JPH03103527A - Dust collector - Google Patents

Abstract

PURPOSE:To minimize the difference in the water level and secure the water- intake by joining a dirt collecting frame body with a link chain, providing a dirt storing bucket to the upper stream side of the lower part, and providing a net body capable of loading and unloading to bars arranging in rows lengthwise and the upper stream side of the bars. CONSTITUTION:In a frame body 4, an upper beam 15 and lower beam 17 are connected with side plates 19 and 19 to form into a rectangle, and a plurality of bars 30 having inside measure of the frame body 4 are provided to the upper stream side of a waterway from the lower beam 17. An interval of bar pitches is selected within range of 50-100mm, and a mesh of a net body is selected within range of 6-30mm in accordance with the size of a dirt. After that, a net frame 50 stretching the net body 14 upon the whole surface of the frame body at the upper stream side is slided sideways to a space specified by guide frames 51 and 52 mounted between up and down beams 15 and 17 to load. According to the constitution, jellyfishes pass through the bar rows to keep difference in the water-level between upper and lower streams in narrow, and water-intake can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust removal device for removing dust from seawater or river water, and particularly to a structure for minimizing the difference in water level before and after the dust removal device. [Prior Art] Conventionally, commonly used dust removal devices have been widely used in industrial water canals or waterways for taking cooling water in power plants, etc., and the most well-known type is Link chains are provided on both sides, and for each link of this link chain, a bar screen or wire mesh is installed perpendicularly or almost perpendicularly to the flow direction, and by rotating it, the mesh can be caught on the mesh. There are structures that remove debris from the waterway. 3 and 4 show one embodiment of a conventional dust removal device, FIG. 3 is an overall schematic diagram, and FIG. 4 is a detailed longitudinal cross-sectional view (a) and a front view (b) of a frame body having a bucket portion. ). In Fig. 3, 1 is an upper sprocket foil, 2 is a lower sprocket foil, 3 is a link chain attached to both sprocket wheels 1.2 in an endless manner, and 4 is attached to the link chain 3, which collects the collected garbage at the bottom. 5 is a power unit that transmits power to the upper sprocket wheel l via a transmission chain 6 and a button wheel 7; 8 is a shaft of the upper sprocket wheel 1; 9 is a trough 10 for storing garbage. A guide plate for guiding, ti indicates the housing of the dust removal device, 12 indicates the flow channel, and arrow F indicates the direction of the flowing water. As shown in FIG. 4, the frame body 4 is attached to every pitch of the link chain 3,
Reference numeral 14 denotes a mesh body, which is made of a wire mesh or a large number of bars arranged in the shape of a plow, and is a member that prevents and scoops up dirt and debris in the flowing water. l5 is the net body 1
This upper beam 15 is made of a section steel such as a pipe or channel steel having a suitable diameter according to the width of the waterway, and the upper beam 15 is provided at the upper end of the pipe 15 through a mounting plate 16 on its side. The net body 14 is integrally fixed. Reference numeral 17 denotes a lower beam having a U-shaped cross section and provided at the lower end of the mesh body l4, and this lower beam 17 rotatably covers the upper part of the upper beam l5 of the frame body 4 adjacent to the lower part of the lower beam 17. The frame l4 is integrally fixed via a mounting plate 18 which is provided and protrudes from the upper part of the mounting plate 18. Reference numeral 19 denotes a side plate that holds the net l4 from its side, and this side plate 19 has a width wider than the link width of the link chain 3, as shown in FIG. They are integrally fixed to the left and right end faces, respectively. In other words, the side plate 19, the upper beam 15, and the lower beam 17 form the frame 4. This frame body 4 is fixed to the link chain 3 by fixing its side plate 19 to the side surface of the link 3a with a pole 20. Reference numeral 21 denotes a garbage bucket protruding from the lower beam l7. It is integrally fixed to l9. In addition, 60 is a spray pipe provided at the back of the net 14 that is descending, and is used to remove dust adhering to the net 14 by spraying spray water onto the back of the net 14 as shown by the chain line. It is something.

Therefore, the garbage floating in the flow is first blocked by the net 14, and as the link chain 3 rises, it is scooped up by the garbage bucket 21, and the garbage bucket 21 containing the garbage further rises. It becomes horizontal at the top of upper sprocket 1, then turns around and descends. Then, the garbage existing in the garbage bucket 2l falls due to its gravity, is guided by the outer surface of the garbage bucket 21 and the guide plate 9, and is discharged into the tiger 710. On the other hand, the dust adhering to the net 14 is separated by the spray water and is discharged into the trough 10 via the outer surface of the dust bucket 21 and the guide plate 9 as described above. The endless link chain 3 to which the frame body 4 constructed as described above is joined is usually driven by an upper sprocket wheel l having about six teeth as shown in FIG. Note that the L arrow indicates the link chain drive direction. [Problem to be solved by the invention] In recent years, as the amount of water intake has increased, the width of waterways has become wider, and the amount of debris floating in waterways has tended to increase.
When a large amount of dust such as water matrix floods in, it exceeds the processing capacity of the installed dust removal equipment, and the dust cannot be processed completely, and the water-permeable parts of the frame such as the mesh frame or bar frame gradually become inundated. The blockage eventually became impossible to ensure sufficient water flow, leading to a situation where the difference in water level before and after the dust removal equipment rose rapidly. For this reason, if the water level difference before and after the dust removal equipment exceeds a certain value, the pressure of the flowing water applied to frames such as mesh frames and bar frames will become excessive and cause structural damage to the equipment. Measures were taken such as limiting the amount of water taken. However, if such a situation occurs during the electricity demand period,
At power plants, the supply of electricity could not keep up with the demand for electricity, resulting in power outages, a serious public emergency. [Means for Solving the Problems] The present invention solves the above problems and prevents abnormalities before and after due to overload of the dust removal device when a large amount of dust such as water matrix temporarily flows in (hereinafter referred to as "emergency"). In order to eliminate the water level difference,
In the invention, a frame body for collecting dust is joined to an endless link chain, a dust bucket for storing dust is provided at the lower upstream side of the frame body, and the link chain is connected to the link chain through a pair of upper and lower subrocket foils. In the dust removal device driven by We have set up a structure. Further, in the second invention, the bar gap of the bar frame of the dust removal device of the first invention is set to 5.
0mm ~ OOmm, force) and the mesh of the mesh is 6mm.
~30mm.

[Function] In the present invention, a wide bar row is fixed on the entire surface of the frame body, and a removable net is provided on the entire upstream side of the bar. It can be completely recovered. On the other hand, in the event of an emergency such as a large inflow of water carriers, the net is removed and only the par frame is used to allow water carriers to pass through, thereby minimizing the water level difference between upstream and downstream and ensuring equipment safety. This makes it possible to secure water intake. Second
In the invention, the bar gap was set to 50 mm to 100 mm, considering the size of the conventional water base and judging from the fact that it was convenient in practice to select the bar gap and the mesh within this range.
The mesh size of the mesh was 6 mm to 30 mm. [Example] Hereinafter, an example of the wooden invention will be described in detail.

Figures 1 and 2 show an embodiment of the dust removal device according to the present invention, and Figure 1 shows a mesh frame in which rows of bars are stretched over the entire surface of the frame and a mesh is stretched across the entire surface of the frame. It is attached to the upstream side of the bar frame, which is a specified space, by sliding it from the
) shows an enlarged side sectional view of the main part, and Fig. 1(b) shows an enlarged front view of the main part. Fig. 2 is an enlarged side sectional view of the main part of another embodiment, in which the net body is attached diagonally from above. The embodiments shown in FIGS. 1 and 2 both show partially enlarged views of the frame of the dust removal device, and in FIG.
and the lower beam 17 are connected by side plates 19 and 19 to form a rectangular shape, and a plurality of pars 30 of the inner dimensions of the frame body 4 are erected from the lower beam 17 on the upstream side of the waterway, and the width direction of the frame body is Arrange them at approximately equal pitches. Furthermore, on the upstream side of the row of bars 30, a net frame 50 with a net l4 stretched over the entire surface of the frame is defined by guide frames 51 and 52 attached to the upper and lower beams 15 and 1711J. It is structured so that it can be installed by sliding it from the side into the space where it is placed.

Further, in the embodiment shown in FIG. 2, the guide frame 51, 52
The screen frame 50 is installed in a direction slightly diagonally outward from the vertical direction, and the screen frame 50 is installed by lowering the screen frame 50 diagonally from above. 54 is a stopper after the mesh frame is attached, and is fixed with a set screw. In either case, the garbage bucket 21 is provided on the upstream side of the lower part of the frame body 4 via the support plate 22 as described above. I! The M garbage bucket 21 may be made of ordinary wire mesh, punched metal, or the like.

The frame body 4 configured as described above is joined by fastening the side plates 19 and the link chain 3a at the left and right ends of the frame body 4 using ports 20. In addition, the pitch interval of the bars is appropriately selected within the range of 50N100mm, taking into account the size of the dust in the flowing water and the passage of the water matrix. Also, the mesh size of the net is 6mm.
It was practically preferable to select it within the range of ~30 mm.

In order to maintain the movable mesh frame 50 in the attached state, fastening means using bolts and wing nuts, a stopper mechanism using lever rotation, or the like may be appropriately employed.

Bar and screen (wire mesh) configured as above
To explain the operation of a dust removal device having a frame body, in normal times (when the amount of dust generated is not large), the net body 50 is attached between the guide frame 5l and the guide frame 52 as shown in the figure, The first embodiment to the second embodiment are stacked vertically on the bar row 30.
In both embodiments, relatively large pieces of debris floating in the flowing water or on the surface of the flowing water flowing from the upstream side of the waterway (to the left in the figure), such as water matrix and pieces of wood, first come into contact with the net member 14 in the front, and It moves downward according to the rising action of the dust removal device, is stored in the garbage bucket } 21 , and after moving downward as well, the space defined by the upper surface of the lower beam 17 or the garbage bucket 21 and the inner surface of the net body 14 ( (referred to as the bucket section). After the frame body 4 passes through the upper sprocket 1 and is reversed, the collected dust is sprayed by the spray 60 as shown in FIG. It is discharged to trough 10 via On the other hand, in an emergency situation when a large amount of water carrier flows in, the net frame 50 of each frame 4 is removed from the frame 4 and operation continues. In this case, a large amount of water temporarily flowing in flows downstream through the gap between the bars 30 placed in the latter stage, but debris such as driftwood, /fg algae, or plastic waste, which is much larger than the gap between the bars, will pass through the gap. captured by column 30 and rejected. In this way, in an emergency such as when a large amount of water is generated, the amount of dust in the flowing water is much larger than that of the dust removal device under normal dust removal measures, and almost the entire surface of the net 14 of the frame 4 that is continuously rotating upward is removed. This greatly obstructs the passage of the running water itself to the dust removal device. As a result,
The water level difference that occurs before and after the dust removal device is much larger than the normal water level difference, and the water level on the upstream side is abnormally high, whereas the water level on the downstream side is abnormally low. Therefore, in the present invention, since the net body 50 is constructed to be movable, in an emergency,
By removing the net 50, it is possible to allow the water flow to pass only through the widely spaced bar rows 30. As a result, the water carrier can pass through this row of bars and keep the water level difference between upstream and downstream low, making it possible to adequately respond to emergencies. [Effects of the Invention] In the present invention, since a removable mesh frame is provided upstream of the fixed frame bar row, it is possible to prevent the so-called emergency situation in which the amount of dust contained in running water temporarily increases. In this case, the water flow can only pass through the bar frame without passing through the mesh frame, so most of the large amount of garbage can pass through the bar frame. Therefore, the water level difference before and after the dust removal device can be kept as small as possible. Therefore, the load on each component of the dust removal device can be reduced, and damage to the device can be prevented, improving safety. Also,
Even in an emergency, the minimum necessary water intake can be ensured, allowing continuous stable operation, increasing reliability in equipment use, and improving equipment maintenance, management, and operational operability.

[Brief explanation of drawings]

1 to 2 are partially enlarged views showing different embodiments of the present invention, and FIGS. 1(a) and 2 are longitudinal sectional views,
Figure 1(b) is a front view. Figures 3 and 4 show examples of conventional dust removal equipment, with Figure 3 being an overall longitudinal sectional view, and Figure 4 being an overall vertical sectional view.
The figures are partially enlarged views of the frame, with (a) being a side view and (b) being a front view. 1... Upper sprocket foil,
2...Lower sprocket wheel, 3...
・Link chain, 3a...Link, 3b...Roller, 4...Frame, 5...
Power device, 6... Transmission chain, 7...
...chain wheel, l4...net body, 15...
... Upper beam, l7 ... Lower beam, 2 l ... Garbage bucket, 30 ... Bar (bar row), 50 ... Net frame, 51・
...Guide frame, 52...Guide frame, F...Flow direction of flowing water, L...Driving direction of link chain.

Claims (2)

[Claims] (1) A frame body for collecting dust is joined to an endless link chain, a dust bucket for storing dust is provided on the lower upstream side of the frame body, and the link chain is driven via a pair of upper and lower sprocket wheels. In the dust removal device, the entire surface of the frame is formed by vertically parallel bar frames,
A dust removal device characterized in that a net covering the entire surface of the frame is removably provided on the upstream side of the bar frame. (2) Claim 1 in which the bar gap of the bar frame body is 50 mm to 100 mm, and the mesh of the net body is 6 mm to 30 mm.
dust removal equipment.