JPH0335423Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a method for sorting large grains and separating small waste grains by feeding grains such as rice and wheat from the bottom to the top in a sorting cylinder set upright. Regarding vertical grain sorting machines,
The waste grain sorting rate can be changed as appropriate.

Prior Art A structure in which a vertical grain sorter is used to change the waste grain sorting rate is known from Japanese Utility Model Application Publication No. 8485/1985 filed by the present applicant.

This known structure has a waste particle return port that returns the waste particles to the particle receiving tube and a waste particle discharge port that discharges the waste particles to the outside of the machine, at the bottom of the waste particle receiver that receives the waste particles leaking from the sorting tube. The amount of waste discharged from the waste discharge port and the amount of waste returned from the waste return port to the receiving tube are determined by adjusting the opening degree of the waste return port and waste discharge port to a wide or narrow range. By adjusting the amount of waste grains and returning a certain amount of waste grains to the receiving cylinder, an appropriate sorting rate can be achieved.

Problems to be Solved by the Invention In the above-mentioned known structure, the waste reduction port and the waste discharge port may become clogged with waste particles, making it impossible to change the sorting rate. Therefore, the present invention aims to make the flow of waste grains smooth so that clogging does not occur and the sorting rate can be changed reliably.

Means for solving the problem Sorting tube 2 that accommodates the conveyor 1 for sending and lifting grains
A vertical grain container is provided with a waste grain receiver 3 around the lower part of the machine to receive the waste grains leaking from the sorting tube 2, and a scraper 4 for scraping out the waste grains accumulated in the waste grain receiver 3 to the outside of the machine. In the sorting machine, a waste particle return path 5 which communicates with the waste particle receiver 3 from the side and returns the waste particles into the sorting cylinder 2, and a waste particle removal path 6 which takes out the waste particles to the outside of the machine are provided. A passage switching valve 7 that rotates to change the opening degree of both passages 5 and 6 is provided at the branching point between the return passage 5 and the waste removal passage 6. An overflow gap 8 leading to the waste removal passage 6 is formed on the rear side of the figure.

Function of the device The waste particles leaking from the sorting cylinder 2 and collecting in the waste particle receiver 3 are transferred to the waste particle return path 5 by the feeding action of the scraper 4.
Most of the waste particles are sent to the switching valve 7 side provided at the front of the scraping tool 4 in the feeding direction A, and the waste particles are sent to the switching valve 7 side, The amount of waste particles returned to the sorting cylinder 2 can be changed according to the angle. In addition, if there is a large amount of waste particles, they are removed from the machine through an overflow gap 8 formed on the rear side of the switching valve 7 with respect to the feeding direction A of the scraping tool 4 through the waste removal passage 6. It will be discharged.

Effects of the invention As mentioned above, the flow of waste particles is smooth, and the amount of waste particles returned to the sorting tube 2 can be changed immediately by adjusting the switching rotation angle of the switching valve 7, and when a large amount of waste particles are generated, A part of the waste particles is discharged from the overflow space 8 to the outside of the machine, and no clogging occurs.

Example Next, an embodiment of the present invention will be described.

The overall structure of the vertical grain sorter is shown in FIG.

A grain receiving cylinder 11 is installed upright on a base 10 horizontally disposed inside the cylindrical shell 9, and a cylindrical sorting cylinder 2 is rotatably installed on the upper part of this grain receiving cylinder 11. A conveyor 1 passing through the tube 11 and the sorting tube 2 is fitted and installed vertically so as to rotate in the opposite direction to the sorting tube 2.

The sorting tube 2 has an upper tube 13 which is covered from the top to the bottom and has a discharge window 12 in the peripheral wall.
and a perforated cylinder 1 with a large number of screening holes 14 in the peripheral wall.
5 and a bottomless lower cylinder 16 are integrally connected.

The conveying body 1 is a cylindrical body with a spiral conveying surface protruding from the outer periphery, and has the function of sending and lifting grains and pressing them against the inner circumferential surface of the sorting cylinder 2 by centrifugal force.

A sorting tube 2 is provided in the inner cavity on the base 10 inside the shell 9.
A grain regulating receiver 17 is provided surrounding the lower periphery of the upper tube 13, and a waste particle receiver 3 is provided surrounding the lower periphery of the porous tube 15.

Scraping tools 18 and 4 protruding from the sorting cylinder 2 side, respectively, run around the upper part of the grain sorting receiver 17 and the waste grain receiver 3.
The sorted grains discharged from the discharge window 12 are scraped into the tank 19, and the waste grains leaking from the sorting hole 14 are scraped to the waste grain removal section.

The waste take-out section includes a waste chute 20 that communicates from the waste receiver 3 to the side of the shell 9. The return path 5 and the waste removal path 6 for discharging waste particles to the outside of the machine are branched, and a switching valve 7 is provided at this branch, and by rotating a handle 21 connected to the switching valve 7, the waste particles can be removed. The route is changed accordingly. This switching valve 7 is located on the rear side with respect to the rotational feeding direction A of the scraping tool 4, and has a gap of 8 between it and the inner wall of the chute.
is formed so that some of the waste particles are discharged outside the machine. Further, nets 22 and 23 are provided below the waste grain return path 5 and the waste grain removal path 6, so that the bran discharged from the waste grain receiver 3 falls together with the waste grains. This mesh body 23 vibrates when the switching valve 7 collides with the switching valve 7 when the switching valve 7 is switched, and the bran adhering to the mesh is removed.

In this embodiment, the scraping tool 4 rotates together with the sorting tube 2, but when the sorting tube 2 is not rotated, the scraping tool 4 is rotated independently.

A gearbox 24 for rotating the sorting tube 2 and the conveyor 1 in opposite directions is provided below the base 10 within the shell 9, and the gearbox 24 is driven by a motor 25 and a belt 26.

Next, the state of the grain sorting process in this example will be explained.

When grains are thrown into the grain receiving tube 11 from the charging hopper 27, the grains are scooped up onto the transporting surface of the transporting body 1 and sent upward. While the grains pass through the perforated cylinder 15, the grains are pressed against the inner peripheral surface of the perforated cylinder 15, and waste grains smaller in diameter than the sorting hole 14 leak out to the outside and accumulate on the waste grain receiver 3. . These waste particles are scraped to the waste removal section by the scraper 4, and depending on the position of the switching valve 7, an appropriate amount is returned to the waste receiving tube 11 through the waste return path 5, and the remainder is removed as waste. The grains are discharged outside the machine through the grain removal passage 6.

The waste grains returned to the grain receiving tube 11 mix with the unsorted grains supplied from the input hopper 27, increasing the waste grain content and reducing the sorting rate to an appropriate value. It is.

Large-diameter particles are sorted by rising inside the sorting tube 2 and passing through the discharge window 1.
2 onto the sorting receiver 17 and scraped into the tank 19 by the scraping tool 18.

The grains in the tank 19 are sorted and packed into bags by opening and closing a shutter 28 provided at the outlet thereof as appropriate.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is a partially enlarged front sectional view, FIG. 2 is a partially enlarged plan sectional view, and FIG. 3 is an overall side sectional view. 1... Conveyor, 2... Sorting cylinder, 3... Waste grain receiver,
4... Scraping tool, 5... Waste particle return path, 6... Waste particle removal path, 7... Channel switching valve, 8... Overflow gap, A... Feeding direction.

Claims (1)

[Scope of utility model registration request] A sorting tube 2 that accommodates a conveyor 1 for sending and lifting grains
A vertical grain container is provided with a waste grain receiver 3 around the lower part of the machine to receive the waste grains leaking from the sorting tube 2, and a scraper 4 for scraping out the waste grains accumulated in the waste grain receiver 3 to the outside of the machine. In the sorting machine, a waste particle return path 5 which communicates with the waste particle receiver 3 from the side and returns the waste particles into the sorting cylinder 2, and a waste particle removal path 6 which takes out the waste particles to the outside of the machine are provided. A passage switching valve 7 that rotates to change the opening degree of both passages 5 and 6 is provided at the branching point between the return passage 5 and the waste removal passage 6. A sorting rate changing device for a vertical grain sorting machine, characterized in that an overflow gap 8 leading to a waste grain removal passage 6 is formed on the rear side of A.