JPH04155005A - Refuse removing device - Google Patents

Abstract

PURPOSE:To exactly remove refuse in passing flow by providing combing claws and a scooping claw bent on the running direction side on a rake for scraping up refuse, and setting the fitting pitch of the to a chain under the length of the parallel part of a guide rail for a chain. CONSTITUTION:A bar screen 1 is held with both side guide rails 4 a little inclining against the bottom part of water passage, and rakes 2 having combing claws and scooping claws on the opposite side of the former and bent on the running direction are fitted to a ring-like chain 3 along the bar screen 1. The pitch is set under the length of the parallel part 5 of the guide rail 4 in parallel with the bottom part of a water passage, and a refuse stop member 6 is provided on the upper part of the parallel part 5. The chain 3 is turned over at the upper and lower parts and circulatingly run with a motor through a drive sprocket on the upper turning over part. Hereby, at least one rake 2 always exists to enable to obstruct passing flow of refuse.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust removal device for mechanically removing dust, coarse solids, etc. captured by a bar screen provided in a waterway.

(Prior art) A waterway dust removal device using a bar screen is, for example, as seen in Japanese Patent Publication No. 59-9690, an endless rake installed along a bar screen installed in a waterway to pick up dirt. There is a model in which a chain is reversed at the top and bottom and guided and held by a guide rail so that it can run, and the captured dirt is scraped up and discharged as it rises along the front of a rake or bar screen.

In this type of dust removal device, the rake that runs together with the chain is composed of a comb-shaped combing claw inserted into the bar gap of the bar screen and a comb-shaped raking claw protruding from the opposite side. While the rake is running, the combing pawl combs out the garbage caught on the bar screen, and the raking pawl scrapes up the garbage that is about to flow through the bottom of the waterway while passing the bottom of the waterway.

Further, a bar screen equipped with such a rake and having an L-shape with one side parallel to the bottom of the waterway is also known from Japanese Patent Laid-Open No. 79142/1983.

[Invention or problem to be solved]

However, in the former type of conventional dust removal device, the scraping claws that scrape up the debris flowing at the bottom of the waterway are flat, so the debris slides down when turning upward, making it impossible to scrape up the debris sufficiently. The drawback was that the waste that had been blocked would flow downstream. To prevent this, an auxiliary screen is installed upstream of the bar screen at the bottom of the waterway to guard it, but even then, debris often passes through the gap between the bar screen and the auxiliary screen, so the auxiliary screen is made to swing. Some attempts have been made to completely block the blockage by keeping the bar screen in constant contact with the bar screen, but this is difficult because the auxiliary screen is buried in sand, and it is difficult to prevent muddy water from entering the swing shaft support. When a malfunction occurs, it is difficult to detect and repair it because it is installed underwater.

In addition, even in the latter type of conventional dust removal device, since the claws for scraping up the dirt flowing at the bottom of the waterway are flat, it is easy for the dirt to slide down when turning upwards. Although it prevents the chain from flowing downstream, there is a high risk that it will gradually accumulate and eventually become inoperable.Furthermore, the sprocket installed at the underwater reversal part of the chain will rust, making it difficult to operate smoothly. Furthermore, since the bar screen is L-shaped, it was not easy to manufacture.

The present invention solves these conventional problems and provides a dust removal device with a simple structure that can accurately remove debris flowing through a waterway without the need for an auxiliary screen or the like. It is something.

[Means to solve the problem]

The present invention provides a dust removal device in which an endless chain 3 equipped with a rake 2 for scraping up dust from a covered portion along a bar screen l is guided and held by a guide rail 4 so that it can be reversed at the top and bottom and run. The rake 2 is composed of a comb-shaped combing pawl a that is inserted into the bar gap of the bar screen l and runs, and a combing pawl stub that is curved in the running direction on the opposite side of the combing pawl a, and the chain A parallel part 5 of the guide rail 4 parallel to the bottom of the waterway is formed at the lower inverted part of 3, a dust stopper member 6 is provided on the upper part of this parallel part 5, and the rake 2 is attached to the chain 3 so that the pitch is parallel. This dust removal device is characterized in that the length of the portion 5 is less than or equal to the length of the portion 5.

[For production]

The dust removal device of the present invention is guided and held by a chain 3 or a guide rail 4 by a drive device and travels in circulation, and the rake 2 also travels accordingly.

When the rake 2 running downward on the opposite side of the bar screen l comes to run on the parallel part 5 at the bottom of the guide rail 4, the scooping pawl of the rake 2 allows the water to flow through the bottom of the waterway below the bar screen l. It will surely catch the garbage that it is trying to pick up, reach the front, turn around and go up, but because the scooping claw is curved in the direction of travel, the captured garbage will be scooped up without slipping down. . Furthermore, since the pitch of the rake 2 to the chain 3 is less than the length of the parallel part 5, when one rake 2 turns in front of the parallel part 5, the following rake 2 or the parallel part 5 The garbage that is about to flow down the bottom of the waterway is captured by the scooping claw of the rake 2 that follows.

Incidentally, the dust attempting to rise between the guide rails 4 on both sides of the parallel portion 5 is stopped by the dust stopping member 6.

Rake 2 scooped up the garbage at the bottom of the waterway in this way.
reaches the front of the bar screen L, and while ascending, the combing claw a inserted into the bar gap combs out the waste blocked by the bar screen L, and the upper part is inverted while preventing the screen from clogging. The garbage scraped off from the bar screen l and the garbage scooped out from the bottom of the waterway fall into the skirt 15 and are carried out by a belt conveyor 16 or the like.

In addition, if it is a waterway or a river, and the garbage is flowing or bulky, the garbage scooped out at the bottom will have little adhesion to the scooping claw, and will fall easily by reversing the rake 2 at the top. However, in the case of highly adhesive dust, it is preferable to do the following.

That is, as shown in FIG. 2, the horizontal portion 7 of the guide rail 4 is formed at the upper inverted portion of the chain 3, and the horizontal portion 7 is provided so as to scrape off the dirt adhering to the rake 2, as shown in FIG. A rotary wiper 8 is provided between the upper and lower guide rails 4, 4, and is biased in the direction opposite to the running direction of the chain 3 running on the lower side, and as the rake 2 passes, the combing pawl a of the rake 2 and The scooping claw is rotated forward from scraping the entire surface and restored after the rake 2 passes.

It is also preferable to provide a roller 9 so as to come into contact with the front surface of the rake 2 as it rotates to the back side of the rotary wiper 8 to facilitate passage of the rake 2 after scraping.

〔Example〕

Describing one embodiment of the present invention with reference to the drawings, a bar screen 1 in the form of a vertical lattice is provided in the waterway inclined at a slight angle with the bottom of the waterway, and is provided with guide rails provided on both sides. 4, an endless chain 3 attached with a plurality of rakes 2 for scraping up dirt along the bar screen L is rotated in the upper and lower parts so as to run in circulation.
It is designed to be driven by a drive sprocket 10 (see FIG. 2) provided on the upper inversion section. The drive shaft 1) of this drive sprocket IO is rotated by a motor (not shown), and is connected to a chain tensioning device 12.

As shown in FIG. 4, the rake 2 attached to the chain 3 has a comb-shaped combing pawl a that is inserted into the bar gap of the bar screen 1 and runs, and a water channel on the opposite side of the combing pawl a. It is composed of a scooping claw, for example, in the shape of an arc, which is curved to scoop up dirt from the bottom and prevent the dirt from slipping off when turning upward.

As shown in FIG. 1, the lower inverted portion of the guide rail 4 is parallel to the bottom of the waterway, and the gap between the tip of the scooping claw of the rake 2 and the bottom of the waterway is equal to or smaller than the bar gap of the bar screen 1. A parallel portion 5 is formed to prevent dust from rising, and a dust stopping member 6 is provided above the parallel portion 5 to prevent dust from rising. Further, the pitch of the rakes 2 attached to the chain 3 is set to be equal to or less than the length of the parallel portion 5, and at least one rake 2 is always present in the parallel portion 5,
Prevent the circulation of garbage.

In the figure, 13 is an apron provided on the top of the bar screen L, and the rake 2 that runs through the bar screen L
14 is a shaft cover for preventing dust from falling on the drive shaft 1). Further, a skirt 15 is provided near the upper inversion part of the chain 3 to receive debris falling from the rake 2.
The lower part of Scar 1-15 is the belt conveyor 1 for carrying out garbage.
It opens above 6.

In addition, when a wiper is provided to scrape off dirt attached to the rake 2, the horizontal part 7 of the guide rail 4 is formed at the upper inverted part of the chain 3, as shown in the second figure, and the horizontal part 7 of the guide rail 4 is Wiper shaft 1 is placed between the upper and lower guide rails 4 and 4.
A rotary wiper 8 having a rotary wiper 7 is provided. As shown in FIG. 6, the rotary wiper 8 has a wiper main body 8-1 provided with a boss portion 8-1 attached to the wiper shaft 17 at one end.
2 and the wiper claw 8-3 at the other end are separated, and the fourth
As shown in the figure, the wiper shaft 17 is connected to the sprocket 18, and the rotary wiper 8 is moved to the right end in FIG. The wiper claw 8-2 is energized to the indicated position, reversed, and pushed by the rake 2 running below together with the chain 3, so that the wiper claw 8-2 rotates along an arcuate trajectory and attaches to the rake 2. After rake 2 passes, it will be restored to the right end.

It is also preferable to provide a roller 9 on the back side of the wiper body 8-2 so as to be able to come into contact with the rake 2, so that the rotary wiper 8 can smoothly move from the middle part to the upper end part while the rake 2 is running. .

〔Effect of the invention〕

As described above, the dust removal device of the present invention guides and holds an endless chain attached with a plurality of dirt scraping rakes along a bar screen provided in a waterway so that it can run by inverting the upper and lower parts. The rake is equipped with a scooping pawl that scoops out debris blocked by the bar screen and a scooping pawl that is curved in the running direction to scoop up debris from the bottom of the waterway, and a guide of a predetermined length that is parallel to the bottom of the waterway on the reversing part of the chain. Since the rail is provided with a parallel section and at least one rake is always present, the flow of garbage at the bottom of the waterway is reliably blocked, and the garbage is reliably held and scooped out even when the scooping claw rotates and rises.
It eliminates the need for the auxiliary screen installed at the lower part of the upstream side of the conventional bar screen, and in addition, the operation of the bar screen and other items other than the dirt prevention member in the water is facilitated, maintenance and inspection are easy, and manufacturing and installation are also easy. be.

Furthermore, by forming a horizontal part of the guide rail on the upper inversion part and installing a rotary wiper that can scrape off the dirt adhering to the rake, it becomes effective against adhesive dust, and the back side of the rotary wiper By providing rollers, the operation can be further made smoother.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a lower side view;
Fig. 2 is an upper side view, Fig. 3 is an explanatory diagram of the operation of the rotary wiper, Fig. 4 is an explanatory diagram of the structure as seen from Fig. 3 ■-1 arrow, Fig. 5 is Fig. 3 Fig. 3 ■-π line arrow 6 is a perspective view of the rotary wiper. DESCRIPTION OF SYMBOLS 1... Bar screen, 2... Rake, 3... Chain, 4... Guide rail, 5... Parallel part, 6...
... Dust stopper member, 7 ... Horizontal part, 8 ... Rotating wiper, 8-1 ... Boss part, 8-2 ... Wiper body, 8-3 ... Wiper claw, 9 ...Roller, lO
... Drive sprocket, 1) ... Drive shaft, 12...
・Chain tension device, 13...Apron, 14...
Shaft cover, 15...skirt, 16...belt conveyor, +7...wiper shaft, 18...sprocket, 19...chain, a...combing claw, b...scooping claw. Patent applicant Ebara Koki Co., Ltd. Patent applicant
Ebara Corporation Representative Patent Attorney Pharmaceutical
Teacher Minoru Agent Patent Attorney Yori 1) Takatsugu Department Agent Patent Attorney Tadashi Takagi a)
■

Claims (4)

[Claims] (1) Endless chain (3) with multiple rakes (2) attached along the bar screen (1)
In the dust removing device, the rake (2) is inserted into the bar gap of the bar screen (1) and runs on a comb-like combing claw. (a) and a scooping claw (b) that is curved in the running direction on the opposite side of the scooping claw (a), and a guide rail parallel to the bottom of the waterway ( 4), and form the parallel part (5) of this parallel part (
A dust removal device characterized in that a dust stopper member (6) is provided on the upper part of the rake (2), and the pitch at which the rake (2) is attached to the chain (3) is set to be equal to or less than the length of the parallel portion (5). (2) A rotating type in which a horizontal part (7) of the guide rail (4) is formed at the upper inverted part of the chain (3), and this horizontal part (7) scrapes off the dirt attached to the rake (2). The dust removal device according to claim 1, further comprising a wiper (8). (3) Rake (2) on the back side of the rotary wiper (8)
3. The dust removal device according to claim 2, further comprising a roller (9) that can come into contact with the roller. (4) The dust remover according to claim 1, 2, or 3, wherein the curve of the scooping claw (b) is an arcuate shape that scoops the garbage at the bottom of the waterway and prevents the garbage from slipping when turning upward. Device.