JPH0710027U - Dust remover - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure the rake's own weight drop, to be able to deal with lateral flows, and to reliably scrape debris from the rake. [Structure] An arm 10 of a rake 20 made of a perforated plate for scraping up dust collected on the front surface of a screen 2 such as a water intake 1 is made expandable and contractable by a plurality of arm bodies 10A, 10B, 10C, 10D. Support beam 1 that can swing back and forth around a horizontal axis 12 parallel to the screen 2
1 is attached to the frame 6 through the frame 1, and the rake 20 is lifted together with the arm 10 through the wire rope 26 by the hoisting machine 22 mounted on the frame 6 and is lowered by the weight of the rake 20 and the arm 10. 6 has a rake wiper 27, and the wiper body 28 has a screen 2
It is attached so as to be rotatable about a pin 38 parallel to and movable in the vertical direction, and scraped dust is forcibly scraped off from the rake 20 by the wiper 27.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust remover for screens installed in intakes, waterways, etc. of dam reservoirs.

[0002]

[Prior art]

 Conventionally, as a dust remover of this type, a rake is installed on the upstream side of the bar screen that is installed at the water intake port in an inclined shape. The rake is moved up and down by winding and rewinding the hoisting rope and is opened and closed by a rake opening wire rope. It is known that the rake comprises a rake body in which a base end of a rake frame is pivotally attached to a roller case having a main roller, and a movable rake pivotally attached to an end portion of the frame via an axis. (See, for example, Japanese Utility Model Publication No. 56-29382).

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, the rake opening size cannot be increased, and the rake is lowered by its own weight. Therefore, it is necessary to increase the rake weight. There is a problem that it is not possible to move up and down on the bar screen, and the work is very troublesome and inefficient.

The present invention has been made in view of the above situation, and an object thereof is to ensure the gravitational drop of the rake, to sufficiently cope with the lateral flow, and to make the rake opening size large. The purpose is to provide a dust remover that can surely scrape debris from the rake.

[0005]

[Means for Solving the Problems]

 In the present invention, the following technical measures are taken to achieve the above object. That is, according to the present invention, a rake arm for scraping up debris caught on the front surface of a screen such as a water channel or water intake is formed by a plurality of arm bodies, each of which is extendable and retractable via a roller, and the arm serves as a screen. It is attached to the frame via a support beam so that it can swing back and forth around parallel horizontal axes, and the hoist mounted on the frame raises the rake together with the arm through a wire rope, and the rake and the arm's own weight. It is characterized in that a rake wiper is provided on the frame to forcibly scrape up the scraped dust from the rake with the wiper.

Further, the present invention is characterized in that the rake is composed of a perforated plate, and that the wiper is vertically movable and rotatable by a drive means about a horizontal axis parallel to the screen. There are features.

[0007]

[Action]

 According to the present invention, when scraping up dust on the front of the screen, the rake is positioned at the lower limit and the tip of the rake is pressed against the screen by the arm to operate the hoisting machine. When the rake is pulled up by the wire rope, the arm keeps the rake posture while shrinking, and when the rake scrapes up the debris and reaches the upper limit, the wiper descends and then rotates downward to remove the debris on the rake. When the wiper is forcibly scraped and the scraps of dust are finished, the wiper rises and rotates upward, stopping at the rest position.

Next, the rake arm is swung forward to open the tip of the rake to the screen, and the hoisting machine is operated to rewind the wire rope. The rake flows laterally due to its own weight and the arm's own weight. It descends smoothly without being affected by, and the arm extends to reach the lower limit. Again, by swinging the rake arm backwards and pressing the rake tip against the screen, operating the hoist to wind up the wire rope allows the rake to scrape up debris.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawing, (1) is a water intake, (2) is a screen installed between the side walls (1A) in a backward slanted manner, and (3) is a slab so as to straddle over the water intake (1). It is provided in. Further, two rails (4) are laid on the slab (3) in parallel with the screen (2), and a dust remover cart (5) is movably mounted on the slab (3).

A dust remover frame (6) is erected on the carriage (5), and a front apron (7) is connected to the screen (2) at the lower front end of the frame (6). , It is installed at the same inclination angle as the screen (2), and further, a rearward (downstream) side of the front apron (7) is provided with a refuse receiving and discharging conveyor (8) across the intake port (1). , A dust input hopper (9) is formed on the conveyor (8).

A support beam (11) of the rake arm (10) is provided on the front part of the upper end of the frame (6), and a pair of left and right horizontal shafts (12) parallel to the screen (2) and a vertical support bracket (13). ), (14) so as to be swingable in the vertical direction, the beam (11) is attached to the frame (6) by a balance (15), a balance cylinder (16) and a pivot bracket (17). Driven by a drive means (18) (for example, an electric cylinder) attached via the above, and the posture is maintained.

The rake arm (10) includes a pair of left and right base arm members (10A) fixed to the front ends of the support beams (11), and upper, middle and lower arm members (10B), (10C), (10D). ) And a large number of guide rollers (19) so that it can be expanded and contracted. A rake (20) made of a perforated plate is fixed to the lower end of the lower arm body (10D), and the left and right arm bodies (10A) to (10D) are connected and integrated by a connecting member (21).

A hoisting machine (22) is mounted on the frame (6), and two winding drums (23) thereof are arranged inside the left and right frames (6), respectively. A sheave (24) is rotatably provided inside each of the horizontal axes (12), and a deflecting sheave (25) is rotatably provided inside the front end of the support beam (11) corresponding to the sheave (24). A wire rope (26) attached and wound around each drum (23) is hooked, and the tip of the wire rope (26) is connected to the rake (20).

A rake wiper (27) is attached to the upper front end of the frame (6) in the front end of the support beam (11). The wiper (27) includes a wiper body (28), a pair of left and right mounting members (29) having sliding guide rail portions (29A) fixed to the support beam (11), and left and right wiper bodies. It consists of a vertical movement cylinder (30) and left and right wiper body front-back swing electric cylinders (commonly called power cylinders) (31).

The mounting member (29) is fixed to the upper front end of the frame (6) in parallel with the screen (2), and the guide rail portion (29A) is formed on the front surface side of the sliding member (32). It is slidably fitted in the vertical direction, and the cylinder (30) is attached to the upper part of the front surface of the member (29) downward via a bracket (33) and a swing shaft (34). The metal tip (35) of the piston rod (30A) of 30) is connected to the sliding body (32) by a connecting member (36).

The metal tip (35) of the piston rod (30A) is attached to the brackets (37) fixed to the left and right end portions of the upper surface of the rear end of the wiper body (28), and the swinging body (34). The wiper body (28) is swingable in the front-rear direction about the pin (38) and is vertically movable by itself, and is connected by a pin (38) parallel to Ascend and stand by at the rest position (indicated by the chain double-dashed line (128) in FIG. 3).

The electric cylinder (31) is pivoted downward on both left and right outer ends of the front surface of the mounting member (29) via a support base (39), a pivot support bracket (40) and a horizontal pin (41). The lower end of the rod of the cylinder (31) is connected to brackets (44) fixed to the upper surfaces of the left and right ends of the wiper body (28) through a metal tip (42) and a pin (43). The electric cylinder (31) causes the wiper body (28) to rotate rearward as shown by the chain double-dashed line (228) in FIG. 3 to scrape out the debris on the rake (20) to the rear, and the hopper (9). It is supposed to be dropped inside.

Since the rake (20) is made of a perforated plate (for example, punching metal) and is curved with the same radius of curvature as the tip edge rotation locus (arc) of the wiper body (28), Debris on the rake (20) can be easily and surely scraped off by the wiper (27). The wire rope (26) can be inserted into each of the arms (10A) to (10D). An arm lower limit detector (limit switch) (45) is provided at the upper end of the base arm body (10A), and an arm upward limit detector (46) is provided at the lower end of the base arm body (10A). (47) is an operation room.

In the above-mentioned embodiment, when scraping up dust on the front surface of the screen (2) from the state of FIG. 1, the driving means (18) is operated to push up the rear end of the support beam (11). Then, the arm (10) is urged rearward and the tip of the rake (20) is lightly pressed against the screen (2) with a predetermined pressure, and the hoist (22) is operated to operate the wire rope (26). By winding up, the lower arm body (10D) rises together with the rake (20), the arm (10) contracts, and dust on the front surface of the screen (2) is scraped up by the rake (20).

When the rake (20) leaves the screen (2) and rises along the front apron (7), and just past the upper end of the front apron (7), debris falls from the rake (20), When the rake (20) reaches the upper limit, the detector (46) operates and the hoisting machine (22) stops, and at the same time, the wiper (27) descends by its cylinder (30) and the solid line in FIG. As shown by, stop at the position where the center of curvature of the rake (20) and the center of the pin (38) coincide.

Therefore, the electric cylinder (31) is operated to rotate the wiper body (28) in the direction indicated by the arrow (a) in FIG. 3 to forcibly remove the dust remaining on the rake (20). When the wiper body (28) is scraped off and stops at the chain double-dashed line (228) in FIG. 3, when the wiper body (28) returns to the direction shown by the arrow (b) in FIG. 3 again by the electric cylinder (31). At the same time, it rises by the cylinder (30) and waits at the rest position (128).

When the dust removing operation is performed again, the drive means (18) is operated to rotate the rake arm (10) forward about the horizontal axis (12) by a predetermined angle, and then the hoisting machine (2 2). ) To rewind the wire rope (26), the rake (20) is lowered by its own weight, and each arm body (10B), (10C), (10D) is also lowered by its own weight and extended. , The rake (20) does not come into contact with the screen (2) and separates smoothly to the upstream side, and when it reaches the lower limit, its detector (45) operates and the hoisting machine (22) stops. To do.

Next, the rake arm (10) swings to the downstream side (backward) via the support beam (11) by the driving means (18), and the tip of the rake (20) is lightly pressed against the front surface of the screen (2). To be Then, by operating the hoisting machine (22) and winding up the wire rope (26), the dust is scraped up as described above, and is thrown onto the conveyor (8) via the hopper (9). Be shipped.

In the above embodiment, when lowering the rake (20), the rake (20) is lowered along the screen (2) without rotating the rake arm (10) forward. By rotating the rake arm (10) forward near the water surface or at the lower limit to open the rake (20), debris can be pushed from the screen (2) to the upstream side.

The present invention is not limited to the above-mentioned embodiment, and for example, the number of arm bodies (10A) to (10D) constituting the rake arm (10) can be appropriately increased or decreased, and the pipe, the square tube, the shape member The supporting member (6) can be pivoted on the carriage (5) or can be fixed on the slab (3).

[0026]

[Effect of device]

 According to the present invention, as described above, the rake arm for scraping up dust accumulated on the front surface of the screen such as the water channel, the water intake, etc. is formed by a plurality of arm bodies, each of which is extendable and retractable via the roller, and the arm is It is attached to the frame via a support beam so that it can swing back and forth around a horizontal axis parallel to the screen, and the hoist mounted on the frame raises the rake with the arm via a wire rope, and It is characterized in that the rake and the arm are lowered by their own weight, and that a rake wiper is provided on the frame to forcibly scrape up the scraped dust from the rake with the wiper. The arm's own weight can be lowered smoothly and reliably by adding the arm's own weight, and even if there is a lateral flow, the rake does not float and the rake does not float. The opening of the key Ki out largely by increasing the swing angle of the arm, securely dust such can be scraped off from the lake, moreover, conventional rake switchgear is not necessary.

Further, in the present invention, since the rake is composed of the perforated plate such as punching metal, the wiper does not get caught in the rake, and the dust can be scraped off smoothly and reliably. Further, the present invention is characterized in that the wiper is movable in the vertical direction and rotatable about the horizontal axis parallel to the screen by the driving means, so that scraps of dust are scraped off. Can be done completely and smoothly.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged side view of the rake wiper according to the same embodiment.

[Explanation of symbols]

 1 Water intake 2 Screen 6 Frame 10 Rake arm 10A, 10B, 10C, 10D Arm body 11 Support beam 12 Horizontal axis 18 Driving means 19 Guide roller 20 Rake 22 Hoisting machine 26 Wire rope 27 Rake wiper 28 Wiper body 30 Vertical movement of wiper body Cylinder 31 Wiper body swing electric cylinder 38 pins

Claims (3)

[Scope of utility model registration request] 1. A rake arm for scraping debris on the front surface of a screen such as a water channel or water intake is made extendable and retractable by a plurality of arm bodies via rollers, and the arm is horizontal and parallel to the screen. It is attached to the frame via a support beam so that it can swing back and forth around the axis, and the rake is lifted together with the arm via a wire rope by a hoist mounted on the frame, and is lowered by the weight of the rake and the arm. Thus, the rake wiper is provided on the frame to forcibly scrape up the scraped dust from the rake with the wiper. 2. The dust remover according to claim 1, wherein the rake is composed of a perforated plate. 3. The wiper is vertically movable,
The dust remover according to claim 1 or 2, characterized in that it is rotatable about a horizontal axis parallel to the screen by a driving means.