Automatic chemical adding system for coal flotation

Abstract

The invention discloses an automatic chemical adding system for coal flotation. The automatic chemical adding system comprises a mixing cavity, multiple layers of stirring blades and a filling mechanism. According to the automatic chemical adding system for coal flotation, the top face of a mounting cavity is fixedly connected with a mixing cavity, a raw material box is arranged above the mixing cavity, the interior of the raw material box is divided into a foaming agent chamber and a collecting agent chamber through a partition plate, five filling mechanisms are evenly arranged between the foaming agent chamber and the mixing cavity, and ten filling mechanisms are evenly arranged between the collecting agent chamber and the mixing cavity. A stirring shaft is rotationally installed in the mixing cavity, multiple layers of stirring blades are fixedly connected to the outer side of the stirring shaft, foaming agents and collecting agents are added into the mixing cavity through the filling mechanism, and therefore primary mixing is achieved, meanwhile, the stirring shaft is driven by a first motor to drive the multiple layers of stirring blades to rotate to evenly mix the foaming agents and the collecting agents entering the mixing cavity, and the mixing efficiency is improved. And the stirring of the impeller of the flotation equipment is matched, so that the injected foaming agent and collecting agent are uniformly mixed, and the flotation is conveniently carried out.

Description

Technical Field

[0001] The invention relates to the technical field of coal processing, in particular to an automatic dosing system for coal flotation. Background Art

[0002] Flotation is a mineral separation method that uses the differences in physical and chemical properties of mineral surfaces to separate minerals. The most widely used in industry is foam flotation, which is characterized by the fact that useful minerals selectively attach to air bubbles in the pulp and then float to the surface of the pulp, thereby separating useful minerals from gangue.

[0003] Before flotation, the ore should be ground to the particle size required by flotation, so that the useful minerals can be basically separated into monomers for sorting. Flotation reagents are added. During flotation, air is introduced into the pulp to form a large number of bubbles. Then the particles that are not easily wetted by water, usually called hydrophobic minerals, adhere to the bubbles and float to the surface of the pulp with the bubbles to form a mineralized foam layer; while those that are easily wetted by water, usually called hydrophilic minerals, cannot adhere to the bubbles and remain in the pulp. The mineralized foam is discharged to achieve the purpose of sorting.

[0004] Traditional flotation is usually done manually, and the flotation effect is completely dependent on the skills and experience of the flotation operator, which is labor-intensive and has high labor costs. The flotation reagent has a strong odor, which may cause occupational hazards to the workers, and there are fewer and fewer skilled flotation workers. Existing flotation usually uses automated equipment for dosing.

[0005] However, in the existing dosing system, the frother and the collector are usually added separately or directly added through a common pipeline, resulting in poor mixing uniformity of the frother and the collector entering the stirring impeller position, affecting the flotation effect. Therefore, an automatic dosing system for coal flotation is proposed to solve the above existing problems. Summary of the invention

[0006] The object of the present invention is to provide an automatic dosing system for coal flotation to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A coal flotation automatic dosing system comprises an installation cavity installed on the top surface of a flotation device, the top surface of the installation cavity is fixedly connected with a mixing cavity, a raw material box is arranged above the mixing cavity, the raw material box is divided into a frother chamber and a collector chamber by a partition, five filling mechanisms are evenly arranged between the frother chamber and the mixing cavity, ten filling mechanisms are evenly arranged between the collector chamber and the mixing cavity, a stirring shaft is rotatably installed in the mixing cavity, a plurality of layers of stirring blades are fixedly connected to the outer side of the stirring shaft, a first motor is fixedly installed at a position of the top surface of the mixing cavity corresponding to the stirring shaft, an output end of the first motor is fixedly connected to the stirring shaft, a discharge pipe is fixedly connected to the bottom surface of the mixing cavity, and the discharge pipe is inserted into the installation cavity.

[0009] As a further solution of the present invention: electromagnetic four-way valves are provided on the top surfaces of the raw material box corresponding to the foaming agent chamber and the collecting agent chamber, a vacuum pump is fixedly installed on the side wall of the raw material box, an air inlet end of the vacuum pump is connected to an electromagnetic three-way valve through a pipeline, two end ports of the electromagnetic three-way valve are respectively connected to one of the ports of the two electromagnetic four-way valves through a pipeline, and one port of the electromagnetic four-way valve is connected to a feed pipe.

[0010] As a further solution of the present invention: the flotation equipment is rotatably connected to a hollow shaft at the installation cavity corresponding to the above-mentioned flotation equipment, the top end of the hollow shaft is inserted into the discharge pipe and rotatably installed with the discharge pipe, the hollow shaft and the discharge pipe are rotatably sealed, an impeller is fixedly connected to the outer side of the bottom end of the hollow shaft, a worm wheel is fixedly connected to the outer side of the top surface of the hollow shaft, a worm gear meshing with the worm gear is provided on the outer side of the worm wheel, the worm gear is rotatably installed in the installation cavity, a second motor is fixedly installed at the end of the worm gear corresponding to the outside of the installation cavity, the output end of the second motor is fixedly connected to the worm gear, and liquid level sensors are fixedly installed on the bottom side walls of the raw material box corresponding to the foaming agent chamber and the collecting agent chamber.

[0011] As a further solution of the present invention: a weighing sensor is symmetrically and fixedly connected to the top surface of the mixing chamber corresponding to the bottom of the raw material box.

[0012] As a further solution of the present invention: the filling mechanism includes a piston cylinder, one end of which is symmetrically fixedly connected with a suction pipe and an extrusion pipe, and both the extrusion pipe and the suction pipe are equipped with a one-way valve, and the other end of the piston cylinder is equipped with a cylinder, and a piston head matching with it is slidably connected in the piston cylinder, and the telescopic end of the cylinder is inserted into the piston cylinder and fixedly installed with the piston head.

[0013] As a further solution of the present invention: the bottom end of the extrusion tube is inserted into the mixing chamber and communicated with the mixing chamber, the outer sliding sleeve of the suction tube is provided with a connecting tube adapted thereto, the suction tube and the connecting tube are slidingly sealed, and the top end of the connecting tube is inserted into the raw material box and communicated with the foaming agent chamber or the collecting agent chamber respectively.

[0014] As a further solution of the present invention: a filter screen is fixedly connected to the end of the connecting pipe corresponding to the inner side of the bottom of the raw material box, and the filter screen has a filtering effect to prevent impurities from entering the components below and causing damage.

[0015] As a further solution of the present invention: it also includes a control system, which includes a proportional control module and a weighing comparison module, the proportional control module includes a proportional adjustment unit and a proportional recording unit, and the weighing comparison module includes a weighing unit, a comparison unit and an error reporting unit.

[0016] As a further solution of the present invention: the operating steps of the control system are as follows:

[0017] Step 1: Set the proportion. The proportion control module sets the filling proportion. The filling proportion is controlled by the number of filling mechanisms. The filling proportion is 1-5:1-10. The proportion is adjusted by the proportion adjustment unit. At the same time, the set filling proportion is recorded by the proportion recording unit.

[0018] Step 2: Filling. The filling ratio X:Y is set to control the corresponding number of filling mechanisms to work. While working, the weighing sensor of the weighing unit is used to monitor the weighing. The weighing value is marked as A, and the filling amount of a filling mechanism is Z.

[0019] Step 3: Calculation, comparison calculation is performed through the comparison unit, the theoretical value is calculated by (X+Y)×Z, the theoretical value is recorded as C, and the comparison is performed through CA, and the comparison result is K;

[0020] Step 4: Report an error. Identify the calculation result. If K>0, an error will be reported through the error reporting unit. If K=0, no error will be reported.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention adds frother and collector through the mixing chamber of the filling mechanism box to achieve preliminary mixing. At the same time, the first motor drives the stirring shaft to drive the multi-layer stirring blades to rotate to evenly mix the entering frother and collector. The impeller of the flotation equipment is used for stirring, so that the added frother and collector are evenly mixed, which is convenient for flotation.

[0023] 2. The present invention realizes equal addition through piston pumping, and can conveniently control the filling ratio through adjustment of different numbers of filling mechanisms.

[0024] 3. The present invention uses weighing control of a weighing sensor in conjunction with a control system to perform weighing control, thereby comparing the theoretical filling amount with the actual filling amount. When a comparison deviation occurs, an error message will be given to remind the staff to perform maintenance to avoid adding errors.

[0025] 4. The present invention cooperates with the electromagnetic three-way valve and the electromagnetic four-way valve. The vacuum pump can evacuate the foaming agent chamber and the collecting agent chamber respectively through a pipeline connection, and cooperate with the feed pipe to perform vacuum negative pressure feeding. When the liquid level sensor senses that the liquid level is low, the raw materials can be conveniently supplemented, and the negative pressure feeding can effectively avoid the problem of excessive raw material overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of an automatic dosing system for coal flotation.

[0027] Figure 2 This is a cross-sectional view of an automatic dosing system for coal flotation.

[0028] Figure 3 This is a diagram showing the filling mechanism in an automatic dosing system for coal flotation.

[0029] Figure 4 This is a diagram showing the local structure of an automatic dosing system for coal flotation.

[0030] Figure 5 This is a control system block diagram of an automatic dosing system for coal flotation.

[0031] In the figure: 1. flotation equipment; 2. installation chamber; 3. mixing chamber; 4. raw material box; 5. frother chamber; 6. collector chamber; 7. filling mechanism; 8. stirring shaft; 9. multi-layer stirring blades; 10. first motor; 11. discharge pipe; 12. electromagnetic four-way valve; 13. hollow shaft; 14. impeller; 15. worm gear; 16. worm; 17. second motor; 18. weighing sensor; 19. piston cylinder; 20. suction pipe; 21. extrusion pipe; 22. one-way valve; 23. cylinder; 24. piston head; 25. connecting pipe; 26. filter screen; 27. vacuum pump; 28. liquid level sensor; 29. ​​electromagnetic three-way valve; 30. feed pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 5In an embodiment of the present invention, an automatic dosing system for coal flotation includes an installation cavity 2 installed on the top surface of a flotation device 1, a mixing cavity 3 is fixedly connected to the top surface of the installation cavity 2, a raw material box 4 is arranged above the mixing cavity 3, and the raw material box 4 is divided into a frother chamber 5 and a collector chamber 6 by a partition, five filling mechanisms 7 are evenly arranged between the frother chamber 5 and the mixing cavity 3, and ten filling mechanisms 7 are evenly arranged between the collector chamber 6 and the mixing cavity 3. A stirring shaft 8 is rotatably installed in the mixing cavity 3, and a multi-layer stirring blade 9 is fixedly connected to the outer side of the stirring shaft 8. A first motor 10 is fixedly installed on the top surface of the mixing cavity 3 corresponding to the stirring shaft 8, and the output end of the first motor 10 is fixedly connected to the stirring shaft 8. A discharge pipe 11 is fixedly connected to the bottom surface of the mixing cavity 3, and the discharge pipe 11 is inserted into the installation cavity 2.

[0034] The frother and collector are added to the mixing chamber 3 through the filling mechanism 7 to achieve preliminary mixing. At the same time, the first motor 10 drives the stirring shaft 8 to drive the multi-layer stirring blades 9 to rotate to evenly mix the entering frother and collector. The impeller of the flotation equipment 1 is used for stirring, so that the added frother and collector are evenly mixed, which is convenient for flotation.

[0035] An electromagnetic four-way valve 12 is provided on the top surface of the raw material box 4 corresponding to the foaming agent chamber 5 and the collecting agent chamber 6, a vacuum pump 27 is fixedly installed on the side wall of the raw material box 4, and the air inlet end of the vacuum pump 27 is connected to an electromagnetic three-way valve 29 through a pipeline, and the two end ports of the electromagnetic three-way valve 29 are respectively connected to one of the ports of the two electromagnetic four-way valves 12 through a pipeline, and one port of the electromagnetic four-way valve 12 is connected to a feed pipe 30, and a liquid level sensor 28 is fixedly installed on the bottom side wall of the raw material box 4 corresponding to the foaming agent chamber 5 and the collecting agent chamber 6.

[0036] Through the cooperation of the electromagnetic three-way valve 29 and the electromagnetic four-way valve 12, the vacuum pump 27 can evacuate the foaming agent chamber 5 and the collecting agent chamber 6 respectively through the pipeline connection, and cooperate with the feeding pipe 30 to perform vacuum negative pressure feeding. When the liquid level sensor 28 senses that the liquid level is low, the raw materials can be conveniently supplemented, and the negative pressure feeding can effectively avoid the problem of excessive raw material overflow.

[0037] A hollow shaft 13 is rotatably connected to the corresponding mounting cavity 2 of the flotation device 1. The top end of the hollow shaft 13 is inserted into the discharge pipe 11 and is rotatably mounted with the discharge pipe 11. The hollow shaft 13 and the discharge pipe 11 are rotatably sealed. An impeller 14 is fixedly connected to the outer side of the bottom end of the hollow shaft 13. A worm gear 15 is fixedly connected to the outer side of the top surface of the hollow shaft 13. A worm 16 meshing with the worm gear 15 is provided on the outer side of the worm gear 15. The worm 16 is rotatably mounted in the mounting cavity 2. A second motor 17 is fixedly mounted on the end of the worm 16 corresponding to the outside of the mounting cavity 2. The output end of the second motor 17 is fixedly connected to the worm 16.

[0038] A weighing sensor 18 is symmetrically fixedly connected to the top surface of the mixing chamber 3 and corresponds to the bottom of the raw material box 4 .

[0039] The filling mechanism 7 includes a piston cylinder 19, one end of which is symmetrically fixedly connected with a suction pipe 20 and an extrusion pipe 21, and a one-way valve 22 is installed on the extrusion pipe 21 and the suction pipe 20. The other end of the piston cylinder 19 is installed with a cylinder 23, and a piston head 24 adapted to it is slidably connected inside the piston cylinder 19. The telescopic end of the cylinder 23 is inserted into the piston cylinder 19 and fixedly installed with the piston head 24.

[0040] The bottom end of the extrusion tube 21 is inserted into the mixing chamber 3 and communicated with the mixing chamber 3. The outer sliding sleeve of the suction tube 20 is provided with a connecting tube 25 adapted thereto. The suction tube 20 and the connecting tube 25 are slidingly sealed. The top end of the connecting tube 25 is inserted into the raw material box 4 and communicated with the foaming agent chamber 5 or the collecting agent chamber 6 respectively.

[0041] A filter screen plate 26 is fixedly connected to the inner side of the bottom of the raw material box 4 corresponding to the end of the connecting pipe 25. The filter screen plate 26 has a filtering effect to prevent impurities from entering the components below and causing damage.

[0042] A coal flotation automatic dosing system also includes a control system, which includes a proportional control module and a weighing comparison module. The proportional control module includes a proportional adjustment unit and a proportional recording unit, and the weighing comparison module includes a weighing unit, a comparison unit and an error reporting unit.

[0043] The operating steps of the control system are as follows:

[0044] Step 1: Setting the ratio, the proportion control module sets the filling ratio, and controls the filling ratio by controlling the number of the filling mechanism 7, the filling ratio is 1-5:1-10, and the proportion is adjusted by the proportion adjustment unit, and the set filling ratio is recorded by the proportion recording unit;

[0045] Step 2: Filling, the filling mechanism 7 of the corresponding number is controlled to work by setting the filling ratio X:Y, and the weighing sensor 18 of the weighing unit is used for weighing monitoring at the same time, the weighing value is marked as A, and the filling amount of one filling mechanism 7 is Z;

[0046] Step 3: Calculation, comparison calculation is performed through the comparison unit, the theoretical value is calculated by (X+Y)×Z, the theoretical value is recorded as C, and the comparison is performed through CA, and the comparison result is K;

[0047] Step 4: Report an error. Identify the calculation result. If K>0, an error will be reported through the error reporting unit. If K=0, no error will be reported.

[0048] By pumping with the piston, equal amounts of addition can be achieved, and by adjusting different numbers of filling mechanisms 7, the filling ratio can be conveniently controlled.

[0049] The weighing control of the weighing sensor 18 is carried out in cooperation with the control system to compare the theoretical filling amount with the actual filling amount. When there is a comparison deviation, an error will be reported to remind the staff to carry out maintenance to avoid adding errors.

[0050] The first motor 10, the second motor 17, the weighing sensor 18, the electromagnetic four-way valve 12, the electromagnetic three-way valve 29, the vacuum pump 27 and the liquid level sensor 28 are all connected to the external controller and the power supply through wires, the cylinder 23 is connected to the external air source and the electromagnetic valve, and the electromagnetic valve is connected to the external controller.

[0051] The working principle of the present invention is:

[0052] When in use, the foaming agent and the collector are added to the foaming agent chamber 5 and the collector chamber 6 through the electromagnetic four-way valve 12. At this time, the ratio is set through the ratio adjustment unit, such as setting the foaming agent and the collector to add 1 part each, and setting the ratio to 1:1. At this time, one of the filling mechanisms 7 corresponding to the foaming agent chamber 5 and the collector chamber 6 is working. At this time, the cylinder 23 works reciprocatingly to pull the piston head 24 to move in the piston cylinder 19. With the cooperation of the one-way valve 22, the raw materials in the raw material box 4 are extracted through the suction pipe 20 and transported to the mixing chamber 3 through the extrusion pipe 21. The first motor 10 drives the stirring shaft 8 to drive the multi-layer stirring blades 9 to rotate, thereby mixing the raw materials. At this time, the mixed foaming agent and collector enter the flotation device through the discharge pipe 11 and the hollow shaft 13. At this time, under the drive of the second motor 17, the worm gear 15 cooperates with the worm 16 to drive the hollow shaft 13 to drive the impeller 14 to rotate, thereby stirring the added mixed reagent and mixing it with the coal to perform flotation. When the filling mechanism 7 is working, the weighing sensor 18 always weighs the raw material box 4, and judges the blockage of the filter plate 26 by weighing and comparing the filling times. When the filter plate 26 is blocked, the filling mechanism 7 cannot be drawn in, resulting in a small or inconvenient weighing change. At this time, the filter plate 26 can be cleaned and the equipment maintenance can be carried out.

[0053] When the liquid level in the foaming agent chamber 5 and the collector chamber 6 is low, the liquid level sensor 28 is induced to control the electromagnetic three-way valve 29 to be connected with the corresponding electromagnetic four-way valve 12, and at the same time, the electromagnetic four-way valve 12 is controlled to be connected with the corresponding foaming agent chamber 5 and the collector chamber 6, so that the vacuum pump 27 is directly connected with the corresponding foaming agent chamber 5 and the collector chamber 6, so as to perform a vacuum operation, so that a negative pressure environment is formed in the foaming agent chamber 5 and the collector chamber 6. At this time, the electromagnetic four-way valve 12 is switched so that the feed pipe 20 is connected with the inside of the foaming agent chamber 5 and the collector chamber 6, so as to perform negative pressure siphon feeding. After the feeding is completed, the electromagnetic four-way valve 12 is switched to the blank port to connect with the outside to maintain the normal pressure in the foaming agent chamber 5 and the collector chamber 6.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal flotation automatic dosing system, comprising a mounting chamber (2) mounted on the top surface of a flotation device (1) and a control system, characterized in that: The top surface of the installation chamber (2) is fixedly connected to a mixing chamber (3), a raw material box (4) is arranged above the mixing chamber (3), the raw material box (4) is divided into a foaming agent chamber (5) and a collecting agent chamber (6) by a partition, five filling mechanisms (7) are evenly arranged between the foaming agent chamber (5) and the mixing chamber (3), ten filling mechanisms (7) are evenly arranged between the collecting agent chamber (6) and the mixing chamber (3), a stirring shaft (8) is rotatably installed in the mixing chamber (3), and a plurality of stirring mechanisms (8) are fixedly connected to the outer side of the stirring shaft (8) The blade (9) is provided, a first motor (10) is fixedly installed on the top surface of the mixing chamber (3) corresponding to the stirring shaft (8), the output end of the first motor (10) is fixedly connected to the stirring shaft (8), the bottom surface of the mixing chamber (3) is fixedly connected to a discharge pipe (11), and the discharge pipe (11) is inserted into the installation chamber (2), the control system includes a proportional control module and a weighing comparison module, the proportional control module includes a proportional adjustment unit and a proportional recording unit, and the weighing comparison module includes a weighing unit, a comparison unit and an error reporting unit.

2. The automatic dosing system for coal flotation according to claim 1 is characterized by: An electromagnetic four-way valve (12) is installed on the top surface of the raw material box (4) corresponding to the foaming agent chamber (5) and the collecting agent chamber (6); a vacuum pump (27) is fixedly installed on the side wall of the raw material box (4); an air inlet end of the vacuum pump (27) is connected to an electromagnetic three-way valve (29) through a pipeline; two end ports of the electromagnetic three-way valve (29) are respectively connected to one of the ports of the two electromagnetic four-way valves (12) through pipelines; and one port of the electromagnetic four-way valve (12) is connected to a feed pipe (30).

3. The automatic dosing system for coal flotation according to claim 2 is characterized by: Liquid level sensors (28) are fixedly mounted on the bottom side walls of the raw material box (4) corresponding to the foaming agent chamber (5) and the collecting agent chamber (6).

4. The automatic dosing system for coal flotation according to claim 1 is characterized by: The flotation device (1) is rotatably connected to a hollow shaft (13) at a location corresponding to the installation cavity (2); the top end of the hollow shaft (13) is inserted into a discharge pipe (11) and rotatably installed with the discharge pipe (11); and an impeller (14) is fixedly connected to the outside of the bottom end of the hollow shaft (13).

5. The automatic dosing system for coal flotation according to claim 4 is characterized by: A worm wheel (15) is fixedly connected to the outer side of the top surface of the hollow shaft (13); a worm (16) meshing with the worm wheel (15) is provided on the outer side of the worm wheel (15); the worm (16) is rotatably mounted in the mounting cavity (2); a second motor (17) is fixedly mounted at the end of the worm (16) outside the mounting cavity (2); and an output end of the second motor (17) is fixedly connected to the worm (16).

6. The automatic dosing system for coal flotation according to claim 1 is characterized by: A weighing sensor (18) is symmetrically and fixedly connected to the top surface of the mixing chamber (3) corresponding to the bottom of the raw material box (4).

7. The automatic dosing system for coal flotation according to claim 1 is characterized by: The filling mechanism (7) comprises a piston cylinder (19), one end of which is symmetrically fixedly connected to a suction pipe (20) and an extrusion pipe (21), both the extrusion pipe (21) and the suction pipe (20) being provided with a one-way valve (22), the other end of the piston cylinder (19) being provided with a cylinder (23), a piston head (24) matching the piston cylinder (19) being slidably connected therein, and a telescopic end of the cylinder (23) being inserted into the piston cylinder (19) and fixedly installed with the piston head (24).

8. The automatic dosing system for coal flotation according to claim 7, characterized in that: The bottom end of the extrusion tube (21) is inserted into the mixing chamber (3) and communicated with the mixing chamber (3); the outer sliding sleeve of the suction tube (20) is provided with a connecting tube (25) adapted thereto; the top end of the connecting tube (25) is inserted into the raw material box (4) and communicated with the foaming agent chamber (5) or the collecting agent chamber (6) respectively.

9. The automatic dosing system for coal flotation according to claim 1, characterized in that: A filter screen plate (26) is fixedly connected to the inner side of the bottom of the raw material box (4) corresponding to the end of the connecting pipe (25).

10. The automatic dosing system for coal flotation according to claim 1, characterized in that: The operating steps of the control system are as follows: Step 1: Setting the ratio, the proportion control module sets the filling ratio, and the filling ratio is controlled by the number control of the filling mechanism (7), the filling ratio is 1-5:1-10, and the proportion is adjusted by the proportion adjustment unit, and the set filling ratio is recorded by the proportion recording unit; Step 2: Filling, by setting the filling ratio X:Y to control the corresponding number of filling mechanisms (7) to work, while the weighing sensor (18) of the weighing unit is used to monitor the weighing, the weighing value is marked as A, and the filling amount of one filling mechanism (7) is Z; Step 3: Calculation, comparison calculation is performed through the comparison unit, the theoretical value is calculated by (X+Y)×Z, the theoretical value is recorded as C, and the comparison is performed through CA, and the comparison result is K; Step 4: Report an error. Identify the calculation result. If K>0, an error will be reported through the error reporting unit. If K=0, no error will be reported.

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