Selenium-rich liquid water-soluble fertilizer preparation equipment

By designing selenium-rich liquid water-soluble fertilizer preparation equipment for supporting components, loading components, pumping components, stirring components and quantitative components, the problem of inconvenience and rapid quantitative feeding and stirring of existing equipment during use is solved, and the rapidity of multiple solutions is achieved Mixed effect.

CN222240077UActive Publication Date: 2024-12-27NINGXIA UNIVERSITY
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Patent Information

Application Number
CN202420827285.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-19
Publication Date
2024-12-27
Estimated Expiration
2034-04-19

AI Technical Summary

Technical Problem

The existing water-soluble fertilizer preparation equipment is not convenient to quickly and quantitatively feed and stir various nutrient solutions during use, and it is difficult to quickly mix the nutrients of each component.

Method used

A selenium-rich liquid water-soluble fertilizer preparation equipment including support components, bearing components, pumping components, stirring components, quantification components and injection components is designed. The solution volume is quickly measured through the quantitative components, and the solution in the quantitative components is slowly dripping into the bearing. Install the components, combining the stirring components and the pumping components to achieve rapid stirring and circulating flow of the solution, improving the mixing effect.

Benefits of technology

The rapid mixing of multiple solutions is achieved, and the difficulty of quantitative feeding and stirring of existing equipment during use is solved, which improves the mixing effect of nutrients.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of water-soluble fertilizer preparation equipment, in particular to selenium-rich liquid water-soluble fertilizer preparation equipment. The technical problems that when water-soluble fertilizer preparation equipment in the prior art is used, rapid quantitative feeding and stirring of various nutrient substance solutions are generally inconvenient, and rapid mixing of nutrient substances of all components is difficult are solved. According to the technical scheme, the selenium-rich liquid water-soluble fertilizer preparation equipment comprises a supporting assembly; the device further comprises a bearing assembly, a water pumping assembly, a stirring assembly, a quantifying assembly and a material injection assembly. Solution is poured into the threaded cylinder, the floating body is placed in the threaded cylinder, the floating body can float on the solution, the limiting frame can move along the outer wall of the scale plate along with continuous filling of the solution into the threaded cylinder, the height of the solution can be quickly read, and the volume of the solution can be conveniently determined. And the stirring structure and the circulating water flow are arranged, so that the stirring effect of the mixed liquid can be accelerated, and the technical problem is solved.
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Description

Technical Field

[0001] The utility model belongs to the field of water-soluble fertilizer preparation equipment, and in particular relates to selenium-rich liquid water-soluble fertilizer preparation equipment. Background Art

[0002] Selenium-rich liquid water-soluble fertilizer is a new type of plant nutrient fertilizer with the advantages of high efficiency, safety, and environmental protection. It is widely used in modern agricultural production. At present, various selenium elements and other nutrients are usually dissolved in water to prepare selenium-rich fertilizer solutions for crop fertilization. In order to solve the problems in the traditional selenium preparation process, mixing equipment is usually used to dissolve selenium and other nutrients in water, and maintain the stability and uniformity of the fertilizer solution. However, the water-soluble fertilizer preparation equipment in the prior art is usually not convenient for rapid quantitative feeding and stirring of various nutrient solutions during use, and it is difficult to quickly mix the nutrients of each component, which needs further improvement. Utility Model Content

[0003] In order to overcome the problem that the water-soluble fertilizer preparation equipment in the prior art is usually inconvenient to quickly and quantitatively feed and stir various nutrient solutions when in use, and it is difficult to quickly mix the nutrients of various components.

[0004] The technical solution of the utility model is: a selenium-rich liquid water-soluble fertilizer preparation equipment, including a supporting component; also including a containing component, a pumping component, a stirring component, a quantitative component and an injection component; the upper end of the supporting component is provided with a containing component for storing the solution; the right end of the supporting component is provided with a pumping component for pumping water; the upper end of the containing component is provided with a stirring component for stirring; the stirring component is provided with a quantitative component for quantitatively measuring the solution; the containing component is provided with an injection component for injecting water.

[0005] Preferably, the stirring component is placed on the containing component, and the volume of the solution can be quickly measured using the quantitative component. After the measurement is completed, the quantitative component is opened and installed on the stirring component, and the solution in the quantitative component will slowly drip into the containing component. An appropriate amount of aqueous solution is added to the containing component through the injection component, and then the stirring component is turned on to stir the solution in the containing component. At the same time, the pumping component is turned on to extract the mixed liquid in the containing component and then inject it into the containing component, which can improve the mixing effect of multiple solutions and solves the problem that the water-soluble fertilizer preparation equipment in the prior art is usually not convenient for quickly quantitatively feeding and stirring various nutrient solutions when in use, and it is difficult to quickly mix the nutrients of each component.

[0006] Preferably, the support assembly includes a support box, support legs, a liquid outlet pipe and a solenoid valve; the support legs are fixedly connected to the four corner edges of the lower end of the support box; the liquid outlet pipe is fixedly connected to the center of the upper and lower ends of the support box; a solenoid valve is fixedly provided on the liquid outlet pipe, and the mixed liquid in the containing assembly can be quickly released by opening the solenoid valve.

[0007] Preferably, the containing assembly includes a fixed cylinder and a first fixed ring; the fixed cylinder is fixedly connected to the inner wall of the lower end of the supporting box; the first fixed ring is fixedly connected to the inner wall of the fixed cylinder; the interior of the fixed cylinder and the interior of the liquid outlet pipe are interconnected, and the mixed liquid in the fixed cylinder can flow downward through the liquid outlet pipe.

[0008] Preferably, the pumping assembly includes a supporting plate, a water pump, a pumping pipe, a water outlet pipe, a first fixed pipe and a second fixed pipe; the right end of the supporting box is fixedly connected to the supporting plate; the upper end of the supporting plate is fixedly connected to the water pump; the pumping pipe is fixedly connected to the liquid extraction port of the water pump; the front end of the fixed cylinder is fixedly connected to the first fixed pipe in a through-type manner; the rear end of the fixed cylinder is fixedly connected to the second fixed pipe in a through-type manner; the front end of the first fixed pipe penetrates the front end of the supporting box and extends to the outside of the supporting box; the rear end of the second fixed pipe penetrates the rear end of the supporting box and extends to the outside of the supporting box; the other end of the pumping pipe is fixedly connected to the inner wall of the first fixed pipe; the water outlet pipe is fixedly connected to the liquid outlet port of the water pump; the other end of the water outlet pipe is threadedly installed on the inner wall of the second fixed pipe. When the water pump is turned on, the mixed liquid in the fixed cylinder can be extracted through the pumping pipe and then injected back into the fixed cylinder through the second fixed pipe. When the mixed liquid circulates, the extracted mixed liquid will flow back and impact the mixed liquid in the fixed cylinder, thereby improving the mixing effect of the mixed liquid.

[0009] Preferably, the stirring assembly includes a mounting body, a motor, a rotating column, a second fixed ring, a stirring block and a screw groove; the mounting body is movably arranged on the upper end of the fixed cylinder; the motor is fixedly connected to the center of the upper end of the mounting body; the lower end of the output shaft of the motor passes through the mounting body and is fixedly connected to the rotating column; the lower part of the outer wall of the rotating column is fixedly connected to the second fixed ring; the outer wall of the second fixed ring is fixedly connected to evenly distributed stirring blocks; the stirring blocks are located in the internal area of ​​the first fixed ring; screw grooves evenly distributed about the center of the mounting body are penetrated through the upper and lower ends of the mounting body, and the motor is turned on to rotate the rotating column, and the rotating column drives the second fixed ring to rotate, and the second fixed ring drives the stirring block to rotate, so that the mixed liquid in the fixed cylinder can be stirred.

[0010] Preferably, the quantitative component includes a threaded barrel, a water outlet funnel, a third fixed ring, a scale plate, a float, a fixed plate, a limit frame and a threaded column; the inner wall of the screw groove is threadedly installed with a threaded barrel; the lower end of the threaded barrel is fixedly connected with a water outlet funnel; the inner wall of the lower end of the water outlet funnel is threadedly installed with a threaded column; the upper part of the outer wall of the threaded barrel is threadedly installed with a third fixed ring; the upper end of the third fixed ring is fixedly connected with a scale plate; a float is movably arranged inside the threaded barrel; the upper end of the float is fixedly connected with a fixed plate; one end of the fixed plate close to the scale plate is fixedly connected with the limit frame; the inner wall of the limit frame is fitted with the outer wall of the scale plate, and the solution is poured into the bottle. Insert the threaded barrel and place the float inside the threaded barrel. The float will float on the solution. As the solution is continuously added to the threaded barrel, the limit frame will move along the outer wall of the scale plate, so that the height of the solution can be quickly read, which is convenient for determining the volume of the solution. When the required volume is reached, place the threaded barrel directly above the screw groove, and then manually take out the threaded column. At this time, the solution in the threaded barrel will fall into the fixed barrel through the water outlet funnel and the screw groove, and then the threaded barrel can be installed on the inner wall of the screw groove. The volume of the solution can be quickly determined, realizing the ability of the device to quickly and quantitatively feed.

[0011] Preferably, the injection assembly includes a injection tube, an injection tank and a cover body; the injection tube is fixedly connected to the inner and outer walls of the fixed cylinder in a through-type manner; the upper end of the injection tube is fixedly connected to the injection tank; the interior of the injection tank and the interior of the injection tube are interconnected; the cover body is threadedly installed on the inner wall of the upper end of the injection tank, and after the cover body is removed from the upper end of the injection tank, liquid can be quickly injected into the interior of the fixed cylinder through the injection tank.

[0012] Beneficial effects of the utility model:

[0013] 1. By pouring the solution into the threaded barrel and placing the float inside the threaded barrel, the float will float on the solution. As the solution is continuously added to the threaded barrel, the limit frame will move along the outer wall of the scale plate, and the height of the solution can be quickly read, which is convenient for determining the volume of the solution. When the required volume is reached, the threaded barrel is placed directly above the screw groove, and then the threaded column is manually taken out. At this time, the solution in the threaded barrel will fall into the fixed barrel through the water outlet funnel and the screw groove, and then the threaded barrel can be installed on the inner wall of the screw groove. The volume of the solution can be quickly determined, and the ability of the device to quickly and quantitatively feed is realized, which solves the problem that the water-soluble fertilizer preparation equipment in the prior art is usually inconvenient for quickly and quantitatively feeding various nutrient solutions when in use;

[0014] 2. By turning on the water pump, the mixed liquid in the fixed cylinder can be pumped out through the water pumping pipe, and then injected back into the fixed cylinder through the second fixed pipe. When the mixed liquid circulates, the pumped mixed liquid will flow back and impact the mixed liquid in the fixed cylinder, thereby improving the mixing effect of the mixed liquid. The motor is turned on to rotate the rotating column, and the rotating column drives the second fixed ring to rotate, and the second fixed ring drives the stirring block to rotate, so that the mixed liquid in the fixed cylinder can be stirred, which solves the problem that the water-soluble fertilizer preparation equipment in the prior art is usually inconvenient to quickly feed and stir various nutrient solutions and difficult to quickly mix the nutrients of each component when in use;

[0015] 3. After the cover is removed from the upper end of the injection tank, liquid can be quickly injected into the interior of the fixed cylinder through the injection tank, and the installation body is placed at the upper end of the fixed cylinder, which is convenient for rapid disassembly and assembly of the installation body, thereby facilitating rapid maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a selenium-rich liquid water-soluble fertilizer preparation device of the utility model;

[0017] Figure 2 What is shown is a schematic diagram of the oblique cross-section of the three-dimensional structure of a support assembly of a selenium-rich liquid water-soluble fertilizer preparation device of the utility model;

[0018] Figure 3 The three-dimensional structure diagram of the holding component and the injection component of the selenium-rich liquid water-soluble fertilizer preparation equipment of the utility model is shown;

[0019] Figure 4 What is shown is a three-dimensional structural schematic diagram of a water pumping component of a selenium-rich liquid water-soluble fertilizer preparation device of the utility model;

[0020] Figure 5 The three-dimensional structure schematic diagram of the stirring assembly of a selenium-rich liquid water-soluble fertilizer preparation device of the utility model is shown;

[0021] Figure 6 What is shown is a three-dimensional disassembled structural schematic diagram of a quantitative component of a selenium-rich liquid water-soluble fertilizer preparation device of the utility model.

[0022] The markings in the accompanying drawings are: 1-support assembly, 101-support box, 102-support leg, 103-liquid outlet pipe, 104-solenoid valve, 2-carrying assembly, 201-fixed cylinder, 202-first fixed ring, 3-pumping assembly, 301-carrying plate, 302-water pump, 303-pumping pipe, 304-water outlet pipe, 305-first fixed pipe, 306-second fixed pipe, 4-stirring assembly, 401-installation body , 402-motor, 403-rotating column, 404-second fixed ring, 405-stirring block, 406-screw groove, 5-quantitative assembly, 501-threaded barrel, 502-water outlet funnel, 503-third fixed ring, 504-scale plate, 505-floating body, 506-fixed plate, 507-limiting frame, 508-threaded column, 6-injection assembly, 601-injection tube, 602-injection tank, 603-cover body. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1 The utility model provides an embodiment: a selenium-rich liquid water-soluble fertilizer preparation device, including a supporting component 1; also including a containing component 2, a pumping component 3, a stirring component 4, a quantitative component 5 and an injection component 6; the upper end of the supporting component 1 is provided with a containing component 2 for storing a solution; the right end of the supporting component 1 is provided with a pumping component 3 for pumping water; the upper end of the containing component 2 is provided with a stirring component 4 for stirring; the stirring component 4 is provided with a quantitative component 5 for quantitatively measuring the solution; the containing component 2 is provided with an injection component 6 for injecting water.

[0025] See also Figure 2 In this embodiment, the support assembly 1 includes a support box 101, support legs 102, a liquid outlet pipe 103 and a solenoid valve 104; the support legs 102 are fixedly connected to the four corner edges of the lower end of the support box 101; the liquid outlet pipe 103 is fixedly connected to the center of the upper and lower ends of the support box 101 in a through-type manner; and the solenoid valve 104 is fixedly arranged on the liquid outlet pipe 103.

[0026] See also Figure 3 In this embodiment, the containing assembly 2 includes a fixed cylinder 201 and a first fixed ring 202; the fixed cylinder 201 is fixedly connected to the inner wall of the lower end of the supporting box 101; the first fixed ring 202 is fixedly connected to the inner wall of the fixed cylinder 201; the interior of the fixed cylinder 201 and the interior of the liquid outlet pipe 103 are interconnected.

[0027] See also Figure 4In this embodiment, the pumping assembly 3 includes a bearing plate 301, a water pump 302, a water pumping pipe 303, a water outlet pipe 304, a first fixed pipe 305 and a second fixed pipe 306; the right end of the support box 101 is fixedly connected to the bearing plate 301; the upper end of the bearing plate 301 is fixedly connected to the water pump 302; the pumping pipe 303 is fixedly connected to the pumping port of the water pump 302; the front end of the fixed cylinder 201 is fixedly connected to the first fixed pipe 305; the rear end of the fixed cylinder 201 is fixedly connected to the first fixed pipe 305; A second fixed pipe 306 is fixedly connected; the front end of the first fixed pipe 305 passes through the front end of the support box 101 and extends to the outside of the support box 101; the rear end of the second fixed pipe 306 passes through the rear end of the support box 101 and extends to the outside of the support box 101; the other end of the water suction pipe 303 is fixedly connected to the inner wall of the first fixed pipe 305; the liquid outlet port of the water pump 302 is fixedly connected to the water outlet pipe 304; the other end of the water outlet pipe 304 is threadedly installed on the inner wall of the second fixed pipe 306.

[0028] See also Figure 5 In this embodiment, the stirring assembly 4 includes a mounting body 401, a motor 402, a rotating column 403, a second fixed ring 404, a stirring block 405 and a screw groove 406; the mounting body 401 is movably provided at the upper end of the fixed cylinder 201; the motor 402 is fixedly connected to the center of the upper end of the mounting body 401; the lower end of the output shaft of the motor 402 passes through the mounting body 401 and is fixedly connected to the rotating column 403; the lower part of the outer wall of the rotating column 403 is fixedly connected to the second fixed ring 404; the outer wall of the second fixed ring 404 is fixedly connected to the stirring blocks 405 evenly distributed; the stirring blocks 405 are located in the inner area of ​​the first fixed ring 202; the upper and lower ends of the mounting body 401 are penetrated by screw grooves 406 evenly distributed about the center of the mounting body 401.

[0029] See also Figure 6 In this embodiment, the quantitative component 5 includes a threaded barrel 501, a water outlet funnel 502, a third fixed ring 503, a scale plate 504, a float 505, a fixed plate 506, a limit frame 507 and a threaded column 508; the inner wall of the screw groove 406 is threadedly installed with the threaded barrel 501; the lower end of the threaded barrel 501 is fixedly connected to the water outlet funnel 502; the lower end of the inner wall of the water outlet funnel 502 is threadedly installed with a threaded column 508; the upper part of the outer wall of the threaded barrel 501 is threadedly installed with the third fixed ring 503; the upper end of the third fixed ring 503 is fixedly connected to the scale plate 504; the float 505 is movably arranged inside the threaded barrel 501; the upper end of the float 505 is fixedly connected to the fixed plate 506; one end of the fixed plate 506 close to the scale plate 504 is fixedly connected to the limit frame 507; the inner wall of the limit frame 507 is in contact with the outer wall of the scale plate 504.

[0030] See also Figure 3In this embodiment, the injection assembly 6 includes an injection tube 601, an injection tank 602 and a cover body 603; the injection tube 601 is fixedly connected to the inner and outer walls of the fixed cylinder 201 in a through-type manner; the upper end of the injection tube 601 is fixedly connected to the injection tank 602; the interior of the injection tank 602 and the interior of the injection tube 601 are interconnected; the cover body 603 is threadedly installed on the inner wall of the upper end of the injection tank 602.

[0031] When working, first, place the mounting body 401 on the upper end of the fixed cylinder 201, then pour the solution into the threaded cylinder 501, and place the float 505 inside the threaded cylinder 501. The float 505 will float on the solution. As the solution is continuously added to the threaded cylinder 501, the limit frame 507 will move along the outer wall of the scale plate 504, so that the height of the solution can be quickly read, and the volume of the solution can be conveniently determined. When the required volume is reached, the threaded cylinder 501 is placed just above the screw groove 406, and then the threaded column 508 is manually taken out. At this time, the solution in the threaded cylinder 501 will fall into the fixed cylinder 201 through the water outlet funnel 502 and the screw groove 406, and then the threaded cylinder 501 can be threadedly installed on the inner wall of the screw groove 406, so that the volume of the solution can be quickly determined.

[0032] Next, the cover 603 is removed from the upper end of the injection tank 602, and liquid is quickly injected into the interior of the fixed cylinder 201 through the injection tank 602;

[0033] Then, the water pump 302 is turned on to extract the mixed liquid in the fixed cylinder 201 through the water extraction pipe 303, and then injected back into the fixed cylinder 201 through the second fixed pipe 306. When the mixed liquid circulates, the extracted mixed liquid will flow back and impact the mixed liquid in the fixed cylinder 201, thereby improving the mixing effect of the mixed liquid.

[0034] At the same time, the motor 402 is turned on to rotate the rotating column 403, which drives the second fixed ring 404 to rotate, and the second fixed ring 404 drives the stirring block 405 to rotate, so that the mixed liquid in the fixed cylinder 201 can be stirred. Finally, the mixed liquid in the fixed cylinder 201 can be quickly released by opening the solenoid valve 104.

[0035] Through the above steps, the stirring component 4 is placed on the containing component 2, and the volume of the solution can be quickly measured using the quantitative component 5. After the measurement is completed, the quantitative component 5 is opened and installed on the stirring component 4, and the solution in the quantitative component 5 will slowly drip into the containing component 2. An appropriate amount of aqueous solution is added to the containing component 2 through the injection component 6, and then the stirring component 4 is turned on to stir the solution in the containing component 2. At the same time, the pumping component 3 is turned on to extract the mixed liquid in the containing component 2 and then inject it into the containing component 2, which can improve the mixing effect of multiple solutions and solve the problem that the water-soluble fertilizer preparation equipment in the prior art is usually not convenient for quickly quantitatively feeding and stirring various nutrient solutions when in use, and it is difficult to quickly mix the nutrients of each component.

[0036] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A selenium-rich liquid water-soluble fertilizer preparation device, comprising a support assembly (1); characterized in that: The invention also comprises a containing component (2), a pumping component (3), a stirring component (4), a quantitative component (5) and an injection component (6); the upper end of the supporting component (1) is provided with a containing component (2) for storing a solution; the right end of the supporting component (1) is provided with a pumping component (3) for pumping water; the upper end of the containing component (2) is provided with a stirring component (4) for stirring; the stirring component (4) is provided with a quantitative component (5) for quantitatively measuring the solution; and the containing component (2) is provided with an injection component (6) for injecting water.

2. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 1, characterized in that: The support assembly (1) comprises a support box (101), support legs (102), a liquid outlet pipe (103) and a solenoid valve (104); the support legs (102) are fixedly connected to the four corner edges of the lower end of the support box (101); the liquid outlet pipe (103) is fixedly connected to the center of the upper and lower ends of the support box (101); and the solenoid valve (104) is fixedly arranged on the liquid outlet pipe (103).

3. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 2, characterized in that: The receiving assembly (2) comprises a fixing cylinder (201) and a first fixing ring (202); the fixing cylinder (201) is fixedly connected to the inner wall of the lower end of the supporting box (101); the first fixing ring (202) is fixedly connected to the inner wall of the fixing cylinder (201); The interior of the fixed cylinder (201) and the interior of the liquid outlet pipe (103) are interconnected.

4. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 3, characterized in that: The water pumping assembly (3) comprises a bearing plate (301), a water pump (302), a water pumping pipe (303), a water outlet pipe (304), a first fixed pipe (305) and a second fixed pipe (306); the right end of the support box (101) is fixedly connected to the bearing plate (301); the upper end of the bearing plate (301) is fixedly connected to the water pump (302); the water pumping pipe (303) is fixedly connected to the liquid pumping port of the water pump (302); the front end of the fixed cylinder (201) is fixedly connected to the first fixed pipe (305); the rear end of the fixed cylinder (201) is fixedly connected to the A second fixed pipe (306) is connected; the front end of the first fixed pipe (305) passes through the front end of the support box (101) and extends to the outside of the support box (101); the rear end of the second fixed pipe (306) passes through the rear end of the support box (101) and extends to the outside of the support box (101); the other end of the water pump (303) is fixedly connected to the inner wall of the first fixed pipe (305); the liquid outlet port of the water pump (302) is fixedly connected to the water outlet pipe (304); the other end of the water outlet pipe (304) is threadedly installed on the inner wall of the second fixed pipe (306).

5. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 3, characterized in that: The stirring assembly (4) comprises a mounting body (401), a motor (402), a rotating column (403), a second fixed ring (404), a stirring block (405) and a screw groove (406); the mounting body (401) is movably arranged at the upper end of the fixed cylinder (201); the motor (402) is fixedly connected to the center of the upper end of the mounting body (401); the lower end of the output shaft of the motor (402) passes through the mounting body (401) and is fixedly connected to the rotating column (403); the lower part of the outer wall of the rotating column (403) is fixedly connected to the second fixed ring (404); the outer wall of the second fixed ring (404) is fixedly connected to the stirring blocks (405) evenly distributed; the stirring blocks (405) are located in the inner area of ​​the first fixed ring (202); and screw grooves (406) evenly distributed about the center of the mounting body (401) are opened through the upper and lower ends of the mounting body (401).

6. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 5, characterized in that: The quantitative component (5) comprises a threaded barrel (501), a water outlet funnel (502), a third fixing ring (503), a scale plate (504), a float (505), a fixing plate (506), a limit frame (507) and a threaded column (508); the threaded barrel (501) is threadedly mounted on the inner wall of the screw groove (406); the water outlet funnel (502) is fixedly connected to the lower end of the threaded barrel (501); the threaded column (508) is threadedly mounted on the inner wall of the lower end of the water outlet funnel (502) A third fixing ring (503) is threadedly installed on the upper part of the outer wall of the threaded barrel (501); a scale plate (504) is fixedly connected to the upper end of the third fixing ring (503); a floating body (505) is movably arranged inside the threaded barrel (501); a fixing plate (506) is fixedly connected to the upper end of the floating body (505); an end of the fixing plate (506) close to the scale plate (504) is fixedly connected to a limit frame (507); the inner wall of the limit frame (507) is in contact with the outer wall of the scale plate (504).

7. A selenium-rich liquid water-soluble fertilizer preparation device according to claim 3, characterized in that: The injection assembly (6) comprises an injection pipe (601), an injection tank (602) and a cover body (603); the injection pipe (601) is fixedly connected to the inner and outer walls of the fixed cylinder (201); the upper end of the injection pipe (601) is fixedly connected to the injection tank (602); the interior of the injection tank (602) and the interior of the injection pipe (601) are interconnected; and the cover body (603) is threadedly mounted on the inner wall of the upper end of the injection tank (602).