JPS6235591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for detecting a misfire in a furnace in a circulating grain drying apparatus.

(Prior Art) A conventionally known circulating grain drying apparatus has a sensor installed in its hot air passage to measure the temperature of the hot air, and when the temperature detected by the sensor falls below a set temperature, the furnace misfires. It was assumed that this was the case and a warning was issued.

In other words, if the temperature of the hot air drops to, say, 12°C while drying grain using hot air set at 45°C, it is determined that the furnace has gone out and an alarm is issued.

The above-mentioned value of 12° C. is given as an example for the purpose of explanation, as it is the same for many conventional products that are commonly used.

(Problem to be solved by the invention) However, if the outside air temperature rises above 12℃ during drying work, even if the furnace actually misfires, it will not be detected and no alarm will be issued because 12℃ is the set temperature. Does not appear.

The present invention improves this point and develops a method that always detects a misfire and issues an alarm even if the outside temperature rises above 12°C.

(Means for solving the problem) The present invention detects the temperature TB of the drying hot air by a hot air temperature detection sensor 15 installed in the drying hot air passage of a circulating grain drying device, The outside air temperature TA around the drying device is detected by the outside air temperature detection sensor 16, and the total amount of grain filled in the drying device, the type of grain, and the outside temperature are detected.
Set temperature of hot air supplied from TA etc. to the drying device
TC is determined, and the hot air measurement temperature TB detected by the hot air temperature detection sensor 15 and the outside temperature detection sensor 1 are determined.
When the difference from the outside temperature TA detected in step 6 becomes less than a predetermined value, the furnace 5 installed in the drying device is deemed to have misfired. This configuration consists of a detection method.

(Example) An example of the present invention will be described with reference to the drawings.
is a tank for storing grain, and a plurality of downstream type drying chambers 2, 2, . . . are formed at the bottom of the tank. A hot air supply chamber 3 is formed between the drying chambers 2, 2, and 4 is an air exhaust chamber. A furnace 5 is attached to the hot air supply chamber 3, and a suction device 6 is attached to the air exhaust chamber 4. When the suction device 6 rotates, hot air blows through the drying chamber 2 as shown by the arrow to dry the grains. Rotary valves 7 are attached to the lower end of the drying chamber 2, and below the rotary valves 7 there is provided an inverted C-shaped receiving trough 8, and a collection conveyor 9 is horizontally suspended in the center of the trough 8. The terminal end of the collecting conveyor 9 is connected to the lower end of a grain lifting cylinder 10, which is vertically installed on the side of the machine body, and a horizontal conveyor 11 is installed above it. The horizontal conveyor 11 is horizontally suspended above the tank 1, has a drop port 13 formed in the center of its receiving gutter 12, and is provided with a horizontally rotating dispersing device 14 at the bottom of the drop port 13. A hot air temperature detection sensor 15 for detecting the hot air temperature is installed inside the hot air supply chamber 3, and apart from the hot air temperature detection sensor 15, a sensor 15 for detecting the temperature of the hot air is installed on the outside of the aircraft body. Attach an outside temperature detection sensor 16 to detect the temperature. 17 is a control box, and 18 is a moisture meter.

Figure 5 is an example of a flowchart, where TC is the set temperature of hot air for grain drying, TA is the outside temperature around the dryer, TB is the measured temperature of hot air supplied to drying chamber 2, TB, and 19 is the misfire memory. , 20 is an alarm device, and A, B, a, b, and c are constants.
FIG. 6 is a block diagram of the flowchart shown in FIG.

(effect) Next, we will discuss the effect.

Since this device has the above-described configuration, when raw materials are inputted from the charging port, they are transferred by the collection conveyor 9 and flow into the lower end of the grain lifting cylinder 10, and then ascended by the bucket elevator and moved horizontally within the horizontal conveyor 11. It falls through the drop port 13, is dispersed by the dispersion device 14, and fills the drying chamber 2 and tank 1.

When this state is reached, a part of the poured material is removed and its moisture content and properties are investigated to determine the most appropriate hot air setting temperature TC.
The set temperature TC of the hot air from the furnace 5 is controlled by the IC circuit.
When hot air approximating to 1 is supplied, the rotation of the suction machine 6 supplies the hot air into the drying chamber 2 to dry the grains.

If the furnace 5 misfires due to an abnormality such as running out of fuel, a fall in the temperature of the hot air supplied to the drying chamber 2 is detected and a misfire alarm is output. That is, the hot air temperature detection sensor 15 and outside temperature detection sensor 16 provided inside and outside the drying chamber 2 detect the measured temperature TB of the hot air supplied into the drying chamber 2 and the outside temperature TA around the drying chamber 2, respectively. , if the difference (TB-TA) is less than a predetermined value a, b or c, the alarm device 20 is activated via the misfire memory 19.

In this example, as shown in the flowchart of Fig. 5, the difference between the hot air set temperature TC and the outside air temperature TA (TC - TA) is compared with a predetermined value A or B, and the hot air set temperature TC is If the outside temperature TA is less than (TC-A), from (TC-A) to (TC-B), or above (TC-B), first determine whether it falls into one of the following zones. However, in the zone, if the above (TB-TA) becomes less than the predetermined value a, it is assumed that the furnace 5 has misfired and an alarm is issued; in the zone, if it is less than the predetermined value b, and furthermore, in the zone, if it is less than the predetermined value c, A misfire alarm is issued for each of the following.

To explain the above using specific numbers, the hot air set temperature TC is 45℃, the predetermined value A is 35℃,
Predetermined value B is 15℃, predetermined value a is 10℃, predetermined value b
If C is 7℃ and the predetermined value C is 5℃, then the outside temperature TA
However, when the outside temperature is less than 10℃, the zone is 10℃, when it is between 10℃ and 30℃, it is the zone 3, and when it is above 30℃, it is the zone.For example, when the outside temperature is 5℃ (zone 1), the hot air temperature is When the hot air temperature TB measured by the detection sensor 15 drops by 15°C, it is assumed that the furnace 5 has misfired and a misfire alarm is issued. Also, the outside temperature is 20℃
In the case of (Zone 1), when the hot air temperature TB decreases by 27℃, if the outside temperature is 32℃ (Zone)
A misfire alarm is issued when the hot air temperature drops by 37℃.

On the other hand, under the same outside temperature TA, the hot air set temperature
Predetermined values A, B, a, b, c even when TC is different
By selecting , highly accurate misfire detection becomes possible.

To give a specific example, when the outside temperature is 20°C, and the predetermined values A and B are set to 35°C and 15°C, respectively, when the hot air set temperature TC is 60°C (zone 2), the predetermined value a is 15°C. Therefore, a misfire is detected when the hot air temperature TB is 35°C, and similarly, when TC is 40°C (zone 1), a misfire is detected at 27°C because the predetermined value b is 7°C. When the TC is set at 30°C (zone 1), the predetermined value c is 5°C, so a misfire is detected when the temperature reaches 25°C.

In this way, the temperature that serves as the standard for determining a misfire is the outside temperature TA, and the hot air temperature TB and the outside temperature
Since it depends on whether the difference with TA is below a predetermined value a, b, or c, a misfire alarm can be reliably issued even during drying work in an environment with severe temperature fluctuations.

(Effects) Conventionally known circulating grain drying equipment has a sensor installed in its hot air passage to measure the temperature of the hot air, and if the temperature detected by the sensor falls below a set temperature, the furnace will misfire. It was assumed that this was the case and a warning was issued.

In other words, if the temperature of the hot air drops to, say, 12°C while drying grain using hot air set at 45°C, it is determined that the furnace has gone out and an alarm is issued.

The above-mentioned value of 12° C. is given as an example for explanation, as it is the same for many conventional products that are commonly used.

However, if the outside temperature rises above 12°C during drying work, the set temperature is 12°C, so even if the furnace actually misfires, it will not be detected and no warning will be issued.

However, the present invention provides a hot air temperature detection sensor 1 provided in the path of drying hot air of a circulating grain drying device.
5 detects the temperature TB of the drying hot air, and an outside temperature detection sensor 16 installed near the drying device
detects the outside air temperature TA around the drying device,
A thermal circumferential set temperature TC to be supplied to the drying device is determined based on the total amount of grain filled in the drying device, the type of grain, outside temperature TA, etc., and the hot air measurement temperature TB detected by the hot air temperature detection sensor 15 and outside temperature detection are determined. A misfire in the furnace in a circulating grain drying device in which the furnace 5 installed in the drying device is assumed to have misfired when the difference between the outside temperature TA detected by the sensor 16 becomes less than a predetermined value. Since this detection method is configured, a misfire can be reliably detected even when the outside temperature TA fluctuates, and the above-mentioned gap can be eliminated.

[Brief explanation of the drawing]

Figure 1 is an overall side view, Figure 2 is a vertical front view,
FIG. 3 is an overall front view, FIG. 4 is a longitudinal side view, FIG. 5 is a flowchart, and FIG. 6 is a block diagram. Explanation of symbols, 1...Tank, 2...Drying room, 3
... Hot air supply room, 4 ... Exhaust room, 5 ... Furnace, 6
...Suction machine, 7...Rotary valve, 8...Gutter, 9...
Gathering conveyor, 10...Grain lifting cylinder, 11...Horizontal conveyor, 12...Support gutter, 13...Drop opening, 14...
... Dispersion device, 15 ... Hot air temperature detection sensor, 1
6...Outside temperature detection sensor, 17...Control box, 18...Moisture meter, 19...Misfire memory, 20...Alarm device, ABabc...Constant (predetermined value), TC...Hot air set temperature C, TA ……Outside temperature,
TB...Hot air measurement temperature.

Claims (1)

[Claims] 1. The temperature TB of the drying hot air is detected by the hot air temperature detection sensor 15 installed in the drying hot air passage of the circulating grain drying device, and the temperature TB of the drying hot air is detected by the outside temperature detection sensor 16 installed near the drying device. Detect the air temperature TA, determine the set temperature TC of hot air to be supplied to the drying device based on the total amount of grain filled in the drying device, the type of grain, the outside temperature TA, etc., and set the hot air measurement temperature detected by the hot air temperature detection sensor 15. The circulating grain drying device is configured to assume that the furnace 5 installed in the drying device has misfired when the difference between TB and the outside temperature TA detected by the outside temperature detection sensor 16 becomes less than a predetermined value. A method for detecting a misfire in a furnace.