JP2011140875A - Bar screen type dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bar screen type dust collector including coarse-mesh and fine-mesh screens that can cut down a material cost to reduce a manufacturing cost by attaining the common use of material for coarse-mesh and fine-mesh rakes. <P>SOLUTION: The bar screen type dust collector includes a bar screen S comprising the coarse-mesh bar screens 1 disposed at spaces, and fine-mesh bar screens 2 disposed between the coarse-mesh bar screens 1, and a rake 3 comprising the coarse-mesh rake 31 and fine-mesh rake 32 raking and ejecting dust caught by the bar screen S. In the rake 3, the coarse-mesh rake 31 formed of horizontally disposed plate members, and the fine-mesh rake 32 formed of a plurality of vertically disposed plate members, are constituted to be divided in the longitudinal direction of a rake frame 30, and the dividedly constituted coarse-mesh rake 31 and fine-mesh rake 32 are mounted to the rake frame 30 using fixing means 30a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bar screen type dust remover, and more particularly to a bar screen type dust remover equipped with a coarse bar screen and a fine bar screen, which can reduce the manufacturing cost while maintaining required performance such as strength. It is.

  Conventionally, in sewage treatment plants and sewage pump stations, a coarse bar screen type dust remover has been installed upstream of the sand basin, and a fine bar screen type dust remover has been installed downstream thereof. The bar screen of each bar screen type dust remover Because the size and properties of the garbage caught in the process differed, they were treated by different systems.

  On the other hand, a bar screen type dust remover provided with a coarse bar screen and a fine bar screen has been proposed by the present applicant and put into practical use (for example, see Patent Document 1).

  As shown in FIG. 11, the bar screen type dust remover includes a coarse bar screen 1 arranged at intervals and a fine bar screen 2 arranged between the coarse bar screens 1. Are arranged so that the front end face of the coarse screen bar 11 constituting the fine bar screen 2 protrudes forward from the front end face of the fine screen bar 21 constituting the fine bar screen 2 (upstream of the water flow). 11 is formed to be thicker than the screen thickness of the fine screen bar 21 so that coarse dust is first captured by the coarse bar screen 1, and then fine dust is captured by the fine bar screen 2. It was.

Japanese Patent No. 3768518

  By the way, the conventional bar screen type dust remover has the advantage of being able to capture coarse dust and fine dust with a single bar screen type dust remover, but the material cost is high, which is the production of the bar screen type dust remover. It led to an increase in cost.

  In view of the problems of the conventional bar screen type dust remover, the present invention can reduce the manufacturing cost by reducing the material cost by sharing the materials of the coarse rake and the fine rake. An object of the present invention is to provide a bar screen type dust remover having a coarse screen and a fine screen.

  In order to achieve the above object, a bar screen type dust remover of the present invention comprises a bar screen comprising a coarse bar screen arranged at intervals, a fine bar screen arranged between the coarse bar screens, and the bar screen. In a bar screen type dust remover equipped with a coarse rake and a rake made of fine rake that are used to scrape and discharge the dust caught in the above, the rake is a plate on which the coarse rake is disposed horizontally. A plurality of plate members that are arranged vertically in the rake frame and divided in the longitudinal direction of the rake frame. The coarse rake and fine rake formed by the division are fixed to the rake frame. A bar screen type dust remover characterized in that it is attached using means.

  In this case, the claw of the coarse rake can be formed so that a cutout portion into which the coarse bar screen is inserted is formed at a position where the coarse rakes configured to be divided are adjacent to each other.

  Further, a gap can be present between the adjacent coarse rakes formed by dividing.

  Moreover, a bolt can be used for the fixing means.

  According to the bar screen type dust remover of the present invention, materials for the coarse rake and the fine rake can be made common, thereby suppressing the material cost and reducing the manufacturing cost.

It is a cross-sectional view which shows one Example of the bar screen of the bar screen type dust remover of this invention. It is a cross-sectional view which shows one Example of the bar screen of the bar screen type dust remover of this invention. It is a cross-sectional view which shows one Example of the bar screen of the bar screen type dust remover of this invention. It is a perspective view which shows one Example of the rake of the bar screen type dust remover of this invention. It is a perspective view which shows the reference example of the rake of a bar screen type dust remover, (a) is a coarse rake, (b) is a fine rake. It is a perspective view which shows the reference example of the fine rake of a bar screen type dust remover. It is a cross-sectional view showing a reference example of a bar screen and a rake of a bar screen type dust remover. It is a general view which shows one Example of a bar screen type dust remover. It is a cross-sectional view showing one embodiment of the bar screen and rake of the bar screen type dust remover of the present invention. It is explanatory drawing which shows the state which installed the bar screen type dust remover of this invention so that it might become parallel to the water flow of the main line of a river or a merge pipe. It is a perspective view which shows the screen of the conventional bar screen type dust remover.

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

1 and 8 show an embodiment of the bar screen type dust remover of the present invention.
The bar screen type dust remover includes a coarse bar screen 1 having a wide mesh width M1 arranged at intervals and a fine bar screen 2 having a narrow mesh width M2 arranged between the coarse bar screens 1 (in this embodiment). The fine screen bar 21 constituting the fine fine bar screen 2 is disposed between the coarse screen screens 11 constituting the coarse fine bar screen 1). The rake 3 is composed of a coarse rake 31 and a fine rake 32 which are used to scrape and discharge the dust captured by the bar screen S.

  In this case, the front end face of the coarse screen bar 11 constituting the coarse bar screen 1 is positioned forward (upstream of the water flow) from the front end face of the fine screen bar 21 constituting the fine bar screen 2, The coarse dust S1 is captured by the front end face of the coarse screen bar 11 constituting the coarse bar screen 1, and the fine dust S2 is captured by the front end face of the fine screen bar 21 constituting the fine bar screen 2.

In this bar screen type dust remover, the plate thickness T1 of the coarse screen bar 11 constituting the coarse bar screen 1 and the plate thickness T2 of the fine screen bar 21 constituting the fine bar screen 2 are set to be the same. I have to.
As a result, it is possible to share the materials of the coarse screen bar and the fine screen bar, and the production cost can be reduced while suppressing the material cost.

  Further, the bar screen S is inserted through the bolts 10 through the through holes formed in the rear end portions of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2. At this time, the coarse bar screen 1 is defined by the distance between the adjacent coarse screen bar 11 and fine screen bar 21 and the fine screen bar 21 by the short tubular distance piece 10b inserted through the bolt 10a. And the fine bar screen 2 is fixed integrally.

At this time, the rear end surfaces of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 are positioned in the same plane.
Accordingly, the rear end surfaces of the coarse screen bar 11 and the fine screen bar 21 can be used as reference surfaces for assembling the bar screen S, and the bar screen S can be assembled easily and accurately. .
Note that the rear end surface of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 do not necessarily have to be located in the same plane. As shown in FIG. 9, the coarse screen bar 11 constituting the coarse bar screen 1 which is likely to be subjected to a large load is formed to have a large width (dimension in the water flow direction), and the rear end face of the coarse screen bar 11 is adjusted accordingly. Can be formed so as to protrude rearward (downstream of the water flow).

Incidentally, the cross-sectional shape of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 can be formed in a rectangular shape, but as in the embodiment shown in FIG. Various cross-sectional shapes, for example, chamfering the front end surface and the rear end surface, forming a widened portion at the front end portion, forming a wedge shape with the front end side widened, and widening the front end side (and the rear end side) Thus, the side surface can be formed into a curved shape.
In particular, the cross-sectional shape (plate thickness) of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 is formed so that the front end face side is thick and the rear end face side is thin. It is preferable that this prevents dust from being caught between the opposing surfaces of the coarse screen bar 11 and / or fine screen bar 21 and prevents the coarse bar screen 1 and fine bar screen from becoming clogged. Can be prevented.

Further, the arrangement of the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 can be regularly repeated, but as in the embodiment shown in FIG. The arrangement of the coarse screen bar 11 constituting the coarse bar screen 1 and / or the fine screen bar 21 constituting the fine bar screen 2 can be changed at the position in the width direction of the water channel.
Thereby, the mesh width M1 of the coarse bar screen 1 can be substantially changed in the width direction of the water channel as in M1a to M1c. Depending on the usage form and installation location of the bar screen type dust remover, Even when the inflow situation is different, it is possible to appropriately cope with the situation, and it is possible to increase the efficiency of collecting garbage and to subdivide the sorting of the collected garbage.

The coarse rake 31 (and / or fine rake 32) is a plate on which the coarse rake 31 (and / or fine rake 32) is disposed in the horizontal direction as shown in FIG. 4 (and FIG. 6). It can be divided into members, and can be attached to the rake frame 30 of the rake 3 in a single plate shape using a fixing means 30a such as a bolt.
As a result, it is possible to share the material of the coarse rake 31 (and / or the fine rake 32), thereby reducing the material cost and reducing the manufacturing cost.

Further, as shown in FIG. 4, the fine rake 32 can be constituted by a plate member arranged in the vertical direction.
Thereby, the load resistance of the fine rake 32 can be improved, and the durability of the rake 3 can be improved.

Further, the coarse rake 31 and the fine rake 32 can be configured separately as in the reference examples shown in FIGS.
Thereby, the load concerning each rake 3 can be made small and the durability of rake 3 can be improved.
The type and number of rake 3 can be selected according to the size and properties of the garbage, which varies depending on the usage and installation location of the bar screen type dust remover. Can be cheap.

Further, the rake 3 is composed of a plurality of rakes 3, and for each rake 3, the coarse rake 31 and the fine rake 32 constituting the rake 3 are replaced by the coarse rake 31 of the coarse rake 31 as in the reference example shown in FIG. The claw is provided in an arrangement different from the arrangement of the coarse screen bar 11 constituting the coarse bar screen 1, or the claw of the fine rake 32 is arranged in an arrangement different from the arrangement of the fine screen bar 21 constituting the fine bar screen 2. Can be provided.
In this case, all the mesh widths M1 and M2 formed by the coarse screen bar 11 constituting the coarse bar screen 1 and the fine screen bar 21 constituting the fine bar screen 2 by at least one round of the plurality of rakes 3. In between, the claws of the coarse rake 31 and the fine rake 32 are inserted at least once so that the dust caught by the bar screen S is swept away without being left behind by the bar screen S.
Thereby, the load concerning each rake 3 can be made small and the durability of rake 3 can be improved.

  Then, as shown in FIG. 8, this bar screen type dust remover extends a coarse bar screen 1 longer than the fine bar screen 2 as required on the ground and extends from the end of the fine bar screen 2. The apron 4 is provided partway through the screen 1, and the fine dust collection unit 62 that collects the fine dust S 2 is provided below the terminal end of the apron 4, and the coarse dust S 1 is collected below the terminal end of the coarse bar screen 1. A coarse waste collection unit 61 is provided.

The rake 3 is driven by a rake drive mechanism 7 including a chain 72 installed on the upper and lower main body sprockets 71 so as to circulate around the bar screen S and lift up dust on the front side of the bar screen S. .
The rake 3 is provided with a front screen rake 33 that meshes with the mesh width of the front screen 8 erected on the bottom of the water channel at the back of the rake 3.

In this case, the coarse screen bar 11 constituting the coarse bar screen 1 is made of a strip-shaped flat steel, or a plate member made of synthetic resin or composite material, and is not particularly limited. They are arranged at a certain interval (the interval M1 of the coarse bar screen 1 is defined by this interval and the plate thickness T1 of the coarse screen bar 11).
The fine screen bar 21 constituting the fine bar screen 2 disposed between the coarse bar screens 1 is made of a plate-like flat steel similar to the coarse bar screen 1, or a plate member made of synthetic resin or composite material. Although not particularly limited, for example, it is arranged at an interval of about 2.5 cm (the width M2 of the fine bar screen 2 is defined by this interval and the plate thickness T2 of the fine screen bar 21). To set up.
Here, the respective mesh widths M1 and M2 of the coarse bar screen 1 and the fine bar screen 2 can be appropriately set according to the purpose of use of the bar screen type dust remover. The width M1 is set to about 50 to 100 mm, and the mesh width M2 of the fine bar screen 2 is set to about 10 to 25 mm.

  The plate thickness T2 of the fine screen bar 21 constituting the fine bar screen 2 that is difficult to be subjected to a large load is formed thinner than the plate thickness T1 of the coarse screen bar 11 constituting the coarse bar screen 1 that is likely to be subjected to a large load. As a result, the material cost can be suppressed and the manufacturing cost can be reduced.

  Further, the width W2 of the fine screen bar 21 constituting the fine bar screen 2 which is difficult to be subjected to a large load is formed smaller than the width W1 of the coarse screen bar 11 constituting the coarse bar screen 1 which is likely to be subjected to a large load. Thus, the manufacturing cost can be reduced while suppressing the material cost.

Next, the operation of this bar screen type dust remover will be described.
The screen composed of the coarse bar screen 1 and the fine bar screen 2 is installed in the water channel together with the front screen 8 erected on the bottom of the water channel.

  Then, the front end surface of the coarse screen bar 11 constituting the coarse bar screen 1 is positioned in front of the front end surface of the fine screen bar 21 constituting the fine bar screen 2 (upstream side of the water flow). The coarse dust S1 is captured on the front end surface of the coarse screen bar 11 constituting the bar screen 1, and the fine dust S2 is captured on the front end surface of the fine screen bar 21 constituting the fine bar screen 2.

  On the other hand, 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 laid from the end of the fine bar screen 2 to the middle of the extended coarse bar screen 1, Since the dust S2 is prevented from falling, the fine dust S2 captured at the mesh width M2 of the fine bar screen 2 is swept up along the apron 4 by the rake 3.

  A fine dust collection unit 62 that collects the fine dust S2 is provided below the terminal end of the apron 4, and a coarse dust collection unit 61 that collects the coarse dust S1 is provided below the terminal end of the coarse bar screen 1. Is provided.

The fine dust collecting unit 62 is provided with a watering nozzle 9 for unloading that sprinkles from above the coarse bar screen 1 so as to encourage the fine dust S2 to fall from the rake 3.
Then, in the fine dust collecting unit 62, the fine dust S2 that has been scraped by the rake 3 and disappeared from the apron 4 in the middle is recovered and transported by the flowing water trough in the present embodiment.

  Further, in the coarse waste collecting unit 61 at the end of the coarse bar screen 1, the fallen coarse waste S1 is collected and conveyed by a belt conveyor provided therebelow.

  As described above, the bar screen type dust remover of the present embodiment can separate and discharge the dust captured at the respective mesh widths M1 and M2 of the coarse bar screen 1 and the fine bar screen 2.

In the above embodiment, the bar screen S is composed of the coarse bar screen 1 and the fine bar screen 2, but the mesh width M1 of the coarse bar screen 1 and the fine bar screen 2 are as shown in FIG. The intermediate bar screen 5 set to an intermediate mesh width of the width M2 may be disposed between the coarse bar screens 1 and provided with an intermediate eye rake 35.
In this case, the intermediate eye bar screen 5 and the intermediate eye rake 35 can be configured not only in one stage but also in two or more stages.
In this case, from the front (upstream side of the water flow), the front end surface of the coarse screen bar 11 constituting the coarse bar screen 1, the front end surface of the intermediate screen bar 51 constituting the intermediate bar screen 5, and the fine bar screen 2. Are arranged in order.
Further, the thickness T1, T5, T2 of the coarse screen bar 11 constituting the coarse bar screen 1, the intermediate screen bar 51 constituting the intermediate bar screen 5, and the fine screen bar 21 constituting the fine bar screen 2. However, as shown in the present embodiment, the thickness T1 of the coarse screen bar 11 constituting the coarse bar screen 1 and the intermediate mesh constituting the intermediate bar screen 5 as shown in the present embodiment. The thickness T5 of the fine screen bar 51 and the fine screen bar 21 constituting the fine bar screen 2 are formed so as to decrease in thickness in this order, or the thick screen bar 11 constituting the coarse bar screen 1 is provided with the thickness T1. Only the plate thickness T2 of the fine screen bar 21 constituting the fine bar screen 2 is thin. Can also be formed, thereby, if necessary, while increasing the strength, it can be inexpensive and the manufacturing cost while suppressing the material costs.
Further, in the present embodiment, the widths (dimensions in the water flow direction) of the coarse screen bar 11 constituting the coarse bar screen 1 and the intermediate bar screen 5 constituting the coarse bar screen 5 which are likely to be subjected to a large load, In this order, the fine screen bar 21 is formed to have a width larger than the width of the fine screen bar 21, and the rear end surfaces of the coarse screen bar 11 and the intermediate screen bar 51 are arranged in this order in the rear (water flow). Are formed so as to protrude to the downstream side), but the coarse screen bar 11 constituting the coarse bar screen 1, the intermediate screen bar 51 constituting the intermediate bar screen 5, and the fine bar screen 2 are constituted. The rear end surface of the fine screen bar 21 can be positioned in the same plane.
The configurations of the intermediate bar screen 5 and the intermediate rake 35 are appropriately selected from the configurations applied to the coarse bar screen 1 and the fine bar screen 2, the coarse rake 31 and the fine rake 32. Can do.
As a result, it is possible to increase the efficiency of collecting garbage and to subdivide the sorting of the collected garbage.

  As described above, the bar screen type dust remover of the present invention has been described based on the embodiment of the back screen continuous bar screen type dust remover, but the present invention is not limited to the configuration described in the above embodiment, For example, various types of bar screen dust removers such as a continuous front descending bar screen dust remover and an intermittent bar screen dust remover, a bar screen dust remover that uses a manual rake such as a hand-drawn type, Furthermore, as shown in FIG. 10, by installing the bar screen S so that the coarse screen bar 11 and the fine screen bar 21 constituting the bar screen S are substantially horizontal, It can be applied to dust removers installed so as to be parallel to the water flow of the main line of rivers or merge pipes, or remove dust, etc. outside sewage treatment and waterways, Are those applicable to dust remover used for removal of dust contained in the fly waste water, also those that can be changed as appropriate its configuration without departing from the scope and spirit thereof.

  Since the bar screen type dust remover of the present invention has characteristics such as reducing the material cost and reducing the manufacturing cost while maintaining the required performance such as strength, various bar screen type Can be widely used for dust remover applications, and can be easily applied to existing dust removers by replacing the dust remover components in addition to the newly installed bar screen dust remover. can do.

S Bar Screen 1 Coarse Bar Screen 11 Coarse Screen Bar M1 Coarse Screen Bar Width T1 Coarse Screen Bar Thickness 2 Fine Bar Screen 21 Fine Screen Bar M2 Fine Screen Bar Width T2 Fine Screen Bar 3 rake 30 rake frame 31 coarse rake 32 fine rake 33 front screen rake 35 intermediate eye rake 4 apron 5 intermediate eye bar screen 51 intermediate eye screen bar M5 intermediate eye screen bar width T5 intermediate Thickness of eye screen bar 61 Coarse dust collection unit 62 Fine dust collection unit 7 Rake drive mechanism 71 Main body sprocket 72 Chain 8 Front screen 9 Unloading water spray nozzle 10a Through bolt 10b Distance piece S1 Coarse dust S2 Fine dust

Claims (4)

  Coarse bar screen comprising coarse bar screens arranged at intervals, fine bar screens arranged between the coarse bar screens, and a coarse rake for scraping and discharging the dust captured by the bar screens And a bar screen type dust remover comprising a fine rake rake, the rake is a plate member that arranges the coarse rake in the horizontal direction, and a plurality of plate members that arrange the fine rake in the vertical direction Bar screen type dust removal characterized in that the rake frame is divided into the longitudinal direction of the rake frame and the divided coarse rake and fine rake are attached to the rake frame using fixing means. Machine.   2. The bar according to claim 1, wherein the coarse rake claw is formed so that a notch portion into which the coarse bar screen is inserted is formed at a position where the coarse rakes formed by division are adjacent to each other. Screen type dust remover.   The bar screen type dust remover according to claim 1 or 2, wherein a gap exists between adjacent coarse rakes formed by division.   4. The bar screen type dust remover according to claim 1, wherein a bolt is used as the fixing means.

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