JPS5838388Y2 - Grain dryer conveyance control device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a conveyance control device for a grain dryer.

In the grain circulation process of a grain dryer, the amount of grain flowing on the drying section machine side and the amount of grain lifted on the elevator side are determined by the amount of grain mixed in raw material paddy that adheres to or gets caught in the rotating parts provided in each section of the circulation process. As soon as the rice grains dry, the balance is lost, and the excess rice grains stay and accumulate in the connecting conveyance section between the elevator and the drying section body, resulting in damaged grains such as broken rice and dehulled flakes.

Conventionally, in this type of conveyance control device, an opening/closing lid equipped with an elastic part is attached to an opening window opened on the bottom wall of the supply gutter in a feed gutter installed at the bottom of an elevator in the grain circulation process. The control device described in Japanese Patent Publication No. 47-49270, in which the opening/closing lid is opened by the grain pressure to discharge the grains and a switch is activated, or the lid body attached to the upper wall of the supply gutter is rotated in the vertical direction. There are known control devices such as those described in Japanese Utility Model Publication No. 54-20379, in which a movable piece that moves is pivoted and a switch is actuated by pushing up the movable piece by grain pressure in a supply gutter. Since the control operating parts such as the elastic part of the opening/closing lid or the movable piece of the lid body and each switch part are provided to be exposed outside the machine, there is no possibility that objects, etc. may come into contact with the operating parts and cause damage and malfunction. In addition, grains and dust scattered during drying work, or excess grains released in the bath, adhere to or stick to the control operating section, often causing malfunctions.

In addition, there is a known example of a device that attaches a mercury switch to the lid of the supply gutter of the elevator, but from a safety standpoint, the mercury switch is not suitable for use, considering the risk of it breaking and coming into contact with grain or the human body. This is a matter of concern.

The present invention solves the above-mentioned drawbacks of the conventional device, prevents the generation of damaged grains such as broken rice and dehulled flakes that occur in the connected conveyance section of the dryer, and easily eliminates excess grains in the connected conveyance section. An object of the present invention is to provide a conveyance control device that ensures safe operation of grain circulation processes.

The present invention will be explained with reference to embodiment figures.

Reference number 1 in the figure indicates a hot air chamber 2, a grain flow path 3,
3. A drying section fuselage in which the ventilation drying section is formed by arranging ventilation chambers 4, 4 in parallel, and a flowing grain tank 5 is arranged below the ventilation drying section.
The machine body 1 is a circulating grain dryer in which a grain tank 6 is mounted on the upper part and an elevator 7 is installed upright on one side of the machine to form a grain circulation path A.

Next, referring to the grain circulation process A, a grain distribution plate 8 is rotatably suspended from an opening provided in the center of the upper wall of the grain tank 6 provided at the top of the machine body 1, and the grain distribution The board 8 and the upper discharge port of the elevator 7 are connected by a conveyor 9, and the lower part of the grain tank 6 is connected to grain passages 3, 3 formed by porous walls on both sides, and the hot air chamber 2
The drying hot air passes laterally through the grain layer formed in the channels 3, 3 and flows out into the exhaust chambers 4, 4, respectively, while drying the grains. The grains intermittently flowed into the grain tank 5 by rotating the discharge valves 10°10 provided at the lower end of each channel 3, 3, and the grains in the grain tank 5 were placed horizontally at the bottom of the tank. The grains are transported laterally by the transporting screw conveyor 11 and flow into the elevator 7 through a connecting transport section consisting of an extended connection section 12 of the conveyor 11 and a grain feeding opening section 13 provided on the lower side of the elevator 7. .

The grains that have flowed into the elevator 7 are fried by the rotation of the packet conveyor, and are returned to the grain tank 6 via the transport conveyor 9 and the grain distribution disk 8, where they are tempered.

In this way, the so-called circulating tempering drying process is repeated several times to temper the grain to a predetermined moisture content before being taken out of the machine.

Next, each rotating part of the grain circulation process A is a grain distribution plate 8.
, conveyor 9, discharge valve 10, conveyor screw conveyor 11. The packet conveyor and the like of the elevator 7 are connected in relation to each other by a rotation transmission means 15 such as a pulley, a gear, a crank mechanism 14, etc., and the transmission means 15 is connected to a driving electric motor 16 so that they rotate in conjunction with each other. It's a formality.

Next, the conveyance control device of the present invention provides a push-up blade on the upper wall surface 12A or 13A of the machine frame of the extension connecting part 12 of the conveying Sukunoyukobear 11 or the grain feeding port part 13 by a change in the layer height of the fluidized paddy inside the machine frame. An on-off valve 17 that opens and closes with a switch is provided on the upper wall surface of the on-off valve 17, and an elastic inclined plate 19 whose one end is a free end, a switch box 20 that includes a floating trochanter 18 and control operating parts such as a switch 22 is provided. is installed, and inside the box 20, an elastic inclined plate 19 made of a leaf spring or the like is provided obliquely upwardly protruding from a pedestal 21 fixed to the negative side thereof, and a free end of the inclined plate 19 is provided. A push button 23 of a switch 22 is disposed at the lower part of the side with a clearance, and when the opening/closing valve 17 is opened, the floating trochanter 18 mounted on the pedestal 21 in the box 20 rolls on the surface of the elastic inclined plate 19. When the elevator moves and reaches the free end side, a push button 23 is pressed to open the contact of the switch 22, 24 is a supply hopper of the elevator, and 25 is an operation box of the drive unit of the device.

Note that a protruding push-up auxiliary plate may be attached to the back surface of the on-off valve 17 to push up the valve when the grain layer in the machine frame reaches a predetermined layer height.

Next, the control circuit 26 shown in FIG. 5 will be explained.

Between the power terminals R, S, T and the drive motor 16,
Contact MC of the starting electromagnetic contactor is interposed, and terminals R and S
Between them are the electromagnetic coil MC of the electromagnetic contactor, 5 start button switches, 5 stop button switches 5 TR, and the on-off valve 1.
Connect the normally closed contacts of the switch 22 provided at 7 in series,
The button switch ST is also provided with a self-holding circuit for the contacts of the electromagnetic coil MC.

With the above-described configuration, when raw paddy is put into the supply hopper 24 at the bottom of the elevator 7 and the start button switch ST of the operation box 25 is pressed, the electromagnetic coil MC of the electromagnetic contactor of the control circuit/path 26 is excited. When the contact MC is closed, the drive motor 16 is rotated to connect the edge to the grain bin 6 on the upper part of the fuselage 1.
The grains are then fried and filled, and then the grains are circulated several times through the grain circulation process and are then tempered and dried to a predetermined moisture content before being taken out of the machine.

In the meantime, if the above-mentioned failure occurs and the equilibrium state is lost between the amount of grain flowing on the drying section machine side and the amount of grain lifted on the elevator side, especially in the extension part of the conveying screw conveyor 11 in the grain circulation process A. Machine frame 1 with a certain extension connection part 12 and grain feeding spout part 13
Inside 2A and 13A, as described above, the excess paddy remains and the height of the paddy layer increases and changes, so the push-up blade (
The on-off valve 17 is pushed upward and opened by the flow of the rice layer in a jump-like and wave-like manner, and this opening action causes the floating trochanter 18 on the pedestal 21 of the switch box 20 to become elastic. When the inclined plate 19 rolls and reaches the free end side, the inclined plate 19 curves and presses the push button 23 to open the normally closed contact of the switch 22, so that the electromagnetic coil MC of the electromagnetic contactor opens. The demagnetization opens the contact MC, and the rotation of the driving electric motor 16 is stopped, so that the flow of rice grains within the device is completely stopped.

In addition, in order to emphasize the push-up blade of the rice layer at the position of the opening/closing valve, a jumping piece may be attached to the screw conveyor at the position.

In this way, the grain dryer conveyance control device of the present invention extends the conveying screw conveyor installed horizontally at the bottom of the grain tank and connects it to the grain feeding opening of the elevator, and An on-off valve is provided on the upper wall surface of the machine frame of the grain feeding port, and is opened and closed by a push-up blade due to a change in the layer height of fluid grains inside the machine frame. A switch box with a built-in control operating part such as a floating trochanter and a switch is installed, and the switch opens when the floating trochanter rolls on the elastic inclined plate surface and reaches the free end side due to the opening operation of the on-off valve. 1. Since the rotation of the drive electric motor for the grain circulation process is stopped, the control operation parts such as the floating rotor, the elastic inclined plate, and the switch are housed in the switch box, so that the control that occurs in the conventional device described above is avoided. It is possible to completely prevent malfunctions caused by damage caused by the actuating part coming into contact with equipment, etc., and malfunctions caused by splashes or spills adhering to or sticking to the control actuating part. Since it always detects excess grains with high precision and operates reliably, it is possible to completely prevent the generation of damaged grains such as broken rice and dehulled flake grains that occur in the connected conveyance section where paddy accumulates and stays in the event of a failure. Excess grains can be easily removed by opening the on-off valve and safe operation of the grain circulation process can be carried out immediately, and the work efficiency of grain drying can be improved.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Fig. 1 is a partially cutaway front view of this device, Fig. 2 is a side view of this device, Fig. 3 is a perspective view of the connecting part between the elevator and the drying section body, and Fig. 4 is the on-off valve. The enlarged perspective view and FIG. 5 are its electrical circuit diagrams. 1...Drying section fuselage, 2...Hot air chamber, 3
... Grain channel, 4 ... Exhaust chamber, 5 ...
... Grain tank, 6... Grain tank, 7...
・Elevator, 8...Grain dispersion plate, 9...
Conveyor, 10...Discharge valve, 11...
...Transportation screw conveyor, 12...
Extension connection part, 12A... Upper wall surface of machine frame, 13...
... Grain feeding opening, 13A ... Machine frame upper wall surface, 1
4... Crank mechanism, 15... Rotation transmission means, 16... Drive electric motor, 17...
...Opening/closing valve, 18...Idle trochanter, 19...
...Elastic inclined plate, 20...Switch box,
21...Pedestal, 22...Switch, 2
3... Push button, 24... Supply hopper, 25... Operation box, 26...
Control circuit, A...Grain circulation process.

Claims (1)

[Scope of utility model registration request] A grain circulation tank is provided at the bottom of the ventilation drying section.In a drying device in which the grain tank is mounted on the upper part of the drying section body, and an elevator is installed on one side of the dryer to form a grain circulation process, A conveyance screw conveyor installed horizontally at the bottom is extended and connected to the grain feeding port of the elevator, and the fluid grains inside the machine frame are transferred to the extension connection portion of the screw conveyor or to the upper wall surface of the machine frame at the grain feeding port. An on-off valve is provided that is opened and closed by a push-up blade due to a change in the layer height, and the on-off valve is equipped with an elastic inclined plate whose one end is a free end, a floating trochanter, and a switch box containing a control operation part such as a switch. When the idle trochanter rolls on the elastic inclined plate surface and reaches the free end side due to the opening operation of the on-off valve, a switch is opened to stop the rotation of the motor for driving the grain circulation process. Conveyance control device for grain dryer.