JPH0395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a fine sand collecting device for collecting fine sand from earth and sand mined from a riverbed or the like.

(Prior art) Conventionally, this type of fine sand sampling device was
There is one disclosed in No. 56054. As shown in FIG. 13, this fine sand sampling device has a belt support 72 with a U-shaped cross section extending parallel to the bottom wall 71 above the inclined bottom wall 71 of the settling tank 70. A belt conveyor 73 extending in the length direction of the fine sand sampling device is provided on the belt receiver 72,
The structure is such that the settled sand T is conveyed by a belt 74 running on this belt conveyor 73. Then, the settled sand T conveyed on the belt 74 is subjected to vibration by a vibrating body 75 to dehydrate it,
Further, a fountain is ejected from the nozzle 76 in the opposite direction to the traveling direction of the belt 74 to agitate the settled sand T on the belt 74 and flow it to the absorber 77 side, thereby removing impurities contained in the settled sand T into the absorber 77. inhale,
The structure is such that fine sand with high purity can be obtained by removing impurities.

However, when the precipitated sand is stirred by the fountain from the nozzle 76, a small amount of fine sand is also sucked into the absorber 77 along with impurities and then discarded. Therefore, there is waste in collecting fine sand, which is the original purpose, and there is a problem in terms of collection efficiency.

(Problems to be Solved by the Invention) As mentioned above, this invention aims to solve the problem that there is waste in collecting fine sand, and its purpose is to collect pumice, soft stone, garbage, soil, It is an object of the present invention to provide a fine sand collecting device that can reliably remove impurities such as mica and lignite, and can efficiently collect fine sand.

Structure of the invention (means for solving the problems) In order to solve the above-mentioned problems, this invention
As shown in FIG. 1, in the water tank 1, suction means 40, 4 suck the turbid water generated when impurities are separated from the fine sand S conveyed by the belt 6.
8, 58, and this suction means 40,
A sieve body 1 for removing impurities in the turbid water sent from 48 and 58 and allowing the turbid water and the fine sand S contained therein to pass through and flow into the water tank 1 again.
8.

(Function) By employing the above-described means, the present invention has the suction means 40, 48, 58 in the sieve body 18.
After the impurities in the turbid water sent from the
The turbid water flows into the water tank 1 through the screen 21 of the sieve body 18 together with the fine sand S contained therein, and joins with the earth and sand water supplied from the input pool 17.

(Example) Hereinafter, a first example of the present invention will be described in detail with reference to FIGS. 1 to 10.

As shown in Fig. 1, the water tank 1 of the fine sand sampling device B consists of a fine sand settling chamber 2 in the upper part and a belt conveyor storage chamber 3 in the lower part.
A tail portion 4 that communicates with the lower rear end of the fine sand settling chamber 2 projects from the rear end. A belt conveyor 5 is disposed in the belt conveyor storage chamber 3 in an inclined manner from the tail portion 4 to the upper front end thereof. A belt 6 is stretched between a tail roller 7 at the rear end of the belt conveyor 5 and a drive roller 8 at the front end, and the front end of the lower belt 6b of the belt 6 is slightly loosened by a pair of guide rollers 9 and 10. You are advised to do so.

As shown in FIG. 4, bottom plates 11 that slope downward are provided on both left and right sides of the bottom of the fine sand settling chamber 2.
On the side edges of the bottom plate 11, both side edges of the upper belt 6a of the belt 6 are slidably held by a support portion 12. The upper belt 6a of the belt 6 is used to partition the fine sand settling chamber 2 and the belt conveyor storage chamber 3 in the water tank 1. Furthermore, as shown in FIG. 1, a rubber seal plate 13 that contacts the upper belt 6a is provided at the lower rear end of the fine sand settling chamber 2 of the water tank 1. The tail portion 4 is separated from the tail portion 4.

In particular, as shown in FIG.
A receiving metal fitting 14 is provided between a and 6b at a position corresponding to the rear end to the front end of the bottom of the fine sand settling chamber 2, and the upper belt is connected to the upper belt by a curved plate 14a arranged in parallel in the front and back direction on the upper surface of the receiving metal fitting 14. 6a is held and curved to have a concave cross section.

Further, as shown in FIG. 8, an arm 15 protruding from the rear end of this receiving fitting 14 to both left and right sides is exposed to the outside of the water tank 1. is installed. Then, the vibration of this vibrating body 16 is transmitted to the receiving metal fitting 1 via the arm 15.
4, and is further transmitted to the curved plate 14 of the receiving metal fitting 14.
The upper belt 6a is configured to vibrate via the upper belt 6a.

A charging pool 1 is located at the upper rear end of the fine sand settling chamber 2.
7 is provided, and the earth and sand water flowing in from this input pool 17 is supplied toward a position corresponding to the rear end of the receiving metal fitting 14 of the upper belt 6a. In addition, in the front interior of the input pool 17 of the fine sand settling chamber 2, a truncated cone-shaped sieve body 18 whose diameter becomes larger toward the rear is provided.
is rotatably provided, and furthermore, a pair of baffle plates P for blocking the flow of earth and water are arranged below the sieve body 18 in parallel in the front-rear direction. The sieve body 18 is the sixth
As shown in the figure, a screen 21 made of metal mesh is attached to a frame 20 formed by assembling metal frame pieces 19, and a rotating shaft 18a passing through the center is connected to a motor (not shown). The two motors are connected to each other and rotated by the same motor.

An overflow channel 22 is provided at the left and right upper end edges of the rear part of the fine sand settling chamber 2 (only one is shown in FIG. 1), and the water surface W of the sand water in the fine sand settling chamber 2 is raised to a predetermined height or higher. When rising, this earth and sand water flows out into the overflow channel 22. The front end of the belt conveyor 5 is exposed from the water surface W of the earth and sand, and a discharge port 23 is provided below the front end drive roller 8.

An overflow discharge chamber 24 communicating with the overflow channel 22 is provided on the outside of the upper rear end of the fine sand settling chamber 2, so that overflow water flowing along the sloping bottom 22a formed in the overflow channel 22 is collected here. It's summery. A tank 25 is provided adjacent to and adjacent to the rear outside of the overflow discharge chamber 24 and is communicated with the overflow discharge chamber 24 through an opening 26 , and overflow water flows from the overflow discharge chamber 24 to the tank 25 through the opening 26 . It's flowing. A pump 27 is installed in the tank 25 so that overflowing water in the tank 25 is sucked into the pump 27. As shown in FIG. 5, a discharge pipe 28 in which an air vent 29 is installed is connected to the pump 27.
Overflow water flowing in from the pump 27 is forced into this discharge pipe 28.

Further, in front of the tail roller 7 of the belt conveyor 5, a discharge pipe 30 is provided between the upper and lower belts 6a, 6b, and a branch pipe 31 is provided with respect to the discharge pipe 28.
are connected via a flow control valve 32. The overflowing water forced into the discharge pipe 28 is guided into the spout pipe 30 via the branch pipe 31, and then is spouted to the tail roller 7.

As shown in FIG. 7, a jet pipe 33 is attached to a drain port 4a provided at the lower end of the tail portion 4 of the belt conveyor storage chamber 3, and a return port 34 formed on the fine sand settling chamber 2 is attached to the drain port 4a provided at the lower end of the tail portion 4 of the belt conveyor storage chamber 3. (FIG. 2), a circulation pipe 35 is connected via this jet pipe 33. This jet pipe 33 has a pair of outer cylinders 3 fixed to each other apart from each other in the water drain port 4a.
6 and 37, and a nozzle pipe 38 through which overflow water is pumped from the discharge pipe 28 is fitted into one outer cylinder 36, and a nozzle pipe 38 coaxial with this nozzle pipe 38 is fitted into the other outer cylinder 37. A rubber tube 39 is fitted in the. The overflowing water is injected from the nozzle pipe 38 toward the rubber pipe 39 and circulated into the fine sand settling chamber 2 through the return port 35.

As shown in FIG. 6, the front end side of the fine sand settling chamber 2 includes a support pipe 40a and both suction pipes 40b at its tip.
A T-shaped siphon tube 40 consisting of is attached. Further, as shown in FIGS. 2 and 5, guide rollers 45 are fitted to both suction pipes 40b of the siphon pipe 40, and the suction pipes 40b
A suction port 46 is formed on the lower side of b. 6th
As shown in FIG. 7, this siphon pipe 40
is always below the water surface W of the earth and sand, and the guide roller 4
5 comes into contact with the fine sand S of the upper belt 6a and the rubber tube 42
It is designed to be able to swing vertically by bending. Further, one end of this siphon pipe 40 is connected to the tip of a suction tube 48 extending into the fine sand settling chamber 2 from a storage pit 47 installed outside the collection device main body B. Note that the configuration of this accommodation pit 47 will be described later.

A clean water supply pipe 49 is attached to one side above the fine sand settling chamber 2, and is connected to a delivery pipe 50 disposed at the rear end of the fine sand settling chamber 2, and corresponds to the rear end of the receiving metal fitting 14. Clean water is spouted toward the upper belt 6a. On the front side of the siphon pipe 40, a branch pipe 51 connected to the clean water supply pipe 49, a tube 52 and a shower pipe 53 connected thereto are disposed, and clean water is supplied from the tube 52 and the shower pipe 53. It is designed to be ejected toward the upper belt 6a in front of the siphon pipe 40. Clean water is also sprayed from a shower pipe 54 connected to a clean water supply pipe 49 to the guide roller 9 at the front end of the belt conveyor 5.

Here, the above-described accommodation pit 47 will be explained with reference to FIGS. 1 to 3 and FIG. 5. A pump 55 is disposed within the accommodation pit 47, and the suction port 56 of the pump 55 is open, and the base end of a delivery tube 58 is connected to the discharge port 57. The distal end of the delivery tube 58 is connected to the insertion hole 5 into the mounting portion 59 protruding from the collection device main body B.
9, and extends to the sieve body 18 in the aquarium 1, and is tightly fitted into the mounting hole 60 of the sieve body 18. The delivery tube 58 together with the aforementioned siphon pipe 40 and suction tube 48 constitute suction means for suctioning the turbid water and sending it to the sieve body 18.

Next, the operation of the fine sand sampling device configured as described above will be described below.

When the sediment water supplied from the input pool 17 reaches the overflow channel 22 in the fine sand settling chamber 2, the sediment water flows into the overflow channel 22, collects in the overflow discharge chamber 24, and flows through the opening 26 into the tank. 25. When the overflowing water in the tank 25 is pumped to the discharge pipe 28 by driving the pump 27, a part of the overflowing water flows through the branch pipe 31 to the discharge pipe 30.
and is supplied from this jet pipe 30 into the belt conveyor storage chamber 3. Further, a part of the overflowing water is guided to the circulation opening 34, passes through the jet pipe 33, and is circulated into the fine sand settling chamber 2 through the return port 35. When the belt conveyor storage chamber 3 is filled with overflow water and its pressure increases, the overflow water is mainly returned to the fine sand settling chamber 2 through the circulation pipe 35, and the pressure inside the belt conveyor storage chamber 3 is maintained almost constant. be done. Then, pressure is applied to the lower surface of the upper belt 6a by the pressure water in the belt conveyor storage chamber 3.

Fine sand S contained in the sediment water in the fine sand settling chamber 2
is precipitated on the concave upper belt 6a at the rear end side of the fine sand settling chamber 2. At this time, when clean water is injected from the delivery pipe 50 through the clean water supply pipe 49 toward the fine sand S of the upper belt 6a, the turbidity near the upper belt 6a where the clean water was injected decreases, and Part of the fine sand S is stirred. Therefore, impurities with low specific gravity contained in the fine sand S, such as sludge and dirt, are reliably washed away by the clean water that is spouted out. Immediately after that, when vibration is applied to the fine sand S,
The fine sand S is collected at the center of the belt 6 and the particles are closely spaced, and the fine sand S is transported by the belt conveyor 5 while being separated into particles of extremely high purity. Even during this transfer, the flow of earth and sand water to the overflow channel 22 is blocked by the baffle plate P, and the fine sand S settles on the upper belt 6a.

In particular, since pressure is applied to the lower surface of the upper belt 6a by the pressure water in the belt conveyor storage chamber 33, the weight of the fine sand S and earth and sand water can be received by the pressure water in the belt conveyor storage chamber 3, and the upper The upper belt 6a moves in a state close to floating with respect to the support part 12 that slidably supports both side edges of the belt 6a and the curved plate 14a of the bracket 14 that slidably receives the lower surface of the upper belt 6a. do. Therefore, the support part 12
The frictional resistance generated between the curved plate 14a and the upper belt 6a is reduced, and the load on the belt conveyor 5 is reduced.

Further, the fine sand settling chamber 2 and the belt conveyor storage chamber 33 are separated by the upper belt 6a, but between the two chambers 2 and 3 are the support section 12, the rubber seal plate 13, and the upper belt 6a. There was a risk that earth and sand water would leak together with the fine sand S from the fine sand settling chamber 2 to the belt conveyor storage chamber 3 through the gap formed between the two.
However, due to the pressure balance between the fine sand settling chamber 2 and the belt conveyor storage chamber 3 in this gap, the pressure water in the belt conveyor storage chamber 3 acts as a sealing wall, causing the leakage of earth and sand water from the fine sand settling chamber 2, and the fine sand. Leakage of S is reduced.

Furthermore, since overflow water is supplied from the fine sand settling chamber 2 into the belt conveyor storage chamber 3, fine sand, sludge, etc. contained in the overflow water are transferred to the tail section 4 of the belt conveyor 5.
However, since pressurized water is ejected from the ejection pipe 30 toward the tail roller 7, the tail roller 7 is cleaned and the load on the belt conveyor 5 is reduced.

On the front end side of the fine sand settling chamber 2, impurities such as sludge and dirt contained in the fine sand S of the upper belt 6a float to the surface of the fine sand S because their specific gravity is smaller than the fine sand S, and the tube 52 The clean water jetted from the shower pipe 53 is flowed back toward the siphon pipe 40. At this time, since the clean water stirs the fine sand S, this clean water becomes turbid water containing impurities and a small amount of fine sand S, and is sucked into the siphon pipe 40.

Therefore, impurities are removed from the fine sand S, and the fine sand S is removed by the vibration applied to the belt 6.
The particles are collected at the center in the width direction of the belt 6, and the particles are closely spaced and have extremely high purity.
be carried upwards.

The fine sand S washed and dewatered in this way falls from the front end of the belt conveyor 5 to the discharge port 23 and is collected.

Note that the clean water supply pipe 49 is also passed through the guide roller 9 at the front end of the belt conveyor 5 to the shower pipe 54.
Since clean water is ejected from the guide roller 9, sludge, fine sand, etc. adhering to the guide roller 9 are cleaned, and the load on the belt conveyor 5 is reduced.

Since overflow water from the fine sand settling chamber 2 is supplied to the belt conveyor storage chamber 33, fine sand, sludge, etc. contained in this overflow water are removed from the water drain port 4 of the tail section 4.
When overflow water passes through the jet pipe 33 attached to the water drain port 4a, the jet flow from the nozzle pipe 38 toward the rubber pipe 39 removes the deposits in the water drain port 4a. Among them, fine sand is sucked in, and the fine sand returns to the fine sand settling chamber 2 and settles on the upper belt 6a. Therefore, fine sand does not accumulate in the drain port 4a, and leakage of fine sand is reduced.

On the other hand, the turbid water sucked into the siphon pipe 40 flows into the storage pit 47 via the suction tube 48, and is further pumped into the storage pit 47 by the pump 5.
After being sucked into the suction port 56 of 5, it is discharged to the delivery tube 58 and the sieve body 1 of the collection device main body B
8 not leaked. Since the sieve body 18 is rotated by a motor in advance, the turbid water is vigorously dispersed against the inner surface of the screen 21 due to the centrifugal force generated by the rotation within the sieve body 18. At this time, although the fine sand S in the turbid water passes through the mesh of the screen 21 of the sieve body 18 and is dispersed to the outside of the sieve body 18, the dispersion of impurities is prevented by the mesh of the screen 21. definitely removed. Thereafter, the turbid water containing the fine sand S merges with the earth and sand water that is continuously supplied into the input pool 17, and the above-described operation is repeated. Therefore, when impurities in the earth and sand water are removed by the clean water spouted from the tube 52 and the shower pipe 53, the fine sand S flowing out together with the clean water is not discarded and is recovered without waste.

Next, a second embodiment of the present invention will be described with reference to FIGS. 11 to 13.

In this second embodiment, as shown in FIG. As shown in the figure,
A pair of vibrating bodies 6 are placed in contact with the lower surface of the sieve body 18.
1. When the turbid water falling from the delivery tube 58 passes through the screen 21 of the sieve 18, the mesh of the screen 21 prevents impurities from passing through, and the turbid water and fine sand S in the turbid water are prevented from passing through. The configuration is such that it allows passage.

Note that even if the mesh is clogged with fine sand S when turbid water passes through the screen 21 of the sieve body 18, the vibrating body 61
is activated to give fine vertical vibrations to the screen 21, so that the fine sand S is closely spaced, and the fine sand S passes through the mesh of the screen 21. Therefore, the screen 21 of the sieve body 18 is not clogged with fine sand S.

With this configuration, the structure of the sieve body 18 becomes simple, making it easy to manufacture and reducing manufacturing costs.

Figures 14 and 15 a and b show the siphon tube 40.
This shows another example.

That is, the siphon tube 40 is formed to have a channel-like cross section, and an elastic shielding membrane 63 made of rubber is attached to the lower surface of its tip via a bracket 62. A rod-shaped metal weight 64 extending almost entirely in the width direction is attached to the lower end of this elastic shielding film 63, and as shown in FIG. 15a, normally the fine sand S on the upper belt 6a is are in contact.

In the above-mentioned state, water flowing out to the rear of the fine sand settling chamber 1 is blocked by the shielding membrane 63 due to the water pressure at the front of the fine sand settling chamber 1, so that it does not flow out to the rear of the fine sand settling chamber 2.

In addition, as shown in FIG. 15b, the siphon pipe 4
When cleaning water is jetted from a jet pipe J provided slightly behind the belt 6a, the fine sand S on the upper belt 6a is stirred and the fine particles are lifted up. At the same time, the force of the jet stream causes the shielding film 63 to curve forward, causing the shielding film 63 to curve forward.
A gap is created between the lower end of No. 3 and the fine sand S. Therefore, the fine particles generated during agitation are swept forward through the gap between the shielding film 63 and the fine sand S by the jet flow, and the siphon pipe 40 is passed in front of the shielding film 63.
inhaled into the body.

With this configuration, impurities can be removed even more effectively.

It should be noted that the present invention is not limited to the above-described embodiments; for example, the housing pit 47 of the suction means may be
Of course, arbitrary changes are possible without departing from the spirit of the invention, such as omitting the above and connecting the suction tube 48 and the delivery tube 58 via the pump 55 disposed outside the main body H.

Effects of the Invention As detailed above, the present invention provides a suction means for sucking turbid water generated when impurities are separated from fine sand conveyed by a belt in a water tank, and a The fine sand contained in the sediment water can be collected by installing a sieve body that removes impurities from the turbid water and allows the turbid water and the fine sand contained therein to pass through and flow back into the tank. In addition to being able to reliably remove impurities during the process, fine sand can be collected without waste, and fine sand can be collected with high efficiency, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a first embodiment of the invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view thereof, and FIG. 4 is a partial sectional view showing the support structure of the upper belt. Fig. 5 is a perspective view showing the piping structure, Fig. 6 is a sectional view showing the sieve body, Fig. 7 is a sectional view showing the jet pipe attached to the tail part of the belt conveyor storage chamber 3, and Fig. 8 is a sectional view showing the fine sand. FIG. 9 is a partial perspective view showing a jetting pipe that jets overflowing water from a settling chamber to a tail roller, FIG. 9 is a partial plan view showing a siphon pipe, FIG. 10 is a partial side view, and FIG. 11 is a second embodiment of the present invention. A schematic partial side view showing the embodiment, FIG. 12 is an enlarged plan view thereof, FIG. 13 is a perspective view similarly showing the second embodiment, and FIG. 14 is a perspective view showing another example of the siphon tube.
FIGS. 15a and 15b are schematic explanatory views showing the action of the shielding film, and FIG. 16 is a schematic explanatory view showing the prior art. Water tank...1, belt...6, sieve body...18, siphon tube...40, suction tube...48, delivery tube...58 (these siphon pipe 40, suction tube 48, delivery tube 58) ), fine sand...S.

Claims (1)

[Scope of Claims] 1 In the water tank 1, suction means 40, 48, and 58 are provided for suctioning turbid water generated when impurities are separated from the fine sand S conveyed by the belt 6, and the suction means 40 , 48 and 58, and the turbid water and the fine sand S contained therein are passed through and returned to the water tank 1.
A device for collecting fine sand, characterized in that it is provided with a sieve body 18 for allowing the fine sand to flow into the inside. 2 The suction means includes a siphon pipe 40 provided in the water tank 1 and a siphon pipe 40 connected to the siphon pipe 40.
Suction tube 48 extending into outer receiving pit 47
and a delivery tube 58 that is connected to a pump 55 in the storage pit 47 and further extends to the sieve body 18. 3 The suction means includes a siphon pipe 40 provided in the water tank 1, a suction tube 48 connected to the siphon pipe 40 and extending outside the water tank 1, and the suction tube 4.
8. The fine sand sampling device according to claim 1, further comprising a delivery tube 58 connected to the sieve 8 via a pump 55 and extending to the sieve body 18. 4. The fine sand collecting device according to claim 1, wherein the sieve body 18 is formed by attaching a screen 21 to a frame piece 19. 5. The fine sand collecting device according to claim 1, wherein the sieve body 18 has a hollow truncated cone shape and is rotatably provided in the water tank 1. 6. The fine sand collecting device according to claim 1, wherein the sieve body 18 has a flat plate shape and is installed in the water tank 1 so as to be able to vibrate.