JPH0334246Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is based on the inflow of organic wastewater, aeration, precipitation,
This invention relates to a device for lifting and lowering a trough for discharging supernatant water installed in a reaction tank of a batch type sludge treatment device that carries out a drainage process in the same tank for purification treatment.

(Prior Art) Conventionally, as shown in FIG. 4, a discharge base pipe 52 is installed at the bottom of a batch reaction tank 51, and a swingable elastic pipe member is attached to the end of this discharge base pipe 52. A discharge pipe 53 composed of
A trough 54 is connected to the upper end of the discharge pipe 53,
This trough 54 is configured to float on the sewage surface in the reaction tank 51 via air tanks 55, 55, and the sewage is flowed into the reaction tank 51 and is aerated for a predetermined period of time. After aeration, sludge settles on the bottom and supernatant water is separated on the top.
This supernatant water gradually passes through the trough 54 to the discharge pipe 5.
3. It is discharged to the outside from the discharge base pipe 52.

(Problems to be solved by the invention) In the conventional structure described above, sewage often flows into the trough 54 during the aeration process, and in the early stage of discharging supernatant water, the sewage in the discharge pipe 53 etc. is sucked out. Therefore, there is a problem that efficiency is poor, and there are also problems such as durability because the discharge pipe 53 swings, and it is difficult to control the raising and lowering of the trough 54.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and an object of the present invention is to provide a trough elevating device that can satisfactorily raise and lower a trough capable of collecting supernatant water. The purpose is to provide an elevating device for elevating a trough capable of collecting supernatant water in a batch reaction tank, which comprises two or more leads with different leads connected to said trough. It is constructed by comprising a screw screw, a sprocket attached to each screw screw through a cam clutch having a different engagement direction, and a geared motor capable of driving each sprocket through a chain.

(Function) Two or more screw screws with different leads are connected in a trough that can collect supernatant water,
A sprocket is attached to this screw screw via a cam clutch, and the engagement direction of the cam clutch of each screw screw is different, so when the geared motor is rotated and the sprocket is rotated via the chain,
Since the cam clutch on one side is engaged and the screw screw on one side can be lowered or raised, for example, if the screw screw on one side is configured to move in the downward direction when the chain is rotated to the right, The water collection trough can be lowered favorably and the supernatant water can be discharged favorably. In addition, by reversing the geared motor, the cam clutch on the other side engages and the screw screw on the other side rises, so the water collection trough can be placed in a standby position at an upper position where sewage does not flow into the water collection trough during the sewage inflow process or aeration process. can be done. Furthermore, if the screw screws on one side and the screw screws on the other side have different leads, for example, the water collection trough can be lowered slowly when moving in the downward direction, and raised rapidly when moving up. I can do it.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a schematic layout diagram of a trough lifting device, and in the figure, a water collection trough (not shown) has four screw screws 1a, 1b, 2a, 2 in an upright manner.
In this example, the leads of the screw screws 1a and 1b arranged in opposite directions are 60 mm/
The leads of the opposing screw screws 2a and 2b are formed to rotate 4 mm/one turn.

A sprocket with a cam clutch is attached to each screw screw 1a, 1b, 2a, 2b.A sprocket 4 is attached to the screw screw 1a via a cam clutch 3, and a sprocket 6 is attached to the screw screw 1b via a cam clutch 5. A sprocket 8 is connected to the screw screw 2b via a cam clutch 7 to 2a.
A sprocket 10 is attached to each via a cam clutch 9.

Further, a chain C is attached to each sprocket 4, 6, 8, and 10, and a geared motor 11 for driving this chain C is arranged, and is fixedly attached to the end of the motor shaft of the geared motor 11. The sprocket 11a is engaged with the chain C.

This geared motor 11, cam clutches 3, 5, 7, 9 and sprockets 4, 6, 8, 1
0 is arranged, for example, on a base on the upper surface side of a reaction tank (not shown), and the screw screws 1a, 1b, 2a, 2b are arranged in a hanging manner in the reaction tank, and each screw screw 1a ,1b,2
A water collection trough equipped with a pump connected to the lower ends of a and 2b is capable of collecting the supernatant water separated in the precipitation process and discharging it to the outside. When chain C is rotated clockwise by the geared motor 11,
The screw screws 2a and 2b are moved downward to gradually lower the water collection trough and gradually discharge the supernatant water.On the other hand, when the geared motor 11 is reversed, the screw screws 2a and 2b are moved downward. The structure is such that 1a and 1b can move upward to raise the water collection trough. That is, since the leads of each screw screw 2a, 2b are formed short, it is possible to slowly lower the water collecting trough during descent and gradually drain the supernatant water, and after discharging the supernatant water, the leads are long. The water collection trough can be raised at high speed via each screw screw 1a, 1b.

In addition, in FIGS. 2 and 3, each cam clutch 3,
5, 7, and 9 are shown.

Taking the cam clutch 7 attached to the sprocket 8 as an example, the cam clutch 7 is attached to the lower surface of the sprocket 8 via a fixing screw 7g, and the cam clutch 7 has an outer ring 7.
Bearing 7c and spring 7 between a and inner ring 7b
d is attached, and a screw nut 7e is fixed to the inside of the inner ring 7b.
This screw nut 7e can be screwed into the screw screw 2a.

Furthermore, as shown in FIG. 3, a cam 7f is arranged between the outer ring 7a and the inner ring 7b, and in the case of the cam clutch 7, the inner ring 7b side engages with the outer ring 7a only when the sprocket 8 is rotated clockwise. As a result, the screw nut 7e is rotated, and the screw screw 2a can be moved downward as the screw nut 7e rotates.

This cam clutch 7 and the aforementioned cam clutch 9
have the same structure, and conversely, the cam clutch 3 and the cam clutch 5 are structured to mesh only when rotated to the left. Conversely, when chain C is rotated clockwise, cam clutches 7 and 9 engage,
The screw screws 2a and 2b are synchronously lowered by the rotation of the sprockets 8 and 10. At this time, the cam clutches 3 and 5 do not engage, and the sprockets 4 and 6 are rotated idly, so that the screw screws 1a and 1b receive upward driving force. It does not cost anything. Conversely, when the chain C is rotated in the opposite direction due to the reverse rotation of the geared motor 11, the cam clutches 3 and 5 engage to raise the screw screws 1a and 1b, and at this time the cam clutches 7 and 9 are idled.

With this structure, when discharging supernatant water, the water collecting trough can be lowered slowly using the screw screws 2a and 2b with short leads, and after discharging supernatant water, by reversing the geared motor 11, the screw screws with long leads can be lowered. Screw screw 1
a and 1b, the water collection trough can be raised at high speed, the structure is simple, and the raising and lowering of the water collection trough can be easily controlled by controlling the geared motor 11. By providing a speed difference in the vertical movement of the water collection trough, it is possible to improve the processing capacity of the entire sewage treatment apparatus.

(Effects of the invention) The trough elevating device of the present invention is an elevating device for elevating a trough capable of collecting supernatant water in a batch reaction tank, and includes a lead that is connected to the trough and is connected to the trough. The structure is made up of two or more different screw screws, a sprocket attached to each screw screw through a cam clutch with a different engagement direction, and a geared motor that can drive each sprocket through a chain. In addition to easy maintenance, the vertical movement of the water collection trough can be easily controlled by controlling the rotation direction of the geared motor, and the screw screws have different leads. When the water trough is lowered, it can be lowered slowly, and when it is raised, it can be raised rapidly.This has the effect of preventing sewage from flowing into the water collection trough, improving treatment capacity and ensuring reliable treatment. have

[Brief explanation of the drawing]

An embodiment of the present invention is shown in the figures, in which Fig. 1 is a schematic layout diagram of the trough elevating device of the present invention, Fig. 2 is a cross-sectional diagram of the cam clutch, and Fig. 3 is an explanatory diagram of the operation of the cam clutch shown in Fig. 2. FIG. 4 is a schematic diagram showing an example of a conventional batch type reaction tank. 1a, 1b, 2a, 2b...screw screws,
3, 5, 7, 9...cam clutch, 4, 6, 8,
10... Sprocket, 11... Geared motor, C... Chain.

Claims (1)

[Scope of utility model registration request] A lifting device for raising and lowering a trough capable of collecting supernatant water in a batch reaction tank, which has two or more screw screws with different leads that are connected to the trough and are connected to the screw screws. A trough for drawing out supernatant water of a batch-type sludge treatment device, characterized in that it is comprised of sprockets respectively mounted via cam clutches in different mating directions, and a geared motor capable of driving each sprocket via a chain. lift device.