JP2548322Y2 - Overload avoidance rake dust remover - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is installed in irrigation canals and intake channels for hydroelectric power generation, water supply and sewerage, river drainage, etc., and rakes up garbage from running water with a rake. More particularly, the present invention relates to a rake dust remover for avoiding overload of a rake elevating dust remover.

2. Description of the Related Art A rake reciprocating vertical dust remover in which garbage deposited on a bar screen in a waterway is lifted up by a rake provided up and down and removed to the upper surface of the water is disclosed in JP-A-61-78909. JP, JP-A-59-1730, JP-A-59-38527,
It is generally known as disclosed in JP-A-49-120439, JP-B-57-29612, and JP-B-57-43948.

[Problems to be Solved by the Invention] However, the conventional apparatus is characterized in that when the dust remover is operated, particularly when the rake is drawn to and engaged with the bar screen by the closing operation of the tilting cylinder at the bottom of the bar screen, each member of the rake and the bar screen. There is a problem that an overload failure occurs when a foreign object is caught between the two.

Conventionally, when such a failure occurs, the dust remover is stopped upon detecting an overload, but operation cannot be resumed unless the obstacle is removed manually. Even if there is only a small amount of obstacle on a part of the screen, the entire dust remover stops, so that the accumulation of dust on the entire screen progresses, increasing the water level difference, impeding water flow, and causing waterway and Water wheel,
There is a possibility that the functions of the main engine related to the pump or the like may be reduced or stopped.

The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to tilt a rake up / down drive device and a bar screen so as to be separated from and brought into contact with each other. For a rake reciprocating type dust remover, in which a drive device is provided separately to scrape up the refuse deposited on the front of the bar screen in the water channel with a rake, the rake and bar screen members are operated during operation of the dust remover. Even if an obstacle is caught in the middle or there is a foreign substance that exceeds the capacity at the bottom of the bar screed, the rake is prevented from detaching from the obstacle so that overloading does not occur, ensuring rake safety In addition, it is an object of the present invention to provide an overload avoidance rake dust remover that can continue the operation without temporarily stopping the dust remover.

[Means for Solving the Problems] In order to achieve the above object, an overload avoidance rake dust remover according to the present invention includes a guide frame 5 tiltably supported by a fixed portion on a water channel, and a guide frame for the guide frame 5. The rake arm 3 is held up and down so as to be able to tilt and move up and down so that the rake that scrapes up the dust that has flowed to the front of the bar screen in the waterway can be driven by individual driving devices. In the rake lifting dust remover attached to the lower end of the rake arm to lift dust from underwater, the rake is swingably supported at the lower end of the rake arm on a pivot pin at a fulcrum, and the rake is mounted. A counterweight load is attached to the rake toe so that the toe fits into the bar screen from the lower front, and the rake is A stopper is provided to keep the raising posture constant so as to be substantially horizontal.

In the above device, it is preferable that the swing range of the rake with respect to the rake arm is restricted to a certain range by the elongated hole and the pin fitted in the elongated hole.

Further, the support point of the rake with respect to the rake arm may be provided at a position deviated forward from the intermediate position so that the rear portion is heavier than the rake toe.

[Action] As shown in FIG. 1, when the rake 2 descends into the water, the rake 2 moves in a so-called loosely opened state separated from the bar screen 1 by the action of the tilting cylinder 10 and reaches the bottom of the bar screen. Then, the tilting cylinder again engages the bar screen 1 to be in a closed state. As the lifting block 6 moves upward, the water rises in the water, and the dust deposited on the front surface of the bar screen 1 is lifted up to the upper part of the water.

Now, as shown in FIG. 2 (a), when the rake 2 is drawn toward the bar screen 1 by the closing operation of the tilting cylinder at the bottom of the bar screen and tries to bite, foreign matter is caught between the two members. The rake 2 swings downward about the pivot pin 4 as a fulcrum against the set load to avoid obstacles (foreign matter) as shown in FIG.

Also, when a foreign object is caught between the two members while the rake 2 is being lifted, that is, while the rake 2 is cleaning up dust, the rake supports the pivot pin 4 when a load exceeding the set load is applied to the rake. As shown in FIG. 3 (c), the vehicle moves upward while avoiding obstacles.

In addition, as shown in FIG. 5B, the rake 2 functions to remove foreign matter from the biting state during this avoiding operation. Therefore, foreign substances can be removed during this avoidance operation or in the dust removal operation in the next cycle.

When the obstacle is avoided, the rake 2 is again given the set load by the load of the counterweight 8, and returns to the original lifting position.

The distance between the rake and the bar screen when the rake 2 is lowered can be freely changed by adjusting the tilt cylinder 10. The lowering position (lower limit position) of the rake can also be changed by a limit switch or the like. Therefore, if there is a foreign substance exceeding the ability at the lower part of the screen, it can be avoided by changing the lower limit position.

[Example] The dust removers to which the present invention is applied are a rack type single rake reciprocating type dust remover, a telescopic boom, or a multi-stage cylinder type dust remover. 1 shows a rake reciprocating type dust remover.

In FIG. 1, reference numeral 1 denotes a bar screen which is set so as to be orthogonal to a water channel, and rakes up the dust deposited on the front surface of the bar screen with a rake 2 and carries the dust to the water surface while draining the water.

The rake 2 is attached to the lower end of the rake arm 3 via a pivot pin 4 so as to be swingable.
The rake toe 2a is fitted into the bar screen 1 so as to engage with the bar screen 1 by the reaction force, and the stopper 9 and the rake roller 11 hold the rake up position substantially horizontally.

The reaction force of the counterweight 8 is set so as to be able to withstand the load for scraping up dust by the rake or the overload set load of the drive system or the like. Therefore, the counterweight 8 is provided so that the reaction force of the set load can be freely adjusted.

The rake arm 3 to which the rake 2 is attached is attached to an elevating block 6 that moves up and down along the guide frame 5.

The guide frame 5 is pivotally supported by a gantry 12 framed above the water so that the middle part can be freely tilted to a bracket 13 by a pivot 14 and the upper end is pulled by a tilt cylinder 10 when necessary.
The rake 2 is separated from the bar screen 1 by tilting the rake 14.

The lifting block 6 is pulled up and down by a chain 17 hung on a chain wheel 15.16 provided at both the upper and lower ends of the guide frame 5, and the pinion gear 20 meshing with the rack 18.19 is rotated by the lifting movement of the lifting block 6. To move the rake arm 3 up and down.

A rake lifting / lowering motor 21 is provided at the upper end of the guide frame 5, and the motor drives the chain 17 via the upper chain wheel 15.

FIG. 3 shows a configuration in which the swing range of the rake 2 with respect to the rake arm 3 is restricted to a certain range by the elongated holes 22 and the pins 23. As shown in FIG. 3, the bracket 2c protrudes upward from the rake shelf plate 2b. And the bracket is pivotally attached to the lower metal part 3a of the rake arm 3 by the pivot pin 4. Long hole
Reference numeral 22 denotes a configuration in which a pin 23 formed on the lower metal part 3a and provided laterally on the rake side is fitted into the elongated hole 22.

FIG. 5 shows a configuration in which a stopper 9 is provided on the rake side, and the stopper 9 comes into contact with the receiving portion 3b on the rake arm 3 side so that the rake 2 can be kept in a constant lifting position.

The counterweight 8 is attached to the rear end of the rake shelf 2b so that its attachment position can be changed. In FIGS. 3 and 5, reference numeral 27 denotes a bolt hole for attaching the weight, which is provided in a plurality of rows.

[Effects of the Invention] Since the present invention is configured as described above, a drive device for raising and lowering the rake and a drive device for tilting the rake so as to be separated from and brought into contact with the bar screen are separately provided, respectively. For a rake reciprocating type dust remover that rakes up the dust deposited on the front of the screen with a rake, if an obstacle is caught between the rake and each member of the bar screen during operation of the dust remover, an overload failure will occur. It is possible to keep the rake safe from departures from obstacles so as to prevent the occurrence of dust, and to continue the operation without temporarily stopping the dust remover. Can remove foreign matter from the bar screen by acting so as to separate the foreign matter from the biting state during the scraping operation while avoiding obstacles. Further, in the case where foreign matter exceeding the capacity exists at the lower part of the bar screen or the like, foreign matter avoidance control can be easily performed by operating the lower limit position of the rake and opening and closing operations before and after.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view of a single rake reciprocating type dust removing apparatus, and FIG. 2 (a).
FIGS. 3 (b) and 3 (c) are side views of the main part showing the order of the rake avoiding operation when an obstacle is caught between the rake and each member of the bar screen, and FIGS. It is an expanded longitudinal side view which shows an example. DESCRIPTION OF SYMBOLS 1 ... Bar screen, 2 ... Rake 3 ... Rake arm 4, ... Pivot pin 5 ... Guide frame, 6 ... Elevating block 8 ... Counter weight, 9 ... Stopper 10 ... Tilt cylinder, 11 ... ... Rake roller 21 ... Rake elevating motor, 22 ... Long hole 23 ... Pin, 2a ... Rake toe

Claims (3)

(57) [Scope of request for utility model registration] 1. A guide frame (5) supported on a fixed portion on a water channel so as to be tiltable, and a rake arm (3) held up and down with respect to the guide frame. The rake 2 is mounted on the lower end of a rake arm 3 that can be tilted and moved up and down so that the rake 2 that picks up the attached dust is driven by a separate drive device so that the dust is scraped from underwater. In the dust remover, the rake 2 is replaced with a rake arm 3.
At the lower end, a pivot pin 4 is swingably supported and attached to a fulcrum, and a load is applied to the rake 2 by a counterweight 8 in a direction in which the rake toe 2a fits into the bar screen 1 from the lower front. An overload avoidance rake dust remover, wherein the rake (2) is provided with a stopper (9) for keeping the scraping position constant so as to be substantially horizontal. 2. The overload avoidance rake dust removing device according to claim 1, wherein the swing range of the rake 2 with respect to the rake arm 3 is restricted to a certain range by a long hole 22 and a pin 23 fitted in the long hole. . 3. The overload avoidance rake dust remover according to claim 1, wherein a support point of the rake 2 with respect to the rake arm 3 is provided at a position deviated forward from an intermediate position so that a rear portion becomes heavier than a rake toe 2a. .