JPH0340901Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dust removal device for removing dust from seawater or river water, and particularly relates to a structure for minimizing the difference in water level before and after the dust removal device.

[Prior art] Conventionally, in commonly used dust removal equipment,
It is widely used for industrial water canals or waterways for intake of cooling water in power plants, etc., and the most well-known example is a link chain on both sides of the waterway, and a bar for each link of this link chain. There is a structure in which a screen or a wire mesh screen is installed perpendicularly or almost perpendicularly to the flow direction, and by rotating the screen, the debris caught on the screen is removed from the waterway.

4 and 5 show one embodiment of a conventional dust removal device, FIG. 4 is an overall schematic diagram, and FIG. 5 is a detailed vertical sectional view a and a front view b of a screen frame having a bucket portion.

In Fig. 4, 1 is an upper sprocket foil, 2 is a lower sprocket foil, 3 is a link chain mounted endlessly on both sprocket wheels 1 and 2, and 4 is attached to link chain 3 and captured at the bottom. 5 is a power unit that transmits power to the upper sprocket wheel 1 via a transmission chain and a chain wheel 7; 8 is a shaft of the upper sprocket wheel 1; 9 is a trough 10; 11 is a housing of the dust removal device, 12 is a flow channel, and arrow F indicates the direction of the flowing water. As shown in Fig. 5, the frame body 4 is attached to each pitch of the link chain 3, and 14 is the screen body, which is made of a wire mesh or a large number of bars arranged in the shape of a spade, and is This is a member that prevents dirt and debris and also scoops it up. Reference numeral 15 denotes an upper beam provided at the upper end of the screen main body 14. This upper beam 15 is made of a shaped steel such as a pipe or channel steel having a suitable diameter depending on the width of the waterway, and its center is located at the link chain. A mounting plate 16 is provided to be located at the center of the roller 3b portion of No. 3 and protrudes from the bottom thereof.
The screen main body 14 is integrally fixed through. Reference numeral 17 denotes a lower beam having a U-shaped cross section and provided at the lower end of the screen body 14, and this lower beam 17 rotatably covers the upper part of the upper beam 15 of the frame 4 adjacent to the lower part of the lower beam 17. Through a mounting plate 18 provided and protruding from the top thereof,
The frame body 14 is integrally fixed. Reference numeral 19 denotes a side plate that holds the frame 14 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. are each fixed integrally. In other words, the side plate 19, the upper beam 15, and the lower beam 17 form the frame 14. 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 bolts 20. Reference numeral 21 denotes a garbage bucket protruding from the lower beam 17. The garbage bucket 21 is provided so as to obliquely cover the front lower part of the frame 14, and its left and right ends are connected to the side plate 19 via the support plate 22. is integrally fixed to. Note that 23 is a spray pipe installed on the back of the descending screen 13, and is used to remove dust adhering to the frame 14 by spraying water onto the back of the screen 13 as shown by the chain line. be. Therefore, debris floating in the flow should first be removed from the frame 1.
4, 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, becomes horizontal at the top of the upper sprocket 1, and then turns over. and descend.

Then, the garbage existing in the garbage bucket 21 falls due to its gravity, is guided by the outer surface of the garbage bucket 21 of the lower screen and the guide plate 9, and is discharged into the trough 10. On the other hand, the dust adhering to the screen body 14 is removed by the spray water and discharged into the trough 10 via the outer surface of the dust bucket 21 of the lower screen 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 1 having about six teeth as shown in FIG. Note that the L arrow indicates the link chain driving direction.

[Problem that the invention aims to solve] 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.
Particularly in the event of a temporary or concentrated influx of large amounts of water mother or other debris, the processing capacity of the installed dust removal equipment will be exceeded, and the debris will not be able to be processed completely, resulting in The water area gradually became clogged, making it 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 the frame such as the mesh frame or bar frame will be excessive and cause structural damage to the equipment. Measures were taken such as limiting water intake.

However, if such a situation occurred during the period of electricity demand, the power supply at the power plant could not keep up with the demand for electricity, resulting in a power outage, which was 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 equipment 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, a dust removal device is provided in which a frame body equipped with a screen and/or bar for collecting dust is joined to an endless link chain, and the link chain is driven via a pair of upper and lower sprocket wheels. A bar is erected from the lower beam on the upstream side of the waterway of the frame, a screen is provided on the downstream side separated from the bar, and a discharge port for collected dust is provided between the upper end of the bar and the lower surface of the upper beam. has been established.

Further, the upper end of the bar is inclined toward the upstream side (outside) in order to facilitate the reversal of the frame, especially the discharge of the collected dust.

Furthermore, the entire bar was tilted upstream with respect to the frame.

[Function] The present invention has a structure in which bars are placed upright on the entire surface of the frame, and a screen is installed on the rear side of the frame at a distance from the row of bars, and the upper end of one row and the lower surface of the upper beam Since a discharge port for the collected dust was provided between the two, relatively large pieces of dust, such as water particles, contained in or drifting in the flowing water are collected and removed by the front row of bars, and then passed through the bar row. Relatively small pieces of dust (e.g. seaweed, algae, etc.) are collected by a screen installed on the rear surface, stored in the space between the bar row and the screen, rise up, pass through the upper pro-ket foil, and then are reversed. The water is then discharged out of the waterway from the outlet. Therefore, during operation, all of the dust in the flowing water does not cover the screen surface, so it is possible to prevent the water level difference before and after the dust removal device from becoming abnormally large.

[Example] Hereinafter, an example of the present invention will be described in detail.

Figures 1 to 3 show examples of the dust removal device according to the present invention. Figure 1 shows an example in which the bar rows are installed parallel to the height direction of the frame (first example), and The figure shows a row of bars installed parallel to the height direction of the frame, and
This is an example (second embodiment) in which only the upper end is tilted outward, and FIG. 3 shows an example (third embodiment) in which the bar rows are installed uniformly tilted outward.

The embodiments shown in FIGS. 1, 2, and 3 all show partially enlarged views of the frame of the dust removal device, and FIGS. 1a and 2a are longitudinal sectional views, and FIGS. Figure 2b shows a front view.

1 to 3, the frame 4 forms a rectangle in which an upper beam 15 and a lower beam 17 are connected by side plates 19, 19, and the lower beam 17 is slightly longer than the length of the frame 4 on the upstream side of the waterway. short multiple bars 3
0 are set upright and arranged at approximately equal pitches in the width direction of the frame. A discharge port 32 for collected dust is formed between the lower surface of the lower beam 15 and the top of the bar 30.

Further, on the downstream side of the frame body 4, a screen 14 that covers almost the entire surface of the rectangular frame body is fastened to the side surfaces of the upper beam 15 and lower beam 17 of the frame body 4 via a mounting plate 16 and a mounting plate 18 with bolts and nuts. Attach.

As described above, the garbage bucket 21 is provided on the upstream side of the lower part of the frame via the support plate 22.

The frame body 4 configured as described above has the side plates 19 and the link chain 3a connected by bolts 20 at the left and right ends of the frame body 4.
It is fastened and joined by. The spacing between the bars should be 20 to 100, taking into consideration the size of the debris in the flowing water.
Select as appropriate within the mm range. Also, select the mesh size of the screen within the range of 1/10 to 1/2 of the bar pitch.

The first embodiment (FIG. 1) is configured such that the bar 30 is erected in parallel with the frame 4 and its tip is inclined outward. Furthermore, in the third embodiment, the second
In this embodiment, a straight bar is attached so as to be inclined outward from the lower beam 17, instead of being inclined outward from the middle as in the embodiment.

To explain the operation of the dust removal device having a frame body consisting of a bar and a screen configured as described above, in the first to third embodiments, running water flowing from the upstream side of the waterway (downward in the figure) is used. Or relatively large pieces of dust floating on the surface of the flowing water, such as water matrix and pieces of wood, first come into contact with the front bar row 30, move downward as the dust remover moves upward, and are stored in the bucket section. . On the other hand, relatively small debris passes through the space between the bars and comes into contact with the screen on the downstream side. After similarly moving downward, it is stored in a space 34 formed by the upper surface of the lower beam 17, the screen 14, and the inner surface of the bar 30.

In this way, the collected dust is transferred to the fourth
As shown in the figure, while being sprayed by the spray 23, the garbage is discharged from the bucket part and the space 34 via the guide plate 9 to the trough 10.

In addition, in the second and third embodiments, compared to the first embodiment, it is easier to discharge the collected dust accumulated in the space 34 when the frame is reversed.

Therefore, in an emergency such as when a large amount of water matrix is generated, the amount of dust in the flowing water with a normal dust removal device far exceeds that of the dust removal device and covers almost the entire surface of the screen body of the frame 4 that is continuously rotating upward. As a result, passage of the flowing water to the dust removal device is greatly hindered. As a result, the water level difference that occurs before and after the dust removal device greatly exceeds 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, after removing large pieces of garbage using a row of bars,
Since it is possible to collect fine dust, so-called two-stage collection, it is possible to adequately deal with these emergency situations.

[Effects of the invention] In the present invention, a bar row is arranged on the upstream side of the frame of the dust removal device, and a screen is arranged on the downstream side, and the upstream bar first roughly removes large items from the garbage, and then small items are removed. Dust is captured by a screen on the downstream side, and all the collected dust is discharged out of the waterway when the frame is turned over, so it can be used even in so-called emergencies when the amount of dust in flowing water temporarily increases. Since the screen surface can be covered with a relatively small amount of dust, 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 amount of water intake can be ensured, enabling continuous stable operation, increasing the reliability of equipment use, and improving equipment maintenance, management, and operational operability.

[Brief explanation of the drawing]

Figures 1 to 3 are partially enlarged views showing different embodiments of the present invention, Figure 1a and Figure 2b.
is a longitudinal sectional view, and FIGS. 1b and 2b are front views. Figures 4 and 5 show an example of a conventional dust removal device, where Figure 4 is an overall vertical sectional view, Figure 5 is a partially enlarged view of the frame, a is a side view, and b is a front view. . 1... Upper sprocket foil, 2... Lower sprocket foil, 3... Link chain, 3a...
...Link, 3b...Roller, 4...Screen frame, 5...Power unit, 6...Conduction chain, 7...
Chain wheel, 14...Screen body, 30...Bar,
32...Discharge port, 34...Space, F...Flow direction of flowing water, L...Direction of driving the link chain.

Claims (1)

[Claims for Utility Model Registration] (1) A frame body equipped with a screen and/or bar for collecting dust is joined to an endless link chain, and the link chain is driven via a pair of upper and lower sprocket wheels. In the dust removal equipment that
A bar is provided upright from the lower beam on the upstream side of the waterway of the frame body, a screen is provided on the downstream side separated from the bar, and a discharge port for collected dust is provided between the upper end of the bar and the lower surface of the upper beam. A dust removal device characterized by: (2) The dust removal device according to claim 1, wherein the upper end of the bar is inclined toward the upstream side. (3) The dust removal device according to claim 1, wherein the entire bar is inclined toward the upstream side with respect to the frame.