JPH04194113A - High-speed dust cleaner - Google Patents

Abstract

PURPOSE:To effectively remove dust adhered to screen face by a method in which a spray pipe with spray nozzle is turned in concordance with the operating speed of a screen frame lowering at high speeds so that the jetting time of the spray nozzle to the screen face is longer. CONSTITUTION:A screen frame 4 with a dust-collecting screen is attached to an endless link chain 3, and the chain 3 is driven through a sprocket wheel. A spray pipe 23 to jet water at the screen of the frame 4 during the inverse lowering time of the frame 4 is horizontally set. The pipe 23 is turned in concordance with the operation speed of the frame 4 lowering at high speeds. The jetting time of the nozzle 23b provided of the pipe 23 to the face of screen becomes longer to permit dust adhered to the screen face to be removed effectively.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a high-speed dust removal device that removes dust from seawater or river water. This invention relates to an improvement of a spray pipe that sprays and cleans spray water.

[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 a bar screen or wire mesh is installed perpendicularly or almost perpendicularly to the flow direction for each link of the link chain, and by rotating this, the debris caught on the screen can be removed. There are structures that remove water outside the waterway.

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 the upper sprocket foil, 2 is the lower sprocket foil, 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 motor that transmits power to the upper sprocket wheel 1, 8 a drive shaft for the upper sprocket wheel 1, 9 a guide plate that guides the dust to the trough 10, 11
12 is the housing of the dust removal device, 12 is the water flow path, and arrow F indicates the direction of the water flow. As shown in FIG. 6, the screen frame 4 is
It is attached to each pitch of the link chain 3, and 14 is a screen body, which is made of a wire mesh or a large number of bars arranged in the shape of a plow, and is a member that prevents dust and the like from flowing water and 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. 6(a), and has an upper beam 15 and a lower beam 1.
They are integrally fixed to the left and right end surfaces of 7, 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. The side plate 19 of this frame body is connected to the link 3 by means of bolts and nuts 20.
It is fixed to the link chain 3 by fixing it to the side surface of a. 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 provided 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. There are so many things. 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 and the like adhering to the screen main body 14 are separated by the spray water and are discharged into the trough 1o 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 and rotated at a constant rotation speed by the upper sprocket wheel 1 of the teeth. Note that the L arrow indicates the link chain driving direction.

The operation of the conventional dust removal device configured as described above will be explained. When the dust removal device is installed at a water intake that takes in seawater or river water in the state shown in FIG. 4, and the link chain 3 is driven by the motor 5, which is a power device, the dust in the flowing water comes into contact with the screen body 14 and is prevented from drifting. When the screen frame 4 is blocked and floats up from the water, the garbage is stored in the bucket part 21 of the lower beam 17 by its own gravity. after that,
The upper sprocket 1 is meshed 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.

[Problems to be Solved by the Invention] In the conventional dust removal device configured as described above, the spray nozzle attached to the spray nozzle vibe 23 and the water injection hole of the spray pipe 23 is fixed, and the spray nozzle is fixed at a normal low speed ( For example, the driving speed of the screen frame is 3 m
/mm), the dust adhering to the screen surface is blown away by high-pressure water without any problem, and the dust is separated from the screen surface and discharged into the predetermined waterway 10, but when the operating speed is 1.
In high-speed dust removal equipment of 0 to 20 m/mm, the spray time to the screen surface becomes shorter in inverse proportion to the operating speed, and it often happens that the dust adhering to the screen surface cannot be completely removed. did. As a result, problems such as the screen frame landing on water during the return stroke (downward stroke) caused the dust to flow downstream, and the screen surface to be covered again during the upward stroke, increasing the water level difference before and after the dust removal device.

[Means for Solving the Problems] Therefore, in order to solve the above-mentioned problems, in the high-speed dust removal device of the present invention, a screen frame equipped with a screen for collecting dust is joined to an endless link chain. In a high-speed dust removal device in which a link chain is driven through a pair of upper and lower sprocket wheels, a spray pipe is connected to the upper sprocket wheel to inject spray water toward the screen of the screen frame to remove dust when the screen frame is reversed and lowered. The spray pipe is disposed horizontally below, and both ends are rotatably supported via bearings, and the spray pipe is rotated by chain drive or belt drive in synchronization with the rotation of the drive shaft of the upper sprocket wheel.

[Operation] In the high-speed dust removal device of the present invention, the spray pipe with the spray nozzle attached rotates in synchronization with the operating speed of the screen frame which is operated at high speed and descends, so the spray nozzle sprays onto the screen surface for a short period of time. It becomes longer and can remove all the dust attached to the screen surface.

[Example] Hereinafter, an example according to the present invention will be described in detail based on the drawings.

1 to 3 show embodiments of the present invention, FIG. 1 is a side view of the main part, FIG. 2 is a side sectional view of a spray pipe, and FIG. 3 is a view of FIG. FIG.

The high-speed dust removal device of the present invention has the same structure and operation as the conventional dust removal device except for the spray device, so a description thereof will be omitted.

Next, the spray device will be explained. As shown in FIGS. 1 to 3, the spray device is horizontally disposed at a position facing the screen 14 of the screen frame 4 which is inverted and lowered below the upper sprocket foil 1 for rotationally driving the screen frame 4. A device that injects high-pressure water from water injection holes 23a and spray nozzles 23b provided at multiple locations on the outer circumference and axial direction of the spray pipe 23 to remove dust from the screen surface and discharge it to the trough 10 via the guide plate 9. It is. The spray pipe 23 is rotatably supported by a pair of bearings 24° 24 fixed to the casing 11, and the chain wheel 8a is attached to the end of the drive shaft 8 of the upper sprocket wheel l via the chain wheel 23c attached to the l end. and is rotationally driven by a roller chain 23d.

If the upper sprocket wheel 1 is a 6-tooth wheel, while the upper sprocket wheel 1 rotates once,
Since six screen frames 4 are lowered, spray pipe 2
There are six water inlet holes 23a and spray nozzles 23b provided in the screen frame 3 at equal intervals on the outer circumference, and if the pitch circle diameter (PCD) and number of teeth of the chain foil 8a and the chain foil 23c are selected to be the same, the descending screen frame 4 and the rotating spray nozzle Since the movement of the spray pipe 23b is synchronized and moves downward while maintaining the nozzle spray angle indicated by the two-dot chain line shown in Fig. 1, the spray pipe 23 takes less time to spray onto the screen surface than the conventional spray pipe 23 of a fixed type. This increases the length and improves the effectiveness of removing dust adhering to the screen surface. High-pressure clean water enters the spray pipe 23 via the rubber hose 26 and the rotary joint 25, and is sprayed from each spray nozzle 23b. The injection material angle of the spray nozzle 23b is selected to be 60" to 120" so as to cover the screen surface, but 90" is suitable. Note that as a means for driving the rotation of the spray pipe 23, in addition to a chino drive, a belt drive, a gear transmission, or the like may be used.

[Effects of the Invention] As explained above, in the high-speed dust removal device of the present invention, the spray pipe is rotated in synchronization with the rotation of the upper sprocket foil, and high-pressure water is sprayed onto the screen surface of the descending screen frame. Because the cleaning time is increased, all the dust adhering to the screen surface can be removed. Therefore, there is no waste flowing downstream, and not only can clean water intake be ensured, but the water level difference can also be maintained at a low level.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention, with Figure 1 being a side view of the main parts, Figure 2 being a sectional side view of the spray pipe, and Figure 3 being a sectional view taken along line m-m in Figure 1. It is. 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. (a)
is a side sectional view, and FIG. 6(b) is a front view. 1... Upper sprocket foil, 2...
・Lower sprocket foil, 3.3x, 3y...link chain, 3y+...link plate (outside), 3yz...link plate (inside), 3a...link chain,
3b...Roller, 4...Screen frame (or bar frame), 5...Motor, 6
......Transmission chain, 7... Chain wheel, 8... Upper sprocket wheel drive shaft, 8a
... Cheno foil, 9... Guide plate, 10... Trough, 11... Casing, 14... Screen body, 15... Upper beam, 16...Mounting plate, 17.
...Lower beam, 18...Mounting plate,
19... Side plate, 20... Bolt nut, 21... Bucket part, 23...
...Spray pipe, 23a...Water hole, 23b...
・Spray nozzle, 23c... Cheno foil, 23d
...low chain, 24...bearing, 25
...Rotary joint, 26...Rubber hose. Patent applicant: Ube Industries, Ltd. Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] (1) In a high-speed dust removal device in which a screen frame equipped with a screen for dust collection is joined to an endless link chain, and the link chain is driven via a pair of upper and lower sprocket wheels, when the screen frame is reversed and lowered, A spray pipe that injects spray water toward the screen of the screen frame to remove dust is arranged horizontally below the upper sprocket foil, and both ends are rotatably supported via bearings. A high-speed dust removal device that rotates by chain drive or belt drive in synchronization with the rotation of the drive shaft of the upper sprocket wheel.