JPS5940965B2 - Telescopic boom type rake dust remover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rake scraping-type dust remover installed in intake channels, settling basin channels, etc., in which the rake is attached to a multi-stage telescopic boom that extends and moves up and down by winding and unwinding a wire rope. By operating the rope, the rake is raised and lowered and the rake is opened and closed relative to the bar screen, and when the rake is lowered, the rake is placed in a downward position, and the rake can be forced into the water easily and reliably.

The details will be explained below with reference to the embodiments shown in the drawings.

In FIG. 1, 1 is a bar screen installed in a waterway a, and 2 is a rake for scraping up and removing debris that has landed on the front surface of the bar screen 1 from below. is attached to the lowermost end of a telescopic boom 3 consisting of a plurality of upper and lower stages so as to be openable and closable relative to the bar screen 1 with a hinge bin 4 as a fulcrum, and moves up and down along the bar screen 1.

5 is a lifting drum installed on a fixed base 6 above the water;
Tensioning drums 7 are provided at corresponding positions, and both drums 5, 7
A wire rope 8 is hung on the sheave 9, one end 8a of the rope 8 is attached to the rake 2, and the other end 8b is attached to each telescopic boom 3.
10. It is fixed to the upper end of the lowermost telescopic boom 3a via 11 and 12, respectively, and the lifting drum 5 is driven by the drive device 13.
When the rake 2 is rotated in the forward and reverse directions, the tension of the rope 8 extends or shortens the 3 telescopic booms, and the rake 2 is raised and lowered.

The rake side lobe 8' has a fixed sheave 14. 15. 16
The movable sheave 1 is guided to the drum 7.5 through the drum 7.5, and its middle part is connected to a traction device 17 such as a hydraulic or electric cylinder, and the movable sheave 1 is provided at the upper end of the piston 17b of the cylinder 17a.
When 8 is lowered by a certain distance, the loaf is tensed and the rake is closed, and the rake 2 is oriented to engage the bar screen 1.

Raking with the rake 2 is performed with the rake closed.

Next, when the tension on the rope by the movable sheave 18 is released, the rake 2 is directed downward and the rake is opened as shown in FIG.

The lowering operation of the rake 2 is performed with the rake 2 in the open state.

Although the telescopic boom 3 is shown as having three stages in the illustrated example, it is natural that it may have two or more stages, and the uppermost stage 3c is used as a swing guide, and the lower stage 3b,
3a are housed in sequence, and the uppermost part 3c is supported on a fixed base 6 so as to be able to swing back and forth about a pivot 19, and when a special need for lowering the rake is required, a swinging mechanism 20 such as a hydraulic or electric cylinder is used. It is configured so that it can be pushed by.

Conventional lobe-type dust removers generally use the rake's own weight to lower the rake, so if large particles of highly buoyant debris land on the water surface in front of the bar screen, the rake Often, the dust remover would run aground on the bulky debris and prevent it from descending into the water, making it unable to perform its function as a dust remover.

For this reason, a method of increasing the weight of the rake more than necessary has been considered, but this method has the drawback that the capacity of the drive device becomes large and the device also becomes large, making it impractical.

In addition, a hydraulic type dust remover has been developed that uses a hydraulic cylinder and attaches the rake to the tip of the hydraulic cylinder in order to force the rake to descend, but this increases the cost of the hydraulic equipment and requires complicated maintenance in the event of an oil leakage failure. At present, it has some drawbacks and has not yet reached the level of practical use.

The present invention improves on such conventional drawbacks, and as described above, one end of the lobe wrapped around the lifting drum is attached to the rake at the lowest end of the telescopic boom, and the other end is attached to the top and bottom of each telescopic boom. They are fixed to the upper end of the lowest stage telescopic boom through the ropes, and the telescopic boom is forcibly extended and lowered by hoisting the boom side rope, and a part of the rake side rope is connected to the traction device for lifting. The telescopic boom is reliably raised and lowered by operating the lobe by rotating the drum forward and backward, and the rake is pulled into the water from below, making forcible entry into the water powerful and reliable, and rake over large debris. The work can be done smoothly without any force that might run on the machine and prevent it from descending.

Furthermore, by tensioning or relaxing a part of the rake side rope by the traction device, the rake can be opened and closed during the lifting and lowering operations, and the structure is simple and can be implemented at low cost.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the telescopic boom type rake dust remover of the present invention, and FIGS. 2 and 3 are diagrams illustrating its operation.
The former shows the time of expansion, and the latter shows the time of contraction. 1... Bar screen - 2... Rake, meter... Telescopic boom, 4... Hinge pin, 5... Lifting drum,
6... Fixed base, 1... Tensioning drum, 8... Lobe, 9゜10.11, 12... Sheave, 13... Drive device, 14.15.16... Fixed sheave , 17...
- Traction device, 19... Pivot, 20... Swing mechanism.

Claims (1)

[Claims] 1 A rake that lifts up debris that has washed up on the front of the bar screen in the waterway is attached to the lowest end of the telescopic boom so that it can be opened and closed using a hinge pin as a fulcrum, and is also wrapped around a lifting drum installed on a fixed base at the top of the waterway. One end of the rope is fixed to the rake, and the other end is fixed to the upper end of the lowermost telescopic boom through a sheave provided from the top to the bottom of the upper telescopic boom, and the telescopic boom is raised by winding up the boom side rope. A telescoping boom type rake dust remover, characterized in that the rake is forcibly extended and lowered, and a part of the rake side rope is connected to a traction device such as a hydraulic or electric cylinder.