JPH0522623U - Dust removal bar screen - Google Patents

Abstract

(57) [Abstract] [Purpose] A rake can be brought into contact with the bar screen surface easily and accurately, and when the rake operates, it does not displace from the bar screen surface and efficiently scavenge dust. (EN) Provided is a dust-removing bar screen capable of capturing even fine dust. A dust removing bar screen for a water channel, comprising a plurality of vertical bars arranged at predetermined intervals, wherein rake guide plates are provided at both ends of the bar screen.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dewatering bar screen for waterways, and more particularly to a bar screen that can easily remove dust collected on the screen surface and can also remove fine dust.

[0002]

[Prior Art]

 Conventionally, suspended solids in water that have been introduced into irrigation canals, water treatment plants, sewage treatment plants, etc. are trapped on the inclined bar screen surface for blocking dams provided in the canals, and then accumulated on the screen. Etc. are scraped up by a scraping device called a rake that moves up and down the screen surface and discharged to the outside. There are various types of rakes as described above, such as a mechanism for scraping up by rubbing the screen surface and a mechanism for inserting a nail into the gap of the screen bar to lift up. It is an important issue to be able to scrape dust and dirt trapped and accumulated on the surface with a rake, and to remove it reliably.

[0003]

[Problems that the device is trying to solve]

 However, when scraping dust and the like trapped and accumulated on the bar screen surface with the rake, the rake may be shaken from side to side and may not come into good contact with the bar screen surface. In such a case, there is a problem that the dust on the rake cannot be captured well by the rake, or the dust falls off from the side of the bar screen while the rake is rising, so that the dust cannot be scraped up efficiently. .. In addition, when inserting the rake tip into the gap between the bars of the bar screen and lifting it up, when the rake is brought into contact with the screen surface, the claw hits the bar and the rake claw is accurately inserted between the bars. It was difficult to do so, so I could not narrow the gap between the bars. As a result, there is a problem that it is difficult to capture the fine suspended dust. Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, to allow the rake to abut the berth screen surface easily and accurately, and to prevent the rake from deviating from the surface of the bar screen when operating. The present invention is to provide a dust-removing bar screen that is capable of efficiently scraping up dust, and is capable of capturing even fine dust.

[0004]

[Means for solving problems]

 The above object is achieved by the present invention described below. That is, the present invention is a dust removing bar screen for a water channel in which a large number of vertical bars are installed at predetermined intervals, characterized in that rake guide plates are provided at both ends of the bar screen.

[0005]

[Action]

 As a result of diligent study of the above problems of the prior art, the present inventor found that if rake guide plates are installed at both ends of the dewatering bar screen for a waterway, the rake is lowered and brought into contact with the screen surface. Even if it moves to the left or right to some extent, it can be accurately contacted with the bar screen surface, and the rake does not laterally shake or dust is spilled from the side of the rake even when dust is picked up. In addition, even if the rake laterally shakes, the guide plate can guide it to the correct position, so even if the bar gap is narrowed, the rake claw can be inserted accurately into the bar gap without hitting the bar. As a result, the gap between the bars can be made narrower, and therefore fine dust can also be captured.

[0006]

【Example】

 The present invention will now be described in more detail with reference to the preferred embodiments shown in the drawings. FIG. 1 is an overall perspective view showing a usage state of the dust removing bar screen A of the present invention. Here, 1 is a large number of parallel bars constituting a bar screen, 2 is a rake, and 3'is a rake guide plate. FIG. 2 is a partially enlarged view of the cross section of the dust removing bar screen of the present invention. As shown in FIGS. 1 and 2, the dust removing bar screen A of the present invention is characterized in that rake guide plates 3 and 3'are provided at both ends in the longitudinal direction thereof. The bar screen A itself of the present invention may have the same structure as that of a conventionally known bar screen, and a large number of bars 1 are vertically arranged in parallel with a predetermined interval, and a large number of bars 1 are provided therebetween. Usually, a bar 4 is provided for fixing and strengthening the wires, but a large number of bars are made of steel wire or piano wire with high tensile strength, and a sturdy frame is used around these wires. In the case where (not shown) is provided and each bar is held in a tensioned state, the bar fixing bar as described above is not always necessary. In this case, the weight of the screen can be reduced and the bar can be reduced. Can be made even narrower to about 0.5 mm, and it does not become an obstacle when the dust is lifted up by the rake. Furthermore, these bar screens may be partially submerged or may be entirely submerged, and are not particularly limited.

The rake guide plates 3 and 3'provided at both ends of the bar screen A may be formed of a strong material such as flat steel similar to a general bar screen forming material. The shape and thickness of the rake 2 may be any shape or thickness as long as the rake 2 can be accurately guided and raised on the bar screen surface without swinging to the left or right. In a preferred embodiment of the present invention, as shown in FIG. 2, the guide plates 3 and 3'are installed at both ends of the bar screen so as to be slightly open above the surface of the bar screen. By doing so, when the rake 2 is lowered and brought into contact with the screen surface, the rake 2 is guided by the guide plates 3 and 3 ′ even if the position of the rake 2 is slightly deviated, and the rake 2 is accurately positioned on the screen surface. Abut. It is preferable that the guide plates 3 and 3 ′ are opened to the outside by about 5 to 30 ° from the position perpendicular to the bar screen surface. By doing so, the rake 2 is guided accurately, and it is also effectively prevented that the dust is laterally dropped from the screen surface when the dust is picked up by the rake 2.

Further, when the dust removal bar screen of the present invention is installed in a water channel in which sand also flows at the same time, as shown in FIG. 3, the sand removal is larger than the gap formed by a large number of bars 1 at the lower end of the screen. It is preferable to provide the holes 5. That is, in the case of the conventional bar screen, sand is also washed away at the same time in the waterway where the flow is relatively fast, and such sand accumulates at the lower end of the berth screen, which not only hinders the water flow but also causes the sand pool to rake. Although it may be prevented from accurately abutting on the screen surface, the present invention solves such a problem. The sand removing holes 5 may have any shape as long as they are larger than the gap between the bars. For example, as shown in FIG. 3, the number of bars 1 at the lower end of the screen may be smaller than that at the upper part to form the sand removing holes 5. Good.

[0009]

[Effect of the device]

 As described above, in the dust removing bar screen of the present invention, the rake can be surely guided and brought into contact with the bar screen surface, so that dust can be captured and scooped up accurately.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a usage state of a dust removing bar screen of the present invention.

FIG. 2 is a partially enlarged view of a cross section of the dust removing bar screen of the present invention.

FIG. 3 is a partial enlarged view of a lower portion of the dust removing bar screen of the present invention.

[Explanation of symbols]

 A: Bar screen 1: Bar 2: Rake 3, 3'guide plate 4: Crosspiece 5: Sand removing hole

Claims (3)

[Scope of utility model registration request] 1. A dust removing bar screen for a water channel, wherein a plurality of vertical bars are installed at predetermined intervals, wherein rake guide plates are provided at both ends of the bar screen. 2. The dust-removing bar screen according to claim 1, wherein the guide plate is provided so as to be opened slightly outward from a right angle with respect to the bar screen surface. 3. The dust removing bar screen according to claim 1, wherein a sand removing hole is provided in a lower portion of the bar screen.