JPH0659797U - Switch abnormality detection device for grain dryer - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the malfunction of the switch abnormality alarm device during the initial check of the operation switch. In the operation switch monitoring means 47, if the operation switches 48 to 51 are turned off within an arbitrary time, an operation start signal is output to the drive device 42, and the operation switches 48 to 51 should be turned on even after an arbitrary time has elapsed. For example, a switch abnormality signal is output to the alarm device 43.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch abnormality detecting device for a grain dryer, which prevents malfunction of a switch abnormality alarm device at the time of initial checking of operation switches.

[0002]

[Prior art]

 In conventional grain dryers, multiple operation switches are installed on the operation panel mounted on the front of the grain dryer to operate the drive devices that drive the heat generator, suction / exhaust air blower, conveyor, etc. . The operation switch is, for example, a pull-in switch when pouring grains into the tempering chamber, a drying switch when starting drying, and a discharge switch when discharging dried grains to the outside of the machine. Turn it on to activate the drive device that drives the heat generator. By the way, the grain dryer usually operates only when the grain is harvested, and is stored in the workplace for the rest of the period. During this storage, the dust in the workplace entered the inside of the operation panel, and the dust adhered to the contact part of the operation switch, resulting in poor contact, often resulting in a short circuit. When the power of the dryer is turned on in this state, for example, if the discharge switch is short-circuited even when trying to load the grain, the drive for discharging is started and the grain cannot be loaded. Therefore, check whether the operation switch is normal or abnormal (if it is normal, the operation switch is short-circuited only when it is pressed, and if it is abnormal, it is always short-circuited), and if it is abnormal, an alarm is issued. The switch abnormality detecting device will be described below with reference to the flowchart of FIG.

In step 201, the power of the operation panel is turned on, and in step 202, an initial check of operation switches is started. In step 203, it is judged whether or not the operation switch is in the ON state, and if it is OFF (the operation switch is not short-circuited), in step 204, the operation designated by the operation switch is started and turned ON (the operation switch is short-circuited). In step 205, the switch abnormality alarm device is activated.

[0004]

[Problems to be solved by the device]

 However, in the conventional switch abnormality detecting device, when the operator turns on the operation switch immediately after turning on the power, the operation switch is initially checked at that time, so that the operation switch is abnormal (short-circuit). However, there is a drawback that the switch abnormality alarm device is mistakenly activated.

The present invention solves the above-mentioned drawbacks of the conventional device and provides a switch abnormality detecting device for a grain dryer that prevents malfunction of the switch abnormality alarm device at the initial check of the operation switch. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 A tempering chamber is provided in the upper part of the dryer body, and a ventilation drying part in which a drying chamber, a hot air chamber, and an exhaust air chamber are arranged in parallel is provided in the lower part of the dryer body, and a heat generator is provided in the hot air chamber. In the grain dryer in which the suction and exhaust fans are connected to each other, the operation switch that operates the drive device that drives the heat generator and the suction and discharge machine, and the operation start signal is driven if the operation switch is OFF. If the operation switch is turned on, the operation switch initial check means outputs a monitoring signal to the operation switch monitoring means, and if the operation switch is turned off within an arbitrary time, an operation start signal is output to the drive device. If the operation switch is ON even after a lapse of time, an operation switch monitoring means for outputting a switch error signal to the alarm device constitutes a switch error detection device for the grain dryer.

[0007]

[Action]

 When the grain put into the grain dryer's tempering chamber flows down in the drying chamber, it is dried by the heat generated by the heat generator and the suction / exhaust fan and dried by the dry air passing through the drying chamber. The wind is discharged outside the machine by the suction and exhaust machine. In this grain dryer, when the power is turned on, the operation switch initial check is performed. In the initial check of the operation switch, if the operation switch is OFF, the drying operation is started, and if the operation switch is ON, the operation switch is monitored. In operation switch monitoring, if the operation switch is turned off within an arbitrary time, the operation specified by the operation switch is started, and if the operation switch is turned on even after an arbitrary time has elapsed, a switch abnormality alarm is activated. It

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a partial front sectional view of a circulating grain dryer, Fig. 2 is a horizontal sectional view of a circulating grain dryer, Fig. 3 is a block diagram of a switch abnormality detecting device, and Fig. 4 is a flowchart of a switch abnormality detecting device. 5 is a functional block diagram, and FIG. 6 is a front view of the operation panel.

Reference numeral 1 is a circulation type grain dryer, in which a tempering chamber 2 is provided at an upper portion and a ventilation drying unit 3 is provided at a lower portion, and a fried grain machine 4 is erected on one side thereof to perform a circulation grain drying process. To form. In the ventilation drying section 3, a drying chamber 5, which is formed of a porous wall plate, a hot air chamber 6 and an exhaust chamber 7 are provided side by side, and the upper part of each drying chamber 5 communicates with the tempering chamber 2. The lower part of the drying chamber 5 is connected to the grain flow-down passage 8 and a discharge valve 9 is provided at its discharge port. 10 is a grain collecting gutter, and a lower carrier 11 is provided at the bottom thereof, and the lower carrier 11 communicates with the tempering chamber 2 via the grain elevator 4, the upper carrier 12, and the operation panel 13.

A belt 16 having a large number of buckets 15 attached thereto is provided between upper and lower pulleys 17 in a conveyor case 14 of the grain elevator 4, and an opening 18 at an upper end of the grain elevator 4 is a downflow gutter 19. The upper conveyer 12 is connected to the upper conveyer 12, and 20 is a motor for driving the grain elevator.

A plan for collecting return grains from the bucket 15 is provided between the belts 16 and 16 of the grain elevator 4 in an inclined manner, and the guide plate 21 is provided to the moisture measuring device 23 via the supply cylinder 22. The moisture measuring device 23 communicates with the lower opening (not shown) of the belt conveyor case 14 via the discharge gutter 24 and the return gutter 25.

As shown in FIG. 2, the air inlets 27 are opened at the boundary surfaces of the front wall 26 with the ends of the hot air chambers 6, and on the other hand, at the boundary surfaces with the exhaust chambers 7 of the rear wall 28. Opens each of the exhaust ports 29. The front wall 26 is provided with an air supply box 30, the rear wall 28 is provided with a fan box 31, the opening 32 of the air supply box 30 is provided with a burner box 34 having a built-in burner 33, and the opening 35 of the fan box 31 is provided. A suction / exhaust air blower 37 having a suction fan 36 mounted therein is arranged therein. Reference numeral 38 is a wind pressure sensor that operates by the static pressure of the suction air, and supplies the fuel to the burner 33 when the pressure of the suction air suddenly drops during the drying operation due to, for example, a breakage of the belt of the suction / exhaust fan 37. It is a safety device for stopping.

FIG. 3 is a block diagram of the switch abnormality detecting device. The operation switches such as the swelling switch 48, the drying switch 49, the discharge switch 50, and the stop switch 51 are variously operated through the input circuit 40 of the control device 39. The CPU 41 for calculating the input value is informed, and the various drive devices 42 for operating the burner 33, the suction / exhaust fan 37, etc., and the alarm device 43 for generating a buzzer sound are informed to the CPU via the output circuit 44.

FIG. 6 shows an operation panel 45 attached to a front side plate of the grain dryer 1, and a stake switch 48, a drying switch 49, a discharge switch 50 and a stop switch 51 are arranged on the operation panel 45. A power switch 52 is provided below the operation panel 45. Reference numeral 53 is a display window, and 54 is a buzzer stop switch.

In the functional block diagram of FIG. 5, 46 is an operation switch initial check means, and 47 is an operation switch monitoring means.

Next, the operation of the above configuration will be described. Grains (for example, paddy) supplied to a hopper (not shown) are lifted by the grain lifting machine 4 and passed through the upper transporter 12 and are evenly scattered from the scattering plate 13 into the tempering chamber 2. Are deposited. When the burner 33 and the suction / exhaust fan 37 are operated to rotate the discharge valve 9, the grain in the tempering chamber 2 flows down in the drying chamber 5. The dry air blown by the burner 33 and the suction / exhaust fan 37 flows into the hot air chamber 6 through the opening 32, the air supply box 30, and the air supply port 27, and moves laterally from the hot air chamber 6 to the air exhaust chamber 7. Grains flowing down in the drying chamber 5 are dried by the drying air flowing to the. The dry air, which has become high humidity by drying the grains, is discharged from the air exhaust chamber 7 through the air exhaust port 29, the fan box 31, and the opening 35 by the rotation of the suction fan 36 of the suction air exhaust device 37. .

The grain dried by the dry air flows down the grain flow path 8 and is intermittently discharged by the discharge valve 9. The discharged grain flows down through the grain collecting trough 10 and is sent to the grain fried machine 4 by the lower carrier 11 and is put into the tempering chamber 2 again, and is circulated and dried until the moisture measuring device 21 detects a predetermined moisture. To be done.

Grains that are lifted by the grain lifting machine 4 spill from the bucket 15 between the belts 16 and 16 due to vibration during transportation and discharge to the downflow gutter 19. The spilled grain is collected by the guide plate 21, flows down from the guide plate 21 through the supply cylinder 22 and is supplied to the moisture measuring device 23, and the moisture of the grain is measured. The grain whose moisture has been measured is discharged from the moisture measuring device 23, flows down the discharge gutter 24, and is supplied from the return gutter 25 to the lower part of the conveyor case 14.

Next, the operation of the switch abnormality detecting device will be described with reference to the flowchart of FIG. In step 101, the power supply 52 of the operation panel 45 is turned on, and in step 102, the operation switch initial check is started. By the way, when the operation switches 48 to 51 are turned on during this operation switch initial check time, first, at step 103, it is determined whether or not the operation switches 48 to 51 are in the on state, and it is determined that they are off. In step 104, the operation designated by each operation switch 48 to 50 is started by each drive device 42 (the operation is not started even if the stop switch 51 is OFF), and If there is a switch that is ON at step 105, the process proceeds to step 105, and the switch that is ON (for example, the stretch switch 48) is monitored. In step 106, it is judged whether the pull-in switch 48 is ON or OFF for an arbitrary time (for example, 3 seconds), and if it is OFF, the process proceeds to step 104 and the operation designated by each operation switch 48 to 50 is performed by each drive device 42. If it is ON, it proceeds to step 107 and it is judged whether or not an arbitrary time has elapsed. If the arbitrary time has not elapsed, the routine returns to step 105, and it is judged again whether the squeeze switch 48 is ON or OFF. If the arbitrary time has elapsed, it is judged that the squeeze switch 48 is abnormal (short). Then, in step 108, the alarm device 42 activates the switch abnormality alarm buzzer, and an abnormality is displayed on the display window 53. The buzzer sound generated by the alarm device 43 can be stopped by pressing the buzzer stop switch 54.

Conventionally, when an operator turns on the operation switch immediately after turning on the power, an initial check of the operation switch is performed at that time. Therefore, the operation switch is determined to be abnormal (short), and the switch is determined to be abnormal. The alarm system was activated by mistake. However, in the switch abnormality detecting device of the present invention, the operation switch monitoring means is provided to monitor ON / OFF of the operation switch for an arbitrary time. Thereby, if the operation switch is normal, the operation switch is turned off within an arbitrary time, and the operation specified by the operation switch can be started. Therefore, even if the operation switch is turned on within the initial check time of the operation switch, the operation switch is not considered to be abnormal (short-circuit) and the switch abnormality alarm device is not accidentally activated.

[0021]

[Effect of device]

 According to the switch abnormality detection device of the present invention, if the operation switch is turned off within an arbitrary time, an operation start signal is output to the drive device, and if the operation switch is turned on even after an arbitrary time elapses, the switch abnormality signal is output. If the operation switch is normal, the operation switch is turned off and the operation specified by the operation switch can be started if the operation switch is normal. . Therefore, even if the operation switch is turned on within the initial check time of the operation switch, the operation error switch is not judged to be abnormal (short circuit) and the switch error alarm device is not operated by mistake.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a circulation type grain dryer.

FIG. 2 is a cross-sectional view of a circulating grain dryer.

FIG. 3 is a block diagram of a wind pressure abnormality detection device.

FIG. 4 is a flowchart of a wind pressure abnormality detection device.

FIG. 5 is a functional block diagram.

FIG. 6 is a front view of the operation panel.

FIG. 7 is a flowchart of a conventional switch abnormality detection device.

[Explanation of symbols]

 1 Circulating Grain Dryer 2 Conditioning Room 3 Ventilation Drying Section 4 Grain Lifting Machine 5 Drying Room 6 Hot Air Room 7 Exhaust Chamber 8 Grain Downflow Path 9 Discharge Valve 10 Grain Gutter 11 Lower Conveyor 12 Upper Conveyor 13 Scatterer 14 Conveyor case 15 Bucket 16 Belt 17 Pulley 18 Opening 19 Downflow gutter 20 Motor for driving grain elevator 21 Guide plate 22 Supply tube 23 Moisture measuring device 24 Discharge gutter 25 Return gutter 26 Front wall 27 Air supply port 28 Rear wall 29 Exhaust port 30 Air supply box 31 Fan box 32 Opening part 33 Burner 34 Burner box 35 Opening part 36 Suction fan 37 Suction / exhaust fan 38 Wind pressure sensor 39 Control device 40 Input circuit 41 CPU 42 Drive device 43 Alarm device 44 Output circuit 45 Operation panel 46 Operation switch Initial check means 47 Operation switch monitoring means 48 Strain switch 4 Drying switch 50 ejection switch 51 Stop switch 52 power switch 53 the display window 54 buzzer stop switch

Claims (1)

[Scope of utility model registration request] 1. A tempering chamber is provided in an upper part of the dryer body, and a ventilation drying section in which a drying chamber, a hot air chamber and an exhaust air chamber are arranged side by side is provided in the lower part of the dryer body, and a heat generator is provided in the hot air chamber. In a grain dryer in which a suction / exhaust fan is connected to the air exhaust chamber, an operation switch for operating a drive device that drives the heat generator, the suction / exhaust air device, and the like, and start operation if the operation switch is OFF Operation switch initial check means for outputting a signal to the drive device and outputting a monitoring signal to the operation switch monitoring means if the operation switch is ON,
An operation switch monitoring means for outputting an operation start signal to the drive device if the operation switch is turned off within an arbitrary time, and outputting a switch abnormality signal to the alarm device if the operation switch is turned on even after an arbitrary time has elapsed. A switch abnormality detecting device for a grain dryer, which is characterized by comprising: