JP2001329999A - Fluid transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid transfer device for constant flow rate with simple structure, low cost, less limitation to an installation place, and simple control. SOLUTION: A return pipe 140 for changing the flow of fluid from the rising flow within a lifting pipe 110 to almost the horizontal flow is installed in a fluid transfer opening part in the upper part of the lifting pipe, a first fluid return opening 141 formed by opening the upper part of the return pipe in almost the perpendicular direction to the flow of the fluid within the return pipe is installed and a second fluid return opening 143 is arranged over a weir 142 installed in almost the horizontal flow direction of the fluid, and a fluid transfer opening 144 is arranged between the first fluid return opening and the second fluid return opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a fluid transfer device. The present invention relates to an apparatus for transferring fluid by lowering the apparent specific gravity in a pipe by discharging air in a pumping pipe as a means for transferring fluid, and relates to a fixed-quantity fluid transfer apparatus which is hardly affected by a fluid pumping height.

[0002]

2. Description of the Related Art In a sewage treatment tank, the inside of the tank is divided into a plurality of treatment tanks by partitioning as necessary from the viewpoint of sewage treatment performance.
Each treatment tank is configured to perform a role related to each water treatment. In such a sewage purification tank, in order to secure stable sewage purification performance, it is preferable to perform treatment while stabilizing the amount and load of sewage flowing into the tank. However, sewage septic tanks use differently depending on each,
Also, the frequency, amount and load of wastewater inflow vary.

[0003] Therefore, in order to ensure stable sewage purification performance, a part of the tank upstream of the divided treatment tanks is made to function as an inflow load regulating tank for stabilizing the inflow load, and the inflow from the next tank and thereafter is controlled. In order to stabilize the amount, a fluid transfer device is arranged in the advancing section of the inflow load adjusting tank so as to stabilize and enhance the processing performance.

[0004] As this fluid transfer device, an air lift pump for pumping up the fluid by lowering the apparent specific gravity of the fluid in the pumping tube by discharging air into a pumping tube opened into a fluid storage tank by an air tube. However, it is widely used as a sewage purification tank used for homes and the like because it has no movable parts, has few failures, and the amount of water transfer can be freely changed by adjusting the amount of air.

However, in this air lift pump, it is known that, due to its nature, the transfer amount is strongly affected by the fluid pumping height and is inversely proportional to the fluid pumping height.
It is difficult to use as a stable quantitative transfer device,
It was necessary to add a special quantification mechanism in order to provide quantification.

As a quantification mechanism, an air lift pump is constituted by a two-stage type, a fluid is pumped up to a predetermined height by a preceding air lift pump, and a fluid pumped to a predetermined height is further pumped up by a subsequent air lift pump. There has been proposed a configuration in which the transfer amount is stabilized by transferring, or a configuration in which the pumped fluid is transferred at a constant flow rate by a flow rate adjusting basin.

[0007]

However, although stabilization of the amount of transferred water can be achieved by using a two-stage air lift pump or a flow rate adjusting basin, quantitative control can be obtained, but the mechanism is complicated and the management method is also complicated. Needless to say. In addition, since the number of parts increases, there are also problems related to an increase in the number of assembly steps and an increase in cost. Further, since the mechanism is relatively large, there are also problems with the arrangement of the apparatus, the pipe layout, and the like.

One object of the present invention is to provide a fluid transfer device having a constant flow rate, which can be realized at a low cost with a simple structure, has less restrictions on an installation place, and can be simplified in management. Is to do.

It is another object of the present invention to provide a fluid transfer device in which the transfer amount can be easily adjusted.

[0010]

According to the present invention, an air pipe capable of discharging air into the pumping pipe is installed inside a pumping pipe opened in the fluid storage tank, and air is discharged into the pumping pipe. In a fluid transfer device that lowers the apparent specific gravity of the fluid in the pumping pipe to pump the fluid, the flow of the fluid is changed from a rising flow in the pumping pipe to a flow in a substantially horizontal direction at the fluid transfer port portion above the pumping pipe. A first fluid return port having an opening at the top of the return pipe substantially perpendicular to the flow direction of the fluid in the return pipe, and a weir provided in the flow direction of the fluid in a substantially horizontal direction. A second fluid return port is provided above, and a fluid transfer port is provided between the first fluid return port and the second fluid return port.

[0011] A scour weir is provided between the first fluid return port and the fluid transfer port.

Further, a first fluid transfer amount adjusting mechanism is provided which is capable of changing a fluid transfer amount by adjusting an amount of air supplied from the air pipe into the pumping pipe.

The fluid transfer port is provided with a second fluid transfer port which is capable of adjusting a fluid transfer amount by changing the height of an outlet by rotating the fluid transfer port about a flow direction in a substantially horizontal direction. It is characterized in that an amount adjusting mechanism is provided.

[0014] Further, the first fluid transfer amount adjusting mechanism in which the amount of fluid transferred can be changed by adjusting the amount of air supplied from the air pipe into the pumping pipe, and the flow direction of the fluid in a substantially horizontal direction are set as axes. A second fluid transfer amount adjusting mechanism is provided, which is capable of adjusting the fluid transfer amount by changing the height of the outlet of the fluid transfer port by rotating the fluid transfer port.

[0015]

FIG. 1 is a vertical sectional side view of a sewage treatment tank provided with a fluid transfer device according to the present invention.

In this sewage purification tank, a plurality of treatment tanks are formed by partitioning the inside of the purification tank housing 1 with a partition 2.

The first anaerobic filter bed tank 3 stores the sewage flowing from the inflow port 4 and performs anaerobic treatment, and has a high water level (HW.
L) and a low water level (LWL) so as to have a function of a buffer tank for stabilizing the amount of sewage transferred to the subsequent treatment tank. And this first
The sewage stored in the anaerobic filter tank 3 is pumped up by the fluid transfer device 100 and transferred to the second anaerobic filter tank 5. In this embodiment, the fluid transfer device 100 is used for the transfer of sewage from the first anaerobic filter tank 3 to the second anaerobic filter tank 5. 2 It can be installed at any one of the advection sections in the anaerobic filter bed tank 5, the aerobic filter bed tank 6, the treatment water tank 7, or at a plurality of locations.

The fluid transfer device 100 has a lower portion formed in a U-shape, and the suction port 111 is located at a level lower than the low water level and discharges air to a pumping pipe 110 which is opened to discharge air inside the pumping pipe 110. In this configuration, the apparent specific gravity of the sewage (fluid) is reduced to pump up the sewage. Further details will be described later.

The sewage transferred to the second anaerobic filter bed tank 5 is anaerobically treated in the second anaerobic filter bed tank 5 and then transferred to the aerobic filter bed tank 6 for aerobic treatment. It is discharged from the outlet 9 via the disinfection tank 8.

The fluid transfer device 100 is required to have durability in the environment in which it is used. Therefore, although it depends on the environment in which it is used, it is preferable to use metal, specifically, stainless steel, aluminum, aluminum alloy, steel, or the like, for the material of the components.
In addition, plastics, specifically, polyethylene, polypropylene, polybutene, vinyl chloride, and the like are materials suitable for use as piping. Each component can be joined by screwing, welding (welding), bonding, or the like.

FIG. 2 is a longitudinal sectional side view of a fluid advancing port portion of the fluid transfer device 100, FIG. 3 is an external perspective view thereof, and FIG.
Is an exploded perspective view thereof.

A pumping tube 110 having a lower portion formed in a U-shape and having a suction port 111 opened at the tip thereof is fitted with an air lift cheese 120 at the upper end. The air pipe 130 for discharging air into the pumping pipe 110 is provided by the air lift cheese 1.
20 is inserted and installed concentrically in the pumping pipe 110 through the pump 20, and air is supplied from the air supply pipe 131 through the control valve 132. Fumarole 133 at the end of air tube 130
Although it depends on the pumping height, it is preferable to open the nozzle at a position lower than the low water level (LWL) by 250 mm or more so as to discharge air to the position. And pumping pipe 1
It is desirable that the U-shaped portion 10 is located at a position lower than the suction port 111 by 270 mm or more. A gap is provided between the inner circumferential surface of the water pump 110 and the air lift cheese 120 and the outer circumferential surface of the air tube 130 for raising and pumping up the discharged air and dirty water. The air pipe 1
The pipe 30 can be deformed so as to be piped to the outside of the water pipe 110 and the air lift cheese 120 and to be inserted from the lower side surface of the water pipe 110.

The air lift cheese 120 is provided with a cylindrical return pipe 140 for integrally changing the flow of the pumped sewage from a rising flow in the pumping pipe 110 to a flow in a substantially horizontal direction, or is connected to another part. Provided by The return pipe 140 is provided at a predetermined flow rate for the wastewater pumped up from the first anaerobic filter bed tank 3 by the pumping pipe 110 at the second stage in the next stage.
Excess sewage is returned to the first anaerobic filter bed tank 3 while being transferred to the anaerobic filter bed tank 5, and the upper part of the return pipe 140 is cut off in a direction substantially perpendicular to the flow direction of the sewage in the return pipe 140. A first sewage return port 141 opened at the end, a second sewage return port 143 formed on a weir 142 provided at an end of the sewage flow in the substantially horizontal direction, and the first sewage return port 14
A sewage transfer port 144 formed by cutting out a horizontal portion between the first and second sewage return ports 143, and the first sewage return port 14;
And a sewage weir 145 provided between the wastewater transfer port 1 and the wastewater transfer port 144.

The sewage transfer port 144 is rotatably and elastically fitted to the outer periphery of the return pipe 140 with an arcuate fitting portion, or the second sewage return of the return pipe 140 with an annular fitting portion. The transfer port cover 146 is rotatably fitted to the return pipe 140 from the direction of the port 143. This transfer port cover 146 has a transfer gutter 14 connected to the sewage transfer port 144.
7 is provided so that the sewage in the return pipe 140 flows out from the sewage transfer port 144 through the transfer gutter 147 toward the second anaerobic filter bed tank 5. The transfer port cover 146 rotatably fitted to the return pipe 140 changes the height of the outlet of the transfer gutter 147 by rotating the transfer port cover 146 so that the transfer water amount can be adjusted.

The shape of the transfer gutter 147 is preferably a cylindrical shape having an open upper portion, a substantially cylindrical shape, or a rectangular tube shape (triangular shape) in order to improve the cleaning performance. The shape of the return pipe 140 can be substantially cylindrical or rectangular. The shape of the weir 142 attached to the second sewage return port 143 is a horizontal weir, but may be a triangular weir, trapezoidal weir, or circular weir.

In such a sewage treatment tank, sewage is supplied to the inlet 4
From the first anaerobic filter bed tank 3 to a high water level (HW.
(L) and low water level (LWL). Then, the fluid transfer device 100 connects the air pipe 13 from the air supply pipe 131 through the adjustment valve 132.
By discharging air into the pumping pipe 110 from the blast port 133 by supplying air to the exhaust pipe 133, the apparent specific gravity of the sewage in the pumping pipe 110 is reduced, and the sewage is raised and pumped up. When the pumped-up sewage reaches the inside of the airlift cheese 120, it is separated into gas and liquid, flows into the return pipe 140, and flows out from the sewage transfer port 144 through the transfer gutter 147 to the second anaerobic filter tank 5. At this time, the sewage transfer port 144 in the return pipe 140
The water level of the sewage at the position of the first sewage return 141 and the second sewage return
142 provided at the sewage return port 143 of the country
, The amount of sewage flowing out through the transfer gutter 147 has a constant flow rate.

The flow rate of sewage pumping in the fluid transfer device 100 is adjusted by controlling the amount of supplied air by a control valve 132, and the amount of transfer to the second anaerobic filter bed tank 5 is controlled by rotating the transfer port cover 146 and transferring the transfer gutter. Adjust by changing the height of the 147 outlet.

The sewage flowing into the second anaerobic filter bed tank 5 at a constant flow rate is further anaerobically treated, then transferred to the aerobic filter bed tank 6 for aerobic treatment, and further passed through the treated water tank 7 to the disinfection tank 8. It is sterilized and discharged from the outlet 9.

The sewage transfer amount of the fluid transfer device 100 is as follows.
A first fluid transfer amount adjusting mechanism or a transfer port cover 14 for adjusting the amount of air supplied to the pumping pipe 110 by an adjusting valve 132.
This can be realized by one or a combination of two or more second fluid transfer amount adjusting mechanisms that change the height of the outlet of the transfer gutter 147 provided in the transfer port cover 146 by rotating the transfer port cover 146.

Since the size of the fluid transfer device 100 is not much different from that of a conventionally used fluid transfer device, no special consideration is required for the installation location. No new air source is required because it is smaller than that of the flow rate adjusting type. Therefore, it is possible to directly mount the filter on the conventional sewage purification tank, and the mounting position is not limited to the transfer section from the first anaerobic filter tank 3 to the second anaerobic filter tank 5 but also considers the flow control capacity and arrangement. Then, it can be installed in another advection section, and can also be installed later in a sewage purification tank having no flow rate adjusting function.

[0031]

According to the present invention, since the return pipe and the transfer port are formed in the return pipe through which the contaminated sewage flows in the horizontal direction, the structure is simple and can be realized at low cost. It is possible to provide a fluid transfer device having a constant flow rate with few restrictions and capable of simplifying management.

Further, it is possible to provide a fluid transfer device in which the transfer amount can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a sewage purification tank provided with a fluid transfer device of the present invention.

FIG. 2 is a vertical sectional side view showing one embodiment of the fluid transfer device of the present invention.

FIG. 3 is an external perspective view of the fluid transfer device shown in FIG. 2;

FIG. 4 is an exploded perspective view of the fluid transfer device shown in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Septic tank housing, 3 ... 1st anaerobic filter bed tank, 4 ... Inlet, 5
... second anaerobic filter bed tank, 6 ... aerobic filter bed tank, 7 ... treated water tank, 8
... disinfection tank, 9 ... outlet, 100 ... fluid transfer device, 110
... pumping pipe, 111 ... suction port, 120 ... air lift cheese, 130 ... air pipe, 131 ... air supply pipe, 132 ... control valve, 133 ... fume port, 140 ... return pipe, 141 ... first wastewater return port, 142 ... weir, 143 ... second sewage return port, 144 ... sewage transfer port, 145 ... digging weir, 146 ...
Transfer port cover, 147 ... Gutter.

Claims (5)

[Claims] An air pipe capable of discharging air into the pumping pipe is provided inside a pumping pipe opened in the fluid storage tank, and the apparent specific gravity of the fluid in the pumping pipe is reduced by discharging air into the pumping pipe. In the fluid transfer device for lowering and pumping up the fluid, a return pipe for changing a flow of the fluid from an ascending flow in the pump pipe to a flow in a substantially horizontal direction is provided at the fluid transfer port portion above the pump pipe. A first fluid return port having an opening at the top of the return pipe substantially perpendicular to the flow direction of the fluid in the pipe, and a second fluid return port on a weir provided in the flow direction of the fluid in a substantially horizontal direction And a fluid transfer port is provided between the first fluid return port and the second fluid return port. 2. The fluid transfer device according to claim 1, further comprising a dimple weir provided between the first fluid return port and the fluid transfer port. 3. A first fluid transfer amount adjusting mechanism according to claim 1 or 2, wherein a first fluid transfer amount adjusting mechanism is provided which is capable of changing a fluid transfer amount by adjusting an amount of air supplied from said air pipe into the pumping pipe. Fluid transfer device. 4. The fluid transfer port according to claim 1, wherein the fluid transfer port is rotated about a direction in which the fluid flows in a substantially horizontal direction to change the height of the outlet to adjust the amount of fluid transfer. A fluid transfer device provided with a second fluid transfer amount adjusting mechanism. 5. A first fluid transfer amount adjusting mechanism according to claim 1 or 2, wherein a fluid transfer amount can be changed by adjusting an amount of air supplied from the air pipe into the pumping pipe, and a substantially horizontal direction of the fluid. Fluid having a second fluid transfer amount adjusting mechanism that changes the height of the outlet of the fluid transfer port by rotating about the flow direction of the fluid to the shaft, thereby enabling adjustment of the fluid transfer amount. Transfer device.