JP6502242B2 - Renovation method of bar screen type dust collector - Google Patents

Description

  The present invention relates to a method of repairing a bar screen type dust remover, and in particular, to 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 screen and an apron A coarse screen in which a bar screen in a bar screen type dust remover equipped with a rake for scraping up dust captured on the bar screen by moving along is arranged in parallel with a coarse screen bar and a fine screen bar -It is related with the repair method of the bar screen type dust collector for replacing with a fine bar screen.

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

Japanese Patent Laid-Open No. 2002-69975 Unexamined-Japanese-Patent No. 2010-203093

  By the way, in recent years, in order to be able to remove fine dust contained in sewage by one bar screen type dust remover, screen bars of the same shape installed in the dust removal equipment of sedimentation basin are disposed in parallel There is a demand to renovate a bar screen type dust remover equipped with a bar screen to a bar screen type dust remover equipped with a coarse and fine bar screen configured by arranging coarse screen bars and fine screen bars in parallel.

  This repair method is roughly divided into a method of replacing the existing bar screen type dust remover with a new bar screen type dust remover and a part of the components of the existing bar screen type dust remover with a new component There is a way.

  Among them, the latter modification method has an advantage that the modification cost can be suppressed because at least a part of the components of the existing bar screen type dust remover is used as compared with the former modification method.

  However, in the case of the latter modification method (in particular, in the case of fine details having a screen bar width of about 20 mm or less), a bar screen type dust remover provided with a bar screen configured by arranging screen bars of the same shape in parallel. In the case of a bar screen type dust remover equipped with a coarse screen bar and a fine screen bar arranged in parallel, and the dust screen of the apron relative to the bar screen and the dust captured on the bar screen The configuration of the rake for scraping was different, and it was necessary to make modifications to cope with this, and there was a limit to the effect of suppressing the modification costs.

  The present invention changes the tip trajectory of the existing rake in view of the problems with the method of repairing the bar screen dust remover replacing a part of the components of the conventional existing bar screen dust remover with new components. By providing the location and rake shape of the coarse and fine bar screens and reducing the number of places and parts requiring repair, it is possible to reduce the cost of repair, and the dust captured between the fine screen bars It is an object of the present invention to provide a method of repairing a bar screen type dust remover, which can be scraped out by rake and can be scraped up.

  In order to achieve the above object, the method of the present invention for repairing a bar screen type dust remover comprises a bar screen formed by arranging screen bars of the same shape in parallel, an apron provided on the top of the bar screen, and a bar The coarse screen bar and the fine screen bar are arranged in parallel, with the bar screen in the bar screen type dust remover provided with a rake for scraping the dust captured on the bar screen by moving along the screen and the apron. In the modification method of the bar screen type dust remover for replacing with the coarse and fine bar screen, the rear end edge of the fine screen bar constituting the coarse and fine bar screen is the bar screen of the bar screen type dust remover before the modification The inflow side from the position of the rear edge of the screen bar that constitutes the Characterized in that so as to install the coarse-fine bar screen to be positioned.

  In this case, it is possible to prevent the tip trajectory of the rake before the renovation and the tip trajectory of the rake after the renovation not changing.

  Also, the coarse and fine bar screen is arranged such that the front edge of the coarse screen bar is on the inflow side with respect to 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 Each can be configured to be located.

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

  According to the modification method of the bar screen type dust remover of the present invention, the rear end edge of the fine screen bar constituting the coarse and fine bar screen is behind the screen bar constituting the bar screen of the bar screen dust remover before the modification By placing the coarse and fine bar screen so as to be located on the inflow side from the position of the edge and the front surface of the apron, it is possible to rake off and scrape the dust captured between the fine screen bars Even if the apron of the existing bar screen type dust remover is used as it is, it does not interfere with the rake, and the repair cost can be suppressed by reducing the parts and parts that need to be repaired.

  In addition, by keeping the tip trajectory of the rake before repair and the tip trajectory of the rake after repair unchanged, repair costs can be reduced by reducing the number of parts and parts requiring repair.

  Also, the coarse and fine bar screen is arranged such that the front edge of the coarse screen bar is on the inflow side with respect to 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 By arranging them to be positioned, it is possible to increase the strength of the coarse screen bar and to prevent the fine screen bar from being damaged by the impact of driftwood or the like.

  In addition, the rake is configured by providing a rake plate including a rough screen bar having coarse and fine bars and a flat rake plate having flat teeth inserted between the fine screen bars. Can be used to reduce the cost of renovation.

It is explanatory drawing which shows an example of the bar screen type dust remover before the 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. It is explanatory drawing which shows an example of the bar screen type dust remover after the repair 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 bar screen type dust remover, (a) is a bar screen type dust remover before repair, and (b) is a bar screen dust remover after repair. It is a top view of the principal part of the bar screen type dust remover after the same repair. It is explanatory drawing which shows an example of the bar screen type dust collector after the repair which applied the repair method (comparative example) of the other bar screen type dust collector, (a) is a side view, (b) is an explanatory drawing of the principal part is there.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a method of repairing a bar screen type dust remover of the present invention will be described based on the drawings.

FIG. 1 and FIG. 3 (a) show the existing bar screen type dust remover J0 before the repair.
The bar screen type dust remover J0 includes a bar screen S0 formed by arranging screen bars 10 of 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 And a rake 30 for scraping the dust captured on the bar screen S0 by moving.

  The bar screen type dust remover J0 has an apron 4 for guiding waste scraped off by the rake 30 at the top of the bar screen S0 on the ground, and at the end of the apron 4 by the rake 30 A wiper 61 for separating scraped scraps from the rake 30 and a chute 62 for collecting the scraps are provided.

  The rake 30 is driven by a rake drive mechanism 7 consisting of a chain 72 mounted on upper and lower main body sprockets 71, guided by the guide rail 33 and circulated along the bar screen S0 while the inflow side of the bar screen S0 Scrape the trash with

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 at 75 mm.
Also, the bar screen S0 is configured to assemble the screen bar 10 using the through bolt 51 and the distance piece 52.

  In the modification of the 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, the coarse screen bar 11 and the fine screen The bars 21 are arranged in parallel, specifically, it is replaced with a coarse-fine bar screen S configured by arranging a plurality of fine screen bars 21 between coarse screen bars 11 spaced apart. Make it

  In this case, the rear end edge of the fine screen bar 21 constituting the coarse / fine bar screen S is positioned on the inflow side from the positions of the rear end edge of the screen bar 10 constituting the bar screen S0 before refurbishment and the front surface of the apron 4 The coarse and fine bar screen S should be installed to

Here, as shown in FIG. 3B, the thickness T1 of the coarse screen bar 11 constituting the coarse and 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 eye 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, for example, 30 mm, and the eye width M2 of the fine screen bar 21 is set to, for example, 12 mm.
Also, the coarse and fine bar screen S is configured to assemble the coarse screen bar 11 and the fine screen bar 21 using the through bolt 51 and the distance piece 52.

In the coarse / fine bar screen S, the front end edge of the coarse screen bar 11 is closer to the inflow side than the front end edge of the fine screen bar 21 (for example, 25 mm), and the rear end edge of the coarse screen bar 11 is the fine screen bar 21. It is configured to be positioned respectively on the outflow side (for example, 20 mm) from the rear end edge of the.
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 the impact of a driftwood or the like (diameter D, for example, an object of 100 mm).

The rake 3 is driven by a rake drive mechanism 7 consisting of a chain 72 mounted on upper and lower main body sprockets 71. The rake 3 is guided by a guide rail 33 and circulated along the coarse / fine bar screen S while being coarse · Flat rake plate 31 with flat teeth formed between rough screen bars 11 and fine screen bars 21 of coarse and fine bar screens S for scraping up the dirt on the inflow side of fine bar screens S To be configured.
Here, the rake plate 31 scrapes the dirt captured between the fine screen bars 21 with the flat teeth of the rake plate 31 so that the dirt can be scraped up, substantially the entire length of the fine screen bars 21 in the width direction (generally fine It is preferable to make it the shape inserted 70% or more, preferably 80% or more of the width W 2 of the screen bar 21 (in this embodiment, 83%).
Further, in the present embodiment, as the rake plate 31, a metal plate with laser cut processing to form a spur tooth is used.
Thereby, the simple structure of the rake 3 can be used, and the repair cost can be suppressed.

  In the present embodiment, the rake 3 is driven by the rake drive mechanism 7 consisting of the chains 72 mounted on the upper and lower main body sprockets 71, and is circulated along the coarse and fine bar screens to make coarse and fine bars. Although the trash is scraped off 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 reciprocally driven by a rake drive mechanism such as a lever may be used.

  By the way, in the present embodiment, the coarse / fine bar screen S scrapes out the dust captured between the fine screen bars 21 by the rake 3 and allows the scrap to be scraped up, while the apron of the existing bar screen type dust remover J0 The coarse / fine bar screen S can be used so that it does not interfere with the rake 3 even if it is used as it is, and the width W1 of the coarse screen bar 11 can be maintained which can maintain the strength of the coarse screen bar 11. , The front end edge of the coarse / fine bar screen S, that is, the front end edge of the coarse screen bar 11 is located 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 renovation It is set to be installed.

  Further, the receiving girder 9 for supporting the coarse and fine bar screen S on the side of the main body structure 8 is expanded according to the required supporting strength.

Next, FIG. 5 shows a comparative example of the modification 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 disposed between the coarse screen bars 11 in which the coarse screen bars 11 and the fine screen bars 21 are disposed in parallel, specifically, spaced apart. The screen screen is replaced by a coarse / fine bar screen S ′ configured by arranging a plurality of fine screen bars 21 in FIG.

  In this case, the rear end edge of the fine screen bar 21 constituting the coarse and fine bar screen S ′ of the bar screen type dust remover J ′ is a coarse screen bar as employed in a general coarse and fine bar screen. The structure is made to coincide with the rear end edge of 11.

Here, the thickness T1 (not shown) of the coarse screen bar 11 constituting the coarse and fine bar screen S of the bar screen type 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, for example, 50 mm, and the eye width M2 (not shown) of the fine screen bar 21 is set to, for example, 12 mm.
In addition, the coarse and fine bar screen S ′ assembles the coarse screen bar 11 and the fine screen bar 21 using the through bolt 51 and the distance piece 52.

Further, in this comparative example, the lake 3 ′ is inserted between the fine screen bar 21 and the flat rake plate 31 ′ having flat teeth formed between the coarse screen bars 11 of the coarse and fine bar screens S. Is configured to be combined with the rake comb-like rake 32.
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 captured between the fine screen bars 21 can be scraped out by the comb-like rake 32 and scraped up. The shape is
Therefore, if the apron 4 of the existing bar screen type dust collector J0 is used as it is, the apron 4 interferes with the comb-like rake 32 of the rake 3 ', so in this comparative example, the apron 4 is modified It is set to be retracted backward (for example, 50 mm).

  Table 1 shows the necessity of repair of the target portions / parts of the above-mentioned embodiment and the comparative example.

As apparent from Table 1, according to the method of repairing a bar screen type dust remover of the present embodiment, it is possible to scrape and scrape up the dust captured between the fine screen bars 21 by the rake 3, Even if the apron 4 of the existing bar screen type dust collector J0 is used as it is, it can be made not to interfere with the rake 3, and the repair cost can be suppressed by reducing the parts and parts requiring repair.
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, since the tip trajectory of the rake 3 changes, when the rake 3 circulates It indicates that it is necessary to renovate the body structure that interferes with the

  As mentioned above, although the repair method of the bar screen type dust collector 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.

  According to the method of the present invention for modifying a bar screen dust remover, the cost of the repair can be reduced by reducing the parts and parts requiring repair, so that the bar screen of the bar screen dust remover, the coarse screen bar and the coarse screen bar It can be suitably used for replacing coarse screen bars with fine screen bars arranged in parallel.

J0 Bar Screen Dust Collector (Before Renovation)
J Bar Screen Dust Collector (After Renovation)
J 'Bar screen type dust collector (comparative example)
S0 Bar Screen (Before Renovation)
S coarse and fine bar screen (after renovation)
S 'coarse and fine bar screen (comparative example)
10 Screen Bar M0 Screen Bar Eye Width T0 Screen Bar Board Thickness W0 Screen Bar Width 1 Coarse Bar Screen 11 Coarse Screen Bar M1 Coarse Screen Bar Eye Width T1 Coarse Screen Bar Board Thickness W1 Coarse Screen Bar Width 2 Fine Bar Screen 21 Fine Screen Bar M2 Fine Screen Bar Eye 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 renovation)
31 'rake board (comparative example)
32 Comb like rake (comparative example)
33 Guide Rail 4 Apron 51 Through Bolt 52 Distance Piece 61 Wiper 62 Shoot 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 at the top of the bar screen, and scraping dust captured on the bar screen by moving along the bar screen and the apron Method of modifying a bar screen type dust remover for replacing a bar screen in a bar screen type dust remover with a rake with a coarse / fine bar screen configured by arranging a coarse screen bar and a fine screen bar in parallel In the above, the rear end edge of the fine screen bar that constitutes the coarse and fine bar screen is located on the inflow side of the front end position of the apron and the rear end edge of the screen bar that constitutes the bar screen of the bar screen type dust remover before modification In particular, the coarse and fine bar screen was installed to Repair method of the bar screen type dust collector to be.   2. A method of repairing a bar screen type dust remover according to claim 1, wherein a tip trajectory of the rake before the renovation and a tip trajectory of the rake after the renovation do not change.   The coarse / fine bar screen is positioned with the front edge of the coarse screen bar on the inflow side from the front edge of the fine screen bar, the rear edge of the coarse screen bar on the outflow side of the rear edge of the fine screen bar The method for repairing a bar screen type dust remover according to claim 1 or 2, wherein the method is configured to be performed.   The rake may be configured by including a flat rake plate having a flat tooth formed between a coarse screen bar of a coarse / fine bar screen and a flat screen bar inserted between the fine screen bars. Or the repair method of the bar screen type dust collector as described in 3.

Images