KR101651580B1 - Movable weir device for sedimenbtation tank - Google Patents

Abstract

The present invention relates to a movable weir device for a sedimentation tank, which can move a weir to a location where a relatively small amount of sediment floats by means of a turnover which occurs due to a change in water temperature of a sedimentation tank, thereby discharging supernatant. According to the present invention, the movable weir device for a sedimentation tank is disposed to be movable upstream and downstream of a sedimentation tank. Furthermore, the movable weir device for a sedimentation tank comprises: a pair of rails which are disposed on opposite inner walls of the sedimentation tank, respectively; a weir which has mounting grooves configured to be seated on the rails and notches configured such that supernatant of the sedimentation tank is introduced therethrough; and a discharge pipe through which supernatant accommodated inside the weir is discharged out of the sedimentation tank.

Description

[0001] MOVABLE WEIR DEVICE FOR SEDIMENBTATION TANK [0002]

The present invention relates to a movable weir apparatus for a settling tank, and more particularly, to a weir apparatus capable of discharging a supernatant by moving a weir to a position where the floating of the sediment is relatively small due to a turnover caused by a change in water temperature of the settling tank The present invention relates to a sedimentation mobile weir device.

Facilities for the treatment of waste water and wastewater will usually include flow control, physico-chemical treatment, biological treatment, sedimentation and effluent treatment.

In such a waste water treatment facility, the settling tank is kept in a closed state for a long time, and the sludge contained in the wastewater is precipitated and removed. The waste water and the upper water in the settling tank where the sludge is settled are relatively clean So that the upper part of the inside of the settling tank is provided with a weir so that only the supernatant can be introduced to supply or discharge the supernatant introduced into the weir to another treatment tank.

A configuration for leading the supernatant from the weir provided in the settling tank to another treatment tank is shown in Fig.

FIG. 1 is a view showing a construction of a weir for transferring a conventional high-quality water to another treatment tank. The conventional weir 20 is fixed on the downstream side of the inner upper portion of the settling tank 10, , A notch (21) for introducing the supernatant and a discharge pipe (22) for discharging the supernatant introduced into the weir (20) to the outside.

In the above-described structure, the sedimentation tank is designed such that the upstream of the water is deeply formed, and the downstream site where the weir is installed is designed to be relatively lower than the upstream depth so that the sediment is concentrated on the upstream side. The flow velocity may be generated in accordance with the depth difference of the settling tank, and the sludge such as fine flakes settled in the settling tank by the occurrence of the flow velocity may be impacted or the sludge may not be settled due to the flow velocity, And may be discharged through the weir.

In order to solve the above problems, Japanese Patent Application Laid-Open No. 10-1201492 discloses a shearing device for improving the quality of water discharged from the clarifier.

The above technique may be applied to a shear span installed in the shear zone of the settling basin. And a bypass pipe connected to the shear weir and bypassing a part of the flow rate accommodated in the shear weir to a rear weir installed at a rear end of the settler, wherein the shear weir has a plurality of notches formed on a side surface thereof; And a scum blocking film disposed on the front surface of the trough on which the notch is formed to prevent the scum from being directly introduced into the trough.

On the other hand, as the temperature of the sedimentation tank becomes lower than the temperature of the sedimentation tank due to the change of temperature, convective phenomenon occurs and turn over phenomenon occurs in which the deep layer and the surface layer water are mixed with each other.

FIG. 2 is a cross-sectional view of the precipitate when the turnover occurs. FIG.

In summer, the distinction between surface water layer, thermocline and deep water layer is surely stable from the upper part of the sedimentation tank due to high atmospheric temperature and solar heat in summer. However, when fallen temperature falls in summer, temperature of water surface decreases, And when the water temperature that is gradually lowered becomes lower than that of the deep water, convection occurs in the sedimentation tank and a turnover phenomenon occurs in which the deep water layer and the surface water layer are mixed with each other.

At this time, a relatively stable sedimentation occurs because the temperature of the incoming water is low in the upstream of the sedimentation tank 10 into which the water flows, whereas the downstream part of the sedimentation tank 10 counteracts the interstratification of the surface layer, the thermochemical layer and the deep water layer, It will rise. And the precipitate floating thereon is discharged through the weir.

In order to repopulate the floating sediments in the event of such a turnover, chemical agents are injected or filters are installed in the notches 21 of the weir 10 to prevent the sediment from floating. However, it takes a lot of cost due to the input of chemicals, and there is a disadvantage that the installed filters must be replaced periodically.

Moreover, the floatation of the sediment due to such a turnover can not be solved by a configuration in which the weir is fixed in the sedimentation tank, such as the shear weir apparatus disclosed above.

KR 10-1201492 B1 (Registered on November 08, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide an apparatus and a method for separating a weir from a weir, And to provide a sedimentation movable weir device.

Another problem to be solved by the present invention is to provide a movable weir apparatus for a sedimentation tank, which can reduce the cost of sedimentation tank by preventing the introduction of chemicals and the installation of filters due to the rise of sediments.

In order to solve the above problems, the movable weir apparatus for a settling tank according to the present invention is installed so as to be movable in the upstream and downstream directions of the settling tank.

Specifically, the weir device includes a pair of rails, each of which is installed on a facing inner wall of the settling tank; A weir having a seating groove that is seated on the rail, the weir having a notch for introducing a supernatant of the precipitation tank; And a discharge pipe for discharging the supernatant contained in the weir to the outside of the sedimentation tank.

The discharge tube may include a first slide tube installed through the side wall of the sedimentation tank; And a second slide disposed inside the first slide tube so as to be slidable, one end of which is slidably installed within the first slide tube within a predetermined range, and the other end of which is provided in communication with the inside of the weir, And a pipe.

The apparatus may further include a driving unit for moving the weir in the upstream and downstream directions along the rail.

At this time, the driving unit includes a rack installed along the rail; A motor installed at an upper portion of the weir and performing forward and reverse rotation according to application of electric energy; And a pinion connected to the rotating shaft of the motor and engaged with the rack.

According to the present invention, when the turnover occurs in the sedimentation tank, the weir can be moved to a position where the sediment does not float, and the supersonic water can be discharged. Therefore, it is possible to reduce the cost of installation of chemicals and installation of filters, There is an advantage that the maintenance cost can be reduced.

In addition, there is an advantage in that reliability of the sedimentation facility can be improved because the discharge of floating sediment can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the construction of a weir for transferring a conventional supersonic water to another treatment tank. Fig.
FIG. 2 is a cross-sectional view of a sediment upon the occurrence of a turnover. FIG.
3 is a perspective view of a movable weir apparatus for a settling tank according to the present invention.
4 is a sectional view taken along the line AA 'of FIG. 3;
5 is a perspective view of a weir apparatus according to an embodiment of the movable weir apparatus for settling vessels according to the present invention.
6 is an operational cross-sectional view of a discharge tube according to an embodiment in a mobile weir apparatus for a settler in accordance with the present invention.
7 is a perspective view of a movable weir apparatus for a settling tank according to an embodiment of the present invention;
8 is a perspective view of a movable weir apparatus for a settling tank according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a movable weir apparatus for a settling tank capable of discharging a supernatant by moving a weir to a position where the floating of the sediment is relatively small due to a turnover caused by a change in water temperature of the settling tank.

FIG. 3 is a perspective view of a movable weir apparatus for a settling tank according to the present invention. FIG. 3 is a perspective view of a movable weir apparatus for a settling tank according to the present invention. The movable weir apparatus for a settling tank according to the present invention is installed inside an upper part of a settling tank 100, And is provided so as to be movable in the upstream and downstream directions of the sedimentation tank 100, discharging the supernatant precipitated in the wastewater.

Here, the upstream is a portion where the wastewater flows into the settling tank 100 when the settling tank 100 has a hexahedron shape, and the downstream portion indicates a portion where the precipitate mixed with the incoming wastewater is settled and the supernatant is discharged do.

A configuration in which the weir device is movable in the above will be described with reference to an embodiment.

FIG. 4 is a cross-sectional view taken along line AA 'of FIG. 3, and FIG. 5 is a perspective view of a weir apparatus according to an embodiment. The weir apparatus 200 according to an embodiment of the present invention includes: A pair of rails 210 provided on side walls and a seating groove 221 seated on the rail 210 and a weir 220 having a notch 222 for introducing the upper water of the settling tank 100 And a discharge pipe 230 for discharging the supernatant contained in the weir 220 to the outside of the settling tank 100.

Referring to FIG. 4, the weir 220 is seated on a pair of rails 210, which are respectively installed on the facing inner wall of the settling tank 100. The discharge pipe 230 is installed through one side wall of the settling tank 100 and has one end connected to the outside of the settling tank 100 and the other end connected to the inside of the weir 220.

At this time, the weir 200 may be made of a material that is heavier than the density of water so as to remain in the rail 210, and may be made of a material having high corrosion resistance and chemical resistance.

The weir 220 can be moved upstream and downstream along the rail 210 by the user's operation and the weir 220 can be moved in the case of the discharge pipe 230 coupled to the weir 220 The length of the exposed portion of the sedimentation tank 100 is variable.

The length of the discharge pipe 230 should be prolonged in proportion to the movable distance of the weir 220 and the discharge pipe 230 is connected to the bottom of the settling tank 100 as the weir 220 approaches the downstream side. A disadvantage that the length of the exposed portion to the outside becomes long is generated.

Accordingly, in order to solve the disadvantage that the length of the discharge pipe 230 exposed to the outside of the sedimentation tank 100 becomes long, the discharge pipe 230 may be of the telecope type.

6 is an operational sectional view of a discharge pipe according to an embodiment of the present invention in a mobile weir apparatus for a settler.

6, the discharge pipe 230 includes a first slide pipe 231 installed through the side wall 101 of the sedimentation tank 100 and a second slide pipe 231 slidable in the first slide pipe 231 A second slide tube 232 having one end slidably installed within the first slide tube 231 within a predetermined range and the other end connected to the inside of the weir 220, .

The protrusion 233 is formed at one end of the second slide tube 232 and the protrusion 233 corresponding to the protrusion 233 is provided in the first slide tube 231, 2 slide tube 232 is slid within the range of the protrusion moving groove 234. [

In addition, protrusions (not shown) are provided at both ends of the first slide tube 231 to prevent the first slide tube 231 from separating from the side wall 101 penetrating therethrough.

At this time, a sealing member 235 for sealing is provided between the inner diameter of the first slide tube 231 and the outer diameter of the second slide tube 232. A bushing 236 is provided between the side wall 101 and the first slide tube 231 and a sealing member for sealing is provided between the inner diameter of the bushing 236 and the first slide tube 231 237 are provided.

The third slide tube (not shown in the drawing) may be further provided in the second slide tube 232 to slide within the predetermined range of the slide tube 232, It is needless to say that the fourth slide tube (not shown in the drawing) may be further provided.

Also, a plurality of the discharge pipes 230 may be provided according to design conditions.

According to the above-described configuration, the length of the discharge pipe 230 is expanded and contracted according to the movement of the weir 220, so that the length of the discharge pipe 230 protruding out of the settling tank 100 can be minimized.

Here, the lifting of the precipitate generated by the turn over in the sedimentation tank 100 tends to occur severely in the downstream relative to the upstream. Accordingly, when the weir 220 is moved to the midstream side when the turnover occurs, the movable weir apparatus for the settling tank of the present invention has an advantage of discharging the supernatant to the outside of the settling tank 100 while minimizing the discharge of floated sediment.

On the other hand, the weir device may be of an electric type.

FIG. 7 is a perspective view of a movable weir apparatus for a settling tank according to an embodiment of the present invention, and further includes a driving unit for driving the weir 220 electrically.

Referring to FIG. 7, the driving unit 300 moves the weir 220 upstream and downstream along the rail 210.

The driving unit 300 for performing such a function includes a rack 310, a motor 320, and a pinion 330.

The rack 310 is installed along the rail 310 at the upper end of the wall of the sedimentation tank 100.

The motor 320 is installed on the upper portion of the weir 220 by rotating and rotating the rotary shaft according to application of electrical energy.

The pinion 330 is coupled to the rotating shaft of the motor 320 and is engaged with the rack 310.

Here, a controller for controlling the forward and reverse rotation of the motor 320 may be further included.

Accordingly, the weir 220 moves to the upstream side or the downstream side along the rack 310 through the forward / reverse rotation of the motor 320.

When the drive unit 300 is installed only on one side of the weir 220, the weir 220 may be moved in a state of being biased to one side. Therefore, the driving unit 300 is provided on the left and right sides of the weir 220 as a pair. Further, when the driving units 300 are provided in pairs on the left and right sides, each of the motors may be configured to be prevented from being moved in an uniaxial direction by using the same model, and the electric energy applied to the motors 320 may be synchronized Lt; / RTI >

The driving unit 300 is an example of moving the weir 220 electrically. Accordingly, the rack 310 may be replaced with a chain according to design conditions, and the pinion 330 may be replaced with a sprocket.

Here, a limit switch (not shown in the figure) for limiting the movement of the weir 220 moved in accordance with the driving of the driving unit 300 may be further provided.

8 is a perspective view of a movable weir apparatus for a settling tank according to another embodiment of the present invention.

Referring to FIG. 8, the driving unit 300 includes a motor 340, a driving gear 350, a driven gear 360, and a ball screw 370.

The motor 340 rotates the rotating shaft by the applied electric energy. At this time, the motor 340 employs a motor capable of rotating forward and backward.

The drive gear 350 is coupled to the rotational shaft of the motor 340 and meshes with the follower 360.

The driven gear 360 rotates the ball screw 370 with the rotational force applied from the driving gear 250.

The nut housing is coupled to the weir 220 on the ball screw 370 and converts the rotational motion of the bolt screw 370 into linear motion to linearly move the weir 220.

That is, the weir 220 is moved along the bolt screw 370 by the forward / reverse rotation of the motor 340.

According to the present invention, when the turnover occurs in the sedimentation tank, the weir can be moved to a position where the sediment does not float, and the supersonic water can be discharged. Therefore, it is possible to reduce the cost of installation of chemicals and installation of filters, There is an advantage that the maintenance cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: settling tank 101: side wall
200: weir device 210: rail
220: weir 221: seat groove
222: notch 230: discharge pipe
231: first slide tube 232: second slide tube
234: projection moving groove 235: sealing member
236: bushing 237: sealing member
300: driving part 310: rack
320, 340: motor 330: pinion
350: driving gear 360: driven gear
370: Nut Housing

Claims (5)

A weir apparatus (200) installed inside an upper part of a settling tank (100) and discharging a supernatant settled with sediment in the waste water flowing upstream of the settling tank (100)
The weir device (200)
And is installed to be movable in the upstream and downstream directions of the settling tank 100,
A pair of rails 210 installed on respective inner side walls of the settling tank 100;
A weir 220 provided with a seating groove 221 to be seated on the rail 210 and provided with a notch 222 through which the supernatant of the settling tank 100 flows; And
A discharge pipe (230) for discharging the supernatant contained in the weir (220) to the outside of the settling tank (100);
/ RTI >
The discharge pipe (230)
A first slide pipe (231) installed through the sidewall of the sedimentation tank (100); And
The first slide pipe 231 is slidably installed in the first slide pipe 231 and the other end is slidably installed within the first slide pipe 231 within a predetermined range. A second slide tube 232 installed to communicate with the second slide tube 232;
/ RTI >
A driving unit 300 for moving the weir 220 upstream and downstream along the rail 210;
Further comprising:
The driving unit 300 includes:
A motor 340 that rotates the rotating shaft by the applied electric energy and is capable of forward and reverse rotation;
A driving gear 350 coupled to the rotating shaft of the motor 340;
A driven gear 360 engaged with the driving gear 350;
A ball screw (370) rotated by the rotation of the driven gear (360); And
A nut housing coupled to the weir 220 and adapted to linearly move the weir 220 by converting the rotational movement of the ball screw 370 into linear motion;
Lt; / RTI >
Wherein the weir (220) is moved to a position where the precipitate does not float when the turnover occurs in the settling tank (100).
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