JPS6142073Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a circulating grain dryer, and in particular to a lower conveyor of a circulating grain dryer that conveys grain sent from a screw conveyor to the entrance of an elevator. Regarding equipment.

[Conventional technology]

Conventional circulating grain dryers generally have a
As shown in the figure (see Utility Model Application Publication No. 54-164970), a storage section 1 for temporarily storing grains is provided in the upper part of the main body A, and the grains in the storage section 1 are allowed to flow down into the lower part of the storage section 1 little by little. A ventilation drying section 2 for drying by blowing drying air (hot air) is installed in series, and an elevator 3 is installed at the rear or front outside of the main body A to lift up the grains that have flowed down and return them to the storage section 1. It was established. In addition, the ventilation drying section 2 has a plurality of narrow grain flow passages 4 formed in parallel in the lower part of the storage section 1, and drying air supply passages 5 on both sides of each flow passage 4.
and an exhaust passage 6 are provided. At the top of each flow path 4, so that grains can smoothly flow down from the storage section 1,
A constricted portion 41 having a funnel-shaped cross section is formed.

A distribution device (not shown) installed at the top of the storage section 1 and a screw conveyor 8 installed at the bottom of the main body A are arranged approximately at the center in the width direction of the main body A, and a hot air generator ( The elevator 3 is arranged closer to the center of the main body A by deviating the installation positions of the exhaust fan 7 (not shown) in opposite directions from the center of the main body A in the width direction.

[Problem that the invention attempts to solve]

By the way, the connection positions of the grain flow path 4, the drying air supply path 5, the air exhaust path 6, the hot air generator and the air exhaust fan 7, as well as the screw conveyor for conveying the grains flowing down from the ventilation drying section 2 to the elevator 3 side. - If the installation position of the conveyor 8 is made plane symmetrical with respect to the center plane of the main body A, the manufacturability of the main body A will be improved, drying will be uniform, and the height of the main body A will be reduced, which is very preferable.

However, in the case where the distribution device and the screw conveyor 8 are disposed at the center of the main body A in the width direction, the elevator 3 cannot have its upper and lower connecting parts far away from both of the above, and is placed in the center of the main body A. I had no choice but to place it. The reason for this is that if the elevator 3 is moved and placed in the width direction from both of the above, the elevator 3
The connecting portion between the above-mentioned two is long, and since the connecting portion must be maintained above the angle of repose, a large head difference is required between both ends of the connecting portion. In other words, for conventional equipment,
Since the bottom surface of the grain flow cylinder 10, which is the connecting part, is only a flat slope as shown in FIG. As a result, the overall height of the device increases, resulting in the disadvantage that the building that houses it becomes taller.

Therefore, as described above, by arranging the distribution device and the screw conveyor 8 in the center of the main body A, and by deviating the installation positions of the hot air generator and the blower 7 in opposite directions from the center in the width direction, the elevator 3 was moved as close to the center of main body A as possible to prevent elevator 3 from leaving the center of main body A, but (because the hot air generator and exhaust fan 7 are quite large, (This is because if they are placed closer to the center, they cannot be installed in the center.) However, if they are placed in this way, the structure inside the main body A cannot be partially maintained in plane symmetry, so the ease of manufacture cannot be maintained sufficiently. This did not solve the problem, and there was a drawback in that a new difficulty was created in terms of uniformity of drying.

[Purpose of invention]

Therefore, the purpose of this invention was made in view of the above-mentioned drawbacks.Even if the screw conveyor and elevator are separated, the structure can be simplified, the head can be reduced, and the overall height of the device can be lowered, and it can be manufactured easily. The present invention also provides a lower conveying device that can achieve uniform drying and convey grain without stagnation.

[Means for solving problems]

In order to achieve this purpose, this invention connects the bottom wall of the grain cylinder connecting the exit of the screw conveyor and the entrance of the elevator with a gutter section having an arcuate cross section, and a screw conveyor in the connecting direction of the gutter section. It consists of a flip-up slope that extends to a higher position than the shaft, and a falling slope that is connected to the flip-up slope and is connected to the elevator at an angle greater than the angle of repose of the grain. It is characterized by being wider than the outlet side.

[Effect]

According to the structure of this invention, the grain sent by the screw conveyor is thrown up by the sending blades onto the wide flip-up slope of the flow grain tube, and is conveyed along the flow down slope to the elevator. However, since the peaks of the upward and downward slopes of the grain tube are located higher than the axis of the screw conveyor, the head difference at both ends of the grain tube can be considerably reduced, and the grain can be removed at the entrance and exit sides of the grain tube. can be transported to the elevator without stagnation.

〔Example〕

Embodiments of this invention will be described in detail and specifically below based on the drawings.

2 to 5 show an embodiment of this invention, and parts common to those in FIG. 1 are given the same reference numerals and their explanations will be omitted. An outlet 11 is provided at the lower rear surface of the main body A, through which the terminal end of the screw conveyor 8 projects toward the rear of the main body A, and a radially extending feed vane 81 is attached to the end. Then, the elevator 3 is arranged in correspondence with the sending blade 81. That is, an elevator casing 31 is erected to the left of the center of the main body A, slightly apart from the rear wall of the main body A, and an upper pulley (not shown) and a lower pulley 32 for the bucket belt are installed above and below the elevator casing 31. A bucket belt 34 equipped with a large number of bucket belts 33 is stretched endlessly between both pulleys. The lower pulley 32 is provided slightly lower than the screw conveyor 8. The feed blade 8 is located at the bottom of the elevator housing 31.
An inlet 35 is provided on the surface facing 1, and this inlet 3
5 and the outlet 11 on the side of the main body A, including the protruding portion of the screw conveyor 8 (from the main body A), are connected by a grain barrel 13.

The bottom wall of this flow grain barrel 13 is bent into a mountain shape that slopes back and forth in the grain transfer direction, and the flip-up slope 1
It is divided into two slopes: 41 and a downstream slope 142. The angle of inclination of the downward slope 142 is approximately 34 degrees, which is larger than the angle of repose of the grain, and the angle of inclination of the upward slope 141 is approximately 45 degrees. And the flip-up slope 141
The apex of the downward slope 142 is set at a higher position than the axis of the screw conveyor 8. The portion following the flip-up slope 141, that is, the portion below the feed blade 81, is curved to have an arcuate cross section to form a gutter portion 143, which is formed along the rotation locus of the tip of the feed blade 81. The flip-up slope 1 for this gutter part 143
41 extends in the connection direction of the gutter portion, and its tip is connected to the downstream slope 142.

Further, the back wall 15 of the grain barrel 13 is the rear wall 1 of the main body A.
It is installed diagonally with respect to 6, and widens toward the screw conveyor 8 side, making the inlet side of the grain flow cylinder 13 wider than the outlet side. A motor 17 is disposed in the space below the chevron-shaped bottom wall 14 of the grain barrel 13, and is connected to the drive pulley 36 of the elevator 3 and the drive pulley 8 of the screw conveyor 8 by means of a belt 18.
Connect to 3.

The operation of this invention will be explained below.

The grains flowing down from the ventilation drying section 2 are carried out from the main body A by the screw conveyor 8, are thrown up by the sending blades 81, and then flow down along the downward slope 142 to reach the lower part of the elevator 3.
Here, in this invention, the bottom wall 14 of the grain flow tube 13 is bent into a mountain shape as described above, and is divided into two slopes, the upward slope 141 and the downward slope 142, and the apex of these two slopes is connected to the axis of the screw conveyor. Because it is set higher, even if the grain flow tube 13 is long, the inclination angle of the flow slope 142 is maintained above the angle of repose, and the drop at both ends of the flow grain tube 13 is compared to the conventional device in which the bottom wall is a flat slope. The overall height of the device is reduced.

In addition, the grains flowing down by the ventilation dryer 2 are not constant, but are sent intermittently by the opening and closing operation of the pulp 21 provided at the lower part of the ventilation drying section 2, and when the valve 21 is opened, the - A large amount of grain is sent out at once by the conveyor 8, but even in this case, in this invention, the inlet side of the flow grain tube 13 is made wider than the outlet side, so that the area of the flip-up slope 141 is widened. Because of this, the grain can be thrown up over a wide range in the longitudinal direction of the screw conveyor 8, and the grain can be thrown up over a wide range in the longitudinal direction of the screw conveyor 8.
3. No clogging phenomenon occurs at the inlet.
Furthermore, in the present invention, by reducing the head difference between both ends of the grain flow cylinder 13, the flow slope can be connected to a position higher than the bottom surface of the elevator, so that grains can be prevented from stagnation at the lower part of the elevator 3.

In addition, the exhaust fan 7, hot air generator, screw conveyor 8, etc. can be placed in the center of the main body A, and the symmetry of the main body A can be maintained, making it easier to manufacture and ensuring uniform drying. It can have a sexual effect. In addition, as in the embodiment, the bottom wall 1
If the gutter section 143 under the protruding portion of the inner screw conveyor 8 of 4 is curved to have an arcuate cross section so as to follow the rotation locus of the tip of the feed blade 81, the efficiency of hoisting up the grains will be improved. Note that the distribution device connected to the upper part of the elevator 3 can be installed on the top of the storage section 1 in any direction, so it will not be hindered even if the arrangement position of the elevator 3 is changed.

[Effect of idea]

As is clear from the detailed explanation above, according to this invention, there is an outlet of the screw conveyor that sends the grains flowing down from the ventilation drying section to one side of the main body;
In a circulation type dryer, the outlet is connected to the inlet of an elevator provided on the side by a flow grain cylinder, and the screw conveyor is provided with feeding blades extending in the radial direction at the terminal end thereof, and the bottom wall of the flow grain cylinder is a gutter portion with an arcuate cross section located at the lower part of the feed blade; a flip-up slope connected to the gutter portion and extending in the connection direction thereof to a position higher than the axis of the screw conveyor; It consists of a downward slope that is connected to the slope and connected to the lifter at an angle greater than the angle of repose of the grain, and the inlet side of the flow grain tube is directed from the outlet side in the axial direction of the screw conveyor. Since it is formed wide, it is possible to reduce the head difference between both ends of the grain flow tube, lowering the overall height of the device, and prevent grain from stagnation at the entrance of the flow grain tube and the lower part of the elevator. In addition, the symmetry of the main body can be maintained, which has the effect of facilitating manufacturing and making drying uniform.

[Brief explanation of the drawing]

FIG. 1 is a rear view showing a conventional circulating grain dryer, FIG. 2 is a rear view showing a circulating grain dryer to which the present invention is applied, and FIG. 3 is a longitudinal cross-sectional view showing the lower conveying device of the same machine. FIG. 4 is a cross-sectional view of the same, and FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 3. A... Main body, 1... Storage section, 2... Ventilation drying section, 3... Elevator, 8... Screw conveyor, 81... Feed blade, 10... Grain cylinder, 11...
...Exit, 12...Inlet, 14...Bottom wall, 141...
...Spring slope, 142...Downward slope, 143...
...Hibe.

Claims (1)

[Scope of utility model registration request] The exit of the screw conveyor that sends the grain flowing down from the ventilation drying section to one side of the main body and the entrance of the elevator installed on the side of the exit are connected by a grain cylinder, and the end of the screw conveyor has a radius In a circulating grain dryer equipped with a feed blade extending in the direction, the bottom wall of the flow grain barrel is connected to a gutter portion having an arcuate cross section located at the lower part of the feed blade, and connected to the gutter portion to form a tangent thereof. It consists of a flip-up slope that extends in the direction and extends to a position higher than the axis of the screw conveyor, and a falling slope that is connected to the flip-up slope and connected to the elevator at an angle greater than the angle of repose of the grain. Also, a lower conveying device in a circulating grain dryer, characterized in that the inlet side of the grain cylinder is formed wider in the axial direction of the screw conveyor than the outlet side.