JPH0489911A - Dust collector - Google Patents

Abstract

PURPOSE:To continue smooth operation as well as to check the by-pass flowing between screen frames by protruding a plate shaped extending plate from the lowest bottom end of a screen frame to abut against an elastic member pasted on the upper portion of a screen frame in the second position. CONSTITUTION:A dust collector, which drives an endless link chain 3 through a pair of upper and lower sprocket wheels 1, 2, is formed by connecting a screen frame 4, having a dust collecting screen 14, to the link chain 3 aslant. The plate shaped extending plate 100, which longitudinal length is the length of the width of the screen frame 4, is protruded from the lowest bottom end of the screen frame 4 and abuts against an elastic member 110 pasted on the outside of an upper beam 15 of the screen frame 4 in the second position. While making a straight advance, the by-pass flowing water between the screen frames 4 is shut off by the extending plate 100. At the time when the upper and lower sprockets 1, 2 portions make a reverse turn, the elastic portion 110 only deforms but the structure material of the screen frame 4 is refrained from making contact with each other.

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 in particular to an improvement in the structure for preventing or reducing unremoved water flowing before and after the dust removal device. Regarding.

[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 bath screen or wire mesh is erected perpendicularly or almost perpendicularly to the flow direction for each link of the link chain,
There is a structure in which the dust caught on the screen is removed from the waterway by rotating the screen.

4 to 6 show one embodiment of a conventional dust removal device, with FIG. 4 being an overall schematic diagram, and FIG. FIG. 6 is a detailed vertical cross-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, and 3 is both sprocket foils 1.
2 is a link chain mounted in an endless manner; 4 is a screen frame which is attached diagonally to the link chain 3 and has a bucket portion 21 at the bottom for storing captured garbage; A power device that transmits power to the upper sprocket wheel 1; 8 is the shaft of the upper sprocket wheel 1; 9 is a guide plate that guides the dust to the trough 10; 11 is the housing of the dust removal device; 12 is the flow channel; Show direction. As shown in Fig. 6, the screen frame 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 designed to collect dust and other substances in flowing water. This is a member that prevents this and also scoops it up. Reference numeral 15 denotes an upper beam provided at the upper end of the screen body 14. This upper beam 15 is made of a flat plate with a wide tip bent according to 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 to the lower part thereof via a mounting plate 16. A lower beam 17 is provided at the lower end of the screen main body 14 and is made of a flat plate with a bent tip. It is provided so as to be freely covered, and the screen main body 14 is integrally fixed to the upper part of the screen via a 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.
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 a frame (screen frame 4) 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 bolts 20.

Reference numeral 21 denotes a garbage bucket section composed of the lower beam 17 and the side plate 19. In addition, 23 is a spray pipe installed at the back of the screen 13 that is descending, and is used to remove dust adhering to the screen body 14 by spraying water onto the back of the screen body 14 as shown by the chain line. It is something. Therefore, the garbage floating in the flow is first blocked by the screen body 14, and as the link chain 3 rises, it is scooped up by the garbage packet 21. The garbage packet 21 containing the garbage further rises, and the upper sprocket 1 It becomes horizontal at the top, then turns around and descends.

Then, the garbage existing in the garbage bucket portion 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 adhering to the screen body 14 is separated by the spray water and is discharged into the trough 10 via the outer surface of the dust bucket part 21 of the lower screen and the guide plate 9 as described above.

As shown in FIG.
It was driven by the top sprocket wheel l of the teeth.

Note that the L arrow indicates the link chain driving direction.

[Problems to be Solved by the Invention] In the dust removal device in which the screen frame configured as described above is diagonally joined and connected to the link chain, when the adjacent screen frame is reversed by the upper sprocket or the lower sprocket, , The lower and upper ends of both screen frames are likely to come into contact and interfere with each other ((This is due to the fact that the rotational movement of the sprocket and link chain is not a perfect circular movement but a 6-tooth polygonal movement), overload In most cases, it is not possible to bring the two screen frames close enough to touch each other, as there is a risk of damage to the equipment.

As shown in (b), it was necessary to maintain a safety clearance of approximately 5 to 10 mm. For this reason, the debris in the flowing water passing through this gap cannot be captured, and the debris may become clogged during this time, interfering with the smooth movement of the equipment. For this reason, an effective measure to prevent the bypass of flowing water between screen frames has been desired.

[Means for Solving the Problems] In order to solve the above problems and prevent unremoved bypass water as much as possible, the present invention provides a screen frame in which an endless link chain is provided with a screen for collecting dust. In a dust removal device in which the link chain is driven through a pair of upper and lower sprocket wheels, the longitudinal direction is from the lowest end of the screen frame to the next screen frame connected to the screen frame. A plate-shaped overhang having the length of the screen frame width is provided protrudingly, an elastic member is attached to the outer surface of the upper beam of the next screen frame, and the tip of the overhang plate is in contact with the elastic member. The overhanging plates were arranged so as to be in contact with each other.

[Function] In the dust removal device of the present invention, a plate-shaped elastic member having a screen width that projects from the lowest end of the screen frame toward the next adjacent screen frame is provided, and its tip is connected to the next screen. Since it is configured so that it comes into contact with the elastic member attached to the upper frame beam, the bypass water is shut off during straight-ahead operation, and when the upper and lower sprockets are reversed,
By simply deforming this elastic member by being pressed by the tip of the overhanging plate, contact with the structural members (metal parts) of the screen frame can be avoided, so that smooth operation can be continued.

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

1 to 3 show an embodiment of the dust removal device according to the present invention, FIG. 1 is a longitudinal cross-sectional view showing the connected state of the screen frame, FIG. 2 is a front view of the screen frame, and FIG. 3 is a main view of the screen frame. FIG.

The sprocket wheels in FIGS. 1 to 3 each have a sprocket wheel with a number of teeth of 6 to 12, and the link chain 3 has two types of link chains 3x and 3y alternately arranged and connected. The link plates on both sides of the link chain 3x are conventionally commercially available and have the same shape on the left and right, whereas the link plates 3y (outside) and 3yi (inside) of the link chain 3y.
The link plates 3 y x are not of the same shape, and as shown in FIG. 1, the link plates 3 y x are wider and longer vertically than the outer link plates 3 y 1, and are formed into circular arcs at the upper and lower ends. And vertically adjacent link plates 3
The gap y2 is connected via the link chain 3X while maintaining a gap of about 5 to 10 mm.

As shown in Figures 1 and 2, the link chain 3y
A plurality of bolt holes (five in this embodiment) are drilled in the direction t, and a required screen frame or bar frame is fixed with bolts and nuts 20.

First, FIG. 1, in which the dust collecting means is a screen frame, will be explained in detail. The screen frame 4 is the upper beam 15
The screen body (mesh) 14 is connected to the lower beam 17 and the side plates 19, 19 on both the left and right sides, and the screen body (mesh) 14 is clamped by the upper beam 15 and the lower beam 17, respectively, by the mounting plate 16 and the mounting plate 18. and attached with bolt nuts 16a and 18a (as shown in FIGS. 1 and 3).

Further, the end portions of the side plates 19 may be bent into an L-shape to protrude at both ends, and the screen main body may be attached. The screen frame constructed as described above is fastened to link chains 3 y x having mounting holes on both left and right sides with bolts and nuts 20 via side plates 19 . The maximum length of the screen frame in the vertical direction is approximately twice the link chain pitch, and as shown in Figure 1, the gap between adjacent screen frames in the vertical direction is approximately 1.
The size of the screen frame is determined to be approximately 0 mm to 30 mm. Furthermore, a projecting plate 100 having approximately the same width as the screen frame is provided from the bottom end of the screen frame 4 toward the top end of the next screen frame, while an upper beam 15 of the next screen frame Thickness 10~ on the outer surface of
An elastic member 110 with a large deformability of about 20 mm is also attached with bolts and nuts via a presser plate 120 within the length range of the screen frame width. The most suitable elastic member is a foamed material that is easily deformed, such as sponge rubber, but a soft rubber plate may also be used. Then, during assembly, the overhang plate 10
The tip of the elastic member 110 is arranged so that it lightly contacts the elastic member 110. Both the upper beam 15 and the lower beam 17 can be used by pressing lightweight section steel, but the diagonal overhang on the side facing the flowing water of the lower beam 17 is particularly useful as a storage place for collected garbage. Since the bucket portion 21 is formed as shown in FIG. 1, the lower beam 17 is made long to some extent as shown in FIG.

In addition, in order to increase the dust removal ability, as shown in Figure 3,
The screen main bodies 50 and 60 can also be provided by providing openings in the upper beam 15 and the lower beam 17. (however,
It is not shown in FIG. 1. ) In this embodiment, the overhang plate 100 was created by bending the tip of the lower beam downward, but it may be fixed to the tip of the lower beam as a separate member.

The operation of the dust removal device of the present invention configured as above will be explained.

When the dust removal device of the present invention is installed at a water intake that takes in seawater or river water in the state shown in FIG.
, 50, 60 and is prevented from drifting, and when the screen frame 4 rises from the water, the garbage is stored in the bucket portion 21 of the lower beam 17 by its own gravity. Thereafter, the upper sprocket 1 is engaged and rotated, and the dust accumulated in the bucket part 21 of the lower beam of the screen frame 4 which is turned upside down slides on the guide plate 9 and is discharged to a predetermined trough 10 and collected.

In this way, in the embodiment of the present invention, the dust removal from the water flowing through the waterway is carried out using the screen main body 14 of the screen frame 4 as the main force and with the screen main bodies 50 and 60 as an aid. , it is possible to prevent bypass water from passing through the gap between the two screen frames. In addition, in the dust removal device according to the embodiment of the present invention, the link plate 3y inside the link chain 3y is made wide, and the length is extended vertically to make the tip arc-shaped, and the length is 5 to 10 mm. Since the link plates 3yi are continuous with a gap maintained, the passage of water to both ends of the screen frame 4 can also be kept to a minimum. In addition, the front and rear connecting parts are not a combination of concave and convex parts like conventional water shielding plates, but instead are link plates with arc-shaped upper and lower ends, so they interfere with each other when rotating the upper and lower sprockets. Smooth rotational movement is maintained without causing any friction.

[Effects of the Invention] In the present invention, a plate-shaped projecting plate having the width of the screen frame is provided protruding from the bottom end of the screen frame toward the next screen frame connected to this screen frame. Since it is configured to abut against the elastic member attached to the upper beam of the screen frame, it is possible to prevent bypass water from flowing through the gap between the two adjacent screen frames. Therefore, it is possible to almost eliminate running water that does not pass through the dust removal device but passes above and below the water channel. Therefore, in addition to ensuring high-quality, clear water intake, the endless movement of the screen frame is performed smoothly, which improves maintainability and reduces the vibration and noise of the dust removal equipment, extending the life of the equipment and improving the working environment. be done.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the dust removal device of the present invention, Figure 1 is a longitudinal sectional view showing the connected state of the screen frame, Figure 2 is a front view of the screen frame, and Figure 3 is the main part. It is an enlarged longitudinal cross-sectional view. 4 to 6 show conventional embodiments, FIG. 4 is an overall schematic diagram, FIG. 5 is a diagram of the meshing state of the sprocket and link chain, FIG. 6 shows details of the screen frame, and FIG. 6(a) is a side sectional view, and FIG. 6(b) is a front view. 1... Upper sprocket foil, 2...
・Lower sprocket wheel, 3.3x, 3y...Link chain, 3y +...Link plate (outside), 3y,...
・Link plate (inside), 3a...link chain,
3b...Roller, 4...Screen frame (or bar frame), 5...Power unit,
6...Transmission chino, 7...Chain wheel, 8...Upper sprocket wheel shaft, 9...
... Guide plate, 10 ... Trough, 14
...Screen body, 15...Top beam, 16...
Mounting plate, 17...Lower beam, 18...
...Mounting plate, 19...Side plate,
2o... Bolt nut, 21... Bucket part, 50... Screen body, 60... Screen body, 100... Overhang plate, 120...・Press plate. 110...Elastic member,

Claims (1)

[Claims] (1) In a dust removal device in which a screen frame equipped with a screen for dust collection is diagonally joined to an endless link chain, and the link chain is driven via a pair of upper and lower sprocket wheels, the lowermost end of the screen frame A plate-shaped projecting plate whose longitudinal direction is the width of the screen frame is provided protrudingly toward the next screen frame connected to the screen frame, and on the outer surface of the upper beam of the next screen frame. A dust removal device characterized in that an elastic member is attached, and the overhang plate is arranged such that the tip of the overhang plate comes into contact with the elastic member.