JPH0444661Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a rake that removes dust and debris from bar screens placed in dams, river intakes, pumping stations, water treatment plants, etc. Regarding type dust remover.

(Prior Art) Conventionally, dust collected by bar screens installed in waterways, water intakes, etc. is scraped up and removed by various types of dust removers. One type of dust remover employs a wire rope type in which a rake is raised and lowered along a screen using a wire rope.

(Problems that this invention is trying to solve) This conventional dust remover has problems such as when the rake is stuck on a large piece of dust near the water surface and cannot descend, or when there is a sideways water flow. There are other problems, such as the dust flowing sideways, making it difficult to scrape up the dust, and the inability to scrape up large dust piles or dust that has eaten into the bar screen.

This invention was made in order to solve the above-mentioned problems.

(Means for solving the problem) This invention is based on a dust removal machine equipped with a rake that scrapes up dust that is stuck to the entire surface of a screen such as a waterway. The frame is pivotally connected via a horizontal axis so as to be able to swing back and forth, an arm truck to which the upper end of the rake arm is attached is arranged between the rake elevating guide frames, and a drive shaft parallel to the horizontal axis is pivotally attached to the arm truck. A rack or similar means is provided within the rake lifting guide frame over almost its entire length, and a pinion pivotally connected to both ends of the drive shaft is engaged with the rack, and the drive shaft is mounted on an arm truck. A rake cart is provided on the rake arm, which is rotatably driven by a drive device, and the upper chain wheel of the chain wound vertically within the rake arm is directly or indirectly rotated by the drive shaft, and the rake arm is provided with a rake cart that moves up and down using the drive shaft as a guide. The truck is latched to the chain, a rake is attached to the rake truck, and the rake elevating guide frame is configured to swing back and forth by a cylinder device or the like.

(Function) According to the dust remover according to this invention, when the machine is put into a rest state, when the drive device is operated to rotate the pinion, the pinion moves on the rack in the rake lifting guide frame and the arm truck moves. As it rises, the chain within the rake arm rotates, causing the rake arm to rise, and the rake truck also rises along with the rake arm. Therefore, the rake is raised twice as fast as the rake cart, reaches its upper limit, and stops at a position considerably above the water surface. Next, when performing dust removal work, use the cylinder device to pull the upper end of the rake lifting guide frame backwards, push the rake forward, and then operate the drive device to rotate the pinion in the opposite direction. When the arm truck is lowered, the chain rotates and the rake descends along the rake arm at twice the speed of the arm truck and is immersed in the water. Then, when the rake reaches its lowering limit, the drive device is stopped, and at this time, the rake is positioned near the bottom of the waterway on the upstream side of the garbage, a predetermined distance ahead of the bar screen. Therefore, when the cylinder device is operated to push the upper end of the rake elevating guide frame forward, the rake moves while scraping up the debris in the water downstream, that is, toward the bar screen, and stops when it comes into contact with the bar screen. At this time, the lower end of the rake is located at the lower end of the bar screen and is pressed against the bar screen, and in this state, the drive device is operated again to rotate the pinion, and the rake trolley is moved in the same manner as in the above-mentioned rest state. When the bar screen is raised, the rake rises while scraping up the front of the screen and any debris hanging on it, and when it passes the top of the front apron above the bar screen, the debris on the rake falls onto the chute provided at the rear of the apron. At the same time, a dirt scraping device is activated on the rake to completely remove the dirt on the rake, and the drive device is stopped during the ascent and descent. Therefore, it is sufficient to perform the dust removal work by repeating such operations as necessary.

(Example) Hereinafter, an example of this invention will be described in detail with reference to the drawings. In this embodiment, the dust removal mechanism is of a stationary type, but it goes without saying that the same structure may be used even if it is of a traveling type.

In the drawing, 1 is a waterway, 2 is a waterway side wall, 3 is a slab, and 4 is a bar screen installed between and across the waterway side walls 2, and the slab 3 is located close to the upper downstream side of the screen 4 and is connected to the waterway side wall. It is set up so as to straddle 1. On the top of the waterway side wall 2, there is a gate-shaped dust removal mechanism frame 5 that straddles the bar screen 4.
is provided, and a dust receiving and carrying out conveyor is provided directly above the slab 3 under the frame 5. Reference numeral 7 denotes a front apron, which is located very close to the top of the bar screen 4 and is sloped like the bar screen 4, and is connected to the upper end of the side plate 8 of the conveyor 6 located behind the front apron 7 and the upper end of the front apron 7. A dust input chute 9 is provided between the two. 10 is a rake, 11, 12 are a pair of left and right rake rods, 13, 14 are rake carts connected to the upper ends of the rake rods 11, 12, 15, 16 are rake arms, and the upper ends of both arms 15, 16 are arm carts 17
is connected to.

The rake arms 15 and 16 are formed by opposing grooves of groove members and connected at regular intervals.The rake arms 15 and 16 are located outside the groove members of each rake arm 15 and 16, and are connected to the plate-shaped bases 13A and 14A of the rake carts 13 and 14. The plate-like base bodies 13A and 14A are connected by shafts 19 and 20 to which wheels 18 are pivotally mounted.

21 is a pair of left and right rake lifting guide frames,
The frame is constructed in a rectangular shape connected by upper and lower connecting members 22 so that the grooves of the channel members face each other. A mounting bracket 23 is provided protruding from the front side of the approximately central portion of the rake lifting guide frame 21, and a horizontal shaft 2 is attached to both the left and right brackets 23.
4 is fixed, and both ends of the horizontal shaft 24 are rotatably supported by bearings 25 mounted on the frame 5. And the rake lifting guide frame 21
An arm truck 17 is provided between them so as to be movable up and down via wheels 26 and 27. Further, a roller chain 28 is stretched over almost the entire length on one side of the inner surface facing the flange of each channel member of the rake elevating guide frame 21, and a drive shaft 29 is connected to the roller chain 28 (which may be a rack or similar means). Pinions 30 wedged at both ends are engaged. The drive shaft 29 passes through the arm carriage 17 in the left-right direction and is rotatably supported horizontally. A chain wheel 34 driven by a transmission chain 33 which is hung on the chain wheel 32 is wedge-attached. In addition, 3
An idle chain foil 5 is hung on the chain 33, and is moved by a take-up device 36 mounted on the arm truck 17 to tension the chain 33. Furthermore, drive shaft 2
Chain wheels 37 and 38 are wedge-connected to the center line of the rake arms 15 and 16, respectively, and the chain wheels 39 and 40 are wedge-connected to the center lines of the rake arms 15 and 16, respectively.
1, 42 are wound around this chain 41, 42.
are locked to rake carts 13 and 14.

Reference numeral 43 denotes a cylinder device (electric power cylinder) for swinging the rake elevating guide frame 21 in the front-rear direction, and the cylinder device 43 is supported parallel to the horizontal axis 24 by a bracket 45 on a support stand 44 mounted on the upper surface of the center of the rear end of the frame 5. The rod 47 is pivotally supported by a shaft 46 so as to be able to swing vertically, and the tip of a rod 47 extending forward is attached to the rear surface of the upper end of the rake lifting guide frame 21 via a horizontal pin 48 and a bracket 49.

A wiper 50 scrapes dust off the rake 10, and both ends of its arm 51 are pivotally connected to the rake lifting guide frame 21 by pins.

In addition, stoppers (not shown) are attached to the upper and lower ends of the rake elevating guide frame 21 to start and stop the arm truck 26, that is, to start and stop the drive device 31.

Next, to explain the case where dust removal work is performed by the dust removal machine in the embodiment of this invention, the rake 10 shown by a solid line in FIG.
It is located at the lower end of the front surface of the bar screen 4, and when the drive device 31 starts moving in this state, the drive shaft 29 of the arm truck 17 rotates, and the pinion 30 and chain wheels 37, 38 rotate, so the pinion 30 is connected to the roller chain. At the same time as the chains 41 and 42 move due to the rotation of the chain wheels 37 and 38, the rake carts 13 and 1
4 rises using rake arms 15 and 16 as guides. In this way, the rake 10 rises, scoops up the dust hanging on the bar screen 4, and when the rake 10 reaches the position indicated by reference numeral 101 at the upper end of the front apron 7, the dust falls onto the input chute 9. When the rake 10 further rises, the wiper 50 comes into contact with the rake 10, and as the rake 10 rises, the wiper 50 also rotates backward to move the dust to the tip of the rake 10 and forcibly drop it. Then, at the position where the rake 10 is indicated by reference numeral 102, the arm truck 17 and the rake truck 13,
14 reaches the upper limit of the position indicated by reference numerals 172 and 142 in FIG. 2, and the drive device 31 automatically stops.
The tip of the wiper 50 moves to the tip of the rake 10, and forced scraping of dust is completed. When the cylinder device 43 is operated and the upper end of the rake lifting guide frame 21 is pulled rearward, the rake 1
0 moves forward, so it is possible to stop the operation and put it into a rest state. Furthermore, when starting dust removal work, when the drive device 31 is operated to rotate the drive shaft 29 in the opposite direction, the arm truck 17
Then, the rake carts 13 and 14 descend, and the rake 1
0 reaches the lowering limit shown by reference numeral 103 in FIG. is pushed forward, and the rake 10 is pushed forward, while the rake 10
The cylinder device 43 moves toward the bar screen 4 while scraping up dust, and when it comes into contact with the bar screen 4, the cylinder device 43 stops. When scraping up dust again, drive the drive device 31 in the same way as described above to move the arm truck 17.
By raising the rake 10, the rake 10 is raised twice as fast as the arm truck 17, and the dust removal work is performed smoothly and reliably.

In the embodiment of this invention, the dust removal mechanism frame 5 is of a fixed position type, but it goes without saying that the frame 5 may be of a traveling type.

(Effects of the invention) Since the dust remover according to this invention is constructed as described above, the structure is strong and simple, and most of the mechanical parts such as the drive unit are easy to inspect by people on the ground. Because of its location, maintenance and inspection are extremely easy.The rake is forcibly raised and lowered by a chain and smoothly along the rake arm, so even if there is dust on the water surface, it can be lowered reliably and quickly. Because the cylinder device forcibly crimps the rake through the rake lifting guide frame, rake arm, etc., there is no problem such as separating from the bar screen or opening due to the weight of the dust and causing the dust to fall. When a large amount of dust accumulates in front of the screen, it is easy to flush it downstream of the main river.Furthermore, the rake arm, rake cart, etc. can be stored in the rake lifting guide frame, reducing the overall height of the dust remover. In addition to being able to remove dust from deep water areas, it also has many benefits, such as being able to be configured without the use of hydraulic equipment.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a partially omitted front view, and FIG. 2 is a longitudinal sectional side view taken along line A--A in FIG. 1. 1... Channel, 2... Channel side wall, 4... Bar screen, 5... Dust removal mechanism frame, 7... Front apron, 10... Rake, 13, 14... Rake truck, 15, 16... Rake arm , 17... Arm trolley, 21... Rake lifting guide frame, 24
...Horizontal shaft, 25...Bearing, 26, 27...Wheel, 28...Roller chain (rack), 29...
Drive shaft, 30... pinion, 31... drive device,
32, 34, 37, 38, 39, 40... Chain foil, 33, 41, 42... Chain, 43...
cylinder device.

Claims (1)

[Scope of utility model registration request] In a dust removal machine equipped with a rake that scrapes up dust hanging in front of a screen such as a waterway, a pair of left and right rake elevating guide frames are pivoted via a horizontal axis on the dust removal mechanism frame so as to be able to swing back and forth. An arm truck having an upper end of the rake arm attached is disposed between the rake lifting guide frames, a drive shaft parallel to the horizontal axis is pivotally connected to the arm truck, and the rake arm is mounted within the rake lifting guide frame over almost its entire length. A rack or similar means is provided, and pinions wedged on both ends of the drive shaft are engaged with the pinion, and this drive shaft is rotatably driven by a drive device mounted on the arm carriage, and the upper and lower parts of the inside of the rake arm are The upper chain wheel of the chain wound downward is directly or indirectly rotated by the drive shaft, and the rake arm is provided with a rake truck that moves up and down using this as a guide, and this rake truck is latched to the chain. This dust remover is configured such that a rake is attached to a truck, and the rake elevating guide frame is oscillated back and forth by a cylinder device or the like.