JPH073262Y2 - Grain dryer dust extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dust extractor for a grain dryer, and more particularly to a dust remover for a dryer that improves dust removal performance and prevents loss of good quality grains.

[Prior Art] Conventionally, in a grain dryer, a suction blower is provided at the upper part of the machine body, and a suction port is provided particularly in a portion where dust is likely to be generated to discharge dust. In order to improve the dust removal performance, (a) as disclosed in Japanese Utility Model Laid-Open No. 55-73798, a screw shaft was provided with an agitator to actively generate dust, thereby improving the separation of dust. There is something. Alternatively, (a) as disclosed in Japanese Utility Model Publication No. 60-123590,
A suction blower was connected to the horizontal conveyer via a dust collecting box.

[Problems to be Solved by the Invention] However, the conventional configuration as described above has the following disadvantages. That is, in (a), a phenomenon occurs in which the grain is lifted up vigorously and is carried out of the machine by the suction air of the suction blower. There was an inconvenience. Also, in (a), since the dust container is directly connected to the transverse conveyor, the suction force of the suction blower acts in a biased manner in the transverse conveyor, so the air flow is not uniform and strong. At the location of the wind flow, there was a phenomenon in which the grains that had been flipped up by the screw shaft were carried as they were in the air stream and carried away from the machine, resulting in a reduction in production costs.

[Purpose of Invention] Therefore, the purpose of this invention is to eliminate the above-mentioned inconvenience.
It is an object of the present invention to improve the performance of separating and eliminating dust inside the machine during operation of the grain dryer, while the loss of good quality grains is intended to obtain a dust dryer of the grain dryer which is reduced as much as possible.

[Means for Solving the Problems] In order to achieve the above object, the invention of the present application is directed to a storage chamber for storing grains, a drying chamber for continuously contacting the grain with drying air, and a grain flowing from the drying chamber. And a transversely-conveying unit installed across a main body including a grain-collecting chamber for horizontally transporting the grain, a grain-lifting machine for lifting the grains from the grain-collecting chamber, and an appropriate position of a screw shaft forming the horizontal-transport conveyor. A stirrer member provided in, a suction port provided on the outer wall of the lateral transfer conveyor behind the position of the stirrer member, and a lower dust pipe connected to and positioned in front of the stirrer member of the lateral transfer conveyor. , A dust separation chamber connected to the lower dust pipe, an upper dust pipe connected to the separation chamber at a center line different from the lower dust pipe, and connected to the other end of the upper dust pipe A suction blower is provided.

[Operation] With the configuration as described above, in the device of the present application, the suction pressure of the exhaust fan that causes the dry air of the dryer does not conflict with the suction force of the dust remover, and is significantly separated compared to the conventional case. It has an efficient dust removal function, and because the suction pressure reaches the inside of the horizontal conveyor via the lower dust collection tube, air becomes a laminar flow and there is no bias, and high-quality grains can be lost. lost.

[Embodiment] An embodiment of the invention of this application will be described below with reference to the drawings.

Referring to FIG. 1, a circulation type grain dryer 1 is a conventionally known type, and it has an upper storage chamber 2 for storing grains, a drying chamber (not shown) connected to the lower storage chamber, and further collects grains flowing down from the drying chamber. A main body composed of a grain collection chamber having a lateral transport function for laterally transporting, a grain fried machine 3 that is connected to the grain collection chamber and lifts grains, the grain fried machine 3 and the storage chamber 2. And a horizontal conveyor 4 for communicating with each other.

An opening 4b is formed in the case 4a of the transverse conveyor 4,
The lower dust-canister 5 is connected to it in a substantially vertical manner from above. The storage chamber 2 is located behind the opening 4b of the case 4a (which is the opposite direction of the conveyor carrying direction).
In addition to providing an intake port 4c formed of a plurality of small openings outside the container, grain is intentionally placed on the screw shaft 4d of the transverse conveyor 4 at a position approximately in the middle of the opening 4b and the intake port 4c. A stirring member 4e for stirring is provided.

A dust separation chamber 6 having a cross-sectional area larger than the cross-sectional area of the lower dust collecting tube 5 is connected to the upper end of the lower dust collecting tube 5. Further, an upper dust collecting cylinder 7 is connected to the upper part of the separation chamber 6 while being eccentrically arranged so as to have a center line different from that of the lower dust collecting cylinder 5. A suction blower 8 mounted and fixed to the upper outer wall of the storage chamber 2 or the like is connected to the other end of the upper dust container 7. In addition, 9 is a driving motor, and 10 and 11 are pulleys of the fried machine 3 and the lateral conveying conveyor 4.

Next, the operation of this invention will be described.

When the grain dryer 1 is operated and operated, the grains contained in the grain dryer circulate through the storage chamber 2, the drying chamber, the grain collecting chamber, the grain lifting device 3 and the horizontal conveyor 4. Meanwhile, in the drying chamber, the grains come into contact with hot air and dry. Further, during circulation, the grain is brought from the grain lifting machine 3 into the horizontal conveyor 4, and is intentionally stirred by the stirring member 4e provided on the screw shaft 4d. Then, the suction air generated by the action of the suction blower 8 flows from the suction port 4c through the opening 4b, and can efficiently flow between the grains in the case 4a of the horizontal conveyor 4. Therefore, it is possible to efficiently put dust and foreign matters mixed between grains into the air flow.

Further, since the lower dust collecting tube 5 is connected to the case 4a in a secret manner, the negative pressure in the storage chamber 2 caused by the exhaust fan for generating the normal dry air is less likely to affect the suction effect. To play. The suction force reaches the lower dust collecting cylinder 5 through the upper dust collecting cylinder 7 and the separating chamber 6, but the upper dust collecting cylinder 7 and the lower dust collecting cylinder 5 are separated so that the centers thereof are different from each other. 6 connected, so the upper dust collector 7
The suction pressure of does not reach the lower dust collecting tube 5 as it is,
Since each part is once averaged in the separation chamber 6 and then reaches the lower dust collecting cylinder 5, an air flow exhibiting an average suction pressure for each part, that is, a laminar flow is formed in the lower dust collecting cylinder 5. Therefore, even if there is a good quality grain that has been jumped up and jumped up by the stirring member 4e, it is no longer carried on the high-speed air flow and discharged to the outside. Even if there is a slight bounce, the grain with a large mass loses the rising energy and falls due to the decrease of the air flow velocity in the separation chamber 6 and the change of the direction of the air flow.

Note that the relative positional relationship between the intake port 4c, the stirring member 4e, and the opening 4b in the above description is important, and for example, if the distance is too small, the air flow will flow between the flipped up grains rather than say. , It becomes a short-circuited form,
On the other hand, if it is too large, the flow path resistance increases and the air flow rate decreases, resulting in a decrease in dust separation efficiency. At least the shortest distance D1 between the intake port 4c and the stirring member 4e, and the stirring member 4e
It is desirable that the shortest distance D2 between the opening 4b and the opening 4b be at least twice the distance S between the case 4a and the peripheral edge of the screw shaft 4d.

Also, the lower dust pipe 5 is vertical, and the upper dust pipe 7
It is not essential to the invention that the is connected to the separation chamber from above. For example, it is needless to say that the dust removal effect can be obtained even if they are connected in the respective inclined directions.

[Effects] The invention of this application has the following effects due to the configuration as described above.

In other words, it has the same power as before, but 20%
Dust can be efficiently separated by collecting and separating a large amount of dust as described above, and the grains become clean, which facilitates post-process treatment.

Suctioning out high quality grains is 1/2 compared to the conventional method
It became the following, and waste was reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention by partially cutting away, 2 is a storage chamber, 3 is a grain elevator, 4 is a horizontal conveyor, 4a is a case, 4b is an opening, 4c Is an intake port, 4d is a screw shaft, 4e is a stirring member, 5 is a lower dust collector, 6 is a separation chamber, 7 is an upper dust collector, 8 is a suction blower, and 9 is a motor.

Claims (1)

[Scope of utility model registration request] 1. A dust-exhausting device for a grain dryer, characterized by comprising each of the following constitutions A to G. A. A main body consisting of a storage chamber for storing grains, a drying chamber for continuously contacting the grain with a drying air and a grain collecting chamber for collecting and laterally transporting the grains flowing down from the drying chamber, and the grain collecting chamber A horizontal conveyor that is installed across a grain lifting machine for lifting grains from B., B. an agitating member provided at a proper position on the screw shaft that forms the horizontal conveyor, C. behind the agitating member in the conveying direction At the upper part of the outer wall of the horizontal conveyor, D. Lower dust collector connected to the front of the stirring member of the horizontal conveyor (on the grain advancing direction side), E. A dust separation chamber connected to the dust chamber, F. an upper dust chamber connected to the separation chamber with a center line different from that of the lower dust chamber, G. a suction blower connected to the other end of the upper dust chamber .