JPH0828748A - Air valve with cleaner - Google Patents

Abstract

PURPOSE:To remove foreign matter such as salt adhering to a part in the vicinity of a valve seat and a ventilating passage before their drying by providing a washing device for ejecting washing water toward the part near the valve seat and the ventilating passage in an air valve having the ventilating passage through which the valve seat communicates with the external part of a valve casing. CONSTITUTION:An air valve comprises a valve casing 2 attached to a water pipe 1 to communicate therewith, a float 3 housed in this valve casing 2, a valve element 5 connected to the upper part of the float 3, a valve seat 8 opened or closed by the valve element 5 and a ventilating passage 10 through which the valve seat 8 communicates with the external part of the valve casing 2. In this case, a washing device 11, is provided, which serves to eject washing water from a high pressure water source 11A to a part in the vicinity of the valve seat 8 and the ventilating passage 10 through a washing water supply pipe 11B when a control valve 11C is opened based on the time setting of a timer. Thus, foreign material such as salt adhering to the part in the vicinity of a suction/exhaust hole 6 in the valve seat 8 and the ventilating passage 10 can be surely removed before their drying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is produced in an air valve for intake / exhaust of a water pipe when foreign matter adheres to the vicinity of a valve seat and a ventilation passage, and the valve body adheres to the dried foreign matter over time. The present invention relates to an air valve with a cleaning device that reliably prevents malfunction.

[0002]

2. Description of the Related Art As shown in FIG. 2, an air valve connected to a water pipe for intake and exhaust of the water pipe is a valve box connected to a connecting port 1A of the water pipe 1 as shown in FIG. 2 and
The valve body is provided with a float 3 housed inside a valve box 2 and a valve body 5 which is capped by the float 3 and moves up and down with a guide member 4 together with the float 3. An upward sheet portion 5A is formed on the outer peripheral portion of the sheet 5. A lid 7 having an intake / exhaust hole 6 is attached to the upper portion of the valve box 2,
A valve seat 8 mounted downward on the outer peripheral portion of the intake / exhaust hole 6 faces the seat portion 5A of the valve body 5. Therefore, in the initial state where the piping of the water pipe 1 is completed, the float 3 and the valve body 5 are held at the valve opening position shown in the figure. Therefore, when the water pipe 1 is filled with water, the air in the water pipe 1 is discharged from the valve box 2
From the notch (not shown) of the guide member 4 and the intake / exhaust hole 6
Through the lid 7 and the cover 9 attached to the upper portion of the lid 7, that is, the air intake / exhaust holes 6, and the ventilation path formed by the space between the lid 7 and the cover 9. It is rapidly exhausted to the outside through 10. On the other hand, as the water flows into the valve box 2 due to the filling of the water pipe 1, the float 3
A buoyancy force is generated on the float 3 and the valve body 5 and the guide member 4
The seat portion 5A of the valve element 5 is configured to come into close contact with the valve seat 8 to close the intake / exhaust hole 6 to stop water.

However, when the fluid passing through the water pipe 1 is seawater, the intake / exhaust holes 6 in the valve seat 8 and the air passage 10 are formed.
There is a risk that foreign matter such as salt adheres to the vicinity of and dry, and the foreign matter such as salt that adheres and dries causes the valve body 5 to stick to the valve seat 8, resulting in malfunction. Therefore, it is necessary to manually remove an extraneous substance during the maintenance which is regularly performed by the operator.

[0004]

The problem to be solved is that when foreign matter such as salt adheres and dries near the valve seat and the air passage to cause a malfunction, the operator manually causes the foreign matter to be removed. This is a point that requires removal work.

[0005]

According to the present invention, there is provided a valve box connected to a water pipe, a float accommodated in the valve box, and a valve connected to an upper portion of the float. An air valve having a body, a valve seat that is opened and closed by the valve body that moves up and down together with the float in the valve box, and an air passage that connects the valve seat and the outside of the valve box, A cleaning device that sprays cleaning water toward the vicinity of the air passage is provided to prevent malfunctions such as salt and other foreign matter from adhering and drying near the valve seat and air passage. However, the purpose of eliminating the work of removing foreign matter by a worker by hand has been achieved.

[0006]

According to the present invention, the cleaning device is periodically operated to inject the cleaning water toward the vicinity of the valve seat and the air passage so that the salt content adhering to the vicinity of the valve seat and the air passage can be reduced. Foreign matter such as can be removed before drying.

[0007]

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. It should be noted that the same or corresponding parts as those of the conventional example of FIG. In FIG. 1, an air valve is a valve box 2 which is attached to communicate with a connecting port 1A of a water pipe 1, a float 3 which is housed inside the valve box 2, and a cover which is fitted to the float 3. And the guide member 4 together with the float 3
Is provided with a valve body 5 that moves up and down as a guide, and an upward sheet portion 5A is formed on the outer peripheral portion of the valve body 5. A lid 7 having an intake / exhaust hole 6 is attached to the upper part of the valve box 2, and a valve seat 8 attached downward to the outer periphery of the intake / exhaust hole 6 has a seat portion 5A of the valve element 5. Is facing. Therefore, in the initial state where the piping of the water pipe 1 is completed, the float 3 and the valve body 5 are held at the valve opening position shown in the figure. Therefore, when the water pipe 1 is filled with water, the air in the water pipe 1 is
A space between the valve body 2 and a cover member 9 attached to the upper portion of the lid body 7, that is, an intake / exhaust hole, passing through a notch (not shown) in the guide member 4 and the intake / exhaust hole 6. 6, a ventilation passage 10 formed by the space between the lid 7 and the cover 9.
It is rapidly exhausted to the outside through the. On the other hand, as water flows into the valve box 2 due to the water filling of the water pipe 1, buoyancy is generated in the float 3, and the float 3 and the valve body 5 guide the guide member 4. The seat portion 5A of the valve body 5 floats up and comes into close contact with the valve seat 8 to close the intake / exhaust holes 6 to stop the water.

On the other hand, a cleaning device 11 is attached through the central portion of the cover 9. The cleaning device 11 is for injecting cleaning water (clean water such as tap water) toward the vicinity of the intake / exhaust holes 6 in the valve seat 8 and the air passage 10.
It is provided with a high-pressure water source 11A, a wash water supply pipe 11B connected to the high-pressure water source 11A, and a control valve 11C such as an electromagnetic valve or a ball valve provided in the wash water supply pipe 11B. The tip nozzle portion of the wash water supply pipe 11B is
The cover 9 is attached downward through the central portion of the cover 9 and has a directivity that allows washing water to be sprayed toward the vicinity of the intake / exhaust holes 6 in the valve seat 8 and the air passage 10. Further, the control valve 11C is configured to automatically open and close in a predetermined cycle by setting the time of a timer (not shown).

With such a configuration, when the control valve 11C of the cleaning device 11 is opened based on the time setting of the timer, the cleaning water flows from the high pressure water source 11A through the cleaning water supply pipe 11B to the valve seat 8 and the ventilation. It is injected toward the vicinity of the road 10. As a result, foreign matters such as salt adhering near the intake / exhaust holes 6 in the valve seat 8 and the air passage 10 can be reliably removed before drying. For this reason, it is possible to reliably prevent foreign matter such as salt from adhering and drying near the valve seat 8 and the intake / exhaust hole 6 to cause malfunction, and to remove the foreign matter by the manual work of the operator, which is conventionally done. Work can be eliminated.

In the above embodiment, the control valve 11C is described as a solenoid valve or a ball valve that automatically opens and closes based on the time setting of the timer, but the present invention is limited to the above embodiment. Alternatively, the control valve 11C may be a manual on-off valve.

[0011]

As described above, according to the present invention, the cleaning device is periodically operated to inject the cleaning water toward the vicinity of the valve seat and the air passage, thereby the vicinity of the valve seat and the air passage. Since foreign matter such as salt adhering to the can be removed before drying, it is possible to reliably prevent foreign matter such as salt from adhering and drying near the valve seat and the air passage to cause malfunction. It is possible to eliminate the conventional work of removing foreign matter by a worker's manual work.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

 1 Water pipe 2 Valve box 3 Float 5 Valve body 8 Valve seat 10 Ventilation path 11 Cleaning device

Claims (1)

[Claims] 1. A valve box mounted in communication with a water pipe,
A float accommodated in the valve box, a valve element coupled to the upper part of the float, a valve seat opened and closed by the valve element that moves up and down together with the float in the valve box, In an air valve having a ventilation passage that communicates the valve seat with the outside of the valve box, a cleaning device is provided which injects cleaning water toward the vicinity of the valve seat and the ventilation passage. With air valve.