Controller special for two-section fire grain drier with multi-protection function

Abstract

The invention discloses a controller special for a two-section fire grain drier with a multi-protection function. The controller comprises a programmable controller, a temperature sensor module, a touch screen and a moisture meter, wherein the programmable controller serves as a control host machine; a program control module is arranged in the programmable controller; the programmable controller controls the action of each part of the drier; a two-section fire combustor is adopted to heat; a temperature sensor is adopted to collect the temperature of hot air and the temperature of grains; the moisture meter is adopted to detect the moisture of the grains; the touch screen is adopted to set operation parameters, monitor the temperature and the operation state of the drier and timely display the abnormal information of the drier equipment. Different heating ways can be selected according to different grain drying requirements, so that a grain drying process is scientific and reasonable. The controller also has the functions of detecting overload protection of a motor, oil-lacking protection of an oil tank, slipping of a belt of a lifter and the like. The controller has the characteristics of high reliability, long service life, convenience in operation and maintenance, complete protection function and the like.

Description

technical field [0001] The invention relates to a controller, in particular to a special controller for a double-stage fire grain dryer. Background technique [0002] The grain dryer is used for grain drying and is an important machine for the development of modern agriculture. The structure of the grain dryer is relatively complicated. With the improvement of the use requirements, the functions are more and more, so the control system of the grain dryer is also relatively complicated. The control system of the grain dryer in the prior art basically adopts the control mode of contactor, temperature control instrument or single-chip microcomputer, and uses the control single-stage fire burner to provide heat for the dryer. The components used in this control system are simple and the manufacturing cost is low. , but there are many deficiencies in the application of this control system: [0003] 1. Low reliability, large amount of maintenance, and high maintenance cost: high...

AI Technical Summary

Problems solved by technology

[0003]1. Low reliability, large amount of maintenance, and high maintenance cost: high electrical faults, short life, poor stability, resulting in large amount of maintenance and high maintenance cost;

[0004]2. Equipment operation and use are inconvenient: for data setting and display, only the buttons on the controller operation panel and the LCD display can be used to complete the data setting It is very inconvenient for users to operate and use;

[0005]3. It is inconvenient to find faults and maintain: the circuit of contactor and single-chip microcomputer control system is complicated, so it is inconvenient to find faults and maintain;

[0006]4. The function is not perfect, there is no oil tank protection and hoist belt slipping detection function, the protection is not in place

The fuel in the burner of the dryer is often used as both fuel and lubrication. Once there is no fuel shortage, the oil pump will still rotate at a high speed due to the lack of fuel tank protection function. Loss; the elevator of the dryer often slips when the lower auger feeds too much material or the elevator belt stretches and becomes longer after a period of use, resulting in the failure of the grain to circulate

Since the control system of the grain dryer in the prior art does not have the detection function of the belt slip of the hoist, it often fails to detect in time when the belt of the hoist is slipping, and shut down in time, resulting in a material blocking accident, resulting in the grain dryer not working normally;

[0007]5. The temperature control method is single, the grain is heated unevenly, and the grain bursting rate is high

During this period, there is often a gap of about 10 seconds. Obviously, the grains flowing to the heating place during this period are not heated, and the temperature of the grains heated in the previous period is unbalanced. This will easily cause the loss of moisture in the grains. The moisture may be high or low, and the error of moisture control accuracy is large, which is obviously not applicable to occasions requiring high moisture accuracy; The rise is very fast, the moisture on the surface of the grain is lost quickly, and the moisture inside the grain is lost slowly, so that the uneven heating of each part of the grain and the transfer of water will produce a force, resulting in an increase in the rate of grain bursting

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