JPH0762337B2 - Dust remover - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dust remover for removing dust from seawater or river water, and particularly to an improvement in a structure for preventing or reducing undusted running water before and after the dust remover. Regarding

[Prior Art] Conventionally, generally used dust removers have been widely used in industrial water canals or water canals for collecting cooling water in power plants, and the most well-known are A link chain is provided on both sides, and a bar screen or a screen made of wire mesh 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.

4 to 6 show one embodiment of a conventional dust remover, FIG. 4 is an overall schematic view, and FIG. 5 is a meshing state diagram showing a meshing state of a sprocket for driving the dust remover and a link chain. FIG. 6 is a detailed vertical sectional view (a) and a front view (b) of a screen frame having a bucket portion.

In FIG. 4, 1 is an upper sprocket wheel, 2 is a lower sprocket wheel, 3 is both sprocket wheels 1, 2
An endlessly mounted link chain 4, a screen frame 4 having a bucket portion 21 obliquely attached to the link chain 3 and storing trapped dust in the lower portion, 5 a transmission chain 6
And a power unit for transmitting power to the upper sprocket wheel 1 via the chain wheel 7, 8 is a shaft of the upper sprocket wheel 1,
Reference numeral 9 is a guide plate for guiding dust to the trough 10, 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. 6, 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-shaped rods arranged in the shape of a plow, and which collects dust and the like in running water. It is a member that both blocks 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 made of a flat plate having a wide tip bent according to the width of the water channel, and its center is the center of the roller 3b portion of the link chain 3. The screen main body 14 is integrally fixed to the lower part of the screen main body 14 via a mounting plate 16. Reference numeral 17 denotes a lower beam which is provided at the lower end of the screen body 14 and which is made of a flat plate whose tip is bent. The lower beam 17 is rotatable above the upper beam 15 of the next screen frame 4 adjacent to the lower part thereof. The screen body 14 is integrally fixed to the upper part of the screen body 14 via a mounting plate 18. 19
Is a side plate that holds the screen body 14 from its side portion. The side plate 19 has a width wider than the width of the link of the link chain 3 as shown in FIG. The left and right end faces are integrally fixed. 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 portion composed of the lower beam 17 and the side plate 19. In addition, 23 is a spray pipe provided on the back of the descending screen 13, for spraying spray water to the back surface of the screen body 14 as shown by the chain line so as to remove the 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's It becomes horizontal at the top, then reverses and descends.

Then, the dust existing in the dust bucket 21 is dropped due to its gravity, guided by the outer surface of the dust bucket 21 of the lower screen and the guide plate 9, and discharged into the water channel 10. 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 guide plate 9 and the outer surface of the bucket portion 21 of dust on the lower screen as described above.

The endless link chain 3 to which the screen frame 4 constructed as described above is joined is usually about 6 as shown in FIG.
It was driven by the upper sprocket wheel 1 of the tooth.
The L arrow indicates the link chain driving direction.

[Problems to be Solved by the Invention] In the dust removing device in which the screen frames configured as described above are obliquely joined to the link chain and connected, when the adjacent screen frames are inverted by the upper sprocket or the lower sprocket. , The lower and upper ends of both screen frames come into contact with each other and easily interfere with each other (due to the fact that the rotating motion of the sprocket and the link chain is a polygonal motion of 6 teeth, not a complete circular motion), and overload or Since there is a risk of equipment damage, it cannot be brought close enough to contact both screen frames, and it is necessary to maintain a safety clearance of about 5 to 10 mm as shown in Fig. 6 (a) and (b). was there. For this reason, the dust in the running water passing through this period cannot be captured, and the dust may be blocked during this period to hinder the smooth movement of the device. For this reason, effective measures to prevent bypass of running water between screen frames have been desired.

[Means for Solving the Problems] In order to solve the above problems and prevent bypass running water that has not been removed as much as possible, in the present invention, an endless link chain is provided with a screen frame provided with a dust collecting screen. In a dust removing device that is obliquely joined and that drives the link chain through a pair of upper and lower sprocket wheels, a longitudinal direction that protrudes from the lowermost end of the screen frame toward the next screen frame connected to the screen frame. Is provided with a plate-shaped elastic member having a length equal to the width of the screen frame, and the tip of the elastic member is arranged so as to contact the upper part of the next screen frame.

[Operation] In the dust remover of the present invention, a plate-like elastic member having a screen width protruding from the lowermost end of the screen frame toward the next adjacent screen frame is provided, and the tip of the plate-like elastic member is provided at the next screen. Since it is configured to contact the upper part of the frame,
Bypassing running water is shut off during straight running, and when the upper and lower sprockets are turned over, this elastic member simply bends or separates, and the structural member of the screen frame (metal part)
Since the contact with is avoided, smooth operation is continued.

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

1 to 3 show an embodiment of the dust removing device according to the present invention, and FIG. 1 is a longitudinal sectional view showing a connected state of a screen frame,
FIG. 2 is a front view of the screen frame, and FIG. 3 is an enlarged vertical sectional view of an essential part showing another embodiment.

In FIGS. 1 to 3, the sprocket wheels each have 6 to 12 teeth, and the link chain 3 has two types of link chain 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 ₁ (outer side) and 3y ₂ (inner side) of the link chain 3y are not the same shape and the ring plate 3y _As shown in FIG. 1, ₂ is wider than the outer link plate 3y ₁ and is longer in the vertical direction, and is formed in an arc at the upper and lower ends. The ring plates 3y ₂ adjacent to each other in the vertical direction are connected via a link chain 3x while maintaining a gap of about 5 to 10 mm. As shown in FIGS. 1 and ₂ , a plurality of bolt holes (five in this embodiment) are drilled in the link chain 3y ₂ so that a required screen frame or bar frame can be secured by a bolt nut 20. To solidify.

First, FIG. 1 in which the dust collecting means is a screen frame will be described in detail. The screen frame 4 is configured by connecting four members of an upper beam 15, a lower beam 17, and side plates 19 and 19 on both left and right ends, and a screen body (mesh) 14 is attached to the upper beam 15 and the lower beam 17 by mounting plates 16 respectively. Is clamped by the mounting plate 18 and the bolt nuts 16a and 18a and attached (first
(As shown in the figure). Also, the screen body may be attached to both side ends by bending the end portions of the side plates 19 into an L shape and projecting them. The screen frame configured as described above is fastened to the link chain 3y ₂ having mounting holes on both left and right sides with the bolts and nuts 20 via the side plates 19. The maximum vertical length of the screen frame is approximately twice the link chain pitch.
As shown in the figure, the size of the screen frame is determined so that the space between the screen frames adjacent to each other in the vertical direction is about 10 mm to 30 mm. From the lowermost end of the screen frame 4, a projecting plate 100 having a width substantially the same as that of the screen frame is provided so as to project toward the uppermost end of the next screen frame. The member 110 is clamped by the holding plate 120 and fastened with bolts and nuts. The bolt penetration hole of the elastic member 110 is an elongated hole. Then, at the time of assembly, the elastic member 110 is fixed so that the tip of the elastic member 110 contacts the next screen frame. Elastic member 110
May contact the side surface of the tip of the upper beam 15 of the next screen frame as shown in FIG. 1 or may contact the tip of the surface of the upper beam 15 as shown in FIG. May be. It is desirable that the elastic member 110 is made of an ordinary rubber plate or synthetic resin having flexibility, and the thickness is selected to be 3 to 10 mm. Both the upper beam 15 and the lower beam 17 can be used by pressing light-weight shaped steel, but the diagonal bulge on the side of the lower beam 17 facing the running water is used as a storage place for the collected dust. Since the bucket portion 21 is formed,
As shown in the figure, the lower beam 17 is lengthened to some extent.

In addition, in order to enhance the dust removal capability, the upper beam 15 and the lower beam 17 may be provided with openings to provide the screen bodies 50 and 60.

The operation of the dust removing device of the present invention configured as above will be described.

When the dust remover of the present invention is installed at the intake for taking in seawater or river water in the state shown in FIG. 4 and the link chain is driven by the power unit, dust particles in the running water are removed from the screen body 14,5.
When the screen frame 4 comes into contact with 0, 60 and is prevented from drifting, and the screen frame 4 floats above the water, it is stored in the bucket portion 21 of the lower beam 17 by the gravity of the dust itself. Then the upper sprocket 1
The dust accumulated in the bucket portion 21 of the lower beam of the screen frame 4 which has been engaged and rotated by turning upside down is slid on the guide plate 9 and discharged to a predetermined trough 10 to be collected.

In this way, in the embodiment of the present invention, the main body of the screen body 14 of the screen frame 4 is the main force for dust removal of the flowing water flowing through the water channel.
It is carried out with the screen body 50, 60 as an aid, but since an elastic member is arranged between the upper and lower adjacent screen frames,
Bypass water flowing through the gap between the screen frames can be blocked. In addition, in the dust removing device which is the embodiment of the present invention, the link plate 3y ₂ inside the link chain 3y
Is wide, the length is extended vertically and the tip is arcuate, and the gap of 5 to 10 mm is maintained, and the link plate 3y
_{Since the two} are continuous, it is possible to minimize the passage of running water on both ends of the screen frame 4. Also, because the front and rear connecting parts are not a combination of unevenness like the conventional water shield plate, but both are arc-shaped upper and lower ring plates, they interfere with each other when rotating the upper and lower sprockets. The smooth pivoting motion is maintained without causing.

[Effect of the Invention] In the present invention, a plate-like elastic member having a screen frame width is projected from the lowermost end of the screen frame toward the next screen frame connected to this screen frame, Since it is configured to abut the upper portion of the screen frame, it is possible to prevent the bypass running water flowing through the gap between the adjacent screen frames. Therefore, it is possible to almost eliminate running water that passes through the upper and lower parts of the water channel without passing through the dust removing device. Therefore, in addition to ensuring high-quality and clear water intake, the endless endless movement of the screen frame is also performed smoothly, which has excellent maintainability, reduces vibration and noise of the dust remover, and extends the life of the equipment and improves the working environment. To be done.

[Brief description of drawings]

1 to 3 show an embodiment of the dust removing device of the present invention, FIG. 1 is a longitudinal sectional view showing a connected state of the screen frame, FIG. 2 is a front view of the screen frame, and FIG. It is a principal part expanded longitudinal cross-sectional view which shows an Example. 4 to 6 show a conventional embodiment, FIG. 4 is an overall schematic diagram, FIG. 5 is a meshing state diagram of a sprocket and a link chain, FIG. 6 shows details of a screen frame, and FIG. FIG. 6A is a side sectional view, and FIG. 6B is a front view. 1 …… Upper sprocket wheel, 2 …… Lower sprocket wheel, 3,3x, 3y …… Link chain, 3y ₁ …… Link plate (outside), 3y ₂ …… Link plate (inside), 3a …… Link chain, 3b ... Roller, 4 ... Screen frame (or bar 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, 17 …… Lower beam, 18 …… Mounting plate, 19 …… Side plate, 20 …… Bolt nut, 21 …… Bucket part , 50 …… screen body, 60 …… screen body, 100 …… overhanging plate, 110 …… elastic member, 120 …… presser plate.

Claims (1)

[Claims] 1. A dust remover in which a screen frame having a dust collecting screen is obliquely joined to an endless link chain, and the link chain is driven through a pair of upper and lower sprocket wheels. A plate-like elastic member having a length in the longitudinal direction which is the width of the screen frame and projecting from the lower end toward the next screen frame connected to the screen frame is provided, and the tip of the elastic member is the next screen. A dust removing device, which is arranged so as to come into contact with the upper part of the frame.