JPH10188U - Scum removal device - Google Patents

Abstract

(57) [Problem] To provide a scum removal device that ensures operation of an arm and eliminates erroneous operation. SOLUTION: In a treatment pond such as a sedimentation pond, a trough-like trough forming a flow path is fixedly provided so that a lower end of an inlet formed low on one side thereof is below the surface of the sedimentation pond. ,
A blocking member is provided on the inflow side of the trough to move up and down to block and inflow scum from the water surface, and the blocking member is interlocked vertically via an arm. In the scum removing device configured as described above, the arm is stabilized by a steadying means in a direction perpendicular to the moving direction.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention relates to a scum removal device.

[0002]

[Prior art]

 In sedimentation ponds, etc., a large amount of scum accumulates on the water surface, and it is necessary to eliminate these scums properly. As a countermeasure, various scum removal devices are considered, but in general, a tubular trough, also called a scum schema, is rotated manually or electrically and passed through an inlet on the front of the trough. In some cases, scum is introduced inside with water to eliminate it. According to this method, unless the inflow is controlled properly by manual or electric means, the inflow becomes excessively large and only water is eliminated, and the essential scum is not eliminated. Therefore, the present applicant has previously proposed a scum removing device using flight motion. In this device, a floating damming member is provided in the trough, and the damming member is pushed down via an uneven narai arm linked to the flight and a transmission mechanism responsive thereto, and the buoyancy of the damming member itself is used. It can be returned to the surface of the water.

[0003]

[Problems to be solved by the invention]

 By the way, the device is provided with an arm for vertically interlocking the damming member, but the arm swings right and left as it is, and in particular, swings left and right due to rattling due to long-term operation. It became larger and caused a malfunction. The present invention has been made to solve such a problem, and an object of the invention is to provide a scum removing device which ensures operation of an arm and eliminates malfunction.

[0004]

[MEANS FOR SOLVING THE PROBLEM] This invention has been made in order to solve the above-mentioned object. According to the invention of claim 1, a gutter-like trough forming a flow path is provided in a treatment pond such as a sedimentation pond. The lower end of the inlet, which is formed lower on the side, is fixedly provided so as to be below the water surface of the sedimentation basin. In the scum removal device configured to interlock vertically with an arm, the arm being moved in a direction perpendicular to the direction in which the arm moves. It is characterized by being stabilized by the steadying means.

[0005]

【Example】

 Hereinafter, the present invention will be described with reference to the illustrated embodiment. 1 to 3 show an embodiment of the present invention, which is directed to a circular sedimentation basin. The trough 1 has a trough-like shape with a rectangular cross section and an upper opening, and one end in the longitudinal direction is closed. The broken line in FIG. 2 shows a side wall (actually, an arc-shaped peripheral wall) A of the pond, and a support base (frame) 2 is fixed thereto. The trough 1 is fixed to the gantry 2 so as to be vertically above and below the water surface, and also serves as a support for the arms 5 and 8 described below in addition to the trough 1. The longitudinal direction of the trough 1 is oriented in the radial direction of the sedimentation basin. A communication pipe 30 is connected to the bottom of the trough 1 such that one end thereof communicates with the inside of the trough 1. The communication pipe 30 is configured to bend vertically and bend horizontally, and the end thereof is configured to allow scum and water to flow out of the pond. The water surface 31 fluctuates between a low level LWL and a high level HWL. A drive shaft and a drive motor (not shown) are provided at the center of the circular sedimentation basin with respect to the water surface 31, and the scum scraping plate 16 is driven to rotate horizontally by these drive forces. The scraper support 28 is also driven to rotate horizontally. An arm 28 'extends in front of the support 28, and a spare scraper 15 and a main scraper 18 hang from the arm 28' from the side preceding in the rotational direction. The spare scraper 15 sends some of the scum raked by the scum scraping plate 16 to the trough 1 side, and at the same time sends oily scum to the trough 1 side by a flowing water stream. The main scraper 18 serves to send all remaining scum to the trough 1 side. On the other hand, the front side, which is one side of the trough 1, is an inlet 32 which is opened so as to be lower than the water surface 31, and the lower end of the opening edge is lower than the water surface 31 of the sedimentation basin. It is provided as follows. A portion below the inlet 32 of the trough 1 is a vertical metal plate, and a U-shaped rubber connecting sheet 3 is attached to the lower end of the portion. The upper portion of the sheet 3 extends obliquely so as to rise from the horizontal plane by about 35 degrees toward the inside of the trough 1 instead of the outside. The sheet 3 is a belt-shaped sheet substantially along the longitudinal direction of the trough 1, and the upper part other than the lower mounting part is vertically elastically deformed by itself. A damming member (float) 4 having a hollow inside and a triangular cross section is attached to the upper end of the sheet 3 so as to move up and down in the trough 1. The damming member 4 is also long like the sheet 3, and is projected obliquely upward toward the inside of the trough 1 so as to move up and down on the water surface 31 by elastic support by the damming member 4. If the damming member 4 is left as it is, water may enter into the trough 1 from the gaps on both sides. Therefore, a bellows 20 is provided between the damming member 4 side and the trough 1 side. This prevents intrusion. The damming member 4 is configured to interlock so as to substantially follow the movement of the swing connection arm (one of the interlocking members) 5. That is, the rotation shaft fulcrum 6 is provided on the front water surface 31 on the inflow port 32 side of the trough 1 so that the center of the shaft is parallel to the longitudinal direction of the trough 1. The fulcrum 6 is provided at the bottom of an arm 33 extending forward from the support base 2, and the swing connection arm 5 is attached via the fulcrum 6 so as to swing up and down. The arm 5 extends from the shaft ends of the rotation shaft fulcrum 6 to the rear by passing over the trough 1 and the damming member 4 to extend rearward. The swingable portion of the swing connection arm 5 and the damming member 4 are connected so as to be able to swing up and down together. In the middle of the swingable arm 5, which is a swingable portion of the arm, an adjustment bolt 13 is attached so that the upper end is rotatable. The adjustment bolt 13 is inserted into two holes formed in the damming member 4. A nut 34 is provided at the lower end thereof so as to be vertically adjustable. An arm extends forward from one end of the shaft from the rotation shaft fulcrum 6, and a weight 10 for balance adjustment is provided at the tip of the arm. At the rear end of the swing connection arm 5, a water level tracking float 7 having an upper portion having a large diameter and an inverted conical shape is suspended. The float 7 moves up and down together with the swing connection arm 5. On the lower rear surface of the support base 2, there is provided a narai arm fulcrum 9 whose axial center parallel to the longitudinal direction of the trough 1 is located higher than the roller 12 moving in the sedimentation basin, and swings up and down through the fulcrum 9. A possible parallel arm (one of the interlocking members) 8 is supported so as to be able to swing up and down. The narai arm 8 extends forward and in a direction opposite to the direction in which the roller 12 moves from the narai arm fulcrum 9 and extends rearward and shorter. As a result, since the front portion of the narai arm 8 is unilaterally longer, the arm 8 returns downward due to the rotation moment by its own weight, and the support rod 23 extending vertically upward from the narai arm 8 is also the same. Since the moment is added to the moment, the lowering return of the parallel arm 8 is performed by the moment difference between these moments and the rotational moment of the swing connection arm 5 in the opposite direction. Note that a factor to be described later is also added to the return of the narai arm 8 to lowering. The portion extending forward of the narai arm 8 is inclined downward by about 45 degrees from the fulcrum 9 and includes a portion extending horizontally therefrom, and a portion inclined upward so as to rise forward from the horizontal portion. The tip portion is set higher than the roller 12, and the horizontal portion is set lower than the roller 12, and the portion from the tip portion to the horizontal portion is inclined downward. The cam 35 is bent in a V-shape from the tip portion to the horizontal portion. An auxiliary stability float 11 is attached to the front end of the cam 35 so as to move up and down between the cam 35 and the water surface 31. On the other hand, a portion extending rearward of the narai arm 8 is inclined upward by about 45 backward, and a rear end portion thereof is a horizontal support base 29. A hole is formed in the support base 29, and a bolt 36 of the water level following float 7 is passed through the hole. Nuts 27, 27 are provided at the lower end of the bolt 36 so as to be vertically arranged. Reference numeral 40 denotes a stopper which restricts the return of the parallel arm 8. A guide 19 (part of the frame) 19 is fixed horizontally on the upper surface of the support base 2 so as to be on the left and right. On the guide 19, the bellows 20 is covered from above to prevent aging by light. A protective cover 37 is provided. Reference numeral 23 denotes a support rod. The support rod 23 extends upward from a front portion of the narai arm 8, has a large diameter at a lower portion and a small diameter at an upper portion, and has a nut 38 at a slightly lower portion at an upper end. ing. A lower limit stopper 24 is provided on the pond side wall A, and a support rod 23 is provided on the stopper 24, and a nut 38 comes into contact with the stopper from above to define the lower limit of the parallel arm 8. The stopper 24 also serves as an anti-sway means for the arm 5, and has an elongated hole 24 a having a small width enough to guide the thin rod portion above the support bar 23 so as to be able to move up and down. Further, an insertion guide is provided on the distal end side of the parallel arm 8 so that the length can be freely adjusted, and the subsequent fixing is performed by a fixing bracket. The state shown in the drawing shows a state in which the roller 12 in the pond has not yet hit the narai arm 8. In this state, the nut 38 engages the lower limit stopper 24, and the rear part of the narai arm 8 hits the stopper at the rear part of the support base 2, so that the narai arm 8 stops in the forward lowered state. I have. In other words, the part of the narai arm 8 which is located in front of the narai arm fulcrum 9 is one-sidedly heavy, and the weights of the support rod 23 and the arm with the weight 10 are added thereto, so that the rotational moment in the opposite direction on the side of the swing connection arm 5 is reduced. The rotational moment due to the narai arm 8 or the like is always larger, and the narai arm 8 is urged in a left-down direction around the narai arm fulcrum 9 in FIG. 1, and the nut 38 engages on the lower limit stopper 24, I keep that state. Thereby, the support table 29 at the rear end is lifted, and the water level following float 7 is pushed up by the force. As a result, the swing connection arm 5 has its rear portion raised and lifts the damming member 4 via the bolt 13. Since the upper end of the damming member 4 projects beyond the water surface 31, scum and water in front of the damming member 4 are dammed. When the water surface 31 fluctuates up and down, the water level following float 7 follows it, so that the damming member 4 also fluctuates up and down. This is the water level tracking function. When the roller 12 hits the cam 35, the forearm arm 8 is moved up and down around the fulcrum 9 by the forcible force. By lowering the back, the water level following float 7 and the swing connection arm 4 are forcibly lowered, and the damming member 4 is greatly sunk below the water surface 31, so that scum and water are attracted into the trough 1. The water is discharged outside the pond through the communication pipe 30. When the roller 12 has passed the cam 35 of the horizontal arm 8, the vertical side of the vertical arm 8 is lowered and the rear side is raised, as shown in FIG. As a result, the water level following float 7 and the swing connection arm 5 also rise, and the damming member 4 rises above the water surface 31, so that the flow of scum and water is dammed. When the distal end of the narai arm 8 is raised, the auxiliary stability float 11 is also lifted to reach the water surface 31, and acts to push the scum on the water surface 31 in the direction of the trough 1. It also has the ability to break scum. Reference numeral 25 denotes a mountain-shaped protrusion provided on the swing connection arm 5, and reference numeral 26 denotes a protrusion provided on the bottom surface of the parallel arm 8. These projections 25 and 26 are effective when a large scum is to be attracted into the trough 1 by pressing the swinging connection arm 5 or the parallel arm 8 more deeply.

[0006]

[Effect of the invention]

 As described above, the present invention can provide a scum removing device in which the operation of the arm is ensured and the malfunction is eliminated.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is an enlarged view of a main part of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Trough 4 ... Damming member 5 ... Arm 24 ... Anti-sway means (stopper) 24a ... Slot.

Claims (1)

[Utility model registration claims] In a treatment pond such as a sedimentation basin, a trough-like trough forming a flow path is fixedly provided such that a lower end of an inlet formed low on one side thereof is below the surface of the sedimentation basin. And
A blocking member is provided on the inflow side of the trough to move up and down to block and inflow scum from the water surface, and the blocking member is interlocked vertically via an arm. In the scum removing device according to the above (1), the arm is wobbled by a wobbler in a direction orthogonal to a direction in which the arm moves.