JPH02243811A - Dust collector - Google Patents

Abstract

PURPOSE:To eliminate the dead angle and prevent the bite of a rake by providing an endless chain rotating through a driving sprocket in front of both sides of a bar screen provided with rakes, curving the lower part of the bar screen from the vicinity of the road bed to the front side facing upward, and putting it along the road bed. CONSTITUTION:A bar screen 11 is provided facing upward from the road bed (a) of a waterway A, and an endless chain 13 is provided in front of both sides of the bar screen 11, and rakes 14 are fixedly secured on it. Further, a guide groove 15 is formed on a road wall (b) along the running way of the chain 13, and the chain 13 is run along it. The chain 13 is run with a driving machine 20, the rakes 14 are moved in the inserted condition from the lower end of the bar screen 11 extending over full length, and dust and the like are scraped up. Further, the dust and the like are scraped down to a belt conveyor 22 with a scraper 21 and conveyed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a so-called front-descending front-scraping dust remover for removing dust from a waterway.

[Conventional technology and its problems]

As shown in Fig. 5, this type of dust remover has a bar screen 1 installed in a waterway A upward from the roadbed, and a rake 2 is lowered and raised along the front surface of the bar screen 1. When rising, the rake 2 is inserted into the bar screen and runs, and the rake 2 scrapes up the garbage captured by the bar screen 1 and drops it onto the belt conveyor 22.

By the way, as shown in the same figure, the conventional bar screen 1
is straight to the roadbed a, and since the rake 2 is attached to a running chain 4 by upper and lower sprockets 3, it is inserted into the bar screen 1 in an arc near the roadbed a.

For this reason, there is a portion near the roadbed of the bar screen 1 where the rake 2 does not pass through (is not inserted) (portion P in the figure).

On the other hand, the state in which garbage, particularly problematic long plate pieces, are trapped in the waterway A is as shown in FIG. That is, the plate piece W
First, as shown in Figure (a), due to the flow resistance, the flow direction is directed toward the bar screen 1 with its length direction as the flow direction (arrow direction), and as shown in Figure (b), it is directed toward the bar screen 1. After making contact, it turns sideways along it. Next, when the water level decreases, the width direction also follows the bar screen 1, as shown in the same figure (C), and when the water level further decreases, due to the difference in frictional resistance between the entire length of the plate piece W and the bar screen 1, , as shown in FIG. 3(d), the roadbed is in a rising state.

Therefore, in the conventional dust remover, the rising state is the rising state in the blind spot P, so that the rake 2 bites into the plate piece W, as shown in FIG. Ru. If this situation continues,
This will cause the dust remover to malfunction.

For this reason, conventionally, as shown in FIG. 5, a guide plate (stainless steel plate) 5 is provided on the lower front surface of the bar screen 1 along the travel path of the rake 2 to eliminate the blind spot P.

However, in this conventional example, as shown by the chain line in the figure,
In the state where the plate piece W is standing up, the rake 2 still moves the plate piece W
This causes the vehicle to bite into the vehicle, preventing its travel. Also,
Since water does not pass through the guide plate 5, dirt accumulates on the front surface of the guide plate 5, and this deposit prevents the rake 2 from running. This often occurs when the dust remover is used after being stopped for several days.

Furthermore, as shown in Figure 5, there is a settling basin B in front of the dust remover.
is formed and traps sand here.

This invention consists of 1. With the above points in mind, it is an object of the present invention to eliminate the blind spot P and to eliminate rake digging.

[Means to solve the problem]

In order to achieve the above object, in the present invention, in the above-described front-descending front-scraping dust remover, the lower part of the bar screen is curved upward from near the roadbed to the front side, so as to be along the roadbed. Endless chains are installed on both front sides of the bar screen along the entire length of the bar screen, and guide grooves are formed in the road wall along the chain running path in which the chain rollers fit and run, and the chain is wound around the upper part of the waterway. A driving sprocket was provided for the chain, and rakes were provided on the chain at required intervals along its length.

The above-mentioned required interval is appropriately set in consideration of the driving force of the chain and the amount of trapped dirt.

[Effect]

In the dust remover configured in this manner, the chain runs while being regulated by the guide groove via the rollers, so there is no need to provide a sprocket near the roadbed. Therefore, the chain can run smoothly along the curved bar screen.

In addition, since the lower part of the bar screen is curved and follows the roadbed, the rake can be inserted into the bar screen continuously from the roadbed (without blind spots).

Therefore, the driving sprocket allows the chain to
When the rake is inserted into the bar screen and moved upward, the rake moves from the lower end of the bar screen over its entire length, scoops up the captured dirt, and transfers it from the upper end of the bar screen to a belt conveyor, etc. let it fall.

〔Example〕

As shown in Figures 1 to 3, the roadbed a is placed in the waterway A.
A bar screen 11 is provided upward from the roadbed, and the lower end of the bar screen 11 curves upward from near the roadbed a to the front side and disappears along the roadbed a.

As shown in FIGS. 2 and 3, the bar screen 11 is
A plurality of bars 11a are arranged in parallel at intervals in the vertical direction, and are connected by crossbeams 12 to form a single body. A stainless steel plate 17 is provided on the entire surface of the roadbed a at the curved portion (lower end portion) of the bar screen 11.

The bar screen 11 is placed on the front of both sides of the bar screen 11.
An endless chain 13 is provided along the entire length, and six rakes 14 are provided at equal intervals along the length of the chain 13.
is fixed. A guide groove 15 is formed in the road wall along the running path of the chain 13. This guide groove 1
5, as shown in FIG. 2, is formed with steel frame members 15a facing each other and is buried in the road wall.

In the buried state, the body is not exposed to running water (no longer resists running water), so the so-called condition that inhibits running water is removed. A rail 16 is provided along the entire length of the guide groove 15, and the rollers 13a of the chain 13 are rotatably fitted into the rail 16, and the chain 13 runs while being guided by the guide groove 15.

As shown in FIG. 2, the rake 14 has comb-shaped edges on both sides, and fittings 14a are fixed to both ends, and fittings 14b are fixed to the chain 13.
A rake 14 is attached to the chain 13 and connected to the chain 13 via a bolt 14c and a spring 14d. Pol N 4
A fixture 14a is movably fitted into c, and when a downward force (in the direction of the arrow in FIG. etc., the rake 14 moves backward (in the opposite direction of the arrow)
and respond to that force.

The chain 13 reaches the upper part of the waterway A and is wound around a driving sprocket 18 and a guide sprocket 19. When the sprocket 18 is rotated by the driving machine 20, the chain 13 runs and the rake 14 moves around the bar screen 11.
Raise up the collected garbage. A scraper 21 is provided in the vicinity of the drive sprocket 18, and the scraper 21 is always returned to the solid line state shown in FIG. 21, the rake 14 comes into contact with the scraper 21 and advances further, as shown by the chain line in FIG. Belt conveyor 2
The garbage above 2 will be transported to a storage pond, etc.

In the figure, 23 is a counterweight that applies tension to the drive chain 24, 25 is a pick-up that can move the guide sprocket 19 up and down, and by tightening the port 25a at a required position, the required tension is applied to the chain 13. The loosening is prevented by the disc spring 25b.

This embodiment is constructed as described above, and when the chain 13 is driven by the drive machine 20 as shown by the arrow in FIG. , scrape up the dust trapped on the bar screen 11. At this time, as shown by the chain line in FIG. 1, even when the plate piece W is in the upright state, the lower end of the plate piece W is on the bar screen 11, and the rake 14 is in the state of being inserted into the bar screen 11, so the plate piece W The plate piece W is raised by scooping it up without biting into it. When the tip of the lower part of the bar screen 11 along the road surface a is made straight (horizontal), the plate piece W is
It definitely stops at 1.

In this embodiment, sand and the like on the stainless steel plate 17 are also scooped up at the same time.

The dirt, sand, etc. raked up and scooped by the rake 14 are scraped off by a scraper 21 and conveyed to a belt conveyor 22. If sand and the like are scooped up, the settling basin B will no longer be necessary.

This action, for example, causes the chain 13 to run so that the rake 14 reaches the bar screen 11 at approximately 40 second intervals, that is, to clean the bar screen 11 at approximately 40 second intervals, and decelerates as the water level decreases.

During this operation, if an overload is applied to the chain 13 due to the rake 14 biting into the garbage, etc., this is detected and the chain 13 is made to run in the opposite direction (in the direction of the arrow) for a certain period of time, and then is made to run forward again. In other words, normal operation is restored. If an overload is applied during this reverse running or when starting forward running again, the entire dust remover will stop driving and the failure state will be notified by a buzzer or the like. In this state, all drive commands other than manual ones are ignored. Overload detection is performed by employing well-known means such as directly or indirectly detecting the running speed of the chain 13. For example, a powder joint is provided between the drive unit 20 and the reducer, and a powder joint is installed in the vicinity of this joint. A switch is attached and the proximity switch is activated by the deceleration of the joint for detection. Since the powder joint is a flexible joint, it absorbs the impact force during startup.

As shown in FIG. 4, if the curved part of the hearth screen 11 is made longer, the action of scooping up sand etc. by the rake 14 will be improved. If you do that, it will be even better.

(Effects of the Invention) This invention is configured as described above, and the blind spot P is eliminated by the bar screen, so the rake does not dig into the rising dust (board pieces) as in the past. Scrape smoothly.

[Brief explanation of drawings]

Fig. 1 is a cut side view of one embodiment of the dust remover according to the present invention, Fig. 2 is a cutaway plan view of the main part of Fig. 1, Fig. 3 is a rear view of Fig. FIG. 5 is a schematic diagram of a conventional example, and FIGS. 6(a) to 6(d) are explanatory diagrams of garbage capture. 11... Bar screen, 13... Chain, 14... Rake, 15... Guide groove, 18... Drive sprocket, 21・・・・・・
・Scraper, 22...Belt conveyor. (a) (C) Figure 6 (b) (d)

Claims (1)

[Claims] (1) In a dust remover, a bar screen is installed in a waterway upward from the roadbed, and a rake is lowered and raised along the front of the bar screen, and the rake is inserted into the bar screen when rising. The lower part of the bar screen is curved upward from the vicinity of the roadbed to the front side so as to lie along the roadbed, and endless chains are provided along the entire length of the bar screen on both sides of the front of the bar screen, and the road wall is arranged along the chain running path. A guide groove is formed in which the rollers of the chain fit and run, a driving sprocket for winding the chain is provided at the upper part of the waterway, and the rakes are provided on the chain at required intervals in the length direction. Features: Dust remover.