JPH03115611A - Dust removing device - Google Patents

Abstract

PURPOSE:To enable take-in of water with a small difference of head by joining a frame on which dust storage bucket is mounted on the upstream side in the lower section in a link chain, and entirely covering a plural number of nets which are connected shrinkingly to bar frames which are arranged in parallel. CONSTITUTION:An upper beam 15 and a lower beam 17 are connected together by side plates 19, 19 in a frame 4 to form a rectangle. A plural number of bar 30 of the frame 4 are installed in breadth direction at an equal space pitch on the upstream side of water channel. The pitch space of bars 30 is set in the range of about 50 to 100mm, a dust bucket 21 is arranged in the lower section of the frame 4 and the size of mesh which covers the inside surface of the frame 4 is about 6 to 30mm. Collected dust is passed through an upper sprocket 1 and discharged into a trough 10 via a guide plate. In the case of emergency when a large quantity of jellyfish flows in, a net frame 50 of the frame 4 is folded, and operation is carried out by applying a hook. Thus, it is possible to ensure the minimum amount of water intake even in the case of emergency.

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 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 A link chain is provided on both sides, and a bar screen or wire mesh is installed perpendicularly or almost perpendicularly to the flow direction for each link of the link chain, and the water is caught in the mesh by rotating the link chain. There are structures that remove dust 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 vertical cross-sectional view (a) and a front view (b) of a frame body having a bucket portion. ).

In FIG. 3, 1 is the upper sprocket foil, 2 is the lower sprocket foil, and 3 is both sprocket foils 1.
2 is a link chain mounted in an endless manner; 4 is a frame body attached to the link chain 3 and has a bucket section for storing captured garbage in the lower part; 5 is an upper sprocket wheel via a transmission chain 6 and a chain wheel 7; 1 is a power device that transmits power, 8 is the shaft of the upper sprocket wheel l, 9 is a trough 10
11 is a housing of the garbage removal device, 12 is a flow channel, and arrow F indicates the direction of the flowing water. Frame 4
As shown in Fig. 4, is attached to each pitch of the link chain 3, and 14 is a mesh body, which is made of a wire mesh or a large number of bars arranged in the shape of a spade, and is designed to remove dust, etc. from flowing water. This is a member that prevents this and also scoops it up. 1
5 is an upper beam provided at the upper end of the net body 14;
The upper beam 5 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 the mesh body 14 is integrally fixed to the side thereof through a mounting plate 16. Reference numeral 17 denotes a lower beam having a U-shaped cross section and provided at the lower end of the net body 14, and this lower beam 17 rotatably covers the upper part of the upper beam 15 of the frame body 4 adjacent to the lower part of the lower beam 17. The frame body 14 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 body 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 integrally fixed to the left and right end faces of the 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 the port 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 lower front part of the net body 14, and its left and right ends are connected to the support plate 2.
It is integrally fixed to the side plate 19 via 2. Note 6
0 is a spray pipe installed on the back of the descending net 14, which sprays water onto the back of the net 14 as shown by the chain line to remove dust adhering to the net 14. It is. 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, and the upper tin It becomes horizontal at the top of the rocket 1, then turns around and descends.

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 and the guide plate 9, and is discharged into the trough IO. On the other hand, the dust adhering to the net body 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 normally driven by an upper sprocket wheel l having about six teeth as shown in FIG. Note that the L arrow indicates the link chain driving direction.

[Problem to be solved by the invention] In recent years, as the amount of water intake has increased, the width of the waterways has become wider, and there has been a tendency for the amount of debris floating in the waterways to increase.
When a large amount of dust such as water matrix floods into a site, it exceeds the processing capacity of the installed dust removal equipment, and the dust cannot be processed completely, causing water-permeable parts of the frame such as a mesh frame or bar frame to become inundated. The system gradually became clogged and eventually became unable to secure 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 water intake.

However, if such a situation occurs during the electricity demand period,
At the power plant, the supply of electricity could not keep up with the demand for electricity, resulting in a power outage, which was a serious emergency for the public.

[Means for Solving the Problems] The present invention solves the above-mentioned problems and prevents abnormalities before and after due to overload of the garbage equipment when a large amount of garbage such as water bodies is temporarily generated (hereinafter referred to as "emergency"). In order to eliminate the water level difference, a frame body for collecting dust is joined to an endless link chain, a dust bucket for storing dust is installed at the lower upstream side of the frame body, and the link chain is connected to a pair of upper and lower sprocket foils. In the dust removal device driven through the frame, the entire surface of the frame is formed by vertically parallel bar frames,
and.

A plurality of net frames each having a net stretched thereon are telescopically connected, and are disposed on the upstream side of the bar frame so as to substantially cover the entire surface of the frame.

[Function] In the present invention, a wide bar row is fixed on the entire surface of the frame body, and a stretchable net body consisting of a plurality of mesh frames is provided on the entire upstream side of the bar row. It is possible to completely collect even the most minute dust with the net. On the other hand, in the event of an emergency such as a large inflow of water, the net is folded and the only frame through which running water passes is the bar frame, allowing water to pass through, thereby minimizing the water level difference between upstream and downstream. It is possible to ensure equipment safety and water intake.

[Example] Examples of the present invention will be described in detail below.

Figures 1 and 2 show an embodiment of the dust removal device according to the present invention, and Figure 1 shows a plurality of mesh frames in which bar rows are fixed on the entire surface of the frame body and a mesh body is stretched over the frame body. For example, in addition to being telescopically connected by No. 3, it is disposed on the second stream side of the bar row so as to cover almost the entire surface of the frame;
FIG. 1(a) is an enlarged side sectional view of the main part, FIG. 1(b) is an enlarged front view of the main part, and FIG. 2 is an enlarged plan view of the main part taken along line II-n in FIG. 1(a).

In FIGS. 1 and 2, the frame 4 forms a rectangle in which an upper beam 15 and a lower beam 17 are connected by side plates 19, 19. A plurality of bars 30 are erected and arranged at approximately equal pitches in the width direction of the frame. Further, on the upstream side of the row of bars 30, a plurality of mesh frames 50 are provided covering the entire surface of the frame body.
will be placed. That is, as shown in FIG.
A mesh frame 50 with a mesh body 14 having a mesh size of 6 to 30 mm in the center is attached to No. 1 55 bolted or welded to a rib 56 fixed to the side plate 19 of the A plurality of mesh frames 50 are attached to substantially cover the inner surface of the frame body 4.

With the above configuration, the net frame 50 can be stretched to cover the inner surface of the frame body or folded (as shown by the two-dot chain line in FIG. 2). It is possible to obtain it.

A hook (not shown) is attached between the free end of the screen frame 50 and the side plate 19 so that the screen frame 50 can be held in any state.

As described above, the garbage bucket 21 is provided at the bottom of the frame 4 via the support plate 22. Furthermore, garbage bucket 2
For 1, ordinary wire mesh, punched metal, etc. may be used.

The frame body 4 configured as described above is joined by fastening the side plates 19 and the link chain 3a with bolts 20 at the left and right ends of the frame body 4. Incidentally, the pitch interval of the bars is appropriately selected in the range of 50 to LOOmm, taking into consideration the size of the dust in the flowing water and the passage of the water matrix.

In addition, it was practically preferable to select the mesh size of the net in the range of 6 mm to 30 mm.

Bar and screen (wire mesh) configured as above
To explain the operation of a dust removal device having a frame body consisting of a (Towards the left of the figure) Relatively large pieces of dust floating in the flowing water or on the surface of the driftwood, such as water matrix and pieces of wood, first come into contact with the net 14 in the front, and then move downward according to the upward movement of the dust removal device. Move and garbage bucket 21
After being stored in the lower beam 17 and moving downward as well, the lower beam 17
It is stored in the upper surface of the garbage bucket 21 or the space (referred to as the bucket part) formed by the garbage bucket 21 and the inner surface of the net body 14.

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. via trough 10
discharge to.

On the other hand, in an emergency when a large amount of water carrier flows in, the net frame 50 of each frame 4 is folded and hooked, and the operation is continued.

In this case, the water matrix that sometimes flows in large quantities passes through the gap between the bars 30 placed at the rear stage and flows downstream, but the driftwood is much larger than the gap between the bars.

/12i Algae or garbage such as plastic waste is captured by the bar row 30 and removed.

In this way, in an emergency such as when a large amount of water matrix is generated, the amount of dust in the flowing water is far greater than that of a normal dust removal device, and the mesh 1 of the frame 4 is continuously raised and rotated.
4, and the passage of the running water itself to the dust removal device is greatly obstructed. 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, the net body 50 is made to have a stretchable structure, so that in an emergency, the water flow can be passed only through the widely spaced bar rows 30 without using the net body 50. 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, a telescopic mesh frame is provided on the upstream side of a bar row with a fixed frame body, so that it can be used in the event of a so-called emergency, when a large amount of dust in running water temporarily increases. In this case, the water stream can pass only through the bar frame without passing through the mesh frame, so that most of the large amount of garbage can pass through the bar frame. Therefore, the water level difference that occurs 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 amount of water required can be secured, allowing continuous stable operation, increasing the reliability of equipment use, and improving equipment maintenance and operation.

[Brief explanation of drawings]

1 to 2 are partially enlarged views showing an embodiment according to the present invention, in which FIG. 1(a) is a longitudinal cross-sectional view, FIG. 1(b) is a front view, and FIG. (a) It is a top view of No. xr-11. Figures 3 and 4 show examples of conventional dust removal equipment,
Figure 3 is an overall vertical sectional view, Figure 4 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...frame, 5
...Power device, 6...Transmission chain 7.7...Chain wheel, 14...
Net body, 15... Upper beam, 17...
... Lower beam, 21 ... Garbage bucket, 30
...Bar (bar row), 50...Mesh frame
, 55... is the number, 56... is the rib. F: Flow direction of water, L: Drive direction of link chain.

Claims (1)

[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 plurality of mesh frames each having a net stretched thereon are connected in a telescopic manner, and substantially the entire surface of the frame is formed by vertically parallel bar frames. A dust removal device characterized in that the dust removal device is covered and disposed on the upstream side of the bar frame.