JP2017106283A - Repair method of bar screen type dust remover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair method of a bar screen type dust remover capable of restraining repair cost by reducing a place and a part of requiring repair, and capable of raking out and raking up dust captured between thin-mesh screen bars by a rake.SOLUTION: When replacing a bar screen S0 in a bar screen type dust remover J0 with a coarse-mesh/thin-mesh bar screen S constituted by arranging a coarse-mesh screen bar 11 and a thin-mesh screen bar 21 in parallel, the coarse-mesh/thin-mesh bar screen S is installed so that the rear edge of the thin-mesh screen bar 21 for constituting the coarse-mesh/thin-mesh bar screen S is positioned on the inflow side with respect to a position of the rear edge of the screen bar 10 and a front face of an apron 4 for constituting the bar screen S0 before repair.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for repairing a bar screen type dust remover, and in particular, a bar screen configured by arranging screen bars of the same shape in parallel, an apron provided on the upper part of the bar screen, a bar screen and an apron. A coarse screen comprising a coarse screen bar and a fine screen bar arranged in parallel in a bar screen type dust remover equipped with a rake for scraping up dust trapped on the bar screen by moving along -It relates to the repair method of the bar screen type dust remover to replace the fine bar screen.

  Conventionally, as a dust remover installed in a dust removal facility or the like of a sand basin, a bar screen type dust remover (for example, see Patent Document 1) including a bar screen configured by arranging screen bars of the same shape in parallel. A bar screen type dust remover (see, for example, Patent Document 2) having a coarse / fine bar screen configured by arranging a coarse screen bar and a fine screen bar in parallel is widely used.

JP 2002-69975 A JP 2010-203093 A

  By the way, in recent years, screen bars of the same shape installed in the dust removal equipment of a sand basin are arranged in parallel so that fine dust contained in sewage can be removed by one bar screen type dust remover. There is a need to refurbish the bar screen type dust remover having the above-described bar screen to a bar screen type dust remover having a coarse / fine bar screen in which a coarse screen bar and a fine screen bar are arranged in parallel.

  This refurbishment method can be broadly divided into a method of replacing an existing bar screen type dust remover with a new bar screen type dust remover, and replacing a part of the existing bar screen type dust remover with a new component member. There is a method.

  Among these, compared with the former repair method, the latter repair method has an advantage that the repair cost can be suppressed because at least a part of the constituent members of the existing bar screen type dust remover is used.

  However, in the case of the latter modification method (especially when the screen bar has a fine mesh width of approximately 20 mm or less), a bar screen type dust remover having a bar screen in which screen bars having the same shape are arranged in parallel. In addition, with a bar screen type dust remover equipped with coarse and fine bar screens configured by arranging coarse screen bars and fine screen bars in parallel, the position of the apron with respect to the bar screen and the dust captured by the bar screen The structure of the rake for scraping was different, and repairs were required to cope with this, and there was a limit to the effect of suppressing repair costs.

  The present invention changes the tip locus of the existing rake in view of the problems of the repair method of the bar screen dust remover that replaces some of the components of the conventional existing bar screen dust remover with new components. By providing a rough and fine bar screen arrangement position and rake shape that does not occur, and by reducing the number of parts and parts that need to be renovated, it is possible to reduce renovation costs and to collect garbage collected between fine screen bars An object of the present invention is to provide a method for repairing a bar screen type dust remover that can be scraped and scraped by a rake.

  In order to achieve the above object, a method for refurbishing a bar screen type dust remover of the present invention comprises a bar screen configured by arranging screen bars of the same shape in parallel, an apron provided on the top of the bar screen, a bar A bar screen in a bar screen type dust remover equipped with a rake for scraping up dust trapped on the bar screen by moving along the screen and the apron, and a coarse screen bar and a fine screen bar are arranged in parallel. The rear screen edge of the fine screen bar constituting the coarse / fine bar screen is the bar screen of the bar screen type dust remover before the repair. The inflow side from the position of the rear edge of the screen bar and the front of the apron Characterized in that so as to install the coarse-fine bar screen to be positioned.

  In this case, the tip locus of the rake before the repair and the tip locus of the rake after the repair can be prevented from changing.

  The coarse / fine bar screen has a front edge of the coarse screen bar on the inflow side from the front edge of the fine screen bar, and a rear edge of the coarse screen bar on the outflow side from the rear edge of the fine screen bar. Each can be configured to be located.

  The rake may be configured to include a coarse screen bar of a coarse / fine bar screen and a flat rake plate having flat teeth inserted between the fine screen bars.

  According to the repair method of the bar screen type dust remover of the present invention, the rear edge of the fine screen bar constituting the coarse / fine bar screen is located behind the screen bar constituting the bar screen of the bar screen dust remover before the repair. By installing the coarse / fine bar screen so that it is located on the inflow side from the position of the edge and the front of the apron, the trash trapped between the fine screen bars can be scraped out and scraped up. However, even if the apron of the existing bar screen type dust remover is used as it is, it can be prevented from interfering with the rake, and the repair cost can be suppressed by reducing the number of parts and parts that need to be repaired.

  In addition, by making the tip track of the rake before the repair and the tip track of the rake after the repair unchanged, the repair cost can be reduced by reducing the number of parts and parts that need to be repaired.

  The coarse / fine bar screen has a front edge of the coarse screen bar on the inflow side from the front edge of the fine screen bar, and a rear edge of the coarse screen bar on the outflow side from the rear edge of the fine screen bar. By configuring so as to be located respectively, the strength of the coarse screen bar can be increased, and the fine screen bar can be prevented from being damaged by the collision of driftwood or the like.

  In addition, the rake is configured to include a coarse rake screen of coarse and fine bar screens and a flat rake plate formed with flat teeth inserted between the fine screen bars. Can be used, and renovation costs can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the bar screen type dust remover before repair which applies the repair method of the bar screen type dust remover of this invention, (a) is a side view, (b) is explanatory drawing of the principal part. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the repaired bar screen type dust remover which applied the repair method of the bar screen type dust remover of this invention, (a) is a side view, (b) is explanatory drawing of the principal part. It is a top view of the principal part of the same bar screen type dust remover, (a) is a bar screen type dust remover before repair, (b) is a bar screen type dust remover after repair. It is a top view of the principal part of the bar screen type dust remover after the repair. It is explanatory drawing which shows an example of the repaired bar screen type dust remover which applied the repair method (comparative example) of another bar screen type dust remover, (a) is a side view, (b) is explanatory drawing of the principal part. is there.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a repair method for a bar screen type dust remover according to the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 3 (a) show an existing bar screen type dust remover J0 before renovation.
The bar screen type dust remover J0 includes a bar screen S0 formed by arranging screen bars 10 having the same shape in parallel, an apron 4 provided on the upper portion of the bar screen S0, and the bar screen S0 and the apron 4 along the bar screen S0. And a rake 30 for scooping up the dust trapped on the bar screen S0.

  The bar screen type dust remover J0 is provided with an apron 4 for guiding the dust that has been lifted up by the rake 30 on the upper portion of the bar screen S0 on the ground, and at the end of the apron 4 by the rake 30. A wiper 61 that separates the scraped garbage from the rake 30 and a chute 62 that collects the separated garbage are provided.

  The rake 30 is driven by a rake drive mechanism 7 including a chain 72 installed on the upper and lower main body sprockets 71. The rake 30 is guided by the guide rail 33 and circulates along the bar screen S0. So that you can scrape trash.

Here, as shown in FIG. 3A, the thickness T0 of the screen bar 10 constituting the bar screen S0 of the bar screen type dust remover J0 is, for example, 9 mm, and the width W0 of the screen bar 10 is, for example, The eye width M0 of the screen bar 10 is set to, for example, 35 mm.
Further, the bar screen S0 is constructed by assembling the screen bar 10 using a through bolt 51 and a distance piece 52.

  In refurbishing this bar screen type dust remover J0, here, as shown in FIG. 2, FIG. 3 (b) and FIG. 4, the bar screen S0 in the bar screen type dust remover J0 is replaced with a coarse screen bar 11 and a fine screen. The bars 21 are arranged in parallel, specifically, the coarse / fine bar screen S is configured by arranging a plurality of fine screen bars 21 between the coarse screen bars 11 arranged at intervals. To.

  In this case, the rear end edge of the fine screen bar 21 constituting the coarse / fine bar screen S is located on the inflow side from the rear end edge of the screen bar 10 constituting the bar screen S0 before the repair and the front face of the apron 4. The coarse / fine bar screen S is installed as described above.

Here, as shown in FIG. 3B, the thickness T1 of the coarse screen bar 11 constituting the coarse / fine bar screen S of the bar screen type dust remover J is, for example, 9 mm and the width of the coarse screen bar 11 W1 is, for example, 75 mm, the mesh width M1 of the coarse screen bar 11 is, for example, 84 mm, and the plate thickness T2 of the fine screen bar 21 is, for example, (4 to) 6 mm, the width of the fine screen bar 21 W2 is set to 30 mm, for example, and the mesh width M2 of the fine screen bar 21 is set to 12 mm, for example.
The coarse / fine bar screen S is constructed by assembling the coarse screen bar 11 and the fine screen bar 21 using through bolts 51 and a distance piece 52.

In the coarse / fine bar screen S, the front edge of the coarse screen bar 11 is closer to the inflow side than the front edge of the fine screen bar 21 (for example, 25 mm), and the rear edge of the coarse screen bar 11 is the fine screen bar 21. It is configured to be positioned on the outflow side (for example, 20 mm) from the rear end edge.
As a result, the strength of the coarse screen bar 11 can be increased, and the fine screen bar 21 can be prevented from being damaged by collision of driftwood or the like (an object having a diameter D, for example, 100 mm as shown in FIG. 4).

The rake 3 is driven by a rake drive mechanism 7 including a chain 72 installed on the upper and lower body sprockets 71, guided by the guide rail 33, and circulated along the coarse / fine bar screen S. A plate-shaped rake plate 31 having a spur tooth inserted between the coarse screen bar 11 and the fine screen bar 21 of the coarse / fine bar screen S for scraping dust on the inflow side of the fine bar screen S. It is made to comprise.
Here, the rake plate 31 has a substantially entire length in the width direction of the fine screen bar 21 (usually fine fine) so that dust trapped between the fine screen bars 21 can be scraped and scraped by the flat teeth of the rake plate 31. 70% or more of the width W2 of the screen bar 21, preferably 80% or more (in this embodiment, 83%) is preferably inserted.
Further, in the present embodiment, the rake plate 31 is formed by forming flat teeth by laser cutting a metal plate.
Accordingly, the rake 3 having a simple structure can be used, and the repair cost can be suppressed.

  In this embodiment, the rake 3 is driven by a rake drive mechanism 7 comprising a chain 72 installed on the upper and lower main body sprockets 71, and circulates along the coarse / fine bar screen, while the coarse / fine bar is circulated. Although dust is scraped up on the inflow side of the screen S, instead of the rake 3, for example, a rake or the like in which one rake is reciprocated by a rake drive mechanism such as a lever can be used.

  By the way, in this embodiment, the coarse / fine bar screen S allows the dust captured between the fine screen bars 21 to be scraped out by the rake 3 and scraped up, while the apron of the existing bar screen type dust remover J0. The coarse / fine bar screen S is provided so that the width W1 of the coarse screen bar 11 can be secured so that it can be prevented from interfering with the rake 3 even if 4 is used as it is, and the strength of the coarse screen bar 11 can be maintained. The front edge of the coarse / fine bar screen S, that is, the front edge of the coarse screen bar 11 is positioned on the inflow side (for example, 25 mm) from the front edge of the bar screen S0 of the existing bar screen type dust remover J0 before the repair. To be installed.

  Further, the receiving beam 9 for supporting the coarse / fine bar screen S on the main body structure 8 side is added according to the required support strength.

Next, FIG. 5 shows a comparative example of the repair method of the bar screen type dust remover J0.
In this comparative example, the bar screen S0 in the bar screen type dust remover J0 is arranged with the coarse screen bar 11 and the fine screen bar 21 in parallel, specifically, between the coarse screen bars 11 arranged at intervals. In this embodiment, a coarse / fine bar screen S ′ is formed by arranging a plurality of fine screen bars 21.

  In this case, the rear end edge of the fine screen bar 21 constituting the coarse / fine bar screen S ′ of the bar screen type dust remover J ′ has a coarse screen bar as used in a general coarse / fine bar screen. 11 and a rear end edge.

Here, the plate thickness T1 (not shown) of the coarse screen bar 11 constituting the coarse / fine bar screen S of the bar screen dust remover J ′ is, for example, 9 mm, and the width W1 of the coarse screen bar 11 is, for example, The screen width M1 (not shown) of the coarse screen bar 11 is, for example, 84 mm, and the plate thickness T2 (not shown) of the fine screen bar 21 is, for example, (4 to) 6 mm. The width W2 of 21 is set to 50 mm, for example, and the mesh width M2 (not shown) of the fine screen bar 21 is set to 12 mm, for example.
The coarse / fine bar screen S ′ is constructed by assembling the coarse screen bar 11 and the fine screen bar 21 using the through bolts 51 and the distance piece 52.

In this comparative example, the rake 3 ′ is inserted between the flat rake plate 31 ′ having flat teeth inserted between the coarse screen bars 11 of the coarse / fine bar screen S and the fine screen bar 21. The comb-shaped rake 32 is configured in combination.
Here, the rake 3 ′ is inserted over substantially the entire length of the fine screen bar 21 in the width direction so that the dust trapped between the fine screen bars 21 can be scraped and scraped by the comb-shaped rake 32. The shape is
For this reason, if the apron 4 of the existing bar screen type dust remover J0 is used as it is, the apron 4 will interfere with the comb-shaped rake 32 of the rake 3 '. In this comparative example, the apron 4 is modified. Thus, it is set back on the outflow side (for example, 50 mm).

  Table 1 shows the necessity of refurbishing the target location / parts in the above example and comparative example.

As apparent from Table 1, according to the repair method of the bar screen type dust remover of the present embodiment, the dust captured between the fine screen bars 21 is scraped out by the rake 3 and can be scraped up. Even if the apron 4 of the existing bar screen type dust remover J0 is used as it is, it can be prevented from interfering with the rake 3, and the repair cost can be reduced by reducing the number of parts and parts that need to be repaired.
In the column of the main body structure in Table 1, the necessity of repair of the comparative example is “necessary” because in the comparative example, the tip locus of the rake 3 changes, so that the rake 3 circulates. It is necessary to repair the main body structure that interferes with

  As mentioned above, although the repair method of the bar screen type dust remover of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, In the range which does not deviate from the meaning The configuration can be changed as appropriate.

  Since the repair method of the bar screen type dust remover of the present invention can suppress the repair cost by reducing the number of parts and parts that need to be repaired, the bar screen of the bar screen type dust remover is replaced with a coarse screen bar and The fine screen bar can be suitably used for replacement with a coarse / fine bar screen configured by arranging them in parallel.

J0 bar screen dust remover (before renovation)
J Bar screen dust remover (after repair)
J 'bar screen type dust remover (comparative example)
S0 bar screen (before renovation)
S Coarse / fine bar screen (after repair)
S 'Coarse / Fine Bar Screen (Comparative Example)
10 Screen bar M0 Screen bar mesh width T0 Screen bar thickness W0 Screen bar width 1 Coarse bar screen 11 Coarse screen bar M1 Coarse screen bar mesh T1 Coarse screen bar thickness W1 Coarse screen bar width 2 Fine Bar screen 21 Fine screen bar M2 Fine screen bar width T2 Fine screen bar thickness W2 Fine screen bar width 30 Rake (before renovation)
3 Rake (after renovation)
3 'rake (comparative example)
31 Rake board (after repair)
31 'rake plate (comparative example)
32 Comb-shaped rake (comparative example)
33 Guide rail 4 Apron 51 Through bolt 52 Distance piece 61 Wiper 62 Chute 7 Rake drive mechanism 71 Body sprocket 72 Chain 8 Body structure 9 Girder

Claims (4)

  A bar screen configured by arranging screen bars of the same shape in parallel, an apron provided on the top of the bar screen, and moving up along the bar screen and the apron, scrapes dust captured by the bar screen. Bar screen type dust remover for replacing a bar screen in a bar screen type dust remover with a coarse screen bar and a fine screen bar arranged in parallel with each other with a coarse screen bar and a fine screen bar arranged in parallel , The rear edge of the fine screen bar constituting the coarse / fine bar screen is located on the inflow side from the position of the rear edge of the screen bar constituting the bar screen of the bar screen type dust remover before renovation and the front surface of the apron. The special feature is that coarse and fine bar screens are installed. Repair method of the bar screen type dust collector to be.   The repair method of the bar screen type dust remover according to claim 1, wherein the tip locus of the rake before the repair and the tip locus of the rake after the repair are not changed.   The coarse and fine bar screens are positioned such that the front edge of the coarse screen bar is on the inflow side from the front edge of the fine screen bar, and the rear edge of the coarse screen bar is on the outflow side of the rear edge of the fine screen bar. The repair method of the bar screen type dust remover according to claim 1 or 2, characterized in that the apparatus is configured to do so.   2. The rake is configured to include a coarse rake plate of a coarse / fine bar screen and a flat rake plate formed with flat teeth inserted between the fine screen bars. Or the repair method of the bar screen type dust remover of 3.

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