Automatic soil adding device for cold rolling mill plate filter and control method thereof

Abstract

The present application relates to a kind of cold rolling mill plate filter automatic soil device and its control method, including rack, diatomite bin, cellulose bin are respectively provided with on the rack through weighing sensor, first mixing box and second mixing box are arranged on the side of rack, the lower end of diatomite bin, cellulose bin, white soil bin is all provided with two corresponding to first mixing box and second mixing box's material extraction pipeline, two-stage material extraction negative pressure pump is all provided on the material extraction pipeline, oil inlet pipe and oil outlet pipe are all provided on the first mixing box and second mixing box, and oil inlet electric valve is installed on the oil inlet pipe.This device helps to replace manual operation, reduce labor cost, improve soil efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to an automatic soil adding device of a cold rolling mill plate filter and a control method thereof. BACKGROUND

[0002] During the working process of a cold rolling mill, rolling oil inevitably mixes with various impurities such as metal particles, oxides and dust. The rolling oil plate filter system can effectively filter out the impurities, maintain the cleanliness of the rolling oil, prolong the service life of the rolling oil, reduce the wear of the rolling mill and the rolled piece caused by the impurities, and provide better lubrication and cooling effects, which helps to reduce defects and defective products in the rolling process, thereby improving the product quality. The main purpose of adding soil in the rolling oil plate filter system is to improve the filtering precision and optimize the filtering performance, so as to ensure the quality and cleanliness of the rolling oil. However, the soil adding mode in the rolling oil plate filter system is manual soil adding. The operator opens or closes the oil inlet valve manually according to the soil adding process and observes the rolling oil level in the stirring box, and then manually adds soil into the stirring box according to the diatomite, cellulose and white soil formula of each process. However, the rolling oil filtering process needs frequent soil adding, and the manual soil adding weight has errors. SUMMARY

[0003] The application aims to provide an automatic soil adding device of a cold rolling mill plate filter and a control method thereof, which helps to replace manual operation, reduce labor cost and improve soil adding efficiency.

[0004] The technical scheme of the application is as follows: an automatic soil adding device of a cold rolling mill plate filter, comprising a rack, diatomite hoppers, cellulose hoppers and white soil hoppers are arranged on the rack through weighing sensors, a first stirring box and a second stirring box are arranged on one side of the rack, two corresponding material extraction pipelines leading to the first stirring box and the second stirring box are arranged at the lower ends of the diatomite hoppers, the cellulose hoppers and the white soil hoppers, two-stage material extraction negative pressure pumps are arranged on the material extraction pipelines, oil inlet pipes and oil outlet pipes are arranged on the first stirring box and the second stirring box, and oil inlet electric valves are installed on the oil inlet pipes.

[0005] Further, the diatomite hoppers, the cellulose hoppers and the white soil hoppers are connected with the rack through a pair of weighing sensors, and vibrators are arranged on the diatomite hoppers, the cellulose hoppers and the white soil hoppers.

[0006] Further, a buffer hopper is arranged at the lower part of each of the diatomite hoppers, the cellulose hoppers and the white soil hoppers, and an auger mechanism driven by an auger motor is arranged in the buffer hopper of the cellulose hopper.

[0007] Further, the bottom end of the buffer bin of the diatomite bin, cellulose bin, and white clay bin is provided with a first and second material extraction pipeline corresponding to the first and second stirring tanks, and a first material extraction negative pressure pump is arranged at the connection end of the buffer bin and the first and second material extraction pipelines, and a second material extraction negative pressure pump is arranged at the middle part of the first and second material extraction pipelines.

[0008] Further, the buffer bin is provided with an observation window.

[0009] Further, the first and second stirring tanks are provided with a stirring shaft driven by a stirring motor, and a liquid level sensor and low, medium, and high liquid level sensing positions are arranged in the first and second stirring tanks.

[0010] The control method of the automatic soil adding device of the plate filter of the cold rolling mill comprises the following steps:

[0011] (1) First soil adding: open the oil inlet electric valve of the first and second stirring tanks to start adding rolling oil; when the low liquid level sensing position of the first and second stirring tanks is sensed, start adding diatomite G1 kg, cellulose X1 kg, and white clay B1 kg; when the liquid level sensing position of G 硅藻土 =G1, G 纤维素 =X1, G 白土 =B1 is sensed, close the oil inlet electric valve of the first and second stirring tanks, and extract the rolling oil in the first and second stirring tanks to the plate filter system;

[0012] (2) Second soil adding: extract the rolling oil in the first and second stirring tanks to the plate filter system; when the low liquid level sensing position of the first and second stirring tanks is sensed, open the oil inlet electric valve of the first and second stirring tanks to start adding rolling oil; when the medium liquid level sensing position of the first and second stirring tanks is sensed, start adding diatomite G2 kg, cellulose X2 kg, and white clay B2 kg; when the high liquid level sensing position of G 硅藻土 =G2, G 纤维素 =X2, G 白土 =B2 is sensed, close the oil inlet electric valve of the first and second stirring tanks, and extract the rolling oil in the first and second stirring tanks to the plate filter system;

[0013] (3) Third soil adding: extract the rolling oil in the first and second stirring tanks to the plate filter system; when the low liquid level sensing position of the first and second stirring tanks is sensed, open the oil inlet electric valve of the first and second stirring tanks to start adding rolling oil; when the medium liquid level sensing position of the first and second stirring tanks is sensed, start adding diatomite G3 kg, cellulose X3 kg, and white clay B3 kg; when the high liquid level sensing position of G 硅藻土 =G3, G 纤维素 =X3, G 白土When the high liquid level of the first and second stirring tanks is sensed, the oil inlet electric valve of the first and second stirring tanks is closed, and the rolling oil in the first and second stirring tanks is pumped to the plate filter system;

[0014] (4) The third time, the subsequent automatic soil adding action steps remain unchanged, the soil adding times are set according to the actual use requirements, and the diatomite, cellulose and white clay are automatically added according to the formula each time. When all the soil adding times are completed, the rolling oil in the first and second stirring tanks is pumped to the plate filter system, and the low liquid level of the first and second stirring tanks is sensed to alarm the operator and request the plate filter system to be purged to prepare for the next automatic soil adding.

[0015] Further, when pumping the material each time, the secondary pumping negative pressure pump in the two-stage pumping negative pressure pump is started first to add the residual soil in the pumping pipeline to the stirring tank, and after a delay for several seconds, the primary pumping negative pressure pump in the two-stage pumping negative pressure pump is started. The primary pumping negative pressure pump and the secondary pumping negative pressure pump work simultaneously to add the soil in the material bin to the first and second stirring tanks.

[0016] Further, the diatomite, cellulose and white clay formula from the fourth time to the seventeenth time is as follows:

[0017] The fourth time, the soil adding amount is diatomite 20 kg, cellulose 2 kg and white clay 3 kg;

[0018] The fifth time, the soil adding amount is diatomite 20 kg, cellulose 2 kg and white clay 3 kg;

[0019] The sixth time, the soil adding amount is diatomite 20 kg, cellulose 2 kg and white clay 3 kg;

[0020] The seventh time, the soil adding amount is diatomite 10 kg, cellulose 2 kg and white clay 2 kg;

[0021] The eighth time, the soil adding amount is diatomite 10 kg, cellulose 2 kg and white clay 2 kg;

[0022] The ninth time, the soil adding amount is diatomite 10 kg, cellulose 2 kg and white clay 1 kg;

[0023] The tenth time, the soil adding amount is diatomite 10 kg, cellulose 2 kg and white clay 1 kg;

[0024] The eleventh time, the soil adding amount is diatomite 10 kg, cellulose 2 kg and white clay 1 kg;

[0025] The twelfth time, the soil adding amount is diatomite 0 kg, cellulose 2 kg and white clay 0 kg;

[0026] The thirteenth time, the soil adding amount is diatomite 0 kg, cellulose 2 kg and white clay 0 kg;

[0027] The fourteenth amount of earth added: diatomite 0kg, cellulose 2kg, white clay 0kg;

[0028] The fifteenth amount of earth added: diatomite 0kg, cellulose 2kg, white clay 0kg;

[0029] The sixteenth amount of earth added: diatomite 0kg, cellulose 2kg, white clay 0kg;

[0030] The seventeenth amount of earth added: diatomite 0kg, cellulose 2kg, white clay 0kg.

[0031] Compared with the prior art, the device has the following advantages: the device helps to replace manual operation, realizes automation, helps to realize accurate proportioning of diatomite, cellulose and white clay, reduces manual operation, reduces labor cost and improves earth adding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 The device structure diagram of the application;

[0033] Fig. 2 The control system schematic diagram of the application;

[0034] In the figure: 1-frame, 2-weighing sensor, 10-diatomite bin, 11-vibrator, 12-buffer bin, 13-first diatomite extraction pipeline, 14-second diatomite extraction pipeline, 15-first-stage extraction negative pressure pump, 16-first second-stage extraction negative pressure pump, 17-second second-stage extraction negative pressure pump, 18-observation window, 20-cellulose bin, 21-vibrator, 22-buffer bin, 23-first cellulose extraction pipeline, 24-second cellulose extraction pipeline, 25-first-stage extraction negative pressure pump, 26-first second-stage extraction negative pressure pump, 27-second second-stage extraction negative pressure pump, 28-observation window, 29-auger motor, 30-white clay bin, 31-vibrator, 32-buffer bin, 33-first white clay extraction pipeline, 34-second white clay extraction pipeline, 35-first-stage extraction negative pressure pump, 36-first second-stage extraction negative pressure pump, 37-second second-stage extraction negative pressure pump, 38-observation window, 40-first mixing box, 41-oil inlet pipe, 42-oil outlet pipe, 43-oil inlet electric valve, 44-mixing motor, 45-mixing shaft, 50-second mixing box, 51-oil inlet pipe, 52-oil inlet pipe, 53-oil inlet electric valve, 54-mixing motor, 55-mixing shaft, 60-liquid level sensor, 61-low liquid level, 62-medium liquid level, 63-high liquid level;

[0035] 101-touch screen, 102-PLC, 103-diatomite bin weighing instrument, 104-diatomite bin weighing sensor 1, 105-diatomite bin weighing sensor 2, 106-first stirring tank diatomite first-stage and second-stage material extraction negative pressure pump, 107-second stirring tank diatomite first-stage and second-stage material extraction negative pressure pump, 108-cellulose bin weighing instrument, 109-cellulose bin weighing sensor 1, 110-cellulose bin weighing sensor 2, 111-first stirring tank cellulose first-stage and second-stage material extraction negative pressure pump, 112-second stirring tank cellulose first-stage and second-stage material extraction negative pressure pump, 113-auger motor 1, 114-auger motor 2, 115-white clay bin weighing instrument, 116-white clay bin weighing sensor 1, 117-white clay bin weighing sensor 2, 118-first stirring tank white clay first-stage and second-stage material extraction negative pressure pump, 119-second stirring tank white clay first-stage and second-stage material extraction negative pressure pump, 120-first stirring tank liquid level sensor, 121-first stirring tank oil inlet electric valve, 123-second stirring tank liquid level sensor, 124-second stirring tank oil inlet electric valve. DETAILED DESCRIPTION

[0036] In order to make the above features and advantages of the present application more apparent, the following specific examples are described in detail below, with reference to the accompanying drawings, but the present application is not limited thereto.

[0037] REFERENCE Figs. 1-2

[0038] An automatic white clay adding device for a plate filter of a cold rolling mill comprises a frame 1, a diatomite bin 10, a cellulose bin 20 and a white clay bin 30 provided on the frame through weighing sensors, a first stirring tank 40 and a second stirring tank 50 provided on one side of the frame, two material extraction pipes corresponding to the first stirring tank and the second stirring tank provided at the lower end of each of the diatomite bin, the cellulose bin and the white clay bin, two-stage material extraction negative pressure pumps provided on the material extraction pipes so as to add diatomite, cellulose and white clay into the first stirring tank and the second stirring tank, oil inlet pipes 41 and 51 and oil outlet pipes 42 and 52 provided on the first stirring tank and the second stirring tank, and oil inlet electric valves 43 and 53 installed on the oil inlet pipes 41 and 51. The device is further provided with a control system so as to control oil adding and white clay adding of the stirring tanks according to the white clay adding process, the formula of diatomite, cellulose and white clay, and the liquid level of the stirring tanks.

[0039] In the embodiment, the diatomite bin, the cellulose bin and the white clay bin are connected with the frame through a pair of weighing sensors 2, so as to measure and calculate the weight of the bin in real time. The diatomite bin, the cellulose bin and the white clay bin are correspondingly provided with a vibrator 11, a vibrator 21 and a vibrator 31, so as to facilitate the discharging.

[0040] In the embodiment, the lower parts of the diatomite bin, the cellulose bin and the white clay bin are correspondingly provided with a buffer bin 12, a buffer bin 22 and a buffer bin 32, so as to facilitate the discharging. Since the cellulose has high viscosity, two groups of auger mechanisms driven by an auger motor 29 are arranged in the buffer bin of the cellulose bin, and the auger mechanisms are vertical auger shafts arranged in the buffer bin, so that the cellulose is smoothly discharged.

[0041] In the embodiment, the lower end of the buffer bin of the diatomite bin is provided with a first diatomite discharging pipeline 13 and a second diatomite discharging pipeline 14 corresponding to the first stirring box and the second stirring box; the lower end of the buffer bin of the cellulose bin is provided with a first cellulose discharging pipeline 23 and a second cellulose discharging pipeline 24 corresponding to the first stirring box and the second stirring box; and the lower end of the buffer bin of the white clay bin is provided with a first white clay discharging pipeline 33 and a second white clay discharging pipeline 34 corresponding to the first stirring box and the second stirring box.

[0042] In the embodiment, the first diatomite discharging pipeline, the second diatomite discharging pipeline, the first cellulose discharging pipeline, the second cellulose discharging pipeline, the first white clay discharging pipeline and the second white clay discharging pipeline are connected with one end of the respective buffer bin and correspondingly provided with a first-stage discharging negative pressure pump 15, a first-stage discharging negative pressure pump 25 and a first-stage discharging negative pressure pump 35. The first diatomite discharging pipeline, the first cellulose discharging pipeline and the first white clay discharging pipeline are provided with a first two-stage discharging negative pressure pump 16, a first two-stage discharging negative pressure pump 26 and a first two-stage discharging negative pressure pump 36 at the end close to the first stirring box; and the second diatomite discharging pipeline, the second cellulose discharging pipeline and the second white clay discharging pipeline are provided with a second two-stage discharging negative pressure pump 17, a second two-stage discharging negative pressure pump 27 and a second two-stage discharging negative pressure pump 37 at the end close to the second stirring box.

[0043] In the embodiment, the buffer bins are provided with observation windows 18, 28 and 38.

[0044] In the embodiment, the first stirring box is provided with a stirring shaft 45 driven by a stirring motor 44, the second stirring box is provided with a stirring shaft 55 driven by a stirring motor 54, and the first stirring box and the second stirring box are both provided with a liquid level sensor 60, which is provided with a low liquid level 61, a medium liquid level 62 and a high liquid level 63 sensing position.

[0045] In this embodiment, the device is configured with a touch screen, which is controlled by the PLC control system to control the electrical elements on the diatomite bin 10, cellulose bin 20, white clay bin 30, first mixing box 40 and second mixing box 50 to work.

[0046] The control system of the device can include three modes: jog, manual and automatic.

[0047] The jog mode is to control the mixing box to be added by the suction negative pressure pump by pressing the diatomite or cellulose or white clay addition button.

[0048] In manual mode, the weight of diatomite or cellulose or white clay can be set, and the diatomite or cellulose or white clay addition button is pressed to control the mixing box to be added to the target weight by the suction negative pressure pump.

[0049] In automatic mode, the system automatically controls the automatic addition of oil and soil in the mixing box according to the soil addition process and the formula of diatomite, cellulose and white clay in each process, as well as the liquid level of the mixing box.

[0050] Soil addition weight calculation:

[0051] Each time the diatomite is started, the diatomite addition weight G 硅藻土 is cleared and the initial value of the diatomite bin weight G 硅藻土初始值 is recorded, and after the diatomite addition is completed, the diatomite bin weight is G 硅藻土加土后 , then the diatomite addition weight G 硅藻土 =G 硅藻土初始值 -G 硅藻土加土后 .

[0052] Each time the cellulose is started, the cellulose addition weight G 纤维素 is cleared and the initial value of the cellulose bin weight G 纤维素初始值 is recorded, and after the cellulose addition is completed, the cellulose bin weight is G 纤维素加土后 , then the cellulose addition weight G 纤维素 =G 纤维素初始值 -G 纤维素加土后 .

[0053] Each time the white clay is started, the white clay addition weight G 白土 is cleared and the initial value of the white clay bin weight G 白土初始值 is recorded, and after the white clay addition is completed, the white clay bin weight is G 白土加土后 , then the white clay addition weight G 白土 =G 白土初始值 -G 白土加土后 .

[0054] A control method of an automatic soil addition device of a cold rolling mill plate filter, comprising the following steps:

[0055] (1) First time to add soil: open the first and second stirring tank oil inlet electric valve, start to add rolling oil; when the first and second stirring tank low liquid level sensor, start to add diatomite G1 kg, cellulose X1 kg, white soil B1 kg; when G 硅藻土 =G1, G 纤维素 =X1, G 白土 =B1 and the first and second stirring tank liquid level sensor, close the first and second stirring tank oil inlet electric valve, the first and second stirring tank rolling oil to the plate filter system;

[0056] (2) Second time to add soil: the first and second stirring tank rolling oil to the plate filter system, when the first and second stirring tank low liquid level sensor, open the first and second stirring tank oil inlet electric valve, the first and second stirring tank start to add rolling oil; when the first and second stirring tank medium liquid level sensor, start to add diatomite G2 kg, cellulose X2 kg, white soil B2 kg; when G 硅藻土 =G2, G 纤维素 =X2, G 白土 =B2 and the first and second stirring tank high liquid level sensor, close the first and second stirring tank oil inlet electric valve, the first and second stirring tank rolling oil to the plate filter system;

[0057] (3) Third time to add soil: the first and second stirring tank rolling oil to the plate filter system, when the first and second stirring tank low liquid level sensor, open the first and second stirring tank oil inlet electric valve, the first and second stirring tank start to add rolling oil; when the first and second stirring tank medium liquid level sensor, start to add diatomite G3 kg, cellulose X3 kg, white soil B3 kg; when G 硅藻土 =G3, G 纤维素 =X3, G 白土 =B3 and the first and second stirring tank high liquid level sensor, close the first and second stirring tank oil inlet electric valve, the first and second stirring tank rolling oil to the plate filter system;

[0058] (4) Third time to start, the subsequent automatic soil adding action steps remain unchanged, set the soil adding times according to the actual use requirements, and automatically add soil according to the formula of diatomite, cellulose and white soil each time; when all the soil adding times are completed, the first and second stirring tank rolling oil is pumped to the plate filter system, and when the first and second stirring tank low liquid level sensor, an alarm is prompted to the operator, requesting the plate filter system to be purged, in preparation for the next automatic soil adding.

[0059] In this embodiment, since there is still some soil in the extraction pipeline after each extraction stop, in order to ensure the smooth extraction, the secondary extraction negative pressure pump in the two-stage extraction negative pressure pump is started first to add the residual soil in the extraction pipeline to the mixing box, and after a delay of 10 seconds, the primary extraction negative pressure pump in the two-stage extraction negative pressure pump is started, and the primary extraction negative pressure pump and the secondary extraction negative pressure pump work simultaneously to add the soil in the silo to the first and second mixing boxes.

[0060] In this embodiment, the fourth to seventeenth diatomaceous earth, cellulose, and white clay formulations are as follows:

[0061] The fourth soil addition amount: diatomaceous earth 20 kg, cellulose 2 kg, and white clay 3 kg;

[0062] The fifth soil addition amount: diatomaceous earth 20 kg, cellulose 2 kg, and white clay 3 kg;

[0063] The sixth soil addition amount: diatomaceous earth 20 kg, cellulose 2 kg, and white clay 3 kg;

[0064] The seventh soil addition amount: diatomaceous earth 10 kg, cellulose 2 kg, and white clay 2 kg;

[0065] The eighth soil addition amount: diatomaceous earth 10 kg, cellulose 2 kg, and white clay 2 kg;

[0066] The ninth soil addition amount: diatomaceous earth 10 kg, cellulose 2 kg, and white clay 1 kg;

[0067] The tenth soil addition amount: diatomaceous earth 10 kg, cellulose 2 kg, and white clay 1 kg;

[0068] The eleventh soil addition amount: diatomaceous earth 10 kg, cellulose 2 kg, and white clay 1 kg;

[0069] The twelfth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg;

[0070] The thirteenth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg;

[0071] The fourteenth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg;

[0072] The fifteenth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg;

[0073] The sixteenth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg;

[0074] The seventeenth soil addition amount: diatomaceous earth 0 kg, cellulose 2 kg, and white clay 0 kg.

[0075] The above merely describes the preferred embodiments of the present application, and for those skilled in the art, no creative labor is needed to design a cold rolling mill plate filter automatic soil adding device and its control method in different forms according to the teaching of the present application, and any equivalent changes, modifications, replacements and variations made within the scope of the present application should be included in the scope of the present application.

Claims

1. An automatic dirt loading device for a cold mill plate filter comprising a frame, characterized in that, The rack is provided with diatomite bin, cellulose bin and white clay bin respectively through a weighing sensor, a first stirring box and a second stirring box are arranged on one side of the rack, the lower ends of the diatomite bin, the cellulose bin and the white clay bin are provided with two corresponding material extraction pipelines connected to the first stirring box and the second stirring box, two-stage material extraction negative pressure pumps are arranged on the material extraction pipelines, oil inlet pipes and oil outlet pipes are arranged on the first stirring box and the second stirring box, and oil inlet electric valves are installed on the oil inlet pipes; the device is provided with a touch screen, and the touch screen controls various electrical elements on the diatomite bin, the cellulose bin, the white clay bin, the first stirring box and the second stirring box through a PLC control system to work.

2. An automatic earthenware soil feeding device for a cold rolling mill plate filter according to claim 1, characterized in that, The diatomite bin, the cellulose bin and the white clay bin are connected with the rack through a pair of symmetrical weighing sensors, and the diatomite bin, the cellulose bin and the white clay bin are provided with vibrators.

3. An automatic earthing device for a plate filter of a cold rolling mill according to claim 1 or 2, characterized in that, The lower parts of the diatomite bin, the cellulose bin and the white clay bin are provided with buffer bins, and the buffer bin of the cellulose bin is provided with an auger mechanism driven by an auger motor.

4. An automatic dirt loading device for a plate filter of a cold rolling mill according to claim 3, characterized in that The lower ends of the buffer bins of the diatomite bin, the cellulose bin and the white clay bin are provided with first material extraction pipelines and second material extraction pipelines connected to the first stirring box and the second stirring box, one end of each of the first material extraction pipelines and the second material extraction pipelines connected with the buffer bin is provided with a first-stage material extraction negative pressure pump, and the middle parts of the first material extraction pipelines and the second material extraction pipelines are provided with second-stage material extraction negative pressure pumps.

5. An automatic dirt loading device for a cold mill plate filter according to claim 3, characterized in that An observation window is arranged on the buffer bin.

6. An automatic earthenware filler for a cold rolling mill plate filter according to claim 1, 2 or 4, characterized in that, The first stirring box and the second stirring box are provided with stirring shafts driven by stirring motors, and the first stirring box and the second stirring box are provided with liquid level sensors and low liquid level, middle liquid level and high liquid level sensing positions.

7. A control method of an automatic earth addition device for a cold rolling mill plate filter including the automatic earth addition device for a cold rolling mill plate filter according to claim 6, characterized in that, The method comprises the following steps: (1) First time to add soil: open the first and second stirring box oil inlet electric valve, start to add rolling oil; when the first and second stirring box low liquid level sensor, start to add diatomite G1 kg, cellulose X1 kg, white soil B1 kg; when G 硅藻土 =G1, G 纤维素 =X1, G 白土 =B1 and the first and second stirring box liquid level sensor, close the first and second stirring box oil inlet electric valve, the first and second stirring box in the rolling oil to the plate filter system; (2) Second time add soil: the rolling oil in the first and second stirring tank is pumped to the plate filter system, when the low liquid level of the first and second stirring tank is sensed, the oil inlet electric valve of the first and second stirring tank is opened, and the first and second stirring tank starts to add rolling oil; when the middle liquid level of the first and second stirring tank is sensed, the adding of diatomite G2 kg, cellulose X2 kg and white clay B2 kg is started; when the high liquid level of G 硅藻土 =G2, G 纤维素 =X2, G 白土 =B2 and the first and second stirring tank is sensed, the oil inlet electric valve of the first and second stirring tank is closed, and the rolling oil in the first and second stirring tank is pumped to the plate filter system; (3) Third time add soil: the rolling oil in the first and second stirring tank is pumped to the plate filter system, when the low liquid level of the first and second stirring tank is sensed, the oil inlet electric valve of the first and second stirring tank is opened, the first and second stirring tank starts to add rolling oil; when the middle liquid level of the first and second stirring tank is sensed, the adding of diatomite G 3kg, cellulose X 3kg and white clay B 3kg is started; when G 硅藻土 =G3, G 纤维素 =X3, G 白土 =B3 and the high liquid level of the first and second stirring tank is sensed, the oil inlet electric valve of the first and second stirring tank is closed, the rolling oil in the first and second stirring tank is pumped to the plate filter system; (4) the third time starts, the subsequent automatic soil adding action steps remain unchanged, the soil adding times are set according to the actual use requirements, and the diatomite, cellulose and white clay are automatically added according to the formula each time; when all the soil adding times are completed, the rolling oil in the first and second stirring boxes is extracted to the plate filter system, when the low liquid level of the first and second stirring boxes is sensed, an alarm is given to the operator, and the plate filter system is requested to be purged to prepare for the next automatic soil adding.

8. A control method for an automatic soil addition device for a cold mill plate filter according to claim 7, characterized in that, When the material is extracted each time, the second-stage material extraction negative pressure pump in the two-stage material extraction negative pressure pumps is started first to add the residual soil in the material extraction pipeline to the stirring box, after a delay for several seconds, the first-stage material extraction negative pressure pump in the two-stage material extraction negative pressure pumps is started, and the first-stage material extraction negative pressure pump and the second-stage material extraction negative pressure pump work simultaneously to add the soil in the bin to the first and second stirring boxes.

9. A control method for an automatic earth addition device for a cold mill plate filter according to claim 7 or 8, characterized in that, The diatomite, cellulose and white clay formula from the fourth time to the seventeenth time is as follows: The fourth time soil adding amount: diatomite 20 kg, cellulose 2 kg, white clay 3 kg; The fifth time soil adding amount: diatomite 20 kg, cellulose 2 kg, white clay 3 kg; The sixth time soil adding amount: diatomite 20 kg, cellulose 2 kg, white clay 3 kg; The seventh time soil adding amount: diatomite 10 kg, cellulose 2 kg, white clay 2 kg; The eighth time soil adding amount: diatomite 10 kg, cellulose 2 kg, white clay 2 kg; The ninth time soil adding amount: diatomite 10 kg, cellulose 2 kg, white clay 1 kg; The tenth time to add soil: diatomite 10 kg, cellulose 2 kg, white clay 1 kg; The eleventh time to add soil: diatomite 10 kg, cellulose 2 kg, white clay 1 kg; The twelfth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg; The thirteenth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg; The fourteenth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg; The fifteenth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg; The sixteenth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg; The seventeenth time to add soil: diatomite 0 kg, cellulose 2 kg, white clay 0 kg.

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