JPH0576592U - Valve for scum removal device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a large flow rate with a small kick angle. [Structure] An opening for introducing the valve body is characterized in that the opening is long in the direction of the center of the rotation axis and short in the direction orthogonal thereto.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a valve for a scum removing device.

[0002]

[Prior Art]

 10 to 12 show a scum removing device previously proposed by the present inventor. In the rectangular sedimentation basin equipped with this device, a plurality of (4) sprocket shafts 200 are provided so that the axial direction is oriented in the width direction of the pond, and two sprocket shafts 200 are attached around each shaft 200. Further, a sprocket 201 and two left and right chains 202 endlessly hung via the sprocket 201 are provided. The device is driven by using some or all of the flights 203 ... Attached to the chain 202 to attract and remove scum on the water surface. There is. The scum removing device includes a trough 205, a guide support sheet 206, a dam member 208, and a transmission mechanism 209. The trough 205 is a long gutter-shaped one having a square cross-sectional shape in which the upper side and the front side are partially opened, and is fixedly provided in the pond so that its longitudinal direction faces the width direction of the pond. A rotary shaft 204 is supported by the left and right ends of the trough 205 and rotates with the movement of the interlocking arm 225 at the end. Like the trough 205, the guide support sheet 206 is made of a rubber-like material having a long strip shape. The guide support sheet 206 is attached to the front side of the trough 205 in a protruding shape and can be bent up and down by elastic deformation. The dam member 208 is a long hollow member having a substantially triangular shape, is attached to the front side of the guide support sheet 206 in an overhanging manner, and is supported by the sheet 206 so as to move up and down with the water surface 207 as a boundary. It has been burned. A transmission mechanism 209 swings the dam member 208 up and down. The transmission mechanism 209 includes a support shaft 210, a drive arm 211, and an operation arm 212. The support shaft 210 is bridged across the width of the pond, and the drive arm 211 is one arm extending from one side of the support shaft 210 toward the front. The actuating arm 212 is an arm that extends toward the trough 205, which is the opposite direction to the drive arm 211, and is a single arm. A copying member 213 is provided at the tip of the drive arm 211. The copying member 213 is provided with a cam surface at the bottom, and the cam surface is a continuous cam surface with two protrusions 213a and 213c and a recess 213b between them. One of the ends of the flight (sludge attracting plate) 203 is to move the copying member 213 to interlock the driving arm 211 and the operating arm 212 and push down the dam member 207 via the rod 224 and the interlocking arm 225. It is a roller (driving unit) 214 protruding from. The roller 214 is attached by a bracket 215 provided at one end of the flight 203 on the copying member 213 side. This scum removing device operates as follows. The chain 202 is driven by driving a motor (not shown) on the pond, and the flights 203 attached to the chain 202 are gently circulated in the direction of the arrow. Flight 203 ... scrapes sludge that has settled at the bottom of the pond and guides it into the pit, and the sludge that is guided is removed outside the pond by a pump (not shown). For the flight 203 coming upward, the copying member 213 is pushed up by the roller 214 on its side. The roller 214 moves the member 213 up and down while contacting the copying member 213 in the order of the protrusion 213a, the recess 213b, and the protrusion 213c. As a result, when the roller 214 hits the protrusion 213a in the first stage, the copying member 213 and the drive arm 211 are greatly pushed up and the operation arm 212 is pushed down, and the dam member 208 is moved below the surface of the water through the rod 224 and the interlocking arm 225. It will be pushed down. At this time, the scum on the water surface, both large and small, is guided to the inside of the trough 205 as the water is sucked, and then is removed to the outside of the trough 205. When the roller 214 comes to the recess 213b, the copying member 213 and the drive arm 211 are temporarily lowered, and the operating arm 212 is moved up. As a result, the weir member 208 is below the surface of the water and slightly lifted up, and the amount of water up to that point is reduced. Since the amount of water decreases, but the speed of water increases, the suction force of the scum increases, attracting large scum and small scum, and also smoothly pulling distant scum closer. When the roller 214 comes to the protrusion 213c in the second stage, the copying member 213 and the drive arm 211 are raised again, and the actuating arm 212 is lowered. As a result, the dam member 208 is lowered, and a large amount of the drawn scum 204 is guided into the trough 205. Since the copying member 213 has a step-like shape in this manner, the process from pulling up to the suction of the scum 204 is very effective. Now, to this scum removing device, a lead-out pipe 220 is connected to the bottom of the trough 205, and the pipe 220 is connected to a communication pipe 221 provided so as to penetrate each pond. A valve 230 is provided on the outlet pipe 220. This valve 230 has a housing 231, a valve body 232, and a valve body 232, as shown in detail in FIG. 11 (the valve closed state is a broken line and the valve opened state is a phantom line) and FIG. 12 (the valve opened state is shown in cross section). The rotary shaft 233 and the lever 234 are provided. The valve 230 allows the opening of the opening 232a to coincide with the passage 231a when the lever 234 is kicked by the roller 214, thereby allowing the scum and water in the trough 205 to pass through.

[0003]

[Problems to be solved by the device]

 However, this scum removing device valve has the following drawbacks. Since the passage 231a of the housing 231 and the opening 232a of the valve body 232 are round holes, the kick angle θ is as large as about 90 degrees, and it is necessary to extend the lever 234 so that the lever 234 is long. As a result, the operation could not be stabilized, and it was a cause of trouble. This invention was made to eliminate these drawbacks.

[0004]

[Means for solving the problem]

 In order to solve the above-mentioned problem, the device according to claim 1 is fixedly provided in the sedimentation basin so that the lower part is immersed in the water surface and the upper part is above the water surface, and an opening lower than the water surface is provided. A trough shaped like a trough that is provided on the side and configured to guide the scum and water introduced through the opening to the outside, and a weir member that is vertically movable on the opening side of the trough. A rotary valve provided in a lead-out pipe connected to the trough of the scum removing device, wherein the introduction opening of the valve body has a shape long in the direction of the center of the rotation axis and short in the direction orthogonal to it. It is characterized by being.

Since the opening of the valve body is formed so as to be short in the direction rotating in one direction and long in the direction orthogonal thereto, a large flow passage can be obtained even if the kick angle is small.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 3 show an embodiment of the present invention. FIG. 1 shows the valve closed state, and the phantom line shows the valve opened state, and FIG. 2 shows the valve opened state. The valve of this embodiment is of a rotary type and is constructed in the same manner as the scum removing device in the sedimentation tank as described above. The valve includes a housing 1, a valve body 10, a lid 20, a cap 30, and a lever 40. The introduction pipe 50 of this embodiment has a round shape similar to the conventional one, the pipe 50 is provided with a flange 51 at the end, and a valve is incorporated between the pipes 50 and 50. The housing 1 is provided with flanges 2 that can be connected to the flange 51 at both ends, and is also provided with passages 3 and 3 in the front and rear. The passage 3 has a rounded end, but is gradually elongated. In the valve body 10, the opening 11 and the through hole 12 are both in a uniform shape, and as shown in FIG. 3, the valve body 10 is formed to be long in the direction of the rotating shaft 13 and short in the direction orthogonal thereto (in the direction of rotation). It is short and long in the direction orthogonal to it). Seals 14, 14 are provided between the valve body 10 and the housing 1. A seal 21 is also provided between the rotary shaft 13 and the lid 20. As shown in FIG. 3, in order to compare the conventional opening 232a indicated by a virtual line with the opening 11, the opening 11 and the opening 232a may have the same area or the opening 11 may be larger. To do. Further, as shown in FIG. 4, the shape of the opening 11 may be an elliptical shape. Furthermore, the opening 11 may have an elliptical shape. As shown in FIG. 6, by providing one preceding opening 11a on the opening side of the opening 11 and allowing the preceding opening 11a to communicate with the passage 3 first, the opening 11 as shown in FIG. Then, the water may not flow at one time, and the water may increase little by little at the beginning. This is preferable because the drainage noise is reduced. The edge of the preceding opening 11a has a function of cutting foreign matter. As shown in FIG. 7, the front opening 11a may be plural and the rear opening 11b may be provided.

Although the dam member is configured to interlock with each other by the copying member and the transmission mechanism in the above-described embodiment, the following structure may be used instead of these structures. That is, in order to move the dam member up and down, the copying member and the transmission mechanism as in the above embodiment are not provided, and the dam member 55 floats itself as shown by the broken lines in FIGS. 9 and 10. Alternatively, another float may be added to make it float so that it is always kept at a level slightly lower than the water surface 56, and it can move up and down following the water level 56. As a result, the scum on the water surface 56 is made to stay in the trough together with the water and does not flow out until the valve is actuated. This is the typical usage of the valve. The dam member is not limited to a rotating (swinging) type member, and the shape thereof is not specified, such as a plate shape, but may be a member that moves up and down in a vertical straight line or an inclined straight line. Further, the introduction pipe may have a rectangular cross section. Further, FIG. 8 shows that the trough 60 has a two-story structure of a first floor 61 and a second floor 62, and a shutter 65 that can be opened and closed by a hinge 64 is provided at an exit 63 formed in a bottom wall 61a of the first floor to open the second floor portion. It may be made to flow to the outside and be guided to the outside. In this case, the hinge 64 is made to interlock with a lever 66 provided at the end of the shaft 65, and the return is made by a weight 67. In this case as well, the water level tracking type weir member without the transmission mechanism and the copying member is used, but when the transmission mechanism and the copying member are configured, the operation of the weir member 68 is indicated by the phantom line. Can be transmitted by a rod 69 to open and close the shutter 65.

[0008]

As described above, according to the present invention, since the valve opening is formed so as to be short in the rotating direction and long in the direction orthogonal thereto, a large flow passage can be obtained with a small kick angle.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention in a valve closed state.

FIG. 2 is a cross-sectional view showing a valve opened state.

FIG. 3 is a front view showing an opening of a valve body.

FIG. 4 is a front view showing another embodiment of the opening.

FIG. 5 is a front view showing another embodiment of the opening.

FIG. 6 is a front view showing another embodiment of the opening.

FIG. 7 is a front view showing another embodiment of the opening.

FIG. 8 is a perspective view showing another embodiment of the scum deriving means.

FIG. 9 is a perspective sectional view showing a water level following type scum removing device.

FIG. 10 is a side view showing a conventional scum removing device and a valve.

FIG. 11 is a plan view showing a conventional valve in a valve closed state.

FIG. 12 is a sectional view of the valve in an open state.

[Explanation of symbols]

 1 Housing 10 Valve Body 11 Opening 40 Lever 50 Introducing Pipe

Claims (1)

[Scope of utility model registration request] 1. A scum which is fixedly provided in a sedimentation basin with its lower part immersed in the water surface and its upper part above the water surface, and has an opening lower than the water surface on one side and introduced through the same opening. And a scum removing device equipped with a trough shaped so as to lead water out to the outside and a weir member provided on the opening side of the trough so as to be vertically movable, for leading out connected to the trough. A valve for a scum removing device, characterized in that an opening for introducing the valve body has a shape that is long in the direction of the center of the rotation axis and short in the direction orthogonal to it. .