JPS582339B2 - Valve opening device in gas safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention presses and opens a solenoid valve provided in a gas supply path by rotating a rotation operation shaft, and at the same time closes gas passages leading to burners other than the pyrosoto burner. This invention relates to a valve opening device for a gas safety device that prevents a large amount of raw gas from being released from a burner.

Generally, in this type of valve opening device, for example,
As described in Publication No. 06539 (Japanese Utility Model Publication No. 51-48764), the operation shaft rotates together with the shaft when the shaft initially rotates, and automatically stops rotating at a certain rotation angle of the shaft. An automatic return cam that returns to normal position and a fixed cam that rotates with the shaft as the shaft rotates completely are provided.The automatic return cam presses and releases the solenoid valve, and the fixed cam opens and closes the valve provided in the gas passage. ing.

Therefore, when a gas safety device is provided with a plurality of gas passages, for example, a gas passage for a bathtub and a gas passage for a stop-start type water heater, the operating shaft must be connected to the solenoid valve in order to open and close these gas passages. Following the initial rotation operation for releasing the pressure, there are three steps: a second rotation operation for opening the gas passage for the bathtub, and a second rotation operation for opening the gas passage for the water heater. When the solenoid valve is opened, these multiple gas passages are placed in communication with the gas supply passage, so there is a risk that the safety device will be filled with a large amount of raw gas. Exists.

The present invention has been made in order to improve such inconveniences, and the present invention has been made so that a plurality of gas passages can be opened and closed by a two-step rotation operation of an operating shaft, and these gas passages are To provide an opening/closing device which, except for a gas passage, is placed in a closed state with a gas supply path before opening an electromagnetic valve.

To explain this with reference to the illustrated embodiment, the figure shows a bathtub heater for heating a bathtub that incorporates a stop-start type water heater, and the gas passage of the burner for the water heater is closed when a solenoid valve is pressed and released. 1 indicates a safety equipment housing, and this equipment housing 1 has a gas supply path 2.
A solenoid valve 3 that opens and closes, an on-off valve 5 that opens and closes the gas passage 4 of the burner for the water heater, and a gas passage 6 of the burner for the bathtub pot.
A main valve 7 that opens and closes, a pyrosoto valve 9 that opens and closes the gas passage 8 of the pilot burner, and an air barge valve 11 that opens and closes the air discharge path 10 are provided. An operating shaft 12 that rotates in two stages is provided, and the operating shaft 12 includes a first cam 13 that rotates together with the shaft, and a cam that rotates in the diametrical direction of the shaft only during the first rotation of the shaft. Due to the sliding engagement of a pin (not shown) that is loosely fitted, the pin rotates in conjunction with the shaft against a return bar (not shown), and when the rotational force stops, the pin returns to engagement. A second cam 14 is provided which is detached by the elastic force of the bullet and automatically returned by the bullet.

The pilot valve 9 is disposed opposite to the first cam 13, and the first swinging lever 15 is brought into contact with the first cam 13.
The main valve 7 is connected via the second cam 14.
In this case, the air purge valve 11 is used and the second air purge valve 11 is also used.
A swinging lever 16 is brought into contact with the lever 16, and the tip of the lever 16 has a pair of branch pieces 16a and 16b that are branched vertically and left and right, and is sandwiched between the branch pieces 16a and 16b to form a horizontal line perpendicular to the lever 16. An operating rod 17 is swingably supported, and push rods 18 for opening the solenoid valve 2 are provided on both sides of the operating rod 17, respectively.
The push rod 18 and the on-off valve 5 are attached in a vertical relationship so that the solenoid valve is not opened before the on-off valve 5 is closed.
The valve seat of the solenoid valve 3 is located higher than the solenoid valve 3, and the push rod 18 and the valve rod of the on-off valve 5 have their rear ends located in the housing 1.
It is slidably inserted into guide tubes 19, 19 that hang down therein.

In the figure, 20 indicates a piezoelectric igniter, and 21 indicates an operation knob.

Since the present invention is constructed as described above, the knob 21
When the operating shaft 12 is rotated by 90 degrees while holding the
4, the air purge valve 11 is opened, and at the same time, when the second swinging lever 16 that comes into contact with the cam 14 is lowered, the on-off valve 5 first closes the gas passage 4 of the hot water heater burner. The solenoid valve 3 is opened by the push rod 18 in a tsubo relationship, and the pyrosoto burner is ignited by the igniter 20, and the electromotive force of the thermocouple heated by the burner is applied to the solenoid valve 3.
When the rotational force of the operating shaft 2 is stopped while the rotational force of the operating shaft 2 is stopped after excitation and opening of the By opening the gas passage 4 and thus opening the hot water tap, the water heater burner is burned, and when the operating shaft 12 is further rotated, the first swinging lever 15 comes into contact with the first cam 13.
This opens the main valve γ and causes the bathtub burner to burn.

As described above, in the sharpener according to the present invention, the automatic return cam provided on the operating shaft so as to press and release the solenoid valve is provided with a swinging lever that swings in contact with the automatic return cam, and the swinging lever is provided with a swing lever for opening the solenoid valve. The operating rod has a push rod and an on-off valve for opening and closing the gas passages of burners other than the pyronot burner on both sides, and is supported so that the solenoid valve is not opened prior to closing the on-off valve. Not only is it possible to press and release the valve, but also the on-off valve in the gas passage of the burner can be closed before opening the solenoid valve, making it safe and facilitating combustion of the burner in the gas passage connected to the on-off valve. Therefore, the automatic return cam and the fixed cam installed separately on the operating shaft can also operate the open/close valves of the gas passages of other burners, so three rotations can be performed by two rotations of one operating member. This has the effect of making the operation of the valve easier and significantly easier to open the valve.

[Brief explanation of drawings]

The figures show one embodiment of the present invention; FIG. 1 is a front view showing a gas passage in cross section, FIG. 2 is a view taken along the line A-A in FIG. - It is a view taken along the line B. 3...Solenoid valve, 5...Opening/closing valve, 12.
...Operation axis, 14...Cam, 16...
... Swinging lever, 17... Operating rod.

Claims (1)

[Claims] 1 The operating shaft is equipped with a cam that rotates with the shaft when the shaft initially rotates at a certain angle, and automatically returns to its original position when the shaft is relaxed when the rotation stops, and the cam presses and releases the solenoid valve. In the gas safety device, a swinging lever that swings in contact with the cam is provided, and a push rod for opening the solenoid valve and an on-off valve for opening and closing the gas passage of the burner other than the pyro-soto burner are attached to both sides of the swinging lever. 1. A valve opening device for a gas safety device, characterized in that an operating rod is supported to prevent the solenoid valve from opening prior to closing of the on-off valve.