JP2001115435A - Trashrack rake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trashrack rake which can smoothly operate the rake while preventing the trash from being caught by the rake, a bottom part of a water passage, etc. SOLUTION: A guide frame 6 to guide a pair of endless chains 7 is provided on both sides of a screen 3 forward of the screen 3. A rake 5 stretched over the chains 7 is elevated along a front surface of the screen 3 by the traveling operation of the chains 7 to scrape the trash flowing and attaching to the screen 3. The guide frame 6 is pivotably attached in an oscillating manner by a pivot 17. When the trash is caught by the rake 5, the guide frame 6 is turned forward, the rake 5 is prevented from being locked, the guide frame 6 is returned when the trash is passed, and the rake 5 is engaged with the screen 3 again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front-surface-lowering-type dust remover for scavenging and discharging dust trapped on a screen by a rake that moves up and down along the front surface of the screen.

[0002]

2. Description of the Related Art Conventionally, a sewage treatment plant, a wastewater treatment plant, a pumping station, and the like are provided with a dust remover for removing dust in water. In such a dust remover, a pair of left and right endless chains is erected along a screen stretched in a water channel, and by the orbital operation of the chain, trash attached to the screen by a rake attached to the chain is removed. I try to fry it.

[0003] By the way, this type of dust remover is a chain,
An elevator equipped with a rake or the like is fixedly attached to a screen installed in a waterway. For this reason, the rake arranged on the upstream surface (front surface) of the screen in the water flow direction is configured so that the rake is rotated in the ascending direction so as to slide on the upstream surface (front surface) of the screen. With the front-side descent, the relatively large garbage, such as hay and driftwood, is pressed to the bottom of the waterway by the rotation of the rake, and trash is trapped between the bottom of the rake and the waterway, or In some cases, lump-like dust may be trapped between the rake and the screen. As described above, when dust is caught between the rake and the bottom of the water channel or between the screen and the dust remover fixed to the screen, the rake is locked and the dust remover stops. When the rake is locked in this manner, not only does it not function as a dust remover, but also a high load is applied to the motor that drives the chain, and there is a possibility that the motor may fail.

[0004] The present invention is intended to solve such a problem, and provides a dust remover capable of preventing the dust from being caught and operating stably without stopping the dust remover. The purpose is to do.

[0005]

According to a first aspect of the present invention, there is provided a dust remover including a screen for blocking a water channel, and a lift which moves up and down along the screen. The lift is located on the front side of the screen. A front descent comprising a pair of left and right endless chains that rotate and a rake attached to the endless chain, and the endless chain circling around to rake up and remove dust trapped on the screen by the rake. In a dust collector of a front-face-lifting type, a pivot for pivotally connecting the lift is swingably provided.

According to the above construction, in the dust remover which performs the front lowering and front scraping operation, when the rake is turned upward from the bottom at the lower end of the screen and circulates upward along the front of the screen, the rake is removed. Lumpy trash may be caught between the bottom of the waterway and the screen. In this case, the chain that constitutes the elevator, the rake, and the guide frame that guides the chain are pivotally supported by the pivot, so that the reaction force generated when dust is caught between the rake and the bottom of the water channel, etc. As a result, the guide frame rotates forward, the rake rides on the trash, and the rake separates from the screen. As a result, the garbage between the rakes passes, and thereafter, the garbage is deposited on the screen. Then, the guide frame returns by its own weight, and the rake again engages with the screen, and the rake scoops up the garbage that has landed on the screen.

According to a second aspect of the present invention, in the dust remover according to the first aspect, the elevator comprises a first region extending from a substantially lower end of the screen to an upper part of the screen;
A second region that bends from the upper end of the first region toward the downstream side, and the pivot is provided near the intersection of the first and second regions.

Thus, the first area and the second area are disposed before and after the pivot, which is the center of rotation of the elevator, and dust is caught by the weight balance of the first area and the second area. At this time, the lift force causes the elevator to smoothly rotate forward. In addition, the entire height of the guide frame can be reduced by bending the second region portion into the first region.

According to a third aspect of the present invention, in the dust remover according to the second aspect, the center of gravity of the elevator is located on the front side of the pivot, and a rotational urging force toward the screen is applied to the first region. Since the rake is provided, the rake surely engages with the screen, and the rake scooping operation is reliably performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, a dust remover 1 is configured to discharge dust that has flowed to a front surface of a vertical lattice screen 3 that is installed at an inclination in a water channel 2 by a rake 5 of a lift 4 above the water channel 2. I have. The elevator 4 of the dust remover 1 includes a pair of left and right guide frames 6,6.
And an endless chain 7, 7 attached to each of the guide frames 6, 6 so as to be movable in a circulating manner, and a rake 5 and a chain 7, 7 fixed to the endless chain 7, 7.
Is a main component.

The screen 3 comprises a plurality of parallel bar screens 3A, and left and right guide frames 6, 6 are provided on both front sides of the screen 3. The upper sides of the guide frames 6 and 6 are inclined toward the downstream side along the screen 3. Each of the guide frames 6, 6 has a first region 6A extending from a substantially lower end of the screen 3 above the screen 3, and a first region 6A bent rearward (downstream) from the first region 6A. 2 area section 6B
And That is, each guide frame 6, 6
The first region 6A and the second region 6B intersect and are bent in a U-shape as a whole. The driven sprockets 10, 11 are respectively provided at the end portions of the first and second regions 6A, 6B.
To rotatably support and guide the chain 7 to the drive sprocket 12 and the driven sprockets 10 and 11 at the intersection 6C where the first and second regions 6A and 6B intersect. The sprockets 13 are rotatably supported, and the chain 7 is hung around these sprockets 10, 11, 12, and 13, and the endless chain 7 is mounted on each of the guide frames 6, 6 so as to be freely circulated. Also, the second
The driven sprocket 11 attached to the region 6B is fixed to the guide frame 6 so as to be movable in the front-rear direction, and is wound around each sprocket 10, 11, 12, 13 by adjusting the position of the driven sprocket 11. The chain 7 can be prevented from loosening, and a proper tension can always be applied to the chain 7.

Reference numeral 15 denotes a support frame located outside the guide frames 6, 6 and standing on the water channel 2.
The pivot member 1 is attached to the bearing member 16 fixed to each of the support frames 15, 15.
7 is pivotally mounted. The pivot 17 pivotally supports the guide frame 6 of the elevator 4 so as to be swingable, and is installed between the support frames 15 and 15 so as to penetrate the intersection 6C of the guide frames 6 and 6. The left and right drive sprockets 12 are attached to both ends of the pivot 17 thus laid horizontally.
The guide frames 6, 6 are rotatably supported by a pivot 17 via a bearing member 18. As a result, the left and right guide frames 6, 6
It is supported swingably around 7. In this case, Axis 1
The distance from 7 to the end of the first and second region portions 6A and 6B is longer in the first region portion 6A than in the second region portion 6B, and the first region portion 6A is heavier in weight. Therefore, the center of gravity W of the guide frame 6 is located forward of the pivot 17 which is the center of rotation of the guide frame 6. As a result, a rotational urging force F that always rotates downward is applied to the guide frame 6.

The rake 5 has a plurality of rake claws 5A inserted into the gaps between the bar screens 3A of the screen 3 and is fixed to a mounting frame 20 laid on the right and left chains 7,7. By the circulating movement, dust that has flowed to the front of the screen 3 is scraped up and discharged to the discharge chute 21 on the water channel 2. Two sets of rakes 5,5 are fixed to the chains 7,7 at regular intervals, and the chains 7,7 are driven by the motor 8 to drive the chains 7,7.
Circulates along a guide rail (not shown) formed on each guide frame 6,6.

Reference numeral 25 denotes an endless chain for connecting the pivot 17 to the motor 8, and reference numeral 26 denotes an auxiliary chain provided on the front side of the screen 3 so as to close the gap between the lower end of the elevator 4 and the bottom 2A of the water channel 2. Screen.

Next, the operation and effect of this embodiment will be described based on the above configuration. Guide frame 6 of elevator 4
Is pivotally mounted on a pivot 17 provided between the support frames 15, 15, but the center of gravity W of the guide frame 6 is located forward of the pivot 17, which is the center of rotation of the guide frame 6. The guide frame 6 receives a rotational urging force F that rotates downward. As a result, the first area 6A of the guide frame 6 falls down toward the screen 3 installed in the water channel 2, and the rake 5 installed on the chains 7,
Engage with. At the same time, since the guide frames 6, 6 and the rake 5 are located on the front side of the screen 3, that is, on the upstream side, the rake 5 is pressed against the screen 3 by the flow of water. Therefore, the rake 5 moves upward along the front surface of the screen 3 by the running of the chains 7, 7 driven by the motor 8. Thereafter, the rake 5 that has reached the upper end of the first region 6A is shifted from the first region 6A to the second region 6B by the relay sprocket 13 and changes its posture horizontally, thereby changing the position of the second region 6B. And is moved upstream in the second region 6B by the driven sprocket 11 pivotally supported at the end of the second region 6B. And
The rake 5 is moved forward of the screen 3 by the driving sprocket 12 pivotally supported by the crossing portion 6C, descends the first region 6A downward, and is driven by a driven sprocket pivotally supported at the end of the first region 6A. The rake 5 moves upward along the front surface of the screen 3 by reversing from 10 downwards by 10 upwards. Thus, the chain 7,
The rake 5 repeats the front lowering and front scraping operation along the orbit of 7 to scrape the dust deposited on the screen 3 and discharge the dust to the discharge chute 21 on the water channel 2.
In the dust remover 1 that performs such a front lowering and front scooping operation, the rake 5 is configured to invert from the lower side to the upper side at the lower end side of the elevator 4 and to ascend along the front surface of the screen 3. When performing the operation, the lump G may be bitten between the rake 5 and the bottom 2A of the waterway 2 at the lower end of the elevator 4 (the end of the first area 6A). In this case, since the chain 7, the rake 5 and the guide frame 6 for guiding the chain 7 which constitute the elevator 4 are pivotally supported by the pivot 17 as shown in FIG. Garbage G between 2A
Is caught by the guide frame 6
1 rotates in the direction of arrow a in FIG. At the same time, the rake 5 rides over the lump
Can pass through, and the garbage G separated from the rake 5 flows to the screen 3. Thus, rake 5 and waterway 2
When the garbage G sandwiched between the bottom and the bottom 2A passes, the guide frame 6 is restored by its own weight, the rake 5 is engaged with the screen 3, and the rake 5 is swept to the screen 3 by the scooping operation of the rake 5. The dust is discharged to the discharge chute 21. Further, depending on the size of the dust G, the dust G may be interposed between the rake 5 and the screen 3 at the lower end of the screen 3, but even in this case, as described above, the guide frame 6 is moved forward. And the garbage G sandwiched between the rake 5 and the screen 3 can pass through, so that the rake 5 is lifted and the dust that has landed on the screen 3 is reliably discharged to the discharge chute 21. .

As described above, in the present embodiment, the chain 7, the rake 5 and the guide frame 6 for guiding the chain 7, which constitute the elevator 4, are pivotally mounted on the screen 3 by the pivot 17 so as to be swingable. By elevator 4
Even if dust G is caught between the rake 5 and the bottom 2A of the water channel 2 at the lower end of the rake 5, the elevator 4 rotates forward due to the reaction force, and the rake 5 separates from the screen 3. The rotation of the rake 5 does not stop. Therefore, the lock of the elevator 4 can be reliably prevented.
Furthermore, the guide frame 6 of the elevator 4 is simply pivotally mounted on the pivot 17 on the pivot 17 without using any special driving means for rotating the elevator 4 forward, and such a simple structure is employed. It is possible to reliably prevent the lift 4 from being locked by the garbage G being caught. In addition, when the garbage G is caught, the elevator 4 automatically rotates forward due to the reaction force, so that there is no need for the operator to monitor and rotate the elevator 4, and the elevator 4 is not rotated.
A series of operations such as turning forward and returning of the camera are automatically performed.

The guide frame 6 of the elevator 4 has a first region 6A and a second
Since the area 6B is located, the first area 6A and the second
When the garbage G is caught between the rake 5 and the screen 3 due to the weight balance of the region 6B, the elevator 4 can be smoothly turned forward by the reaction force. That is, since the center of gravity W of the entire guide frame 6 is located rearward from the center of the elevator 4 by the second region 6B protruding rearward from the pivot 17, when the dust G is caught, the elevator is quickly moved. 4 rotates, so that the motor 8
And the overall height of the guide frame 6 can be reduced by bending the second region 6B with respect to the first region 6A. Further, since the center of gravity W of the guide frame 6 is located forward of the pivot 17, the guide frame 6 pivotally attached to the pivot 17 is provided.
, A rotating urging force F that rotates downward always acts, so that the rake 5 can be reliably engaged with the screen 3 and, after the elevator 4 rotates forward, the elevator 4 And the rake 5 is engaged with the screen 3, and the subsequent raking operation of the rake 5 is reliably performed.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the basic structure of the dust remover such as the shape of the rake, the guide frame and the guide structure of the chain may be appropriately selected. Further, in the present embodiment, an example is shown in which the center of gravity of the guide frame is located on the front side of the pivot 17 which is the center of rotation.
The center of gravity of the guide frame may be located on the pivot axis, or the center of gravity of the guide frame may be located behind the pivot axis. That is, since the submerged portion of the elevator is pressed against the screen by the water flow, the rake is pressed against the screen even if the center of gravity of the guide frame is located slightly behind the pivot shaft. In this way, if the center of gravity of the guide frame is located behind the pivot axis, the rotating operation of the elevator when the trash is caught by the rake is performed more quickly.

[0019]

According to the dust remover of the first aspect of the present invention, there is provided a screen that blocks a water channel, and a lift that moves up and down along the screen, and the lift is positioned at the front side of the screen and rotates. A pair of left and right endless chains, and a rake attached to the endless chain, and a front lowering front scraping device that circulates the endless chains and lifts and discharges dust trapped on the screen by the rake. Since the lift type dust remover is provided with a pivot for pivotally mounting the lift, even if dust is caught by the rake at the lower end of the screen, the lift is driven by the reaction force. Since the rake is turned forward and the rake is separated from the screen, locking of the elevator can be prevented.

According to the dust collector of the second aspect of the present invention, in the dust collector of the first aspect, the elevator is configured such that the first area portion extending from a substantially lower end of the screen to an upper portion of the screen, A second region that bends from the upper end of the region toward the downstream side, and the pivot is provided near the intersection of the first and second regions. When lifted, the lift can be smoothly rotated by the reaction force.

According to a third aspect of the present invention, in the dust remover according to the second aspect, the center of gravity of the elevator is positioned in front of the pivot, and the first area is rotated toward the screen. Since the force is applied, the rake can be reliably engaged with the screen.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a floodgate according to an embodiment of the present invention as viewed from a lateral direction.

FIG. 2 is a cross-sectional view of the same floodgate as viewed from the front.

[Description of Signs] 1 Dust remover 2 Waterway 3 Screen 4 Elevator 5 Rake 6 Guide frame 6A 1st area 6B 2nd area 6C Intersection 7 Endless chain 17 Axis axis W Center of gravity

Claims (3)

[Claims] 1. A screen that blocks a water channel, and an elevator that moves up and down along the screen. The elevator is a pair of left and right endless chains that rotate and are located on the front side of the screen. A rake attached to a chain, and a front-down descending front-screw-type dust remover that circulates the endless chain to scoop up and discharge dust caught on the screen by the rake, and swings the elevator. A dust remover having a pivot that freely pivots. 2. The elevator according to claim 1, further comprising a first region extending from a substantially lower end of the screen to an upper portion of the screen, and a second region bending from an upper end of the first region to a downstream side. The dust remover according to claim 1, wherein the pivot is provided near an intersection of the first and second regions. 3. The dust remover according to claim 2, wherein a center of gravity of the elevator is located on a front side of the pivot, and a rotational urging force is applied to the first area toward the screen.