JPS59170677A - Method of determining timing of check of information from various safety sensor mounted to cereal drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to grain dryers, and more particularly to a method for determining when to check various safety sensors provided in a dryer.

In grain driers, there are generally four operating modes: loading the grain to be dried into the grain dryer, discharging the grain from the dryer, ventilation drying, and drying by combustion. The grains to be dried are discharged from the stack and are ventilated by driving only the drive system of the dryer. Loading of grains to be dried is carried out by driving the elevator motor, upper helix, and diffusion equipment in the drive system of the dryer, and discharge is carried out by driving the rotary valve and lower helix, and ventilation is carried out by driving the rotary valve and lower helix. Drying is carried out by driving the entire drive system of the grain dryer to circulate the grains to be dried within the dryer, and by drawing in outside air by rotating the fan motor. Further, drying associated with combustion is performed by driving the combustion system (ignition heater, fuel supply pump, etc.) in addition to these.

In order to properly carry out the four types of work mentioned above, overload detection thermal relays, paddy clogging sensors, operating pressure sensors 4 no, burnout sensors, flame sensors, and overheating sensors are installed on valves, fans, elevator drive motors, etc. Detection sensor'fJ
(thermostat 1~) is installed in the grain dryer as a safety sensor. These send sensor information to the CPU when driving the drive system and/or combustion system of the grain dryer.

In conventional grain dryers, information from all safety sensors is checked in any of the four operating modes mentioned above, and if an abnormality occurs in one of the four scales, all drives are shut down. It was configured to look like it was parked. Therefore, for example, when performing ventilation drying, the safety sensor information for the combustion system is detected and the dryer stops operating if an abnormality is determined, and ventilation drying occurs even though other sensor information indicates normality. Therefore, the present invention aims to improve the above-mentioned problems of the conventional technology, and its purpose is to change the sensor that should be checked depending on the operating mode of the grain dryer according to the operating mode. By limiting it to what is necessary, information from various safety sensors installed in the grain dryer can be used to enable the operation mode to be executed even if there is an abnormality in the information provided. The purpose of the present invention is to provide a method for determining the check timing.

The feature of the present invention for achieving the object described in item 1 is to provide a grain dryer that performs various safety measures related to the combustion system and drive system, such as loading work, drying work, and ventilation drying. When performing work or tJl output work, the grain dryer is installed such that only information from safety sensors directly related to the work being performed is taken in, and according to this information the work is continued or stopped. - There is a method to determine when to check various safety sensor information. The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram of an apparatus according to an embodiment of the method of the present invention, and FIG. 2 shows features 1 to 1 of the configuration of FIG.

In FIG. 1, reference number 1 is a microcomputer, which includes a CPU 101, a memory 102, and an input port (A
), incoming capo-1 to (B), outgoing capo-1 to (C), outgoing capo-1-(D), and outgoing capo-1-(E>).

The CPU 101 performs arithmetic and logical operations and comparison operations.

The input information of CI) U 101 is given to the f-signal input circuit 2, the input port (Δ), and the analog input circuit 3 to the input horn board 1 (B).

3- To CP LJ 101 via digital input circuit 2'
The information that can be uploaded includes, for example, operation information 10 for the ignition switch that drives the combustion system of the dryer, drying target temperature (1-
There is grain information 11 such as the amount of rice and grain type required to set c), and safety sensor information 9 input from a group of sensors related to the drive system and a group of sensors related to the combustion system. As described above, the safety sensor group is roughly divided into a sensor group related to the drive system and a sensor group related to the combustion system.

Sensors related to the drive system include wind pressure sensors, rice clog sensors, valves, overload detection thermal relays installed in drive motors such as elevators and fans, and sensors related to the combustion system include overload detection thermal relays installed in drive motors such as valves, elevators, and fans. There is a sensor, a flame sensor and an overheat sensor (to thermostat 1).

The working pressure sensor inputs this to the CP LJ 101 as abnormality information when the outside air pressure falls below a certain value during drying operation by combustion and ventilation drying operation, and the paddy clogging sensor inputs this to the CP LJ 101 as mentioned above. When the rice is clogged with paddy, this is input to the CPU UL 01 as abnormality information. The abnormality information from the paddy rice sensor 1) is sent by the CPU 101 as an operation command signal to the pressure switch. The abnormality information is input to CP LJlol.The fuel exhaustion sensor detects fuel exhaustion, the flame sensor →) detects whether or not the burner is ignited, and the overheat detection sensor (to thermostat 1) detects the hot air chamber and burner section. Detect abnormal heating. The CP Lllol determines an abnormality based on the sensor information 9 and sends a command to stop the dryer drive motor and/or the combustion system F. CP LJ 101
calculates the drying target temperature (Tc) based on the grain information 11 and the outside air temperature (TA) taken in through the input port (B). The input capo-1-(B) receives the actual temperature inside the dryer (TB) and the outside air temperature (T
A) is given to the CPU 101. , cpulol alternately changes the actual temperature (T
B) and outside air temperature (TA >), outside air temperature (TA
) corrected target temperature (T-c) and actual temperature (TB)
A comparison is made between the two and the burner combustion is controlled. CPI
The display output of Jlol is sent to the display device 4 through the output port (C), and the display device 4 displays the actual temperature inside the dryer, the current grain moisture value, etc. based on this. From the output port (D>, Δn,
/off command (i) is issued, and the dryer drive system, ignition heater (F l-1), and fuel supply pump (S
), etc., of the combustion system 8 are performed. Out capo-1-
The output of (") is given to the valve drive circuit 5, and according to the comparison between the actual temperature (T8) and the reference temperature (Tc), CP L
Driven by the fuel valve 1 control information outputted from the valve J'101, the 31st fuel supply electromagnetic valve (V) 6 is controlled to open and close.

The memory 102 contains a control program and the like, and also stores necessary data.

The control operation of the above configuration will be explained below using flowcharts 1 to 71 in FIG.

When drying operation information is input to the grain dryer by the operator, it is transmitted as operation information 10 through the digital output circuit 2 and the input port 〈△) -UC1)U101
T-ko! −j can be obtained. The CPU 101 uses the operation information]
0, it is recognized that the drying operation information has been given, and a drive command is sent to the drive system and combustion system 8 via the output port (D) and the digital output circuit 7 (step 20). In step 20, the general drying operation information is cpu"+
Unless oi is reached, the dryer will enter drying operation (step 21). Next, CI) U 101
Then, the pump (SP) that supplies fuel to the combustion system 8, the fuel supply solenoid valve (FV) 6, and the heater (Fl-1) are turned on (step 22), and the process moves to check the sensor information described below. . The CPU 101 takes in the information sent from the overheating detection sensor (Reemost I~), flame sensor, and fuel exhaustion sensor related to the combustion system from the safety sensor information 9, and checks for abnormalities according to the information. (Step 23). CPU101
] After completing the check with Tube 23, if it is determined that the information sent from the above sensor is not safe,
The process moves to the next step 725 (step 24), but C
When the PU 101 recognizes an abnormality in any one of the above sensor information = 7-, output capo-1- (D>) sends a command signal to the combustion system 8 to stop the drive via the digital output circuit 7. In addition to controlling the drive (step 32), the drive i1+ of the drive system 8 is also controlled after a predetermined period of time (for example, 5 minutes/seconds) rI'f has elapsed (step 33). The reason why there is a time lag between step 32 and transition to the start step 33 is to ensure the safety of noise during operation of the dryer, so the drive system 8 is driven for a certain period of time, the burner is cooled, and then the operation is stopped. This is to do so. If no abnormality is found in step 24, the process moves to step 25.
The flow from 5 onwards checks only the sensor information related to the drive system 8. The CP LJ 101 calls information detected by the wind pressure sensor 4 from among the sensor information related to the drive system 8 and identifies the presence or absence of an abnormality. As mentioned above, the wind pressure sensor sends out abnormality information when the wind pressure of the outside air taken in from outside the machine does not reach a certain value, and is also a necessary sensor to prevent grain stuffiness. Step 25
). Next, the CPU 101 takes in the information detected by the thermal relay (OCRM V) installed in the valve motor and the overload detection 8-thermal relay (OCRM V) and determines whether or not there is an abnormality. moves to the next step (step 26).Next, the CPU 101 detects the overload detection provided in the fan motor → normal restart (OCRMF).
And the information detected by the overload detection thermal relay (OCRM F ) provided in the elevator motor is taken in to determine whether there is an abnormality.

If it is determined that there is no abnormality, the drying operation by combustion will continue. Note that in step 25, CP
Once LJlol recognizes the abnormality, it moves to step 34 and completely stops the operation of the dryer. The same applies to steps 26 and 27.

As long as the dryer is performing drying operation by normal combustion, the flow described above is checked by CI) tJ 101 to see if it is normal, with each 10 seconds being one cycle. If CP j, J 101 is step 20
After the drying operation information is given at step 21, ventilation drying operation information is newly given at the output port (D),
A command signal to stop the drive F is sent to the combustion system 8 via the digital output circuit 7. Therefore, the dryer has a drive system of 8
Since only the CPUs 1, 2, and 3 are put into the driving state and ventilation drying operation is performed (step 21), the process immediately moves to step 25, and as described below, the CPU 1...
01 will no longer be checked for combustion system sensor information.

Further, in step 20, the drying operation information is sent to the CPU 101.
If I is not satisfied, the combustion system 8 will not be driven and only the drive system 8 will be in the driving state, and the process will proceed to step 28. C
In step 28, the PU 101 recognizes the existence of information regarding the grain discharge operation based on the provided operation information 10.
), output capos 1 to (D), and output command signals to drive the fan motor (MF), elevator motor (ME), and valve motor (MV) of the drive system 8 through the digital output circuit 7 to the dryer. A discharge operation is performed.

Therefore, during the discharge operation of the dryer, only the child chain drive devices are driven (step 29), so it is only necessary to check the sensor information related to these, and the CPU 101
It is sufficient to determine whether there is an abnormality in each case in steps 26 and 27. CPU1 at step 28
If no operation information related to the ejection operation is given to 01, it is determined whether operation information 10 indicating a tensioning operation is provided (step 30). When the CPU 101 recognizes this, it controls the fan motor (MF) and elevator motor (ME).
Issue a command to turn on the drive switch (step 31)
At the same time, the process moves to step 27. Again, CPU1
If it is determined that no loading operation information has been given based on 01, it means that the dryer's power switch has simply been turned on, and the safety sensor group is not checked at all. Therefore, during drying operation, overheat detection sensor (thermostat) information, flame sensor information, fuel-out sensor information, wind pressure sensor information, paddy clogging sensor information,
All the sensor information given from overload detection thermal relays installed on drive motors of valves, elevators, fans, etc. is checked, and during ventilation drying operation, wind pressure sensor information, paddy clogging sensor information, and the above information are checked. The sensor information given from the three thermal relays is sent to the paddy clogging sensor information and the sensor information given from the above three thermal relays during the discharging operation, and to the drive motors of fans and elevators during the loading operation. Sensor information given from the provided overload detection thermal relay will be checked by the CPU 101.

Since the sensor information to be checked depending on the drying mode of operation is limited to that necessary for that mode of operation, it is possible to execute that mode of operation even if there is an abnormality in sensor information unrelated to the mode of operation. It is possible to provide a method for determining when to check various safety sensor information.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart of the configuration shown in FIG. 1. Micro combi coater 2, digital input circuit 12-3, analog input circuit 5, valve drive circuit 6. Fuel supply solenoid valve 7, digital output circuit 8, drive system and combustion system 9, safety sensor information 10. Operation information 12, dryer internal temperature (TB) and outside air temperature (TA) Patent applicant Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] In grain dryers that have various safety sensors related to the combustion system and drive system, when carrying out loading work, drying work, ventilation drying work, or discharge work, the safety sensors directly related to the work being carried out must be A method for determining when to check information from various safety sensors installed in a grain dryer, characterized by taking in only information and continuing or stopping the work according to this information.