid shaft 342 is arranged along the radial direction of the mixing cylinder 2, and a mixing auger 343 is provided on the outer sleeve of the hybrid shaft 342. The blades of the mixing auger 343 are made of wear-resistant alloy steel, and the pitch and diameter are designed according to the mixing requirements; a drive sleeve 344 is connected between a pair of shoulders 21, and the drive sleeve 344 is an annular structure with a hollow interior, which is movably connected to the shoulders 21 on both sides; one end of the hybrid shaft 342 extends to the drive sleeve 344, and the end of the hybrid shaft 342 extending into the drive sleeve 344 is connected to the power transmitted by the speed control component 35.

[0065] The discharge port 7 is a square-structured opening with a sufficiently large size to facilitate smooth discharge of materials. A sliding-type closed door is provided on the discharge port 7. The closed door is made of a stainless steel plate, and the sliding track is embedded with a wear-resistant bushing. The closed door is electrically controlled and driven by an electric push rod or a cylinder to realize automatic and rapid opening and closing of the discharge port 7, thereby reducing manual intervention and dust emission.

[0066] The parking device 6 includes a parking control motor 61, which is a servo motor with a brake; the parking control motor 61 is installed on the support base 12, and the end of the parking control motor 61 is connected to a parking telescopic rod 62, and the telescopic end of the parking telescopic rod 62 and the fixed end form a shaft key fit; a parking telescopic rod 62 is provided on one side of the support base 12, and a limit screw 63 is connected to the parking telescopic rod 62, which plays a guiding and limiting role; the end of the limit screw 63 is connected to an adjustment card seat 64, and the adjustment card seat 64 corresponds to the positioning sleeve 51; an adjustment hole 65 is provided on the support base 12, and the adjustment hole 65 is threadedly engaged with the limit screw 63; the parking telescopic rod 62 is driven to rotate by the parking control motor 61, and the parking telescopic rod 62 is used to drive the limit screw 63 to rotate, and the limit screw 63 is engaged with the adjustment hole 65, so that the limit screw 63 drives the adjustment card seat 64 to move linearly to meet different parking accuracy requirements;

[0067] The positioner 5 includes a positioning sleeve 51, which is extended on the side wall of the mixing cylinder 2. A positioning spring 52 is installed in the positioning sleeve 51, and the positioning spring 52 provides pre-elastic force; a positioning block 53 is installed in the positioning sleeve 51, and the positioning block 53 can slide in the sleeve, and one end of the positioning block 53 is conical or wedge-shaped to match the positioning spring 52; the positioning block 53 corresponds to the adjustment seat 64. When the mixing cylinder 2 rotates to the point where the discharge port 7 is close to the lowest point, the limiting screw 63 pushes the adjustment seat 64 to be inserted into the positioning sleeve 51, triggering the position signal and locking the cylinder to ensure that the discharge port 7 stops precisely at the lowest position to facilitate complete discharge, and controls the parking motor 61 to drive the parking telescopic rod 62 to drive the adjustment seat 64 to extend / retract, thereby realizing parking locking and unlocking.

[0068] The speed control assembly 35 includes a speed control motor 351; a speed control motor 351 is provided on one side of the support base 12. The speed control motor 351 is a variable frequency motor or a servo motor. The driving end of the speed control motor 351 is connected to a speed control gearbox 352. The speed control gearbox 352 is a planetary gearbox that provides speed reduction and torque increase. The speed control gearbox 352 is connected to an adjustment shaft 353. The adjustment shaft 353 passes through the sealed bearing hole of the support base 12 and the side shoulder 21 and enters the internal space of the drive shaft sleeve 344. The end of the adjustment shaft 353 is connected to a control gear set 354 and is connected to the end of the hybrid shaft 342.

[0069] The control gear set 354 includes a main gear 3541, which is fixed to the end of the adjustment shaft 353, and the end of the hybrid shaft 342 is connected to a sub-gear 3542, which is fixed to the end of the hybrid shaft 342 extending into the drive shaft sleeve 344; the main gear 3541 is meshed with the sub-gear 3542, and each hybrid shaft 342 corresponds to a sub-gear 3542, and all sub-gears 3542 are meshed with the same main gear 3541 to ensure that all stirring structures 34 rotate synchronously and at the same speed; a slot 3543 is provided on the adjustment shaft 353, and the slot 3543 is arranged along the axial direction; an adapter 3544 is connected to the end of the slot 3543, and the adapter 3544 is used to connect the air path; one side of the adapter 3544 is connected to the pulse air pump 33, and the pulse air pump 33 provides intermittent compressed air; the outer ring of several hybrid shafts 342 is provided with There are a number of spray holes 3545, which are distributed axially and circumferentially along the hybrid shaft 342; a number of one-way jet valves are provided on the spray holes 3545, and compressed air enters the slot 3543 of the adjustment shaft 353 through the adapter 3544, serving as an internal air passage, and is then distributed to the air passages inside each hybrid shaft 342 through the adapter 3544, and finally ejected from the one-way jet valve on the spray hole 3545. The pulsed airflow can blow away the fine powder adhering to the auger blades and the cylinder wall, preventing agglomeration and wall adhesion, which is particularly effective for hygroscopic binders or ultrafine powders, further improving mixing uniformity and reducing residue. The speed control motor 351 drives the adjustment shaft 353 to rotate through the gearbox, and then drives all the hybrid shafts 342 and the mixing augers 343 thereon to achieve radial rotation through the engagement of the main and sub gears 3542, and its speed is controlled independently of the cylinder speed.

[0070] Working process: When the silicon carbide rod mixing processing equipment is in operation, first, materials of different types and particle sizes, such as coarse / fine silicon carbide particles, binder solution, etc., are respectively loaded into the material barrel 43 on the barrel bracket 11, and independently measured through the weighing silo 411 of the multi-channel feeder 4. The conveying motor 413 drives the screw feeder 414 to convey the quantitative material through the feeding pipe 412 to the central shaft 421 of the rotating sprinkler 42. At this time, the control motor 4231 drives the rotating worm 4232 to drive the central shaft 421 to rotate, and the material is evenly sprinkled into the mixing cylinder 2 through the flying hole 422 to form an initial dispersion. Then the power assembly 31 is started, and the power motor 311 drives the driving shaft 32 through the gear reducer 312, and drives the mixing cylinder through the driving gear 314 and the rotating gear ring 313. 2 rotates horizontally, and the toggle plate 23 in the barrel rolls, lifts and drops the material to achieve gravity tumbling and mixing. At the same time, the speed control motor 351 drives the adjusting shaft 353 through the speed control gear box 352, and the main and auxiliary gears 3542 engage to drive the mixing shaft 342 to rotate radially. The mixing auger 343 shears and convectively mixes the material. During the mixing process, the intermittent compressed air generated by the pulse air pump 33 is transported to the spray hole 3545 of the mixing shaft 342 through the internal air channel of the adjusting shaft 353, and is blown through the barrel wall and auger blades through the one-way jet valve to prevent fine powder from sticking. When mixing is completed, the parking motor 61 is controlled to drive the limiting screw 63 to move the adjusting seat 64, which cooperates with the positioning block 53 in the positioning pipe sleeve 51 to lock the mixing barrel 2, so that the discharge port 7 is accurately stopped at the lowest position, and the sliding closed door is opened to complete the unloading.

[0071] Working process: When the silicon carbide rod mixing processing equipment is in operation, first, materials of different types and particle sizes, such as coarse / fine silicon carbide particles, binder solution, etc., are loaded into the barrel on the barrel bracket respectively, and independently measured through the weighing silo of the multi-channel feeder. The conveying motor drives the screw feeder to convey the quantitative material through the feeding pipe to the central shaft barrel of the rotating sprinkler. At this time, the control motor drives the rotating worm to drive the central shaft barrel to rotate, and the material is evenly sprinkled into the mixing barrel through the flying hole to form an initial dispersion. Then the power component is started, and the power motor drives the driving shaft through the gear reducer, and the mixing barrel is driven to rotate horizontally by the engagement of the driving gear and the rotating gear ring. , the toggle plate in the barrel rolls the material, lifts it and drops it, realizing gravity tumbling and mixing. At the same time, the speed control motor drives the adjusting shaft through the speed control gear box, and the main and sub gears are engaged to drive the mixing shaft to rotate radially. The mixing auger shears and convectively mixes the material. During the mixing process, the intermittent compressed air generated by the pulse air pump is transported to the mixing shaft spray hole through the internal air channel of the adjusting shaft, and the barrel wall and auger blades are blown through the one-way jet valve to prevent fine powder from sticking. When the mixing is completed, the parking motor is controlled to drive the limit screw to move the adjusting seat, and cooperate with the positioning block in the positioning pipe sleeve to lock the mixing barrel, so that the discharge port is accurately stopped at the lowest position, and the sliding closed door is opened to complete the unloading.

[0072] Example 2: In order to cooperate with the use of the above-mentioned equipment, the present application also discloses a hybrid processing process for silicon carbon rods, comprising the following steps:

[0073] Step 1. Raw material preparation: According to particle size, the raw materials are divided into four categories: coarse silicon carbide (>100 mesh), fine silicon carbide (<325 mesh), silicon powder / dextrin solution as binder, and alumina as sintering aid. They are loaded into the corresponding barrel of the barrel holder respectively. The binder solution needs to be stirred in advance until uniform. The ultrafine powder needs to be passed through a vibrating screen to remove lumps.

[0074] Step 2: Multi-channel quantitative feeding: Based on the formula ratio of coarse:fine = 6:4 and the binder 5wt%, the target weight is input into the weighing silo control system with an error limit of ±0.5%. All automatic feeding devices are activated, and the servo motor drives the screw feeder to deliver the material to the central axis of the rotary sprinkler at a preset speed, ensuring that the four types of materials are fed synchronously or in the order of coarse → fine → binder;

[0075] Step 3: Three-dimensional spreading and dispersion: Control the motor to drive the rotating worm to rotate the central shaft cylinder to meet the dispersion requirements of fine powder and coarse particles. The material is evenly scattered into the cylinder space through the fly hole to avoid accumulation at the entrance, forming a three-dimensional distribution in the axial and circumferential directions.

[0076] Step 4: Bidirectional compound mixing: Start the power motor to drive the mixing cylinder to rotate horizontally at 8-12rpm. The toggle plate lifts the material to a high position and then rolls it down to achieve gravity tumbling mixing. The synchronous speed-controlled motor drives the mixing shaft to rotate radially at 100-150rpm through the main and auxiliary gears. The mixing auger shears and convects the material to break up agglomerations. In the initial stage, the cylinder and the stirring structure rotate in the same direction to enhance material pushing, and in the middle stage, the reverse rotation enhances the dispersion effect.

[0077] Step 5: Pulse airflow to prevent sticking: After mixing for 10 minutes, turn on the pulse air pump, set the compressed air pressure to 0.4-0.6MPa, and deliver it to the spray hole of the hybrid shaft through the air channel inside the regulating shaft. The one-way jet valve intermittently sprays air at a frequency of 1Hz to sweep the cylinder wall and the auger blades to prevent fine powder from sticking. The residual amount is controlled below 0.2%;

[0078] Step 6. Accurate discharge: After mixing is completed, the parking motor is controlled to drive the limit screw to make the adjustment seat cooperate with the positioning ring sleeve, lock the cylinder to the lowest position of the discharge port, and the angle error is less than 2°. The electric push rod opens the sliding closed door, and the material is completely discharged by gravity. The discharge time is less than 3 minutes, and there is no dust leakage.

[0079] Step 7, quality inspection: Take samples after discharge and use laser particle size analyzer to detect particle size distribution. The D50 deviation is <5μm. Combined with XRF to detect elemental composition, the formula deviation is <0.3%.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mixing processing device for silicon carbon rods, comprising a mixing frame (1), wherein the mixing frame (1) is a rectangular frame, a mixing cylinder (2) is provided on the mixing frame (1), and the mixing cylinder (2) is arranged in a horizontal structure, characterized in that: An integrated mixer (3) is provided on the mixing cylinder (2), and a multi-channel feeder (4) is provided on the integrated mixer (3); The multi-channel feeder (4) is composed of a plurality of automatic feeding devices (41) arranged in a ring on the integrated mixer (3), and the plurality of automatic feeding devices (41) respectively contain materials of different types and different particle sizes. The automatic feeding devices (41) quantitatively transport the materials into the mixing cylinder (2). The mixing cylinder (2) is provided with a rotating sprinkler (42) connected to the multi-channel feeder (4), and the materials entering from the multi-channel feeder (4) are dispersed by the sprinkler effect. The integrated mixer (3) comprises a power assembly (31), the power assembly (31) being arranged on one side of the mixing cylinder (2), a driving shaft (32) extending from the power assembly (31), the driving shaft (32) being linked to the mixing cylinder (2), a plurality of stirring structures (34) being arranged in an inner ring of the mixing cylinder (2), the power assembly (31) being used as a power basis, the power assembly (31) driving the mixing cylinder (2) to rotate via the driving shaft (32), the mixing cylinder (2) rotating about a horizontal axis, and the material being stirred during the rotation of the mixing cylinder (2); The integrated mixer (3) further comprises a support seat (12), wherein the support seat (12) is arranged on the mixing frame (1), the support seat (12) is movably connected to the mixing cylinder (2), a speed control component (35) is arranged on the support seat (12), the speed control component (35) is linked with a plurality of stirring structures (34), the support seat (12) supports the mixing cylinder (2), so that the mixing cylinder (2) can perform horizontal rotational movement, and then the speed control component (35) on the support seat (12) is linked with a plurality of stirring structures (34) in the mixing cylinder (2), and the stirring structures (34) rotate in the radial direction of the mixing cylinder (2), thereby further mixing and stirring the materials; A positioner (5) is provided on one side of the outer circumference of the mixing cylinder (2), and a stopper (6) is provided on one side of the support seat (12). The positioner (5) cooperates with the stopper (6) to stop the mixing cylinder (2). A discharge port (7) is provided on one side of the positioner (5), and materials are discharged from the discharge port (7) after stopping.

2. The mixing processing equipment for silicon carbon rods according to claim 1, characterized in that: The mixing frame (1) is a rectangular frame. A plurality of barrel supports (11) are provided on one side of the mixing frame (1). The barrel supports (11) are used to place barrels (43) containing different materials.

3. The mixing processing equipment for silicon carbon rods according to claim 2, characterized in that: The mixing cylinder (2) is a cylinder with a cylindrical structure. A pair of shaft shoulders (21) extend from both sides of the central axis of the mixing cylinder (2). The support seat (12) is a trapezoidal structure. A pair of bearings (13) are provided on the top of the support seat (12). The pair of shaft shoulders (21) are assembled in the pair of bearings (13). A sealing ring (22) is provided around the outer periphery of the mixing cylinder (2). A plurality of toggle plates (23) are provided on the inner ring of the mixing cylinder (2). The side edges of the toggle plates (23) are in contact with the inner side of the sealing ring (22). The two sides of the mixing cylinder (2) are rotatably sealed with the two sides of the sealing ring (22).

4. The mixing processing equipment for silicon carbon rods according to claim 3, characterized in that: The automatic feeding device (41) includes a weighing silo (411), the weighing silo (411) is connected to the bottom end of the barrel, a feeding pipe (412) extends from one side of the weighing silo (411) and is connected to the feeding port of the mixing barrel (2), a conveying motor (413) is provided on the weighing silo (411), a threaded feeder (414) is connected to the driving end of the conveying motor (413), and the threaded feeder (414) is assembled in the feeding pipe (412).

5. The mixing processing equipment for silicon carbon rods according to claim 4, characterized in that: The power assembly (31) includes a power motor (311), one side of the power motor (311) is connected to a gear reducer (312), the output end of the gear reducer (312) is connected to the driving shaft (32), a shaft seat is provided on the mixing frame (1) to stabilize the driving shaft (32), a rotating ring gear (313) is provided on one side of the mixing cylinder (2), a driving gear (314) is provided on the driving shaft (32), and the driving gear (314) is meshed with the rotating ring gear (313).

6. The mixing processing equipment for silicon carbon rods according to claim 5, characterized in that: The rotary sprinkler (42) includes a central shaft cylinder (421), which is movably mounted on the upper portion of the blocking ring sleeve (22). A plurality of fly material holes (422) are provided on the upper ring of the central shaft cylinder (421), and an automatic rotation regulator (423) is provided on the outside of the central shaft cylinder (421).

7. The mixing processing equipment for silicon carbon rods according to claim 6, characterized in that: The stirring structure (34) includes a fixed shaft seat (341), the fixed shaft seat (341) is provided on the inner side of the mixing cylinder (2), a mixing shaft (342) is mounted on the fixed shaft seat (341), the mixing shaft (342) is arranged along the radial direction of the mixing cylinder (2), a mixing auger (343) is provided on the outer shell of the mixing shaft (342), a driving shaft sleeve (344) is connected between a pair of the shaft shoulders (21), and one end of the mixing shaft (342) extends to the driving shaft sleeve (344).

8. The mixing processing equipment for silicon carbon rods according to claim 7, characterized in that: The discharge port (7) is an opening of a square structure, and a closed door of a sliding structure is provided on the discharge port (7), and the closed door is opened and closed by an electric control.

9. The mixing processing equipment for silicon carbon rods according to claim 8, characterized in that: The speed control assembly (35) includes a speed control motor (351). The speed control motor (351) is provided on one side of the support seat (12). The driving end of the speed control motor (351) is connected to a speed control gear box (352). The speed control gear box (352) is connected to an adjustment shaft (353). The adjustment shaft (353) is inserted from a shaft shoulder (21) on one side. The end of the adjustment shaft (353) is connected to a control gear set (354) and is connected to the end of the hybrid shaft (342).

10. A mixing process for silicon carbon rods, applied to the mixing process equipment for silicon carbon rods according to any one of claims 1 to 9, characterized in that: The process includes the following steps: Step 1, raw material preparation; Step 2, multi-channel quantitative feeding; Step 3, three-dimensional spreading and dispersion; Step 4, two-way compound mixing; Step 5, pulse airflow anti-sticking; Step 6, precise material discharge; Step 7, quality inspection; Step 1. Raw material preparation: According to particle size, the raw materials are divided into four categories: coarse silicon carbide (>100 mesh), fine silicon carbide (<325 mesh), silicon powder / dextrin solution as binder, and alumina as sintering aid. They are loaded into the corresponding barrel of the barrel holder respectively. The binder solution needs to be stirred in advance until uniform. The ultrafine powder needs to be passed through a vibrating screen to remove lumps. Step 2: Multi-channel quantitative feeding: Based on the formula ratio of coarse:fine = 6:4 and the binder 5wt%, the target weight is input into the weighing silo control system with an error limit of ±0.5%. All automatic feeding devices are activated, and the servo motor drives the screw feeder to deliver the material to the central axis of the rotary sprinkler at a preset speed, ensuring that the four types of materials are fed synchronously or in the order of coarse → fine → binder; Step 3: Three-dimensional spreading and dispersion: Control the motor to drive the rotating worm to rotate the central shaft cylinder to meet the dispersion requirements of fine powder and coarse particles. The material is evenly scattered into the cylinder space through the fly hole to avoid accumulation at the entrance, forming a three-dimensional distribution in the axial and circumferential directions. Step 4: Bidirectional compound mixing: Start the power motor to drive the mixing cylinder to rotate horizontally at 8-12rpm. The toggle plate lifts the material to a high position and then rolls it down to achieve gravity tumbling mixing. The synchronous speed-controlled motor drives the mixing shaft to rotate radially at 100-150rpm through the main and auxiliary gears. The mixing auger shears and convects the material to break up agglomerations. In the initial stage, the cylinder and the stirring structure rotate in the same direction to enhance material pushing, and in the middle stage, the reverse rotation enhances the dispersion effect. Step 5: Pulse airflow to prevent sticking: After mixing for 10 minutes, turn on the pulse air pump, set the compressed air pressure to 0.4-0.6MPa, and deliver it to the spray hole of the hybrid shaft through the air channel inside the regulating shaft. The one-way jet valve intermittently sprays air at a frequency of 1Hz to sweep the cylinder wall and the auger blades to prevent fine powder from sticking. The residual amount is controlled below 0.2%; Step 6. Accurate discharge: After mixing is completed, the parking motor is controlled to drive the limit screw to make the adjustment seat cooperate with the positioning ring sleeve, lock the cylinder to the lowest position of the discharge port, and the angle error is less than 2°. The electric push rod opens the sliding closed door, and the material is completely discharged by gravity. The discharge time is less than 3 minutes, and there is no dust leakage. Step 7, quality inspection: Take samples after discharge and use laser particle size analyzer to detect particle size distribution. The D50 deviation is <5μm. Combined with XRF to detect elemental composition, the formula deviation is <0.3%.

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