JP4846687B2 - Bar screen type automatic dust remover - Google Patents

Description

  The present invention relates to a bar screen type automatic dust remover for both coarse and fine dust, and in particular, a bar screen type capable of separating and discharging garbage captured with a fine mesh width and garbage captured with a coarse mesh width. The present invention relates to an automatic dust remover.

  Conventionally, in sewage treatment plants and sewage pumping stations, a coarse bar screen is installed upstream of the sand basin, and a fine dust bar screen is installed in the subsequent stage. It was processed with the system.

  That is, since the amount of dust captured by the coarse bar screen is small and large, it is generally put into the storage hopper without performing a process such as cleaning.

  In addition, the dust collected by the fine dust bar screen has been put into the storage hopper after the cleaning process in order to reduce the volume and handle it in a sanitary manner.

  Specifically, coarse waste is conveyed from a coarse bar screen to a storage hopper by a belt conveyor, while fine dust is conveyed from the fine dust bar screen to a washing machine by a running water trough (belt conveyor) for processing. After that, it is further processed by a separator and a dehydrator and then transferred to a storage hopper.

  Therefore, existing washing machines, separators, and dehydrators are often designed on the assumption that there is no coarse waste.

  However, recently, a coarse and fine dust bar screen type automatic dust remover has been formed by integrally forming a coarse screen and a fine dust bar screen so that dust collected by these dual-purpose bar screens can be lifted with a single rake. Has also been proposed by the present applicant (see Patent Document 1 below).

When dust in inflowing water is captured using such a bar screen type automatic dust remover, coarse dust and fine dust captured at each mesh width for coarse and fine dust are mixed again at the discharge port. Thus, in the latter stage of the washer, separator, and dehydrator, the treatment may be hindered by coarse waste.
Japanese Patent No. 3768518

  In view of the problems of the conventional coarse screen / fine dust bar screen type automatic dust remover, the present invention separates and discharges dust collected with a fine mesh width and waste captured with a coarse mesh width. An object is to provide a bar screen type automatic dust remover that can be used.

  In order to achieve the above object, the bar screen type automatic dust remover according to the present invention includes a plurality of screen bars of a fine dust bar screen disposed between screen bars having a wide mesh width of a coarse bar screen, and a coarse screen. A bar screen with the front end surface of the bar screen projecting forward from the front end surface of the fine dust bar screen, and the coarse rake and fine dust meshing with the mesh width of the coarse bar screen and the fine dust bar screen In a bar screen type automatic dust remover equipped with a rake for scraping and discharging bar screen dust, the coarse bar screen is extended from the fine dust bar screen for a required length on the ground. An apron is provided from the end of the dust bar screen to the middle of the extended coarse bar screen, and below the end of the apron. The fine dust collection section for collecting the dust formed, characterized in that a coarse dust collecting unit for collecting the coarse dust under the end of the coarse bar screen.

  In this case, an unloading water nozzle for spraying water from above the coarse bar screen can be provided in the fine dust collecting section.

  According to the bar screen type automatic dust remover of the present invention, a plurality of screen bars of the fine dust bar screen are arranged between the wide screen screen bars of the coarse bar screen, and the front end of the coarse bar screen is arranged. It has a bar screen whose surface protrudes forward from the front end face of the fine dust bar screen, and a coarse rake and fine dust rake that meshes with the coarse bar screen and the fine bar screen width. In a bar screen type automatic dust remover equipped with a rake that lifts and discharges the dust on the bar screen, the coarse bar screen is extended longer than the fine dust bar screen on the ground, and the fine dust bar screen Fine dust that collects fine dust under the end of the apron while providing an apron from the end to the middle of the extended coarse bar screen Since the coarse part is provided under the terminal part of the coarse bar screen and the coarse part is collected, the fine dust swept up by the rake falls from between the coarse bar screens at the end part of the apron. The coarse dust can be collected by the fine dust collecting unit, and the coarse dust can be collected on the coarse bar screen as it is, dropped at the end of the coarse bar screen, and collected by the coarse dust collecting unit.

  In this case, by providing the unloading water nozzle that sprinkles water from above the coarse bar screen in the fine dust collecting section, it is possible to promote the fall of the fine dust.

  Embodiments of a bar screen type automatic dust remover according to the present invention will be described below with reference to the drawings.

  1 to 3 show an embodiment of a bar screen type automatic dust remover of the present invention.

  In this bar screen type automatic dust remover, a plurality of screen bars of the fine dust bar screen 2 are disposed between the wide screen screen bars of the coarse bar screen 1, and the front end surface of the coarse bar screen 1 is disposed. Projecting forward from the front end face of the fine dust bar screen 2, the coarse rake 31 and the fine dust rake meshing with the coarse bar screen 1 and the fine dust bar screen 2. 32 and a rake 3 for scraping and discharging the dust on the bar screen.

  In this bar screen type automatic dust remover, the coarse bar screen 1 is extended from the fine dust bar screen 2 for a required length on the ground and extended from the end of the fine dust bar screen 2. An apron 4 is provided partway through the screen 1, a fine dust collecting part 5 for collecting fine dust S 1 is provided under the end of the apron 4, and coarse dust S 2 is collected under the end of the coarse bar screen 1. A coarse waste collection unit 6 is provided.

  The rake 3 is driven by a chain 72 installed on the upper and lower main body sprockets 71 and circulates around the coarse / fine dust combined bar screen, and also sweeps up dust on the front side of the coarse / fine dust combined bar screen.

  The rake 3 has a coarse rake 31 and a fine dust rake 32 meshing with the coarse / fine dust combined bar screen, and the back of the front screen 8 standing at the bottom of the water channel is provided. A front screen rake 33 that meshes with the mesh width is provided.

  The coarse bar screen 1 is made of a strip-shaped flat steel wider than the fine dust bar screen 2. For example, 4 to 5 fine dust bar screens 2 are provided between the coarse bar screens 1 arranged at intervals of 10 cm. The coarse and fine dust bar screen is formed by disposing and projecting the front end face of the coarse bar screen 1 to the front position from the front end face of the fine dust bar screen 2.

  The coarse / fine dust combined bar screen is installed in the water channel together with the front screen 8 erected on the bottom of the water channel.

  In the above-ground part above the water channel, only the coarse bar screen 1 is extended for a required length, and the apron 4 is extended from the terminal part of the fine dust bar screen 2 to the middle of the extended coarse bar screen 1. Laying down prevents the fine dust S1 from falling.

  Thereby, the fine dust S1 captured with the fine mesh width is swept up along the apron 4 by the rake 3.

  On the other hand, a fine dust collecting part 5 for collecting fine dust S1 is provided under the terminal end of the apron 4, and a coarse dust collecting for collecting coarse dust S2 under the terminal part of the coarse bar screen 1 is provided. Part 6 is provided.

  The fine dust collecting unit 5 is provided with an unloading water nozzle 9 for spraying water from the coarse bar screen 1 so as to encourage the fine dust S1 to fall from the rake 3.

  In this embodiment, the fine dust S1 dropped from the rake 3 is collected and transported by a running water trough.

  Further, the coarse dust S2 dropped from the end portion of the coarse bar screen 1 is collected and conveyed by a belt conveyor provided therebelow.

  Next, the operation of the bar screen type automatic dust remover of this embodiment will be described.

  In this bar screen type automatic dust remover, the channel has a coarse / fine dust bar screen composed of a coarse bar screen 1 and a fine dust bar screen 2.

  On the other hand, on the ground part, the apron 4 is first provided without the fine dust bar screen 2, so that the fine dust S <b> 1 captured with the fine mesh width is scraped along the apron 4 by the rake 3. It is done.

  Further, when the rake 3 is used to lift up the apron 4, the fine dust S1 that has been lifted up falls by its own weight and is discharged to the fine dust collecting unit 5 such as a running water trough.

  Here, an unloading water nozzle 9 may be provided, and the nozzle water may promote the fall of dust.

  Thereafter, when the rake 3 is further swirled, the coarse bar screen 1 disappears, and the coarse dust S2 captured with the coarse grain width falls by its own weight and is discharged to the coarse garbage collection unit 6 such as a belt conveyor.

  As described above, the bar screen type automatic dust remover of the present embodiment can divide and collect the dust captured at each mesh width.

  As mentioned above, although the bar screen type automatic dust remover of the present invention has been described based on the embodiments thereof, the present invention is not limited to the configurations described in the above embodiments, and may appropriately be used without departing from the spirit of the present invention. The configuration can be changed.

  Since the bar screen type automatic dust remover of the present invention has the characteristic of separating and discharging the dust captured with the fine mesh width and the dust captured with the coarse mesh width, both the coarse and fine dust are used. It can be widely used suitably for the application of a bar screen type automatic dust remover.

It is sectional drawing which shows one Example of the bar screen type automatic dust remover of this invention. 1 is a partial cross-sectional view of FIG. 1, (a) is a cross-sectional view of A, (b) is a cross-sectional view of B, (c) is a cross-sectional view of C, (d) is a cross-sectional view of D, and (e) is a cross-sectional view of E. It is a perspective view which shows the screen part of the same bar screen type automatic dust remover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bar screen for coarse grain 2 Bar screen for fine dust 3 Rake 31 Rake for coarse grain 32 Rake for fine dust 33 Rake for front screen 4 Apron 5 Fine dust collection part 6 Coarse dust collection part 71 Main body sprocket 72 Chain 8 Front screen 9 Unloading Water nozzle S1 Fine dust S2 Coarse garbage

Claims (2)

  Multiple screen bars of the fine dust bar screen are arranged between the wide mesh screen bars of the coarse bar screen, and the front end surface of the coarse bar screen is positioned forward of the front end surface of the fine dust bar screen. A bar screen that protrudes into the bar screen, and a coarse rake and a fine dust rake that mesh with the coarse bar screen and the fine dust bar screen, and rakes and discharges the dust on the bar screen; In a bar screen type automatic dust remover equipped with a coarse bar screen, the coarse screen is extended longer than the fine dust bar screen on the ground, and the middle of the extended coarse bar screen extends from the end of the fine dust bar screen. And a fine dust collecting part for collecting fine dust below the terminal end of the apron. Bar screen type automatic dust remover, characterized in that a coarse dust collecting unit for collecting the coarse dust in.   2. The bar screen type automatic dust remover according to claim 1, wherein the fine dust collecting part is provided with a water nozzle for unloading which sprays water from above the coarse bar screen.

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