JP2005256334A - Sand gathering machine with classifier and classifier for suspended carbons - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To gather excellent product sand SE by removing suspended substances C and F such as suspended carbons from recovery sand E to be mixed in precipitated sand S. <P>SOLUTION: A sand gathering machine body 1 carries out the precipitated sand S precipitated on a belt conveyor 3 from raw water A flowing in a water tank 2 by the belt conveyor 3 in the water tank 2 from the water tank 2 by a drain port 8 of the belt conveyor 3. An overflow tank 10 has a main tank 14 for supplying residual raw water B left by the precipitation of the precipitated sand S, an overflow passage 16 for separating the suspended substance C suspended by the residual raw water B in the main tank 14, and a drain pipe 18 for draining primary treatment raw water D from the main tank 14. A negative pressure cyclone 11 has a main tank 20 for supplying the primary treatment raw water D from the drain pipe 18 of the overflow tank 10, a siphon pipe 25 for separating the suspended substance F suspended by the primary treatment raw water D in the main tank 20, and a drain pipe 23 for recovering the recovery sand E from the primary treatment raw water D in the main tank 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sand collecting machine provided with a classification device for separating floating substances such as floating carbons, and a classification device for separating floating carbons.

In the sand collecting machine according to Patent Document 1 below, a belt conveyor 2 is inclined in the water tank 1 and arranged from below to above, and on the belt conveyor 2 from raw water flowing into the water tank 1 on the lower end side of the belt conveyor 2. The sedimented sand S that has settled on is discharged from the water tank 1 as product sand at the discharge port on the upper end side of the belt conveyor 2. This product sand is used, for example, when placing concrete.
JP 2000-037637 A

  However, if the product sand (precipitated sand S) is rough, the fluidity becomes poor when a vibration is applied during the casting of the concrete, and nests are likely to be formed. Causes a drop. For this reason, generally, the precipitated sand S is mixed with recovered sand to form the product sand. It is effective to collect the recovered sand from the residual raw water remaining after the sedimentation sand S settles in the water tank 1, but the residual raw water often has floating substances such as floating carbon floating therein. The phenomenon that the color of the object adheres to the recovered sand and remains in the cast concrete was often observed particularly in the high fluidity concrete.

  An object of the present invention is to collect good product sand by removing suspended substances such as suspended carbon from recovered sand to be mixed with precipitated sand, for example. Another object of the present invention is to efficiently perform the work for mixing the recovered sand with the precipitated sand.

The present invention will be described with reference to the reference numerals of the drawings (FIG. 1) of the embodiment described later.
The sand collecting machine with a classification device according to the invention of claim 1 is configured as follows.
In the main body (1) of the sand collecting machine, the belt conveyor (3) is inclined in the water tank (2) and arranged from the lower side to the upper side, and the water tank (2) is disposed at the lower end side of the belt conveyor (3). Precipitated sand (S) precipitated on the belt conveyor (3) from the inflowing raw water (A) is carried out of the water tank (2) through the discharge port (8) on the upper end side of the belt conveyor (3). Recovered sand (E) recovered by separating floating carbons (C, F) from residual raw water (B) remaining after sedimented sand (S) in the water tank (2) is recovered from the belt conveyor (3). A classification device (9) for supplying to the settling sand (S) at the discharge port (8) is provided. Incidentally, the floating carbons (C, F) contain at least fine carbon as a main component.

  According to the first aspect of the present invention, the collected sand (E) with less adhesion of floating carbons (C, F) can be separated and recovered from the residual raw water (B) by the classifier (9) in the sand collecting machine. Further, since the collected sand (E) is automatically mixed with the precipitated sand (S) at the discharge port (8) of the belt conveyor (3), the working efficiency can be improved.

The sand collecting machine with a classification device according to the invention of claim 2 is configured as follows.
In the main body (1) of the sand collecting machine, the belt conveyor (3) is inclined in the water tank (2) and arranged from the lower side to the upper side, and the water tank (2) is disposed at the lower end side of the belt conveyor (3). Precipitated sand (S) precipitated on the belt conveyor (3) from the inflowing raw water (A) is carried out of the water tank (2) through the discharge port (8) on the upper end side of the belt conveyor (3). Primary classification device (10) for separating residual carbon (C) floating in the residual raw water (B) by supplying the residual raw water (B) left by the precipitation sand (S) in the water tank (2). Then, the primary treatment raw water (D) remaining after the floating carbons (C) are separated by the primary classifier (10) is supplied, and the floating carbons (F) floating in the primary treatment raw water (D) are separated. And a secondary classifier (11) for recovering the recovered sand (E) from the primary treated raw water (D).

  In the second aspect of the invention, since the sand collecting machine separates and recovers the recovered sand (E) from the residual raw water (B) in the primary classifier (10) and the secondary classifier (11) in the sand collector, the recovery The floating carbons (C, F) can be reliably removed from the sand (E). Incidentally, as in the invention of claim 5, the recovered sand (E) may be automatically mixed with the precipitated sand (S) at the discharge port (8) of the belt conveyor (3). The recovered sand (E) may be recovered separately and mixed with each other at a place other than the discharge port (8).

The sand collecting machine with a classification device according to the invention of claim 3 is configured as follows.
In the main body (1) of the sand collecting machine, the belt conveyor (3) is inclined in the water tank (2) and arranged from the lower side to the upper side, and the water tank (2) is disposed at the lower end side of the belt conveyor (3). Precipitated sand (S) precipitated on the belt conveyor (3) from the inflowing raw water (A) is carried out of the water tank (2) through the discharge port (8) on the upper end side of the belt conveyor (3). The following overflow tank (10) and cyclone (11) are attached to the main body (1). In this overflow tank (10), a main tank (14) to which residual raw water (B) left by sedimentation sand (S) in the water tank (2) is supplied, and a main tank (14) It has an overflow path (16) for separating the suspended matter (C) floating in the residual raw water (B), and a discharge path (18) for discharging the primary treated raw water (D) from the main tank (14). . In this cyclone (11), the main tank (20) to which the primary treated raw water (D) is supplied from the discharge path (18) of the overflow tank (10), and the primary treated raw water in the main tank (20) ( An overflow path (25) for separating the floating substance (F) floating in D) and a discharge path (23) for recovering the recovered sand (E) from the primary treated raw water (D) in the main tank (20). Have.

  In the third aspect of the invention, since the recovered sand (E) is separated and recovered from the residual raw water (B) in the sand collecting machine in the overflow tank (10) and the cyclone (11), the recovered sand (E) Floating matter (C, F) can be reliably removed from. Incidentally, as in the invention of claim 5, the recovered sand (E) may be automatically mixed with the precipitated sand (S) at the discharge port (8) of the belt conveyor (3). The recovered sand (E) may be recovered separately and mixed with each other at a place other than the discharge port (8).

  In the invention of claim 4 based on the invention of claim 3, the overflow path of the cyclone (11) is a siphon pipe (25) capable of adjusting air supply. In the invention of claim 4, the suspended matter (C, F) can be reliably removed from the recovered sand (E) by the cyclone (11) having the siphon tube (25) capable of adjusting air supply.

  In the invention of claim 5 based on the invention of claim 2 or claim 3 or claim 4, the recovered sand (E) is collected at the discharge port (8) of the belt conveyor (3). To (S). In the invention of claim 5, since the recovered sand (E) is automatically mixed with the precipitated sand (S) at the discharge port (8) of the belt conveyor (3), the working efficiency can be improved.

  The floating carbon classifier (9) according to the invention of claim 6 includes the following overflow tank (10) and cyclone (11). The overflow tank (10) separates the main tank (14) to which the raw water to be treated (B) is supplied and the floating carbons (C) floating in the raw water to be treated (B) in the main tank (14). And an overflow path (16) for discharging the primary treated raw water (D) from the main tank (14). The cyclone (11) includes a main tank (20) to which primary treated raw water (D) is supplied from a discharge path (18) of the overflow tank (10), and primary treated raw water (D) in the main tank (20). ), And the recovered sand (E) from the primary treated raw water (D) in the main tank (20). And a discharge passage (23) for recovery.

  In the floating carbon classifier (9), the raw water to be treated (B) is divided into an overflow tank (10) and a cyclone (11) having a siphon tube (25) capable of adjusting air supply. Since the recovered sand (E) is separated and recovered from the recovered sand (E), the floating carbons (C, F) can be reliably removed from the recovered sand (E).

  In the present invention, good product sand (SE) can be collected by removing suspended substances (C, F) such as suspended carbon from recovered sand (E) to be mixed with precipitated sand (S), for example. In addition, the work for mixing the recovered sand (E) with the precipitated sand (S) can be performed efficiently. In addition, the amount of drainage can be reduced by the amount of the collected sand (E).

Hereinafter, a sand collecting machine with a classification device for floating carbons according to an embodiment of the present invention will be described with reference to FIG.
In the main body 1 of the sand collecting machine, a belt conveyor 3 is inclined in the water tank 2 from the lower rear side to the upper front side. In the belt conveyor 3, a sand transport belt 6 is wound between a lower end side belt wheel 4 and an upper end side belt wheel 5, and the upper belt 6 a of the sand transport belt 6 is moved from the rear lower end side of the water tank 2 to the front upper end. Rotate toward the sand transport direction P (forward) toward the side. The upper belt 6a of the sand transport belt 6 is curved in a U shape in the width direction perpendicular to the sand transport direction P (the left-right direction perpendicular to the front-rear direction) except for the vicinity of the belt wheels 4 and 5. ing. Precipitated sand S precipitated on the upper belt 6a of the sand transport belt 6 from the raw water A flowing into the water tank 2 from the raw water supply port 7 at the rear lower end side of the belt conveyor 3 is a sand discharge port 8 on the front upper end side of the belt conveyor 3. Then, it falls from the upper belt 6a of the sand transport belt 6 and is carried out of the water tank 2.

A classifier 9 for floating carbons attached to the main body 1 of the sand collecting machine includes an overflow tank 10 (primary classifier) and a negative pressure cyclone 11 (secondary classifier).
In the overflow tank 10, the residual raw water B (treated raw water) remaining after the settling sand S has settled in the water tank 2 is left in the main tank 14 through the residual raw water discharge port 12 through the residual raw water supply pipe 13 (supply path). It is supplied to the supply port 15. A part of the suspended matter C including floating carbon floating in the residual raw water B in the main tank 14 is discharged from the overflow passage 16 as drainage and separated from the residual raw water B. The primary treated raw water D remaining after the floating material C is separated from the residual raw water B is discharged from the primary treated raw water discharge port 17 of the main tank 14 to the primary treated raw water discharge pipe 18 (discharge path).

  Incidentally, the residual raw water B has a particle size range of 5 mm to 0 mm (mainly 0.15 mm to 0 mm), a true specific gravity range of 1.1 to 0.1 for carbons, and 2.4 to 2.7 for stone powder. It is. As for suspended matter C (carbons), the particle size range is 0.074 mm to 0 mm, and the true specific gravity range is 1.1 to 0.1. The primary treated raw water D has a particle size range of 5 mm to 0 mm (mainly 0.15 mm to 0 mm), a true specific gravity range of 1.1 to 0.1 for carbons, and 2.4 to 2.7 for stone powder. is there.

  In the negative pressure cyclone 11, the primary treated raw water D discharged to the primary treated raw water discharge pipe 18 of the overflow tank 10 is supplied to the primary treated raw water supply port 21 of the main tank 20 by the pump 19. In the main tank 20, centrifugal force acts on the primary treated raw water D, and the recovered sand E separated from the primary treated raw water D descends, and the underflow adjusting valve 22 opens according to the degree of vacuum in the main tank 20. The recovered sand E is recovered to the recovered sand discharge pipe 23 (discharge path). On the other hand, the siphon tube 25 (overflow path) that can be adjusted for air supply by the air supply adjusting means 24 including an electromagnetic air valve, a stop valve, etc., is adjusted in advance before starting operation and has an appropriate vacuum pressure. Optimal classification is performed in the main tank 20, and a part of the floating substance F including floating carbon floating in the primary treatment raw water D in the main tank 20 is discharged as drainage from the discharge port 26 of the siphon tube 25. . Further, when a vacuum pressure higher than a certain level is generated in the primary treated raw water discharge pipe 18, the vacuum relief valve 27 is opened and sufficient air flows in, so that an abnormal vacuum pressure is prevented from being generated. The collected sand E collected in the collected sand discharge pipe 23 is mixed with the precipitated sand S at the sand discharge port 8 of the sand collector main body 1, and the product sand SE is discharged from the sand discharge port 8.

  By the way, for the suspended matter F, the particle size range is 0.15 mm to 0 mm (mainly 0.075 mm to 0 mm), the true specific gravity range is 1.1 to 0.1 for carbons, and 2.4 to 2 for stone powder. .7. The recovered sand E has a particle size range of 5 mm to 0 mm (mainly 0.15 mm to 0 mm) and a true specific gravity range of 2.4 to 2.7. The product sand SE has a particle size range of 5 mm to 0 mm and a true specific gravity range of 2.4 to 2.7.

It is a system diagram concerning this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sand collector main body, 2 ... Water tank, 3 ... Belt conveyor, 8 ... Sand discharge port, 9 ... Classifier for floating carbons, 10 ... Overflow tank (primary classifier), 11 ... Negative pressure cyclone (secondary classifier) Apparatus), 14 ... main tank, 16 ... overflow path, 18 ... primary treatment raw water discharge pipe (discharge path), 20 ... main tank, 23 ... recovered sand discharge pipe (discharge path), 25 ... siphon pipe (overflow path), A: Raw water, B: Residual raw water (processed raw water), C: Floating matter, D: Primary treated raw water, E ... Collected sand, F ... Floating matter, S ... Precipitated sand, SE ... Product sand.

Claims (6)

The belt conveyor is tilted in the water tank and arranged from the bottom to the top, and the sediment sand that has settled on the belt conveyor from the raw water flowing into the water tank at the lower end side of the belt conveyor is removed from the water tank at the discharge port on the upper end side of the belt conveyor. In the sand collecting machine to be carried out, the recovered sand collected by separating the suspended carbon from the residual raw water remaining after the precipitated sand settled in the water tank is supplied to the precipitated sand through the discharge port of the belt conveyor. A sand collecting machine with a classification device, characterized by comprising a classification device. The belt conveyor is tilted in the water tank and arranged from the bottom to the top, and the sediment sand that has settled on the belt conveyor from the raw water flowing into the water tank at the lower end side of the belt conveyor is removed from the water tank at the discharge port on the upper end side of the belt conveyor. In the sand collecting machine to be carried out, a primary classifier for separating residual carbon from the residual raw water supplied from the settled sand in the water tank and floating in the residual raw water, and a floating in the primary classifier The primary treatment raw water remaining after separation of carbons is supplied, and a secondary classification device is provided that separates floating carbons floating in the primary treatment raw water and collects recovered sand from the primary treatment raw water. Sand collecting machine with classification device. The belt conveyor is tilted in the water tank and arranged from the bottom to the top, and the sediment sand that has settled on the belt conveyor from the raw water flowing into the water tank at the lower end side of the belt conveyor is removed from the water tank at the discharge port on the upper end side of the belt conveyor. In the sand collecting machine that is supposed to be carried out,
A main tank to which residual raw water remaining after sedimentation sand settled in the water tank is supplied, an overflow path for separating floating substances floating in the residual raw water in the main tank, and primary treated raw water is discharged from the main tank. An overflow tank having a discharge path;
The main tank to which the primary treated raw water is supplied from the discharge path of the overflow tank, the overflow path for separating floating substances floating in the primary treated raw water in the main tank, and the recovered sand from the primary treated raw water in the main tank A sand collecting machine with a classification device, characterized by comprising a cyclone having a discharge passage for collection. The sand collecting machine with a classification device according to claim 3, wherein the overflow path of the cyclone is a siphon tube capable of adjusting air supply. 5. The sand collecting machine with a classification device according to claim 2, 3 or 4, wherein the collected sand is supplied to the sedimented sand at an outlet of the belt conveyor. An overflow tank having a main tank to which raw water to be treated is supplied, an overflow path for separating floating carbons floating in the raw water to be treated in the main tank, and a discharge path for discharging primary treated raw water from the main tank; ,
The main tank to which the primary treated raw water is supplied from the discharge path of the overflow tank, the overflow path that is a siphon tube with adjustable air supply that separates floating carbons floating in the primary treated raw water in the main tank, and the main tank A classifier for floating carbons, comprising: a cyclone having a discharge path for collecting collected sand from primary treated raw water in a tank.

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