JP2869697B2 - Gate valve in vacuum valve mass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve mass gate valve installed in a vacuum valve mass of a vacuum sewage collection system.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a sewage collection station 2 provided with a vacuum pump 1 and an outlet 4A of a vacuum valve 4 disposed in a vacuum valve mass 3 are connected to a gate valve 5 in a vacuum valve mass. And an inlet 4B of the vacuum valve 4 via a suction pipe 8 to a sewage mass 7 disposed below the vacuum valve mass 3 and a sewage source 10
The sewage generated in the above is caused to flow down to the sewage mass 7 by a natural downflow pipe (drain pipe) 11, and a ventilation pipe 13 for introducing air into the vacuum valve 4 and the vacuum valve control means 12, and a water level detection pipe 14 are provided. Vacuum sewage collection systems are known.

[0003] In this vacuum type sewage collection system, household 9
Sewage (domestic wastewater, sewage) generated at sewage generation source 10
Flows down to the wastewater mass 7 through the natural downflow pipe 11.
When the water level of the sewage cell 7 rises, the air pressure in the water level detection pipe 14 rises. This increase in air pressure is caused by the air pressure introduction pipe 15.
The vacuum valve control means 12 controls the air pressure guided from the atmosphere as a pressure medium for operating the vacuum valve 4 through the ventilation pipe 13 to open the vacuum valve 4. . As a result, due to the pressure difference between the atmospheric pressure acting on the sewage in the sewage mass 7 via the ventilation pipe 13 and the outflow pipe 6, the sewage in the sewage mass 7 is changed from the suction pipe 8 to the open vacuum valve. The liquid is sucked into the outflow pipe 5 through the path 4. As a result, the sewage is substantially discharged from the sewage mass 7 and the sewage level drops to a level lower than the lower end opening of the suction pipe 8.
The air introduced into the sewage mass 7 from the sewage is supplied to the suction pipe 8, the open vacuum valve 4, and the outflow pipe 6 following the preceding sewage.
, And flows down to the sewage collection station 2 as an air-water mixed flow with sewage.

On the other hand, during the above-described operation, the sewage is substantially discharged from the sewage mass 7 and the sewage level falls to a level lower than the lower end opening of the suction pipe 8, so that the air pressure in the water level detection pipe 14 is reduced. Is reduced to substantially the atmospheric pressure, the pressure is transmitted to the vacuum valve control means 12 through the air pressure introducing pipe 15. Since the vacuum valve control means 12 has a built-in delay mechanism for delaying the operation timing of the vacuum valve 4, even if the air pressure in the water level detection pipe 14 is reduced to almost the atmospheric pressure, the vacuum valve 4 is immediately closed. Instead, the vacuum valve 4 is closed when the air / water mixing ratio of the sewage and air reaches a predetermined value.

[0005] By the way, the conventional gate valve 5 inside the vacuum valve mass.
The gate valve inlet 5A concentrically connected to the outlet 4A of the vacuum valve 4 and the gate valve outlet 5B concentrically connected to the inlet 6A of the outflow pipe 6 are on the same axis (horizontal axis). The joint between the outlet 4A and the outlet 6A of the outlet pipe 6 is shown in FIG.
, A rubber ring receiving type shown in FIG. 7, or a socket type shown in FIG.

In the above-mentioned conventional joint structure, the flange type shown in FIG. 6 is provided with flanges on the outlet 4A side of the vacuum valve 4 and the inlet 6A side of the outlet pipe 6, and these flanges, the flange on the gate valve inlet 5A side and the gate valve. Since the flange on the outlet 5B side is fastened by the fastening member 16 composed of a bolt and a nut, a space for removing the bolt and the nut is required, and the length L in the horizontal axis direction is increased accordingly.
There is a disadvantage that it cannot be installed on a small valve mass due to space restrictions.

On the other hand, the rubber ring receiving type shown in FIG. 7 or the socket type shown in FIG. 8 does not require the fastening member 16 used in the flange type of FIG. The length L in the direction is slightly reduced, so that restrictions on space are eased. Therefore, installation on a small valve mass can be expected. However, when performing the maintenance after the installation of the gate valve 5 in the vacuum valve mass, when removing the gate valve 5 in the vacuum valve mass, for example, it is necessary to perform a complicated operation of cutting the outflow pipe 6. That is, there is a drawback that it is extremely difficult to remove the gate valve 5 in the vacuum valve mass.

[0008]

The problem to be solved is that the flange type joint structure has a large length in the horizontal axis direction, so that it can be installed on a small valve mass due to space restrictions. However, when the joining structure is a rubber ring receiving type or a socket type, it is extremely difficult to remove it for maintenance or the like.

[0009]

SUMMARY OF THE INVENTION The present invention is a vacuum valve mass gate valve installed in a vacuum valve mass of a vacuum type sewage collection system adjacent to the outlet side of a vacuum valve. The axis of the gate valve inlet connected concentrically and the axis of the gate valve outlet concentrically connected to the inlet side of the outflow pipe led out of the vacuum valve mass are orthogonal to each other, and either the gate valve inlet or the gate valve outlet is used. One of the outer diameters is set to the same diameter as the outer diameter of the outlet of the vacuum valve or the inlet of the outlet pipe, and the other inner diameter of the gate valve inlet and the gate valve outlet is the outlet of the vacuum valve or the inlet of the outlet pipe. Liquid-tight and is set to a size that can be detachably fitted, and portions having the same diameter are liquid-tightly and separably fastened by the annular fastening member movable in the axial direction, Eases restrictions on space and installs in a small valve mass While allowing to achieve the purpose of facilitating the removal of the time to maintenance or the like.

[0010]

According to the present invention, since the axis of the gate valve is orthogonal to the axis of the gate valve outlet, the length in the horizontal axis direction is reduced. Further, after the annular fastening member is moved in the axial direction to release the fastening, the simple operation of moving the vacuum valve mass in the axial direction perpendicular to the moving direction of the annular fastening member allows the vacuum valve mass gate valve to be moved. Can be easily removed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. 1 and 2
In the vacuum valve mass gate valve 5, a gate valve inlet 5A is provided on a horizontal axis C1, and a gate valve outlet 5B is provided on a vertical axis C2 orthogonal to the horizontal axis C1. Is concentrically connected to the outlet 4A of the vacuum valve 4,
The gate valve outlet 5B is concentrically connected to the inlet 6A of the outflow pipe 6.

The outside diameter D1 of the gate valve inlet 5A is set to be the same as the outside diameter D2 of the outlet 4A of the vacuum valve 4, and the inside diameter D3 of the gate valve outlet 5B is smaller than the outside diameter D4 of the inlet 6A of the outflow pipe 6. The size is set to be large enough to fit the inlet 6A of the outflow pipe 6 in a liquid-tight and detachable manner. Also, gate valve inlet 5A
The outlet 4 of the vacuum valve 4 is fastened liquid-tightly and separably by an annular fastening member (sleeve, for example) 17 movable in the direction of the horizontal axis C1. That is, gate valve inlet 5A
2 and the outlet 4A of the vacuum valve 4 are fastened and joined by positioning the annular fastening member 17 across the two 5A and 4A as shown by solid lines in FIGS. As shown by the phantom line, by moving the gate valve 5 in the vacuum valve mass to the valve box 5C side, the two can be separated from each other 5A and 4A. Sealing rings (O-rings) 18 are provided on the inner periphery of the gate valve outlet 5B, and when the inlet 6A of the outlet pipe 6 is fitted, the seal rings 18 are connected to the inlet 6A of the outlet pipe 6. It is configured so as to be able to maintain liquid tightness in close contact with the device.

In the above configuration, since the axis C1 of the gate valve inlet 5A and the axis C2 of the gate valve outlet 5B are orthogonal to each other,
The length L1 in the horizontal axis direction of the gate valve 5 in the vacuum valve mass is shorter than the length L in the horizontal axis direction of the conventional gate valve 5 in the vacuum valve mass. Therefore, restrictions on space are alleviated, and installation on a small valve mass becomes possible. In addition, even if the height H of the outflow pipe 6 fluctuates somewhat, this fluctuation is caused by the inlet 6A of the outflow pipe 6.
Can be absorbed by adjusting the dimension of the short pipe 6a constituting the above.

On the other hand, when the vacuum valve mass partitioning valve 5 is to be removed for maintenance or the like after the installation of the vacuum valve mass partitioning valve 5, the annular fastening member 1 in the solid line position in FIG.
7 is moved to the valve box 4C side to the position indicated by the imaginary line, and after the fastening by the annular fastening member 17 is released, the gate valve 5 in the vacuum valve mass can be removed very easily by a simple operation of pulling it upward. .

FIGS. 3 and 4 show another embodiment of the present invention, in which the outer diameter D5 of the gate valve outlet 5B is set to the same diameter as the outer diameter D4 of the inlet 6A of the outflow pipe 6, and the gate valve outlet 5B is connected to the gate valve outlet 5B. The inlet 6A of the outflow pipe 6 is liquid-tightly and separably fastened by an annular fastening member 17 movable in the direction of the vertical axis C2, and the gate valve inlet 5A.
Of the vacuum valve 4 is slightly larger than the outer diameter D2 of the outlet 4A of the vacuum valve 4, and the outlet 4A of the vacuum valve 4 is set to have a size that can be fitted in a liquid-tight and detachable manner.

Even in such a structure, the length L1 in the horizontal axis direction of the gate valve 5 in the vacuum valve mass is similar to the above-described embodiment.
Is shorter than the length L in the horizontal axis direction of the conventional gate valve 5 in the vacuum valve mass. Therefore, restrictions on space are alleviated, and installation on a small valve mass becomes possible. When the vacuum valve mass isolation valve 5 is to be removed for maintenance or the like after the installation of the vacuum valve mass isolation valve 5, the annular fastening member 17 at the solid line position in FIG. After being moved to the 4C side and the fastening by the annular fastening member 17 is released, it can be removed very easily by a simple operation of slightly moving the gate valve 5 inside the vacuum valve mass in a direction away from the vacuum valve 4.

[0017]

As described above, according to the present invention, since the axis of the gate valve is perpendicular to the axis of the gate valve outlet, the length in the horizontal axis direction is reduced. This alleviates space constraints and enables installation on a small valve mass.
In addition, after the annular fastening member is moved in the axial direction to release the fastening, the simple operation of moving the vacuum valve mass gate valve in the axial direction perpendicular to the moving direction of the annular fastening member,
The gate valve in the vacuum valve mass can be removed very easily.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of an installation state of a gate valve in a vacuum valve mass of the present invention.

FIG. 2 is an enlarged view showing an example of a gate valve in a vacuum valve mass according to the present invention in a partial cross section.

FIG. 3 is a configuration diagram showing another example of the installation state of the gate valve in the vacuum valve mass of the present invention.

FIG. 4 is an enlarged view showing another example of the gate valve in the vacuum valve mass according to the present invention in a partial cross section.

FIG. 5 is a configuration diagram of a vacuum type sewage collection system.

FIG. 6 is a configuration diagram of a flange type vacuum valve mass gate valve.

FIG. 7 is a configuration diagram of a rubber ring receiving type vacuum valve mass gate valve.

FIG. 8 is a configuration diagram of a socket valve type vacuum valve mass gate valve.

[Explanation of symbols]

 3 Vacuum valve mass 4 Vacuum valve 4A Vacuum valve outlet 5 Vacuum valve mass gate valve 5A Gate valve inlet 5B Gate valve outlet 6 Outflow pipe 6A Outlet pipe inlet 17 Annular fastening member C1 Axis of gate valve inlet C2 Gate valve outlet Axis D1 Outer diameter of inlet of gate valve D2 Outer diameter of outlet of vacuum valve D3 Inner diameter of outlet of gate valve D4 Outer diameter of inlet of outlet pipe D5 Outer diameter of outlet of gate valve D6 Inner diameter of inlet of gate valve

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E03F 3/00 E03F 3/02 E03F 5/22 E03F 7/00

Claims (1)

(57) [Claims] 1. A gate valve in a vacuum valve mass installed adjacent to an outlet side of a vacuum valve in a vacuum valve mass of a vacuum type sewage collection system, wherein the gate valve is concentrically connected to an outlet of the vacuum valve. The axis of the inlet and the axis of the gate valve outlet concentrically connected to the inlet side of the outflow pipe led out of the vacuum valve mass are orthogonal to each other, and the outside diameter of one of the gate valve inlet and the gate valve outlet is the vacuum. The outer diameter of the outlet of the valve or the inlet of the outlet pipe is set to be the same diameter, and the other inner diameter of the gate valve inlet and the outlet of the gate valve is liquid-tightly and detachably fitted to the outlet of the vacuum valve or the inlet of the outlet pipe. A gate valve in a vacuum valve mass, wherein the gate valve is set to a size that allows it, and portions having the same diameter are fastened liquid-tightly and separably by the annular fastening member movable in the axial direction.