JP2014161788A - Sludge scraping-up machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge scraping-up machine capable of rotating a turning arm by small driving force, and capable of executing stable operation even when a load of sludge is high.SOLUTION: The sludge scraping-up machine 1 comprises a scraping-up plate 12 for scraping up the sludge in a precipitation basin 5, a turning arm 7 for supporting the scraping-up plate 12, a ring gear 51 extending along a peripheral wall 5a of the precipitation basin 5 and connected with the turning arm 7, a sprocket wheel 60 meshing with the ring gear 51, a motor 8 for rotating the sprocket wheel 60 and a bearing mechanism 63 for rotatably supporting the ring gear 51. The ring gear 51 comprises a plurality of pins 54 arranged along its circumferential direction. The pins 54 comprise an engaging roller 54b engaging with the sprocket wheel 60 and a support rod 54a for rotatably supporting the engaging roller 54b.

Description

  The present invention relates to a sludge scraping machine that scrapes sludge settled in a sedimentation basin, and more particularly to a sludge scraping machine installed in a circular sedimentation basin.

  The sludge scraper is a device that scrapes sludge that has settled in a water treatment sedimentation basin with a scraper plate. There are two types of sludge scraper: central drive type and peripheral drive type. In the central drive type, a swivel arm is rotated by a driving device installed on a column in the center of a settling basin, and sludge is scraped by a scraping plate connected to the swivel arm. In such a centrally driven sludge scraper, the strut is subjected to the reaction force of the torque for sludge scraping, so when installing a new sludge scraper in an aged sedimentation basin, Reinforcement is required. Also, the drive device (usually a motor) used in this type of sludge scraper is large and expensive.

  The peripheral drive type sludge squeezer rotates the swivel arm by pulling the swivel arm by a cart that runs on the peripheral wall of the settling basin. This type of sludge scraper can generate a large torque with a smaller driving force. However, this type of sludge scraper needs to secure a traveling path for the carriage, and further needs to install a power supply system for the carriage. For this reason, it is difficult to change the structure of the sludge scraper from the central drive type to the peripheral drive type. In addition, when the load of sludge is high or when there is snow on the travel path, the wheels of the carriage may slip, making it difficult to ensure stable operation.

  Patent Document 2 discloses a sludge scraper that rotates a swivel arm using gears that mesh with each other. However, since these gears are disposed in water, the gears may be worn by sludge biting into the gears, resulting in a shortened life.

Japanese Patent No. 3015318 JP 2005-66582 A

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a sludge scraper that can rotate a turning arm with a small driving force and has a long life.

  In order to achieve the above-described object, a first aspect of the present invention is a sludge scraper installed in a sedimentation basin, comprising a scraping plate that scrapes the sludge in the sedimentation basin, and the scraping plate. A swivel arm to support, a ring gear extending along a peripheral wall of the settling basin, to which the swivel arm is connected, a sprocket wheel meshing with the ring gear, a drive device for rotating the sprocket wheel, and the ring gear A plurality of bearing mechanisms for rotatably supporting the ring gear, and a plurality of pins arranged along a circumferential direction of the ring gear, the pins being engaged rollers with which the sprocket wheel is engaged; And a support rod that rotatably supports the engagement roller.

In a preferred aspect of the present invention, the pin is disposed above the water surface of the settling basin.
In a preferred aspect of the present invention, the plurality of bearing mechanisms limit the horizontal movement of the ring gear, while rolling and contacting the upper and lower surfaces of the ring gear, respectively. It is characterized by providing.
In a preferred aspect of the present invention, a universal joint for connecting the swivel arm to the ring gear is further provided.
In a preferred aspect of the present invention, the universal joint is configured to be extendable and contractible in a radial direction of the ring gear.
A preferred aspect of the present invention is characterized in that a sludge extraction pipe extending upward from the center of the bottom of the settling basin and further extending to the outside of the settling basin is further provided.

  A second aspect of the present invention is a sludge scraper installed in a settling basin, a scraping plate that scrapes the sludge in the settling basin, a swivel arm that supports the scraping plate, and the settling basin A ring gear that extends along a peripheral wall of the ring gear, the sprocket wheel meshing with the ring gear, a drive device that rotates the sprocket wheel, and a plurality of bearing mechanisms that rotatably support the ring gear. The ring gear is arranged above the water surface of the sedimentation basin or on the water surface of the sedimentation basin.

In a preferred aspect of the present invention, the plurality of bearing mechanisms limit a horizontal movement of the ring gear, and a plurality of upper guide rollers and a plurality of lower guides are in rolling contact with the upper surface and the lower surface of the ring gear, respectively. A roller is provided.
In a preferred aspect of the present invention, a universal joint for connecting the swivel arm to the ring gear is further provided.
In a preferred aspect of the present invention, the universal joint is configured to be extendable and contractible in a radial direction of the ring gear.
A preferred aspect of the present invention is characterized in that a sludge extraction pipe extending upward from the center of the bottom of the settling basin and further extending to the outside of the settling basin is further provided.
In a preferred aspect of the present invention, the ring gear includes a plurality of pins arranged along a circumferential direction of the ring gear, and the pins are capable of rotating the engagement roller engaged with the sprocket wheel and the engagement roller. And a support rod for supporting.

  According to the present invention, the ring gear extending along the peripheral wall of the settling tank pulls the swivel arm to rotate the swivel arm. Therefore, the drive device that rotates the ring gear can rotate the swivel arm and the scraping plate with a small driving force. Further, unlike the conventional type in which the swing arm is pulled by a carriage, the combination of the sprocket wheel and the ring gear can reliably transmit the driving force of the drive device to the swing arm. Therefore, the sludge scraper can be operated stably.

  In particular, according to the first aspect of the present invention, the ring gear includes a rotatable engagement roller with which the sprocket wheel engages. Therefore, the sprocket wheel meshes smoothly with the ring gear, and as a result, wear of the sprocket wheel and the ring gear can be prevented. Therefore, a long-life sludge scraper is realized.

  According to the 2nd aspect of this invention, the ring gearwheel is arrange | positioned above the water surface of a sedimentation basin, or is arrange | positioned on the water surface of a sedimentation basin. Therefore, no sludge is caught between the sprocket wheel and the ring gear, and as a result, wear of the sprocket wheel and the ring gear can be prevented. Therefore, a long-life sludge scraper is realized. In addition, the ring gear can be maintained without discharging water from the settling basin. Therefore, the operating rate of the sludge scraper can be increased. Furthermore, the state of the ring gear and / or sprocket wheel can be easily confirmed visually without discharging water from the settling basin.

It is a front view of the sludge scraper according to one embodiment of the present invention. It is the figure which looked at the scraping board and turning arm which are shown in FIG. 1 from the top. It is a perspective view which shows a part of ring gear. It is sectional drawing which shows a part of ring gearwheel. It is a figure which shows a part of sludge scraper shown in FIG. 1, and is a figure which shows a drive device and a power transmission part. It is a perspective view of an upper guide roller. It is a top view of a sprocket wheel.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view of a sludge scraper according to an embodiment of the present invention. As shown in FIG. 1, the sludge scraper 1 is installed in a circular sedimentation basin 5. The sludge scraper 1 is suspended in the settling basin 5 from the swivel arm 7 disposed above the water surface of the settling basin 5, a motor 8 as a driving device for rotating the swivel arm 7, and the swivel arm 7. A suspension structure 9, a mounting frame (attachment member) 10 fixed to the lower end of the suspension structure 9, and a plurality of scraping plates 12 that scrape sludge settled on the bottom of the sedimentation basin 5 to the center of the sedimentation basin 5; It has. The swivel arm 7 extends in the radial direction of the settling basin 5 and extends in the horizontal direction. The scraping plate 12 is attached to the attachment frame 10 at a slight distance from the bottom of the sedimentation basin 5.

  FIG. 2 is a top view of the scraping plate 12 and the swing arm 7 shown in FIG. As shown in FIG. 2, each scraping plate 12 is inclined by a predetermined angle with respect to the traveling direction (direction perpendicular to the longitudinal direction of the turning arm 7). Therefore, when the swivel arm 7 rotates in the direction indicated by the arrow in FIG. 2, the scraping plate 12 scrapes the sludge on the pond bottom toward the center of the settling basin 5.

  The suspension structure 9 is a truss structure or a ramen structure composed of a plurality of suspension rods, and extends upward from the water surface of the settling basin 5. The swivel arm 7 is attached to a rotation support mechanism 15 provided at the center of the settling basin 5. The rotation support mechanism 15 includes a bearing (not shown) and rotatably supports the turning arm 7. The rotation support mechanism 15 is placed on the upper end of a support column 20 provided in the center of the settling basin 5. The turning arm 7 supported by the rotation support mechanism 15 is rotatable with respect to the support column 20.

  A sewage inflow pipe 22 for supplying sewage to the sedimentation basin 5 is connected to the lower end of the column 20. A sewage outlet 34 is provided in the upper part of the column 20. A cylindrical feed well 36 is provided around the support column 20 so as to surround the upper portion of the support column 20. The feed well 36 is arranged coaxially with the support 20. The upper end of the feed well 36 is fixed to the turning arm 7, and the feed well 36 rotates together with the turning arm 7. The sewage is supplied to the column 20 through the sewage inflow pipe 22 and introduced into the feed well 36 from the sewage outlet 34. Further, the sewage flows into the settling basin 5 through a gap between the lower portion of the feed well 36 and the support column 20.

  An annular sump 25 is provided at the center of the bottom of the settling basin 5, and sludge scraped by the scraping plate 12 is collected in the sump 25. The sump 25 is connected with a sludge extraction pipe 26 for discharging the scraped sludge. The sludge extraction pipe 26 extends from the center of the bottom of the sedimentation basin 5 to the upper side of the water surface along the support column 20 and further extends to the outside of the sedimentation basin 5. In the conventional sludge scraper as described in Patent Document 1, since the sludge extraction pipe is buried below the settling basin, it is very difficult to repair or replace the sludge extraction pipe. In this respect, since the sludge extraction pipe 26 of the present embodiment is not buried in the ground, repair and replacement are very simple.

  The sludge accumulated in the sump 25 is extracted from the sludge extraction pipe 26. A sump scraper 24 is provided in the sump 25. The sump scraper 24 is connected to the feed well 36 via a connecting frame 28, and the sump 25 rotates integrally with the feed well 36 and the swivel arm 7.

  A drainage trough 41 for discharging the supernatant water separated from the sludge is provided on the inner peripheral surface of the sedimentation basin 5. A scum blade that scrapes the scum floating on the water surface of the settling basin 5 may be fixed to the swivel arm 7. In this case, the scum is moved outward in the radial direction of the settling basin 5 by the scum blade and is put into a scum box (not shown).

  As shown in FIG. 2, a ring gear 51 is provided so as to surround the turning arm 7. The ring gear 51 extends along the peripheral wall 5 a of the sedimentation basin 5. Both ends of the swivel arm 7 are connected to a ring gear 51 via a universal joint 49, and the swivel arm 7 and the ring gear 51 are rotated together. As shown in FIG. 1, a motor 8 as a driving device is fixed to the peripheral wall 5 a of the sedimentation basin 5. A sprocket wheel 60 is fixed to the drive shaft of the motor 8, and the sprocket wheel 60 meshes with the ring gear 51.

  3 is a perspective view showing a part of the ring gear 51, FIG. 4 is a sectional view showing a part of the ring gear 51, and FIG. 5 is a view showing a part of the sludge scraper shown in FIG. is there. As shown in FIG. 3, the ring gear 51 includes an upper ring 52, a lower ring 53, and a plurality of pins 54 that connect the upper ring 52 and the lower ring 53. Each pin 54 includes a columnar support rod 54a extending between the upper ring 52 and the lower ring 53, and a cylindrical engagement roller 54b rotatably supported by the support rod 54a. The engagement roller 54b is rotatable around the support rod 54a. As shown in FIG. 5, the engagement roller 54b is disposed at the same height as the sprocket wheel 60, and the sprocket wheel 60 is engaged with the engagement roller 54b.

  The upper ring 52 and the lower ring 53 are arranged in parallel and concentric with each other. The upper end of the pin 54 is fixed to the lower surface of the upper ring 52, and the lower end of the pin 54 is fixed to the upper surface of the lower ring 53. The upper ring 52 and the lower ring 53 have substantially the same diameter, and the pins 54 are arranged at equal intervals along the circumferential direction of the upper ring 52 and the lower ring 53.

  The ring gear 51 is supported by a plurality of bearing mechanisms 63. The plurality of bearing mechanisms 63 are arranged at equal intervals along the circumferential direction of the ring gear 51. FIG. 5 shows only one bearing mechanism 63. The ring gear 51 supported by the bearing mechanism 63 is rotatable around its central axis. Each bearing mechanism 63 includes an upper guide roller 64 and a lower guide roller 65. The upper guide roller 64 and the lower guide roller 65 are rotatably supported by a horizontal shaft 66 fixed to the bracket 68, respectively. The bracket 68 is fixed to the peripheral wall 5 a of the sedimentation basin 5. Each horizontal shaft 66 extends in the radial direction of the ring gear 51, and the upper guide roller 64 and the lower guide roller 65 are rotatable around a central axis extending in the radial direction of the ring gear 51 and horizontally. .

  The upper guide roller 64 is in rolling contact with the upper surface of the ring gear 51 (that is, the upper surface of the upper ring 52), and supports the ring gear 51 from above. The lower guide roller 65 is in rolling contact with the lower surface of the ring gear 51 (that is, the lower surface of the lower ring 53), and supports the ring gear 51 from below. The upper guide roller 64 and the lower guide roller 65 are arranged at equal intervals along the circumferential direction of the ring gear 51.

  Since the upper guide roller 64 and the lower guide roller 65 have substantially the same shape, the upper guide roller 64 will be described below with reference to FIG. FIG. 6 is a perspective view of the upper guide roller 64. As shown in FIG. 6, the upper guide roller 64 includes a cylindrical portion 71 and a flange 72 formed integrally with the inner end portion of the cylindrical portion 71. The cylindrical portion 71 is in rolling contact with the upper surface of the ring gear 51 (ie, the upper surface of the upper ring 52), and the flange 72 is in contact with the side surface of the ring gear 51 (ie, the side surface of the upper ring 52). The flange 72 may be provided at the outer end portion of the cylindrical portion 71. Although not shown, the cylindrical portion of the lower guide roller 65 is in rolling contact with the lower surface of the ring gear 51 (that is, the lower surface of the lower ring 53), and the flange of the lower guide roller 65 is the side surface of the ring gear 51 (that is, the lower ring). 53 side surface).

  The upper guide roller 64 and the lower guide roller 65 arranged so as to sandwich the ring gear 51 in this way smoothly rotate the ring gear 51 while restricting the vertical and horizontal movements of the ring gear 51. Can be made. Accordingly, the sludge can be stably scraped by the rotation of the swivel arm 7 and the scraping plate 12.

  As shown in FIG. 5, the lower ring 53 of the ring gear 51 is connected to the end of the swivel arm 7 via a universal joint 49. The universal joint 49 is extendable in the radial direction of the ring gear 51 (longitudinal direction of the swivel arm 7), and allows the relative angle between the ring gear 51 and the swivel arm 7 to freely change. have. The free joint 49 configured as described above can prevent the displacement of the swivel arm 7 due to the deflection of the swivel arm 7 or the sludge load from being transmitted to the ring gear 51.

  FIG. 7 is a plan view of the sprocket wheel 60. As shown in FIG. 7, the sprocket wheel 60 has a plurality of plate-like teeth 60a extending in the radial direction. When the motor 8 rotates the sprocket wheel 60, the teeth 60 a of the sprocket wheel 60 are sequentially engaged with the engagement rollers 54 b of the ring gear 51. The torque of the motor 8 is transmitted to the ring gear 51 through the engagement between the sprocket wheel 60 and the ring gear 51, and the ring gear 51 rotates about its axis. The ring gear 51 pulls both ends of the swivel arm 7, whereby the swivel arm 7 and the scraping plate 12 supported by the swivel arm 7 via the suspension structure 9 rotate together with the ring gear 51.

  In order to scrape the sludge on the bottom of the sedimentation basin 5 with the scraping plate 12, a large torque is required. In the present embodiment, a motor 8 that is a drive source for rotating the swivel arm 7 and the scraping plate 12 is installed on the peripheral wall 5a of the settling basin 5, and the driving force of the motor 8 is a sprocket wheel 60 that meshes with each other. And transmitted to the swivel arm 7 via the ring gear 51. Since the ring gear 51 extending along the peripheral wall 5a of the settling basin 5 pulls both ends of the swivel arm 7 to rotate the swivel arm 7, the swivel arm 7 and the scraping plate 12 can be rotated with a small driving force. it can. Further, unlike the conventional type in which the swivel arm 7 is pulled by a carriage, the combination of the sprocket wheel 60 and the ring gear 51 reliably transmits the driving force of the motor 8 to the swivel arm 7. Therefore, the sludge scraper can be operated stably. Furthermore, since the position of the motor 8 is fixed, the power feeding system to the motor 8 can be simplified.

  The ring gear 51 includes a rotatable engagement roller 54b with which the sprocket wheel 60 is engaged. Therefore, the sprocket wheel 60 meshes smoothly with the ring gear 51, and as a result, wear of the sprocket wheel 60 and the ring gear 51 can be prevented. Therefore, a long-life sludge scraper is realized.

  The motor 8, the bearing mechanism 63, the sprocket wheel 60, and the ring gear 51 are disposed above the water surface. The ring gear 51 may be positioned on the water surface. More specifically, the engagement roller 54b may be positioned above the water surface, and the lower surface of the lower ring 53 may be in contact with the water surface. According to such an arrangement, sludge is not caught between the sprocket wheel 60 and the ring gear 51, and as a result, wear of the sprocket wheel 60 and the ring gear 51 can be prevented. Therefore, a long-life sludge scraper is realized. Further, the ring gear 51 can be maintained without discharging water from the sedimentation basin 5. Therefore, the operating rate of the sludge scraper can be increased. Furthermore, the state of the ring gear 51 and / or the sprocket wheel 60 can be easily confirmed visually without discharging water from the sedimentation basin 5.

Next, the operation of the sludge scraper configured as described above will be described.
When the ring gear 51 is rotated by the motor 8 via the sprocket wheel 60, the turning arm 7 rotates about the rotation support mechanism 15 in the arrow direction shown in FIG. As the swivel arm 7 rotates, the suspension structure 9 and the scraping plate 12 also rotate.

  The sewage is supplied into the sedimentation basin 5 through the sewage inflow pipe 22 and the feed well 36. The feed well 36 has a role of rectifying the sewage discharged from the sewage outlet 34. As the scraping plate 12 rotates in the direction of the arrow in FIG. 2, the sludge on the pond bottom is collected in the central direction of the settling basin 5 and collected in the sump 25. Since the sump scraper 24 rotates together with the swivel arm 7, the fluid state of the sludge in the sump 25 is maintained by the sump scraper 24. The sludge accumulated in the sump 25 is extracted through the sludge extraction pipe 26. The supernatant water separated from the sludge is discharged from the drainage trough 41.

  The suspension structure 9 exhibits the effect of a picket fence by crossing the sludge in the sedimentation basin 5. The effect of this picket fence (also referred to as a water-filling (water channel) forming effect) is an effect of increasing the concentration of sludge. That is, when the suspension structure 9 advances in the sedimentation basin 5, the sludge accumulated in the sedimentation basin 5 is cut by the suspension structure 9, and a water channel extending in the vertical direction is formed in the sludge. Since the sludge contains air bubbles, the air bubbles escape through the water channel. Thereby, the concentration property of sludge increases. If a plurality of suspension bars constituting the suspension structure 9 are arranged so as to overlap each other, the effect of the picket fence of the suspension bar is diminished. Therefore, the suspension bars constituting the suspension structure 9 are arranged so as not to overlap each other in the traveling direction so that the suspension structure 9 can exert the effect of a picket fence. Since the suspended structure 9 extends above the water surface, the suspended structure 9 can reliably cut the sludge and form a water channel even if the sludge is accumulated up to the vicinity of the water surface.

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention should not be limited to the described embodiments, but should be the widest scope according to the technical idea defined by the claims.

1 Sludge scraping machine 5 Sedimentation basin 7 Turning arm 8 Motor (drive device)
DESCRIPTION OF SYMBOLS 9 Suspension structure 10 Mounting frame 12 Scraping board 15 Rotation support mechanism 20 Support column 22 Sewage inflow pipe 24 Sump scraper 25 Sump 26 Sludge extraction pipe 28 Connection frame 34 Sewage outlet 36 Feed well 41 Drain trough 49 Universal joint 51 Ring gear 52 Upper side Ring 53 Lower ring 54 Pin 54a Support rod 54b Engagement roller 60 Sprocket wheel 63 Bearing mechanism 64 Upper guide roller 65 Lower guide roller 66 Horizontal shaft 68 Bracket 71 Cylindrical portion 72 Flange

Claims (12)

A sludge scraper installed in a sedimentation basin,
A scraping plate for scraping sludge in the sedimentation basin;
A swivel arm that supports the scraping plate;
A ring gear extending along the peripheral wall of the settling basin and connected to the swivel arm;
A sprocket wheel meshing with the ring gear;
A driving device for rotating the sprocket wheel;
A plurality of bearing mechanisms for rotatably supporting the ring gear;
The ring gear includes a plurality of pins arranged along a circumferential direction thereof.
The said pin is provided with the engaging roller which the said sprocket wheel engages, and the support rod which supports the said engaging roller rotatably, The sludge scraper characterized by the above-mentioned.   The sludge scraper according to claim 1, wherein the pin is disposed above the water surface of the sedimentation basin.   The plurality of bearing mechanisms include a plurality of upper guide rollers and a plurality of lower guide rollers that are in rolling contact with the upper surface and the lower surface of the ring gear, respectively, while restricting the horizontal movement of the ring gear. The sludge scraping machine according to claim 1 or 2.   The sludge scraper according to any one of claims 1 to 3, further comprising a universal joint that connects the swivel arm to the ring gear.   The sludge scraper according to claim 4, wherein the universal joint is configured to be extendable and contractible in a radial direction of the ring gear.   The sludge scraper according to any one of claims 1 to 5, further comprising a sludge extraction pipe extending upward from the center of the bottom of the settling basin and further extending to the outside of the settling basin. A sludge scraper installed in a sedimentation basin,
A scraping plate for scraping sludge in the sedimentation basin;
A swivel arm that supports the scraping plate;
A ring gear extending along the peripheral wall of the settling basin and connected to the swivel arm;
A sprocket wheel meshing with the ring gear;
A driving device for rotating the sprocket wheel;
A plurality of bearing mechanisms for rotatably supporting the ring gear;
The said ring gear is arrange | positioned above the water surface of the said sedimentation basin, or is arrange | positioned on the water surface of the said sedimentation basin, The sludge scraper characterized by the above-mentioned.   The plurality of bearing mechanisms include a plurality of upper guide rollers and a plurality of lower guide rollers that are in rolling contact with the upper surface and the lower surface of the ring gear, respectively, while restricting the horizontal movement of the ring gear. The sludge scraper according to claim 7.   The sludge scraper according to claim 7 or 8, further comprising a universal joint for connecting the swivel arm to the ring gear.   The sludge scraper according to claim 9, wherein the universal joint is configured to be extendable and contractible in a radial direction of the ring gear.   The sludge scraper according to any one of claims 7 to 10, further comprising a sludge extraction pipe extending upward from the center of the bottom of the settling basin and further extending to the outside of the settling basin.   The ring gear includes a plurality of pins arranged along a circumferential direction thereof, and the pins include an engagement roller with which the sprocket wheel engages and a support rod that rotatably supports the engagement roller. The sludge scraper according to any one of claims 7 to 11, further comprising:

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