JP2019076834A - Sludge scraper - Google Patents

Abstract

To provide a sludge scraper, which can inhibit falling of chains and flights even if a sloshing phenomenon is caused by an earthquake, at lower manufacturing costs.SOLUTION: A sludge scraper includes: return path side rails 11, each of which is provided in a manner that its longitudinal direction is set to a space between rotary shafts at a section between a driving shaft and an intermediate shaft and supports flights 3 from below; and guide shoes 33 with first protrusions, each of which is provided at the flight 3 and has a facing part 33a which faces the return path side rail 11 when the flight 3 is located between the driving shaft and the intermediate shaft and first protrusions 33b which are disposed at a side part of the return path side rail 11 so as to extend in a manner that the first protrusions 33b can get out from the return path side rail 11. The sludge scraper further includes: first guide members 43, each of which extends from an upper part of the flight 3 to the flight 3 at the section between the driving shaft and the intermediate shaft; and outward path side guide shoes 22, each of which is provided at the flight 3 and contacts with the first guide member 43 to inhibit upward swing of the flight 3.SELECTED DRAWING: Figure 2A

Description

  The present invention relates to a sludge scraper.

  In the conventional chain flight type sludge scraper, there is a risk that the chain and the flight may fall off due to a sloshing phenomenon in which stagnant water in the sedimentation tank swings due to an earthquake.

  Therefore, Japanese Patent No. 5727075 (Patent Document 1) has been proposed as a background art of the present technical field. In this publication, "the return path side guide shoe for guiding the flight disposed in the chain flight type sludge scraper along the return path guide rail, the width of the sliding surface of the return path guide shoe relative to the return path guide rail The guide plate has projections at opposite ends in the direction of the head, and faces opposite to each other with the head of the return-side guide rail in between and between the projections above the sliding surface. It is described as “attachment” (see the summary).

JP, 5727075, A

  In the patent document 1, a guide plate is provided on the return side guide shoe of the flight, and a protrusion is provided on the guide plate, and even if the flight sways, the guide plate and the protrusion are supported by the return side guide rail to sway the flight. To prevent.

However, in the technique of Patent Document 1, the tip portions of the protrusions extending downward from both sides of the lower portion of the guide plate are bent toward the return side rail, and when assembling the sludge scraping machine, It is difficult to fit the tip of the projection into the return side rail because the head is in the way, and the manufacturing cost is increased accordingly.
Then, this invention makes it a subject to provide the sludge scraper which can suppress drop-off | omission of a chain and a flight at low manufacturing cost, even if the sloshing phenomenon by an earthquake arises.

  In order to solve the above problems, one aspect of the present invention suspends a chain attached with a plurality of flights by a plurality of rotating shafts or rotating bodies having sprocket wheels by a drive installed on the water top of a sedimentation basin. A sludge scraping machine for scraping sludge at the bottom of the sedimentation tank, which is driven to circulate, and among the plurality of rotary shafts or rotary bodies, two of the rotary shafts or rotary bodies in the vicinity of a water surface portion in the sedimentation tank. A return side rail provided in the return path section of the flight with the rotary shaft or the rotor as a longitudinal direction and supporting the flight, and a return side guide provided on the flight and supporting the flight on the return side rail When it is provided on the flight together with the shoe and the return side guide shoe, and the flight is located between the two rotating shafts or rotating bodies, A guide shoe with a first protrusion having a first protrusion which is disposed on the side opposite to the return road side rail and on the side of the return road side rail so as to extend out from the return road side rail; A first guide member extending toward the flight from an upper portion of the flight in a section between the rotating shaft or the rotating body, and an upper direction of the flight by contacting the first guide member provided on the flight. And a restraining member for restraining movement.

  According to another aspect of the present invention, there is provided a driving device installed on the top of the settling basin water, wherein a chain having a plurality of flights is attached, and one having a sprocket wheel is located on the water surface side of the settling basin. A sludge scraping machine for scraping sludge at the bottom of the sedimentation tank, which is a shaft or a rotating body, and the others are suspended by a plurality of rotating shafts or the rotating bodies disposed on the bottom side of the sedimentation tank, A return path rail provided in a section where the flight moves downward from the drive shaft toward the driven shaft on the bottom of the water and supporting the flight; and sliding on the return path rail of the flight in the flight In the section provided with the return path side guide shoe provided at the position and the return path side guide shoe in the flight and the return path side rail is provided, the return path side rail A first guide shoe with a first protrusion having a first protrusion extending out of the return side rail on the opposite side of the opposing surface and the side of the return side rail; and downward from above the sprocket wheel of the drive shaft A first guide member extending out from the first guide member, and the flight portion provided on the flight and facing the first guide member when the flight is positioned on the sprocket wheel of the drive shaft; And a second projecting guide shoe having a second projection extending straight to the side of the guide member.

ADVANTAGE OF THE INVENTION According to this invention, even if the sloshing phenomenon by an earthquake arises, the sludge scraper which can suppress drop-off | omission of a chain and a flight can be provided at low manufacturing cost.
Problems, configurations, and effects other than those described above will be apparent from the description of the embodiments below.

It is sectional drawing of the sedimentation basin provided with the sludge scraper concerning Example 1 of this invention. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning Example 1 of this invention was provided. It is BB sectional drawing of FIG. 2A. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 1 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 2 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 3 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 4 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 5 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper 1 in the position in which the return side rail concerning the modification 6 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 7 of Example 1 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning Example 2 of this invention was provided. It is CC sectional drawing of FIG. 4A. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 1 of Example 2 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 2 of Example 2 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 3 of Example 2 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 4 of Example 2 of this invention was provided. It is a cross-sectional view of the upper part of the sludge scraper in the position in which the return side rail concerning the modification 5 of Example 2 of this invention was provided. It is sectional drawing of the sedimentation basin provided with the sludge scraper concerning Example 3 of this invention. It is sectional drawing which cut | disconnected the area in which the return side rail concerning one Example 3 of this invention exists in the radial direction of the return side rail. It is the front view which looked at the drive shaft periphery concerning Example 3 of this invention from the upstream of a sedimentation basin, the downstream direction. It is AA sectional drawing of FIG. 8A.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a settling basin P provided with a sludge scraping machine 1 according to a first embodiment of the present invention. As shown in FIG. 1, the sludge scraping machine 1 of the present embodiment is a chain flight type of 4-axis arrangement, and includes a plurality of flights 3 attached to the chain 2 at predetermined intervals. The flight 3 is a plate-like member whose longitudinal direction is a direction perpendicular to the paper surface of FIG. 1 (a member having a U-shaped cross section as shown in FIG. 2B), and two chains 2 are provided in parallel. The chains 2 are attached to both sides in the longitudinal direction of the flight 3 (shown as one in FIG. 1).

  As is apparent from the following description, since the upper and lower positions of Flight 3 are reversed depending on where the chain 2 is located, when designating the vertical direction with respect to Flight 3, which position is the up and down direction? Indicates The upper and lower directions at that time are indicated by arrows in the drawing, and follow the arrows. Further, in FIG. 1, the flight 3 is provided in the entire chain 2, but for convenience, only a part of the flight 3 is illustrated.

  As shown in the figure, on the left side of the sedimentation basin P, the upstream side of the water flow, and on the right side is the downstream side. The driving device 5 is installed on the water top of the sedimentation basin P. The pair of drive sprocket wheels 4a are respectively provided on both ends of a drive shaft 4a1 serving as a rotation shaft, and the drive device 5 transmits a rotational force. The pair of driven sprocket wheels 4b is provided with the driven sprocket wheels 4b at both end sides of the intermediate shaft 4b1 disposed on the downstream side of the drive sprocket wheel 4a or at the end of the cantilever shaft. On the downstream side of the driven sprocket wheel 4b, a pair of driven sprocket wheels 4c are provided at both ends of a tail shaft 4c1 disposed near the bottom surface P2 of the sedimentation basin P or at the end of a cantilever shaft. The pair of driven sprocket wheels 4d is provided near both the bottom of the sedimentation basin P and at both ends of the head shaft 4d1 or at the end of the cantilever shaft which is disposed upstream of the driven sprocket wheel 4c. Moreover, the sludge scraping machine 1 is equipped with the screw type tensioning device (not shown) which enables the tail shaft 4c1 to horizontally move (slide movement) downstream of the sedimentation basin P. Therefore, the driven sprocket wheel 4c is illustrated in different positions by solid and broken lines. The drive shaft 4a1, the intermediate shaft 4b1, the tail shaft 4c1 and the head shaft 4d1 are supported by the side wall P3 (FIG. 2A) of the sedimentation basin P at both ends or at the end of the cantilever shaft.

  Two chains 2 in which a plurality of flights 3 are attached (crossed up) at predetermined intervals are stretched in parallel in two lines on the drive sprocket wheel 4a and the driven sprocket wheels 4b to 4d. It is driven in circulation. In addition, each rotating shaft may be comprised by the rotary body of a predetermined shape.

  Then, when the chain 2 moves along the direction of arrow F1 (direction from downstream to upstream), the sludge O deposited on the bottom of the settling basin P by the flight 3 attached to the chain 2 is a sludge pit P1. It is scraped to the side. In addition, when the chain 2 moves in the direction of arrow F2 (direction from upstream to downstream) near the water surface position of the sedimentation basin P, the scum floating on the water surface w by the flight 3 attached to the chain 2 is the scum skimmer 7 side It is scraped by and discharged. Here, as the chain 2, for example, it is desirable to use a stainless steel or synthetic resin chain or a synthetic resin notch chain. Here, in the notch chain, a recess is formed below the side portion of the chain, and the recess engages with the pin (not shown) of the drive sprocket wheel 4a and slides on the driven sprocket wheels 4b to 4d. , Notch chain is driven to circulate.

Thus, the chain 2 is driven to circulate in the direction of the arrow. Then, in the section where the flight 3 moves from the driven sprocket wheel 4c to the driven sprocket wheel 4d, the sludge O is scratched by the flight 3 and hence called "forward path", and the driven sprocket wheel 4a and the driven sprocket wheel 4b from the driven sprocket wheel 4d The section in which the flight 3 moves before reaching the driven sprocket wheel 4c is called "return path". The symbol w is the water surface of the sedimentation basin P.
On the downstream side of the sedimentation basin P and below the upper wall 201, an overflow trough 211 which is a concrete slab is provided. Overflow trough 211 is a water channel for discharging overflowed clean water.

  The drive sprocket wheel 4a and the drive shaft 4a1 of this embodiment, and the driven sprocket wheel 4b and the intermediate shaft 4b1 are located at the same depth in the water near the water surface w, and the drive shaft 4a1 and the intermediate shaft 4b1 in this return path In the section between the two, in the lower part of the flight 3, two parallel return-side rails 11 supporting the flight 3, which are rails having a longitudinal direction between the drive shaft 4a1 and the intermediate shaft 4b1. It is provided. The return side rail 11 is provided to guide and move the flight 3 on the water surface w in the section between the drive shaft 4a1 and the intermediate shaft 4b1, and to scrape the scum floating on the water surface w toward the scum skimmer 7 side. It is done.

  Further, in the vicinity of the bottom surface P2 of the sedimentation basin P, there are provided two forward path rails 12 arranged in parallel from the tail shaft 4c1 side to the head shaft 4d1 side with the direction as a longitudinal direction. The forward side rail 12 is a member for accurately guiding and moving the flight 3 moving on the forward path along the bottom surface P2, and effectively scraping out the sludge O.

  As the chain 2, for example, it is desirable to use a stainless steel or synthetic resin chain or a synthetic resin notch chain. Here, in the notch chain, a recess is formed below the side portion of the chain, and the recess engages with the pin (not shown) of the drive sprocket wheel 4a and slides on the driven sprocket wheels 4b to 4d. The circulation drive described above is performed.

  FIG. 2A is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 is provided. FIG. 2B is a B-B cut side view of FIG. 2A. The direction perpendicular to the sheet of the drawing is the upstream and downstream directions of the sedimentation basin P (the same applies to similar drawings cited below). The flight 3 is shown with the longitudinal middle portion cut away for convenience.

  In the section between the drive shaft 4a1 and the intermediate shaft 4b1, each flight 3 is, for example, U-shaped in cross section (FIG. 2B), and at its lower end, the chain 2 at a predetermined position closer to both ends than the center. It is fixed to That is, a pair of rectangular chain attachment members 21 are provided on both ends of the flight 3, and the lower portion of the flight 3 is attached to two chains via the chain attachment members 21.

  In the section between the drive shaft 4a1 and the intermediate shaft 4b1, for example, at the upper part of the position outside the chain attachment member 21 in the longitudinal direction of the flight 3 (the side wall P3 side of the sedimentation basin P) A guide shoe 22 is provided. The forward guide shoe 22 moves on the forward rail 12 when the flight 3 moves in a section between the drive shaft 4 a 1 and the intermediate shaft 4 b 1, and guides the flight 3 to the forward rail 12. Is a strengthening member against the friction of Each forward path guide shoe 22 can be formed, for example, of a material having corrosion resistance and wear resistance, such as cast iron, cast steel, stainless steel, synthetic resin and the like. In addition, the other guide shoes described below can be formed of the same material. As shown in FIG. 2B, the forward guide shoe 22 is bent in an L shape, the proximal end is fixed to the flight 3, and the distal end extends in the upstream and downstream directions of the sedimentation basin P.

  In the section between the drive shaft 4a1 and the intermediate shaft 4b1, the support member 31 which extends toward the flight 3 on both side walls P3 and whose tip reaches below the end of the flight 3 is upstream and downstream of the sedimentation basin P A plurality of them are arranged in the direction (only one is shown in FIGS. 2A and 2B). The base end portions of the plurality of support members 31 are fixed to the side walls P3 by the fixing members 35. On the side wall P3 side, the return side rail 11 is provided by being supported by a plurality of support members 31.

  In the section between the drive shaft 4a1 and the intermediate shaft 4b1, along the return path guide shoe 32 provided on the lower portion of the flight 3 and supporting the flight 3 at the upper part of the return path rail 11, and the return path guide shoe 32 A first projecting guide shoe 33 bolted to the flight 3 is provided. The return side guide shoe 32 has its proximal end fixed to the flight 3 and its distal end bent in an L shape to extend in the upstream and downstream directions of the sedimentation basin P. Each first guide shoe 33 with a projection can be pulled out from the return side rail 11 to the both sides of the return side rail 11 from the opposite end portions of the opposite portions 33a facing the return path side rail 11 and the opposite side portions 33a. And a first protrusion 33b extending to the "It is possible to come out of the return route side rail 11" means that the return route side rail 11 and the first protrusion 33b are fitted together as in the relationship between the return route side rail and the protrusion of Patent Document 1 described above. It means the condition that you can not pull it apart. In such a state, the first protrusion 33b may extend linearly as shown in FIG. 2A, or may be slightly bent to the return side rail 11 side or the opposite side. The first projecting guide shoe 33 can be formed of a corrosion resistant material such as stainless steel or synthetic resin.

  In the section between the drive shaft 4a1 and the intermediate shaft 4b1, the support member 41 which extends toward the flight 3 on both side walls P3 and whose tip reaches the end side of the flight 3 is the upstream of the sedimentation basin P A plurality of these are arranged in the downstream direction (only one is shown in FIGS. 2A and 2B). The base end portions of the plurality of support members 41 are fixed to the side walls P3 by the fixing members 42. In each side wall P <b> 3, the first guide member 43 extends from the tip of the plurality of support members 41 toward the forward guide shoe of the flight 3. The first guide member 43 is a long member supported by the tip end of the plurality of extension members 44 extending from the tip end portion of the support member 41. is there.

Next, the operation and effect of the sludge collector 1 will be described.
The sludge scraping machine 1 causes the sludge O accumulated on the bottom surface P2 of the settling basin P to be circulated on the forward path of the flight 3 by causing the chain 2 to be cyclically driven between the sprocket wheels 4a to 4d by driving the drive device 5. By moving (in the direction of the arrow F1), the sludge pit P1 can be scraped.

  When a sloshing phenomenon occurs in which the sewage in the sedimentation basin P swings due to an earthquake, the swing of the flight 3 is suppressed in the section between the drive shaft 4a1 and the intermediate shaft 4b1 as follows. That is, with reference to FIG. 2A and FIG. 2B, the rolling of the flight 3 can be locked by the return side rail 11 and the first protrusion 33b coming into contact with each other.

  Further, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the downward swing of the flight 3 is suppressed by the abutment of the return side rail 11 and the facing portion 33a. That is, the downward swing of the flight 3 can be locked by the abutment of the return side rail 11 and the facing portion 33a.

Further, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the swinging of the flight 3 to the upper side can be suppressed by the contact between the first guide member 43 and the forward guide shoe 22. That is, the upward swing of the flight 3 is locked by the contact between the first guide member 43 and the forward guide shoe 22.
Thus, even if the sloshing phenomenon occurs in the sedimentation basin P, pitching and rolling of the flight 3 are suppressed in the section between the drive shaft 4a1 and the intermediate shaft 4b1, and the flight 3 and the chain 2 are sprockets It is possible to prevent the wheels 4a to 4d from falling off.

  When the drop prevention means of the chain 2 and the flight 3 due to the sloshing phenomenon is provided in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the dropout of the chain and the flight occurs from the respective shafts 4a1 to 4d1. In particular, since the influence of the vicinity of the water surface w is large, the flight 3 is a section between the drive shaft 4a1 moving on the water surface w and the intermediate shaft 4b1.

  Here, in the technique of Patent Document 1 described above, the members corresponding to the pair of first protrusions 33b of the present embodiment are shaped so as to sandwich and hold the members corresponding to the return side rails 11 from both the left and right sides. There is. Therefore, it is difficult to fit the member corresponding to the pair of first protrusions 33 b of the present embodiment and the member corresponding to the return path side rail 11. Therefore, a large manufacturing cost is required for the work of fitting the member corresponding to the pair of first protrusions 33 b of the present embodiment and the member corresponding to the return side rail 11.

  However, in the present embodiment, the pair of first protrusions 33 b only extend toward the both sides of the return side rail 11 so as to be able to be pulled out from the return side rail 11. Therefore, the fact that the first projection 33b can be pulled out of the return side rail 11 is extremely easy to position the tip of the first projection 33b close to the side of the return side rail 11, Manufacturing cost and installation cost can be reduced. In this case, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the movement of the upper side of the flight 3 can be suppressed only by installing the first guide member 43, and the installation of the first guide member 43 is simplified Manufacturing cost and installation cost can be reduced.

Further, since the restraining member with which the first guide member 43 abuts can double as the existing forward guide shoe 22 provided in the flight 3, the manufacturing cost can be reduced also in this respect.
Of course, the suppressing member in contact with the first guide member 43 may be provided on the flight 3 separately from the forward guide shoe 22.
Furthermore, the first guide member 43 and the guide shoes 33 with the first projection and the like can be retrofitted to the existing sludge scraping machine, and the existing chain flight type sludge scraping machine can be installed in an earthquake resistant type. It can be easily remodeled into a chain flight type sludge scraper.

Modification 1 of Embodiment 1
The respective modifications described below will be described focusing on the points different from the above-described first embodiment, and the same reference numerals as the description of the first embodiment will be used for the common points, and the detailed description will be omitted. This relationship is the same in the second embodiment and each of the variations described below.
FIG. 2C is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the present modification is provided.

  The present modification is different from the first embodiment in that the second protrusion-provided guide shoes 51 are bolted to the flight 3 together with the forward guide shoes 22. When the flight 3 is located in the section between the drive shaft 4 a 1 and the intermediate shaft 4 b 1, the second guide shoe 51 with a projection has the facing portion 52 facing the first guide member 43 and the first guide member 43. A second protrusion 53 is disposed on both sides of the tip so as to extend out of the first guide member 43 so as to extend therefrom. The second projecting guide shoe 51 can be made of a corrosion resistant material such as stainless steel or synthetic resin.

  According to this modification, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the abutment of the facing portion 52 of the second protrusion-equipped guide shoe 51 with the first guide member 43 causes the flight 3 to swing upward. Can be suppressed. In addition, rolling of the flight 3 can also be suppressed by the contact between the second projection 53 and the first guide member 43. That is, in the section between the drive shaft 4 a 1 and the intermediate shaft 4 b 1, the combination of the return side rail 11 and the first projection 33 b can suppress the rolling on the lower side of the flight 3 and also the upper side of the flight 3 It is also possible to suppress the rolling. Therefore, the rolling of the flight 3 can be firmly suppressed.

In the example shown in FIG. 2C, although the two second protrusions 53 are provided on each second protrusion-provided guide shoe 51, only the second protrusion 53 on the side wall P3 side of each second protrusion-provided guide shoe 51 is used. Even if it is provided, the rolling suppression effect of the flight 3 can be exhibited.
However, as shown in FIG. 2C, by providing the two second protrusions 53 on each of the second protrusion-provided guide shoes 51, it is possible to suppress the roll of the flight 3 more firmly than in the case of one.

Modification 2 of Embodiment 1
FIG. 2D is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present variation is provided.
The present modification differs from the first embodiment in that it is a different position in the longitudinal direction of the flight 3 separately from each forward guide shoe 22, and in the section between the drive shaft 4a1 and the intermediate shaft 4b1, The pair of breakage preventing members 61 is provided at the position where The respective damage preventing members 61 face the first guide member 43, respectively. The breakage preventing member 61 can be formed of a material having corrosion resistance such as stainless steel or synthetic resin.

  Here, it is also conceivable that the first guide member 43 directly abuts the flight 3. However, in this case, the flight 3 may be damaged. Therefore, damage to the flight 3 can be prevented by providing the breakage preventing member 61 on the flight 3 and setting the installation position of the breakage preventing member 61 to the contact position with the first guide member 43.

Modification 3 of Embodiment 1
In the third to seventh modified examples of the first embodiment, although only the example in which the forward guide shoe 22 of the first embodiment is used as the suppressing member is illustrated, these modified examples are not limited thereto. The suppression member may be as in the second modification or the third modification.

  FIG. 3A is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the present modification is provided. The present modification is different from the first embodiment in the configuration of the first protrusion 33 b of the first protrusion-equipped guide shoe 33. That is, in the example of FIG. 3A, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the first protrusion 33b extends downward from the lower end both sides of each facing portion 33a, and then the tip end portion is the return side rail 11 The pair of first projections 33b are configured such that the head of the return road side rail 11 does not get out of the return road side rail 11 because the head of the return road side rail 11 interferes. Therefore, the first projection 33b abuts on the return road side rail 11, and the opposite part 33a abuts on the return road side rail 11, and in the section between the drive shaft 4a1 and the intermediate shaft 4b1, It is possible to suppress the shaking of the direction.

According to this modification, although the work of fitting the first projection 33b to the return road side rail 11 becomes complicated, the first projection 33b can also suppress the vertical swing of the flight 3 and therefore the swing of the flight 3 Suppression can be performed more strongly. That is, since the first projection 33b is not completely detached from the head of the return side rail 11, even if a strong force is applied to the flight 3, it can be easily returned to the original position of the chain 2 or the flight 3. This modification is useful when it is desired to give priority to the suppression of the fluctuation of the flight 3 rather than the reduction of the manufacturing cost of the sludge scraper 1.
In addition, since there is such a problem, it is desirable that the first protrusion 33 b be bent to such an extent that the first protrusion 33 b can be easily fitted to the return side rail 11.

[Modification 4 of Embodiment 1]
FIG. 3B is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the present variation is provided. The present modification is different from the first embodiment in the configuration of the first protrusion 33 b of the first protrusion-equipped guide shoe 33. That is, in the example of FIG. 3B, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the first protrusions 33b are respectively downward on both sides of the return side rail 11 from the lower end on both sides of the opposite portion 33a. Extending out of 11 is possible. However, among the pair of first protrusions 33 b in each of the first protrusion-provided guide shoes 33, only the one on the side wall P 3 of the sedimentation basin P is bent in an L shape toward the return road side rail.

According to this modification, only the first protrusion 33b on the side wall P3 side of the sedimentation basin P is bent in an L-shape toward the return road side rail. Therefore, in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the first guide shoe 33 with projections suppresses the vertical swing of the flight 3 with only the first protrusion 33b on the side wall P3 and the facing portion 33a. Can.
Similarly to the fourth modification, it is possible to suppress the vertical swing of the flight 3 even with the first projecting guide shoe 33. However, unlike the third modification, the work of arranging both of the first projections 33b close to each other so that the pair of first projections 33b are located on both sides of the return path side rail 11 is easy. It can be reduced.

Modification 5 of Embodiment 1
FIG. 3C is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present variation is provided. The present modification is different from the first embodiment in the configuration of the first protrusion 33 b of the first protrusion-equipped guide shoe 33. That is, in the example of FIG. 3C, only one first protrusion 33b extends from the side wall P3 side of each facing portion 33a to the side portion of the return side rail 11 and is bent in an L shape to the return side rail 11 side There is. As described above, it is possible to suppress the swing of the flight 3 in the vertical direction and the lateral direction by the first protrusion-provided guide shoes 33 only by providing the respective first protrusions 33 b with the first protrusion-provided guide shoes 33.

  According to the present embodiment, since only one first protrusion 33b is required for each first protrusion-provided guide shoe 33, the manufacturing cost of the first protrusion-provided guide shoe 33 is reduced, and the first protrusion 33b and the return-side rail 11 can be made easier to place in close proximity to each other to reduce the manufacturing cost.

Modification 6 of Embodiment 1
FIG. 3D is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the present variation is provided. The present modification is different from the first embodiment in the configuration of the first protrusion 33 b of the first protrusion-equipped guide shoe 33. That is, in the example of FIG. 3D, among the first protrusions 33b extending out from each of the first protrusion-provided guide shoes 33, only the one inside the settling basin P among the two extending from the first protrusion-provided guide shoes 33 It is bent in an L-shape on the rail 11 side. The other one first projection 33 b extends in the direction in which the pair of first projections 33 b can come out of the return side rail 11. As described above, it is possible to suppress the vibration of the flight 3 in the vertical direction of the first protrusion-provided guide shoes 33 only by the first protrusions 33 b on the inner side of the sedimentation basin P of the first protrusion-provided guide shoes 33.

  However, unlike the third modification, the work of arranging both of the first projections 33b close to each other so that the pair of first projections 33b are located on both sides of the return path side rail 11 is easy. It can be reduced.

Modification 7 of Embodiment 1
FIG. 3E is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present modification is provided. The present modification is different from the first embodiment in the configuration of the first protrusion 33 b of the first protrusion-equipped guide shoe 33. That is, in the example of FIG. 3D, only one first protrusion 33b extends inside the settling basin P of the return side rail 11 in the section between the drive shaft 4a1 and the intermediate shaft 4b1, and the tip thereof The part is bent in an L shape on the side of the return side rail 11. As described above, it is possible to suppress the vibration of the flight 3 in the vertical direction of the first protrusion-provided guide shoes 33 only by the first protrusions 33 b inside the sedimentation basin P of the first protrusion-provided guide shoes 33.

  According to the present embodiment, since only one first protrusion 33b is required for each first protrusion-provided guide shoe 33, the manufacturing cost of the first protrusion-provided guide shoe 33 is reduced, and the first protrusion 33b and the return-side rail 11 can be made easier to place in close proximity to each other to reduce the manufacturing cost.

  FIG. 4A is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the second embodiment is provided. FIG. 4B is a cross-sectional view taken along the line C-C of FIG. 4A. In the following description, points different from the first embodiment are mainly described, the same members as the first embodiment are denoted by the same reference numerals as the first embodiment, and the detailed description is omitted.

  The second embodiment differs from the first embodiment in that the second guide members 81 and the support members 31 on the left side are partially cut away for convenience. However, the above is a point provided near the side end of the flight 3 at a position close to the side wall P3. That is, the attachment member 82 is provided from the return road side rail 11, and the second guide member 81 is supported by the attachment member 82 (note that, for convenience, the right attachment member 82 is partially cut away and shown). The same applies to the following modifications.) The attachment member 82 is, for example, a member in which two L-shaped steels are joined to form an L-shape in the longitudinal direction. Further, the shape of the second guide member 81 is also different from the first embodiment, and the base end side extends upward, and the tip end side is bent in an L shape toward the side end portion side of the flight 3 (inside of sedimentation basin P). The height of the tip portion is slightly higher than the upper end edge of the return side guide shoe 32. As described above, since the second guide member 81 is supported by the attachment member 82 from the return side rail 11, the support member 41, the fixing member 42, and the extension member 44 in the first embodiment are not provided. Since the second guide member 81 is supported by the return path side rail 11 via the mounting member 82 and the return path side rail 11 is supported by the support member 31, the second guide member 81 is indirectly connected to the support member 31. It is supported.

Further, from both side ends of the flight 3, a rectangular plate-shaped protruding member 62 serving as a suppressing member protrudes toward the side wall P 3 side. The projecting member 62 may be integrally formed with the first projecting guide shoe 33 so as to project from the first projecting guide shoe 33. The height of the overhang member 62 is slightly lower than the L-shaped bent end portion of the second guide member 81. Thus, the overhanging member 62 is in close proximity to the second guide member 81 in the horizontal and vertical directions.
Next, the operation and effect of the second embodiment will be described.

  The upper portion of the overhang member 62 faces the L-shaped bent end portion of the second guide member 81 vertically, so that the flight 3 is directed upward in the section between the drive shaft 4a1 and the intermediate shaft 4b1. When it shakes, it abuts on the second guide member 81, and the upward vibration of the flight 3 can be suppressed. That is, the same action as the first guide member 43 of the first embodiment is exerted.

In addition, since the side portion of the overhang member 62 faces the proximal end portion of the second guide member 81, when the flight 3 swings in the lateral direction, it contacts the second guide member 81 and the lateral direction of the flight 3 You can control the shaking of the While the first guide member 43 of the first embodiment suppresses only the swing of the flight 3 in the upward direction in the section between the drive shaft 4a1 and the intermediate shaft 4b1, the second guide member 81 of the present embodiment The overhang member 62 can also suppress the swing of the flight 3 in the lateral direction.
Further, since the support member 41, the fixing member 42 and the extension member 44 in the first embodiment can be omitted for attaching the second guide member 81, the manufacturing cost of the sludge scraping machine 1 can be reduced by reducing the number of parts. be able to.

  Furthermore, the overhanging member 62 can be integrally formed with the first projecting guide shoe 33. In this case, the suppressing member of the second variation of the first embodiment and the third variation of the first embodiment, that is, the second protrusion-provided guide shoe 51 and the breakage preventing member 61 are separately manufactured. Since the operation of attaching to the flight 3 separately can be omitted, the manufacturing cost of the sludge scraper 1 can be reduced.

Modification of Embodiment 2
Many of the modifications of the second embodiment shown in FIGS. 5A to 5E correspond to the respective modifications of the first embodiment in many respects, and for such modifications, only the correspondence between the two is pointed out. , Detailed description is omitted.

Modification 1 of Embodiment 2
FIG. 5A is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present variation is provided. A feature of the present modification is that only one first protrusion 33 b of the first protrusion-guided guide shoe 33 is provided only on the side opposite to the side wall P 3 of each first protrusion-provided guide shoe 33. According to this modification, since only one first protrusion 33 b is provided in each of the first protrusion-provided guide shoes 33, the manufacturing cost of the sludge scraping machine 1 can be reduced.

[Modification 2 of Embodiment 2]
FIG. 5B is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present variation is provided. The present modification corresponds to the third modification of the first embodiment. Therefore, the same operation and effect as the characteristic operation and effect of the third modification of the first embodiment can be achieved.

Modification 3 of Embodiment 2
FIG. 5C is a cross-sectional view of the upper portion of the sludge collector 1 at a position where the return side rail 11 according to the present variation is provided. The present modification corresponds to the fifth modification of the first embodiment. Therefore, the same operation and effect as the characteristic operation and effect of the fifth modification of the first embodiment can be achieved.

Modification 4 of Embodiment 2
FIG. 5D is a cross-sectional view of the upper portion of the sludge collector 1 at the position where the return side rail 11 according to the present variation is provided. The present modification corresponds to the sixth modification of the first embodiment. Therefore, the same operation and effect as the characteristic operation and effect of the sixth modification of the first embodiment can be achieved.

Modification 5 of Embodiment 2
FIG. 5E is a cross-sectional view of the upper part of the sludge collector 1 at a position where the return side rail 11 according to the present modification is provided. This modification corresponds to the seventh modification of the first embodiment. Therefore, the same operation and effect as the characteristic operation and effect of the seventh modification of the first embodiment can be achieved.
In addition, although not shown, as a modification of the second embodiment, a modification including the features of the fourth modification of the first embodiment may be implemented.

  FIG. 6 is a cross-sectional view of a sedimentation basin P provided with a sludge collector 1a according to a third embodiment of the present invention. In the following description, points different from the first embodiment will be mainly described, members and the like common to the first embodiment use the same reference numerals as the first embodiment, and the detailed description will be omitted.

  As shown in FIG. 6, the sludge scraping machine 1a of the present embodiment is a chain flight type having a three-axis arrangement. Therefore, in the present embodiment, the intermediate shaft 4b1 and the driven sprocket wheel 4b are not provided, and the chain 2 and the flight 3 which have passed the drive shaft 4a1 and the drive sprocket wheel 4a are tail shafts 4c1 located near the bottom surface P2. It moves toward the driven driven sprocket wheel 4c. Therefore, a section between the tail shaft 4c1 and the head shaft 4d1 is a forward path, and a section from the head shaft 4d1 through the drive shaft 4a1 to the tail shaft 4c1 is a return path. Since the intermediate shaft 4b1 and the driven sprocket wheel 4b are not provided, the return side rail 11 is not provided. Therefore, it is not possible to scrape the scum that rises to the water surface w by flight 3. However, although not shown in FIG. 6, the forward rail 12 is provided. In addition, each rotating shaft may be comprised by the rotary body of a predetermined shape.

  The sludge scraping machine 1a of the present embodiment is provided with a pair of parallel return path rails 71 immediately below the flight 3 at a position near the tail shaft 4c1 in the section between the drive shaft 4a1 and the tail shaft 4c1.

  FIG. 7 is a cross-sectional view of the section (see FIG. 6) in which the return road side rail 71 exists, cut in the radial direction of the return road side rail 71. The return side rail 71 supports the flight 3. A return path side guide shoe 72 is provided at a position sliding on the return path side rail 71 of the flight 3. The flight 3 is provided with a return path side guide shoe 72 and a first projecting guide shoe 73 attached by a bolt. The first protrusion-guided shoe 73 extends on both sides of the opposite portion 73a facing the return road rail 71 and the return road rail 71 in a section where the return road rail 71 is provided so that the return road rail 71 can be pulled out. It has a pair of first projections 73b.

  FIG. 8A is a front view of the drive shaft 4a1 and its surroundings as viewed from the upstream and downstream directions of the sedimentation basin P. FIG. FIG. 8B is a cross-sectional view taken along line A-A of FIG. 8A. The pair of first guide members 74 extend downward from the upper side of the drive sprocket wheel 4 a of the drive shaft 4 a 1. The first guide member 74 has an arc shape so as to follow the arc shape of the drive sprocket wheel 4a at the upper portion of the drive sprocket wheel 4a. The tip is located, for example, at a position closer to the side wall P3 than the position of the drive sprocket wheel 4a. Each of the first guide members 74 is a tip end portion of a hanging portion 78 suspended from a tip end portion of each support member 77 extending horizontally inward from the fixing portion 76 fixed to each side wall P3. Each is supported by

The pair of second protrusion-provided guide shoes 75 are provided on the flight 3. When the flight 3 is positioned on the drive sprocket wheel 4 a of the drive shaft 4 a 1, the guide shoe 75 with the second projection faces the facing portion 75 a facing the first guide member 74 and both side portions of the first guide member 74. And a pair of second protrusions 75b extending to the
In FIG. 8A, the driven wheel 81 is provided on the drive shaft 4a1, and transmits the driving force of the drive device 5 to the drive shaft 4a1.

Next, the operation and effect of the sludge scraper 1a will be described.
Since the pair of first protrusions 73 b of the first protrusion-guide shoes 73 are located on both sides of the return path side rail 71, the flight 3 can be locked to prevent the flight 3 from rolling. Further, since the facing portion 73a abuts on the return side rail 71, the downward swing of the flight 3 can be suppressed in the section where the return side rail 71 exists.

  Further, on the drive sprocket wheel 4a, since the pair of second protrusions 75b is disposed close to the side portion of the tip end portion of the first guide member 74, the swing of the flight 3 can be prevented. Further, on the drive sprocket wheel 4a, since the facing portion 75a is in close proximity to the tip of the first guide member 74 thereon, the upward swing of the flight 3 can be suppressed.

Here, the falling off of the chain 2 and the flight 3 is generated from each of the shafts 4a1 to 4d1, and the influence in the vicinity of the water surface w is particularly large. Therefore, the first guide member 74 and the guide shoe 75 with the second projection are disposed on the drive sprocket wheel 4a on which the flight 3 moves on the water surface w.
Furthermore, the pair of first protrusions 73 b extend out on both sides of the return path side rail 71 so as to be able to come out of the return path side rail 71. Therefore, the operation of arranging the first projection 73b close to the return side rail 71 is also easy because the head of the return side rail 71 does not interfere with the operation, and the manufacturing cost of the sludge collector 1a can be reduced.

  Although two first protrusions 73 b and two second protrusions 75 b are provided in each of the first guide shoes 73 with protrusions and the first guide members 74, the width of the flight 3 may be one even if at least one of them is one. Shaking can be suppressed.

  The present invention is not limited to the embodiments described above, but includes various modifications. For example, the embodiments described above are described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for part of the configuration of each embodiment.

1 sludge scraper 1a sludge scraper 2 chain 3 flight 4a drive sprocket wheel (sprocket wheel)
4a1 Drive shaft (rotary shaft or rotating body)
4b to 4d driven sprocket wheel (sprocket wheel)
4b1 Intermediate shaft (rotary shaft or rotating body)
4C1 Tail shaft (Rotating shaft or rotating body)
4d1 Head axis (rotary axis or rotating body)
5 Drive device 11 return side rail 22 forward side guide shoe (suppression member)
32 Return path side guide shoe 31 Support member 33 Guide shoe with first projection 33a Counterpart 33b First projection 43 First guide member 51 Guide shoe with second projection 52 Counterpart 53 Second projection 61 Damage prevention member (suppression member)
62 Extension member (suppression member)
71 return side rail 72 return side guide shoe 73 first projection guide shoe 73a facing portion 73b first projection 74 first guide member 75 second projection guide shoe 75a opposite portion 75b second projection 81 second guide member 82 mounting member P sedimentation basin P2 bottom P3 side wall w water surface

Claims (15)

The drive installed on the water top of the sedimentation tank scrapes the sludge at the bottom of the sedimentation tank, which is suspended by a plurality of rotating shafts or rotating bodies having sprocket wheels and a chain attached with a plurality of flights. It is a sludge scraper that
The return shaft section of the flight between two rotating shafts or rotating bodies in the vicinity of a water surface portion in the settling tank among the plurality of rotating shafts or rotating bodies is provided with the rotating shafts or rotating bodies as a longitudinal direction Return side rails to support the flight,
A return side guide shoe provided on the flight and supporting the flight on the return side rail;
When the flight is provided between the two rotating shafts or rotating bodies, provided on the flight together with the return side guide shoe, an opposing portion facing the return side rail and a side portion of the return side rail A first projecting guide shoe having a first projection disposed so as to extend out from the return side rail;
A first guide member extending toward the flight from the top of the flight in a section between the two rotating shafts or rotating bodies;
And a suppressing member provided on the flight and restricting the upward movement of the flight by coming into contact with the first guide member.   The sludge squeegee according to claim 1, wherein the suppressing member is a forward guide shoe.   The restraining member is provided together with the forward guide shoe, and when the flight is positioned between the two rotary shafts or the rotating members, the restraining member faces the first guide member and the facing portion and the first guide member. The sludge scraping machine according to claim 1, characterized in that it is a second projecting guide shoe having a second projection disposed so as to extend laterally to the tip.   The sludge scraping machine according to claim 3, wherein the second protrusions are respectively located on both sides of the tip of the first guide member.   The sludge repelling apparatus according to claim 1, wherein the suppressing member is a breakage preventing member that faces the first guide member and prevents damage of the flight by the first guide member. A support member for supporting the return side rail;
The first guide member is provided on the support member and extends upward, and a tip end side is bent in an L shape toward the flight side end portion side,
The restraining member is a projecting member protruding from the first guide member toward the side wall of the sedimentation basin, and is opposed to the first guide member in the horizontal direction and the vertical direction. Sludge scraper described.   The said 1st protrusion is arrange | positioned so that it may be extended to the both sides of the said return path side rail, The sludge scraping machine as described in any one of the Claims 1 thru | or 6 characterized by the above-mentioned.   The sludge scraping machine according to any one of claims 1 to 6, wherein the first protrusion is disposed so as to extend only to the inside of the return side rail.   The first projections are disposed so as to extend on both sides of the return side rail and to have an end portion bent in an L-shape toward the return side rail. The sludge scraper according to any one of the preceding claims.   The first projections are disposed so as to extend on both sides of the return side rail and to bend only in the side wall side of the settling basin in an L shape on the return side rail side. The sludge scraping machine according to any one of Items 1 to 6.   The first projection extends only to the side wall side of the settling basin on the return side rail, and is arranged to be bent in an L shape on the return side rail side. The sludge scraper according to any one of 6.   The first projections are disposed so as to extend on both sides of the return side rail so that only the inner side of the settling basin may be bent in an L shape on the return side rail side. The sludge scraper according to any one of 6.   The first projection is disposed so that the extending end portion is bent in an L-shape toward the return side rail only at the inner side of the sedimentation basin of the return side rail. The sludge scraper according to any one of 6. Chains attached with a plurality of flights by a drive installed on the water top of the sedimentation basin, one having a sprocket wheel respectively is a rotary shaft or a rotating body located on the water surface side of the sedimentation basin, and the others are the above A sludge scraping machine for scraping sludge on the bottom of the sedimentation tank suspended and circulated and driven by a plurality of rotating shafts or rotating bodies disposed on the bottom side of the sedimentation tank,
A return side rail provided in a section in which the flight moves downward from the drive shaft to the driven shaft on the bottom of the water, and supporting the flight;
A return side guide shoe provided at a position sliding on the return side rail of the flight in the flight;
In the section provided with the return path side guide shoe in the flight, in the section where the return path side rail is provided, it extends to the side of the opposite side rail facing the return path side rail and to the side portion of the return path side rail A guide shoe with a first protrusion having a first protrusion coming out;
A first guide member extending downward from above the sprocket wheel of the drive shaft;
The flight is provided in the flight, and when the flight is positioned on the sprocket wheel of the drive shaft, the flight extends straight to the side facing the first guide member and the side of the first guide member. What is claimed is: 1. A sludge scraper comprising: a guide shoe with a second protrusion having two protrusions.   15. The sludge according to claim 14, wherein at least one of the first protrusion and the second protrusion respectively extends on both sides of the return side rail or on both sides of the tip of the first guide member. Scratching machine.

Images