Crop seed dressing machine

Abstract

The invention discloses a crop seed dressing machine, and belongs to the technical field of agricultural equipment.The crop seed dressing machine comprises a stirring barrel, a stirring mechanism and a liquid injection mechanism, the stirring barrel is provided with a feeding hopper and a discharging hopper, the discharging hopper is provided with a material blocking plate, and the stirring mechanism and the liquid injection mechanism are installed in a cavity of the stirring barrel; the stirring mechanism comprises a main spiral blade, auxiliary spiral blades, a first connecting frame and a motor, the lower end of the stirring barrel is connected with the motor, a motor shaft of the motor is connected with the lower end of a center shaft of the main spiral blade, and the upper end of the center shaft of the main spiral blade is connected with the auxiliary spiral blades through the first connecting frame; a connecting through hole is formed in the first connecting frame, the upper end of a center shaft of the auxiliary spiral blade is rotationally connected with the connecting through hole of the first connecting frame through a bearing, and the upper end of the auxiliary spiral blade is connected with the driving assembly. Compared with the prior art, the device has the characteristic of improving the seed and medicine mixing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural equipment, in particular to a crop seed mixing machine. Background Art

[0002] Seed dressing, as an agricultural technical measure, specifically refers to the process of mixing selected seeds with appropriate amounts of pesticides or micro-fertilizers and other auxiliary materials through specific process means. In this process, the surface of the seeds can be evenly covered with a thin layer of pesticides or micro-fertilizers to form a protective layer. The purpose of seed dressing is to kill insects, sterilize, and promote the growth and development of strong seedlings.

[0003] The main purpose of using pesticides for seed dressing is to eliminate all kinds of pests and pathogens attached to the surface of seeds or even carried inside, so as to effectively protect seedlings from pests and diseases hidden in the soil during germination and early growth stages. More advanced is that some pesticides can be absorbed by the seed bacteria and transported to the above-ground part, providing a continuous protective barrier for crops, so that they can be protected from pests and diseases throughout the growth cycle, ensuring that crops grow healthy and strong.

[0004] On the other hand, using micro-fertilizers for seed dressing is aimed at the problem of insufficient trace element content in specific soils. It meets the needs of crops for trace elements such as zinc, boron, and manganese through artificial supplementation. This approach can effectively overcome the limitations of natural soil supply, promote crop root development, enhance photosynthesis efficiency, and then achieve the cultivation of strong seedlings, laying a solid foundation for subsequent high and stable yields.

[0005] In actual operation, the seed mixer is an important tool for realizing this technology, and its performance and design are directly related to the effect of seed mixing. Most traditional seed mixers adopt a simple stirring and mixing structure. During operation, the operator needs to put the seeds and the pre-prepared liquid medicine into the mixing container. Subsequently, mechanical stirring is performed by the agitator in the container in order to achieve the purpose of fully mixing the seeds and the liquid medicine. However, since the liquid medicine is usually sprinkled directly from above the seeds, and the seeds are of different shapes and sizes, it is difficult to quickly achieve the ideal mixing uniformity, and it often takes a long time to stir. In this process, not only does the energy consumption increase, but the long-term mechanical friction may also cause damage to the seed epidermis, the so-called "peeling" phenomenon, which in turn affects the germination rate of the seeds and subsequent growth performance. Summary of the invention

[0006] The purpose of the present invention is to provide a crop seed mixing machine to address the deficiencies of the above prior art, so as to improve the mixing efficiency of seeds and medicines.

[0007] A crop seed mixer provided by the present invention comprises a mixing barrel, a mixing mechanism and a liquid injection mechanism, wherein the mixing barrel is respectively provided with a feed hopper and a discharge hopper, and the discharge hopper is provided with a baffle plate; the characteristic is that the mixing mechanism and the liquid injection mechanism are installed in the cavity of the mixing barrel, the mixing mechanism comprises a main spiral blade, a secondary spiral blade, a first connecting frame and a motor, the lower end of the mixing barrel is connected to the motor, the motor shaft of the motor is connected to the lower end of the central axis of the main spiral blade, the upper end of the central axis of the main spiral blade is connected to a plurality of secondary spiral blades through the first connecting frame, a connecting through hole is provided on the first connecting frame, the upper end of the central axis of the secondary spiral blade is rotatably connected to the connecting through hole of the first connecting frame through a bearing, and the upper end of the secondary spiral blade is connected to the driving assembly.

[0008] Furthermore, the plurality of auxiliary spiral blades are uniformly arranged around the main spiral blade in a circular shape.

[0009] Furthermore, the motor shaft of the motor is connected to the lower end of the central axis of the main spiral blade through a reciprocating mechanism; the reciprocating mechanism includes a reciprocating screw, a screw nut, a first guide rod and a second guide rod, a through hole is provided on the lower end wall of the mixing barrel, the screw nut is installed in the through hole of the lower end wall of the mixing barrel, the reciprocating screw cooperates with the screw nut, one end of the first guide rod and the second guide rod is a spline shaft, and the other end is an optical axis, the upper end of the reciprocating screw is coaxially fixedly connected with the central axis of the main spiral blade, the lower end of the reciprocating screw is provided with a guide blind hole, the inner wall of the guide blind hole of the reciprocating screw is provided with a keyway corresponding to the spline shaft of the first guide rod, the spline shaft of the first guide rod cooperates with the guide blind hole of the reciprocating screw, and the optical axis of the first guide rod is connected to the motor shaft of the motor through a coupling; the upper end of the central axis of the secondary spiral blade is provided with a guide blind hole, the inner wall of the guide blind hole is provided with a keyway corresponding to the spline shaft of the second guide rod, and the spline shaft of the second guide rod cooperates with the guide blind hole of the secondary spiral blade.

[0010] Furthermore, the injection mechanism includes a main liquid pipe, a first liquid dispensing pipe, a second liquid dispensing pipe and an anti-blocking assembly. A through hole is provided at the center position of the upper end wall of the stirring barrel. The lower end of the main liquid pipe passes through the through hole of the stirring barrel and is connected to the first liquid dispensing pipe through a rotating joint. The first liquid dispensing pipe is connected to the second liquid dispensing pipe through a connecting pipe and a bent joint. The main liquid pipe is connected to a container containing liquid medicine through a pipeline and a high-pressure pump. A lumen is provided inside the central axis of the main spiral blade and the auxiliary spiral blade. The lower end of the first liquid dispensing pipe is inserted into the lumen of the main spiral blade, and the lower end of the second liquid dispensing pipe is inserted into the lumen of the auxiliary spiral blade. An axial hole is provided at the axial position of the second guide rod. The second liquid dispensing pipe passes through the axial hole of the second guide rod, and the two are rotatably connected. Liquid outlet holes are respectively provided on the outer walls of the central axis of the main spiral blade and the auxiliary spiral blade. The liquid outlet holes are connected to the lumen of the central axis, and an anti-blocking assembly is installed at the liquid outlet hole of the central axis.

[0011] Furthermore, the lower ends of the first liquid dispensing tube and the second liquid dispensing tube are respectively covered with sealing rings, and the sealing rings are respectively fitted with the inner walls of the corresponding central axis cavities.

[0012] Furthermore, the driving assembly includes a gear and a gear ring, the optical axis of the second guide rod is fixedly connected to the gear hole of the gear, the gear ring is installed on the inner wall of the mixing barrel, and the gear ring is meshed with the gear.

[0013] Furthermore, the anti-blocking assembly includes an anti-blocking tube, a valve core rod and a piston. The outer end of the anti-blocking tube is installed at the liquid outlet. The anti-blocking tube is provided with a stepped hole. The outer end hole of the stepped hole is a small diameter hole, and the inner end hole is a large diameter hole. The small diameter hole is connected to the outside world. A piston is installed in the large diameter hole. The piston fits with the inner wall of the large diameter hole, and the two slide together. A valve core rod is fixedly installed on the outer end wall of the piston, and the valve core rod is inserted into the small diameter hole. The outer wall of the valve core rod fits with the inner wall of the small diameter hole to block the small diameter hole, and the valve core rod slides with the small diameter hole; the piston is connected to the inner end wall of the large diameter hole by a spring, and a connecting hole is provided on the inner wall of the large diameter hole between the piston and the outer end wall of the large diameter hole. The connecting hole connects the tubular cavity of the central axis with the large diameter hole of the anti-blocking tube.

[0014] Furthermore, a guide hole is provided at the inner end of the anti-blocking tube, a guide rod is fixedly mounted at the inner end of the piston, the guide rod is inserted into the guide hole, and is slidably and sealingly connected to the guide hole.

[0015] Compared with the prior art, the present invention has the following outstanding beneficial effects: 1. The main spiral blade and the auxiliary spiral blade of the present invention are provided with liquid outlet holes. During the rotation and stirring process, the main spiral blade and the auxiliary spiral blade can simultaneously spray liquid medicine from the liquid outlet holes. Since the liquid outlet holes are located inside the mixing barrel where the seeds are piled, the liquid medicine can be quickly mixed with the seeds, which reduces the stirring time, improves the mixing efficiency, and prevents the seeds from being damaged due to long-term mechanical friction. 2. The present invention has both a main spiral blade and a secondary spiral blade, and the main spiral blade and the secondary spiral blade rotate in opposite directions. During the rotation of the main spiral blade, the seeds at the bottom of the mixing barrel are transported to the upper part, and during the rotation of the secondary spiral blade, the seeds at the upper part of the mixing barrel are transported to the bottom, so that the seeds circulate continuously in the mixing barrel, thereby improving the mixing efficiency with the liquid medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 is a top view of the present invention; Figure 4 yes Figure 3 Cross-sectional view of the AA section; Figure 5 yes Figure 4 A partial enlarged view of part B; 1. Mixing barrel, 11. Baffle plate, 12. Discharge hopper, 13. Feed hopper, 14. Connecting sleeve, 15. Observation window, 16. End cover, 2. Mixing mechanism, 21. Secondary spiral blade, 22. Main spiral blade, 23. First connecting frame, 24. Motor, 25. Drive assembly, 251. Gear ring, 252. Gear, 3. Reciprocating mechanism, 31. First guide rod, 32. Reciprocating screw, 33. Screw nut, 34. Second guide rod, 35. Second connecting frame, 4. Liquid injection mechanism, 41. Main liquid pipe, 42. Rotary joint, 43. Connecting pipe, 44. First liquid dispensing pipe, 45. Second liquid dispensing pipe, 46. Anti-blocking assembly, 461. Anti-blocking pipe, 462. Valve core rod, 463. Piston, 464. Spring, 465. Third guide rod. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0018] like Figure 1 As shown, the present invention comprises a stirring barrel 1 , a stirring mechanism 2 and a liquid injection mechanism 4 .

[0019] A feed hopper 13 is installed on the barrel wall of the upper end portion of the mixing barrel 1, and a discharge hopper 12 is installed on the barrel wall of the lower end portion. The feed hopper 13 and the discharge hopper 12 are respectively connected to the internal cavity of the mixing barrel 1. A slot is provided on the upper end wall of the discharge hopper 12. The lower end of the baffle plate 11 is inserted into the slot of the discharge hopper 12 to block the discharge port at the connection between the discharge hopper 12 and the mixing barrel 1.

[0020] In the optimized solution, an opening is provided at the upper end of the cavity of the mixing barrel 1, an end cover 16 is installed at the upper end of the mixing barrel 1, the end cover 16 is detachably connected to the mixing barrel 1, and an observation window 15 is provided on the barrel wall of the mixing barrel 1 for observing the stirring conditions inside the mixing barrel 1.

[0021] like Figures 2~4As shown, a stirring mechanism 2 and a liquid injection mechanism 4 are installed in the cavity of the stirring barrel 1, and the stirring mechanism 2 includes a main spiral blade 22, a secondary spiral blade 21, a first connecting frame 23 and a motor 24. The lower end of the stirring barrel 1 is fixedly connected to the motor 24 through a connecting sleeve 14, and the motor shaft of the motor 24 is fixedly connected to the lower end of the central axis of the main spiral blade 22 through a reciprocating mechanism 3. The upper end of the central axis of the main spiral blade 22 is connected to a plurality of secondary spiral blades 21 through a first connecting frame 23. A connecting through hole is provided on the first connecting frame 23, and the upper end of the central axis of the secondary spiral blade 21 is rotatably connected to the connecting through hole of the first connecting frame 23 through a bearing.

[0022] In the optimized solution, the plurality of secondary spiral blades 21 are uniformly arranged around the primary spiral blade 22 in a circular shape.

[0023] The upper end of the auxiliary helical blade 21 is connected to the driving assembly 25, and the driving assembly 25 can drive the auxiliary helical blade 21 to rotate around its own central axis.

[0024] The reciprocating mechanism 3 includes a reciprocating screw 32, a screw nut 33, a first guide rod 31 and a second guide rod 34. A through hole is provided on the lower end wall of the mixing barrel 1, and the screw nut 33 is installed in the through hole of the lower end wall of the mixing barrel 1. The reciprocating screw 32 cooperates with the screw nut 33. One end of the first guide rod 31 and the second guide rod 34 is a spline shaft, and the other end is an optical axis. The upper end of the reciprocating screw 32 is coaxially fixedly connected with the central axis of the main spiral blade 22, and a guide blind hole is provided at the lower end of the reciprocating screw 32. A keyway corresponding to the spline shaft of the first guide rod 31 is provided on the inner wall of the guide blind hole of the reciprocating screw 32. The spline shaft of the first guide rod 31 is inserted into the guide blind hole of the reciprocating screw 32 and cooperates with the keyway in the guide blind hole. The optical axis of the first guide rod 31 is fixedly connected to the motor shaft of the motor 24 through a coupling. When the motor 24 drives the first guide rod 31 to rotate, the first guide rod 31 drives the reciprocating screw 32 to rotate, so that the reciprocating screw 32 reciprocates up and down while rotating.

[0025] In the optimized solution, a guide sleeve is fixedly mounted on the upper end of the lead screw nut 33, and the central axis of the main spiral blade 22 is inserted into the guide sleeve and slidably cooperates with the guide sleeve.

[0026] The injection mechanism 4 includes a main liquid pipe 41, a first liquid dispensing pipe 44, a second liquid dispensing pipe 45 and an anti-blocking assembly 46. A through hole is provided at the center of the upper end wall of the end cover 16. The lower end of the main liquid pipe 41 passes through the through hole of the end cover 16 and is connected to the first liquid dispensing pipe 44 through a rotating joint 42. The first liquid dispensing pipe 44 is connected to the second liquid dispensing pipe 45 through a connecting pipe 43 and a bent joint.

[0027] The main liquid pipe 41 is connected to a container containing liquid medicine through a pipeline and a high-pressure pump.

[0028] A lumen is provided inside the central axis of the main spiral blade 22 and the auxiliary spiral blade 21, and a connecting hole is provided at the upper end of the central axis lumen. The lower end of the first liquid dispensing tube 44 passes through the connecting hole of the main spiral blade 22 and is inserted into its lumen. The lower end of the second liquid dispensing tube 45 passes through the connecting hole of the auxiliary spiral blade 21 and is inserted into its lumen.

[0029] In the optimized solution, the lower ends of the first liquid dispensing tube 44 and the second liquid dispensing tube 45 are respectively covered with sealing rings, and the sealing rings are respectively fitted with the inner walls of the corresponding central axis cavities.

[0030] The second guide rod 34 is provided with an axial hole at the axial position, and the second liquid dispensing tube 45 passes through the axial hole of the second guide rod 34, and the two are rotatably connected. A guide blind hole is provided at the upper end of the central axis of the auxiliary spiral blade 21, and a keyway corresponding to the spline shaft of the second guide rod 34 is provided on the inner wall of the guide blind hole. The spline shaft of the second guide rod 34 is inserted into the guide blind hole of the auxiliary spiral blade 21 and cooperates with the keyway of the guide blind hole.

[0031] The driving assembly 25 includes a gear 252 and a gear ring 251. The optical axis of the second guide rod 34 is fixedly connected to the gear 252 hole of the gear 252. The gear ring 251 is installed on the inner wall of the mixing barrel 1. The gear ring 251 is meshed with the gear 252. When the gear 252 rotates around the gear ring 251, it can rotate on its own, thereby driving the secondary spiral blade 21 to rotate on its own.

[0032] In the optimized solution, a second connecting frame 35 is fixedly installed on the outer side of the first dispensing tube 44. The second connecting frame 35 is provided with a through hole corresponding to the second guide rod 34. The optical axis of the second guide rod 34 passes through the through hole on the second connecting frame, and the two are rotatably connected via a bearing.

[0033] like Figure 5 As shown, the outer walls of the central axes of the main spiral blade 22 and the auxiliary spiral blade 21 are respectively provided with liquid outlets, which are connected with the tubular cavity of the central axis. An anti-blocking assembly 46 is installed at the liquid outlet of the central axis. The anti-blocking assembly 46 includes an anti-blocking tube 461, a valve core rod 462 and a piston 463. The outer end of the anti-blocking tube 461 is fixedly installed at the liquid outlet. The anti-blocking tube 461 is provided with a stepped hole. The outer end hole of the stepped hole is a small diameter hole, and the inner end hole is a large diameter hole. The small diameter hole is connected with the outside. A piston 463 is installed in the large diameter hole. The piston 463 fits with the inner wall of the large diameter hole, and the two slide together. A valve core rod 462 is fixedly installed on the outer end wall of the piston 463, and the valve core rod 462 is inserted in the small diameter hole. The outer wall of the valve core rod 462 fits with the inner wall of the small diameter hole to block the small diameter hole, and the valve core rod 462 slides with the small diameter hole.

[0034] The piston 463 is connected to the inner end wall of the large diameter hole through a spring 464. The inner wall of the large diameter hole between the piston 463 and the outer end wall of the large diameter hole is provided with a connecting hole, which connects the lumen of the central axis with the large diameter hole of the anti-blocking tube 461. When liquid enters the lumen of the central axis, it enters the large diameter hole of the anti-blocking tube 461 through the connecting hole. When the pressure of the liquid is greater than the elastic force of the spring 464, the liquid drives the piston 463 to compress the spring 464, so that the piston 463 drives the valve core rod 462 to move inward, so that the valve core rod 462 is pulled out of the small diameter hole, and the liquid is sprayed out from the liquid outlet.

[0035] In the optimized solution, a guide hole is provided at the inner end of the anti-blocking tube 461, and a third guide rod 465 is fixedly installed at the inner end of the piston 463. The third guide rod 465 is inserted into the guide hole and is slidably and sealedly connected to the guide hole.

[0036] In the optimized solution, the liquid outlet holes are distributed in a spiral shape along the axis of the central axis.

[0037] The operation process is as follows: when using the present invention, first pour the seeds from the feed hopper 13 into the mixing barrel 1, then start the mixing mechanism 2, the motor 24 drives the main spiral blade 22 to rotate, the main spiral blade 22 drives the auxiliary spiral blade 21 to revolve around the main spiral blade 22 through the first connecting frame 23, during the revolution of the auxiliary spiral blade 21, the gear ring 251 causes the gear 252 to rotate, thereby causing the auxiliary spiral blade 21 to rotate, during the rotation of the main spiral blade 22, the seeds at the bottom of the mixing barrel 1 are transported to the upper part, and during the rotation of the auxiliary spiral blade 21, the seeds at the upper part of the mixing barrel 1 are transported to the bottom, thereby causing the seeds to circulate in the mixing barrel 1.

[0038] During the rotation of the main spiral blade 22 and the auxiliary spiral blade 21, the high-pressure pump passes the liquid medicine in the container from the main liquid pipe 41 into the first liquid dispensing pipe 44 and the second liquid dispensing pipe 45 respectively, and then passes it into the lumen of the main spiral blade 22 from the first liquid dispensing pipe 44, and then passes it into the lumen of the auxiliary spiral blade 21 from the second liquid dispensing pipe 45. When the liquid medicine enters the lumen of the central axis, it enters the large diameter hole of the anti-blocking pipe 461 through the connecting hole. When the pressure exerted by the liquid medicine on the piston 463 is greater than the elastic force of the spring 464, When the medicine is sprayed, the pressure of the medicine on the piston 463 is reduced, and the spring 464 is reset, driving the valve core rod 462 to be reinserted into the small diameter hole to prevent the seeds from blocking the small diameter hole of the anti-blocking tube 461.

[0039] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A crop seed mixing machine, comprising a mixing barrel (1), a mixing mechanism (2) and a liquid injection mechanism (4), wherein the mixing barrel (1) is respectively provided with a feed hopper (13) and a discharge hopper (12), and the discharge hopper (12) is provided with a baffle plate (11); the characteristics are as follows: A stirring mechanism (2) and a liquid injection mechanism (4) are installed in the cavity of the stirring barrel (1). The stirring mechanism (2) comprises a main spiral blade (22), a secondary spiral blade (21), a first connecting frame (23) and a motor (24). The lower end of the stirring barrel (1) is connected to the motor (24). The motor shaft of the motor (24) is connected to the lower end of the central axis of the main spiral blade (22). The upper end of the central axis of the main spiral blade (22) is connected to a plurality of secondary spiral blades (21) via the first connecting frame (23). The first connecting frame (23) is provided with a connecting through hole. The upper end of the central axis of the secondary spiral blade (21) is rotatably connected to the connecting through hole of the first connecting frame (23) via a bearing. The upper end of the secondary spiral blade (21) is connected to the driving assembly (25).

2. The crop seed dressing machine according to claim 1, characterized in that: The plurality of secondary spiral blades (21) are uniformly arranged in a circular shape around the primary spiral blade (22).

3. The crop seed dressing machine according to claim 1, characterized in that: The motor shaft of the electric motor (24) is connected to the lower end of the central axis of the main spiral blade (22) through a reciprocating mechanism (3); the reciprocating mechanism (3) comprises a reciprocating screw (32), a screw nut (33), a first guide rod (31) and a second guide rod (34); a through hole is provided on the lower end wall of the mixing barrel (1); the screw nut (33) is installed in the through hole of the lower end wall of the mixing barrel (1); the reciprocating screw (32) and the screw nut (33) are matched; one end of the first guide rod (31) and the second guide rod (34) are spline shafts and the other ends are optical axes; the upper end of the reciprocating screw (32) is connected to the central axis of the main spiral blade (22); The reciprocating screw (32) is fixedly connected coaxially, a guide blind hole is provided at the lower end of the reciprocating screw (32), a keyway corresponding to the spline shaft of the first guide rod (31) is provided on the inner wall of the guide blind hole of the reciprocating screw (32), the spline shaft of the first guide rod (31) matches with the guide blind hole of the reciprocating screw (32), and the optical axis of the first guide rod (31) is connected to the motor shaft of the motor (24) through a coupling; a guide blind hole is provided at the upper end of the central axis of the auxiliary spiral blade (21), a keyway corresponding to the spline shaft of the second guide rod (34) is provided on the inner wall of the guide blind hole, and the spline shaft of the second guide rod (34) matches with the guide blind hole of the auxiliary spiral blade (21).

4. The crop seed dressing machine according to claim 3, characterized in that: The injection mechanism (4) comprises a main liquid pipe (41), a first liquid dispensing pipe (44), a second liquid dispensing pipe (45) and an anti-blocking assembly (46). A through hole is provided at the center of the upper end wall of the stirring barrel (1). The lower end of the main liquid pipe (41) passes through the through hole of the stirring barrel (1) and is connected to the first liquid dispensing pipe (44) via a rotating joint (42). The first liquid dispensing pipe (44) is connected to the second liquid dispensing pipe (45) via a connecting pipe (43) and a bent joint. The main liquid pipe (41) is connected to a container containing liquid medicine via a pipeline and a high-pressure pump. The main spiral blade (22) and the auxiliary spiral blade (2 1) has a lumen inside the central axis, the lower end of the first liquid dispensing tube (44) is inserted into the lumen of the main spiral blade (22), the lower end of the second liquid dispensing tube (45) is inserted into the lumen of the secondary spiral blade (21), an axial hole is provided at the axial center position of the second guide rod (34), the second liquid dispensing tube (45) passes through the axial hole of the second guide rod (34), and the two are rotatably connected; the outer walls of the central axes of the main spiral blade (22) and the secondary spiral blade (21) are respectively provided with liquid outlet holes, the liquid outlet holes are connected to the lumen of the central axis, and an anti-blocking assembly (46) is installed at the liquid outlet hole of the central axis.

5. The crop seed dressing machine according to claim 4, characterized in that: The lower ends of the first liquid dispensing tube (44) and the second liquid dispensing tube (45) are respectively covered with sealing rings, and the sealing rings are respectively fitted with the inner walls of the tube cavities of the corresponding central axes.

6. The crop seed dressing machine according to claim 3, characterized in that: The driving assembly (25) comprises a gear (252) and a gear ring (251); the optical axis of the second guide rod (34) is fixedly connected to the gear (252) hole of the gear (252); the gear ring (251) is mounted on the inner wall of the mixing barrel (1); and the gear ring (251) is internally meshed with the gear (252).

7. The crop seed dressing machine according to claim 4, characterized in that: The anti-blocking assembly (46) comprises an anti-blocking tube (461), a valve core rod (462) and a piston (463). The outer end of the anti-blocking tube (461) is installed at the liquid outlet. The anti-blocking tube (461) is provided with a stepped hole. The outer end hole of the stepped hole is a small diameter hole, and the inner end hole is a large diameter hole. The small diameter hole is connected to the outside. The piston (463) is installed in the large diameter hole. The piston (463) fits with the inner wall of the large diameter hole. The two are slidably matched. The valve core is fixedly installed on the outer end wall of the piston (463). Rod (462), the valve core rod (462) is inserted into the small diameter hole, the outer wall of the valve core rod (462) fits with the inner wall of the small diameter hole to block the small diameter hole, and the valve core rod (462) slides with the small diameter hole; the piston (463) is connected to the inner end wall of the large diameter hole through a spring (464), and a connecting hole is provided on the inner wall of the large diameter hole between the piston (463) and the outer end wall of the large diameter hole, and the connecting hole connects the tube cavity of the central axis with the large diameter hole of the anti-blocking tube (461).

8. The crop seed dressing machine according to claim 7, characterized in that: The inner end of the anti-blocking tube (461) is provided with a guide hole, and the inner end of the piston (463) is fixedly mounted with a guide rod, which is inserted into the guide hole and is slidably and sealingly connected to the guide hole.

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