JPH08326035A - Back rake type automatic dust collector - Google Patents

Abstract

PURPOSE: To discharge residue sufficiently in the residue discharging section of a screen. CONSTITUTION: This automatic dust collector has a screen 51 consisting of a linear section 51a, an inversion section 51b and a residue discharging section 51c, a main chain 54 made to travel along the screen 51, a rake 55 fixed onto the main chain 54, a lever 76 with a guide roller 81 and a support roller 82, and a support rail 71 guiding the support roller 82. The lever 76 is rocked with the travelling of the main chain 54, and the rake 55 can be rocked to the main chain 54 through a rake shaft 63. The quantity of the support roller 82 delayed to the guide roller 81 at a time when the support roller 82 is made to travel along the inversion section 51b is made larger than that at the time when the support roller 82 is made to travel along the linear section 51a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back rake type automatic dust remover.

[0002]

2. Description of the Related Art Conventionally, a sand basin of a sewage treatment plant, a drainage station,
In facilities such as agricultural waterways and sand basins of water purification plants, the residue of water, dust, etc.
Various automatic dust removers are provided to remove the dust.
In the automatic dust remover, a chain drive type rake is arranged along a screen stretched over a water channel or a sluice, and scrapes on the screen are scraped up by the rake. However, when the rake is raised on the upstream side of the screen and the frying is started, in the area where the rake is bitten into the screen, the residue is pressed or pinched by the screen. , The automatic dust remover will be stopped, and the residue will fall into the waterway.

Therefore, there is provided a back rake type automatic dust remover in which the rake is raised on the downstream side of the screen so that the residue will not be pressed or pinched by the screen. 2 is a vertical sectional view of a conventional back rake type automatic dust remover, and FIG. 3 is an enlarged view of a main part of the conventional back rake type automatic dust remover.

In the figure, reference numeral 51 denotes a screen formed by arranging a plurality of flat steel members in parallel. The screen 51 is tilted in water to stand up, and a straight portion 51a protruding above the water surface, Inversion portion 51 extending from straight portion 51a over an angle of approximately 180 °
b, and a residue discharge part 51c extending linearly obliquely downward from the reversing part 51b.

On the downstream side of the screen 51 in the water flow direction (the direction of arrow A), a main service chain 54 is arranged along the screen 51 in an inclined manner. The main chain 54 is stretched between a first sprocket 56 fixed to the drive shaft on the water surface and a second sprocket 58 rotatably arranged in the water, and an arrow shown in FIG. Be driven in the direction.

Further, rake bearings 61 are formed at a plurality of set points of the main service chain 54, and the rake bearings 6 are formed.
The rake shaft 63 is rotatably supported by 1. The rake 55 is swingably supported by the rake shaft 63. The rake 55 has a plurality of rake claws 75, and each of the rake claws 75 is projected in a comb shape. further,
A lever 76 is fixed to the rake shaft 63, and the lever 7
6 eccentrically supports the guide roller 81 and the support roller 82 with respect to the rake shaft 63. A track-shaped support rail 71 for running the support roller 82 is formed on the downstream side of the screen 51 in the water flow direction. Therefore, while the rake 55 moves upward along the screen 51, the rake bearing 61 moves between the main body frame 84 and the support rail 71 via the main roller (not shown) and the main chain 54.
The support roller 82 is caused to travel along with the support rail 71.

The support rail 71 has a screen 5
It is composed of two straight line portions that are inclined and rise along 1 and project and extend on the water surface, and two semi-circular portions that connect between the end portions of the straight line portions. The semicircular portion below the support rail 71 is placed at a position lower than the second sprocket 58. In the semi-circular locus of the guide roller 81, a meniscus 91 is disposed radially outward of the outer peripheral edges of the first sprocket 56 and the second sprocket 58, and a guide groove formed in the meniscus 91. The guide roller 81 is guided by 92.

Accordingly, when the motor chain is driven by driving the motor, each rake pawl 7 of the rake 55 is moved.
5 is projected from the screen 51 in the vicinity of the floor surface 14 in the water, and then rises along the screen 51 to scrape off the residue. Then, the screen 51 on the water surface is inverted at the inversion portion to drop the residue. Further, the lever 76 is swung along with the traveling of the main duty chain 54, and the rake 55 is also swung.

In this case, after the rake 55 is projected from the downstream side to the upstream side of the screen 51, the rake 55 is raised, so that the residue remains on the screen 51.
It will not be pressed or pinched by.

[0010]

However, in the conventional back rake type automatic dust remover, the rake 55 is used.
While the rake claw 75 is running along the straight portion 51a of the screen 51, the rake 55 extends in a direction perpendicular to the screen surface, but the rake 55 is run along the reversing portion 51b of the screen 51. Rake claw 7 while
5 gradually falls backward, and the rake 55 removes the residue 51c.
The rake claw 75 when traveling along the lane becomes substantially parallel to the tangential direction of the service chain 54.

Therefore, the screen residue discharge portion 51c of the screen 51 cannot sufficiently discharge the screen residue,
Hair, threads, etc. are dragged between the screens 51 and become entangled. Further, since the support rails 71 guide the support rollers 82,
It is necessary to increase the accuracy of the support rail 71.

According to the present invention, it is necessary to solve the problems of the conventional back rake type automatic dust remover so that the residue of the screen can be sufficiently discharged at the residue discharge part of the screen, and the precision of the support rail is required to be high. It is an object to provide a back rake type automatic dust remover that does not have the above.

[0013]

Therefore, in the back rake type automatic dust remover of the present invention, the back rake type automatic dust remover is formed by arranging a plurality of flat steel members in parallel, is inclined in water, and is started up. A straight part projecting from the straight part, a reversing part extending from the straight part, and a residue discharge part extending obliquely downward from the reversing part, and a screen running downstream of the screen in the water flow direction. A main chain, a rake fixed at a plurality of set points of the main chain, a lever fixed to the rake and provided with a guide roller and a support roller, and a support rail for guiding the support roller.

Then, the delay amount of the support roller with respect to the guide roller when traveling along the reversing portion is
It is more than when traveling along the straight line portion. In another back rake type automatic dust remover of the present invention, further, a pair of guide rails is arranged corresponding to the tip of the screen, and the trajectory of the guide rollers guided by the guide rails is set in the water flow direction. Bias to the downstream side.

[0015]

According to the present invention, as described above, in the back rake type automatic dust remover, it is formed by arranging a plurality of flat steel members in parallel, is tilted up in water and rises, and protrudes above the water surface. A straight line portion, a reversal portion extending from the straight line portion, and a screen including a residue discharge portion that extends obliquely downward from the reversal portion, and a main task to run along the screen on the downstream side of the screen in the water flow direction. A chain, a rake fixed to a plurality of set points of the main chain, and fixed to the rake,
The lever has a guide roller and a support roller, and a support rail for guiding the support roller.

In this case, when the main chain runs,
Each rake claw of the rake is projected from the screen near the underwater floor and then rises along the screen,
Scrape up the residue. Then, it is inverted at the inversion part of the screen on the water surface to drop the residue. Further, the lever is rocked as the main chain runs, and the rake is rocked.

Further, the delay amount of the support roller with respect to the guide roller when traveling along the reversing portion is
It is more than when traveling along the straight line portion. In this case, the lever can rotate the rake clockwise with respect to the main chain by as much as the increase in the delay amount. In another back rake type automatic dust remover of the present invention, further, a pair of guide rails is arranged corresponding to the tip of the screen, and the trajectory of the guide rollers guided by the guide rails is set in the water flow direction. Bias to the downstream side.

In this case, since the delay amount of the support roller with respect to the guide roller can be reduced, more rake is returned by the reduced delay amount.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an enlarged view of essential parts of a back rake type automatic dust remover in an embodiment of the present invention. In the figure, reference numeral 51 denotes a screen formed by arranging a plurality of flat steel materials in parallel, and the screen 51 is tilted up in water to rise, and a straight line portion 51a protruding above the water surface, and the straight line portion 51a. And a reversal portion 51b extending from the angle of about 180 [.
It is composed of a residue discharge part 51c extending linearly obliquely downward from b.

The screen 51 in the direction of water flow
On the downstream side (right side in the figure), the screen 5
1, the main service chain 54 is inclined and arranged.
The main chain 54 is stretched between a first sprocket 56 rotatably arranged on the water surface and a second sprocket not shown rotatably arranged in the water. Be driven to.

Further, rake bearings 61 are formed at a plurality of set points of the main service chain 54, and the rake bearings 6 are formed.
The rake shaft 63 is rotatably supported by 1. The rake 55 is swingably supported by the rake shaft 63. The rake 55 has a plurality of rake pawls 75, and each of the rake pawls 75 is projected in a comb shape. Further, a lever 76 is fixed to the rake shaft 63, and the lever 76 eccentrically supports the guide roller 81 and the support roller 82 with respect to the rake shaft 63. A track-shaped support rail 71 for running the support roller 82 is formed on the downstream side of the screen 51 in the water flow direction. Therefore, while the rake 55 moves upward along the screen 51, the rake bearing 6
1 is made to travel together with the main chain 54 between the main body frame 84 and the support rail 71 via a main roller (not shown), and the support roller 82 is provided with the support rail 71.
Can be driven.

The support rail 71 has the screen 5
It is composed of two straight line portions that are inclined and rise along 1 and project and extend on the water surface, and two semi-circular portions that connect between the end portions of the straight line portions. Further, the lower semi-circular portion of the support rail 71 is placed at a position lower than the second sprocket. The main body frame 84 includes a straight line portion 84a corresponding to the straight line portion 51a of the screen 51, an inversion portion 51b of the screen 51, and a residue discharge portion 51c.
Corresponding to the semicircular portion 84b.

The support rail 71 has a linear portion 71a corresponding to the linear portion 51a of the screen 51.
In addition, the screen 51 includes an inversion portion 51b and a semicircular portion 71b corresponding to the residue discharge portion 51c. Therefore, when the motor is driven to drive the main chain 54, each rake claw 75 of the rake 55 penetrates the screen 51 in the vicinity of the underwater floor surface 14, and then the screen 5
Rise along 1 and scrape off the residue. Then, the screen 51 on the water surface is inverted at the inversion portion to drop the residue.

The lever 76 is swung as the main chain 54 travels, and the rake 5 is moved.
5 can also be swung. In this case, after the rake 55 is projected from the downstream side to the upstream side of the screen 51, the rake 55 is raised, so that the screen residue is not pressed or pinched by the screen 51. .

By the way, the rake 55 is the screen 5
The support roller 82 is made to travel later than the guide roller 81 when the support roller 82 is traveled along the straight portion 51a. As a result, each rake claw 75 of the rake 55
It extends in a direction perpendicular to the screen surface. The semi-circular portion is formed so that the rake claw 75 extends in a direction perpendicular to the screen surface even while the rake 55 is running along the reversing portion 51b and the residue discharge portion 51c of the screen 51. The diameter of 71b is enlarged so as to bulge upward.

In this case, since the delay amount of the support roller 82 with respect to the guide roller 81 in the semicircular portion 71b can be made larger than that of the linear portion 71a, the lever 76 increases the delay amount about the rake shaft 63. The rake 55 can be rotated clockwise as much as the minute. Therefore, since the rake claws 75 extend in a direction perpendicular to the screen surface, the screen residue discharge portion 51c of the screen 51 can sufficiently discharge the screen residue, and hair, threads, etc. can be caught between the screens 51. It can be prevented from being dragged and entangled.

Further, in the portion of the semicircular portion 71b corresponding to the tip of the screen 51, the diameter of the semicircular portion 71b is reduced to deflect the support rail 71 toward the upstream side in the water flow direction. , A pair of guide rails 95, 96 are arranged in a portion of the semicircular portion 84b corresponding to the tip of the screen 51,
A guide groove 97 is formed between them. Then, the guide rail 95 is bulged toward the guide rail 96 side, and the trajectory of the guide roller 81 is deflected to the downstream side in the water flow direction.

In this case, the delay amount of the support roller 82 with respect to the guide roller 81 can be made smaller than that of the semi-circular portion 71b, so that the lever 76 is moved to the rake shaft 6.
The rake 55 is returned counterclockwise around 3 by an amount corresponding to the decrease in the delay amount. Therefore, the rake claw 75
Are tilted rearward with respect to the tangential direction of the service chain 54.

The semicircular portion 8 of the main body frame 84
The outer side in the radial direction of 4b is open and no guide member is provided. Therefore, the rake 55 is guided only by the semicircular portion 71b of the support rail 71. Therefore, it is not necessary to increase the accuracy of the support rail 71. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

[0030]

As described above in detail, according to the present invention, in the back rake type automatic dust remover, the back rake type automatic dust remover is formed by arranging a plurality of flat steel members in parallel, and the back rake type dust remover is tilted and started up in water. And a screen consisting of a straight part protruding above the water surface, a reversing part extending from the straight part, and a residue discharge part extending obliquely downward from the reversing part, and a screen on the downstream side of the screen in the water flow direction. A main chain running along the rake, rakes fixed at a plurality of set points of the main chain, levers fixed to the rake and provided with guide rollers and support rollers, and support rails for guiding the support rollers. Have and.

In this case, the lever is rocked as the main chain travels, and the rake is rocked. And, the delay amount of the support roller with respect to the guide roller when traveling along the reversing portion,
It is more than when traveling along the straight line portion. In this case, the lever rotates the rake as much as the increase in the delay amount.

Therefore, since the rake claw extends in the direction perpendicular to the screen surface, the residue can be sufficiently discharged at the tip of the screen. In another back rake type automatic dust remover of the present invention, further, a pair of guide rails are arranged corresponding to the tip of the screen,
The trajectory of the guide roller guided by the guide rail is deflected to the downstream side in the water flow direction.

In this case, since the delay amount of the support roller with respect to the guide roller can be reduced, more rake is returned by the reduced delay amount. Therefore,
The rake claw is tilted rearward with respect to the tangential direction of the chain of affairs.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of a back rake type automatic dust remover according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a conventional back rake type automatic dust remover.

FIG. 3 is an enlarged view of a main part of a conventional back rake type automatic dust remover.

[Explanation of symbols]

 51 Screen 51a Straight part 51b Inversion part 51c Screen residue discharge part 54 Competitive chain 55 Rake 71 Support rail 76 Lever 81 Guide roller 82 Support roller

Claims (2)

[Claims] 1. (a) A straight portion formed by arranging a plurality of flat steel members in parallel, inclined and raised in water to project on a water surface, an inversion portion extending from the straight portion, and A screen consisting of a residue discharge part extending obliquely downward from the reversing part, (b) a main chain running along the screen downstream of the screen in the water flow direction, and (c) setting of the main chain. And (e) a support rail for guiding the support roller, and (f) a lever fixed to the rake and provided with a guide roller and a support roller. To increase the delay amount of the support roller with respect to the guide roller when traveling along the reversal portion more than when traveling along the straight portion. A characteristic back rake type automatic dust remover. 2. The pair of guide rails are arranged corresponding to the tip of the screen, and the trajectory of the guide rollers guided by the guide rails is deflected to the downstream side in the water flow direction. Back rake type automatic dust remover.