A powder pesticide production grinding device

Abstract

The present invention belongs to the technical field of powder pesticide production and grinding, and specifically is a powder pesticide production and grinding device, comprising a box body, a driving shaft is rotatably installed in the box body, a crushing shaft is fixedly mounted on the driving shaft, and a grinding roller is rotatably mounted on the driving shaft, the grinding roller is located in a grinding barrel, the upper end of the grinding barrel is fixedly connected to a conical cover, the conical cover is fixedly mounted in the box body, the upper end of the driving shaft is rotatably connected to a bent pipe, one end of the bent pipe is connected to the air inlet end of an exhaust fan, the air outlet end of the exhaust fan is located inside the box body, a first gear is fixedly mounted on the upper end of the driving shaft, and the powder in the material basket can be quickly sucked away by the ventilation groove by rotating the material stripping rack, thereby realizing rapid cleaning of unqualified powder in the material basket, the sucked away powder is re-put into the box body, and the driving shaft is controlled to rotate forwardly to realize secondary grinding of unqualified powder, thereby improving the powder output rate of qualified powder.

Description

Technical Field

[0001] The invention belongs to the technical field of powder pesticide production and grinding, in particular to a powder pesticide production and grinding device. Background Art

[0002] Powdered pesticide is a type of pesticide dosage form, which is characterized by a powdered preparation containing the active ingredients of the pesticide. Powdered pesticide is made from a variety of pesticide technical materials and fillers such as clay and clay, and is generally mixed through mechanical processing, crushing and grinding. The processing of powdered pesticide raw materials requires grinding equipment for grinding.

[0003] The patent with publication number CN116786223A discloses a grinding device for the production of powder pesticides, including a supporting mechanism, a crushing mechanism is arranged in the supporting mechanism, a grinding mechanism is arranged below the crushing mechanism, and a screening mechanism is arranged below the grinding mechanism; the scheme pre-crushes the added raw materials through the pre-crushing mechanism, so that the grinding mechanism can further refine the raw materials. Since the auxiliary crushing shaft in the pre-crushing mechanism can move up and down, the shearing force of the auxiliary crushing shaft on the raw materials is improved, and the efficiency of the raw materials being pre-crushed is accelerated. The pre-crushed raw materials are ground by two sets of grinding shafts in the grinding mechanism, and the raw materials are screened by the screening plate on the screening mechanism, so that the device can quickly obtain high-quality raw material powder.

[0004] In the above scheme, the extrusion plate arranged on the screening plate can move to flatten the raw materials accumulated on the surface of the screening plate, improve the screening efficiency and prevent the clogging of the screening holes. However, after grinding, the raw materials will directly fall on the middle area of ​​the screening plate and form an accumulation. If the two groups of extrusion plates move toward each other, the powder raw materials will not only fail to be flattened on the screening plate by the extrusion plates, but the accumulated powder raw materials will also be clamped between the two groups of extrusion plates, affecting the screening of the powder raw materials by the screening plate. For this reason, the present invention provides a powder pesticide production grinding device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a powder pesticide production grinding device described in the present invention includes a box body, a driving shaft is rotatably installed in the box body, a crushing shaft is fixedly mounted on the driving shaft, and a grinding roller is rotatably mounted on the driving shaft, the grinding roller is located in a grinding barrel, the upper end of the grinding barrel is fixedly connected to a conical cover, the conical cover is fixedly installed in the box body, the upper end of the driving shaft is rotatably connected to a bent pipe, one end of the bent pipe is connected to the air inlet end of an exhaust fan, the air outlet end of the exhaust fan is located inside the box body, a first gear is fixedly mounted on the upper end of the driving shaft, the first gear meshes with a second gear, the second gear is rotatably mounted at the upper end of the box body, and the box body inlet The material end is connected to the material delivery pipe, and a screening mechanism is arranged directly below the grinding barrel. The screening mechanism includes a material holding basket, which is located directly below the grinding barrel and is fixedly installed in the box body. The lower end of the driving shaft is rotatably connected to the bottom of the material holding basket, and six groups of screening nets are fixedly installed in the material holding basket. A material stripping rack is movably installed in the material holding basket, and one end of the material stripping rack is fixedly connected to the driving shaft. A ventilation slot is opened on the side of one end of the material stripping rack, and the ventilation slot is connected to the inside of the driving shaft. A sealing plate is hinged at the end of the ventilation slot, and a U-shaped elastic strip is arranged on the inner side of the sealing plate. Four groups of ratchets are hinged inside the lower end of the grinding roller, and the four groups of ratchets are all clamped with ratchets, and the ratchet is fixedly sleeved on the driving shaft.

[0007] Through the cooperation of the pawl and the ratchet wheel, the driving shaft is controlled to reverse and the grinding roller is paused. By rotating the stripping rack, the powder in the material basket can be quickly sucked out by the ventilation slot, so that the unqualified powder in the material basket can be quickly cleaned up. The sucked out powder is put back into the box, and the driving shaft is controlled to rotate forward to realize secondary grinding of the unqualified powder and improve the powder output rate of qualified powder.

[0008] Preferably, the screening mechanism also includes an arc-shaped rack, an arc-shaped groove is provided on the stripping frame, the arc-shaped rack is slidably connected to the arc-shaped groove, a lever fixedly connected to one end of the arc-shaped rack, a scraper installed on the lever, two sets of pulleys, the two sets of pulleys are rotatably installed in the stripping frame, a synchronous belt coiled on the two sets of pulleys, a driven rod, the lower end of the driven rod is fixedly connected to the synchronous belt, a spring, one end of the spring is fixedly connected to the synchronous belt, one end of the spring is fixedly connected to the driving shaft, the lower end of the scraper fits the screening net, the pulley is rotatably connected to the synchronous belt, the outer ring of one set of pulleys is provided with a plurality of sets of teeth, the other end of the arc-shaped rack meshes with the teeth, the lower end of the grinding roller is fixedly sleeved with a fixed disk, and the lower end surface of the fixed disk is provided with four sets of convex plates for pushing the driven rod;

[0009] Under the rebound force of the spring, the scraper moves back. Since four groups of convex plates are provided, the scraper can move back and forth in the material basket, thereby improving the screening efficiency of the screening net for powder raw materials.

[0010] Preferably, the lever comprises a rod body, one end of the rod body is fixedly connected to one end of an arc-shaped rack, a swivel shaft rotatably installed in the rod body, a turntable fixedly sleeved on one end of the swivel shaft, a T-shaped frame movably installed in one end of the rod body, a T-shaped frame fixedly connected to an elastic hook at the upper end of the T-shaped frame is provided on one end of the rod body for clamping the elastic hook, a torsion spring sleeved on the swivel shaft, one end of the torsion spring is fixedly connected to one side of the turntable, and the other end of the torsion spring is fixedly connected to the inner wall of the rod body, a pin shaft is provided on the other side of the turntable, a rectangular groove is provided on the T-shaped frame, the end of the pin shaft is located in the rectangular groove, through holes are provided at both ends of the T-shaped frame, guide columns are fixedly installed in the rod body, a fixed block for pushing the scraper is provided on one side of the material stripping frame, and an unlocking rod for pushing the elastic hook is provided on the driving shaft;

[0011] When the scraper moves back and forth, the amount of powder pushed to the middle area of ​​the basket will be reduced, so that the powder distributed on the screening net is relatively uniform, further improving the screening efficiency of the screening net for powder.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. Through the cooperation of the pawl and the ratchet wheel, the driving shaft is controlled to reverse and the grinding roller is paused. By rotating the stripping rack, the powder in the material basket can be quickly sucked out by the ventilation slot, so that the unqualified powder in the material basket can be quickly cleaned up. The sucked out powder is put back into the box, and the driving shaft is controlled to rotate forward to realize the secondary grinding of the unqualified powder and improve the powder output rate of qualified powder.

[0014] 2. When the material stripping rack rotates in the material basket, the material stripping rack will drive the shifting rod, scraper, arc-shaped rack, driven rod and other components to rotate together. The upper end of the driven rod will be squeezed by the end of the convex plate, and the upper end of the driven rod will slide along the inner circle of the convex plate. The driven rod will first move toward the center of the material basket, and the moving driven rod drives the synchronous belt to make circular motion around the two sets of pulleys, and the synchronous belt stretches the spring. At the same time, one set of pulleys drives the arc-shaped rack to slide upward along the arc groove, and the arc-shaped rack drives the shifting rod to move together with the scraper. The moving scraper drives the powder located in the middle area of ​​the material basket to move toward the edge, so that the powder can be distributed to the screening net near the edge area of ​​the material basket, until the upper end of the driven rod is offset from the middle of the inner circle of the convex plate, and the scraper moves back under the rebound force of the spring. Since four sets of convex plates are provided, the scraper can move back and forth in the material basket, thereby improving the screening efficiency of the screening net for powder raw materials.

[0015] 3. When the moving scraper drives the powder in the middle area of ​​the material basket to move toward the edge, when the scraper is squeezed by the fixed block on one side of the material stripping frame, the scraper drives the rotating shaft and the turntable to rotate toward the driving shaft, and the torsion spring is screwed. As the turntable rotates, the pin on the turntable will squeeze the groove wall of the rectangular groove on the T-frame, so that the T-frame and the elastic hook move upward. As the elastic hook moves upward, the upper end of the elastic hook will be squeezed by the T-frame, causing the elastic hook to bend and deform to one side until the elastic hook is The upper end of the hook is offset from the profile frame, and under the elastic action of the elastic hook, the upper end of the elastic hook is engaged with the profile frame to keep the scraper in a flipped position until the upper end of the elastic hook is pushed by the end of the unlocking rod, so that the upper end of the elastic hook is released from the profile frame, and under the action of the counter-torque force of the torsion spring, the lower end of the scraper is re-fitted with the screening net. In this way, during the back and forth movement of the scraper, the amount of powder pushed to the middle area of ​​the material basket will be reduced, so that the powder distributed to the screening net will be relatively uniform, further improving the screening efficiency of the screening net for powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a schematic cross-sectional view of the structure of the present invention.

[0019] Figure 3 Schematic diagram of the combination of the driving shaft and the grinding roller of the present invention

[0020] Figure 4 It is a schematic diagram of the combination of the driving shaft and the screening mechanism in cross section of the present invention.

[0021] Figure 5 It is a schematic diagram of the cross-section of the driving shaft, the stripping rack, the ventilation slot, the blocking plate, and the U-shaped spring bar assembly of the present invention.

[0022] Figure 6 It is a schematic diagram of the combination of the driving shaft and the stripping rack in a partial cross-section of the present invention.

[0023] Figure 7 It is a schematic diagram of the combination of the driving shaft, grinding roller and screening mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the driving shaft, the stripping frame, the arc-shaped rack, the cross-sectional shifting rod and the scraper assembly of the present invention.

[0025] Fig. 9 It is a schematic diagram of the unlocking lever, the cross-sectional view of the lever and the scraper assembly of the present invention.

[0026] Fig.10It is a schematic diagram of the assembly of the turntable, T-shaped frame and elastic hook of the present invention.

[0027] In the figure: 1, box; 2, driving shaft; 21, ratchet; 201, unlocking lever; 3, crushing shaft; 4, grinding roller; 41, ratchet; 401, fixed plate; 402, convex plate; 5, grinding barrel; 6, conical cover; 7, elbow; 8, exhaust fan; 9, first gear; 10, second gear; 11, screening mechanism; 12, feeding pipe; 111, material basket; 112, screening net; 113, material stripping rack; 31, arc groove; 32, fixed block; 114, ventilation groove; 115, Sealing plate; 116, U-shaped spring bar; 117, arc-shaped rack; 118, lever; 119, scraper; 120, pulley; 1201, teeth; 121, synchronous belt; 122, driven rod; 123, spring; 1181, rod body; 1182, rotating shaft; 1183, turntable; 831, pin shaft; 1184, T-shaped frame; 841, rectangular groove; 842, guide column; 843, through hole; 1185, elastic hook; 1186, T-shaped frame; 1187, torsion spring. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0029] like Figures 1 to 4As shown, a powder pesticide production grinding device described in an embodiment of the present invention includes a box body 1, a driving shaft 2 is rotatably installed in the box body 1, a crushing shaft 3 is fixedly mounted on the driving shaft 2, and a grinding roller 4 is rotatably mounted on the driving shaft 2, the grinding roller 4 is located in a grinding barrel 5, the upper end of the grinding barrel 5 is fixedly connected to a conical cover 6, and the conical cover 6 is fixedly installed in the box body 1, the upper end of the driving shaft 2 is rotatably connected to a bend pipe 7, one end of the bend pipe 7 is connected to the air inlet end of an exhaust fan 8, and the air outlet end of the exhaust fan 8 is located inside the box body 1, a first gear 9 is fixedly mounted on the upper end of the driving shaft 2, the first gear 9 meshes with a second gear 10, and the second gear 10 is rotatably mounted at the upper end of the box body 1, the feeding end of the box body 1 is connected to a feed pipe 12, and a screening mechanism 11 is provided directly below the grinding barrel 5, The selection mechanism 11 includes a material holding basket 111, which is located directly below the grinding barrel 5 and is fixedly installed in the box body 1. The lower end of the driving shaft 2 is rotatably connected to the bottom of the material holding basket 111, six groups of screening nets 112 are fixedly installed in the material holding basket 111, and a material stripping rack 113 is movably installed in the material holding basket 111. One end of the material stripping rack 113 is fixedly connected to the driving shaft 2, and a ventilation groove 114 is opened on the side of one end of the material stripping rack 113. The ventilation groove 114 is connected to the inside of the driving shaft 2, and a sealing plate 115 is hinged at the end of the ventilation groove 114. A U-shaped elastic strip 116 is arranged on the inner side of the sealing plate 115. Four groups of ratchet pawls 41 are hinged at the lower end of the grinding roller 4. The four groups of ratchet pawls 41 are all clamped with the ratchet 21, and the ratchet 21 is fixedly sleeved on the driving shaft 2.

[0030] Specifically, the pawl 41 is made of magnet material, and the pawl 41 has a certain adsorption force on the ratchet 21. The box body 1 is made of transparent tempered glass. The lower end surface of the material stripping frame 113 is in contact with the screening net 112. A sealing sleeve is provided at the rotating connection between the bent pipe 7 and the driving shaft 2. The sealing sleeve ensures the sealing of the rotating connection between the bent pipe 7 and the driving shaft 2. When it is necessary to grind the powder pesticide raw materials, the driving shaft 2 is first driven by the motor to rotate forward, and the rotation direction is downward. Figure 4The middle arrow indicates the direction, the driving shaft 2 will drive the crushing shaft 3, the ratchet 21, and the material stripping frame 113 to rotate together, and the ratchet 21 drives the grinding roller 4 to rotate through the ratchet 41, and then the raw material is transported to the box body 1 through the feeding pipe 12. As the raw material enters the box body 1, the cutting saw on the crushing shaft 3 breaks the raw material to achieve pre-crushing of the raw material. The pre-crushed raw material passes through the conical cover 6 and flows between the grinding roller 4 and the grinding barrel 5. As the grinding roller 4 rotates, the pre-crushed raw material will be subjected to intense friction between the grinding roller 4 and the inner wall of the grinding barrel 5, so that the pre-crushed raw material is ground into powder and becomes powder. The raw materials fall into the material basket 111 through the lower port of the grinding barrel 5. At this time, the rotating material stripping rack 113 will push the raw materials to become powder, so that the raw materials to become powder are spread on the six groups of screening nets 112, accelerating the screening of the powder raw materials by the screening nets 112. The screened powder raw materials flow out through the lower port of the box body 1, and unqualified powder raw materials will be retained in the material basket 111. When there are too many unqualified powder raw materials in the material basket 111, the motor drives the driving shaft 2 to reverse at a low speed. At this time, the pawl 41 cannot resist the ratchet wheel 21, so that the grinding roller 4 cannot rotate, and the exhaust fan 8 is started. The exhaust fan 8 passes through the curved pipe 7 continuously sucks the air in the driving shaft 2 and discharges it into the box body 1. Under the action of atmospheric pressure, the blocking plate 115 will rotate toward the ventilation slot 114 and compress the U-shaped elastic strip 116. At the same time, the powder in the material basket 111 will be sucked into the ventilation slot 114, and the powder will pass through the driving shaft 2 and the elbow 7 in turn, and finally be sprayed into the box body 1 through the air outlet end of the exhaust fan 8, so that the powder in the material basket 111 is quickly sucked away. After the powder in the material basket 111 is completely sucked away, the exhaust fan 8 is stopped. Under the action of the rebound force of the U-shaped elastic strip 116, the blocking plate 115 closes the ventilation slot 114. At port 4, the driving shaft 2 is controlled to rotate forward so that the unqualified powder contained in the powder is ground again by the grinding roller 4, so as to obtain qualified powder. Compared with the prior art, the driving shaft 2 is controlled to reverse through the cooperation of the pawl 41 and the ratchet wheel 21, so that the grinding roller 4 is paused, and the powder in the material basket 111 can be quickly sucked away by the ventilation groove 114 by rotating the material stripping rack 113, so as to achieve rapid cleaning of the unqualified powder in the material basket 111, and the sucked away powder is re-put into the box body 1, and the driving shaft 2 is controlled to rotate forward to achieve secondary grinding of the unqualified powder, thereby improving the powder output rate of qualified powder. Embodiment 2

[0031] like Figure 5 and Figure 6As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the screening mechanism 11 also includes an arc-shaped rack 117, an arc-shaped groove 31 is provided on the stripping frame 113, the arc-shaped rack 117 is slidably connected to the arc-shaped groove 31, a lever 118 fixedly connected to one end of the arc-shaped rack 117, a scraper 119 mounted on the lever 118, two sets of pulleys 120, the two sets of pulleys 120 are rotatably mounted in the stripping frame 113, a synchronous belt 121 coiled on the two sets of pulleys 120, a driven rod 122, and a lower end of the driven rod 122 is fixed The synchronous belt 121 and the spring 123 are fixedly connected. One end of the spring 123 is fixedly connected to the synchronous belt 121. One end of the spring 123 is fixedly connected to the driving shaft 2. The lower end of the scraper 119 fits the screening net 112. The pulley 120 is rotatably connected to the synchronous belt 121. A group of outer rings of the pulleys 120 are provided with a plurality of groups of teeth 1201. The other end of the arc-shaped rack 117 meshes with the teeth 1201. The lower end of the grinding roller 4 is fixedly sleeved with a fixed disk 401. Four groups of convex plates 402 for pushing the driven rod 122 are arranged on the lower end surface of the fixed disk 401.

[0032] Specifically, after the grinding roller 4 and the grinding barrel 5 grind the pre-crushed raw materials, the raw materials that become powder fall into the middle area of ​​the material holding basket 111 under the action of gravity, so that the screening net 112 near the edge of the material holding basket 111 cannot contact the powder raw materials, resulting in the screening net 112 in this area being unable to screen the powder raw materials, so that the screening net 112 cannot be fully utilized, thereby reducing the screening efficiency of the screening net 112 for the powder raw materials. Therefore, when the stripping rack 113 rotates in the material holding basket 111, the stripping rack 113 will drive the shifting rod 118, the scraper 119, the arc-shaped rack 117, the driven rod 122 and other components to rotate together. During the rotation process, the upper end of the driven rod 122 will be squeezed by the end of the convex plate 402, and the upper end of the driven rod 122 will slide along the inner circle of the convex plate 402. The driven rod 122 will first move toward the material holding basket 111. The basket 111 moves in the center direction, and the moving driven rod 122 drives the synchronous belt 121 to do circular motion around the two sets of pulleys 120, and the synchronous belt 121 stretches the spring 123. At the same time, one set of pulleys 120 drives the arc rack 117 to slide upward along the arc groove 31, and the arc rack 117 drives the lever 118 to move together with the scraper 119. The moving scraper 119 drives the powder located in the middle area of ​​the material basket 111 to move toward the edge, so that the powder can be distributed to the screening net 112 near the edge area of ​​the material basket 111, until the upper end of the driven rod 122 is offset from the middle of the inner circle of the convex plate 402, and the scraper 119 moves back under the rebound force of the spring 123. Since the convex plate 402 is provided with four groups, the scraper 119 can move back and forth in the material basket 111, thereby improving the screening efficiency of the screening net 112 for powder raw materials.

[0033] like Figures 7 to 9As shown, the lever 118 includes a rod body 1181, one end of the rod body 1181 is fixedly connected to one end of the arc-shaped rack 117, a rotating shaft 1182 rotatably installed in the rod body 1181, a turntable 1183 fixedly sleeved on one end of the rotating shaft 1182, a T-shaped frame 1184 movably installed in one end of the rod body 1181, an elastic hook 1185 fixedly connected to the upper end of the T-shaped frame 1184, a T-shaped frame 1186 for clamping the elastic hook 1185 is provided on one end of the rod body 1181, a torsion spring 1187 sleeved on the rotating shaft 1182, and one end of the torsion spring 1187 is fixed One side of the connecting turntable 1183 is connected, and the other end of the torsion spring 1187 is fixed to the inner wall of the connecting rod body 1181. A pin shaft 831 is arranged on the other side of the turning disk 1183. A rectangular groove 841 is provided on the T-shaped frame 1184. The end of the pin shaft 831 is located in the rectangular groove 841. Through holes 843 are provided at both ends of the T-shaped frame 1184. The through holes 843 are plugged into guide columns 842. The guide columns 842 are fixedly installed in the rod body 1181. A fixed block 32 for pushing the scraper 119 is provided on one side of the stripping frame 113, and an unlocking rod 201 for pushing the elastic hook 1185 is provided on the driving shaft 2.

[0034] Specifically, when the scraper 119 moves back, the scraper 119 will also push the powder in the material basket 111 to the middle area, so that the amount of powder distributed on the screening net 112 is relatively large. Therefore, when the moving scraper 119 drives the powder in the middle area of ​​the material basket 111 to move toward the edge, when the scraper 119 is squeezed by the fixed block 32 on one side of the material stripping frame 113, the scraper 119 drives the rotary shaft 1182 together with the rotating disk 118 3 is rotated toward the driving shaft 2, and the torsion spring 1187 is screwed. As the turntable 1183 rotates, the pin 831 on the turntable 1183 will squeeze the groove wall of the rectangular groove 841 on the T-frame 1184, so that the T-frame 1184 and the elastic hook 1185 move upward. As the elastic hook 1185 moves upward, the upper end of the elastic hook 1185 will be squeezed by the T-frame 1186, so that the elastic hook 1185 bends to one side. The scraper 119 is deformed until the upper end of the elastic hook 1185 is offset from the profile frame 1186, and under the elastic action of the elastic hook 1185, the upper end of the elastic hook 1185 is clamped to the profile frame 1186, so that the scraper 119 remains in a flipped position, so that the lower end of the scraper 119 cannot be attached to the screening net 112, and during the process of the scraper 119 moving back, the scraper 119 cannot push the powder to the middle area of ​​the material basket 111 until the upper end of the elastic hook 1185 is The end of the unlocking rod 201 is pushed to release the upper end of the elastic hook 1185 from the clamping connection with the mold frame 1186, and under the action of the counter-torque force of the torsion spring 1187, the lower end of the scraper 119 is re-fitted with the screening net 112. In this way, during the back and forth movement of the scraper 119, the amount of powder pushed to the middle area of ​​the material basket 111 will be reduced, and the powder distributed to the screening net 112 will be relatively uniform, further improving the screening efficiency of the screening net 112 for powder.

[0035] Working principle: First, the motor drives the active shaft 2 to rotate forward, and the rotation direction is Figure 4The middle arrow indicates the direction, the driving shaft 2 will drive the crushing shaft 3, the ratchet 21, and the material stripping rack 113 to rotate together, and the ratchet 21 drives the grinding roller 4 to rotate through the ratchet 41, and then the raw material is transported to the box body 1 through the feeding pipe 12. As the raw material enters the box body 1, the cutting saw on the crushing shaft 3 breaks the raw material to achieve pre-crushing of the raw material. The pre-crushed raw material passes through the conical cover 6 and flows between the grinding roller 4 and the grinding barrel 5. As the grinding roller 4 rotates, the pre-crushed raw material will be subjected to intense friction between the grinding roller 4 and the inner wall of the grinding barrel 5, so that the pre-crushed raw material is ground into powder, and the powdered raw material falls into the material holding basket 111 through the lower port of the grinding barrel 5. At this time, the rotating material stripping rack 113 will push the powdered raw material, so that the powdered raw material is spread on the six groups of screening nets 112, accelerating the screening of the powdered raw material by the screening nets 112, and the screened powdered raw material flows out through the lower port of the box body 1, while unqualified powdered raw material will be retained in the material holding basket 111. When there are too many unqualified powder raw materials in the material basket 111, the motor drives the driving shaft 2 to reverse at a low speed. At this time, the ratchet 41 cannot resist the ratchet wheel 21, so that the grinding roller 4 cannot rotate, and the exhaust fan 8 is started. The exhaust fan 8 continuously sucks the air in the driving shaft 2 through the curved pipe 7 and discharges it into the box body 1. Under the action of atmospheric pressure, the blocking plate 115 will rotate toward the ventilation slot 114 and compress the U-shaped elastic strip 116. At the same time, the powder in the material basket 111 will be sucked into the ventilation slot 114. The powder will pass through the driving shaft 2 and the elbow 7 in sequence, and finally be sprayed into the box body 1 through the air outlet of the exhaust fan 8, so that the powder in the material basket 111 is quickly sucked away. After the powder in the material basket 111 is completely sucked away, the exhaust fan 8 is stopped, and under the rebound force of the U-shaped elastic bar 116, the blocking plate 115 closes the end of the ventilation slot 114, and the driving shaft 2 is controlled to rotate forward, so that the unqualified powder contained in the powder is ground again by the grinding roller 4, so as to obtain qualified powder;

[0036] When the stripping frame 113 rotates in the material basket 111, the stripping frame 113 will drive the lever 118, the scraper 119, the arc-shaped rack 117, the driven rod 122 and other components to rotate together. During the rotation, the upper end of the driven rod 122 will be squeezed by the end of the convex plate 402, and the upper end of the driven rod 122 will slide along the inner circle of the convex plate 402. The driven rod 122 will first move toward the center of the material basket 111. The moving driven rod 122 drives the synchronous belt 121 to make a circular motion around the two sets of pulleys 120, and the synchronous belt 121 stretches the spring 123. At the same time, one set of pulleys 120 drives the arc-shaped rack 117 to slide upward along the arc-shaped groove 31, and the arc-shaped rack 117 drives the lever 118 to move together with the scraper 119, and the moving scraper 119 drives the powder located in the middle area of ​​the material basket 111 to move toward the edge, so that the powder can be distributed to the screening net 112 near the edge area of ​​the material basket 111, until the upper end of the driven rod 122 is offset from the middle of the inner circle of the convex plate 402, and the scraper 119 moves back under the rebound force of the spring 123. Since the convex plate 402 is provided with four groups, the scraper 119 can move back and forth in the material basket 111;

[0037] In the process of the moving scraper 119 driving the powder located in the middle area of ​​the material basket 111 to move toward the edge, when the scraper 119 is squeezed by the fixed block 32 on one side of the material stripping frame 113, the scraper 119 drives the rotating shaft 1182 and the turntable 1183 to rotate toward the driving shaft 2, and the torsion spring 1187 is screwed. As the turntable 1183 rotates, the pin 831 on the turntable 1183 will squeeze the groove wall of the rectangular groove 841 on the T-frame 1184, so that the T-frame 1184 and the elastic hook 1185 move upward. As the elastic hook 1185 moves upward, the upper end of the elastic hook 1185 will be squeezed by the T-frame 1186, so that the elastic hook 118 5 bends and deforms to one side until the upper end of the elastic hook 1185 is offset from the profile frame 1186, and under the elastic action of the elastic hook 1185, the upper end of the elastic hook 1185 is engaged with the profile frame 1186, so that the scraper 119 keeps a flipped posture, so that the lower end of the scraper 119 cannot be attached to the screening net 112. During the movement of the scraper 119 back, the scraper 119 cannot push the powder to the middle area of ​​the material basket 111, until the upper end of the elastic hook 1185 is pushed by the end of the unlocking rod 201, so that the upper end of the elastic hook 1185 is released from the profile frame 1186, and under the action of the counter-torque force of the torsion spring 1187, the lower end of the scraper 119 is again attached to the screening net 112.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. 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, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A powder pesticide production grinding device, comprising a housing (1), characterized in that: A driving shaft (2) is rotatably mounted in the housing (1), a crushing shaft (3) is fixedly mounted on the driving shaft (2), and a grinding roller (4) is rotatably mounted on the driving shaft (2), the grinding roller (4) is located in a grinding barrel (5), the upper end of the grinding barrel (5) is fixedly connected to a conical cover (6), the conical cover (6) is fixedly mounted in the housing (1), the upper end of the driving shaft (2) is rotatably connected to a curved pipe (7), one end of the curved pipe (7) is connected to an air inlet end of an exhaust fan (8), the air outlet end of the exhaust fan (8) is located inside the housing (1), a first gear (9) is fixedly mounted on the upper end of the driving shaft (2), the first gear (9) meshes with a second gear (10), the second gear (10) is rotatably mounted at the upper end of the housing (1), the feed end of the housing (1) is connected to a feed pipe (12), and a screening mechanism (11) is arranged directly below the grinding barrel (5); The screening mechanism (11) comprises: A material holding basket (111), the material holding basket (111) is located directly below the grinding barrel (5), and the material holding basket (111) is fixedly installed in the box body (1), and the lower end of the driving shaft (2) is rotatably connected to the bottom of the material holding basket (111); Six groups of screening nets (112) fixedly mounted in the material holding basket (111); A material stripping frame (113) movably mounted in the material holding basket (111), one end of the material stripping frame (113) being fixedly connected to the driving shaft (2); A ventilation slot (114) is provided on the side surface of one end of the stripping frame (113), and the ventilation slot (114) is connected to the interior of the driving shaft (2); A blocking plate (115) hingedly connected to the end of the ventilation slot (114); A U-shaped spring bar (116) is provided inside the blocking plate (115); four groups of ratchet pawls (41) are hinged inside the lower end of the grinding roller (4); the four groups of ratchet pawls (41) are all engaged with a ratchet wheel (21); and the ratchet wheel (21) is fixedly sleeved on the driving shaft (2); The screening mechanism (11) further comprises: An arc-shaped rack (117), an arc-shaped groove (31) is formed on the stripping frame (113), and the arc-shaped rack (117) is slidably connected to the arc-shaped groove (31); A lever (118) fixedly connected to one end of the arc-shaped rack (117); A scraper (119) mounted on the lever (118); Two sets of pulleys (120), the two sets of pulleys (120) are rotatably mounted in the stripping frame (113); A synchronous belt (121) wound around two sets of pulleys (120); A driven rod (122), the lower end of which is fixedly connected to the synchronous belt (121); A spring (123), one end of the spring (123) being fixedly connected to the synchronous belt (121), and one end of the spring (123) being fixedly connected to the driving shaft (2); The lever (118) comprises: A rod body (1181), one end of the rod body (1181) being fixedly connected to one end of an arc-shaped rack (117); Rotating the rotary shaft (1182) installed in the rod body (1181); A rotating disk (1183) fixedly mounted on one end of the rotating shaft (1182); A T-shaped frame (1184) movably mounted inside one end of the rod body (1181); An elastic hook (1185) fixedly connected to the upper end of the T-shaped frame (1184); A shaped frame (1186) for engaging the elastic hook (1185) is provided on one end of the rod body (1181); A torsion spring (1187) is sleeved on the rotating shaft (1182), one end of the torsion spring (1187) is fixedly connected to one side of the rotating disk (1183), and the other end of the torsion spring (1187) is fixedly connected to the inner wall of the rod body (1181). A pin shaft (831) is provided on the other side of the rotating disk (1183). A rectangular groove (841) is provided on the T-shaped frame (1184), and the end of the pin shaft (831) is located in the rectangular groove (841). Through holes (843) are provided at both ends of the T-shaped frame (1184). The through holes (843) are plugged into guide columns (842), and the guide columns (842) are fixedly installed in the rod body (1181). A fixed block (32) for pushing the scraper (119) is provided on one side of the stripping frame (113), and an unlocking rod (201) for pushing the elastic hook (1185) is provided on the driving shaft (2).

2. A powder pesticide production grinding device according to claim 1, characterized in that: The lower end of the scraper (119) is in contact with the screening net (112), and the pulley (120) is rotatably connected to the synchronous belt (121).

3. A powder pesticide production grinding device according to claim 2, characterized in that: A plurality of groups of teeth (1201) are formed on the outer ring of a group of pulleys (120), and the other end of the arc-shaped rack (117) meshes with the teeth (1201).

4. A powder pesticide production grinding device according to claim 3, characterized in that: A fixed disk (401) is fixedly mounted on the lower end of the grinding roller (4), and four groups of convex plates (402) for pushing the driven rod (122) are arranged on the lower end surface of the fixed disk (401).

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