JPS5831222A - Torch with ignition mechanism - Google Patents

Abstract

PURPOSE:To improve processing freedom of a piezo-electric body, by so constituting that the piezo-electric body and a mechanical impacting system for the piezo-electric body are provided on a torch head so that high voltage of the piezo-electric body is led to a tip electrode through an electric conductor, in a torch with ignition mechanism for metal cutting. CONSTITUTION:Valves of a fuel gas pipe 22 and a preheating oxygen pipe 23 are opened, a piezo-electric body 2 is hitted by a striker 12 through an operation of a trigger 14 for generation of electromotive force. A spark is generated by action of the electromotive force to spark electrodes 42 and 43 through electric conductors 33 and 34 and a tip inner pipe 32, and mixture gas is ignited. With this constitution, a piezo-electric system can be made larger than a tip and freedom for process and structure can be improved as it becomes unnecessary to provide the piezo-electric body and the striker within a gas flowing duct and a resistance and disturbance of a gas flow is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a large-scale technology for a torch used for welding and/or cutting metals.

Lighting a torch is usually done using a lighter or a torch, but this can be a problem if you don't have a lighter or a torch, or if you lose it at night, and you may get burned when igniting it, making it difficult to handle. In addition, it required a cumbersome operation such as holding the torch with one hand and igniting it with the other hand.

Recently, a torch with an ignition mechanism attached to the nozzle was disclosed in Japanese Patent Laid-Open No. 56-68712'5+. The piezoelectric element, its actuator, a magnet for attracting the actuator, a lead wire to the spark electrode at the tip of the nozzle, and other related parts are attached to the inside of the nozzle that is attached to the torch, and the fuel gas and preheated oxygen gas are When the pulp in the supply pipe is opened, the flow pressure of the combustible mixture of both gases pulls the actuator away from the magnet, and the actuator is given momentum to collide with the piezoelectric element, and the generated electromotive force creates a spark at the tip of the crater. The device automatically ignites the flammable gas flowing out from the tip of the crater, and is very easy to use, as there are no problems such as losing a lighter or match.

However, on the other hand, because a large number of various parts are incorporated inside the crater, the structure becomes extremely complex and the work becomes troublesome. Not only does this have the disadvantage of increasing the efficiency of the fuel cell, resulting in a significant increase in cost, but also because the supply of flammable mixed gas is not very expensive, and large piezoelectric elements cannot be used, so the electromotive force tends to be insufficient and ignition errors can occur. Easy to occur.

In order to increase the flow #th rE applied to the piezoelectric element, it is possible to use the flow pressure of the high-pressure cutting element gas, but this abbreviation is based on the cutting oxygen gas flow in the crater, and the flow of various oxygen gases in the channel. Obstacles protrude and disturb the flow, which may result in a decrease in the intended cutting performance. In addition, since the FE piezoelectric element magnet is located close to the flame, it is susceptible to deterioration due to conduction heat through the crater body.

As an improvement measure that improves Mt on these points, there is a proposal to provide the piezoelectric mechanism in the torch head, which is larger than the nozzle and has a higher degree of freedom in processing and features.

Based on this idea, the present invention takes a step further from relying on pressure fluid as the source of impact energy to the piezoelectric element. Unless certain conditions are met, only high-pressure cutting oxygen gas can be used, and flammable mixed gases cannot be used in most cases1. The application of the pick is actually limited to cutting torches. Although it is inside the torch head, inserting a piezoelectric element or other moving parts into the cutting oxygen gas flow path will still cause resistance to flow and turbulence, which will cause instability of the cutting oxygen flow. Undesirable. Moreover, if you try to use fuel gas or preheated oxygen gas, the pressure is low, so the impact energy and eventually the electromotive force will be insufficient, and the possibility of failure to ignite increases at once.

The torch with an ignition mechanism according to the present invention has been comprehensively considered, including the Kashi point, and has a piezoelectric body attached to the torch head equipped with a torch, and a mechanical shock that generates an electromotive force by applying a shock to the piezoelectric body. A force applying mechanism is attached, and a conductor is provided across a pair of electrodes formed at the tip of the crater and a pair of receiving electrodes for the high voltage generated by the piezoelectric body.

That is, since the impact energy source to the piezoelectric body is mechanical, it can be applied not only to cutting torches but also to welding torches that do not use cutting oxygen gas.

There is no need to install the piezoelectric body or its striker in the gas flow path, or even if it faces the gas flow path, it can be placed in a fixed position, thereby reducing resistance and turbulence to the gas flow. I won't give it.

Furthermore, it is relatively easy to devise ways to make the mechanical impact force constant, whether in terms of structure or operation. Therefore, the ignition performance can be improved as a whole.

Embodiments of the present invention will be described below based on the drawings.

(b) is a torch head in which the nozzle (a) is inserted from the front and fixed by tightening the nut (1).A piezoelectric body (2) is built into the rear part of the torch head, and a mechanical control for the piezoelectric body (2) is installed. An impact force applying mechanism (c) is installed.

The piezoelectric body (2) consists of an outer cylinder (3), an insulator (4), a piezoelectric element (5), a stopper (6), and a presser foot (7). (8)
is a nut screwed onto the rear end of the torch head (b) through a banking (9), and by interposing a compression spring (1) between the nut (8) and the piezoelectric body (2), the piezoelectric body The current (6) of (2) is always in contact with the rear end of the crater pipe (2).

The impact force applying mechanism (c) applies bucking (backing) to the nut (8).
The main element is a trigger (141) for the striker (121), which is slidably inserted through the striker (11), a spring that gives energy to the striker (121), and a trigger (141) for the striker (121).
Reference numeral 151 denotes a trigger holder, which is integrally extended from the torch head (b) and has a pivot shaft (19) that engages in the long hole t161K of the trigger (14).The trigger 11 is in the long hole (16).
4) A small spring (1 role) is inserted to bias the striker (121 side).

The trigger is 114) Helical spring for return.

The tip of the trigger (14) has a Taber surface f'XjI, and correspondingly, the head of the striker (17J) also has a Taber surface [21
). When the trigger (141 is hit in the direction between the arrows), the bird 114 swings, causing the striker +15 to move backward while resisting the spring 03. When the tip of the trigger (141) comes off the head of the striker (12), the spring (i
The accumulated power of the force is expressed, and the striker (121 suddenly fires forward,
Hit the presser foot (7) of the f6 piezoelectric (21). At the same time, the dowel (6) is hit from inside the crater/1f1321, and a high pressure is generated due to the pressure fit effect. Trigger 1
14) is the spring tl! l) returns to the Taber surface (η, (2+1 guide and small spring (18
1, the trigger (14) is moved again by the head rest by sliding against the axis f171K of the elongated hole (16).
121 Automatically engages the head. The timing of release from the trigger (141) or striker (121) is determined.
Therefore, the stored force of the spring (131), the speed, striking force, and electromotive force of the striking element (121) are always kept constant.

The torch head (b) includes a fuel gas pipe +26, a preheated oxygen pipe (for example, the inside of the cut oxygen pipe), which are connected and fixed to this 11α from the front to the rear in a mutually parallel posture, and a communication line ii1.Ill corresponding to each pipe. prisoner), prisoner, @ and annular chamber Udl * 1291 * Cl ■ are formed.

The crater (a) consists of a crater body (31) and a crater inner pipe 02), both of which are mainly composed of copper, with a pressure of 411 (2
) to transmit the high voltage generated by the collision to the tip of the crater (al). Also serves as a conductor (341). A linear flow connecting the annular chamber (ground and tip annular outlet c18) of the crater preheating oxygen. A plurality of passages (3gl) are perforated in the circumferential direction (swaging). (401 is a flow passage connecting the annular chamber for fuel gas and the linear flow passage @E. The crater inner pipe (2) is located near the rear end. has a cutting oxygen flow iM 1411 connected to the annular chamber αIIK at the rear end of the torch head.

A pair of electrodes 13, +43) where the tip of the crater body l31) and the tip of the crater inner tube □□□ constitute a spark point.
It becomes. The rear half of the crater body (31) is connected to one electrode of the high voltage generated from the piezoelectric body (2) through the torch head (b), that is, the outer tube (31K) and serves as the receiving electrode phase.The inner tube of the crater c121 The rear end is a piezoelectric material (2)
The other receiving electrode (there are 4) receives the high voltage generated by the

The ignition procedure is as follows.

■ Open the pulp in the middle of the fuel gas pipe (branch) and preheated oxygen pipe □□□.

(2) Operate the trigger (14) to strike the piezoelectric body (2) with the striker 1; 2) to generate an electromotive force. This is the conductor C1
1 (l.

The crater body +311, which is cl4), acts on the spark electrodes (421, +431 through the inner tube) to generate sparks and ignite the combustible mixed gas described in iiQ.

Next, important examples of application are listed.

■ Simplify the impact force applying mechanism (cl) as shown in Fig. The striker (121) is moved hyperactively to strike the piezoelectric body (2) at 11g.

■ Trigger ll4) etc. are omitted from the one in Figure 1. In this case, the striker (121) is pulled out by hand against the spring (13) and then released.

(2) It is optional whether the positive electrode or the i-pole of the piezoelectric element (5) is used in the front direction.

■ A lead wire may be used as the conductor country 041, especially b1+1. In this case, it is also possible to use a crater (a) that is almost the same as the conventional one.

(2) In addition to the above-mentioned mixed-type crater, it can also be applied to a mixed-type blowpipe-type cutter. In this case, the cut oxygen tube (241) is omitted, and instead, the preheated oxygen tube becomes the cut oxygen tube, and the fuel gas tube becomes a mixed gas tube of preheated oxygen and fuel gas.
An example of this is shown in Figure 8.1, where +461, +
49 is an insulator. The crater interior is divided into a front part (82a) and a rear part (82b), which are screwed together. The crater body (31) is also divided into a front part (81a) and a rear part (81b), both of which are connected by a threaded nut (481).

It may also be applied to two welding torches.

An example of this is shown in FIG. In this case, the mixed gas is introduced through the vibrator (221). (a) is a welding nozzle, and the internal nozzle (43) is fixed to the external nozzle (31) via an insulating material.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings illustrate embodiments of a torch with an ignition mechanism according to the present invention, and FIG.
The figure is a partial sectional view of an application example, FIG. 8 is a sectional view of a subsequent mixed type cutting torch, and FIG. 4 is a sectional view of a welding torch. (aJ...crater, color]...Torch head, (C)...Impact force applying mechanism, (2)...
... Piezoelectric body, (12) ... Striker, +131
, Spring for (1B'), (14)...
...Trigger, (171...Kishu+JfH,!
19)...Spring, Bl) River...Taber surface, L' (31, +341--- IP electric body, +
421- (43) 川-'iiii (revised, +4.11
, (451...Receiving electrode. 31st to 4th figure 7''.

Claims (1)

[Claims] ■ A torch head (bJ, piezoelectric body (2)) equipped with a torch (a), and a mechanical impact force applying mechanism (cJ) that applies an impact to the piezoelectric body (2) to generate an electromotive effect. A pair of electrodes fa, +43) formed at the tip of the crater (a) and a pair of receiving electrodes (441, +43) for high voltage generated by the piezoelectric body (21) are connected to a conductor (441, (21)). (121
The torch with an ignition mechanism according to claim 0, wherein the torch is configured to be movable back and forth. (1) The impact force applying mechanism (c) is a torch with an ignition mechanism according to claim 0, wherein the impact force applying mechanism (c) is provided with a spring (13) that applies impact energy to the impact force. The applying mechanism (c) moves the striking element (121) against the spring (131) by swinging in the state of engagement with the striking element f+3, and triggers a trigger (I41) that releases the engagement when the swing is 1 J or more. 1--chi with an ignition mechanism as set forth in claim 0 of the ship's permit. ■ The trigger (141 is a return spring ++gl
Claims IT
A torch with a training mechanism described in f4, item (■). ■ The above-mentioned impact force applying mechanism (c) and its impactor (121
A spring (18
A torch with an ignition mechanism according to claim 0, comprising: ■ The conductor q, (341 is also used as the crater (at component itself), 4'F Claims 0 to 0
A torch with an ignition mechanism as described in any of the above.