Compound fertilizer raw material weighing device with automatic feeding function

Abstract

The invention relates to the field of fertilizer weighing, in particular to an automatic-feeding compound fertilizer raw material weighing device which comprises a stirring box, a feeding cylinder is fixedly arranged at the upper end of the stirring box, a plurality of mounting holes are uniformly formed in the upper end of the feeding cylinder in a penetrating mode in the circumferential direction, and a weighing cylinder is vertically and movably mounted in each mounting hole; the bottom of each mounting hole extends downwards to be provided with a mounting frame, a reset spring is arranged between the bottom of the weighing cylinder and the mounting frame, a discharging pipe is fixedly arranged at the bottom of the weighing cylinder, the bottom of an inner cavity of the weighing cylinder is communicated with the discharging pipe through a discharging hole, an ejector rod is coaxially arranged in the discharging pipe, and a baffle is fixedly connected to the bottom end of the ejector rod. The top end of the ejector rod is fixedly connected with a plug used for sealing the discharging hole, and a weighing sensor is fixedly arranged at the bottom of the weighing cylinder. According to the invention, basic fertilizers with different weights can be simultaneously weighed according to the formula requirements of the compound fertilizer, and automatic feeding and stirring processes can be sequentially carried out according to the contents of different raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer weighing, and particularly to a weighing device for compound fertilizer raw materials with automatic feeding. Background Art

[0002] Compound fertilizer is a kind of fertilizer widely used in agricultural production, which is made by chemical synthesis or mixing process and contains two or three of the three main nutrient elements of nitrogen, phosphorus and potassium. Compound fertilizer is widely used in the agricultural field, mainly used to provide various nutrients required for plant growth. It is suitable for field crops, cash crops and fruit and vegetable planting, can increase yield, improve quality, and meet the needs of crops in different growth periods.

[0003] During the granulation preparation process of compound fertilizer, it is necessary to weigh various basic fertilizers with different weights according to the requirements of the formula process for mixing. The current weighing devices cannot separately weigh raw materials of different components at the same time, and they all first use weighing equipment for weighing, and then transfer the raw materials to the mixing equipment for mixing, with low efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a weighing device for compound fertilizer raw materials with automatic feeding, aiming to solve the above technical problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A weighing device for compound fertilizer raw materials with automatic feeding, including a stirring tank, an upper feeding cylinder is fixedly arranged at the upper end of the stirring tank, a number of mounting holes are evenly arranged in the circumferential direction through the upper end of the upper feeding cylinder, a weighing cylinder is installed up and down in each mounting hole, an installation frame extends downward from the bottom of each mounting hole, a return spring is arranged between the bottom of the weighing cylinder and the installation frame, a discharge pipe is fixedly arranged at the bottom of the weighing cylinder, the inner cavity bottom of the weighing cylinder is communicated with the discharge pipe through a discharge hole, a push rod is coaxially arranged inside the discharge pipe, a baffle is fixedly connected to the bottom end of the push rod, a plug for sealing the discharge hole is fixedly connected to the top end of the push rod, a first support is fixedly arranged on the inner wall of the discharge pipe, a return spring is arranged between the bottom of the plug and the first support, and a weighing sensor is fixedly arranged at the bottom of the weighing cylinder.

[0007] A servo motor is fixedly arranged at the center of the upper end of the upper feeding cylinder, the output end of the servo motor is fixedly connected with a central shaft, a threaded part is arranged on the central shaft, a lifting plate is arranged through the threaded part, a screw sleeve is fixedly arranged at the center of the lifting plate, the threaded part is in threaded through cooperation with the screw sleeve, a pressing plate corresponding to the baffle is fixedly connected to the outer wall of the lifting plate through a connecting rod, the push rod slides through the corresponding pressing plate, and the pressing plate is located above the corresponding baffle.

[0008] As a further solution of the present invention: a clearance hole is provided through the bottom of the mounting frame, the discharge pipe is slidably installed in the clearance hole, limiting straight grooves are provided through both sides of the mounting frame, limiting blocks are extended on both sides of the weighing cylinder, and the limiting blocks are adapted to be slidably installed in the limiting straight grooves.

[0009] As a further solution of the present invention: a sloped platform is arranged at the top end of the plug, a sloped surface is arranged at the bottom end of the discharge hole, and the plug rests on the sloped surface at the bottom end of the discharge hole through the sloped platform.

[0010] As a further solution of the present invention: the diameter of the discharge hole is smaller than the diameter of the plug, and the diameter of the plug is smaller than the inner diameter of the discharge pipe.

[0011] As a further solution of the present invention: the weighing cylinder protrudes upward in the mounting hole, and the distance between the top of the weighing cylinder and the top of the loading cylinder is greater than the distance between the bottom of the weighing cylinder and the mounting frame, and the distance between the bottom of the weighing cylinder and the mounting frame is greater than the distance between the bottom of the discharge pipe and the pressure plate.

[0012] As a further solution of the present invention: blocking parts are arranged at both ends of the threaded part, and the length of the threaded part is greater than the sum of the distances between the bottom end of the weighing cylinder and the mounting frame and between the bottom end of the plug and the first bracket.

[0013] As a further solution of the present invention: a conical slide is arranged at the bottom of the inner cavity of the feeding barrel, a feeding hole is arranged through the bottom of the conical slide, the feeding hole is connected with the mixing box, a second bracket is fixedly arranged at the upper end of the feeding hole, and the bottom of the central axis is rotatably installed in the second bracket.

[0014] As a further solution of the present invention: a rotating frame is fixedly connected to the outer wall of the central axis, and a plurality of scraping strips are evenly fixedly connected to the outer circumference of the rotating frame. The scraping strips are inclined and abut against the surface of the conical slide.

[0015] As a further solution of the present invention: a stirring shaft is rotatably installed at the bottom of the stirring box, stirring rods are evenly connected to the outer wall of the stirring shaft, and the bottom of the central shaft is connected to the top of the stirring shaft through a coupling.

[0016] Beneficial effects of the present invention:

[0017] (1) By setting up weighing cylinders, when weighing the raw materials of compound fertilizers, different types of basic fertilizers are respectively put into different weighing cylinders. Since the weighing cylinders are connected to the mounting frame through return springs, the weighing cylinders have a certain up-and-down floating space within the mounting frame. In the initial state, the horizontal heights of all weighings are kept consistent, and at the same time, the weighing sensors are zeroed to ensure the consistency and accuracy of the weighing process. After adding the raw materials, the pressure signals generated by the raw materials in the weighing cylinders are collected by the weighing sensors, so that different weights of basic fertilizers can be weighed simultaneously according to the formula requirements of the compound fertilizer.

[0018] (2) By setting up a lifting plate and a pressing plate, during weighing, the weighing cylinder will squeeze the return spring downward under the action of gravity, and drive the discharge pipe and the ejector rod to move downward synchronously. During this process, the plug will tightly abut against the discharge hole under the action of the return spring, effectively preventing raw material leakage. During stirring and feeding, the servo motor drives the central shaft to rotate. Using the thread fit between the threaded part and the nut, the lifting plate moves downward along the central shaft until the pressing plate presses against the highest baffle and drives the ejector rod to move downward, causing the plug to disengage from the discharge hole. At this time, the raw material with the least content and the lightest weight in the weighing cylinder will first fall into the mixing tank through the discharge pipe. As the lifting plate continues to move downward, the pressing plate will press on different baffles in order from high to low, causing the raw materials in different weighing cylinders to be discharged in order of increasing content, so that the automatic feeding process can be carried out according to the different raw material contents from low to high.

[0019] (3) During the feeding process, the raw material with the least content will fall to the bottom of the mixing tank. By analogy, the raw material with the most content will finally fall to the top. When stirring, the raw material with a higher content will continuously leak downward under its own gravity, so that it can be fully stirred with the raw materials of other components, effectively avoiding the problem that the raw material with a higher content accumulates at the bottom, which is conducive to the full mixing of different raw materials of the compound fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is the overall structural schematic diagram of the present invention.

[0022] Figure 2 is the internal structural schematic diagram of the present invention.

[0023] Figure 3 is the structural schematic diagram of the feeding cylinder of the present invention.

[0024] Figure 4 is the installation schematic diagram of the weighing cylinder of the present invention.

[0025] Figure 5It is a schematic diagram of the internal structure of the weighing cylinder in the present invention.

[0026] Figure 6 is Figure 5 an enlarged schematic diagram of part A in

[0027] Figure 7 It is a schematic diagram of the structure of the central shaft in the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the lifting plate in the present invention.

[0029] In the figure: 1, mixing tank; 2, feeding cylinder; 201, mounting hole; 202, conical sliding table; 203, feeding hole; 204, second bracket; 3, weighing cylinder; 301, return spring; 302, limit block; 303, discharge pipe; 3031, first bracket; 304, ejector rod; 3041, baffle; 3042, plug; 3043, return spring; 305, weighing sensor; 306, discharge hole; 4, servo motor; 5, mounting frame; 501, relief hole; 502, limit straight groove; 6, central shaft; 601, rotating frame; 602, scraping strip; 603, coupling; 604, threaded part; 7, mixing shaft; 701, mixing rod; 8, lifting plate; 801, screw sleeve; 802, connecting rod; 803, pressing plate. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] Please refer to Figures 1-6As shown in the figure, the present invention is a weighing device for compound fertilizer raw materials with automatic feeding, including a mixing tank 1. A feeding cylinder 2 is fixedly arranged at the upper end of the mixing tank 1. A plurality of mounting holes 201 are evenly arranged in the circumferential direction through the upper end of the feeding cylinder 2. A weighing cylinder 3 is movably installed up and down in each mounting hole 201. An installation frame 5 extends downward from the bottom of each mounting hole 201. A return spring 301 is arranged between the bottom of the weighing cylinder 3 and the installation frame 5. A discharge pipe 303 is fixedly arranged at the bottom of the weighing cylinder 3. The inner cavity bottom of the weighing cylinder 3 is communicated with the discharge pipe 303 through a discharge hole 306. A push rod 304 is coaxially arranged inside the discharge pipe 303. A baffle 3041 is fixedly connected to the bottom end of the push rod 304. A plug 3042 for sealing the discharge hole 306 is fixedly connected to the top end of the push rod 304. A first support 3031 is fixedly arranged on the inner wall of the discharge pipe 303. A return spring 3043 is arranged between the bottom of the plug 3042 and the first support 3031. A weighing sensor 305 is fixedly arranged at the bottom of the weighing cylinder 3.

[0032] Specifically, by setting the weighing cylinder 3, when weighing the compound fertilizer raw materials, different types of basic fertilizers, such as urea, ammonium phosphate, potassium chloride, etc., are respectively put into different weighing cylinders 3. Since the weighing cylinder 3 is connected to the installation frame 5 through the return spring 301, the weighing cylinder 3 has a certain up and down floating space in the installation frame 5. In the initial state, the horizontal heights of all weighing cylinders 3 are kept consistent, and at the same time, the weighing sensor 305 is zeroed to ensure the consistency and accuracy of the weighing process. After adding the raw materials, the weighing sensor 305 is used to collect the pressure signal generated by the raw materials in the weighing cylinder 3, so that different weights of basic fertilizers can be weighed according to the formula requirements of the compound fertilizer.

[0033] Such as Figure 7 and Figure 8 As shown in the figure, a servo motor 4 is fixedly arranged at the center of the upper end of the feeding cylinder 2. The output end of the servo motor 4 is fixedly connected to a central shaft 6. A threaded part 604 is arranged on the central shaft 6. A lifting plate 8 is arranged through the threaded part 604. A screw sleeve 801 is fixedly arranged at the center of the lifting plate 8. The threaded part 604 is in threaded through cooperation with the screw sleeve 801. A pressing plate 803 corresponding to the baffle 3041 is fixedly connected to the outer wall of the lifting plate 8 through a connecting rod 802. The push rod 304 slides through the corresponding pressing plate 803, and the pressing plate 803 is located above the corresponding baffle 3041.

[0034] Specifically, by setting the lifting plate 8 and the pressing plate 803, when weighing, the weighing cylinder 3 will press the return spring 301 downward under the action of gravity, and drive the discharge pipe 303 and the push rod 304 to move downward synchronously. In this process, the plug 3042 will be tightly pressed against the discharge hole 306 under the action of the return spring 3043, effectively avoiding the leakage of raw materials. Since the content of different components of raw materials in compound fertilizer is different, their weight is also different, so the distances moved downward by different weighing cylinders 3 are also different. The higher the content of the raw material, the heavier it will be, and the farther the weighing cylinder 3 moves downward, so that the corresponding baffles 3041 of different components of raw materials are at different heights. During stirring and feeding, the servo motor 4 drives the central shaft 6 to rotate, and the threaded portion 604 cooperates with the thread of the screw sleeve 801 to make the lifting plate 8 move downward along the central shaft 6 until the pressing plate 803 presses against the highest baffle 3041 and drives the top rod 304 to move downward, so that the plug 3042 is disengaged from the discharge hole 306. At this time, the raw material with the least content and the lightest weight in the weighing cylinder 3 will first fall into the mixing box 1 through the discharge pipe 303. As the lifting plate 8 continues to move downward, the pressing plate 803 will be pressed on different baffles 3041 in order from high to low, so that the raw materials in different weighing cylinders 3 are discharged in order from small to large content, so that the automatic feeding process can be carried out in sequence according to the content of different raw materials.

[0035] More specifically, during the feeding process, the raw material with the least content will fall to the bottom of the mixing box 1, and by analogy, the raw material with the most content will finally fall to the top. When stirring, the raw material with a higher content will continue to seep downward under its own gravity, so that it can be fully stirred with the raw materials of other components, effectively avoiding the problem of raw materials with a higher content accumulating at the bottom, which is conducive to the full mixing of different raw materials of the compound fertilizer.

[0036] like Figure 3 and Figure 4 As shown, a clearance hole 501 is provided through the bottom of the mounting frame 5, and the discharge pipe 303 is slidably installed in the clearance hole 501, and limiting straight grooves 502 are provided through both sides of the mounting frame 5, and limiting blocks 302 are extended on both sides of the weighing cylinder 3, and the limiting blocks 302 are adapted to be slidably installed in the limiting straight grooves 502.

[0037] Specifically, when the weighing cylinder 3 moves in the mounting frame 5, the discharge pipe 303 will pass through the clearance hole 501, ensuring that the discharge pipe 303 can move down synchronously with the weighing cylinder 3. During the lifting and lowering process of the weighing cylinder 3, the limit block 302 always remains in the limit straight groove 502 to slide up and down, thereby improving the stability of the weighing cylinder 3 during movement and preventing the weighing cylinder 3 from shaking horizontally.

[0038] like Figure 6As shown, the top of the plug 3042 is provided with an inclined platform, and the bottom end of the discharge hole 306 is provided with an inclined surface. The plug 3042 abuts against the inclined surface at the bottom end of the discharge hole 306 through the inclined platform.

[0039] Furthermore, the aperture of the discharge hole 306 is smaller than the diameter of the plug 3042, and the diameter of the plug 3042 is smaller than the inner diameter of the discharge pipe 303.

[0040] Specifically, the structure of the inclined platform and the inclined surface can greatly improve the tightness when the plug 3042 is sealed; the diameter of the plug 3042 is larger than the diameter of the discharge hole 306, which enables the plug 3042 to completely block the discharge hole 306 and prevent the leakage of raw materials; during feeding, the plug 3042 moves downward and disengages from the discharge hole 306. At this time, the raw materials will enter the discharge pipe 303 from the discharge hole 306. The diameter of the plug 3042 being smaller than the inner diameter of the discharge pipe 303 can prevent the plug 3042 from blocking the discharge pipe 303 and ensure the smooth fall of the raw materials.

[0041] As Figure 2 shown, the weighing cylinder 3 protrudes upwardly in the mounting hole 201, and the distance between the top end of the weighing cylinder 3 and the top end of the feeding cylinder 2 is greater than the distance between the bottom end of the weighing cylinder 3 and the mounting bracket 5, and the distance between the bottom end of the weighing cylinder 3 and the mounting bracket 5 is greater than the distance between the bottom end of the discharge pipe 303 and the pressing plate 803.

[0042] Specifically, since the distance between the top end of the weighing cylinder 3 and the top end of the feeding cylinder 2 is greater than the distance between the bottom end of the weighing cylinder 3 and the mounting bracket 5, when the weighing cylinder 3 descends to the limit position, its top end will not be blocked and limited by the feeding cylinder 2. At the same time, since the distance between the bottom end of the weighing cylinder 3 and the mounting bracket 5 is greater than the distance between the bottom end of the discharge pipe 303 and the pressing plate 803, when the discharge pipe 303 descends synchronously with the weighing cylinder 3, it will never be blocked and limited by the pressing plate 803. Therefore, the weighing cylinder 3 can always move downward correspondingly according to the different weights of the raw materials, avoiding the weighing cylinder 3 being blocked during downward movement and affecting the subsequent feeding process.

[0043] As Figure 2 shown, blocking portions are provided at both ends of the threaded portion 604, and the length of the threaded portion 604 is greater than the sum of the distance between the bottom end of the weighing cylinder 3 and the mounting bracket 5 and the distance between the bottom end of the plug 3042 and the first bracket 3031.

[0044] Specifically, in the extreme case, when the weighing cylinder 3 descends to the bottom of the mounting bracket 5, when the pressing plate 803 presses the baffle 3041 downward until the plug 3042 disengages from the discharge hole 306, it is necessary to ensure that the threaded portion 604 has sufficient length to enable the screw sleeve 801 to drive the lifting plate 8 and the pressing plate 803 to achieve the normal pressing and feeding function.

[0045] AsFigure 3 As shown in the figure, a conical surface slide 202 is provided at the bottom of the inner cavity of the loading cylinder 2. A loading hole 203 is provided through the bottom of the conical surface slide 202. The loading hole 203 is communicated with the mixing tank 1. A second bracket 204 is fixedly provided at the upper end of the loading hole 203. The bottom of the central shaft 6 is rotatably installed in the second bracket 204.

[0046] Furthermore, a rotating frame 601 is fixedly connected to the outer wall of the central shaft 6. A plurality of scraping bars 602 are fixedly connected to the outer circumference of the rotating frame 601 in a circumferential and uniform manner. The scraping bars 602 are inclined and abutted against the surface of the conical surface slide 202.

[0047] Specifically, the second bracket 204 is used to support and limit the central shaft 6, ensuring the stability of the rotation process of the central shaft 6. During the rotation of the central shaft 6, the scraping bars 602 will be driven to rotate and scrape on the surface of the conical surface slide 202, so that the raw materials attached to the conical surface slide 202 can smoothly slide into the loading hole 203.

[0048] As Figure 2 shown in the figure, a mixing shaft 7 is rotatably installed at the bottom of the mixing tank 1. Mixing rods 701 are uniformly connected to the outer wall of the mixing shaft 7. The bottom of the central shaft 6 is connected to the top of the mixing shaft 7 through a coupling 603.

[0049] Specifically, during the rotation of the central shaft 6, the pressing and feeding process will be realized through the threaded part 604, the screw sleeve 801 and the pressing plate 803. At the same time, the scraping bars 602 will be driven to scrape the raw materials attached to the conical surface slide 202, and the mixing shaft 7 will be driven to rotate to realize the mixing process, so as to realize the synchronous linkage of the feeding, scraping and mixing processes, greatly improving the mixing and feeding efficiency.

[0050] The working principle of the present invention: As Figures 1-8As shown, in the initial state, the horizontal heights of all weighing cylinders 3 are kept consistent. At the same time, the weighing sensors 305 are zeroed to ensure the consistency and accuracy of the weighing process. When weighing the raw materials for compound fertilizer, different types of basic fertilizers, such as urea, ammonium phosphate, potassium chloride, etc., are respectively put into different weighing cylinders 3. The weighing cylinders 3 have a certain up-and-down floating space within the mounting frame 5. After adding the raw materials, the pressure signals generated by the raw materials in the weighing cylinders 3 are collected by the weighing sensors 305, so that different weights of basic fertilizers can be weighed according to the formula requirements of the compound fertilizer. Since the contents of different component raw materials in the compound fertilizer are different and their weights are also different, the downward moving distances of different weighing cylinders 3 are also different. The higher the content of the raw material, the heavier it is, and the farther the weighing cylinder 3 moves downward, so that the corresponding baffle plates 3041 of different component raw materials are at different heights. When weighing, the weighing cylinder 3 will press downward on the return spring 301 under the action of gravity, and drive the discharge pipe 303 and the ejector rod 304 to move downward synchronously. During this process, the plug 3042 will tightly abut against the discharge hole 306 under the action of the return spring 3043, effectively avoiding the leakage of raw materials. When mixing and feeding, the servo motor 4 drives the central shaft 6 to rotate. By using the thread fit between the threaded portion 604 and the nut 801, the lifting plate 8 moves downward along the central shaft 6 until the pressing plate 803 presses against the highest baffle plate 3041 and drives the ejector rod 304 to move downward, so that the plug 3042 disengages from the discharge hole 306. At this time, the raw material with the least content and the lightest weight in the weighing cylinder 3 will first fall into the mixing tank 1 through the discharge pipe 303. As the lifting plate 8 continues to move downward, the pressing plate 803 will press on different baffle plates 3041 in order from high to low, so that the raw materials in different weighing cylinders 3 are discharged in order of increasing content, so that the automatic feeding process can be carried out according to the level of different raw material contents. The raw material with the least content will fall to the bottom of the mixing tank 1, and so on. The raw material with the most content will fall to the top last. When mixing, the raw material with more content will continuously leak downward under its own gravity, so that it can be fully mixed with the raw materials of other components, effectively avoiding the problem that the raw material with more content accumulates at the bottom, which is beneficial to the full mixing of different raw materials of the compound fertilizer. During the rotation of the central shaft 6, the scraping strip 602 will be driven to scrape the raw materials adhering to the conical sliding table 202, and the mixing shaft 7 will be driven to rotate to realize the mixing process, so as to realize the synchronous linkage of feeding, scraping and mixing processes, greatly improving the mixing and feeding efficiency.

[0051] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A weighing device for compound fertilizer raw materials with automatic feeding, characterized in that, The invention comprises a mixing box (1), wherein a feeding cylinder (2) is fixedly arranged at the upper end of the mixing box (1), a plurality of mounting holes (201) are evenly arranged at the upper end of the feeding cylinder (2), a weighing cylinder (3) is movably mounted in each mounting hole (201) up and down, a mounting frame (5) is extended downwardly from the bottom of each mounting hole (201), a return spring (301) is arranged between the bottom of the weighing cylinder (3) and the mounting frame (5), a discharge pipe (303) is fixedly arranged at the bottom of the weighing cylinder (3), and the bottom of the inner cavity of the weighing cylinder (3) passes through the discharge hole (306) The discharge pipe (303) is connected to the discharge pipe (303), a push rod (304) is coaxially arranged inside the discharge pipe (303), a baffle (3041) is fixedly connected to the bottom end of the push rod (304), a plug (3042) for sealing the discharge hole (306) is fixedly connected to the top end of the push rod (304), a first bracket (3031) is fixedly arranged on the inner wall of the discharge pipe (303), a return spring (3043) is arranged between the bottom of the plug (3042) and the first bracket (3031), and a weighing sensor (305) is fixedly arranged at the bottom of the weighing cylinder (3); A servo motor (4) is fixedly arranged at the center of the upper end of the loading barrel (2); the output end of the servo motor (4) is fixedly connected to a central shaft (6); a threaded portion (604) is arranged on the central shaft (6); a lifting plate (8) is penetrated through the threaded portion (604); a screw sleeve (801) is fixedly arranged at the center of the lifting plate (8); the threaded portion (604) and the screw sleeve (801) are threadedly penetrated and matched; a pressing plate (803) corresponding to the baffle plate (3041) is fixedly connected to the outer wall of the lifting plate (8) through a connecting rod (802); the push rod (304) slides through the corresponding pressing plate (803), and the pressing plate (803) is located above the corresponding baffle plate (3041).

2. The compound fertilizer raw material weighing device with automatic feeding according to claim 1, characterized in that, A clearance hole (501) is provided through the bottom of the mounting frame (5), and the discharge pipe (303) is slidably installed in the clearance hole (501) up and down. Limiting straight grooves (502) are provided through the two sides of the mounting frame (5), and limiting blocks (302) are extended on both sides of the weighing cylinder (3), and the limiting blocks (302) are adapted to be slidably installed in the limiting straight grooves (502).

3. The weighing device for compound fertilizer raw materials with automatic feeding according to claim 1, wherein, The top end of the plug (3042) is provided with an inclined platform, and the bottom end of the discharge hole (306) is provided with an inclined surface, and the plug (3042) rests on the inclined surface at the bottom end of the discharge hole (306) through the inclined platform.

4. An automatic feeding compound fertilizer raw material weighing device according to claim 3, characterized in that, The diameter of the discharge hole (306) is smaller than the diameter of the plug (3042), and the diameter of the plug (3042) is smaller than the inner diameter of the discharge pipe (303).

5. An automatic feeding compound fertilizer raw material weighing device according to claim 1, characterized in that, The weighing cylinder (3) protrudes upwardly and is disposed in the mounting hole (201), and the distance between the top end of the weighing cylinder (3) and the top end of the feeding cylinder (2) is greater than the distance between the bottom end of the weighing cylinder (3) and the mounting frame (5), and the distance between the bottom end of the weighing cylinder (3) and the mounting frame (5) is greater than the distance between the bottom end of the discharge pipe (303) and the pressing plate (803).

6. The automatic feeding compound fertilizer raw material weighing device according to claim 5, characterized in that, Blocking portions are provided at both ends of the threaded portion (604), and the length of the threaded portion (604) is greater than the sum of the distances between the bottom end of the weighing cylinder (3) and the mounting frame (5) and between the bottom end of the plug (3042) and the first bracket (3031).

7. An automatic feeding compound fertilizer raw material weighing device according to claim 1, characterized in that, A conical surface slide (202) is provided at the bottom of the inner cavity of the feeding cylinder (2). A feeding hole (203) is provided through the bottom of the conical surface slide (202). The feeding hole (203) communicates with the mixing tank (1). A second bracket (204) is fixedly provided at the upper end of the feeding hole (203). The bottom of the central shaft (6) is rotatably mounted in the second bracket (204).

8. An automatic feeding compound fertilizer raw material weighing device according to claim 7, characterized in that, A rotating frame (601) is fixedly connected to the outer wall of the central shaft (6). A plurality of scraping bars (602) are fixedly connected circumferentially and uniformly on the outside of the rotating frame (601). The scraping bars (602) are inclined and abutted against the surface of the conical surface slide (202).

9. An automatic feeding compound fertilizer raw material weighing device according to any one of claims 1-8, characterized in that, A stirring shaft (7) is rotatably mounted at the bottom of the mixing tank (1). Stirring rods (701) are uniformly connected to the outer wall of the stirring shaft (7). The bottom of the central shaft (6) is connected to the top of the stirring shaft (7) through a coupling (603).

Images