JPS6242258Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the structure of a nozzle in a nozzle for a gas cutting and welding machine.

(Prior art) When igniting the crater of a gas cutting or gas welding machine, manual ignition using a spark lighter, etc.
Automatic ignition, which was invented earlier by the present inventor, converts the pressure of high-pressure oxygen gas into impact force, applies impact force to the piezoelectric element, and generates high voltage, thereby creating a connection between the nozzle tip and the outer cylinder tip. There are two ignition methods: automatic ignition by generating a spark by electric discharge.In the case of automatic ignition, an outer cylinder and a specially constructed nozzle are attached to the torch head via an adapter with a built-in automatic ignition mechanism; In the case of manual ignition, the barrel and ordinary nozzle are attached directly to the torch head with a tightening nut.

By the way, in the past, the nozzle for manual use and the nozzle for automatic use each had a dedicated structure, and it was impossible to directly attach the nozzle for automatic use to the torch head together with the outer cylinder for manual use.

(Problems to be Solved by the Invention) In this way, in the past, the nozzle for a manual ignition nozzle and the nozzle for an automatic ignition nozzle were not compatible and could not be used together. It was inconvenient to use.

The present invention was developed to solve these problems, and its purpose is to enable the nozzle to be used both as an automatic ignition nozzle and a manual ignition nozzle by simply attaching and removing some parts. This is how it was done.

(Means for solving the problem) For this purpose, the present invention provides a thick collar portion 2.
And integrally with this, there is a cylindrical body part 3 in which a large number of slits 4 are provided in the direction of the outer circumferential axis of the slightly tapered tip part, and in the direction of the central axis between this cylindrical body part 3 and the collar part 2. A high pressure oxygen gas flow hole 5 is provided through the cylindrical body portion 3, and a plurality of mixed gas flow holes 6 are provided at the periphery of the end face of the collar portion 2 and around the high pressure oxygen gas flow hole 5. A metal nozzle body 1 that extends outwardly and extends through the base of the nozzle body 1, an annular insulator 7 that is externally attached to the collar 2 of this nozzle body 1, and an annular insulator 7 that is externally attached to this insulator 7. A high pressure oxygen gas flow hole 16 is provided at the center of the end surface of the metal annular body 10 and the cylindrical body portion 15 which has a high pressure oxygen gas flow hole 16 in the central axis direction.
A protrusion portion 17 having a rectangular cross section is integrally provided with a portion of the nozzle body 1 opened symmetrically, and the protrusion portion 17 protrudes from the flange portion 2 of the nozzle body 1. The cylindrical body portion 15 is characterized by a structure including a metal conductor 14 that is removably inserted into the high-pressure oxygen gas passage hole 5 of the nozzle body 1.

(Function) Next, the function of the present nozzle having the above configuration will be explained.

First, when the present nozzle is used as an automatic ignition nozzle, it is attached to the torch head together with the outer cylinder via an adapter incorporating an automatic ignition mechanism, as shown in FIG.

That is, the metal annular body 10 is fitted and fixed to the collar portion 2 of the nozzle body 1 via the annular insulator 7, and the conductor 14 is inserted and fixed in the high pressure oxygen gas flow hole 5 of the nozzle body 1. A nozzle (see FIG. 1) formed by the above structure forms a mixed gas passage 21 in an outer cylinder 19 made of metal such as brass, and is coaxially arranged with the annular body 10 in contact with the collar 20. At the same time, the tip portion of the cylindrical body portion 3 of the nozzle body 1 and the outer cylinder 19
An insulator 22 such as ceramic is interposed between the nozzle body 1 and the outer cylinder 19, so that the nozzle body 1 and the outer cylinder 19 are electrically insulated.
The outer cylinder 19 and the nozzle body 1 are respectively arranged as discharge electrodes so that a spark discharge occurs between their sparking points 23 and 24.

The outer cylinder 19 into which the nozzle is inserted is fitted with a tightening nut 25.
It is coaxially connected to an adapter 26 made of metal such as brass.

Hole 2 penetrated in the direction of the central axis of the adapter 26
7 includes a built-in piezoelectric element (not shown),
A movable piezoelectric body 28 is composed of a metal collision protrusion 29 provided in contact with the anode (+) side of the piezoelectric element, a permanent magnet 30 provided on the opposite side thereof, and the like.
The collision protrusion 29 is movably provided in the axial direction so as to coaxially face the protrusion part 17 of the nozzle,
Further, a nozzle 31 having a gas flow hole 32 is fixed to the slightly narrowed end of the hole 27, and a nozzle 31 having a gas flow hole 32 is fixed to the end of the hole 27 on the nozzle body side. Insulator 33
A coil spring 34 is interposed between the insulator 33 and the movable piezoelectric body 28 for self-returning the movable piezoelectric body 28, and is inserted through the hole 27 in the axial direction. The plurality of mixed gas flow holes 35, the holes 36 of the insulator 33, and the mixed gas flow holes 6 of the nozzle body 1 are brought into matching communication, and the nozzle body 1 is electrically insulated via the insulator 33. Adapter 26 and tightening nut 25
is connected and fixed via the adapter 26.
is connected to the torch head 37 by screws, with the hole 32 of the nozzle 31 and the mixed gas flow hole 35 being in matching communication with the high pressure oxygen gas jetting hole 38 and the mixed gas jetting hole 39 of the torch head 37, respectively. Ru.

When the valve of the main body is opened and the high pressure oxygen gas and the mixed gas are supplied, the high pressure oxygen gas is supplied from the hole 38 into the hole 32 of the nozzle 31 and its pressure becomes high. When the attractive force acting between the movable piezoelectric body 28 and the permanent magnet 30 is exceeded, the pressurized high-pressure oxygen gas is released and the movable piezoelectric body 28 instantly closes the hole 2.
7 in the axial direction against the elasticity of the spring 34, the collision protrusion 29 of the movable piezoelectric body 28 collides with the conductor 1.
4 (see FIG. 8).

When the movable piezoelectric body 28 is blown off, the high-pressure oxygen gas in the hole 27 passes through the gas flow hole 16 of the conductor 14 from the gap between the movable piezoelectric body 28 and the inner peripheral wall of the hole 27 to the gas in the nozzle body 1. It is ejected from the flow hole 5 to the outside.

On the other hand, at the same time as the high-pressure oxygen gas is ejected to the outside, a high voltage is generated in the piezoelectric element of the movable piezoelectric body 28 due to the impact force caused by the collision, and a collision protrusion 29 is generated at one electrode (+) of the piezoelectric element. The outer cylinder 19 is electrically connected to the sparking point 24 of the nozzle body 1 through the adapter 26 and the other electrode (-) of the piezoelectric element through the tightening nut 25.
As a result of spark discharge occurring between the sparking point 23 of the torch head 37 and the mixed gas outlet 3 of the torch head 37,
The mixed gas flowing outward from the slit 4 through 9 - the pores 35 of the adapter 26 - the holes 36 of the insulator 33 - the throughflow pores 6 of the nozzle body 1 - the passage 21 is ignited.

After ignition by discharge, the movable piezoelectric body 28 is maintained in a colliding state under the pressure of continuously supplied high-pressure oxygen gas, and a fusing operation is performed.

When the valve is closed and the gas supply is stopped, the pressure of the high pressure oxygen gas that was pressing the movable piezoelectric body 28 disappears, so the movable piezoelectric body 28 is pressed against the spring 3.
It is attracted to the nozzle 31 by the returning action of the permanent magnet 4 and the attraction action of the permanent magnet 30, completely closing the hole 32, and returning to the original state shown in FIG.

Next, when the present nozzle is used as a manual ignition nozzle, as shown in FIG. directly to the torch head 37, its high pressure oxygen gas injection hole 38, the high pressure oxygen gas flow hole 5 of the nozzle body 1, the mixed gas injection hole 39, and the mixed gas flow hole 6 of the nozzle body collar 2, respectively. They are connected and fixed in mating communication, and are ignited and used by a normal ignition means such as a spark lighter.

(Example) An example of the present invention will be described based on the drawings.
The nozzle of the present invention includes a nozzle body, an annular insulator, a metal annular body, and a conductor.

The nozzle body 1 is made of metal such as brass, and has a thick flange 2 and a number of slits 4 at equal intervals along the outer circumferential axis of the slightly tapered tip.
A high-pressure oxygen gas passage hole 5 is provided in the central axis direction of the cylindrical body 3 and the flange 2. , and around the high-pressure oxygen gas passage hole 5, a plurality of mixed gas passage holes 6 are provided at equal intervals and extend outwardly from the base of the cylindrical body 3.

The annular insulator 7 includes an annular portion 8 that covers the outer circumferential surface of the flange portion 2 of the nozzle body 1 and an end surface on the gas outflow side that is connected to the outer peripheral surface and that does not interfere with the mixed gas flow pores 6. An annular portion 9 having a small diameter is integrally formed, and this insulator 7 is externally attached to the nozzle body flange portion 2.

An annular body 10 made of metal such as brass is an insulator 7
An annular portion 11 and an annular portion 9 that fit tightly into an annular portion 8 of
The annular body 10 has an annular portion 12 having a slightly small diameter and a stepped portion 13 that engages with the nozzle body 1.

The conductor 14 is made of metal such as brass, has an outer diameter that is approximately the same as the inner diameter of the high-pressure oxygen gas passage hole 5, and has a slightly slender cylindrical body having a high-pressure oxygen gas passage hole 16 in the direction of its central axis. 15, and a protrusion portion 17 having a rectangular cross section integrally protruding from the central portion of the end face with a portion of the high pressure oxygen gas flow hole 16 left and right symmetrically opened. There is.

The conductor 14 is removably inserted into the high-pressure oxygen gas flow hole 5 of the nozzle body 1 using the tapered tip 18 of the cylindrical body 15 as a guide, and the protrusion 17 Only the nozzle body flange portion 2 can be attached in such a manner that it protrudes from the end surface of the flange portion 2.

(Effect of the invention) As is clear from the above explanation, the nozzle of the present invention can be used for automatic ignition by inserting a conductor into the nozzle body, and can be used manually by inserting and removing the conductor. Since it can be used for ignition, it can be used for both, and there is no need to separately manufacture one for automatic ignition and one for manual ignition, as in the past, but only the conductor can be manufactured separately. It is inexpensive in terms of cost, and it is easy and convenient to handle since it is only necessary to insert and remove the conductor during use.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of an example of a nozzle according to the present invention, FIG. 2 is an end view seen from two directions of arrows in FIG. 1, and FIG. 3 is a vertical cross-sectional view with the conductor removed. Fig. 4 is an end view seen from the direction of arrow 4 in Fig. 3, Fig. 5 is an enlarged plan view of the conductor, Fig. 6 is a sectional view taken along the same line as above, and Fig. 7 is a crater for automatic ignition. FIG. 8 is a vertical cross-sectional view showing the movable state of the movable piezoelectric body in FIG. 7, and FIG. 9 is a vertical cross-sectional view taken at a manual ignition nozzle. 1...Nozzle, 2...Brim part, 3...Cylinder body part,
4...Slit, 5...High pressure oxygen gas flow hole, 6
...Mixed gas flow hole, 7...Annular insulator, 10...
...Metal annular body, 14...Conductor, 15...Cylinder part, 16...High pressure oxygen gas passage hole, 17...Protrusion part.

Claims (1)

[Scope of utility model registration request] It has a thick flange portion 2 and a cylindrical body portion 3 integrally formed with the thick flange portion 2 in which a number of slits 4 are provided in the direction of the outer circumferential axis of a slightly tapered tip portion. A high-pressure oxygen gas flow hole 5 is provided in the central axis direction of the collar 2, and a plurality of mixed gas flow holes are formed on the periphery of the end surface of the collar portion 2 and around the high-pressure oxygen gas flow hole 5. a metal nozzle body 1 in which a pore 6 extends outwardly and extends through the base of the cylindrical body 3; an annular insulator 7 fitted over the collar 2 of the nozzle body 1; A metal annular body 10 externally attached to this insulator 7 and a cylindrical body part 15 having a high pressure oxygen gas flow hole 16 in the central axis direction are provided at the center of the end surface thereof. A protrusion part 17 having a rectangular cross section is integrally provided with a symmetrical opening, and the protrusion part 17 protrudes from the flange part 2 of the nozzle body 1. A structure of a nozzle in a crater, in which a cylindrical body part 15 is provided with a metal conductor 14 that is removably inserted into a high-pressure oxygen gas passage hole 5 of a nozzle body 1.