JPH09814A - Sludge raking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sludge raking device which is simple in structure and inexpensive by a method in which in the reciprocation of a raker, a raking position is taken by its own weight depending on a fulcrum as a boundary, temporary avoidance is possible for an excessive load, and the position is changed to a returning position when the center of gravity crosses the fulcrum. SOLUTION: A raker 21 is biased clockwise on the fulcrum of a fixed shaft 19 by a weight 23, its own weight, etc., and hits a bottom wall by a lower part roller 22 to take a raking position. The raker is hollow, liquid 32 such as water is introduced into it to function as a moving weight, and cylindrical water tanks 33 are formed at both upper and lower ends. The raking position is stabilized by the clockwise rotational force by the water tanks 33 and water in the raker 21, the raker 21 is lifted on the pit side, and the internal water 32 is moved in the upper end side water tank 33 so that the center of gravity is moved for the raking position.

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 has a raking posture capable of traveling back and forth on the bottom surface of the sludge accumulating and being able to draw the sludge in one direction. In a sludge scraping device equipped with a scraper capable of avoiding the sludge and returning to a returning posture capable of passing over the sludge, and a drive device for reciprocating the scraper, the scraper has a self-weight with a fulcrum as a boundary. While it is possible to temporarily avoid the excessive load in the range where it can return to the scratching position, the opposite faces rotate and the center of gravity moves beyond the fulcrum to switch to the returning position. It is possible to switch from the returning posture to the approaching posture by the surface.

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. Is characterized by being capable of switching between normal and reverse rotation.

According to a fifth aspect of the present invention, in the fourth aspect, the scraper is mounted on a carrier having front and rear traveling wheels, and the traveling wheels and a drive device are interlocked by a transmission means. .

The invention according to claim 6 is the invention according to claim 4 or 5.
In the above, the scraper can be rotated back and forth by its own weight with a fulcrum as a boundary, and switching from one of the scratching posture and the returning posture to the other is performed by a surface facing the scratching device. It is like this.

According to a seventh aspect of the present invention, in the sixth aspect, the scraper is provided with a weight that can be rotated back and forth with the fulcrum as a boundary.

According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects, the drive device is provided with a cover.

According to a ninth aspect of the present invention, in the eighth aspect, the space between the drive unit and the cover is a closed space, and the space is filled with a liquid.

The invention according to claim 10 is capable of traveling back and forth in parallel to the bottom surface of the sludge, and is capable of running in one direction and pulling the sludge in one direction. 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. The forward and reverse rotation can be switched, and the attitude of the scraper can be changed in conjunction with the device.

According to an eleventh aspect of the present invention, in the tenth aspect, the two rotatable drive levers are provided so as to project from the drive device side, while the driven interlocking that is interlocked with the drive lever projects from the scraper side. It is set up.

According to a twelfth aspect of the present invention, in the tenth aspect, a wheel that rotates around the rotation center of the scraper is interlocked from the driving device side, and the wheel is responsive to a certain load or more. A two-way clutch that can freely cut the rotation in the forward and reverse directions is provided.

According to a thirteenth aspect of the present invention, in the tenth aspect, the scraper is mounted on a carrier having traveling wheels, and a wheel that rotates in conjunction with a drive device is provided near the traveling wheels of the carrier. The wheel is a two-way clutch type, and a transmission means for switching the rotation from the same wheel to the scraper side in the opposite direction is provided.

The invention described in claim 14 is from claim 4 to claim 1.
In any of up to 3, guide rails are provided on the bottom surface, and the guide rails are arranged so as to be separated from each other on the left and right.

The invention according to claim 15 is from claim 4 to claim 1.
In any of up to 3, a guide rail is provided on the bottom surface, and the guide rail is a single track.

According to a sixteenth aspect of the present invention, a rotary rake is constructed in a sedimentation basin represented by a circle or a square, and a scraper is rotatably provided on the water surface. In the sludge attracting device in which the scum 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 a seventeenth aspect of the present invention, in the sixteenth aspect, an underwater motor with a speed reducer is mounted in the center of the rake, and the output shaft from the speed reducer is fixed, while the underwater motor with a speed reducer is provided. It can be rotated together with the rake and scraper.

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

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

According to a twentieth aspect of the present invention, in the eighteenth aspect, the rotation driving side is a rubber wheel, and the wheel is rotatably driven while being in contact with the receiving side.

According to a twenty-first aspect of the present invention, in any one of the sixteenth to twentieth aspects, the conductive cord from the submersible motor is guided to the outside of the pond through a rotary joint.

According to the invention of claim 22, in any one of claims 16 to 20, one scraper is provided in the pond.

According to a twenty-third aspect of the present invention, in any one of the eighteenth to twenty-second aspects, the rake can be tilted up and down around a horizontal fulcrum.

According to the twenty-fourth aspect of the present invention, a rotary rake is constructed in the rectangular sedimentation basin, and the rake is composed of 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 twenty-fifth aspect of the present invention, in the twenty-fourth aspect, the overrake is always biased by a spring in the inner circumferential direction of the pond.

[0029]

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 of a single track and has a box-shaped cross section, on which the 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 an end of the bracket 15 so as to contact a 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.

Front and rear 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 an upper drive source (not shown) via a sheave 25 attached to the end wall 3. 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 approaches 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 is hollow, and water (other liquid may be used) 32 is put therein, which 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 forward and backward by a single traveling roller 14 on a plate-shaped or housing-shaped single track type 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 a result of the ball 38 moving 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 this state, the roller 41 hits the swash plate 42 fixed to the end wall 3 and is guided downward, so that the scraper 21 that 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 at 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.

Reference numeral 50 is a pit, which is formed in the center of the bottom of the sedimentation 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 which rolls on the roller seat 53, and the bottom surface of which 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 of which is 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 shown in 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 the pipe 70 extending vertically upward, and the 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 another portion 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 basin, and more particularly to one in which sewage is introduced through the bottom of the sedimentation basin. 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.

Waste water from the waste water inflow pipe 95 flows into the communication pipe 97 through the through hole 98, and the water flow 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 shown in FIGS. 7 to 10, a scum removing device is installed on the inner circumference of the sedimentation pond, 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, since one scraper 76 can be passed through, it is possible to adopt the scraper shape as shown in FIGS. 12 and 13. 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, the 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 has a chamfered portion 127a and a vertical contact surface 127b. The contact surface 127b is provided on the carrier 11 when the scraper 124 is in the vertical scraping state.
The chamfered portion 127a is for contacting the stopper 128 on the rear surface with the surface of the scraper 12 and holding the state.
4 is allowed to rotate counterclockwise, which is the return direction. The scraper mounting plate 123 has a large through hole 12
Although 3a is opened, corresponding to the through hole 123a,
A mesh member having a fine mesh may be attached.

In the embodiment shown in FIGS. 14 and 15, 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 stay 28 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.

The scraper 124 is stabilized by the weight of the weight 126 on the carrier 114. When the device moves in the returning direction and reaches the pond end, the gauge roller 125 is moved to the position shown in FIG.
The scraper 124 is brought into a vertical scraping position by hitting the swash plate 29 and being guided obliquely downward. 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 of a rear wheel drive system or an all wheel drive system. Furthermore, front weight 13
0 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 cords of the cylinder and the underwater motor 60 will be described with reference to FIG. 16 and subsequent figures.

The embodiments of FIGS. 16 and 17 relate to the guide rail 140 of a single track type.
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 attached to 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 may be a belt pulley and 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 phantom lines in FIG. 23, rollers 172 that roll along the pond bottom wall 45 may be arranged. 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 up 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 using a wire rope with a hook or the like in the corridor 74, and the underwater motor 60 with the speed reducer 61 is lifted above the water surface 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 to the one in which the underwater motor 60 is provided at the tip of the rake, the tilting system can be adopted for the type in which the underwater motor 60 is arranged in the center of the pond. Rake 1
When the submersible motor 60 is provided on both one side and the other side of 65, both of them are 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, the ridges 193 are the guide rails 19.
By being smoothly guided by the guide roller 192 along 1, the overrake 189 retracts against the spring 196. The outer scraping plate 198 moves in the direction of the arrow in FIG. 26 along the slit.

The embodiments shown in FIGS. 27 to 29 show another example of the submersible motor-driven sludge attracting device.
200 is a sedimentation basin, and 200 is a rectangular sedimentation basin.
01 is a side wall orthogonal to the longitudinal direction, 202 is a bottom wall, 2
Reference numeral 03 indicates each pit.

At the center of the bottom wall 202 of the pond, a groove 204 oriented in the longitudinal direction is formed by means of a flange.
A concrete 206 is laid on the lower plate 205 along the line 04, and an upper plate 207 is laid on the lower plate 205 so as to be flush with the bottom wall 202. A pair of left and right guide rails 208 are fixedly installed by bolts (not shown) via the upper surface of the upper plate 207.

The guide rails 208 are made of corrosion-proof grooved steel, and the left and right guide rails 208 are installed separately with their grooves facing each other. The guide rail 208 is laid from above the pit 203 to near the other side wall 201.

Reference numeral 210 denotes a carrier, which serves as a traveling trolley, and the carrier 210 is provided with side frames 211, which are also made of grooved steel, separated from each other in the left-right direction so that the grooves are oriented in opposite directions. , The two side frames 211 are connected to each other by a plurality of connecting members 212 .. The carrier 210 has a front axle 213 serving as a drive shaft on the front side and a scraper shaft 21 also serving as a rear axle on the rear side.
4 are rotatably provided.

The front axle 213 and the scraper axle 214 are
A pair of left and right running rollers 216 are attached to each, and the running rollers 216 roll on the guide rails 208. Roller brackets 218 project downward from the front and rear of each side frame 211, and retaining brackets 219 and side rollers 220 are attached to the brackets 218 so as to come into contact with the guide rails 208 and rotate. .

On the upper surface of the carrier 210, the mounting table 221
The drive device 222 is mounted via the. The drive device 222 is a combination of the submersible motor 223 and the speed reducer 224 as described above, and the output shaft 225 is provided on the left side in the scraping direction. A drive sprocket 226 is attached to the output shaft 225, which is shown in FIG.
In FIG. 7, the clockwise and counterclockwise rotations are made possible, and when returning, they are made to rotate normally and reversely so as to rotate in the opposite direction. The forward rotation continues until the device gets on the pit 203, and the reverse rotation continues until it reaches the right end of FIG.

A driven sprocket 228 is attached to the left end of the front axle 213 to drive the sprocket 22.
6 and 6 can be interlocked via a chain 229. The drive device 222 is provided with a cover 230 which will be described later in detail.

As shown in FIG. 28, the scraper shaft 214 extends to the left and right sides so that the coaxial 214 does not move laterally with respect to the carrier 210. A central scraper 233 is mounted in the middle of the scraper shaft 214 via a bracket 232, and side scrapers 234 are rotatably mounted together with the scraper shaft 214 on both sides of the scraper shaft 214 via the bracket 232. .

A rod 236 is provided opposite to the left and right from the bracket 232, and weights 237 for changing the posture are attached to the upper ends of these rods 236. On the other hand, an upper stopper 238 is provided on the carrier 210 so as to face the central scraper 233.

A guide roller 239 is provided at the inner end of the side scraper 234, and an arcuate guide 2 is provided in front of the side wall 201 so as to face the roller 235.
40 is fixedly installed.

27 to 29, the state shown by the solid line is the approaching posture, and the state shown by the phantom line is the returning posture.
The direction indicated by the arrow X in FIG. 27 indicates the drawing direction, and the arrow Y indicates the returning direction. In the approaching position shown by the solid line in FIG. 27, the scraper 234 is vertical, and the lower stopper 241 stops the scraper 234,
The weight 237 is in a state in which its rotational moment is applied backward. In this state, the sludge collected on the bottom wall 202 is scraped to the left by the scraper 234, and the sludge is brought to the pit 203.

When an excessive load is applied to the scraper 234, the scraper 234 is lifted up to avoid the load. The device travels until the scraper 234 is on the focus 203. This traveling is performed by rotating the traveling roller 216 from the drive device 222 via the drive sprocket 226, the chain 229, and the driven sprocket 228. At this time, the output shaft 225 rotates counterclockwise.

When the device comes over the pit 203, as shown in FIG.
By hitting the reversing cam 242 as indicated by an arrow, the scraper 234 is rotated forward by about 45 ° as indicated by an imaginary line. At this time, since the weight 237 slightly exceeds a fulcrum which is the scraper shaft 214, a forward rotational force is generated in the scraper 234. Actually, a forward rotational force is generated from the time when it is rotated about 30 °, and thereafter, it is rotated forward by inertia and the scraper 233 contacts the upper stopper 238 and stops.

After that, the output shaft 225 of the drive device 222 rotates in the opposite direction, clockwise. Then, the carrier 210 makes a return motion in the Y direction of FIG. At this time, since the scraper 234 is lifted, it passes above the sludge and is returned to the side wall 201 side. At the return end, the guide roller 239 descends along the guide 240, so that the scraper 234 is guided to the vertical scraping posture. The scraper 234 is held vertically by the lower stopper 241. 243 is a bearing stay.

When the scraper 234 is returned to the vertical position, the output shaft 225 of the drive device 22 is reversely rotated and travels in the scraping direction. The weights 237 are stacked in a plurality of stages, and the weight thereof can be changed by attaching and detaching. Further, the driven sprocket may be provided around the scraper shaft 214. further,
In the above-described embodiment, the pair of left and right guide rails are separated, but a single track type may be used.

The cover 230 is shown in FIGS. 30 to 33. The cover 230 is for the drive sprocket 2
Drive device 222 including 26 and driven sprocket 228
It covers the whole and is mountain-shaped when viewed from the side, and the lower part is open. The front left and right end portions 244 are shaped to cover the side frame 211, and the space between the left and right end portions 244 is the carrier 210.
The front flange 245 for mounting is provided along the upper surface of the. A stay take-out hole 246 is formed between the front and rear, and rear left and right end portions 247 are formed along the side frame 211, and a cutout portion 248 is formed between them to form the weight 2
37 comes in. 249 is a rear flange for mounting. The cover 230 may be made of metal sheet metal or resin.

In the embodiment shown in FIGS. 35 and 36, the posture conversion between the approaching posture and the returning posture is performed in conjunction with the driving device 222. Therefore, the guide roller 239 and the guide 240 of FIG. 27 are not configured.

In FIG. 34, on the left side, the state in which the solid line is in the retracted posture is converted into the virtual line return posture, and in the right side, the state in the solid line is in the virtual line retracted posture. The states converted into are respectively shown. In the embodiment, the left side of the mounting base 221 is extended as an auxiliary base 252 as shown in FIG. 35, and on the auxiliary base 252, a pair of bearings 253 are installed and these bearings 253 are provided. The output shaft 225 is supported through.

On the outer periphery of the output shaft 225, there are two first (solid line) and second (dashed line) rotary levers 25 that are displaced in the longitudinal direction.
4, 255 projectingly provided, a hinge 259 and a coil spring (not shown) are provided at the tip of each lever 254, 255, and the coil spring has a first (solid line) and a second (dashed line) kick lever 256 at its tip. 257 is always returned to the standing state. The first kick lever 256 is
With respect to the first rotary lever 254, the escaping operation is performed counterclockwise in FIG. 34, but the opponent is driven clockwise. The second kick lever 257 runs away from the opponent in the counterclockwise direction in FIG. 34 with respect to the second rotary lever 255, but drives the opponent in the clockwise direction. Therefore, each lever 256, 257
A stopper 258 is projectingly provided at the base of the.

Therefore, the counterpart is provided on the bracket 232 around the scraper shaft 214 in a protruding manner.
One is a scraping lever 260 shown by a solid line, and the other is a returning lever 261 shown by a broken line. A roller 263 is attached to each tip of the first kick lever 256 and the second kick lever 257. First kick lever 256
The roller 263 on the side and the lever 260 for scraping correspond to each other, and the roller 263 on the side of the second kick lever 257 and the lever 261 for returning correspond to each other.

The solid line on the left side of FIG. 34 indicates that the scraper 234 is in the vertical position at the end of the scraping posture, and at this time, the output shaft 225 has rotated counterclockwise. Switch to. As a result, as shown in the figure, the output shaft 225 starts rotating to the right, but the approaching lever 260 is out of the track and is not in contact with the roller 263. On the other hand, since the return lever 261 is located lower than that, the roller 26 on the second kick lever 257 side is
Kicked down to 3. This state is shown by a virtual line.

Like the phantom line, the carrier 210 is slightly returning, and the weight 237 crosses the fulcrum after the returning lever 261 is kicked down by about 30 ° by the roller 263. Lift by weight. The broken line in the horizontal direction is the return lever 26.
1 indicates a state where the lower limit is reached, and in this state, the roller 263 is no longer in contact with the lever 261. At the same time, the draw lever 260 also rotates downward.

When the scraping lever 260 moves downward, the roller 263 rotates clockwise and hits it.
Since the roller 263 rotates in the clockwise direction, the roller 263 makes an escape motion and passes through. When the carrier 210 is returned to the position shown in the right end of FIG. 34, the output shaft 225 rotates in the reverse direction and the roller 263 starts rotating counterclockwise. As a result, only the roller 263 of the first kick lever 256 hits the scraping lever 260 and kicks up the lever, so that the scraper 234 is in the vertical posture with the help of the weight 237. This is the approaching posture. This posture change involves the forward movement of the carrier 210. Also in this case, the roller 263 of the second kick lever 257 does not move the return lever 2
Although it hits 61, there is no problem because it runs away.

In the embodiment shown in FIG. 36, a screw shaft 265 is provided as an output shaft, and a coaxial screw 265 is formed with a screw in one direction. On the outer periphery of the screw shaft 265, a pin 26 with a roller engaging with the groove 265a of FIG.
6 is provided with a shifter 267.
7 reciprocally shifts in parallel along a horizontal guide 268 in a non-rotating state. The auxiliary base 252 is provided with a fulcrum shaft 270, and one switching lever 271 is swingably supported via the coaxial 270.

One end of the switching lever 271 is provided with the shifter 2
67, and the other end is inserted into the cam groove 274 of the cam plate 273 on the driven side via the roller 275.
As shown in FIG. 37, a guide protrusion 265b is provided at the end of the groove 265a of the screw so as to repeatedly pass through the pin 266 in the right direction of the arrow and guide it in the groove in the opposite direction. The other end of the screw shaft 265 has the same structure.

The solid line in FIG. 36 shows the state of the scratching posture. In the approaching position, the screw shaft 25 is counterclockwise,
In this state, as shown in FIG.
Since it repeatedly passes through the end groove of 65a, the shifter 2
67 does not shift from the solid line state. On the other hand, when the scraping posture ends and the returning posture is entered, the screw shaft 265 reversely rotates, but this causes the pin 266 to enter the groove 265 and shift the shifter 267, so that the switching lever 271 swings like a virtual line. It moves and moves in the cam groove 274. As a result, since the cam groove 274 is formed in an oblique direction, the scraper 234 is lifted via the scraper shaft 214.

In the returning posture, the shifter 267 is held at the position of the virtual line. Then, when shifting to the scratching position, the shifter 267 is driven in the direction of the solid line, and as a result, the scraper 234 descends to the scratching position.

The embodiment shown in FIG. 38 has a chain 229.
The sprocket 277 is arranged so as to mesh with the middle of the sprocket 277, and the sprocket 278 around the scraper shaft 214 is rotationally driven from the sprocket 277 through another interlocking chain 278. A two-way clutch 280 is provided between the inner circumference of the sprocket 278 and the scraper shaft 214.
The scraper 234 slides when a load is applied to the scraper 234 at the upper limit or the lower limit.

When the output shaft 225 rotates counterclockwise and moves closer to it, the sprocket 277 rotates in the opposite right direction,
The sprocket 278 also rotates in the same direction as that of the sprocket 277, and takes a drawing posture. When the clutch 280 finally works, the clutch 280 slips and holds its scratched posture. Output shaft 2
When 25 rotates clockwise, the sprockets 277, 27
8 rotates counterclockwise and the scraper 234 is lifted.
Also at this time, the clutch 280 slips and holds the lifted state.

In the embodiment shown in FIG. 39, the drive sprocket 226 around the output shaft 225 is hooked with the chain 282 to drive the sprocket 283 in front of the scraper shaft 214. No. 1 on the side of the sprocket 283.
A gear 284 is provided, and a second gear 285 is provided on the scraper shaft 214 side so as to mesh with each other. A two-way clutch 286 is formed between the second gear 285 and the scraper shaft 214. In this case as well, the output shaft 225 rotates forward and backward to switch the scraper 234 up and down, and at this time, the two-way clutch 286 operates at the limit.

The cover 230 is equipped with an underwater safety lamp 288 which emits blue light in the approaching posture and red light in the returning posture. It may be blinking.

The embodiment shown in FIG. 40 has a carrier 210.
This is to prevent the slip. A sleeve 290 is provided on the upper side of the front and rear ends of the guide rail 208, and a wire rope 291 is hung on the front and rear ponds via these. The middle of the wire rope 291 is wound around one of the traveling rollers 216, while both ends of the wire rope 291 are connected to the spring 29 via spring supports 292.
Taken in 3. The wire rope 291 is always pulled by the spring 293 with an appropriate strength, and is wound around the traveling roller 216 with an appropriate winding force.

In the embodiment shown in FIG. 41, the wire rope 291 is wound around the traveling roller 216 as in the case of the above-mentioned embodiment. Particularly, for maintenance purposes, the wire rope 291 is used to transfer the carrier 210 to the pond. It was designed to surface. For this reason, the auxiliary guide rail 295 extends from the guide rail 208 to the slanted pond, and the sleeve 296 is movably arranged at a curved portion in the middle to allow the wire rope 291 to pass through the pond.

As shown in FIG. 42, racks 297 are arranged on the left and right sides of the guide rails 208 to the auxiliary guide rails 295, and pinions 298 that mesh with the racks 296 are provided on both sides of the sleeves 296. Accordingly, when the traveling roller 216 is driven in the scraping direction, the carrier 210 moves along the wire rope 291 and the carrier 210 is driven beyond the normal limit, so that the sleeve 296 is also pushed and lifted up to the pond. is there.

To return to the pond, the drive device is rotated in the reverse direction, and the sleeve 296 is hooked and lowered together with the carrier 210, and the sleeve 296 is moved to the auxiliary guide rail 295.
By engaging the stopper 299 provided in the carrier 21
It deviates from 0 and stops at that position. After that, the carrier 210 is still driven and returns to the normal guide rail. Now, it is returned to the normal operating state.

In the embodiment shown in FIG. 43, the guide rail 208 is laid by a simple work such as a drill hole without making the bottom wall 202 large as in FIG. 28.

That is, the guide rail 20 of the bottom wall 202.
Chemical anchor 3 in place while trying to lay
00 is driven in and the guide rail 208 is fixed using the anchor 300. On the guide rail 208 side, a level matching plate 302 made of a rectangular plate is horizontally welded and fixed in the middle stage except the last plate to be welded, and a fixing plate 303 is fixed to the lower stage. The guide rail 208 is lowered and temporarily fixed by the anchor 300 and the nut 304 by the fixing plate 303, and then the guide rail 20 is fixed by the anchor 300 and another nut 304 by the leveling plate 302.
8 levels are adjusted and fixed. Then, finally, the upper plate 301 is welded. 305 is a spacer.

The embodiment shown in FIG. 44 has a drive unit 222.
The underwater cover 306 is attached to the
Reference numeral 2 denotes a submersible motor 60 coupled to a speed reducer 61. In particular, in this embodiment, a seat plate 60a of the motor 60 is used.
Is extended in the outer diameter direction more than usual, and the motor cover 309 is fixed by screwing the bolt 308 into the back nut 307 using the hole 60b opened at the equiangular position of the outer periphery of the seat plate 60a. , The flange 309 of the cover 309
The flange 3 is formed by further extending a in the outer diameter direction.
The base portion of the underwater cover 306 is fastened with bolts and nuts 310 using 09a.

The other side surface of the cover 306 is fixed with bolts 312 by a plurality of high nuts 311 ... Integral with the cover 67. 313 is a gland packing, and the output shaft 6
The purpose of this is to prevent the corrosion of the outer peripheral surface of No. 5 from advancing into the drive unit. A detachable stopper 314 is screwed onto the upper surface of the cover 306, and by opening the stopper 314, the cover 306 is filled with a liquid such as water or oil, which prevents water from entering from the outside. Sometimes you have to do it. In the case of filling with water, a water activator such as barley stone can be put inside. Also, the motor seat plate 6
0a or the flange 309a of the motor cover to attach the stay 315 and connect the cord relay pipe 316.
May be provided.

[0130]

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.

FIG. 27 is a side sectional view showing another embodiment of the submersible motor drive type sludge attracting device.

28 is a sectional view taken along the line P-P of FIG. 27.

FIG. 29 is a plan view of the device.

FIG. 30 is a plan view showing details of the cover.

31 is a view taken along the line MM in FIG.

32 is a sectional view taken along line LL in FIG.

33 is a cross-sectional view taken along the line NN of FIG.

FIG. 34 is an operation explanatory view of the scraper interlocking sludge attracting device.

FIG. 35 is a plan view of the device shown in FIG. 34.

FIG. 36 is a plan view showing another embodiment of the scraper interlocking sludge attracting device.

FIG. 37 is an enlarged plan view of an essential part of the device.

FIG. 38 is a side view showing another embodiment of the scraper interlocking sludge attracting device.

FIG. 39 is a side view showing another embodiment of the scraper interlocking sludge attracting device.

FIG. 40 is a side view showing another drive system of the submersible motor drive system sludge attracting device.

FIG. 41 is a side view showing a system for raising the sludge attracting device to perform maintenance on the pond.

42 is a cross-sectional view taken along the line HH of FIG. 41.

FIG. 43 is a vertical cross-sectional view showing another method of laying the guide rails.

FIG. 44 is a schematic cross-sectional view showing another embodiment in which a driving device is provided with a cover.

[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 (25)

[Claims] 1. A slanting bottom surface capable of traveling back and forth on a bottom surface where sludge is accumulated, and a slanting posture in which sludge can be clawed in one direction, and a return posture in which sludge can be bypassed and passed over the sludge can be switched. A scraper and a drive device for reciprocating the scraper, the scraper can take a scraping posture by its own weight at a fulcrum and return to a scraping posture against an excessive load. While it is possible to avoid temporarily in the range, it is switched to the return posture when the center of gravity exceeds the fulcrum by rotating by the facing surface,
A sludge scratching device that can be switched from the return position to the scratching position by the opposing surfaces. 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 attracting 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, and the device is a reverse rotation switching device. Sludge attracting device characterized by being enabled. 5. The sludge attracting device according to claim 4, wherein the scraper is mounted on a carrier having front and rear traveling wheels, and the traveling wheels and a drive device are linked by a transmission means. 6. The scraper according to claim 4, wherein the scraper can be rotated forward and backward by its own weight with a fulcrum as a boundary, and the scraping posture and the returning posture can be switched from one posture to the other posture. A sludge scraping device adapted to be provided by a surface facing the scraping device. 7. The sludge attracting device according to claim 6, wherein the scraper is provided with a weight that can be rotated back and forth with the fulcrum as a boundary. 8. The sludge attracting device according to claim 4, wherein the drive device is covered with a cover. 9. The sludge attracting device according to claim 8, wherein a closed space is provided between the drive device and the cover, and the space is filled with a liquid. 10. 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. A sludge attracting 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, and the device is a reverse rotation switching device. A sludge attracting device that is capable of changing the posture of the scraper in conjunction with the device. 11. The sludge scraper according to claim 10, wherein two rotatable drive levers are provided projecting from the drive device side, and a driven interlocking projecting from the scraper side is provided projecting from the scraper side. Device. 12. The drive device side is configured so as to interlock with a wheel that rotates around the rotation center of the scraper, and the wheel rotates in the forward and reverse directions in response to a certain load or more. A sludge attracting device equipped with a two-way clutch that can be disconnected. 13. The scraper according to claim 10,
It is equipped on a carrier equipped with running wheels, and a wheel that rotates in conjunction with a drive device is provided near the running wheels of the carrier. The wheel is a two-way clutch type, and from the wheel to the scraper side. A sludge drawing device provided with a transmission means for switching the rotation in the opposite direction. 14. 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 sides. 15. 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. 16. 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, 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. 17. The underwater motor with a speed reducer is mounted in the center of the rake according to claim 16, wherein the output shaft from the speed reducer is fixed and the underwater motor with a speed reducer is rotated together with the rake and scraper. Sludge attracting device enabled. 18. The sludge attractor according to claim 16, 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. 19. The sludge attracting device according to claim 18, wherein the receiving side is a chain and the rotation driving side is a sprocket. 20. The sludge attracting device according to claim 18, wherein the rotation driving side is a rubber wheel, and the rotation side is rotationally driven while the wheel is in contact with the receiving side. 21. The sludge attracting device according to claim 16, wherein a conductive cord from the submersible motor is guided to the outside of the pond through a rotary joint. 22. The sludge scraping device according to claim 16, wherein the scraper is a single scraper in the pond. 23. The sludge attracting device according to any one of claims 18 to 22, wherein the rake can be tilted up and down around a rotation axis of a horizontal axis. 24. A rotary rake is constructed in the rectangular sedimentation basin, and the rake is composed of a long rake body and an overrake which is linearly extendable and retractable with respect to the rake body. Device. 25. The sludge attracting device according to claim 24, wherein the overrake is constantly urged in the inner circumferential direction of the pond by a spring.