JPS602383Y2 - Gas valve safety valve actuation device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an operating device for a safety valve of a gas valve.

[Technical background of the invention and its problems]

Conventionally, in the safety valve actuating device of this type of gas valve, the safety valve may not open early at the ignition timing, resulting in a delay in gas reaching the pilot burner, or a starting force may be generated in the thermocouple, causing the electromagnetic safety valve to close. The operating body that presses the electromagnetic safety valve until it is attracted by the electromagnet, the driven cam, etc., do not return easily, the structure of the device itself is complex, there are few products with excellent durability, the electromagnetic safety valve, the main burner valve, etc. This has had a number of problems, such as difficulty in smoothly interlocking the pilot burner valve, etc.

[Purpose and structure of the invention]

Therefore, the purpose of this invention is to solve the problems that existed in the past as described above, and the gist is that the main burner valve and pilot burner valve A main cam that opens and closes each, and a driven cam that forcibly swings the operating body that temporarily maintains the open state of the electromagnetic safety valve operated by the electromotive force of the thermocouple are rotatably mounted. is provided with a driven part that protrudes toward the main drive cam, and is provided with a driven part that always applies a force to rotate in the return direction via a spring. A rising portion protruding between the cam and the driven cam, and the driving cam has a rising portion having a width larger than the width of the operating rod and a cavity capable of accommodating the operating rod, and a mounting shaft disposed apart from the base shaft. and are respectively provided protruding toward the driven cam, and an interlocking body having a presser protruding toward the driven cam is attached to the mounting shaft so as to swing about the mounting shaft, and the presser of the interlocking body is An operating rod accommodating gap is provided in the center of the cam, and the operating rod is engaged with the operating rod with almost no loosening, and the tip thereof is formed so as to be able to press the driven portion of the driven cam.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

On the base shaft 1 rotatably attached to the burner case 16,
A driving cam 4 that opens and closes the main burner valve 2 and pilot burner valve 3, and an actuator 6 that temporarily maintains the open state of the electromagnetic safety valve 5 that is activated by the electromotive force of the thermocouple are forced. The driven cams 7 are rotatably attached to each other.

A force is constantly applied to the driven cam 7 via a spring 8 to rotate it in the return direction.

The base shaft 1 has an operating rod 10 perpendicular to its axial direction.
is provided protruding between the main drive cam 4 and the follower cam 7.

Further, a rising portion 11 that projects toward the driven cam 7 is provided in the main drive cam 4 at a position away from the base shaft 1.

This rising portion 11 has a cavity 12, and the operating rod 10 is accommodated in this cavity 12. The operating rod 10, which rotates together with the base shaft 1, presses the rising portion 11, and the driving cam 4
It is shaped so that it can be rotated.

Note that the width of the cavity 12 is greater than the width of the operating rod 10.

Further, a base shaft 1 is located at a position away from the base shaft 1 of the main drive cam 4.
The mounting shaft 13 is parallel to the axis of the slave.

An interlocking body 14 is installed so as to protrude toward the moving cam 7 and swing around this mounting shaft 13, and an operating rod 10 is installed in an operation rod housing gap 15a of a pusher 15 provided on the interlocking body 14. It is engaged with almost no loosening.

The pusher 15 is formed such that its tip protrudes slightly outward from the periphery of the main drive cam 4 as the interlocking body 14 swings as the base shaft 1 rotates. It is formed to engage and press the driven portion 9 of the driven cam 7 protruding toward the cam 4 in a colliding manner.

19 in the figure is a first gas reservoir located on the gas inlet 17 side with the electromagnetic safety valve 5 as the boundary, in the case 16;
20 is a second gas reservoir separated from the first gas reservoir 19 by the electromagnetic safety valve 5; 21 is a main burner gas reservoir; 22 is a pilot burner gas reservoir; 23 is an electromagnet that attracts the electromagnetic safety valve; 24 is a gas reservoir for the pilot burner; A first pressing portion provided on the driven cam 7, the first pressing portion 24 is the first pressed portion of the lever-shaped actuating body 6 when the driven cam 7 rotates leftward from the state shown in FIG. 25 to swing the actuating body 6 slightly to the left.

26 is a second compression part of the driven cam 7;
6 is capable of strongly and strongly pressing the second pressurized portion 27, whose center of swing is located at a position farther from the first pressurized portion 25 of the groove forming body 6, to ensure that the actuating body 6 swings greatly. This is how it was done.

The structure of the first compressing part 24 to the second pressurized part 27 is such that, in relation to the piezoelectric ignition unit 31 provided on the base shaft 1 and pilot gas release, the piezoelectric ignition unit 31 is ignited from the pilot burner just before the piezoelectric ignition unit 31 is ignited. Ideally, something that would emit gas would be ideal.

In other words, only the second compression part 26 and the second pressurized part 27 actuate the actuating body 6.
If the configuration is such that the electromagnetic safety valve 5 does not open at the ignition timing, there is a risk that the gas will not reach the pilot burner. 24 presses the first pressurized part 25 a little to swing the actuating body 6 to the left, and the tip of the actuating body 6 presses the electromagnetic safety valve 5 to open it, and the first gas reservoir 19
At the same time, the pilot burner valve 3 located in the recess 29 provided on the circumferential surface of the driving cam 4 is compressed by the rotation of the driving cam 4, and the pilot burner valve 3 is opened. It is poised to open.

At this time, the electromagnetic safety valve 5 does not move to the position where the electromagnet 23 is attracted.

When the actuating body 6 is configured to swing greatly only with the first compression part 24 and the first pressured part 25, the first compression part 24 and the first pressured part 25 are likely to be damaged due to friction or the like. Therefore, after that, the second pressing part 26 presses the second pressurized part 27 greatly so that the electromagnetic safety valve 5 can be maintained in a state where it is pressed to the adsorption position of the electromagnet 23. .

In addition, 28 is a mounting part for a spring 8 that always applies a force in the direction of returning the driven cam 7 rotatably attached to the base shaft 1, and 30 is a mounting part for the main drive cam 4 to operate the main burner valve 2. This shows the levers that are connected.

Next, to explain the operation of the valve, the main drive cam 4 has the freedom to rotate by the difference between the width of the cavity 12 and the width of the operating rod 10. Although it has the freedom to swing by the difference between the width of the accommodation gap 15a and the width of the operating rod 10, since the operating rod accommodation gap 15a and the operating rod 10 are engaged with each other with almost no loosening, the interlock 14 is base 1
It begins to oscillate in response to the rotation of the

As a result, when the base shaft 1 is first rotated to the left from the position shown in FIG. 4, the operating rod 10, which was located on the right side of the gap 12 as shown in FIG. 5, is positioned on the left side of the gap 12, and The interlocking body 14 swings to the left, the tip of the pusher 15 projects slightly outward from the periphery of the driving cam 4, and the tip of the pusher 15 engages with the driven portion 9 of the driven cam 7.

Next, if the base shaft 1 is rotated to the left, both the driving cam 4 and the driven cam 7 will rotate to the left at the same speed.

As a result, the driven cam 7, that is, the driven part 9, is forcibly rotated in the left direction as shown in FIG. When the electromagnetic safety valve 5 is brought into pressure contact with the electromagnet 23 by the actuating body 6 that swings through the electromagnet 23, and the electromotive force of the thermocouple allows the electromagnetic safety valve 5 to be attracted to the electromagnet 23, as shown in FIG. If you rotate it a little to the right, you can see that the gap 1
The operating rod 10, which was located on the left side of the main drive cam 2, moves to the right side of the gap 12 without rotating the main drive cam 4 clockwise. 15 is retracted from the periphery of the driving cam 4, the engagement between the driven part 9 and the tip of the pusher 15 is released, and the driven part 9, that is, the driven cam 7, is rotated to the right by the force of the spring 8 and returned to its initial position. It will be done.

Thereafter, by rotating the base shaft 1 to the left as shown in FIG. 8, only the main drive cam 4 is forcibly rotated to the left, and the main burner valve 2 is activated via the lever 30 linked to the main drive cam 4. It can be opened and closed.

When rotating the base shaft 1 to the right to extinguish the gas, the presser 15 is retracted so as not to catch the driven part 9.
When the gas is completely extinguished, it returns to the position shown in Figure 4.

[Effect of idea]

Therefore, on the base shaft 1 rotatably attached to the burner case 16, there is a main drive cam 4 that opens and closes the main burner valve 2 and the pilot burner valve 3, respectively, and an electromagnetic safety valve 5 that is operated by the electromotive force of the thermocouple. A driven cam 7 that forcibly swings the operating body 6 that temporarily maintains the open state is rotatably attached to each driven cam 7, and a spring 8 is attached to the driven cam 7.
In addition to applying a force to constantly rotate in the returning direction,
A driven portion 9 protruding toward the driving cam 4 is provided protrudingly, and the base shaft 1
, an operating rod 10 that is perpendicular to the axial direction is provided protruding between the driving cam 4 and the driven cam 7, and the driving cam 4 has an operating rod 10 with a width larger than the width of the operating rod 10. A rising portion 11 having a cavity 12 capable of accommodating 10 and a mounting shaft 13 disposed apart from the base shaft 1 are respectively provided to protrude toward the driven cam 7. The interlocking body 14 having the depressor 15 protruding from the center is mounted so as to swing about the mounting shaft 13, and the depressor 1 of the interlocking body 14 is
5 is provided with an operating rod housing gap 15a in the center of which the operating rod 10 is engaged with almost no loosening, and the tip is formed so that it can press the driven part 9 of the driven cam 7. The electromagnetic safety valve 5, the main burner valve 2, and the pilot burner valve 3 can be reliably and smoothly interlocked by only the rotational operation.

In addition, all necessary controls can be performed simply by rotating the base shaft 1, making it extremely convenient, and the operation linkage is reliable, making it difficult to break down, improving durability, and allowing safe use over a long period of time.

In particular, when the ignition state of the pilot burner is sufficient and the electromagnetic safety valve 5 is attracted to the electromagnet 23, by simply rotating the base shaft 1 slightly to the right, only the interlocking body 14 is activated without affecting the main drive cam 4. By swinging, the driven cam 7 can be rotated to return to its initial position using the force of the spring 8, and power in the piezoelectric ignition unit 31 can be saved without wasting power.

The driven cam 7 includes a first pressure part 24 that comes into contact with the first pressure part 25 of the actuating body 6, and a second pressure part 27 whose swing center is located at a position farther from the first pressure part 25. By forming the second compression part 26 that compresses, when the base shaft 1 is slightly rotated to the left, the first compression part 24 immediately compresses the first pressured part 25 and the actuating body 6 is slightly moved to the left. The tip of the operating body 6 presses the electromagnetic safety valve 5 to open it, and the first gas reservoir 19 is opened.
Gas can now be fed into the second gas reservoir 20 from there.

Furthermore, at the same time, the recess 2 provided on the peripheral surface of the main power arm 4
The pilot burner valve 3 located at 9 is pressed by the rotation of the main drive cam 4, and the pilot burner valve 3 is opened.

Then, the second pressurized part 27 can be greatly compressed by the second compression part 26, and the state in which the electromagnetic safety valve 5 is pressed to the adsorption position of the electromagnet 23 can be maintained, and the first pressure part 24 and the first pressured part Damage is less likely to occur than when the actuating body 6 is greatly swung by only the actuator 25.

As explained above, according to the present invention, all necessary controls can be performed reliably and smoothly just by rotating the base shaft, the device is easy to handle and highly safe, the device itself is simple in configuration, and there is no possibility of failure. In addition to being difficult, it can be provided at a low cost and has extremely excellent practical effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front sectional view of the gas valve, FIG. 2 is a partial side sectional view of the gas valve, FIG. 3 is an enlarged plan sectional view of the driven cam portion, and FIG. 4 is a cross-sectional view of the gas valve. 8 are further enlarged plan sectional views of the driving cam and the interlocking body portion. 1... Base shaft, 2... Main burner valve, 3... Pilot burner valve, 4...
...Driver cam, 5...Solenoid safety valve, 6...
...Operating body, 7...Followed cam, 8...
・Spring, 9... Driven part, 10...
・Operating rod, 11... Rising part, 12...
・Gap part, 13...Mounting shaft, 14...
Interlocking body, 15... Presser, 15a...
Operating rod accommodation gap, 16... Case, 17...
...Gas inlet, 18...Filter 19.
...First gas reservoir, 20...Second gas reservoir, 21...Main burner gas reservoir, 22
・・・・・・Gas reservoir for pilot burner, 23...
...Electromagnet, 24...First compression part, 25.
...First pressure part, 26... Second pressure part,
27... Second pressurized part, 28... Spring mounting part, 29... Recessed part, 30...
・Lever, 31...Piezoelectric ignition unit.

Claims (1)

[Scope of utility model registration request] A main shaft rotatably attached to the burner case has a drive cam that opens and closes the main burner valve and pilot burner valve, and an electromagnetic safety valve operated by the electromotive force of a thermocouple that temporarily maintains the open state. A driven cam that forcibly swings the actuating body is rotatably attached to each driven cam, and the driven cam is always given a force to rotate in the return direction via a spring, and a driven part that protrudes toward the main driving cam. is protruded from the base shaft, and an operating rod that is orthogonal to the axial direction is provided between the driving cam and the driven cam, and the driving cam has a width larger than the width of the operating rod and an operating rod that is perpendicular to the axis direction. A rising portion having a cavity in which the rod can be accommodated and a mounting shaft disposed apart from the base shaft are respectively provided to protrude toward the driven cam, and each of the mounting shafts has a presser protruding toward the driven cam. The interlocking body is mounted so as to swing around the mounting shaft, and the presser of the interlocking body is provided with an actuating rod accommodation gap in the center that engages the actuating rod with almost no loosening, and the tip of the interlocking body is provided with an actuating rod housing gap that engages the actuating rod with almost no loosening. 1. An operating device for a safety valve of a gas valve, characterized in that a driven part is formed so as to be pressable.