JPH04358575A - Removing equipment for chip of stone in grain - Google Patents

Abstract

PURPOSE:To obtain an equipment for smoothly removing chips of stone from grain. CONSTITUTION:Numberless air injecting holes 16 and projections 17, a grain takeout port 37 of a rear end part and the takeout 24 of chips of stone in a front end part are formed to a sorting frame 10 having a bottom face 15. Air is blown from the rear surface side of the sorting frame 10. Grain (b) supplied to the upper surface side of the bottom face 15 is floated to the specified height 19 by wind blown up through the air injecting holes 16. The space 45 is formed between the bottom face 15 and the rear surface 46 of a floated layer. The bottom face 15 is obliquely vibrated in the backward and forward directions. Chips (a) of stone having large specific gravity fall on the bottom face 15 and are thrust away by the projections 17 and moved through the space 45 and taken out from the takeout port 24. In this removing equipment for chips of stone, a blowing device provided to the rear surface side of the sorting frame 10 is constituted of an axial flow type turbo fan 8.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing stone debris from grain.

0002

[Prior Art] Conventionally, as shown in FIG. 1, the lower surface of a sorting frame has a bottom surface C that has numerous blowholes A and protrusions B, a grain outlet at the rear end, and a stone waste outlet at the front end. Air is blown from the side to float the grains b supplied to the upper surface of the bottom surface C to a certain height D by the wind blowing up from the blowhole A, and between the bottom surface C and the lower surface E of the floating grain layer. A space F is formed, and the bottom surface C is tilted and vibrated in the front-rear direction.
A stone debris removal device is known in which the heavy stone debris a that has fallen to the top is thrown off by the protrusion B, moved within the space F, and taken out from the stone debris outlet. The air blower on the lower side of the sorting frame of the known stone debris removal device is as follows:
An axial plate fan G as shown in FIG. 4 and a cross-flow sirocco fan H as shown in FIG. 5 were used.

0003

[Problems to be Solved by the Invention] The disadvantage of the stone debris removal device using the axial flow plate fan G shown in FIG. If the bottom surface C is tilted and vibrated in the front-back direction and the heavy stone debris a that has fallen onto the bottom surface C is thrown away, the stone debris a will look like the arrow (a). Lower surface E
It collides with the lower surface E, which hangs down low, and scatters.
The problem is that the amount of movement (flying distance) of the stone chips a is short and efficiency cannot be improved.

The disadvantage of the stone debris removal device using the cross-flow sirocco fan H shown in FIG. 5 is that the wind is weak, so the bottom surface E of the floating grain layer is flat as shown in FIG. When stone chips a with a heavy specific gravity that fall onto the bottom surface C by tilting vibration in the front-back direction are thrown away with the protrusion B, the stone chips a collide with the lower surface E and become disorderly, as shown by the arrow (b). The problem is that the amount of movement (flying distance) of stone chips a is short and efficiency cannot be improved.

[0005]

[Means for Solving the Problems] Therefore, the present invention provides numerous blowholes 16 and protrusions 17 and a grain outlet 37 at the rear end.
and a bottom surface 15 forming a stone waste outlet 24 at the front end.
Air is blown from the bottom side of the sorting frame 10 having a
The grain b supplied to the upper surface side is floated to a certain height 19 by the wind blowing up from the blowhole 16 to form a space 45 part between the bottom surface 15 and the lower surface 46 of the floating grain layer, and the bottom surface 15 in the front-rear direction, the stone chips a having a heavy specific gravity that have fallen to the top of the bottom surface 15 are thrown off by the protrusion 17, moved within the space 45, and taken out from the stone chip removal port 24. The blowing device provided on the lower surface side of the sorting frame 10 is an axial flow type turbo fan 8, which serves as a device for removing stone debris from grains.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 3 and 6 to 8. Reference numeral 1 denotes the entire case, which is formed in a substantially sealed state. The shape of the case 1 is such that the longitudinal section is a long rectangle long in the front and back sides, and the cross section is also a long rectangle long in the front and back sides. The case 1 is divided into two parts, a lower case 2 and an upper case 3. There is a trash can 4 for rice bran, etc. on the lower front side of the lower case 2.
is attached removably. The top surface of the trash can 4 is open, and during stone removal work, blown-in dust such as bran powder is guided by a guide plate 5 and flows into the trash can 4. A motor 6 is installed behind the trash can 4. A wind turbine case 7 is provided behind the motor 6, and an axial flow type turbo fan 8 is installed inside the wind turbine case 7.

As mentioned above, the axial flow plate fan G shown in FIG. As is well known, the rotation is slow and flops around, making it impossible to blow air uniformly. There was also a cross-flow sirocco fan shown in Fig. 5, but although this fan could blow air uniformly, it was inefficient because the wind was weak.

The present invention uses an axial flow turbo fan 8 (turbo fans and sirocco fans have opposite blade curvature directions) so that the wind is uniform and powerful. The periphery of the wind turbine case 7 parallel to the axis is surrounded, and the suction port 47 is opened only on one side of the side surface. Since the embodiment shown in FIG. 6 assumes a small axial flow type turbo fan 8 with a diameter of about 10 cm, two turbo fans 8 are installed side by side, and a suction port 47 is provided on one side of each fan.

The wind turbine case 7 expands in the front-rear direction as it reaches the top, but the opening 9 on the top surface of the wind turbine case 7 is
The width tapers from the center to the front end. The opening 9 is horizontal in the left-right direction, but has a slope that is low on the rear side and high on the front side in the front-back direction.

A sorting frame 10 is provided on the upper surface of the opening 9 and vibrates violently in diagonal directions. The sorting frame 10 is
The lower end is pivoted to the upper end of the inclined support rods 11, 11 which are pivoted to the upper side of the wind turbine case 7, and the upper end of the rod 13 of the eccentric cam 12 attached to the wind turbine case 7 side is attached. . The eccentric cam 12 is rotated by the rotation of the motor 6 and vibrates the sorting frame 10 via the rod 13. The vibration of the sorting frame 10 in the embodiment of the present invention is
The vibrations are as small as 3 mm or 3 mm. In the conventional method, the vibration was as large as 10 mm or 15 mm, so during stone removal work, the stone chips a were thrown too strongly, colliding with the lower surface 46 of the floating grain layer and being reflected diffusely, reducing the flight distance. Rather, the time required for the stone chips to reach the outlet 24 was delayed, resulting in inefficiency. In the embodiment of the present invention, the amplitude is set to a small vibration of about 2 mm or 3 mm, so that the stone chips a do not collide with the lower surface 46 of the floating grain layer, so that the flight distance is increased.

[0011] The sorting frame 10 has a side wall 14 whose front side narrows in a C-shape on both left and right sides, and a bottom surface 15, and the bottom surface 15 has numerous blowholes 16.
It is turned up and has a high protrusion 17 on the front side.

The two axial flow type turbo fans 8 rotate at high speed and the air blows up from the blowhole 16, so that when the grains are dropped from the upper supply hopper 18, the grains flow into the blowhole 1.
6 is lifted by the wind blowing up, and as shown in FIG.

[0013] The following is a structure outside the gist, but the bottom surface 1
The front and rear inclination angles of the opening 5 are the same as the opening 9, and the angle cannot be adjusted. An adjustment plate 20 whose inclination angle can be adjusted is provided on the front side of the bottom surface 15 via a shaft attachment part 25 . Side walls 21 are provided on both left and right sides of the adjustment plate 20, and a cover 22 is placed on the top of the side walls 21. The front side of the cover 22 gradually descends to form a bent wall 23, and a stone debris outlet 24 is formed between the front end of the adjustment plate 20 and the lower end of the bent wall 23. The stone waste outlet 24 communicates with a stone falling part 35. Reference numeral 36 denotes a return pipe disposed above the sorting frame 10, one end opening of which faces the front position of the stone waste outlet 24, and the other end opening facing the grain outlet 37 of the sorting frame 10.

The left and right widths of the bottom surface 15 are formed to be approximately the same width from the rear side to the intermediate position, but gradually become narrower from the intermediate position to the front side. The connected adjustment plates 20 have a narrow width. A screw tube 26 is provided on the upper surface of the cover 22, and an adjustment screw 27 provided on the sorting frame 10 side is screwed into the screw tube 26. Reference numeral 28 denotes a sub-wind turbine case provided below the adjustment plate 20, and a sub-wind turbine 29 is provided within the sub-wind turbine case 28. 3
0 is the upper opening of the auxiliary wind turbine case 28, and the adjustment plate 20
Facing the bottom side.

Reference numeral 31 denotes a switching valve which is configured to be rotatable as a part of the outer wall of the air passage of the auxiliary wind turbine 29, and the upper end of the switching valve 31 is pivotally supported by a shaft 32. An arm 33 is fixed to the shaft 32, and when the arm 33 is moved up and down, the direction of the wind from the auxiliary wind turbine 29 is changed. That is, the pinion 42 fixed to the motor 41
When the rack 43 is moved up to the maximum by rotating the arm 33, the arm 33 loosely connected to the rack 43 rotates upward around the shaft 32, and the switching valve 31 moves the shaft 32 from the position shown in FIG. It rotates to the left around the center and directs all of the wind from the secondary windmill 29 to the upper opening 30.
The air is blown to the side and is blown onto the adjustment plate 20. Then, sorting frame 1
Grain that has been pushed from the bottom surface 15 of 0 and moved to the adjustment plate 20.
The stone chips are returned onto the bottom surface 15 of the sorting frame 10 by the wind. When the arm 33 is set horizontally between the upper and lower sides as shown in FIG.
The air is blown from the air to the adjustment plate 20, and the remaining air blows up the stone falling part 35 on the front side of the switching valve 31. In this state, the stone falling part 35
If there is grain, etc. with a light specific gravity, it can be blown back. When the arm 33 moves to the lowest position, the switching valve 31 rotates clockwise from the position shown in FIG. 3 to connect the air outlet 34 to the stone falling part 35. Therefore, the wind from the secondary wind turbine 29 is transmitted through the upper opening 30.
Since the air does not blow up into the stone debris outlet 35 and blows only towards the stone falling area 35, a large amount of air is blown into the stone falling area 35, and the grains b that have fallen from the stone waste outlet 24 pass through the return pipe 36 and enter the grain outlet 37. be returned. In addition, in the figure, 38 is an upper switch, 39 is a center switch, 40 is a lower switch, and 44 is a stone waste storage box.

[0016]

[Effect] Next, the effect will be described. Stone chips a from the supply hopper 18
When the grain b containing the grains is dropped and the motor 6 is energized to rotate the axial turbo fan 8, the eccentric cam 12, and the auxiliary windmill 29, the axial turbo fan 8 sucks grains from the suction port 47 on the side. The wind passes through the wind turbine case 7 and blows up from the opening 9, and blows up from the blowhole 16 on the bottom surface 15 of the sorting frame 10 as shown in FIG. Further, when the arm 33 is moved upward, the wind from the auxiliary windmill 29 blows up through the upper opening 30 through the outlet 34 and up through the adjustment plate 20.

The grains b falling from the supply hopper 18 fall onto the bottom surface 15, but since wind is blowing up from each blowhole 16 on the bottom surface 15, the grains b float to a certain height 19. The balance is balanced, but the lower surface of the floating grain group B at that time is like a limestone cave-like ceiling in Fig. 1, which is created when using the axial flow plate fan G as shown in Fig. 4, or a cross-section as shown in Fig. 5. Unlike the lower surface E of a low floating grain layer as shown in FIG. 2 which is created when the flow sirocco fan H is used, the axial flow type turbo fan 8 results in a high flat ceiling as shown in FIG. 3. In this state, the leading grain b remains balanced and does not move forward or backward.

Subsequently, when the succeeding grain b is supplied from the supply hopper 18, the succeeding grain b pushes the preceding grain b to the front and rear sides, and the leading grain b pushed to the rear side passes through the grain outlet 37.
more excreted. The preceding grain b that has been pushed forward moves onto the adjustment plate 20, but on the adjustment plate 20, the wind from the auxiliary windmill 29 is blowing up a little strongly, so it is blown back by the action of the cover 22.

[0019] Therefore, the stone debris a contained in the grain b is
Since the specific gravity is heavy, after falling from the supply hopper 18 as shown in FIG. Since the bottom surface 15 vibrates violently with an amplitude of 2 to 3 mm via the eccentric cam 12 and the rod 13, the stone chips a that hit the protrusion 17 move into the space 4 between the bottom surface 15 and the lower surface 46 of the floating grain.
5 without hitting the lower surface 46 of the floating grain, as shown by the arrow (b) in Figure 3.
As shown in the figure, the stone chips reach the adjustment plate 20 and are taken out from the stone waste outlet 24. Incidentally, when the bottom surface 15 is made to vibrate by as much as 10 mm, the stone chips a that hit the protrusion 17 move forward as shown by the arrow (a) in FIG. 3, hit the lower surface 46 of the floating grain, and do not advance.

[0020]

[Effect] The disadvantage of the stone debris removal device using the axial plate fan G shown in Fig. 4 is that the wind is not uniform, so the lower surface E of the floating grain layer becomes like the ceiling of a limestone cave as shown in Fig. 1. When the bottom surface C is tilted and vibrated in the front-back direction and the heavy stone chips a that have fallen onto the bottom surface C are thrown away, the stone chips a
As shown by arrow (A), the ball collides with the lower surface E, which hangs down low, and is disturbed, resulting in a short flight distance and no improvement in efficiency. The disadvantage of the stone debris removal device using the cross-flow sirocco fan H shown in Figure 5 is that because the wind is weak, the lower surface E of the floating grain layer becomes flat as shown in Figure 2, but it is low, and the bottom surface C is When stone chips a with a heavy specific gravity that have fallen onto the bottom surface C by tilting vibration are thrown away with the protrusion B, the stone chips a collide with the low lower surface E portion as shown by the arrow (b), and the flying distance is short. This is the point where efficiency cannot be improved. However, the present invention provides a sorting frame 1 having a bottom surface 15 with numerous blowholes 16 and protrusions 17, a grain outlet 37 at the rear end, and a stone waste outlet 24 at the front end.
Air is blown from the lower surface side of the bottom surface 15 to float the grains b supplied to the upper surface side of the bottom surface 15 to a certain height 19 by the wind blowing up from the blowhole 16. A space 45 is formed in between, and the bottom surface 15 is tilted and vibrated in the front-back direction, and the heavy stone debris a that has fallen onto the bottom surface 15 is thrown away by the protrusion 17 to form the space 4.
In the device for removing stone debris that moves within the grain 5 and is taken out from the stone debris outlet 24, the blower device provided on the bottom side of the sorting frame 10 is an axial flow type turbo fan 8. Therefore, as shown in FIG. 3, good selection is possible.

[Brief explanation of drawings]

FIG. 1 is an operational diagram of a known example.

FIG. 2 is an operational diagram of a known example.

FIG. 3 is a working state diagram of the present invention.

FIG. 4 is a cross-sectional view of a known example.

FIG. 5 is a cross-sectional view of a known example.

FIG. 6 is a cross-sectional view of the present invention.

FIG. 7 is a vertical cross-sectional view of the present invention.

FIG. 8 is a working state diagram of the present invention.

FIG. 9 is a perspective view of the present invention.

[Explanation of symbols]

1...Case, 2...Lower case, 3...Upper case, 4...Trash can, 5...Guide plate, 6...Motor, 7...Windmill case, 8...
Windmill, 9... Opening, 10... Sorting frame, 11... Inclined support rod, 1
2... Eccentric cam, 13... Rod, 14... Side wall, 15... Bottom surface, 16... Blow hole, 17... Protrusion, 18... Supply hopper, 19
...constant height, 20...adjustment plate, 21...side wall, 22...cover,
23...Bending wall, 24...Drop opening, 25...Axis mounting portion, 26...Screw tube, 27...Adjustment screw, 28...Sub-wind turbine case, 29...Sub-wind turbine, 30...Upper opening, 31...Switching valve, 32... axis, 33
...Arm, 34...Air outlet, 35...Stone falling part, 36...Return pipe, 37...Grain take-out port, 38...Upper switch, 39...Center switch, 40...Lower switch, 41...Motor, 42...
Drive gear, 43...pinion, 44...stone waste storage box, 45...
Space, 46... lower surface of floating grain, 47... suction port, a... stone chips, b... grain.

Claims (1)

[Claims] Claim 1: Numerous blowholes 16 and protrusions 17, a grain outlet 37 at the rear end, and a stone waste outlet 24 at the front end.
Air is blown from the lower surface side of the sorting frame 10 having a bottom surface 15 formed with the grains B, and the grains b supplied to the upper surface side of the bottom surface 15 are floated to a certain height 19 by the wind blowing up from the blowhole 16. A space 45 is formed between the bottom surface 15 and the lower surface 46 of the floating grain layer, and the bottom surface 15 is tilted and vibrated in the front-back direction, so that the heavy stone debris a that has fallen to the top of the bottom surface 15 is thrown away by the projections 17. In the stone waste removing device, which moves within the space 45 and takes out the stone waste from the stone waste outlet 24, the blowing device provided on the lower surface side of the sorting frame 10 is an axial flow type turbo fan 8, which removes stone waste from grains. Device.