JPS599167Y2 - water pressure response device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hydraulic response device in a hydraulic response gas flasher such as an instantaneous gas water heater.

The presence of residual water in the diaphragm chamber of water pressure response devices commonly used in instantaneous gas water heaters, etc. after the water has been shut off causes corrosion, and if this water freezes, especially in the winter, it can seriously cause equipment damage or malfunction. It is dangerous and lacks durability.

Therefore, a method is generally used to drain the residual water in the diaphragm chamber after the water has stopped, but since the diaphragm chamber is divided into a low pressure chamber and a high pressure chamber with the diaphragm as a boundary, it is necessary to drain water from both the low pressure chamber and the high pressure chamber. There is a need to.

Conventionally, water draining methods have been provided, such as installing drain plugs in both the low-pressure chamber and the high-pressure chamber, or installing a drain passage that communicates with the compartment in the diaphragm chamber housing, but these methods are complex in structure and impractical. It was lacking in

This device forms a communication path between the low pressure chamber and the high pressure chamber through a drain valve body associated with a diaphragm, and this communication path is closed with a seal valve when water is flowing out or opened when water is stopped, and the water in the compartment is closed. The structure allows drainage to be carried out simply by opening the water drain valve installed on the low pressure side. Especially when the diaphragm is used vertically or inclined, most of the residual water in the diaphragm chamber can be drained out. It is considered a benefit when using.

One embodiment will be described below with reference to the drawings.

In the drawing, 1 is a diaphragm.It is vertically stretched inside the diaphragm chamber and the diaphragm chamber is divided into low pressure chamber A and high pressure chamber B.
It is divided into

2 is a drainage hole 3 that communicates with the low pressure chamber A and the high pressure chamber B.
The drain valve body is provided with a protruding flange 4 located on the low pressure chamber A side of the water drain valve body 2, which is provided through the center of the diaphragm 1 so as to be able to freely slide in the horizontal direction. A seal valve (■) is formed with the diaphragm restraining plate 5, and the water drain hole 3 can be opened and closed by the flange 4 and the diaphragm restraining plate 5 coming into contact with each other.
A spring 6 is interposed between the inner surface of the side wall and the diaphragm holding plate 5, and when the diaphragm mechanism becomes stationary by stopping the water supply, the elastic force of the spring 6 moves the diaphragm 1 and seals the diaphragm 1. The valve V is opened to communicate the low pressure chamber A and the high pressure chamber B.

In addition, a water drain valve 7 is provided at the lowest part of the low pressure chamber A, and by opening the water drain valve 7 after the water has been shut off, all of the water remaining in the low pressure chamber A and approximately half of the water remaining in the high pressure chamber B can be removed. It is now possible to remove the .

In the above embodiment, the spring 6 is interposed between the inner surface of the side wall of the low pressure chamber A and the diaphragm restraining plate 5, but the water drain valve 2
Even if it is interposed between the flange 4 and the diaphragm holding plate 5, the same effect can be obtained.

In addition, the drain valve body 2 is inserted through the diaphragm 1 with a certain drain gap a in the radial direction, and this drain gap a is also opened and closed by a seal valve . In addition to draining water from inside, if the opening area of the drain gap a is increased, water can also be drained from this gap alone.

Furthermore, due to the passage resistance of the drain hole 3 or the drain gap a of the drain valve body 2, or both the drain hole 3 and the drain gap a (hereinafter referred to as the drain hole 3, etc.), By reducing the passage resistance of the communication path 10 from the provided venturi portion 9 to the low pressure chamber A, the closing operation of the seal valve (2) can be performed accurately during the water supply operation.

In the figure, 11 is a water governor valve installed on the inlet side of the water supply channel 8. In the embodiment, the water governor valve 11 is placed in contact with the drain valve body 2 on the same axis and moves forward and backward in conjunction with it. That's what I do.

Reference numeral 12 indicates a return spring, and reference numeral 13 indicates a rod that operates a gas valve (not shown), which is disposed on the same axis as the drain valve body 2, and opens and closes the gas valve by transmitting the movement of the diaphragm 1 as it is to the gas valve. It is something.

Since this device is constructed as described above, when the water supply valve (not shown) is opened from the non-operating state, the water supply channel 8 is opened.
A water flow is generated in the direction of arrow b, but since the passage resistance of the communication passage 10 is smaller than the passage resistance of the water drainage passage 3, etc., the water flow in the direction of arrow b is generated.
A pressure difference is generated in the high pressure chamber B, and the diaphragm 1 moves toward the low pressure chamber (to the left in the figure) against the spring 6, and the protruding flange 4 of the drain valve body 2 collides with the diaphragm restraining plate 5, resulting in a drain passage. The hole 3 and the like are closed to block the low pressure chamber A and the high pressure chamber B.

Therefore, from now on, the gas flashing operation will be performed in response to normal water pressure.

Next, when the water supply valve is closed and the water supply is stopped, the low pressure chamber A
The pressure difference between the gas valve and the high pressure chamber B disappears, and the diaphragm 1 moves toward the high pressure chamber (to the right in the figure), and the rod 13 operates the gas valve.
At the same time, close the gas valve through the water drain valve body 2 and water governor valve 1.
1 moves together and stops at the original position.

However, only the diaphragm 1 moves further due to the elastic force of the spring 6 and opens the seal valve ■.

Therefore, when the drain valve 7 is opened, all of the remaining water in the low pressure chamber A and approximately half of the remaining water in the high pressure chamber B can be discharged to the outside of the vessel through the drain hole 3, etc. .

As explained above, this idea allows water to drain from a diaphragm device that uses a diaphragm vertically or tilted, by simply opening and closing the drain valve installed on the low pressure side, and most of the residual water in the diaphragm chamber can be drained out. Since the amount of water remaining in the body is small, the number of corroded parts is reduced, and even if the residual water freezes, it does not lead to damage or malfunction of the device, and there is no effect on subsequent reuse.

Therefore, even if the diaphragm, which has conventionally been used most often, is in a vertical position, its water removal effect is practically sufficient and its structure can be simplified.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an embodiment of this invention. 1...Diaphragm, 2...Drain valve body, 3...Drain hole, 4...Protruding flange, 5...Diaphragm Holding board, ■...
... Seal valve, 6 ... Spring, 7 ... Ice removal plug, A ... Low pressure chamber of diaphragm chamber, B ...
...Same hyperbaric chamber.

Claims (1)

[Scope of utility model registration request] In a water pressure response device such as an instantaneous water heater in which a diaphragm is arranged vertically or inclined, a diaphragm holding plate and a protruding flange portion on the low pressure chamber side of a drain valve body slidably inserted through the diaphragm are provided. The seal valve constructed by the diaphragm opens and closes the drainage passage that communicates the low pressure chamber and the high pressure chamber, and also applies a biasing force to the diaphragm so as to keep the seal valve open when water is cut off. A water pressure response device characterized by a water drain plug provided on the low pressure chamber side.