JPS5849784Y2 - sand cleaning machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sand washing machine that washes sand carried out from sand settling areas such as sewage treatment plants.The purpose of this invention is to have excellent cleaning effects and to achieve a high cleaning processing rate per unit time. Our goal is to provide highly efficient sand cleaning machines.

The structure of the present invention is that the peripheral wall of the rotating drum is a non-porous wall from the starting end to approximately the center, and the remaining part is a screen-like perforated wall.
Tooth-like protrusions are arranged along a spiral path on the inner periphery of the peripheral wall, and a discharge window is provided at the terminal end, and the rotating drum is supported in a cleaning tank so that its lower part is inserted into the cleaning water. A sand inlet port is provided at the starting shaft of the drum, an air jet pipe is provided below the perforated wall of the drum in the cleaning tank, and an opening is provided at the bottom of the cleaning tank, through which a flight conveyor is installed. It is characterized by having been installed in series.

Hereinafter, the present invention will be explained with reference to an illustrated embodiment.
2 is a sand inlet, 2 is a rotating drum, 3 is a cleaning tank, 4 is a support frame, 5 is a water supply pipe, 6 is an air jet pipe, 7 is an overflow part, and 8 is a flight conveyor. The structure of each of these parts is as follows. It's like this.

The peripheral wall of the rotating drum 2 is a non-perforated wall 2a from the starting end to the approximate center, and a bar screen-like perforated wall 2b from the remaining end to the end.
As shown in FIG. 4, on the inner circumferential surface of the peripheral wall, a large number of blades 2C are arranged at right angles to each other along a spiral path from the starting end to the terminal end, and the blades 2C are spaced apart from each other. is provided with a large window hole 2d.

This rotating drum 2 has shaft parts 2e and 2f provided at the center of both ends.
It is rotatably supported by a roller 4a provided on a support frame 4, and a motor M is transmitted to a shaft part 2f by a chino C, and a sediment inlet 1 is inserted into the shaft part 2e toward the inside of the drum.

The cleaning tank 3 is supported by a support frame 4, and the lower part of the rotating drum 2 is placed under the water surface.A water supply pipe 5 is installed in the upper part of the cleaning tank 3. wall 2b
An air blowout pipe 6 is provided below, and an overflow part 7 is provided on the outside.
will be established.

The shape of the cleaning tank 3 is formed into a T-shape as shown in FIG. 2 by the inclined walls 3a on both sides, and an opening 3b is provided at the lower end, and a casing 80 of the flight conveyor 8 is connected to the opening 3b.

The casing 80 is horizontal at the opening 3b and before and after the opening 3b, but has an upward slope beyond that so that cleaning water can accumulate up to the same water level as the cleaning tank 3, and a discharge port 81 is provided at a low position at the base.

The water supply pipe 5 is inserted into the center of the rotating drum 2 from the shaft portion 2f, and its tip is supported in contact with the sand inlet 1.

With the above-described configuration, the rotating drum 2 is connected to the sand inlet 1.
As the drum 2 rotates, the sand fed into the drum 2 is stirred by the spirally arranged blades 2C on the inner periphery, and flows toward the terminal end while being washed by the washing water in the drum, and is washed by the perforated wall in the form of a bar screen. At 2b, sand grains smaller than the hole fall through the hole, but large particles that cannot pass through the hole are sent to the end and fall through the window hole 2d.

Further, the air jetted from the air jet pipe 6 below the rotating drum 2 has the effect of removing clogging of the holes when passing from the outside to the inside of the drum perforated wall 2b.

The materials falling through the holes in the perforated wall 2b of the rotary drum 2 and the window holes 2d at the end are carried out by the flight conveyor 8 through the opening 3b at the bottom of the tank.

In the present invention, as described above, a part of the peripheral wall of the rotating drum is formed into a screen-like perforated wall, so that among the settled sand washed in the drum, the fine sand quickly falls through the holes of the perforated wall. Large items that cannot pass through the holes are further cleaned within the drum, which has the effect of improving cleaning efficiency and increasing the amount of cleaning processing per unit time.Also, the blades installed on the inner peripheral wall of the drum are not continuous spiral blades. Since a large number of blades are individually arranged at predetermined intervals along the spiral path, the efficiency of agitation cleaning is improved, and therefore sufficient cleaning can be achieved even if the axial length of the rotating drum is short, making it economically advantageous. The practical benefits are enormous.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention. Fig. 1 is a front view with main parts cut away, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a sectional view of the rotating drum, and Fig. 4 is a cross-sectional view of the rotating drum. FIG. 3 is a partially enlarged sectional view of the rotating drum. 1 is a sand inlet, 2 is a rotating drum, 2a is a non-porous wall of the drum, 2b is a perforated wall of the drum, 2C is a blade, 2d
is a window hole for discharge, 2e and 2f are shaft parts, 3 is a cleaning tank, 3b
is an opening, 4 is a support frame, 5 is a water supply pipe, 6 is an air jet pipe, 7
8 is the overflow part and 8 is the flight conveyor.

Claims (1)

[Scope of utility model registration request] The peripheral wall of the rotating drum is a non-porous wall from the starting end to approximately the center.
The remaining part is a screen-like perforated wall, tooth-like protrusions are arranged along a spiral path on the inner periphery of the wall, and a window hole for discharge is provided at the end, and the lower part of the rotating drum is cleaned. The drum is supported in a cleaning tank so as to be immersed in the water, and a sand inlet is provided at the starting end of the drum, and an air jet pipe is provided in the cleaning tank below the perforated wall of the drum, and the bottom of the cleaning tank is provided with an air jet pipe. A sand cleaning machine characterized by having an opening and a flight conveyor connected to the opening.