JPH038325Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sludge scraping device for scraping and removing settled sludge in a cross-flow type rectangular settling tank or the like where water and sewage treat industrial wastewater.

BACKGROUND ART Conventionally, a Meader-type sludge scraper has been known as this type of sludge scraper. This sludge scraper is
A movable arm equipped with a scraping plate at the lower end is pivotably supported in the traveling direction on a traveling trolley that reciprocates along the longitudinal direction of the sedimentation basin. Loosen the hoisting wire that supports the arm and let the movable arm hang down so that the lower end of the scraping plate comes into sliding contact with the bottom surface. Also, for the return movement of the traveling truck, hoist the hoisting wire and lift the movable arm to scrape. A board is placed above the water surface to prevent agitation in the sedimentation basin during return movements. Therefore,
An operating device using the hoisting wire is required, which makes the entire device complicated and expensive, and the operation using the hoisting wire must be controlled in conjunction with switching the traveling direction of the traveling truck, which requires a large number of limit switches. It has many drawbacks, such as a complicated control system that is prone to breakdowns and troublesome maintenance and inspection.

Furthermore, as proposed in Utility Model Application No. 58-78109, a device has been proposed in which an arm equipped with a scraping plate is switched between the scraping position and the return position in accordance with the reciprocating movement of the cart. This device also has disadvantages, such as not only the mechanism for switching the arm position being complicated and expensive, but also that maintenance and inspection are troublesome because the arm's pivot portion is underwater.

The present invention was developed in view of the above-mentioned drawbacks of the conventional technology, and the upper part of the movable arm, which has a sludge scraping plate fixed to the lower part, is attached to a support shaft installed on a traveling trolley that reciprocates along the longitudinal direction of the sedimentation basin. By mounting the movable arm so that it can move up and down and swing freely in the direction of travel of the trolley, the scraping plate is in the scraping position when the trolley is moving forward, and when the trolley is moving back The direction of inclination of the movable arm is changed to the opposite direction, and the posture of the scraping plate can be made horizontal, eliminating the need for an operating device using a hoisting wire for the movable arm as in the past, or changing the position of the movable arm. There is no need for a complicated mechanism for switching, the device is simplified and can be manufactured at low cost, there is no need to use many limit switches, the control system is extremely simple, maintenance and inspection are easy, and it can last for a long time. The object is to provide a sludge scraping device that can be used stably.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a running trolley that is designed to reciprocate over rails 3, 3 laid on both sides of the rectangular sedimentation tank 2 in the longitudinal direction. A support shaft 4 is provided. Reference numeral 5 designates a movable arm for scraping up sludge etc. that has settled on the bottom surface 2a of the sedimentation tank 2. A roller 6 that rolls in contact with the bottom surface 2a of the sedimentation tank 2 is provided at the lower end, and a movable arm 5 is provided at the upper end. A long sliding hole 7 is provided along the longitudinal direction, and a locking rod 8 is provided to protrude upward from the upper end of the sliding hole 7. Further, on the traveling bogie 1, a restraining pin is provided at a position above both sides of the support shaft 4 in the longitudinal direction and engages with the locking rod 8 at a predetermined interval to restrict the tilting posture due to the swinging of the movable arm 5. 9a and 9b are provided, respectively. The movable arm 5 is attached with its sliding hole 7 engaged with the support shaft 4 so as to be swingable in the moving direction of the traveling trolley 1 and slidable in the length direction of the movable arm. The swing of the movable arm 5 is
When the roller 6 is in contact with the bottom surface 2a of the sedimentation tank, the locking rod 8 comes into contact with both restraining pins 9a and 9b. Further, a sludge scraping plate 10 is provided at the lower part of the movable arm 5 so that the movable arm 5 is in a substantially vertical state in an inclined position with its locking rod 8 engaged with the restraining pin 9a on the front side. It is being

Next, the operation of the device of the present invention having the above configuration will be explained. To scrape sludge, when the carriage 1 is moved (forward motion) in the direction of the solid arrow in the figure, the upper part of the movable arm 5 is pulled by the spindle 4, and the lower end with the roller 6 is moved backward. The locking rod 8 is engaged with the restraining pin 9a, and the sludge is moved forward in an inclined position as shown by the solid line in the figure. It will be pushed towards. When the raking work is completed, the traveling cart 1 is made to travel (return) in the opposite direction indicated by the chain arrow in the figure. In this case, the movable arm 5 needs to be in the opposite inclined position when moving forward, as indicated by the chain line B in the figure. Therefore, due to the backward movement of the traveling truck 1, the upper part of the movable arm 5 is moved to the support shaft 4.
However, the lower end of the movable arm 5 has a large resistance due to the accumulation of sludge on the bottom surface 2a, so it is difficult to slide, so the movable arm gradually stands up and moves back as indicated by the chain line in the figure. As the robot moves further, it assumes an inclined posture opposite to that during forward movement, as shown by the chain line B in the figure, and the locking rod 8 is engaged with the rear restraining pin 9b. The movable arm 5 is pulled by the support shaft 4 and moves as the traveling carriage 1 moves back. At this time, the raking plate 10 assumes a substantially horizontal position along the water flow of the sedimentation basin 2 due to the change in the attitude of the movable arm 5, and agitation by the raking plate 10 is largely prevented.

Note that when changing the posture of the movable arm 5, the roller 6
If it is assumed that the rollers will roll and it will be difficult to change the posture, install a braking mechanism for the rollers 6 to lock the rolling only when switching, or take other appropriate measures to prevent the rollers from running. It is only necessary that the attitude of the movable arm 5 can be automatically switched when the trolley 1 is traveling in reverse. Further, in the embodiment described above, the locking rod 8 is provided with the restraining pins 9a and 9b in order to restrict the tilted posture of the movable arm 5, but from the lower end of the movable arm 5 to the upper end of the sliding hole 7. If the length of the locking rod 8 and the restraining pins 9a and 9 are set to a length that is suitable for the predetermined inclined posture of the movable arm 5,
b may be omitted.

As explained above, the device of the present invention has a movable arm provided with a scraping plate attached to the support shaft provided on the traveling truck so that it can move up and down and swing freely in the traveling direction of the traveling truck. By switching the reciprocating motion of the trolley, the tilting position of the movable arm is automatically switched in opposite directions from a state where sludge can be scraped up to an almost horizontal state with little resistance from the scraping plate. This eliminates the need for a conventional movable arm hoisting mechanism, eliminates the need for a hoisting mechanism and a large number of limit switches for its operation, or eliminates the complicated process of switching the position of the movable arm. It is possible to provide a sludge scraping device that does not require any special mechanism, is extremely simple as a whole, is lightweight and can be manufactured at low cost, operates reliably, has few failures, and is easy to maintain and inspect.

[Brief explanation of the drawing]

The drawing is a side sectional view showing one embodiment of the device of the present invention. 1... Traveling trolley, 2... Sedimentation basin, 4... Support shaft,
5... Movable arm, 6... Roller, 7... Sliding hole, 10... Scraping plate.

Claims (1)

[Scope of utility model registration request] A movable arm with a roller in contact with the bottom of the sedimentation tank at its lower end is attached to a support shaft attached to a running cart that reciprocates along the longitudinal direction of the sedimentation tank, and the upper part of the arm is swingable in the direction of movement of the running cart. and the movable arm is slidably engaged with the movable arm in the length direction, and the traveling carriage is provided with restraining pins at positions above both sides of the support shaft that engage with the movable arm and restrict the tilted posture of the movable arm; Further, the sludge scraping device is characterized in that a sludge scraping plate is provided at the lower part of the movable arm so that the movable arm is engaged with one of the restraining pins and is in a substantially vertical state in an inclined position.