JPH04161624A - Vacuum valve unit component - Google Patents

Abstract

PURPOSE:To reduce construction costs by arranging a frame supported by means of a ring-like body in the inside of the ring-like body made of concrete, which is a part of the side wall of a vacuum valve unit, and mounting the vacuum valve on the frame. CONSTITUTION:A frame 52 is joined to a ring-like body 50 made of concrete by an anchor bolt or the like. A suction pipe body 54 is attached to the frame 52 by a U bolt, and a vacuum valve 32 is connected to the suction pipe body 54. In addition, the vacuum valve 32 is connected to a gate valve 56, to which a flow-out pipe 60 is connected through a three way coupling 58. In addition, a gate valve 62 and by-pass pipe body 64 are connected to the three way coupling 58, forming a vacuum valve unit component 48.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to parts for constructing a vacuum valve unit (relay unit) of a vacuum sewerage system.

[Prior Art] Vacuum sewerage is a system that creates a vacuum (not a complete vacuum, but refers to a reduced pressure state) inside a sewer pipe, and collects wastewater within the sewer pipe using the pressure difference between the sewer pipe and the atmosphere.

Figure 5 shows an example of the configuration of this vacuum sewerage system.

Wastewater discharged from sanitary facilities such as homes and factories is inflow pipe 8.
It flows into the vacuum valve unit (relay unit) 10. From this vacuum valve unit 10, the water is sent to a vacuum station 16 via a vacuum sewer pipe 14, and from a pressure pump 18 to a pressure feed pipe 20 to a sewage treatment facility.

In this vacuum station 16, the sewage circulation pump 22 supplies the sewage in the receiving tank 24 to the ejector 26, thereby evacuating the vacuum sewer pipe 14 and collecting the sewage in the vacuum station 16.

Vacuum valve unit 10 connects the waste water source and vacuum station 16
A tank body 28 into which sewage flows from the inflow pipe 8, a suction pipe 30 for sucking the sewage in the tank body 28 and sending it to the vacuum sewer pipe 14, and the suction pipe 30, a controller 34 for operating the vacuum valve 32, and the like. This vacuum valve 32 uses the negative pressure within the vacuum sewer pipe 14 as a driving power source.

6 to 8 are explanatory diagrams of the details and operation of this vacuum valve unit 10. As shown in FIGS. 6 and 7, when wastewater flows into the tank body 28, the water level in the tank body 28 gradually rises. As the water level rises, the air pressure trapped inside the pressure transmission pipe 36 rises, and when this air pressure exceeds a threshold value, the diaphragm activator provided in the controller 34 opens, and the negative pressure inside the vacuum sewer pipe 14 increases. Pressure is transmitted via vacuum tube 31 to vacuum valve 32 .

As a result, the waste water in the tank body 28 is sucked out from the suction pipe 30 to the vacuum sewer pipe 14.

When the waste water in the tank body 28 is sufficiently pumped out and the water level in the tank body 28 becomes lower than the lower end of the pressure transmission pipe 36, the pressure in the pressure transmission pipe 36 decreases and the vacuum valve 32 closes.

Note that when the wastewater is sucked out from the suction pipe 30, air is taken in through the air pipe 38, and the wastewater is sucked into the vacuum sewer pipe 14 as a gas-liquid multiphase flow.

These air bubbles airlift the wastewater at an upwardly sloped airlift portion 14a provided at a suitable location in the vacuum sewer pipe 14. In this way, by combining the evacuation and the air lift effect, wastewater can be sent stably even over long distances.

Vacuum sewage collection systems do not require continuous gradients like gravity flow sewers when constructing pipes, and have the following characteristics.

■Since the depth of the pipeline is shallow, pipe construction costs can be significantly reduced.

■Enables sewerage construction in areas where it has been difficult to install sewerage lines due to high groundwater levels, rock formations that make excavation difficult, etc.

■Easy to install on curved alleys, etc.

■Also, because the gas-liquid mixed phase is forced to be collected at high speed intermittently using a vacuum, there is no need to worry about clogging the pipe, and piping with a small diameter is possible.

6 to 8, the controller 34 having a diaphragm activator is used, but as shown in FIG. 9, a float 42 is floated along the rod 40, thereby activating the water level detector 44 as a controller. It is structured as follows.

The tank body 28 of the vacuum valve unit 10 is conventionally made of concrete or FRP (glass fiber reinforced plastic).

[Problems to be Solved by the Invention] A tank body made of FRP cannot sufficiently withstand the large earth pressure it receives when buried underground.

The concrete tank body is heavy.

It is necessary to divide it into several ring-shaped rings. Conventionally, after assembling the tank body on-site, vacuum valves, controllers, etc. were assembled inside.
The amount of assembly work on site increased significantly, making it inevitable to increase costs and lengthen the construction period.

[Means for Solving the Problems] The vacuum valve unit part of the present invention is a part that constitutes a part of a vacuum valve unit for a vacuum sewer, and is a part made of concrete that constitutes a part of a side wall of the vacuum valve unit. The device includes an annular body, a frame disposed inside the annular body and supported by the annular body, and a vacuum valve attached to the frame.

[Function] In the vacuum valve unit parts of the present invention, the main equipment of the vacuum valve unit is assembled to the concrete annular body, so the amount of on-site assembly work is extremely small.

[Example] Fig. 1 is a plan view of parts for a vacuum valve unit according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a vacuum after assembly. A sectional view of the parts for the valve unit, FIG. 4 is a perspective view of the bottom of the annular body.

This vacuum valve unit part 48 includes a concrete annular body 50, a frame 52 fixed to the annular body 50 with anchor bolts, etc., and a U-bolt 5 attached to the frame 52.
The suction pipe main body 54 attached at 3 and the suction pipe main body 5
4, a gate valve 56 connected to the vacuum valve 32, an outflow pipe 60 connected to the gate valve 56 via a three-way joint 58, and a gate connected to the three-way joint 58. It includes a valve 62 and a bypass pipe main body 64.

To construct a vacuum valve unit using the vacuum valve unit parts 48, place the straight cylindrical frame block 68 on the bottom plate 66 as shown in FIG. Then, the inclined wall block 70, the adjustment ring 72, and the manhole receiving frame 74 are sequentially placed thereon. Note that the joints between the bottom plate 66 and the block 68 or between the block 68 and the vacuum valve unit 48 are filled with joint mortar.

Thereafter, the suction pipe 30 is connected to the suction pipe main body 54, and the air pipe 38 is further connected to the suction pipe 30.

Further, a rod 40 is attached to the frame 52, and a water level detector 44 and a float 42 are attached to the rod 40.

Further, a bypass pipe 66 is connected to the bypass pipe main body 64.

Thereafter, the inflow pipe 8 and the vacuum sewer pipe 14 are connected to the vacuum valve unit, and finally a manhole cover is placed.

In this way, when the vacuum valve unit parts 48 are used, the amount of construction work on site is significantly reduced.

Further, by assembling the main parts to the annular body 48 at a factory, the assembly can be performed accurately.

Although a ball float rod type water level detector is used in the above embodiment, a diaphragm activator shown in FIGS. 6 to 8 may also be used.

[Effects of the Invention] As described above, according to the parts for a vacuum valve unit of the present invention, the construction work of the vacuum valve unit on site is extremely reduced, and the labor cost of the construction work can be reduced and the construction period can be shortened. Also, by assembling complex parts in a factory, the reliability of the vacuum valve is improved.

[Brief explanation of drawings]

Fig. 1 is a plan view of parts for a vacuum valve unit according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a part of the vacuum valve unit after assembly is completed. FIG. 4 is a perspective view of the bottom of the annular body. FIG. 5 is a system diagram of a vacuum sewer system, FIGS. 6, 7, and 8 are explanatory diagrams of the operation of a conventional vacuum valve unit, and FIG. 9 is a sectional view of another conventional vacuum valve unit. 10... Vacuum valve unit, 32... Vacuum valve, 50...
...Annular body, 52...Frame. Agent Patent Attorney Tsuyoshi Shigeno Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] A part constituting a part of a vacuum valve unit of a vacuum sewer, comprising: a concrete annular body constituting a part of a side wall of the vacuum valve unit; and a part disposed inside the annular body, A vacuum valve unit part comprising: a frame supported by the annular body; and a vacuum valve attached to the frame.