JPH05106751A - Air valve with cleaning device - Google Patents

Abstract

(57) [Abstract] [Purpose] Automatically cleans and removes foreign substances adhering to and accumulating on the inner surfaces of the float 3 and the valve box 2 during intake without disassembling the air valve. The detector means 13 detects the intake state of an air valve that communicates the valve box 2 and the exhaust chamber 10 by lowering the valve element 7, and outputs this detection signal to a high-pressure cleaning fluid injection device 15 to cause the flow 3 to flow. The high-pressure cleaning fluid is jetted toward the inner surface of the valve box 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air valve equipped with a cleaning device capable of automatically cleaning the inside of an air valve for venting air from a water pipe such as a sewer pipe.

[0002]

2. Description of the Related Art An air valve is mounted in communication with a water pipe for venting air from a water pipe such as a sewer pipe.
However, inside the valve box of the air valve, sludge-like foreign matter containing oil and fat components enters with the sewage and adheres and accumulates on the inner surface of the float and valve box to prevent proper operation of the air valve, It will cause malfunction. Therefore, conventionally, for example, when an internal inspection is regularly performed at intervals of 2 to 6 months and foreign matter adhering to or accumulated on the inner surface of the float or the valve box is detected, cleaning is performed to remove the foreign matter. Work is done. However, in order to perform the internal inspection and the cleaning work, a troublesome work of disassembling the air valve is required, and the workability is poor.
Moreover, there is a problem that the safety is low because a harmful gas may be sucked in or a harmful liquid may be attached during the disassembling work.

[0003]

The problems to be solved are that the cleaning work requires a troublesome work of disassembling the air valve, which is inferior in workability, and sucks harmful gas during the disassembling work. This is a point of low safety because harmful liquid may adhere.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a valve body pushed up by a float rising in a valve box cuts off communication between the valve box and an exhaust chamber formed above the valve box. In an air valve that connects the valve box and the exhaust chamber with a valve element that descends together with the float, a detection unit that detects a communication state between the valve box and the exhaust chamber, and the detection when the air valve inhales A high-pressure cleaning fluid injection device for injecting a high-pressure cleaning fluid toward the inner surface of the float and the valve box based on a communication state detection signal between the valve box and the exhaust chamber output from the means is provided. Is characterized by automatically cleaning
By eliminating the troublesome work of disassembling the air valve, we have achieved the objective of improving safety by preventing various harmful effects caused by harmful gases and harmful liquids.

[0005]

According to the present invention, as the sewage flows into the valve box, buoyancy is generated in the float and the float rises. Since the valve body also rises due to the rise of the float, the communication between the valve box and the exhaust chamber is cut off, and the filled state in which the air is trapped in the valve box is closed. When the inside of the valve box becomes a negative pressure due to the drainage of the water pipe, the atmospheric pressure is applied to the valve body, and the valve body is pushed down to inhale a large amount of air. The communication state between the valve box and the exhaust chamber in this case is detected by the detection means. As a result, the detection means outputs a communication state detection signal between the valve box and the exhaust chamber to the high pressure cleaning fluid water injection device, and the high pressure cleaning fluid water injection device outputs high pressure cleaning fluid toward the inner surface of the float and the valve box. It is jetted for a predetermined period of time to remove foreign matters adhering to and depositing on the inner surface of the float and the valve box, and let it flow down to the water pipe.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of the present invention. In this figure, an air valve is a valve box 2 that is mounted in communication with a water pipe 1, and a flow valve that is housed inside the valve box 2.
3 and a valve rod 4 attached to the float 3 and extending upward.
Is connected to the valve rod 4 via a pin 5 and has a relative movement amount substantially corresponding to the length of the elongated hole 6 in the vertical direction,
A valve body 7 connected to the upper side of the valve rod 4 is provided. The valve body 7 is a hollow shaft portion 7A having a small air hole 7a at the lower end.
And a flange 7B extending outward in the radial direction at the lower end of the hollow shaft portion 7A, the flange portion 7B being located in a valve box cover 8 detachably attached to the upper portion of the valve box 2. ing. A seat receiver 9 is attached to an upper portion of the valve-box cover 8, and a downward seat 9B around a valve hole 9A formed in the seat receiver 9 is attached to an upper surface of a flange portion 7B of the valve body 7. The attached annular seal members 7b face each other. An exhaust chamber 10 communicating with the atmosphere via an exhaust port 10a is formed in the sheet receiver 9, and a diaphragm device 11 is attached to the upper portion thereof. Further, the hollow shaft portion 7A is slidably inserted from the valve hole 9A through the exhaust chamber 10 of the seat receiver 9 into the diaphragm device 11,
A diaphragm 11A is attached to the upper end portion thereof, and is constantly urged in a valve closing direction (upward direction) by a spring 12, and the upper pressure chamber 11B communicates with the atmosphere via an air nozzle 11b. A detection means 13 is attached which penetrates the ceiling of the diaphragm device 11 and which corresponds to the valve element 7 and which detects the communication state between the valve box 2 and the exhaust chamber 10 formed by a limit switch, that is, the valve opening state of the valve element 7. Has been.
A communication state detection signal detected by the detection means 13 between the valve box 2 and the exhaust chamber 10 is output to the controller 14, and the controller 14 outputs the high pressure cleaning fluid injection device 1 based on the detection signal.
5, a high-pressure cleaning fluid jetting signal is output, and a high-pressure washing fluid (high-pressure water) is predetermined from the nozzles 15A, 15A connected to the high-pressure washing fluid jetting device 15 toward the inner surface of the float 3 and the valve box 2. It is designed to jet for hours. In the figure, 16 is a strainer and 17 is an upper air pool in the valve box 2.

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 7, and the seal member 7b of the flange portion 7B moves to the valve seat of the seat receiver 9. 9B is closed, that is, the valve box 2 and the exhaust chamber 10 are disconnected from each other. Therefore, the air in the water pipe 1 enters the upper pressure chamber 11B of the diaphragm device 11 from the valve box 2 through the small air hole 7a of the valve body 7 as shown by the arrow, and from there, the air nozzle 1
Exhaust (initial exhaust) is performed through 1b. In this case, the upper end of the valve body 7 is in contact with the detection means 13.

By filling the water pipe 1 with water, the water pipe 1
When the air pressure in the valve box 2 becomes high, the pressure chamber 11B also becomes high in pressure, and the diaphragm 11A is pressed down against the spring force of the spring 12, and the valve body 7 is also pressed down via the pin 5, so that as shown in FIG. Seal member 7 of flange portion 7B
b is separated from the seat 9B of the seat receiver 9 to open the valve. As a result, inside the valve box 2, the valve hole 9A, the exhaust chamber 1
0, since it communicates with the atmosphere through the path of the exhaust port 10a, a large amount of high pressure air in the water pipe 1 and the valve box 2 is exhausted (a large amount under pressure) as shown by the arrow, and the sewage is discharged into the valve box. Enter 2. In this case, the upper end portion of the valve element 7 is separated from the detecting means 13. That is, the detection means 13 detects the communication state between the valve box 2 and the exhaust chamber 10. However,
Since it is not always necessary to inject the high-pressure cleaning fluid during this large-volume exhaust, the high-pressure cleaning fluid injection device 1 from the controller 14 is not necessarily required.
It may be controlled in advance so that the output of the high-pressure cleaning fluid injection signal to 5 is cut off.

When the sewage enters the valve box 2, buoyancy is generated in the float 3 and the float 3 rises, closing the small air hole 7a of the valve body 7 at the upper end of the valve rod 4 and pushing up the valve body 7. Therefore, as shown in FIG. 3, the valve hole 9A is closed, and a closed valve (filling water closed) state in which air is trapped in the air reservoir 17 in the valve box 2 is obtained. The upper end of the valve body 7 contacts the detection means 13. After the valve is closed in this way, when the air mixed in the sewage in the water pipe 1 enters the valve box 2, the pressure of the air reservoir 17 increases, and the sewage surface in the valve box 2 is lowered. Therefore, the draft of the float 3 is lowered, and the buoyancy of the float 3 is reduced by the amount of the draft reduction to lower the draft, and the seal member 7b of the flange portion 7B is seated as shown in FIG. Valve seat 9B
The valve is opened and the pressure is exhausted.
Since it is not always necessary to inject the high-pressure cleaning fluid even during this pressure exhaust, the high-pressure cleaning fluid injection device 1 from the controller 14
It may be controlled in advance so that the output of the high-pressure cleaning fluid injection signal to 5 is cut off.

When the inside of the valve box 2 becomes a negative pressure due to the drainage work of the water pipe 1, the atmospheric pressure is applied to the valve body 7 through the path of the exhaust port 10a, the exhaust chamber 10 and the valve hole 9A, and the valve body is loaded. 7 is pushed down, and thus, as shown by the arrow in FIG. 4, a large amount of air is sucked in by suction. In this case, the valve body 7
The upper end of the is separated from the detection means 13. That is, the detection means 13 detects the communication state between the valve box 2 and the exhaust chamber 10. As a result, the detection means 13 outputs a communication state detection signal between the valve box 2 and the exhaust chamber 10 to the high-pressure cleaning fluid water injection device 15, and the nozzle 1 of the high-pressure cleaning fluid water injection device 15 is output.
The high-pressure cleaning fluid is jetted from 5A and 15A toward the inner surface of the float 3 and the valve box 2 for a predetermined time to remove foreign substances adhering to and accumulated on the inner surfaces of the float 3 and the valve box 2. Water pipe 1
Let it flow down. After that, the nozzles 15A and 15A of the high-pressure cleaning fluid water injection device 15 are connected to the float 3 for each intake cycle.
The high-pressure cleaning fluid is jetted toward the inner surface of the valve box 2 for a predetermined time to remove foreign substances adhering to and accumulated on the float 3 and the inner surface of the valve box 2 and then flow down to the water pipe 1.

As described above, according to the present invention, it is possible to automatically remove the foreign matter adhering to and depositing on the inner surfaces of the float 3 and the valve box 2 without disassembling the air valve, so that workability is improved. Is improved. Moreover, there is no possibility of inhaling harmful gas or attaching harmful liquid. Therefore, safety is improved.

[0012]

As described above, according to the present invention, foreign matters adhering to and accumulating on the inner surface of the float and the valve box can be automatically removed without disassembling the air valve, so that workability is improved. Is improved. Moreover, there is no possibility of inhaling harmful gas or attaching harmful liquid. Therefore, safety is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a large amount exhausted under pressure and an exhausted state under pressure.

FIG. 3 is an enlarged cross-sectional view showing a water filling closed state.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Valve box 3 Float 4 Valve rod 7 Valve body 10 Exhaust chamber 13 Detection means 7 Electric storage device 13 Detection means 15 High pressure washing fluid injection device

Claims (1)

[Claims] 1. A valve box is attached in communication with a water pipe, a float is arranged in the valve box, a valve body is connected to the float, and a float rising in the valve box. -The valve body pushed up by the valve cuts off the communication between the valve box and the exhaust chamber formed on the upper side of the valve box, and the valve body descending together with the float connects the valve box and the exhaust chamber. In the air valve, the detection means for detecting the communication state between the valve box and the exhaust chamber, based on the communication state detection signal between the valve box and the exhaust chamber output from the detection means at the time of intake of the air valve An air valve with a cleaning device, comprising a high-pressure cleaning fluid injection device for injecting a high-pressure cleaning fluid toward the inner surface of the float and the valve box.