JPH0356367B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a system for opening and closing valves provided in passageways for fluids such as gas and water supplied to water heaters, stoves, ovens, etc. using an operating member. The present invention relates to a fluid control device for controlling a fluid.

(Prior Art) Conventional devices of this type generally open the on-off valve by transmitting manual operating force directly to the on-off valve.

(Problems to be Solved by the Invention) Therefore, in the above-mentioned conventional device, a relatively large manual operating force is required to resist the spring that keeps the on-off valve open, and the operating force is If the pressure is weakened to a soft touch, the airtightness and watertightness of the fluid will not be maintained.

(Means for Solving the Problems) In order to solve the above-mentioned conventional inconveniences, the present invention provides a device that uses a special boosting mechanism to open the on-off valve with a relatively small manual operating force. In this invention, an on-off valve provided in a fluid passage is opened by an operating member, and the operating member is a pressure chamber connected to a branch path branching from the passage. , consisting of a fluid pressure responsive member provided in the pressure chamber and a pilot valve that opens and closes the inlet of the fluid in the pressure chamber, and when the pilot valve is opened, the fluid pressure responsive member is displaced. The present invention is characterized in that the on-off valve is opened.

(Function) According to the above configuration, when the pilot valve is opened with a relatively small manual operating force, fluid flows into the pressure chamber, and the fluid acts on the fluid pressure responsive member.
The fluid pressure responsive member is displaced, and a relatively large operating force accompanying this displacement opens an on-off valve interposed in the fluid passage.

(Example) Next, the present invention will be explained based on the illustrated example.

FIG. 1 shows the external appearance of a water heater. Inside the water heater body 1, as shown in the second diagram, a heat exchanger 2 and a burner 3 for heating the heat exchanger 2 are provided. As members, a gas control unit 6 incorporating a gas valve 5 as an on-off valve interposed in a gas passage 4 to the burner 3 as a fluid passage, and a water supply pipe 7 connected to the upstream side of the heat exchanger 2. A water valve 8 serving as an intervening on-off valve is provided, and a hot water outlet 10 is provided outside the water heater body 1 at the tip of a hot water tap 9 continuous to the downstream side of the heat exchanger 2.

The gas control unit 6 includes, in the gas passage 4, the gas valve 5 and an electromagnetic safety valve 12 disposed upstream thereof and held open by a predetermined electromotive force from a thermocouple 11 for combustion detection. However, a pilot gas passage 14 is formed by branching from the downstream side of the gas valve 5 to a pilot burner 13 arranged in parallel on the side of the burner 3.

The water valve 8 is constituted by a spool-type valve, and when water is passed to the heat exchanger 2 by opening the water valve 8, a water flow detector 15 such as a hydraulic responsive member or a flow switch detects the gas valve. An automatic valve 16 provided on the downstream side of the valve 5 is opened.

17 is a valve-open holding member, and the valve-open holding member 17
The push rod 19 moves from the starting position A to the final position B due to an external pressing force that resists the return spring 18.
and a pusher mechanism 20 assembled to the push rod 19, and the push rod 19 is prevented from returning from the terminal position B by the push rod 19 at the intermediate position C, and cannot be pushed again from the outside. It was designed so that it could be returned to the starting end position A by pressure.

The gas valve 5, the water valve 8, and the electromagnetic safety valve 12 are connected to an operating member 26 (described later) via the valve opening holding member 17.
The water valve 8 is opened and closed by the water valve 8.
The operating rod 21 is connected, the second operating rod 23 is opposed to the front end of the valve rod 22 of the gas valve 5, and the first operating rod 2
The first and second actuating rods 23 are integrally formed with the push rod 19, so that when the press rod 19 moves from the starting end position A to the end position B, the second actuating rod 23 first moves to the valve rod 22.
, the gas valve 5 and water valve 8 are opened at the intermediate position C, and then the lever 24 is moved in conjunction with the valve rod 22 by being pushed beyond the intermediate position C toward the terminal position B.
The electromagnetic safety valve 12 is opened by pressure.

Further, when the push rod 19 is moved to the terminal position B, the igniter 25 is activated and the pilot burner 13 is ignited, and when the push rod 19 is returned to the intermediate position C, the water valve 8 is opened. Fluid gas is supplied to the burner 3 through an automatic valve 16 which is opened in advance by water passing through the heat exchanger 2 when the valve is opened, and is ignited by the pilot burner 13, causing the gas to flow out. Hot water was made available from sprue 10.

Here, in the conventional system, the gas valve 5 and the water valve 8, which are the on-off valves, are opened by operating an operator provided on the front surface of the water heater body 1, and transmitting the operating force directly to the on-off valve. However, in the illustrated embodiment, the operating member 26 for opening and closing the gas valve 5 and the water valve 8, which are on-off valves, is used as a water supply passage, which is a fluid passage. A branch passage 27 branched from the upstream side of the water valve 8 of the pipe 7
It consists of a pressure chamber 28 connected to the pressure chamber 28, a diaphragm 29 which is a fluid pressure responsive member provided in the pressure chamber 28, and a pilot valve 31 that opens and closes the fluid inlet 30 of the pressure chamber 28. By displacing the diaphragm 29 with a relatively small manual operating force that is enough to open the valve, the gas valve 5 and the water valve 8, which require a relatively large operating force, can be opened. To explain this in more detail, in the illustrated example, the pressure chamber 28 and the outlet 10 are communicated with each other via the outlet 32 which is smaller in cross-sectional area than the inlet 30, and the diaphragm 29 is connected to the outlet 10 of the pressure chamber 28. The shaft piece 33 that protrudes outward is attached to the push rod 1.
The pilot valve 31 is provided opposite to the front end of the pilot valve 31.
According to the manual valve opening operation, water from the water supply pipe 7 flows into the lower side of the diaphragm 29 of the pressure chamber 28, the water acts on the diaphragm 29, and the diaphragm 29 is displaced upward. The press rod 19 is pressed from the starting end position A to the ending position B by a relatively large operating force from the shaft piece 33 that is displaced together with this. The water that has flowed into the pressure chamber 28 passes through the outlet 32 and is gradually released from the tap 10, and after a certain period of time when the water is released below a predetermined amount, the diaphragm 29 returns to its original position and the shaft piece 33
The pressing operation of the push rod 19 by
3 is held at intermediate position C.

In this way, the gas valve 5 and the water valve 8, which are on-off valves, are opened by the displacement of the diaphragm 29, and kept open by the valve-opening holding member 17. When the pilot valve 31 is then manually opened again, the diaphragm 29 is displaced again, and the push rod 1
9 is pressed from the intermediate position C toward the terminal position B, the locking by the push button mechanism 20 is released, and the valve returns to the starting position A, and the gas valve 5 and water valve 8
is opened, and then the electromagnetic safety valve 12 is opened.

Note that the pilot valve 31 can be opened with a small amount of force, so the pilot valve 31 can be opened as shown in the figure.
1 is opened and closed by the wire 34 connected thereto, the operation location can be freely selected, for example, the operation can be performed on the outlet 10 side, which is more convenient. FIG. 3 shows a modification of FIGS. 1 and 2. In this case, a valve-opening holding member 17 having a structure different from that of the valve-opening holding material shown in FIG. 2 is used to lock the push rod 19. In other words, the gas valve 5 and the water valve 8 are held open, and the locking of the push rod 19 is released by a release member 36 including a fire extinguishing button 35 that is separate from the valve-open holding member 17. This is for releasing the gas valve 5 and the water valve 8 from being kept open, and other than the self-resetting pilot valve 31, the other configurations are not particularly different from those shown in FIGS. 1 and 2.

(Effects of the Invention) According to the present invention, the on-off valve installed in the fluid passage is opened by an operating member that is a booster mechanism that utilizes the fluid used, such as water or gas. Therefore, compared to the conventional method in which manual operating force is directly transmitted to the on-off valve to open the valve, the operation is lighter and the usability is improved.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of implementation when the present invention is applied to a water heater, Fig. 2 is a cutaway front view showing the main parts thereof, and Fig. 3 is a cutaway view showing a modification of Fig. 2. It is a front view. 4... Gas passage (fluid passage), 5... Gas valve (on/off valve), 7... Water supply pipe (fluid passage), 8...
Water valve (on/off valve), 26... Operating member, 27... Branch passage, 28... Pressure chamber, 29... Diaphragm (fluid pressure responsive member), 31... Pilot valve, 34
...Wire.

Claims (1)

[Scope of Claims] 1. In a device in which an on-off valve provided in a fluid passage is opened by an operating member, the operating member is connected to a pressure chamber connected to a branch passage branched from the passage, and a pressure chamber connected to a branch passage branched from the passage, It is composed of a fluid pressure responsive member provided in a chamber and a pilot valve that opens and closes the fluid inlet of the pressure chamber, and when the pilot valve is opened, the fluid pressure responsive member is displaced and the opening/closing valve is opened. A fluid control device characterized in that a valve is opened. 2. The fluid control device according to claim 1, wherein the pilot valve is opened and closed by a wire connected to the pilot valve.