JP2957434B2 - Back rake type automatic dust remover - Google Patents

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, sedimentation basins, drainage stations,
2. Description of the Related Art In facilities such as an agricultural waterway and a sand basin of a water purification plant, various automatic dust removers are provided to remove scum such as dust 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 floodgate, and the residue applied to the screen is scraped by the rake. .

FIG. 2 is a longitudinal sectional view of a conventional automatic dust remover, and FIG.
It is a front view of the conventional automatic dust remover. As shown in the figure,
An automatic dust remover is provided in the water channel 11 in which the water flow in the direction of arrow A is formed. Therefore, a case pedestal 16 is provided on the floor 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
Reference numeral 8 stands up from the floor surface 14 and protrudes and extends above the water surface.

[0004] The case 18 comprises left and right side walls 5 of the water channel 11.
It has a pair of plates 18a, 18b arranged along 0, and a screen girder 19 is installed horizontally at a plurality of positions between the plates 18a, 18b.
Then, the screen 21 is attached to the screen receiving beam 19. The screen 21 is formed by arranging a plurality of bars in parallel. Each bar rises obliquely from the vicinity of the floor surface 14 of the water channel 11 and extends to protrude above the water surface. The residue that flows along the water channel 11 on sewage or the like is caught on the screen 21 and is prevented from flowing downstream.

[0005] However, when the amount of residue on the screen 21 increases, the screen 21 is clogged between the rods.
Is blocked. So, screen 2
A scooping device 23 is provided along 1. The hoisting device 23 has a hoisting chain 24 and a plurality of rakes 25 fixed to the hoisting chain 24. Then, rake guide rails 28a and 28b are attached to the plates 18a and 18b, respectively, so that the hoisting chain 24 and the rake 25 travel along a predetermined locus.
Each of the rake guide rails 28a and 28b is formed of a long member having a U-shaped cross section with an open section on the side facing each other, and is disposed in parallel with each other.

Each of the rake guide rails 28a, 28b is a semicircular curved portion a located near the floor surface 14, rises up from one end of the curved portion a along the screen 21, and protrudes above the water surface. A straight portion b extending from the other end of the curved portion a, a straight portion c protruding above the water surface and extending above the water surface, a horizontal portion d extending horizontally from one end of the straight portion b, and The rake guide rails 28 comprise a horizontal portion e extending horizontally from one end of the linear portion c.
a, 28b, the horizontal portion e, the straight portion c, the curved portion a,
A hoisting chain running path 30 extending continuously over the straight portion b and the horizontal portion d is formed.

The hoisting chain 24 is disposed along the hoisting chain traveling path 30 and stretches over a pair of hoisting sprockets 32 disposed adjacent to respective ends of the horizontal portions d and e. Is established. The hoisting sprockets 32 are connected to each other by a drive shaft 33, and the drive shaft 33 is
4 rotatably supported. Further, 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 hoisting chain 24 can be moved in the direction of arrow B in synchronization.

[0008] The rake 25 is horizontally installed between the hoisting chains 24 arranged in parallel. A plurality of the rakes 25 are provided at regular intervals in the running direction of the hoisting chain 24, and are run with the running of the hoisting chain 24. Then, when the hoisting chain 24 travels in the straight portion b in the hoisting chain travel path 30, the rake 25 rises and scrapes the residue on the screen 21.

When the hoisting chain 24 comes out of the horizontal portion d in the hoisting chain running path 30, it is inverted on the hoisting sprocket 32 and enters the horizontal portion e in the hoisting chain running path 30. The rake 25 is simultaneously inverted when the chain 24 is inverted on the sprocket 32, and the residue is dropped. A dust storage box 35 is provided below the hoisting sprocket 32, and receives and collects the dropped residue.

A front screen 37 formed by arranging a plurality of bars in parallel is disposed in front of the curved portion a. By the way, in the automatic dust remover having the above configuration, the hoisting chain 24 is connected to the hoisting chain traveling path 30.
Are driven downward in the straight portion c, inverted in the curved portion a, and run upward in the straight portion b.

In this case, when the rake 25 is raised and the frying is started on the upstream side of the screen 21, when the rake 25 bites into the screen 21, the residue is pressed down on the screen 21. It is attached and pinched. Therefore, the automatic dust remover is stopped, or the residue is dropped into the water channel 11. Therefore, there is provided an automatic dust remover in which the residue is not pressed or pinched on the screen 21.

FIG. 4 is a longitudinal sectional view of another conventional automatic dust remover. In this case, a screen 51 is formed by arranging a plurality of bars in parallel, and the screen 51 is inclined and raised in water, protrudes above the water surface, and is then inverted and extended at the top. On the downstream side of the screen 51, the chain 5
4 is stretched between the first sprocket 56 and the second sprocket 58, and is run by a motor (not shown). In addition, rake bearings 61 are formed at a plurality of set positions of the hoisting chain 54, and the rake shaft 63 is rotatably supported by the rake bearings 61. Then, a rake 55 is formed on the rake shaft 63. The rake 55 has a plurality of teeth, each of which protrudes 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 rise incline along the screen 51, and connect two straight portions protruding and extending above the water surface and connecting between the ends of the straight portions. Of semicircular parts. The semicircular portion below the main cam guide rail 71 is located at a position lower than the semicircular portion below the sub cam guide rail 72.

Accordingly, when the hoisting chain 54 is driven to travel, the plurality of teeth of the rake 55 are
Rises along the screen 51 through the screen 51 in the vicinity of the screen 51, and scrapes the residue on the screen 51. Then, the residue is inverted at the top of the screen 51 on the water surface to drop the residue. Then, the rake cam lever 76 is swung with the travel of the hoisting chain 54, and the rake 55 can be swung with respect to the hoisting chain 54 via the rake shaft 63.

In this case, the rake 55 can be raised from the downstream side of the screen 51 to the upstream side while penetrating the rake 55 to start frying, so that the 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 is not movable.
And the main cam roller and the sub-cam roller disposed at both ends thereof are guided by the main cam guide rail 71 and the sub-cam guide rail 72, respectively. I have.

Accordingly, 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 hoisting chain 54 is moved. The main cam guide rail 71 and the sub cam guide rail 72
Receives a great reaction force from As a result, the chain 54
Is difficult to travel smoothly, and the main cam roller and the sub-cam roller may bite into the main cam guide rail 71 and the sub-cam guide rail 72 to lock the hoisting chain 54. In particular, in the lower semicircular portion, not only the water pressure according to the water depth but also the dynamic pressure due to the water flow is applied to the rake 55, so that it becomes more difficult to make the rake chain 54 run smoothly.

The present invention solves the problems of the conventional automatic dust remover, so that the residue is not pressed or pinched on the screen, and the hoisting chain can run smoothly. It is an object of the present invention to provide a back rake type automatic dust remover.

[0019]

For this purpose, the back rake type automatic dust remover of the present invention is formed by arranging a plurality of rods in parallel, rises incline in water, and protrudes above the water surface. A screen that is turned over at the top and then extends along the screen, a service chain arranged along the screen on the downstream side of the screen, driven and driven, and fixed to a plurality of set locations of the service chain. With a rake. And the rake is
An erecting plate provided between the links of the supervisory chain, and a plurality of teeth protruding outward from the erecting chain from the erecting plate. In the running portion, the screen extends forward from the back of the screen, passing between the bars. Also,
A guide spacer is fixed on each tooth and protrudes outwardly of the main chain together with each tooth, and the width of the guide spacer is slightly smaller than the distance between adjacent bars.

In another back rake type automatic dust remover according to the present invention, a plurality of bars are arranged in parallel, and the bars are inclined and rise in water, protrude above the water surface, and then turn over at the top. It has a screen extending, a service chain arranged along the screen on the downstream side of the screen and driven and driven, and a rake fixed to a plurality of set points of the service chain.

The rake includes an erection plate erected between the links of the main chain, and a plurality of teeth protruding from the erection plate toward the outside of the main chain. In a portion where the supervisory chain runs along the back surface of the screen, it extends forward from the back surface of the screen, passing between the bars. A roller is rotatably supported between the teeth, and the roller prevents deformation of the bar.

[0022]

According to the present invention, as described above, the back rake type automatic dust remover is formed by arranging a plurality of rods in parallel, rises in the water inclining, and after projecting above the water surface. A screen extending inverting at the top, a main chain arranged along the screen on the downstream side of the screen and driven and driven, and a rake fixed to a plurality of set points of the main chain; Having. The rake includes an erection plate erected between links of the main chain, and a plurality of teeth protruding from the erection plate toward the outside of the main chain. At a portion running along the back surface of the screen, it extends forward from the back surface of the screen, passing between the bars.

A guide spacer projecting outwardly from the main chain together with each tooth is fixed on each tooth, and the width of the guide spacer is slightly smaller than the distance between adjacent bars. Be narrowed. Therefore, when the main chain is driven and driven, the teeth of the rake penetrate the screen and rise along the screen in the vicinity of the underwater floor surface to scoop up the residue on the screen. Then, the residue is turned over by turning over at the top of the screen above the water surface.

When the teeth of the rake rise between the bars of the screen, the guide spacers also rise between the bars.

Another back rake type automatic dust remover of the present invention is formed by arranging a plurality of bars in parallel, rises up in the water inclining, and protrudes above the water surface and then reverses at the top. It has a screen extending, a service chain arranged along the screen on the downstream side of the screen and driven and driven, and a rake fixed to a plurality of set points of the service chain. The rake includes an erection plate erected between links of the main chain, and a plurality of teeth protruding from the erection plate toward the outside of the main chain. At a portion running along the back surface of the screen, it extends forward from the back surface of the screen, passing between the bars. A roller is rotatably supported between the teeth, and the roller prevents deformation of the bar. In this case, as the teeth of the rake rise between the bars of the screen, the rollers roll along the end surfaces of the bars.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a longitudinal 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 the embodiment of the present invention, FIG. 6 is a view taken along the line XX of FIG.
FIG. 7 is a view taken along the line YY in FIG. 6.

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

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

However, if the amount of the residue on the screen 51 increases, the screen 51 is clogged between the rods 52 and closed. Therefore, a scooping device 53 is provided along the screen 51. The hoisting device 53,
It has a pair of main chains 54 and a plurality of rakes 55 fixed to the main chains 54. Each competent chain 5
4 is stretched between a first sprocket 56 provided on the water surface and a second sprocket 58 provided on the water. Chain guides 59 and 60 are formed on the opposing surfaces of the plate 48a along the main chain 54, and the main chain 54 is connected to the chain guide 59.
It is run along. The chain guides 59, 60
Are arranged along the trajectory of the main chain 54 on the underwater part and at the back of the screen 51 on the water surface, and guide the main chain 54.

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

The 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 chains 54 can be driven in the direction of arrow C in synchronization with each other. On the other hand, the rakes 55 are disposed between the respective supervisory chains 54 disposed in parallel. A plurality of the rakes 55 are arranged at regular intervals in the running direction of the main chain 54 and run along with the running of the main chain 54.

Here, the supervisory chain 54 will be described. Each of the supervisory chains 54 is formed by alternately connecting a pair of outer links 82 and a pair of inner links 83 with pins 81, and a roller 84 is disposed between the inner links 83. Is rotatably supported with respect to. The roller 84 is connected to the chain guide 59.
Rolls in a state of contact with the rail 59a fixed to the rail.
And, at a plurality of places where the main chain 54 is set, protrusions 82a are formed on the outer link 82,
The rake 55 is provided between the protruding portions 82a of the respective main chains 54 facing each other.

The rake 55 has a bridge plate 86 having both ends fixed to the projections 82a, and a plurality of teeth 55a protruding from the bridge plate 86 toward the outside of the main chain 54.
The rear ends of the teeth 55a are fixed to the bridge plate 86. Therefore, in a portion where the main chain 54 runs along the back surface of the screen 51, the teeth 55a pass through the space between the bars 52 from the back surface of the screen 51 and move forward (leftward in FIG. 1 and upward in FIG. 6). ).

The residue flowing 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 57 is driven to drive the main chain 54, the rake 55 is raised along the screen 51. Therefore, the residue is scraped up by the teeth 55 a of the rake 55, supplied to the conveyor 90 via the chute 91, and discharged by the conveyor 90.

In this case, when the main chain 54 is driven and driven, the teeth 55a of the rake 55 penetrate the screen 51 near the underwater floor surface and rise along the screen 51. It is possible to make the depth of the scooping start position 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 scoop up the residue below the installation level of the screen 51.

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

By the way, each bar 5 of the screen 51
The rake 55 has a lower end connected to the case base 16 and an upper end connected to the chute 91.
In the portion through which the teeth 55a pass, there is no connection between the rods 52. Therefore, for example, when it is necessary to dispose an automatic dust remover in the deep water channel 11, if the length of each bar 52 is long, the strength of the screen 51 is reduced.

Then, the guide spacer 93 is fixed on the teeth 55a, and is protruded outward of the main chain 54 together with the teeth 55a. The guide spacer 93
Is formed of a material having a sliding property with respect to the screen 51, and has a width slightly smaller than a distance between the adjacent rods 52. In this case, each tooth 55
Since the guide spacer 93 also rises between the bars 52 while a is raised between the bars 52, the bars 52 are regulated in the width direction of the water channel 11. Therefore, it is possible to prevent the rod 52 from bending or deforming 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 superimposed on each other.

A shaft 94 is provided so as to penetrate the teeth 55a, and nuts 95 are provided at both ends of the shaft 94.
Are screwed together. Further, a roller 97 is rotatably supported on the shaft 94 between the adjacent rods 52. When sewage or the like flows through the water channel 11, a water pressure difference occurs before and after the screen 51, and the water pressure difference causes the screen 51 to deform downstream. In this case, when the teeth 55a rise between the bars 52 of the screen 51, the rollers 97 roll along the end surfaces of the bars 52, so that the bars 52 are regulated in the flow direction of the water channel 11. .

Accordingly, it is possible to prevent the screen 51 from being deformed downstream. In this case, the pitch of the bar 52 is set in accordance with the water pressure difference. In addition,
The present invention is not limited to the above-described embodiments, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0041]

As described above in detail, according to the present invention, a back rake type automatic dust remover is formed by arranging a plurality of rods in parallel, and rises up in the water under an inclination. A screen protruding above the water surface and extending at the top in an inverted manner, a main chain arranged along the screen on the downstream side of the screen and driven to run, and a plurality of set places of the main chain And a rake fixed to the rake. The rake includes an erection plate erected between links of the main chain, and a plurality of teeth protruding from the erection plate toward the outside of the main chain. At a portion running along the back surface of the screen, it extends forward from the back surface of the screen, passing between the bars.

A guide spacer projecting outwardly from the main chain together with each tooth is fixed on each tooth, and the width of the guide spacer is slightly smaller than the distance between adjacent bars. Be narrowed. In this case, when the main chain is driven to run, the teeth of the rake penetrate the screen near the underwater floor surface and rise along the screen. It can be almost 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 scoop up the residue below the screen installation level.

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

Since the guide spacers projecting outward from the main chain together with the respective teeth are fixed on the respective teeth, the rod is bent or deformed in the width direction of the water channel. Can be prevented.

Another back rake type automatic dust remover according to the present invention is formed by arranging a plurality of bars in parallel, rises incline in water, protrudes above the water surface, and then reverses at the top. It has a screen extending, a service chain arranged along the screen on the downstream side of the screen and driven and driven, and a rake fixed to a plurality of set points of the service chain. The rake includes an erection plate erected between links of the main chain, and a plurality of teeth protruding from the erection plate toward the outside of the main chain. At a portion running along the back surface of the screen, it extends forward from the back surface of the screen, passing between the bars. A roller is rotatably supported between the teeth, and the roller prevents deformation of the bar. In this case, it is possible to prevent the screen from being deformed downstream.

[Brief description of the drawings]

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

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

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

FIG. 4 is a longitudinal 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 taken along the line XX of FIG. 1;

FIG. 7 is a view taken along the line YY of FIG. 6;

[Explanation of symbols]

 51 Screen 52 Bar 54 Main chain 55 Rake 55a Teeth 86 Bridge plate 93 Guide spacer

Claims (2)

(57) [Claims] 1. (a) It is formed by arranging a plurality of bars in parallel, rises incline in water,
A screen that protrudes above the water surface and then extends at the top in an inverted manner; (b) a main chain arranged along the screen at a downstream side of the screen and driven to run; and (c) the main chain. (D) the rake is installed between the links of the supervisory chain, and the rake is directed from the erection plate to the outside of the supervisory chain. comprising a plurality of teeth protruding, (e) each of said teeth in a portion where the competent chain travels along the back of the screen, extending forwardly exits between each bar from the back of the screen, (f) On each said tooth, along with each tooth, outside the main chain
It is the guide spacer projecting toward the fixed, (g) the width of the guide spacer distance between each adjacent bars
Back rake type automatic dust remover which slightly narrowed characterized Rukoto than away. 2. (a) Arranging a plurality of bars in parallel
Formed in the water, rising up in the water,
A screen that protrudes above the water surface and then extends at the top, turning over
And down, along the screen at the downstream side of (b) the screen
Administrative chain that is arranged, driven and driven
When it is fixed to a plurality of positions which are set in (c) main Tsutomu chain
Which has a rake was, (d) the rake is extended between the link of the competent chain
Erection plate, and the outside of the main chain from the erection plate
A plurality of teeth projecting toward the screen, and (e) each tooth is such that the main chain is behind the screen.
The part running along the back of the screen
Extending forwardly exits between each bar from the roller is rotatably supported between (f) the respective tooth, 該Ro
A roller-type automatic dust remover, wherein the roller prevents deformation of the bar.