Nail disc crusher

Abstract

The invention relates to the technical field of crushers, in particular to a nail disc crusher. The nail disc pulverizer comprises a control box, a feeding and pulverizing device installed on the control box, a feeding device used for feeding the feeding and pulverizing device, a material barrel of the nail disc pulverizer connected to the feeding and pulverizing device, and a dust removal device communicated with the top of the material barrel through a pipeline. The nail disc pulverizer has the beneficial effects that performance balance can be achieved, and the dust removal problem can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of crushers, and in particular to a nail plate crusher. Background Art

[0002] In the pharmaceutical manufacturing industry, the drug pulverization process is a critical step, directly impacting drug quality, efficacy, and safety. With the continuous advancement of pharmaceutical technology, the requirements for drug pulverization precision are becoming increasingly stringent. Precise pulverization can achieve the desired particle size, helping to improve drug dissolution rate and bioavailability, ensuring that the drug can function more quickly and effectively in the body.

[0003] However, the current pharmaceutical crushing field faces two major thorny problems.

[0004] First, there is the problem of balancing the performance of the pulverizer. Among the existing pharmaceutical pulverizing equipment, high-efficiency pulverizers often find it difficult to meet high-precision requirements. Some equipment designed with the intention of improving pulverization efficiency, such as some machines that use high-speed rotating blades for pulverization, can process a large amount of pharmaceutical raw materials in a short period of time, but their pulverization process is relatively extensive. Since the cutting force and angle of the blade and the movement trajectory of the material in the pulverizing chamber are difficult to control accurately, the particle size distribution range of the pulverized drug particles is relatively wide and cannot meet strict precision standards. This will not only affect the stability and uniformity of the drug, but may also cause uneven content of the drug during the preparation process, which will have a serious impact on the quality of the drug.

[0005] In contrast, grinders that meet precision requirements generally have low grinding efficiency. For example, some devices that use a pestle and mortar for fine grinding can grind drug particles to a particle size that meets precision standards through slow and meticulous grinding. However, this method processes very small amounts of material each time, and the grinding process is time-consuming, severely limiting production efficiency. In the context of large-scale pharmaceutical production, this inefficient grinding method will undoubtedly significantly increase production costs, reduce the company's production efficiency, and make it difficult to meet market demand for pharmaceutical supply.

[0006] Secondly, dust issues pose numerous challenges to pharmaceutical pulverization. During the pulverization process, both high-efficiency and high-precision pulverizers inevitably generate large amounts of dust. This dust not only seriously pollutes the production environment, affecting workshop air quality and endangering the health of operators, but long-term inhalation can also lead to occupational diseases such as pneumoconiosis. Furthermore, dust can pose quality risks to pharmaceuticals. Firstly, airborne pharmaceutical dust can easily adhere to equipment surfaces and packaging materials, causing cross-contamination of pharmaceuticals. Secondly, if dust is not properly handled, it can enter the final pharmaceutical preparation, altering the dosage accuracy and affecting the efficacy and safety of the drug. Furthermore, under certain conditions, dust can create a flammable and explosive environment, posing a serious safety hazard to the production workshop. Summary of the Invention

[0007] In order to solve the problems of performance balance and dust, the present application provides a nail disc crusher.

[0008] The present application provides a nail plate crusher, which adopts the following technical solution: A nail plate crusher includes a control box, a feed crushing device mounted on the control box, a feeding device for feeding the feed crushing device, a material barrel of the nail plate crusher connected to the feed crushing device, and a dust removal device connected to the top of the material barrel through a pipeline; The feed crushing device includes a crushing shell with a crushing chamber provided therein, a fixed nail plate provided in the crushing shell, and a rotating nail plate rotatably installed in the crushing chamber via a rotating shaft; the fixed nail plate is provided with fixed nail teeth, and the rotating nail plate is provided with rotating nail teeth, the fixed nail plate and the rotating nail plate are arranged opposite to each other, and the fixed nail teeth and the rotating nail teeth are staggered in the radial direction; The dust removal device includes a dust removal cylinder, a cyclone cylinder arranged below the dust removal cylinder, a collecting cylinder connected to the bottom of the cyclone cylinder, and a dust collection bag arranged in the dust removal cylinder. The bottom of the dust removal cylinder is provided with an air inlet inserted downward into the cyclone cylinder, the side wall of the dust removal cylinder is provided with an air outlet, and the cyclone cylinder is provided with a feed port connected to the material cylinder; the dust collection bag is spaced apart from the inner wall of the dust removal cylinder, and the bottom of the dust collection bag is connected to the air inlet of the dust removal cylinder.

[0009] In one embodiment: the fixed nail plate is provided with a plurality of first annular protrusions, the fixed nail teeth are provided on the first annular protrusions, and a gap is set between the end of the fixed nail teeth and the end face of the rotating nail plate; the rotating nail plate is provided with a plurality of second annular protrusions, the rotating nail teeth are provided on the second annular protrusions, and a gap is set between the end of the rotating nail teeth and the end face of the fixed nail teeth.

[0010] In one embodiment, a liquid nitrogen inlet is provided on the feed pipe; and a first cooling cavity, a second cooling cavity and a third cooling cavity are respectively provided on the front, back and side of the pulverizing shell.

[0011] In one embodiment, the feed port is eccentrically arranged on the cyclone, and the air inlet is arranged in an inverted cone shape.

[0012] In one embodiment, a lifting drive member connected to the dust bag is provided on the top of the dust removal cylinder.

[0013] In one embodiment, a heat dissipation cavity is provided in the control box, a drive motor is installed in the heat dissipation cavity, and the drive motor is connected to the feed crushing device through a high-speed bearing box; a heat dissipation structure is provided on the heat dissipation cavity.

[0014] In one embodiment, the high-speed bearing box includes a rotating shaft for connecting the drive motor and the rotating nail plate, a bearing box body disposed outside the rotating shaft, a plurality of bearings disposed between the rotating shaft and the bearing box body, and a grinder rear cover and a docking end cover respectively connected to both ends of the bearing box body, the docking end cover being connected to the control box, and the bearing box body, the grinder rear cover and the docking end cover being spaced apart from the rotating shaft; An air intake channel is provided on the bearing housing, the grinder rear cover and the docking end cover. The air intake channel forms an air outlet on the inner wall of the grinder rear cover and an air intake on the end surface of the docking end cover. A first one-way valve structure and a second one-way valve structure are provided on the inner side of the grinder rear cover. The first one-way valve structure and the second one-way valve structure are respectively provided on both sides of the air outlet.

[0015] In one embodiment, the inner wall of the rear cover of the grinder, the first one-way valve structure and the second one-way valve structure form a heat-equalizing chamber, and a heat-conducting plate is provided on the rotating shaft.

[0016] In one embodiment, a plurality of heat dissipation fins are provided on the outer circle of the heat conducting plate, and a plurality of heat dissipation holes are provided through the heat conducting plate.

[0017] In one embodiment: the first one-way valve structure includes a first mounting block installed on the end of the grinder rear cover away from the bearing housing, a first clamping block installed on the first mounting block, and a first sealing plate clamped between the first mounting block and the first clamping block, and the inner diameter of the first sealing plate is smaller than the outer diameter of the corresponding position of the bearing; the second one-way valve structure includes a second mounting block installed on the end of the grinder rear cover facing the bearing housing, a second clamping block installed on the second mounting block, and a second sealing plate clamped between the second mounting block and the second clamping block, and the inner diameter of the second sealing plate is smaller than the outer diameter of the corresponding position of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the nail plate crusher of this embodiment; Figure 2 Schematic diagram of the internal structure of the nail plate crusher of this embodiment; Figure 3 This is a schematic structural diagram of the high-speed bearing box in the nail disc crusher of this embodiment; Figure 4 This is a main sectional view of the high-speed bearing box in the nail disc crusher of this embodiment; Figure 5 This is a partial enlarged view of the high-speed bearing box in the nail disc crusher of this embodiment; Figure 6 Schematic diagram of the structure of the feed crushing device in the nail plate crusher of this embodiment; Figure 7 This is a main cross-sectional view of the feed crushing device in the nail disc crusher of this embodiment; Figure 8 This is a schematic structural diagram of the front cover of the feed crushing device in the nail plate crusher of this embodiment; Figure 9 This is a schematic structural diagram of the front cover and the rotating nail plate of the feed crushing device in the nail plate crusher of this embodiment; Figure 10 Schematic diagram of the structure of the dust removal device in the nail plate crusher of this embodiment; Figure 11 This is a main cross-sectional view of the dust removal device in the nail disc crusher of this embodiment; Figure 12 It is a partial structural diagram of the dust removal device in the nail disc crusher of this embodiment.

[0019] In the figure, 100, feed crushing device; 110, crushing shell; 111, crushing chamber; 112, feed pipe; 113, liquid nitrogen inlet; 114, air port; 115, discharge pipe; 120, fixed nail plate; 121, first annular protrusion; 122, fixed nail teeth; 130, rotating nail plate; 131, second annular protrusion; 132, rotating nail teeth; 140, double swing arm structure; 141, first swing arm; 142, second swing arm; 150, first cooling chamber; 151, first connection port; 160, second cooling chamber; 161, second connection port; 170, third cooling chamber; 171, third connection port; 200, control box; 210, heat dissipation chamber; 300, feeding device; 400, high-speed bearing housing; 410, rotating shaft; 420, bearing housing; 421, air intake passage; 430, bearing; 440, grinder rear cover; 441, heat dissipation opening; 442 , air outlet; 450, docking end cover; 451, air inlet; 460, first one-way valve structure; 461, first mounting block; 462, first clamping block; 463, first sealing sheet; 470, second one-way valve structure; 471, second mounting block; 472, second clamping block; 473, second sealing sheet; 480, heat dissipation chamber; 490, heat conducting plate; 491, heat dissipation fins; 492, heat dissipation holes; 500, dust removal device; 5 10. Movable bracket; 511. Movable roller; 520. Suction element; 530. Dust collector; 531. Air outlet; 532. Air inlet; 540. Cyclone; 541. Feed port; 550. Collecting barrel; 560. Dust bag; 570. Lifting drive member; 580. Bottom plate; 581. Connecting section; 582. Connecting flange; 583. Connecting convex ring; 590. Clamp; 600. Material barrel; 700. Drive motor. DETAILED DESCRIPTION

[0020] The present application is further described in detail below with reference to the accompanying drawings.

[0021] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0022] A nail plate crusher, such as Figure 1 and Figure 2 As shown, it includes a control box 200, a feed crushing device 100, a feeding device 300, a material barrel 600 and a dust removal device 500.

[0023] The control box 200 has a heat dissipation chamber 210, which houses the drive motor 700. The drive motor 700 is connected to the feed crushing device 100 via the high-speed bearing housing 400. The heat dissipation chamber 210 includes a heat dissipation structure, which consists of a cooling fan mounted on the side wall of the control box 200 and arranged in a grid-like pattern at the bottom of the control box 200 to dissipate heat from the drive motor 700 and the high-speed bearing housing 400.

[0024] like Figure 3 and Figure 4 As shown, the high-speed bearing box 400 includes a rotating shaft 410, a bearing box body 420, a bearing 430, a grinder rear cover 440 and a docking end cover 450.

[0025] One end of the rotating shaft 410 is connected to the driving motor 700 , and the other end is connected to the rotating nail plate 130 of the feeding and crushing device 100 .

[0026] The bearing housing 420 is disposed outside the rotating shaft 410 . A plurality of bearings 430 are provided. In this embodiment, three bearings 430 are provided. The inner ring of the bearing 430 is connected to the rotating shaft 410 , and the outer ring is connected to the bearing housing 420 .

[0027] The grinder rear cover 440 and the docking end cover 450 are respectively fixedly installed on the two ends of the bearing housing 420 by bolts. The bearing housing 420, the grinder rear cover 440 and the docking end cover 450 are spaced apart from the rotating shaft 410 through the bearing 430, and a heat dissipation opening 441 is formed between the docking end cover 450 and the rotating shaft 410. The heat dissipation opening 441 is connected to the heat dissipation cavity 210. The gap formed by the interval can be used for heat dissipation of the rotating shaft 410 and the bearing 430, thereby effectively improving the heat dissipation effect.

[0028] The bearing housing 420, the grinder rear cover 440, and the docking end cover 450 are provided with an air inlet channel 421. Preferably, multiple air inlet channels 421 are provided, but two are used in this embodiment. The air inlet channel 421 forms an air outlet 442 on the inner wall of the grinder rear cover 440 and an air inlet 451 on the end surface of the docking end cover 450.

[0029] A first one-way valve structure 460 and a second one-way valve structure 470 are provided on the inner side of the grinder rear cover 440 . The first one-way valve structure 460 and the second one-way valve structure 470 are respectively provided on both sides of the air outlet 442 .

[0030] Reference Figure 5 The first one-way valve structure 460 includes a first mounting block 461 mounted on the end of the grinder rear cover 440 away from the bearing housing 420, a first clamping block 462 mounted on the first mounting block 461, and a first sealing piece 463 clamped between the first mounting block 461 and the first clamping block 462.

[0031] To ensure a seal, the inner diameter of the first sealing sheet 463 is smaller than the outer diameter of the corresponding portion of the bearing 430. To ensure that the first sealing sheet 463 tilts toward the end of the grinder rear cover 440 away from the bearing housing 420, thereby forming a one-way seal, the inner diameter of the first clamping block 462 is smaller than that of the first mounting block 461. Furthermore, to ensure that airflow can flow into the nail plate, that is, between the first clamping block 462 and the bearing 430, the first clamping block 462 is larger than the outer diameter of the corresponding portion of the bearing 430.

[0032] The second one-way valve structure 470 includes a second mounting block 471 mounted on the end of the grinder rear cover 440 facing the bearing housing 420 , a second clamping block 472 mounted on the second mounting block 471 , and a second sealing sheet 473 clamped between the second mounting block 471 and the second clamping block 472 .

[0033] To ensure a seal, the inner diameter of the second sealing sheet 473 is smaller than the outer diameter of the corresponding portion of the bearing 430. To ensure that the second sealing sheet 473 can tilt toward the end of the grinder rear cover 440 that faces the bearing housing 420, thereby forming a one-way seal, the inner diameter of the second clamping block 472 is smaller than the inner diameter of the first mounting block 461. Furthermore, to ensure that airflow can enter the gap between the bearing housing 420 and the bearing 430 and be blown out through the heat dissipation opening 441, that is, to ensure that airflow can pass between the second clamping block 472 and the bearing 430, the second clamping block 472 is larger than the outer diameter of the corresponding portion of the bearing 430.

[0034] A heat-dissipating chamber 480 is formed around the inner wall of the grinder rear cover 440 , the first one-way valve structure 460 and the second one-way valve structure 470 . A heat-dissipating plate 490 is installed on the rotating shaft 410 to enhance heat dissipation of the rotating shaft 410 .

[0035] The outer circle of the heat conducting plate 490 is provided with a plurality of heat dissipation fins 491 , which are arranged at equal intervals along the axial direction. In this embodiment, there are three heat dissipation fins 491 , and a plurality of penetrating heat dissipation holes 492 are provided on the heat conducting plate 490 .

[0036] like Figure 6 and Figure 7 As shown, the feed pulverizing device 100 includes a pulverizing shell 110 , a fixed spike plate 120 and a rotating spike plate 130 .

[0037] The pulverizing shell 110 is circular in shape as a whole, and a pulverizing chamber 111 is provided therein. A feed pipe 112 is connected to the center of the front cover of the pulverizing shell 110 , and the other end of the feed pipe 112 is bent and extends upward.

[0038] A liquid nitrogen inlet 113 and an air port 114 are provided on the feed pipe 112. The liquid nitrogen inlet 113 is arranged horizontally and coaxially with the rotating shaft 410. The liquid nitrogen inlet 113 is used to introduce liquid nitrogen to cool the pulverized material and the pulverizing device. The air port 114 is used to balance the negative pressure in the feed pipe 112.

[0039] A discharge pipe 115 communicating with the pulverizing chamber 111 is provided at the lower end of the pulverizing shell 110 . The discharge pipe 115 is detachably connected to the material barrel 600 .

[0040] Reference Figure 8 The inner wall of the front cover of the pulverizing shell 110 protrudes inward to form the above-mentioned fixed nail plate 120, and the feed pipe 112 is connected to the middle position of the fixed nail plate 120. The fixed nail plate 120 is provided with a plurality of first annular protrusions 121, and the end surface of each first annular protrusion 121 is evenly spaced with fixed nail teeth 122.

[0041] Reference Figure 6 and 9 On the back of the crushing shell 110 is the crusher rear cover 440, and the shaft extends through the crusher rear cover 440 and is inserted into the crushing chamber 111 and fixedly connected to the rotating nail plate 130. The rotating nail plate 130 and the fixed nail plate 120 are both circular structures and are arranged opposite to each other.

[0042] The rotating spike plate 130 is provided with a plurality of second annular protrusions 131, each of which has rotating spike teeth 132 evenly spaced on its end surface. The first annular protrusions 121 and the second annular protrusions 131 are staggered in the radial direction, so that the fixed spike teeth 122 and the rotating spike teeth 132 are also staggered in the radial direction.

[0043] The first annular protrusion 121 creates a gap between the end of the rotating spike 132 and the end face of the fixed spike 122. The second annular protrusion 131 creates a gap between the end of the fixed spike 122 and the end face of the rotating spike plate 130. These gaps allow granular material to enter the gaps during pulverization, extending the pulverization time between the rotating spike plate 130 and the fixed spike plate 120. They also pulverize material in the gaps, effectively improving pulverization accuracy.

[0044] Among them, such as Figure 6 As shown, in order to facilitate cleaning of the pulverizing chamber 111 , the front cover of the pulverizing shell 110 is detachable. Specifically, the front cover of the pulverizing shell 110 is connected to the pulverizing shell 110 by a plurality of bolts.

[0045] Furthermore, to facilitate disassembly and cleaning, the front cover and the pulverizing housing 110 are connected by a dual swing arm structure 140. This dual swing arm structure 140 comprises a first swing arm 141, which is pivotally connected to the front cover, and a second swing arm 142, which is pivotally connected to the pulverizing housing 110. The first and second swing arms 141, 142 are pivotally connected. This dual swing arm structure 140 allows the front cover to be removed and then moved horizontally to separate the fixed and rotating spike plates 120, 130. After separation, the plates can be rotated open for easy cleaning.

[0046] like Figure 6 and Figure 7 As shown, in order to further improve the cooling effect of the pulverizing chamber 111 , three cooling chambers are provided on the pulverizing shell 110 .

[0047] Specifically, a first cooling cavity 150 is provided on the front cover of the pulverizing shell 110, and at least two first connecting ports 151 are provided on the first cooling cavity 150. The first cooling cavity 150 is used to cool the fixed nail plate 120 and the feed pipe 112, and the multiple first connecting ports 151 are used for the inlet and outlet of cooling liquid respectively.

[0048] A second cooling chamber 160 is provided at one end of the pulverizing shell 110 connected to the rotating shaft 410. The second cooling chamber 160 is provided with at least two second connection ports 161. The second cooling chamber 160 is used to cool the pulverizer rear cover 440. The plurality of second connection ports 161 are respectively used for the inlet and outlet of coolant.

[0049] A third cooling cavity 170 is provided on the outer circumference of the pulverizing shell 110. The third cooling cavity 170 is provided with at least two third connection ports 171. The third cooling cavity 170 is used to cool the outer circumferential wall of the pulverizing chamber 111. The third connection ports 171 are respectively used for the inlet and outlet of cooling liquid.

[0050] Among them, when adding the coolant, it is preferably done in a top-in and bottom-out manner.

[0051] like Figure 1 and 2 As shown, the feeding device 300 is a spiral feeding structure, on which a conical barrel for storing granular materials is provided.

[0052] like Figure 10 and Figure 11 As shown, the dust removal device 500 includes a movable bracket 510, an air suction element 520, a dust removal cylinder 530, a cyclone cylinder 540, a collecting cylinder 550, a dust removal bag 560 and a lifting drive member 570.

[0053] Four movable rollers 511 are provided at the bottom of the movable bracket 510 to facilitate its movement.

[0054] The dust collecting cylinder 530 is cylindrical, with a closed upper end and an open lower end. The bottom of the dust collecting cylinder 530 is connected to a bottom plate 580 , which is fixedly mounted on the movable bracket 510 .

[0055] The bottom plate 580 is provided with a connecting section 581 detachably connected to the dust collecting cylinder 530 . In this embodiment, the bottom plate 580 and the dust collecting cylinder 530 are connected via a clamp 590 .

[0056] Reference Figure 11 and Figure 12 The bottom plate 580 extends into the dust collection tube 530 to form a connecting flange 582. The lower end of the dust bag 560 is connected to the connecting flange 582. The connecting flange 582 and the dust bag 560 are both located inside the dust collection tube 530. To facilitate the installation of the dust bag 560, the height of the connecting flange 582 is greater than the height of the connecting wall of the bottom plate 580 and the dust collection tube 530.

[0057] The lifting drive 570 is located at the top of the dust collection cylinder 530. The lifting drive 570 is a hydraulic cylinder or a pneumatic cylinder. The top of the dust bag 560 is connected to the lifting rod of the lifting drive 570. The lifting rod of the lifting drive 570 is extended and retracted to shake the dust bag 560, thereby reducing the problem of dust bag 560 being blocked.

[0058] In addition, in order to make the connection between the connecting flange 582 and the dust bag 560 more secure, an outwardly protruding connecting protrusion ring 583 is provided at the end opening of the connecting flange 582. The connecting protrusion ring 583 can form a limit, effectively preventing the dust bag 560 from detaching.

[0059] The dust bag 560 is spaced from the inner wall of the dust collecting cylinder 530, and an air outlet 531 is provided on the side wall of the dust collecting cylinder 530. The air outlet 531 is located at the top of the dust collecting cylinder 530, preferably at the top of the dust bag 560. Figure 10 The air outlet 531 is connected to the air suction element 520 through a pipeline, and the air suction element 520 is a fan.

[0060] The cyclone 540 is provided below the dust removal cylinder 530 and is preferably fixedly connected to the base. The cyclone 540 is provided with a feed port 541 which is eccentrically arranged on the cyclone 540, that is, the axis of the feed port 541 is perpendicular to the meridian of the cyclone 540.

[0061] The collecting barrel 550 is connected to the bottom of the cyclone barrel 540 . In order to facilitate the disassembly of the collecting barrel 550 and the removal of materials, the collecting barrel 550 and the cyclone barrel 540 are also connected by a clamp 590 in this embodiment.

[0062] Refer to the attached Figure 11 and Figure 12The bottom of the dust removal barrel 530 is provided with an air inlet 532 that is inserted downward into the cyclone barrel 540. The air inlet 532 is arranged in an inverted cone shape. The air inlet 532 is provided on the bottom plate 580, and the opening of the air inlet 532 passes through the cyclone barrel 540 and extends into the collection barrel 550. The opening of the air inlet 532 is lower than the height of the feed port 541, thereby facilitating the formation of a better cyclonic effect.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A nail plate crusher, characterized by: The invention comprises a control box (200), a feed crushing device (100) installed on the control box (200), a feeding device (300) for feeding the feed crushing device (100), a material barrel (600) of a nail plate crusher connected to the feed crushing device (100), and a dust removal device (500) connected to the top of the material barrel (600) through a pipeline; The feed crushing device (100) comprises a crushing shell (110) having a crushing chamber (111) therein, a fixed nail plate (120) provided on the crushing shell (110), and a rotating nail plate (130) rotatably mounted on the crushing chamber (111) via a rotating shaft (410); the fixed nail plate (120) is provided with fixed nail teeth (122), and the rotating nail plate (130) is provided with rotating nail teeth (132); the fixed nail plate (120) and the rotating nail plate (130) are arranged opposite to each other, and the fixed nail teeth (122) and the rotating nail teeth (132) are arranged alternately in a radial direction; The dust removal device (500) comprises a dust removal cylinder (530), a cyclone cylinder (540) arranged below the dust removal cylinder (530), a collecting cylinder (550) connected to the bottom of the cyclone cylinder (540), and a dust removal bag (560) arranged inside the dust removal cylinder (530); the bottom of the dust removal cylinder (530) is provided with an air inlet (532) inserted downward into the cyclone cylinder (540); the side wall of the dust removal cylinder (530) is provided with an air outlet (531); the cyclone cylinder (540) is provided with a feed port (541) connected to the material cylinder (600); the dust removal bag (560) is spaced apart from the inner wall of the dust removal cylinder (530); and the bottom of the dust removal bag (560) is communicated with the air inlet (532) of the dust removal cylinder (530).

2. The nail plate crusher according to claim 1, characterized in that: The fixed nail plate (120) is provided with a plurality of first annular protrusions (121), the fixed nail teeth (122) are provided on the first annular protrusions (121), and a gap is formed between the end of the fixed nail teeth (122) and the end face of the rotating nail plate (130); the rotating nail plate (130) is provided with a plurality of second annular protrusions (131), the rotating nail teeth (132) are provided on the second annular protrusions (131), and a gap is formed between the end of the rotating nail teeth (132) and the end face of the fixed nail teeth (122).

3. The nail plate crusher according to claim 1, characterized in that: The feed pipe (112) is provided with a liquid nitrogen inlet (113); the front, back and side surfaces of the pulverizing shell (110) are respectively provided with a first cooling cavity (150), a second cooling cavity (160) and a third cooling cavity (170).

4. The nail plate crusher according to claim 1, characterized in that: The feed port (541) is eccentrically arranged on the cyclone (540), and the air inlet (532) is arranged in an inverted cone shape.

5. The nail plate crusher according to claim 1 or 4, characterized in that: A lifting drive member (570) connected to the dust removal bag (560) is provided at the top of the dust removal cylinder (530).

6. The nail plate crusher according to claim 1, characterized in that: A heat dissipation cavity (210) is provided in the control box (200), a drive motor (700) is installed in the heat dissipation cavity (210), and the drive motor (700) is connected to the feed crushing device (100) via a high-speed bearing box (400); a heat dissipation structure is provided on the heat dissipation cavity (210).

7. The nail plate crusher according to claim 6, characterized in that: The high-speed bearing box (400) comprises a rotating shaft (410) for connecting a driving motor (700) and a rotating nail plate (130), a bearing box body (420) disposed outside the rotating shaft (410), a plurality of bearings (430) disposed between the rotating shaft (410) and the bearing box body (420), and a grinder rear cover (440) and a docking end cover (450) respectively connected to both ends of the bearing box body (420), wherein the docking end cover (450) is connected to the control box (200), and the bearing box body, the grinder rear cover (440), the docking end cover (450) and the rotating shaft (410) are all spaced apart. An air intake channel (421) is provided on the bearing housing (420), the grinder rear cover (440) and the docking end cover (450). The air intake channel (421) forms an air outlet (442) on the inner wall of the grinder rear cover (440), and an air intake (451) is formed on the end surface of the docking end cover (450). A first one-way valve structure (460) and a second one-way valve structure (470) are provided on the inner side of the grinder rear cover (440). The first one-way valve structure (460) and the second one-way valve structure (470) are respectively provided on both sides of the air outlet (442).

8. The nail plate crusher according to claim 7, characterized in that: A heat-equalizing chamber (480) is formed around the inner wall of the grinder rear cover (440), the first one-way valve structure (460), and the second one-way valve structure (470), and a heat-conducting disk (490) is provided on the rotating shaft (410).

9. The nail plate crusher according to claim 8, characterized in that: The outer circle of the heat conducting plate (490) is provided with a plurality of heat dissipation fins (491), and the heat conducting plate (490) is provided with a plurality of penetrating heat dissipation holes (492).

10. The nail plate crusher according to claim 7, 8 or 9, characterized in that: The first one-way valve structure (460) comprises a first mounting block (461) mounted on the end of the grinder rear cover (440) away from the bearing housing (420), a first clamping block (462) mounted on the first mounting block (461), and a first sealing sheet (463) clamped between the first mounting block (461) and the first clamping block (462), wherein the inner diameter of the first sealing sheet (463) is smaller than the outer diameter of the corresponding position of the bearing (430); the second one-way valve structure (470) comprises a second mounting block (471) mounted on the end of the grinder rear cover (440) facing the bearing housing (420), a second clamping block (472) mounted on the second mounting block (471), and a second sealing sheet (473) clamped between the second mounting block (471) and the second clamping block (472), wherein the inner diameter of the second sealing sheet (473) is smaller than the outer diameter of the corresponding position of the bearing (430).

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