Screening device capable of stirring fertilizer

Abstract

The utility model relates to the technical field of fertilizer production, and discloses a screening device capable of stirring fertilizers, which comprises a screening machine, a collecting box is slidably mounted at the lower part of the interior of the screening machine, a feeding hole is formed in the top of the screening machine, and a stirring device is mounted in the collecting box. A hopper is fixedly installed on the outer wall of the feeding port, a supporting plate is fixedly installed on the outer wall of the screening machine, a motor is fixedly installed on the upper surface of the supporting plate, a roller shaft is fixedly installed at the output end of the motor, and movable grooves are formed in the side walls of the two ends of the screening machine. When the roller shaft rotates, the reciprocating screw rod is driven to rotate through the transmission belt, so that the sliding block in threaded connection with the outer wall of the reciprocating screw rod slides in the screening machine in a reciprocating manner, and meanwhile, the shifting rod is driven to slide in the material box to shift the fertilizer accumulated on the material box, so that the fertilizer can be uniformly spread on the material box, and the discharging of the material box is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer production, in particular to a screening device capable of shifting fertilizers. Background Art

[0002] Fertilizer refers to a type of substance that provides one or more essential nutrients for plants, improves soil properties and increases soil fertility levels. It is one of the material bases of agricultural production and mainly includes ammonium phosphate fertilizers, large-element water-soluble fertilizers, medium-element fertilizers, biological fertilizers, organic fertilizers, multi-dimensional field energy concentrated organic fertilizers, etc. When storing fertilizers, attention should be paid to preventing moisture and deterioration, avoiding sunlight, preventing volatilization loss, and preventing corrosion and poisoning.

[0003] When fertilizers are used in different scenarios, they need to be screened and filtered to select fertilizer particles of different sizes for storage and use. Existing fertilizer screening is usually performed through a screen. During the screening process, the fertilizer needs to be moved to allow the fertilizer to obtain a larger screening area on the screen. Most of the existing screens do not have the function of automatic material selection. Usually, staff use tools or manual methods to select materials, which is very time-consuming and labor-intensive. In addition, the existing screening equipment easily causes the screen to become blocked if too much fertilizer is added at one time, resulting in the inability to screen. Utility Model Content

[0004] The purpose of the utility model is to provide a screening device capable of moving fertilizers, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a screening device capable of shifting fertilizers, comprising a screening machine, a collecting box is slidably installed at the lower part of the interior of the screening machine, and the screened fertilizers can be collected by setting the collecting box, a feeding port is opened at the top of the screening machine, a hopper is fixedly installed on the outer wall of the feeding port, and the fertilizer is poured into the feeding port through the hopper, a supporting plate is fixedly installed on the outer wall of the screening machine, a motor is fixedly installed on the upper surface of the supporting plate, a roller is fixedly installed on the output end of the motor, and a starter motor is started. The machine drives the roller to rotate, and movable grooves are provided on the side walls at both ends of the screening machine. A feeding mechanism is arranged inside the screening machine, and the fertilizer can be evenly sprinkled on the screening plate by setting the feeding mechanism. A toggle mechanism is arranged inside the screening machine, and the fertilizer accumulated on the material box can be evenly spread by setting the toggle mechanism. A limiting mechanism is arranged inside the screening machine, and the opening and closing of the feed port can be controlled by setting the limiting mechanism. A screening mechanism is arranged inside the screening machine, and the fertilizer can be screened by the screening mechanism. The feeding mechanism includes:

[0006] A transmission rod is rotatably mounted on the inner wall of the support plate, and the drive belt and the turntable can be driven to rotate by arranging the transmission rod;

[0007] A driving bevel gear, which is fixedly mounted on the outer wall of the roller shaft, and can drive the driven bevel gear to rotate;

[0008] The driven bevel gear is fixedly mounted on the outer wall of the transmission rod, and the driven bevel gear is meshed and connected with the driving bevel gear. The driving bevel gear and the driven bevel gear can be arranged to drive the transmission rod to rotate.

[0009] Preferably, a slide bar is fixedly mounted on the inner wall of the screening machine, and the number of the slide bars is two groups. A material box is slidably mounted on the outer wall of the slide bar, and a plurality of through holes are provided on the material box. The slide bar can be provided to enable the material box to slide back and forth.

[0010] Preferably, both ends of the transmission rod pass through the support plate and are fixedly mounted with a turntable, the outer wall of the turntable is hinged with a connecting rod, the end of the connecting rod away from the turntable is hinged to the outer wall of the material box, and the end of the connecting rod close to the turntable makes a circular motion around the turntable. By arranging the turntable in conjunction with the connecting rod, the material box can slide back and forth on the outer wall of the sliding rod.

[0011] Preferably, the toggle mechanism includes a reciprocating screw, which is rotatably mounted on the inner wall of the screening machine, and the outer wall of the reciprocating screw is threadedly connected to a slider, and the outer wall of the slider is fixedly mounted with a lever, and the end of the lever away from the slider is attached to the inner wall of the material box. By arranging the reciprocating screw, the slider can slide back and forth inside the screening machine, and by arranging the lever, the fertilizer inside the material box can be toggled.

[0012] Preferably, the number of the reciprocating screw rods is two groups, and the reciprocating screw rods penetrate the screening machine and are connected to the roller shaft through a transmission belt, and the transmission belt can drive the reciprocating screw rods to rotate.

[0013] Preferably, the limiting mechanism includes a telescopic rod, which is fixedly mounted on the inner side wall of the screening machine, and a right-angle plate is fixedly mounted on the end of the telescopic rod away from the screening machine, and the right-angle plate fits the slider, and a baffle is fixedly mounted on the top of the right-angle plate, and the baffle fits the feed port. The right-angle plate can be set to drive the baffle to slide, and the opening and closing of the feed port can be controlled by setting the baffle.

[0014] Preferably, a limit spring is sleeved on the outer wall of the telescopic rod, one end of the limit spring is fixedly mounted on the inner wall of the screening machine, and the other end of the limit spring is fixedly mounted on the inner wall of the right-angle plate. The right-angle plate can be reset by setting the limit spring.

[0015] Preferably, the screening mechanism includes a fixed rod, which is fixedly mounted on the inner wall of the movable groove. The number of the fixed rods is four, and two of the fixed rods form a group and are mirror-mounted on the inner walls of the two movable grooves with the feed port as the center. A sieve plate is slidably mounted on the outer walls of the four fixed rods. A return spring is sleeved on the outer wall of the fixed rod, one end of the return spring is fixedly mounted on the top of the inner wall of the movable groove, and the other end of the return spring is fixedly mounted on the upper surface of the sieve plate. Both ends of the sieve plate are slidably mounted inside the movable groove, and the sieve plate is movably mounted in a 30° inclined manner inside the two movable grooves. The sieve plate can slide on the outer wall of the fixed rod by arranging the fixed rod, and the fertilizer can be screened by arranging the sieve plate, and the sieve plate can be reset by arranging the spring.

[0016] Preferably, a support rod is fixedly installed at one end of the support plate away from the motor, and the number of the support rods is two groups. Rotating rods are rotatably installed on the inner walls of the two groups of support rods, and a cam is fixedly installed on the outer wall of the rotating rod. The cam fits the outer wall of the screen plate, and the cam can be driven to rotate by setting the rotating rod, and the screen plate can be squeezed by setting the cam.

[0017] Preferably, both ends of the rotating rod pass through the support rod and are connected to the transmission rod through a driving belt, and the rotating rod can be driven to rotate by the driving belt.

[0018] Compared with the prior art, the utility model provides a screening device that can move fertilizers, which has the following beneficial effects:

[0019] 1. The screening device capable of shifting fertilizers starts a motor to drive the roller shaft to rotate, and the roller shaft drives the driving bevel gear to rotate, and cooperates with the driven bevel gear to drive the rotating rod and the turntable to rotate, so that one end of the connecting rod makes a circular motion on the outer wall of the turntable, and the other end of the connecting rod pushes and pulls the material box back and forth on the outer wall of the sliding rod, so that the material box achieves a reciprocating shaking effect, and the shaking of the material box can evenly sprinkle the fertilizer onto the screen plate through the through hole, which is beneficial to the screening of the screen plate.

[0020] 2. The screening device capable of moving the fertilizer will drive the reciprocating screw to rotate through the transmission belt while the roller shaft rotates, so that the slider threadedly connected to the outer wall of the reciprocating screw will slide back and forth inside the screening machine, and at the same time drive the lever to slide inside the material box, and move the fertilizer accumulated on the material box, so that the fertilizer can be evenly spread on the material box, thereby accelerating the discharge of the material box.

[0021] 3. The screening device that can move the fertilizer, when the slider reciprocates inside the screening machine, it will squeeze the right-angle plate, so that the right-angle plate drives the baffle to separate from the feed port. At this time, the fertilizer can enter the interior of the material box through the feed port. When the slider is separated from the squeezing of the right-angle plate, the tension of the limit spring drives the right-angle plate and the baffle to reset, blocking the feed port. The fertilizer input amount of the feed port can be controlled, thereby controlling the fertilizer storage inside the material box to prevent excessive fertilizer from entering and causing blockage of the material box.

[0022] 4. The screening device that can move the fertilizer, when the transmission rod rotates, cooperates with the driving belt to drive the rotating rod, and at the same time drives the cam to rotate and squeeze the screen plate. The cam repeatedly rotates to squeeze the screen plate, and cooperates with the fixed rod and the reset spring to make the screen plate shake up and down inside the movable groove, which can prevent the screen plate from being blocked, and at the same time can accelerate the fertilizer screening of the screen plate, thereby improving the working efficiency of the screening machine. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic diagram of the structure of the side cross-section of the utility model;

[0025] Figure 3 It is a schematic diagram of the overall structure of the slider of the utility model;

[0026] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure of A;

[0027] Figure 5 For this utility model Figure 2 A magnified schematic diagram of the B structure;

[0028] Figure 6 For this utility model Figure 2 Schematic diagram of the enlarged C structure.

[0029] In the figure: 1. screening machine; 2. collecting box; 21. feeding port; 3. hopper; 4. supporting plate; 5. motor; 6. roller; 7. movable slot; 8. unloading mechanism; 81. transmission rod; 82. driving bevel gear; 83. driven bevel gear; 84. sliding rod; 85. material box; 86. through hole; 87. turntable; 88. connecting rod; 9. toggle mechanism; 91. reciprocating screw rod; 92. slider; 93. toggle rod; 94. transmission belt; 10. limiting mechanism; 101. telescopic rod; 102. right angle plate; 103. baffle; 104. limiting spring; 11. screening mechanism; 111. fixing rod; 112. sieve plate; 113. reset spring; 114. supporting rod; 115. rotating rod; 116. cam; 117. driving belt. DETAILED DESCRIPTION

[0030] like Figure 1-6 As shown, the utility model provides a technical solution: a screening device that can be used to swipe fertilizers, including a screening machine 1, a collecting box 2 is slidably installed at the lower part of the interior of the screening machine 1, and the fertilizers that meet the screening requirements will fall into the interior of the collecting box 2 through the screen plate 112, and a feeding port 21 is provided on the top of the screening machine 1, and a hopper 3 is fixedly installed on the outer wall of the feeding port 21. The fertilizer is poured into the feeding port 21 through the hopper 3 and enters the interior of the material box 85. A supporting plate 4 is fixedly installed on the outer wall of the screening machine 1, and a motor 5 is fixedly installed on the upper surface of the supporting plate 4. A roller shaft 6 is fixedly installed on the output end of the motor 5. The motor 5 is started to drive the roller shaft 6 to rotate, and movable grooves 7 are provided on the side walls at both ends of the screening machine 1. The weight of the cam 116 is used to adjust the roller shaft 6. The sieve plate 112 is repeatedly rotated and squeezed, and the fixing rod 111 and the return spring 113 are cooperated to make the sieve plate 112 shake up and down inside the movable groove 7. A feeding mechanism 8 is arranged inside the screening machine 1. By setting the feeding mechanism 8, the fertilizer can be evenly sprinkled on the sieve plate 112, which is beneficial to the screening of the sieve plate 112. A toggle mechanism 9 is arranged inside the screening machine 1. By setting the toggle mechanism 9, the fertilizer accumulated on the material box 85 can be evenly spread, and the discharge of the material box 85 can be accelerated. A limiting mechanism 10 is arranged inside the screening machine 1. By setting the limiting mechanism 10, the opening and closing of the feed port 21 can be controlled. A screening mechanism 11 is arranged inside the screening machine 1, and the fertilizer can be screened by the screening mechanism 11.

[0031] The above-mentioned unloading mechanism 8 includes a transmission rod 81, which is rotatably mounted on the inner wall of the support plate 4, a driving bevel gear 82 is fixedly mounted on the outer wall of the roller shaft 6, and a driven bevel gear 83 is fixedly mounted on the outer wall of the transmission rod 81. The driven bevel gear 83 is meshed and connected with the driving bevel gear 82. A sliding rod 84 is fixedly mounted on the inner wall of the screening machine 1. The number of sliding rods 84 is two groups. A material box 85 is slidably mounted on the outer wall of the sliding rod 84. A plurality of through holes 86 are provided on the material box 85. A turntable 87 is fixedly mounted on the support plate 4 at both ends of the transmission rod 81. A connecting rod 88 is hinged on the outer wall of the turntable 87. The end of the connecting rod 88 away from the turntable 87 is hinged on the outer wall of the material box 85, and the end of the connecting rod 88 close to the turntable 87 is made around the turntable 87. Circular motion, the starting motor 5 drives the roller shaft 6 to rotate, and the roller shaft 6 drives the driving bevel gear 82 to rotate, so that the driven bevel gear 83 meshing with it rotates, so that the driven bevel gear 83 drives the transmission rod 81 to rotate, and the transmission rod 81 drives the turntables 87 at both ends to rotate. While the turntable 87 rotates, it drives one end of the connecting rod 88 to make a circular motion on the outer wall of the turntable 87, so that the other end of the connecting rod 88 pushes and pulls the material box 85 back and forth on the outer wall of the slide bar 84, so that the material box 85 achieves a reciprocating shaking effect, and the fertilizer accumulated on the material box 85 can be sprinkled onto the sieve plate 112 through the through hole 86 for screening. The shaking of the material box 85 can evenly sprinkle the fertilizer onto the sieve plate 112 through the through hole 86, which is beneficial to the screening of the sieve plate 112.

[0032] The above-mentioned toggle mechanism 9 includes a reciprocating screw 91, which is rotatably installed on the inner wall of the screening machine 1, and a slider 92 is threadedly connected to the outer wall of the reciprocating screw 91. A toggle rod 93 is fixedly installed on the outer wall of the slider 92. The end of the toggle rod 93 away from the slider 92 is attached to the inner wall of the material box 85. There are two groups of reciprocating screws 91. The reciprocating screw 91 passes through the screening machine 1 and is connected to the roller 6 through a transmission belt 94. When the roller 6 rotates, the transmission belt 94 will drive the reciprocating screw 91 to rotate, so that the slider 92 threadedly connected to the outer wall of the reciprocating screw 91 can slide back and forth inside the screening machine 1, and at the same time drive the toggle rod 93 to slide inside the material box 85, so as to toggle the fertilizer accumulated on the material box 85, so that the fertilizer can be evenly spread on the material box 85, thereby accelerating the discharge of the material box 85.

[0033] The above-mentioned limiting mechanism 10 includes a telescopic rod 101, which is fixedly mounted on the inner side wall of the screening machine 1, and a right-angle plate 102 is fixedly mounted on the end of the telescopic rod 101 away from the screening machine 1, and the right-angle plate 102 is fitted with the slider 92. A baffle 103 is fixedly mounted on the top of the right-angle plate 102, and the baffle 103 fits the feed port 21. The outer wall of the telescopic rod 101 is sleeved with a limiting spring 104, and one end of the limiting spring 104 is fixedly mounted on the inner wall of the screening machine 1, and the other end of the limiting spring 104 is fixedly mounted on the inner wall of the right-angle plate 102. When the slider 92 slides and fits the right-angle plate 102, it squeezes the right-angle plate 102, so that the right-angle plate 102 squeezes the telescopic rod 101 and the limiting spring 104 to shrink, and at the same time drives the baffle 103 to slide to the end away from the motor 5. The baffle 103 opens the feed port 21, and the fertilizer inside the hopper 3 can enter the inside of the material box 85 through the feed port 21. When the slider 92 slides away from the right-angle plate 102, the right-angle plate 102 and the telescopic rod 101 are reset under the tension of the limit spring 104, and the baffle 103 is driven to slide toward the feed port 21 to block the feed port 21. At this time, the fertilizer inside the hopper 3 cannot enter the inside of the material box 85 through the feed port 21. The slider 92 slides back and forth and repeatedly squeezes the right-angle plate 102. The limit spring 104 can make the baffle 103 control the opening and closing of the feed port 21, so as to control the fertilizer input amount of the feed port 21, thereby controlling the fertilizer storage inside the material box 85, and preventing too much fertilizer from entering, causing the material box 85 to be blocked.

[0034] The screening mechanism 11 comprises a fixed rod 111, which is fixedly mounted on the inner wall of the movable groove 7. There are four fixed rods 111, two of which are mounted in a group on the inner walls of the two movable grooves 7 with the feed port 21 as the center and in a mirror image. A sieve plate 112 is slidably mounted on the outer wall of the four fixed rods 111, and a return spring 113 is sleeved on the outer wall of the fixed rod 111. One end of the return spring 113 is fixedly mounted on the top of the inner wall of the movable groove 7, and the other end of the return spring 113 is fixedly mounted on the upper surface of the sieve plate 112. The sieve plate 112 The two ends are slidably mounted inside the movable groove 7, and the sieve plate 112 is movably mounted inside the two movable grooves 7 in the form of a 30° slope. After being screened by the sieve plate 112, the fertilizer that meets the screening requirements will fall into the collection box 2 through the sieve plate 112, and at the same time, the fertilizer that does not meet the requirements will be discharged to the movable groove 7 through the slope of the sieve plate 112, and discharged from the screening machine 1 through the movable groove 7. The end of the support plate 4 away from the motor 5 is fixedly mounted with a support rod 114, and the number of the support rod 114 is two groups, and the inner wall of the two groups of support rods 114 is rotatably mounted with a rotating rod 1 15. A cam 116 is fixedly installed on the outer wall of the rotating rod 115. The cam 116 fits the outer wall of the sieve plate 112. Both ends of the rotating rod 115 pass through the support rod 114 and are connected to the transmission rod 81 through the driving belt 117. When the transmission rod 81 rotates, the driving belt 117 drives the rotating rod 115 to rotate on the support rod 114. When the rotating rod 115 rotates, the cam 116 is driven to rotate. When the cam 116 rotates to fit the sieve plate 112, the sieve plate 112 is squeezed downward, so that the sieve plate 112 slides downward on the outer wall of the fixed rod 111. , and at the same time, the return spring 113 will be stretched. When the cam 116 rotates to disengage from the squeezing of the sieve plate 112, the return spring 113 contracts and drives the sieve plate 112 to slide upward on the outer wall of the fixed rod 111, so that the sieve plate 112 can achieve a shaking effect. The cam 116 repeatedly rotates to squeeze the sieve plate 112, and the fixed rod 111 and the return spring 113 are cooperated to make the sieve plate 112 shake up and down inside the movable groove 7, which can prevent the sieve plate 112 from being blocked and accelerate the fertilizer screening of the sieve plate 112, thereby improving the working efficiency of the screening machine 1.

[0035] Working principle: Fertilizer is poured into the feed port 21 through the hopper 3 and enters the interior of the material box 85. The motor 5 is started to drive the roller shaft 6 to rotate, and the roller shaft 6 drives the driving bevel gear 82 to rotate, so that the driven bevel gear 83 meshing with it rotates, so that the driven bevel gear 83 drives the transmission rod 81 to rotate, and the transmission rod 81 drives the turntables 87 at both ends to rotate. While the turntable 87 rotates, it drives one end of the connecting rod 88 to make a circular motion on the outer wall of the turntable 87, so that the other end of the connecting rod 88 pushes and pulls the material box 85 back and forth on the outer wall of the slide bar 84, so that the material box 85 achieves a reciprocating shaking effect, and the fertilizer accumulated on the material box 85 can be sprinkled onto the screen plate 112 through the through hole 86 for screening. The shaking of the material box 85 can evenly sprinkle the fertilizer onto the screen plate 112 through the through hole 86. In order to facilitate the screening of the sieve plate 112, the reciprocating screw 91 is driven to rotate through the transmission belt 94 while the roller shaft 6 rotates, so that the slider 92 threadedly connected to the outer wall of the reciprocating screw 91 slides back and forth inside the screening machine 1, and at the same time drives the lever 93 to slide inside the material box 85, and the fertilizer accumulated on the material box 85 is moved, so that the fertilizer can be evenly spread on the material box 85, and the discharge of the material box 85 is accelerated. When the slider 92 slides and fits the right-angle plate 102, it squeezes the right-angle plate 102, so that the right-angle plate 102 squeezes the telescopic rod 101 and the limit spring 104 to shrink, and at the same time drives the baffle 103 to slide to the end away from the motor 5. At this time, the baffle 103 opens the feed port 21, and the fertilizer inside the hopper 3 can enter the material box 85 through the feed port 21. When the slider 92 slides away from the right-angle plate 102, the right-angle plate 102 and the telescopic rod 101 are reset under the tension of the limit spring 104, and the baffle 103 is driven to slide toward the feed port 21 to block the feed port 21. At this time, the fertilizer inside the hopper 3 cannot enter the inside of the material box 85 through the feed port 21. The slider 92 slides back and forth and repeatedly squeezes the right-angle plate 102. The limit spring 104 allows the baffle 103 to control the opening and closing of the feed port 21, which can control the fertilizer input amount of the feed port 21, thereby controlling the fertilizer storage inside the material box 85, preventing too much fertilizer from entering, resulting in blockage of the material box 85, and at the same time facilitating the material box 85 to efficiently feed the material to the screen plate 112. After screening by the screen plate 112, the screening meets the requirements The fertilizer that does not meet the requirements will fall into the interior of the collecting box 2 through the sieve plate 112, and the fertilizer that does not meet the requirements will be discharged to the movable slot 7 through the inclined surface of the sieve plate 112, and discharged from the screening machine 1 through the movable slot 7. When the transmission rod 81 rotates, the driving belt 117 will drive the rotating rod 115 to rotate on the supporting rod 114. When the rotating rod 115 rotates, it will drive the cam 116 to rotate. When the cam 116 rotates to fit the sieve plate 112, the sieve plate 112 will be squeezed downward, so that the sieve plate 112 slides downward on the outer wall of the fixed rod 111, and the reset spring 113 will be stretched. When the cam 116 rotates to disengage from the squeezing of the sieve plate 112, the reset spring 113 contracts and drives the sieve plate 112 to slide upward on the outer wall of the fixed rod 111, so that the sieve plate 112 achieves a shaking effect.The cam 116 repeatedly rotates to squeeze the screen plate 112, and in conjunction with the fixing rod 111 and the return spring 113, the screen plate 112 can be shaken up and down inside the movable groove 7, which can prevent the screen plate 112 from being blocked, and at the same time accelerate the fertilizer screening of the screen plate 112, thereby improving the working efficiency of the screening machine 1.

[0036] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A screening device for moving fertilizers, comprising a screening machine (1), characterized in that: A collecting box (2) is slidably mounted at the lower part of the interior of the screening machine (1); a feeding port (21) is provided at the top of the screening machine (1); a hopper (3) is fixedly mounted on the outer wall of the feeding port (21); a supporting plate (4) is fixedly mounted on the outer wall of the screening machine (1); a motor (5) is fixedly mounted on the upper surface of the supporting plate (4); a roller shaft (6) is fixedly mounted on the output end of the motor (5); movable grooves (7) are provided on the side walls at both ends of the screening machine (1); a material discharge mechanism (8) is arranged inside the screening machine (1); a toggle mechanism (9) is arranged inside the screening machine (1); a limit mechanism (10) is arranged inside the screening machine (1); a screening mechanism (11) is arranged inside the screening machine (1); and the material discharge mechanism (8) comprises: A transmission rod (81), the transmission rod (81) is rotatably mounted on the inner wall of the support plate (4); A driving bevel gear (82), wherein the driving bevel gear (82) is fixedly mounted on the outer wall of the roller shaft (6); A driven bevel gear (83) is fixedly mounted on the outer wall of the transmission rod (81), and the driven bevel gear (83) is meshedly connected with the driving bevel gear (82).

2. A screening device capable of shifting fertilizers according to claim 1, characterized in that: The inner wall of the screening machine (1) is fixedly mounted with a slide bar (84), the number of the slide bars (84) being two groups, and the outer wall of the slide bar (84) is slidably mounted with a material box (85), and the material box (85) is provided with a plurality of groups of through holes (86).

3. A screening device capable of shifting fertilizers according to claim 1, characterized in that: Both ends of the transmission rod (81) pass through the support plate (4) and are fixedly mounted with a rotating disk (87); a connecting rod (88) is hingedly connected to the outer wall of the rotating disk (87); one end of the connecting rod (88) away from the rotating disk (87) is hingedly connected to the outer wall of the material box (85); and one end of the connecting rod (88) close to the rotating disk (87) moves in a circle around the rotating disk (87).

4. A screening device capable of shifting fertilizers according to claim 1, characterized in that: The shifting mechanism (9) comprises a reciprocating screw (91), the reciprocating screw (91) being rotatably mounted on the inner wall of the screening machine (1), the outer wall of the reciprocating screw (91) being threadedly connected with a slider (92), the outer wall of the slider (92) being fixedly mounted with a shifting rod (93), and the end of the shifting rod (93) away from the slider (92) being in contact with the inner wall of the material box (85).

5. A screening device capable of shifting fertilizers according to claim 4, characterized in that: The number of the reciprocating screw rods (91) is two groups, and the reciprocating screw rods (91) penetrate the screening machine (1) and are connected to the roller shaft (6) through a transmission belt (94).

6. The screening device capable of shifting fertilizers according to claim 1, characterized in that: The limiting mechanism (10) comprises a telescopic rod (101), the telescopic rod (101) being fixedly mounted on the inner side wall of the screening machine (1), a right-angle plate (102) being fixedly mounted on one end of the telescopic rod (101) away from the screening machine (1), the right-angle plate (102) being in contact with the sliding block (92), a baffle plate (103) being fixedly mounted on the top end of the right-angle plate (102), and the baffle plate (103) being in contact with the feed port (21).

7. A screening device capable of shifting fertilizers according to claim 6, characterized in that: The outer wall of the telescopic rod (101) is sleeved with a limit spring (104), one end of the limit spring (104) is fixedly mounted on the inner wall of the screening machine (1), and the other end of the limit spring (104) is fixedly mounted on the inner wall of the right-angle plate (102).

8. The screening device capable of shifting fertilizers according to claim 1, characterized in that: The screening mechanism (11) comprises a fixed rod (111), wherein the fixed rod (111) is fixedly mounted on the inner wall of the movable groove (7), the number of the fixed rods (111) is four, and the fixed rods (111) are a group of two and are mirror-mounted on the inner walls of the two movable grooves (7) with the feed port (21) as the center, a sieve plate (112) is slidably mounted on the outer walls of the four fixed rods (111), a return spring (113) is sleeved on the outer walls of the fixed rods (111), one end of the return spring (113) is fixedly mounted on the top of the inner wall of the movable groove (7), and the other end of the return spring (113) is fixedly mounted on the upper surface of the sieve plate (112), both ends of the sieve plate (112) are slidably mounted inside the movable groove (7), and the sieve plate (112) is movably mounted in the form of a 30° inclined surface inside the two movable grooves (7).

9. The screening device capable of shifting fertilizers according to claim 1, characterized in that: A support rod (114) is fixedly mounted on one end of the support plate (4) away from the motor (5), and the support rods (114) are provided in two groups. Rotating rods (115) are rotatably mounted on the inner walls of the two groups of support rods (114), and a cam (116) is fixedly mounted on the outer wall of the rotating rod (115), and the cam (116) is in contact with the outer wall of the sieve plate (112).

10. A screening device capable of shifting fertilizers according to claim 9, characterized in that: Both ends of the rotating rod (115) pass through the supporting rod (114) and are connected to the transmission rod (81) through a driving belt (117).

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