JPS6374823A - Receiving dust collector - Google Patents

Abstract

PURPOSE:To prevent wasteful operation at the time of a trace quantity of grains and a suction loss of these grains at the time of its fullness from occurring, by performing dust collecting operation only at a time when a good many grains exist between grains sensors installed in both upper and lower parts of a receiving hopper, in case of a grain drying plant. CONSTITUTION:Each dust collecting air pipe 5 is installed in each upper part of receiving hoppers 1 and 2 for source grains, and these dust collecting air pipes 5 are interconnected to dust collecting ducts 6, 7 and 9. And, each upper and lower part of these hoppers 1 and 2, there are provided with grain sensors 21-24, and only at a time when these source grains exist among upper and lower sensors 21-24, dust collection by a dust collecting fan 8 takes place. That is to say, if the grain sensor 22 operates, a selector valve 10 is opened, whereby dust inside the hopper 1 is discharged to the outside of a machine by way of the dust collecting air pipe 5, the dust collecting duct 6 and the aggregate dust collecting duct 9. However, if the grain sensor 21 at the upper part of the hopper 1 is in a state of being operated, the selector valve 10 becomes closed, so dust collection from the hopper 1 is stopped. In case of the hopper 2, it is the same.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a receiving dust collection device in a grain drying facility or the like.

[Prior Art and Problems to be Solved by the Invention] When loading raw grain into the receiving hopper, dust is thrown up, so a dust collection air pipe is installed above the hopper and a dust collection duct is installed to remove the dust by suction. The dust is collected at an appropriate location through the filter.

However, conventionally, regardless of the presence or absence of raw material grains or the input amount,
Since the dust collector is constantly operated during cargo reception, when there is only a small amount of raw grain, the amount of dust is small and the dust collection operation is wasteful, and when the grain is full, the grain itself is sucked in, resulting in loss.

[Means for Solving the Problems] This invention provides a grain drying facility in which dust collecting air pipes 5, 5, . 5.5... are communicated with the dust collection duct 6°7.9, and grain detection sensors 21 to 24 are provided at the upper and lower portions of the receiving hopper 1°2, respectively, and the raw material grains are detected by these upper and lower sensors 21 to 24. The cargo receiving dust collection device is configured such that it can collect dust only when the dust exists between the two.

[Operations and Effects of the Invention] The dust removal operation from the dust collection wind pipe is performed only when grains in the receiving hopper are present within a certain range.

In other words, grain detection sensors are installed above and below inside the receiving hopper,
When the temperature drops below the lower sensor, the dust collection operation is stopped, and when it reaches the upper sensor, the dust collection operation is also stopped.

For this reason, when the receiving hopper is substantially empty or substantially full, there is no dust collection action from the dust collecting air pipe, which eliminates the drawback described at the beginning.

[Example] An embodiment of this invention will be described based on the drawings.

Reference numeral 1.2 denotes a receiving hopper, and its upper input port is covered with partition frames 3 and 4 that form a space for grains to fall. A plurality of dust collecting air pipes 5, 5, . . . are arranged close to the bottom of each of these partition frames 3, 4 and located above each receiving hopper 1, 2, respectively. The dust collecting air pipes 5.5... are collected for each receiving hopper and connected to a dust collecting duct 6.7. Furthermore, these dust collecting ducts 6 , 7 are connected to a collecting dust collecting duct 9 which leads to a dust collecting fan 8 . A switching valve 10.11 is provided at the connection part from each dust collection duct 6.7 to the collection dust collection duct 9, and the passage can be opened or closed by the expansion and contraction operation of the air cylinder mechanism 12.13. . 14 is a motor that rotates and interlocks the dust collection fan 8.

On-off valves 15 and 16 are provided at the bottom of each of the receiving hoppers 1 and 2, and are opened and closed in conjunction with the operation of air cylinder machines [17 and 18]. 19.20 is a belt conveyor provided below each receiving hopper 1.2 to transport the received grain toward a processing machine such as a drying section.

Grain detection sensors 2 are installed in the upper and lower parts of the receiving hopper 1.
Similarly, a sensor 23 is provided on the receiving hopper 2 side.
, 24 are provided. These sensors 21 to 24 are linked to drive and stop the dust collection fan 8, and are connected to the switching valves 10 and 1.
1 is configured to open and close in a fixed order.

The action of the upper side will be explained.

When grain is put into the receiving hoppers 1 and 2, the air cylinder mechanism 17 or 18 is activated and the on-off valve 15 or 16 is opened.
The grain in the hopper flows down to the lower belt conveyor 19.
20 and is transported appropriately. When the amount of grain in the receiving hoppers 1 and 2 becomes small or empty, new grain is introduced.

During the above cargo receiving operation, the dust collection fan 8 operates to suction and remove the dust inside the hopper. This will be explained according to the flowchart in FIG. 1. When grain is placed in either the receiving hopper 1 or 2, the grain detection sensor 22 or 24 is activated and the dust collection fan 8 is activated. When the grain detection sensor 22 is activated, the switching valve 10 is opened, and the receiving hopper 1
The dust inside is discharged to the outside of the machine through the dust collection air pipes 5, 5, . . . , the dust collection duct 6, and the collection dust collection duct 9. However, when the grain detection sensor 21 on the upper part of the receiving hopper 1 is activated, the switching valve 10 is closed, and dust collection from the receiving hopper 1 is stopped. This is because the receiving hopper 1 is almost full, so when the dust collection operation is performed, the grain itself is sucked in, resulting in loss. On the other hand, the grain detection sensor 24 in the rice cooker 2
When operated, the switching valve 11 is opened, and the dust in the hopper 2 is discharged to the outside of the machine via the dust collection air pipes 5.5, the dust collection duct 7, and the collection dust collection duct 9. In addition, when the upper grain sensor 23 is in a full state, the switching valve 11 is activated.
is closed, and dust collection from the receiving hopper 2 is stopped.

The above-mentioned dust collection operation is repeated while grains are fed into the receiving hoppers 1 and 2 alternately or simultaneously to perform cargo receiving work. Therefore, in a substantially full state or an empty state (or a very small amount), the on-off valves 10, 11 are closed, thereby reducing wasteful operation and loss of grain.

The installation direction of the dust collecting air pipes 5, 5... may be perpendicular to the transfer direction of the outer rut conveyor 19, 20 as shown in Fig. 3, or in a parallel direction as shown in Fig. 4. may be provided. When installed in parallel, it is convenient because the grain being transferred on the conveyor can be checked at a fixed position above.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a partial side view, and FIG. 3 is a partial plan view.
FIG. 4 is a plan view of another embodiment, and FIG. 5 is a flow diagram. In the figure, 1 and 2 are receiving hoppers, 5, 5... are dust collecting wind pipes,
6 and 7 are dust collection ducts, 8 is a dust collection fan, 9 is a collecting dust collection duct l~, 10.11 is a switching valve, 19 and 20 are belt conveyors, 21.23 is (upper) grain detection sensor, 22, 2
4 (bottom) indicates a grain sensing sensor.

Claims (1)

[Claims] At grain drying facilities, etc., receiving hoppers 1 and 2 for receiving raw grain
The dust collecting air pipes 5, 5... are arranged in parallel at the upper part of the section, and the dust collecting air pipes 5, 5... are connected to the dust collecting ducts 6, 7, 9, and the receiving hoppers 1, 2 are connected to each other. Grain detection sensors 21 to 24 are provided in the upper and lower parts, respectively, and raw grains are detected by these upper and lower sensors 2.
A cargo receiving dust collection device which is provided so as to be able to collect dust only when the dust exists between 1 and 24.