JP2794514B2 - Pipe intake / exhaust switching structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selects and executes, as required, the execution of intake or exhaust, the combined execution of intake and exhaust, or the stop of intake and exhaust for a water pipe such as a sewer pipe. The present invention relates to a pipe intake / exhaust switching structure that can be used.

[0002]

2. Description of the Related Art A technique for venting (exhausting) a water pipe 1 such as a drain pipe shown in FIG. 8 by an air valve (exhaust valve) 2 connected to the water pipe 1 is already known. The air valve 2 is connected to the water pipe 1 via the repair valve V. Therefore, by holding the repair valve V in the open position, it is possible to secure a state in which the exhaust of the water pipe 1 or the intake into the water pipe 1 is possible, and by holding the repair valve V in the closed position,
The stopped state of both the intake and the exhaust can be ensured.

By the way, the water pipe 1 is required to perform only intake, perform only exhaust, perform combined intake and exhaust, and stop intake and exhaust. However, in the intake / exhaust switching structure constituted by the conventional air valve 2 and the repair valve V, although the execution of the intake or exhaust and the stop of the intake / exhaust can be executed by the switching operation of the repair valve V, There is a disadvantage that the above-mentioned intake only or exhaust only cannot be executed independently, and there is a drawback that these requirements cannot be met.

[0004]

The problem to be solved is that it is not possible to independently execute only intake or only exhaust.

[0005]

According to a first aspect of the present invention, an air valve is mounted in communication with a water pipe, and a switching valve having an intake port and an exhaust port in an intake / exhaust hole of the air valve. And a first check valve for permitting intake to the water pipe to the intake port, and a second check valve for permitting exhaust from the water pipe to the exhaust port. With the valve attached, the purpose of independently executing only intake or exhaust only for the water pipe was achieved.

According to a second aspect of the present invention, a suction / exhaust port is provided in a water pipe, and a connection port of a switching valve having an intake port and an exhaust port is connected to the intake / exhaust port. A first check valve for allowing intake into the water pipe is attached to the intake port;
The exhaust port is provided with a second check valve that allows exhaust from the water pipe, thereby achieving the purpose of independently performing only intake or only exhaust on the water pipe.

[0007]

According to the first aspect of the present invention, by performing the switching operation of the switching valve, the execution of only intake, the execution of only exhaust, the combined execution of intake and exhaust, You can select to stop intake and exhaust.

According to the second aspect of the present invention, by performing the switching operation of the switching valve, the air valve is omitted and the execution of only the intake, the execution of only the exhaust, and the combined execution of the intake and exhaust are performed on the water pipe. And stop of intake and exhaust can be selected.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the first invention. In this drawing, an air valve 2 is attached to a water pipe 1 and attached to a valve box 2A, a float 3 housed inside the valve box 2A, and attached to the float 3 to extend upward. The valve stem 4 is connected to the valve stem 4 via a pin 5 and has a relative movement amount substantially corresponding to the length of the long hole 6 in the vertical direction, and is connected to the upper side of the valve stem 4. The valve body 7 is provided. The valve body 7 has a hollow shaft portion 7A provided with a small air hole 7a at a lower end portion, and a flange portion 7B formed to protrude radially outward at the lower end portion of the hollow shaft portion 7A. It is located in a valve box cover 8 detachably mounted on the upper part of the box 2A. Seal on top of valve box cover 8
An annular seal member 7b attached to the upper surface of the flange portion 7B of the valve body 7 is attached to a downwardly facing valve seat 9B in the vicinity of a valve hole 9A formed in the sheet receiver 9.
Are facing each other. A suction / exhaust chamber 10A communicating with the atmosphere through an intake / exhaust hole 10 is formed in the sheet receiver 9, and a diaphragm device 11 is mounted on an upper portion thereof. Further, the hollow shaft portion 7A is connected to the sheet receiving 9 through the valve hole 9A.
Is slidably inserted into the diaphragm device 11 through the suction / exhaust chamber 10A, and has a diaphragm 11A at its upper end.
The upper pressure chamber 11B is constantly urged in the valve closing direction (upward) by a spring 12, and communicates with the atmosphere via an air nozzle 11b.

On the other hand, a connection port 14 A of a switching valve 14 is connected to the intake / exhaust hole 10 of the air valve 2 via a pipe 13. The switching valve 14 is, for example, a rotary type switching valve having an intake port 14B and an exhaust port 14C, and a first check valve 15 for allowing the intake port 14B to intake air into the water pipe 1. And a second check valve 16 for permitting exhaust from the water pipe 1 is attached to the exhaust port 14C.

Next, the operation of the above configuration will be described. When the piping of the water pipe 1 is completed, the float 3 hangs down, the valve body 7 rises by the spring force of the spring 12, and the seal member 7b of the flange portion 7B is seated on the valve seat 9 of the sheet receiver 9. 9B, which is in close contact with the valve box 2A,
The communication with the exhaust chamber 10A is kept shut. For this purpose, the air in the water pipe 1 flows from the valve box 2A through the small air hole 7a of the valve body 7 to the diaphragm device 11.
Into the upper pressure chamber 11B, from which the air nozzle 11b
Exhaust (initial exhaust).

The work of filling the water pipe 1 causes the water pipe 1 to be filled.
When the air pressure in the valve box 2 increases, the pressure chamber 11B also increases in pressure, depresses the diaphragm 11A against the spring force of the spring 12, and also depresses the valve element 7 via the pin 5, as shown in FIG. Seal member 7 of flange portion 7B
b is opened from the valve seat 9B of the sheet receiver 9 to be opened. If the connection port 14A of the switching valve 14 and the exhaust port 14C are switched in advance, the interior of the valve box 2A will have a valve hole 9A → a suction / exhaust chamber 10A → a suction / exhaust port. Port 10 → line 13 → connection port 14 for switching valve 14
A large amount of high pressure air in the water pipe 1 and the valve box 2A (a large amount of exhaustion under pressure) is performed through the path of A → exhaust port 14C → second check valve 16, and sewage enters the valve box 2. .

The flow of sewage into the valve box 2A is controlled by
The valve 3 rises due to buoyancy and closes the small air hole 7a of the valve 7 at the upper end of the valve rod 4 to push the valve 7 up. Therefore, as shown in FIG. 3, the valve hole 9A is closed, and the air is closed in the air pool 17 in the valve box 2A.
State. After the valve is closed in this way, when air mixed with the sewage in the water pipe 1 enters the valve box 2A, the pressure of the air pool 17 increases and lowers the sewage level in the valve box 2A. For this purpose, the draft of the float 3 is lowered, and the buoyancy of the float 3 is reduced and lowered by the reduced draft,
As shown in FIG. 2, the valve is in an open state in which the seal member 7b of the flange portion 7B is separated from the valve seat 9B of the sheet receiver 9, and the pressure is exhausted.

When intake pressure is required due to negative pressure inside the water pipe 1 and the valve box 2A, as shown in FIG.
The position is switched to a position where the connection port 14A and the intake port 14B of No. 4 are communicated. As a result, the first check valve 15 → the intake port
Port 14B → connection port 14A → line 13 → intake / exhaust chamber 1
Atmospheric pressure is applied to the valve element 7 through the path of 0A, and the valve element 7 is pushed down. Therefore, the intake air that sucks a large amount of air is provided.

As shown in FIG. 5, a connection port 14A, an intake port 14B, and an exhaust port 14C of the switching valve 14 are provided.
By switching to the position where they are simultaneously connected, it is possible to perform combined intake and exhaust. Further, as shown in FIG.
By switching the connection port 14A, the intake port 14B, and the exhaust port 14C of the switching valve 14 to a position that simultaneously shuts off the communication between the three members, both the intake and exhaust can be stopped.

FIG. 7 is a system diagram showing an embodiment of the second invention. The same or corresponding parts as those of the first invention will be described with the same reference numerals. In this figure, a water pipe 1
Is provided with a suction / exhaust hole 1A, and a connection port 14A of a switching valve 14 is connected to the suction / exhaust hole 1A via a pipeline 13. The switching valve 14 has the same intake port 14 as described above.
B and a rotary switching valve provided with an exhaust port 14C. A first check valve 15 for allowing intake into the water pipe 1 is attached to the intake port 14B, and the first check valve 15 is connected to the exhaust port 14C. A second check valve 16 that allows exhaust from the water pipe 1 is attached.

With such a configuration, the switching valve 14 is switched to the four positions described in the first aspect of the invention, so that only the intake of the water pipe 1 is executed, only the exhaust is executed, and the combined execution of the intake and exhaust is performed. It can also respond to demands such as stopping intake and exhaust. That is, by the structure in which the use of the air valve 2 is omitted,
Intake, exhaust, combined intake and exhaust, and stop of intake and exhaust can be selected and executed.

[0018]

As described above, according to the first aspect of the present invention, by switching the switching valve, the combined suction and exhaust and the stop of the suction and exhaust are performed on the water pipe through the air valve. In addition to the above, it is also possible to select execution of only intake or execution of only exhaust.

According to a second aspect of the present invention, by switching the switching valve, a simple structure without the air valve can be used to cause the water pipe to perform the combined suction and exhaust and stop the suction and exhaust. And execution of only intake or execution of only exhaust can be selected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the first invention.

FIG. 2 is an enlarged sectional view showing an exhaust state.

FIG. 3 is an enlarged cross-sectional view showing a state in which the air valve is closed with water.

FIG. 4 is an enlarged sectional view showing an intake state.

FIG. 5 is an enlarged sectional view showing a combined switching state of intake and exhaust of the switching valve.

FIG. 6 is an enlarged cross-sectional view showing a state in which intake and exhaust of the switching valve are switched to stop.

FIG. 7 is a system diagram showing an embodiment of the second invention.

FIG. 8 is an explanatory view showing a conventional intake / exhaust switching structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Air valve 10 Intake / exhaust port 14 Switching valve 14A Switching valve connection port 14B Switching valve intake port 14C Switching valve exhaust port 15 First check valve 16 Second check valve

Claims (2)

(57) [Claims] An air valve is mounted in communication with a water pipe, and a connection port of a switching valve having an intake port and an exhaust port is connected to an intake / exhaust hole of the air valve. Intake port
A first check valve for permitting intake into the water pipe at the port, and a second check valve for permitting exhaust from the water pipe at the exhaust port. Switching structure. 2. An intake / exhaust port is provided in a water pipe, and a connection port of a switching valve having an intake port and an exhaust port is connected to the intake / exhaust port, and the intake port is connected to the intake / exhaust port. A first check valve for permitting intake into the water pipe, and a second check valve for permitting exhaust from the water pipe attached to the exhaust port. Construction.