Screening device for pesticide fertilizer production

Abstract

The screening device for pesticide and fertilizer production comprises a base and a screening box, a screening plate frame is installed in the screening box through spring hooks, a vibration motor is installed at the high end of the screening plate frame, a feeding port is formed in the top face, right opposite to the high end of a first screen, of the screening box, and a discharging port is formed in the bottom face, right opposite to the low end of the first screen, of the screening box and connected with a discharging pipe. A collecting box is installed on the base, a through opening is formed in the top face of the collecting box, a centrifugal barrel is rotationally installed in the through opening, the upper end face of the centrifugal barrel is rotationally sleeved with a discharging pipe, and the lower end face of the centrifugal barrel is connected with a rotating shaft. A second screen is embedded in the peripheral wall of the lower part, located in the collecting box, of the centrifugal barrel, and the collecting box and the centrifugal barrel are movably connected with material taking doors respectively. Multi-stage screening can be achieved through the vibrating screen and the centrifugal screen, fertilizers with different particle sizes are effectively screened, meanwhile, the blockage phenomenon caused by the fertilizers in the screening process is avoided, and the fertilizer screening effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer processing and production, in particular to a screening device for medicinal fertilizer production. Background Art

[0002] Solid fertilizers need to be granulated after processing. After granulation, the lumps and broken small particles between the granular fertilizers need to be screened and removed so that the fertilizer granules of normal specifications can be packaged and processed later.

[0003] When screening existing granular fertilizers, the flow of materials is generally used to remove the debris between the granular fertilizers, or the debris and small particles between the fertilizers are removed by mechanical stirring. However, when screening the granular fertilizers by these methods, although large particles and agglomerated fertilizers can be screened out, some granular fertilizers smaller than the normal particle size will still remain in the remaining granular fertilizers. During screening, the small granular fertilizers and the debris will be filtered together with the normal particles, which is not convenient for step-by-step extraction from the screening device, thus affecting the subsequent processing of the granular fertilizers.

[0004] In addition, when screening granular fertilizers, the screen plate and the discharge pipe are prone to clogging after long-term use, and manual cleaning is more troublesome, affecting the screening efficiency. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a screening device for medicinal fertilizer production, which uses a vibrating screen and a centrifugal screen to achieve multi-stage screening, effectively screening fertilizers of different particle sizes, separating large agglomerated particles and small particles, and at the same time avoiding clogging of fertilizers during the screening process, thereby improving the fertilizer screening effect.

[0006] The utility model is achieved through the following technical solutions:

[0007] A screening device for the production of pesticides and fertilizers is provided, comprising a base, a screening box arranged obliquely installed on the base through a support frame, screen plates arranged obliquely and inlaid with a first screen mesh hung in the screening box by spring hooks, a vibration motor being installed at the high end of the screen plates, a feed port being provided on the top surface of the screening box facing the high end of the first screen mesh, a discharge port being provided on the bottom surface of the screening box facing the low end of the first screen mesh and connected to a discharge pipe, a collecting box being installed below the screening box on the base through supporting legs, a through opening being provided on the top surface of the collecting box, and a centrifugal cylinder having an inverted cone shape facing the discharge pipe and being rotatably installed in the through opening, the upper end surface of the centrifugal cylinder being rotatably sleeved on the discharge pipe, the lower end surface of the centrifugal cylinder being connected to a rotating shaft, a centrifugal motor being installed between the base and the bottom of the collecting box, the driving shaft of the centrifugal motor being connected to the rotating shaft, a second screen mesh being inlaid on the peripheral wall of the lower part of the centrifugal cylinder in the collecting box, and a material taking door being movably connected to the collecting box and the centrifugal cylinder.

[0008] Furthermore, the middle part of the discharge pipe is an elastic telescopic tube, and the bottom surface of the screening box is vertically connected to a limit plate on one side of the discharge pipe. The lower end of the discharge pipe is horizontally hinged to a push-pull rod facing the circumference of the limit plate. One end of the push-pull rod slides through the limit plate and fixes the limit block on one side of the limit plate. The push-pull rod is provided with a connecting spring between the limit block and the limit plate. The bottom surface of the screening box is vertically connected to a rotating shaft driven by the discharge motor on one side of the limit plate, and the lower end of the rotating shaft is connected to a cam facing the push-pull rod and can contact and cooperate with the push-pull rod.

[0009] The middle part of the discharge pipe is designed as an elastic telescopic tube. The discharge motor drives the cam to rotate, and the cam intermittently squeezes the push-pull rod. The push-pull rod and the spring can drive the elastic telescopic tube to move back and forth, thereby accelerating the flow of fertilizer inside, which is used to prevent discharge blockage and ensure smooth discharge.

[0010] Furthermore, the unloading motor is installed on the bottom surface of the screening box through a mounting seat, and the driving shaft of the unloading motor is connected to the rotating shaft through a bevel gear pair.

[0011] The blanking motor is engaged with the bevel gear on the rotating shaft through the bevel gear to form a transmission. The blanking motor can be used to drive the rotating shaft to rotate, thereby driving the cam to rotate.

[0012] Furthermore, the diameter of the mesh holes of the first sieve is larger than the diameter of the mesh holes of the second sieve.

[0013] The sieve holes of the first sieve are larger than those of the second sieve, which can facilitate multi-stage screening and filtration of the fertilizer particles and screen out small particles that do not meet the requirements.

[0014] Furthermore, slide grooves are respectively provided on the two long sides of the screen frame in the length direction, and double-sided racks are provided in the slide grooves. Fixed plates are provided on both sides of the length direction of the screen frame. The upper roller brush and the lower roller brush located above and below the first screen and in contact with the first screen are rotatably connected between the two fixed plates through the upper rotating shaft and the lower rotating shaft respectively. The upper rotating shaft and the lower rotating shaft are connected with gears meshing with the corresponding rack surfaces between the roller brushes and the fixed plates. The two fixed plates are connected by a connecting plate above the upper roller brush, and a driving mechanism connected to the upper roller brush for transmission is installed on the connecting plate.

[0015] The driving mechanism can rotate the upper roller brush, and the upper roller brush can drive the lower roller brush to rotate at the same time by meshing with the gear and the double-sided rack, so that the upper roller brush and the lower roller brush can move along the slide groove of the screen plate frame. The lower roller brush can push out the fertilizer stuck on the sieve holes of the first screen during the rolling process, and the upper roller brush can sweep out the pushed-out fertilizer, thereby cleaning the first screen and effectively preventing the first screen from being blocked.

[0016] Furthermore, the driving mechanism includes a dual-axis motor installed on the connecting plate, and the two driving shafts of the dual-axis motor are rotatably connected to the fixed plates on both sides. A driven pulley is also installed on the upper rotating shaft between the upper roller brush and the gear. A driving pulley is installed at each driven pulley corresponding to the driving shaft, and the driving pulley and the driven pulley are connected by a synchronous belt.

[0017] The two driving shafts of the dual-axis motor are respectively rotatably installed on the fixed plates on both sides. The active pulley installed on the driving shaft is transmitted to the driven pulley on the upper rotating shaft through a synchronous belt. The dual-axis motor can be used to drive the upper rotating shaft to drive the upper roller brush to automatically sweep the first screen along the plane of the screen plate frame.

[0018] Furthermore, a discharge port is provided at the lower end of the screen plate frame corresponding to the side wall of the screening box, and a discharge guide plate is installed at the discharge port along the inclination direction of the screen plate frame.

[0019] A discharge port is provided at the lower end of the screen frame, which can first discharge large-particle fertilizers and agglomerated fertilizers that do not meet the requirements out of the screening box through the discharge port and the discharge guide plate.

[0020] Beneficial effects of the utility model:

[0021] The utility model adopts vibration screening and centrifugal screening to achieve multi-stage screening in the production of pesticide fertilizers, and effectively screens fertilizers of different particle sizes. The discharge pipe is provided with a middle elastic telescopic tube, which cooperates with the anti-blocking mechanism provided on the bottom of the screening box. The discharge motor drives the push-pull rod to drive the elastic telescopic rod to move back and forth, ensuring the smooth progress of the material screening operation, avoiding the blockage of the fertilizer during the screening process, and greatly improving the screening effect of the fertilizer.

[0022] The screen plate frame is engaged with the double-sided rack through the gear, and the double-axis motor drive shaft drives the upper roller brush and the lower roller brush to rotate simultaneously to brush both sides of the first screen, so as to clean the first screen and avoid the material from clogging the screen holes of the first screen, which is conducive to ensuring the screening efficiency of the first screen and the stability of the screening quality, and ensuring the smooth progress of the material screening operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 This is a structural diagram of the screen plate frame in the utility model.

[0025] Figure 3 This is a schematic diagram of the installation structure of the upper roller brush and the lower roller brush in the utility model.

[0026] Figure 4 This is a schematic diagram of the meshing of the double-sided rack and the gear in the slideway of the present invention.

[0027] As shown in the figure:

[0028] 1. Base, 2. Support frame, 3. Screening box, 4. Screen plate frame, 5. Vibrating motor, 6. Feed inlet, 7. Upper hopper, 8. Spring hook, 9. Discharge guide plate, 10. Discharge pipe, 11. Centrifugal cylinder, 12. Second screen, 13. Limit plate, 14. Spring, 15. Limit block, 16. Push-pull rod, 17. Rotating shaft, 18. Cam, 19. Bevel gear pair, 20. Discharge motor, 21. Collecting box, 22. Rotating shaft, 23. Centrifugal motor, 24. Reclaiming door, 25. Fixed plate, 26. Slide, 27. First screen, 28. Double-sided rack, 29. Upper rotating shaft, 30. Gear, 31. Upper roller brush, 32. Lower roller brush, 33. Dual-axis motor, 34. Synchronous belt, 35. Connecting plate, 36. Driving pulley, 37. Driven pulley, 38. Lower rotating shaft. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0030] A screening device for the production of pesticide fertilizers includes a base 1, on which an inclined screening box 3 is installed through a support frame 2, and in which a screen plate frame 4 with an inclined setting and inlaid with a first screen 27 is hung and installed respectively through spring hooks 8 in the screening box 3. A vibration motor 5 is installed at the higher end of the screen plate frame 4, and a discharge port is opened at the lower end of the screen plate frame 4 corresponding to the side wall of the screening box 3, and a discharge guide plate 9 is installed at the discharge port along the inclined direction of the screen plate frame 4.

[0031] The top surface of the screening box 3 is provided with a feed port 6 facing the high end of the first screen 27. In order to facilitate loading, a hopper 7 is installed at the feed port 6. The fertilizer particles to be screened can be transferred to the hopper 7 by using a conveying auger, and the feed port 6 is placed on the first screen 27 in the screening box 3. The bottom surface of the screening box 3 is provided with a discharge port facing the lower end of the first screen 27 and connected to the discharge pipe 10. A collecting box 21 located below the screening box 3 is installed on the base 1 through a supporting leg, and a through opening is provided on the top surface of the collecting box 21 and a through hole is rotatably installed in the through hole to connect to the discharge pipe 10. The centrifugal cylinder 11 is opposite and in an inverted cone shape, and the upper end face of the centrifugal cylinder 11 is rotatably sleeved on the discharge pipe 10. The lower end face of the centrifugal cylinder 11 is connected with a rotating shaft 22. A centrifugal motor 23 is installed between the base 1 and the bottom of the collecting box 21. The drive shaft of the centrifugal motor 23 is connected to the rotating shaft 22. The second screen 12 is inlaid on the peripheral wall of the lower part of the centrifugal cylinder 11 in the collecting box 21. The sieve hole diameter of the first screen 27 is larger than the sieve hole diameter of the second screen 12. The collecting box 21 and the centrifugal cylinder 11 are respectively movably connected with a material taking door 24.

[0032] The middle part of the feeding tube 10 is an elastic telescopic tube. The bottom surface of the screening box 3 is vertically connected to a limit plate 13 on one side of the feeding tube 10. The lower end of the feeding tube 10 is horizontally hinged to a push-pull rod 16 on the circumference of the limit plate 13. One end of the push-pull rod 16 slides through the limit plate 13 and fixes a limit block 15 on one side of the limit plate 13. The push-pull rod 16 is provided with a connecting spring 14 between the limit block 15 and the limit plate 13. The bottom surface of the screening box 3 is vertically rotatably connected to a rotating shaft 17 driven by the feeding motor 20 on one side of the limit plate 13. The lower end of the rotating shaft 17 is connected to a cam 18 that is opposite to the push-pull rod 16 and can contact and cooperate with the push-pull rod 16. The feeding motor 20 is installed on the bottom surface of the screening box 3 through a mounting seat. The drive shaft of the feeding motor 20 and the rotating shaft 17 are connected through a bevel gear pair 19.

[0033] The two long sides of the screen frame 4 in the length direction are respectively provided with a slide groove 26, and a double-sided rack 28 is provided in the slide groove 26. A fixed plate 25 is provided on both sides of the length direction of the screen frame 4. The two fixed plates 25 are respectively rotatably connected with an upper roller brush 31 and a lower roller brush 32 located above and below the first screen 27 and in contact with the first screen 27 through an upper rotating shaft 29 and a lower rotating shaft 38. The upper rotating shaft 29 and the lower rotating shaft 38 are connected with a gear 30 meshing with the corresponding rack surface between the roller brush and the fixed plate 25. The two fixed plates 25 are connected by a connecting plate 35 above the upper roller brush 31, and a driving mechanism connected to the upper roller brush 31 for transmission is installed on the connecting plate 35.

[0034] Among them: the driving mechanism includes a dual-axis motor 33 installed on the connecting plate 35, the two driving shafts of the dual-axis motor 33 are respectively connected to the fixed plates 25 on both sides for rotation, and the upper rotating shaft 29 is also equipped with a driven pulley 37 between the upper roller brush 31 and the gear 30, and the driving shaft is equipped with a driving pulley 36 corresponding to each driven pulley 37, and the driving pulley 36 and the driven pulley 37 are connected by a synchronous belt 34.

[0035] The working process of this utility model:

[0036] Start the conveying auger, and convey the fertilizer particles to be screened into the upper hopper 7 through the conveying auger, and enter the screening box 3 through the feeding port 6. Start the vibration motor 5, and the vibration motor 5 cooperates with the long and short spring hooks 8 to drive the screen frame 4 to vibrate up and down. The fertilizer particles enter from the high end of the screen frame 4 and flow downward. At the same time, they pass through the vibration filtration of the first screen 27. The fertilizer particles that meet the requirements are filtered and fall under the screening box 3, and flow obliquely along the bottom surface of the screening box 3 to the discharge port. The fertilizer particles that do not meet the requirements, such as lumps or large particles, are screened by the first screen 27 of the screen frame 4 and accumulated to the discharge port on the side wall of the screening box 3, and are discharged from the screening box 3 through the discharge guide plate 9.

[0037] The fertilizer particles that have been vibrated and screened are discharged downward into the centrifugal cylinder 11 through the discharge pipe 10 at the discharge port. In order to prevent the material from accumulating and clogging at the discharge port, the discharge motor 20 can be started, and the driving shaft of the discharge motor 20 cooperates with the bevel gear pair 19 to drive the rotating shaft 17 to rotate, and the rotating shaft 17 drives the cam 18 to rotate. The cam 18 intermittently squeezes the push-pull rod 16, and the push-pull rod 16 cooperates with the spring 14 to reciprocate and pull the elastic shrinkage tube in the discharge pipe 10, thereby driving the elastic shrinkage tube to move back and forth, so as to ensure smooth discharge.

[0038] The medicinal fertilizer particles flowing into the centrifugal barrel 11 through the discharge pipe 10 can be separated by centrifugal operation. The centrifugal motor 23 can drive the centrifugal barrel 11 to rotate at high speed through the rotating shaft 22, and the medicinal fertilizer particles entering the centrifugal barrel 11 can be centrifuged. Fertilizer particles such as small particles or powder materials that do not meet the particle size requirements can be centrifugally separated and screened by the second screen 12 and enter the collecting box 21 from the centrifugal barrel 11, while the medicinal fertilizer particles that meet the requirements can be retained in the centrifugal barrel 11. By opening the collecting box 21 and the material taking door 24 on the centrifugal barrel 11, the material can be easily taken out.

[0039] After a long period of screening, the first screen 27 is prone to clogging. In order to facilitate the cleaning of the first screen 27, the dual-axis motor 33 can be started, and the two drive shafts of the dual-axis motor 33 can be used to drive the active pulley 36 to rotate respectively. The active pulley 36 cooperates with the synchronous belt 34 to drive the driven pulley 37 to rotate, thereby making the upper rotating shaft 39 below the connecting plate 35 rotate synchronously, thereby driving the upper roller brush 31 to rotate, and the gear 30 on the upper rotating shaft 29 rotates and engages with the double-sided rack 28 at the same time, and can move along the length direction of the double-sided rack 28 while rotating. At the same time, it drives the lower rotating shaft 38 and the lower roller brush 32 on the lower rotating shaft 38 to passively roll, which can realize the brushing of the upper and lower surfaces of the first screen 27. The dual-axis motor 33 controls the reciprocating movement of the two roller brushes, which can improve the cleaning effect, realize automatic cleaning of the first screen 27, and effectively prevent the first screen 27 from being blocked.

[0040] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A screening device for producing pesticide fertilizers, comprising a base, a screening box mounted obliquely on the base via a support frame, a screen plate frame mounted obliquely and inlaid with a first screen mesh suspended in the screening box via spring hooks, a vibration motor mounted at the top end of the screen plate frame, and characterized by: A feed port is provided on the top surface of the screening box facing the high end of the first screen, a discharge port is provided on the bottom surface of the screening box facing the low end of the first screen and is connected to the discharge pipe, a collecting box located below the screening box is installed on the base through supporting legs, and a through opening is provided on the top surface of the collecting box and a centrifugal cylinder facing the discharge pipe and in an inverted cone is rotatably installed in the through opening, the upper end surface of the centrifugal cylinder is rotatably sleeved on the discharge pipe, the lower end surface of the centrifugal cylinder is connected to a rotating shaft, a centrifugal motor is installed between the base and the bottom of the collecting box, the driving shaft of the centrifugal motor is connected to the rotating shaft, the second screen is inlaid on the peripheral wall of the lower part of the centrifugal cylinder in the collecting box, and a feeding door is movably connected to the collecting box and the centrifugal cylinder respectively.

2. The screening device for producing medicinal fertilizer according to claim 1, characterized in that: The middle part of the discharge pipe is an elastic telescopic tube. The bottom surface of the screening box is vertically connected to a limit plate on one side of the discharge pipe. The lower end of the discharge pipe is horizontally hinged to a push-pull rod facing the circumference of the limit plate. One end of the push-pull rod slides through the limit plate and fixes the limit block on one side of the limit plate. The push-pull rod is provided with a connecting spring between the limit block and the limit plate. The bottom surface of the screening box is vertically connected to a rotating shaft driven by the discharge motor on one side of the limit plate. The lower end of the rotating shaft is connected to a cam facing the push-pull rod and can contact and cooperate with the push-pull rod.

3. The screening device for producing medicinal fertilizer according to claim 2, characterized in that: The unloading motor is installed on the bottom surface of the screening box through a mounting base, and the driving shaft of the unloading motor is connected with the rotating shaft through a bevel gear pair.

4. The screening device for producing medicinal fertilizer according to claim 1, characterized in that: The mesh diameter of the first sieve is larger than the mesh diameter of the second sieve.

5. The screening device for producing medicinal fertilizer according to claim 1, characterized in that: The two long sides of the screen frame in the length direction are respectively provided with slide grooves, and double-sided racks are provided in the slide grooves. Fixed plates are provided on both sides of the length direction of the screen frame. The upper roller brush and the lower roller brush located above and below the first screen and in contact with the first screen are rotatably connected between the two fixed plates through the upper rotating shaft and the lower rotating shaft respectively. The upper rotating shaft and the lower rotating shaft are connected with gears meshing with the corresponding rack surfaces between the roller brushes and the fixed plates. The two fixed plates are connected by a connecting plate above the upper roller brush, and a driving mechanism connected to the upper roller brush for transmission is installed on the connecting plate.

6. The screening device for producing medicinal fertilizer according to claim 5, characterized in that: The driving mechanism includes a dual-axis motor installed on a connecting plate. The two driving shafts of the dual-axis motor are rotatably connected to the fixed plates on both sides. A driven pulley is also installed on the upper rotating shaft between the upper roller brush and the gear. A driving pulley is installed at each driven pulley of the driving shaft, and the driving pulley and the driven pulley are connected by a synchronous belt.

7. The screening device for producing medicinal fertilizer according to claim 1, characterized in that: A discharge port is provided at the lower end of the screen plate frame corresponding to the side wall of the screening box, and a discharge guide plate is installed at the discharge port along the inclined direction of the screen plate frame.

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