JPH03100218A - Dust cleaner - Google Patents

Abstract

PURPOSE:To prevent the equipment from being broken, by arranging a second dust cleaner which connects a narrow bar gap and a broad bar gap, in parallel onto the side of a first dust cleaner having a fine screen mesh or the narrow bar gap. CONSTITUTION:In the ordinary case, a narrow bar gap part of a second dust cleaner 200 is directed to a watercourse, and a first dust cleaner 100 is driven. The dusts are collected by the screen frame 104 of the dust cleaner 100, and successively discharged by a screen body 14. In an emergent case in which a large quantity of jellyfish appear, the narrow bar gap region of the dust cleaner 200 is stopped at the position where an upper sprocket is set in center division form, and the broad bar gap region is opposed to the watercourse.

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 screen made of a bar screen or wire mesh is installed perpendicularly or almost perpendicularly to the flow direction for each link of the link chain, and by rotating this, the debris caught on the screen can be removed. There are structures that remove water outside the waterway.

[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 in, it exceeds the processing capacity of the installed dust removal equipment, and the dust cannot be processed completely, and the water passage part of the mesh frame or bar frame gradually becomes blocked. This made 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 device exceeds a certain value, the pressure of the flowing water applied to the mesh frame or bar frame will become excessive, causing structural damage to the device.

Out of necessity, measures such as restricting the amount of water taken into the factory were taken.

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 public emergency.

[Means for Solving the Problems] The present invention solves the above-mentioned problems, and when a large amount of dust such as water motherboard temporarily flows in (hereinafter referred to as an "emergency"), the present invention solves the above problems. In order to eliminate the abnormal water level difference, in the first invention, a screen frame (net frame or bar frame) equipped with a net or bar for collecting dust is joined to an endless link chain, and the link chain is A first dust removal device is provided which is driven via a pair of upper and lower sprocket wheels,
A bar frame for collecting dust is connected to an endless link chain driven via a pair of upper and lower sprocket wheels that can be driven separately from the first dust remover on at least one side of the first dust remover. A second dust removal device consisting of:
Of the bar frames of the second dust remover, excluding the bar frame that approximately corresponds to the height from the water bottom to the highest water level, the mesh or bar of the screen frame (4111 frame or bar frame) of the first dust remover The bar gap was made larger than the gap.

Further, in the second invention, the mesh of the first dust removing device is set to 6 mm to 10 mm, or the bar gap is set to 25 mm to 10 mm.
45 mm, and the bar frame approximately corresponds to the height from the bottom of the second dust removal device to the highest water level of 25 mm to 45 m.
m, and the other bar gaps were 50 to 100 mm.

[Function] The present invention includes a first dust removing device having a mesh or bar gap for collecting ordinary dust, and a second dust removing device that is provided in parallel with the first dust removing device and can be driven in rotation independently of the first dust removing device. The second dust removal device has the same bar gap (hereinafter referred to as A zone) as the first dust removal device at a certain height (from the water bottom to the highest water level), and the other bar gaps (hereinafter referred to as B zone).
is larger than that.

Therefore, during normal operation, the first. Both of the second dust removers are driven around to collect dust, but in case of an emergency, the bar rows of the A zone of the second dust remover are stopped in front and rear positions centered on the upper sprocket, and the water flow is stopped. so that it passes through the B zone. Zone B is a bar gap through which the water carrier can pass, so even if the water carrier is pushed by the water flow beyond the processing capacity of the first dust removal device, the second
Since it can pass through the B zone of the dust remover, the difference in water level between upstream and downstream of the dust remover before and after the dust remover does not become very large. Therefore, operations can continue safely without damage to equipment or restrictions on water intake due to large water level differences.

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

1 to 6 show examples of the dust removing device according to the present invention, FIG. 1 is a schematic plan view of the vicinity of the upper sprocket of the dust removing device, FIG. 2 is an enlarged front view of the main part, and FIG. Fig. 2 is an enlarged side sectional view of the main part as viewed from knee Ⅰ, Fig. 4 is an enlarged side sectional view of the main part as seen from I'1r-IV in Fig. 2, Fig. 5 is an overall schematic diagram of the first dust removal device, and Fig. 6 The figures show schematic overall side sectional views of the second dust removal device, with FIG. 6(a) showing the state during normal operation and FIG. 6(b) showing the state during emergency.

In Fig. 1, 1 is the rotation axis of the upper sprocket, 2,
Reference numeral 2 designates a bearing for the rotating shaft 1. 101° 101 is a pair of upper sprockets of the first dust removal device 100, which are fitted and fixed onto the rotating shaft 2.

The rotating shaft 1 is driven by a driving chain wheel 110 fixed to a portion of the shaft end protruding from the bearing 2. 1st
A second dust removing device 200 is installed on the side of the dust removing device 100, and a pair of left and right bearings 203.20 provided on the rotating shaft 1
Upper sprockets 201, 201 are attached to the left and right upper sprockets 201, similar to the first m removal device, to the post 220 disposed on the outside of the rotor 3. Further, the driving chain wheel 210 can be driven to rotate independently of the first dust removal device.

Both the first dust remover and the second dust remover have a pair of left and right upper subblocks) 101, 101 or 201,
A lower sprocket 102, 102 or 202, 202 (not shown) is provided corresponding to the sprocket 201, and the link chain 3 is mounted in an endless manner so that it can rotate.

The structure of the first dust removal device 100 will be explained with reference to FIGS. 2, 3, 4, and 5.

104 is a screen frame that is attached to the link chain 3 and has a packet part for storing captured garbage in the lower part; 5 is a power device that transmits power to the upper sprocket wheel 101 via a transmission chain 76 and a chain wheel 110; 9 is a trough 10 is a guide plate for guiding the dust, 11 is a housing of the dust removal device, 12 is a flow channel, and arrow F indicates the direction of the flowing water.The screen frame 4 is attached to each pitch of the link chain 3 as shown in the figure. , 14 is a screen body, which is made of a wire mesh or a large number of bars arranged in the shape of a spade, and is a member that prevents and scoops up dirt and debris in the flowing water.

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 pipe having a suitable diameter depending on the width of the waterway, and its center is located at the center of the roller 3b portion of the link chain 3. The screen main body 14 is integrally fixed via a mounting plate 16 that is positioned so as to be positioned and protrudes from the lower part of the mounting plate 16. Reference numeral 17 denotes a lower beam having a U-shaped cross section and provided at the lower end of the screen main body 14, and this lower beam 17 rotatably covers the upper part of the upper beam 15 of the screen frame 104 adjacent to the lower part of the lower beam 17. The screen main body 14 is integrally fixed via a mounting plate 18 that is provided and protrudes from the top of the mounting plate 18 . Reference numeral 19 denotes a side plate that holds the screen main 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. Each is fixed integrally. In other words, the side plate 19, the upper beam 15, and the lower beam 17 form a frame (screen frame 104) that holds the screen body 14. This frame body 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 packet protruding from the lower beam 17. The garbage packet 21 is provided so as to diagonally cover the front lower part of the screen body 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 the descending screen 1
A spray pipe provided on the back of the screen 3 is used to spray water onto the back of the screen body 14 as shown by the chain line to remove dust adhering to the screen body 14. Therefore, the garbage floating in the flow is first blocked by the screen body 14, and as the link chain 3 rises, the garbage packet 2
The garbage packet 21 scooped up by 1 and containing garbage further rises, becomes horizontal at the top of the upper sprocket 101, and then turns around and descends.

Then, the garbage existing in the garbage packet 21 falls due to its gravity, is guided by the outer surface of the garbage packet 21 of the lower screen and the guide plate 9, and is discharged into the waterway 10. On the other hand, the dust and the like adhering to the screen body xt are separated by the spray water and are discharged into the trough 10 via the outer surface of the dust packet 21 of the lower screen and the guide plate 9 as described above.

The endless link chain 3 to which the screen frame 104 constructed as described above is joined is usually driven by an upper sprocket wheel 101 with approximately 6 teeth as shown in FIG. shows.

On the other hand, the second dust removal device 200 is also configured in the same manner as the fourth dust removal device 100, but to explain only the difference, the screen main body 214 surrounded by the screen frame 204 has rows of bars parallel to each other in the vertical direction at equal intervals. This is the 6th
As shown in Figure (a), the bar gap is not the same throughout the entire length of the link chain, and the screen frame corresponding to the area of strip length A, which corresponds to the height from the water bottom to the highest water level, is used for water bodies, etc. to pass through. A relatively narrow bar gap 214 (e.g. 25 m
m ~ 45 mm), and the remaining B area is a wide bar gap 314 (for example, 50 mm ~ 100 m) that allows the water mother to pass through.
m).

Area A may be a mesh frame instead of a bar frame.

Therefore, the bar gap 2 of the second dust removal device shown in FIG.
20, two types of large and small items are connected.

As described above, the operation of the dust removal device of the present invention in which the first dust removal device and the second dust removal device are arranged in parallel in the width direction of the waterway is explained. When the water is flowing normally and is within the processing capacity of the dust removal device, that is, under normal conditions, the second dust removal device faces the narrow bar gap toward the waterway as shown in Fig. 6(a). Then, the first dust removal device is continuously rotated. In the first dust removal device, as shown in FIG. 5, dust is collected by individual screen frames 104 that are driven in the L direction shown in the figure, and only the flowing water from which the dust has been removed passes through the dust removal device. At this time, the amount of dust is relatively small and the screen body 14 smoothly removes the dust one after another, so there is little flow resistance of the flowing water, so the difference in water level between the front and rear of the dust removal device is relatively small, and the water level in front of the dust removal device is Since the level is not high, the passage resistance due to the accumulation of dust in the second dust removal device is not so large.

Note that since dust accumulates in the second dust remover, it may be rotated intermittently depending on the degree of accumulation to remove the collected dust in the same manner as the first dust remover.

However, in an emergency such as when a large amount of water matrix is generated, the amount of dust in the flowing water far exceeds the amount of dust in the first dust removal device, and the screen body 14 of the screen frame 104, which is continuously rising and rotating.
As a result, the passage of the flowing 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 case of an emergency, the second dust removal device is
As shown in Figure (b), the upper sprocket 201 is stopped at a position where the upper sprocket 201 is centered in the area A where the bar gap is narrow. By doing so, the area B facing the waterway becomes a wide bar gap 314, through which the water carrier can easily pass. Therefore, even if the water carrier or the like cannot pass through the first dust remover, the second dust remover acts as a safety valve, and the difference in water level between the upstream and downstream sides of the waterway does not become so large.

After the concentrated attack by the water carriers has passed, the original operating state will be restored.

As described above, in the present invention, the first
Dust is discharged by the dust removal device, and when a large amount of water mother is generated, the water mother is temporarily allowed to pass through the second dust removal device.
It is possible to prevent equipment damage and terminal water intake restrictions. The width ratio of the first dust remover and the second dust remover is appropriately determined depending on the environment in which the dust remover is installed, for example, the frequency of water mother generation, the amount of water mother inflow, etc.

[Effects of the Invention] In the present invention, a second dust removing device in which a narrow bar gap and a wide bar gap are connected is arranged side by side of a first dust removing device having a relatively fine mesh or a narrow bar gap. Therefore, even in the event of an emergency, in which the amount of dust in the running water temporarily increases, the second dust removal device can be bypassed and the water flowing through the water can be used to bypass the second dust removal device. You can keep it 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. In addition, even in an emergency, the minimum amount of water required can be secured, allowing continuous stable operation, increasing reliability in equipment use, and facilitating equipment maintenance and management.

Improves driving operability.

[Brief explanation of drawings]

1 to 6 show examples of the dust removing device according to the present invention, FIG. 1 is a schematic plan view of the vicinity of the upper sprocket of the dust removing device, FIG. 2 is an enlarged front view of the main part, and FIG. Fig. 2 is an enlarged side sectional view of the main part taken from m-■, Fig. 4 is an enlarged side sectional view of the main part taken from Fig. 2 IV-rV, Fig. 5 is an overall schematic diagram of the first dust removal device, and Fig. 6 6 shows a schematic overall side sectional view of the second dust removal device, FIG. 6(a) shows the state during normal operation, and FIG. 6(b) shows the state in an emergency. 1...Rotating shaft, 2...Bearing,
3... Link chain, 14... Screen body, 15... Upper beam, 17...
... Lower beam, Zoo... First dust remover, 101... Upper sprocket foil, 4... Screen frame (mesh frame or screen frame) O... Second dust remover, 1. ... Upper sprocket foil, 4... Bar frame, 214... Bar O... Bar gap, 314... Bar (wide).

Claims (2)

[Claims] (1) A first method in which a screen frame (net frame or bar frame) equipped with a net 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 dust removal device is provided, and on at least one side of the first dust removal device, an endless link chain driven through a pair of upper and lower sprocket wheels that can be driven separately from the first dust removal device is used for collecting dust. A second dust removal device consisting of continuous bar frames is installed in parallel, and of the bar frames of the second dust removal device, excluding the bar frame that corresponds to the height from the water bottom to the highest water level, the above-mentioned A dust removal device characterized in that the bar gap is larger than the mesh or bar gap of a screen frame (mesh frame or bar frame) of the first dust removal device. (2) The mesh of the screen frame of the first dust removing device according to claim 1 is 6 mm to 10 mm, or the bar gap is 25 mm.
~45 mm, and the bar frame approximately corresponds to the height from the bottom of the second dust removal device to the highest water level is 25 mm ~45 mm.
A dust removal device having a bar gap of 50 to 100 mm.