A process and device for preparing coated controlled-release potassium fertilizer

Abstract

The present invention relates to the field of mixing facilities, and in particular to a process and device for preparing coated controlled-release potash fertilizer, comprising a mixing tank, wherein a plurality of material boxes are embedded in an annular array in the lower part of the outer surface of the mixing tank, a material tray is coaxially embedded in the upper part of the outer surface of the mixing tank, a connecting piece is arranged between the material tray and the material box, a piston push plate is slidably installed inside the material box, a plurality of extrusion tubes are embedded in a linear array at the opposite ends of the plurality of material boxes, a blocking piece is arranged between the extrusion tube and the material box, a stirring shaft is coaxially arranged inside the mixing tank, a reciprocating piece is arranged between the stirring shaft and the piston push plate, and a discharge valve is installed in the middle part of the lower end of the mixing tank. The present invention improves the mixing efficiency and ensures the normal progress of the feeding operation.

Description

Technical Field

[0001] The invention relates to the field of mixing facilities, and in particular to a process and a device for preparing coated controlled-release potash fertilizer. Background Art

[0002] Coated controlled-release potassium fertilizer is a special fertilizer, which is characterized by coating the surface of potassium fertilizer particles with a film to control the release rate of potassium ions. In the preparation process of coated controlled-release potassium fertilizer, the polyurethane reaction raw materials need to be mixed in a solvent and then sprayed onto the surface of urea particles. After the solvent evaporates, the solute solidifies into a film on the surface of the urea particles to obtain coated controlled-release potassium fertilizer.

[0003] However, when mixing the polyurethane reaction raw materials and the solvent, the existing preparation facilities mostly add all the polyurethane reaction raw materials into the solvent and then stir and mix them. This operation method requires a long stirring time during mixing to ensure that the two are mixed evenly due to the centralized addition of the materials, resulting in low mixing efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and propose a coating controlled-release potash fertilizer preparation process and preparation device.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a coated controlled-release potassium fertilizer preparation device, comprising a mixing tank, a plurality of material boxes are inlaid in a circular array on the lower portion of the outer surface of the mixing tank, a material tray is coaxially inlaid on the upper portion of the outer surface of the mixing tank, a connecting piece is provided between the material tray and the material box, a piston push plate is slidably installed inside the material box, a plurality of extrusion tubes are inlaid in a linear array at the opposite ends of the plurality of material boxes, a sealing piece is provided between the extrusion tube and the material box, a stirring shaft is coaxially arranged inside the mixing tank, a reciprocating piece is provided between the stirring shaft and the piston push plate, and a discharge valve is installed through the middle portion of the lower end of the mixing tank.

[0006] Preferably, the connecting piece includes a plurality of step tubes in a circular array which penetrate through the lower end of the material tray and are embedded therein. The lower end of the step tubes is fixedly connected to the upper edge of the material box. A connecting rod is coaxially arranged inside the step tube. A blocking cap is coaxially embedded at the lower end of the connecting rod, and the blocking cap is tightly attached to the step surface of the step tube.

[0007] Preferably, a plurality of bearing sleeves are fixedly installed in a circular array on the inner wall of the material tray, the connecting rod slides through the interior of the bearing sleeve, a convex cap is slidably installed inside the bearing sleeve, the lower end of the convex cap is fixed to the upper end of the connecting rod, a No. 1 return spring is wound around the outer side of the connecting rod, one end of the No. 1 return spring is fixed to the inner lower end of the bearing sleeve, and the other end of the No. 1 return spring is fixed to the lower end of the convex cap.

[0008] Preferably, the blocking member includes a plurality of groups of supporting shells fixedly mounted on opposite ends of a plurality of material boxes, the number of supporting shells in each group being two, a top ring being slidably mounted inside the supporting shell, a connecting column being coaxially extended at one end of the top ring, the connecting column slidingly extending through the end of the supporting shell, a connecting frame being inlaid at the end of the connecting column, a cap rack being fixedly mounted at both ends of the connecting frame, a plurality of pipe caps being fixedly mounted in a linear array on the cap rack, the end edges of the pipe caps being arranged in a bevel, and the end of the extruded tube being pressed tightly against the bevel of the pipe cap.

[0009] Preferably, a No. 2 return spring is fixedly mounted on the inner end surface of the bearing shell, an end of the No. 2 return spring is fixed to the other end of the top ring, and a positioning column is coaxially embedded on the inner end surface of the bearing shell, and the positioning column runs through the interior of the No. 2 return spring.

[0010] Preferably, the reciprocating member includes a tank shell coaxially arranged on the outside of the material tray, a tank seat is fixedly installed at the lower end of the tank shell, the material box is fixed to the inner wall of the tank shell, a ring body is coaxially arranged on the outside of the tank shell, a plurality of push racks are rotatably installed in a circular array at the lower end of the ring body, and a squeezing rack is rotatably installed at the end of the push rack, the squeezing rack slides through the interior of the tank shell and the interior of the material box in turn, and the end of the squeezing rack is fixed to the piston push plate.

[0011] Preferably, two guide sleeves are symmetrically inlaid inside the ring body, a guide rod is slidably installed inside the guide sleeve, the end of the guide rod is fixed to the tank seat, a carrier is fixedly installed on the upper end of the tank shell, the stirring shaft passes through and is rotatably installed in the middle of the carrier, a small gear is coaxially inlaid on the upper part of the outer surface of the stirring shaft, a shaft body is rotatably installed at the upper end edge of the carrier, a large gear is coaxially inlaid on the outer surface of the shaft body, and the small gear is meshed with the large gear.

[0012] Preferably, a rotating rod is provided above the stirring shaft, and the rotating rod is rotatably connected to the carrier. The outer surface of the rotating rod and the upper end of the shaft body are coaxially inlaid with bevel gears, and the two bevel gears are meshed with each other. A servo motor is fixedly installed on the upper end of the carrier near the rear of the stirring shaft. A belt is connected between the output end of the servo motor and the end of the stirring shaft through a pulley. Lugs extend from both ends of the rotating rod, and a push ring frame is rotatably installed on the end of the lug, and the end of the push ring frame is rotatably connected to the ring body.

[0013] A process for preparing coated controlled-release potash fertilizer is also provided, comprising the following steps:

[0014] S1: Add the solvent into the mixing tank, and then add the polyurethane reaction raw materials into the material tray;

[0015] S2: Then the servo motor starts working, driving the stirring shaft and the piston push plate to move and mix the two;

[0016] S3: The mixed solution is then sprayed onto the surface of the urea particles using a spraying device. After the solvent evaporates, the solute solidifies into a film on the surface of the urea particles to obtain a coated controlled-release potassium fertilizer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the multiple material boxes evenly distributed on the outside of the mixing tank, the small gear and the large gear can drive the shaft to rotate while the stirring shaft is stirring, and then the lug on the rotating rod is driven to rotate through the bevel gear, so as to drive the push ring frame to move to push the ring body, so that the ring body drives multiple push frames to move, so as to push the piston push plate on the extrusion frame, so that the piston push plate can slide in the material box to squeeze the polyurethane reaction raw materials in the material box. At this time, the pipe cap is pushed sideways by the raw materials, and the No. 2 return spring shrinks and deforms, so that the polyurethane reaction raw materials are sprayed out in a ring shape from the gap between the extrusion pipe and the pipe cap, so that the polyurethane reaction raw materials are sprayed into the solvent in a ring shape from all sides of the mixing tank, avoiding the phenomenon of increased stirring time due to too concentrated addition, thereby improving the mixing efficiency.

[0019] 2. When the piston push plate slides in the material box to push out the polyurethane reaction raw materials in the material box and then resets it, the tube cap will be pressed tightly against the extrusion tube by the No. 2 reset spring to seal the extrusion tube. At this time, the piston push plate will generate negative pressure in the material box during the gradual reset process, so that the blocking cap will move downward under the action of the negative pressure, allowing the step tube to open, so that the polyurethane reaction raw materials in the material tray can be added into the material box through the step tube, so that there is a sufficient amount of polyurethane reaction raw materials in the material box for feeding, thereby ensuring the normal feeding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a device for preparing coated controlled-release potassium fertilizer according to the present invention;

[0021] Figure 2 This is an internal view of a device for preparing coated controlled-release potash fertilizer according to the present invention;

[0022] Figure 3 A coated controlled-release potash fertilizer preparation device according to the present invention Figure 2 A magnified view of middle;

[0023] Figure 4 This is an internal view of a material box of a device for preparing coated controlled-release potash fertilizer according to the present invention;

[0024] Figure 5 It is a cross-sectional view of the extrusion pipe of a device for preparing coated controlled-release potash fertilizer of the present invention;

[0025] Figure 6 This is an internal view of a supporting shell of a coated controlled-release potassium fertilizer preparation device of the present invention;

[0026] Figure 7 The present invention is a cross-sectional view of a support sleeve of a device for preparing coated controlled-release potassium fertilizer.

[0027] In the figure: 1. tank seat; 2. tank shell; 3. guide rod; 4. guide sleeve; 5. push rack; 6. ring body; 7. stirring shaft; 8. carrier; 9. lug; 10. push ring rack; 11. servo motor; 12. belt; 13. small gear; 14. bevel gear; 15. rotating rod; 16. shaft body; 17. large gear; 18. mixing tank; 19. material tray; 20. discharge valve; 21. material box; 22. extrusion rack; 23. stepped pipe; 24. bearing sleeve; 25. extrusion tube; 26. pipe cap; 27. bearing shell; 28. connecting rack; 29. ​​convex cap; 30. No. 1 reset spring; 31. connecting rod; 32. blocking cap; 33. piston push plate; 34. cap rack; 35. positioning column; 36. No. 2 reset spring; 37. top ring; 38. connecting column. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0029] like Figure 1-Figure 7 The device for preparing coated controlled-release potash fertilizer shown in the figure comprises a mixing tank 18, wherein a plurality of material boxes 21 are embedded in a circular array in the lower part of the outer surface of the mixing tank 18, and the material boxes 21 are used to add polyurethane reaction raw materials into a solvent from all sides of the mixing tank 18, and a material tray 19 is coaxially embedded in the upper part of the outer surface of the mixing tank 18, and a connecting piece is provided between the material tray 19 and the material box 21, and the material tray 19 is used to disperse the polyurethane reaction raw materials into the plurality of material boxes 21, and a piston push plate 33 is slidably installed inside the material box 21, and the piston push plate 33 is used to push the polyurethane reaction raw materials into the solvent. In order to push the raw materials, the opposite ends of the multiple material boxes 21 are penetrated and inlaid with multiple extrusion tubes 25 in a linear array. The extrusion tubes 25 allow the polyurethane reaction raw materials in the material boxes 21 to be discharged at multiple points. A sealing member is provided between the extrusion tubes 25 and the material boxes 21. A stirring shaft 7 is coaxially provided inside the mixing tank 18. The stirring shaft 7 plays a stirring role. A reciprocating member is provided between the stirring shaft 7 and the piston push plate 33. A discharge valve 20 is installed through the middle of the lower end of the mixing tank 18. The discharge valve 20 plays a role in discharging the mixed raw materials.

[0030] The connecting piece includes a plurality of step pipes 23 in a circular array which penetrate through the lower end of the material tray 19 and are embedded therein. The lower end of the step pipe 23 is fixedly connected to the upper edge of the material box 21. The step pipe 23 serves to deliver the polyurethane reaction raw materials in the material tray 19 into the material box 21. A connecting rod 31 is coaxially arranged inside the step pipe 23. A blocking cap 32 is coaxially embedded at the lower end of the connecting rod 31. The connecting rod 31 serves to support the blocking cap 32. The blocking cap 32 is tightly attached to the step surface of the step pipe 23. The blocking cap 32 serves to seal the step pipe 23.

[0031] A plurality of bearing sleeves 24 are fixedly installed in a circular array on the inner wall of the material tray 19, and a connecting rod 31 slides through the interior of the bearing sleeve 24. The bearing sleeve 24 serves to carry a No. 1 return spring 30. A convex cap 29 is slidably installed inside the bearing sleeve 24. The lower end of the convex cap 29 is fixed to the upper end of the connecting rod 31, and a No. 1 return spring 30 is wound around the outer side of the connecting rod 31. The No. 1 return spring 30 can push the convex cap 29 so that the moving blocking cap 32 can move to the step surface of the step pipe 23 to block the step pipe 23. One end of the No. 1 return spring 30 is fixed to the inner lower end of the bearing sleeve 24, and the other end of the No. 1 return spring 30 is fixed to the lower end of the convex cap 29.

[0032] The sealing member includes a plurality of groups of supporting shells 27 fixedly mounted on opposite ends of a plurality of material boxes 21, each group of supporting shells 27 having two members. A top ring 37 is slidably mounted inside the supporting shell 27, and the supporting shell 27 serves to support the top ring 37. A connecting column 38 coaxially extends from one end of the top ring 37, and the connecting column 38 slides through the end of the supporting shell 27, and the connecting column 38 serves to connect. A connecting frame 28 is inlaid at the end of the connecting column 38, and a cap frame 34 is fixedly mounted at both ends of the connecting frame 28, and the connecting frame 28 serves to connect the cap frame 34. A plurality of pipe caps 26 are fixedly mounted in a linear array on the cap frame 34, and the pipe cap 26 serves to seal the extrusion tube 25. The end edge of the pipe cap 26 is inclined, so that the polyurethane reaction raw materials can be sprayed out in a ring shape along the inclined surface of the pipe cap 26, and the end of the extrusion tube 25 is pressed tightly against the inclined surface of the pipe cap 26.

[0033] A No. 2 return spring 36 is fixedly installed on the inner end surface of the bearing shell 27, and the end of the No. 2 return spring 36 is fixed to the other end of the top ring 37. The No. 2 return spring 36 can push the top ring 37 so that the pipe cap 26 can be pressed against the extrusion tube 25. A positioning column 35 is coaxially inlaid on the inner end surface of the bearing shell 27. The positioning column 35 runs through the interior of the No. 2 return spring 36. The positioning column 35 can limit the opening range of the pipe cap 26 to ensure that after opening, the distance between the pipe cap 26 and the extrusion tube 25 is in a small state, so that the polyurethane reaction raw materials can be sprayed out from the gap between the pipe cap 26 and the extrusion tube 25, so as to ensure that the polyurethane reaction raw materials can be in a ring shape when sprayed out, so as to improve the dispersion when the solvent is added.

[0034] The reciprocating member includes a tank shell 2 coaxially arranged on the outer side of the material tray 19, a tank seat 1 is fixedly installed at the lower end of the tank shell 2, the tank shell 2 serves as a cover, a material box 21 is fixed to the inner wall of the tank shell 2, a ring body 6 is coaxially arranged on the outer side of the tank shell 2, a plurality of push racks 5 are rotatably installed in a circular array at the lower end of the ring body 6, the ring body 6 serves to drive the push rack 5 to move, a squeezing rack 22 is rotatably installed at the end of the push rack 5, the push rack 5 serves to push the squeezing rack 22, the squeezing rack 22 slides through the interior of the tank shell 2 and the interior of the material box 21 in sequence, the end of the squeezing rack 22 is fixed to the piston push plate 33, and the squeezing rack 22 can drive the piston push plate 33 to slide reciprocatingly.

[0035] Two guide sleeves 4 are symmetrically inlaid inside the ring body 6, and a guide rod 3 is slidably installed inside the guide sleeve 4. The end of the guide rod 3 is fixed to the tank seat 1, and the guide sleeve 4 and the guide rod 3 play a role in guiding the ring body 6. A carrier 8 is fixedly installed on the upper end of the tank shell 2, and the stirring shaft 7 is rotatably installed on the middle part of the carrier 8. The carrier 8 plays a role in supporting the stirring shaft 7 and the shaft body 16. A small gear 13 is coaxially inlaid on the upper part of the outer surface of the stirring shaft 7, and a shaft body 16 is rotatably installed at the upper end edge of the carrier 8. A large gear 17 is coaxially inlaid on the outer surface of the shaft body 16, and the small gear 13 is meshed with the large gear 17, and the small gear 13 and the large gear 17 play a role in speed reduction transmission.

[0036] A rotating rod 15 is arranged above the stirring shaft 7, and the rotating rod 15 is rotatably connected with the carrier 8. The rotating rod 15 plays the role of driving the lug 9 to rotate. The outer surface of the rotating rod 15 and the upper end of the shaft body 16 are coaxially inlaid with a bevel gear 14, and the two bevel gears 14 are meshed with each other. The bevel gear 14 plays a transmission role. A servo motor 11 is fixedly installed at the upper end of the carrier 8 near the rear of the stirring shaft 7. A belt 12 is connected between the output end of the servo motor 11 and the end of the stirring shaft 7 through a pulley. The servo motor 11 can drive the stirring shaft 7 to rotate through the belt 12. Lugs 9 are extended from both ends of the rotating rod 15, and a push ring frame 10 is rotatably installed at the end of the lug 9. The lug 9 can drive the push ring frame 10 to move to push the ring body 6, and the end of the push ring frame 10 is rotatably connected with the ring body 6.

[0037] A process for preparing coated controlled-release potash fertilizer is also provided, comprising the following steps:

[0038] S1: Add the solvent into the mixing tank 18, and then add the polyurethane reaction raw materials into the material tray 19;

[0039] S2: Then the servo motor 11 starts working, driving the stirring shaft 7 and the piston push plate 33 to move, and the two are mixed;

[0040] S3: The mixed solution is then sprayed onto the surface of the urea particles using a spraying device. After the solvent evaporates, the solute solidifies into a film on the surface of the urea particles to obtain a coated controlled-release potassium fertilizer.

[0041] During preparation, the solvent is added into the mixing tank 18, and then the polyurethane reaction raw materials are added into the material tray 19, and then the servo motor 11 works and drives the stirring shaft 7 to rotate through the belt 12. In this process, the stirring shaft 7 drives the shaft body 16 to rotate through the small gear 13 and the large gear 17, and then drives the lug 9 on the rotating rod 15 to rotate through the bevel gear 14, so as to drive the push ring frame 10 to move and push the ring body 6, so that the ring body 6 drives multiple push frames 5 to move, so as to push the piston push plate 33 on the extrusion frame 22, so that the piston push plate 33 can slide in the material box 21, and when the piston push plate 33 moves in the opposite direction to the extrusion tube 25, the pipe cap 26 will be pressed tightly against the extrusion tube 25 by the pressure of the No. 2 return spring 36 to block the extrusion tube 25, and at this time, the piston push plate 33 will allow the material box 21 to move gradually. Negative pressure is generated, so that the blocking cap 32 moves downward under the action of the negative pressure, allowing the step tube 23 to open, so that the polyurethane reaction raw materials in the material tray 19 can pass through the step tube 23 and be replenished into the material box 21. When the piston push plate 33 moves toward the direction of the extrusion tube 25, the No. 1 return spring 30 pulls the blocking cap 32 to reset the blocking cap 32 to press against the step surface of the step tube 23 to block the step tube 23, and the polyurethane reaction raw materials are squeezed by the moving piston push plate 33. At this time, the pipe cap 26 is pushed sideways by the raw materials, and the No. 2 return spring 36 shrinks and deforms, so that the polyurethane reaction raw materials are sprayed out in a ring shape from the gap between the extrusion tube 25 and the pipe cap 26, so that the polyurethane reaction raw materials are sprayed into the solvent in a ring shape from all around the mixing tank 18, and are stirred by the rotating stirring shaft 7 to mix the two.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for preparing coated controlled-release potash fertilizer, comprising a mixing tank (18), characterized in that: A plurality of material boxes (21) are embedded in an annular array in the lower part of the outer surface of the mixing tank (18); a material tray (19) is coaxially embedded in the upper part of the outer surface of the mixing tank (18); a connecting piece is provided between the material tray (19) and the material box (21); a piston push plate (33) is slidably mounted inside the material box (21); a plurality of extrusion tubes (25) are embedded in a linear array at the opposite ends of the plurality of material boxes (21); a blocking piece is provided between the extrusion tubes (25) and the material box (21); a stirring shaft (7) is coaxially arranged inside the mixing tank (18); a reciprocating piece is provided between the stirring shaft (7) and the piston push plate (33); and a discharge valve (20) is installed in the middle part of the lower end of the mixing tank (18); The connecting member comprises a plurality of stepped tubes (23) in an annular array and penetrating through the lower end of the material tray (19); the lower end of the stepped tube (23) is fixedly connected to the upper edge of the material box (21); a connecting rod (31) is coaxially arranged inside the stepped tube (23); a blocking cap (32) is coaxially embedded at the lower end of the connecting rod (31); and the blocking cap (32) is tightly attached to the stepped surface of the stepped tube (23); The blocking member comprises a plurality of groups of bearing shells (27) fixedly mounted on opposite ends of a plurality of material boxes (21), each group of the bearing shells (27) having two members, a top ring (37) being slidably mounted inside the bearing shell (27), a connecting column (38) coaxially extending from one end of the top ring (37), the connecting column (38) slidingly passing through the end of the bearing shell (27), a connecting frame (28) being inlaid at the end of the connecting column (38), a cap frame (34) being fixedly mounted at both ends of the connecting frame (28), a plurality of pipe caps (26) being fixedly mounted in a linear array on the cap frame (34), the end edges of the pipe caps (26) being arranged in an inclined surface, and the end of the extrusion tube (25) being pressed tightly against the inclined surface of the pipe cap (26); The reciprocating member comprises a tank shell (2) coaxially arranged on the outside of a material tray (19); a tank seat (1) is fixedly mounted on the lower end of the tank shell (2); the material box (21) is fixed to the inner wall of the tank shell (2); a ring body (6) is coaxially arranged on the outside of the tank shell (2); a plurality of push racks (5) are rotatably mounted in an annular array at the lower end of the ring body (6); an extrusion rack (22) is rotatably mounted on the end of the push rack (5); the extrusion rack (22) slides through the inside of the tank shell (2) and the inside of the material box (21) in sequence; the end of the extrusion rack (22) is fixed to a piston push plate (33).

2. A coated controlled-release potash fertilizer preparation device according to claim 1, characterized in that: A plurality of bearing sleeves (24) are fixedly mounted in an annular array on the inner wall of the material tray (19); the connecting rod (31) slides through the interior of the bearing sleeve (24); a convex cap (29) is slidably mounted inside the bearing sleeve (24); the lower end of the convex cap (29) is fixed to the upper end of the connecting rod (31); a No. 1 return spring (30) is wound around the outer side of the connecting rod (31); one end of the No. 1 return spring (30) is fixed to the inner lower end of the bearing sleeve (24); and the other end of the No. 1 return spring (30) is fixed to the lower end of the convex cap (29).

3. A coated controlled-release potash fertilizer preparation device according to claim 2, characterized in that: A No. 2 return spring (36) is fixedly mounted on the inner end surface of the bearing shell (27), an end of the No. 2 return spring (36) is fixed to the other end of the top ring (37), and a positioning column (35) is coaxially inlaid on the inner end surface of the bearing shell (27), and the positioning column (35) passes through the interior of the No. 2 return spring (36).

4. A coated controlled-release potash fertilizer preparation device according to claim 3, characterized in that: Two guide sleeves (4) are symmetrically inlaid inside the ring body (6), a guide rod (3) is slidably installed inside the guide sleeve (4), the end of the guide rod (3) is fixed to the tank seat (1), a carrier (8) is fixedly installed on the upper end of the tank shell (2), the stirring shaft (7) is rotatably installed on the middle part of the carrier (8), a small gear (13) is coaxially inlaid on the upper part of the outer surface of the stirring shaft (7), a shaft body (16) is rotatably installed at the upper end edge of the carrier (8), and a large gear (17) is coaxially inlaid on the outer surface of the shaft body (16), and the small gear (13) is meshed with the large gear (17).

5. A coated controlled-release potash fertilizer preparation device according to claim 4, characterized in that: A rotating rod (15) is arranged above the stirring shaft (7), and the rotating rod (15) is rotatably connected to the carrier (8). The outer surface of the rotating rod (15) and the upper end of the shaft body (16) are coaxially inlaid with a bevel gear (14), and the two bevel gears (14) are meshed with each other. A servo motor (11) is fixedly installed at the upper end of the carrier (8) near the rear of the stirring shaft (7), and a belt (12) is connected between the output end of the servo motor (11) and the end of the stirring shaft (7) via a pulley. Lugs (9) extend from both ends of the rotating rod (15), and a push ring frame (10) is rotatably installed at the end of the lug (9), and the end of the push ring frame (10) is rotatably connected to the ring body (6).

Images