JPS60129485A - Automatic water supply valve - Google Patents

Abstract

PURPOSE:To prevent frequent opening/closing of main valve due to slight droppage of water level, by interlocking the pilot valve for opening/closing the pilot valve hole of an automatic water supply valve with a float responsive to the variation of water level. CONSTITUTION:A pressure operating body 5 movable up and down through differential pressure functioning onto the upper and lower faces is provided in a water supply valve body 1, where a chamber 7 on the back of operating body 5 is communicated through a control hole of specific diameter to the interior of the body 1. While main valve 9 for opening/closing a delivery port 3 is provided on the lower face of said body 5 to penetrate a pilot valve hole 10 for communicating the back pressure chamber 7 through the delivery port 3 to the outside of said body 1. The diameter of pilot valve hole 10 is made larger than that of control hole 8 and the pilot valve 12 for opening/closing the pilot valve hole 10 is communicated to a float 14 responsive to the variation of water level.

Description

Detailed Description of the Invention The present invention relates to an automatic water supply valve that controls the opening and closing of a water spout using a float that responds to changes in water level, in which the float remains submerged in water when the valve is closed. It is related to.

Conventionally, in order to maintain the water level at a predetermined level in various water receiving tanks, water supply has been controlled using ball tap valves or constant water level valves, but pole tap valves simply use the buoyant force of a float that responds to changes in water level as the valve-closing force. Since the water level is only small, the water level difference between the water level when the valve opens and the water level when the valve closes is small, and the float swings in conjunction with even the slightest change in water level, making the spout useless. This causes the inconvenience of repeated opening and closing, resulting in the occurrence of water hammer, and as the degree of opening decreases as the valve closes, the amount of water discharged also decreases, resulting in a small amount of water being discharged for a long time just before the valve closes. This can cause problems with insensitive water volume that escapes detection by water meters, and the float is linked to abnormal vertical displacement of the water tank water level that occurs when an earthquake occurs, and the water discharge valve opens and closes accordingly, causing inadvertent overflow leakage. However, it was believed that abnormal consumption of water over a wide area would cause various inconveniences to the regional water supply.

On the other hand, constant water level valves supply water by displacing the main valve that opens and closes the water outlet and the diaphragm or piston that operates in conjunction with the action of a pilot valve such as a small ball tap valve or solenoid valve that is installed separately from the main body. However, if the pilot valve is a ball tap valve, as mentioned above, the ball tap valve is linked to minute changes in the water level, so the main valve is repeatedly opened and closed for a short period of time, resulting in water surface waves and water hammer. It has the same drawbacks as general ball tap valves in terms of power generation, etc., and if the pilot valve is a solenoid valve, these problems can be resolved for the time being, but the mounting equipment cost is high, and it does not function properly in the event of a power outage. It had drawbacks such as being unable to do so.

In view of these drawbacks, the present invention provides a pressure actuating body which is operated by a one-step downward displacement due to the pressure difference acting on the upper and lower surfaces inside the main body, and a back pressure chamber is divided and formed on the back side of the pressure actuating body. is connected to the inside of the main body through a control hole with a predetermined diameter,
A main valve for opening and closing the water spout is mounted on the lower surface of the pressure operating body, and a pilot valve hole for communicating the back pressure chamber with the outside of the main body through the water spout is installed, and the pilot valve hole has a diameter larger than that of the control hole. In addition, an automatic water supply valve is provided in which the pilot valve that opens and closes the pilot valve hole is linked to a float that responds to changes in water level, thereby solving the above-mentioned drawbacks. To explain an example based on the drawings, 1 is a main body of an automatic water supply valve, which has a flow port 2 formed at the - side end, a water spout 3 formed at the bottom of the other side, and the periphery of the water spout 3 internally. The valve seat 4 is formed by rising upward toward the valve seat 4.

Reference numeral 5 denotes a pressure-actuating body constituted by a diaphragm that is displaced vertically due to a pressure difference acting on the upper and lower surfaces, and is mounted between the upper inner wall 6 of the main body 1 so as to be positioned above the water spout 3 and facing each other. A back pressure chamber 7 is divided above the pressure working body 5, and the back pressure chamber 7 is communicated with the inlet 2 inside the main body 1 through a control hole 8 set to a predetermined hole diameter d2. There is.

Further, a main valve 9 which is attached to and separated from the valve seat 4 to open and close the water spout 3 is integrally mounted on the lower surface of the pressure actuating body 5, so that the main valve 9 is opened and closed in conjunction with the vertical movement of the pressure actuating body 5. accomplished,
In addition, a back pressure chamber 7 is connected to the center of the pressure working body 5 through the water spout 3.
The pilot valve hole 10, which communicates with the outside of the main body 1, is fitted with a valve seat tube 11 through which the pilot valve hole 1O is set to have a predetermined hole diameter d1,
The diameter is set to be smaller than the hole diameter d2 of the ll hole 8.

12 is a pilot valve that attaches to and leaves the pilot valve hole 10 to open and close the pilot valve hole 10, and the pilot valve 12 has a guide portion 1 hanging from around the valve seat tube 11.
3, the upper part of which is slidably guided vertically, and the lower end of the lever 16 is pivotally supported on a support 15 having a float 14 attached to one end and whose base end protrudes from the bottom wall of the main body 1.
The pilot valve 12 is pivotally mounted at a midway position, and the pilot valve 12 is opened and closed in conjunction with the vertical movement of the flow eye 4 in response to changes in the water level.

In the figure, 17 is a strainer 218 interposed between the inlet 2 and the water outlet 3, and the strainer 218 is installed horizontally through the valve PIU cylinder 11. For example, as shown in FIG. 4, it may be a piston type or a direct acting type.

Although not shown in the drawings, the control hole 8 is equipped with an adjustment needle valve whose opening area is variable to change the difference in valve closing time.
It is possible to do ε.

Next, the operation of the automatic water supply valve according to the present invention will be explained: □Figure 1 shows a state in which the main valve "q7!l< valve opening is displaced at the lower limit water level, and water supply is started through the water spout 3. In the state, 1ν control hole 8 and pilot valve hole 10
Because the pressure inside the back pressure chamber 7 is lower than the pressure at the two inlets due to the hole diameter relationship between the The valve 94 is maintained in the open state.

When the water level rises due to continued water supply, flow 1-1
4 rises, the pilot valve 12 is interlocked, and when the pilot valve hole 1O is blocked as shown in FIG. As the pressure in the chamber 7 rises too much, the pressure actuating body 5 gradually begins to move downward, and during this time, the water level further increases and the pressure actuating body 5 lowers to close the pilot valve via the valve seat tube 11. 12 is pressed and moves downward, and further, the downward movement of the pilot valve 12 causes the flow i to 1 to flow through the lever 16.
4 is also forcibly moved downward, so the float 14 resists the buoyancy and begins to submerge in the water, and finally, as shown in FIG. 3, the main valve 9 closes the spout 3 and the The water level becomes icy, and the water level at this point becomes the upper limit water level, and an operating water level difference H is ensured between it and the lower limit water level, while the float 14 is maintained in a completely submerged state.

Also, when the water level decreases due to the use of stored water and reaches the lower limit water level,
In conjunction with the lowering movement of the float 14, the pi-nisso 1-valve 12
opens the pilot valve hole 1O, the pressure in the back pressure chamber 7 decreases, the pressure operating body 5 is displaced upward, and the state shown in FIG. 1 is reached, and water supply is restarted.

In short, in the present invention, a pressure actuating body 5 is disposed inside the main body 1, and the pressure actuating body 5 is vertically displaced by a pressure difference acting on the upper and lower surfaces. It communicates with the inside of the main body 1 through a control hole 8 of a predetermined diameter, and a main valve 9 for opening and closing the water spout 3 is attached to the lower surface of the pressure operating body 5, and the back pressure chamber 7 is connected to the outside of the main body 1 through the water spout 3. A pilot valve hole 1O is provided through the pilot valve hole 10 to communicate with the control hole 8, and the pilot valve hole 10 has a diameter larger than that of the control hole 8.
2 is linked to the float 14 that responds to changes in water level, so when the main valve 9 is closed and the water is stopped, the biloft valve 2 also moves downward in conjunction with the lowering of the pressure actuating body 5, and accordingly the float Since flow 14 is forcibly pressed down and remains submerged in the water, flows 1 and 14 are not affected by water surface waves at all.
The biggest drawback of the ball tamp valve, which is that the main valve 9 is repeatedly opened and closed due to the vertical movement of the main valve 9, can be completely eliminated. In addition, it is possible to provide a certain operating water level difference 11 between the water level when the valve is closed and the water level when the valve is opened. It is possible to completely prevent the harmful effects caused by frequent opening and closing operations, and the operating mechanism is also very simple, making it extremely effective in practical use.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and FIG. 1 is a cross-sectional view of an automatic water supply valve according to the present invention, FIGS. FIG. 7 is a sectional view showing another embodiment. ,"゛1 Main body 3 Water storage port 5 Pressure operating body
7 Back pressure chamber 8 Control hole 9 Main valve 1o Pilot valve hole 12
Pilot valve 14 Float @ 3 internal procedure amendment January 23, 1980 Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1. Indication of the case 1989 Patent Application No. 238489 2. Name of the invention Automatic water supply valve 3. Amendment Applicant address 3-76 Kasatori-cho, Nishi-ku, Nagoya Name Kane Kogyo Co., Ltd. 4 Agent address 2-46 Nishizaka-cho, Chikusa-ku, Nagoya 6 Number of inventions increased by amendment 7 Subject: Written amendment to the specification, Patent Application No. 238489, filed in 1982, regarding the above application, the term "small diameter" is amended to read "large diameter" on page 5, line 10 of the middle box of the specification. Applicant Kane Kogyo Co., Ltd.

Claims (1)

[Claims] Inside the main body, there is a pressure-actuating body which is displaced downward by the pressure difference acting on the bottom surface.The back-pressure chamber divided into sections on the back side of the pressure-actuating body has a control hole of a predetermined diameter. A main valve for opening and closing the water spout is mounted on the lower surface of the pressure operating body, and a pilot valve hole for communicating the back pressure chamber with the outside of the main body through the water spout is provided through the pilot valve hole. An automatic water supply valve characterized in that the diameter is larger than that of the control hole, and the pilot valve that opens and closes the pilot valve hole is linked to a float that responds to changes in water level.