JPH08232243A - Back-rake-type automatic dust collector - Google Patents

Abstract

PURPOSE: To enable a raking chain to travel smoothly. CONSTITUTION: This back-rake-type automatic dust collector has a screen 51 formed by the arranging of plural rods in parallel, standing up in water while being inclined, and inverted at its top and extended after being projected above the surface of the water; a main chain 54 placed along the screen 51 on the downstream side of the screen 51 and driven to travel; and rakes secured to plural preset portions of the main chain 54. Each rake has a suspension plate suspended between the links of the main chain 54 and plural teeth 55a projected from the suspension plate to the outside of the main chain 54, each of the teeth 55a extending forward from the back of the screen 51 through the spaces between the rods, at a portion where the main chain 54 travels along the back of the screen 51.

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 (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, various automatic dust removers are installed to remove dust in water and contaminants in water. 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. .

FIG. 2 is a vertical sectional view of a conventional automatic dust remover, and FIG.
FIG. 4 is a front view of a conventional automatic dust remover. As shown in the figure,
An automatic dust remover is arranged in the water channel 11 in which a water flow in the direction of arrow A is formed. Therefore, the case pedestal 16 is disposed on the floor surface 14 of the water channel 11, and the lower end of the case 18 of the automatic dust remover is fixed on the case pedestal 16. Case 1
8 is inclined and rises from the floor surface 14, and projects and extends above the water surface.

The case 18 is formed by the left and right side walls 5 of the water channel 11.
It has a pair of plates 18a and 18b arranged along 0, and a screen support girder 19 is horizontally installed at a plurality of positions between the plates 18a and 18b.
Then, a screen 21 is attached to the screen receiving girder 19. The screen 21 is formed by arranging a plurality of bar members in parallel, and each bar member is inclined and rises from the vicinity of the floor surface 14 of the water channel 11, and protrudes and extends above the water surface. The residue that flows through the water channel 11 by riding on dirty water or the like is caught on the screen 21 and is prevented from flowing to the downstream side.

However, when the amount of residue on the screen 21 increases, the screen 21 is clogged between the bars.
Will be blocked. So screen 2
A scraping device 23 is arranged along the line 1. The raking device 23 has a raking chain 24 and a plurality of rakes 25 fixed to the raking chain 24. Then, rake guide rails 28a and 28b are attached to the plates 18a and 18b in order to cause the scraping chain 24 and the rake 25 to travel on a predetermined locus.
Each of the rake guide rails 28a, 28b is formed of an elongated member having an open U-shaped cross section on the side facing each other, and is arranged in parallel with each other.

Each of the rake guide rails 28a, 28b is a semi-circular curved portion a located in the vicinity of the floor surface 14, is inclined from one end of the curved portion a and rises along the screen 21, and protrudes above the water surface. A straight portion b extending in a vertical direction, a straight portion c that is inclined and rises from the other end of the curved portion a and extends so as to project on the water surface, a horizontal portion d that horizontally extends from one end of the straight portion b, and The rake guide rail 28 includes a horizontal portion e horizontally extending from one end of the straight portion c.
In the a and 28b, the horizontal portion e, the straight portion c, the curved portion a,
A scraping chain traveling path 30 is formed which continuously extends over the straight line portion b and the horizontal portion d.

The scraping chain 24 is arranged along the scraping chain running path 30 and is stretched on a pair of scraping sprockets 32 which are arranged adjacent to each end of the horizontal portions d and e. Set up. The scraping sprockets 32 are connected to each other by a drive shaft 33, and the drive shaft 33 connects the bearings 3 to each other.
It is rotatably supported by 4. Also, the drive shaft 3
A transmission sprocket 36 is fixed to one end of the transmission 3, and the transmission sprocket 36 is connected to a drive source via a chain (not shown). Therefore, by driving the drive source, the scraping chain 24 can be synchronized and run in the direction of the arrow B.

The rake 25 is horizontally installed between the scraping chains 24 arranged in parallel. A plurality of the rakes 25 are arranged at regular intervals in the traveling direction of the scraping chain 24, and are run as the scraping chain 24 travels. Then, when the scraping chain 24 travels in the straight line portion b in the scraping chain travel path 30, the rake 25 rises to scrape up the residue on the screen 21.

When the lifting chain 24 comes out of the horizontal portion d of the lifting chain traveling path 30, it is turned over on the lifting sprocket 32 and enters the horizontal portion e of the lifting chain traveling path 30. The rake 25 is reversed at the same time when the scraping chain 24 is reversed on the scraping sprocket 32, and the screen residue is dropped. A dust storage box 35 is disposed below the scraping sprocket 32, and receives and collects the dropped residue.

A front screen 37 formed by arranging a plurality of bars in parallel is arranged in front of the curved portion a. By the way, in the automatic dust remover of the said structure, the scraping chain 24 is the scraping chain running path 30.
In the straight line portion c, the vehicle is made to travel downward, in the curved portion a it is turned over, and in the straight line portion b, it is made to run upward.

In this case, when the rake 25 is raised on the upstream side of the screen 21 to start the scooping, when the rake 25 is bitten into the screen 21, the screen residue is pressed against the screen 21. It is attached or pinched. Therefore, the automatic dust remover is stopped, and the residue falls into the water channel 11. Therefore, there is provided an automatic dust remover in which the screen residue is not pressed or pinched by the screen 21.

FIG. 4 is a vertical sectional view of another conventional automatic dust remover. In this case, a screen 51 is formed by arranging a plurality of rods in parallel, the screen 51 is tilted up in water, is projected on the water surface, and is then inverted and extended at the top. A raking chain 5 is provided along the screen 51 on the downstream side of the screen 51.
4 is stretched between the first sprocket 56 and the second sprocket 58 and driven by a motor (not shown). In addition, rake bearings 61 are formed at a plurality of set points of the scraping chain 54, and a rake shaft 63 is rotatably supported by the rake bearings 61. Then, the rake 55 is formed on the rake shaft 63. The rake 55 has a plurality of teeth, and each tooth is projected in a comb shape.

A rake cam lever 76 is fixed to the rake shaft 63, and eccentrically supports a main cam roller and a sub cam roller (not shown) with respect to the rake shaft 63. A main cam guide rail 71 is formed corresponding to the main cam roller, and a sub cam guide rail 72 is formed corresponding to the sub cam roller. The main cam guide rail 71 and the sub cam guide rail 72 connect between two straight line portions that are inclined and rise along the screen 51 and project and extend on the water surface, and the end portions of the straight line portions. It consists of individual semi-circular parts. Further, the lower semi-circular portion of the main cam guide rail 71 is placed at a lower position than the lower semi-circular portion of the sub cam guide rail 72.

Therefore, when the scraping chain 54 is driven to run, a plurality of teeth of the rake 55 will cause the plurality of teeth of the rake 55 to fall on the underwater floor surface 14.
In the vicinity of, the screen 51 is pierced and rises along the screen 51 to scoop up the residue on the screen 51. After that, it is turned over at the top of the screen 51 on the water surface and the residue is dropped. Then, the rake cam lever 76 is swung as the scraping chain 54 travels, and the rake 55 can be swung with respect to the scraping chain 54 via the rake shaft 63.

In this case, since it is possible to raise the rake 55 from the downstream side of the screen 51 to the upstream side while penetrating the rake 55, the screen residue is not pressed or pinched by the screen 51.

[0016]

However, in the above-mentioned conventional automatic dust remover, the rake cam lever 76 has three points.
It is supported by a point and the center thereof is fixed to the scraping chain 54, and the main cam roller and the sub cam rollers arranged at both ends are guided by the main cam guide rail 71 and the sub cam guide rail 72, respectively. There is.

Therefore, the main cam roller and the sub cam roller move along the main cam guide rail 71 and the sub cam guide rail 72, respectively, as the scraping chain 54 is moved. In the main cam guide rail 71 and the sub cam guide rail 72
Receives a large reaction force from. As a result, the lifting chain 54
It may be difficult for the main cam roller and the sub cam roller to bite into the main cam guide rail 71 and the sub cam guide rail 72, and the lifting chain 54 may be locked. Particularly, in the lower semicircular portion, not only the water pressure according to the water depth is applied to the rake 55, but also the dynamic pressure due to the water flow is applied, so that it becomes more difficult to smoothly run the scraping chain 54.

The present invention solves the above-mentioned problems of the conventional automatic dust remover so that the screen residue is not pressed or pinched by the screen and the scraping chain can be smoothly run. An object is to provide a back rake type automatic dust remover.

[0019]

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 rods in parallel, rises in the water with an inclination, and projects onto the water surface. After that, the screen that is inverted and extends at the top, the main chain that is arranged along the screen on the downstream side of the screen and is driven to run, and fixed to a plurality of set points of the main chain With rake.

The rake comprises a erection plate erected between the links of the service chain and a plurality of teeth protruding from the erection plate toward the outside of the service chain, each of the teeth being In the portion where the main chain runs along the back surface of the screen, it extends forward from the back surface of the screen through the bars. In another back rake type automatic dust remover of the present invention, further, a guide spacer protruding toward the outside of the main chain together with each tooth is fixed on each tooth, and the width of the guide spacer is It is slightly narrower than the distance between adjacent bars.

In still another back rake type automatic dust remover of the present invention, a roller is rotatably supported between the teeth, and the surface of the roller is brought into contact with the end surface of each bar.

[0022]

According to the present invention, as described above, in the back rake type automatic dust remover, the back rake type automatic dust remover is formed by arranging a plurality of rods in parallel and rises in water with an inclination.
A screen that inverts and extends at the top after protruding above the water surface, a main chain that is arranged along the screen on the downstream side of the screen and is driven to run, and a plurality of set points of the main chain And a rake fixed to.

The rake comprises a erection plate erected between the links of the service chain and a plurality of teeth protruding from the erection plate toward the outside of the service chain. In the portion where the main chain runs along the back surface of the screen, it extends forward from the back surface of the screen through the bars. Therefore, when the main service chain is driven to run, the teeth of the rake penetrate through the screen near the floor surface in the water and ascend along the screen to scoop up the residue on the screen. Then, turn over the screen on the water surface and drop the residue.

In another back rake type automatic dust remover of the present invention, a guide spacer protruding toward the outside of the service chain together with each tooth is fixed on each tooth, and the guide spacer The width is slightly narrower than the distance between adjacent bars. In this case, when the teeth of the rake rise between the rods of the screen, the guide spacer also rises between the rods.

In still another back rake type automatic dust remover of the present invention, a roller is rotatably supported between the teeth, and the surface of the roller is brought into contact with the end surface of each bar. In this case, when the teeth of the rake rise between the bars of the screen, the rollers roll along the end faces of the bars.

[0026]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical sectional view of an automatic dust remover according to an embodiment of the present invention, FIG. 5 is a front view of the automatic dust remover according to an embodiment of the present invention, FIG. 6 is a view taken along the line XX in FIG.
FIG. 7 is a view showing an arrow Y-Y in FIG. 6.

As shown in the figure, an automatic dust remover is arranged in the water channel 11 in which a water flow in the direction of arrow A is formed. Therefore, the case pedestal 16 is disposed on the floor surface 14 of the water channel 11, and the lower end of the case 48 of the automatic dust remover is fixed on the case pedestal 16. The case 48 is inclined and rises from the floor surface 14, and projects and extends above the water surface. The case 48 includes a pair of plates 48a arranged along the left and right side walls 50 of the water channel 11,
a is fixed to the side wall 50.

A screen 51 is arranged on the upstream side of the case 48. The screen 51 is shaped steel (75
[Mm] × 9 [mm]) is formed by arranging a plurality of rod members 52 in parallel, one end of each rod member 52 is fixed to the case pedestal 16, and the rod 52 rises in an inclined manner from the case pedestal 16. , Projecting above the water surface and then inverting and extending at the top. The screen residue which flows through the water channel 11 by riding on dirty water or the like is caught on the screen 51 and is prevented from flowing to the downstream side. The screen 51 is provided over almost the entire cross section of the water channel 11, and the side wall 5 of the water channel 11 is provided.
A baffle plate (not shown) is arranged between 0 and 0.

However, when the amount of residue on the screen 51 increases, the rods 52 are clogged and the screen 51 is closed. Therefore, a scraping device 53 is arranged along the screen 51. The raking device 53 is
It has a pair of master chains 54 and a plurality of rakes 55 fixed to the master chains 54. Each competent chain 5
4 is stretched between a first sprocket 56 disposed on the water surface and a second sprocket 58 disposed underwater. Chain guides 59 and 60 are formed on the surfaces of the plate 48a facing each other along the main chain 54, and the main chain 54 has the chain guide 59.
Be driven along. The chain guide 59, 60
Are arranged along the track of the service chain 54 on the underwater portion and on the back surface of the screen 51 on the water surface, and guide the service chain 54.

In FIG. 1, the chain guide 59 is not formed on the peripheral portion of the second sprocket 58. However, if the second sprocket 58 is not used, as shown in FIG. Chain guides 59 and 60 are also formed in a portion corresponding to 58. A take-up sprocket 88 is disposed downstream of the second sprocket 58 in the traveling direction of the main chain 54, and a pull-up device 89 connected to the take-up sprocket 88 applies a pulling force to the main chain 54. It can be adjusted. The tensile force of the main service chain 54 can be adjusted by changing the position of the first sprocket 56.

The respective first sprockets 56 are connected to each other by a drive shaft 56a, and the drive shaft 56a is connected to a motor 57. Therefore, by driving the motor 57, the main duty chains 54 can be synchronized and run in the direction of arrow C. On the other hand, the rake 55 is arranged between the main service chains 54 arranged in parallel. A plurality of the rakes 55 are arranged at regular intervals in the traveling direction of the main service chain 54, and are driven as the main service chain 54 travels.

Here, the main duty chain 54 will be described. Each main chain 54 is formed by alternately connecting a pair of outer links 82 and a pair of inner links 83 with pins 81, and rollers 84 are arranged between the inner links 83, and the pins 81 are connected to each other. It is rotatably supported with respect to. The roller 84 is connected to the chain guide 59.
It rolls while abutting on the rail 59a fixed to the.
Then, at a plurality of set points of the main duty chain 54, protrusions 82a are formed on the outer links 82,
The rake 55 is installed between the projecting portions 82a of the main service chains 54 that face each other.

The rake 55 has a erection plate 86 whose both ends are fixed to the protrusions 82a, and a plurality of teeth 55a protruding from the erection plate 86 toward the outside of the service chain 54.
The rear ends of the teeth 55a are fixed to the erection plate 86. Therefore, in the portion where the main service chain 54 runs along the back surface of the screen 51, the teeth 55a pass through the bars 52 from the back surface of the screen 51 and move forward (to the left in FIG. 1 and upward in FIG. 6). ) Will be extended to.

The screen residue, which flows along with the sewage and the like in the water channel 11, is blocked by the screen 51 and adheres to the surface of the screen 51. When the motor chain 57 is driven by driving the motor 57, the rake is generated. 55 is raised along the screen 51. Therefore, the teeth 55 a of the rake 55 scoop up the residue, supply it to the conveyor 90 via the chute 91, and discharge it by the conveyor 90.

In this case, when the main duty chain 54 is driven to run, the teeth 55a of the rake 55 penetrate the screen 51 in the vicinity of the underwater floor and ascend along the screen 51. The depth of the scratch start position can be made substantially equal to the depth of the floor surface. As a result, even if the water depth of the water channel is small, it is possible to sufficiently scrape the residue below the installation level of the screen 51.

Further, since it is possible to raise the rake 55 from the downstream side of the screen 51 to the upstream side while penetrating the rake 55, the screen residue can be prevented from being pressed or pinched by the screen 51. Furthermore, since a large reaction force is not applied to the main duty chain 54 from the outside, the main duty chain 54 can smoothly run.

By the way, each bar 5 of the screen 51 is
2, the lower end is connected to the case pedestal 16 and the upper end is connected to each other by the chute 91.
There is nothing for connecting the rod members 52 in the portion where the tooth 55a of the above passes. Therefore, for example, when it is necessary to dispose the automatic dust remover in the water channel 11 having a deep water depth, the strength of the screen 51 decreases as the length of each rod 52 increases.

Therefore, the guide spacer 93 is fixed on the tooth 55a, and is projected toward the outside of the main service chain 54 together with the tooth 55a. The guide spacer 93
Is made of a material having a sliding property with respect to the screen 51, and its width is made slightly narrower than the distance between the adjacent bar members 52. In this case, each tooth 55
Since the guide spacer 93 also rises between the rods 52 while a is raised between the rods 52, the rods 52 are restricted in the width direction of the water channel 11. Therefore, it is possible to prevent the bar member 52 from being curved or deformed in the width direction of the water channel 11. The guide spacer 9
3 is composed of an upper plate 93a and a lower plate 93b which are stacked on each other.

A shaft 94 is provided so as to pass through the teeth 55a, and nuts 95 are provided at both ends of the shaft 94.
Are screwed together. By fixing the shaft 94 and each bar member 52, it is possible to prevent each bar member 52 from being curved or deformed in the width direction of the water channel 11. Further, a roller 97 is rotatably supported by the shaft 94 between the adjacent bar members 52. When sewage or the like flows in the water passage 11, a water pressure difference is generated before and after the screen 51, and the water pressure difference causes the screen 51 to deform downstream. in this case,
Since the surface of the roller 97 and the end surface of each bar member 52 are in contact with each other, the roller 97 contacts the end surface of each bar member 52 while the teeth 55a move up between the bar members 52 of the screen 51. Since it rolls along, the bar 52 is restricted in the flow direction of the water channel 11.

Therefore, it is possible to prevent the screen 51 from being deformed downstream. In this case, the pitch of the rods 52 is set according to the water pressure difference. In addition,
The present invention is not limited to the above-described embodiments, but 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.

[0041]

As described in detail above, 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 rods in parallel and rises in the water while inclining and rising. A screen that inverts and extends at the top after protruding upward, a main chain that is arranged along the screen on the downstream side of the screen and is driven to run, and at a plurality of set points of the main chain. With a fixed rake.

The rake is provided with a erection plate erected between the links of the service chain and a plurality of teeth protruding from the erection plate toward the outside of the service chain. In the portion where the main chain runs along the back surface of the screen, it extends forward from the back surface of the screen through the bars. In this case, when the main service chain is driven to run, the teeth of the rake penetrate the screen near the floor surface in the water and ascend along the screen. It can be approximately equal to the depth of the surface. As a result, even if the water depth of the water channel is small, it is possible to sufficiently scrape the residue below the screen installation level.

Further, since it is possible to raise the rake from the downstream side of the screen to the upstream side while penetrating the rake, scooping can be started, so that the screen residue is not pressed or pinched by the screen. Furthermore, since a large reaction force is not applied to the main duty chain from the outside, the main duty chain can be smoothly run.

In another back rake type automatic dust remover of the present invention, a guide spacer protruding toward the outside of the service chain together with each tooth is fixed on each of the teeth. The width is slightly narrower than the distance between adjacent bars. Therefore, it is possible to prevent the rod from being curved or deformed in the width direction of the water channel.

In still another back rake type automatic dust remover of the present invention, a roller is rotatably supported between the teeth, and the surface of the roller is brought into contact with the end surface of each bar. Therefore, the screen can be prevented from being deformed downstream.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an automatic dust remover according to an embodiment of the present invention.

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

FIG. 3 is a front view of a conventional automatic dust remover.

FIG. 4 is a vertical sectional view of another conventional automatic dust remover.

FIG. 5 is a front view of the automatic dust remover according to the embodiment of the present invention.

FIG. 6 is a view showing an arrow XX in FIG.

FIG. 7 is a view showing an arrow YY of FIG.

[Explanation of symbols]

 51 Screen 52 Bar Material 54 Competitive Chain 55 Rake 55a Teeth 86 Construction Plate 93 Guide Spacer

Claims (3)

[Claims] 1. (a) It is formed by arranging a plurality of rods in parallel and rises in water with an inclination,
A screen that inverts and extends at the top after projecting above the water surface; (b) a main chain that is arranged along the screen on the downstream side of the screen and is driven to run; and (c) the main chain. And (d) the rake is installed between the links of the competent chain.
And a plurality of teeth protruding from the erection plate toward the outside of the main duty chain, (e) each tooth is a portion where the main duty chain runs along the back surface of the screen,
A back rake type automatic dust remover, characterized in that it extends forward from the back surface of the screen through the bars. 2. A guide spacer protruding toward the outside of the main chain together with each tooth is fixed on each of the teeth, and the width of the guide spacer is set to the width of each adjacent rod member. The back rake type automatic dust remover according to claim 1, wherein the back rake type automatic dust remover is slightly narrower than the distance therebetween. 3. The back rake type automatic dust remover according to claim 1, wherein a roller is rotatably supported between the teeth, and a surface of the roller is in contact with an end surface of each bar.