JP2000070612A - Sludge scraping apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge scraping apparatus which is made inexpensive by simplifying its structure. SOLUTION: In a sludge scraping apparatus equipped with a machine body 12 which can move freely in the bottom part of a sludge sedimentation basin 1 by means of traveling means such as wheels 27 or endless wheels and others, a scraper 22 which is installed in the machine body scraping/non-scraping mode- convertibly, and a driving means for driving the machine body 12, the traveling means are arranged symmetrically near the sidewall 2 of the basin 1, between the traveling means, the scraper 22 is fitted freely rotatably forward/backward in a spread state, converters 36, 38, 40, 41 which can change the posture of the scraper 22 are arranged in the basin 1, and the machine body 12 can move forward/backward independent of the scraper 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sludge scraping device.

[0002]

2. Description of the Related Art For example, in a first or final sedimentation basin, a sludge scraping device is configured to scrape sludge settled on the bottom of the pond to a pit on one side of the pond to treat the sludge. Although there are various means as the means, the present applicant lays a guide rail at the bottom of the pond, drives the body with the scraper forward and backward along the guide rail, and rakes the scraper at the time of forward movement and at the time of retreat. The scraper is lifted up so as to be in a non-scraping state.

[0003]

In the past, a guide rail was installed at the center of the pond width so that the aircraft could move forward and backward along the guide rail. It was divided at least at the border. For example, if the guide rails are composed of a pair of left and right sides, a pair of left and right scrapers must be arranged laterally of the guide rails, and another scraper needs to be arranged between the two guide rails. It became extremely complicated and costly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide a sludge scraping apparatus which is structurally simplified and inexpensive.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is configured such that it can be moved forward and backward through running means such as running wheels or endless running wheels at the bottom of a treatment pond where sludge settles. A sludge scraper provided with an airframe, a scraper provided on the airframe so as to be convertible between a scraped state and a non-scraped state, and a driving unit for driving the aircraft forward and backward. The scraper is arranged near the side wall of the pond and is symmetrical to the left and right. In the pond, conversion means capable of changing the attitude of the scraper is arranged, and the airframe includes:
It is configured to be independently driven forward and backward without interlocking with the scraper.

According to a second aspect of the present invention, in the first aspect, a long pipe-shaped or shaft-shaped scraper base shaft constituting an upper portion of the scraper is provided between the left and right running means, and the shaft is provided at both ends of the base shaft. Is mounted so as to be rotatable relative to the traveling means.

According to a third aspect of the present invention, in the second aspect, a projection is provided on the outer periphery of the scraper base shaft, the projection being a contact with a converting means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 to 3 show an embodiment of the present invention. In these figures, reference numeral 1 denotes a sedimentation basin, which is the first or final sedimentation basin and covers all treatment ponds where sediment accumulates, such as an aeration tank. Things.

The sedimentation basin 1 has four walls, that is, left and right side walls 2, an inflow side wall 3 which is a side into which sewage flows, and an end wall 4 opposed thereto. Slowly declines and slopes (may not slope)
It comprises a bottom wall 5 and a pit 6 at one end thereof. Reference numeral 7 denotes a rectifying wall, and sewage flows slowly into the sedimentation basin 1 through holes in the rectifying wall 7. The sedimentation basin 1 is shown in FIG.
In FIG. 2 and FIG. 2, a considerable length is omitted at the break line XY, but the actual length in the longitudinal direction is several meters to several tens of meters, and is not particularly limited here.

In this embodiment, a guide rail 9 is laid on the bottom of the pond by connecting a U-shaped channel member in the longitudinal direction.
A pair of right and left is arranged along the immediate vicinity of the lower side. The guide rail 9 may have various geometric shapes such as, for example, a square shape, an L shape, a round shape, and a strip (which may be vertical or horizontal).

The guide rail 9 has a peripheral slope 10 on the end wall 4 side.
The other end is provided so as to be bridged over the pit 6 and is detachably fixed by a fastener as appropriate. The guide rail 9 can constitute height adjusting means such as spacers and position adjusting means in the width direction as necessary. The guide rail 9
May be other materials such as plastic, concrete and rubber.

Reference numeral 12 denotes an airframe. The airframe 12 has an H-shape as viewed from above, and has a connecting frame 13 extending longitudinally in the pond width direction.
And a side frame 14 arranged on both left and right ends in the pond longitudinal direction, and reinforcing plates 15 connecting between the connecting frame 13 and the side frame 14. Needless to say, the connecting frame 13 is a round pipe and may have another cross-sectional shape such as a U-shape, a □ -shape, or an L-shape. The side frame 14 has a U-shape,
The orientation is set so that the grooves face each other. The connection frame 14 and the side frame 14 may be configured to be detachable.

On each side frame 14, a bearing cylinder 17 having a built-in bearing (rolling type or sliding type) with respect to a completely dust type is fixed to the front and rear of the side frame 14 in the form of a horizontal shaft and left and right facing each other. . The bearing sleeves 17 may be provided outside the side frame 14. In this case, the groove of the side frame 14 may be outward.

These bearing sleeves 17 are arranged at four points when viewed from above, and are opposed to each other on the left and right sides in the shape of a round pipe long in the pond width direction and provided with lids 18 at both ends and are closed in a hollow manner. The scraper base shaft 19 is rotatably mounted by inserting end shafts 20 and 20 projecting from the respective coaxial ends into the bearings.

The scraper base shaft 19 can be of various shapes, such as a pipe as described above, an L-shaped member, a square pipe, a solid shaft, and the like. A scraper 22 is attached to the bottom side of the scraper base shaft 19 as a single sheet in the form of a plate, and the scraper 22 is provided with a reinforcing plate 23 as shown by an imaginary line in FIG.
Alternatively, bending is prevented by auxiliary means such as a receiving roller (or a plurality of rollers) 25 having a front cover 24.
However, the auxiliary means may not be provided.

The four end shafts 20 are provided with running wheels 27... As running means so as to be relatively rotatable, and are independently rolled on the guide rail 9. A projection 28 is provided on the front side (or rear side, or front and rear) of the end shafts 20.
Are provided so as to rotate together with the end shaft 20.

The protrusions 28 alternately contact upper stoppers 29 and lower stoppers 30 projecting from two places on the side frame 14, so that when the stoppers 28 contact the upper stopper 29, the scraper 22 becomes vertical. When the scraper 22 is in the scraping state and hits the lower stopper 30, the scraper 22 is leveled and is in the non-scraping state.

On the connecting frame 13 of the body 12,
A pair of left and right receiving plates 32 are protruded, and the base ends of a wire rope 33, which is one of the driving means, are connected to these receiving plates 32 so as to form a Y shape when viewed from above. . Each of the front and rear portions of the wire rope 33 passes through a sheave 34 provided at a lower portion of the inflow side wall 3 and a lower portion of the end wall 4, and a drum (a reversible rotary type) coaxial with a motor with a speed reducer which is a driving unit on the pond. ) Is wound so that winding and feeding can be alternately performed. The wire rope 33 extends vertically upward in both the front and rear sides, and is configured by combining other guide sheaves so as to be on one side of the pond. In this case,
Both drums can be coaxial, and if a clutch is attached, a single motor with a reduction gear can be used.

Left and right 1
Protruding pieces 36 are provided so as to form a pair. This protruding piece 3
Among the guide rails 6, the one in the scraping direction hits a front contact roller 38 provided on a front bracket 37 protruding toward the scraping direction side of each guide rail 9, and is converted from a forward inclination 45 ° to a rearward inclination 45 °. In the non-scraping direction, is projected from the end wall 4 and then hits a back contact roller 40 provided on the bracket 39 to be converted in the reverse relationship. And
The front and rear protruding pieces 36 can be interlocked by an interlocking link 41. Incidentally, a weight 42 that can be moved and adjusted is attached to the interlocking link 41 as shown in FIG. The weight 42 may be provided other than the link 41.

The sludge scraper constructed as described above is
The scraping / non-scratching (returning) operation is performed as follows. The state shown by the solid line in FIG. 1 to FIG.
The body 12 is pulled in the same direction by pulling the wire rope 33 in the direction of the solid arrow A. The projecting piece 36 is inclined forward and the scraper 22 is vertical. Since the projection 28 is in contact with the upper stopper 29, a scraping force is generated. When the vehicle travels as indicated by the imaginary line on the left side of FIG. 1, the front projection 36 hits the front contact roller 38, and is converted into a rearwardly inclined state. The rear protruding piece 36 is also inclined rearward via the interlocking link 41. At the same time, the front and rear scrapers 22 are horizontal, and the projection 28 hits the lower stopper 30. In this state, the weight 42 maintains this state. At this time, the drive system rotates in the reverse direction, the wire rope 33 is pulled in the direction of arrow B, and the scraper 22 returns over the sludge.

When returning to the state shown by the left virtual line in FIG. 1, the rear projecting piece 36 hits the rear contact roller 40, and the front projecting piece 36 is also converted to the forward inclined state by the interlocking link 41. At the same time, the scraper 22 becomes vertical, the weight 42 acts, and the projection 28 hits the upper stopper 29, so that the scraper 22 is brought into a scraping state. Of course, in this case, the drive system is rotated in the reverse direction, the wire rope 33 is pulled in the direction of arrow A, and the scraper 22 starts scraping.

In the above embodiment, the body 12 is moved forward and backward by the wire rope 33, but may be driven by an underwater motor. Further, the scraper 22 may be configured to be divided into a plurality of pieces such as two minutes in the pond width direction.

FIG. 4 shows an embodiment in which a front or rear contact roller is used.
A height-adjustable weight 46 is attached to the lower end of the lever 45. On the other hand, a contact roller 4
7 so that the contact roller 47 side moves backward while hitting the lever 45. The spring 48 may be provided together with or independently of the weight 46.

FIG. 5 shows an embodiment proposed to cope with the possibility that sludge may accumulate between the guide rail 9 and the peripheral slope 10 in the embodiments of FIGS. 1 to 3. The scraper 50 is provided with a side end scraper 50 rotatably around the outer end. The scraper 50 moves forward in a scraping direction by scooping with a stopper 51, while a scraping motion is performed in a non-scraping direction. You can't stop by. The lower portion of the scraper 50 is warped toward the front of the drawing, but may be a vertical plate surface. The scraper 50 preferably has a lightweight structure.

FIG. 6 shows an embodiment in which the guide rails 53 are set a little higher by receiving plates 54 arranged at intervals in the longitudinal direction so that sludge flows naturally between the receiving plates 54. ing. Note that the guide rail 53 is a round pipe, and the running wheel 55 is also formed in a concave groove shape adapted to this.

In the embodiment shown in FIG. 7, the guide rails 58 are set high by receiving plates 57.
Reference numeral 8 denotes an upper portion 59 and a lower portion 60, which are connected by a connecting plate 61. The running wheel 61 runs between the upper portion 59 and the lower portion 60.

FIG. 8 shows a U-shaped guide rail 63 set high with stays 64. Although the traveling wheel 65 can run freely in the guide rail 63, it may be run on the rail 63.

FIG. 9 shows an embodiment in which the shaft 68 of the traveling wheel 67 and the shaft 70 of the scraper 69 are located at different positions in the front and rear. In addition, as in the same embodiment, the number of the scrapers 69 may be one.
May be protruded and the contact roller 72 at the upper end thereof may be brought into contact with the fixed plate 73 on the other side to perform the conversion operation. In the present embodiment, the front and rear scrapers 69 and 74 are provided, and the rear scraper 74 does not scrape sludge accumulated near the peripheral slope 10 (see FIG. 1) on the side of the end wall 4 (see FIG. 1). Although it is configured to be scraped when the state is changed from the side to the side, the scraper 74 at the rear may be returned to the rear side while being held up by the interlocking link 41 of FIG. However, as in this embodiment, the scraper 74 is
A chain or link chain, a double link or the like, or a hanging member 75 such as a wire rope is movably suspended back and forth, and the scraper 74 itself has a scraping function in a scraping direction while the scraper 74 itself is a non-scraping device. If a shape such as a semicircle or L-shape is specified so as to make a sliding motion on the rear surface, both functions of scraping and non-cracking are exhibited. This method can also be applied to the embodiments shown in FIGS.

FIG. 10 shows a case where the body 77 is elongated in the front and rear direction, and the scraper 7 is elongated in the pond width direction as shown in FIG.
Are arranged on a guide rail 81 by means of a traveling wheel 79 and a wire rope 80, and a lever 82 from a scraper 78 is connected to an interlocking link 8.
3 is an embodiment of the present invention. Although it is set to the interval L before and after the scraper 78, the airframe 77 in this case is
If the stroke S from the position returning to the rear to the forward end exceeds L, the pit can be scraped. Although the axes of the scraper 78 and the running wheel 79 are coaxial, they may be set on different axes.

FIG. 11 shows a scum scraping device for erecting a support 85 from the body 77 and for scraping the scum on the water surface 86 to the upper end of the support 85 only to the right in the drawing. In this apparatus, the scum scraper 87 is rotatably supported so as to be converted into a scraped state and a non-scraped state at the water surface, and the posture of the scraper 87 can be changed by a front contact 88 and a rear contact. In addition, you may make it run with the traveling wheel 90 directly on the bottom wall 89 of a pond, as shown by the virtual line in the figure. This embodiment can be applied to all the embodiments after FIG.

FIG. 12 shows an airframe 94 composed of a side frame 92 and a connecting member 93 connecting between the side frames.
, A traveling wheel 95 is attached thereto, and a connecting member 93 is provided with a scraper 96. When arranging a plurality of scrapers in the front and rear, the side frame 92 is omitted, and the front and rear connecting members 93 are joined by another connecting member to form an H-shaped frame when viewed from above,
With this, the fuselage can be configured very simply.
The mounting plate 95 may be fixed in the longitudinal direction of the side frame 92 as shown by the imaginary line, and the traveling wheel 95 may be mounted by the mounting plate 95. The connecting member 93 is a round pipe, but may be a solid shaft.

FIG. 13 shows an embodiment in which no lever, interlocking link or the like is formed on the scraper. That is, the running wheels 98 are attached to the wide body 97 having a width slightly smaller than the pond width.
The body 97 can be advanced and retracted by a wire rope 99, and a front scraper 101 and a rear scraper 102 are provided on the outer periphery of a connecting member 100 connecting the left and right of the body 97. The both scrapers 101 and 102 are provided with the suspending members 103 like the rear scraper 74 in FIG. 9.
It returns to the right while sliding on the bottom wall upside down by the action of the suspending member 103. In addition, the front suspension member 103
Although the front and rear movement of the front scraper 101 is slightly increased, the rear suspension member 103 reduces the front and rear movement of the rear scraper 102 and can effectively scrape the sludge accumulated on the rear slope. 104 is a rail scraper.

[0033]

Since the present invention is constructed as described above, it is possible to provide a sludge scraping device which is structurally simplified and inexpensive.

[Brief description of the drawings]

FIG. 1 is an entire vertical sectional view of a sedimentation basin equipped with a sludge scraping device showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a schematic view showing another method of the conversion device.

FIG. 5 is a longitudinal sectional view showing an embodiment in which sludge on the outside of the guide rail is also removed.

FIG. 6 is a cross-sectional view showing an embodiment in which sludge is not accumulated on the outside of the guide rail.

FIG. 7 is a cross-sectional view showing another embodiment in which sludge does not accumulate outside the guide rail.

FIG. 8 is a cross-sectional view showing another embodiment in which sludge is not accumulated on the outside of the guide rail.

FIG. 9 is a side view showing an example in which the positions of the support shaft of the scraper and the support shaft of the traveling wheel are different from each other in the front and rear directions.

FIG. 10 is a side view showing an embodiment in which the scraper is of a double type.

FIG. 11 is a side view showing an embodiment in which a scum scraping device is combined with a sludge scraping device.

FIG. 12 is a front view showing an embodiment of a sludge scraping device with a simplified structure.

FIG. 13 is a side view showing an embodiment of a sludge scraping device in which a scraper is simplified.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Settlement pond 9 ... Guide rail 12 ... Airframe 14 ... Side frame 19 ... Scraper main shaft 22 ... Scraper 27 ... Running wheel 33 ... Wire rope 36, 38, 4
0, 41... Conversion means.

Claims (3)

[Claims] 1. An airframe that can move forward and backward through running means such as a running wheel or an endless running wheel at the bottom of a treatment pond where sludge settles, and can be converted into a scraped state and a non-scraped state by the airframe. In a sludge scraping device provided with a scraper provided in the sludge and driving means for driving the body forward and backward, the running means is disposed near the side wall of the treatment pond and is symmetrical left and right, and Between the left and right, the scraper is mounted so as to be rotatable back and forth in a single wide sheet, and conversion means capable of changing the attitude of the scraper is disposed in the treatment pond. Is a sludge scraping device that is configured to be independently driven forward and backward without interlocking with a scraper. 2. The scraper according to claim 1, further comprising a pipe-shaped or shaft-shaped long scraper base shaft constituting an upper portion of the scraper, provided between the left and right running means. Sludge scraping device mounted so that it can rotate relative to. 3. The sludge scraping device according to claim 2, wherein a projecting piece is provided on an outer periphery of the scraper base shaft.