JPH0137732Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a sand sorter that roughly separates stones and soil in earth and sand according to their sizes.

(Prior art) Generally, in order to restore rice fields contaminated with cadmium, etc., the contaminated topsoil is removed, stones are sorted out from the contaminated topsoil, the contaminated soil is buried in the bottom layer, and the top layer is buried. An example of restoration work involves laying stones and filling the surface with clay soil excavated from the mountain.

In order to sort stones from a large amount of contaminated topsoil during restoration work for such contaminated fields, a highly efficient mobile soil sorter is required.

Now, as shown in Japanese Unexamined Patent Publication No. 52-130057, a stationary earth charcoal processing plant in which a drum support is fixedly installed on the ground surface via a support device, and a rotating drum is provided on this support. There is.

The rotary drum of this earth charcoal treatment plant uses a multi-stage earth charcoal treatment device to remove the soil contained in the gravel, and finally uses a trommel to remove two types of gravel using two types of mesh wire. It is sorted into different sizes.

(The problem that the invention attempts to solve) As described above, the conventional trommel made only of metal rope does not have much effect on breaking up clayey soil clods. In front of this trommel, a multi-stage charcoal processing device is installed to separate stones and soil, but the rotating drum consisting of the multi-stage charcoal processing device and trommel has a very large overall length. So,
This cannot be used as a self-propelled sorter in large-scale fields.

The purpose of the present invention is to provide a mobile soil sorter that can efficiently separate large-diameter stones and soil from soil over a wide range of areas such as large fields.

[Structure of the idea]

(Means for solving the problem) The present invention provides a base machine 1 having an endless track 2.
An inclined support stand 9 is provided on the upper part of the inclined support stand 9.
A trommel 11 for soil and sand sorting, which is cylindrical and whose outer periphery is shaped like a grid, is supported in an inclined manner and rotatably, and the earth and sand input section 25 is connected to the opening in the end face on the rising side of the trommel 11. A large-diameter object removal portion 27 is provided at the end opening on the descending side of the trommel 11.
A small-diameter object take-out part 32 is pulled out from the lower side of the trommel 11 to the outside, and a large-diameter sprocket 22 is integrally formed on the outer peripheral surface of the opening on the rising side of the trommel 11. A small-diameter sprocket rotated by a hydraulic motor 23 connected to the hydraulic power source of the base machine 1 is installed on the side of the base machine 1, and an endless chain 24 is wound around the small-diameter sprocket and the large-diameter sprocket 22. 11 is a large number of annular plates 15 arranged in parallel, and each annular plate 15
A large number of rods 16 inserted through the plate form a lattice shape, and each annular plate 15 and each rod 16 form a rectangular hole 17 for soil sorting.
The flesh peripheral edge 18 of each annular plate 15 is made to protrude from the rod 16 toward the flesh side.

(Function) In the present invention, the earth and sand put into the earth and sand input part 25 by a power shovel etc. are put into the trommel 11 which is rotationally driven by the hydraulic motor 23 via the endless chain 24 etc. The large-diameter objects (large stones) and small-diameter objects (soil, sand, pebbles) in the earth and sand are roughly separated, and the large-diameter objects are passed through the trommel 11 and transferred to the large-diameter object extraction section 2.
7 to the outside, and for small diameter items, use the trommel 11.
The small-diameter material is taken out from the small-diameter removal section 32 through the lattices.

In the above-mentioned separation classification, clayey soil lumps that are difficult to crumble are either struck from the earth and sand input section 25 against the inner peripheral edge 18 of the annular plate 15 and decomposed by the impact;
Or, each annular plate 15 receives the locking action of the inner circumferential edge 18 protruding inward from the rod 16, and moves gently from the rising side to the falling side.
During that time, the earth clod is collided with the rotating rod 16 many times, and the impact gradually breaks it down.
Stones and soil are effectively separated.

(Example) Hereinafter, the present invention will be described in detail with reference to an example shown in the drawings.

As shown in FIG. 1, a base machine (traveling device) 1 of a hydraulic excavator (power shovel) has a hydraulically driven endless track 2.
A base frame 3 is provided on this base machine 1, and a power device 4 such as an engine and a hydraulic power source for driving the base machine 1 is installed on one side of the base frame 3, and an operation panel 5 is installed on the other side. and an operating lever 6 etc. are provided. Further, a support frame 7 is erected around the power unit 4, and an intermediate portion of an inclined support table 9 is supported on the left and right upper portions of the support frame 7 via a pivot shaft 8 so as to be able to adjust the inclination angle. As shown in FIG.
A hydraulic cylinder 10 has a cylinder body rotatably supported on a base frame 3 at one end thereof.
The tip of the piston rod is rotatably connected to the shaft.
Then, this hydraulic cylinder 10 is telescopically operated by the hydraulic power source for driving the base machine 1, and the tilt angle of the tilt support table 9 is adjusted within the range of 7° to 11° with the pivot shaft 8 as the fulcrum. adjust.

Further, this inclined support table 9 supports a cylindrical trommel 11 having both ends open in an inclined manner and rotatably. As shown in FIG. 4, this trommel 11 has a cylindrical part 12 on the ascending side and a cylindrical part 13 on the descending side integrated by a plurality of plate members 14, and a space between the cylindrical parts 12 and 13 at both ends. It is formed in a lattice shape by a large number of annular plates 15 arranged in parallel and a large number of rods 16 inserted through each annular plate 15 at predetermined intervals as shown in FIG. Each annular plate 15 and each rod 16 form a large number of square holes 17 for soil sorting. Each of the above annular plates 1
Numeral 5 is a receiving member which functions as a rib and whose inner peripheral edge 18 protrudes inward from the rod 16 as shown in FIG. It also functions as a member to prevent soil clods from falling quickly inside the container.

Therefore, the hard-to-collapse clayey soil lumps in the earth and sand thrown into the trommel 11 are either disintegrated by the instant impact when they are struck from the earth and sand input part 25 against the inner circumferential edge 18 of the annular plate 15, or Each annular plate 15 gradually moves from the ascending side to the descending side while being caught on the inner circumferential edge 18 protruding inward from the rod 16, and during that time it collides with the rotating rod 16 many times. Clayey soil clods that are not decomposed when being fed into the trommel are also gradually decomposed, and large stones and non-large stones in the soil clods are effectively separated.

Further, as shown in FIGS. 3 and 4, the support structure of this trommel 11 is similar to the support structure of a rotating drum of a concrete mixer, with the outer peripheral surfaces of the cylindrical portions 12 and 13 at both ends of the trommel 11 being inclined. The trommel 11 is supported by a pair of rollers 19 on the support stand 9, and the descending side surface of a flange-like member 20 protruding from the outer peripheral surface of the descending-side cylindrical portion 13 is locked by a roller (not shown). In order to prevent the trommel 11 from shifting to the downward direction, anti-floating bands 21 are wrapped around the outer peripheral surfaces of the cylindrical parts 12 and 13 at both ends of the trommel 11, as shown in FIGS. 2 and 3. Furthermore, the cylindrical portion 1 on the rising side of this trommel 11
A large diameter sprocket 22 is integrally formed on the outer peripheral surface of the hydraulic motor 23, and as shown in FIG. , an endless chain 24 is connected to the small diameter sprocket of this hydraulic motor 23 and the large diameter sprocket 22 of the trommel 11.
The hydraulic motor 23 is driven by the hydraulic power source of the base machine 1, and the trommel 11 is rotationally driven via the endless chain 24.

Further, a hopper 25 serving as an earth and sand charging section is connected to an opening in the end face on the rising side of the trommel 11. The hopper 25 is fixedly installed on the inclined support stand 9 via a support frame 26, and has an input port provided on its upper surface. In addition, a chute 27 is provided at the end opening on the descending side of the trommel 11 as a part for taking out large-diameter objects.
The upper frame 28 of the chute 27 is exposed, and the lower part of the chute 27 is pulled out to the outside of the endless track 2 on one side. This chute 27 is fixedly installed on the base frame 3 by a support member 29.

Further, as shown in FIGS. 3 and 4, a stone collection guide 30 is provided extending from the left and right side surfaces to the bottom surface of the lattice-shaped portion of the trommel 11, and this stone collection guide 3
Another stone collecting guide 31 is made to face the center opening of the lower surface of the stone collecting guide 31. The upper stone collection guide 30 is fixedly installed on an inclined support stand 9 and can move up and down together with this support stand 9, but the lower stone collection guide 31 is fixed on the base frame 3 by a support frame (not shown). A belt conveyor 32 serving as a small-diameter object takeout section is pulled out in an upwardly inclined manner from the lower side of the lower stone collection guide 31 to the outside on the opposite side from the chute 27. As shown in FIG. 4, the stone collecting guide 31 is open on the discharge side by the belt conveyor 32, and has a contact portion 33 with the belt conveyor 32 made of rubber, synthetic resin, etc. The belt conveyor 3 is placed in close contact with the conveyor 32.
This prevents the earth and sand from falling onto the opposite side (left side in Figure 3).

The belt conveyor 32 supports the endless belt 36 by a large number of inclined rollers 35 installed along a frame 34 so that the upper surface of the endless belt 36 is concave, and the belt wheel at the lower end shown in FIG. 37 is rotated by a hydraulic motor 38 fixed on the base frame 3 via a chain and a sprocket, as shown in FIG. 1, thereby driving the endless belt 36 to rotate. This belt conveyor 32 has a descending side at a gentle angle of about 5 degrees, and a rising side at a relatively steep angle of about 15 degrees.
The tip of this belt conveyor 32 is set at a sufficient height from the ground, so that a large amount of earth and sand can be piled up under the tip of this conveyor 32. This improves workability. The hydraulic motor 38 is driven by the hydraulic power source of the base machine 1.

Next, the operation of this embodiment will be explained. The trommel 11 is rotated by the hydraulic motor 23, and the belt conveyor 32 is rotated by the hydraulic motor 38.
While driving, earth and sand excavated by a hydraulic excavator (power shovel, backhoe) is thrown into the hopper 25.

This soil is from hopper 25 to trommel 11.
and is sorted by size through the square hole 17. The clayey soil lump that is hard to crumble in the earth and sand is transported from the earth and sand input part 25 to the inner peripheral edge 1 of the annular plate 15.
Will it disintegrate due to the momentary impact of being hit by 8?
Otherwise each rod 1 inside the trommel 11
It is gradually disintegrated by continuous impact from the side from 6, and only the large stones fall down inside the trommel 11 under their own weight. At this time, the clayey soil mass slowly moves downward while being caught on the inner peripheral edge 18 of each annular plate 15, and during this time it collides with the rod 16 many times, and the impact causes the clay to collapse. It decomposes, and the stones that are held together by the clay are separated. In this way, large clods of soil do not momentarily pass through the trommel 11, but accumulate within the trommel 11, and are reliably sorted according to the size of the square hole 17.

The stone with a larger diameter than the square hole 17 above is trommel 11.
Stones and soil that are smaller in diameter than the square hole 17 are taken out from the chute 27 through the hole 17, pass through the stone collection guides 30 and 31, and fall onto the belt conveyor 32.
2, it is ejected to the opposite side from the stone of the Great Sutra,
They are piled up under the tip of the conveyor 32.

Furthermore, by changing the trommel 11 to one with a smaller square hole, it is possible to separate soil from small-diameter stones in the earth and sand. This trommel 11 can be easily replaced by removing the floating prevention band 21.
Further, the inclination angle of the inclined support table 9 is adjusted to an optimum angle depending on the quality of the soil to be sorted. This adjustment can be made extremely easily using the hydraulic cylinder 10.

Although the hopper 25 is shown as an example of the earth and sand input section, this may be replaced by a belt conveyor, etc.Although the chute 27 is shown as an example of the large diameter object takeout section, this may also be a belt conveyor, etc. Although the belt conveyor 32 is illustrated as a part, this may also be a chute.

[Effect of idea]

According to the present invention, since the trommel for soil sorting, which has a cylindrical outer periphery formed in a grid pattern, is configured to be rotationally driven on a base machine having an endless track, it can be used even in fields with soft ground. In addition to being able to run on its own, the trommel with a sturdy lattice structure can roughly separate stones from soil, making it possible to move over a wide area in large fields, etc., and efficiently carry out soil sorting work. . Therefore, the soil sorter of the present invention can demonstrate its effectiveness in large-scale restoration work of cadmium-contaminated fields, etc.

In addition, the trommel of the present invention is formed in a lattice shape by a large number of circular plates arranged in parallel and a large number of rods inserted through each circular plate, and the inner peripheral edge of each circular plate is placed inside the rods. Since the clayey soil lumps that are difficult to crumble are pushed out from the earth and sand input section against the inner periphery of this annular plate and broken down, or else they are caught on the inner periphery of each annular plate and are moved to the rising side of the trommel. As it slowly moves downwards, it collides with the rotating rod of the trommel many times and gradually disintegrates due to the impact, making it possible to effectively distinguish between stone and soil.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the soil separator of the present invention as seen from one side, Fig. 2 is a perspective view as seen from the other side, Fig. 3 is its side view, and Fig. 4 is its front view. Figure 5 is a sectional view of the trommel. 1... Base machine, 2... Endless track, 9...
Inclined support base, 11... Trommel, 15... Annular plate, 16... Rod, 17... Square hole, 18...
Inner peripheral edge, 22... Large diameter sprocket, 23... Hydraulic motor, 24... Endless chain, 25...
A hopper as an earth and sand input section, 27...a chute as a large-diameter object take-out section, 32... a belt conveyor as a small-diameter object take-out section.

Claims (1)

[Claims for Utility Model Registration] (1) An inclined support is provided on the upper part of a base machine having an endless track, and the inclined support allows a trommel for soil sorting which is cylindrical and whose outer periphery is formed into a grid pattern to be mounted. Supported in an inclined manner and rotatably,
An earth and sand input part is connected to the end opening on the rising side of the trommel, a large-diameter object take-out part faces the end-face opening on the descending side of the trommel, a small-diameter object take-out part is pulled out from the bottom of the trommel, and the A large-diameter sprocket is integrally formed on the outer circumferential surface of the opening on the rising side of the trommel, and a small-diameter sprocket is attached to the side of the large-diameter sprocket and rotated by a hydraulic motor connected to the hydraulic power source of the base machine. An endless chain is wound around the small-diameter sprocket and the large-diameter sprocket, and the trommel is formed in a lattice shape with a large number of circular plates arranged in parallel and a large number of rods inserted through each circular plate. A soil sorting machine characterized in that each of the annular plates and each rod forms a square hole for soil sorting, and the inner peripheral edge of each annular plate projects inward from the rod. (2) The earth and sand sorter according to claim 1, wherein the tilt angle of the tilt support base can be adjusted using a pivot shaft as a fulcrum. (3) The earth and sand sorter according to claim 1, wherein the small-diameter object take-out section is an upwardly inclined belt conveyor driven by a hydraulic motor connected to a hydraulic power source of a base machine.