JP2002079006A - Sludge scraping equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cheaper sludge scraping equipment with a simple structure. SOLUTION: In the sludge scraping equipment, a sludge pit is formed at an end in a longitudinal direction perpendicular to a pond width and a guide rail is provided on a pond bottom in a processing pond having a precipitation action toward the longitudinal direction. A long type scraping machine body equipped with a sludge scraper advanced/retreated and driven in the longitudinal direction by a traveling roller is installed on the guide rail and the sludge scraper is arranged in a row at an interval in a forward/rearward direction, i.e., the longitudinal direction and is advanced/retreated and driven in a longer stroke than the interval. A plurality of lift guides acted so as to permit an advancement motion of the traveling roller and lift the roller at the time of retreating from a height at the time of traveling to a stage lifted by one stage are arranged on the guide rail in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge scraper applied to a treatment pond having a settling action, such as a settling pond or an aeration tank.

[0002]

2. Description of the Related Art For example, an initial or final sedimentation basin is formed in a rectangular shape, and a sludge pit is provided at a longitudinal end perpendicular to the pond width so that sludge settling on the bottom of the pond is swept down into the pit. It is composed. The present applicant has developed various types of sludge scraping devices for scraping sludge to the sludge pit side, and as one of them, has developed a sludge scraping device also called a long type. This device lays a guide rail along the longitudinal direction of the center of the pond bottom, and drives the sludge scraper with long sludge scraper forward and backward through the running roller on the guide rail, especially, The scraper body is considerably longer than the length of the guide rail, and is equipped with a number of scrapers arranged orthogonally in the front-rear direction and at regular intervals in the front-rear direction.

[0003]

Meanwhile, the conventional sludge scraper is rotatably supported by a scraper body around an axis directed in the pond width direction, so that it becomes a vertical surface when moving forward and escapes horizontally when moving backward. This switching is performed in conjunction with the pushing and pulling of a wire rope that is guided from the pond and drives the scraper body forward and backward. Therefore, there has been a tendency that the entire apparatus is structurally complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide a more inexpensive sludge scraper by simplifying the entire structure as much as possible.

[0005]

According to a first aspect of the present invention, there is provided a sludge scraping apparatus according to the first aspect of the present invention, wherein a sludge pit is formed at an end in a longitudinal direction which is a direction orthogonal to a pond width, and a sludge pit is formed. A guide rail is laid on the bottom of the active treatment pond in the longitudinal direction, and the guide rail is equipped with a long type scraping machine with a sludge scraper driven by the traveling roller in the longitudinal direction. And the sludge scraper is a sludge scraping device that is arranged in a row at an interval in the longitudinal direction and is arranged to be driven forward and backward with a stroke longer than the interval, On the guide rail, a plurality of lift guides are arranged in the longitudinal direction that operate to allow the traveling roller to move forward and lift the roller at the time of retreat to a level one step higher than the traveling height. And said that you are.

In the sludge scraping apparatus according to the second aspect of the present invention, a sludge pit is formed at an end in a longitudinal direction perpendicular to the pond width, and the sludge pit is formed on a pond bottom in a treatment pond having a sedimentation action. A guide rail is laid in the direction, and on the guide rail, a long type scraping machine with a sludge scraper driven forward and backward in the longitudinal direction by a traveling roller is provided, and the sludge scraper is disposed in the longitudinal direction. A sludge scraping device that is arranged in a row at intervals before and after, and is driven to advance and retreat with a stroke longer than the interval, wherein an upside down type is provided on the front side of the scraping machine. While the guide roller is provided, the guide rail is set at the forward end of the guide roller so that the roller is in a hanging state, and the guide rail is placed on the guide rail by the returning operation of the scraping machine. A front end guide surface for lifting and guiding the roller to lift the scraper body is formed, and at a portion corresponding to the rear of the front end guide surface of the guide rail, a concave portion for lowering the guide roller at the time of return is formed. It is characterized by being.

[0007] The invention according to claim 3 is the invention according to claim 1 or 2.
In the described sludge scraping device, the sludge scraper-equipped scraper body has a hollow portion in which the sludge scraper and / or the scraper body is hollow.

[0010] According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a column is provided on the scraping machine side including the sludge scraper, and a water column is provided via the column. A scum scraper that scrapes the scum in the direction opposite to the sludge scraping direction is provided so as to be able to float up and down at the water surface.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 (longitudinal side view), FIG. 2 (cross-sectional plan view at the pond bottom level in FIG. 1), and FIG. 3 (longitudinal sectional view in FIG. 1) show a preferred embodiment of the present invention. In the embodiment, reference numeral 1 denotes a sedimentation basin;
As shown in FIG. 2, is a rectangle when viewed from above, and is a rectangle that is long in a direction orthogonal to the pond width direction. Reference numeral 2 denotes a side wall, which is opposed in the pond width direction, and 3 is an end wall, which is opposed in the longitudinal direction. 1 is provided with a rectifying wall 5 having a large number of holes 4 through which sewage flows into the sedimentation basin 1.

The surface of the sewage that has flowed into the sedimentation basin 1 is indicated by reference numeral 6, and a pipe skimmer (scum removing device) is provided at an intermediate position in the water surface 6 in the longitudinal direction so as to cross the pond width.
An interlocking lever 9 having a cam roller 8 protrudes from the skimmer 7. 10 is an overflow weir.

Reference numeral 11 denotes a base. The base 11 extends parallel to the sludge pit 12 across the center of the pond width in the longitudinal direction of the pond as shown in FIG. It is laid down fixedly. Reference numeral 13 denotes a guide rail, which is fixed on the base 11 using an H-shaped steel with both grooves directed left and right. In addition, the pond bottom 14 is descending at a gentle angle to the left in FIG. In some cases, the base 11 is not formed, and only the guide rail 13 is laid. In this case, the sludge scraper 23 may use the standard angle material as it is or with some processing.

The guide rail 13 has an upper flange 13a and a lower flange 13b which are vertically arranged.
At the 6 places between the front and back of a, the elevator 1
Are formed as a pair on the left and right, and the front end of the guide rail 13 extending to near the pit 12 is shown in FIG.
, While the rear end of the guide rail 13 is cut vertically to form a stepped portion 16. The elevating opening 15 and the drop step 16 are provided at regular intervals before and after.
For example, it is 2.5 m before and after here, and this size may be changed to be large or small.

At the front end of the guide rail 13 and at the six locations, a pair of left and right lift guides 18 are arranged at right and left sides of FIG.
The lift guides 18 are lifted upward with a certain force or more, fall down by their own weight, and return diagonally.

Reference numeral 20 denotes a scraping machine. The scraping machine 20 is fixed to a machine body 21 formed of a long rectangular pipe and a plurality of rows at a predetermined interval in the front-rear direction orthogonal to the body 21. Are provided. The scraper receivers 22 have the same front and rear intervals as the constant intervals formed by the elevating openings 15 and the drop step portions 16. That is, the interval is l. The scraper receiver 22 is shown in FIG.
Although it is slightly shorter than the pond width as shown in the plan view of FIG. Further, although the scraper receiver 22 is provided as an angle material, another member may be used.

A sludge scraper 23 is vertically fixed to each scraper receiver 22 by a fastener or by welding. The sludge scraper 23 is a metal plate, but may have a rubber plate at its lower end.

24 are running rollers. The traveling rollers 24 are provided in a pair at right and left sides so as to roll along the left and right grooves of the guide rail 13. For example, a bracket 25 is protruded from a scraper receiver 22 which is an angle material to support the rotation. May be.

Reference numeral 26 denotes a rotating drum, which is fixed at a position on the pond facing the longitudinal direction. 27 is a sheave provided in the pond facing the longitudinal direction. The wire rope 28 is guided from the front and rear through these, and the wire rope 28
Is fixed to a rope receiver 29 protruding above the scraper body 20. The wire rope 28 and the rope receiver 29 may be connected so as to be relatively movable up and down. The rotating drum 26 may be coaxially arranged on one side of the pond for winding and unwinding.

Reference numeral 30 denotes a column, which is erected from two front and rear scraper receivers 22 at the front of the scraper body 20 and has a plurality of front and rear support bars 31 at its upper end in the width direction of the pond. The extended scum scrapers 32 are protruded.
One of the scrapers 32 presses the cam roller 8 at the return end to rotate the pipe skimmer 7 forward so as to swallow the scum. The skimmer 7 is returned by the urging means. The struts 30 are composed of a total of four pillars. For example, the struts 30 may be configured by erecting a pair of struts before and after the body 21 or may be composed of a single main pillar. When the pipe skimmer 7 is operated independently, the interlocking system from the sludge scraping device described above can be omitted and the sludge scraping device can be used alone. The scum scraper 32 may be hollow (made of a foam resin) or made of metal or resin to generate buoyancy by selecting wood or the like. The columns 30 and the support bars 31 may also generate buoyancy. These can be similarly applied to other embodiments.

The states shown in FIGS. 1, 2 and 3 show a state in which the apparatus has entered the recovery state from the return state. As shown in FIG. 1, the rotating drum 26 on the left side in the drawing is the driving side, and the rotating drum 26 on the right side is the feeding side (driven side), and the wire rope 28 is driven in the direction indicated by the arrow X in the drawing.

The traveling rollers 24 move forward while being positioned in the guide rails 13 through the elevating ports 15 and the drop step portions 16. The sludge scrapers 23 are set at the same pitch as the pitch l between the front and rear of the traveling rollers 24 and move forward with a stroke L longer than the pitch l. For example, the stroke is 2.8 to 3 m at a pitch of 2.5 m. Therefore, while traveling forward, the traveling rollers 24 hit the lift guides 18 but kick them up and move forward just before. The lift guides 18 return to the illustrated state by their own weight.

Since the sludge scrapers 23 are all fixed to the body 21, a certain sludge scraper 23 operates so as to always move forward beyond the return position of the sludge scraper 23 located on the front side. By repeatedly returning to the state 1, the sludge is taken out step by step, and the scraping sludge is dropped down into the sludge pit 12 by the last sludge scraper 23.

When the traveling rollers 24 reach the forward end shown by the phantom line in FIG. 1, the right rotating drum 26 is switched to the driving side and the left rotating drum 26 is switched to the feeding side (driven side), and the wire rope 28 It is towed in the direction of the left arrow Y in the figure to enter a return position. As a result, the traveling rollers 24 begin to climb the lift guides 18, and all of them come up on the guide rails 13, and are returned as they are, so that the traveling rollers 24 are moved up and down the opening 15 and the drop step portion. Then, the robot naturally falls through 16 and the return is completed. Therefore, during this time, the sludge scrapers 23 are lifted one step higher and returned, so that the sludge is not scraped back.

In the above embodiment, the wire rope 28 is driven to move forward and backward. However, the present invention is not limited to this. This can be similarly applied to the other embodiments. For example, a drive member such as a link that moves left and right from the left or right end wall side in FIG. 1 may be provided, and the drive member may be linked with an electric cylinder, a circulation cableway, or the like. Further, a reversible rotating underwater motor (with a speed reducer) may be mounted on the scraping body 20 so that the traveling roller 24 is interlocked. A drive member such as the link may be linked with the underwater motor. In the above-described embodiment, the number of the traveling rollers 24 is provided by the same number as the sludge scrapers 23. However, the number of the traveling rollers 24 is reduced to about half (there may be three places between the front, the rear, and the middle thereof) or less (only the front and rear). You are free to reduce. This can be similarly applied to the other embodiments.

Further, the scraper receiver 22 may be arranged in a pair up and down with the body 21 interposed therebetween.
The upper and lower scraper receivers 22 can be connected to each other to increase the strength. Further, the fuselage body 21 may be constituted by a pair of right and left angle members 33, 33 as shown in FIG. 4 instead of the square pipe as described above. In this case, the two angle members 33, 33 May be interconnected by a bottom connecting plate 34 or a top connecting plate (not shown) to reduce the weight and increase the strength. Other members such as a square pipe and a round pipe may be integrated between the angle members 33.
In FIG. 4, reference numeral 35 denotes a scraper body made of rubber. Further, as shown in FIG. 4, the entire device can be freely reinforced with the diagonal member 36.

In the above embodiment, the sludge scraper 23 is plate-shaped, but the sludge scraper 38 may be hollow as shown in FIG. In this case, if the foamed resin 39 is loaded therein, there is no possibility that water may enter. Further, the buoyancy of the sludge scraper 23 is used for operating the apparatus lightly, not for lifting the entire apparatus. Furthermore, in this case, the body 40
May be hollow.

In the above embodiment, the guide rail 13
I tried to return through the free place above,
As shown in FIG. 5, the guide rail 41 may be provided in two stages, an upper portion 41a and a lower portion 41b, so that the traveling roller 42 returns within the upper portion 41a. Since the return movement can be stabilized and the traveling roller 42 is reliably guided throughout the reciprocation, even if the sludge scraper 43 is a buoyant body as shown in FIG. For this reason, the entire device may be made a buoyant body.

In the above embodiment, the guide rail 13 is a single guide rail. However, as shown in FIG.
The 44 may be a left-right separated two-wire (twin rail) type. In this case, the guide rails 44, 44 may be separated further apart from each other, or may be further moved closer to each other, other than the illustrated one. Further, guide rails 44 may be arranged on the side walls 45. 46 is a base.

FIGS. 8 to 10 show another embodiment.
In the same embodiment, 48 is a pond bottom, 49 is a sludge pit,
On the pond bottom 48, a single (or twin, separated left and right) guide rail 50 is laid at the center in the pond width direction.

The front end of the guide rail 50 extends to the sludge pit 49, and a front switching surface 51 is formed at the end of the guide rail 50. The front switching surface 51 is obliquely lowered toward the pit 49, and is slightly inclined backward. A rear switching surface 52 is formed. The guide rail 50 has a case in which the switching recess 53 is formed by two front and rear portions as shown in the drawing, and a case in which the switching recess 52 is formed in a single rail itself (not shown) in a notch shape.

The scraping machine 54 is provided with a machine body 55 and a sludge scraper 56 integrally, and is provided with running rollers 57 at the bottom thereof. A roller provided at the front end of the body 55 is one or one pair of right and left posture switching rollers 58.
8 falls into the concave portion 53 as shown in FIG. 8 showing the process of entering the creeping posture from the return end, and is supported by the body by the other traveling rollers 57. While it is assumed that the wire rope 60 can freely move in the concave portion 53, the posture switching roller 58 is in the concave portion as shown by the imaginary line as the wire rope 60 is pulled in the direction of the arrow X (screw direction). 53 from inside to rear switching surface 52
And rolls on the guide rail 50.

The attitude changeover roller 58 is adapted to freely escape upward and roll on the guide rail 50 by the rotating arm 59. However, the rotation of the arm is stopped by an arm rotation stopper (not shown). Rotating arm 5 at height
9 may be configured to travel on the guide rail 50 with the same function as the traveling roller without being lifted further. By doing so, it is possible to arrange the leading edge of the traveling rollers 57... As shown in FIG. The operation is stable even if the device is set up.

As shown in FIG. 8, when the most advanced sludge scraper 56 comes to the sludge pit 49 with the advance of the apparatus in the X direction, the posture changeover roller 58 is moved from the top of the guide rail 50 to the front part as shown by an imaginary line. Through the switching surface 51, it hangs down in the pit direction. This is the forward end, where the wire rope 60 starts the return operation in the arrow Y direction as shown in FIG. As a result, the posture switching roller 58 rides on the front switching surface 51, and the rotating arm 59 automatically switches slightly from the vertical to slightly forward, and the roller 58 is guided by the arm stopper 63 under the angle restriction. It comes to ride on rail 50.

As a result, the scraper body 54 rises forward as shown in FIG. In this state, the attitude switching roller 58 is inclined forward from the vertical and further travels in the Y direction, so there is no possibility of returning to the counterclockwise direction in FIG.

Further, by being pulled in the Y direction, the posture switching roller 58 falls into the switching recess 53 at a point beyond the upper corner of the rear switching surface 51 as shown in FIG. When the roller 58 descends from the rear switching surface 51, the angle of the roller 58 is changed from a forward lowered state to a vertical or more backward lowered state as shown by a virtual line in FIG. Rides on the guide rail 50, and the scraping body 54 is received by the traveling rollers 57.
8 returns to the hanging state as shown in FIG. The above-described cycle is repeated from this state.

Incidentally, the front end of the running rollers 57... Is arranged slightly rearward so that it does not fall into the recess 53 even at the forward end since the guide rail 50 is a single guide roller. However, as shown in FIG.
Side rails 6 at the same height as the guide rails 50 on both sides
If the traveling roller 57 can pass on the rail 64 and the traveling roller 57 at the front end
The roller 57 can be arranged at a sufficiently forward position (that is, forward from FIG. 8) so as not to fall down. In this case, the posture switching roller 58 is connected to the side rail 6.
The roller width is made slightly narrower by passing between 4, 64 and entering the recess 53.

FIG. 12 shows another embodiment. In the embodiment shown in FIG. 11, the guide rail 50 is limited to a single guide rail, but in the embodiment shown in FIG. 12, the guide rail is firstly replaced with the main guide rail 6 for the traveling rollers 66.
7 and an attitude switching guide rail 69 for the attitude switching roller 68, and further, an attitude switching guide rail 6
It is disclosed that each of the main guide rails 67 can be a stable pair of left and right as shown by a virtual line. Also,
Although not shown, the main guide rail 67 may be a single guide rail 69 for posture switching. Incidentally, the term "one pair" means that three or a plurality of other wires are included.

On the pond bottom 71 on the sludge pit 70 side,
The attitude switching guide rails 69 are laid so as to be separated from each other by a pair of right and left sides of the center of the pond width. The attitude switching guide rail 69 is for rolling the attitude switching roller 68, and is formed as a short single rail body using an I-shaped steel, an H-shaped steel, a square pipe, or the like. A front switching surface 72 and a rear switching surface 73 are provided. The separation width of the same state switching guide rail 69 can be changed to be large or small.

On the other hand, the main guide rail 67 is for rolling the running roller 66, and is laid at the center of the pond width.
It is a long single rail body made of a shape steel, an H shape steel, a square pipe, or the like, and the upper surface thereof is a rolling surface of the running roller 66. On the main guide rail 67, an airframe main body 74 made of H or I and a square or round pipe is provided, and a plurality of sludge scrapers 75 extending right and left through the bottom surface of the main body 74 are fixedly arranged in an orthogonal manner. I have.

The sludge scraper 75 at the front end has a notch corresponding to the posture switching guide rail 69, and the other sludge scrapers 75 have cutouts corresponding to the main guide rail 67. 75 ...
Is configured to scrape sludge accumulated on the upper surfaces of the rails 69 and 67 forward when moving forward. Of course, the sludge scraper 75 may be provided with another scraper such as a rubber plate. The body 74 and each sludge scraper 75.
A reinforcing member 76 or a skew reinforcing member (not shown) as shown between the sludge scraper 75 at the front end and the body 74 can be added. Incidentally, the sludge scrapers 75...
The height may be about 1/2 or 1/3 lower than the height shown in FIG. In this case, the number of the sludge scrapers 75 may be considerably larger than that shown in FIG. The slant scraper 75 in the case of a large number of the sludge scrapers 75 is 50 mm, 100 mm, 200 mm,
mm, 500 mm, 750 mm, or around 1000 mm. The number of running rollers need not necessarily correspond to this.

The embodiment shown in FIG. 12 basically operates similarly to the embodiment shown in FIGS. 8 to 10, but the embodiment shown in FIG. 12 performs a stable forward and backward movement as described above.
The sludge scraper 75 at the rear end advances and retreats to the diagonally upper right position in FIG. 12, but since the sludge scraper 75 at the rear end is received by the traveling roller at approximately one point at the time of retreat, stable operation is possible. In order to assure the above, there may be a case where a pair of left and right guide rails is used as in the case of the posture switching guide rail 69. As shown in FIG. 12, the sludge scraped by the second and subsequent sludge scrapers 75 from the front end may accumulate at the rear end of the posture switching guide rail 69 in front of the sludge. Therefore, the posture switching guide rail 69 '
May be arranged in the same row on the main guide rail 67, and care is taken to make the widths of both guide rails 69, 67 uniform.

[0041]

Since the present invention is constructed as described above, it is possible to provide a more inexpensive sludge scraper by simplifying the entire structure as much as possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of FIG.

FIG. 3 is a vertical sectional front view of the pond of FIG. 1;

FIG. 4 is a perspective view showing another embodiment.

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

FIG. 6 is a longitudinal sectional side view showing another embodiment.

FIG. 7 is a longitudinal sectional front view showing another embodiment.

FIG. 8 is a longitudinal sectional side view showing another embodiment.

FIG. 9 is a vertical sectional side view showing a return switching state of the embodiment of FIG. 8;

10 is a vertical sectional side view showing a state immediately before the end of the return of the embodiment of FIG. 8;

FIG. 11 is a perspective view of a main part showing another embodiment.

FIG. 12 is a perspective view showing another embodiment.

[Explanation of symbols]

1 ... settling pond 12 ... sludge pit 13 ... guide rail
14 ... Ikeboko 15 ... Elevator 16 ... Dropping step 1
8. Lift guide 20 ... Scraping machine 21 ... Machine body
23 sludge scraper 24 running roller 28 wire rope 32 scum scraper 48 ikesoko 4
9 Sludge pit 50 Guide rail 51 Front switching surface 52 Rear switching surface 53 Switching recess 5
4 ... scraping machine 55 ... machine body 56 ... sludge scraper 57 ... running roller 58 ... attitude switching roller

Claims (4)

[Claims] 1. A sludge pit is formed at an end in a longitudinal direction which is a direction orthogonal to a pond width, and a guide rail is laid in a pond bottom in a treatment pond having a sedimentation action toward the longitudinal direction. The rail is equipped with a long type scraping machine with a sludge scraper driven forward and backward in the longitudinal direction by a traveling roller, and the sludge scrapers are arranged in a row at intervals in the longitudinal direction. hand,
A sludge scraping device that is driven to advance and retreat with a stroke longer than the interval, wherein the guide rail includes a traveling roller that allows the traveling roller to move forward and moves the traveling roller one step from the traveling height. A sludge scraping device, wherein a plurality of lift guides that operate to lift in an upper stage are arranged in a longitudinal direction. 2. A sludge pit is formed at an end in a longitudinal direction which is a direction perpendicular to the pond width, and a guide rail is laid in a pond bottom in a treatment pond having a sedimentation action toward the longitudinal direction. On the rail, a long type scraping machine with a sludge scraper driven forward and backward by the running roller in the longitudinal direction is provided, and the sludge scrapers are arranged in a row at intervals in the longitudinal direction. The sludge scraping device is configured to be driven to advance and retreat with a stroke longer than the interval, wherein an upside-down type guide roller is provided on the front side of the scraping machine while the guide rail is attached to the guide rail. At the forward end of the guide roller, the roller is hung down, and the guide roller is lifted and guided on the guide rail by the returning operation of the scraper, and the scraper is lifted. A slanted front end guide surface is formed, and a recess corresponding to the rear of the front end guide surface of the guide rail is formed with a recess for tilting the guide roller when returning. apparatus. 3. The sludge scraping device according to claim 1, wherein the sludge scraper equipped with a sludge scraper has a hollow portion. 4. The device according to claim 1, wherein the scraping machine side including the sludge scraper includes:
A sludge scraping device in which a support is erected and a scum scraper that rakes scum on the water surface in a direction opposite to the sludge scraping direction via the support is provided so as to be able to float up and down on the water surface.