JPH04368506A - Dust removing device - Google Patents

Abstract

PURPOSE:To remove dust surely and automatically which is stuck on a screen surface after dust collection. CONSTITUTION:A washing water pumping-up member 26 is fitted to a screen frame 14, and collected dust is discharged after dust collection. Washing water is flowed on a screen surface to wash it, and then the screen frame 14 is immerged in a washing tank 60 to be inversely rotated and washed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removal device for removing dust from seawater or river water, and more particularly to a dust removal device equipped with a cleaning tank that reliably removes dust adhering to a screen surface after collecting the dust.

0002

2. Description of the Related Art Conventionally, dust removal devices have generally been widely used in industrial water canals and waterways for taking in cooling water from power plants and the like. The most well-known type of dust removal device has a link chain on both sides of the waterway, and each link of the link chain has a bar screen or a screen made of wire mesh installed perpendicular to the water flow direction or at a predetermined angle of inclination. The structure is such that the screen is erected with a holder and the screen is rotated to remove dust adhering to the screen from the waterway.

FIGS. 5 to 7 show examples of conventional dust removal equipment.
In particular, FIG. 5 is an overall schematic diagram, FIG. 6 is a detailed sectional view of a screen frame having a bucket portion, and FIG. 7 is a front view.

As shown in the figure, this dust removal device has an upper sprocket wheel 1 installed at the top of the waterway and a lower sprocket wheel 2 installed at the bottom of the waterway, and an endless link chain 3 is attached to these. It is suspended. The link chain 3 is provided with a screen frame 4 having a bucket section attached to its lower part for storing captured garbage. The upper sprocket wheel 1 is rotated in order to move the screen frame 4 around, and for this purpose a chain wheel 7 is connected via a transmission chain 6. In addition, in Fig. 5, 8 is the axis of the upper sprocket wheel 1, and 9 is the trough 1.
0 is a guide plate for guiding dust, 11 is a housing of a dust removal device, 12 is a flow channel, and arrow F indicates the direction of water flow.

Further, the screen frame 4 is attached to each pitch of the link chain 3, as shown in FIG.
A screen main body 14 made of a wire mesh or a large number of bar members arranged in the shape of a spade is attached to this. The screen main body 14 is a member that faces the flowing water, blocks the flow of dust, etc. in the flowing water, collects it, and scoops it upward into the link chain 3 by driving. An upper beam 15 is provided at the upper end of the screen body 14, and this upper beam 1
Reference numeral 5 is a pipe having a suitable diameter depending on the width of the waterway, and the center thereof is set to be located at the center of the roller 3b of the link chain 3. The screen body 14 is integrally fixed.

Further, a lower beam 17 having a U-shaped cross section is provided at the lower end of the screen body 14, and the lower beam 17 is rotatable above the upper beam 15 of the screen frame 4 adjacent to the lower beam 17. The screen main body 14 is integrally fixed via a mounting plate 18 that is provided so as to cover the screen and protrudes from the top thereof.

A side plate 19 for holding the side edge is provided at the side edge of the screen body 14, and this side plate 19 has a width wider than the link width of the link chain 3, as shown in FIG. They are integrally fixed to the left and right end surfaces of the upper beam 15 and the lower beam 17, respectively. 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. Further, the side plate 19 extends toward a bucket 21, which will be described later, and is joined to both end surfaces of the bucket 21. This screen frame 4 is attached to the link chain 3 by fixing its side plate 19 to the side surface of the link 3a with bolts 20. Further, a garbage bucket 21 is provided on the lower beam 17 so as to obliquely cover the lower front part of the screen main body 14, and its left and right ends are integrally fixed to the projecting portion of the side plate 19. There is.

In FIG. 5, reference numeral 23 denotes a backwashing spray pipe disposed on the back side of the screen body 14 which has reversed and descended via the upper sprocket wheel 1, and sprays water onto the back side of the screen body 14. This is to remove adhering dust.

According to such a dust removal device, the dust and the like floating in the flow are first blocked from flowing 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 is It further rises, and then reverses and descends at upper sprocket wheel 1. As a result, the garbage remaining in the garbage bucket 21 falls and is discharged into the trough 10 via the inclined surface of the garbage bucket 21 and the guide plate 9.

0010

[Problems to be Solved by the Invention] However, in the method of injecting spray water onto the back surface of the screen body 14 using the above-mentioned backwashing spray pipe, equipment for supplying washing water, such as a pump, piping, etc. Not only do they require equipment such as stop valves, flow valves, and spray nozzles, but they also pose problems such as running costs due to the power consumed by the pump drive motor, space required for equipment installation, and complicated maintenance. The present invention has focused on these problems, and has developed a dust remover that can quickly remove dust adhering to the screen from the screen surface and return the unclogged screen to the waterway, even in so-called emergencies when a large amount of dust is generated. The purpose is to provide equipment.

[0011]

[Means for Solving the Problems] In order to achieve the above object, in the dust removal device of the present invention, a screen frame provided with a screen for collecting dust is joined to an endless link chain, and the link chain is moved vertically. A dust removal device that is driven through a pair of sprocket wheels, in which a cleaning water pumping member is disposed on the screen frame, and a sprocket wheel is installed inside the link chain above the water surface on the upstream side of the waterway to flip the link chain upward. A reversing sprocket foil that inverts the link chain from the lower sprocket foil to the upper sprocket foil from above to the lower side, and a reversing sprocket foil that guides the link chain after passing through the cleaning tank to the upper sprocket foil. The structure includes a guiding sprocket wheel.

0012

[Operation] According to the configuration of the dust removal device of the present invention, each screen frame is attached with a cleaning water pumping member, so that it rises in the water channel, collects the dust, and stores or adheres it to the bucket or screen body. When the dust passes through the reversing sprocket and is reversed, it is swept away by the water (seawater or river water) in the channel that is scooped up by the cleaning water pumping member of the subsequent screen frame and falls downward, causing damage to the screen body and The inner surface of the bucket is cleaned. The screen frame, which has descended further downward, undergoes a second cleaning as it passes through the cleaning tank inverted and becomes clean, and then heads to the lower sprocket in the waterway via the guide sprocket and upper sprocket, and then returns again. Performs dust removal action.

[0013]

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. 1 to 4 relate to embodiments of the present invention, in which FIG. 1 is an overall vertical sectional view of a dust removal device, FIG. 2 is an enlarged vertical sectional view of a main part of FIG. 1, and FIG. 3 is a vertical sectional view of a main part of a washing water pumping member. 4 are longitudinal sectional views of the cleaning tank.

In the figure, 1 is an upper sprocket foil, 2 is a lower sprocket foil, 3 is a link chain, and 4 is a link chain.
is the screen frame, 30 is the inverted sprocket foil, 40 is
50 is a cleaning tank sprocket wheel, 50 is a guide sprocket foil, 60 is a cleaning tank, and 62 is a garbage tank. The screen frame 4 includes a screen body 14, an upper beam 15, a lower beam 17, and a side plate 1 in the same manner as described in the prior art.
9 and a bucket 21, a wash water pumping member 26 as shown in FIG. 2 or 3 is attached to the upper part of the screen frame 4, and the wash water A taken in through the waterway during the ascent is discharged when the screen is turned over. It is configured to do this. A seal rubber 28 is attached to the tip of the bent part of the cleaning water pumping member 26, and when the cleaning water pumping member 26 is turned over, the adjacent preceding screen frame 4
Lightly contact the lower end of the bucket 21 of the
It is designed to flow to the outer surface of the screen body 14 of the preceding screen frame 4.

The cleaning tank 60 is arranged above the water level on the upstream side of the waterway, and inside the cleaning tank sprocket wheel 40 is provided with a bearing so that it can rotate horizontally. is set to start rising again. A garbage tank 62 is attached to the upper downstream side of the cleaning tank 60, and a plurality of drainage holes 60d that do not allow dust to pass through are provided in a partition plate 60c serving as a boundary. A water passage hole 60a for overflow is provided at an appropriate height on the side wall of the cleaning tank 60, and an overflow pipe 6 is provided on the outside thereof.
0b is arranged.

To explain the operation of the dust removing device of the present invention constructed as described above, the screen frame 4 is lowered in the water channel by the rotation of the link chain 3 driven by the upper sprocket wheel 1, and is lowered by the lower sprocket wheel 2. When it reverses and rises, it rises while collecting dust flowing from upstream to downstream in the flow path, and is reversed by the reversing sprocket wheel 30. At this time, the wash water previously stored in the wash water pumping member 26 overflows from the tip of the wash water pumping member 26, and the screen body 1 of the adjacent preceding screen frame 4
Flows on the screen surface of 4. The dust adhering to the screen surface is washed away by this washing water and falls downward. In this way, the adhering dust on the screen surface and the captured dust C stored in the bucket 21 slide down the side wall of the dust tank 62 and fall into the dust tank 62 due to the action of gravity. The cleaning water that has fallen into the garbage tank 62 is stored in the cleaning tank 60 through the hole 60d of the partition plate 60c. The screen frame that has been cleaned after passing through the reversing sprocket wheel 30 then enters the cleaning tank 60, where it is reversed and raised. At this time, each screen frame is subjected to a second cleaning action by the cleaning water stored in the cleaning tank 60. The screen frame 4 thus cleaned returns to the waterway again via the guide sprocket foil 50 and the upper sprocket foil 1 located at the top and performs the dust collection function.

It should be noted that the water in the cleaning tank scooped up by the cleaning water pumping member 26 of the screen frame 4 which reverses and rises in the cleaning tank 60 is returned to the waterway when it reverses and descends by the upper sprocket foil 1. However, if the water collected in the cleaning tank 26 is contaminated and mixed with fine dust, and it is not desirable to flow it downstream of the waterway, as shown in Fig. 1, a The water may be discharged to a drain pipe 70 provided.

[0018]

[Effects of the Invention] As explained above, in the dust removal device of the present invention, a cleaning water pumping member is attached to the screen frame, and a cleaning tank and a sprocket wheel for reversing the cleaning tank from the bottom to the top are provided. , the screen surface can be cleaned while automatically collecting dust by simply rotating the dust remover without installing incidental equipment such as a pump, reducing equipment costs, running costs, and maintenance costs. I can do it.

[Brief explanation of drawings]

FIG. 1 is an overall vertical cross-sectional view of a dust removal device according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of the main part of FIG. 1;

FIG. 3 is a vertical sectional view of a main part of a cleaning water pumping member of a dust removal device according to an embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a cleaning tank of a dust removal device according to an embodiment of the present invention.

FIG. 5 is an overall vertical sectional view of a conventional dust removal device.

FIG. 6 is a front view of a screen frame of a conventional dust removal device.

FIG. 7 is a longitudinal sectional view of a screen frame of a conventional dust removal device.

[Explanation of symbols]

1 Upper sprocket foil 2 Lower sprocket foil 3 Link chain 4 Screen frame 14 Screen body 21 Bucket 23 Spray nozzle 26 Washing water pumping member 28 Seal rubber 30 Reversing sprocket foil 40 Cleaning tank sprocket foil 50 Guide sprocket wheel 60　Cleaning tank 60a Water outlet 60b Overflow pipe 60c Partition plate 60d hole 62 Garbage tank 70 Drain pipe

Claims (1)

[Claims] 1. A dust removal device in which a screen frame equipped with a 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, in which a cleaning water pumping member is connected to the A cleaning tank is disposed in the screen frame and is equipped with a sprocket foil inside which the link chain is reversed from the bottom to the top above the water surface on the upstream side of the waterway, and a cleaning tank is provided with a sprocket foil that rotates the link chain from the lower sprocket foil to the upper sprocket foil. A dust removal device comprising: a reversing sprocket foil for reversing a link chain from above to below; and a guiding sprocket foil for guiding the link chain to the upper sprocket foil after passing through the cleaning tank.