JPH02108900A - Pumping device in sewage disposal - Google Patents

Abstract

PURPOSE:To secure the constancy of the pumping quantity even with the fluctuation in the water depth by providing a float at a lifting pipe and making the distance between an air discharge opening provided at the lifting pipe and the liquid level constant. CONSTITUTION:A float 2 for making a lifting pipe 1 float is provided at the lifting pipe 1, and when the water level of a first drum 4 fluctuates because of the float 2 floating on the level of the first drum 4, the float 2 moves vertically. The upper and lower ends of the lifting pipe 1 are opened, and an air discharge opening 3 is provided in the vicinity of the opening part of the lower end of the lifting pipe 1. A flexible hose 5 is connected to the air discharge opening 3 so as to be connected to an air pump, the air fed from the air pump is discharged from the discharge opening 3, sewage water in the first drum 4 is pumped by means of a lifting pipe 1 and flows into a second drum 6. In this case, the air discharge opening 3 provided around below the lifting pipe 1 is fitted such as not to be vertically shifted. Accordingly, the distance between the air discharge opening 3 and the level are always kept constant even if the lifting pipe 1 moves vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a water pumping device for sewage treatment, and more specifically, to a water pumping device for sewage treatment. This technology relates to a technology that equalizes the amount of wastewater to be treated by pumping up and transferring a fixed amount of wastewater regardless of fluctuations in the amount of wastewater flowing into the system.

[Prior Art] A water pumping device using an air lift has been known as a means for transferring wastewater from a first tank into which wastewater flows into a second tank.

[Problems to be Solved by the Invention] The water pumping device using air 117 can be installed without using the driving pump and has a high degree of safety against clogging, so it has a long life, and even if it becomes clogged, it can be installed easily. It has various characteristics such as being easy to clean and being inexpensive, but on the other hand, the amount of water pumped fluctuates depending on changes in water depth. The accuracy of transferring a fixed amount to PIS2W! was poor, and therefore the processing amount could not be leveled.

The present invention was devised in view of the problems of the above-mentioned conventional example, and its purpose is to utilize the advantages of the air 1J7 water pumping method while also
To provide a water pumping device for sewage treatment, which solves the problems of the water pumping method using water and which can ensure quantitativeness of the amount of water pumped even when the water depth varies.

[Means for Solving the Problems 1] The water pumping device for sewage treatment of the present invention is provided with a pumping vibrator 1 70-) and 2 for floating a hot water vibrator 1, and an air discharge port 3 is provided in a pumping pipe 1, so that the air discharge Exit 3
The feature is that the distance between the liquid surface and the liquid surface is constant.

Alternatively, the pumping pipe 1 may be made up of a plurality of vibrators having a constant pumping amount and different lengths, and the plurality of pumping pipes 1 may each share the width of the water level to be pumped.

[Function] In other words, when the water level fluctuates, the 70-t 2 moves up and down in response, causing the pumping pipe 1 to move up and down, keeping the distance between the air outlet 3 and the liquid level constant even when the water level fluctuates. ,
The amount of water pumped by the air lift is kept constant.

[Example 1] The present invention will be described in detail below based on an example shown in the accompanying drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG. ,
Sewage flows into the first tank 4 from the outside, and the amount of this sewage flows in an unspecified amount at an unspecified time. In addition, in FIG. 1, the inflow port from the outside to the first tank 4 is not shown. 1st M! A pumping pipe 1 is arranged at 4, and this pumping pipe 1 is provided with a 70-toe 2 for floating the pumping pipe 1.
0-T and H are floating on the liquid surface of the first tank 4,
When the water level in the first tank 4 fluctuates, the water pipe 1 moves up and down.The upper and lower ends of the hot water pipe 1 are open, and an air outlet 3 is provided near the opening at the lower end. It is. A 7 lexiple hose 5 is connected to this air discharge l'3, and this 7 lexiple hose 5
is connected to an air pump (not shown), and the air supplied by the air pump is discharged from the air discharge port 3, and the sewage from the $1 tank 4 is pumped up through the pumping pipe 1 and advected to the tank 12 6. Things are becoming more and more obvious.

Here, the air discharge port 3 provided near the bottom of the pumping pipe 1
is attached so as not to shift vertically with respect to the pumping pipe 1, so that even if the pumping pipe 1 moves up and down, the distance between the air discharge port 3 and the liquid level is always constant.

Here, the theoretical formula for the air lift pump is as follows (see Mechanical Engineering Handbook S) 90a/Q”7
(H10M)/fl(H!oge[(Hs+10)
/ 1011 In the above formula, H: pumping head, Q: pumping amount,
Qa: air fl, hl: total head loss (total of friction loss in the pumping pipe, discharge velocity loss, slip loss between air bubbles and water, etc.), Hs: immersion depth.

Therefore, in the present invention, since the pumping pipe 1 moves up and down following fluctuations in the water level, H and Hs remain constant,
Of the variables in the theoretical formula, the pumped water amount Q depends only on the air ff1Qa'), so if Qa is kept constant, the pumped water amount Q can be made constant.

Next, other embodiments of the present invention will be explained with reference to FIGS. 2 and 3.

In FIGS. 2 and 3, an example is shown in which two pumping pipes 1 having different lengths are used. In this example,
The member 7 is attached to the tank so that it does not move up and down, and two holes 9 are bored in the support plate 8 of the member 7, and an id member 10 is mounted on the upper part of the support plate 8. The id member 10 is provided with a cylindrical γ-id hole 11 at a position corresponding to the hole 9, and the two pumping pipes 1 are connected to the corresponding hole 9 above and below. It is slidably inserted into the id hole 11.

One of the two pumping pipes 1 is short in length, and the pumping pipe 1 on the side of the pond is long. Here, each of the pumping pipes 1 is provided with a 70-t 2, but the 70-t 2 provided in the short pumping pipe 1a is arranged above the support plate 8, and the A 70-toe 2 provided on the pumping pipe 1b is disposed below the support plate 8. Further, a lower limit stopper member 12 is provided below the support plate 8, and this lower limit stopper member 12
When the water level in the tank 4 falls below this lower limit stopper member 12, the 70-toe 2 provided on the longer pumping pipe 1b hits this lower limit stopper member 12, and the longer pumping pipe 1b does not fall below that level. It looks like this. Here, if the liquid level is above the support plate 8, the second
As shown in Figures (a) and (b), the 70-toe 2 of the shorter lifting pipe 1a floats on the liquid level, while the 70-toe 2 of the better pumping pipe 1b hits the lower surface of the support plate 8 and It cannot float higher than that and is located below the liquid level. At this time, the water level sensor detects that the water level is above the support plate 8, so if the water level is above the support plate 8, the air discharge of the longer pumping pipe 1b is The supply of air to the outlet 3 is stopped, air is supplied only to the air outlet 3 of the shorter pumping pipe 1a, and the sewage from the first tank 4 is pumped up by the shorter pumping pipe 1a to the second tank 6. It advects to Furthermore, when the liquid level in the first tank 4 reaches the same level as the support plate 8 as shown in FIG. 2 hits the upper surface of the support plate 8, the supply of air to the air outlet 3 of the shorter pumping pipe 1a is stopped, and air is supplied only to the air outlet 3 of the longer pumping pipe 1b. supply,
The sewage in the first tank 4 is pumped up by the longer pumping pipe 1b and advected to the second tank 6. Next, when the water level drops further, the shorter pumping pipe 1a (7O-)2 hits the upper surface of the support plate 8, preventing it from lowering further, while the longer pumping pipe 1a The 70-toe 2 provided on the pipe 1a follows the low water level f and is located at the same position as the liquid level, and the water level sensor detects that the liquid level is lower than the support plate 8. Upon detection, the supply of air to the air outlet 3 of the shorter pumping pipe 1a is stopped, and air is supplied only to the air outlet 3 of the longer pumping pipe 1b.
The wastewater from I4 is pumped up and advected to the second WJ6.

Furthermore, as shown in FIG. 2(e), when the liquid level drops to the lowest set water level, the 70-toe 2 provided on the longer pumping pipe 1b hits the upper surface of the lower-limit stopper member 12.
The longer pumping pipe 1b is designed not to fall below this level, and if the liquid level falls below this minimum set water level, either the shorter pumping pipe 1a or the longer pumping pipe 1b is Air is also not supplied to the air outlet 3. Therefore, in this case, water pumping by air lift is stopped. In addition, as the liquid level rises, air is supplied only to the air discharge port 3 provided in the pumping pipe lbi, from the state shown in Fig. 2(d) to the state shown in Fig. 2(c). Supply and longer pumping pipe 1b
When the water level rises above the support plate 8, air is supplied to the air outlet 3 of the long pumping pipe 1b as shown in Fig. 2(b) and Fig. 2(a). When the pump stops, air is supplied only to the air outlet 3 provided in the shorter pumping pipe 1a, and water is pumped up through the shorter pumping pipe 1a. Here, in order to make the pumping IQ by the shorter pumping pipe 1a equal to the pumping IQ by the longer pumping pipe 1b, the pumping head H and submersion depth Hs are determined based on Moe's theoretical formula for the air lift pump. is set in advance.

In this embodiment, the water pumping pipe 1b
If the water rises and falls by the same range as the water depth fluctuation range, the shorter pumping pipe 1a is not necessary, but in this case, the level at the top of the better pumping pipe 1b will be higher at the highest water level. Therefore, the height of the ceiling of the septic tank has to be raised, which makes the septic tank that much bigger.
In addition, since the cost increases, in the embodiment shown in FIG. 2, when the liquid level rises above the support plate 8,
The 70-toe 2 provided on the support plate 8 hits the lower surface of the support plate 8 and is prevented from rising any further, thereby preventing the upper end of the long water pumping pipe 1b from becoming too high at the highest water level. Yes, when the liquid level is higher than the support plate 8, the longer pumping pipe 1
The water is pumped up using the shorter pumping pipe 1a instead of the pumping pipe 1a, and as a result, there is no need to increase the height of the ceiling of the septic tank. In the embodiment shown in FIG. 2, the vertical movement range of the longer pumping pipe 1b is set to 1/2 of the water level fluctuation range.

In the attached drawings, reference numeral 15 denotes a flow rate adjustment space, and a return notch 17 is provided in the side wall 16 located above the first tank 4 of this flow rate adjustment space 15 to adjust the flow rate IF4. A notch 19 for advection is provided in the side wall 18 located above the second tank 6. The lower end of the return notch 17 is located below the lower end of the advection notch 19. The sewage in the first tank 4 pumped up by the air lift pump flows into the flow rate adjusting device 15 from the outlet 20 at the upper end of the pumping pipe 1, and a part of it flows from the advection notch 19 into the second tank 4. [6, but most of it is returned to the first tank 4 from the return notch 17.

Note that in the attached drawings, W and L indicate water levels.

[Effect of the invention 1] In the present invention, a 70-toe for floating the pumping pipe is provided in the pumping pipe, and an air discharge port is provided in the pumping pipe, and the distance between the air discharge port and the liquid level is kept constant.
When the water level fluctuates, the 70-t moves up and down in response to this, causing the pumping pipe to move up and down.Even when the water level fluctuates, the distance between the air outlet and the liquid level remains constant, and the amount of water pumped by the air lift remains constant. As a result, the drive part of the air pump can be installed away from the tank.
The air lift pump has the characteristics of being resistant to clogging, easy to maintain and clean, and inexpensive, while also being able to ensure the quantitative quality of the amount of water pumped by the air lift pump even when the depth of sewage varies.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are front and side views of one embodiment of the present invention, and Figures 2 (a), (b), (c), (d) and (e) are views of another embodiment of the present invention. The operation explanatory diagram, FIG. 3, is a perspective view of the same as above, in which 1 is a pumping pipe, 2 is a 70-t, and 3 is an air discharge port. Agent Patent attorney Ishi 1) Ai 71... Lifting pipe (a) (b)

Claims (2)

[Claims] (1) A water pumping device for sewage treatment, characterized in that a pumping pipe is provided with a 70-hole for floating the pumping pipe, an air discharge port is provided in the pumping pipe, and the distance between the air discharge port and the liquid level is constant. (2) The sewage according to claim 1, wherein the pumping pipe is made up of a plurality of pipes each having a constant pumping amount and having different lengths, and the plurality of pumping pipes each share the width of the water level to be pumped. Pumping equipment in processing.