JPS58187727A - Spark ignition type torch - Google Patents

Abstract

PURPOSE:To improve the safety function by providing a burner which has spark electrodes and receiving terminals and a torch head having a power sourc side terminal and increasing a gap capacity between a power source side terminals removed from the burner larger than a discharge allowing gap. CONSTITUTION:A burner 1 which has spark electrodes 2, 3 at the front end and receiving terminals 4, 5 at the rear, and a torch head 6 which has power source side terminals 7, 8 connected to the terminals 4, 5 by inserting the burner 1, are provided. The gap capacity between the terminals 7 and 8 is increased larger than a discharge allowing gap in the state that the burner 1 is removed from the head 6. In this manner, unexpected ignition in the head can be effectively prevented, thereby enhancing the safety function.

Description

[Detailed description of the invention] The present invention relates to a spark-ignited torch.

In more detail, <1) A torch head having a spark electrode at the tip and a power receiving terminal at the rear; (11) A torch head having a power supply side clapper to which the power receiving terminal is connected by inserting the fire pit. [It is equipped with an IIU torch, which is designed to start supplying the combustion mixture gas and turn on electricity, to send a spark to the electrode at the tip of the crater, and to ignite the mixed gas flowing out from the tip of the crater. ni:i@do.

Conventionally, with such a torch, the following six problems have been solved. It occurs when the ignition operation is performed while the torch is removed from the tinderbox torch head. In other words, if sparks fly between the power supply side terminals in (1) inside the torch head and fuel gas flows out or leaks inside the torch head, it will ignite and cause combustion.

The purpose of the present invention is to solve such problems.

The present inventor considered the above phenomenon as follows.

This will be summarized based on FIG. 1 (4) and (b).

(a) is a schematic diagram of the 1st stage with the crater + 1) installed and (shown is the 1st schematic diagram of the removed state.) Z is the resistance element of the crater itself. In other words, the spark electrode and receiver It is a comprehensive resistance element between (2) and (4) and (3) and (6) cylinders). Z engineering is spark* fi t
"+ * (3) is the resistance element at the threshold. 2. is the torch head (6) chisel source 11! o resistance as between I terminals +71 and +81 tbb.

z, Iz, can be considered to correspond to the energy gap of the discharge. (9) is powered.

In the state (a), the voltage V of the power supply (9) is 2. +2
The spark is generated at the electrode (23, 131fill) due to the
7+ and (61, t81d connected. Naruko+
41, +7) and the terminal fil, +81, the spark does not fly because of the natural C.

However, in the state (b), the r resistance element zo disappears. In the case of a 9-wire system, there is no voltage drop due to the 2° IC. Therefore, the terminals (41, +51 are disconnected from the fic +71, +8) lIllKtj
, (A), a voltage higher than the specific voltage is applied between the electrodes (21 and +31). In the conventional example, the voltage is
Since the potential difference corresponding to the discharge fF capacity gag is exceeded, a spark will fly between terminals +7+ and +81.

In the past, the reasons for ignition within the torch head due to erroneous operation are thought to be as described above.

The present invention is based on such consideration (clarification of the reason) and provides a means for achieving the above-mentioned object. That is (1) above,
(The phantom structure gt-As a premise, the following is 29.

1) When the nozzle is removed from the torch head, the gear lug capacitance between the power supply side terminals is configured to be as large as the discharge meter capacity gap = 9.

The "gear capacitance" referred to here may be: (1) secured by an electrical insulator, (2) secured by intermittent discussion, and (2) a combination of the above-mentioned (2) and (2).

According to the configuration (■) above, even if the ignition operation is performed with the crater removed, and even if the fuel gas or combustion mixed gas leaks out at that time, the connection between the power supply side terminals will not occur. Spark doesn't start.

If you look at this, you might think, ``Of course, it's just a matter of design.'' However, the actual F′i is not likely 3. This appears to be the case based on the results. This is because there are complaints that with conventional spark torches, unexpected combustion may occur within the torch head. In other words, conventional torches do not take any of the above-mentioned contingencies into account.

On the other hand, dud F! j4 first grasps such problems, investigates the cause of the problem, and as a result,
Based on the facts (phenomenon analysis) K, I came up with a method for solving the problem.

In other words, it is neither a ``natural thing'' nor a ``principal design matter.''

f) The effect of the present invention is to prevent accidental ignition within the torch head, which is a safety function. can be enhanced,
That's what it means.

Next, the present invention will be explained in detail with reference to FIG. 2, a gpIs diagram.

A truncated conical cylindrical 7)' insulating material is attached to the torch head (6) and pressed by a fixing screw. The nozzle (1) is inserted in contact with the insulating material and is fixed with a lock nut (12J).

o: 1 is a fuel gas port, (1 lamp is a preheated oxygen hoard, 1 is a cutting oxygen boat. Insulation material Ll (JK
The holes θ61 and 0 that pass through the rt boat (131 and HVc) are individually shaped. Piezoelectric unit (181
Power source (currently in season. Piezoelectric unit) (18)
The striker 11 against it is enlarged and is internally placed in the man's dam aw & oka. @ is Tot in middle Z9w
), doubles as a support for the compression spring (support) and a support for the piezoelectric unit. The valve seat r23VC is pressed by the striker 01u spring (2), and the magnet (to) is attached to the striker - to the magnetic valve seat (c).
It has been Jlr. The cap +251 is fitted with an O-ring (c) for sealing, and is screwed onto the torch head (6) to attach it to the pad (5) which serves as one electrode of the piezoelectric unit (H). are in contact.

The package (exterior) of the piezoelectric unit (+ barrel) is made of electrically insulating material, and the '4 barrel plate that forms the other electrode.
The tube surrounding one of the power supply side seeds (81) is formed into a protruding shape that is in direct contact with the piezoelectric unit H barrel. In the translation, “
It is a means of restoring the "Giig Yado".

The coil spring ω made of conductive metal is inside I! 1IQ
It is screwed into 11. In other words, the spring (to) is integrated with the crater +1). This spring (to) corresponds to one power receiving terminal (6) K in the summary structure, and is in contact with the electrode plate @ which is the power supply side terminal (8). - The other power receiving terminal (corresponding to 41 is the part (88) of the outer tile 1321 that touches the lock nut 01 K!i.

The part that contacts the lock nut 9 of the torch head (@) is electrically connected through the piezoelectric unit's 1iIE pole contact pin and the camp (to), and is the other power supply 1ml terminal in the summary structure. (7) applies.

Cutting oxygen bow) (T @ inside W! 4th side (to) and tube (2)
A gap is ensured between the insulating material and the cylinder (support), respectively, and nine channels (86) are formed on the outer periphery (3) of the striker Ql, and between the intermediate receptor @ Cutting oxygen is supplied through the flow path C151 formed in 1 and then through the gap 1lIt between them.

The cylinder and the outer cylinder are separated by an insulating material or a gap, so that wI
L9L insulated. Needless to say.

The cylinder @ is made of a conductor such as copper, and the terminal (5) is connected to the electric conductor.
It is electrically connected to el and 1r. The same goes for the outer cylinder □□□.

In addition to supplying fuel gas and oxygen to the crater, 917
#When the supply of oxygen is started, the cutting acid cumulative pressure acts on the striker. When the oxygen pressure increases beyond the dark magnetic attraction force (Coulomb force) k between the magnet prisoner and the valve seat (c), the magnet (to) instantly separates from the valve seat (c). Then, as cutting oxygen flows in, the striker M becomes a piezoelectric unit) 081
Hit the guess @. This allows the unit (I@
The piezoelectric element inside generates electricity, and the electrode +21 at the tip of the crater (1)
, tel . Combustion mixture gas flows out from the tip of the crater (1) and is ignited by a spark.

When the oxygen supply is stopped to stop using the torch, the striker H is moved back to the spring side and the magnet (to) is *Red to the valve seat (2).

Rock Nut Shino's crater tilk) - Chi head (6)
Take it away and make it your friend. At this time, the crater ill and Ikko's sgering tlj% are removed (see No. 8).

In such a situation, if you surround the pulp of vJ oxidation and make it 1 to 9, the cutting oxygen pressure will rapidly assist the blowing element (l trout will hit the piezoelectric unit haze, and the pressure 94 element will Electricity is generated. However, due to the large gear gap caused by an electrically insulating cylinder,
Discharge is prevented, and the generated voltage self-discharges in the internal resistance and the insulation resistance of the output element and disappears naturally. Therefore, even if fuel gas flows out or leaks from the circular portion of the torch head, it will not ignite and the risk of combustion or explosion can be prevented. On the other hand, in the conventional one, the tube (2) is missing, and the electrode plate (2) [
Because sparks were occurring between the terminal (8) and the cross mark 9), ・rono, (/puni), etc., the combustion as described above
There is a risk of explosion.

The spring ci is designed to ensure electrical connection between the inner part 11i (2) and the electrode plate (2) when the spring ci is mounted on the crater 117t)-chi head (6+).

In this example, the addition of the following five qualitative sentences is also a load movement.

■ Instead of the insulating tube (2), use
ri.

The spur electrode on the side of the torch head, such as 9), is covered with a partial sound insulating material.

■ Crater 11) 'k Even if it is removed, the spring (to) will cut the torch head (6) all the way.

■Instead of spring C [K, use a combination of a universal plug and receiving blade (2) as shown in Figures 4 and 5, and connect one side to t' power receiving terminal (5) and the other to power source terminal (8). to do.

Both Figures 4 and 5 show that the gap capacitance is insulating O*Q!
It is secured by a. If it is a friend, please use the insert blade (
c) i Make it into a thin stick shape and surround it with X marks (a), (b), 0
→, 2) It is possible to take a large distance from a part that can become a spark electrode, and instead of a cylinder (support), it is possible to secure it by a gap between the gears and the valley.

■ Not only can it be used with a manual torch, but it can also be used with the two side torches. Cut 111? Of course, it is also good to use IDK for welding, for welding, and for IDK 1. ■ Operating energy for the piezoelectric unit θ barrel It may also be implemented in the form of crossing at an angle (oblique), parallel or coincident.

(2) As the operating energy for the piezoelectric unit, other than oxygen pressure, mechanical or front impact force or compression force may be used.

■ The power source (9) is not limited to a piezoelectric type, but a battery or a commercial power source may also be used.

FIG. FIG. 2, FIG. 8 is a sectional view showing an embodiment of the present invention. Figures 4 and 6 are cross-sectional views of the main parts of different implementations.
...Spark electrode, +41, +61...Power receiving terminal, (6j...Torch head, +71,
Ill...iit source.

Claims (1)

[Claims] ■ It has one spark electrode and fil at the tip, and a power receiving terminal +41 * ('lk crater 11) at the rear,
By inserting this crater 111', the receiver 1i111
! iA +4), power supply side terminal + to which tel is connected
71 , 183 k % A torch head (6) and t are provided, and with the torch head (6) removed from the torch head (6), the gap capacity of the IQ1liE source side terminal +71 and Tl1l threshold is greater than the discharge allowable gap. A large spark ignition torch. ■Special IF where the gap capacitance is based on an electrical insulator
F. A spark ignition torch according to claim 0. ■ A special feature where the gap capacitance is created by spatial separation
[Spark critical type torch described in ice range item 0.