JPS6110761Y2 - - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to obtain an excellent sand-settling cleaning device that can automatically clean dirty sand with high efficiency.

In order to achieve the above objectives, this invention provides a bar screen at an appropriate depth below the water surface in the cleaning tank, an air outlet below the bar screen, and a sand discharge section connected diagonally upward at one end of the cleaning tank. A flight conveyor is provided which circulates through the washing tank and the sand discharge section, and the flight conveyor has inward and outward scraping plates, and the inward scraping plates cover the top surface of the bar screen during going out. The present invention is characterized in that an outward scraping plate scrapes the bottom of the cleaning tank during scraping and going back, and further scrapes up and discharges sand through the bottom of the sand discharge section.

Hereinafter, the present invention will be explained with reference to an embodiment shown in the drawings. 1 is a cleaning tank, 2 is a partition wall, 3 is a sand inlet port,
4 is a sand discharge section, 5 is a bar screen, 6 is an air outlet, 7 is a flight conveyor, 8 is an inner bottom made of high-tensile steel plate laid alternately along the entire bottom length of the cleaning tank 1 and the sand discharge section 4, The following parts are constructed as follows.

The cleaning tank 1 has vertical walls 10 on both sides, an inclined wall 11 continuing below it, a flat bottom 12, a starting wall 13, and an ending wall 1.
4, and is provided with an overflow hole 15 and a groove 16 on both sides, a movable weir 17 at the end, and a drainage channel 19 with a screen 18 below the outside.

The partition wall 2 is provided inside the vertical wall 10 of the cleaning tank 1 at an appropriate interval from the top to the middle of the depth of the pair of cleaning tanks 1, and inside the partition wall, the cleaning tank 1 is located at the bottom.
It is open inside.

The sand inlet 3 is provided on the upper surface of the starting end of the cleaning tank 1, and the sand discharge section 4 is provided at the starting end of the cleaning tank 1 with a sloped wall 41 and a bottom 42 continuing from the sloped wall 11 and flat bottom 12 at the bottom of the tank. A side wall 43 following the partition wall 2 is formed to protrude obliquely upward and higher than the water surface in the cleaning tank, and a sand discharge port 44 is provided in the bottom 42 at the upper end at a position higher than the water surface. There is.

The bar screen 5 is supported horizontally by a receiving member 21 provided at the lower part of the partition wall 2, and the air outlet 6 blows out air from below toward the bar screen 5. A plurality of branch pipes 62 are inserted horizontally below the bar screen 5 from the air pipe 61, and each branch pipe 62 is provided with a plurality of air jet ports 6 facing upward.

The flight conveyor 7 circulates within the cleaning tank 1 and the sand discharge section 4, and is constructed by providing a pair of endless chains 70 with inward scraping plates 71 and outward scraping plates 72 alternately provided at appropriate intervals. 70 is hung around inside the cleaning tank 1 and sand discharging section 4 by means of a drive sprocket 73 and a guide sprocket 74 placed at a predetermined position, and the inward scraping plate 71 can be moved back and forth from the starting end of the cleaning tank 1 to the ending end. The scraping plate 72, which is directed outward while scraping the upper surface of the bar screen 5, advances while scraping the upper surface of the inner diameter 8 in a backward movement from the terminal end of the cleaning tank to the upper end of the sand discharging section 4.

With the above configuration, cleaning water is filled in the cleaning tank 1 to a required water level, air is jetted out from the air outlet 6, the flight conveyor 7 is operated, and dirty sediment is inputted from the sediment input port 3. The sand particles are agitated and dispersed in the water by the air flow ejected from the air outlet 6 and the progress of the scraping plates 71 and 72 of the flight conveyor 7, so that the sand particles come into good contact with the water and are quickly and efficiently washed. The floating matter flows out from the overflow hole 15, and the sand caught on the bar screen 5 is scraped up by the inward scraping plate 71 and falls from the end of the bar screen 5 to the bottom of the cleaning tank 1. The sand that has settled on the inner bottom 8 in this way is scraped off by the outward-facing scraping plate 72 that goes back and forth, and is carried toward the sand removal section 4, and then continues on the upward slope of the inner bottom 8 of the sand removal section. It is scraped up and discharged from the discharge port 44. After discharging, the flight conveyor 7 moves forward by the driving sprocket 73 and enters the cleaning tank 1, and the above-mentioned operation is repeated.

The advantages of the present invention are summarized as follows.

(1) Not only is the dirty sediment in the cleaning tank stirred and dispersed by air jets and the operation of the flight conveyor to quickly clean it, but the sand that does not pass through the bar screen is stopped on top of it and subjected to the cleaning action. However, the sand that has been scraped off by the flight conveyor and settled at the bottom of the cleaning tank is washed up by the flight conveyor to the upper end of the sand discharge section, and secondary cleaning is performed, so that the cleaning effect is enhanced.

(2) The structure is simple because the flight conveyor serves both to transport the suspended sand in the cleaning tank and to carry out the sand that has settled to the bottom of the tank.

(3) Even if sand settles to the bottom of the tank through the slits in the bar screen that overcome the upward force of the ejected air, the sand is transported to the discharge port by the flight conveyor, making maintenance management easy.

(4) It is easy to secure an effective opening area for the bar screen, and there is no risk of inhibiting the air ejection pressure.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is a front view, Fig. 2 is a plan view, and Fig. 3 is a view similar to Fig. 1-
FIG. 1 is a cleaning tank, 2 is a partition, 3 is a sand inlet, 4 is a sand discharge section, 5 is a bar screen, 6 is an air outlet,
7 is a flight conveyor, 71 is an inward scraping board,
72 is an outward scraping board.

Claims (1)

[Scope of utility model registration request] A bar screen is provided at an appropriate depth below the water surface in the cleaning tank, and an air outlet is provided below the bar screen, and a sand discharge section is installed diagonally upward at one end of the cleaning tank, and the interior of the cleaning tank and sand discharge section is A flight conveyor is provided that circulates through the conveyor, and the flight conveyor has inward and outward scraping plates, with the inward scraping plate scraping the upper surface of the bar screen on the outbound trip, and the outward scraping plate on the return trip. A sand settling and cleaning device characterized in that a plate scrapes the bottom of a cleaning tank and further scrapes up and discharges sand through the bottom of a sand discharge section.