JP3466091B2 - Sand sampling machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an apparatus for removing impurities from sand in a sand sampling machine for collecting sand from soil or the like mined from a riverbed or the like. It is. 2. Description of the Related Art In a conventional sand sampling machine, a belt conveyor is disposed in a water tank so as to be inclined upward from below, and raw water flowing into the water tank at the lower end of the belt conveyor is placed on the belt conveyor. The settled sand is carried out of the water tank at the upper end of the belt conveyor. Conventionally, for example, in a sand sampling machine disclosed in Japanese Utility Model Laid-Open No. 3-54545, each suction sampling section is disposed on a vibrating device installed on a belt conveyor, and each suction sampling section is connected to a sand of the belt conveyor. It is movably supported so that it can approach and separate from the transport belt. Therefore, it is possible to maintain the position of the suction hole with respect to the sedimentary sand in an optimum state, and to efficiently collect the impurities mainly by efficiently sucking the impurities. However, since the movement of each of the suction and sampling sections is adjusted by an electric control means, in addition to the suction pipe, a driving mechanism for moving each of the suction and sampling sections, A drive control unit for controlling the drive mechanism based on a detection signal from the sand height detection means is required, and the structure for adjusting the movement of each suction and sampling unit has been complicated. An object of the present invention is to simplify the structure for adjusting the movement of each suction and sampling unit. The present invention will be described with reference to the reference numerals in the drawings (FIGS. 1 to 7) of the embodiments described later. Claim 1
The sand sampling machine according to the invention is configured as follows. [0007] A belt conveyor (2) is disposed in a water tank (1) at an angle from the lower side to the upper side of the belt conveyor (2). The sand (S) settled on the upper side is carried out of the water tank (1) at the upper end side of the belt conveyor (2). The belt conveyor (2) includes a suction sampling unit (11) movably supported so as to be able to approach and separate from the sand transport belt (5). This suction sampling part (1
In the case of 1), the settled sand (S) on the sand transport belt (5)
In addition to the suction hole (27) facing the surface, a pressure receiving portion (23) capable of contacting the sediment sand (S) is provided, and the suction and sampling is performed by the fluctuation of the pressure receiving portion (23) accompanying the fluctuation of the sediment sand (S). Department (1
1) can move together with the suction hole (27). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a sand sampling machine according to an embodiment of the present invention will be described with reference to the drawings. <Outline of sand sampling machine shown schematically in FIGS. 1 and 2>
Inside, a belt conveyor 2 is disposed so as to be inclined and extend from the lower rear side to the upper front side. In this belt conveyor 2, a sand transport belt 5 is wound around a lower end belt wheel 3 and an upper end belt wheel 4, and the upper belt 5 a of the sand transport belt 5 is moved from the rear lower end to the front upper end of the water tank 1. To the sand transport direction P (forward) toward the side. The upper belt 5a of the sand transport belt 5 is curved in a U-shape in a width direction Q perpendicular to the sand transport direction P (lateral direction perpendicular to the front-rear direction) except for the vicinity of the two belt wheels 3 and 4. are doing. A vibration device 6 for vibrating the upper belt 5a is provided in the middle of the belt conveyor 2. Sand S settled on the upper belt 5a of the sand transport belt 5 from the raw water flowing into the water tank 1 at the rear lower end side of the belt conveyor 2 (see also FIG. 5).
Is dropped from the upper belt 5a of the sand transport belt 5 at the front upper end side of the belt conveyor 2 and is carried out of the water tank 1. The vibrating device 6 is installed in a predetermined range of the upper belt 5a of the sand transport belt 5 in the front-rear direction including the sand transport direction P. In the vicinity of the vibrating device 6, an impurity removing device 7 described in detail later is installed. <Details of the Impurity Removing Apparatus 7> As shown in FIGS. 3, 4, and 5, the impurity removing apparatus 7 includes a discharge main pipe 8 described in detail *, a suction drive section 9, and a plurality of The apparatus includes a flexible discharge branch pipe 10 and a plurality of suction and sampling units 11. As shown in FIG. 3, the discharge main pipe 8 includes a support discharge pipe 12 extending in the width direction Q of the belt conveyor 2 and a left and right side of the support discharge pipe 12. The connected first branch drain 13 (13
a, 13b) and the second branch drain 14 (14a, 14b,
14c), the first branch 13 and the second branch 14
Are connected to a merging discharge pipe 15. The support discharge pipe 12 is connected to the first branch discharge pipe 13 and the second branch discharge pipe 14 by both left and right flange portions 16 and 17 so as to be rotatable around a center line 12 a (width direction Q) in the extending direction. I have. * Suction drive unit 9 As shown in FIG. 3, the suction drive unit 9 is provided with a suction pump 18 connected in the middle of the merged discharge pipe 15 of the discharge main pipe 8.
And an electric motor 19 for driving the suction pump 18. * Each of the flexible discharge branch pipes 10 Each connecting portion 20 is arranged side by side along the center line 12a (width direction Q) in the extending direction on the support discharge pipe 12 of the discharge main pipe 8. As shown in FIG. 4, each of the flexible discharge branch pipes 10 is connected to each of the connection portions 20 in a cantilever manner by a connection tube 21, and is extended toward the sand transport direction P of the belt conveyor 2. I have. Each of the flexible discharge branch pipes 10 is formed of hard rubber, and can be bent in a vertical direction (flexible direction). The supporting exhaust pipe 12 is rotated around the center line 12a (width direction Q) in the extending direction by the flange portions 16 and 17 with respect to the first branch exhaust pipe 13 and the second branch exhaust pipe 14 together with the connecting portions 20. When the belt is moved to adjust the position, as shown in FIG. 5, the upper belt 5a (belt conveyor 2) of the sand transport belt 5 is moved.
The inclination angle θ of each flexible discharge branch pipe 10 with respect to the sand transport direction P) can be changed. Each flexible discharge branch pipe 10 has a plurality of floats 10a.
Are connected to each other. * Each of the suction and sampling units 11 Each of the suction and collection units 11 is disposed above the upper belt 5a of the sand transport belt 5 on the vibration device 6, as shown in FIGS. As shown in FIG. 4, each of the suction and sampling sections 11 is arranged in the width direction Q of the sand transport belt 5 in correspondence with each of the flexible discharge branch pipes 10, and as shown in FIGS. 22 and a pressure receiving section 23. In each of the suction cylinders 22, a cylindrical suction port 24 is closed at both left and right end faces.
4 is connected to a cylindrical outlet 25. The discharge port 25 of each suction tube 22 is connected to each of the flexible discharge branch pipes 1.
0 (suction sampling unit support means) at the free end side
Are connected by Suction port 2 of each suction cylinder 22
In 4, the suction hole 27 extends in the width direction Q of the sand transport belt 5 in a band shape to the vicinity of the left and right end surfaces at the lower front side. Each of the pressure receiving portions 23 is attached to the suction port 24 of each of the suction cylinders 22 on the sand transport direction P side of the belt conveyor 2, and is attached to the left and right sides of the suction port 24 to convey the sand. Side plates 28, 29 extending toward the direction P and the lower end front portions of the left and right side plate portions 28, 29 are provided so as to extend from the lower front portions toward the sand transport direction P side. And a contact plate portion 30 provided. The lower end of the suction port 24 is located immediately above the contact plate 30 in the extending direction 30a,
Further, the suction hole 27 is located immediately above the lower end. The contact plate 30 is separated from the suction hole 27 in the sand transport direction P, and an upper suction passage 31 is provided on the contact plate 30 and between the left and right side plates 28 and 29 and the suction port 24. In addition, a lower suction passage 32 is provided between the contact plate 30 and the upper belt 5a of the sand transport belt 5. The upper and lower suction passages 31 and 32 and the suction hole 27 are provided between the rear end of the contact plate 30 and the suction hole 27.
Are provided with an open space 33 communicating with each other. The suction hole 27 faces the open space 33. The suction holes 27 in the suction cylinders 22 of the respective suction and sampling sections 11 extend along a plurality of specific width direction lines Q ₁ and Q ₂ along the width direction Q of the sand transport belt 5. The band-shaped relative movement area A formed by the suction holes 27 with respect to the upper belt 5a of the sand transport belt 5 is substantially the entirety of a predetermined area B extending from the center line C in the width direction Q of the sand transport belt 5 to both sides in the same width direction Q. including. <Operation of the impurity removing device 7> FIGS.
As shown in FIG.
The sand S that has settled is transported onto the vibration device 6. When the sedimentary sand S is vibrated on the vibrating device 6, the sedimentary sand S is collected on the side of the center line C in the width direction Q of the sand transport belt 5, and the particle intervals thereof become dense. The water content is very low. At this time, due to the difference in specific gravity of the settled sand S, the coarse sand S gathers in the lower part near the upper belt 5a, and the fine sand S gathers in the upper part. In this case, impurities (not shown) may accumulate on the fine sand S. These impurities are light and include various garbage in addition to pumice and lignite. As shown in FIGS.
When the contact plate portion 30 of the pressure receiving portion 23 comes in contact with the sedimentation sand S having the pile height H, the flexible discharge branch pipes 10 made of hard rubber are used.
Are supported in a cantilever manner by a contact fulcrum of the contact plate portion 30 against the sediment sand S and a connection fulcrum to the supporting exhaust pipe 12 while maintaining a weight balance with buoyancy by the float 10a. In the two-point support state, the distance between the suction port 24 of the suction cylinder 22 and the sedimentary sand S having the deposition height H in each suction sampling unit 11 is L. In this state, when the suction pump 18 is driven, the following suction function * works on each of the suction and sampling sections 11. * When a suction force is generated in the suction hole 27 at the suction port 24 of the suction tube 22, impurities or the like facing the lower suction passage 32 are transferred from the suction hole 27 to the suction port 24 through the open space 33.
Is sucked. In addition, impurities and the like floating in the upper suction passage 31 are also sucked into the suction port 24 from the suction hole 27 through the open space 33. The impurities and the like introduced into the suction port 24 are further discharged from the discharge port 25 of the suction tube 22 to the merged discharge pipe 15 via the flexible discharge branch pipe 10, the support discharge pipe 12, and the two branch discharge pipes 13, 14. Reach. Under such a suction action, the merging and discharging pipe 15
Are discharged and removed. These impurities and the like sometimes include fine sand S. for that reason,
The fine sand S from which the impurities have been removed is carried out to another classification device for effective use, or returned to the water tank 1 again for reprocessing. On the other hand, the settled sand S remaining on the upper belt 5a from which impurities and the like have been removed by the suction action is carried out from the belt conveyor 2. When the deposition height H of the sedimentation sand S fluctuates in the upper belt 5a, each of the flexible discharge branch pipes 1 made of hard rubber is used.
0 is bent, the pressure receiving section 23
The contact plate portion 30 also moves toward and away from the sediment sand S. At the time of this change, the suction port 24 of the suction cylinder 22 in each suction sampling unit 11 also follows, so that each suction port 2
The distance L between the sediment 4 and the sedimentary sand S of the pile height H does not change much and is kept almost constant. <Features of the present embodiment>
(Other than the other technical ideas described below). * Each suction sampling unit 11 was provided with a pressure receiving unit 23 capable of contacting the sediment sand S. Therefore, due to the fluctuation of the pressure receiving section 23 caused by the fluctuation of the sediment sand S, the suction and sampling section 11 can automatically move together with the suction hole 27. Therefore, unlike the prior art in which the movement of each suction and sampling unit is adjusted by the electric control means, the position of the suction hole 27 with respect to the sediment sand S is maintained in an optimum state by a simple movement adjustment structure, and impurities such as impurities are removed. Suction can be performed efficiently and impurities and the like can be reliably collected. * In the suction sampling section 11, the pressure receiving section 23
Is attached to the suction tube 22 on the sand transport direction P side of the belt conveyor 2 in the inclined state. Therefore, the upper belt 5a of the inclined sand transport belt 5 and the pressure receiving portion 23
And a suction passage 32 can be provided between them. Therefore,
Suction of impurities and the like can be performed more efficiently. * In the suction sampling section 11, the pressure receiving section 23
As described above, the contact plate 30 and the upper and lower suction passages 3
1 and 32 and an open space 33. Therefore, the suction of impurities and the like can be performed more efficiently by the above-described suction action. * The suction tube 22 of the suction sampling unit 11 is connected to the free end side of the flexible discharge branch pipe 10 connected to the discharge main pipe 8 in a cantilever manner. Therefore, the suction sampling unit 11 moves in the flexible direction of the flexible discharge branch pipe 10 with the change of the sediment sand S. Therefore, with a simple connection structure utilizing the flexibility of the flexible discharge branch pipe 10, the suction of impurities and the like can be performed smoothly, and the suction and sampling unit 11 is moved closer to the upper belt 5a of the sand transport belt 5. It can be moved so as to be separated. When the sediment sand S is vibrated by the upper belt 5a of the sand transport belt 5 by the vibrating device 6, the principle that impurities and the like are gathered upward by the difference in specific gravity of the sediment sand S is used to suck and collect the impurities and the like. The part 11 sucks and removes it. Therefore, impurities and the like can be reliably recovered. [Other Embodiments] In addition to the above-described embodiments, the present invention may be configured as indicated by * below. * Although not shown, in the pressure receiving part 23 of each suction and sampling part 11 of the above embodiment, the upper side facing the contact plate part 30 is also closed to form the upper suction passage 31. * Although not shown, each of the suction and sampling units 11 in the above embodiment may be disposed not only on the vibrating device 6 but also on the sand transport direction P side of the vibrating device 6 as described above. * Although not shown, in the impurity removing apparatus 7 of the above embodiment, the suction pump 18 is omitted and a siphon tube structure is adopted . According to the sand sampling machine of the first aspect of the present invention, the suction sampling section ( Since the predetermined pressure receiving part (23) is provided in 11), the structure for adjusting the movement of the suction and sampling part (11) can be simplified, and the position of the suction hole (27) with respect to the sediment sand (S) can be optimized. It is possible to efficiently suck impurities and the like while maintaining the state. [0046]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing a sand sampling machine according to the present embodiment. FIG. 2 is a schematic plan view showing a sand sampling machine according to the present embodiment. FIG. 3 is a partially enlarged right side view showing only the impurity removing device of FIGS. 1 and 2; FIG. 4 is a partially enlarged plan view showing only the impurity removing device of FIGS. 1 and 2; FIG. 5 is a partially enlarged front view showing only the impurity removing device of FIGS. 1 and 2; FIG. 6 is a cross-sectional view of only the suction and sampling section of the impurity removing device as viewed from the front. 7A is a plan view of FIG. 6, and FIG. 7B is a plan view of FIG.
FIG. 7C is a cross-sectional view taken along line XX of FIG. 6. [Description of Signs] 1 ... water tank, 2 ... belt conveyor, 5 ... sand transport belt, 6
... vibration device, 7 ... impurity removal device, 8 ... discharge main pipe, 10
... Flexible discharge branch pipe, 11 ... Suction sampling unit, 22 ... Suction cylinder, 2
3 ... Pressure receiving part, 27 ... Suction hole, 30 ... Contact plate part, 31,3
2: suction passage, 33: open space, P: sand transport direction, S:
Settling sand.

Claims (1)

(57) [Claims 1] A belt conveyor is disposed in an inclined manner in a water tank so as to extend from below to above, and settled on the belt conveyor from raw water flowing into the water tank at the lower end side of the belt conveyor. A sand sampling machine configured to carry sand out of a water tank at an upper end side of a belt conveyor, comprising: a suction sampling unit movably supported so as to be able to approach and separate from a sand conveyor belt of the belt conveyor. In addition to the suction holes facing the sedimentation sand on the sand transport belt, a pressure receiving part that can contact this sedimentation sand is provided, and the suction sampling part is sucked by the fluctuation of the pressure receiving part due to the fluctuation of the sedimentation sand A sand sampling machine characterized by being movable with a hole.