JPS5918605B2 - Gas valve operating mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has two combustion sections, and when operating the gas valve mechanism that controls the combustion of each section using two or more operation mechanisms, it is possible to For example, in a remote control mechanism in a bathroom for circulating heating of a bath, where combustion is desired, a gas valve operation mechanism is provided with a temporary stop mechanism during operation, and prevents the bath from being heated by operation from another location. The purpose of this design was to ensure that abnormal heating such as empty heating of the bathtub did not occur.

FIG. 1 shows a gas circuit in which there are two combustion sections.

Parallel gas paths connecting the first main valve 1a and the second main valve 1b are led to the first main burner 2a and the second main burner 2b, and are further parallel to the gas paths of the main valves 1a and 1b. There is a gas line connected to a pilot valve 3, the ends of which branch to each combustion section and are connected to a first pilot burner 4a and a second pilot burner 4b.

There are also two sets of thermocouples heated by the pilot burners 4a and 4b, and a first thermocouple 5a and a second thermocouple 5b are connected to each of the first magnetic valve 6a and the second magnetic valve 6b to form two sets. Form the pilot safety device.

The safety switches 7a and 7b are activated by temperature and hydraulic pressure to prevent accidents such as burnout.

Reference numeral 8 denotes an auxiliary pilot burner located at the end of the quick release valve 9, and although it is located near the first pilot burner 4a in the figure, it may also be located on the second pilot burner 4b side.

10 is the igniter, both pilot burners 4a * 4
The first ignition electrode 11a is used to ignite the first ignition electrode 11a.

It is connected to the second ignition electrode 11b.

Now, the two magnet valves 5a and 5b are connected in series on the inlet side of the gas circuit, and after passing through both magnet valves, the above-mentioned first main valve 1a, second main valve 1b, pilot valve 3, and quick release valve 9 are connected in parallel.

The igniter 10 includes both ignition electrodes 11a and 11b.
The structure is configured to generate sparks at the same time as the temperature increases.

Since the magnetic valves 6a and 5b are in series, both pilot burners 4a and 4b are ignited, respectively, and each thermocouple 5
This device can only be used when heating a and 6b, and the entire gas circuit is closed even if either pilot burner misfires.

As a result, the pilot burner that did not fire also goes out, and both magnetic valves eventually become closed.

Since the circuit is in series, the time from when the pilot burner misfires to when the gas stops is determined by the same factors as when there is only one combustion section, and the time may be extended if there are multiple combustion sections. There is no.

By the way, since two magnetic valves are inserted in series in the gas circuit, it is necessary to press both at the same time to open the valves so that they can be held by suction.

A specific example is shown in Figure 2.

The operating shaft 12 includes a first cam 14 that opens and closes the first main valve 1a;
A second cam 15 that opens and closes the second main valve and a pilot cam 16 that opens and closes the pilot valve 3 are fixed so that the six valves are opened and closed depending on the shaft rotation angle.

A connecting bottle 13 is fixedly inserted near the tip of the operating shaft 12 .

11 and 18 are a fixed cam and a rotor, respectively, and each has an appearance as shown in FIG.

Cam pins 19 and 20 passing through the rotor 18 in the radial direction protrude from its outer peripheral surface, but since the cam pins are separated by a cam pin spring 21, they can be freely retracted by applying an external force.

Now, let's explain this operation using FIG.

The tip of the operating shaft 12 is inserted into the rotor 18 (see Fig. 2), and the connecting pin 13 is inserted into the groove 18 of the rotor 18.
It's in B.

Further, the cam pin 19°20 protrudes in the radial direction below the fixed cam 11.

As shown in FIG. 4, when the operating shaft 12 begins to rotate, the connecting pin 13 and the groove 18B engage, and the rotor 18 begins to rotate.

When the cam pins 19 and 20 also begin to rotate, the cam pins 19 and 20 hit the slope 17A of the fixed cam 17, so that the entire rotor 1B moves downward while rotating along the slope.

Therefore, the positional relationship between the groove 18B and the connecting pin 13 also changes,
Eventually, the connecting pin 13 comes to rest on the stepped portion 18C.

This occurs when the cam pin 19.degree. 20 is rotated by exactly 90 degrees, and the cam pin 19.degree. 20 leaves the range of the slope 17A and collides with the fixed cam 170 and 17B, and one rotation is stopped.

In addition, although the slope 17A that supported the cam pins 19 and 20 has already passed, the rotor is supported by the connecting pin 13 and the spring reaction force of the return spring 24 and the magnet valves 5a and 5b, which will be described later, acts to prevent the rotor from moving. 18 holds the lower position.

At this position, if the rotational torque applied to the operating shaft 12 is released or if it is slightly turned in the opposite direction, the locking at the stepped portion 18C is released and the rotor 18 returns to its original position.

The above is the ignition operation, and rotor 1 is rotated by 90 degrees at ℃.
8 can be displaced downward and returned to its original position,
Using this operation, the magnetic valve 6a is constructed.

The valve opening pressing operation 6b can be performed.

That is, the drive shaft 22 that is in contact with the lower part of the rotor 18 has a large-diameter portion 22A in the middle, and a suppressing member 23 that is swingably supported by the large-diameter portion 22A is provided.

Since the suppression member 23 is always pressed against the large diameter portion 22A by the relief spring 21, the movement of the rotor 18 is transmitted through the drive shaft 22 and relief spring 21 to the pressure member.

A push shaft 23A is fixed to one end of the suppression member, and the first
It faces the magnetic valve 6a, and the other end faces the interlocking shaft 26 positioned so as to suppress the second magnetic valve 6b.

Reference numeral 24 denotes a spring that is biased in a direction that always pulls the drive shaft 22, the suppressing member 23, and the rotor 18 away from the magnetic valve.

Further, 25 is a bellows that gas-seals the interlocking shaft 26 and does not prevent axial movement.

Therefore, the rotor 18 is moved by the magnet valve 6a.

6b.

At the same time, the lower surface tapered portion 18A of the rotor 18 is connected to the quick release valve 9.
When the magnetic valve is held open, the air in the gas pipe will be expelled all at once.

At this time, although not shown in Fig. 2, it is also possible to open and close the ignition switch that starts the igniter by protruding the shaft to the outside with the same configuration as the quick release valve 3, so operate it as shown in Fig. 4. Rotate the shaft from (stop) to (ignition) and magnetic valve 6! The operation 54 can be performed by opening the valves L and 5b, closing the quick release valve 9, turning on the ignition switch, and opening the pilot valve 3.

Next, when the rotor 18 is returned upward in FIG. 2 using the operating shaft 12, the quick release valve 9 is closed, and although not shown, the ignition switch is turned off, and the suppressing operation of the magnet valve (i am 6b) is also released.

If the ignition is ignited and the temperature is ℃, the magnetic valve will remain open because it is self-holding.

Also, since the pilot valve was opened by the pilot cam, it is unrelated to the movement of the rotor 18.

Next, when the operating shaft 12 is further turned, the cam pin 19.20 will move to the third position.
It hits the escape groove 17E of the fixed cam 11 shown in the figure and is retracted inward from the outer peripheral surface of the rotor, so that rotation is not hindered.

The shape of each cam is determined so that a rotation of 135 degrees opens the first main valve 1a, and a rotation of 180 degrees opens the second main valve 1b.

The open/close states of both main valves can be arbitrarily selected.

When returning to its original position, the cam pins 19 and 20 escape inward, so the rotor 18 rotates without moving up or down.

Now, let's consider a case where the present invention is applied to a combined combustion machine that combines an instantaneous water heater and a bath pot. burner.

Instantaneous water heaters are usually provided with a water-responsive gas valve upstream of the main burner that is opened by water flow, but this is a known technique and is provided separately from the gas valve operating mechanism of the present invention. The temperature is omitted in the figure.

The safety switches 7a and 7b are thermoswitches that operate at the temperatures of the instantaneous water heater heat exchanger and the bathtub heat exchanger, respectively.

Consider a case where the combustion of these burners is remotely controlled from multiple locations, for example, the bathroom and the kitchen.

5 to 1, reference numeral 12 denotes an operating shaft to which a first set of remote control mechanisms 2B&, 28b is attached, and can be rotated by a first bundle 29.

A locking cam 30 is attached coaxially with this bundle 29, and a protrusion 31 of the locking cam 30 is connected to the locking button 32.
If it hits the locking piece 32A that is integrated with the locking piece 32A, it cannot be rotated any further.

This position is just after the first main valve 1a is opened.

At this time, when the locking button 32 is pressed down over the locking spring 34, the contact between the protruding portion 31 and the locking piece 32A disappears, so it rotates further to open the second main valve 1b, and in this case, the bath is heated. I can do it.

Note that 33 is a stop bottle that comes into contact with the locking valve 32B to prevent rotation.

The lower surface of the protrusion 31 of the locking cam 30 has a second
There is a vertical portion 31A that collides when turning the main valve in the opening direction, but there is a slope 31B when turning the main valve in the opposite direction, so the locking piece 32A is pushed down here as it rotates.

Therefore, the rotation is stopped only when the second main valve 1b is opened, but there is no interference when it is closed.

Next, the operating shaft 12 has a second set of remote control mechanisms 35a.

35b is also attached, and the second bundle 36 can also be rotated.

However, when the second bundle 36 is turned, the first bundle side is also turned, so the second main valve 1b cannot be opened on the second bundle side.

Therefore, the operating section of the bundle 29 is now provided in the bathroom, and the operating section of the bundle 36 is now provided in the kitchen.

Then, in the kitchen, the first main valve 1a can be opened and the instantaneous water heater can be operated to obtain hot water, but the bath burner cannot be operated.

When heating the bath, the bundle 29 must be turned while pressing the locking button 32 in the bathroom where the bundle 29 is located.

This is because in the case of circulating heating of a bath, it is necessary that there is water in the bathtub, so it is possible to operate it only in the bathroom where the presence of water can be confirmed.

As explained above, according to the present invention, combustion is only possible in places where the presence of the object to be heated can be easily confirmed, such as water in a bathtub, and therefore cases of dry firing are greatly reduced.

On the other hand, instantaneous water heaters that have a water-activated gas valve to prevent dry heating do not lose their convenience because they can be used to burn water from any position.

Furthermore, even when the operation shaft 12 is extended to operate directly, the relationship with other remote control mechanisms can be the same as described above.

[Brief explanation of the drawing]

Fig. 1 is a gas circuit diagram showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the operating mechanism, Fig. 3 is an exploded perspective view of its main parts, and Fig. 4 is a gas circuit diagram showing an embodiment of the present invention.
The figure is an operation explanatory diagram, Figure 5A is a front view of one operation part, and Figure 5B is a front view of one operation part.
6 is a front view of the other operating section, FIG. 6 is an overall system diagram of the remote control mechanism, and FIG. 7 is a side view of the locking cam. 1a...first main valve, 1b...second main valve.

Claims (1)

[Claims] 1. A gas valve mechanism that performs an ignition operation by rotation, an opening operation for the first main valve by the next rotation, and an operation for opening the second main valve by further rotation. The valve is configured to be rotatable by a plurality of operating mechanisms, and a specific operating mechanism is provided with a rotation locking mechanism that can be released when rotating from the open position of the first main valve to the open position of the second main valve. gas valve operating mechanism. 2. The gas valve operating mechanism according to claim 1, wherein the second main valve is inserted into the combustion section for bath circulation heating, and an operating mechanism having a releasable rotation locking mechanism is installed in the bathroom.