JPH02101B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on a rotary rotary machine which is used to separate and collect precipitated sand from water and mud from sand-mixed water that is produced when earth and sand mined from riverbeds, etc. are washed and sorted using an aggregate classifier. Regarding classifier.

Conventionally, rotary classifiers are used to collect settled sand from rivers, which has been used as aggregate sand for concrete and asphalt roadbeds. The raking blades are lifted and the settled sand is dropped onto a carrying-out member such as a carrying-out conveyor to be led out of the drum.

When classifying sand with this rotary classifier, the sand that settles at the bottom of the rotating drum is massaged by the action of the spiral blades as the rotating drum rotates, and impurities such as dirt and mud (with low specific gravity) are removed. The sand is then transported to the sand sampling port. These impurities float to the surface and are transferred to the drain side and discharged out of the rotating drum along with the water, but they also tend to remain on the sand sampling port side, forming a layer on the water surface and forming settled sand that is successively scooped up by the raking blades. The particles adhere to the surface of the sand and are mixed with the precipitated sand that has been washed, reducing the degree of cleaning of the classified sand. The increased proportion of impurities such as fine particles significantly deteriorated the commercial value of sand for concrete, and the inconvenience and inconvenience of having to run the sand through the sand washing machine again to achieve the required degree of cleaning was caused. .

In order to solve these conventional problems, the present invention provides a rotary classifier that can efficiently extract sand from raw water, as well as recover the collected sand as sand with significantly improved cleanliness and good dewatering conditions. It is in.

In the present invention, one of the openings on both sides of a rotating drum into which mixed water containing sand is input and the sand is precipitated at the bottom is a drainage port and the other is a sand sampling port, and the precipitated sand in the rotating drum is drained from the sand sampling port. In the rotary classifier, the sand is conveyed to the side, scooped up from the water, conveyed to the ceiling, and allowed to fall, and further provided with a sand conveyance member that receives the falling sand and conveys the sand to the outside of the rotating drum. This rotary classifier is characterized by being equipped with an introduction section that can suction and remove floating matter near the water surface.

Next, an embodiment of the present invention will be described with reference to the drawings. At one end of the rotating drum 1 installed horizontally,
A drain side end plate 2 and a first annular partition plate 3 connected thereto are provided to form an insertion opening for the raw water input chute 4, and a third annular partition plate 5 as a drain side end plate is provided at the other end. 3. A second annular partition plate 6 is provided adjacent to the annular partition plate 5, and a spiral blade (screw ribbon) 7 is provided for transferring sand from the first annular partition plate 3 side toward the third annular partition plate 5. The rotating drum 1
A first rake blade 8 made of a water-permeable material is provided on the first annular partition plate 3 side of the second annular partition plate 6 in contact with the second annular partition plate 6; Between the plate 6 and the third annular partition plate 5, second raking blades 9 also made of a water-permeable material are arranged radially on the inner wall of the drum 1, and
A primary discharge chute 10 receives the settled sand that falls after being transferred to the ceiling by the first raking blade 8 and guides it to a chamber partitioned by the second annular partition plate 6 and the third annular partition plate 5; A secondary discharge chute 11 is provided for discharging the precipitate that falls after being transferred to the ceiling by the raking blades 9 to the outside of the third annular partition plate 5. In addition, the third
The inner diameter of the opening of the annular partition plate 5 is the same as that of the second annular partition plate 6.
The inner diameter of the opening is smaller than the inner diameter of the opening.

Furthermore, an elastic ring 12 is provided which is connected to the third annular partition plate 5 and forms a part of the rotating drum 1, and both ends of the elastic ring 12 are connected to the third annular partition plate 5 and the fourth annular partition plate 13. Third raking blades 14 are provided radially protruding from the inner periphery of the elastic ring 12, and the settling sand that falls after being transferred to the ceiling by the third raking blade 14 is received and discharged to the outside of the rotating drum 1. Tertiary discharge chute 15 for
is provided through the opening of the fourth annular partition plate 13.

In the chamber defined by the third annular partition plate 5 and the fourth annular partition plate 13, an introduction part 16 is provided which can suck and remove floating impurities separated from the sand.
This introduction part 16 is provided by connecting a differential user pipe 21 having a jet water nozzle 20 connected to a jet water supply part 19 as an ejector to a pipe 18 having a suction port 17 formed in a flat funnel pipe. .

Further, in the space formed by the second annular partition plate 6 and the third annular partition plate 5, a third raking blade 1 is provided.
A guard plate 27 is provided to prevent the settled sand raked up by the rotary drum 1 from falling. Having it function as a partition plate is effective in preventing floating objects from adhering to the sand being raked up.

On the other hand, vibrating devices 22 and 22' are provided directly above and below the elastic ring 12, respectively, for applying repeated impacts to the elastic ring 12. The vibrating devices 22 and 22' are structured to transmit vibrations from the oscillator 22a to the elastic ring 12 via the roll 22b, and the roll 22b rotates following the rotation of the rotating drum 1. There is. In this case, a plurality of rolls 22b provided at the bottom are arranged side by side over an appropriate range from directly below in the direction of rotation to effectively wash and deposit sand.

In addition, an inclined plate sedimentation device 23 is provided at the bottom of the rotating drum 1 near the first annular partition plate 3, and a rectifier plate 24 is provided on the side of the first annular partition plate 3 near the opening at the tip of the raw water input chute 4. The primary discharge chute 10 and the secondary discharge chute 11 each have a cleaning water sprinkler pipe 2 for cleaning settled sand.
5 and 26 are arranged.

4 to 6 show another embodiment, in which a pump is used as the suction power source for the introduction section 16.

In the figure, 28 is a water supply pipe, 29 is a raw water inlet, 30 is a pedestal, 31 is a drainage chute, 32 is a drainage port, 33
is a tire, 34 is a support roll, 35 is a bearing, 36
37 is a chain, 37 is a drive device, 38 is a ladder, 39 is a suspension frame, 40 is a chain wheel, 41 is a support, 42 is a pedestal, and 43 is a branch piece.

The following various embodiments can be adopted in the present invention. That is, it is effective to provide the introduction part 16 not only in the terminal compartment in the direction of sedimentation sand movement, but also at an appropriate position along the way, especially in a compartment provided with raking blades.
3, a downfall plate may be immersed in the water on the side of the first annular partition plate 3, or the space from the vicinity of the opening at the end of the raw water input chute 4 to the third annular partition plate 5 may be covered with two or more annular partition plates. In addition to partitioning, members similar to a raking blade, a discharge chute, and a washing water sprinkling pipe are arranged in each of these plurality of compartments, or they are formed by a third annular partition plate 5 and a fourth annular partition plate 13. The space to be filled is divided by one or more annular partition plates, and members similar to the raking blades, discharge chute, and vibrating device are arranged in each of these plurality of compartments, and furthermore, the vibrating device 22 is Alternatively, a hammering device or a pressing member can be provided, or a hammering device can also be provided instead of the lower vibration device.

Further, a washing water sprinkling pipe may be provided in the tertiary side discharge chute 15, the third raking blade 14 may be made of a water-permeable material, or a washing water sprinkling pipe may be provided within the space.

Furthermore, a discharge conveyor such as a belt conveyor may be used instead of the discharge chute.

Therefore, the raw water is supplied to the raw water input port 29,
The raw water is supplied into the rotating drum 1 through the raw water input chute 4. The settled sand is transferred to the first raking blade 8 by the spiral blade 7, then transferred to the ceiling by the first raking blade 8, and then falls into the primary discharge chute 10, and is then transferred to the third annular partition plate 5 and the second raking blade 8. The water is supplied together with cleaning water into a room partitioned by an annular partition plate 6. Here, the settled sand undergoes secondary cleaning and is transferred to the ceiling by the second raking blade 9, and then transferred to the secondary discharge chute 11.
Then, it is supplied together with washing water to a chamber defined by the third annular partition plate 5 and the fourth annular partition plate 13, where it is tertiary washed and precipitated. The settled sand deposited between the third raking blades 14 receives repeated impacts from below the bottom of the elastic ring 12, and becomes compacted while removing impurities adhering to the sand.

Here, impurities that have separated from the sand and are floating are removed to the outside of the rotating drum 1 by the introduction section 16, so that when the sand is scraped up from the liquid, the separated floating substances are not accompanied again, and the third scraping process is performed. It is transported to the ceiling by the upper blade 14. This settled sand is firmly held between the third raking blades 14, 14, so normally it does not fall even when it reaches the ceiling, but here, due to the repeated impact applied via the elastic ring 12 by the vibrating device 22, Receives effective falling action,
After falling into the tertiary discharge chute 15, it is discharged to the outside of the rotating drum 1.

As described above, the rotary classifier of the present invention has
Not only can sand be efficiently extracted from raw water, impurities once separated are forcibly discharged outside the drum, resulting in high-quality sand that can be transported to the site of use as is, and stable work is guaranteed and safety is assured. This is something that can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view, Fig. 2 is a front view, Fig. 3 is a partially cutaway slope view, Fig. 4 is a longitudinal sectional view of another embodiment, and Fig. 5 is a sectional view taken along the line of Fig. 4. , 6th
The figure is a sectional view taken along the line of FIG. 4. 1... Rotating drum, 2... Drain side end plate, 3...
First annular partition plate, 4... Raw water input chute, 5...
...Third annular partition plate, 6...Second annular partition plate, 7...
...Spiral blade, 8...First raking blade, 9...Second
Scraping blade, 10...Primary discharge chute, 11...
Secondary discharge chute, 12... Elastic ring, 13...
...Fourth annular partition plate, 14...Third raking blade, 15
...Tertiary discharge chute, 16...Introduction, 17...
... Suction port, 18 ... Pipe, 19 ... Jet water supply section, 20 ... Jet water nozzle, 21 ... Differential user piping, 22 ... Vibration device, 23 ... Inclined plate sedimentation device, 24 ... Straightening plate , 25, 26...
...Washing water sprinkler pipe, 27...Guard plate.

Claims (1)

[Scope of Claims] 1 One of the openings on both sides of a rotating drum into which mixed water containing sand is introduced and the sand is precipitated at the bottom is a drainage port, and the other is a sand sampling port, and the precipitated sand in the rotating drum is In a rotary classifier, the sand is transported to the sand sampling port side, scooped out of the water, transported to the ceiling, and allowed to fall, and further provided with a sand transport member that receives the falling sand and transports the sand out of the rotating drum,
A rotary classifier characterized in that an introduction part capable of suctioning and removing floating matter is provided near the water surface in the scooping region. 2. Claim 1, wherein the rotating drum is equipped with a spiral blade on the inner circumferential surface of the drum that transports the settled sand toward the sand sampling port, and a plurality of raking blades arranged radially. rotary classifier. 3. The rotating drum is provided with an elastic ring forming a part thereof, and raking blades are provided radially on the inner periphery of the elastic ring, and an impact member that repeatedly impacts the elastic ring is provided. A rotary classifier according to claim 1 or 2, which is a rotary classifier. 4. The second aspect of the present invention, wherein the introduction part is a pipe having a suction port opened near the surface of the rotary drum and below the liquid level on the sediment scooping side.
The rotary classifier described in item 3 or item 3. 5. Claim 4, wherein the introduction part is flat and has a suction port formed in a funnel pipe, and the funnel pipe is connected to a pipe including a jet water supply part and an ejector. The rotary classifier described. 6. The rotary classifier according to claim 4 or 5, wherein the introduction section comprises a piping system that has a differential user piping having a jet water nozzle and supplies pressure water to the jet water nozzle.