JP3915389B2 - Supernatant water discharge device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a supernatant water discharge device, and more particularly to a supernatant water discharge device for a batch tank used in an agricultural village drainage treatment facility or a fishery village drainage treatment facility.
[0002]
[Prior art]
The supernatant water in the batch tank is discharged out of the tank using a supernatant water discharge device. This supernatant water discharge device raises and lowers the drainage trough installed in the batch tank to guide the supernatant water into the drainage trough and discharge it outside the tank.
[0003]
And the raising / lowering mechanism of the conventional drainage trough is comprised as follows. That is, guide pillars are erected vertically at the four corners of the drainage trough, and the drainage trough is slidably supported on the guide pillar via a shoe. Then, a pair of endless chains are connected to the left and right ends of the drainage trough, the endless chain is wound around a pair of upper and lower sprockets, and the sprockets are rotated to raise and lower the drainage troughs along the guide columns. ing.
[0004]
[Problems to be solved by the invention]
However, the conventional drainage trough raising / lowering mechanism is configured to raise and lower the drainage trough with a pair of chains connected to the left and right ends of the drainage trough. For example, when elongation occurs in one chain, the drainage trough Has a drawback that it cannot be smoothly operated.
[0005]
The drainage trough is slidably supported by the guide pillars arranged at the four corners via the shoes. However, after a long period of use, scum (dust) adheres between the guide pillars and the shoes, making it smooth. There is also a drawback that it is impossible to perform proper operation.
[0006]
This invention is made | formed in view of such a situation, and it aims at providing the supernatant-water discharge | emission apparatus which can operate a drainage trough smoothly.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention guides the supernatant water in the treatment tank into the drainage trough by raising and lowering the drainage trough installed in the treatment tank, and discharges it outside the treatment tank through the drainage pipe. In the supernatant water discharging apparatus, the guide trough vertically disposed through the center of gravity of the drain trough and the drain trough, the outer periphery of the guide pillar is sandwiched, and the drain trough is A plurality of guide rollers that are slidably supported with respect to the guide pillars, a pair of sprockets disposed above and below the drain trough, and both ends connected to the drain trough and wound around the pair of sprockets There is provided a supernatant water discharging apparatus comprising: one chain that is formed, and a motor that rotates the sprocket.
[0008]
According to the present invention, the drainage trough is slidably supported by the guide column disposed through the center of gravity via the guide roller. Therefore, the tilt is difficult to occur, and even if the residue adheres to the guide column, it can operate smoothly. In addition, since it is driven by one chain to move up and down, the drainage trough does not tilt and can move up and down smoothly even if the chain is stretched.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a supernatant water discharging apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 1 is a side view showing an embodiment of a supernatant water discharging apparatus according to the present invention. As shown in the figure, the supernatant water discharge device 10 raises and lowers the drainage trough 12 to guide the supernatant water in the batch tank 14 into the drainage trough 12, and discharges it outside the tank via the drainage pipe 16.
[0011]
The drainage trough 12 is comprised by the supernatant water discharge part 20, the scum discharge part 22, and the guide unit 24, as shown in FIGS. The supernatant water discharge portion 20 is formed in a U-shaped groove having an upper surface opened, and both ends thereof are fixed to the inner surface of the scum discharge portion 22. On the other hand, the scum discharge part 22 is formed in a rectangular frame shape, and is attached so as to surround the supernatant water discharge part 20. And the height is formed with the height of the supernatant water discharge part 20 about twice.
[0012]
The guide unit 24 includes a single guide tube 26 and a plurality of guide rollers 28 </ b> A and 28 </ b> B, and is disposed at the center of gravity of the drainage trough 12. The guide tube 26 is formed in a rectangular cylindrical shape, and is erected vertically at the center position of the supernatant water discharge portion 20 (corresponding to the gravity center position of the drainage trough 12). The guide rollers 28A and 28B are rotatably attached to the sides of the upper and lower ends of the guide tube 26 via brackets 30A and 30B.
[0013]
Here, as shown in FIG. 1, one guide column 32 having a quadrangular cross section is erected vertically in the batch tank 14. As shown in FIGS. 2 to 4, the guide pipe 26 of the drainage trough 12 is inserted into the guide column 32. The guide rollers 28A and 28B provided at the upper and lower ends are in contact with the surfaces of the guide column 32, respectively. The drainage trough 12 is guided vertically along the guide column 32 as each guide roller 28A, 28B rolls on the outer peripheral surface of the guide column 32 in the axial direction. Thus, the drainage trough 12 is supported so as to be movable up and down in the vertical direction.
[0014]
As shown in FIG. 1, an upper sprocket 36 is rotatably supported above the batch tank 14 via an upper support frame 34. On the other hand, a lower sprocket 40 is rotatably supported in the batch tank 14 via a lower support frame 38. The upper sprocket 36 and the lower sprocket 40 are installed in the vertical direction with the drain trough 12 interposed therebetween, and a main chain 42 is wound around each.
[0015]
As shown in FIG. 4, the main chain 42 is disposed through the drainage trough 12, and one end thereof is connected to a bracket 30 </ b> A provided at the upper end of the guide pipe 26 of the drainage trough 12. The other end is connected to a bracket 30B provided at the lower end of the guide pipe 26 of the drain trough 12, and is formed in an endless shape as a whole.
[0016]
A motor (not shown) is connected to the upper sprocket 36, and the upper sprocket 36 is rotated by driving the motor. As the upper sprocket 36 rotates, the main chain 42 rotates. As a result, the drain trough 12 moves up and down along the guide pillar 32.
[0017]
Then, as shown in FIG. 3, the drainage trough 12 is moved up and down, so that the supernatant water enters the drainage trough 12 through the openings 44 and 44 formed on the lower surface of the drainage trough 12, and the supernatant water discharge unit 20. Flows in.
[0018]
Drain ports 46, 46 are formed on both side surfaces of the drain trough 12, and the supernatant water that has flowed into the supernatant water discharge unit 20 passes through the drain pipes 16, 16 connected to the drain ports 46, 46. Drained out of the tank. The drain pipes 16 and 16 have a panda graph structure, and are drained while being bent by the rotary joint portions 16A, 16A,.
[0019]
The operation of the supernatant water discharging apparatus 10 of the present embodiment configured as described above is as follows.
[0020]
As shown in FIG. 1, the drain trough 12 is located at the standby position in the non-operating state. In order to remove the supernatant water in the batch tank 14 by driving the supernatant water discharging device 10 from this state, first, the motor (not shown) is driven to rotate the upper sprocket 36. As a result, the main chain 42 rotates and the drain trough 12 starts to descend.
[0021]
When the lowered drainage trough 12 reaches the water surface and enters a little from the water surface, the supernatant water enters the drainage trough 12 from the lower surface openings 44 and 44 of the drainage trough 12. Then, the supernatant water that has entered the drainage trough 12 flows into the supernatant water discharge part 20 from the upper surface opening of the supernatant water discharge part 20, and from the drain pipes 16 and 16 to the outside of the tank via the drain ports 46 and 46. Drained.
[0022]
At this time, since the scum floating in the supernatant water is blocked by the scum discharge portion 22 attached around the supernatant water discharge portion 20, only the supernatant water enters the drain trough 12.
[0023]
When the supernatant water is discharged as described above, the water level of the supernatant water is lowered, so that the drainage trough 12 is lowered following the fluctuation of the water level of the supernatant water. Thereby, the supernatant water in the batch tank 14 is drained sequentially outside the tank. Then, when the water level of the supernatant water reaches a predetermined water level set in advance (for example, the water level of “LWL” in FIG. 1), the draining operation is terminated. That is, the lowering of the drainage trough 12 is stopped, the upper sprocket 36 is rotated in the reverse direction, and the drainage trough 12 is raised. Then, it is returned to the standby position.
[0024]
By the way, the drainage trough 12 descends along the guide pillar 32 to take in the supernatant water and drain it. At this time, the drainage trough 12 is driven by a single main chain 42 and is thus configured to move up and down. Even if the main chain 42 is stretched, there is no inclination or the like as in the prior art, and a smooth raising / lowering operation can always be performed.
[0025]
Moreover, since it is slidably supported by the guide pillar 32 penetrating the center of gravity, a stable lifting operation can be performed.
[0026]
Further, since the drainage trough 12 is configured to move up and down while being guided by guide rollers 28A and 28B that roll on the outer peripheral surface of the guide column 32, there is a risk of malfunction due to adhesion of residue etc. even if used for a long time. And can always ensure smooth movement.
[0027]
Thus, according to the supernatant water discharging apparatus 10 of the present embodiment, the drainage trough 12 can always ensure a stable and smooth operation. Thereby, drainage operation of supernatant water can be performed smoothly.
[0028]
Moreover, since the drainage trough 12 is comprised by the two-stage structure of the supernatant water discharge part 20 and the scum discharge part 22, it can discharge | emit supernatant water discharge and scum discharge simultaneously.
[0029]
In the present embodiment, a guide pillar 32 having a square cross section is used, but a circular cross section, a polygonal shape, or an H-shaped steel may be used. In this case, the number of guide rollers 28A and 28B is increased or decreased as appropriate. That is, for example, for a guide column having a circular cross section, the guide column is guided by sandwiching the peripheral surface of the guide column with three guide rollers arranged at equal intervals. The guide rollers are guided by being sandwiched from both sides.
[0030]
Further, in the present embodiment, the drainage trough 12 has a two-stage structure of the supernatant water discharge part 20 and the scum discharge part 22, but a scum discharge part may be further provided outside the scum discharge part 22 to form a multistage structure.
[0031]
Moreover, in this Embodiment, although the shape of the drainage trough 12 is made into the rectangular shape, it is not limited to this, You may make circular shape, polygonal shape, etc. besides this. In this case as well, the guide column 32 is disposed through the center of gravity of the drainage trough 12.
[0032]
【The invention's effect】
As described above, according to the present invention, the drainage trough is slidably supported by the guide column disposed through the center of gravity via the guide roller, so that the inclination is not easily generated. Even if the scum is attached, it can operate smoothly. Furthermore, since it is driven up and down by one chain, the drainage trough can be lifted up and down smoothly without tilting even if the chain is stretched.
FIG. 1 is a side view showing a configuration of a supernatant water discharge device in a batch tank. FIG. 2 is a perspective view showing a configuration of a supernatant water discharge device. FIG. 3 is a perspective view showing a configuration of a supernatant water discharge device. Cross-sectional side view of trough [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Supernatant water discharge device, 12 ... Drain trough, 14 ... Batch tank, 16 ... Drain pipe, 16A ... Rotary joint part, 20 ... Supernatant water discharge part, 22 ... Scum discharge part, 24 ... Guide unit, 26 ... Guide pipe 28A, 28B ... guide roller, 30A, 30B ... bracket, 32 ... guide post, 34 ... upper support frame, 36 ... upper sprocket, 38 ... lower support frame, 40 ... lower sprocket, 42 ... main chain, 44 ... opening , 46 ... Drain outlet

Claims (2)

In the supernatant water discharge device that guides the supernatant water in the treatment tank into the drainage trough by raising and lowering the drainage trough installed in the treatment tank, and discharging it to the outside of the treatment tank through the drain pipe,
One guide column vertically disposed through the center of gravity of the drainage trough, and provided on the drainage trough and sandwiching the outer periphery of the guide column, the drainage trough is slidable with respect to the guide column A plurality of guide rollers supported by
A pair of sprockets disposed above and below the drain trough;
One chain having both ends connected to the drain trough and wound around the pair of sprockets;
A motor for rotating the sprocket;
A supernatant water discharging device comprising: The drainage trough
The upper surface is formed with an opening, and the supernatant water discharge part into which the supernatant water in the treatment tank flows from the upper surface opening part,
It is arranged so as to surround the periphery of the supernatant water discharge part, is formed higher than the supernatant water discharge part, blocks the scum floating in the supernatant water, and flows into the supernatant water discharge part A scum discharge part to prevent
The supernatant water discharging apparatus according to claim 1, comprising:

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