KR102159648B1 - Soil screening apparatus and method of aggregate that prevent clogging of select hole - Google Patents

Abstract

The present invention relates to a dual soil sorting device and method which prevent clogging of a sorting hole. The device comprises: a first trammel (10) which has both lengthwise direction sides opened therein to discharge soil injected from one side to the other side, and has continuous sorting holes (11) for sorting foreign materials along the lengthwise direction; a second trammel (20); and a scrapper. According to the present invention, sorting holes are alternately and repeatedly disposed along the lengthwise direction, and thus soil can be sorted (foreign materials can be removed) without clogging.

Description

A device and method for sorting double soil dust that eliminates clogging of the sorting hole {SOIL SCREENING APPARATUS AND METHOD OF AGGREGATE THAT PREVENT CLOGGING OF SELECT HOLE}

The present invention relates to a sediment sorting device, and more particularly, to eliminate the clogging of the separating hole for separating the sediment without clogging through a continuous separating hole along the circumferential direction, and two-stage sorting by a double trommel. It relates to an apparatus and method for separating double soil powder for improving the separating efficiency.

This part provides background information related to the content of the present application, and is not necessarily prior art.

Construction and civil works are dismantled due to deterioration and remarkable deterioration in function, redevelopment, reconstruction, etc., and thus the dismantled waste is increasing rapidly.The construction waste is the dismantling work of structures such as construction and civil works. The disposal is complicated because various kinds of wastes are discharged as soil, sand, gravel, earth and sand in the form of mixed garbage, waste materials, etc., and concrete blocks, waste wood, asphalt concrete blocks, etc. It is difficult.

In addition, by making practical recycling possible through appropriate management of such wastes, it is necessary to actively pursue minimization of environmental pollution, replacement of scarce resources, and cost reduction throughout the construction industry. Various methods are emerging, but in general, the waste treatment method is to regenerate useful materials from waste through shredding, sorting, and washing. In spite of such purposes, when using such a system, the components are Due to improper placement, it was difficult to precisely sort automated aggregates, and it caused frequent equipment damage by significantly weakening the durability of screens and conveyors, and the contamination during the washing process was severe, resulting in a lot of problems in reuse of water. I did.

The patent document (Registration Utility Model No. 20-0383357) describes a plurality of vibration screens arranged up and down while inclined at various angles so that construction waste is sorted by particle size by vibration, and air is supplied to the plurality of vibration screens. An air supply pipe to be supplied, an air injection pipe branched from the air supply pipe to supply air to the lower part of each vibration screen and formed horizontally, and the air is injected in an inclined direction so that wind power of construction waste can be selected. It includes a plurality of air injection holes formed through the injection pipe, and because the vibration screens are installed at a large height difference and wind is applied only under the vibration screen, it is only good for foreign substances falling from the vibration screen.

Registered Patent No. 10-1762706 describes the longitudinal direction of the screen frame by a spring unit so that the screen board divided in an arc shape on the screen frame constituting a cylindrical skeleton has a constant clearance in the circumferential and longitudinal direction. In the trommel sorting device, which is supported by a member and has a structure in which each screen board flows independently and constitutes a cylindrical screen of a cylindrical shape as a whole, the support part that is coupled to the longitudinal member of the screen frame and protrudes to the back surface thereof. A support structure consisting of a post formed and the end of the post is formed with a shaft hole penetrating in the longitudinal direction, a shaft inserted into the post shaft hole of the support, and a folding structure around the axis by being engaged by the shaft hole and the shaft inserted therein A liner assembly consisting of a rectangular plate-shaped flow blade coupled with a column, and a tension spring coupled to the inner side of both flow blades through the post, and the flow blade of the liner assembly through a gap formed between the screen boards. As a structure in which the support base is coupled to the longitudinal member of the screen frame so that the end of the screen frame protrudes inwardly in contact with the inner wall of the screen board, there is a serious problem in that the screen hole is perforated to block the net.

In addition, Patent No. 10-2062614 discloses that a plurality of sorting rods are arranged along the longitudinal direction to form holes, which is very complicated to manufacture and the sorting efficiency is inferior due to the direction of the sorting rod.

In addition, according to the conventional Trommel, there have been attempts to eliminate the clogging of the sorting hole, and there are methods of spraying air and installing brushes. There is a problem, and the brush type only scratches the outer surface of the trommel, so it cannot solve the clogging inside the trommel.

Registered Utility Model No. 20-0383357 Registered Patent No. 10-1762706

The present invention is to solve the above-described problem, the sorting holes are continuously arranged along the circumferential direction, that is, while opening all the spaces of the sorting holes, the sorting holes are alternately arranged along the length direction to sort soil without clogging ( It is possible to remove foreign substances), and to provide a soil sorting device and method that eliminates clogging of the sorting hole so that the sorting hole is not blocked by earthen dust inside the trommel, and produces high-quality earthen dust through two or more screening steps. There is a purpose.

In the double-soil sorting device that eliminates clogging of the sorting hole according to the present invention, both sides in the longitudinal direction are opened inside to discharge the dirt input from one side to the other side, while the sorting hole for sorting foreign substances is continuous along the length direction. The primary trommel that becomes; It is installed on the outside of the primary trommel in a tubular structure having a diameter larger than that of the primary trommel, and separates soil and foreign substances that have passed through the selection hole of the primary trommel through a continuous selection hole along the length direction. Secondary trommel; It is fixedly installed on the outer periphery of the primary and secondary trommels, and includes a scraper for separating soil in the sorting hole from the trommel, and the primary and secondary trommels are respectively along a length direction. Including a plurality of rings arranged at a certain interval between each other to form a sorting hole, and a connecting rod that is arranged in a direction crossing the rings and fixed to the rings through a leg, the sorting hole is continuous without disconnection along the circumferential direction. It is formed in a circular shape, and the scraper is formed to protrude at a predetermined interval from each other along the sorting hole and inserted into the sorting hole between the rings, thereby including a scraper protrusion that removes soil blocking the sorting hole, wherein the connecting rod Is spaced apart from the inside of the ring through the leg and includes one or more through portions without interfering with the scraper protrusion.

According to the dual earth dust sorting apparatus and method for eliminating clogging of the sorting hole according to the present invention, the sorting hole is arranged along the circumferential direction, and all sections are kept open without leaving a part where soil powder and foreign matter accumulate. Since it is possible to sort soil powder without clogging, it has the effect of improving the sorting efficiency. In addition, it prevents soil powder from accumulating from the inside of the trommel by allowing the scraper to pass through the inside of the trommel through the ring and connecting rod forming the sorting hole. There is also an effect of effectively resolving clogging of the ball. In addition, there is an effect of increasing the screening efficiency of foreign matters through two-stage sorting by primary and secondary trommels, and eventually producing high-quality soil.

1 is a perspective view of a double earth dust sorting apparatus for eliminating clogging of a sorting hole according to the present invention.
Fig. 2 is a front view of a double soil powder sorting device for eliminating clogging of a sorting hole according to the present invention.
Fig. 3 is a plan view of a double soil powder sorting device for eliminating clogging of a sorting hole according to the present invention.
Figure 4 is a side view of a double soil sorting device for eliminating clogging of the sorting hole according to the present invention.
Figure 5 is a view showing a through hole of a connecting rod applied to the double soil sorting device to eliminate clogging of the sorting hole according to the present invention.
6 and 7 are a side view and a perspective view showing another example of a scraper applied to a double soil sorting device for solving clogging of a sorting hole according to the present invention, respectively.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

As shown in Figs. 1 to 4, the double earth dust sorting apparatus 100 for solving the clogging of the sorting hole according to the present invention has a cylindrical structure in which both sides in the longitudinal direction are open, and a plurality of sorting holes 11 and 21 ) Is provided, and a double trommel (10, 20), primary and secondary trommel by primary and secondary to sort soil by removing foreign substances through the sorting holes (11, 21) while rotating through the rotating means It is fixedly installed on the periphery of the Rommel (10, 20) and consists of primary and secondary scrapers (30, 40) that remove foreign substances blocking the sorting holes (11, 21), and each configuration will be described in detail below. Same as

The primary and secondary trommels 10 and 20 have the same configuration and have different diameters, so that the primary trommel 10 is inserted into the secondary trommel 20, and the primary trommel 10 And the secondary trommel 20 have a difference in diameter for smooth selection of the secondary soil and foreign matters that have passed through the selection hole 11 of the primary trommel 10.

The primary trommel (10) and the secondary trommel (20) are composed of a plurality of rings (12, 22) and connecting rods (13, 23) as components, respectively, to form a selection hole (11, 21), The balls 11 and 21 are alternately arranged with the rings 12 and 22 to form a plurality of the first and second trommels 10 and 20 along the longitudinal direction.

When the sorting holes 11 and 21 have different sizes, the sorting hole 11 of the primary trommel 10 is larger than the sorting hole 21 of the secondary trommel 20, and thus, relatively large The grain sized soil powder is selected in the first trommel 10, and the relatively small grain size soil material is selected in the second trommel 20.

In addition, the sorting holes 11 and 21 may be of the same size, and the size is the same, so that only soil powder of the same particle size is selected, but foreign matter can be more effectively removed through the second operation. In this case, it is also possible for the selection holes 11 and 21 to be on the same line, and positions where they are alternated with each other are possible.

The rings 12 and 22 may have various cross-sections such as a square cross section and a circular cross section.

The connecting rods 13 and 23 are arranged in a direction orthogonal to the plurality of rings 12 and 22, that is, in a direction transverse to the rings 12 and 22, and are fixed to the rings 12 and 22.

The connecting rods 13 and 23 are inside the primary and secondary trommels 10 and 20 so that the primary and secondary scrapers 30 and 40 are close to the primary and secondary trommels 10 and 20. A circular rod is preferable as a rod having a curved outer circumferential surface so that soil powder flowing into the first and second trommels 10 and 20 does not accumulate, and of course, it is not limited to a rod, and a flat iron is also possible.

The connecting rods 13 and 23 pass through the sorting holes 11 and 21 of the primary and secondary trommels 10 and 20, while removing the blockage of the sorting holes 11 and 21 with the primary and secondary scrapers ( It must be spaced from the inner surface of the rings 12 and 22 so as not to restrict the motion of the 30 and 40, and for this purpose, it is fixed to the rings 12 and 24 through the legs 14 and 24.

The connecting rods 13 and 23 may be formed on one or more of the inside and outside of the primary and secondary trommels 10 and 20.

The legs 14 and 24 rotate when the primary and secondary trommels 10 and 20 rotate and pass through the scraper protrusions 32 and 42 of the primary and secondary scrapers 30 and 40, which are fixed. The connecting rod (32, 42) penetrates the sorting holes (11, 21) between the rings (12, 22) so that the soil accumulated inside the sorting holes (11, 21) is also removed from the rings (12, 22). 13,23) are separated from the rings 12,22.

The legs (14, 24) should be connected to the rings (12, 22) and the connecting rods (13, 23) on both sides, respectively, and in that way, it is a single unit (square or circular side) and one side is the ring (12, 22). The method is welded to and the other side is welded to the connecting rods (13, 23), formed integrally with the rings (12, 22) or the connecting rods (13, 23) (comb pattern) and the free end is the connecting rods (13, 23) ) Or to the ring (12, 22).

According to this configuration, the connecting rods 13 and 23 also function to maintain a constant spacing between the rings 12 and 22.

Only one of the connecting rods 13 and 23 may be used for fixing the rings 12 and 22, or two or more may be spaced apart from each other at a predetermined distance along the circumferential direction.

As shown in Fig. 5, the connecting rods 13 and 23 allow the scraper protrusions 32 and 42 to be disposed more inward than the inner surfaces of the rings 12 and 22, and the inner surface of the ring 12 through the legs 14. Although it is spaced apart from the ring (12, 22) because it is arranged in a transverse direction, soil powder can be accumulated, and in order to more effectively eliminate the soil powder accumulation there, one or more through holes 13a, 23a) may be included.

The through-holes 13a and 23a may function as a welding hole when fixing the legs 14 and 24 by welding while having a function of preventing soil powder from passing through.

Preferably, the through holes 13a and 23a are formed on the sorting holes 11 and 21 or on the legs 14 and 24, and the quantity and shape (circular, elliptical, etc.) can be variously implemented.

In addition, the through-holes 13a and 23a are not limited to a shape that penetrates only up and down, and a shape of a groove formed at the edges of the connecting rods 13 and 23 to communicate with the circumferential portion is also included.

That is, both through holes and through holes are through portions.

The primary and secondary trommels (10, 20) are not limited to using rings (12, 22) completed in a circular shape, and a plurality of straight rods are fixed with connecting rods (13, 23) to secure a comb-shaped plate. It may be manufactured and manufactured by a method of fixing both ends facing each other after rolling the plate in a circular shape, and fixing of both ends is also possible by connection rods 13 and 23.

In addition, one or two or more of the primary and secondary trommels 10 and 20 are connected and used, and two or more connections are made by the aforementioned connecting rods 13 and 23.

The primary and secondary trommels 10 are single units and can be either a single type or an integral type connected to each other, each rotatably supported on the frame 1 via a bearing or the like. The drawing shows a state in which the primary and secondary trommels 10 and 20 are supported on the frame 1 through bearings 2 and 3, respectively, and in the case of a single type, various sorting through different speed control There is an advantage to create conditions.

Frame 1, for example, by assembling a beam (H-beam, I-beam, etc.), a plate, and an angle, so that the discharge end of the secondary trommel 20 on the outside does not contact the ground, and a conveyor, etc. It is configured to secure space for installation. In addition, the frame 1 may include a cover covering the circumferences of the primary and secondary trommels 10 and 20 to prevent scattering and loss of soil and foreign matter.

The primary trommel 10 disposed inside is formed longer than the secondary trommel 20 outside, so that both sides in the longitudinal direction protrude to the outside of the secondary trommel 20, and this part is the bearing 2 ) Through the frame (1).

The primary and secondary trommels (10, 20) are rotatably supported on the frame and rotated through a rotating means to enable sorting using all parts of the sorting holes (11, 21), and the rotating means is, for example, It consists of a motor fixed to the frame, a power transmission means for transmitting the rotational force of the motor to the primary and secondary trommel (10, 20), the power transmission means is a drive sprocket coupled to the drive shaft of the motor and the primary It may be a sprocket connected to a driven sprocket coupled to the circumference of the and secondary trommels 10 and 20.

The primary and secondary trommels (10, 20) can be rotated through a single motor, and even so, when the primary and secondary trommels (10, 20) are single-type, each speed is controlled to be the same or different. do.

Of course, it is also possible to include two motors so that the primary and secondary trommels 10 and 20 are driven through respective motors.

In the present invention, since the spacing between the rings 12 and 22 is the sorting holes 11 and 21, the size of the sorting holes 11 and 21 can be freely adjusted by adjusting the spacing of the rings 12 and 22, and thus, 1 Selection holes 11 and 21 of various sizes can be configured in the primary and secondary trommels 10 and 20, for example, the discharging end of the opposite side from the input end (right end of the drawing), which is one end in the longitudinal direction It is very easy to increase the size of the sorting holes 11 and 21 while going to, and to form sorting sections of different sizes.

The primary trommel 10 may include an entry guide unit 15 and an exit guide unit 16 on both sides in the longitudinal direction.

The entry induction portion 15 and the entry induction portion 16 are each cylindrical without holes and are fixed to the entry portion and exit portion of the primary trommel 10 by welding or the like.

The entry induction part 15 is a part into which aggregates (a mixture of soil and foreign substances) supplied through a hopper, screen, or fork lane are input, and supplies all aggregates supplied to the sorting hole 11 after a certain period of time due to no holes. .

The advance induction part 16 is a part for discharging soil from which foreign matters are selected in the first trommel 10, and induces rapid discharge of the soil from which foreign matters are selected.

The secondary trommel 20 may also include an entry guidance unit 25 and an exit guidance unit 26.

The primary and secondary scrapers 30 and 40 are formed protruding from the fixing portions 31 and 41 and the fixing portions 31 and 41 along the selection holes 11 and 21 at a predetermined interval from each other, and the selection holes 11 It includes a plurality of scraper protrusions 32 and 42 inserted into the selection hole 11 and 21 to eliminate clogging.

The primary and secondary scrapers (30, 40) are not in the lower part and are advantageous for resolving clogging in consideration of the separation of soil and foreign substances as they fall to the lower part. do.

The primary and secondary scrapers 30 and 40 have different fixing parts 31 and 41 according to the dual structure of the primary and secondary trommels 10 and 20.

The primary fixing portion 31 includes two vertical bars each erected on both sides of the primary trommel 10 in the longitudinal direction, and the primary scraper protrusion 32 is formed along the selection holes 11 on the plate. It is formed so as to be arranged and both sides of the plate material in the longitudinal direction are fixed to the vertical bars.

The primary scraper protrusion 32 is installed between the primary and secondary trommels 10 and 20 in the form of being inserted into the inside of the selection hole 11 of the primary trommel 10.

The secondary fixing part 41 is a plate material and is fixed to the frame 1 while being arranged long along the longitudinal direction of the secondary trommel 20 outside of the secondary trommel 10, and the fixing is detachable. Fixing by bolts and nuts is preferable.

The fixing part 41 may be a flat plate, or a curved plate that is the same or similar to the outer shape of the secondary trommel 20, that is, the shape of the ring 22.

The scraper protrusion 42 protrudes on one side of the fixing part 41, that is, the side facing the secondary trommel 20, and its length is inserted into the selection hole 21 of the secondary trommel 20, so that the free end It is a length that is spaced apart from the inner surface of the ring 22 and penetrates into the secondary trommel 20.

The scraper protrusion 42 may be of various shapes such as a plate shape and a rod shape, and is preferably used in the same quantity as the selection hole 21 along the direction of the selection holes 21, that is, the lengthwise direction of the fixing part 41.

In both the primary and secondary, the scraper protrusions 32 and 42 may be in one or two or more rows.

The primary and secondary scrapers 30 and 40 may be integrated.

That is, as shown in FIGS. 6 and 7, the single-type scraper 50 has a fixing part 51 fixed to the frame 1, and a selection hole 21 of the secondary trommel 20 in the fixing part 51 After passing through, it is composed of a plurality of scraper rods 52 inserted into the selection hole 11 of the inner primary trommel 10.

The scraper rod 52 is composed of a straight rod by matching the positions of the selection holes 11 and 21 when the size of the selection holes 11 and 21 is the same, but when the sizes of the selection holes 11 and 21 are different, Since the positions of the sorting holes 11 and 21 are different, the structure will be bent to match the position of the sorting holes 11 and 21.

That is, the scraper rod 52 functionally passes through the secondary sorting hole 21 to solve the clogging of the secondary sorting hole 21, the secondary scraper portion 52a, the secondary scraper portion 52a ) Extends toward the primary trommel 10 and is inserted into the primary sorting hole 11 to solve the blockage of the primary sorting hole 11, divided into a primary scraper part 52b.

In the drawings, unexplained reference numeral 4 denotes a foreign substance conveyor that transports foreign substances that have passed through the sorting holes 11 and 21 of the primary trommel 10 and the secondary trommel 20.

The soil powder discharged from the discharge ends of the primary and secondary trommels 10 and 20 can be transported through each product conveyor or collected and transported on one product conveyor.

The dual earth dust sorting device for eliminating clogging of the sorting hole according to the present invention can be either a fixed type fixed to the aggregate treatment site or a movable type mounted on a vehicle and used while moving.

A method for sorting soil dust to eliminate clogging of the sorting hole according to the present invention is as follows.

1. Trommel drive and aggregate input.

Turning on the rotating means rotates the primary and secondary trommels 10 and 20, and for example, the aggregate (mixing of soil and foreign matter) that has passed through the vibrating screen is put into the primary trommel 10 through the hopper. do.

The soil powder falls on the entry guidance unit 15 and is dispersed while passing through the entry guidance unit 15.

2. First sorting of soil powder.

The aggregate that has passed through the entry induction part 15 is introduced into the primary trommel 10 and transferred to the discharge end of the primary trommel 10, and in this process, the selection hole 11 of the primary trommel 10 Through the sorting hole 11, soil powder and foreign matter having a particle size smaller than the size of the sorting hole 11 pass through the sorting hole 11 and are discharged to the bottom.

At this time, since the sorting hole 11 is continuous without interruption along the circumferential direction, soil and foreign substances are sorted through all parts of the sorting hole 11, and there is no part blocking the sorting hole 11, so this part It fundamentally solves the accumulation of soil and foreign matter in

In addition, while the primary trommel 10 is rotating, it passes through the primary scraper 30, which is a fixed body, and the scraper protrusion 32 of the primary scraper 30 is a selection hole of the primary trommel 10 ( 11) and inserted into the primary trommel 10, the free end is disposed inside the inner surface of the ring 12, so when the primary trommel 10 rotates, the scraper protrusion 11 22), and at this time, the soil and foreign substances that are fixed to the ring 12 of the primary trommel 10 and block the sorting hole 11 are removed from the ring 12 by the scraper protrusion 22 To eliminate the blockage of the sorting hole (11).

The scraper protrusion 22 is capable of not only solving the blockage of the sorting hole 11, but also striking (shaking) and dispersing the soil and foreign substances in the primary trommel 10, thus dropping the soil attached to the aggregate. Also induce.

During this process, soil powder and foreign substances having a size smaller than that of the sorting hole 11 pass through the sorting hole 11 and fall into the secondary trommel 20.

In addition, the soil powder having a size larger than that of the sorting hole 11 is discharged to the outside through the discharge end of the primary trommel 10 to be sorted.

3. Second sorting of soil powder.

The soil powder and foreign matter injected into the secondary trommel 20 are separated from each other through the separating hole 21 of the secondary trommel 20 and also eliminate the clogging of the separating hole 21 through the secondary scraper 40 And, since the action is the same as that of the primary screening by the primary trommel 10, a detailed description is omitted.

The foreign matter having a size smaller than that of the sorting hole 21 passes through the sorting hole 21 and falls on the foreign matter conveyor 4 below.

On the other hand, the soil powder having a size larger than that of the sorting hole 21 is discharged to the outside through the discharge end of the secondary trommel 20.

Hereinafter, another example of the configuration applied to the present invention will be described.

In the present invention, the scraper protrusions 32 and 42 adjust the length of the portions inserted into the primary and secondary trommels 10 and 20, so that even if the thickness of the rings 12 and 22 is varied, the scraper protrusions 32 and 42 Can be configured to be installed in an optimal position.

The method of adjusting the position of the scraper protrusions 32 and 42 is a method in which the scraper protrusions 32 and 42 are assembled to the fixing parts 31 and 41 so as to be able to move forward and backward, and the fixing parts 31 and 41 are attached to the frame. There is a way to be equipped with a true ability.

In addition, a plurality of scraper protrusions 32 and 42 may be configured as a detachable assembly type to the fixing portions 31 and 41, respectively. For example, insert the scraper protrusions (32,42) from the outside of the fixing parts (31,41) into the holes formed in the fixing parts (31,41), and from the outside of the fixing parts (31,41), lock nuts or pins, etc. It is possible to fix the scraper protrusions 32 and 42 to the fixing portions 31 and 41 through the fastener of the.

10: 1st trommel, 11, 21: selection hole
12,22: ring, 13,23: connecting rod
14,24: bridge, 15,25: entry guide
16,26: Advancement guidance department,
20: 2nd trommel,
30: primary scraper, 31,41: fixed part
32,42: scraper protrusion,
40: secondary scraper,

Claims (6)

A primary trommel 10 in which both sides in the longitudinal direction are opened to discharge the soil powder input from one side to the other side, while a selection hole 11 for sorting foreign matters is continuous along the longitudinal direction;
It is installed outside the primary trommel in a tubular structure having a diameter larger than that of the primary trommel, and passes through the selection hole 11 of the primary trommel through a continuous selection hole 21 along the longitudinal direction. A secondary trommel (20) for separating soil powder and foreign matter;
It is fixedly installed on the outer periphery of the primary and secondary trommel and includes a scraper for dropping soil in the sorting hole from the trommel,
The primary trommel and the secondary trommel are each arranged at a predetermined distance from each other in the longitudinal direction to form a sorting hole, a plurality of rings 12 and 22, and the legs 14 while being arranged in a direction transverse to the rings. ), including connection rods (13, 23) fixed to the rings through, the selection hole is formed in a continuous circle without disconnection along the circumferential direction,
The scraper includes a scraper protrusion formed protruding from each other at a predetermined interval along the sorting hole and inserted into the sorting hole between the rings to remove soil blocking the sorting hole, wherein the connecting rod is through the leg. It is spaced apart from the inside of the ring and does not interfere with the scraper protrusion, characterized in that it comprises one or more through-holes to eliminate clogging of the sorting hole, the double soil sorting device. The method according to claim 1, wherein the scraper is divided into a primary scraper 30 and a secondary scraper 40 respectively installed on the circumferences of the primary and secondary trommels. The double soil powder sorting device. The method according to claim 1, wherein the scraper extends from the secondary scraper portion 52a penetrating the sorting hole 21 at the periphery of the secondary trommel and the secondary scraper portion, and the selection hole of the primary trommel ( 11) A double soil powder sorting device for eliminating clogging of the sorting hole, characterized in that it is of a single type including a primary scraper part 52b inserted into it. The method according to any one of claims 1 to 3, wherein the primary trommel comprises an entry/exit guide portion formed of a non-porous portion without a selection hole at one or more of both sides in the longitudinal direction. Heavy soil sorting device. The device of claim 1 or 2, wherein the scraper protrusion is assembled so as to be able to move forward and backward, and the length of the scraper protrusion is adjusted to be inserted into the trommel. As a soil powder sorting method using a double soil powder sorting device that eliminates clogging of the sorting hole according to claim 1,
A first step of injecting an aggregate into the first trommel while rotating the primary and secondary trommels;
A second step of separating foreign substances having a size smaller than the sorting hole of the first trommel and discharging the soil powder having a size larger than the sorting hole from the soil powder input into the primary trommel through rotation of the primary trommel; and ;
Dirt and foreign substances that pass through the selection hole of the first trommel and fall into the second trommel are separated through the separation hole of the second trommel, and the foreign substances are dropped to the bottom of the selection hole and discharged. Including a third step of discharging soil powder of a size larger than the selection hole of Rommel,
In the second and third steps, the soil is sorted through all portions of the non-disrupted sorting hole along the circumferential direction, while the primary and secondary trommels are fixed through a scraper fixed to the periphery of the primary and secondary trommels. A method of sorting double soil powder to eliminate clogging of the sorting hole, characterized in that the sorting hole of the secondary trommel is not blocked.

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