JPH05123603A - Gravel grader - Google Patents

Abstract

PURPOSE:To easily perform maintenance by simply removing small stones clogged between bar stocks constituting the screen of a gravel grader in relation to this gravel grader for separating and recovering gravel from waste washing water of a concrete mixer truck or earth and sand. CONSTITUTION:The gravel grader is constituted as described below. An introduction port 5 is provided in the upper part of an instrumental box 1 and a discharge port 6 is provided in the lower part thereof. Fixed screens 8a-8e and movable screens 12a-12e are constituted by parallel arranging a plurality of pieces of bar stocks at the equal intervals. These fixed screens 8a-8e and movable screens 12a-12e are arranged in the inside of the instrumental box 1 so that the respective bar stocks are regulated to a downward tilted attitude directed to the discharge port 6 from the introduction port 5. Moreover, power sources are provided in the movable screens 12a-12e so that the bar stocks 13, 13... thereof are released and moved from the intervals of the respective bar stocks of the fixed screens 8a-8e.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravel sorter for separating and collecting gravel from washing wastewater of concrete mixer trucks, earth and sand or the like.

[0002]

2. Description of the Related Art Wastewater mixed with gravel, sand, cement, etc. discharged when a concrete mixer truck is washed is first separated and collected in a wastewater treatment facility. For separating and collecting this gravel, a sieving device has been conventionally used in which a large number of rods are arranged in parallel at regular intervals and a screen is arranged in an inclined shape. Pebbles of approximately equal diameter tend to get stuck and clog.

Further, in the gravel sorter disclosed in Japanese Utility Model Publication No. 61-29489, in order to prevent the above-mentioned clogging, a plurality of short screens are arranged at the upper and lower steps and are arranged between bars. The pebbles sandwiched between the pebbles are easily separated at the step.

[0004]

However, the pebbles that have entered tightly between the rods cannot be easily removed and must be removed by periodically hitting the screen with a hammer, which is troublesome. There was a problem of damaging the screen.

[0005]

DISCLOSURE OF THE INVENTION The gravel sorter of the present invention is intended to solve the above-mentioned problems, and a bar of equal length is placed in a container box having an input port on the upper side and a discharge port on the lower side. A plurality of fixed screens are arranged in parallel at equal intervals and a movable screen is arranged such that the rods are in a downwardly inclined posture from the inlet to the outlet, and each rod of the movable screen is a fixed screen. It is characterized in that the movable screen is provided with a power source so that the movable screen can be moved away from the space between the bars.

[0006]

The bar material of the movable screen moves away from the space between the bar members of the fixed screen, and the pebbles clogged between the bar members fall.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. A rectangular tube-shaped container box 1 has a funnel-shaped reservoir chamber 2 formed in a substantially lower half portion thereof, and a sand discharge valve 3 is provided at a lower end of the reservoir chamber 2. Reference numeral 4 denotes a drainage outlet provided on the side wall of the reservoir 2 for water overflow. An input port 5 is provided above the side wall 1a of the container box 1, and a side wall 1b facing the side wall 1a is provided with a discharge port 6 below the input port 5.

The side walls 1c, which are orthogonal to the side walls 1a, 1b,
Horizontal beams 7a, 7a, 7b, 7b, 7c, 7c between 1d,
7d, 7d, 7e and 7e are installed and fixed from the inlet 5 to the outlet 6.

Numerals 8a to 8e are fixed screens formed by arranging a plurality of rods (round rods) 9, 9 ... Of equal length in parallel at equal intervals and fixing a horizontal rail 10 to the lower side by welding. ,
The fixed screens 8a to 8e are connected to the horizontal beams 7a and 7a.
˜7e, 7e are supported so as to be inclined.
The fixed screens 8a to 8e are arranged such that the lower end of the upper fixed screen is overlapped with the upper end of the lower fixed screen to form the step 11.

On the other hand, 12a to 12e are movable screens,
In the movable screen, the rods 9, 9 ... And rods 13, 13 ... Of substantially the same length and the same diameter are arranged in parallel at the same interval, and a connecting member 14 is welded orthogonally to the lower end of one end of the rods. A connecting rod 15 is orthogonally welded to the lower side of the member, and a rotary shaft 16 is fixed to the connecting member 14 in parallel with a bolt (not shown).

The movable screens 12a to 12e are provided.
Bearings 18a to 1 in which the rotating shaft 16 of the above is provided on the side walls 1c and 1d
Cranks 19a to 19e are fixed to the projecting ends of the rotary shaft 16 outside the container box 1, respectively.

Reference numeral 20 denotes a fluid cylinder which is a power source mounted on the outside of the container box 1 via a bracket 21. The tip of the operating shaft of the cylinder 20 is connected to the tip of the crank 19b by a pin 22. Further, the crank 19b and the crank 19a are linked by a link 23a, and the crank 19b and the crank 1 are
9c and link 23b, crank 19c and crank 19
Link d to link 23c, crank 19d and crank 19e
And 23 are pin-jointed to each other by a link 23d, and when the cylinder 20 operates and the crank 19b swings, all the other cranks 19a, 19c, 19d and 19e also swing simultaneously to rotate the rotary shafts 16.

Reference numeral 24 denotes a curtain plate provided in the container box 1 so as to face the charging port 5. The curtain plate 24 prevents water, sand, pebbles, etc. flowing from the charging port 5 from jumping in the container box 1. prevent.

Reference numeral 25 is an inclined guide plate installed between the charging port 5 and the upper end of the fixed screen 8a. Reference numeral 26 is an inspection port opened on the upper surface of the container box 1. 27 and 27 are side walls 1
An enclosure plate fixed to the inner surfaces of c and 1d so as to cover both side edges of the fixed screens 8a to 8e.

In use, this gravel sorter supports the movable screens 12a to 12e in a tilted manner like the fixed screens 8a to 8e by contracting the cylinder 20 as shown in the figure, and superposes on the fixed screens 8a to 8e. Then, the rod members 9, 9 of the fixed screens 8a to 8e ...
Between the movable screens 12a to 12e, the bar members 13, 13 ...
Are arranged parallel to each other, and waste water mixed with concrete or earth and sand is caused to flow in through the charging port 5 in this state.

The wastewater flowing in from the inlet 5 flows down on the fixed screens 8a to 8e and the movable screens 12a to 12e toward the outlet 6, and the fine sand is bar material 9 and 13 between them.
Falls from the gap and collects in the storage chamber 2 together with water. On the other hand, the gravel is discharged to the outside through the discharge port 6 without being dropped, and is separated and collected.

In this gravel sorter, the cylinder 2
0 to extend the cranks 19a, 19c, 19d, 19e
.. is rotated, the bar members 13, 13 ... Of the movable screens 12a-12e swivel upward as shown in FIG. 2, and the bar members 9, 13. ...... moves away. Therefore, the rods 9, 9 ..., 13, 13 ...
The pebbles sandwiched between the gaps will fall and the so-called clogging can be eliminated.

In this embodiment, the step 11 is provided so that the pebbles can be more easily separated from the bars.

[0019]

As described in the above embodiments, according to the gravel sorter of the present invention, pebbles clogged between the rods can be easily removed, which has a beneficial effect of facilitating maintenance.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a gravel sorter of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

4 is a cross-sectional view of FIG.

[Explanation of symbols]

 1 Instrument Box 5 Input Port 6 Discharge Port 8a to 8e Fixed Screen 9,9 …… Bar Material 11 Steps 12a to 12e Movable Screen 13, 13 …… Bar Material 16 Rotating Shaft 20 Fluid Cylinder

Claims (1)

[Claims] 1. A fixed screen and a movable screen in which a plurality of rods of equal length are arranged in parallel at equal intervals in a container box having an input port on the upper side and a discharge port on the lower side. Are arranged so as to be inclined downward from the inlet to the outlet, and a power source is provided on the movable screen so that each rod of the movable screen can move away from the space between each rod of the fixed screen. Gravel sorting machine characterized by that.