JP5948159B2 - Impurity removal device for sand collector - Google Patents

Description

The present invention, in the sand harvester for collecting sand from mined from the river bottom or the like gravel or the like, it relates that equipment to remove impurities from the sand.

  Conventionally, in the sand collecting machine disclosed in Patent Document 1 below, a belt conveyor is inclined and arranged from below to above in the water tank, and settles on the belt conveyor from raw water flowing into the water tank at the lower end side of this belt conveyor. The sand is carried out of the water tank on the upper end side of the belt conveyor. At this time, impurities can be removed from the sedimented sand on the belt conveyor by a suction sampling unit disposed on a vibration device installed on the belt conveyor.

JP 2000-37637 A

  Among impurities, for example, plastic materials such as wood chips and vinyl, pumice, and the like having a certain volume can be removed from the precipitated sand because they are separated from the precipitated sand and easily float on the water surface in the water tank. However, in the area where the belt conveyor is exposed upward from the surface of the water, fine impurities are not separated from the settling sand, but remain mixed in the settling sand and hardly float on the water surface in the water tank. It is easy to carry out from a water tank with sedimentation sand. In particular, decontamination of radioactivity has become a big problem nowadays.

This invention aims to provide a can be Ru equipment also fine impurities in the sand harvester removed from the precipitated sand.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 and 2) of the embodiments described later .

In the impurity removing device of the sand collecting machine according to the invention of claim 1 , the belt conveyor (2) is inclined in the water tank (1) and arranged from below to above, and at the lower end side of the belt conveyor (2). In a sand collecting machine in which sand (S) precipitated on the belt conveyor (2) from raw water flowing into the water tank (1) is carried out from the water tank (1) on the upper end side of the belt conveyor (2), ) In the region (P) where the belt conveyor (2) is exposed upward from the water surface (W) in the water tank (1) in cooperation with the belt conveyor (2). ) And a stirring device (7) having a stirrer (10) that stirs the sedimentary sand (S), and the transport device. (7) is a belt conveyor ( ) Having a blade (10) spirally provided with respect to the rotation center (9a) extending along the sand conveyance direction (X) as the conveyance body and the stirring body, and by means of the blade (10), a belt conveyor ( 2) In cooperation with the belt conveyor (2), the precipitated sand (S) is conveyed to the sand unloading side of the water tank (1) and stirred, and the belt conveyor (2) is directed to the sand conveying direction (X). A sand conveyor belt (5) having a bottom (6c) curved so as to swell downward in the crossing width direction (Y) is provided from the lower end side to the upper end side of the belt conveyor (2), and the blade (10) rotates. The trajectory is from the open end (6b) connecting both side edges (6a) in the width direction (Y) of the sand transport belt (5) toward the bottom (6c) of the sand transport belt (5). In the sand transport zone (T) .

In the invention of claim 1 , in the region (P) where the belt conveyor (2) is exposed upward from the water surface (W) in the aquarium (1), the sedimentary sand (S) mixed with fine impurities is agitated ( 7) When stirring according to 7), fine impurities can be separated from the precipitated sand (S) and suspended on the water surface (W) in the water tank (1), and the precipitated sand (S) from which the fine impurities have been separated is conveyed. Since the device (7) can be transported to the sand unloading side of the water tank (1) in cooperation with the belt conveyor (2), fine impurities can also be removed from the sedimented sand (S), and the radioactive It is also very useful for decontamination. Moreover, since the conveying device (7) also serves as the stirring device, the number of parts of the impurity removing device can be reduced and the structure can be simplified. Furthermore, the settling sand (S) on the belt conveyor (2) can be smoothly stirred and conveyed by the blades (10) of the conveying device (7).

In the invention of claim 2 that assumes the invention of claim 1, suction port for recovering floating impurities in the water to separate (W) from the conveying device with the agitation by (7) precipitation sand (S) (11a) is juxtaposed to the transport device (7) on the opposite side to the sand transport direction (X). In the invention of claim 6, the impurities separated from the sedimented sand (S) by the transfer device (7) and suspended on the water surface (W) can be easily recovered by the suction port (11a).

In invention of Claim 3 premised on invention of Claim 1 or 2 , in the said conveying apparatus (7), the jet outlet (14) which spouts flowing water facing the sand conveyance direction (X) of a belt conveyor (2). ). In the invention of claim 7, since a water flow facing the sand transport direction (X) is generated in the transport device (7), fine impurities are separated from the precipitated sand (S) and the water surface (W) in the water tank (1). Easy to float on.

  The present invention can provide a method and apparatus for removing fine impurities from precipitated sand (S) in a sand collector.

(A) is a front view which shows roughly the whole sand extractor provided with the impurity removal apparatus, (b) is a top view similarly. (A) is the elements on larger scale of FIG. 1 (a) which shows an impurity removal apparatus, (b) is the elements on larger scale of FIG.1 (b) which shows an impurity removal apparatus, (c) is FIG. It is a partial expanded sectional view in the AA line of).

Hereinafter, an impurity removal method and an impurity removal apparatus for a sand collector according to an embodiment of the present invention will be described with reference to the drawings.
In a water tank 1 shown in FIGS. 1 (a) and 1 (b), a belt conveyor 2 is inclined and disposed from the rear side to the front side. In the belt conveyor 2, a sand conveyance belt 5 is wound between the lower belt wheel 3 and the upper belt wheel 4, and the upper belt 6 of the sand conveyance belt 5 shown in FIG. Rotate in the sand transport direction X (forward) from the side toward the front upper end side (sand unloading side). The upper belt 6 of the sand transport belt 5 is in the width direction Y (the left-right direction perpendicular to the front-rear direction along the sand transport direction X) perpendicular to the sand transport direction X except for the vicinity of the upper and lower belt wheels 3 and 4. Curved in a U shape so as to swell downward, as shown in FIG. 2C, a sand conveyance area T is provided from an opening end 6b connecting both side edges 6a in the width direction Y toward the bottom 6c. The water surface W in the water tank 1 is kept constant by the overflow surface. The belt conveyor 2 is exposed upward from the water surface W in the water tank 1 in the vicinity of the front upper end side.

  In a region P where the belt conveyor 2 is exposed upward from the water surface W in the water tank 1, a conveying device 7 shown in FIGS. 2 (a), (b) and (c) is also provided as a stirring device. In the conveying device 7, a rotating shaft 9 rotated by a motor 8 extends along the sand conveying direction X of the belt conveyor 2, and a blade 10 (conveying body, agitating body) spirals around a rotation center 9a on the outer periphery of the rotating shaft 9. It extends continuously in a shape. The rotation trajectory of the blade 10 enters the sand transport zone T of the upper belt 6 of the sand transport belt 5 and is close to the bottom 6c. A rear lower half portion of the blade 10 in the direction of the rotation center 9 a is immersed under the water surface W in the water tank 1.

  A suction box 11 having a suction port 11a is arranged in parallel on the opposite side of the transport device 7 with respect to the sand transport direction X. The suction port 11 a is opened toward the blade 10 of the transport device 7 in the vicinity of the water surface W in the water tank 1. A suction pump 13 is connected to the suction box 11 by a discharge pipe 12. A jet pipe 14 (jet port) that jets running water facing the sand transport direction X is disposed above, in front, and behind the blades 10 of the transport device 7. A vibration device 15 that vibrates the upper belt 6 is installed below the suction box 11 and the blades 10 of the transport device 7.

Next, the impurity removal action will be described.
Sand S which has settled on the upper belt 6 of the sand transport belt 5 from the raw water introduced into the rear side of the water tank 1 falls from the upper belt 6 on the front upper end side of the belt conveyor 2 and is carried out of the water tank 1. Since vibration is applied to the upper belt 6 of the sand transport belt 5 by the vibration device 15, impurities such as plastic materials such as wood chips and vinyl, pumice, and mud float on the sand S precipitated on the upper belt 6. When the water filled in the suction box 11 is sucked by the discharge pipe 12 by the suction pump 13, a water flow is generated in the suction box 11, so that impurities on the sand S are passed through the suction port 11a to the suction box 11 by the water flow. It is sucked and discharged from the discharge pipe 12.

  In the region P where the belt conveyor 2 is exposed upward from the water surface W in the water tank 1 when the sand S precipitated from the raw water on the belt conveyor 2 is unloaded from the water tank 1 on the front upper end side of the belt conveyor 2, the upper belt 6 is transported to the sand unloading side of the water tank 1 in cooperation with the belt conveyor 2 by the blade 10 of the transport device 7 and the sand 10 on the upper belt 6 is transported by the blade 10 of the transport device 7. Stirring is performed from below the water surface W to above the water surface W, and the impurities separated from the sediment sand S and suspended on the water surface W along with the stirring are collected from the suction port 11a of the suction box 11.

This embodiment has the following effects.
(1) In the region P where the upper belt 6 of the sand transport belt 5 in the belt conveyor 2 is exposed upward from the water surface W in the water tank 1, the sediment sand S mixed with fine impurities is When stirring over the water surface W from below W, fine impurities can be separated from the precipitated sand S and suspended on the water surface W in the water tank 1, and the precipitated sand S from which the fine impurities have been separated is transported by the blades of the conveying device 7. 10 can cooperate with the sand conveyance belt 5 of the belt conveyor 2 to convey to the sand unloading side of the water tank 1. Therefore, fine impurities can be removed from the sedimented sand S, which is very useful for radioactive decontamination.

(2) Since the conveying device 7 simultaneously performs the stirring and conveyance of the sediment sand S on the upper belt 6 by the blades 10, it is easy to separate fine impurities from the sediment sand S.
(3) Since the conveying device 7 also serves as a stirring device, the number of parts of the impurity removing device can be reduced and the structure can be simplified.

(4) Impurities separated from the sedimented sand S by the transport device 7 and floating on the water surface W can be easily recovered by the suction port 11a of the suction box 11.
(5) Since the flowing water ejected from the ejection pipe 14 generates a water flow facing the sand transport direction X in the transport device 7, it is easy to separate fine impurities from the sediment sand S and to float on the water surface W in the water tank 1.

For example, the following embodiment may be configured as follows.
A stirrer such as a stirring blade that stirs the sedimented sand S is provided in addition to the transport device 7 without using the transport device 7 also as a stirrer.

Stirring can be performed only under the water surface W, or from below the water surface W to the water surface W, or only on the water surface W.
-About the form of the blade | wing 10 in the conveying apparatus 7, if the sedimentation sand S can be conveyed to the sand unloading side of the water tank 1 in cooperation with the belt conveyor 2, the blade | wing 10 will be made into the rotation center 9a on the outer periphery of the rotating shaft 9. On the other hand, it is not necessary to continuously extend in a spiral shape, and a plurality of blades may be arranged intermittently and a spiral conveyance path may be provided by each blade.

  DESCRIPTION OF SYMBOLS 1 ... Water tank, 2 ... Belt conveyor, 5 ... Sand conveyance belt, 6 ... Upper belt, 6a ... Side edge part, 6b ... Open end, 6c ... Bottom part, 7 ... Conveyance apparatus (stirring apparatus), 9a ... Center of rotation, 10 DESCRIPTION OF SYMBOLS ... Blade | wing, 11a ... Suction port, 14 ... Jet pipe (jet outlet), S ... Precipitation sand, W ... Water surface, P ... Area | region, X ... Sand conveyance direction, Y ... Width direction, T ... Sand conveyance area.

Claims (3)

The belt conveyor is inclined in the water tank and arranged from the lower side to the upper side so that the sand precipitated on the belt conveyor from the raw water flowing into the water tank at the lower end side of the belt conveyor is discharged from the water tank at the upper end side of the belt conveyor In the sand collecting machine, in the region where the belt conveyor is exposed upward from the water surface in the water tank, a transport device having a transport body for transporting the sedimented sand on the belt conveyor to the sand transport side of the water tank in cooperation with the belt conveyor; And a stirrer having a stirrer for stirring the precipitated sand ,
The conveying device also has the blades provided spirally with respect to the rotation center extending along the sand conveying direction of the belt conveyor as the conveying member and the stirring member, which also serves as the stirring device. In combination with the belt conveyor, the settling sand on the conveyor is transported to the sand delivery side of the water tank and stirred.
The belt conveyor includes a sand conveying belt having a bottom curved to swell downward in the width direction intersecting with the sand conveying direction from the lower end side to the upper end side of the belt conveyor, and the rotation trajectory of the blades An impurity removing apparatus for a sand collecting machine, wherein the impurity removing device enters a sand transport area of the sand transport belt from an opening end connecting both side edges in the width direction toward a bottom of the sand transport belt . To claim 1, characterized in that juxtaposed to the conveying device in opposite side suction port for collecting the impurities floating on the water surface to separate from the precipitated sand with the stirring by the transport device for the sand conveying direction Impurity removing device for the sand collecting machine described. 3. The impurity removing apparatus for sand collector according to claim 1, wherein a jet port for jetting running water is disposed opposite to the sand conveyor direction of the belt conveyor.