Boron nitride presintered material crushing device

Abstract

The invention relates to the technical field of material crushing, and particularly discloses a boron nitride presintered material crushing device. The problem that the proportion of qualified powder in powder subjected to secondary smashing is large due to the fact that too many presintered materials are smashed through opposite rollers at a time is solved. Comprising a fixed shell, a guide shell and a filter plate are fixedly connected in the fixed shell, and two crushing rollers are rotatably connected in the fixed shell; the two supporting plates are fixedly connected to the interior of the fixed shell, and the two supporting plates are jointly and rotationally connected with a rotating cylinder; and the separating plate is connected to the lower portion of the material guiding shell in a sliding mode, the separating plate is connected with a limiting block in a sliding mode, and the limiting block is matched with the material guiding shell in an extrusion mode. Through rotation of the rotating cylinder and intermittent reciprocating movement of the separating plate, the material guiding shell injects pre-sintered materials in multiple batches, the purpose of controlling the amount of material powder screened by the filtering plate at a time is achieved, the proportion of qualified powder in secondarily-smashed material powder is reduced, and it is guaranteed that the powder size distribution of a final product is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of material crushing, and in particular discloses a boron nitride pre-burned material crushing device. Background Art

[0002] Boron nitride (BN) is an advanced material with excellent properties. It is widely used in many fields due to its high thermal conductivity, good electrical insulation and high chemical stability. The preparation process of boron nitride products is usually to mix boron nitride powder with other additives and then press it into shape, followed by pre-sintering to remove organic matter and impurities. The pre-sintered material needs to be further crushed to achieve the required particle size, and then qualified powder is screened out through screening, and unqualified material powder needs to be re-crushed.

[0003] The existing boron nitride pre-sintered material pulverizing device usually pours all the pre-sintered materials between the rollers for pulverization during operation, and then screens them through the screen. However, this unified pulverizing method will cause the rollers to bear a high load, which will increase the proportion of unqualified material powder in the large amount of material powder processed by the rollers, and the unqualified powder needs to be pulverized for the second time. At the same time, the large amount of material powder will cause the screen to bear a large load during screening, so that the proportion of qualified material powder in the material powder screened by the screen for the second pulverization is large. The qualified powder is repeatedly pulverized together with the unqualified material powder, resulting in the particle size of some powders being lower than the qualified range. This situation not only increases energy consumption and production costs, but also leads to uneven particle size distribution of the final product, thereby affecting the quality and performance of the boron nitride product. Summary of the invention

[0004] In order to solve the problem that too much pre-burned material is crushed in a single time by opposing rollers, resulting in a large proportion of qualified powder in the powder for secondary crushing, the present invention provides a boron nitride pre-burned material crushing device.

[0005] The technical solution is: a boron nitride pre-burned material crushing device, comprising: a fixed shell, the upper side of the fixed shell is fixedly connected to the pre-burning device, the fixed shell is fixedly connected to a material guide shell and a filter plate, the fixed shell is rotatably connected to two crushing rollers, the filter plate is provided with filter holes, and the lower part of the fixed shell is slidably connected to a drawer; two support plates are both fixed to the fixed shell, the two support plates are rotatably connected to a rotating cylinder, the rotating cylinder is in contact with the material guide shell, and the material guide shell is provided with filter holes and rectangular holes; a separation plate is slidably connected to the lower part of the material guide shell, the A tension spring is fixedly connected between the separation plate and the material guide shell, the separation plate is sealed with the material guide shell, the separation plate is slidably connected to a limit block, a spring is fixedly connected between the limit block and the separation plate, the limit block is extruded with the rotating cylinder, and is used to control the material guide shell to discharge intermittently; a power mechanism is arranged on the fixed shell, and is used to provide power for the crushing and screening of materials; a circulation mechanism is arranged in the fixed shell, and is used to repeatedly crush unqualified material powder; an auxiliary unloading mechanism is arranged in the rotating cylinder, and is used to assist the repeated crushing operation of materials.

[0006] As a preferred embodiment of the present invention, the limit block is provided with a slope, the slope of the limit block is extruded and matched with the separation plate, the number of rectangular holes on the material guide shell is an odd number and is evenly distributed circumferentially, the separation plate is configured as an arc-shaped plate, the center of the separation plate is located on the rotation axis of the rotating cylinder, the separation plate fits and slides with the rotating cylinder, and is used to prevent the material in the material guide shell from falling.

[0007] As a preferred embodiment of the present invention, the power mechanism includes: a first motor, fixedly connected to the fixed shell, the output shaft of the first motor and any one of the crushing rollers are transmitted via a belt and a pulley, and the two crushing rollers are transmitted via a gear set; a second motor, fixedly connected to the fixed shell, the output shaft of the second motor and the rotating cylinder are transmitted via gears and a gear ring.

[0008] As a preferred embodiment of the present invention, the circulation mechanism includes: two rotating shafts, which are rotatably connected in the fixed shell, the rotating shaft on one side is provided with a sleeve, and the rotating shaft and the sleeve on the other side jointly mount a conveyor belt, and two through holes are provided in the middle part of the fixed shell, and the weight transmitted by the conveyor belt is monitored by the relative rotation angle between the rotating shaft and the sleeve; U-shaped plates distributed at intervals are arranged on the conveyor belt for temporarily storing the material powder screened by the separation plate; a third motor is fixedly connected to the fixed shell, and the output shaft of the third motor is fixedly connected to the rotating shaft on one side; a unloading assembly is arranged on the fixed shell, and is used to push the material powder on the U-shaped plate into the material guide shell.

[0009] As a preferred embodiment of the present invention, the distance between two adjacent U-shaped plates is equal to the distance between two through holes in the fixed shell.

[0010] As a preferred embodiment of the present invention, the unloading assembly includes: an electric push rod, which is fixedly connected to the fixed shell, and the telescopic end of the electric push rod is fixedly connected to a lever, and the lever is slidably connected to the fixed shell; a push plate, which is limitedly slidably connected to the U-shaped plate, and a spring is fixedly connected between the U-shaped plate and the push plate, and the push plate is squeezed and matched with the lever, so as to accurately push the material powder in the U-shaped plate into the material guide shell through the through hole of the fixed shell.

[0011] As a preferred embodiment of the present invention, the auxiliary unloading mechanism includes: a plurality of fixed plates, the number of which is twice the number of the rectangular holes on the material guide shell, all of which are fixedly connected to the rotating cylinder, and are used to cooperate with the rotation of the rotating cylinder so that the material powder at the bottom of the rotating cylinder is transferred back to between the two crushing rollers; a rotating roller, which is rotatably connected to one end of the separation plate, and the side wall of the fixed shell is provided with an arc groove, and the rotating roller slides in the arc groove of the fixed shell, and one end of the rotating roller is fixedly connected to a gear, and a rack is fixedly connected to the arc groove of the fixed shell, and the gear is meshed with the rack, and is used to make the rotating roller rotate when the separation plate moves, and the auxiliary material is separated at the rectangular hole of the rotating cylinder to prevent the rotating cylinder from being limited by the material.

[0012] As a preferred embodiment of the present invention, the auxiliary unloading mechanism also includes: a mirror-distributed material guide plate, which is fixed in the fixed shell, and the facing surfaces of the mirror-distributed material guide plates are set as inclined surfaces, and the spacing between the inclined surfaces of the mirror-distributed material guide plates gradually decreases from top to bottom, and the inclined surface of the material guide plate is used to assist the material to enter between the two crushing rollers.

[0013] As a preferred embodiment of the present invention, the fixed plates are in an inclined state, and the inclination direction of the plurality of fixed plates from outside to inside is the same as the rotation direction of the rotating drum, and are used to store unqualified material powder screened out by the rotating drum.

[0014] As a preferred embodiment of the present invention, it also includes: a crushing adjustment mechanism, which is arranged on the rotating shaft on one side, and is used to control the amount of material injected by the material guide shell between the two crushing rollers at a time. The crushing adjustment mechanism includes: a first hydraulic cylinder, which is rotatably connected to the rotating shaft on one side, and the output shaft of the first hydraulic cylinder is rotatably connected to the sleeve. A cavity is arranged at one end of the rotating shaft, and the rotating shaft on one side is rotatably connected to the sleeve. A spring is fixed between the rotating shaft and the sleeve, and the first hydraulic cylinder is connected to the corresponding cavity in the rotating shaft through a pipeline. The weight of the material on the conveyor belt is monitored according to the relative rotation angle between the sleeve and the rotating shaft; a sliding A block is limitedly slidably connected to the rotating shaft on one side, a spring is fixedly connected between the sliding block and the rotating shaft, and a pressure sensing sheet which is extruded and matched with the sleeve is arranged on the sliding block; a guide pipe is rotatably connected to the rotating shaft on the lower side, the guide pipe is communicated with the corresponding inner cavity of the rotating shaft, the guide pipe is fixedly connected to the fixed shell and the material guide shell, a second hydraulic cylinder is fixedly connected to the material guide shell, the second hydraulic cylinder is communicated with the guide pipe, the telescopic end of the second hydraulic cylinder is extruded and matched with the separation plate through a support rod, so as to limit the moving range of the separation plate, and the first hydraulic cylinder, the inner cavity of the rotating shaft, the guide pipe and the second hydraulic cylinder are all filled with hydraulic oil.

[0015] The present invention has the following advantages: 1. The present invention rotates the rotating drum and combines the intermittent reciprocating movement of the separation plate to inject pre-burned materials into the material guide shell in batches, thereby achieving the purpose of controlling the amount of material powder screened by the filter plate at a single time, reducing the proportion of qualified powder in the secondary crushed material powder, and ensuring that the powder particle size distribution of the final product is uniform.

[0016] 2. The present invention uses a conveyor belt in a circulation mechanism to drive the U-shaped plate to circulate, combined with the movement of a push plate, to complete the transfer and secondary crushing of unqualified material powder, thereby ensuring the efficiency of the device in crushing the pre-burned boron nitride material.

[0017] 3. The present invention uses the gear in the auxiliary unloading mechanism to drive the rotating roller to move, and the auxiliary separation plate completes the separation of materials between the material guide shell and the rotating cylinder, preventing the material from hindering the rotation of the rotating cylinder during the intermittent discharge of the material guide shell, thereby ensuring the safety of the working parts in the device.

[0018] 4. The present invention monitors the relative rotation angle between the rotating shaft and the sleeve by the first hydraulic cylinder, controls the initial position of the separation plate, reduces the total amount of material crushed by the crushing roller at a single time, reduces the load of the crushing roller, and ensures the quality of the material powder produced by the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the parts in the fixed shell of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the parts of the support plate and the rotating cylinder of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the parts of the crushing roller and the rotating drum of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the rotating roller and gear parts of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the parts of the gear and rack of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the parts of the second motor and the third motor of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the parts of the shifting rod and the push plate of the present invention; Fig. 9 It is a cross-sectional view of the parts of the rotating shaft and the sleeve of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the parts of the first hydraulic cylinder and the guide pipe of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the initial position of the parts at the sliding block of the present invention.

[0020] Figure numbers: 1-fixed shell, 2-pre-burning device, 3-material guide shell, 4-crushing roller, 5-filter plate, 6-drawer, 7-support plate, 8-rotating cylinder, 9-separation plate, 10-limiting block, 201-first motor, 202-second motor, 301-rotating shaft, 302-sleeve, 303-conveyor belt, 304-U-shaped plate, 305-third motor, 401-electric push rod, 402-shift rod, 403-push plate, 501-fixed plate, 502-rotating roller, 503-gear, 504-rack, 601-material guide plate, 701-first hydraulic cylinder, 702-guide pipe, 703-sliding block, 704-second hydraulic cylinder. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1 -Attached Fig.11 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] Example 1: During operation, the existing pulverizing device for pre-burned boron nitride materials will uniformly pulverize the pre-burned materials, resulting in a large amount of powder accumulating on the sieve. If the unqualified material powder is pulverized for the second time, the qualified powder will account for a large proportion of the secondary pulverized material powder, causing the particle size of some powders to be lower than the qualified range, resulting in uneven particle size distribution of the final product, thereby affecting the quality and performance of the boron nitride product.

[0023] A boron nitride pre-burned material crushing device, please refer to the attached Figure 1 -Attached Figure 5 and attached Figure 7 As shown, it comprises: a fixed shell 1, a pre-burning device 2 is fixedly connected to the upper side of the fixed shell 1, a material guide shell 3 and a filter plate 5 are fixedly connected in the fixed shell 1, two crushing rollers 4 are rotatably connected in the fixed shell 1, filter holes are arranged on the filter plate 5, and a drawer 6 is slidably connected to the lower part of the fixed shell 1; two support plates 7 are both fixedly connected in the fixed shell 1, and the two support plates 7 are rotatably connected to a rotating cylinder 8, the rotating cylinder 8 is in contact with the material guide shell 3, and filter holes and rectangular holes are arranged on the material guide shell 3; a separation plate 9 is slidably connected to the lower part of the material guide shell 3, a tension spring is fixedly connected between the separation plate 9 and the material guide shell 3, the separation plate 9 is sealed with the material guide shell 3, the separation plate 9 is slidably connected to a limiting block 10, a spring is fixedly connected between the limiting block 10 and the separation plate 9, and the limiting block 10 is pressed and matched with the rotating cylinder 8 to control the intermittent discharge of the material guide shell 3; a power mechanism is arranged on the fixed shell 1 to provide material crushing and screening Power; a circulation mechanism, arranged in the fixed shell 1, for repeatedly crushing the unqualified material powder; an auxiliary unloading mechanism, arranged in the rotating drum 8, for assisting the repeated crushing operation of the material, a slope is arranged on the limit block 10, and the slope of the limit block 10 is squeezed and matched with the separation plate 9, the number of rectangular holes on the guide shell 3 is an odd number and is evenly distributed circumferentially, the separation plate 9 is arranged as an arc-shaped plate, the center of the separation plate 9 is located on the rotation axis of the rotating drum 8, the separation plate 9 fits and slides with the rotating drum 8 to prevent the material in the guide shell 3 from falling, and the power mechanism includes: a first motor 201, fixedly connected to the fixed shell 1, the output shaft of the first motor 201 and any crushing roller 4 are driven by a belt and a pulley, and the two crushing rollers 4 are driven by a gear set; a second motor 202, fixedly connected to the fixed shell 1, the output shaft of the second motor 202 and the rotating drum 8 are driven by a gear and a gear ring.

[0024] In the above scheme, it is intended to solve the problem that the excessive amount of pre-burned boron nitride material crushed in a single time will increase the crushing load of the crushing roller 4, increase the proportion of unqualified material powder in the processed material powder, and increase the screening load of the filter plate 5, resulting in a large proportion of qualified powder in the secondary crushed material powder. There is a partition in the middle of the fixed shell 1, and the fixed shell 1 is divided into two left and right chambers. The two through holes in the fixed shell 1 are both located on its partition. The filter plate 5 is tilted from top to bottom to the right. The right end of the filter plate 5 is aligned with the through hole at the bottom of the partition of the fixed shell 1. The aperture of the filter hole on the rotating cylinder 8 is the same as the aperture of the filter hole on the filter plate 5. The filter holes on the rotating cylinder 8 and the separation plate 9 are used to screen out material powder with unqualified particle size. A control panel is provided on the fixed shell 1, and a heat preservation device is provided in the material guide shell 3 to ensure the temperature of the pre-burned material during crushing. A vibration device is provided on the filter plate 5 (which is an existing mechanism used to assist the filter plate 5 in screening the material powder, not shown in the figure). , the pre-burning device 2, the heat preservation device and the power mechanism are all electrically connected to the control panel, the inner side of the support plate 7 is in contact with the rotating cylinder 8, the distance between the lower ends of the two support plates 7 is greater than the width of the rectangular hole on the rotating cylinder 8, the width of the rectangular hole on the rotating cylinder 8 is the same as the width of the separation plate 9, the number of rectangular holes on the rotating cylinder 8 is three, the limit block 10 is provided with an inclined surface inclined to the left from top to bottom, the two crushing rollers 4 are located directly below the guide shell 3, so that the material falls directly between the two crushing rollers 4, the side of the filter plate 5 is in contact with the left chamber of the fixed shell 1 to prevent unqualified material powder from entering the drawer 6, the elastic coefficient of the spring connected to the limit block 10 is greater than the elastic coefficient of the tension spring connected to the separation plate 9, and the separation plate 9 intermittently blocks the guide shell 3, so that the pre-burned material enters between the two crushing rollers 4 in batches, reducing the total amount of material powder falling on the filter plate 5, and reducing the proportion of qualified material powder in the secondary crushed material powder, so that the particle size distribution of the final product is uniform, and the quality and performance of the boron nitride product are guaranteed.

[0025] Workflow: First, the operator puts the boron nitride material into the pre-burning device 2, and then the operator starts the pre-burning device 2, the insulation device, the vibration device, the first motor 201 and the second motor 202 through the control panel. The output shaft of the first motor 201 drives the left crushing roller 4 to rotate clockwise (from front to back) through the belt and the pulley, and the two crushing rollers 4 rotate synchronously in opposite directions through the gear 503 group. The output shaft of the second motor 202 drives the rotating cylinder 8 to rotate counterclockwise (from front to back) through the gear 503 and the ring gear. After the pre-burning device 2 is started, the boron nitride material therein is pre-burned. When the pre-burning of the boron nitride material is completed, the pre-burning device 2 conveys the pre-burned boron nitride material therein into the fixed shell 1, and the pre-burned boron nitride material enters the material guide shell 3 and is stacked. The insulation device in the material guide shell 3 ensures that the temperature of the pre-burned boron nitride material is stable.

[0026] During the rotation of the rotating cylinder 8, when the rectangular hole of the rotating cylinder 8 is connected with the material guide shell 3, part of the material in the material guide shell 3 enters the rotating cylinder 8 through the corresponding rectangular hole, and the edge of the rectangular hole of the rotating cylinder 8 contacts the inclined surface of the extrusion limit block 10. The limit block 10 drives the separation plate 9 to move with the rotating cylinder 8. The separation plate 9 stretches the tension spring connected to it, and the separation plate 9 gradually blocks the material guide shell 3. When the separation plate 9 moves to the limit position, it stops moving. The edge of the rectangular hole of the rotating cylinder 8 squeezes the inclined surface of the limit block 10. The inclined surface of the limit block 10 moves into the separation plate 9 and compresses the connected spring. The separation plate 9 separates the material through the auxiliary unloading mechanism to prevent the material from being stuck at the joint between the rectangular hole of the rotating cylinder 8 and the material guide shell 3. The rectangular hole of the rotating cylinder 8 loses contact with the limit block 10, and the separation plate 9 moves and resets under the tension of the connected tension spring, thereby completing the addition of boron nitride pre-burned material.

[0027] When a single batch of materials enters the rotating drum 8, the materials fall between the two crushing rollers 4. The two crushing rollers 4 rotate in opposite directions to crush the materials. The material powder falls to the lower part of the rotating drum 8. The material powder close to the qualified range falls on the filter plate 5 through the filter holes of the rotating drum 8. Some unqualified material particles re-enter between the two crushing rollers 4 for crushing through the rotation of the rotating drum 8 and the auxiliary feeding mechanism. Only the part of the material powder with qualified particle size passes through the filter holes of the filter plate 5 into the drawer 6 for accumulation. The filter plate 5 transports the unqualified material powder to the circulation mechanism through the through holes on the lower side of the partition of the fixed shell 1. The qualified material powder falls into the drawer 6 through the filter plate 5. During the rotation of the rotating drum 8, when the rotating drum 8 When the rectangular hole is aligned with the material guide shell 3, the limit block 10 extends under the elastic force of the connected spring, and the material guide shell 3 injects a batch of boron nitride pre-burned materials into the rotating cylinder 8 again to perform the above-mentioned crushing and screening operations. When all the materials in the material guide shell 3 are discharged, the circulation mechanism re-injects the unqualified material powder into the material guide shell 3 through the through hole on the upper side of the partition of the fixed shell 1, repeats the above-mentioned material crushing and screening operations, and performs secondary crushing. At this point, the crushing operation of the boron nitride pre-burned materials is completed, the drawer 6 is pulled out, and the crushed material powder is taken away. Finally, the operator turns off the pre-burning device 2, the insulation device in the material guide shell 3, the vibration device, the first motor 201 and the second motor 202 through the control panel, and all parts are restored to their initial positions.

[0028] Please refer to the attached Figure 2 , Attachment Figure 7 and attached Figure 8As shown, the circulation mechanism includes: two rotating shafts 301, which are rotatably connected to the fixed shell 1, and the rotating shaft 301 on one side is provided with a sleeve 302, and the rotating shaft 301 and the sleeve 302 on the other side jointly set up a conveyor belt 303, and two through holes are provided in the middle of the fixed shell 1, and the weight transmitted by the conveyor belt 303 is monitored through the relative rotation angle of the rotating shaft 301 and the sleeve 302; U-shaped plates 304 distributed at intervals are arranged on the conveyor belt 303, and are used for temporarily storing the material powder screened by the separation plate 9; a third motor 305, which is fixed to the fixed shell 1, and the output shaft of the third motor 305 is connected to the rotating shaft 30 on one side. 1 is fixed; a discharging assembly is arranged on the fixed shell 1, and is used to push the material powder on the U-shaped plate 304 into the material guide shell 3, and the distance between two adjacent U-shaped plates 304 is equal to the distance between the two through holes in the fixed shell 1. The discharging assembly includes: an electric push rod 401, which is fixed to the fixed shell 1, and the telescopic end of the electric push rod 401 is fixedly connected with a lever 402, and the lever 402 is slidably connected to the fixed shell 1; a push plate 403, which is limitedly slidably connected to the U-shaped plate 304, and a spring is fixedly connected between the U-shaped plate 304 and the push plate 403, and the push plate 403 is squeezed and matched with the lever 402, and is used to accurately push the material powder in the U-shaped plate 304 into the material guide shell 3 through the through hole of the fixed shell 1.

[0029] In the above case, the purpose is to collect and transport the unqualified material powder again, so as to achieve the purpose of secondary crushing of the unqualified material powder. Taking the U-shaped plate 304 on the left as an example, the U-shaped plate 304 slides in contact with the partition of the fixed shell 1, so that all the unqualified material powder screened by the filter plate 5 enters the U-shaped plate 304, and the position of the electric push rod 401 is flush with the through hole on the upper side of the inner partition of the fixed shell 1. When the lever 402 and the push plate 403 are squeezed and matched, the inner bottom surface of the U-shaped plate 304 is flush with the lower side surface of the through hole on the upper side of the inner partition of the fixed shell 1. The outer diameter of the upper rotating shaft 301 and the sleeve 302 are the same, so that the left side of the conveyor belt 303 is parallel to the inner partition of the fixed shell 1. The length of the push plate 403 in the front and rear directions is equal to the length of the through hole on the inner partition of the fixed shell 1. The U-shaped plate 304 is driven to move by the conveyor belt 303. Combined with the movement of the push plate 403, the unqualified material powder screened by the filter plate 5 is transferred for secondary crushing, thereby ensuring the effect of crushing the pre-burned boron nitride material by the device.

[0030] Working process: After the material powder screened by the rotating drum 8 falls onto the filter plate 5, the qualified powder particles fall into the drawer 6 through the filter plate 5, and the unqualified powder particles move into the U-shaped plate 304 along the inclined surface of the filter plate 5 and the through hole on the lower side of the partition in the fixed shell 1. When all the materials in the guide shell 3 are crushed, the control panel starts the third motor 305, and the output shaft of the third motor 305 drives the lower rotating shaft 301 to rotate. The rotating shaft 301 drives the conveyor belt 303 to rotate clockwise (from front to back) through the sleeve 302, and the U-shaped plate 304 drives the unqualified material powder to move upward, and the U-shaped plate 304 is crushed. When the bottom surface is flush with the lower side surface of the through hole on the upper side of the inner partition of the fixed shell 1, the control panel turns off the third motor 305 and starts the electric push rod 401. The telescopic end of the electric push rod 401 drives the lever 402 to move to the left. The lever 402 contacts and squeezes the push plate 403. The push plate 403 moves to the left and compresses the connected spring. The push plate 403 pushes the material in the corresponding U-shaped plate 304 into the material guide shell 3 through the through hole on the upper side of the inner partition of the fixed shell 1. The above-mentioned crushing operation is repeated, and the unqualified material powder is crushed for the second time. At this point, the processing of the unqualified material is completed, and the qualified material powder finally falls into the drawer 6 for storage.

[0031] Please refer to the attached Figure 1 -Attached Figure 6 As shown, the auxiliary unloading mechanism includes: a plurality of fixed plates 501, the number of which is twice the number of rectangular holes on the guide shell 3, all of which are fixedly connected to the rotating cylinder 8, and are used to cooperate with the rotation of the rotating cylinder 8 so that the material powder at the bottom of the rotating cylinder 8 is transferred back to between the two crushing rollers 4; a rotating roller 502, which is rotatably connected to one end of the separation plate 9, and the side wall of the fixed shell 1 is provided with an arc groove, and the rotating roller 502 slides in the arc groove of the fixed shell 1, and one end of the rotating roller 502 is fixedly connected to a gear 503, and the arc groove of the fixed shell 1 is fixedly connected to a rack 504, and the gear 503 is meshed with the rack 504, and is used to make the rotating roller 502 rotate when the separation plate 9 moves. 502 rotates, and the auxiliary materials are separated at the rectangular hole of the rotating cylinder 8 to prevent the rotating cylinder 8 from being limited by the materials. The auxiliary unloading mechanism also includes: a mirror-distributed guide plate 601, which is fixed in the fixed shell 1, and the facing surfaces of the mirror-distributed guide plates 601 are set as inclined surfaces. The spacing between the inclined surfaces of the mirror-distributed guide plates 601 gradually decreases from top to bottom. The inclined surface of the guide plate 601 is used to assist the materials to enter between the two crushing rollers 4. The fixed plate 501 is in an inclined state, and the inclination direction of the multiple fixed plates 501 from outside to inside is the same as the rotation direction of the rotating cylinder 8, and is used to store the unqualified material powder screened by the rotating cylinder 8.

[0032] In the above scheme, the problem that materials are easily stuck between the rectangular holes of the rotating cylinder 8 and the material guide shell 3 during the process of releasing the materials in the material guide shell 3 in batches is solved. There are six fixed plates 501, and the six fixed plates 501 are evenly distributed in the circumferential direction of the rotating cylinder 8. The three rectangular holes on the rotating cylinder 8 and the six fixed plates 501 are staggered. The rectangular holes of each rotating cylinder 8 are directly opposite to the filter holes between the other two rectangular holes on the rotating cylinder 8, so that the crushed material powder is directly filtered by the filter holes of the rotating cylinder 8, and the material powder with unqualified particle size is screened out to facilitate repeated crushing, thereby ensuring the comprehensiveness of the crushing of the boron nitride pre-burned material by the device. The surface of the rotating roller 502 is set to a rough surface, which is used to separate the boron nitride pre-burned material at the connection between the material guide shell 3 and the rotating cylinder 8.

[0033] Working process: During the rotation of the rotating drum 8, the rotating drum 8 drives the fixed plate 501 to move synchronously. When the rotating drum 8 drives the separation plate 9 to move through the limit block 10, the separation plate 9 drives the rotating roller 502 to move synchronously. Since the gear 503 and the rack 504 are meshed with each other, as the rotating roller 502 drives the gear 503 to move, the rotating roller 502 at the left end of the separation plate 9 rotates continuously clockwise (from front to back). The rotating roller 502 separates the materials between the material guide shell 3 and the rotating drum 8 to prevent the rectangular hole of the rotating drum 8 from being stuck by the materials when it is misaligned with the material guide shell 3, thereby ensuring the stable operation of the parts in the device and the materials falling on the lower part of the rotating drum 8 are crushed. Finally, qualified material powder passes through the filter holes of the rotating drum 8, and some unqualified material powder is screened out by the rotating drum 8. As the rotating drum 8 rotates, the fixed plate 501 drives the unqualified material powder to move upward. When the fixed plate 501 moves to the upper part of the rotating drum 8, the fixed plate 501 tilts to the left from top to bottom, and the unqualified material powder is guided by the two guide plates 601 to re-enter between the two crushing rollers 4 for crushing. After the boron nitride pre-burned material is crushed by the crushing roller 4, it is distinguished by the filter plate 5 and the rotating drum 8 as qualified material powder and unqualified material powder, and is crushed separately to ensure the efficiency of crushing the pre-burned material of this device.

[0034] When the rectangular hole of the rotating cylinder 8 loses contact with the limit block 10, the separation plate 9 moves and resets under the tension of the connected tension spring. Since the gear 503 is engaged with the rack 504, the rotating roller 502 rotates in the opposite direction. In the process of the pre-burned material in the guide shell 3 entering the rotating cylinder 8, the two guide plates 601 guide the material, assisting the two crushing rollers 4 to quickly complete the crushing operation of the pre-burned material.

[0035] In the above embodiment, the connection relationship between the rotating shaft 301 and the sleeve 302 can be regarded as a fixed connection. However, in the following embodiments, the connection relationship between the rotating shaft 301 and the sleeve 302 is a limited rotation connection.

[0036] Example 2: Based on Example 1, please refer to the attached Figure 1 , Attachment Figure 3 , Attachment Figure 5 and attached Fig. 9 -Attached Fig.11 As shown, it also includes: a crushing adjustment mechanism, which is arranged on the rotating shaft 301 on one side, and is used to control the amount of material injected by the guide shell 3 between the two crushing rollers 4 at a time. The crushing adjustment mechanism includes: a first hydraulic cylinder 701, which is rotatably connected to the rotating shaft 301 on one side, and the output shaft of the first hydraulic cylinder 701 is rotatably connected to the sleeve 302. A cavity is arranged at one end of the rotating shaft 301, and the rotating shaft 301 on one side is rotatably connected to the sleeve 302. A spring is fixed between the rotating shaft 301 and the sleeve 302. The first hydraulic cylinder 701 is connected to the corresponding cavity in the rotating shaft 301 through a pipeline. According to the relative rotation angle between the sleeve 302 and the rotating shaft 301, the weight of the material on the conveyor belt 303 is monitored; a sliding block 703, which limits the rotation of the sleeve 302 and the rotating shaft 301. It is slidably connected to the rotating shaft 301 on one side, a spring is fixedly connected between the sliding block 703 and the rotating shaft 301, and a pressure sensing sheet which is squeezed and matched with the sleeve 302 is arranged on the sliding block 703; the guide tube 702 is rotatably connected to the rotating shaft 301 on the lower side, the guide tube 702 is communicated with the corresponding inner cavity of the rotating shaft 301, the guide tube 702 is fixedly connected to the fixed shell 1 and the material guide shell 3, a second hydraulic cylinder 704 is fixedly connected in the material guide shell 3, the second hydraulic cylinder 704 is communicated with the guide tube 702, the telescopic end of the second hydraulic cylinder 704 is squeezed and matched with the separation plate 9 through the support rod, so as to limit the moving range of the separation plate 9, and the first hydraulic cylinder 701, the inner cavity of the rotating shaft 301, the guide tube 702 and the second hydraulic cylinder 704 are all filled with hydraulic oil.

[0037] In the above scheme, the purpose is to solve the problem that if the filter holes on the filter plate 5 are blocked, the screening efficiency of the filter plate 5 will be reduced, resulting in an increase in the proportion of qualified powder in the secondary crushed material powder. The first hydraulic cylinder 701 is located in front of the lower rotating shaft 301, and the pipe connected to the first hydraulic cylinder 701 is an elastic hose, which is convenient for the first hydraulic cylinder 701 to perform hydraulic oil transmission operations during the rotation of the first hydraulic cylinder 701. The first hydraulic cylinder 701 monitors the relative rotation angle of the rotating shaft 301 and the sleeve 302 to control the initial position of the separation plate 9, so that the device can still control the proportion of qualified powder in the secondary crushed material powder when the filter holes on the filter plate 5 are blocked, thereby ensuring the quality of the material powder produced by the device.

[0038] Working process: When the filter plate 5 conveys the unqualified material powder into the U-shaped plate 304 on the lower left side, the weight of the U-shaped plate 304 increases. At this time, the U-shaped plate 304 drives the conveyor belt 303 to rotate counterclockwise (from front to back), and the sleeve 302 rotates counterclockwise (from front to back) relative to the lower rotating shaft 301. The spring between the sleeve 302 and the corresponding rotating shaft 301 is compressed, and the telescopic end of the first hydraulic cylinder 701 is pulled out. The hydraulic oil in the first hydraulic cylinder 701 enters the second hydraulic cylinder 704 through the pipeline, the cavity in the corresponding rotating shaft 301 and the guide pipe 702. The telescopic end of the second hydraulic cylinder 704 contracts, but the support rod of the telescopic end of the second hydraulic cylinder 704 does not contact the separation plate 9, and the above-mentioned crushing and secondary crushing operations of the pre-burned material are repeated. When the material powder in the U-shaped plate 304 is pushed out, the sleeve 302 rotates and resets under the elastic force of the connected spring, and the hydraulic oil in the guide tube 702 flows in the reverse direction. The telescopic end of the second hydraulic cylinder 704 extends and resets. During the operation of this device, unqualified material powder will block the filter holes on the filter plate 5, resulting in an increase in material powder entering the lower left U-shaped plate 304, and the sleeve 302 is relative to the lower rotating shaft 30 1 The rotation angle increases. At this time, the sleeve 302 contacts and squeezes the pressure sensing sheet on the sliding block 703. The control panel increases the power of the vibration device to dredge the blocked filter holes on the filter plate 5 through vibration. After the vibration device is started for a period of time, the initial power is restored. If the blocked filter holes on the filter plate 5 cannot be dredged, the blockage degree of the filter holes on the filter plate 5 increases with the use of the device. The weight of the U-shaped plate 304 increases, the rotation angle of the sleeve 302 increases, the sleeve 302 drives the sliding block 703 to move and compress the connected spring, the retraction distance of the telescopic end of the second hydraulic cylinder 704 increases, and the second hydraulic The support rod at the telescopic end of the cylinder 704 contacts and pushes the separation plate 9 to move, thereby blocking part of the material guide shell 3 in advance, reducing the amount of a single batch of materials entering the rotating cylinder 8, and increasing the proportion of qualified powder in the material powder produced by the crushing roller 4, reducing the screening load of the filter plate 5, and ensuring the proportion of qualified powder in the secondary crushed material powder. When the pressure sensing sheet on the sliding block 703 is subjected to a certain degree of pressure, the control panel actively turns off the pre-burning device 2, the insulation device in the material guide shell 3, the first motor 201 and the second motor 202 until the operator manually clears the filter plate 5, and the related parts are restored to their initial positions.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A boron nitride pre-burned material crushing device, characterized in that: include: A fixed shell (1), the upper side of the fixed shell (1) being fixedly connected to a pre-burning device (2), the fixed shell (1) having a material guide shell (3) and a filter plate (5) fixedly connected inside the fixed shell (1), two crushing rollers (4) being rotatably connected inside the fixed shell (1), the filter plate (5) being provided with filter holes, and the lower part of the fixed shell (1) being slidably connected to a drawer (6); Two support plates (7) are both fixedly connected to the fixed shell (1); the two support plates (7) are rotatably connected to a rotating cylinder (8); the rotating cylinder (8) is in contact with the material guide shell (3); and the material guide shell (3) is provided with filter holes and rectangular holes; A separation plate (9) is slidably connected to the lower part of the material guide shell (3), a tension spring is fixedly connected between the separation plate (9) and the material guide shell (3), the separation plate (9) and the material guide shell (3) are blocked and matched, the separation plate (9) is slidably connected to a limit block (10), a spring is fixedly connected between the limit block (10) and the separation plate (9), the limit block (10) is pressed and matched with the rotating cylinder (8), and is used to control the material guide shell (3) to perform intermittent material discharge; A power mechanism, arranged on the fixed shell (1), for providing power for crushing and screening of materials; A circulation mechanism, arranged in the fixed shell (1), for repeatedly crushing unqualified material powder; The auxiliary material discharge mechanism is arranged on the rotating drum (8) and is used to assist the repeated crushing operation of the material.

2. The boron nitride pre-burned material crushing device according to claim 1 is characterized in that: The limit block (10) is provided with an inclined surface, the inclined surface of the limit block (10) is pressed and matched with the separation plate (9), the number of rectangular holes on the material guide shell (3) is an odd number and is evenly distributed in the circumferential direction, the separation plate (9) is provided as an arc-shaped plate, the center of the separation plate (9) is located on the rotation axis of the rotating cylinder (8), and the separation plate (9) and the rotating cylinder (8) are fitted and slidable to prevent the material in the material guide shell (3) from falling.

3. The boron nitride pre-burned material crushing device according to claim 2 is characterized in that: The power mechanism comprises: A first motor (201) is fixedly connected to the fixed shell (1); the output shaft of the first motor (201) is driven by a belt and a pulley to any one of the crushing rollers (4); and the two crushing rollers (4) are driven by a gear set; The second motor (202) is fixedly connected to the fixed housing (1), and the output shaft of the second motor (202) is transmitted to the rotating cylinder (8) via a gear and a gear ring.

4. The boron nitride pre-burned material pulverizing device according to claim 3 is characterized in that: The circulation mechanism comprises: Two rotating shafts (301) are rotatably connected in the fixed shell (1); the rotating shaft (301) on one side is provided with a sleeve (302); the rotating shaft (301) and the sleeve (302) on the other side are jointly provided with a conveyor belt (303); two through holes are provided in the middle of the fixed shell (1); and the weight conveyed by the conveyor belt (303) is monitored by the relative rotation angle between the rotating shaft (301) and the sleeve (302); U-shaped plates (304) distributed at intervals are arranged on the conveyor belt (303) and are used to temporarily store the material powder screened by the separation plate (9); A third motor (305) is fixedly connected to the fixed housing (1), and an output shaft of the third motor (305) is fixedly connected to the rotating shaft (301) on one side; A material discharge assembly is arranged on the fixed shell (1) and is used to push the material powder on the U-shaped plate (304) into the material guide shell (3).

5. The boron nitride pre-burned material pulverizing device according to claim 4, characterized in that: The distance between two adjacent U-shaped plates (304) is equal to the distance between two through holes in the fixed shell (1).

6. The boron nitride pre-burned material pulverizing device according to claim 5, characterized in that: The unloading assembly comprises: An electric push rod (401) is fixedly connected to the fixed shell (1), a telescopic end of the electric push rod (401) is fixedly connected to a lever (402), and the lever (402) is slidably connected to the fixed shell (1); A push plate (403) is connected to the U-shaped plate (304) in a limited sliding manner, a spring is fixedly connected between the U-shaped plate (304) and the push plate (403), and the push plate (403) is pressed and matched with the lever (402) to accurately push the material powder in the U-shaped plate (304) into the material guide shell (3) through the through hole of the fixed shell (1).

7. The boron nitride pre-burned material pulverizing device according to claim 6, characterized in that: The auxiliary unloading mechanism comprises: a plurality of fixed plates (501), the number of which is twice the number of the rectangular holes on the material guide shell (3), which are all fixedly connected to the rotating cylinder (8) and are used to cooperate with the rotation of the rotating cylinder (8) so that the material powder at the bottom of the rotating cylinder (8) is transferred back to between the two crushing rollers (4); A rotating roller (502) is rotatably connected to one end of the separation plate (9); an arc-shaped groove is provided on the side wall of the fixed shell (1); the rotating roller (502) slides in the arc-shaped groove of the fixed shell (1); a gear (503) is fixedly connected to one end of the rotating roller (502); a rack (504) is fixedly connected to the arc-shaped groove of the fixed shell (1); the gear (503) meshes with the rack (504) to rotate the rotating roller (502) when the separation plate (9) moves, thereby assisting the separation of materials at the rectangular hole of the rotating cylinder (8) and preventing the rotating cylinder (8) from being limited by the materials.

8. The boron nitride pre-burned material pulverizing device according to claim 7, characterized in that: The auxiliary unloading mechanism also includes: The mirror-distributed material guide plates (601) are fixedly connected in the fixed shell (1); the facing surfaces of the mirror-distributed material guide plates (601) are arranged as inclined surfaces; the spacing between the inclined surfaces of the mirror-distributed material guide plates (601) gradually decreases from top to bottom; the inclined surfaces of the material guide plates (601) are used to assist materials to enter between the two crushing rollers (4).

9. The boron nitride pre-burned material pulverizing device according to claim 8, characterized in that: The fixed plates (501) are in an inclined state, and the inclination direction of the plurality of fixed plates (501) from outside to inside is the same as the rotation direction of the rotating drum (8), and are used to store unqualified material powder screened by the rotating drum (8).

10. The device for crushing the pre-burned boron nitride material according to claim 8, characterized in that: include: A crushing adjustment mechanism is arranged on the rotating shaft (301) on one side and is used to control the amount of material that the material guide shell (3) injects between the two crushing rollers (4) at a time. The crushing adjustment mechanism comprises: A first hydraulic cylinder (701) is rotatably connected to the rotating shaft (301) on one side, an output shaft of the first hydraulic cylinder (701) is rotatably connected to the sleeve (302), one end of the rotating shaft (301) is provided with a cavity, the rotating shaft (301) on one side is rotatably connected to the sleeve (302), a spring is fixedly connected between the rotating shaft (301) and the sleeve (302), the first hydraulic cylinder (701) is connected to the corresponding cavity in the rotating shaft (301) through a pipeline, and the weight of the material on the conveyor belt (303) is monitored according to the relative rotation angle between the sleeve (302) and the rotating shaft (301); A sliding block (703) is connected to the rotating shaft (301) on one side in a limited sliding manner, a spring is fixedly connected between the sliding block (703) and the rotating shaft (301), and a pressure sensing sheet that is pressed and matched with the sleeve (302) is provided on the sliding block (703); A flow guide pipe (702) is rotatably connected to the rotating shaft (301) at the lower side, the flow guide pipe (702) is communicated with the corresponding inner cavity of the rotating shaft (301), the flow guide pipe (702) is fixedly connected to the fixed shell (1) and the material guide shell (3), a second hydraulic cylinder (704) is fixedly connected to the material guide shell (3), the second hydraulic cylinder (704) is communicated with the flow guide pipe (702), the telescopic end of the second hydraulic cylinder (704) is pressed and matched with the separation plate (9) through a support rod, and is used to limit the movement range of the separation plate (9), and the first hydraulic cylinder (701), the inner cavity of the rotating shaft (301), the flow guide pipe (702) and the second hydraulic cylinder (704) are all filled with hydraulic oil.

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