JPH0227020B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinding machine for washing earth and sand mined from a riverbed or the like with water.

In general, as aggregate sand for civil engineering and construction, it is required to have good cleaning properties by removing and washing impurities such as organic matter on the sand surface, and at the same time, it is desirable to have good dehydration properties with little entrained water.

SUMMARY OF THE INVENTION In order to meet such demands, it is an object of the present invention to provide a grinding machine with a simple structure and high sand washing ability.

That is, the present invention generally has a sand inlet and a sand outlet at the other end, and is capable of vertical vibration, and is installed in a conical horizontal rotating container whose diameter increases from the sand inlet to the sand outlet. One or more weir plates for sand overflow are provided to form a plurality of compartments, and each compartment is provided with a water collection gutter, and the bottom of each compartment is provided with a sand washing water spout that opens toward the sand discharge port side. , a pressurized water or pressurized air outlet opening upward is provided at a portion immediately before the weir plate at the bottom of each compartment, and a water-permeable scooping member for cleaning sand and the scooping member are provided at a sand discharge port portion of the rotating container. This polishing machine is characterized in that it is equipped with a discharge member for discharging sand falling from the sand toward the sand discharge port.

An embodiment of the present invention will be described based on the drawings.A sand inlet 1 is opened at one end, and a sand outlet 2 is opened at the other end, and vertical vibration is possible.
By providing a sand overflow weir plate 4, which is an annular plate, in the horizontal rotary container 3 that increases in size from the side toward the sand discharge port 2 side, a compartment chamber 3a on the sand input port 1 side is provided in the rotary container 3. A compartment 3b on the sand discharge port 2 side is formed. Each of the compartments 3a and 3b is provided with a water collection gutter 5a and 5b, and a washing water jet pipe 6a and 6b having an open end extending from the sand input port 1 side to the sand discharge port 2 side is provided at the bottom of each compartment. In addition, a pressurized water spouting pipe 7 having an upward open end is provided at the bottom of each compartment just before the weir plate 4. Further, at the rear end of the compartment 3b, that is, at the opening of the sand discharge port 2, a plurality of water-permeable raking blades 8 are provided radially on the inner surface of the rotary container 3 as members for scooping up sand. A water sprinkling nozzle of the washing sand water sprinkling pipe 6c is also opened directly above the washing sand water sprinkling pipe 6c, and a discharge chute 9 is disposed to receive the sand falling from the raking blades 8 and discharge it to the outside of the rotary container 3.

The rotating container 3 is provided so as to be able to rotate while vibrating up and down by a spring 10, a vibration table 11, and a support roller 12 (the rotational drive device is not shown). The vibration generator 13 is attached to the vibration table 11, and specific examples thereof include an electromagnetic vibrator, a percussion vibrator, and the like.

In the figure, reference numeral 14 denotes a washing water supply pipe capable of supplying pressurized fresh water, which is connected to the washing sand water spouting pipe 6.
a, 6b, a washing sand water sprinkling pipe 6c, and a pressurized water spouting pipe 7 are branched and connected. 15, 15' are valves, 1
6 is the input chute, 17 is the frame, 18 is the tire,
19 is a drainage receiver, and 20 and 20' are drainage pipes.

Therefore, the soil and sand adhering to or accompanied by impurities is supplied into the rotating container 3 by the input chute 16,
The soil tries to settle (some of it settles) at the bottom of the rotating container 3, but because the pressurized water from the sand washing water spouting pipe 6a is sprayed toward the sand discharge port 2 side, and the rotating container vibrates. Since the bottom surface of the weir plate 3 is inclined, the earth and sand are transferred toward the weir plate 4 due to its own weight. During this time, the earth and sand are sufficiently stirred by the pressurized water and are also subjected to vibrations from the bottom of the rotating container 3, resulting in a grinding action (an action in which the sand is rubbed and washed by repeated friction and collision with each other). Then, just before the weir plate 4, pressurized water is ejected upward from the pressurized water jet pipe 7, so the earth and sand circulates in the vertical direction, and a sand washing action occurs here as well, and some of the circulating sand overflows the weir plate 4. It flows into the compartment 3b. On the other hand, floating or low specific gravity impurities such as organic matter separated from the sand surface and mud flow into the water collection gutter 5a as muddy water and are discharged to the outside from the discharge pipe 20 (the discharge pipe 20 is used as a siphon pipe). (but may be pumped with a vacuum pump if desired). Thereafter, the sand is similarly washed in the compartment 3b by the pressurized water and vibrations from the sand washing water spouting pipe 6b and washed again, and then reaches the location where the raking blades 8 are provided.

Here, the sand is further subjected to the cleaning action of pressurized water from the washing sand water sprinkling pipe 6c and the dehydration action of the vibration of the rotating container 3, and is raked up to the ceiling of the container, and then falls onto the discharge chute 9 and is separated. The sludge, etc. is discharged from the sand discharge port 2 through the overflow drainage receiver 19 to the outside of the system. Incidentally, since the entire rotating container 3 is vibrating, the sand that has settled before and after the weir plate 4 is also washed in the same manner.

As shown in the illustrated example, it is preferable that the overflow height of the weir plate 4 is lower than the height of the upper end of the water collection gutter 5a, 5b, thereby improving the separation effect of sand and mud. Further, a high-pressure air jet pipe may be provided in place of the pressurized water jet pipe 7, or a structure may be adopted in which muddy water overflows from the sand input port 1.
A structure in which a plurality of the weir plates 4 are provided to form three or more compartments in the rotating container 3, and each of these compartments is provided with a sand washing water jet pipe, a pressurized water jet pipe, and a water collection gutter. This can significantly enhance the sand cleaning effect.

As described above, in the grinding machine of the present invention, a plurality of compartments are formed by partitioning the inside of the rotating vibrating conical container with an inclined bottom surface with a weir plate, and in each compartment, the sand washing water and the rotating container are separated. In addition to abrading the sand by vibration, the mud separated from the sand is discharged as muddy water through a collection gutter, and the sand is transported by the flushing action of sand washing water and the sand's own weight. By using this method, the spiral feed blades conventionally installed in rotary classifiers are omitted, and the dewatering effect is generated by vibration on the scooping member, so that the raw material soil can be polished in a multi-stage manner. It is possible to obtain washed sand with good cleaning and dehydration properties, and the transfer of sand at the bottom of each compartment is performed smoothly, and the scooping member scoops up sand that is being dehydrated, so the sand transfer efficiency is improved. It is possible to process a large amount with an expensive and therefore compact device, and the structure is simple and can be provided at low cost.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of the present invention. 3... Rotating container, 3a, 3b... Compartment chamber, 4... Weir plate, 5a, 5b... Water collection gutter, 6a, 6b... Washing sand water spouting pipe, 6c... Washing sand water sprinkling pipe, 7... Pressurized water spouting pipe,
8... Scraping blade, 9... Discharge chute, 11... Vibration table, 13... Vibration generator, 14... Cleaning water supply pipe,
19... Drainage receiver, 20, 20'... Drain pipe.

Claims (1)

[Claims] 1 Sand is poured into a conical horizontal rotating container with a sand inlet at one end and a sand outlet at the other end, which is capable of vertical vibration, and whose diameter increases from the sand inlet to the sand outlet. One or more diversion weir plates are provided to form a plurality of compartments, and each compartment has a water collection gutter, a washing sand water spout opening toward the sand discharge port at the bottom of each compartment, and each compartment. A pressurized water or pressurized air jet opening opening upward is provided at a portion immediately before the weir plate at the bottom, and a water-permeable scooping member for cleaning sand and a water-permeable scooping member for cleaning sand falling from the scooping member are provided at the sand discharge port portion of the rotating container. A grinding machine characterized by comprising a discharge member for discharging sand toward the sand discharge port.