JPS6021664Y2 - Gas burner automatic ignition device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic ignition device for a gas burner.

[Technical background of the invention and its problems]

Conventionally, in this type of automatic ignition system, in the relationship between the ignition system and pilot gas release, it is desirable that gas be ejected from the pilot burner just before the discharge part discharges, so automatic ignition systems equipped with a safety valve have been used. In such a case, the safety valve would not open early at the ignition timing, resulting in a delay in gas reaching the pilot burner.

Furthermore, the structure of the ignition system itself is complicated, there are few that are highly durable, and it is difficult to smoothly interlock the electromagnetic safety valve, electric circuit switch, main burner valve, pilot burner valve, etc. It had the following problems.

[Purpose of invention]

Therefore, this invention solves the above problems, and also
After the electromotive force of the thermocouple becomes sufficient to attract the safety valve, the switch of the electric circuit is turned off to save power, and to prevent accidental discharge and ensure safety. The purpose is to enable people to improve their skills.

[Summary of the idea]

Therefore, in order to achieve the above-mentioned objectives, the present invention has a main shaft attached to the burner case, which is equipped with a drive cam that opens and closes the main burner valve and the pilot burner valve, and a drive cam that temporarily changes the open state of the electromagnetic safety valve. A driven cam that forcibly swings the actuating body to maintain the position is inserted into each driven cam, and a force is applied to the driven cam via a spring to constantly rotate the actuating body in the returning direction. A first compression part that comes into contact with the second compression part and a second compression part that compresses a second pressure part whose rocking center is located at a distance from the first pressure part are formed, and the base axis has a shape approximately parallel to the longitudinal direction of the second compression part. An operating rod is provided protruding in a perpendicular direction, and the driving cam is formed with a rising portion having a width larger than the width of the operating rod and a cavity capable of accommodating the operating rod, and also forms a mounting shaft. The interlocking body is swingably attached to the shaft, a part of the interlocking body is engaged with the operating rod, and the pusher provided on the interlocking body is engaged with the driven part protruding from the driven cam.
The switch cam portion of the driven cam, which is formed to be detachable and can actuate the switch actuating portion, forcibly operates the switch actuating portion when the driven cam maintains the open state of the electromagnetic safety valve via the actuating body. At the very least, the switch of the electric circuit containing the discharge part that generates sparks intermittently while the current is on is turned off.
This is due to the fact that it is formed to be in the N state.

[Example of idea]

To explain one embodiment of the present invention with reference to the drawings below, a main shaft 1 attached to a burner case 16 has a driving cam 4 for opening and closing a main burner valve 2 and a pilot burner valve 3, and an electromotive force of a thermocouple. The actuating body 6 for temporarily maintaining the open state of the electromagnetic safety valve 5 operated by the actuating member 6 is rotatably fitted into a driven cam 7 for forcibly operating the actuating body 6.

The driven cam 7 is always given a force to rotate in the return direction by a spring 8, the base shaft 1 is provided with an operating rod 10 projecting in a direction substantially perpendicular to its longitudinal direction, and the base shaft 1 of the main drive cam 4 is A rising portion 11 is provided at a position away from the.

A cavity 12 is formed in this rising portion 11, and the operating rod 10 is accommodated in this cavity 12.

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

In addition, a mounting shaft 13 is located at a position away from the base shaft 1 of the main drive cam 4.
The interlocking body 14 is swingably attached to the mounting shaft 13, and a part of the interlocking body 14 is engaged with the operating rod 10 with almost no loosening.

A pusher 15 is provided on the side of the mounting shaft 13 from the base shaft 1 of the interlocking body 14, so that the pusher 15 engages and disengages from a driven portion 9 that protrudes from a part of the driven cam 7 in the direction of the interlocking body 14. Form.

Further, the driven cam 7 is provided with a switch cam portion 18 that operates the switch actuating portion 17, and this switch cam portion 18 is configured to:
While the driven cam 7 maintains the open state of the electromagnetic safety valve 5 via the actuating body 6, the switch actuating part 17 is forcibly actuated to generate sparks intermittently while the switch is provided at the starter part and is energized. The switch 21 provided in a part of the electric circuit 20 including the discharge section 19 that generates the electric current is turned on.

In the figure, 22 is the power supply, and 23 is the switch 21 turned on.
24 is a bellows for preventing gas leakage from the switch actuating part 17 when the switch actuating part 17 is used in a position conventionally used as an air vent. However, this may also be used as a backing such as an O-ring.

25 is an ignition gas distribution pipe that sends ignition gas to the pilot part, 26
27 is a second gas reservoir separated from the first gas reservoir 26 by the electromagnetic safety valve 5; 28 is a main burner gas reservoir; 29 is a gas reservoir for the main burner; A gas reservoir for the pilot burner, 30 is an electromagnet that attracts the electromagnetic safety valve 5, and 31 is a first pressure part provided on the driven cam 7. When the driven cam 7 is rotated to the left from the state shown in FIG. , the first pressure part 31 is brought into contact with the first pressure part 32 of the lever-shaped actuating body 6, and the first pressure part 32 is slightly swung to the left.

33 is a second compression part of the driven cam 7;
The second pressurized portion 34 of the actuating body 6, whose center of swing is located at a position farther from the first pressurized portion 32, is strongly and strongly pressed to ensure that the actuating body 6 swings greatly. .

That is, in the configuration of the first compressing part 31 to the second pressurized part 34, it is ideal that gas is ejected from the pilot burner just before the discharge part 19 discharges in relation to the ignition device and the pilot gas release. However, the second compression part 33
If the operating body 6 is moved only by the second pressurized part 34, the electromagnetic safety valve 5 may not open at the ignition timing and the gas may not reach the pilot burner. The first compression part 31 is the first pressured part 32
Slight pressure is applied to swing the actuating body 6 to the left, and the tip of the actuating body 6 presses on the electromagnetic safety valve 5 to open it and send gas from the first gas reservoir 26 to the second gas reservoir 27. At the same time, the pilot burner valve 3 located in the recess 36 provided on the peripheral surface of the main drive cam 4 is pressed by the rotation of the main drive cam 4, and the pilot burner valve 3 is opened.

In this case, the electromagnetic safety valve 5 does not move to the attraction position of the electromagnet 30.

If the actuating body 6 is greatly swung only by the first compression part 31 and the first pressure-receiving part 32, the first compression part 31 and the first pressure-receiving part 32 are likely to be damaged due to friction or the like. In this case, the second pressing portion 33 greatly presses the second pressurized portion 34 to maintain the state in which the electromagnetic safety valve 5 is pressed to the attraction position of the electromagnet 30.

Reference numeral 35 designates a spring mounting portion that applies a force in a direction that always returns the rotatable driven cam 7 to the base shaft 1, and 37 represents a lever that operates the main burner valve 2.

Next, to explain the operation of the valve, the main drive cam 4 is connected to the base shaft 1.
It has the freedom to rotate by the difference between the gap between the cavity 12 and the diameter of the operating rod 10.

On the other hand, a part of the interlocking body 14 is engaged with the operating rod 10 with almost no slack, and the interlocking body 14 swings in response to the rotation of the base shaft 1 immediately.

As a result, when the base shaft 1 is first rotated from the position shown in FIG.

This is done by swinging only the interlocking body 14 around the mounting shaft 13 without rotating the main drive cam 4, causing the pusher 15 to protrude from the main drive cam 4, so that it engages with the driven portion 9 of the follower cam 7. This is what I did.

Next, if the base shaft 1 is rotated as it is, the main drive cam 4 and the driven cam 7 are both rotated to the left at the same speed.

As a result, the driven cam 7, that is, the driven part 9, is forcibly rotated to the left in the figure, and the electromagnet 30 presses the electromagnetic safety valve 5, and the electromotive force of the thermocouple moves the electromagnetic safety valve 5 towards the electromagnet 30.
When it becomes more than necessary to keep it adsorbed, when the base shaft 1 is slightly rotated to the right, the operating rod 10, which has been located on the left side of the gap 12, moves to the right side of the gap 12. .

As a result, the interlocking body 14 swings to the right about the mounting shaft 13, so that the pusher 15 is retracted and the driven part 9 and the pusher 1
5 is disengaged, and the driven portion 9, that is, the driven cam 7 returns to its initial position by the force of the spring 8.

Therefore, after that, by rotating the base shaft 1 to the left, only the main drive cam 4 is forcibly rotated to the left, and the main burner valve 2 can be opened and closed via the lever 37.

When rotating the base shaft 1 to the right to extinguish the gas, the presser 15 is retracted so as not to catch on the driven portion 9, and when the gas is completely extinguished, it returns to the position shown in FIG. 3.

[Effect of idea]

Therefore, on the base shaft 1 attached to the burner case 16, there is a driving cam 4 that opens and closes the main burner valve 2 and the pilot burner valve 3, and an operating body 6 that temporarily maintains the open state of the electromagnetic safety valve 5. A driven cam 7 that forcibly swings is inserted into each driven cam 7, and a force is applied to the driven cam 7 via a spring 8 to constantly rotate it in the return direction, and the first pressured part 32 of the actuating body 6 is The first compression part 31 that comes into contact with
and a second compression part 33 that compresses a second pressure part 34 whose swing center is located at a position farther from the first pressure part 32,
An operating rod 1 is attached to the base shaft 1 in a direction approximately perpendicular to its longitudinal direction.
0 is provided protrudingly, and the driving cam 4 is formed with a rising portion 11 having a width larger than the width of the operating rod 10 and having a cavity 12 in which the operating rod 10 can be accommodated, and a mounting shaft 13 is formed. The interlocking body 14 is swingably attached to the mounting shaft 13, and a part of the interlocking body 14 is engaged with the operating rod 10,
The switch cam portion 18 of the driven cam 7 is formed such that a pusher 15 provided on the interlocking body 14 can engage with and disengage from the driven portion 9 protruding from the driven cam 7, and can actuate the switch actuating portion 17.
When the driven cam 7 maintains the open state of the electromagnetic safety valve 5 via the actuating body 6, the switch actuating part 17 is forcibly actuated to generate a discharge that generates sparks intermittently while the power is on. Switch 21 of electric circuit 20 including section 19 is turned on.
Since it is formed so that the base shaft 1 is rotated, the electromagnetic safety valve 5, the switch 21 of the electric circuit 20, the main burner valve 2, and the pilot burner valve 3 can be smoothly and reliably interlocked.

Also, during energization, the switch 21 of the electric circuit 20 including the discharge section 19 that sends a high voltage current intermittently and generates sparks is turned off.
Switch cam section 18 provided with N and OFF on the driven cam 7
The driven cam 7 rotates together with the base shaft 1 until the electromagnetic safety valve 5 has sufficient electromotive force of the thermocouple, and the electromotive force of the thermocouple becomes sufficient to attract the electromagnetic safety valve 5. After that, the driven cam 7 returns and the switch 21 of the electric circuit 20 can be turned off, stopping the generation of sparks, saving power without wasting power, and preventing unnecessary discharge, making it safer. Improves sex.

In particular, the driven cam 7 includes a first pressure part 31 that comes into contact with the first pressure part 32 of the actuating body 6, and a second pressure part 34 whose swing center is located at a position farther from the first pressure part 32. Since the second compression part 33 is formed to compress the first pressure part 32, when the base shaft 1 is slightly rotated to the left, the first compression part 31 immediately compresses the first pressured part 32, and the actuating body 6 is slightly moved to the left. It can swing, and the tip of the operating body 6 presses the electromagnetic safety valve 5 to open it, allowing gas to be sent from the first gas reservoir 26 to the second gas reservoir 27.

Furthermore, at the same time, the recess 3 provided on the circumferential surface of the driving cam 4
The pilot burner valve 3 located at 6 is pressed by the rotation of the main drive cam 4, and the pilot burner valve 3 is opened.

Then, the second pressurized part 34 can be greatly compressed by the second compression part 33, and the state in which the electromagnetic safety valve 5 is pressed to the adsorption position of the electromagnet 30 can be maintained, and the first pressure part 31 and the first pressured part Damage is less likely to occur than when the actuating body 6 is greatly swung only by the actuator 32.

As explained above, according to the present invention, after the electromotive force of the thermocouple becomes sufficient to attract the safety valve, the switch of the electric circuit is also turned off, so that no sparks are generated. Therefore, power is not wasted and there is no careless discharge, making it highly safe and useful for practical purposes.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic front cross-sectional view, FIG. 2 is a schematic cross-sectional view of the A-A portion in FIG. 1, and FIG. This is a schematic diagram. 1... Base shaft, 2... Valve for crystal/main burner, 3/ Valve for curve/pilot burner, 4... Main drive cam,
5... Solenoid safety valve, 6... Operating body, 7
...Followed cam, 8...Spring, 9
....Driven part, 10..Operating rod, 11.
... Rise part, 12 ... Gap part, 13.
...Mounting shaft, 14...Interlocking body, 15...
...Press element, 16...Case, 17...
...Switch operating part 1.18...Switch cam part, 19...Discharge part, 2o...Electric circuit, 21...Switch, 22... ...Power supply, 23...Ignition transformer, 24...
Bellows, 25...Ignition gas distribution pipe, 26...
...First gas reservoir, 27...Second gas reservoir, 28...Main burner gas reservoir, 29.
...Gas reservoir for pilot burner, 30...
...Electromagnet, 31...First compression part, 32...
....First pressurized part, 33...Second compression part, 3
4...Second pressurized part, 35...Spring mounting part, 36...Recessed part, 37...Lever.

Claims (1)

[Scope of utility model registration request] A main shaft attached to the burner case includes a driving cam that opens and closes the main burner valve and pilot burner valve, and a driven cam that forcibly swings the operating body to temporarily maintain the open state of the electromagnetic safety valve. A force is applied to the driven cam to constantly rotate it in the return direction via the spring, and a first pressing part that comes into contact with the first pressured part of the actuating body and a swinging force from the first pressured part are applied to the driven cam. The driving cam is formed with a second pressing part that presses a second pressured part located at a position apart from the center of motion, and an operating rod is provided on the base shaft to protrude in a direction substantially perpendicular to the longitudinal direction of the main shaft, and the main drive cam includes: A rising portion having a width larger than the width of the operating rod and a cavity capable of accommodating the operating rod is formed, and a mounting shaft is formed, and the interlocking body is swingably mounted on the mounting shaft. The switch cam part of the driven cam is formed so that a part of the driven cam is engaged with the operating rod, and a pusher provided on the interlocking body can engage and disengage from the driven part protruding from the driven cam, and can operate the switch operating part. , includes a discharge part that forcibly operates the switch actuating part when the driven cam maintains the open state of the electromagnetic safety valve via the actuating body, and generates sparks intermittently while the electricity is on. An automatic ignition device for a gas burner, characterized in that an electric circuit switch is formed to be in an ON state.