A multi-stage screening device for fertilizer production

Abstract

The present invention discloses a multi-stage screening device for fertilizer production, which relates to the technical field of biological fertilizer screening and includes a box body. A screening device is arranged inside the box body, and the screening device includes a power part. By setting a motor, a second stirring plate, a first guide plate, a spiral feeding plate, a second guide plate, a filter shell and a filter screen, fertilizers are poured into the interior of the box body. The fertilizers are screened twice by using the filter screen and the filter shell. The motor is started, and the motor drives the second stirring plate to rotate, so that the second stirring plate stirs the fertilizers above the filter screen, facilitating the small-particle fertilizers to pass through the filter screen. The spiral feeding plate is driven to rotate by the output shaft of the motor, so that the fertilizers falling inside the filter shell are conveyed upward along the inner wall of the filter shell. During the upward movement of the fertilizers, the small-particle fertilizers pass through the filter shell and fall downward. The first guide plate is used to prevent the fertilizers passing through the filter screen from directly falling onto the spiral feeding plate and prevent the small-particle fertilizers from falling inside the third discharge pipe.

Description

Technical Field

[0001] The invention relates to the technical field of biofertilizer screening, and in particular to a multi-stage screening device for fertilizer production. Background Art

[0002] Biofertilizer, also known as microbial fertilizer, inoculant or bacterial fertilizer, refers to a type of fertilizer product that uses the life activities of microorganisms as the core to enable crops to obtain specific fertilizer effects. Due to production differences, the fertilizer particles produced are not all uniform. The mixed use of fertilizers with uneven particles will also affect the fertilizer effectiveness, so fertilizers need to be screened.

[0003] A Chinese patent discloses a screening device for the production and processing of biofertilizers, with the publication number CN216359147U, which includes a box, a screening hopper, a linkage propulsion system and a reset system. The screening hoppers are provided with two groups and are arranged side by side up and down. The two groups of screening hoppers are slidably installed inside the box. The linkage propulsion system is arranged on one side of the two groups of screening hoppers. A mounting platform is provided on one side of the box. The mounting platform is fixedly installed with a driving device. The driving device is connected to the linkage propulsion system through a second chain. The reset system corresponds to the two groups of screening hoppers and is movably installed on the other side of the box. After the linkage propulsion system pushes the two groups of screening hoppers to travel a certain distance, the reset system is triggered and pushes the two groups of screening hoppers to reset. Through the mutual cooperation of the linkage propulsion system and the reset system, the screening hoppers are continuously shaken back and forth, which can achieve the purpose of high screening efficiency, greatly shorten the screening time, and improve the screening efficiency.

[0004] However, there are still the following disadvantages: the device starts the driving device to drive the first slide plate and the second slide plate to move left and right, so that the screen shakes and the fertilizer is screened, but the shaking of the filter screen has a poor stirring effect on the fertilizer, which makes the screening efficiency of the biological fertilizer low. Therefore, we propose a multi-stage screening device for fertilizer production to solve this problem. Summary of the invention

[0005] The present invention provides a multi-stage screening device for fertilizer production to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A multi-stage screening device for fertilizer production comprises a box body, a first discharge pipe, a second discharge pipe and a third discharge pipe are fixedly connected to the outer surface of the box body, a screening device is arranged inside the box body, and the screening device comprises a power part;

[0008] The power unit includes a motor, a filter screen, a second stirring plate, a first stirring plate, a filter housing, and a spiral feeding plate. The bottom surface of the motor is fixedly connected to the top surface of the box body. The outer surface of the output shaft of the motor rotatably penetrates through the top surface of the box body through a first bearing and extends to the inner side of the box body. The outer surfaces of the filter screen and the filter housing are both fixedly connected to the inner wall of the box body;

[0009] An auxiliary unit is provided on the outer side of the box body;

[0010] The auxiliary unit includes a first conduit, a second conduit, a knocking block, a third stirring plate, two second magnetic blocks, and two third magnetic blocks. The two second magnetic blocks (3201) are respectively arranged on the left and right sides of the first stirring plate (3102). The first stirring plate (3102) drives the second magnetic blocks (3201) to rotate. The bottom outer surface of the first conduit is fixedly and communicatively connected to the left end face of the box body. The two third magnetic blocks are respectively in sealed sliding connection with the inner part of the first conduit and the inner wall of the second conduit.

[0011] A further improvement of the technical solution of the present invention is that the bottom outer surface of the output shaft of the motor rotatably penetrates through the top surface of the filter screen through a second bearing and extends below the filter screen. The first stirring plate is slidably sleeved on the outer surface of the output shaft of the motor. The second stirring plate is fixedly sleeved on the outer surface of the output shaft of the motor. When the motor is started, the motor drives the second stirring plate to rotate, so that the second stirring plate stirs the fertilizer above the filter screen, facilitating the small-particle fertilizer to pass through the filter screen.

[0012] A further improvement of the technical solution of the present invention is that a connecting rod is hinged to the bottom surface of the first stirring plate. A through groove is formed on the top surface of the second stirring plate. A sliding rod is fixedly connected to the inner wall of the through groove. A fourth magnetic block is slidably sleeved on the outer surface of the sliding rod. The bottom surface of the connecting rod is hinged to the top surface of the fourth magnetic block. An elastic plate is fixedly connected to the inner wall of the through groove. The outer surface of the elastic plate is fixedly connected to the outer surface of the fourth magnetic block. A groove is formed on the inner wall of the box body. A first magnetic block is fixedly connected to the inner wall of the groove. The end faces of the first magnetic block and the fourth magnetic block on the side close to each other repel each other. By arranging the fourth magnetic block and the first magnetic block, during the rotation of the second stirring plate, the first magnetic block intermittently pushes the fourth magnetic block to slide along the outer surface of the sliding rod, so that the fourth slider drives the connecting rod to move, and the connecting rod pulls the first stirring plate to move up and down, expanding the stirring range of the first stirring plate.

[0013] A further improvement of the technical solution of the present invention is that the inner wall of the spiral feeding plate is adapted to the inner wall of the filter housing. A support rod is fixedly connected to the bottom outer surface of the output shaft of the motor. The bottom surface of the support rod is fixedly connected to the inner wall of the spiral feeding plate. The top surface of the third discharge pipe extends to the inner side of the filter housing and is fixedly connected to the inner wall of the filter housing. By arranging the spiral feeding plate and the filter housing, the motor output shaft is used to drive the spiral feeding plate to rotate, so that the fertilizer falling into the inner side of the filter housing is conveyed upward along the inner wall of the filter housing. During the upward movement of the fertilizer, the small-particle fertilizer passes through the filter housing and drops downward.

[0014] A further improvement of the technical solution of the present invention lies in that: a first material guiding plate is sleeved outside the output shaft of the motor, and the top surface of the first material guiding plate is fixedly connected to the bottom surface of the filter screen. By providing the first material guiding plate, it is avoided that the fertilizer passing through the filter screen directly falls onto the spiral feeding plate.

[0015] A further improvement of the technical solution of the present invention lies in that: a first elastic member is fixedly connected to the outer surface of the left third magnetic block, the outer surface of the first elastic member is fixedly connected to the inner wall of the first conduit, the left end outer surface of the knocking block extends into the first conduit and is slidably connected to the inner wall of the first conduit, a second elastic member is fixedly connected to the left end face of the knocking block, and the left end of the second elastic member is fixedly connected to the inner wall of the first conduit. By providing the second magnetic block, the first elastic member, the third magnetic block, the first conduit, the second elastic member and the knocking block, during the process of the second stirring plate driving the second magnetic block to rotate, the second magnetic block intermittently pushes the left third magnetic block to move, the compressed gas pushes the knocking block to move, so that the right end of the knocking block knocks on the first material guiding plate.

[0016] A further improvement of the technical solution of the present invention lies in that: a third stirring plate is rotatably sleeved outside the third discharge pipe through a third bearing, a bevel gear ring is fixedly connected to the bottom surface of the third stirring plate, a rotating shaft is provided on the right side of the box body, the left end outer surface of the rotating shaft rotatably penetrates through the right end face of the box body through a fourth bearing and extends to the inside of the box body, a bevel gear is fixedly sleeved on the left end outer surface of the rotating shaft, and the outer surface of the bevel gear is meshed with the outer surface of the bevel gear ring. By providing the third stirring plate, the rotating shaft, the bevel gear ring, the bevel gear and the second material guiding plate, by rotating the rotating shaft, the third stirring plate scrapes the outer surface of the second material guiding plate, facilitating the small-particle fertilizer to slide out of the second discharge pipe along the outer surface of the second material guiding plate.

[0017] A further improvement of the technical solution of the present invention lies in that: a third elastic member is fixedly connected to the right end face of the right third magnetic block, the right end of the third elastic member is fixedly connected to the inner wall of the second conduit, a piston is hermetically slidably connected to the inner wall of the second conduit, a swing rod is hinged to the bottom surface of the piston, the bottom end of the swing rod is rotatably connected to a rotating rod through a pin, and the right end face of the rotating shaft is fixedly connected to the outer surface of the rotating rod. By providing the piston, the second magnetic block intermittently pushes the right third magnetic block to move, so that the air inside the second conduit is compressed, the compressed gas pushes the piston to move up and down, and the piston drives the rotating shaft to rotate, so that the third stirring plate rotates.

[0018] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is:

[0019] 1. The present invention provides a multi-stage screening device for fertilizer production. By setting a motor, a second stirring plate, a first feeding plate, a spiral feeding plate, a second feeding plate, a filter housing and a filter screen, the fertilizer is poured into the interior of the box body. The fertilizer is screened twice by using the filter screen and the filter housing. The motor is started, and the motor drives the second stirring plate to rotate, so that the second stirring plate stirs the fertilizer above the filter screen, facilitating the small-particle fertilizer to pass through the filter screen. The spiral feeding plate is driven to rotate by the output shaft of the motor, so that the fertilizer falling inside the filter housing is conveyed upward along the inner wall of the filter housing. During the upward movement of the fertilizer, the small-particle fertilizer passes through the filter housing and falls downward. The first feeding plate is used to prevent the fertilizer passing through the filter screen from directly falling onto the spiral feeding plate and prevent the small-particle fertilizer from falling inside the third discharge pipe.

[0020] 2. The present invention provides a multi-stage screening device for fertilizer production. By setting a first stirring plate, a connecting rod, a first magnetic block, an elastic plate, a sliding rod and a fourth magnetic block, during the rotation of the second stirring plate, the first magnetic block intermittently pushes the fourth magnetic block to slide along the outer surface of the sliding rod, so that the fourth slider drives the connecting rod to move, and the connecting rod pulls the first stirring plate to move up and down, expanding the stirring range of the first stirring plate and further accelerating the screening of the small-particle fertilizer.

[0021] 3. The present invention provides a multi-stage screening device for fertilizer production. By setting a second magnetic block, a first elastic member, a third magnetic block, a first conduit, a second elastic member and a knocking block, during the rotation of the second stirring plate driving the second magnetic block, the second magnetic block intermittently pushes the left third magnetic block to move, so that the air inside the first conduit is compressed, and the compressed gas pushes the knocking block to move, so that the right end of the knocking block knocks the first feeding plate, preventing the fertilizer particles from accumulating on the top surface of the first feeding plate due to friction, playing an auxiliary role in filtering the fertilizer and accelerating the filtering efficiency of the device.

[0022] 4. The present invention provides a multi-stage screening device for fertilizer production. By setting a second magnetic block, a third magnetic block, a third elastic member, a second conduit, a piston, a rotating shaft, a fixing plate, a bevel gear ring, a third stirring plate and a bevel gear, during the rotation of the second stirring plate driving the second magnetic block, the second magnetic block intermittently pushes the right third magnetic block to move, so that the air inside the second conduit is compressed, and the compressed gas pushes the piston to move up and down. The piston drives the rotating shaft to rotate, and by using the bevel gear and the bevel gear ring, the third stirring plate rotates, facilitating the small fertilizer particles inside the box body to be discharged from the box body through the second discharge pipe, playing an auxiliary role for the discharger of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a three-dimensional structural sectional view of the present invention;

[0025] Figure 3Exploded view of the partial three-dimensional structure of the power unit of the present invention;

[0026] Figure 4 Partial cross-sectional view of the three-dimensional structure of the first conduit of the present invention;

[0027] Figure 5 Partial cross-sectional view of the three-dimensional structure of the second conduit of the present invention;

[0028] Figure 6 is Figure 2 Enlarged view of the structure at position A in

[0029] Figure 7 is Figure 2 Enlarged view of the structure at position B in

[0030] In the figure: 1, box body; 2, first discharge pipe; 3, screening device; 31, power unit; 32, auxiliary unit; 3101, motor; 3102, first stirring plate; 3103, second stirring plate; 3104, first guide plate; 3105, spiral feeding plate; 3106, second guide plate; 3107, filter housing; 3108, connecting rod; 3109, first magnet; 3110, filter screen; 3111, elastic plate; 3112, slide bar; 3113, fourth magnet; 3201, second magnet; 3202, first elastic member; 3203, third magnet; 3204, first conduit; 3205, second elastic member; 3206, knocking block; 3207, third elastic member; 3208, second conduit; 3209, piston; 3210, rotating shaft; 3211, fixing plate; 3212, bevel gear ring; 3214, third stirring plate; 3215, bevel gear; 4, second discharge pipe; 5, third discharge pipe. Detailed implementation manners

[0031] The present invention will be further described in detail below with reference to the embodiments: Embodiment 1

[0032] As Figures 1-4 shown, the present invention provides a multi-stage screening device for fertilizer production, including a box body 1, the outer surface of the box body 1 is fixedly and through-connected with a first discharge pipe 2, a second discharge pipe 4 and a third discharge pipe 5, and a screening device 3 is arranged inside the box body 1, and the screening device 3 includes a power unit 31;

[0033] The power unit 31 includes a motor 3101, a filter screen 3110, a second stirring plate 3103, a first stirring plate 3102, a filter housing 3107, and a spiral feeding plate 3105. The bottom surface of the motor 3101 is fixedly connected to the top surface of the box body 1. The outer surface of the output shaft of the motor 3101 rotatably penetrates through the top surface of the box body 1 through a first bearing and extends to the inside of the box body 1. The outer surfaces of the filter screen 3110 and the filter housing 3107 are both fixedly connected to the inner wall of the box body 1. The bottom end outer surface of the output shaft of the motor 3101 rotatably penetrates through the top surface of the filter screen 3110 through a second bearing and extends below the filter screen 3110. The first stirring plate 3102 is slidably sleeved on the outer surface of the output shaft of the motor 3101. The second stirring plate 3103 is fixedly sleeved on the outer surface of the output shaft of the motor 3101. The inner wall of the spiral feeding plate 3105 is adapted to the inner wall of the filter housing 3107. A support rod is fixedly connected to the bottom end outer surface of the output shaft of the motor 3101, and the bottom surface of the support rod is fixedly connected to the inner wall of the spiral feeding plate 3105. The top surface of the third discharge pipe 5 extends to the inside of the filter housing 3107 and is fixedly connected to the inner wall of the filter housing 3107;

[0034] A first guiding plate 3104 is sleeved on the outer side of the output shaft of the motor 3101. The top surface of the first guiding plate 3104 is fixedly connected to the bottom surface of the filter screen 3110. By arranging the motor 3101, the second stirring plate 3103, the first guiding plate 3104, the spiral feeding plate 3105, the second guiding plate 3106, the filter housing 3107, and the filter screen 3110, fertilizers are poured into the inside of the box body 1. The fertilizers are sieved twice by the filter screen 3110 and the filter housing 3107. The motor 3101 is started, and the motor 3101 drives the second stirring plate 3103 to rotate, so that the second stirring plate 3103 stirs the fertilizers above the filter screen 3110, facilitating the small-particle fertilizers to pass through the filter screen 3110. The spiral feeding plate 3105 is driven to rotate by the output shaft of the motor 3101, so that the fertilizers falling inside the filter housing 3107 are conveyed upward along the inner wall of the filter housing 3107. During the upward movement of the fertilizers, the small-particle fertilizers pass through the filter housing 3107 and fall downward. By using the first guiding plate 3104, it is avoided that the fertilizers passing through the filter screen 3110 directly fall onto the spiral feeding plate 3105, and it is avoided that the small-particle fertilizers fall inside the third discharge pipe 5;

[0035] A connecting rod 3108 is hinged to the bottom surface of the first stirring plate 3102. A through groove is formed in the top surface of the second stirring plate 3103. A sliding rod 3112 is fixedly connected to the inner wall of the through groove. A fourth magnetic block 3113 is slidably sleeved on the outer surface of the sliding rod 3112. The bottom surface of the connecting rod 3108 is hinged to the top surface of the fourth magnetic block 3113. An elastic plate 3111 is fixedly connected to the inner wall of the through groove. The outer surface of the elastic plate 3111 is fixedly connected to the outer surface of the fourth magnetic block 3113. A groove is formed in the inner wall of the box body 1. A first magnetic block 3109 is fixedly connected to the inner wall of the groove. The end faces of the first magnetic block 3109 and the fourth magnetic block 3113 on the side close to each other repel each other. By providing the first stirring plate 3102, the connecting rod 3108, the first magnetic block 3109, the elastic plate 3111, the sliding rod 3112 and the fourth magnetic block 3113, during the rotation of the second stirring plate 3103, the first magnetic block 3109 intermittently pushes the fourth magnetic block 3113 to slide along the outer surface of the sliding rod 3112, so that the fourth slider 3113 drives the connecting rod to move, and the connecting rod pulls the first stirring plate 3102 to move up and down, expanding the stirring range of the first stirring plate 3102 and further accelerating the screening of small-particle fertilizers; Embodiment 2

[0036] As Figures 1-4 shown, on the basis of Embodiment 1, an auxiliary part 32 is provided outside the box body 1;

[0037] The auxiliary part 32 includes a first conduit 3204, a second conduit 3208, a knocking block 3206, a third stirring plate 3214, two second magnetic blocks 3201 and two third magnetic blocks 3203. The two second magnetic blocks (3201) are respectively arranged on the left and right sides of the first stirring plate (3102). The first stirring plate (3102) drives the second magnetic blocks (3201) to rotate. The bottom outer surface of the first conduit 3204 is fixedly and communicatively connected to the left end face of the box body 1. The two third magnetic blocks 3203 are respectively in sealed sliding connection with the inside of the first conduit 3204 and the inner wall of the second conduit 3208. A first elastic member 3202 is fixedly connected to the outer surface of the left third magnetic block 3203. The outer surface of the first elastic member 3202 is fixedly connected to the inner wall of the first conduit 3204. The left outer surface of the knocking block 3206 extends into the first conduit 3204 and is slidably connected to the inner wall of the first conduit 3204;

[0038] The left end face of the knocking block 3206 is fixedly connected with a second elastic member 3205, and the left end of the second elastic member 3205 is fixedly connected with the inner wall of the first conduit 3204. By providing the second magnet 3201, the first elastic member 3202, the third magnet 3203, the first conduit 3204, the second elastic member 3205, and the knocking block 3206, during the process of the second stirring plate 3103 driving the second magnet 3201 to rotate, the second magnet 3201 intermittently pushes the third magnet 3203 on the left side to move, so that the air inside the first conduit 3204 is compressed, and the compressed gas pushes the knocking block 3206 to move, causing the right end of the knocking block 3206 to knock the first material guiding plate 3104, preventing fertilizer particles from accumulating on the top surface of the first material guiding plate 3104 due to friction, assisting in the filtration of fertilizers, and accelerating the filtration efficiency of the device; Embodiment III

[0039] As Figures 1-7 As shown in the figure, on the basis of Embodiment I, the outer surface of the third discharge pipe 5 is rotatably sleeved with a third stirring plate 3214 through a third bearing. The bottom surface of the third stirring plate 3214 is fixedly connected with a bevel gear ring 3213. A rotating shaft 3210 is arranged on the right side of the box body 1. The left end outer surface of the rotating shaft 3210 rotatably penetrates through the right end face of the box body 1 through a fourth bearing and extends to the inside of the box body 1. A bevel gear 3215 is fixedly sleeved on the left end outer surface of the rotating shaft 3210. The outer surface of the bevel gear 3215 is meshed and connected with the outer surface of the bevel gear ring 3213. The right end face of the third magnet 3203 on the right side is fixedly connected with a third elastic member 3207, and the right end of the third elastic member 3207 is fixedly connected with the inner wall of the second conduit 3208;

[0040] The inner wall of the second conduit 3208 is hermetically and slidably connected with a piston 3209. The bottom surface of the piston 3209 is hinged with a swing rod, and the bottom end of the swing rod is rotatably connected with a rotating rod through a pin. The right end face of the rotating shaft 3210 is fixedly connected with the outer surface of the rotating rod. By providing the second magnet 3201, the third magnet 3203, the third elastic member 3207, the second conduit 3208, the piston 3209, the rotating shaft 3210, the fixing plate 3211, the bevel gear ring 3212, the third stirring plate 3214, and the bevel gear 3215, during the process of the second stirring plate 3103 driving the second magnet 3201 to rotate, the second magnet 3201 intermittently pushes the third magnet 3203 on the right side to move, so that the air inside the second conduit 3208 is compressed, and the compressed gas pushes the piston 3209 to move up and down. The piston 3209 drives the rotating shaft 3210 to rotate. By using the bevel gear 3215 and the bevel gear ring 3213, the third stirring plate 3214 rotates, facilitating the small fertilizer particles inside the box body 1 to be discharged from the box body 1 through the second discharge pipe 4, and assisting the discharging device of the device.

[0041] Next, the working principle of the screening device for the production and processing of biological fertilizers that is convenient for taking and placing materials will be specifically described.

[0042] In use, pour the fertilizer into the interior of the box body 1, start the motor 3101, the motor 3101 drives the second stirring plate 3103 to rotate, so that the second stirring plate 3103 stirs the fertilizer above the filter screen 3110. At the same time, during the rotation of the second stirring plate 3103, the first magnet 3109 intermittently pushes the fourth magnet 3113 to slide along the outer surface of the slide bar 3112, so that the fourth slider 3113 drives the connecting rod to move, and the connecting rod pulls the first stirring plate 3102 to move up and down, so that the medium and small particle fertilizers pass through the filter screen 3110, and the medium and small fertilizer particles slide along the first guide plate 3104, so that the medium and small fertilizer particles are dispersed outside the spiral feeding plate 3105. The output shaft of the motor 3101 drives the spiral feeding plate 3105 to rotate, so that the medium and small fertilizers slide upward along the inner wall of the filter shell 3107. During this period, the small particle fertilizers pass through the filter shell 3107 and fall downward, and the medium-sized fertilizer particles move to the middle top of the filter shell 3107 and fall into the third discharge pipe 5. During the rotation of the second stirring plate 3103 driving the second magnet 3201, the second magnet 3201 intermittently pushes the left third magnet 3203 to move leftward, so that the air inside the first conduit 3204 is compressed, and the compressed gas pushes the knocking block 3206 to move, so that the right end of the knocking block 3206 knocks the first guide plate 3104, and the clamped fertilizer particles slide on the first guide plate 3104. At the same time, the second magnet 3201 intermittently pushes the right third magnet 3203 to move rightward, so that the air inside the second conduit 3208 is compressed, and the compressed gas pushes the piston 3209 to move up and down, and the piston 3209 drives the rotating shaft 3210 to rotate. By using the bevel gear 3215 and the bevel gear ring 3213, the rotating shaft 3210 drives the third stirring plate 3214 to rotate, which is convenient for the small fertilizer particles inside the box body 1 to be discharged from the box body 1 through the second discharge pipe 4.

[0043] The above generally describes the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, the modifications or improvements made without departing from the spirit of the present invention are all within the protection scope of the present invention.

Claims

1. A multi-stage screening device for fertilizer production, comprising a box body (1), characterized in that: A first discharge pipe (2), a second discharge pipe (4) and a third discharge pipe (5) are fixedly and penetratingly connected to the outer surface of the box body (1). A screening device (3) is arranged inside the box body (1), and the screening device (3) includes a power part (31). The power part (31) includes a motor (3101), a filter screen (3110), a second stirring plate (3103), a first stirring plate (3102), a filter housing (3107) and a spiral feeding plate (3105). The bottom surface of the motor (3101) is fixedly connected to the top surface of the box body (1). The outer surface of the output shaft of the motor (3101) rotatably penetrates through the top surface of the box body (1) through a first bearing and extends to the inside of the box body (1). The outer surfaces of the filter screen (3110) and the filter housing (3107) are both fixedly connected to the inner wall of the box body (1). The bottom surface of the output shaft of the motor (3101) rotatably penetrates through the top surface of the filter screen (3110) through a second bearing and extends below the filter screen (3110). The first stirring plate (3102) is slidably sleeved on the outer surface of the output shaft of the motor (3101). The second stirring plate (3103) is fixedly sleeved on the outer surface of the output shaft of the motor (3101). The second stirring plate (3103) stirs the fertilizer above the filter screen (3110). The inner wall of the spiral feeding plate (3105) is adapted to the inner wall of the filter housing (3107). A support rod is fixedly connected to the outer surface of the bottom end of the output shaft of the motor (3101), and the bottom surface of the support rod is fixedly connected to the inner wall of the spiral feeding plate (3105). A connecting rod (3108) is hinged to the bottom surface of the first stirring plate (3102). A through groove is formed in the top surface of the second stirring plate (3103), and a sliding rod (3112) is fixedly connected to the inner wall of the through groove. A fourth magnetic block (3113) is slidably sleeved on the outer surface of the sliding rod (3112). The bottom surface of the connecting rod (3108) is hinged to the top surface of the fourth magnetic block (3113). An elastic plate (3111) is fixedly connected to the inner wall of the through groove. The outer surface of the elastic plate (3111) is fixedly connected to the outer surface of the fourth magnetic block (3113). A groove is formed in the inner wall of the box body (1), and a first magnetic block (3109) is fixedly connected to the inner wall of the groove. The end faces of the first magnetic block (3109) and the fourth magnetic block (3113) on the side close to each other repel each other. The top surface of the third discharge pipe (5) extends into the inside of the filter housing (3107) and is fixedly connected to the inner wall of the filter housing (3107). A first guiding plate (3104) is sleeved on the outer side of the output shaft of the motor (3101). The top surface of the first guiding plate (3104) is fixedly connected to the bottom surface of the filter screen (3110). By using the first guiding plate (3104), it is avoided that the fertilizer passing through the filter screen (3110) directly falls onto the spiral feeding plate (3105), and it is avoided that small-particle fertilizer falls into the inside of the third discharge pipe (5). An auxiliary part (32) is arranged outside the box body (1). The auxiliary part (32) includes a first conduit (3204), a second conduit (3208), a knocking block (3206), a third stirring plate (3214), two second magnetic blocks (3201) and two third magnetic blocks (3203). The two second magnetic blocks (3201) are respectively arranged on the left and right sides of the first stirring plate (3102). The first stirring plate (3102) drives the second magnetic blocks (3201) to rotate. The outer surface of the bottom end of the first conduit (3204) is fixedly and communicatively connected to the left end face of the box body (1). The two third magnetic blocks (3203) are respectively in sealed sliding connection with the inner part of the first conduit (3204) and the inner wall of the second conduit (3208). The outer surface of the left third magnetic block (3203) is fixedly connected with a first elastic member (3202), and the outer surface of the first elastic member (3202) is fixedly connected to the inner wall of the first conduit (3204). The left end outer surface of the knocking block (3206) extends into the first conduit (3204) and is in sliding connection with the inner wall of the first conduit (3204). The outer surface of the third discharge pipe (5) is rotatably sleeved with a third stirring plate (3214) through a third bearing. The bottom surface of the third stirring plate (3214) is fixedly connected with a bevel gear ring (3213). A rotating shaft (3210) is arranged on the right side of the box body (1). The left end outer surface of the rotating shaft (3210) rotatably penetrates through the right end face of the box body (1) through a fourth bearing and extends to the inner side of the box body (1). The left end outer surface of the rotating shaft (3210) is fixedly sleeved with a bevel gear (3215). The outer surface of the bevel gear (3215) is meshed with the outer surface of the bevel gear ring (3213). A piston (3209) is in sealed sliding connection with the inner wall of the second conduit (3208). The bottom surface of the piston (3209) is hinged with a swing rod, and the bottom end of the swing rod is rotatably connected with a rotating rod through a pin. The right end face of the rotating shaft (3210) is fixedly connected to the outer surface of the rotating rod. The left end face of the knocking block (3206) is fixedly connected with a second elastic member (3205), and the left end of the second elastic member (3205) is fixedly connected to the inner wall of the first conduit (3204). The right end face of the right third magnetic block (3203) is fixedly connected with a third elastic member (3207), and the right end of the third elastic member (3207) is fixedly connected to the inner wall of the second conduit (3208). During the process that the first stirring plate (3102) drives the second magnetic blocks (3201) to rotate, the second magnetic blocks (3201) intermittently push the left third magnetic block (3203) to move leftward, so that the right end of the knocking block (3206) knocks the first material guiding plate (3104). At the same time, the second magnetic blocks (3201) intermittently push the right third magnetic block (3203) to move rightward, so that the rotating shaft (3210) drives the third stirring plate (3214) to rotate.

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