JPS6037491Y2 - Hydraulic response device diaphragm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic response device in a water heater, and more particularly to a diaphragm of a hydraulic response device that simultaneously operates an automatic gas valve and an ice governor.

In pre-stop water heaters such as instantaneous gas water heaters, when the hot water tap is opened, a water pressure response device is activated to automatically open the gas valve and at the same time operate a water governor that maintains the water supply pressure at a constant level. ing.

As a conventional diaphragm of this type of hydraulic response device, those shown in FIGS. 1A to 2 have been proposed.

In the case shown at port 49 in FIG. 1, a hole is made in the center of the diaphragm membrane a, and the diaphragm membrane is held between a water governor guide d, a seat plate C, and a diaphragm desk b.
The structure is assembled by tightening with a nut e, or by crimping.

In addition, in the case shown in the same figure, a protrusion f and a water governor guide d' are integrally molded on the diaphragm membrane a', and a hole corresponding to the protrusion f is made in the diaphragm desk b. The protrusion f is inserted into the hole of the diaphragm desk b.
The structure is such that the diaphragm membrane a' and the diaphragm disk b are fixed by being fitted into the diaphragm disk b.

The one shown in FIG. 2 is the same as that shown in the previous part, but the water governor guide is omitted.

By the way, in the hydraulic response device as described above, the operating rod of the automatic gas valve is pressed against one surface of the diaphragm membrane, and
The tip of the water governor is in contact with the other surface, and when the hot water tap is opened, the diaphragm membrane moves to operate the automatic gas valve and water governor. Those with holes drilled in them are extremely unsatisfactory in terms of durability because the membrane tears due to frequent operation.

In addition, in the structures shown in Fig. 1 C and 2, it is necessary to deform the protrusion f having a larger diameter than the hole formed in the diaphragm desk b and forcefully fit the protrusion f into the hole of the diaphragm disk. Therefore, the workability of assembly is extremely poor, and there is a risk that the protrusion f will come off from the hole of the diaphragm desk b and the diaphragm desk b will fall off due to frequent operation.

The present invention improves the problems of the conventional technology as described above, and has excellent durability without causing membrane tearing or falling off of the diaphragm desk even when the hydraulic response device is frequently operated. The purpose is to provide a diaphragm.

In order to achieve the above object, the present invention provides a diaphragm in which a diaphragm membrane is narrowed by a thin metal disk-shaped diaphragm disk and a water governor guide made of a thin metal plate. drilling a plurality of holes to form an expanded recess in the center of the ice governor guide, and forming an outer peripheral edge extending outward by folding downward from the outer periphery of the expanded recess; The present invention is characterized in that the vicinity of the central portion of the diaphragm desk and the outer periphery of the water governor guide are embedded in a thick central portion of the diaphragm membrane and integrally connected to the diaphragm membrane.

An example of implementation of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 is a longitudinal sectional view showing an embodiment of the diaphragm according to the present invention, and FIG. 3 is a front view of the same.

In these figures, 1 is a diaphragm membrane, which is vulcanized and molded together with a metal diaphragm disk (hereinafter abbreviated as diaphragm disk) 2 and a water governor guide 3, as will be described later.

The diaphragm desk 2 has a thin disk shape with a folded edge 2a on the outer periphery and a plurality of holes 2b drilled near the center.

The water governor guide 3 is made of a thin metal plate, and has a recess 3b in the center that expands toward the rear end, and a recess 3b that is folded downward from the outer periphery of the expanded recess 3b and extends outward. An extended outer peripheral edge 3a is formed.

Then, the desk 2 and the water governor guide 3 are placed in a heating and pressurizing mold (not shown) for a diaphragm hollow type while maintaining a distance that allows the diaphragm membrane to be sandwiched between them.
The material of the diaphragm membrane is press-fitted into the heat-pressing mold and heated to form an annular protruding part 1a on the outer periphery and an annular protruding part 1b bulging on the surface, and a thick part 1c in the center. A diaphragm membrane having the following properties is vulcanized and molded.

In this way, the vicinity of the central portion of the diaphragm disk and the outer peripheral edge 3a of the ice governor guide 3 are located within the thick portion 1c.
It is possible to combine them into one body while the two are buried.

That is, the material of the diaphragm membrane covers the vicinity of the center of the diaphragm desk and is integrally joined to the material on the water governor guide side through the hole 2b, and a part of the material covers the outer peripheral edge 3a of the water governor guide. The top is covered and the diaphragm membrane 1 is vulcanized and molded by heating and pressurizing in this state, so that the diaphragm membrane 1, the diaphragm disk 2, and the water governor guide 3 are joined together.

FIGS. 4 and 5 are explanatory views of the operation of the hydraulic response device using the diaphragm as described above.

When you want to get hot water, first open the gas inflow pipe 4 and the water flow pipe 1.
The main valve 0 (not shown) is opened, the knob 6 provided on the gas appliance plug 5 is operated to the ignition position, and the pilot burner 7 is ignited via the ignition mechanism (not shown).

Next, when either the tap 8 or the shower tap 9 is opened, water flows into the hydraulic response device 11 from the water pipe 10.

Inside this hydraulic response device 11, there is a high pressure chamber 11a and a low pressure chamber 1.
A diaphragm 1 is stretched so as to partition the desk 2 and the desk 2 on the diaphragm surface of the low pressure chamber 11b.
The end of the operating rod 13 protruding from the automatic gas valve 12 is brought into contact with the end of the operating rod 13, and the tip of the water governor 14 is inserted into the recess 3b of the water governor guide 3 located at the center of the diaphragm surface on the high pressure chamber 11a side. The flowing water passes through the outflow pipe 15 of the high pressure chamber 11a and flows into the low pressure chamber 11b through the connecting pipe 17 provided at the throat of the venturi 16.

At this time, a pressure difference is created due to the Venturi effect, so as the water pressure in the high pressure chamber increases, the diaphragm 1
is pushed in the direction of the low pressure chamber 11b as shown by the solid line arrow in FIG. 5, and the operating rod 13 connected to the automatic gas valve 12 is pushed up against the spring 12a to open the gas valve 12b.

Therefore, the gas flows through the gas conduit 1 downstream from the gas valve 12b.
8 → Manifold 19 → Burner 2 from nozzle tip 20
The hot water is ignited by the flame of the pilot burner 7 to heat the water in the heat exchanger 22, and the hot water is supplied from the tap 8 or the shower 9 side.

Also, when you close the open hot water tap 8 or the shower 9,
The water pressures on the high pressure chamber tla side and the low pressure chamber 11b side become equal,
The diaphragm 1 is returned to its original position by the restoring force of the spring 12a, and the automatic gas valve 12 is closed to stop supplying gas to the burner 21, and the burner 21 is extinguished.

In this way, the diaphragm 1 of the hydraulic response device has the operating rod 13 protruding from the automatic gas valve 12 pressed against it on the low pressure side, and the tip of the water banner 14 on the high pressure side. Each time the shower faucet 8 or shower faucet 9 is opened and closed, the automatic gas valve 12 must be moved a sufficient distance to open and close the automatic gas valve 12, and the frequency of use is extremely high. I was extremely unsatisfied with this point.

In contrast, in the present invention, a plurality of holes are bored near the center of the thin metal diaphragm desk, and an expanded recess is formed in the center of the thin metal water governor guide. An outer periphery is formed by folding downward from the outer periphery of the expanded concave portion to form an outer periphery extending outward, so that the vicinity of the center of the diaphragm desk and the outer periphery of the water governor guide are connected to the center of the diaphragm membrane. Since the diaphragm desk, water governor guide, and diaphragm membrane are embedded in the thick part of the diaphragm and are integrally connected to the diaphragm membrane, the diaphragm desk, water governor guide, and diaphragm membrane form an extremely strong integrated structure, which allows the diaphragm to be easily operated even under frequent operation of the diaphragm. , there is no risk of membrane tearing or separation of the diaphragm desk and water governor guide from the diaphragm membrane, and the expanded concave part of the water governor guide is exposed to the surface and the outer periphery is buried in the thick part of the diaphragm membrane. Therefore, when the tip of the ice governor fits into the expanded recess of the water governor guide and moves the diaphragm membrane in parallel, no undue stress is applied to the diaphragm membrane, and this reduces the durability of the diaphragm. can significantly improve performance.

In addition, in the present invention, as mentioned above, the diaphragm desk, water governor guide, and diaphragm membrane are integrally constructed from the beginning, so there is no need for the conventional assembly process, and the cost can be reduced accordingly. However, the quality can be improved.

[Brief explanation of the drawing]

1 to 2 are vertical sectional views of a conventional diaphragm, FIG. 2 is a vertical sectional view showing an example of the implementation of the diaphragm of the present invention, FIG. 3 is a front view thereof, and FIG. 4 is a hot water heater equipped with a diaphragm. FIG. 5 is an enlarged sectional view of a portion of FIG. 4. 1... Diaphragm membrane, 1a... Annular protrusion, 1b... Annular protrusion, 1c...
・Thick part, 2...Diaphragm desk, 2a・
...Folded edge, 2b...Hole, 3...
...Water governor guide, 3a...Outer edge, 3b
・・・・・・Concavity.

Claims (1)

[Scope of utility model registration request] In a diaphragm in which a diaphragm membrane is sandwiched between a thin metal disc-shaped diaphragm desk and a water governor guide made of a thin metal plate, a plurality of holes are bored near the center of the diaphragm desk, and a plurality of holes are bored in the center of the water governor guide. forming a diffused recess, and folding downward from the outer periphery of the expanded recess to form an outer peripheral edge extending outward;
A diaphragm for a hydraulic response device, characterized in that the vicinity of the center of the diaphragm desk and the outer periphery of the water governor guide are embedded in a thick center portion of the diaphragm membrane and integrally connected to the diaphragm membrane.