JPS625544Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas control valve device mainly used in a gas water heater.

Conventionally, in this type of water heater, the gas supply to the burner is generally controlled by intervening a governor valve for pressure regulation in the gas flow path and a water pressure responsive valve that opens when water flows; in this case, each valve is operated separately. Generally, the governor valve is housed in a valve housing, but in order to improve the pressure regulating characteristics of the governor valve, a diaphragm connecting the valve and a gas chamber in the valve housing for applying gas pressure to the diaphragm are required. As a result, the valve housing of the governor valve becomes large, and in order to accommodate the valve housing together with the valve housing of the water pressure-responsive valve in the water heater body, the body must also be large. This brings with it the inconvenience of having to make it larger.

The purpose of the present invention is to provide a device that eliminates such inconveniences, and includes a diaphragm 4 on one side and a diaphragm 4 facing the diaphragm 4 in a gas chamber 3 in a valve housing 2 interposed in a gas flow path 1. In the gas chamber 3, the diaphragm 4 and the valve are provided with a valve hole 5 on the other side, and a governor valve 7 connected to the diaphragm 4 via a connecting rod 6 is exposed to the valve hole 5. A second valve hole 8 is provided on the circumferential side of the intermediate portion between the hole 5 and a hydraulically responsive valve 9 facing the second valve hole 8. A connecting rod 11 is inserted into the connecting rod 6 to intersect with the connecting rod 6 three-dimensionally, and is connected to the response valve 9.

In the one shown, the valve housing 2 has a diaphragm 4 on the bottom surface.
and a valve hole 5 for the governor valve 7 on the top surface.
and a gas chamber 3 in between, to which a cap 12 on the lower surface that presses the diaphragm 4 and a cap 14 on the upper surface that forms the gas outlet 13 are attached and detached, A second valve hole 8 for the hydraulically responsive valve 9 and a gas inlet 15 on the outside thereof are provided on one side of the side surface, and the responsive valve 9 and an external hydraulically responsive device 10 are connected on the other side of the circumferential side. A relatively large-diameter insertion hole 16 is formed into which the continuous rod 11 is inserted, and after the continuous rod 11 is inserted into the insertion hole 16, a guide sleeve 17 provided in the insertion hole 16 is used to attach the continuous rod 11 to the shaft. The center position was determined so that the connecting rod 11 was kept in a non-contact state with respect to the connecting rod 6 between the diaphragm 4 and the governor valve 7.

In the drawing, 18 is a pressure regulating spring that biases the diaphragm 4 in the opening direction of the governor valve 7, that is, upward, 19 is an adjustment screw for the pressure regulating spring 18, and 20 is a spring that biases the water pressure responsive valve 9 in the closing direction. shows.

Next, the operation will be explained. According to the operation of the hydraulic response device 10 when water is flowing, the hydraulic response valve 9 is moved to the left opening side against the spring 20 via the connecting rod 11, and the gas inlet is opened. 15 flows into the gas chamber 3 through the valve hole 8, and at this time, the diaphragm 4 is deviated up and down due to the balance between the gas pressure and the spring force of the pressure regulating spring 18, and due to the increase in gas pressure. Connect with this 6
When the gas pressure decreases, the governor valve 7 connected to the pressure spring 18 is moved downward to the closed side, and as the gas pressure decreases, the governor valve 7 is moved upward to the open side. Gas under pressure flows to the gas outlet 13 and is supplied to a burner (not shown) via the gas flow path 1 leading thereto.

In addition, during this pressure adjustment operation, the connecting rod 6 may be slightly eccentric from the normal axial center position, and the connecting rod 6
If the other connecting rods 11 are not intersected with each other with a gap, the connecting rods 6 will come into contact with the other connecting rods 11 and interfere with their movement, making it impossible to obtain accurate pressure regulating operation. However, since the gas chamber 3 formed in the valve housing 2 of the governor valve 7 is generally prepared with a relatively large diameter for the above-mentioned reason of pressure regulation characteristics, both connections are made in the gas chamber 3. When the rods 6 and 11 intersect, there is sufficient space to create a sufficient gap to prevent interference between the rods 6 and 11. In order to create this space, the gas chamber 3 and therefore the valve housing 2 are designed to be particularly large. There's no need to do it.

As described above, according to the present invention, the hydraulically responsive valve 9 is provided on the peripheral side of the gas chamber 3 provided in the valve housing 2 of the governor valve 7, and the hydraulically responsive valve 9 is placed inside the gas chamber 3 and connected to the governor valve 7. It is connected to an external hydraulic response device 10 via a connecting rod 11 that is inserted so as to intersect with the connecting rod 6 that connects the diaphragm 4, and the valve housing 2 is used as a valve housing for the hydraulic responsive valve 9. Compared to the case where the valve casings of the valves 7 and 9 are shared and provided separately, the entire device is significantly smaller, and the gas chamber 3 is originally formed with a relatively large diameter. Even though it is not particularly large compared to the conventional valve, it is possible to intersect the two connecting rods 6, 11 with a sufficient gap so that they do not interfere with each other, and ensure reliable operation of each valve 7, 9. It has the effect of

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of one example of the present device, and FIG. 2 is a cross-sectional plan view taken along the line -- in FIG. 1... Gas flow path, 2... Valve housing, 3... Gas chamber,
4...Diaphragm, 5...Valve hole, 6...Running rod,
7... Governor valve, 8... Second valve hole, 9... Water pressure responsive valve, 10... Water pressure responsive member, 11... Connection rod.

Claims (1)

[Scope of utility model registration request] Gas chamber 3 in valve housing 2 interposed in gas flow path 1
A diaphragm 4 on one side and a valve hole 5 on the other side facing the diaphragm 4 are provided, and a governor valve 7 connected to the diaphragm 4 via a connecting rod 6 faces the valve hole 5. In the gas chamber 3, a second valve hole 8 is provided in the circumferential side of the intermediate portion between the diaphragm 4 and the valve hole 5, and a hydraulically responsive valve 9 is made to face the second valve hole 8. A gas control valve characterized in that a connecting rod 11 connected to an external hydraulic response device 10 is inserted into the gas chamber 3 so as to cross the connecting rod 6 three-dimensionally, and is connected to the response valve 9. Device.