JPH11280043A - A dust remover with a rake that has a large dust rejection member - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent clogging of large-sized dust in a dust removal facility in a post-process of a dust remover with a rake. A bar screen (2) installed in a large waterway (3).
A rake 5 for picking up dust caught by the bar screen 2 is provided on the front surface of the rake 5 and a large right-angled triangular dust refuse is provided from the front to the back of the rake 5 and has a slope of an upward slope. A member 19 was provided, thereby rejecting the scraping of large-sized refuse. As a result, the clogging of large-sized refuse was prevented while using a conventional refuse carrying-out facility in the post-process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover with a rake having a large-size dust rejection rejection member for use in rivers, sewage and seawater screens, and the like.

[0002]

2. Description of the Related Art As is well known, there is an operation called "screening" for separating coarse solids and contaminants in water. In the field of use and wastewater, the screen is used for water intake and seawater intake. It is used to remove coarse solids in the sewage and wastewater treatment facility inlets, pumping station inlets and waterways in urban areas, etc.
Its purpose is to protect machinery such as a subsequent pump, prevent clogging of piping and the like, facilitate a water treatment process, and prevent water pollution.

[0003] One of the screens is a bar screen, which is used, for example, for industrial and waste water.
The openings are 10 to 75 mm, and are usually used for lake water, seawater intake, sewage treatment plant inlet, pumping station inlet, fishery treatment processing, food processing wastewater treatment, and the like.

[0004] The coarse solids separated and captured by the bar screen are called screen debris, and in a sewage treatment plant, the amount thereof is 0.1 mm per 1,000 m ^{3 of} sewage.
It is in the range of 005 to 0.01 m ³ , but it is said that it may reach several times in heavy rain.

[0005] Further, it is said that a large solid matter which cannot be expected at the time of design often flows into a screen provided at an inlet of a rainwater drainage pumping station.

[0006] By the way, a type of bar screen with a rake is such that flat steels are vertically arranged at regular intervals.
At the front of a bar screen formed in a grid shape (referred to as a vertical bar screen), a scooping device for screen scum (also referred to as dust or sieve in this specification), that is, a rake is provided. In this dust removing device, the lifting device is of a continuous type (for example, Japanese Patent Publication No.
No. 726, Japanese Utility Model Publication No. 5-19372) and an intermittent type (for example, see Japanese Utility Model Publication No. 59-30032).

[0007] The traveling screen is provided with a carrier chain wound between a foot sprocket rotatably provided in an intake channel and a head sprocket provided above the bar sprocket. This is a dust remover to which a basket constituted by a rack is attached. This bar rack is provided with a slit filter as a receiving tray (for example, Japanese Utility Model Publication No. 4-44660).

On the other hand, when the width of the waste / water channel in which these screens are provided is large, that is, in the case of a large-sized / waste water channel, the width of the rake or the basket is large, and the ability to lift dust is reduced. Increases, but unloads scraped garbage
The garbage unloading equipment in the post-process to be treated is still configured as conventional equipment.

Further, as described above, a bar screen with a rake is used.
At the time of designing the plant, if large solids, which were much more than expected, flowed in, they were going to pick it up and carry it out at a post-process garbage discharge facility.

For example, in the front sectional view of FIG. 3, the barbed screens 51 with rakes are provided in three intake channels 50 (partially omitted) and stand substantially vertically. A bar screen 52 is provided, a pair of left and right carrier chains 53 and 53 provided on both sides of the bar screen 52, and supported by these carrier chains 53. ., A pair of head sprockets 55, 55 on the drive side around which these carrier chains 53 are wound, and a drive shaft 56 connecting these head sprockets 55. And a drive device 57 for driving the drive shaft 56.

The garbage discharge facility in the post-process is configured as follows.

The dust captured by the bar screen 52 is
It is picked up by a rake 54 traveling at about 5 m / min, is scraped off by a wiper (not shown) at a point around a head sprocket 55 on the driving side, and falls into a shoe (not shown). -It falls on the horizontal belt conveyor 58 running underneath and is carried out.

The end of the horizontal belt conveyor 58 faces a connecting pit (trash pit) 59, and dust is temporarily stored therein, and the connecting pit 59
The lower end of the inclined conveyor (climber conveyor) 60 faces, and the dust in the connecting pit 59 is carried out and intermittently loaded on the 2-ton dumper 61.

In the garbage unloading facility in the post-process, large garbage (such as driftwood, refrigerators and bicycles) is captured by the bar screen 52 during heavy rain, for example, and the large garbage falls onto the horizontal belt conveyor 58. Then, the large-sized dust is successively packed in the transfer pit 59, so that the transfer cannot be performed on the inclined conveyor 60, which may hinder the operation of the bar screen 52. .

Of course, the same applies to the case where the vehicle is transferred from the horizontal belt conveyor 58 to another horizontal belt conveyor (not shown) orthogonal to the horizontal belt conveyor, and large trash is caught or clogged at the transfer portion, making it impossible to carry out.

As described above, the conventional garbage unloading equipment in the general post-process is not particularly configured to unload large trash without any trouble.

Therefore, for example, in a post-process garbage unloading facility in which two horizontal belt conveyors are provided at right angles,
In the frame of the subsequent horizontal belt conveyor, a roller facing the front of the exit of the previous horizontal belt conveyor is provided so that the roller axis direction is orthogonal to the unloading direction of the previous horizontal belt conveyor. Refuse to put garbage, for example, long driftwood on this roller and carry it out by a horizontal belt conveyor at the subsequent stage, remove it from the transport path, and prevent clogging of long driftwood at the transit part. (See Japanese Utility Model Publication No. Sho 62-1305).

[0018]

However, the garbage unloading equipment in the post-process of the proposed method can be applied to large-sized dust such as long driftwood, but it is not suitable for removing large-sized angular dust such as refrigerators and bicycles. It is not applicable, and even if the dust is only long driftwood, if the other large screen dust adheres to the screen dust, the roller will be dirty and will not rotate. In addition, if there is no space for storing large-sized refuse that has been rejected / removed to the horizontal belt conveyor at the subsequent stage, this transit part will eventually become clogged, and furthermore, this transit part will require workers There was a problem that the monitoring of the equipment was required.

Therefore, the present invention aims at creating a post-process garbage unloading facility without such problems by changing the way of thinking and eliminating the problems. It is intended to be easily applied to other facilities.

[0020]

In order to achieve the above object, the present invention provides: 1) a screen installed in a waterway;
By providing a member for rejecting large-sized dust on a rake for scraping dust captured by the screen, the rejection of large-sized dust was refused, and the large-sized dust was prevented from being clogged in the garbage discharge facility in a later process. A dust remover with a rake having a large-size dust rejection member, and 2) a dust remover having a rake.
The gist of the present invention is a dust remover with a rake having a large dust scraping refusal member in which the large dust scraping refusal member is a plate piece having an upwardly sloping edge from the front to the rear of the screen. Things.

Therefore, the present invention includes the following embodiments.

The large water channel of claim 1 is used as a water intake channel for a power plant or a drainage channel in an urban area, and the dust remover with a rake is used as a bar screen with a rake to scrape large refuse flowing in during heavy rain. It refuse to be lifted to prevent the operation of condensers and pump stations, eliminate power outages, and facilitate drainage.

[0023] The large-sized refuse according to claim 1, which flows into a normal waterway during heavy rain, or that cannot be treated by a garbage discharge facility in a later process.

Applicable to general dust removers with a rake.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a side view of an essential part of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A-A of FIG.

A bar screen 1 with a rake according to an embodiment of the present invention is installed at an inlet of a pump station of a rainwater drainage channel or an inlet of a sewage treatment plant in an urban area, and is provided with a seawater screen. It is convenient to install large garbage (long driftwood, bicycles, tires, home appliances, etc.) where heavy storms and typhoons sometimes flow in.
The garbage unloading equipment in the post-process may be the above-mentioned conventional one.

That is, the width of the water channel is expanded to, for example, 10 m from the conventional width of 6 m, and as a result, the rake width of the rake screen in the multi-system water intake channel is expanded accordingly. It will be convenient.

In FIGS. 1 and 2, the main bar screen 2 is set up in the intake channel 3 so as to be orthogonal to the flowing water and slightly inclined (downstream). This main bar screen 2
A pair of right and left carrier chains of a back-down type are provided on both sides of the rear surface. The rakes 5, 5,... Are supported on the carrier chains 4 at predetermined intervals in the vertical direction. I have.

These carrier chains 4 are engaged with a driving-side head sprocket (not shown), are guided by a chain guide rail 6, and run slowly. The chain guide rail 6 is fixed to a mounting plate 8 attached to a channel wall 7.

The main bar screen 2 comprises flat bars 2a, 2a
are arranged side by side at regular intervals via spacers 9 penetrating through bolts. Further, these flat steels 2a are fixed to the cross beam channel material 10 and are formed in a lattice shape as a whole. I have.

The channel member 10 is fixed to a bracket 11 projecting from the mounting plate 8 by bolts 12.

An auxiliary screen 14 is provided for capturing dust passing through between the lower end of the main bar screen 2 and the water channel bottom 13.

Although the above-described bar screen 1 with a rake has a dimensional difference, it has a conventional general structure as shown in FIG. 3, but in this embodiment, in particular, the rake 5 It is configured as follows.

That is, the rake 5 is composed of an H-shaped steel member 16 fixedly supported by a pair of right and left carrier chains 4 via an angle member 15 and a bolt, and an H-shaped steel member 16.
Claw plate 18 fixed to the front surface (the side of the rake of the rake) and having comb-shaped rake claws 17, 17,.
The rake 5 is provided on the claw plate 18 at a predetermined interval in the longitudinal direction of the rake 5 so as to be capable of inverting, and has a slope edge (a hypotenuse of a triangle, The oblique side may be formed into an arc shape, a quadratic curve shape, or a trapezoidal upper side).
….

The magnitude of the upward gradient from the front to the rear is set to an angle greater than the angle of repose of so-called large dust, considering that the main bar screen 2 is slightly inclined rearward. .

The large dust refuse rejection plate 1 is placed on the claw plate 18.
In order to provide the invertible 9, it is attached by a hinge (not shown), and it is raised only when heavy dust flows in due to heavy rain, and is turned down after heavy rain. Of course, it may be always standing.

Since the bar screen 1 with a rake as described above is used, when large dust enters due to a typhoon or heavy rain, the large dust rejection plate 19 is erected to reject the large dust. Therefore, there is no inconvenience in the garbage unloading equipment in the post-process that performs the automatic operation, and the large garbage is temporarily retained in the water channel 3, and after heavy rainfall or the like has elapsed, the large garbage scraping prevention plate 19 is laid down. It is advisable to scoop up the remaining large refuse and remove it manually on a stall or the like.

Although the embodiment has been described with reference to the bar screen 1 with a rake, the present invention is not limited to this, and the traveling screen basket may be constituted by a rake. Applicable.

The rake 5 is not limited to the claw plate 18, and may be a beam body having a rake receiving portion provided with a front rake portion and a rearward-raised claw when raised. Good.

The large-sized dust in the present invention means a large-sized dust in a normal post-process dust discharging facility, which causes trouble.

[0042]

According to the present invention, since the rake of the dust remover is constituted by a rake having a member for rejecting large-size dust, the rejection of large-size dust that has flowed into the waterway is rejected, and the post-process is performed. It does not hinder the garbage discharge facility. Therefore, there is no need to worry about automatic driving even temporarily, such as during heavy rain, and reliability can be imparted to the dust remover.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line A-A in FIG.

FIG. 3 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 ... bar screen with rake, 2 ... main bar screen,
3: Intake channel, 5: Rake, 19: Large refuse scraping rejection plate

Claims (2)

[Claims] 1. A large dust refusing rejection member is provided on a front surface of a screen installed in a waterway on a rake for scraping trash caught by the screen, thereby rejecting the large dust from being raked. A dust remover with a rake having a large dust rejection member, wherein the large dust is prevented from being clogged in a dust removal facility in a post-process. 2. A large-sized dust rejection rejecting member according to claim 1, wherein the large-size dust rejection rejecting member is a plate piece having an upwardly sloping edge from the front to the rear of the screen. Dust remover with key.