JP2007289869A - Aggregate sand cleaning classification system - Google Patents

Abstract

[PROBLEMS] To remove small corners of aggregate sand and adhering foreign matter firmly fixed, especially in a sand cleaning classifying system for aggregates. Particularly, aggregate sand has high toughness and corners are difficult to remove. In the case where it is difficult to chip, there is also a problem that a large corner portion and a foreign substance lump cannot be removed even with an impact force that is applied only for a short time, and many remain.
A cleaning device 3 for cleaning and chamfering the aggregate sand 8 with a liquid, and a classification device for classifying the aggregate sand 8 after the cleaning and chamfering processing according to size. The cleaning apparatus 3 includes a pressure fluid 50 having a cavitation flow 49 toward the aggregate sand 8 flowing down from the input port 33 into the pipe 31. The primary cleaning device 3a provided with the spray nozzle 27 capable of spraying and the secondary cleaning device 3b provided with the rotating drum 76 capable of rolling the aggregate sand 8 therein.
[Selection] Figure 1

Description

  In the present invention, sand for aggregates such as natural sand, crushed sand, crushed stone, recycled sand (concrete glass, asphalt galley, architectural residue, racetrack sand, golf course sand), washing, chamfering treatment, classification treatment, etc. The present invention relates to a sand cleaning classification system for aggregate.

Traditionally, in Japan, aggregate sand has been collected from rivers, mountains, or the sea, but since these sands have been collected in large quantities, it has become difficult in recent years to collect high-quality sand from nature. It is coming. For this reason, aggregate materials such as so-called crushed stone have been frequently used. When producing high-quality sand to be aggregates for concrete from such aggregate materials, aggregates are used. By crushing the aggregate material and washing the aggregate sand consisting of the crushed crushed stone (hereinafter referred to as “aggregate sand”) with a liquid such as water, mud, wood chips, grass roots, etc. Impurities are removed.
However, since the aggregate sand produced from such crushed crushed stones has corners called edges, etc., when transporting concrete mixed with the aggregate with a mixer car, The corners hit the inner surface and the inner surface is greatly worn. In particular, cement or other foreign matter is firmly attached to the aggregate sand (hereinafter referred to as “attached foreign matter”), or these foreign matters are mixed in large quantities as a lump (hereinafter referred to as “foreign matter lump”). If so, the quality of the concrete will deteriorate significantly.
Therefore, while transporting the inside of the pipes of the cleaning device with high-pressure washing water, the aggregate sand is collided with the inner walls of these pipes in the straight pipe part or the closed outlet side end pipe part, or the aggregate. A technique for performing chamfering by causing sand to collide with each other is known (for example, Patent Document 1).
JP 2004-160414 A

However, among the corners, it is a relatively large corner and a small corner that can be removed by the impact force generated when the aggregate sand and the pipe inner wall or the aggregate sand collide at high speed. It is difficult to remove the foreign matter, and even with respect to the foreign matter, the foreign matter lump can be crushed and removed by this impact force, but it was difficult to remove the attached foreign matter firmly fixed to the aggregate sand. When the aggregate sand has high toughness and the corners are difficult to chip, or when a large amount of aggregate sand has to be processed at once, the force is large but the impact force that only acts for a short time is sufficient. There is also a problem that even large corners and foreign substance blocks often remain as they are without being removed.
On the contrary, when the toughness of the aggregate sand is low, before the large corners and foreign body lump are sufficiently removed, the aggregate sand body can not withstand the impact and cracks greatly, There was a problem that the shape and size of the finished aggregate sand product were not uniform and the quality deteriorated significantly.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
In Claim 1, the washing | cleaning apparatus which performs the washing | cleaning by a liquid with respect to aggregate sand, and a chamfering process, The classification apparatus which performs the classification process which classifies the aggregate sand after this washing | cleaning and chamfering process according to a size, In the aggregate sand cleaning classification system, the cleaning device includes an injection nozzle capable of spraying a pressure fluid having a cavitation flow from the inlet toward the aggregate sand flowing down into the pipe line. The primary cleaning device and the secondary cleaning device provided with a rotating drum capable of rolling the aggregate sand therein.
According to a second aspect of the present invention, a liquid and a gas, at least one of which is pressurized to a high pressure, are supplied to the injection nozzle, and a high-speed liquid and a gas such as a cavity generated in the liquid are provided around the gas. The pressure fluid is constituted by being surrounded by a cavitation flow consisting of
According to a third aspect of the present invention, a spiral protrusion that can guide the pressure fluid in a spiral direction is provided on the inner wall of the pipe of the primary cleaning device.
5. The auxiliary injection nozzle capable of additionally blowing pressure fluid to the aggregate sand being transferred by the pressure fluid from the injection nozzle at a middle portion of the pipe line of the primary cleaning device. Is provided.
According to a fifth aspect of the present invention, a spiral feed blade projects from the inner wall of the rotary drum, and the spiral feed blade can transfer the aggregate sand to the discharge side by the rotation of the rotary drum. .
According to a sixth aspect of the present invention, an inlet for the aggregate sand transported from the primary cleaning device is provided on the rotational axis of one end surface of the rotary drum, and the rotational axis of the other end surface of the rotary drum is provided. On the top, an injection port for replenishing a cleaning liquid is arranged to face the introduction port.
According to a seventh aspect of the present invention, the aggregate sand washing and classification system is provided with a liquid adding device for preliminarily infiltrating the aggregate sand before washing and chamfering treatment.
According to an eighth aspect of the present invention, the aggregate sand washing and classification system is provided with a liquid draining device for separating the liquid from the aggregate sand after the washing and the chamfering treatment.
In Claim 9, in the sand washing classification system for aggregate, while providing the drainage processing device which can reuse the drainage liquid after classification as the liquid, among the liquid and the gas supplied for the pressure fluid In this configuration, only the gas is pressurized to a high pressure.
According to a tenth aspect of the present invention, the classification device is provided with a vibration sieving device capable of classification in a plurality of stages.

Since this invention was comprised as mentioned above, there exists an effect shown below.
In other words, in claim 1, a cleaning device that performs cleaning and chamfering processing on the aggregate sand with a liquid, and classification that performs classification processing that classifies the aggregate sand after the cleaning and chamfering processing according to size. And an apparatus for cleaning the aggregate sand, wherein the cleaning apparatus is capable of spraying a pressure fluid having a cavitation flow from the inlet toward the aggregate sand flowing down into the pipeline. And a secondary cleaning device provided with a rotating drum capable of rolling the aggregate sand inside. In the secondary cleaning device, the aggregate sand and the rotating drum are provided. Can be applied for a long time between the inner walls of the steel or between the sands for aggregates, and small corners that could not be removed by the short impact force received by the primary cleaning device. And even foreign particles can be removed reliably. Kill. Especially when the aggregate sand has high toughness and the corners are difficult to chip, or when a large amount of aggregate sand has to be processed at once, the frictional force / shear during rolling for a long time Since the force repeatedly acts on the aggregate sand at every corner, it is possible to surely remove even large corners and foreign substance lumps that could not be removed by the primary cleaning device. Furthermore, by causing the rotating drum to rotate at a high speed or swinging and rotating, which is repeated forward transfer and reverse rotation, the aggregate sand is scraped up along the inner wall of the rotating drum and falls, and the rotating drum It can be made to collide with the bottom part, and the impact force at this time is added to the frictional force / shearing force, so that small corners and adhering foreign matter can be more reliably removed. Moreover, when the toughness of the aggregate sand is low, the impact force in the primary cleaning device can be set small so that the aggregate sand main body is not largely broken. That is, the amount of corners and foreign matter to be removed by the primary cleaning device is increased by adjusting the processing time in the secondary cleaning device and the rotational speed of the rotary drum to increase the amount of removal of corners and foreign matter. Therefore, it is possible to set the impact force small by slowing the transport speed of the aggregate sand in the primary cleaning device, and the aggregate sand main body is greatly cracked by the excessive impact force. It is possible to produce an aggregate sand product of good quality. In addition, for transporting aggregate sand in the primary processing equipment, a jet containing a large amount of cavities (hereinafter referred to as “cavitation flow”) is used instead of mere high-pressure washing water as in the prior art. In addition, the shock wave generated by the cavity collapse in the cavitation flow greatly acts on the aggregate sand, and the corner and foreign matter removal efficiency can be further enhanced.
According to a second aspect of the present invention, a liquid and a gas, at least one of which is pressurized to a high pressure, are supplied to the injection nozzle, and a high-speed liquid and a gas such as a cavity generated in the liquid are provided around the gas. Since the pressure fluid is constituted by being surrounded by a cavitation flow consisting of the above, a gas in which diffusion into the air occurs faster than the liquid can be positioned inside the cavitation flow, and the conventional pressure mainly composed of the liquid Unlike the fluid, the ejected pressure fluid spreads rapidly toward the inner wall of the pipeline at high speed immediately after the ejection, and the aggregate sand is carried to the inner wall of the pipeline and collides violently. The frequency of collision with the force and the inner wall of the pipe line is further increased, and the efficiency of removing corners and foreign matters can be further improved. Furthermore, the inner and outer surfaces of the cavitation flow can always be brought into contact with a large amount of gas, from which a large amount of small bubbles are taken into the cavitation flow as cavities or the small bubbles do not collapse as cavities. However, since a large amount of gas components serving as bubble nuclei of the cavity are dissolved in the liquid of the cavitation flow, the amount of the cavity of the cavitation flow is increased, and the generation of a shock wave when the cavity is collapsed can be promoted. In addition, since the outer surface of the pressure fluid is surrounded by a cavitation flow mainly composed of liquid and the inner wall of the pipe is always covered with a layer of liquid, the inner wall of the pipe is subjected to an impact from the aggregate sand. It is possible to greatly suppress thermal damage caused by the above, and to extend the pipeline life and reduce the maintenance cost of the primary cleaning device.
According to a third aspect of the present invention, a spiral protrusion that can guide the pressure fluid in a spiral direction is provided on the inner wall of the pipe of the primary cleaning device, so that the spiral protrusion closes the inner wall of the pipe. A spiral flow composed of pressure fluid and aggregate sand (hereinafter referred to as “spiral flow”) is formed, and the aggregate sand is separated from the pressure fluid by the centrifugal force action of this spiral flow to form a pipeline. It can be violently collided with the inner wall, and furthermore, the frequency of the aggregate sand being subjected to impact force due to the turbulent vortex generated by the spiral projection increases, thereby further improving the efficiency of removing corners and foreign matters. be able to.
5. The auxiliary injection nozzle capable of additionally blowing pressure fluid to the aggregate sand being transferred by the pressure fluid from the injection nozzle at a middle portion of the pipe line of the primary cleaning device. Therefore, even if the transfer speed of the aggregate sand due to the pressure fluid from the injection nozzle decreases in the middle, the transfer speed is again increased by the pressure fluid from the auxiliary injection nozzle joining the pressure fluid. Accelerated, impact force due to collision as well as shock wave due to cavity collapse can be maintained large over a long distance in the pipeline, and the amount of removal of corners and foreign matters can be further increased.
According to the fifth aspect of the present invention, a spiral feed blade projects from the inner wall of the rotary drum, and the spiral feed blade can transfer the aggregate sand to the discharge side by the rotation of the rotary drum. The aggregate sand can be moved on the inner wall of the lower part of the rotating drum, and at the same time, the aggregate sand can be pushed and transferred to the discharge side by the front and back surfaces of the spiral feed blades. Therefore, a complicated mechanism is not required for transfer from the discharge side to the discharge side, and the manufacturing cost can be reduced and the maintainability can be improved by reducing the number of parts. Furthermore, in addition to the aggregate sand and the inner wall of the rotating drum, or between the aggregate sands, frictional force / shearing force can be applied between the aggregate sand and the front and rear surfaces of the spiral feed blades. This can further improve the efficiency of removing corners and foreign matters.
According to a sixth aspect of the present invention, an inlet for the aggregate sand transported from the primary cleaning device is provided on the rotational axis of one end surface of the rotary drum, and the rotational axis of the other end surface of the rotary drum is provided. On the top, the injection port for replenishing the cleaning liquid is arranged opposite to the introduction port, so that the liquid can be ejected in the direction opposite to the direction of transport of the aggregate sand, Since the liquid is sprayed onto the sand, the detergency increases, and even small corners and foreign materials that have reattached to the sand for aggregates can be reliably washed and removed. Sand products for wood can be manufactured.
In the seventh aspect of the present invention, the aggregate sand cleaning and classifying system is provided with a liquid adding device that preliminarily infiltrates the aggregate sand before the cleaning and chamfering treatment, so that the liquid adheres to the aggregate sand. It penetrates into the interface with the foreign material and decreases the bonding strength between them, increasing the peelability of the adhered foreign material, or the liquid penetrates into the aggregate sand or foreign material mass and embrittles it. The chamfering and crushing of foreign matter lump can be facilitated, and the removal efficiency of the corners and foreign matter can be improved in the cleaning and chamfering processing to be performed later. Further, the gap between the aggregate sand to be supplied to the charging port of the cleaning device can be substantially filled with liquid, and the charging port can be closed with the aggregate sand and the liquid. The suction force due to the pressure fluid acts effectively on the aggregate sand in the inlet, strongly sucking the aggregate sand into the pipe line, greatly increasing the amount of aggregate sand processing, It is possible to further improve the efficiency of removing the portion and foreign matter.
In claim 8, the aggregate sand washing and classification system is provided with a liquid draining device for separating the liquid from the aggregate sand after the washing and chamfering treatment, so that the adhesiveness due to the mud liquid is reduced. Therefore, separation between aggregate sand, corners, foreign matters, and the like can be facilitated, and classification efficiency in classification processing to be performed later can be improved.
In Claim 9, in the sand washing classification system for aggregate, while providing the drainage processing device which can reuse the drainage liquid after classification as the liquid, among the liquid and the gas supplied for the pressure fluid Since only the gas is pressurized to a high pressure, it is not necessary to pressurize the liquid supplied to the injection nozzle to a high pressure, and the liquid is not subjected to a high-quality liquid treatment after low-class drainage after classification treatment. Can be reused, and the wastewater treatment cost can be greatly reduced, and the environmental conservation by the closed system can be promoted.
According to claim 10, since the classification device is provided with a vibration sieving device capable of classification in a plurality of stages, the aggregate sand having a desired size can be obtained by a simple operation simply by changing the size of the sieve eyes of each stage. In addition, it is possible to separate only the fine sieves, and even if a fine sieve is vibrated, clogging is unlikely to occur, and the classification efficiency can be greatly improved.

Next, embodiments of the invention will be described.
FIG. 1 is an overall configuration diagram of an aggregate sand cleaning classification system using a cleaning apparatus according to the present invention, FIG. 2 is a partial side sectional view of the entire primary cleaning apparatus, and FIG. 3 is an injection of the primary cleaning apparatus 4 is a partial cross-sectional side view of the nozzle, FIG. 4 is a partial cross-sectional side view of the straight pipe portion of the primary cleaning device, FIG. 5 is a partial partial cross-sectional view of the secondary cleaning device, and FIG. FIG. 7 is a partial side sectional view of the entire classifier, and FIG. 8 is a partial sectional side view of the entire vibration type cleaning apparatus.

First, the whole structure of the aggregate sand washing classification system 1 according to the present invention will be described with reference to FIG.
The aggregate sand cleaning and classifying system 1 includes an injection device 2 that conveys and inputs aggregate sand 8 from a storage location, and an injection nozzle for the aggregate sand 8 that is input from the input port 33 by the input device 2. A cleaning device 3 that performs cleaning and chamfering treatment with a pressure fluid from the pressure device 27, a liquid draining device 4 that removes moisture from the aggregate sand 8 discharged from the cleaning device 3, and a liquid draining device 4 A classification device 5 for classifying the aggregate sand 8 with a predetermined size, and a drainage treatment device 6 for reusing the waste water after the classification treatment by the classification device 5 to the cleaning device 3 and the like. . In the following description, the left and right are distinguished with reference to FIG. 1, and the right side is “right” and the left side is “left” in FIG. 1.

  In the charging device 2, a conveyor 10 is interposed between the storage place for the aggregate sand 8 and the cleaning device 3, and the aggregate sand as a raw material is provided on the starting end of the conveyor 10. A hopper 9 that introduces 8 onto the conveyor 10 is disposed, and a liquid addition device 7 that sprays water on the aggregate sand 8 is disposed above the middle of the conveyor 10. The liquid adding device 7 is formed of a spray header 11 and a plurality of spray nozzles 12, of which a conduit 14 is communicated with the spray header 11, and the conduit 14 is communicated with the drainage treatment device 6. Branching off from the main pipeline 13, the drainage from the drainage treatment device 6 can be supplied to the spray header 11 via the pipelines 13 and 14. The water sprayed from the spray nozzle 12 through the spray header 11 can enter the interface between the aggregate sand 8 and the adhered foreign matter, and the aggregate sand or the foreign matter mass itself, thereby adhering. The foreign matter is easily peeled off from the aggregate sand 8, and the aggregate sand 8 and the foreign matter lump itself can be made brittle.

  That is, the aggregate sand cleaning and classification system 1 is provided with the liquid adding device 7 for preliminarily infiltrating the liquid water into the aggregate sand 8 before the cleaning and the chamfering treatment. 8 and entering the interface between the adhering foreign matter and reducing the bonding strength between them, increasing the peelability of the adhering foreign matter, or water penetrating into the aggregate sand 8 and foreign matter lump, making it brittle, The chamfering of the aggregate sand 8 and the crushing of the foreign substance lump can be facilitated, and the removal efficiency of the corners and the foreign substance in the cleaning and the chamfering process to be performed later can be improved.

  The end portion of the conveyor 10 is extended to above the hopper 18 of the first cleaning device 3a described later, and the aggregate sand 8 containing water can be supplied into the hopper 18. ing. In such a configuration, the aggregate sand 8 introduced into the hopper 9 from the storage location falls onto the starting end of the conveyor 10 and is conveyed to the left, and in the middle of the conveyance, the spray nozzle 12 of the liquid adding device 7 is provided. After being sprinkled by 12..., It is put into the hopper 18 from the end of the conveyor 10.

Next, the cleaning device 3 will be described in detail with reference to FIGS.
As shown in FIG. 1, the cleaning device 3 is a primary cleaning device 3a that performs cleaning and chamfering treatment by spraying a pressure fluid having a cavitation flow onto the aggregate sand 8 conveyed from the above-described charging device 2. And a secondary cleaning device 3b that rolls the aggregate sand 8 that has been processed by the primary cleaning device 3a in a rotary drum to perform cleaning and chamfering processing.

First, the primary cleaning device 3a will be described.
As shown in FIG. 2, the primary cleaning device 3a includes an injection nozzle 27 for injecting a pressure fluid, a carry-in pipe portion 28 for introducing the aggregate sand 8, and an aggregate sand that is transferred at high speed by the pressure fluid. 8 includes a straight pipe part 29 that removes corners and foreign matters by colliding with a pipe wall and the like, and a bent pipe part 30 that changes the flow of pressure fluid immediately after jetting in a substantially vertical direction. A continuous pipe 31 is constituted by 30.

  As shown in FIGS. 1 and 2, the carry-in pipe section 28 has a large-diameter section 51 having a larger diameter than the straight pipe section 29, and the left end of the large-diameter section 51 is blocked by the injection nozzle 27. In addition, a branch pipe 32 is formed in the middle portion of the large diameter portion 51 and is directed upward in a direction substantially perpendicular to the injection direction of the pressure fluid injected from the injection nozzle 27. The lower end of the branch pipe 32 forms an input port 33 communicating with the large-diameter portion 51, while the upper end of the branch pipe 32 is connected to the lower end of the hopper 18, and the hopper 18 has Thus, the aggregate sand 8 sprinkled with the liquid adding device 7 during the transfer of the charging device 2 is charged.

  For this reason, the gap between the aggregate sand 8 is filled with water in the hopper 18, and the charging port 33 is closed with a mixture of the aggregate sand 8 and water. For this reason, even if the pressurized fluid is ejected from the ejection nozzle 27 at high speed and the air is discharged and the pressure in the conduit 31 becomes negative (hereinafter referred to as “negative pressure effect”), the outside air is used for the aggregate. The pressure does not increase due to leakage into the carry-in pipe portion 28 from the gap between the sands 8, and the negative pressure effect strongly sucks the mixture composed of the aggregate sand 8 and water into the carry-in pipe portion 28. can do.

  That is, since the liquid adding device 7 as described above is provided, the gap between the aggregate sand 8 supplied to the charging port 33 to the cleaning device 3 is substantially filled with water, and the charging port 33 is filled with the aggregate sand. 8 and water, and the suction force by the pressure fluid ejected from the ejection nozzle 27 effectively acts on the aggregate sand 8 in the inlet 33, and the aggregate sand 8 is piped. It can be strongly sucked into the road, the processing amount of the aggregate sand 8 can be greatly increased, and the removal efficiency of corners and foreign matters can be further improved.

  As shown in FIGS. 1 to 3, the injection nozzle 27 includes an inner flow pipe 34 having an inner flow path 35 through which pressurized air flows, and an outer flow path 37 that surrounds a front portion of the inner flow pipe 34 and through which cleaning water flows. The inner flow tube 34 is screwed to the left end of the outer flow tube 36 so as to be movable left and right.

  The inner flow pipe 34 is connected to a high-pressure pump 40 via an air supply pipe 39, and by driving the high-pressure pump 40, high-pressure pressurized air is introduced into the inner flow path 35 via the air supply pipe 39. Is to be supplied. In the inner flow path 35, a large diameter portion 35a having substantially the same diameter as the inner diameter of the air supply tube 39, a throttle portion 35b that expands to the left, and a tube expansion portion 35c that expands to the right are formed in this order from the left. The high-pressure pressurized air sent from the air supply pipe 39 increases rapidly at a high speed from the tip of the inner flow pipe 34 after the flow velocity is remarkably increased due to a reduction in the cross-sectional area of the flow path while passing through the inner flow path 35. It is made to erupt while expanding.

  In the outer flow pipe 36, a downward branch portion 43 is formed in the middle of the main pipe portion 42, and the branch portion 43 is connected to the conduit 15, and the drainage treatment that has been pumped by the pump 17. The water from the apparatus 6 is supplied as cleaning water from the main pipeline 13 through the pipeline 15 into the outer flow path 37. Further, the main pipe part 42 has a flange 42a at the right end, and the flange 42a is detachable by a flange 44a and a bolt 46 of the front taper pipe 44 connected to the left end of the large diameter part 51 of the carry-in pipe part 28. While being connected, an annular taper portion 36 a that expands to the left is fitted on the inner wall of the right end of the main pipe portion 42. A tapered portion 34a formed at the distal end of the inner flow pipe 34 is inserted into the tapered portion 36a. From the gap 47 provided between the tapered portion 34a and the tapered portion 36a, the outer flow path 37 is inserted. The washing water inside is sucked into the large diameter portion 51 by the pressurized air ejected at high speed.

  In such a configuration, the inner flow pipe 34 is rotated about the axial center and moved to the right, and the tapered portion 34a of the inner flow pipe 34 is brought into contact with the taper portion 36a of the outer flow pipe 36 to thereby form the gap 47. Is eliminated, the washing water in the outer flow path 37 is not supplied, but only high-speed pressurized air accelerated through the inner flow path 35 of the inner flow pipe 34 is supplied, and the expanded portion 35c at the tip of the inner flow pipe 34 is supplied. Then, the pressurized air 48 is ejected so as to spread widely in the air. From this state, when the inner flow pipe 34 is rotated backward about the axis and moved to the left, the tapered portion 34a of the inner flow pipe 34 is separated from the tapered portion 36a of the outer flow pipe 36 to form the gap 47, Wash water in the outer flow path 37 is supplied through the gap 47.

  This washing water is strongly sucked by the negative pressure effect of the high-speed pressurized air from the inner flow pipe 34 and passes through the narrow gap 47 at a high speed. At that time, the pressure rapidly decreases in the washing water. As a result, a cavitation flow 49 containing a large amount of the cavity is generated, and the cavitation flow 49 surrounds the periphery of the pressurized air 48 ejected so as to expand from the tip of the inner flow pipe 34. Thus, the pressure fluid 50 is formed.

  In this way, when the pressure fluid 50 having the pressurized air 48 at the center of the injection axis that is more rapidly diffused into the air than the water is formed, the pressure fluid 50 is expanded to the right before the tapered tube 44. It is sprayed into the large-diameter portion 51 so as to greatly expand along the inner wall surface, and is sprayed from the hopper 18 to the aggregate sand 8 flowing down through the insertion port 33. Then, the aggregate sand 8 is carried at a high speed obliquely toward the inner wall of the pipe line 31 by the pressurized fluid 50 that is to be expanded by the pressurized air 48 and collides violently. The aggregate sand 8 that has collided is rolled up in the pressure fluid 50 and transferred as it is, or is blown away by the pressure fluid 50 and transferred while repeatedly colliding with the inner wall of the pipe line. At the same time, in the cavitation flow 49 surrounding the pressurized air 48, when the flow velocity is lowered and the pressure is recovered after the jetting, the contained cavity is collapsed, and the shock wave generated by the cavity collapse is applied to the aggregate sand 8. It will be added as an impact force.

  That is, at least one of the jet nozzle 27 is supplied with a liquid and a gas pressurized at a high pressure, and the surroundings of the pressurized air 48 of the gas are generated in the high-speed liquid washing water and the washing water. Since the pressure fluid 50 is constituted by being surrounded by a cavitation flow 49 composed of a gas such as a cavity, the pressurized air 48 in which the diffusion into the air occurs faster than the liquid is positioned inside the cavitation flow 49. Unlike the conventional pressure fluid mainly composed of liquid, the ejected pressure fluid 50 carries the aggregate sand 8 to the inner wall of the duct while expanding greatly toward the inner wall of the duct at a high speed immediately after the ejection. Therefore, the impact force received by the aggregate sand 8 and the frequency of collision with the inner wall of the pipe line are further increased, and the efficiency of removing corners and foreign matters can be further increased. Further, the inner and outer surfaces of the cavitation flow 49 can always be brought into contact with a large amount of air, and a large amount of small bubbles are taken into the cavitation flow 49 as a cavity from the air or the small bubbles do not collapse as a cavity. Even so, since a large amount of gas components that become bubble nuclei of the cavity dissolve in the liquid washing water of the cavitation flow 49, the amount of the cavity of the cavitation flow 49 increases, and the generation of a shock wave when the cavity collapses is promoted. it can. In addition, the outer surface of the pressure fluid 50 is surrounded by a cavitation flow 49 mainly composed of washing water, and the inner wall of the pipe is always covered with the washing water layer. The thermal damage due to the impact received from 8 can be greatly suppressed, the pipeline life can be extended, and the maintenance cost of the primary cleaning device 3a can be reduced.

  In this embodiment, only air is pressurized to a high pressure, and the washing water is sucked in by the negative pressure effect of this high-speed pressurized air so that a pressure fluid is formed. The pressure may be increased to a high pressure. Or conversely, only the surrounding washing water may be pressurized to a high pressure, and the air may be sucked in as suction air by the suction effect of the high-pressure washing water to form a pressure fluid. However, in such a high-pressure pump used to pressurize the washing water to a high pressure, if the low-quality waste water after washing and chamfering treatment or classification treatment is used as it is, it may cause a pump failure. It is necessary to perform advanced water quality improvement in the device 6. In other words, if cleaning water pressurized to a high pressure is not used, low-quality wastewater can be reused as it is simply by performing simple water treatment with the drainage treatment device 6.

  That is, as in the present embodiment, in the aggregate sand cleaning classification system 1, a wastewater treatment device 6 that can reuse wastewater that is drained after the classification treatment as cleaning water is provided, and the pressure fluid 50 By adopting a configuration in which only the gas of the liquid and gas supplied for use is pressurized to a high pressure, there is no need to pressurize the cleaning water supplied to the spray nozzles such as the spray nozzle 27 and the auxiliary spray nozzle 55 described later. In addition, low-quality wastewater after classification treatment can be reused for the washing water without performing advanced water treatment, and wastewater treatment costs can be greatly reduced and environmental conservation can be promoted by a closed system. be able to.

  As shown in FIGS. 1, 2, and 4, the straight pipe portion 29 includes a short pipe 52 having a smaller diameter than the large diameter portion 51 and a straight pipe 53 having a diameter substantially the same as the short pipe 52. A flange 53a is provided at the left end of the pipe 53, and the flange 53a and the flange 52a at the right end of the short pipe 52 are connected by a bolt 46, while a flange 53b is also provided at the right end of the straight pipe 53. A flange 56 a at the left end of the bent pipe portion 30 is connected by a bolt 46. As a result, the straight pipe 53 occupying most of the straight pipe portion 29 can be removed and replaced from the primary cleaning device 3a, and the aggregate sand 8 can be replaced without replacing the entire primary cleaning device 3a. It is only necessary to replace the straight pipe 53 that is greatly damaged by the collision, and the assembly and maintenance of the primary cleaning device 3a can be improved.

  Here, a taper tube 45 is formed between the large-diameter portion 51 and the short tube 52 after being expanded to the left, and is sprayed to the aggregate sand 8 within the large-diameter portion 51. After that, the pressure fluid 50 combined with the pressure fluid is squeezed by the taper tube 45 and then enters the straight tube 53 through the short tube 52 at a high speed. As a result, the initial speed of the aggregate sand 8 in the straight pipe portion 29 can be made as fast as possible, and a decrease in the transfer speed of the aggregate sand 8 in the straight pipe portion 29 is prevented as much as possible. 8 and the inner wall of the duct or the sand for aggregate can collide at high speed.

  Further, on the inner wall 53c of the straight pipe 53 to which the aggregate sand 8 is transferred at a high speed in this way, a spiral protrusion 54 protruding toward the axial center of the straight pipe 53 is provided. The spiral projection 54 is formed of a spiral plate member 57, and the plate member 57 is inserted from the end opening of the straight tube 53, and the outer peripheral end 57a is fixed to the inner wall 53c of the straight tube 53 by welding or the like. Alternatively, a spiral groove is engraved in the inner wall 53c, and the plate member 57 is screwed into the straight tube 53 while turning the plate member 57 so that the outer peripheral end 57a is fitted in the groove, so that the plate member 57 is locked to the inner wall 53c. It may be.

  In such a configuration, the spiral groove 58 is formed between the left and right side surfaces 57 b and 57 c opposed by the plate member 57 and the inner wall 53 c of the straight pipe 53, and the aggregate sand 8 is placed in the straight pipe 53. When the accompanying pressure fluid flows, it flows into the spiral groove 58, and a spiral flow along the spiral groove 58 is generated in the vicinity of the inner wall 53c. For this reason, the aggregate sand 8 in the vicinity of the plate material 57 is transferred while swirling along a spiral flow, and most of the aggregate sand 8 is quickly separated from the pressure fluid by the centrifugal force action generated at this time. And frequently violently collides with the inner wall 53c. Further, the pressure fluid flowing on the axial center of the straight pipe 53 flows so as to pass through the spiral center of the plate member 57 of the spiral projection 54, but tends to be a turbulent vortex in the vicinity of the inner peripheral end 57d of the plate member 57, When the aggregate sand 8 being transported on the axial center is caught in the turbulent vortex, the frequency with which the aggregate sand 8 collides with the left side surface 57b and the inner peripheral end 57d of the plate member 57 is remarkably increased.

  That is, since the spiral projection 54 capable of guiding the pressure fluid in the spiral direction is provided on the inner wall of the pipeline of the primary cleaning device 3a, the straight projection 53, which is a pipeline, is formed by the spiral projection 54. A spiral flow composed of pressure fluid and aggregate sand 8 is formed in the vicinity of the inner wall 53a, and the aggregate sand 8 is separated from the pressure fluid by the centrifugal force action of this spiral flow to the inner wall 53a of the straight pipe 53. It can be violently collided, and further, the frequency of the impact of the sand for the aggregate due to the turbulent vortex generated by the spiral projection 54 is increased, thereby further improving the efficiency of removing the corners and foreign matters. Can do it. The spiral protrusion 54 may be a coiled thick wire instead of the plate material 57, and the coiled wire may be stretched in the straight pipe 53 using its elastic force. If it can guide | invade in a spiral direction, the form and attachment method of a helical protrusion will not be specifically limited.

  A mounting portion 53d is opened in the lower part of the straight pipe 53, and an auxiliary injection nozzle 55 having the same structure as that of the injection nozzle 27 is attached to the mounting portion 53d. The auxiliary injection nozzle 55 includes an inner flow pipe 59 having an inner flow path 60 through which pressurized air flows, and a T-shaped outer flow pipe 61 having an outer flow path 62 surrounding the inner flow pipe 59 and flowing through washing water. The inner flow pipe 59 is screwed into the left end of the outer flow pipe 61 so as to be movable left and right.

  The internal flow pipe 59 is connected to the high-pressure pump 40 via an air supply pipe 63, and when the high-pressure pump 40 is driven, high pressure is applied to the internal flow path 60 via the air supply pipe 63. Air is supplied. In the inner flow path 60, a large diameter portion 60a, a throttle portion 60b, and a pipe expansion portion 60c, which are substantially the same as the inner diameter of the air supply pipe 63, are formed in order from the left, and high-pressure pressurized air from the air supply pipe 63 is While passing through the inner flow path 60, the flow velocity is remarkably increased due to a decrease in the cross-sectional area of the flow path, and then the liquid is ejected from the front end of the inner flow pipe 59 while greatly expanding.

  The outer flow pipe 61 has a downward branching portion 65 formed in the middle of the main pipe portion 64, and the branching portion 65 is connected to a conduit 66, and the drainage pumped by the pump 17 is used as a main pipe. Washing water is supplied from the passage 13 through the conduit 66 into the outer passage 62. Further, a taper portion 61a is fitted on the inner wall at the right end of the main pipe portion 64, and a taper portion 59a at the tip of the inner flow tube 59 is inserted into the taper portion 61a, and the taper portion 59a and the taper portion are inserted. The washing water in the outer flow path 62 is sucked by the pressurized air ejected at a high speed from the gap 68 between the portion 61a. The front portion of the outer flow pipe 61 is connected to the attachment portion 53d through a communication pipe 67.

  In such a configuration, when the inner flow pipe 59 is rotated and the gap 47 is adjusted, in the same manner as the injection nozzle 27, the inside is pressurized while being greatly expanded from the front end of the inner flow pipe 59 at a high speed. Air 69 is supplied to the outside, and a cavitation flow 70 composed of wash water strongly sucked by the negative pressure effect of the high-speed pressurized air 69 and a cavity generated in the wash water is supplied to the pressure fluid. 71 is formed, and the pressure fluid 71 is ejected into the straight pipe 53 through the communication pipe 67. Thereby, the pressure fluid 71 from the auxiliary injection nozzle 55 is merged with the pressure fluid 50 that is jetted from the injection nozzle 27 and decelerated while passing through the pipe 31, and the aggregate sand 8 is transferred by the pressure fluid 50. The velocity and the amount of cavity in the cavitation flow 49 can be recovered.

  That is, an auxiliary injection nozzle capable of additionally blowing pressure fluid to the aggregate sand 8 being transferred by the pressure fluid from the injection nozzle 27 in the middle of the pipe line 31 of the primary cleaning device 3a. 55 is provided, the pressure fluid 71 from the auxiliary injection nozzle 55 joins the pressure fluid 50 even if the transfer speed of the aggregate sand 8 by the pressure fluid 50 from the injection nozzle 27 decreases midway. As a result, the transfer speed is accelerated again, and not only the impact force due to the collision but also the shock wave due to the cavity collapse can be maintained large over a long distance in the pipeline, and the amount of removal of corners and foreign matters can be further increased. It can be done.

  As shown in FIGS. 1 and 2, the bent pipe portion 30 has a main pipe portion 56 having substantially the same diameter as the right end of the straight pipe 53 of the straight pipe portion 29, and the left end of the main pipe portion 56 is the same as that described above. As described above, the straight pipe portion 29 is detachably connected via the flanges 53b and 56a. In the middle of the main pipe portion 56, a downward branch portion 72 is formed in a direction substantially perpendicular to the injection direction of the pressure fluid 50 injected from the injection nozzle 27, and the branch portion 72 is formed in the secondary cleaning. The aggregate sand 8 which is connected to the pressure feeding pipe 73 to the apparatus 3b and which has been cleaned or chamfered by the primary cleaning apparatus 3a is supplied with the washing water or the like through the pressure feeding pipe 73. The pressure is fed to the secondary cleaning device 3b.

  Further, a branch part 74 is formed in the right part of the main pipe part 56 in the same direction as the injection direction of the pressure fluid 50 injected from the injection nozzle 27, and the branch part 74 has a flange 74a at the right end. The flange 74a is connected to the fixing plate 75 and the bolt 46, and the right end of the branch portion 74 is freely closed or removable. Thereby, even when the inside of the bending pipe part 30 is damaged due to the collision of the aggregate sand 8 and the pressure fluids 50 and 71 and the periodic replacement is required, the bending pipe part 30 that has reached the end of its life is easily replaced. And maintainability can be improved.

The secondary cleaning device 3b will be described.
As shown in FIGS. 1 and 5, the secondary cleaning device 3 b includes a rotating drum 76 having a rotation axis substantially horizontally, and bearing devices 81 and 82 that pivotally support the left and right ends of the rotating drum 76. The driving device 84 rotates the rotary drum 76, and the discharge cylinder 93 discharges the processed aggregate sand 8 from the rotary drum 76.

  In the rotary drum 76, a large-diameter main body drum 77 is formed in the approximate center, a support cylinder 95 is formed at the right end of the main body drum 77, and the pressure feed pipe 73 is formed at the right end of the support cylinder 95. An introductory pipe 79 communicated via a bent pipe 96 penetrates the rotational axis of the rotating drum 76 toward the left. On the other hand, a discharge drum 78 squeezed to the left is connected to the left end of the main body drum 77 on the same axis as the main body drum 77, and the support cylinder 95 having a smaller diameter than the main body drum 77 is disposed at the left end of the discharge drum 78. And a left opening end of the support cylinder 94 is rotatably inserted into a side hole 93a on the side surface of the discharge cylinder 93 that is erected. A discharge pipe 25 communicates with the lower end of the discharge cylinder 93, and the lower end of the discharge pipe 25 extends to the hopper 19 of the liquid draining device 4.

  The left bearing device 81 includes a roller receiver 90 provided on the outer periphery of the left support cylinder 94, and a pair of support rollers 89 and 89 that support the roller receiver 90 at two points at the bottom. Similarly, the right bearing device 82 includes a roller receiver 92 provided on the outer periphery of the right support cylinder 95, and a pair of support rollers 91 and 91 that support the roller receiver 92 at two points at the bottom. The left and right support rollers 89 and 89 and the support rollers 91 and 91 enable the rotary drum 76 to rotate.

  Further, on the outer periphery of the right support cylinder 95, a driven gear 88 is provided adjacent to the right side of the roller receiver 92. The driven gear 88 is fixed to an output shaft 86 from a motor 85. The gear 87 is meshed, and the driving device 84 including the motor 85, the output shaft 86, the driven gear 88, the driving gear 87, and the like is controlled, so that the driving force of the motor 85 causes the driving gear 87 to move from the output shaft 86. The rotary drum 76 transmitted to the driven gear 88 and pivotally supported by the left and right bearing devices 81 and 82 can be driven to rotate.

  As shown in FIGS. 5 and 6, a spiral feed blade 83 having a simple configuration that does not include a complicated mechanism protrudes toward the rotation axis in the rotary drum 76 that is controlled to rotate in this way. Has been. The spiral feed blade 83 includes a discontinuous feed blade 97 composed of a plurality of plate materials 99 and a continuous feed blade 98 composed of a single continuous plate material 100.

  Among these, the discontinuous feed blade 97 fixes the outer ends 99a of a plurality of small plate members 99 by welding or the like at a predetermined helical circumferential interval 106 at a spiral position on the inner wall 77a of the main body drum 77. The left and right side surfaces 99 b and 99 c that are opposed to each other by the plate material 99 and the inner wall 77 a of the main body drum 77 form a spiral groove 101 having a spiral axis direction interval 103. Further, in the discontinuous feed blade 97, a plurality of scraping plates 142 are installed in the spiral axis direction between adjacent plate members 99, that is, in the spiral groove 101, and the scraping plate 142 has a rotational axis. And projecting to substantially the same height as the plate 99. On the other hand, the continuous feed blade 98 is formed by fixing the outer peripheral end 100 a of the spiral plate member 100 on the inner wall 78 a of the discharge drum 78 by welding or the like, and the left and right side surfaces opposed by the plate member 100. A spiral groove 102 having a helical axis direction interval 104 narrower than the helical axis direction interval 103 is formed by 100b and 100c and the inner wall 78a of the discharge drum 78.

  On the spiral axis of the opening formed by the inner peripheral end 100d of the plate member 100 of the continuous feed blade 98, an injection pipe 80 for supplying cleaning water into the right main body drum 77 is located to the right. While extending, the left end of the injection pipe 80 passes through the discharge cylinder 93 and is connected to a pipeline 16 branched from a main pipeline 13 communicated with the drainage treatment device 6. As a result, the water from the drainage treatment apparatus 6 that has been pumped by the pump 17 is supplied as cleaning water from the main pipe 13 to the main body drum 77 through the pipe 16.

  In such a configuration, the aggregate sand 8 transferred from the primary cleaning device 3a through the pressure feed pipe 73, and the removed corners and foreign matter are removed together with the cleaning water by the introduction pipe 79. Is introduced into the main body drum 77 rotated by the driving device 84. The aggregate sand 8 or the like thus introduced flows into the spiral groove 101 of the discontinuous feed blade 97, and is sandwiched between the left and right side surfaces 99b and 99c of the plate material 99 as the rotary drum 76 rotates. In this way, it is moved toward the left side, that is, the discharge side, particularly by being pushed by the left side surface 99b. At this time, the aggregate sand 8 rolls on the inner wall 77a below the main body drum 77 and is gradually transferred to the discharge side while repeatedly colliding with the aggregate sand 8 or the side surfaces 99b and 99c. Therefore, friction and shearing force can be applied to the aggregate sand 8 over a long period of time.

  The aggregate sand 8 and the like transferred to the left end of the main body drum 77 flows into the spiral groove 102 of the continuous feed blade 98 formed in the discharge drum 78. The spiral groove 102 has an interval 104 in the spiral axis direction that is narrower than the interval 103 in the spiral axis direction of the spiral groove 101, and the discharge drum 78 is squeezed to the left and the inner wall 78a is inclined obliquely upward to the left. The same frictional force and shearing force as in the main body drum 77 act on the aggregate sand 8 and the like, and the aggregate sand 8 and the like increase in packing density while being transported to the discharge side, so that it is separated from the washing water. move on. Then, when it is transferred to the left end of the discharge drum 78, it is discharged from the support tube 94 through the discharge tube 93 into the discharge tube 25 in a state of being filled with high density.

  Further, during the transfer, when the rotary drum 76 is rotated at high speed or oscillated and rotated by the driving device 84, the aggregate sand 8 is scraped up along the inner walls 77a and 78a of the rotary drum 76. After that, the operation of dropping is repeated, whereby a repeated impact force can be applied to the aggregate sand 8. In particular, when the scraping plate 142 is provided in the spiral groove 101 as in the present embodiment, the aggregate sand 8 can be lifted up to a high position on the scraping plate 142 and dropped, and the aggregate can be dropped. An even greater impact force can be applied to the sand 8. Moreover, in the present invention, since the cleaning and the chamfering process are performed in two stages of the primary cleaning device 3a and the secondary cleaning device 3b, the driving device 84 is appropriately controlled to perform the secondary cleaning device. The frictional force, the shearing force, and the impact force acting on the aggregate sand 8 in the step 3b are increased so that the impact force acting on the aggregate sand 8 can be reduced by the primary cleaning device 3a. Is also possible.

  That is, a cleaning device 3 that performs cleaning and chamfering processing on the aggregate sand 8 with a liquid, and a classification device 5 that performs classification processing to classify the aggregate sand 8 after the cleaning and chamfering processing according to size. In the aggregate sand cleaning and classification system 1, the cleaning device 3 sprays a pressure fluid 50 having a cavitation flow 49 toward the aggregate sand 8 flowing down from the input port 33 into the pipe 31. The secondary cleaning device 3a is provided with a spray nozzle 27 that can perform the cleaning, and the secondary cleaning device 3b is provided with a rotary drum 76 that can roll the aggregate sand 8 therein. In the apparatus 3b, a frictional force / shearing force can be applied for a long time between the aggregate sand 8 and the inner walls 77a and 78a of the rotary drum 76 or between the aggregate sands 8; It cannot be removed with just a short impact force. Even small corners and adhering foreign matters had Tsu, can be reliably removed. In particular, even when the aggregate sand 8 has high toughness and the corners are not easily chipped, or when a large amount of aggregate sand 8 has to be processed at once, the frictional force during rolling for a long time Since the shearing force repeatedly acts on the aggregate sand 8 at every corner, it is possible to surely remove even large corners and foreign matter lumps that could not be removed by the primary cleaning device 3a. Furthermore, by causing the rotary drum 76 to rotate at high speed or swing, the aggregate sand 8 is scraped up along the inner walls 77 a and 78 a of the rotary drum 76 and then falls and collides with the bottom of the rotary drum 76. In this case, the impact force at this time is added to the frictional force / shearing force, and the small corners and adhered foreign matters can be more reliably removed. Moreover, when the toughness of the aggregate sand 8 is low, the impact force in the primary cleaning device 3a can be set small so that the aggregate sand main body is not largely broken. That is, by adjusting the processing time in the secondary cleaning device 3b, the rotational speed of the rotary drum 76, etc., and increasing the removal amount of corners and foreign matters, the corners to be removed by the primary cleaning device 3a Since the amount of foreign matter is small, the impact force can be set small by slowing the transfer speed of the aggregate sand 8 in the primary cleaning device 3a. The main body can be prevented from being largely cracked, and a good quality sand product for aggregate can be produced. Further, the transport of the aggregate sand 8 in the primary processing apparatus 3a uses a cavitation flow 49 including a large amount of cavities instead of a conventional high-pressure washing water. Shock waves generated by the collapse of the cavity inside act on the aggregate sand 8 greatly, and the removal efficiency of the corners and foreign matters can be further enhanced.

  In particular, discontinuous feed blades 97 and continuous feed blades 98 which are spiral feed blades 83 project from the inner walls 77a and 78a of the rotary drum 76 of this embodiment, and the feed blades 97 and 98 serve as the rotary drum 76. Since the aggregate sand 8 can be transported to the discharge side by rotation, the aggregate sand 8 rolls on the inner walls 77a and 78a below the rotary drum 76 and at the same time before and after the feed blades 97 and 98. The left and right side surfaces 99b, 99c, 100b, 100c, which are surfaces, can push and transfer the aggregate sand 8 to the discharge side, and it is complicated to transfer the aggregate sand 8 from the introduction side to the discharge side. A mechanism is not necessary, and it is possible to reduce manufacturing costs and improve maintainability by reducing the number of parts. Further, in addition to the aggregate sand 8 and the inner walls 77a and 78a of the rotary drum 76, or the aggregate sand 8, the aggregate sand 8 and the left and right side surfaces 99b and 99c, 100b and 100c of the feed blades 97 and 98, A frictional force / shearing force can also be applied between them, and the removal efficiency of corners and foreign matters can be further increased.

  An injection port 80a is opened at the right end of the injection / injection pipe 80 so as to face the introduction port 79a, and the cleaning water 105 is injected into the main body drum 77 from the injection port 80a. The sprayed cleaning water 105 is transferred not only through the space in the spiral axis direction inside the inner end 99d of the plate member 99 but also through the wide gap 108 formed between the adjacent plate members 99 and having a spiral circumferential interval 106. It can be sprayed on the aggregate sand 8 or the like.

  That is, an introduction port 79a for the aggregate sand 8 transferred from the primary cleaning device 3a is provided on the rotation axis of the one end surface of the rotary drum 76, and the rotation shaft of the other end surface of the rotary drum 76 is provided. Since the injection port 80a for replenishing the cleaning liquid is disposed opposite to the introduction port 79a, the cleaning water 105, which is a liquid, is ejected in the direction opposite to the transfer direction of the aggregate sand 8. Since the cleaning water 105 is sprayed onto the aggregate sand 8 that comes toward the surface, the cleaning power increases, and even small corners and foreign matters that have reattached to the aggregate sand 8 can be reliably cleaned and removed. A good quality aggregate sand product free from impurities such as parts and foreign matter can be produced.

Next, the liquid draining device 4 will be described with reference to FIG.
In the liquid draining device 4, an inclined conveyor 20 is interposed between the secondary cleaning device 3 b and the classification device 5, and the hopper 19 is disposed at the start end of the inclined conveyor 20. Thus, aggregate sand 8 or the like from the discharge pipe 25 of the secondary cleaning device 3b falls on the starting end of the inclined conveyor 20.

  The inclined conveyor 20 is wound between the first pulley 23 disposed below the discharge pipe 25 and the second pulley 24 disposed higher than the first pulley 23 so as to be circulated and driven. Thus, the aggregate sand 8 and the like can be conveyed to the hopper 26 of the classification device 5. Furthermore, a plurality of nozzles 22 connected to the air blower 21 are disposed from the middle part to the end part of the inclined conveyor 20, and the compressed air discharged from the air blower 21 is used for the aggregate on the inclined conveyor 20. It sprays on sand 8 etc.

  As a result, the aggregate sand 8 and the like are drained by the compressed air while slowly rising toward the second pulley 24 together with the inclined conveyor 20, and the aggregate sand or the aggregate sand and other impurities are removed. After the moisture to be connected is removed, when the inclined conveyor 20 circulates along the second pulley 24, it is separated from the inclined conveyor 20 in the vicinity of the top of the second pulley 24 and put into the hopper 26.

  That is, the aggregate sand cleaning and classification system 1 is provided with a liquid draining device 4 for separating water as liquid from the aggregate sand 8 after the cleaning and chamfering treatment, so that adhesion by mud liquid is performed. Therefore, it is possible to easily separate the aggregate sand 8, the corners, the foreign matters, and the like, and to improve the classification efficiency in the subsequent classification process 5.

Next, the classification device 5 will be described with reference to FIGS.
In the classification device 5, a vibration sieving device 109 is disposed below the hopper 26 into which the aggregate sand drained by the liquid draining device 4 is put. In the vibration sieve device 109, coarse and fine sieves 111 and 112 are arranged substantially parallel in the vertical direction in the device case 110, and the lower end of the hopper 26 is positioned above the coarse sieve 111 in the upper position. The aggregate sand or the like is supplied from the hopper 26 to the vibration sieve device 109 and is further classified by the fine sieve 112 after passing through the coarse sieve 111.

  In such a configuration, aggregate sand or the like (hereinafter referred to as “coarse sand”) 114 captured by the coarse sieve 111 passes through the hopper 117 from the lower end of the oblique coarse sieve 111. Fall into the storage unit 120 for coarse sand. Further, aggregate sand or the like (hereinafter referred to as “appropriate sand”) 115 passing through the coarse screen 111 and captured by the fine screen 112 flows out from the lower end with the oblique fine screen 112. After falling to the start end of the conveyor 123 and transported by the conveyor 123, it passes from the terminal end through the hopper 118 to the storage unit 121 for the appropriate sand 115. A header 125 connected to the air blower 124 is disposed above the middle part of the conveyor 123, and a plurality of nozzles 126 are provided on the header 125, and the compressed air discharged from the air blower 124 is supplied to the header 125. The appropriate sand 115 is sprayed toward the appropriate sand 115 on the conveyor 123 and sufficiently dried so that the appropriate sand 115 can be used as it is as an aggregate sand product.

  Aggregate sand or the like (hereinafter referred to as “fine sand”) 116 that has passed through both the sieves 111 and 112 is discharged into the tank 122a of the fine sand storage unit 122 via the fine sand hopper 119. Is done. One end of each of the sieves 111 and 112 is supported on the device case 110 by a vibration pin 113 so that the sieves 111 and 112 can be vibrated by a vibration device (not shown). A known vibration mechanism such as a crank method, a piston method, a vibration motor method, or the like can be applied to such a vibration device, and the vibration device is not particularly limited as long as it can reliably classify aggregate sand and the like. Absent.

  That is, since the classification device 5 is provided with the vibration sieve device 109 that can be classified in a plurality of stages, only the aggregate sand of a desired size can be obtained by a simple operation by changing the size of the sieve eyes of each stage. In addition to being able to separate the particles, even if they are fine sieves, they are vibrated, so that clogging is less likely to occur and the classification efficiency can be greatly improved.

Next, the drainage treatment apparatus 6 will be described with reference to FIG.
In the drainage treatment device 6, the liquid drainage device 4 or the classification device 5 is flowed down from the aggregate sand or the like by the compressed air from the air blowers 21 and 124 at the time of charging or during transportation. A drainage receptacle 127 that receives the drained water is disposed, and the drainage receptacle 127 communicates with the drainage tank 129 through a drainage channel 128.

  The drainage tank 129 is a sedimentation tank, and after sludge is precipitated and separated and discharged in the drainage tank 129, simple water treatment such as alkali neutralization is performed, and the supernatant is pumped to the main line 13 by the pump 17, By opening / closing the intervening valves 130, 131, 132, 133, the spray header 11 of the liquid addition device 7 and the primary cleaning device 3a of the liquid addition device 7 are routed through the pipelines 14, 15, 66, 16 respectively. The cleaning water is supplied to or stopped from the injection nozzle 27, the auxiliary injection nozzle 55, and the injection pipe 80 of the secondary cleaning device 3b.

Next, a vibration type cleaning device 134 that does not use a cavitation flow like the primary cleaning device 3a will be described with reference to FIG.
In the vibration type cleaning apparatus 134, a vibration cylinder 136 to which intense vibration is applied by a vibration apparatus (not shown) is obliquely arranged, and the aggregate sand 8 is placed near the upper portion of the upper end surface 136a of the vibration cylinder 136. A hopper 135 to be charged is provided, and the hopper 135 is positioned below the end of the conveyor 10 of the charging device 2 so that the aggregate sand 8 from the charging device 2 is charged into the vibrating cylinder 136. ing. An injection pipe 139 is provided near the lower end of the hopper 135 on the end surface 136 a so that cleaning water is supplied into the vibrating cylinder 136.

  Further, in the vibration cylinder 136, a plurality of protrusions 137 project from the inner wall toward the cylinder axis, and a zigzag space 141 is formed by the protrusions 137, and between the adjacent protrusions 137. A plurality of air nozzles 138 are provided, and compressed air from an air blower (not shown) is ejected from the air nozzles 138. A discharge pipe 140 is provided in the vicinity of the lower portion of the lower end surface 136b of the vibration cylinder 136, and cleaning and chamfering are performed via the discharge pipe 140 using cleaning water from the injection pipe 139 and air from the air nozzle 138. The processed aggregate sand 8 is discharged to the secondary cleaning device 3b.

  In such a configuration, the aggregate sand 8 introduced from the hopper 135 is vigorously shaken in the space 141 and is vigorously stirred by the air from the air nozzle 138. As a result, the aggregate sand 8 The protrusions 137 or the aggregate sand collide at high speed, and the corners and foreign matter of the aggregate sand 8 can be removed in the same manner as the primary cleaning device 3a. In addition, in this vibration type cleaning device 134, it is not necessary to generate a cavitation flow or transport the aggregate sand 8 over a long distance by the pressure fluid, and most of the impact force is given from the vibration of the vibration cylinder 136. Therefore, the pressure of the washing water and air used is lower than that of the primary washing device 3a, and no high quality is required for the washing water, and the low-quality waste water after the classification treatment is used as it is. Can be reused.

  That is, as the primary cleaning device, the vibration type cleaning device 134 capable of imparting severe vibration to the aggregate sand 8 is used, so that high-pressure cleaning water and air are not required, and expensive high-pressure pumps and piping are eliminated. Thus, the facility cost can be reduced, and the low-quality waste water after the classification treatment can be reused as washing water as it is, so that the waste water treatment cost can be further reduced and the environmental conservation by the closed system can be further promoted.

  In addition, when performing cleaning and chamfering treatment with a single device as in the past, unless the pipe is lengthened or the whole is enlarged, a high-quality aggregate sand product cannot be obtained, Although the cleaning apparatus had to be fixed, each apparatus can be reduced in size by dividing the processing apparatus into multiple stages as in the cleaning apparatus 3 according to the present invention. Is possible. Other devices constituting the aggregate sand washing classification system 1, for example, the charging device 2, the liquid draining device 4, the vibration sieving device 109, etc. are originally small and can be easily transferred. In the aggregate sand cleaning and classifying system 1 relating to the above, each constituent device can be made portable, and the aggregate sand 8 can be cleaned and classified regardless of the place, so that it is highly portable. A classification system can be provided.

  The present invention introduces a polishing agent, a cleaning agent, etc., and sprays a polishing solution, a cleaning solution, etc., which has become a cavitation flow, , By colliding with impacted objects such as machine parts, meteorites, jewelry and precious metal ornaments, and then throwing these impacted objects into a rotating drum and rolling them to polish and clean them. It can also be applied to uses such as.

1 is an overall configuration diagram of an aggregate sand cleaning classification system using a cleaning apparatus according to the present invention. It is side surface partial sectional drawing of the whole primary cleaning apparatus. It is side surface partial sectional drawing of the injection nozzle of a primary cleaning apparatus. It is side surface partial sectional drawing of the straight pipe | tube part of a primary cleaning apparatus. It is side surface partial sectional drawing of the whole secondary washing | cleaning apparatus. It is side surface partial sectional drawing of the rotating drum of a secondary washing | cleaning apparatus. It is side surface partial sectional drawing of the whole classification apparatus. It is side surface partial sectional drawing of the whole vibration type cleaning apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aggregate sand cleaning classification system 3 Cleaning device 3a Primary cleaning device 3b Secondary cleaning device 4 Liquid draining device 5 Classification device 6 Drainage processing device 7 Liquid adding device 8 Aggregate sand 27 Injection nozzle 31 Pipe line 33 slot 33
48 Gas pressurized to high pressure 49 Cavitation flow 50/71 Pressure fluid 54 Helical projection 55 Auxiliary injection nozzle 76 Rotating drum 77a / 78a Inner wall 79a Inlet 80a Injecting port 83 Helical feed blade 109 Vibrating sieve device

Claims (10)

  For an aggregate provided with a cleaning device for cleaning and chamfering the aggregate sand with a liquid, and a classification device for classifying the aggregate sand after the cleaning and chamfering processing according to size A sand cleaning classification system, wherein the cleaning device is provided with an injection nozzle capable of spraying a pressure fluid having a cavitation flow toward an aggregate sand flowing down from an input port into a pipeline. And a secondary cleaning device provided with a rotating drum capable of rolling the aggregate sand therein.   The jet nozzle is supplied with a liquid and a gas, at least one of which is pressurized to a high pressure, and surrounds the gas with a cavitation flow composed of a high-speed liquid and a gas such as a cavity generated in the liquid. The aggregate sand cleaning classification system according to claim 1, wherein the pressure fluid is configured as described above.   3. The aggregate sand washing classification system according to claim 1, wherein a spiral protrusion capable of guiding the pressure fluid in a spiral direction is provided on an inner wall of a pipe line of the primary cleaning device. .   An auxiliary injection nozzle capable of additionally spraying the pressure fluid to the aggregate sand being transferred by the pressure fluid from the injection nozzle is provided in the middle portion of the pipe line of the primary cleaning device. The aggregate sand washing classification system according to any one of claims 1 to 3.   A spiral feed blade is provided on the inner wall of the rotary drum so that the aggregate sand can transfer aggregate sand to the discharge side by the rotation of the rotary drum. The sand washing classification system for aggregates according to any one of claims 4 to 5.   An inlet for the aggregate sand transferred from the primary cleaning device is provided on the rotational axis of one end surface of the rotating drum, and the cleaning shaft is disposed on the rotational axis of the other end surface of the rotating drum. The aggregate sand cleaning classification system according to any one of claims 1 to 5, wherein an injection port for replenishing the liquid is disposed to face the introduction port.   7. The liquid sand washing and classification system for aggregate is provided with a liquid adding device for preliminarily infiltrating liquid into the sand for aggregate before washing and chamfering treatment. 8. The sand washing classification system for aggregates as described in the item.   8. The aggregate sand cleaning and classification system is provided with a liquid draining device for separating the liquid from the aggregate sand after washing and chamfering treatment. The aggregate sand cleaning classification system according to one item.   In the aggregate sand cleaning and classification system, a drainage treatment device that can reuse the drainage liquid after the classification treatment as the liquid is provided, and only the gas of the liquid and gas supplied to the pressure fluid is added to a high pressure. The aggregate sand cleaning classification system according to claim 2 or 3, wherein the system is configured to press. The aggregate sand washing classification system according to any one of claims 1 to 9, wherein the classification device is provided with a vibration sieving device capable of classification in a plurality of stages.

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