CN2842875Y - Speed-changing controller for wet intermittent ball mill - Google Patents

Abstract

The utility model discloses a speed-changing controller for a wet intermittent ball mill, which belongs to the technical field of a ball mill controlling technology. The utility model aims to realize that the rotary speed of the wet intermittent ball mill can be automatically adjusted by the change of ball milling process conditions to ensure the ball mill to operate in high efficiency, the ball milling yield is effectively improved and the electric energy is saved. In order to realize the purposes, a speed-changing controller is connected with the input end of the ball mill; the speed-changing controller is characterized in that a closed loop control system is composed of a frequency converter, a sensor, a ball mill, a motor of the ball mill, a conversion electron card, a CPU controller and a conversion module; relevant control parameters are input into the closed loop control system, after the parameters are analyzed and calculated by the CPU controller, a real-time rotary speed command of the motor of the ball mill is obtained to be output into the frequency converter, and then, the rotary speed of the ball mill is automatically adjusted. The ball mill is always in a high efficiency milling state; thereby, the ball milling time is shortened, the product quality is improved, the yield is increased, the power consumption is saved, and the energy can be saved by more than 10%.

Description

The variable-speed controller that the wet method intermittent ball mill is used

Technical field

The utility model relates to ball mill control technology field, the variable-speed controller that particularly a kind of wet method intermittent ball mill is used.

Background technology

Whether appropriate, the production capacity and the unit electrical power consumed of this ball mill produced a very large impact if being used for its working speed of wet method intermittent ball mill that raw mineral materials pulverizes.Existing ball mill all adopts belt-gear-fluid coupling transmission, generally is to have fixed a kind of constant rotational speed according to the balling drum diameter, and this speed only is applicable to a certain specific operation.When being in process conditions such as different phase when material, the water yield, abrasive body and grinding and changing, ball mill just is not in optimal operational condition.So, a series of problems such as now the ball mill ubiquity yields poorly, the ball milling time is long, power consumption is many.

Summary of the invention

The variable-speed controller that provides a kind of wet method intermittent ball mill to use is provided the purpose of this utility model, makes this drum's speed of rotation change and regulate automatically with the ball-milling technology condition, to guarantee its efficient operation, improve ball milling output effectively, saves energy.

The technical solution that the utility model proposed is such: the variable-speed controller that a kind of wet type intermittent ball mill is used, comprise ball mill 8 and motor 4 thereof, described ball mill input is connected to variable-speed controller, and this controller is formed a closed-loop control system by frequency converter 2, transducer 3, ball mill motor 4, ball mill 8, conversion electron card 9, cpu controller 6 and conversion module 5; The control signal of the instruction that cpu controller 6 sends after conversion module 5 transforms exports frequency converter 2 inputs to, exports rotating speed and the torque that a frequency, voltage, electrical power parameter signals remove to control ball mill motor 4 from frequency converter 2 outputs; Frequency converter 2 exports the electric parameter voltage of these motor 4 load variations of reflection of ball mill motor 4 to, electric current and electrical power are in transducer 3 feeds back to cpu controller 6, the rotating speed of ball mill 8, acceleration and status signal transform back input cpu controller 6 inputs by conversion electron card 9, cpu controller 6 also is connected to input and the display unit 7 that is used to monitor controlled parameter signals and input parameter preset, the parameter preset signal is directly imported cpu controller 6 inputs, carry out the analysis-by-synthesis computing through cpu controller 6 in house softwares, the ball mill motor 4 real-time rotary speed instructions that obtained transform through conversion module 5 and export frequency converter 2 inputs to.

Compared with prior art, the utlity model has following beneficial effect:

(1) owing in the wet method intermittent ball mill, adopted the variable speed ball grinding method, makes the ball milling body adapt to the grinding environment and the material of different nature of continuous variation at any time, and remain at operation under the efficient state the grinding interaction energy of grinding charge material.By automatic detection ball mill load variations all the time, through computing and output ball mill optimum speed instruction in real time, make ball mill be in high efficiency grinding state all the time, thereby shortened the ball milling time, increased output, saved energy consumption, energy-saving effect reaches more than 10%.

(2) owing to adopted the variable speed ball grinding method, the rotating speed of ball mill can be regulated automatically according to the different situations of grinding in the cylinder, make it to adapt with the fragmentation and the required rotating speed of grinding stage of grinding, so, the variable speed ball milling is compared with the fixed rotating speed ball milling, and the product particle particle size distribution of variable speed ball milling narrows down, the corresponding increase of fine particle, thereby improved the ball milling product quality, stable processing technique and reliability are improved.

The utility model can be widely used in the wet method batch (-type) ball-grinding machine of industries such as cement, pottery, chemical industry, mine, metallurgy.

Description of drawings

Fig. 1 is a kind of automatically controlled block diagram of automatic shift control device that is used for the wet method intermittent ball mill of the utility model.

Embodiment

By following embodiment the utility model is further elaborated.

Embodiment

Referring to shown in Figure 1, be connected to variable-speed controller at wet method intermittent ball mill input the balling drum rotating speed is automatically adjusted, this variable-speed controller is formed a closed loop speed adjustment system by frequency converter 2, transducer 3, ball mill motor 4, ball mill 8, conversion electron card 9, cpu controller 6 and conversion module 5.Frequency converter 2 is powered through air switch 1 by external 380V AC power, the control signal of the instruction that cpu controller 6 sends output after conversion module 5 transforms is connected to frequency converter 2 signal input parts, goes to control the rotating speed and the torque of ball mill motor 4 according to certain frequency, voltage, the electrical power parameter signals of these signal frequency conversion device 2 outputs.The electric parameter that frequency converter 2 outputs to these reflection load variations of voltage, electric current and electrical power of ball mill motor 4 feeds back to cpu controller 6 by transducer 3 and analyzes computing; The rotating speed of ball mill 8, acceleration and grinding status signal are sent into cpu controller 6 after being transformed by conversion electron card 9, cpu controller 6 according to the signal of the sensor 3 and conversion electron card 9 feedbacks after the in house software computing, export each best constantly ball mill 8 rotary speed instruction to conversion module 5, outputing signal to frequency converter 2 from conversion module 5 again goes to carry out, realize regulating ball mill 8 rotating speeds in real time automatically, make grinding efficiency the highest and energy-saving and cost-reducing.Cpu controller 6 also is connected to input and display unit 7, can monitor and import our parameters needed by it.

Concrete parameter of this example and comparative test result are as follows:

Be applied in 14T wet method intermittent ball mill, its motor rated power is 90KW.

When (1) adopting conventional permanent rotating speed mode, the ball milling time average is 13.5 hours/every ball, electricity consumption 819 degree (kwh).

When (2) adopting the fluid drive mode, the ball milling time average is 12.8 hours/every ball, electricity consumption 654 degree (kwh).

Both compare, electrical energy saving: $\frac{819-654}{819}\×100\%=20.15\%.$

Saving ball milling time: 13.5-12.8=0.7 (hour/every ball).

Through check, adopt the product of above-mentioned automatic variable speed mode ball milling, the thinner particle proportion of its fineness is than the increase of constant speed ball milling method, improved powder quality, and then to make with this powder be that the technology stability and the reliability of the subsequent handling of raw material is improved, thereby produce bigger indirect economic effect.

Claims (1)

1, the variable-speed controller used of a kind of wet method intermittent ball mill, comprise ball mill (8) and motor (4) thereof, it is characterized in that: described ball mill input is connected to variable-speed controller, and this controller is formed a closed-loop control system by frequency converter (2), transducer (3), ball mill motor (4), ball mill (8), conversion electron card (9), cpu controller (6) and conversion module (5); The control signal of the instruction that cpu controller (6) sends after conversion module (5) transforms exports frequency converter (2) input to, exports rotating speed and the torque that a frequency, voltage, electrical power parameter signals remove to control ball mill motor (4) from frequency converter (2) output; Frequency converter (2) exports the electric parameter voltage of this motor of reflection (4) load variations of ball mill motor (4) to, electric current and electrical power are in transducer (3) feeds back to cpu controller (6), the rotating speed of ball mill (8), acceleration and status signal transform back input cpu controller (6) input by conversion electron card (9), cpu controller (6) also is connected to input and the display unit (7) that is used to monitor controlled parameter signals and input parameter preset, the parameter preset signal is directly imported cpu controller (6) input, carry out the analysis-by-synthesis computing through cpu controller (6) in house software, the ball mill motor (4) that is obtained rotary speed instruction in real time exports frequency converter (2) input to through conversion module (5) conversion.

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