JPH0333314A - Dust collector - Google Patents

Abstract

PURPOSE:To prevent the derailment of an endless chain by alternately directing the flanges of the roller of the chain in the opposite directions and holding the roller by a front guide rail and a rear guide rail in the turning section of the chain. CONSTITUTION:Flanges 3-2 installed to the rollers 3-1 of an endless chain 3 are mounted so that directions are opposed one by one in the rollers 3-1 except the roller 3-1 set up to a rake 2. A mounting plate 3-7 at the end section of the rake 2 is fitted firmly to a thick link plate 3-5 installed to the chain 3 by rake mounting pins 3-6. The rollers 3-1 of the chain 3 are held from upper and lower sections by a front guide rail 4-1 and a rear guide rail 4 in a turning section, in which the chain 3 is rotated from lowering to elevation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust removal device that captures and removes dust in waterways.

[Conventional technology]

Conventionally, waterways such as various pumping stations, sewage treatment plants, water supply/industrial water intakes, water intakes for hydropower/thermal power plants, etc. have been equipped with dust removal devices to collect and remove dust from the waterways. developed and put into practical use.

As this type of dust removal device, the applicant of the present application has, for example,
-137365 (Japanese Patent Publication No. 56-38727).

This kind of conventional dust removal device fixes a fixed screen in which long plates or rods are arranged in parallel in a waterway, and guides guide rails on both sides of this fixed screen, and guides an endless chain to the guide rails. In addition, both ends of a long plate-like rake are attached to the endless chain.

By rotating and driving the drive wheel attached to the upper end of this endless chain, the rake is raised just before the upstream side of the fixed screen, and the garbage collected on the front surface of the fixed screen is pulled upward. and discharge it outside.

[Problem to be solved by the invention]

However, in such conventional dust removal equipment, when the chain is stretched due to wear of the chain or the load applied to the chain, or when a large load such as wood or a large amount of garbage is caught in the rake, When a large shock occurs to the chain, the chain will come off the guide rail and derail, causing a problem.

Once this chain is derailed, it is difficult to recover.

This chain derailment is particularly likely to occur at the turning point where the chain attempts to turn from descending to ascending at the lower end of the fixed screen, but chain derailment at this point is also the deepest part of the water, and recovery work is difficult. It was extremely difficult.

In order to solve the above problem, a flange made of a disc with a larger diameter than the roller is attached to one side of the roller of the chain that engages with the guide rail, or a flange is attached to both sides of the roller. was used.

However, when using a chain with a flange attached to one side of the roller, the chain will not derail toward the side where the flange is not attached, but it will still derail toward the side where the flange is attached. there were.

Furthermore, by using a chain with flanges attached to both sides of the rollers, even if the chain was stretched a little or heavy debris got caught in the rake, chain derailment accidents could be prevented to a certain degree. However, since the roller having this structure is not a standard type, there is a problem in that it is expensive and hinders cost reduction.

In addition, conventionally, when heavy dust gets caught in the rake of this dust removal device, the rake turns under the load and the tip of the rake tilts downward, causing the collected dust to fall off the rake. Not only would this shock cause the chain to become derailed, which caused the problem.

The present invention has been made in view of the above points, and even if the chain is extended, derailment of the chain is unlikely to occur, and debris caught on the rake is unlikely to fall off the rake, making it difficult to cause chain derailment. The purpose of the present invention is to provide a dust removal device.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a fixed screen in which a large number of long plates or rods are arranged in parallel in a waterway, a rake that pulls up dust that has landed on the front surface of the fixed screen,
An endless chain that supports both ends of the rake, and a guide rail that guides a roller portion of the endless chain so that the rake is raised along the front side of the fixed screen and lowered on the back side of the fixed screen. In the dust removal device, a plate-shaped flange is provided on one side of the roller of the endless chain, and the direction of the flange is alternately changed for each roller or plural rollers, and both ends of the rake are attached to the endless chain. The guide rail is firmly fixed to a thick link plate so as not to swing, and the guide rail is composed of a front guide rail that guides the endless chain upward and a rear guide rail that guides the endless chain downward. The rear guide rails are configured to face each other so as to sandwich the rollers of the endless chain from above and below at the turning portion of the endless chain at the lower end of the fixed screen.

[Effect]

As described above, the flanges of the rollers of the endless chain are alternately oriented in opposite directions one or more times, and the rollers are sandwiched between the front guide rail and the rear guide rail at turning points where derailment is particularly likely to occur. Therefore, the endless chain can be held securely on the guide rail.

In addition, since the link plate is thick and the rake is firmly fixed to it, the rake will not swing even if the debris caught on the rake is heavy, making it difficult for the debris to fall off the rake. The endless chain will not be derailed due to the shock of falling debris.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

First, the overall configuration of the dust removal device according to the present invention will be explained.

FIG. 4 is a perspective view showing the overall structure of the dust removal device according to the present invention, FIG. 5 is an enlarged perspective view of the main part of the dust removal device showing the vanguard screen 13, and FIG. 6 is a perspective view of the dust removal device. FIG. 3 is a side view showing the relationship between the fixed screen 1, rake 2, endless chain 3, and chain running frames 5 and 6 of FIG.

As shown in FIGS. 4 and 6, this dust removal device consists of a fixed screen 1 having a large number of long plates 1a arranged in parallel in a waterway.
, a rake 2 (four rakes are installed in this embodiment) that pull up dust held in front of the fixed screen 1, and endless chains 3, 3 that support both ends of the rake 2.
It is equipped with.

And these endless chains 3, 3 have a drive wheel 1 at their upper end.
7 is engaged. Note that this drive wheel 17 is a drive unit 100.
driven by.

Further, a comb-shaped avant-garde screen 13 is arranged near the lower end on the front side (upstream side) of the fixed screen 1, and the lower end thereof is fixed to the bottom surface of the waterway.

This avant-garde screen 13 is used to collect debris that is about to flow out from between the lower end of the fixed screen 1 and the bottom of the waterway.

Next, the overall operation of the dust removal device will be explained.

First, water flowing from the direction of arrow A shown in Figs.
3 and flowing downstream, and the dust that has flowed together with the water is retained by the fixed sufnoun 1 or the avant-garde screen 13.

When the drive unit 100 is driven to rotate the drive wheel 17, the endless chain 3 rotates, and as a result, the endless chain 3
The rake 2 attached to it will move.

Since the rake 2 moves upward from the bottom end of the fixed screen 1 near the front side of the fixed screen 1, the garbage on the front side of the fixed screen 1 is conveyed upward. Then, when the rake 2 turns over the drive wheel 17,
The garbage falls onto a garbage carrying conveyor 21 arranged below and is carried out.

As shown in FIG. 5, this rake 2 has a raking claw 2 for raking up the garbage between the screens 13 and on the front side.
b and each plate 1a of the fixed screen 1 is provided with a scraping claw 2a for scraping out dirt that has gotten into the space between the plate 1a and the plate 1a of the fixed screen 1.

Further, 1-1 shown in FIG. 4 is a beam that serves as a screen support for integrally fixing each plate 1a of the fixed screen 1. In this screen support, chain running frames 5 and 6 are also fixed to both ends of the beam 1-1.

Further, 7 shown in FIGS. 4 and 6 is a back plate to prevent the garbage pulled up by the rake 2 from falling, and 9 shown in FIG. 6 is attached to the upper part of the shaft 18 of the drive wheel 17. This is the shaft cover that has been removed.

Next, FIG. 3 is a diagram showing the main parts of the dust removal device taken along the line B--B shown in FIG. 6.

As shown in the figure, the rollers 3-1 of the endless chain 3 are arranged between the chain running frames 5 and 6. The rollers 3-1 are guided on the front side (upstream side) while contacting the front guide rail 4-1 attached to the chain running frame 5, and on the rear side (downstream side) are guided by the front guide rail 4-1 attached to the chain running frame 5. It is guided while coming into contact with the rear guide rail 4-2 attached to 6.

Next, the present invention will be explained in detail.

FIG. 2 is a diagram showing the relationship between the endless chain 3, chain running frames 5, 6, and guide rails 4-1, 4-2 in the lower part of this dust removal device.

As shown in the figure, on the upstream side of the chain running frames 5 and 6, the front guide rail 4-1 is attached to the chain running frame 5. Further, on the downstream side of the chain running frames 5 and 6, the rear guide rail 4-2 is attached to the chain running frame 6.

Here, the front guide rail 4-1 and the rear guide rail 4-
2 is a turning section 12 where the chain 3 turns from descending to ascending;
, are provided overlappingly above and below. Therefore, in this part, the rollers 3-1 of the chain 3 are held between the upper and lower sides, so that derailment of the endless chain 3 in this part can be prevented.

Next, FIG. 1 is a diagram showing the relationship among the rake 2, the endless chain 3, and the front guide rail 4-1 when the rake 2 moves up the upstream side of the fixed screen 1. As shown in the figure, the endless chain 3 has a structure in which rollers 3-1 are connected by a standard link plate 3-4. Furthermore, a disk-shaped flange 3-2 having a diameter larger than that of the roller 3-1 is provided on one side surface of the roller 3-1.

Further, the mounting plate 3-7 at the end of the rake 2 is firmly attached to the link plate 3-5 by a plurality of rake attachment pins 3-6.

Here, the link plate 3-5 is thicker than the standard link plate 3-4 so that it can sufficiently withstand the load applied to the rake 2.

In this way, the rake 2 is firmly attached to the sturdy link plate 3-5 by the plurality of rake attachment pins 3-6, so the rake 2 will not swing relative to the endless chain 3. do not have.

In addition, in the same figure, the flange 3- provided on the roller 3-1
2 are attached so that the directions of each roller are reversed except for the roller 3-1 to which the rake 2 is attached.

Therefore, even if the roller 3-1 moving on the front guide rail 4-1 moves from side to side, if it moves to the right, the left flange 3-2 will engage with the front guide rail 4-1. However, when it moves to the left, the right flange 3-2 engages with the front guide rail 4-1, so this endless chain 3
This prevents the train from derailing from the front guide rail 4-1.

In the above embodiment, the flange 3 of the roller 3-1
-2, except for the part where the rake 2 is attached, are alternately oriented in opposite directions, but the present invention is not limited to this. It may be alternately reversed.

〔Effect of the invention〕

As explained in detail above, according to the dust removal device according to the present invention, the flange 3-2 of the roller 3-1 of the endless chain 3
The rollers 3-1 are arranged in opposite directions alternately one or more times, and the roller 3-1 is sandwiched between the front guide rail 4-1 and the rear guide rail 4-2 at the turning section 12 where derailment is particularly likely to occur. Therefore, even if a shock to the rake 2 or slack in the endless chain 3 occurs, it is possible to reliably prevent derailment of the endless chain 3, which is an excellent effect.

In addition, the link plate 3-5 to which the rake 2 is attached is thicker than the other standard link plates 3-4, and since the link plate 3-5 is firmly fixed to the rake 2, it does not get caught in the rake 2. Even if the garbage is heavy, there will be no looseness between the two mounting parts. Therefore,
Since the rake does not swing relative to the endless chain, the debris will not fall off the rake 2, and there is no risk that the endless chain 3 will derail due to the shock of the debris falling off. have an effect.

[Brief explanation of drawings]

Fig. 1 shows the relationship between the rake 2, the endless chain 3, and the front guide rail 4-1 when the rake 2 ascends upstream of the fixed screen 1, and Fig. 2 shows the endless chain 3 at the bottom of the dust removal device. 3 is a diagram showing the relationship between the chain running frames 5, 6 and the guide rails 4-1, 4-2, and FIG. 3 is a diagram showing the main parts of this dust removal device when cut along the line B-B shown in FIG. 6. , FIG. 4 is a perspective view showing the overall structure of the dust removing device according to the present invention, and FIG. 5 is a perspective view showing the vanguard screen 1 of this dust removing device.
FIG. 6 is a side view showing the relationship among the fixed screen 1, rake 2, endless chain 3, and chain running frames 5, 6 of the dust removal device. In the figure, 1...fixed screen, la...board, 2...
・Rake, 3... Endless chain, 3-1... Roller, 3-2... Flange, 3-4... Standard link plate, 3-5... Link plate, 4-1...・Front guide rail, 4-2...Rear guide rail, 12・
...The turning part.

Claims (1)

[Claims] A fixed screen having a large number of long plates or rods arranged in parallel in a waterway, a rake that pulls up dust that has landed on the front surface of the fixed screen, an endless chain that supports both ends of the rake, and an endless chain that supports the rake at both ends. A dust removal device comprising a guide rail that guides the roller portion of the endless chain so as to raise the front side of the fixed screen and lower the back side of the fixed screen. A flange is provided, the direction of the flange is alternately changed for each roller or rollers, and both ends of the rake are firmly fixed to thick link plates attached to an endless chain so as not to swing. Furthermore, the guide rail includes a front guide rail that guides the endless chain upward and a rear guide rail that guides the endless chain downward, and the front guide rail and the rear guide rail are the turning portion of the endless chain at the lower end of the fixed screen. A dust removal device characterized in that the rollers of the endless chain are opposed to each other so as to be sandwiched from above and below.