JPS5953465B2 - Automatic hot air temperature control device for grain dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an automatic hot air temperature control device for a grain dryer. A plurality of level gauges are installed to measure the amount of grain in the tank at each setting position, and a plurality of injection nozzles are fitted to a heat generator installed in the drying section body, and a fuel supply pipe of the injection nozzle is installed. are each provided with an on-off valve, and a plurality of temperature switches that individually operate at arbitrary different temperatures are provided in the hot air chamber connected to the fire heat generator,
These are connected electrically in relation to each other to immediately increase or decrease the fuel injection amount of the injection nozzle in accordance with the increase or decrease in the amount of grain supplied to the grain tank, that is, the amount of grain fed, and to correct it to a predetermined hot air temperature. The purpose of this project is to develop and provide a new and automated device that regulates the temperature change of the hot air within an appropriate range, improves and streamlines the drying action of grains, and is automated.

The embodiment of the present invention will be described with reference to illustrative drawings. In the drawing, reference numeral 1 indicates a hot air chamber 2. Grain channel 3.3. Exhaust room 4
, 4 in parallel, and is also equipped with a 5° exhaust fan and a heat generator 6. A grain tank 7 is mounted on the top of the machine 1, and an elevator 8 is installed upright on one side. This is a circulating grain dryer that is integrally formed.

Next, the fire heat generator 6 will be explained in detail with reference to FIG.
A plurality of injection nozzles lla, llb are fitted and arranged substantially parallel to the axial direction in the front half of a cylindrical blower 10 connected to the blower 9, and a spark plug 12 is protruded from the vicinity thereof. A combustion chamber 17 is provided on the discharge side 13 of the combustion chamber 10, in which a plurality of porous-wall cylinder crown-shaped cages 14 and 15 of different diameters are superimposed substantially concentrically at an appropriate interval 16, and on the side wall of the combustion chamber 17. A shielding plate 18 and a swirl wall 19 are installed on the rear side wall, respectively, and these machine parts 9, 10, and 17 are integrally formed.

Incidentally, reference numeral 20 denotes an oil supply pipe for supplying oil to each of the nozzles 11a and llb, and electromagnetic valves 21a and 21b each having an on-off valve are installed in the container pipes 20 and 20, and the electric wire of the plug 12 is connected to the oil pipe 20. A transformer 22 is installed.

Although each of the injection nozzles lla and llb has an aperture ratio of 1:2, the number and aperture ratio are arbitrary and are not limited in any way.

Next, regarding the grain tank 7, the amount of grain in the tank is measured at respective set positions a, l), and c, which are arranged vertically in a column on one side wall surface of the grain tank 7 at appropriate intervals. When a plurality of level meters 23a, 23b, and 23C are installed and the amount of grain to be supplied is measured at each of the locations a, l), and c, the excitation coils R4, R5, and The contacts R4 and R5 of the separately provided hot air temperature control circuit 24 are activated by individually operating R6 and using the signal.
, R6 are formed to open and close as appropriate.

Further, on the inner side wall of the hot air chamber 2, appropriate hot air temperatures (40°C) (50°C) (60°C) are selected corresponding to the amount of grain in each part a, l), and c of the grain tank 7. Automatic return type thermostats 25a, 25b that operate by
, 25C is installed, each contact of which is interposed in the regulating circuit 24.

Therefore, in FIG. 3, to explain the hot air temperature adjustment circuit 24, the above-mentioned set temperature (4
B contact thermostat that opens and closes at 0°C) -253
and excitation coil R1, R5, R6 of B contact, R4 of A contact
are connected in series, and a B contact thermostat 25b that opens and closes at a set temperature (50°C) and an exciting coil R2,
The B contact R6 and the A contact R5 are connected in series, and the B contact thermostat 25C, which opens and closes at the set temperature (60°C), the exciting coil R3 and the A contact R6 are connected in series, and each thermostat is connected in series. The contact circuits are arranged and connected in parallel.

Next, the electromagnetic valve 21a interposed in the oil feed pipe of the injection nozzle 11a, the a contact R1, and the b contact R2 are connected in series, and a circuit of the a contact R6 is connected to the outside of both contacts R1 and R2. The a contact R2 and the b contact R3 are connected in parallel to the electromagnetic valve 21b interposed in the oil feed pipe of the injection nozzle 11b, and each electromagnetic valve 21a, 21
The circuits b are arranged and connected in parallel.

In this example, the effective grain storage volume of the grain tank 7 is equally divided into three areas, upper and lower, by predetermined positions a, l), and c of each level gauge provided on the side wall surface of the grain tank 7. A from the bottom to the top at the upper limit of the layer height.

Arranged in the order of b and c, each level meter 23a at each setting position,
23b and 23C, respectively, and the setting position a.
, b, c, the appropriate hot air temperature corresponding to each amount of grain is the set temperature of the temperature switch (40
℃) (50℃) (60℃); therefore, the number and setting positions of the level meters and the number and setting values of the temperature switches in the hot air chamber may be changed as necessary. Although the opening/closing valve of the injection nozzle is provided as a solenoid valve in the example diagram, it may also be a solenoid valve, a solenoid valve, or the like.

Then, a predetermined temperature (40° C.) of the temperature switch 25 (
50°C) (60°C), an appropriate correction value is added depending on the equipment used.

Since the present invention is constructed as described above, when the raw material grain is put into the supply port of the elevator 8 and the device is driven with the fire heat generator 6 in a state where it can be ignited, the raw material grain is transferred to the upper grain tank by the elevator 8. Fried grains are sequentially supplied at 7.

When grain is fed to the set position of the grain tank 7 in which the level gauge 23 is provided on the metal plate and the grain feeding in the elevator 8 is stopped, both the level gauges 233 and 23b are activated to measure the grain, and control is immediately performed. Contacts R4 and R5 of the hot air temperature control circuit 24 are both closed by activation signals of the excitation coils R4 and R5 of circuit A.

In connection with this, the contacts of the injection nozzles lla and llb circuits are activated, and the large-diameter injection nozzle llb opens to inject fuel, generating hot air close to 50°C in the hot air chamber 2, and the hot air is distributed to each grain. It crosses the grain layer in the channels 3, 3 and flows out to the exhaust chambers 4, 4 side to perform a drying action, and the dried grain in the channel 3 flows into the grain tank at the bottom and is returned via the elevator 8. The grain is returned to the upper grain tank 7, and so-called circulating tempering drying is carried out continuously.

When the drying action is carried out in this manner, the temperature of the hot air in the hot air chamber 2 inevitably increases over time.

Therefore, in this device, the set temperature (40
Automatic reset type thermostats 25a, 25b, and 25C that operate at temperatures of The contact R2 of the injection nozzle lla, llb circuit is actuated to open and close the injection nozzle lla, llb in a reversible manner, and the large-diameter injection nozzle llb is closed and the small-diameter injection nozzle 11a is opened. Since the amount of fuel injected by the fire heat generator 6 decreases, the temperature of the hot air in the hot air chamber 2 gradually decreases.

Then, the thermostat 25b reversely opens and closes its contacts at an appropriate return temperature, and the hot air in the hot air chamber 2 is automatically regulated to an appropriate range of around 50°C, so that efficient grain drying is always carried out. It is something.

Next, the combustion status of the heat generator 6 will be described.
Conventional injection nozzle types adjust the combustion amount by changing the fuel flow rate or pressure, so if the nozzle has the same diameter, the fuel flow rate changes and each spray particle expands, so the combustion gas contains CO, It had a defect that increased the mixing rate of HC and the like.

Therefore, this fire heat generator is fitted with a plurality of injection nozzles and is individually provided with an on-off valve that only supplies and stops fuel to each nozzle for injection and combustion. can be removed.

Moreover, in order to promote complete combustion, the combustion chamber is formed into multiple foil bodies, so that carbon monoxide, unburned particles, etc. still generated in small amounts in the inner foil body 14 are trapped in both the combustion gas and the combustion chamber. The carbon monoxide and unburnt particles are heated when they pass in contact with the porous wall vents of each of the foil bodies 14 and 15, which become red hot. Moreover, since the foil is made of multiple foils, the decomposition and combustion is carried out on each porous wall surface of each foil, resulting in good flaming and complete combustion, which has the effect of increasing the thermal power and increasing the combustion efficiency. be.

In short, the present invention has a plurality of level meters installed on the side wall surface of a grain tank to measure the amount of grain in the tank at respective set positions arranged vertically in a column at appropriate intervals, and A machine is provided with a plurality of fuel injection nozzles, each of which is equipped with an on-off valve in its fuel supply pipe, and the on-off valves of the injection nozzles are individually opened and closed according to the amount of grain fed to the grain tank for combustion. The number of nozzles is increased or decreased to change the temperature of the hot air in the hot air chamber to an appropriate set temperature, and the temperature change of the hot air is regulated within an appropriate range. The temperature immediately changes to the appropriate set temperature in response to changes in the amount of grain fed to the grain tank, without the need for complicated work or operations such as replacing each injection nozzle with a larger or smaller diameter or adjusting the compressed air to adjust the temperature. death,
Moreover, since the drying action of the grain is continuously carried out while the temperature change of the hot air is automatically regulated within an appropriate range, there is a large number of cracked grains due to poor temperature control, heat-damaged grains, and a decrease in taste. This completely prevents quality defects such as grain drying, improves and streamlines the drying process of grains, and allows it to be carried out with extremely high efficiency. It also prevents fires caused by overheating, and controls and manages them accurately and automatically. Since this process is carried out, it produces remarkable effects such as the fact that high-quality dried grains can always be expected.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a partially cutaway side view of the device, FIG. 2 is a sectional view of the heat generator, and FIG.
The figure is its electrical circuit diagram. 1...Drying section fuselage, 2...Hot air chamber, 3
... Grain channel, 4 ... Exhaust chamber, 5 ...
...Exhaust fan, 6...Fire heat generator, 7...
...Grain tank, 8...Elevator, 9...
Blower, 10...Blower mouth, lla...Injection nozzle, 11b...Injection nozzle, 12...
... Spark plug, 13 ... Discharge side of outlet 10, 14 ... Foil body, 15 ... Foil body, 16
...... Interval, 17... Combustion chamber, 18...
... Shielding plate, 19 ... Swirl wall, 20.
... Oil pipe, 21a ... Solenoid valve, 2
1b... Solenoid valve, 22... Lance, 23a... Level meter, 23b... Level meter, 23C... Level meter, 24・・・・・・
・Hot air temperature control circuit, 25...Temperature switch,
25a...Thermostat, 25b...
・Thermostat, 25C...Thermostat, R1, R2, R3゜R4, R5, R6...Exciting coil, contact, A...Control circuit.

Claims (1)

[Claims] 1 Fire heat generator with parallel grain flow path, hot air chamber, and exhaust chamber.
In a drying device in which a grain tank is combined with a drying section body equipped with an air exhaust fan, the amount of grain in the tank is measured at each set position arranged vertically in a column on the side wall of the grain tank at appropriate intervals. A plurality of level gauges are installed, a plurality of fuel injection nozzles are installed in the fire heat generator, and an on-off valve is installed in each of the fuel supply pipes, and the hot air chamber is individually injected at different temperatures. A plurality of operating temperature switches are installed, and the opening/closing valves of the injection nozzles are individually opened and closed according to the amount of grain fed to the grain tank to increase or decrease the number of injection nozzles for combustion, thereby discharging the hot air in the hot air chamber. An automatic hot air temperature adjustment device for a grain dryer that changes the temperature to an appropriate setting and regulates the temperature change of the hot air within an appropriate range.