JPH09813A - Sludge scraper - Google Patents

Abstract

(57) [PROBLEMS] To provide an inexpensive sludge attracting device, which is structurally very simple. SOLUTION: It is possible to switch between a crawling posture in which the sludge can run back and forth in parallel with a bottom surface where sludge is accumulated and can sludge in one direction, and a return posture in which sludge can be avoided and pass over the sludge. In a sludge scraping device including a scraper 21 that can move and a driving device that reciprocates the scraper 21, the scraper 21 takes a scraping posture by its own weight with a fulcrum 19 as a boundary and scratches against an excessive load. It can be temporarily avoided in the range of returning to the approaching posture, while it can be switched to the returning posture by rotating by the facing surface and the center of gravity exceeding the fulcrum, and can be switched from the returning posture to the approaching posture by the facing surface. ing. Further, in the above-described configuration, the scraper 21 has an internal space formed therein, in which moving weights 32 and 35 such as water or balls that move the center of gravity in the approaching position and the returning position are provided. Further, in the same configuration, a guide rail 7 is provided on the bottom surface, and the guide rail 7 is a single track.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge scraping apparatus for scraping and removing sludge accumulated on the bottom surface of a first settling tank or a final settling tank, and more particularly to a simple sludge drawing apparatus.

[0002]

2. Description of the Related Art In a first or final sedimentation basin, a large amount of sediment accumulates on the bottom of the pond. Therefore, a sludge scraping device is constructed to scrape and remove these sludges. The sludge scraping device is provided with a reciprocating carrier, and a blade-like scraper is attached to the carrier so as to be vertical when scraping and horizontal when returning. This scraper is generally configured to be switched before driving the carrier.

[0003]

By the way, the conventional sludge attracting device is generally provided with a link interlocking mechanism for switching the scraper between the scraping position and the returning position. It was complicated. The present invention has been made to solve the above problems, and an object of the present invention is to provide a sludge attracting device which is structurally very simple and inexpensive.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 is capable of traveling back and forth parallel to the bottom surface of the sludge, and is capable of moving the sludge in one direction. In a sludge scraping device comprising a posture and a scraper that can be switched to a return posture that can avoid the sludge and pass through the sludge, and a drive device that reciprocates the scraper, the scraper has a fulcrum as a boundary. It becomes a pulling posture due to its own weight, and it is possible to temporarily avoid an excessive load in the range returning to the pulling posture, while it is switched to the return posture by rotating by the facing surface and the center of gravity exceeding the fulcrum.
It is possible to switch from the returning posture to the approaching posture by the surface which faces.

According to a second aspect of the invention, in the first aspect, the scraper has an internal space formed therein, and a moving weight such as water or a ball for moving the center of gravity between the scraping position and the returning position is provided therein. There is.

[0006] The invention described in claim 3 is claim 1 or 2.
In, the bottom surface is provided with a guide rail, and the guide rail is a single track.

The invention according to claim 4 is capable of traveling back and forth in parallel with the bottom surface of the sludge, and is capable of running in one direction and pulling the sludge in one direction, and avoiding the sludge and passing over the sludge. In a sludge attracting device including a scraper that can be switched to a possible return posture and a drive device that reciprocates the scraper, the drive device uses a combination of a submersible motor and a speed reducer as a drive source. Characterize.

According to a fifth aspect of the present invention, in the fourth aspect, a guide rail is provided on the bottom surface, and the guide rails are spaced apart from each other in the left and right directions.

According to a sixth aspect of the present invention, in the fourth aspect, a guide rail is provided on the bottom surface, and the guide rail is a single track.

According to a seventh aspect of the present invention, a rotary rake is constructed in a sedimentation basin represented by a circular shape or a square shape, and a scraper is rotatably provided on the water surface. In the sludge attracting device where the scum of is discharged by the scum removing means,
The rake and scraper can be simultaneously driven by an underwater motor with a speed reducer.

According to an eighth aspect of the present invention, in the seventh aspect, an underwater motor with a speed reducer is mounted at the center of the rake, and the output shaft from the speed reducer is on the fixed side. It is rotatable with a rake and scraper.

According to a ninth aspect of the present invention, in the seventh aspect, the submersible motor with a speed reducer is mounted on the outer peripheral side end of the rake, and the output shaft or the speed reducer side of the rake can be rotationally driven with the pond inner peripheral side as the receiving side. Has been done.

According to a tenth aspect of the present invention, in the ninth aspect, the receiving side is a chain and the rotation driving side is a sprocket.

According to an eleventh aspect of the present invention, in the ninth aspect, the rotational driving side is a rubber wheel, and the wheel is rotationally driven while being in contact with the receiving side.

The invention as defined in claim 12 is from claim 7 to claim 1.
In any one of 1 to 1, the conductive cord from the submersible motor is guided to the outside of the pond via the rotary joint.

The invention described in claim 13 is from claim 7 to claim 1.
In any of the items up to 1, the scraper is one through in the pond.

The invention described in claim 14 is from claim 9 to claim 1.
In any of the items up to 3, the rake can be tilted up and down around a horizontal shaft-shaped rotation fulcrum.

According to a fifteenth aspect of the present invention, a rotary rake is formed in the rectangular sedimentation basin, and the rake includes a long rake body and an overrake which is linearly extendable and retractable with respect to the rake body. It is configured.

According to a sixteenth aspect of the present invention, in the fifteenth aspect, the overrake is constantly urged by a spring in the inner circumferential direction of the pond.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 and 2 show an embodiment, FIG. 1 is an overall vertical cross-sectional view when a sludge attracting device according to the present invention is installed in a sedimentation basin, and FIG. 2 is a plan view thereof.

Reference numeral 1 denotes a sedimentation basin, which is rectangular in this case. As shown in FIG. 2, the sedimentation basin 1 has a long side wall 2 and end walls 3 and a bottom wall 4 orthogonal to the side wall 2. A pit 5 into which sludge is dropped is formed at an end portion of the bottom wall 4, and a pump or pipe for sucking is faced therein.

Reference numeral 7 is a guide rail, which is a single track and has a casing in section, on which a sludge attracting device advances and retreats. The apparatus includes a carrier 10 and a carrier 1
Reference numeral 0 is composed of a base plate 11 in the shape of a strip plate and oriented in an upright position, a horizontal plate 12 that horizontally extends to the left and right of the base plate 11, and side plates 13 fixed to the ends thereof. And a total of four front and rear traveling rollers 14 ...

A bent plate-shaped bracket 15 extends from the front and rear of the substrate 11 from the carrier 10, and a side roller 16 is attached to the end of the bracket 15 so as to contact the side surface of the guide rail 7. A pair of left and right shaft brackets 18 are provided on a rear portion of the carrier 10 via a pedestal plate 17, and a fixed shaft 19 is attached to the carrier 10 so as to extend to the left and right.

A scraper 21 is attached to the fixed shaft 19 via a rotary bracket 20.
Is equipped with a pair of left and right lower rollers 22 at the rear portion of the lower end, and a weight 23 is attached to the back surface of the upper portion.

The ends of wire ropes 24, which are separate from each other, are connected to the front and rear of the carrier 10. These wire ropes 24 are driven by sheaves 25 attached to the end wall 3 to provide an upper drive source (not shown). It can be wound around the drum of and fed out. On the other hand, from the inside of the pit 5, a pair of left and right stays 28 each provided with a roller 27 at the tip thereof are provided, and a pair of left and right stays 30 provided with a swash plate 29 are also provided on the return side.

In this sludge scraping device, the solid line in FIGS. 1 and 2 indicates the scraping state, and in this scraping state, the scraper 2
1 is biased clockwise by the weight 23, the scraper's own weight, and the like about the fixed shaft 19 as a fulcrum, while the lower roller 22 hits the bottom wall 4 to be in a scraping posture. The scraper 21 is vertical with the rear end of the carrier 10 and the rear bracket 15 serving as a stopper.

In this apparatus, one wire rope 24 is pulled and the other wire rope 24 is paid out so that the carrier 10 advances in the pit direction and the scraper 21
Moves in the direction of the solid arrow in a vertical scratching posture, but when the settled sludge becomes excessive due to rainfall and acts as a load, it shows a scratching function while temporarily avoiding it.

When the scraper 21 reaches the pit 5, the sludge that has been scraped is dropped into the pit 5, and then the scraper 21 hits the roller 27 and rises backward as shown by the phantom line in FIG. When the center of gravity of the weight 23 and the scraper 21 and the like exceeds the fixed shaft 19 serving as the fulcrum, the scraper 21 takes a horizontal returning posture.

When the other wire rope 24 is pulled, the carrier 10 retracts in the returning direction, and the lower roller 22 lowers while hitting the swash plate 29 at the returning end, so that the scraper 21 has a center of gravity rearward of the fixed shaft 19. Is moved back to the original scratching posture. At this time, settling pond 1
The sludge accumulated in the corner A on the inner end wall 3 side is effectively scraped when the scraper 21 rotates at the rear end in the scraping direction to bring the scraper 21 into the scraping posture.

In this embodiment, the scraper 2
The longitudinal middle portion of 1 is notched due to the presence of the guide rail 7, and therefore the scraper 21
Although the number is one, the left and right sides may be configured separately. Further, in the above-mentioned embodiment, the guide rail 7 is of a single track type, but it may be of a plurality of types such as a left and right pair.
Further, the guide rail 7 may be omitted, and the roller 14 may travel directly on the bottom wall 4.

Further, in the above embodiment, the traveling rollers 14 are provided at the front and rear, but one of them may be omitted. Of course, the lower roller 22 can be omitted. Further, although the carrier 10 is provided in the above-described embodiment, the carrier 10 may be simplified or omitted by connecting the wire rope 24 to a small piece provided on the outer circumference of the shaft of the traveling roller 14.

In the embodiment shown in FIG. 3, the scraper 21 has a hollow shape, and water (other liquid may be used) 32 is put therein, and this functions as a moving weight. At the upper and lower ends, spherical or cylindrical water tanks 33 are formed so that the water 32 is alternately filled. That is, the solid line shows the approaching posture, and the phantom line shows the returning posture. In the solid line, since there is water in the lower water tank 33 and the scraper 21, the approaching posture is stabilized by the clockwise rotation bias, and further, As the scraper 21 is lifted on the pit side as described above, the water 32 inside moves into the water tank 33 on the upper end side to move the center of gravity, and as a result, the return posture can be obtained reliably and stably.

In the embodiment shown in FIG. 4, the scraper 21 is hollow and a plurality of or single balls 35 ...
Is put in to function as a moving weight.

In the embodiment shown in FIG. 5, a casing-shaped carrier 10 can be moved back and forth by a single traveling roller 14 on a plate-shaped or casing-shaped single-track guide rail 7. Advancing and retreating is done by the wire rope 24, and the traveling roller 1
The rotating shaft 37 is passed through the roller 4 and the traveling roller 14,
The coaxial shaft 37 has a moving shaft 39 provided with balls 38 at the front and rear.
And a roller shaft 40 outside thereof. Stabilizing rollers 41 are provided respectively in front of and behind the roller shaft 40, and a pair of front and rear scrapers 21 are attached via the upper and lower sides of the moving shaft 39 and the roller shaft 40.

At the time of scratching, as shown in FIG. 5, as the ball 38 moves backward, the roller shaft and the moving shaft 39 are moved.
Moves while being supported by the stable roller 41 while inclining backward. The scraper 21 advances while scraping on the sludge on the bottom wall 4, and can avoid the sludge in response to an excessive load. Then, as shown in the leftmost phantom line in FIG. 5, when the rear stabilizing roller 41 enters the pit 5, the rear roller 41 rotates downward due to the existence of the space in the pit 5,
The front roller 41 rotates upward.

Then, when the wire rope 24 is pulled in the returning direction, the device starts to retreat while keeping vertical, but the roller 41 at the lower end is guided to the surface of the pit 5, and the roller 41 at the upper end becomes the front side. Further, the roller 41 at the lower end comes to ride on the bottom wall 4. This is done by having the ball 38 down.

When returning in that state, the roller 41 hits the swash plate 42 fixed to the end wall 3 and is guided downward, so that the scraper 21 which has been above is scraped this time. In this case, the center of gravity changes as the ball 38 moves along the inclined movement axis 39.

The scraper 21 may be arranged in the center of the apparatus, as shown in phantom in FIG. Further, the guide rail 7 may be omitted, or a plurality of guide rails may be used.

In the above embodiment, the wire rope 24 is used for driving, but an underwater motor as described below may be used for driving. FIG. 7 and FIG. 8 show an embodiment of the present invention, which relates to a circular (including square) sedimentation basin, which comprises an inclined bottom wall 45 and a peripheral wall 46.
An overflow weir 47 is integrally formed on the inner circumference of the peripheral wall 46, and a circumferential baffle 48 is provided on the inner circumference of the overflow weir 47.
Is provided.

A pit 50 is formed in the center of the bottom of the settling basin and serves as a relay section for collecting sludge and discharging it as shown by an arrow Y in FIG. Reference numeral 51 denotes a substrate, which is anchor-fixed to the bottom surface of the pit 50, on which a fixed shaft 52 is projected, and in the middle of the fixed shaft 52, a roller seat 53 is horizontally provided. On the upper end of the fixed shaft 52, a fixed coupling 54 having a spline formed on the inner circumference of the upper part is attached in a vertical axis shape.

A rake 55 is provided with a roller 56 that rolls on the roller seat 53, and the bottom surface of the rake is
A scraping plate 57 and a discharge biasing plate 58 are provided. on the other hand,
Reference numeral 60 is a reversible rotation type underwater motor, and 61 is a speed reducer, an enlarged view of which is shown in FIG. That is, the submersible motor 60 is of a vertical axis type, and the motor shaft 62 projects from the bottom surface thereof and is coupled to the input shaft 63 in the speed reducer 61.

The speed reducer 61 has two upper and lower speed reduction mechanisms built therein, each being a planetary speed reduction mechanism. A is first
And B is the second reduction mechanism. 64 is a lower casing, which projects the output shaft 65 through a bearing,
Further, the cover 67 is configured to be hermetically sealed via the grease reservoir 66.

In the embodiment of FIG. 7, the flange 68 of the portion corresponding to the cover 67 is integrally extended and bolted to the upper surface of the rake 55 to fix the output shaft 65 to the coupling 5.
The submersible motor 60-equipped speed reducer 61 rotates integrally with the rake 55 by being inserted into and fixed to the rake 55.

Since the submersible motor 60 rotates, the conductive cord 69 (FIG. 8), which rotates at the same time, is guided upward through a pipe 70 extending vertically upward, and a rotary joint 71 mounted on the upper end of the pipe 70. It is taken out to the outside through the conductive electrode 72 inside. The joint 71 is made non-rotatable in the center of the pond by a wire rope 73 extending in the radial direction, and the conductive cord 69 is guided to the outside of the pond along the wire rope 73.

The joint 71 may be fixed to the bottom surface of the corridor 74 or other places as shown by an imaginary line directly or via a bracket. On the other hand, a pillar 75 is erected from above the rake 55, and a one-through scraper 76 is attached through the upper end of the pillar 75. Same scraper 76
Rotates while bringing the brushes 77 at both ends into contact with the peripheral baffle 48. The scraper 76 may be divided into the left and right parts of FIG. 7. Further, like the phantom line, the center well 78 may be provided via the scraper 76. In this case, the sewage may be caused to flow through a horizontal sewage supply pipe (not shown), and the sewage may be introduced into the well 78 as shown by an arrow X ₁ so that the sewage is allowed to flow into the pond while suppressing diffusion.

The inflow of the same sewage flows into the peripheral wall 4 as indicated by an arrow X _2.
Alternatively, the sewage may be introduced so as to pass upward from the pit 50 as shown by an arrow X ₃ . In this case, a water passage hole may be formed in the roller seat 53, the flange 68, and the like, and a guide cylinder 79 may be provided upright on the flange 68 to guide dirty water into the well 78.

As shown in FIG. 8, the conductive cord 69
Alternatively, the pipe 88 may be extended from the flange 80 of the submersible motor 60, and the conductive cord 69 may be guided along the pipe 88 upward. Further, like 81 and 82, the flange can be extended freely. Furthermore, a cylindrical cover (one of which is shown in the figure) 85 may be attached using the flanges 83 and 84 to ensure watertightness. In addition to the grease reservoir 66, an external cover 86 may be attached to the cover 67 to provide an auxiliary grease reservoir 87.

The embodiment shown in FIG. 9 is also for a circular sedimentation basin and specifically shows one of the methods for inflowing sewage. Reference numeral 90 denotes a sewage inflow pipe, which is passed through the space at the bottom of the corridor 74, the introduction pipe 91 is connected in the middle thereof, and the center well 78 is attached.
In this case, the center well 78 may be provided with a bottom wall, and sewage may flow out through the peripheral surface thereof.

The embodiment shown in FIG. 10 also relates to a circular sedimentation tank, and more particularly to an arrangement in which wastewater is introduced through the bottom of the sedimentation tank. Scraper 76
While the center well 78 is attached to the center well 78, the guide tube 79 for guiding the sewage is directed so as to correspond to the center well 78 from below. Reference numeral 95 is a sewage inflow pipe, the tip of which faces the pit 50 through the bottom wall 45. Flange 68
The water passage hole 96 penetrates through the
A communication pipe 97 rotatably faces the tip of the waste water inflow pipe 95 extending downward from 8, and a through hole 98 is formed at the lower end of the communication pipe 97 so that the waste water always flows in. ing.

The sewage from the sewage inflow pipe 95 flows into the communication pipe 97 through the passage hole 98, and the water passage hole 96 of the flange 68.
Through the guide tube 79, flows further upward, and flows into the center well 78. Center well 7
Within 8, the diffusion of sewage is suppressed and precipitation is promoted.

In the embodiments of FIGS. 7 to 10, a scum removing device is installed on the inner circumference of the sedimentation basin, and the scum is removed outside the pond by piping from the device. . That is, a fixed trough for swallowing the scum collected by the rotation of the scraper 76 is installed at a specific position on the inner circumference of the overflow weir 47, and the side on which the scraper 76 of the trough rotates is slightly lower than the water surface. It is lowered, and a weir that floats and sinks at the water surface is provided on the lower side.

This weir is pushed down by an interlocking lever or the like as the scraper 76 rotates and approaches, and swallows the scum. When the scraper 76 passes, the weir floats and blocks the inflow of scum. The trough is not limited to a fixed type, and may be a pipe type that can be rotated back and forth around a horizontal axis called a scum schema. This rotation is also rotated by the approach and passage of the scraper 76.

In the embodiment shown in FIG. 11, the output shaft 65 is formed into a square shaft, a spline, or the like, and the lower fixed insertion pipe 100 is used.
On the other hand, the guide rail 101 is installed vertically from the peripheral wall 46 so as to face the radial direction, and the rake 55 can be moved up and down. Scraper 7
It can be lifted by the wire rope 102 via 6 or the pillar 75. This allows the underwater motor 6
0 and speed reducer 61 can be inspected regularly without draining water.

In each of the embodiments shown in FIGS. 7 to 11, one scraper 76 can be passed through, and therefore, the scraper shape as shown in FIGS. 12 and 13 can be adopted. become. That is, FIG.
The scraper 76 is bent in an arcuate shape when viewed from above, and in this case, a separate rake 104 that is orthogonal to the rake 55 that is the long side and is the short side is provided.
Alternatively, the rake 55 and the separate rake 104 may be utilized to support the rake 55 via the support column 105. still,
In the figure, a scum removing device 106 is shown in the peripheral portion.

The scraper 76 shown in FIG.
It has a flat S-shape protruding in the rotational direction so as to be supported by only 5. The scraper 76 may have an arcuate shape like an imaginary line.

In the embodiment shown in FIGS. 14 and 15, a sludge attracting device is constructed in a rectangular sedimentation tank. In the sludge attracting device, a pair of left and right guide rails 112 are fixedly installed on the side wall 110 at a position slightly higher than the pond bottom 111.
By rolling a traveling roller 113 with a collar on the guide rail 112, the carrier 114 can travel forward and backward.

The carrier 114 is a frame body having a rectangular shape when viewed from above, is formed of a channel material, and a horizontal member 115 is fixed in the frame so as to form a transverse shape. The horizontal member 115 is formed in an H shape with U-shaped channel members back to back, and is the strongest structural member in the carrier 114. The horizontal member 115 may be configured in place of a member that connects the inside of the frame of the carrier 114 back and forth.

On the horizontal member 115, a drive source which is a combination of the underwater motor 60 and the speed reducer 61 is mounted. The submersible motor 60 with the speed reducer 61 is preferably installed with the center of gravity aligned with the center of the carrier 114 as much as possible. The output shaft 65 from the speed reducer 61 has a reduction ratio determined so as to rotate faster than that for a circular sedimentation tank, and a drive sprocket 117 is provided around the speed reduction ratio.
Is attached. On the other hand, the rear traveling shaft 118
A driven sprocket 120 is provided around the chain, and a chain 119 is hung between the two sprockets 117 and 120, whereby the traveling roller 113 is reversibly driven to rotate.

A pair of left and right fixed brackets 121 are attached to the upper rear side of the carrier 114, and the scraper attachment plate 1 is attached to the brackets 121 via a rotary shaft 122.
23 is vertically rotatably mounted, and a scraper 124 is mounted on the front side and a gauge roller 125 is mounted on the rear side of the lower end of the mounting plate 123. A weight 126 whose movement is adjustable (the weight may be increased or decreased) is attached to the rear side surface of the upper end of the scraper 124, and in FIG. 15, a rotational force is always applied in the clockwise direction. The rotary bracket 127 provided on the front surface of the scraper mounting plate 123 includes a chamfered portion 127a and a vertical contact surface 127b. The contact surface 127b is used for the carrier 1 when the scraper 124 is in the vertical scraping state.
The chamfered portion 127a is provided for making contact with the stopper 128 on the rear surface of the rear surface 14 and holding the state.
24 is allowed to rotate counterclockwise, which is the return direction. The scraper mounting plate 123 has a large through hole 1
Although 23a is opened, a mesh member having a fine mesh may be attached corresponding to the through hole 123a.

In the embodiment shown in FIGS. 14 and 15, the scraping is performed with the scraper 124 being vertical as shown by the solid line. This vertical state is defined by the weight 126 applying an urging force in the clockwise direction and the contact surface 127b hitting the stopper 128. Scraper 1
When the normal load is applied to 24, the scraping state is maintained by the biasing force of the weight 126, but as the load becomes excessive, the scraper 124 overcomes the biasing force of the weight 126 and the load is avoided. . It will be avoided, but the sludge will be attracted by the next approach. As a result, the stability of the operation of the sludge attracting device is ensured and various troubles of the device are reduced.

When the scraper 124 advances in the direction of the arrow X and passes the pit, the stay 28 as shown in FIG. 1 opposes the scraper 124 and the scraper 124 shown in FIG.
When the scraper 124 is lifted up by the roller 129 attached to the weight 126 and the weight 126 crosses over the rotating shaft 122 as shown by an imaginary line, the weight 126 becomes horizontal and is in a returning posture. Here, the submersible motor 60 rotates in the reverse direction, and the carrier 11
4 makes a return motion in the direction of arrow Y. Scraper 124
Is stable under the weight of the weight 126 on the carrier 114. When the device moves toward the pond edge in the returning direction, the gauge roller 125 hits the swash plate 29 in FIG. 1 and is guided in the downward oblique direction, so that the scraper 124 takes a vertical scraping posture. In addition, instead of the weight 126, the scraper 124 itself may be configured to also serve as a weight.

In the embodiment shown in FIGS. 14 and 15,
The submersible motor 60 with the speed reducer 61 improves the weight balance with the weight 126, so that the carrier 1
It may be arranged closer to the front side of 14. In this case, it is installed correspondingly on the front traveling roller 113 or a little behind it. The submersible motor 60 with the speed reducer 61 may be arranged, for example, below the carrier 114, as indicated by an imaginary line in other places. In this case, it may be arranged before and after the carrier 114, or may be concentrically arranged on the front traveling roller 113 as a front wheel drive system. On the other hand, the traveling roller may be a rear-wheel drive system or an all-wheel drive system. Further, the front weight 130 may be added. Further, as indicated by an imaginary line in FIG. 15, the rotary shaft 122 may be arranged between the front and rear traveling rollers 113 for the sake of balance. How to guide the conductive cord of the submersible motor 60 will be described with reference to FIG.

The embodiment shown in FIGS. 16 and 17 relates to a single rail type guide rail 140.
Since other configurations are substantially the same as those of the embodiment of FIGS. 14 and 15, the same reference numerals are given and the description will be omitted. 141
Is a chain cover. Although the conductive cord 142 is guided from the submersible motor 60,
Since 2 moves back and forth together with the apparatus, the first guide roller 143 of the conductive cord 142 is attached to one side of the carrier 114, and the second guide roller 144 is further arranged at the rear end of the guide rail 140. It leads to the upper part of the pond. A recoil type feeding drum (not shown) is arranged on Ikegami.

The recoil type includes a type utilizing a restoring force of a spring and a type in which a conductive cord (a protective tube may be wound) 142 is hung on a pulley so that a weight moves in or on the pond. The second guide roller 143 may be of a recoil type, and the roller 143 may be provided with a rotary joint 71 so as to be electrically conductive to the pond. In addition, the guide rails 140 are slightly separated from each other.
This rail type is also included as a single track type.

18 to 21 show a method of guiding the conductive cord. Reference numeral 150 is a sludge attracting device, 151 is a submersible motor with a speed reducer, 152 is a scraper, and the sludge attracting device 150 reciprocates along the illustrated single-orbit guide rail 153, or a pair of left and right guide rails. Make a reciprocating motion along.

In the embodiment shown in FIG. 18, the multi-joint link 1
The conductive cord is guided by utilizing the expansion and contraction action of 54.
In the embodiment shown in FIG. 19, a recoil type drum 156 is arranged in front of and behind the sedimentation basin, and a conductive cord 157 with a protective tube can be turned back and forth. In the embodiment shown in FIG. 20, the conductive cord is guided to the pond above the double-joint link 160 so that it can be expanded and contracted. FIG.
In the embodiment shown in FIG.
A conductive cord is guided along to lead to the pond, and the conductive cord is guided to the pond by a flexible tube 164 which can be bent like an imaginary line.

In the embodiment shown in FIG. 22, an underwater motor 60 with a speed reducer 61 is mounted on the outer peripheral tip of the rake 165. In this embodiment, the submersible motor 60 with the reduction gear 61 is fixed to the rake 165, the output shaft 56 thereof is projected downward, the sprocket 166 is mounted on the coaxial 65, and the chain (reception side) 167 is provided along the inner circumference of the pond. Is attached so that the sprocket 166 makes a star movement. The sprocket 166 is a belt pulley,
The chain 167 may be a V belt. Alternatively, a timing belt system may be used. Further, a rubber belt may be attached to the inner circumference of the pond, and a grooved wheel or a rubber wheel may be provided on the side of the rake 165 so as to be rotatable and driven.

In the embodiment shown in FIG. 23, a rubber wheel 169 is provided on the side of the rake 165, and a belt 170 made of a metal belt or a rubber belt is provided on the other side thereof. It is also possible to fix the output shaft 65 to the rake 165 and rotate the submersible motor 60 with the speed reducer 61.

As shown by the phantom line in FIG. 23, rollers 172 may be arranged so as to roll along the bottom wall 45 of the pond. The position may be closer to the inner diameter.

The embodiment shown in FIG. 24 may be any of the rotary drive methods described above, but the rake 165 thereof can be lifted for maintenance. One rake 165 is provided with a bracket 175 with a sleeve that rotates around the fixed shaft 52, and the inner peripheral side base of the other rake 165 is fixed to the bracket 175 by a hinge shaft 176 so as to be vertically rotatable.

Lifting is performed by using a wire rope with a hook or the like in the corridor 74, and the submersible motor 60 with the speed reducer 61 is lifted above the surface of the water like a virtual line so that maintenance can be performed freely. become.
The conductive cord 177 is provided with an upper rotary joint 179 through a pipe 178 standing on the one rake 165.
Try to lead to. In addition, the underwater motor 6 at the rake tip
In addition to the one in which 0 is provided, the tilting method can be adopted for the type in which the submersible motor 60 is arranged in the center of the pond.
Submersible motor 6 on both and one side of rake 165
If 0 is placed, both of them should be lifted.

The embodiment shown in FIG. 25 is for a rectangular sedimentation basin, in which 181 is a peripheral wall and 182 is a bottom wall.
Reference numeral 83 indicates a pit. A fixed shaft 184 is provided upright from the pit 183, a fixed cylinder 185 is provided on the outer periphery thereof, and an output shaft 186 is provided at the upper end of the fixed shaft 184.
Are fitted together to form a fixed shaft. The submersible motor 60 with the speed reducer 61 is mounted on both rakes 187 so as to rotate together.

The rake 187 comprises a rake body 188 and an over rake 189. The rake body 188 is a vertically long casing having an upper surface that is horizontal and a lower surface that obliquely rises in the outer diameter direction, and a slit that extends in the direction of the arrow in FIG. 26 is formed at the lower end. The lower front and rear surfaces of the main body 188 are provided with guide rails 191 bulging in a U-shape, and a plurality of guide rollers 192 are attached to the front and rear sides of the guide rail 191.

The overrake 189 is telescopically fitted into the main body 188 and has a plate-shaped portion that fits inside the main body 188. Guide rails 191 are provided on the front and rear surfaces of the plate-shaped portion. A ridge 193 that is movable in the direction of the arrow is provided along. Further, a roller 195 for advancing while making contact with the inner surface 194 of the pond is attached to the tip of the overrake 189, while the overrake 189 is always installed in the guide rail 191 in the outer diameter direction. A spring 196 that biases the spring is built in.

As shown by the solid line in FIG. 25, when the roller 195 is located at the corner of the rectangular sedimentation basin, the overrake 189 is guided by the guide roller 192 by the biasing force of the spring 196.
Is stretched by. Each of the over rake 189 and the rake body 188 has a scraping plate 19 individually.
Since 8, 199 is attached, with these,
It is possible to scrape sludge. When the rake 187 rotates in the direction of the arrow in FIG. 25 by the submersible motor 60 with the speed reducer 61, the roller 195 advances along the inner peripheral surface 194, so that the overrake 189 gradually retracts. That is, since the ridge 193 is smoothly guided by the guide roller 192 along the guide rail 191,
The overrake 189 retracts against the spring 196.
The outer scraping plate 198 is shown in FIG.
Move in the direction of the arrow.

[0076]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the apparatus can be structurally greatly simplified and an inexpensive sludge drawing apparatus can be provided.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a sludge attracting device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view showing a moving weight type embodiment.

FIG. 4 is a cross-sectional view showing another embodiment of a moving weight type.

FIG. 5 is a side sectional view showing another embodiment.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a vertical cross-sectional view showing another embodiment of the circular sedimentation tank.

FIG. 8 is a partially cutaway external view showing an outline of the submersible motor with a reduction gear and a modification thereof.

FIG. 9 is a vertical sectional view showing another embodiment of the circular sedimentation tank.

FIG. 10 is a vertical sectional view showing another embodiment of the circular sedimentation tank.

FIG. 11 is a vertical cross-sectional view showing another embodiment of the circular sedimentation tank.

FIG. 12 is a plan view showing another example of the scraper.

FIG. 13 is a plan view showing another example of the scraper.

FIG. 14 is a plan view showing another embodiment of a sludge attracting device for a rectangular sedimentation tank.

FIG. 15 is a vertical sectional view of the sludge attracting device.

FIG. 16 is a side view showing another embodiment of the single-orbit sludge attracting device.

FIG. 17 is a plan view of the sludge attracting device.

FIG. 18 is a plan view showing a method of guiding a conductive cord.

FIG. 19 is a vertical cross-sectional view showing another example of a conductive cord guiding system.

FIG. 20 is a vertical cross-sectional view showing another example of the conductive cord guiding system.

FIG. 21 is a vertical cross-sectional view showing another example of a conductive cord guiding system.

FIG. 22 is a vertical cross-sectional view showing another embodiment of the circular sedimentation tank.

FIG. 23 is a vertical cross-sectional view showing another embodiment.

FIG. 24 is a vertical cross-sectional view showing another embodiment in which the rake can be raised and lowered.

FIG. 25 is a plan view showing an embodiment of a rectangular sedimentation basin.

FIG. 26 is a vertical cross-sectional view of the same embodiment.

[Explanation of symbols]

7 ... Guide rails, 21 ... Scrapers, 32, 35 ... Moving weights, 60 ... Underwater motors, 61 ... Reducers, 65
... output shaft, 76 ... scraper, 112, 140 ... guide rail, 113 ... traveling roller, 114 ... carrier, 1
24 ... scraper.

Claims (16)

[Claims] 1. A crawling posture in which the sludge can travel back and forth in parallel with a bottom surface where sludge is accumulated and can sludge in one direction, and a return posture in which the sludge can be avoided and pass over the sludge. In a sludge scraping device comprising a switchable scraper and a drive device for reciprocating the scraper, the scraper is in a scraping position by its own weight at a fulcrum and a scraping position for an excessive load. Sludge that can be temporarily avoided in the returning range, but can be switched to the return position by rotating by the facing surface and the center of gravity exceeding the fulcrum, and can also be switched from the return position to the scratching position by the facing surface. Scraping device. 2. The sludge scraping device according to claim 1, wherein the scraper has an internal space formed therein, and a moving weight such as water or a ball for moving the center of gravity between the scraping position and the returning position is provided therein. 3. The sludge attracting device according to claim 1, wherein a guide rail is provided on the bottom surface, and the guide rail is a single track. 4. A crawling posture capable of traveling back and forth in parallel with the bottom surface of the sludge accumulating and capable of crawling sludge in one direction, and a returning posture capable of avoiding the sludge and passing through the sludge. A sludge scraping device comprising a switchable scraper and a drive device for reciprocating the scraper, wherein the drive device is a combination of a submersible motor and a speed reducer as a drive source. apparatus. 5. The sludge attracting device according to claim 4, wherein a guide rail is provided on the bottom surface, and the guide rails are arranged so as to be separated from each other on the left and right. 6. The sludge attracting device according to claim 4, wherein a guide rail is provided on the bottom surface, and the guide rail is a single track. 7. A rotary rake is formed in a sedimentation basin represented by a circular shape or a square shape, and a scraper is rotatably provided on the water surface, and scum from the scraper is a scum removing means. In the sludge attracting device, the rake and scraper can be simultaneously driven by an underwater motor with a speed reducer. 8. The submersible motor with a speed reducer according to claim 7, wherein the output shaft from the speed reducer is fixed and the submersible motor with a speed reducer can rotate together with the rake and scraper. Sludge attracting device. 9. The sludge attractor according to claim 7, wherein the submersible motor with a speed reducer is mounted on the outer peripheral side end of the rake, and the output shaft or the speed reducer side is rotatably driven with the inner side of the pond as the receiving side. apparatus. 10. The sludge attracting device according to claim 9, wherein the receiving side is a chain and the rotation driving side is a sprocket. 11. The sludge attracting device according to claim 9, wherein the rotation driving side is a rubber wheel, and the rotation side is driven to rotate while the wheel is in contact with the receiving side. 12. The sludge attracting device according to claim 7, wherein the conductive cord from the submersible motor is guided to the outside of the pond through a rotary joint. 13. The sludge scraping device according to claim 7, wherein the scraper is a single scraper in the pond. 14. The sludge attracting device according to claim 9, wherein the rake can be tilted up and down around a rotation fulcrum having a horizontal axis. 15. A sludge scraper comprising a rotary rake in the rectangular sedimentation basin, the rake comprising a long rake body and an overrake which is linearly expandable and contractable with respect to the rake body. Device. 16. The sludge attracting device according to claim 15, wherein the overrake is constantly urged by a spring in the inner circumferential direction of the pond.