JPH10264U - Scum removal device - Google Patents

Abstract

(57) [Summary] [Object] To provide a scum removal device that has a seal structure that is inexpensive, is structurally simple, and is very easy to install. [Structure] A trough-shaped trough is fixedly installed near the water surface in a treatment pond, and an opening on one side of the trough is located below the water surface. A weir that floats and sinks is provided at the boundary, and in the scum removal device that is configured to attract or block the scum floating on the water surface into the trough by the rise and fall of the weir, the outside of the weir A side plate is provided, and between the side plate and the weir side, a side seal is provided so as to maintain a watertight state while allowing the movement of the weir by sliding operation between the side plate and the other side of the seal. It is characterized by becoming.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a scum removing device.

[0002]

[Prior art]

 In the first or final sedimentation basin, a large amount of scum accumulates on the water surface, so it is necessary to remove these efficiently. In order to remove these scums, the applicant has proposed the following scum removal device. That is, a trough-shaped trough is fixedly provided on the water surface, an opening is provided on the front side of the trough, and a weir (float) which floats and sinks at the water surface is provided on the front side. The weir is constructed so that it is linked to the up-and-down movement by the transmission arm mechanism responding to the flight circulating in the pond.

[0003]

[Problems to be solved by the invention]

 Since the removing device was formed by bending a rubber plate in a meandering shape as viewed from above, it was expensive with a special seal, and the mounting was complicated. This invention was made to solve these problems, and its purpose was to make the sealing structure inexpensive and to remove the scum so that it was structurally simple and very easy to install. It is to provide a device.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, this invention is based on the idea that a trough-shaped trough is fixedly installed near the water surface in the treatment pond, and an opening on one side of the trough is located below the water surface. The opening is provided with a weir that rises and sinks at the water surface by weir driving means, and the scum that floats on the water surface is drawn into the trough and is blocked by the rise and fall of the weir. In the removing device, a side plate is provided outside the weir, and a side seal is provided between the side plate and the weir side, and the weir of the weir is formed by sliding operation between the side and the other side of the seal. It is characterized by maintaining a watertight state while allowing exercise.

[0005]

[Action]

 Since the seal is of the sliding type as in the above-mentioned solution, the seal structure is very simple, inexpensive, and the mounting work is also easy and easy.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIGS. 1, 2, 3 and 4 show an embodiment of the present invention. In this embodiment, reference numeral 1 denotes a first or final sedimentation basin (treatment pond). The pond 1 is rectangular when viewed from above, and 2 denotes a longitudinal side wall thereof. A plurality of rotating shafts 3 ‥‥ and sprockets 4 ‥‥ are provided in the sedimentation basin 1, and two chains 5 are wrapped around the sprockets 4 ‥‥. Multiple flights 6 ‥‥ are installed.

FIG. 3 shows a part of one of the flights 6 as viewed from above. The flight 6 is provided with a chain bracket 7 for attaching the chain 5 and near the end thereof. Is provided with a shoe 8 which is guided downward while sliding on a guide rail (not shown). Furthermore, at the end of the flight 6, a roller 9 is provided for this removing device via a bracket (not shown). Only the roller 9 is provided on the left side in the traveling direction of the flight 6, and the chain bracket 7 and the shoe 8 are provided symmetrically to the left and right.

At the longitudinal end of the sedimentation basin 1, troughs 10 each having a trough-like shape with a rectangular cross section and fixed at right and left mounting brackets 11 are provided so as to be orthogonal to the longitudinal direction. The trough 10 has an opening at an upper side and an upper front side, and side plates 12 extending to the front side are attached to both ends in the longitudinal direction. The front opening is located below the water surface 15. A hole is formed in the bottom wall of the trough 10 and a communication pipe 13 for removing scum out of the pond is connected to the hole. A support shaft 14 slightly longer than the trough 10 is rotatably mounted between the side plates 12. The space between the support shaft 14 and the front wall 10a of the trough 10 is closed by a seal 16.

A hollow float 17 having a triangular cross-section at the front is fixed to the support shaft 14 at the base and is rotatable. The float 17 is a long one extending between the side plates 12. Side seals 19 are attached to both ends in the longitudinal direction of the float 17, and the seal 19 rotates together with the float 17 to rotate the respective side plates 1 on the outside. 2 slides up and down while sliding along the inner surface. The float 17 floats and sinks with the water surface 15 as a boundary, and has a function of attracting and blocking scum.

The support shaft 14 extends to both outer sides of the trough 10, and has a U-shaped support arm 20 protruding from one (or both sides) end thereof. An elongated hole 20a is formed at the tip of the arm 20.

A U-shaped cylinder bracket 22 that is vertically long and has horizontal protruding pieces at the upper and lower ends is attached to the top end of the support arm 20. The cylinder bracket 22 also serves as one arm, and forms an L-shaped arm together with the support arm 20. A long hole is also formed in the projecting piece at the lower end of the bracket 22, and a double-acting cylinder (weir driving means) 21 is attached to the upper end of the bracket 22. A rod 27 extending downward from the cylinder 21 is connected to a transmission rod 28 rotatable on a bracket 23 fixed to the outer surface of one side plate 12 of the trough 10 through the elongated hole. A manual lever 24 is provided at the upper end of the cylinder bracket 22, and an auxiliary float 25 that floats and sinks at the water surface 15 is attached from the float 17. Instead of the auxiliary float 25, an auxiliary float 26 which can be mounted on the float 17 when the float 17 is lowered may be floated above the water surface 15.

Reference numeral 30 denotes a hydraulic pump installed on a pond, which is provided on a tank 31 as a mount. The pump 30 is a manually operated pump having a manual lever 30a, and employs a commercially available pump that can suck oil from the tank 31 by repeating reciprocating operations. As shown in FIG. 4, reference numeral 32 denotes a check valve for storing pressure oil in the accumulator 33. 34 is a pressure gauge, 35 is a relief valve, and 36 is an opening / closing valve. A hydraulic control valve 37 is a two-position closed cross type, and includes a return spring 38 and a switching lever 39.

A bearing 40 is provided on the tank 31, and two bearings 42 and 43 are also provided on the gantry 41. A first shaft 44 for operating the manual lever 30a is reciprocally mounted on these bearings 40, 42, 43. A first return spring 45 and a spring receiver 46 are provided between the bearings 42 and 43. The gantry 47 is provided with a plurality of first response mechanisms 50 arranged in the longitudinal direction. The mechanism 50 includes a plurality of first levers 51 and a plurality of link chains 52. The first lever 51 swings in sequence on the shoe 8, and moves the first shaft 44 by pulling the link chain 52 to move the hydraulic pump 30 in the pressure oil generation direction. The return is made by the spring 44. Since this response is performed in the order of the levers 51 arranged in a line, the hydraulic pump 30 repeatedly generates hydraulic pressure. This hydraulic pressure is stored in the accumulator 33.

A second response mechanism 60 includes a plurality of second levers 61 and a link chain 62. A second shaft 66 is passed through two bearings 64 and 65 on a gantry 63, and a second return spring 67 is provided. And a spring receiver 68 are provided. The second shaft 66 is engaged so as to respond to the switching lever 39 of the hydraulic control valve 37. The second lever 61 is moved by the roller 9.

Reference numerals 70 and 71 denote left and right throttles, and reference numerals 72 and 73 denote left and right variable check valves. Each circuit communicates with each outlet of the control valve 37.

The shoe 8 of the flight 6 moves and makes the first lever 51 respond like an imaginary line. As a result, the link chain 52 is pulled, the first shaft 44 is moved to the left in the figure, the lever 30a is responsive, and hydraulic oil is generated by the hydraulic pump 30. This is sequentially stored in the accumulator 33. In FIG. 4, when the control valve 37 is in the straight position (when the roller 9 does not correspond to the second lever 61), the hydraulic pressure is handled by the relief valve 35. The float 17 keeps floating on the water surface.

When the roller 9 hits the second lever 61, the second shaft 66 is pulled via the link chain 62 and the switching lever 39 is switched. As a result, the control valve 37 is switched to the cross position, and the pressure oil is supplied to the upper end of the cylinder 21 through the right check valve 73. As a result, in the cylinder 21, the rod 27 is extended together with the transmission rod 28, and the reaction causes the bracket 23 as a receiving member to swing the cylinder bracket 22 with the cylinder 21 forward. At the same time, the support arm 20 is lifted upward, and the float 17 is lowered below the water surface. Note that the lowering operation of the float 17 becomes gentle due to the operation of the left diaphragm 70.

When the roller 9 passes by the second lever 61, the control valve 37 is returned to the straight position by the springs 67 and 38. As a result, pressure oil is supplied from the lower end of the cylinder 21 through the left check valve 72, and the rod 27 and the transmission rod 28 are shortened. Therefore, the support arm 20 is returned clockwise using the bracket 23 as a fixed receiving member. , The float 17 floats. This floating operation becomes gentle when the right stop 71 works. During this time, since the shoe 8 operates the first lever 51 #, pressure oil is sequentially generated through the hydraulic pump 30. When the float 17 is lowered, the auxiliary float 25 or 27 is effective, so that it is limited to a certain value by the action of the relief valve 35 and does not drop too much.

As shown in FIG. 2, a gap is formed on both sides of the trough 10, and a seal plate 74 is provided on the front side to close the gap. Reference numeral 75 in FIG. 4 denotes a lock bolt provided on the bracket 22 to prevent the float 17 from falling when the water in the treatment tank is empty or low, and regulates the rod 27 so as not to extend.

[0020]

[Effect of the invention]

 According to the present invention, it is possible to provide a scum removing device that is inexpensive in the seal structure, is structurally simple, and is very easy to mount.

[Brief description of the drawings]

FIG. 1 is an overall view of an apparatus showing an embodiment of the present invention.

FIG. 2 is a front view showing an end of the trough.

FIG. 3 is a plan view of a flight.

FIG. 4 is a system diagram showing a hydraulic circuit.

[Explanation of symbols]

 1 Treatment Pond (Sedimentation Pond) 10 Trough 12 Side Plate 15 Water Surface 17 Weir 19 Side Seal

Claims (1)

[Utility model registration claims] 1. A trough-shaped trough is fixedly installed near the water surface in a treatment pond, and an opening on one side of the trough is positioned below the water surface. In the scum removal device which is configured to attract or block the scum floating on the water surface into the trough by the rise and fall of the weir, A side plate is provided, and a side seal is provided between the side plate and the weir side to maintain a watertight state while allowing the movement of the weir by a sliding operation between the side plate and the other side of the seal. A scum removing device characterized in that: