JPH0693611A - Dust collector - Google Patents

Abstract

PURPOSE:To provide a dust collector which prevents a screen from being clogged against water flow even when much foreign materials like jellyfishes increase rapidly and prevents the body from being damaged to continuously and stably operate. CONSTITUTION:Openings 45, 46 are provided in the screen frame 40 and the upper and lower ends of a movable frame 50 attached with a net screen 51 covering the opening at the rear side of the openings 45, 46 are jointed with a pin joint 53 and pressed to the screen frame 40 through a compressive coil spring 61.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover for removing dust from seawater or river water, and more particularly to a dust remover for preventing an abnormal water level difference before and after the dust remover caused by a large amount of dust that temporarily flows in.

[0002]

2. Description of the Related Art Conventionally, generally used dust removers have been widely used in industrial water canals or water canals for collecting cooling water in power plants. A link chain is provided on both sides, and a bar screen or a wire mesh screen is erected vertically or almost perpendicularly to the flow direction for each link of this link chain, and the dust caught on the screen is rotated by rotating it. There is a structure to remove it outside the waterway.

3 to 5 show one embodiment of a conventional dust removing device, FIG. 3 is an overall schematic view, and FIGS. 4 and 5 are a detailed vertical sectional view and a front view of a screen frame having a bucket portion.

In FIG. 3, 1 is an upper sprocket wheel, 2 is a lower sprocket wheel, 3 is a link chain mounted endlessly on both sprocket wheels 1 and 2, and 4 is attached to a link chain 3 and captured by the lower part. A screen frame having a bucket portion for storing dust, a power unit 5 for transmitting power to the upper sprocket wheel 1 via a transmission chain 6 and a chain wheel 7, 8 a shaft of the upper sprocket wheel 1, and 9 a trough 10 for dust. Is a guide plate for guiding the housing, 11 is a housing of the dust removing device, 12 is a flowing water channel, and F arrow is a direction of flowing water.

As shown in FIG. 4, the screen frame 4 is attached at every pitch of the link chain 3, and 14 is a screen body, which is composed of a wire mesh or a plurality of bar members arranged in a plow shape, and is a dust in running water. It is a member that prevents the above and scoops up this.

Reference numeral 15 is an upper beam provided at the upper end of the screen body 14, and the upper beam 15 is a pipe having a diameter suitable for the width of the water channel, and the center of which is the roller 3b portion of the link chain 3. The screen main body 14 is integrally fixed via a mounting plate 16 provided so as to be located at the center of the screen and projecting from the lower part thereof.
Reference numeral 17 denotes a lower beam having a U-shaped cross section provided at the lower end of the screen body 14, and the lower beam 17 rotatably covers the upper portion of the upper beam 15 of the screen frame 4 adjacent to the lower portion thereof. The screen main body 14 is integrally fixed via a mounting plate 18 provided on the upper part of the screen.

Reference numeral 19 denotes a side plate for holding the screen body 14 from its side portion. The side plate 19 has a width wider than the link width of the link chain 3 as shown in FIG. It is fixed integrally to each end face. In other words, the side plate 19, the upper beam 15 and the lower beam 17 form a frame body (screen frame 4) for holding the screen body 14. The frame body is fixed to the link chain 3 by fixing the side plate 19 to the side surface of the link 3a with the bolt 20. Reference numeral 21 denotes a dust bucket projecting from the lower beam 17. The dust bucket 21 is provided so as to obliquely cover the lower front part of the screen body 14, and the left and right ends of the dust bucket 21 are provided with side plates 19 via a support plate 22. Is integrally fixed to. Reference numeral 23 is a spray pipe provided on the back of the descending screen 13 for ejecting spray water to the back surface of the screen 13 as shown by a chain line so as to remove dust attached to the screen body 14. Is. Therefore, dust and the like floating in the flow are first blocked by the screen body 14, and are scooped up by the dust bucket 21 as the link chain 3 rises, and the dust bucket 21 containing the dust further rises, and the upper sprocket 1 It becomes horizontal at the top of, then flips and descends.

Then, the dust existing in the dust bucket 21 falls due to its gravity and is guided by the outer surface of the dust bucket 21 of the lower screen and the guide plate 9 to form the water channel 10.
Is discharged inside. On the other hand, dust and the like adhering to the screen body 14 is separated by the spray water and discharged to 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 screen frame 4 constructed as described above is joined is usually driven by the upper sprocket wheel 1 having about 6 teeth. In addition,
The L arrow indicates the link chain driving direction.

[0010]

In recent years, along with the increase in the amount of water intake, the width of the water channel has become wider, while the dust particles floating in the water channel tend to increase, and the inflow dust particles also frequently increase rapidly. In particular, when a large amount of dust, such as mica, is temporarily concentrated and flows in during the summer, the screen surface is almost completely covered so that the running water cannot pass through. The difference is over 1500 mm, and in extreme cases it can reach 2000 mm,
For this reason, a large amount of force is applied to the screen frame and the link chain, which shortens the life of the link chain and causes a serious accident such as damage to the link chain, resulting in the suspension of operation.

[0011]

In order to solve the above-mentioned problems, in the dust removing device of the present invention, an endless link chain is joined to a screen frame provided with a net-type screen for collecting dust, and the link is provided. In a dust remover in which a chain is driven through a pair of upper and lower sprockets, an opening is provided in the screen frame, a rear surface of the opening is covered with the opening, and a mesh screen is attached to a surface opposite to the opening. The movable frame is arranged, and the upper and lower ends of the movable frame are pressed against the screen frame by interposing compression coil springs, respectively.

[0012]

In the dust removing apparatus of the present invention, when the water level difference before and after the apparatus becomes a certain amount or more due to a sharp increase in dust, the movable frame is pressed downstream by the pressure of the flowing water, and the movable frame is pressed against the screen frame. The compression coil spring is compressed and contracts by overcoming the biasing force of the pair of compression coil springs at the upper and lower ends, resulting in a gap between the screen frame and the movable frame.
Therefore, the inflow passes through this gap and flows out to the downstream side from the four sides around the movable frame. In this way, an abnormal increase in the water level difference is prevented, and due to the decrease in the inflow of dust, the movable frame comes into close contact with the opening surface of the screen frame again and returns to its original state.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 show an embodiment of a dust removing device according to the present invention, and FIG. 1 is a longitudinal sectional view of a main part of a screen frame,
FIG. 2 is a rear front view of the screen frame. In the figure,
The screen frame 40 is formed by an upper frame 41, a lower frame 42, and a pair of left and right side plates 43, 43, and openings 45, 46 are provided vertically with a middle frame 44 provided at an intermediate height interposed therebetween. A rectangular movable frame 50 having a size that covers the openings 45 and 46 is provided on the back side of the openings 45 and 46 (downstream side of the flowing water). The movable frame 50 has a mesh screen 51 attached to the surface facing the openings 45 and 46, and one end of a fork end 54 is pin-joined to the upper end and the lower end by a pin joint 53, and the other end of the fork end 54 is A protective coil 60 fixed to the upper frame 41 or the lower frame 42 is passed through a compression coil spring 61 elastically mounted inside, and a slide plate 62 is sandwiched and screwed with a nut 55. Therefore, the movable frame 50 is usually in close contact with the back side of the screen frame 40, and the flowing water passes through the openings 45 and 46 and passes through the mesh screen 51. In the embodiment of the present invention,
As shown in FIG. 2, three movable frames 50 are arranged in the width direction of the screen frame 40. The screen frame equipped with such a movable frame 50 may be the total number (50 frames) of one dust removing device, but normally about 10 frames out of the total number of 50 frames are intermittently equipped. In this case, the other 40 frames are connected to those of the conventional type shown in FIGS.

In the screen frame 40 having the movable frame 50 constructed as described above, a large amount of dust flows in temporarily during operation, and the dust covers the entire surface of the net-type screen 51 to cause water flow failure. When this happens, the movable frame 50 is pressed to the downstream side, overcomes the urging force of the compression coil spring 61, and the movable frame 50 separates from the screen frame 40 to create a gap, so that passage of running water is secured. Therefore, the water level difference before and after the equipment does not increase extremely and the equipment is operated safely, which prevents damage to the equipment.

[0015]

As described above, in the dust removing apparatus of the present invention, even if a water flow failure occurs due to a sudden increase in dust, the movable frame automatically moves to the rear side to allow running water to pass therethrough. As a result, the increase in water level difference is suppressed, damage to equipment is prevented, and continuous stable operation is ensured.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a screen frame of a dust remover according to an embodiment of the present invention.

FIG. 2 is a rear front view of the screen frame of the dust removing device according to the embodiment of the present invention.

FIG. 3 is an overall vertical sectional view of a conventional dust removing device.

FIG. 4 is a vertical cross-sectional view of a screen frame of a conventional dust removing device.

FIG. 5 is a front view of a screen frame of a conventional dust removing device.

[Explanation of symbols]

 1 Upper sprocket wheel 2 Lower sprocket wheel 3 Link chain 3a Link chain 3b Roller 4 Screen frame 5 Power unit 6 Transmission chain 7 Chain wheel 8 Upper sprocket wheel shaft 9 Guide plate 10 Trough 14 Screen body 15 Upper beam 16 Mounting plate 16a Bolt Nut 17 Lower beam 18 Mounting plate 19 Side plate 20 Bolt nut 21 Dust bucket 40 Screen frame 41 Upper frame 42 Lower frame 43 Side plate 44 Intermediate frame 45 Opening 46 Opening 50 Movable frame 51 Mesh screen 53 Pin joint 54 Fork end 55 Nut 60 Protection Pipe 61 Compression coil spring 62 Slide plate L Direction of movement of link chain F Flow direction of flowing water

Claims (1)

[Claims] 1. A dust remover in which a screen frame provided with a net-type screen for collecting dust is joined to an endless link chain, and the link chain is driven through a pair of upper and lower sprocket wheels. A movable frame is provided on the rear side of the opening, and a mesh screen is attached to the surface opposite to the opening, and a movable frame is provided on each of the upper and lower ends of the movable frame. A dust remover that is pressed against the screen frame via the