JP2655031B2 - Dust removal device - Google Patents

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 occurrence of an abnormal water level difference before and after the dust remover caused by a temporarily large amount of dust.

[0002]

2. Description of the Related Art Conventionally, in dust collectors generally used, they are widely used for water passages for industrial water or for cooling water in power plants and the like. A link chain is provided on both sides, and a bar screen or a screen made of wire mesh is erected perpendicularly or almost perpendicularly to the flow direction for each link of the link chain, and by rotating the screen, dust caught on the screen is removed. Some have a structure that is removed outside the waterway.

FIGS. 3 to 5 show one embodiment of a conventional dust removing apparatus, 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 the link chain 3 and captured at a lower portion. A screen frame having a bucket portion for storing dust, 5 is a power unit for transmitting power to the upper sprocket wheel 1 via a transmission chain 6 and a chain wheel 7, 8 is a shaft of the upper sprocket wheel 1, 9 is a dust for the trough 10. , A guide plate 11 for guiding the dust, a housing 12 for the dust remover, a running water channel 12 and an arrow F indicating the direction of the running water.

As shown in FIG. 4, the screen frame 4 is attached at every pitch of the link chain 3. Reference numeral 14 denotes a screen main body, which is formed of a number of rods arranged in a wire mesh or a plow shape. It is a member that blocks such things and scoops it up.

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

Reference numeral 19 denotes a side plate for holding the screen body 14 from its side. The side plate 19 has a width wider than the link width of the link chain 3 as shown in FIG. Each is integrally fixed to the end face. In other words, the side plate 19 and the upper beam 15 and the lower beam 17 form a frame (screen frame 4) for holding the screen main body 14. The frame is fixed to the link chain 3 by fixing the side plate 19 to the side surface of the link 3a with bolts 20. Reference numeral 21 denotes a dust bucket protruding from the lower beam 17. The dust bucket 21 is provided so as to diagonally cover the lower front of the screen main body 14, and its left and right ends are supported by side plates 19 via a support plate 22. And is integrally fixed to it. Reference numeral 23 denotes a spray pipe provided on the back of the descending screen 13 for discharging dust adhering to the screen main body 14 by spraying spray water on the back of the screen 13 as shown by a chain line. It is. Therefore, dust and the like floating in the flow are first blocked by the screen main body 14 and scooped up by the dust bucket 21 with the rise of the link chain 3, and the dust bucket 21 containing the dust further rises and the upper sprocket 1 Levels at the top of, then flips and descends.

The dust existing in the dust bucket 21 drops 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 the water passage 10.
Is discharged into On the other hand, dust and the like adhering to the screen main body 14 are separated by spray water and discharged to the trough 10 through 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 joined to the screen frame 4 constructed as described above is normally driven by the upper sprocket wheel 1 having approximately six teeth. In addition,
The L arrow indicates the link chain driving direction.

[0010]

In recent years, the width of a water channel has been widened with an increase in water intake, while the amount of dust floating in the water channel has tended to increase, and the amount of dust flowing into the water has rapidly increased. In particular, when a large amount of dust, such as a water carrier generated in summer, flows in a concentrated manner temporarily, the screen surface is almost completely covered, and the flowing water cannot be passed. The difference is over 1500mm, sometimes up to 2000mm in severe cases,
For this reason, a large force is applied to the screen frame and the link chain, which causes problems such as shortening the life of the link chain and causing a serious accident such as breakage of the link chain to stop the operation.

[0011]

In order to solve the above-mentioned problems, a dust removing apparatus according to the present invention is characterized in that an endless link chain is joined to a screen frame provided with a net screen for collecting dust, and the link is connected to the link frame. In a dust removing device that drives a chain via a pair of upper and lower sprocket wheels, an opening is provided in the screen frame, and the movable frame is provided with a mesh screen on the surface facing the opening and covering the opening on the rear side of the opening. The upper end is pin-joined to the screen frame, and the lower end of the movable frame is biased to the screen frame via a compression coil spring.

[0012]

In the dust removing apparatus of the present invention, when the water level difference between the front and the rear of the apparatus becomes larger than a certain level due to a rapid increase in dust, the movable frame covering the opening of the screen frame is compressed rearward and downstream around the pin fulcrum at the upper end. Rotation overcomes the urging force of the coil spring, and as a result of the rotation, flowing water flows downstream from the opened gap.
Therefore, the abnormal increase of the water level difference is prevented, and the movable frame comes into close contact with the opening again by the decrease of the inflow of refuse, and returns to the original state.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of a dust remover according to the present invention. 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. Openings 45, 46 are provided above and below the intermediate frame 44 provided at an intermediate height. A rectangular movable frame 50 having a size to cover the openings 45 and 46 is disposed on the back side (downstream of flowing water) of the openings 45 and 46. The movable frame 50 has a mesh screen 51 attached to a surface facing the openings 45 and 46, and an upper end is rotatably pin-joined to the upper frame 41 via a pin joint 52, and a lower end is housed in a protective tube 60. The fork end 54 is pin-connected to the fork end 54 passing through the compression coil spring 61 by a pin 53. The other end of the fork end 54 is inserted into the slide plate 62 to keep the compression coil spring 61 in a compressed state, and is screwed to the nut 55. You. Therefore, the movable frame 50 normally comes into close contact with the back side of the screen frame 40, and the flowing water passes through the mesh screen 51 via the openings 45 and 46. In the embodiment of the present invention, three movable frames 50 are arranged in the width direction of the screen frame 40, as shown in FIG. The number of screen frames provided with such a movable frame 50 may be the total number of one dust removing device (50 frames).
Equip about 10 frames out of 0 frames intermittently. In this case the other 40
The frame connects the conventional type shown in FIGS.

In the screen frame 40 having the movable frame 50 configured as described above, a large amount of dust temporarily flows during the operation, and the dust covers the entire surface of the mesh screen 51, causing a water flow obstacle. When the movable frame 50 is pressed to the downstream side, the movable frame 50 rotates around the pin joint 52 by overcoming the urging force of the compression coil spring 61, so that the passage of flowing water is ensured. Therefore, the operation is performed safely without the water level difference between the front and the back of the apparatus being extremely increased, so that the equipment is prevented from being damaged.

[0015]

As described above, in the dust removing apparatus of the present invention, even if a water impediment occurs due to a rapid increase in dust, the movable frame is automatically tilted backward so that the passage of flowing water is prevented. 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 the drawings]

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

FIG. 2 is a rear front view of a screen frame of the dust removing apparatus 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 longitudinal sectional view of a screen frame of a conventional dust removing device.

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

[Explanation of symbols]

 DESCRIPTION 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 52 Pin joint 53 Pin 54 Fork end 55 Nut Reference Signs List 60 Protection tube 61 Compression coil spring 62 Slide plate L Link chain moving direction F Flowing water flow direction

Claims (1)

(57) [Claims] 1. A dust removing device in which a screen frame provided with a net screen 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. And an upper end of a movable frame having the opening covered on the rear surface side of the opening and a mesh screen adhered to a surface facing the opening, which is pin-joined to the screen frame. A dust removing device having a lower end biased to the screen frame via a compression coil spring.