JPH0438231Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention causes a part of the hot air used for drying to flow through a hot air distribution chamber arranged around the storage tank, thereby causing a dew point phenomenon on the inner wall surface of the storage tank. Even when actively heating the storage tank to prevent it from occurring, a damper device that opens and closes according to the detection operation of the hot air temperature sensor and grain temperature sensor installed inside the storage tank prevents the temperature rise inside the storage tank. The present invention relates to a grain drying device capable of preventing uneven flow and shell cracking by maintaining an optimum temperature at which no dew point phenomenon occurs on the inner wall surface of a storage tank.

Conventional technology Conventionally, a method has been used to temporarily store grains that have been exposed to hot air and become stagnant, preventing the dew point phenomenon from occurring on the inner wall surface of the storage tank and allowing the grains to flow uniformly down inside the storage tank. A known grain drying apparatus is the one described in Japanese Patent Publication No. 55-2547, which is an example of this application, and this will be explained with reference to FIG.
That is, a substantially sealed paddy storage chamber 2 surrounded by an exhaust chamber 3 is provided in the upper part of the drying cylinder 1 which is substantially sealed. A hot air chamber 5 and a dust removal chamber 6 are provided at the lower end of the paddy storage chamber 2 on the left and right sides of the drying passage 4. One end is connected to the dust exhaust tube 7 installed in the dust exhaust chamber 6, and the opened dust exhaust branch tube 8 is connected to the exhaust chamber 3, and the other end of the exhaust chamber 3 is connected to the dust exhaust chamber 6.
A part of the exhaust hot air used for drying is made to flow into the exhaust chamber 3 arranged around the almost airtight paddy storage chamber 2, and the paddy storage chamber 2 is preheated. This is intended to prevent the dew point phenomenon from occurring on the inner wall surface of the paddy storage chamber 2, to allow the paddy to flow down evenly in a leveled state, and to obtain uniformly dried paddy.

Problems that the invention aims to solve By the way, in conventional grain drying equipment of this type, the air flowing in the exhaust chamber is low-temperature exhaust air that has been used for drying, so the inside of the paddy storage chamber is It becomes impossible to preheat the entire paddy storage room to the extent that no dew point phenomenon occurs on the wall surface, and as a result, a considerable temperature difference occurs between the temperature of the paddy storage room and the outside air temperature, and the dew point phenomenon occurs on the wall surface of the paddy storage room. This phenomenon occurred, and the paddy was exposed to hot air and was stored in the paddy storage room in a stagnant state, probably due to this dew point phenomenon causing uneven flow. A problem has arisen in that it is more likely to occur.

Means for solving the problem The present invention solves the above problems, and includes:
The contents will be explained below using FIG. 1 and FIG. 2 corresponding to the embodiment.

That is, inside the dryer main body 101, there is a storage layer 102 surrounded by a hot air distribution chamber 105 whose upper and lower ends are open from the upper stage to the lower stage, and a hot air blowing chamber 106 and a dust exhaust air chamber 10 provided on both the left and right sides.
A ventilation drying cylinder 103 has a plurality of hot air chambers 108 and exhaust chambers 109, each of which is connected at one end to a wind turbine 7, installed alternately so that a drying passage 110 is formed between the two chambers 108, 109, and a hot air blower on both left and right sides. A chamber 106 and a take-out chamber 104 surrounded by a dust exhaust air chamber 107 are sequentially provided three-dimensionally. The hot air blowing chamber 106 and the hot air chamber 108 are both the hot air distribution chamber 105.
It is connected to. A relay pipe 111 connects the upper part of the storage tank 102 and the dust exhaust air chamber 107.
In the middle of the storage tank 102, there is a damper device 11 which is opened and closed according to the detection operations of a hot air temperature sensor 115 and a grain temperature sensor 116 disposed in the storage tank 102.
2.

Operation Now, at the start of the drying work, a predetermined amount of grain is filled into the storage tank 102 and the ventilation drying cylinder 103, and then hot air is generated in the hot air blowing chamber 106, and at the same time, the inside of the dust exhaust air chamber 107 is After the grain is brought to a pressurized state, the grain is circulated through the storage tank 102, the ventilation drying cylinder 103, and the take-out chamber 104 in order to flow many times.

Then, while the grains are successively flowing down through the drying passage 110 .
After being exposed to the circulating hot air and being somewhat dried, it falls into the lower take-out chamber 104, and is then circulated back to the storage tank 102, where the same drying effect as described above is performed. Therefore, the grain is dried to a predetermined moisture level by multiple drying cycles. By the way, during the circulation drying work as described above, the negative pressure in the dust exhaust air chamber 107 also causes a suction effect in the hot air distribution chamber 105 provided around the inside of the storage tank 102 via the relay pipe 111. Therefore, the pressure quickly becomes negative, and a part of the hot air generated in the hot air blowing chamber 106 is directly sucked and distributed through the hot air blowing chamber 106, the hot air chamber 108, and so on.

As a result, the hot air is directly distributed into the hot air distribution chamber 105, and the temperature of the entire storage tank 102 is raised to a considerable temperature.

Therefore, even if the drying work is carried out at night when the outside air is cold, it is possible to prevent shell cracking caused by the rapid cooling of the grains in a stagnant state. By this, it is possible to accurately prevent the dew point phenomenon from occurring, flow the grain in a uniform state without causing any uneven flow, and quickly obtain uniformly dried grain.

Further, a damper device 112 is provided in the middle of the relay pipe 111, and the damper device 112 is configured so that the temperature detected by the hot air temperature sensors 115 disposed at the upper and lower positions of the storage tank 102 is the temperature detected by the grain temperature sensor 116. When the temperature is lower than When the temperature is lower than the temperature detected by the temperature sensor 115, the damper device 112 is operated in the closing direction to cut off the supply of hot air.

Example An embodiment of the present invention will be described below.

In the drawings, reference numeral 101 denotes a dryer main body in the shape of an oblong rectangular tube that is long in the front-rear direction;
1, there is a storage tank 102 surrounded by hot air distribution chambers 105 with both upper and lower ends open from the upper stage to the lower stage, and hot air blowing chambers 1 provided on both left and right sides.
06 and the dust exhaust air chamber 107, a plurality of hot air chambers 108 and exhaust air chambers 109 each connected at one end are arranged in a direction perpendicular to the horizontal direction so that a drying passage 110 is formed between the two chambers 108, 109. A ventilation drying cylinder 103 is constructed along the
06 and an extraction chamber 104 surrounded by a dust exhaust air chamber 107
and are arranged three-dimensionally in sequence. The upper end of the hot air blowing chamber 106 is located at the lower end of the hot air distribution chamber 105, and the ventilation opening 108b opened at the upper end of the sealing side wall plate 108a of the hot air chamber 108... is connected to the hot air distribution chamber 105.
5, respectively.

The upper end side of the drying passage 110... is connected to the storage tank 102 provided above the hot air chamber 108 and the exhaust air chamber 109, and the lower end side is connected to the storage tank 102 provided above the hot air chamber 108... and the exhaust air chamber 109. Yamagata partition wall 1 arranged in multiple rows along the horizontal direction
A plurality of drying passages 1 are connected to a plurality of cross-flow downward discharging chambers 113 formed by 14...
After passing through the drying passage 110..., the flow of grains divided into the front and rear directions at 10... is then diverted to the left and right directions to flow crosswise, thereby efficiently stirring the grains with different initial moisture content values. At the same time as mixing, the fluidity of the grain is improved, and uneven drying and uneven flow of the grain can be eliminated.

Reference numeral 111 is a relay pipe having one end connected to the upper part of the storage tank 102 and the other end connected to one side of the dust exhaust air chamber 107, and a rotatable switching valve 112a disposed in the middle thereof. A damper device 112 is provided with a housing shaft.

The damper device 112 has a hot air temperature sensor 115 disposed at an upper position within the storage tank 102 and a grain temperature sensor 116 disposed at a lower position within the storage tank 102, a comparison circuit 117, and an operating circuit 1.
18 connected to the hot air temperature sensor 115
When the temperature detected by the grain temperature sensor 116 is lower than the temperature detected by the grain temperature sensor 116, the switching valve 112a is operated in the opening direction to supply and circulate hot air into the hot air distribution chamber 105 by suction, and conversely, the temperature detected by the hot air temperature sensor 115 is When the temperature is higher than the temperature detected by the grain temperature sensor 116, the switching valve 112a is operated in the closing direction to prevent hot air from flowing through the hot air distribution chamber 105.

A hot air generation duct 119 housing a burner device 120 for generating hot air for drying is open-connected to one side of the hot air blowing chamber 106, and a hot air generating duct 119 housing a burner device 120 for generating hot air for drying is connected to one side of the hot air blowing chamber 106. A dust exhaust duct 121 housing a suction exhaust fan 122 is open-connected. 123 is a cross-flow downward feeding chamber 113...
This is a feed roll that is rotatably suspended horizontally at the bottom of the machine.

At the bottom of the take-out chamber 104, a take-out gutter 124 with a take-out screw 125 horizontally suspended along the front-rear direction is provided.
Elevator 126 attached to one side of the dryer main body 101
The upper part of the elevator 126 is connected to the supply start end side of a carry-in gutter 127 installed horizontally in the upper part of the storage tank 102.

Effects of the Invention In short, the present invention has a storage tank 102 surrounded by a hot air distribution chamber 105 that extends from the upper stage to the lower stage and is open at both upper and lower ends, in the dryer main body 101, and a hot air blowing chamber 106 provided on both left and right sides. A plurality of hot air chambers 10 each having one end connected to a dust exhaust air chamber 107
8 and ventilation chambers 109 are alternately installed so that a drying passage 110 is formed between both chambers 108 and 109, and hot air ventilation chambers 106 on both left and right sides.
and a take-out chamber 104 surrounded by a dust exhaust air chamber 107 are sequentially provided, and the hot air blow chamber 106 and the hot air chamber 1 are
08 are both connected to the hot air distribution chamber 105, and in the middle of the relay pipe 111 connecting the upper part of the storage tank 102 and the dust removal air chamber 107, the storage tank 1
Since a damper device 112 is provided that opens and closes in response to the detection operations of the hot air temperature sensor 115 and grain temperature sensor 116 disposed inside the storage tank 102, the damper device 112 is installed around the storage tank 102 during circulation drying work. The hot air for drying generated in the hot air blowing chamber 106 is caused to flow directly into the hot air circulation chamber 105 due to the negative pressure action of the dust exhaust air chamber 107, so that a dew point phenomenon does not occur on the inner wall surface of the storage tank 102 due to the temperature difference with the outside air. Not only can it be possible to raise the temperature to a certain degree and allow the grain to flow down uniformly without causing uneven flow to obtain uniformly dried grain, but also to prevent grains in a heated state from cooling and cracking during storage. In order to prevent this, the amount of hot air supplied into the storage tank 102 is adjusted at any time by a damper device 112 that opens and closes in response to the detection operations of the hot air temperature sensor 115 and the grain temperature sensor 116 disposed inside the storage tank 102. As a result, the temperature increase in the storage tank 102 can be accurately maintained at an optimum temperature at which uneven flow and shell cracking do not occur.

[Brief explanation of the drawing]

The drawings show an embodiment of the grain drying apparatus according to the present invention, in which Fig. 1 is a front view with main parts cut away, Fig. 2 is a side view with main parts cut away, and Fig. 3 shows a conventional example. FIG. 101...Dryer main body, 102...Storage tank, 1
03... Ventilation drying cylinder, 104... Taking out tank, 10
5... Hot air distribution room, 106... Hot air blowing room, 10
7...Dust exhaust air chamber, 108...Hot air chamber, 109...
Exhaust room, 110...drying passage, 111...relay pipe, 112...damper device, 115...hot air temperature sensor, 116...grain temperature sensor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Inside the dryer body, from the upper stage to the lower stage, there is a storage tank surrounded by hot air distribution chambers that are open at both the top and bottom ends, hot air ventilation chambers on both the left and right sides, and dust ventilation chambers. A ventilation drying cylinder is constructed by alternately constructing a plurality of hot air chambers and ventilation chambers each connected to the chamber at one end so as to form a drying passage between the two chambers, and a hot air ventilation chamber and a dust exhaust ventilation chamber are installed on both left and right sides. The hot air blowing chamber and the hot air chamber are both connected to the hot air distribution chamber, and in the middle of the relay pipe connecting the upper part of the storage tank and the dust removal chamber, 1. A grain drying device comprising a damper device that opens and closes in response to detected values from a hot air temperature sensor and a grain temperature sensor disposed in a storage tank. (2) A utility model characterized in that the damper device operates in the opening direction when the temperature detected by the grain temperature sensor is higher than the temperature detected by the hot air temperature sensor, and operates in the closing direction when the temperature is lower than that detected by the hot air temperature sensor. A grain drying apparatus according to claim 1.