JPS63218264A - Ballast classifier - Google Patents

Abstract

PURPOSE:To classify ballast into different grain sizes while water washing the ballast, by passing the raw ballast charged into a water vessel from a hopper through the almost horizontal water current formed at the upper part in the water vessel by a water-jet means to remove the foreign matter such as dirt. CONSTITUTION:The water-jet means 16 for forming an almost horizontal water current at the upper part in the water vessel 1 is provided, and a partition wall 8 is furnished to separate the lower part in the water vessel 1 into plural sections in the flow direction of water. Ballast is charged into the water vessel 1 from the hopper 24 at the position close to the starting end of the water current, and the ballast, etc., settled in each section is separately discharged to the outside of the vessel 1 by conveying means 11-14. As a result, the foreign matter such as dirt and wooden chips is removed, and the ballast can be classified into different grain sizes while being washed with water. Furthermore, since a screen is not used, clogging can be completely obviated, and ballast can be effectively classified over a long period without necessitating any special maintenance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gravel sorting device for washing crushed and excavated gravel raw stone with water and simultaneously sorting it according to particle size.

(Prior art and its problems) Conventionally, a device using a sieve screen is generally known as a device for sorting raw stones for use in gravel according to particle size, but since the mesh of the sieve screen is easily clogged, it is difficult to sort efficiently Not only is it impossible to do this, but the useful life of the sieve screen is short, so the screening cost is relatively high. Moreover, if it is necessary to separate and remove garbage, wood chips, lignite, etc. mixed in the gravel raw stone by washing with water, a washing device must be prepared separately from the sorting device, which increases the equipment cost. In addition, there was a drawback that sorting and washing had to be carried out separately.

(Means for Solving the Problems) The present invention proposes a sorting device that can solve the above-mentioned conventional problems. a hopper for introducing gravel into the tank at a position near the starting end of the water flow; The main feature is that a means for carrying out the gravel, etc. that settles in each section of the tank is separately carried out to the outside of the aquarium.

(Function of the Invention) According to the above-mentioned sorting device, the gravel thrown into the water tank from the hopper passes through a substantially horizontal water stream formed in the upper part of the water tank by the water discharge means. Therefore, floating foreign substances such as garbage and wood chips mixed in the rough stone are separated and removed from the main gravel, etc. and flow together with the water flow, and the remaining main gravel, etc. is washed by the water flow and at the same time, the main gravel, etc. Kinetic energy is given in the direction of the water flow, and it descends in the water in a parabola in the direction of the water flow. At this time, lignite, clay, etc., which have a lower specific gravity than gravel and gravel with small particle size, receive more kinetic energy from the water flow. As a result, gravel with a larger particle size descends closer to the input position, so gravel with a larger particle size settles in the area directly below the input position, and gravel with a larger particle size settles in the area located further away from the input position. This results in the precipitation of small-grained gravel and foreign substances other than gravel. The gravel etc. thus settled in each compartment can be separately carried out of the aquarium by the carrying means.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In Figures 1 and 2, 1 is a water tank, and at the upper part of the front end, a raw stone input channel 2 that protrudes horizontally throughout the tank 1 is connected, and at the upper part of the rear end, there is an overflow part. 3
is formed. 4 is a floating foreign matter collection tank connected to the outside of the overflow part 3, and a water source application net 5
, a drain port 6, and a recovered material removal lower that can be opened and closed. In the lower part of the water tank 1, two compartments 9 and 10 are arranged side by side, separated by a partition wall 8. Each section 9
．． Each section 10 is provided with a separate carry-out passage 11 diagonally upward from the bottom thereof, and a carry-out section for conveying the gravel, etc. settled in each compartment 9, 10, via the carry-out passage 11 to a carry-out port 12 located at a higher place than the water surface. Packet conveyors (or chain conveyors with scraping plates, etc.) 13 and 14 are provided as means, respectively. 15 is an auxiliary sedimentation tank formed between the latter section 10 and the overflow part 3.

Reference numeral 16 denotes a water discharge means for forming a water flow in the upper part of the water tank 1 from the starting end of the raw stone input channel 2 to the overflow part 3. A plurality of water discharge nozzles 1 are arranged in parallel at appropriate intervals.
It has 7. These multiple water discharge nozzles 1 arranged in parallel
7 is connected to a header vibe 19 that distributes water supplied from the pump 18 to each nozzle 17 at approximately equal pressure. Reference numeral 20 denotes an air intake pipe that is fitted around each nozzle 17 concentrically. 21 is a water tank that receives waste water flowing out from the drain port 6 of the floating foreign matter collection tank 4, and the pump 18 pumps the water in this water tank 21 to each nozzle 17.
to be pumped to. The water tank 21 has an automatic water level control valve 22.
The water level is always maintained at a constant level by water supplied from the water supply pipe 23 via the water supply pipe 23.

Reference numeral 24 denotes a hopper for charging gravel for use in the vicinity of the starting end of the raw stone input channel 2, and the opening 24a allows the raw stone to flow out evenly over substantially the entire width of the raw stone input channel 2.

The partition wall 8 between the front and rear sections 9 and 10 is composed of a main gate 25 that can be raised and lowered and fixed, and a sub-gate 26 that is pivotally connected to the upper end of the main gate 25 so that it can swing back and forth and be fixed.

To explain how to use the gravel sorting device configured as above, as shown in the figure, the pump 18 is operated with the water tank 1 filled with water, and the water in the water tank 21 is pumped to the header vibe 19. Then, water is discharged from each nozzle 17 of the water discharge means 16 into the raw stone input channel 2. As a result, a water flow is formed in the upper part of the water tank 1 from the starting end of the rough stone input channel 2 to the overflow part 3. In this state, if a fixed amount of gravel is supplied from the opening 24a of the homper 24 to a position near the starting end of the rough stone input channel 2, the rough stone will flow into the upper layer of the water tank 1 from the rough stone input channel 2 along with the water flow. do. In this process, the gravel that makes up the rough stone receives kinetic energy in the direction of the water flow, so instead of falling vertically from the end of the rough stone input channel 2, the downward gravity and the horizontal kinetic energy are balanced. Draws a parabola and descends through the water.

Therefore, if the specific gravity is the same, the smaller the particle size, the farther it will fall from the end of the raw stone input channel 2, and the floating foreign objects such as garbage and wood chips, and fine soil will be separated from the gravel. and flows together with the water stream. As a result, gravel with a large particle size is precipitated in the section 9 on the side closer to the raw stone input channel 2, and gravel with a smaller particle size is precipitated in the section 10 on the far side. The gravel settled in each of these compartments 9.10 is transported to the transport path 13.
1 and can be continuously carried out from an outlet 12 located higher than the water surface. Floatable foreign matter such as garbage and wood chips flow out together with the water flowing out from the overflow part 3 and are collected in a floating foreign matter collection tank 4, and are taken out from a collected matter removal lower that can be opened and closed at an appropriate time. I can do it.

Water filtered by the water source application net 5 is collected into a water tank 21 through a drain port 6. Also, for fine soil, etc., use the auxiliary settling tank 15.
Therefore, the auxiliary sedimentation tank 15 can be cleaned and taken out at an appropriate time.

In addition, the main gate 25 that constitutes the partition wall 8 between the two compartments 9 and 10
Both compartments 9 , 10, the particle size range of the gravel to be precipitated can be arbitrarily adjusted.

Furthermore, when an air intake pipe 20 is attached to each nozzle 17 of the water discharge means 16 as shown in the figure, air is sucked from the air intake pipe 20 by the injection action of water discharged from each nozzle 17, An air layer is formed around the water stream discharged from 17. As a result, the straightness of the water flow discharged from each nozzle 17 is improved.

As shown in the embodiment of FIG. 3, all or part of the raw stone input channel 2, the auxiliary method RPts, the air intake pipe 20, etc. can be omitted. Furthermore, as shown in the figure, arranging the water discharge means 16 in a plurality of upper and lower stages to increase the vertical thickness of the water flow formed in the upper layer of the water tank 1 is also effective in increasing the gravel sorting effect. It is true. Although the water discharging means 16 is constituted by a plurality of nozzles 17 arranged in parallel, it is also possible to constitute it by a slit-shaped nozzle whose width is approximately the same as the width of the water tank 1 (or its width when using the raw stone input channel 2). be.

Furthermore, as shown in FIG. 3, between the two compartments 9 and 10, there is a small auxiliary compartment 27 at the front and the middle, which is constructed by a pair of front and rear partition walls 9a and 9b, and a packet for carrying out the gravel settled in this auxiliary compartment 27. A conveyor (or a chain conveyor with a scraper plate, etc.) 28 can be installed. In this case, gravel with an intermediate grain size is allowed to fall and settle in the auxiliary compartment 27, so that the minimum grain size of the gravel that settles in the main compartment 9 and the maximum grain size of the gravel that settles in the main compartment 10 can be clearly separated. Of course, the intermediate particle size gravel that settles in the auxiliary compartment 27 can also be used as a product, but depending on the case, it can also be returned to the hopper 24 via the circulation conveyance path 29 shown in phantom lines. In this way, the number of compartments formed in the lower part of the aquarium 1 is not limited.

Further, as shown in the illustrated partition walls Ba and 8b, the partition wall between the compartments can be constructed only from the main gate 25 which can be fixed up and down, or the sub gate 2 which can be fixed and swung back and forth as shown in FIG.
It is also possible to construct the partition wall from only 6.

(Effects of the Invention) As described above, according to the gravel sorting device of the present invention, it is possible to remove foreign substances such as garbage and wood chips from raw gravel for use in gravel, and to sort the gravel by particle size while washing it with water. Since it is not used, there is no fear of clogging (it can be efficiently sorted for a long time without any special maintenance work, and it can be expected to significantly reduce the cost of washing and sorting.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing the first embodiment, FIG. 2 is a longitudinal sectional front view thereof, and FIG. 3 is a longitudinal sectional side view showing the second embodiment. 1... Water tank, 2... Raw stone input channel, 3... Part of overflow, 4... Floating foreign matter collection tank, 8.8a, 8
b... Bulkhead, 9, 10.27... Compartment, 11...
Carrying out passage, 12... Carrying out exit, 13, 14.28...
bucket conveyor (or chain conveyor with scraping plate, etc.), 15... auxiliary sedimentation tank, 16... water discharge means,
17... Nozzle, 18... Pump, 19... Hesogoo pipe, 21... Water tank, 24... Gravel input hopper, 25... Main gate that can be raised and lowered,
26...Sub-gate that can be fixed by swinging back and forth.

Claims (1)

[Claims] A water discharge means for forming a substantially horizontal water flow is provided in the upper part of the water tank, and a partition wall is provided that divides the lower part of the water tank into a plurality of sections in the direction of the water flow. A gravel sorting device comprising: a hopper into which gravel is thrown; and a carrying means which separately carries out gravel, etc. settled in each section of the tank to the outside of the tank.