JPS61261510A - Dust remover for screen - Google Patents

Abstract

PURPOSE:To simplify the structure of a dust remover for a screen as well as make maintenance and control easier by a method in which plural guide rods are provided vertically on the front of a screen, and a rake is provided along the guide rods in a vertically movable manner. CONSTITUTION:When the holding of a rake 42 is released by an elevating means 44, the rare 42 goes down along guide rods 40 under its own weight. A raking piece 64 is counterclockwise turned by reaction of dust 20 accumulated on the front of a screen 18 and restored to the horizontal condition again when being passed by dust 20. The rake 42 is then raised up to the upper end of the guide rods 40 by the elevating means 44, whereupon the raking piece 64 is kept in the horizontal state by a stopper and a cam 74 and dust 20 is raked up to the upper part of a chute 46 by the raking piece 64.

Description

Detailed Description of the Invention (Technical Field) The present invention provides a dust removal device that scrapes up and removes dust collected in front of a dust removal screen installed in a waterway, such as at a water intake, a drain, or in the middle of a waterway. Regarding.

(Prior Art) As one of the dust removal devices that uses a rake to remove debris such as fallen leaves and twigs that are caught on a screen and accumulated in front of the screen to improve the flow of water, when the rake is submerged in water, To prevent the dust from being pushed down, there are two pairs of sprockets placed above and below the front of the screen, two endless chains with hooks for each pair of sprockets, and rakes attached to both chains. There is a device equipped with a drive source that drives both chains synchronously. In this dust removing device, a chain is moved by a drive source to move the rake up and down, and when the rake is raised, the rake scrapes up dirt along the screen. but,
In this kind of dust removal equipment, parts of the sprocket and chain, which are moving parts that require maintenance such as lubrication and periodic inspection, are always underwater, making it impossible to maintain them. The above-mentioned parts corrode and become inoperable. Further, since such a dust removal device uses a sprocket and a chain, the structure is complicated and expensive.

Another type of dust prevention device using a rake includes a movable body that can move up and down along a guide rod arranged in the vertical direction in front of the screen, and a movable body that extends horizontally almost parallel to the screen and that is movable. A rake is constituted by a rotating shaft rotatably supported by the body, and a plurality of scraping pieces attached to the rotating shaft at intervals in the longitudinal direction thereof and extending from the rotating shaft toward the screen, There is a dust removal device in which the rake is moved up and down along the guides er- and do by an elevating means to scrape up dust when the rake is raised. However, in this dust removal device, each scraping piece is attached to a rotating shaft supported by a movable body, so there is a partition wall in the middle of the screen that protrudes forward from the screen, that is, a partition wall that divides the screen. In addition, each scraping piece must be made longer in order to move the rotating shaft to which each scraping piece is attached far away from the screen, which increases the weight of the scraping piece and the rotational moment caused by it, and as a result, the rotating shaft and guide Since the rods must be made thicker and their mechanical strength must be increased, the device becomes larger and more expensive.

Further, in the conventional dust removal device, the scraped up dirt is dropped onto the ground near the water intake, so the scraped up trash is scattered, and the work to dispose of the scraped up trash is troublesome.

(Objective of the Invention) An object of the present invention is to provide a dust removal device that has a simple structure, is inexpensive, and can be easily maintained.

Another object of the present invention is to provide a dust removal device that allows easy disposal of scooped up dust.

(Structure of the Invention) The device of the present invention is a dust removal device that scrapes up dust in front of a screen installed in a waterway, and includes a plurality of guide rods installed vertically in the front of the screen; The rake includes a rake that is movable up and down along the guide rod, and a lifting means that is installed on the ground near the waterway and moves the rake up and down, and the rake is movable up and down along the guide rod. a movable body, a frame extending horizontally substantially parallel to the screen on the opposite side of the guide rod from the screen and connected to the movable body, and a frame spaced apart from the frame in the longitudinal direction. a plurality of supports attached to the frame and extending from the frame toward the screen; and a plurality of supports extending horizontally approximately 1,000 degrees from the screen on the screen side of the guide rod and rotatably supported by at least two of the supports. a shaft, a plurality of scraping pieces attached to the shaft and extending from the shaft in a direction substantially perpendicular to the shaft, and the own weight of the scraping piece when the scraping piece extends toward the screen. and a stopper that limits rotation of the scraping piece in the direction of the rotational force applied to the shaft.

The device of the present invention is also a dust removal device that scrapes dust in front of a screen installed in a flow channel, and includes a plurality of guide rods installed vertically in front of the screen, and the guide rods. a rake that can be moved up and down along the waterway; a lifting means that is installed on the ground near the waterway and moves the rake up and down; and a rake that receives the garbage raked up by the rake and collects the garbage at a predetermined position. The rake includes a chute and a means for transporting the garbage collected in the chute to a processing site, and the rake includes a movable body that can move up and down along the guide rod, and a movable body that is movable up and down along the guide rod, and a movable body that is arranged on the side of the guide rod opposite to the screen. a frame extending horizontally substantially parallel to the screen and connected to the movable body; a plurality of supports attached to the frame at intervals in the longitudinal direction thereof and extending from the frame toward the screen; , said Guy
□A shaft extending horizontally substantially parallel to the screen on the screen side of the dolorado and rotatably supported by at least two of the supports, and a shaft attached to the shaft and extending substantially perpendicular thereto from the shaft. a plurality of scraping pieces extending in the direction; and rotation of the scraping piece in the direction of a rotational force applied to the shaft by the mouth weight of the scraping piece when the scraping piece extends toward the screen. the chute is located behind the top of the screen and includes a collection channel extending along the screen and a water outlet for supplying water to the collection channel.

(Effects of the Invention) According to the present invention, the structure is simple because the rake is moved up and down along the guide rod. Furthermore, since the rake can be maintained in an elevated state, maintenance management is easy and corrosion of the rake can be prevented. Furthermore, since the shaft to which each scraping piece is attached is supported by a support extending from the frame attached to the movable body toward the screen, each scraping piece can be lengthened even if the frame is separated from the screen. As a result, the weight of the various lifting pieces and the resulting rotational moment are small.
The shaft, frame and guide rod can be made thinner, making it smaller and cheaper.

Further, according to the present invention, since a chute is provided to receive the 1Mk-increased garbage, the Ii%-increased garbage will not be scattered, and the processing operation thereof will be easy.

(Example) The embodiments shown in the drawings will be described below.

A dust removal device 10 shown in FIGS. 1 to 5 is a device for removing dust 20 accumulated in the front of a screen 18 installed at a water intake 16 from a dam 12 to a waterway 14. The ground near the water intake 16 is reinforced with concrete. The water intake 016 is defined by a concrete ceiling wall 22, bottom wall 24, and side wall 26 that constitute the ground in the vicinity thereof.

Further, the ceiling wall 22 is divided into two parts by a partition wall 28 located at the center in the lateral direction to support the center part.

The screen 18 includes a plurality of vertical bars 30 and horizontal bars 32. Each vertical bar 30 extends in the vertical direction of the water intake 16, is arranged at intervals in the lateral direction of the water intake 16, and is slightly inclined with respect to the vertical line so that the upper part is on the downstream side. Screen 18 is.

As shown in FIGS. 1 and 6, the water surface 34 of the dam 12
and protrudes upward from the ceiling wall 22.

As shown in FIGS. 1 to 5, the dust removal device IO includes a pair of guide rods 40 arranged in front of the screen 18, a rake 42 that can move up and down along the guide rods, and a rake 42 that can move up and down along the guide rods. It includes an elevating means 44 that moves up and down, a chute 46 that receives the trash raised by the rake and collects it at a predetermined position, and a conveying means 48 that transports the collected trash to a processing site.

Each guide rod 40 is a metal rod having a circular cross-sectional shape, and is arranged at intervals in the lateral direction of the screen 18, as shown in FIGS. 3 and 5.
It extends in the vertical direction almost parallel to the vertical beam 30 and projects upward from the water surface 34. As shown in FIGS. 3 and 5, the lower end of the guide rod 18 is fixed to the bottom wall 24 by a bracket 50, and the upper end is fixed to a support arm 54 extending from a support column 52 toward the dam 12. The support column 52 extends vertically upward from the ceiling wall 22.

The rake 42 includes a movable body 56 that is fitted on the outside of the guide rod 40 and can move up and down along the guide rod 40, and a movable body 56 that is movable in a horizontal direction substantially parallel to the screen 1B on the opposite side of the guide rod 40 from the screen 18. a frame 58 extending from the frame 58 and connected to the movable body 56; four supports 60 attached to the frame at intervals in the longitudinal direction thereof and extending from the frame 58 toward the screen 18; and a screen of the guide rod 40. Two shafts 62 extending horizontally substantially parallel to the screen on the 18 side and rotatably supported by a support 60, and a plurality of shafts 62 attached to the shafts and extending from the shafts in a direction substantially perpendicular thereto. a lifting piece 64 and first and second stops 66 attached to each support;
68.

The rake 42 divides the water intake 16 because the shaft 62 to which the raking piece 64 is attached is rotatably supported by a support 60 extending toward the screen 18 from a frame 58 attached to the movable body 56. Even with the partition wall 28, there is no need to lengthen the 1Mk lifting piece B4, and as a result, the weight of the lifting piece 64 and the resulting rotational moment are small, and the shaft 62, frame 58, and guide rod 40 can be made thinner.

The frame 58 includes two
Two connecting pieces 70 are provided at a location close to the movable body 56, and the connecting pieces 70 are connected to the elevating means 44. As shown in FIGS. 7 and 8, each connecting piece 70 extends toward the screen 18, and its tip extends upward.

As shown in FIGS. 1, 2, and 3, each shaft 62 faces a portion of the water intake divided by the partition wall 28, and is supported by two supports 60. Each axis 62
As shown in FIGS. 6 to 8, a weight 72 that applies a rotational force to the shaft opposite to the rotational force applied to the shaft by the weight of each scraping piece 64, and a stopper 66, 68 work together. shaft 62
A cam 74 is attached to limit the rotation range of the scraping piece 64 by regulating the rotation range of the scraper piece 64. The weight 72 is for horizontally balancing the rake 42 around the shaft 62. The rotational moment applied to the shaft 62 by the weight 72 and the cam 74 is slightly smaller than the rotational moment applied to the shaft 62 by the scraping piece 64, and in the opposite direction.

Each scraping piece 64 is connected by a band-shaped body 76 at the tip of each shaft 62 to which it is attached. The tip of each scraping piece 64 is located between the vertical bars 30 of the screen 18 when the scraping piece is in a posture extending toward the screen 18.

As shown in FIG. 8, each first stopper 66 comes into contact with a cam 74 when each scraping piece 64 is in a state extending toward the screen 18, and rotates the shaft 6 clockwise in FIG.
2 and the rake piece 64 are prevented from rotating. This results in
Since the rotation of the shaft 62 and the scraping piece 64 in the direction of the rotational force applied to the shaft 62 is restricted by the weight of each scraping piece 64, each scraping piece 64 is prevented from being in a downward state, and the screen It is maintained in an extended state towards 18.

As shown in FIG. 7, each second stopper 68 contacts the cam 74 and moves counterclockwise in FIG. rotation of the shaft 62 and the scraping piece 64. As a result, even if each raking piece 64 is lifted by the garbage 20 when the rake 42 descends, each raking piece 64 does not take the opposite position to that shown in FIG. Return to state.

The lifting means 44 consists in the illustrated example of a two-cylinder mechanism, hydraulic or pneumatic, the cylinders being attached to upper and lower support arms 54, 78 extending from the support column 52, and having a piston rod connected to the rake 42. The elevating means 44 is
The lifting means, which may be other means such as winches using chains, ropes, etc., may be installed directly in the ground instead of being installed in the ground via support arms 54 and support columns 52.

As shown in FIGS. 1, 4, and 6, the chute 46 includes a guide wall 80 extending further upward from the top of the screen 18, a side wall 82 facing the guide wall, and both longitudinal ends of the chute. A bottom wall 84 that slopes downward toward the center defines a collection path 86 having a double-shaped cross section.

Water discharge ports 88 are provided at both ends of the chute 46 in the longitudinal direction to discharge water toward the center, and a discharge port 90 is provided in the center to discharge garbage and water to the rear.
6 may be a water channel that slopes downward from one longitudinal end to the other end.

As shown in FIGS. 1 to 3, the conveying means 48 includes a packet 92 that receives the garbage discharged from the chute 46, and a crane 96 that lifts the packet and conveys it to a processing site 94.
and has. The crane 96 includes a hook 98 that locks the packet 92, and a hoist 100 that hoists and moves the hook. The chain hoist is disposed on beams 104 attached to support columns 101 provided near the water intake 12 and support columns 102 provided near the treatment plant 94, respectively.

When the dust removal device 10 is not in use, the rake 42 is moved by the lifting means 4.
4, it is raised to the upper end of the guide rod 40 and maintained at that position, as shown by reference numeral (A) in FIG. Therefore, maintenance and inspection can be performed with the rake 42 raised. In addition, by keeping the rake 42 raised except when in use, parts of the guide rod 40 and the lower bracket that are permanently submerged in the water are not operated.
50, and corrosion of the moving parts can be prevented. Since the cam 74 of each scraping piece 64 is in contact with the first stopper 66 due to its own weight, the scraping piece 64 is maintained almost horizontally as shown by the symbol (A) in FIG. .

The treatment plant 94 is located higher than the water intake 16. Walkways 106 and 108 for inspection are provided between the treatment plant 94 and the upper side of the water intake 12 and in the middle of the support pillar 52, and between the walkways 106 and 108 and the ground where the treatment plant 94 is installed. Ladders 110 and 112 are installed between the ground and the ground where the water intake 16 is provided.

When using QfilO, the rake 42 is released from being maintained by the lifting means 44. Thereby, the rake 42 descends along the guide rod 40 due to its own weight. During this descent,
When the dust 20 has accumulated in front of the screen 18, the scraping piece 64 is moved downward by the reaction force of the dust 20, as shown by the symbol (B) in FIG. 6 and in FIG. Since it is rotated counterclockwise in FIGS. 6 and 7, it avoids the garbage 20 and passes by, and then returns to a substantially horizontal state due to its own weight. Therefore, when the rake 42 descends, the scrap 20 is not pushed down to the bottom by the scraping piece 64.

After the rake 42 is lowered to the lower end of the guide rod 40, it is raised to the upper end of the guide rod 40 by the elevating means 44. At this time, the scraping piece 64 moves toward the first stopper 6
6 and cam 74 to keep it in a substantially horizontal state.

As a result, the garbage 20 is scraped up to above the chute 46 by the scraping piece 64.

The scraped up garbage 20 is sent to the chute 46 by the worker.
Scraped inside. At this time, the scraped up trash 20 only needs to be put into the chute 46, so the trash is not scattered and the work is easy. While scraping the garbage 20 into the chute 46,
Water is discharged into the chute 46 from a discharge port 86. For this reason.

The dust scraped into the chute is washed away by water discharged from the water outlet 88 and collected in the center of the chute 46, and further flows out from the outlet 90 into the packet 92.

After storing the garbage, the bug-2 tote 92 is lifted by a crane 96 and then transported along a beam 104 to a processing plant 94. At the treatment plant, the garbage is incinerated.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the dust removing device of the present invention, FIG. 2 is a plan view of the dust removing device, FIG. 3 is a sectional view taken along line I-1 in FIG. 1, and FIG. The figure is a sectional view taken along the line ■-■ in Fig. 1, Fig. 5 is a sectional view taken along the line V-V in Fig. 1, and Fig. 6 is for explaining the action of the rake. A cross-sectional view with a part of the dust removal device removed, FIG. 7 is an enlarged cross-sectional view of the rake to explain the action of the rake during raising, and FIG. 8 is an illustration of the action of the rake during lowering. FIG. 14: Waterway, 18 Niclean. 20: Garbage, 40 guide rods. 42: rake, 44 elevating means, 46 shoe), 48: conveying means, 56: movable body, 58□7. -4.60: support, 62:
Shaft, 64: Scraping piece, 66.68: Stopper, 86: Recovery path. Agent Patent Attorney Nobuyuki Matsunaga Figure 1 Figure 2 Figure 6 Figure 7 Figure 8

Claims (3)

[Claims] (1) A dust removal device that scrapes dust from the front of a screen installed in a flow channel, which includes a plurality of guide rods installed vertically in the front of the screen, and a vertical movement along the guide rods. The rake includes a movable body movable up and down along the guide rod, and a lifting means installed on the ground near the waterway to move the rake up and down, extending horizontally substantially parallel to the screen on the opposite side to the screen;
a frame connected to the movable body; a plurality of supports attached to the frame at intervals in the longitudinal direction thereof and extending from the frame toward the screen; and a frame connected to the screen on the screen side of the guide rod. a shaft extending horizontally substantially parallel to the shaft and rotatably supported by at least two of the supports; a plurality of scraping pieces attached to the shaft and extending from the shaft in a direction substantially perpendicular thereto; , a stopper that limits the rotation of the scraping piece in the direction of the rotational force applied to the shaft by the weight of the scraping piece when the scraping piece extends toward the screen; Device. (2) A dust removal device that scrapes up dust from the front of a screen installed in a flow channel, which includes a plurality of guide rods installed vertically in the front of the screen, and a vertical movement along the guide rods. a rake, a lifting means installed on the ground near the waterway and moving the rake up and down, a chute that receives the garbage raked up by the rake and collects the garbage at a predetermined position, and the chute. the rake includes a movable body that can move up and down along the guide rod, and a movable body that is substantially parallel to the screen on the opposite side of the guide rod from the screen. a frame extending in the horizontal direction and connected to the movable body; a plurality of supports attached to the frame at intervals in the longitudinal direction thereof and extending from the frame toward the screen; a shaft extending horizontally substantially parallel to the screen on the screen side and rotatably supported by at least two of the supports; and a shaft attached to the shaft and extending from the shaft in a direction substantially perpendicular thereto. a plurality of scraping pieces; a stopper that limits the rotation of the scraping piece in the direction of a rotational force applied to the shaft due to the weight of the scraping piece when the scraping piece extends toward the screen; A dust removal device for a screen, wherein the chute is disposed behind an upper part of the screen and includes a collection path extending along the screen, and a water outlet for supplying water to the collection path. (3) Claim No. 2, wherein the recovery path is a ramp with the center or most end portions of the screen facing downward.
Dust removal equipment as described in section.