JP3145931U - Scraping rake arm in a circular sludge tank - Google Patents

Abstract

The present invention provides a scraping rake arm in a circular sludge tank that can be assembled easily and efficiently.
A pair of left and right scraping arm bodies 3 in the shape of a rectangular plane truss composed of two arms 4 and front and rear supports 4a in combination with a number of X-shaped trusses having a rake body as a structural member; A picket fence 20 attached to an intersection of the X-shaped truss 5; an arm structure that connects a pulling arm to the scraping arm body 3 provided with the picket fence 20 and hangs one or more auxiliary rods; Assembling the scraping arm body 3 and the picket fence 20 is a pin or bolt joint, and the scraping arm body 3 and the central rotating shaft 2 are provided on a projecting piece 8 projecting from a support of the scraping arm body 3. The holes 10 are connected with bolts and nuts, and the tension arms are connected with hinges via turnbuckles.
[Selection] Figure 5

Description

  The present invention relates to a scraping rake arm in a circular sludge tank for treating wastewater and sludge such as wastewater treatment.

  In general, sewage collected from wastewater treatment is introduced into a circular sludge tank of various configurations, and the sludge settles in the tank and stays at the bottom of the tank. The settled sludge is scraped sequentially from the outer peripheral side to the inner peripheral side by a circulating rake arm, and is taken out of the tank by bringing it into the central mud collecting pit (for example, Patent Document 1). reference).

In addition, the rake arm shown in Patent Document 1 is known to have a structure in which strength is added using an arm having a rectangular cross section using a solid truss from a simple one.
JP 2005-66582 A

  By the way, the rake arm of the above-mentioned three-dimensional truss has a problem that the rigidity is increased more than necessary, the structure is excessively strong, the structure is complicated and the weight is large, the assembly work is complicated, and the three-dimensional truss cannot be efficiently and easily simplified. The truss rake arm has the disadvantage of adding more resistance than necessary to the scratching operation.

  The present invention was made by focusing on the above points, the scraping arm itself has a flat truss structure with low resistance, light weight, and efficient assembly with screws and bolts that are easy to assemble, It is an object of the present invention to provide a scraping rake arm in a circular sludge tank that can be easily assembled.

  The present invention can solve the above-described problems by including the following configuration.

(1) A rake arm that rotates on the bottom surface of the circular sludge tank is disposed below the central rotating shaft that is disposed at the center of the circular sludge tank that introduces and stores sludge and wastewater for wastewater treatment, etc. The stored liquid is stirred by a large number of picket fences standing on the rake arm, and the stored liquid is scraped from the outer peripheral side sequentially to the inner peripheral side by a large number of rake plates arranged in parallel to the lower part of the rake arm. In a circular sludge tank that is brought in and discharged outside,
A pair of left and right scraping arm bodies in the shape of a rectangular plane truss composed of two arms and front and rear supports by combining a number of X-shaped trusses having a rake body as a structural member;
A picket fence attached to the intersection of the X-shaped truss;
An arm structure that connects a pulling arm to a scraping arm body provided with the picket fence and hangs one or more auxiliary rods;
Assembling the scraping arm body and the picket fence is a pin or bolt joint,
The scraping arm body and the central rotary shaft are connected by bolts and nuts through the holes of projecting pieces projecting from the support arm of the scraping arm body, and the tension arm is connected by a hinge through a turnbuckle. As well as
A scraping rake arm in a circular sludge tank, characterized in that the scraping arm body, picket fence, and arm structure are combined with at least one of angle steel, groove steel, square pipe, and round pipe. .

  (2) The picket fence according to (1) is a scraped rake arm in a circular sludge tank, wherein the picket fence is attached to an intersection of X-shaped trusses via a seat plate.

  According to the present invention, the rotating action by the rake arm of various sludge water is smoothly performed while maintaining sufficient strength by the scraping arm body of the planar transformer structure, and is always impossible by the action of the hanging tension arm. In addition, since the connecting portion of each part is screwed with a bolt and a nut, it can be easily and efficiently performed.

  Further, the scraping arm body is a rectangular flat truss having two parallel arms, a rake body, and a plurality of intersecting trusses, so that the strength can be increased and smooth rotation can be performed. .

  Moreover, since the overall weight can be reduced, it becomes a scraping arm with a structure that is easy to assemble, the weight is about 1/2 to 1/3, and the manufacturing cost is also 1/2, compared to the conventional three-dimensional truss structure. Transportation costs and site installation costs can be greatly reduced.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  In the drawings, reference numeral 1 denotes a cylindrical sludge tank having a bottomed cylindrical shape, and 2 denotes a central rotating shaft disposed at the center position of the tank 1 and is rotationally driven in one direction by known driving means (not shown). Reference numeral 3 denotes a pair of left and right scraping arm bodies, each of which has two parallel arms 4 and 4 and a plurality of crossed X-shaped trusses 5 supporting the two arms 4 and 4. 4 and 4a, and has a flat rectangular shape.

  A pair of projecting pieces 8, 8 projecting from the support rods 4 a, 4 a inside the scraping arm body 3 are fixed to the leg rods 7, 7 fixed to the left and right of the bottom plate 6 provided at the base of the central rotating shaft 2. The bifurcated pivot plates 9 and 9 are provided, the projecting pieces 8 and 8 are inserted into the pivot plates 9 and 9, and the so-called screw is formed by the bolt 11 and the nut 12 in the communicating hole 10. A pair of scraping arm bodies 3 can be attached to the left and right of the base of the central rotating shaft 2 by stopping (see an enlarged view of FIG. 5).

  13 is a pair of left and right latching pieces provided above the lower part of the central rotary shaft 2, 14 is a tension arm pivotally supported at the tip of the scraping arm body 3, and the hook is attached to the base end via a turnbuckle 15. A bifurcated piece 16 that can be locked with the stop piece 13 is provided, and is suspended by a so-called screw stop using a bolt 17 and a nut 18 (see an enlarged view of FIG. 5).

  Reference numeral 19 denotes a seat plate disposed at the center of the plurality of X-shaped trusses 5 of the scraping arm body 3, and 20 denotes a plurality of picket fences having base ends fixed to the seat plate 19. It is extended to a position above the pulling arm 14. Although the base end of the picket fence 20 is fixed to the seat plate 19 in the drawing, it can be attached by a hinge structure.

  Reference numeral 21 denotes an auxiliary rod, which is arranged from the middle of the tension arm 14 toward the X-shaped truss 5 of the two arms 4 and 4, and is attached by a screw stopper 22 with bolts and nuts. As shown in FIGS. 8A, 8B, and 8C, the auxiliary rod 21 can be reinforced by changing the mounting position by alternately changing the inclination direction or by increasing the number. The number of the arm bodies 3 can be freely changed according to the length of the arm body 3.

  Then, a communicating hole is provided at a crossing portion between the pulling arm 14 and the auxiliary rod 21 that crosses the picket fence 20 and is firmly fixed by a screw stop 23 using a bolt and a nut.

  Reference numeral 24 denotes a rake body that is arranged in a slanted manner at the bottom of the scraping arm body 3, and includes holes provided in the two arms 4 and 4 of the scraping arm body 3, and a rake base of the rake body 24. The holes 25 are aligned with each other and can be fixed with a screw stopper 26 using bolts and nuts, and a flat plate 27 such as rubber is suspended and fixed to the rake base 25.

  Since the rake body 24 is arranged in the inclined direction, the stored sludge liquid is transferred toward the central direction S by the rotation of the rake body 24 in the rotation direction R (see FIG. 2).

  In the figure, 28 is a supply pipe for supplying sludge liquid for wastewater treatment to the circular sludge tank 1, 29 is a cone scraper corresponding to a mud collecting pit provided at the lower part of the central rotating shaft 2, 30 is a drawn sludge pipe, 31 is Each scum pit is shown.

  According to the present invention, the scraping arm body 3, the pulling arm 14, the pit fence 20, the auxiliary rod 21 and the rake body 24 constituting the flat truss attached to the central rotating shaft 2 are all screwed with bolts and nuts. Because it is composed, it can be installed quickly and easily and efficiently, and the pair of left and right scraping arm bodies 3 that are rotationally driven are reinforced with a large number of X-shaped trusses 5, so that the concentration of sludge liquid is high, It can sufficiently handle high viscosity and can be driven smoothly.

  The scraping arm body 3, the pulling arm 14, and the picket fence 20 can be made of any desired metal, but are preferably made of an L-shaped metal as shown or a corrosion-resistant metal using a pipe.

1 shows one embodiment of a circular sludge tank equipped with a scraping rake arm according to the present invention, (a) is a schematic longitudinal side view, (b) is a plan view of the scratching rake arm. The top view which shows the attachment structure of the scraping rake arm fixed with the screw to the central rotating shaft Front view of FIG. Exploded front view of various members joined and assembled to one of the central rotating shafts Enlarged plan view of one rotating rake arm assembled and connected to the base of the central rotating shaft and the central rotating shaft of the circular portion Cross section of the rake plate attached to the bottom of the scraping rake arm Top view of seat plate showing picket fence installation (A), (b), (c) is a front view of three scratching rake arms showing different numbers of auxiliary rods installed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank 2 Center rotating shaft 3 Scraping arm body 4 Arm 4a Support rod 5 X-shaped truss 6 Bottom plate 7 Leg rod 8 Projection piece 9 Pivot plate 10 Hole 11 Bolt 12 Nut 13 Latching piece 14 Pulling arm 15 Turnbuckle 16 Forked piece 17 Bolt 18 Nut 19 Seat plate 20 Picket fence 21 Auxiliary rod 22 Screw stop 23 Screw stop 24 Rake body 25 Rake base 26 Screw stop 27 Flat plate 28 Supply pipe 29 Cornes scraper 30 Pulled sludge pipe 31 Scum pit

Claims (2)

A rake arm that rotates on the bottom surface of the circular sludge tank is installed at the bottom of the central rotary shaft that is installed at the center of the circular sludge tank that introduces sludge and sewage for wastewater treatment and stores. The stored liquid is agitated by a large number of picket fences installed, and the stored liquid is squeezed from the outer peripheral side sequentially to the inner peripheral side by a large number of rake plates arranged in parallel to the lower part of the rake arm and brought into the central mud collecting pit. And in the circular sludge tank that was made to discharge outside,
A pair of left and right scraping arm bodies in the shape of a rectangular plane truss composed of two arms and front and rear supports by combining a number of X-shaped trusses having a rake body as a structural member;
A picket fence attached to the intersection of the X-shaped truss;
An arm structure that connects a pulling arm to a scraping arm body provided with the picket fence and hangs one or more auxiliary rods;
Assembling the scraping arm body and the picket fence is a pin or bolt joint,
The scraping arm body and the central rotary shaft are connected by bolts and nuts through the holes of projecting pieces protruding from the support arm of the scraping arm body, and the tension arm is connected by a hinge through a turnbuckle. As well as
A scraping rake arm in a circular sludge tank characterized in that the scraping arm body, picket fence, and arm structure are combined with at least one of angle steel, groove steel, square pipe, and round pipe. .   The picket fence according to claim 1 is attached to an intersecting portion of the X-shaped truss via a seat plate, and a scraping rake arm in a circular sludge tank.

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