A device for mixing trichosanthes seeds and seed coating agent

Abstract

The present invention belongs to the field of mixing equipment, and specifically, relates to a device for mixing Trichosanthes seeds and seed coating agents, which includes a stirring tank, a lifting stirring paddle, and a belt drive mechanism. The stirring tank includes a tank body, and the lifting stirring paddle includes a hollow stirring shaft, a double-helix stirring blade, and an aeration ring. The outer portion of the lower part of the tank body is provided with an ultrasonic auxiliary vibration tank for applying vibration to the tank body. The present invention can mix and coat a large number of Trichosanthes seeds and seed coating agents at one time, and adopts a segmented discharging method to complete the mixing and coating in a short time at a relatively low speed, and the seed coating agent has a good mixing and dispersing effect; it can avoid mechanical damage to the Trichosanthes seeds caused by high-speed stirring. Even if the seed coating agent contains an oily pesticide composition and a binder with a relatively high viscosity, the seed coating agent can be mixed and dispersed by using the Trichosanthes seeds and seed coating agent mixing device of the present invention, and the mixing and dispersing effect of the seed coating agent is also very good.

Description

Technical Field

[0001] The invention belongs to the technical field of mixing equipment, and particularly relates to a device for mixing trichosanthes seeds and a seed coating agent. Background Art

[0002] The fruit of Trichosanthes seeds is ovate, flat and oval, with a light brown to brown surface, smooth, a circle of grooves on the edge, a pointed hilum at the top, and a blunt or narrow base. The seed coat is hard, and after cutting it open, the inner seed coat is membranous, grayish white to grayish green, with two yellowish white cotyledons, rich in oil.

[0003] Trichosanthes seeds usually need to be mixed with seed coating agents according to planting needs.

[0004] Seed coating agents are available in liquid and solid powder form. Some are prefabricated for long-term storage, while others are made and used immediately. They are developed on the basis of suspensions, powders, and wettable powders. The active ingredients are required to be gradually released without any toxic effects on the germination and growth of crops. The seed coating film is water-permeable and air-permeable, and does not affect the life and respiration of seeds. Seed coating agents are highly efficient, economical, safe, long-lasting, and multifunctional.

[0005] Seed coating agents contain different pesticide ingredients, have a certain color and a molded appearance. Using this agent to coat seeds can prevent the invasion of pests and diseases in the soil after sowing. At the same time, as the seeds germinate and emerge from the soil, the agent is gradually released from the seed coating and absorbed by the crops, which can also prevent and control aboveground pests and diseases.

[0006] For the seeds of Trichosanthes kirilowii, the mixed coating seed coating agent usually involves coating the moist seeds of Trichosanthes kirilowii with a pesticide composition containing a binder, so that a protective layer with certain functions and coating strength is formed on the outside of the seeds. This process is called seed coating, and the combined substance wrapped outside the seeds is called the seed coating agent. The active ingredients (pesticide composition) commonly used in the seed coating agent for Trichosanthes kirilowii mainly include fipronil, fludioxonil, metalaxyl-M, imidacloprid, difenoconazole, carbendazim, thiram, carbofuran, etc. The main function of the binder used in the seed coating agent is to ensure that the seed coating agent forms a firm protective layer on the surface of the seeds, while allowing water to pass through to promote the normal germination of the seeds. Commonly used binders include polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), gum arabic, xanthan gum, starch, etc. At present, when the seeds of Trichosanthes kirilowii and the seed coating agent are mixed and coated, the mixed coating operation is usually completed by stirring in a stirring tank. However, when xanthan gum, polyvinyl alcohol, gum arabic and carboxymethyl cellulose are used as binders, their viscosity is very high. For special seeds such as Trichosanthes seeds with grooves and hilum structures, coating defects are prone to occur in the grooves and hilums, resulting in the inability to form a 100% coating protective layer, which may cause defects in the use of such Trichosanthes seeds; especially oily pesticide compositions, such as fenpropimorph, fipronil, etc., oily pesticide compositions plus binders with high viscosity will aggravate the occurrence of coating defects.

[0007] Based on this, the present invention is proposed. Summary of the invention

[0008] The object of the present invention is to provide a device for mixing Trichosanthes kirilowii seeds and seed coating agent to solve the above-mentioned problems.

[0009] A device for mixing trichosanthes seeds and seed coating agents, comprising a stirring tank and a lifting stirring paddle, the stirring tank comprising a tank body and a belt driving mechanism for driving the tank body to rotate, the lifting stirring paddle comprising a hollow stirring shaft, a double helical stirring blade, and an aeration ring for aerating the tank body, an ultrasonic auxiliary vibration tank for applying vibration to the tank body is arranged on the outside of the lower part of the tank body, and the rotation direction of the tank body is opposite to the rotation direction of the hollow stirring shaft; the ultrasonic auxiliary vibration tank comprises a water tank, a plurality of ultrasonic transducers are embedded in the bottom of the water tank, and all ultrasonic transducers are located below the bottom of the tank body; a discharge pipe installation opening is arranged at the center of the bottom of the tank body, a discharge pipe is arranged at the discharge pipe installation opening, an upper end of the discharge pipe is rotatably connected to the discharge pipe installation opening by arranging a first bearing, a lower end of the discharge pipe passes through the bottom of the water tank and is located below the bottom of the water tank, and the discharge pipe is sealed and connected to the bottom of the water tank; water is arranged inside the water tank to completely submerge the lower part of the tank body;

[0010] The lower end of the hollow stirring shaft is coaxially connected with an inverted cone head for completely covering the installation opening of the discharge pipe;

[0011] A vertical tube coaxially arranged with the hollow stirring shaft is also arranged above the hollow stirring shaft, the vertical tube and the hollow stirring shaft are rotatably connected by a second bearing, the inner cavity of the vertical tube is communicated with the inner cavity of the hollow stirring shaft; the vertical tube is externally connected to an air source, and the air source generates compressed gas; a plurality of air holes are arranged on the surface of the aeration ring, the inner cavity of the aeration ring is communicated with the inner cavity of the hollow stirring shaft, and a plurality of annular piezoelectric ceramics are arranged inside the aeration ring;

[0012] The compressed gas is made by mixing compressed air and carbon dioxide in a volume ratio of 100: (3.6-3.7). In a further improvement, the belt drive mechanism includes a first pulley sleeved on the upper end of the tank body, a transmission belt adapted to the first pulley, a second pulley adapted to the transmission belt, and a first motor for driving the second pulley to rotate.

[0013] As a further improvement, the belt driving mechanism further comprises a clamping roller and a cylinder arranged on the outside of the transmission belt, and the clamping roller is driven by the cylinder to clamp the transmission belt.

[0014] As a further improvement, the lifting agitator paddle also includes a pneumatic lifting column, a power head, and a second motor. The power head and the hollow agitator shaft are driven by the pneumatic lifting column to perform lifting operations. The power head is provided with a first sprocket for driving the hollow agitator shaft to rotate, a transmission chain matched with the first sprocket, and a second sprocket matched with the transmission chain. The second sprocket is driven to rotate by a second motor.

[0015] A further improvement is that the upper end of the water tank is provided with an inward turn-down edge, and a gap is provided between the inward turn-down edge and the trough body; the upper part of the water tank is provided with an electromagnetic knocking mechanism for knocking the trough body, and the electromagnetic knocking mechanism includes a plurality of symmetrically distributed electromagnetic knocking units, and the electromagnetic knocking unit includes a magnetic ball, a spring sheet, and an electromagnet matched with the magnetic ball; the upper end of the spring sheet is provided with a mounting portion connected to the inward turn-down edge, and the angle between the length direction of the spring sheet and the axial direction of the trough body is an acute angle, and the electromagnet is embedded in the side wall of the water tank.

[0016] A further improvement is that when the electromagnet is energized, the electromagnet generates a magnetic force that repels the magnetic ball and drives the magnetic ball to hit the tank body;

[0017] All electromagnetic knocking units of the electromagnetic knocking mechanism are powered on in turn in a clockwise order to knock the tank body, the power-on time interval between two adjacent electromagnetic knocking units is x, 1s≤x≤2s, and the power-on time of each electromagnetic knocking unit is y, 1s≤y≤2s; the rotation direction of the tank body is counterclockwise, and the rotation direction of the hollow stirring shaft is clockwise;

[0018] When the magnetic ball hits the tank body, the lowest end of the magnetic ball is flush with the water surface in the tank.

[0019] As a further improvement, the double-helical stirring blade is composed of two helical blades with opposite rotation directions, and the magnetic ball is made of a hemispherical permanent magnet and a hemispherical lead ball.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The device for mixing Trichosanthes kirilowii seeds and seed coating agents of the present invention can be used to mix and coat a large number of Trichosanthes kirilowii seeds and seed coating agents at one time. By adopting a segmented discharging method, the mixing and coating can be completed in a short time at a relatively low rotation speed (not exceeding 200r / min), and the mixing and dispersing effect of the seed coating agent is good.

[0022] 2. It can avoid the mechanical damage to Trichosanthes seeds caused by high-speed stirring.

[0023] 3. Even if the seed coating agent contains an oily pesticide composition and a binder with high viscosity, the seed coating agent can be mixed and dispersed by using the device for mixing Trichosanthes seeds and seed coating agent of the present invention. The mixing and dispersion effect of the seed coating agent is also very good, the coating completeness rate can reach 97%, the seed coating agent loss rate can be as low as 5%, and the coating defects and unevenness are significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a device for mixing Trichosanthes kirilowii seeds and a seed coating agent according to the present invention;

[0025] Figure 2 It is a schematic diagram of the interior of the stirring tank and the ultrasonic assisted vibration tank of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the electromagnetic knocking unit of the present invention;

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 10. stirring tank; 101. tank body; 11. discharge pipe; 12. first bearing;

[0029] 21. Hollow stirring shaft; 22. Double helical stirring blades; 23. Aeration ring; 231. Air hole; 24. Cone head; 25. Vertical pipe;

[0030] 30. Ultrasonic assisted vibration tank; 31. Water tank; 311. Inner flange; 312. Annular space; 32. Ultrasonic transducer;

[0031] 40. Pneumatic lifting column; 51. Power head; 52. Second motor;

[0032] 61. first pulley; 62. transmission belt; 63. second pulley; 64. first motor; 65. pressure roller; 66. cylinder;

[0033] 71. Magnetic ball; 72. Electromagnet; 73. Shrapnel; 731. Mounting part. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0035] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0037] like Figure 1 , 2 As shown, the device for mixing Trichosanthes seeds and seed coating agent comprises a stirring tank 10 and a lifting stirring paddle, wherein the stirring tank 10 comprises a tank body 101; the device for mixing Trichosanthes seeds and seed coating agent also comprises a belt drive mechanism for driving the tank body 101 to rotate, the lifting stirring paddle comprises a hollow stirring shaft 21, a double helical stirring blade 22, and an aeration ring 23 for aerating the tank body 101, an ultrasonic auxiliary vibration tank 30 for applying vibration to the tank body 101 is arranged on the outside of the lower part of the tank body 101, and the rotation direction of the tank body 101 is opposite to the rotation direction of the hollow stirring shaft 21.

[0038] The ultrasonic assisted vibration tank 30 includes a water tank 31, and a plurality of ultrasonic transducers 32 are embedded in the bottom of the water tank 31, and all ultrasonic transducers 32 are located below the bottom of the tank body 101; a discharge pipe installation port is provided in the center of the bottom of the tank body 101, and a discharge pipe 11 is provided at the discharge pipe installation port, and the upper end of the discharge pipe 11 is rotatably connected to the discharge pipe installation port by providing a first bearing 12, and the lower end of the discharge pipe 11 passes through the bottom of the water tank 31 and is located below the bottom of the water tank 31, and the discharge pipe 11 is sealed and connected to the bottom of the water tank 31; the interior of the water tank 31 is provided with water that completely submerges the lower part of the tank body 101.

[0039] The lower end of the hollow stirring shaft 21 is coaxially connected with an inverted cone head 24 for completely covering the installation opening of the discharge pipe. Example 2

[0040] In Example 1, the belt drive mechanism includes a first pulley 61 mounted on the upper end of the trough body 101, a transmission belt 62 matched with the first pulley 61, a second pulley 63 matched with the transmission belt 62, and a first motor 64 for driving the second pulley 63 to rotate.

[0041] The second pulley 63 is driven to rotate by the first motor 64 , thereby driving the first pulley 61 and the tank body 101 to rotate through the transmission belt 62 . Example 3

[0042] In Example 1, to ensure that there is no slipping, the belt driving mechanism further includes a clamping roller 65 and a cylinder 66 disposed on the outside of the transmission belt 62 . The clamping roller 65 is driven by the cylinder 66 to clamp the transmission belt 62 .

[0043] The cylinder 66 drives the pressing roller 65 to press the transmission belt 62 , thereby adjusting the tension of the transmission belt 62 . Example 4

[0044] In Example 1, the lifting agitator paddle also includes a pneumatic lifting column 40, a power head 51, and a second motor 52. The power head 51 and the hollow agitator shaft 21 are driven by the pneumatic lifting column 40 to perform lifting operations. The power head 51 is provided with a first sprocket for driving the hollow agitator shaft 21 to rotate, a transmission chain matched with the first sprocket, and a second sprocket matched with the transmission chain. The second sprocket is driven to rotate by the second motor 52.

[0045] The power head 51 is raised and lowered by the pneumatic lifting column 40 , and the hollow stirring shaft 21 and the double-helical stirring blades 22 are driven to rotate by the second motor 52 , thereby performing a stirring operation. Example 5

[0046] In Example 1, a vertical tube 25 coaxially arranged with the hollow stirring shaft 21 is further arranged above the hollow stirring shaft 21, the vertical tube 25 and the hollow stirring shaft 21 are rotatably connected by a second bearing, and the inner cavity of the vertical tube 25 is communicated with the inner cavity of the hollow stirring shaft 21; the vertical tube 25 is connected to an external air source through a hose, and the air source generates compressed gas; a plurality of air holes 231 are arranged on the surface of the aeration ring 23, the inner cavity of the aeration ring 23 is communicated with the inner cavity of the hollow stirring shaft 21, and a plurality of annular piezoelectric ceramics are arranged inside the aeration ring 23;

[0047] The compressed gas is prepared by mixing compressed air and carbon dioxide in a volume ratio of 100:(3.6~3.7).

[0048] As the compressed gas generated by the gas source is transported to the aeration ring 23 through the vertical pipe 25 and the hollow stirring shaft 21 and sprayed into the tank body 101 through the air hole 231, the piezoelectric ceramic is energized to generate high-frequency vibration, thereby atomizing the water droplets. Even if there are water droplets nearby, they will be atomized again under the action of the piezoelectric ceramic, ultimately causing the various components of the compressed gas sprayed into the tank body 101 to be evenly distributed.

[0049] like Figure 3 As shown, the upper end of the water trough 31 is provided with an inner flange 311, and a gap is provided between the inner flange 311 and the trough body 101; the upper part of the water trough 31 is provided with an electromagnetic knocking mechanism for knocking the trough body 101, and the electromagnetic knocking mechanism includes a plurality of symmetrically distributed electromagnetic knocking units, and the electromagnetic knocking unit includes a magnetic ball 71, a spring piece 73, and an electromagnet 72 adapted to the magnetic ball 71, and the upper end of the spring piece 73 is provided with a mounting portion 731 connected to the inner flange 311, and the angle between the length direction of the spring piece 73 and the axial direction of the trough body 101 is an acute angle, and the electromagnet 72 is embedded in the side wall of the water trough 31.

[0050] When the electromagnet 72 is powered on, the electromagnet 72 generates a magnetic force that repels the magnetic ball 71 and drives the magnetic ball 71 to hit the slot 101 ; when the electromagnet 72 is powered off, the magnetic force disappears, and the magnetic ball 71 falls back under the dual effects of gravity and the elastic force of the spring 73 .

[0051] All electromagnetic knocking units of the electromagnetic knocking mechanism are powered on in turn in a clockwise order to knock the trough body 101, the power-on time interval between two adjacent electromagnetic knocking units is x, 1s≤x≤2s, and the power-on time of each electromagnetic knocking unit is y, 1s≤y≤2s; the rotation direction of the trough body 101 is counterclockwise, and the rotation direction of the hollow stirring shaft 21 is clockwise; for example, electromagnetic knocking units are provided, which are arranged in a clockwise order, namely the 1st to 8th electromagnetic knocking units; then the first electromagnetic knocking unit is powered on and immediately powered off 1.5s later, and then after an interval of 1s, the second electromagnetic knocking unit is powered on and immediately powered off 1.5s later, and after an interval of 1s, the third electromagnetic knocking unit is powered on and immediately powered off 1.5s later... until the eighth electromagnetic knocking unit is powered on and immediately powered off 1.5s later, with an interval of 1s; thereafter, the first electromagnetic knocking unit is powered on and immediately powered off 1.5s later... and the cycle repeats.

[0052] When the magnetic ball 71 hits the tank body 101, the lowest end of the magnetic ball 71 is flush with the water surface in the water tank 31. In the process of the magnetic ball 71 falling back, the magnetic ball 71 will hit the water surface, thereby generating waves, bubbles, etc., which will further intensify the ultrasonic vibration effect.

[0053] An annular space 312 is provided in the water tank 31 above the water surface, and is mainly used to provide space for the magnetic ball 71 and the shrapnel 73 to move.

[0054] The double helical stirring blade 22 is composed of two helical blades with opposite rotation directions, and the magnetic ball 71 is made of a hemispherical permanent magnet and a hemispherical lead ball.

[0055] The permanent magnet is arranged close to the electromagnet 72 , and the lead ball is arranged close to the slot body 101 .

[0056] The process of mixing the Trichosanthes seeds and the seed coating agent by the Trichosanthes seeds and seed coating agent mixing device is as follows:

[0057] 1. First, move the hollow stirring shaft 21 and the cone head 24 downward until the cone head 24 completely covers and blocks the installation opening of the discharge pipe, and then pour the Trichosanthes seeds and the seed coating agent into the tank body 101 according to the usage ratio of the seed coating agent.

[0058] 2. Start the belt drive mechanism, the tank body 101 rotates, the speed of the tank body 101 is 10r / min, start the power head 51, the hollow stirring shaft 21 rotates, the speed of the hollow stirring shaft 21 is 120r / min, the ultrasonic frequencies of all ultrasonic transducers 32 are 20kHz, x=1s, y=1.5s; the flow rate of aeration from the aeration ring 23 to the tank body 101 is 9.3±0.5L / min.

[0059] 3. After mixing and stirring for 6 minutes, the lifting stirring paddle is lifted, the cone head 24 moves upward, the discharging pipe installation port is opened, and the mixed and coated Trichosanthes seeds are discharged from the discharging pipe 11.

[0060] 4. After 3 minutes of discharging at the discharge pipe 11, the lifting stirring paddle descends, and the cone head 24 moves downward until it covers the installation opening of the discharge pipe. The structure of the cone head 24 can minimize the number of Trichosanthes seeds that are crushed; then, continue mixing and stirring until all the Trichosanthes seeds in the tank body 101 are mixed, coated and discharged.

[0061] In the present invention, a large number of Trichosanthes seeds and seed coating agents can be mixed and coated at one time by the Trichosanthes seeds and seed coating agent mixing device, and the mixed coating can be completed in a short time at a relatively low speed (not exceeding 200r / min) by adopting a segmented discharging method, and the mixed coating effect is good. At the same time, mechanical damage to the Trichosanthes seeds caused by high-speed stirring can be avoided.

[0062] Coating integrity characterization test, the test method is as follows:

[0063] Before coating, all the seeds of Trichosanthes kirilowii were dried, and the moisture content of the seeds before coating was controlled to be 14.5%±0.2%, and then the coating was carried out. Because the seed coating agent contains pigments, after the coating is completed, 50 seeds are randomly sampled and observed with a magnifying glass to see whether they are completely coated, focusing on the grooves and hilum areas. If an uncoated area is found, the Trichosanthes kirilowii seed is classified as an incompletely coated seed; otherwise, it is a completely coated seed. Coating complete rate = coated complete seeds / 50; in this way, measure three times and take the average.

[0064] Test Example 1

[0065] Test Group A1: The seed coating agent was fenpropimorph suspended seed coating agent (purchased from Shandong Lushi Pesticide Co., Ltd., fenpropimorph mass fraction of 3%, carboxymethyl cellulose as a binder). When used, shake well first, dilute with 5 times water to obtain a diluted solution, the weight ratio of the diluted solution to the Trichosanthes seeds was 1:50, the Trichosanthes seeds were 5kg, and the prototype was made by reducing the Trichosanthes seeds and seed coating agent mixing device according to a ratio of 1:4, and the rated volume in the tank was 25L; mixing and stirring were carried out for coating, and after stirring for 6 minutes, the coating integrity characterization test was tested, and the coating integrity rate = 97%.

[0066] Test Group B1: The only difference from Test Group A1 is that the seed coating agent used in this group is a fipronil suspension seed coating agent (purchased from Foshan Yinghui Crop Science Co., Ltd., with a mass fraction of 8% fipronil and polyvinyl alcohol as a binder). When using, shake well first, dilute with 5 times water to obtain a diluted solution, the weight ratio of the diluted solution to the Trichosanthes seeds is 1:35, the Trichosanthes seeds are 5kg, and the prototype of Test Group A1 is used for mixing, stirring and coating. After stirring for 6 minutes, according to the coating integrity characterization test, the coating integrity rate = 95%. According to the coating uniformity characterization test, δ is 103. According to the seed coating agent loss characterization test, the seed coating agent loss rate is 4.7%.

[0067] Experiment Group C1: The only difference from Experiment Group A1 is that the seed coating agent used in this group is metalaxyl seed coating agent (purchased from Hebei Lukuan Agricultural Technology Co., Ltd., with a mass fraction of metalaxyl of 6.25%, and low-viscosity starch as a binder). When used, the seed coating agent was diluted with 5 times water, and the weight ratio of the seed coating agent to Trichosanthes seeds was 1:200. The Trichosanthes seeds were 5kg. The prototype of Experiment Group A was used for mixing, stirring and coating. After stirring for 5 minutes, the coating integrity characterization test was used and the coating integrity rate = 99%.

[0068] Experimental Group D1: The only difference from Experimental Group A1 is that the seed coating agent used in this group is imidacloprid seed coating agent (purchased from Henan Guorenfu Biotechnology Co., Ltd., with an imidacloprid mass fraction of 2.7% and low-viscosity starch as a binder). When used, the seed coating agent was diluted with 5 times water, and the weight ratio of the seed coating agent to Trichosanthes seeds was 1:250. The Trichosanthes seeds were 5kg. The prototype of Experimental Group A was used for mixing, stirring and coating. After stirring for 5 minutes, the coating integrity characterization test was used and the coating integrity rate = 100%.

[0069] Comparative Example 1

[0070] Test group A2: The difference between this group and test group A1 is that all ultrasonic transducers 32 are not activated, and the rest are the same; finally, the coating completeness rate = 81%.

[0071] Test group B2: The difference between this group and test group B1 is that all ultrasonic transducers 32 are not activated, and the rest are the same; finally, the coating completeness rate = 77%.

[0072] Test group C2: The difference between this group and test group C1 is that all ultrasonic transducers 32 are not activated, and the rest are the same; finally, the coating completeness rate = 93%.

[0073] Test D2 group: the difference between this group and the test D1 group is that all ultrasonic transducers 32 are not started, and the rest are the same; finally, the coating completeness rate = 99%.

[0074] Test group B3: The difference between this group and test group B2 is that this group was mixed and stirred for 20 minutes, and finally, the coating completeness rate = 79%.

[0075] Test group B4: the difference between this group and test group B2 is that the rotation speed of the hollow stirring shaft in this group is 600 r / min, the coating completeness rate after mixing and stirring for 6 minutes = 83%, and the coating completeness rate after mixing and stirring for 15 minutes = 86%.

[0076] From the above, it can be seen that if the seed coating agent (such as test group C2 and test group D2) contains a non-oily pesticide composition and a binder with low viscosity, the coating integrity rate exceeds 93% by stirring alone. However, if the seed coating agent contains an oily pesticide composition and a binder with high viscosity, the coating integrity rate cannot be significantly improved by stirring at high speed and for a long time.

[0077] Coating uniformity characterization test, the test method is as follows:

[0078] The average weight of Trichosanthes seeds before coating (with a moisture content of 14.5% ± 0.2%) (randomly sampled twice, with 200 seeds in each sample) is m 1 The coated Trichosanthes seeds were dried in an oven at 60-70°C until the moisture content was 14.5%±0.2%. Then, random samples were taken and weighed. The average weight of the coated Trichosanthes seeds was calculated as m 2 . Coating weight gain is m 3 , m 3 =m 2 -m 1 , unit mg; calculate m 3 The standard deviation of is δ. The larger δ is, the worse the uniformity of the coating is.

[0079] Comparative Example 2

[0080] Test E1 group, the difference between this group and test B1 group is that all aeration rings 23 are stopped aeration, and the rest are the same; finally, stirring for 6 minutes, coating completeness = 89%. According to the coating uniformity characterization test test, δ is 292.

[0081] Test group E2: The difference between this group and test group E1 is that stirring was performed for 20 min, and the rest were the same; finally, the coating completeness rate = 92%, and δ was 275.

[0082] Experiment E3 group: The difference between this group and Experiment E1 group is that the compressed gas used in this group is compressed air, and the rest are the same; finally, δ is 251.

[0083] Experiment E4 group: The difference between this group and Experiment E1 group is that the compressed gas used in this group is carbon dioxide, and the rest are the same; finally, δ is 269.

[0084] From the above, it can be seen that if the seed coating contains an oily pesticide composition and a high-viscosity binder, ultrasound + stirring + introduction of a specific concentration of carbon dioxide must be used to significantly improve the mixing and dispersion effect of the seed coating and Trichosanthes seeds. If a specific concentration of carbon dioxide is not introduced, it is not enough to simply extend the mixing and stirring time.

[0085] Seed dressing agent loss characterization test, the test method is as follows:

[0086] The Trichosanthes seeds before coating are dried in an oven at 60-70°C until the moisture content is 14.5%±0.2%, and then the total weight is weighed to obtain the total weight of the Trichosanthes seeds before coating. The Trichosanthes seeds after coating are dried in an oven at 60-70°C until the moisture content is 14.5%±0.2%, and then the total weight is weighed, and then the total weight of the Trichosanthes seeds before coating is subtracted to obtain the actual total weight gain of coating.

[0087] Seed coating agent loss rate = (seed coating agent formula dosage - actual total coating weight gain) / seed coating agent formula dosage. The seed coating agent formula dosage can be calculated by weighing in advance.

[0088] Comparative Example 3

[0089] Test group F1: the difference between this group and test group B1 is that all electromagnetic knocking units of the electromagnetic knocking mechanism are energized to knock the trough body 101 in a counterclockwise order, that is, the direction of rotation is the same as that of the trough body 101, and the rest are the same; coating integrity rate = 94%, δ is 159, and the seed coating agent loss rate is 8.1%.

[0090] Test group F2: the difference between this group and test group B1 is that all electromagnetic knocking units of the electromagnetic knocking mechanism are energized to knock the tank body 101 at the same time, and the rest are the same; coating integrity rate = 95%, and seed coating agent loss rate is 12.3%.

[0091] Test group F3: The difference between this group and test group B1 is that the magnetic ball 71 never contacts the water surface in the water tank 31 during the movement, and the rest are the same; finally, the seed dressing agent loss rate is 15.1%.

[0092] It was found in the experiment that the factors that mainly affect the loss rate of the seed dressing agent are: the power-on sequence and direction of all the electromagnetic knocking units of the electromagnetic knocking mechanism and the degree of contact between the magnetic ball 71 and the water surface in the water tank 31 during movement; when the water surface in the water tank 31 always submerges the magnetic ball 71, the knocking effect will be weakened; in the present invention, the magnetic ball 71 is only in contact with the water surface in the water tank 31 when it is at the lowest end. At this time, the ripples on the water surface caused by the ultrasonic vibration will again produce violent multiple collisions with the magnetic ball 71, thereby intensifying the vibration intensity of the water inside the water tank 31, and ultimately effectively reducing the loss rate of the seed dressing agent.

[0093] In the continuous production process, the lower the seed coating agent loss rate, the smaller the error caused.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for mixing Trichosanthes kirilowii seeds and seed coating agent, comprising a stirring tank (10) and a lifting stirring paddle, wherein the stirring tank (10) comprises a tank body (101), characterized in that: It also includes a belt drive mechanism for driving the tank body (101) to rotate, the lifting stirring paddle includes a hollow stirring shaft (21), a double helical stirring blade (22), and an aeration ring (23) for aerating the tank body (101), an ultrasonic auxiliary vibration tank (30) for applying vibration to the tank body (101) is arranged on the outside of the lower part of the tank body (101), and the rotation direction of the tank body (101) is opposite to the rotation direction of the hollow stirring shaft (21); The ultrasonic auxiliary vibration tank (30) comprises a water tank (31), the bottom of the water tank (31) being embedded with a plurality of ultrasonic transducers (32), all of which are located below the bottom of the tank body (101); a discharge pipe installation opening is provided at the center of the bottom of the tank body (101), a discharge pipe (11) is provided at the discharge pipe installation opening, the upper end of the discharge pipe (11) is rotatably connected to the discharge pipe installation opening by providing a first bearing (12), the lower end of the discharge pipe (11) passes through the bottom of the water tank (31) and is located below the bottom of the water tank (31), the discharge pipe (11) is sealedly connected to the bottom of the water tank (31); water is provided inside the water tank (31) to completely submerge the lower part of the tank body (101); The lower end of the hollow stirring shaft (21) is coaxially connected with an inverted cone head (24) for completely covering the installation opening of the discharge pipe; A vertical tube (25) is also provided above the hollow stirring shaft (21) and is coaxially arranged with the hollow stirring shaft (21); the vertical tube (25) and the hollow stirring shaft (21) are rotatably connected via a second bearing; the inner cavity of the vertical tube (25) is in communication with the inner cavity of the hollow stirring shaft (21); the vertical tube (25) is externally connected to an air source, and the air source generates compressed gas; a plurality of air holes (231) are provided on the surface of the aeration ring (23); the inner cavity of the aeration ring (23) is in communication with the inner cavity of the hollow stirring shaft (21); and a plurality of annular piezoelectric ceramics are provided inside the aeration ring (23); The compressed gas is prepared by mixing compressed air and carbon dioxide in a volume ratio of 100:(3.6~3.7); An inner turning edge (311) is provided at the upper end of the water tank (31), and a gap is provided between the inner turning edge (311) and the tank body (101); an electromagnetic knocking mechanism for knocking the tank body (101) is provided at the upper part of the water tank (31), the electromagnetic knocking mechanism comprising a plurality of symmetrically distributed electromagnetic knocking units, the electromagnetic knocking units comprising a magnetic ball (71), a spring sheet (73), and an electromagnet (72) adapted to the magnetic ball (71); a mounting portion (731) connected to the inner turning edge (311) is provided at the upper end of the spring sheet (73); the angle between the length direction of the spring sheet (73) and the axial direction of the tank body (101) is an acute angle, and the electromagnet (72) is embedded in the side wall of the water tank (31); When the electromagnet (72) is energized, the electromagnet (72) generates a magnetic force that repels the magnetic ball (71) and drives the magnetic ball (71) to strike the slot body (101); All electromagnetic knocking units of the electromagnetic knocking mechanism are powered on in sequence in a clockwise order to knock the tank body (101), the power-on time interval between two adjacent electromagnetic knocking units is x, 1s≤x≤2s, and the power-on time of each electromagnetic knocking unit is y, 1s≤y≤2s; the tank body (101) rotates counterclockwise, and the hollow stirring shaft (21) rotates clockwise; When the magnetic ball (71) strikes the tank body (101), the lowest end of the magnetic ball (71) is flush with the water surface in the water tank (31).

2. A device for mixing Trichosanthes kirilowii seeds and seed coating agent according to claim 1, characterized in that: The belt drive mechanism comprises a first pulley (61) sleeved on the upper end of the trough body (101), a transmission belt (62) matched with the first pulley (61), a second pulley (63) matched with the transmission belt (62), and a first motor (64) for driving the second pulley (63) to rotate.

3. A device for mixing Trichosanthes kirilowii seeds and seed coating agent according to claim 2, characterized in that: The belt driving mechanism further comprises a pressing roller (65) and a cylinder (66) arranged on the outside of the transmission belt (62); the pressing roller (65) is driven by the cylinder (66) to press the transmission belt (62).

4. A device for mixing Trichosanthes kirilowii seeds and seed coating agent according to claim 1, characterized in that: The lifting agitator further comprises a pneumatic lifting column (40), a power head (51), and a second motor (52); the power head (51) and the hollow agitator shaft (21) are driven by the pneumatic lifting column (40) to perform a lifting operation; a first sprocket wheel for driving the hollow agitator shaft (21) to rotate, a transmission chain matched with the first sprocket wheel, and a second sprocket wheel matched with the transmission chain are arranged in the power head (51); the second sprocket wheel is driven to rotate by the second motor (52).

5. The device for mixing Trichosanthes kirilowii seeds and seed coating agent according to claim 1, characterized in that: The double helical stirring blade (22) is composed of two helical blades with opposite rotation directions, and the magnetic ball (71) is made of a hemispherical permanent magnet and a hemispherical lead ball.

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