JPS6049813B2 - crater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle for a gas welder or fuser.

Traditionally, gas lighters, matches, etc., were used to ignite the vents of gas welders and fusers, but with these ignition methods, the igniters such as matches got wet with rain and could not be ignited. There were problems such as getting tired, getting burnt, and being very troublesome as it took a lot of time to search.

The present invention was made to solve these problems, and its purpose is to install the ignition means inside the high-pressure oxygen introduction pipe and open the valve of the gas path to allow the gas to flow. The purpose is to provide a tinder that can automatically, reliably, and safely ignite. For this purpose, the present invention provides a cylinder having a high-pressure oxygen introduction hole and a mixed gas introduction hole, a nozzle connected to this cylinder, a high-pressure oxygen introduction pipe provided inside the cylinder, and a high-pressure A stator, a part of which is made of a magnetic material or a permanent magnet, is fixed in the large diameter part of the oxygen introduction tube with its through hole communicating with the high pressure oxygen introduction hole, and a stator that is partially made of a magnetic material or a permanent magnet, and the high pressure gas is pushed through the through hole of the stator. An impactor, a portion of which is made of a permanent magnet or a magnetic material, moves in the axial direction within the large diameter portion of the high-pressure oxygen introduction tube due to pressure, and one piezoelectric element to which an impact is directly or indirectly applied by the impactor. and a piezoelectric element holding cylinder which holds the piezoelectric element and electrically connects its cathode to the nozzle via the high pressure oxygen introducing pipe and cylinder, and the anode of the piezoelectric element which is connected to the nozzle through the high pressure oxygen introduction tube and the cylinder. A conductive tube that is electrically connected to the jet nozzle, and a high-pressure oxygen tube that is connected to the conductive tube and has an insulating gap holder protruding from its outer periphery to maintain a constant gap with the nozzle. The device is characterized by a configuration including a jet nozzle.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

Figure 1 is a longitudinal sectional view of the whole, Figures 2 to 13 are longitudinal sectional views and side views of the main parts, and Figure 14 is a longitudinal sectional view of the whole showing the operating state. A step 2 is formed near the inner rear end of the cylindrical body 1, and a step 3 is formed on the outer periphery of the rear end. A high-pressure oxygen introduction hole 4 is provided between the step portions 3 and 2, and a plurality of mixed gas introduction holes 5 are provided between the step portions 3 and 2. Screws 6 and 7 are formed on the outer periphery.

Reference numeral 8 denotes a nozzle connected to the front end of the cylindrical body 1 by tightening a nut 10, and this nozzle 8 is made of metal such as copper, and a gas having a diameter smaller than the inner diameter of any part is attached to the tip of the nozzle 8. A blowout hole 9 is formed.

11 is a high pressure oxygen introduction pipe, as shown in Fig. 2A and b,
The front half has a large diameter and the rear half has a small diameter.
A screw 12 is formed on the inner periphery of the tip of the large diameter portion, and
Steps 13 and 14 are formed at the rear of this screw 12, a through hole 15 is bored between the step 14 and the rear end surface, and a screw 16 is formed from the step 14 to the rear end. but,
Furthermore, screws 17 are formed on the outer periphery of the rear end.

The high-pressure oxygen introduction tube 11 has its screw 17 screwed into a screw 18 formed on the inner circumferential surface of the high-pressure oxygen introduction hole 4 of the cylinder body 1, thereby communicating the through-hole 15 and the high-pressure oxygen introduction hole 4. At the same time, a mixed gas passage 19 is formed within the cylinder body 1 and between the inner peripheral surface of the cylinder body 1 and the inner peripheral surface of the cylinder body 1 .

A stator 20 is fixed in the large diameter part of the high pressure oxygen introduction tube 11, and a part thereof is made of a magnetic material or a permanent magnet. As shown in FIGS. 3A and 3B, the outer diameter of the large diameter portion is approximately the same as the inner diameter of the large diameter portion of the high pressure oxygen introduction tube 11, and the high pressure oxygen introduction tube is located at the center of the tube. A through hole 21 communicating with the through hole 15 of No. 11 is drilled, and this stator 20 has a shape on the outer periphery of the small diameter portion at the rear end. The screw 22 thus formed is screwed into the screw 16 of the high-pressure oxygen introduction tube 11 to communicate the through hole 21 and the through hole 15, and the large diameter portion of the front end is connected to the inner circumferential surface of the large diameter portion of the high pressure oxygen introduction tube 11. They are fixed in close contact.

23 is a high pressure oxygen introduction pipe 11 located in front of the stator 20
This is an impactor disposed in the large diameter part of the impactor, which is partially composed of a permanent magnet or a magnetic material, and has a slit 24 formed in the center and one end outside. The diameter is approximately the inner diameter of the rear portion of the large-diameter stepped portion 13 of the high-pressure oxygen introduction tube 11, and a permanent magnet 25 is fitted in this portion.
The outer diameter of the other end is approximately the same as the inner diameter of the large-diameter step 13 of the high-pressure oxygen introduction tube 11, and an impact protrusion 26 is integrally provided in the center of this portion. Four through holes 27 are bored in the axial direction, and the impactor 23 is arranged with its permanent magnet 25 side facing the stator 20 side. It is designed to be able to move in the axial direction within the large diameter portion of the high pressure oxygen introduction tube 11 by the pressing force of the gas. 28
is a coil spring interposed between the piezoelectric element holding tube 29 connected to the front end of the large-diameter portion of the high-pressure oxygen introduction tube 11 and the impactor 23, and as described later, the coil spring is connected to the front end of the large-diameter portion of the high-pressure oxygen introduction tube 11. It has a function of moving the impactor 23 reliably rearward at times.

Therefore, the spring force is set at a position where the impactor 23 is attracted to the stator 20 by the action of the permanent magnet 25 and reliably moves rearward when the gas supply is stopped. It is sufficient if the child 23 can be pressed. As shown in FIGS. 5A and 5B, the piezoelectric element holding cylinder 29 has a large diameter section on one side and a slightly small diameter section on the other side, and a screw 30 is provided on the inner periphery of the tip of the large diameter section. Screws 31 are formed on the outer periphery of the small diameter portion, and four through holes 33 are bored in the axial direction between the rear end surface and the stepped portion 32 in the large diameter portion, and this holding cylinder 29 is formed as described above. To,
The screw 31 is connected to the screw 12 of the large diameter part of the high pressure oxygen introduction pipe 11.
It is installed by screwing it into the

34 is a cylindrical piezoelectric element having a cathode (-) formed on one end surface and an anode (+) formed on the other end surface.
4 is a holding cylinder 29 via an insulating cylinder 35 made of ceramic or the like.
The cathode (1) side is located at the rear (on the impactor 23 side) in the small diameter portion of the impactor 23 .

As shown in FIGS. 9A and 9B, the insulating cylindrical body 35 has a large diameter portion 3.
6 and a small diameter part 37, a step part 38 is formed at the inner rear end of the large diameter part 36, and four through holes 39 are bored between this step part 38 and the rear end surface of the large diameter part 36. The insulating cylinder 35 accommodates the piezoelectric element 34 in its small diameter part 37, and positions the small diameter part 37 side rearward in the piezoelectric element holding cylinder 29, and also connects the through hole 39 to the through hole. 31, and the rear end surface of the large diameter portion 36 is engaged with the stepped portion 32.

Numeral 40 is a piezoelectric element-enclosing nut screwed onto the cathode (-) side of the piezoelectric element 34 and into the small diameter portion of the piezoelectric element holding tube 29, and has a hole 41 in its center.

Reference numeral 42 denotes a stopper provided in the hole 41 of the nut 40 in a non-pullable shape and with the rear end 43 (on the impactor 23 side) slightly protruding, and is electrically connected to the cathode (1) of the piezoelectric element 34. When the protrusion 26 of the impactor 23 collides with the rear protrusion 43 of the stopper 42, an impact is applied to the piezoelectric element 34.

44 is a conductive tube electrically connecting the anode (+) of the piezoelectric element to a high-pressure oxygen jet nozzle, which will be described later;
As shown in b, it consists of a large diameter part and a slightly longer small diameter part,
The anode (+) of the piezoelectric element 34 is slightly press-fitted into the small diameter part 37 of the insulating cylinder 35 at the center of the rear end surface of the large diameter part.
A contact protrusion 45 is provided to protrude and electrically contact the rear end surface of the large diameter portion, and a cross-shaped slit 47 communicating with a center through hole 46 drilled from the small diameter portion to the large diameter portion is provided on the rear end surface of the large diameter portion. Furthermore, a screw 48 is formed on the outer periphery of the tip of the small diameter portion, and the contact protrusion 45 of the conductive cylinder 44 is slightly press-fitted from the front end of the small diameter portion 37 of the insulating cylinder 35 as described above to connect the piezoelectric element. 34 in electrical contact with the anode (+), and a slit 4 in the through hole 39 of the insulating cylinder 35.
7 are communicated with each other, and the end face of the large diameter portion is engaged with the large diameter step portion 38 of the insulating cylinder 35.

Reference numeral 49 denotes an insulating cylinder made of ceramic or the like that is inserted into the small diameter portion of the conductive cylinder 44, and 50 is attached to the insulating cylinder 49 by fitting the screw 51 onto the screw 30 of the piezoelectric element holding cylinder 29. 52 is a nut for enclosing the anode (+) side of the piezoelectric element 34 , and 52 is an insulator such as ceramic that is attached to the outer peripheral tip of the insulating cylinder 49 . It insulates the anode (+) and cathode (-) of.

53 is a high-pressure oxygen jet nozzle made of copper or the like;
As shown in FIGS. 3A and 3B, an oxygen jetting part 54 having an outer diameter smaller than the diameter of the gas jetting hole 9 of the nozzle 8 is formed at the tip, and at the rear of this oxygen jetting part 54, A tapered surface 55 that widens afterward is formed in the shape of an entire arc with no corners,
Further, a tapered surface 55 that widens backward is formed at the rear end, and a screw 57 is formed on the inner periphery of the rear end, and furthermore, the outer periphery close to the tapered surface 55 is connected to the inner periphery of the nozzle 8. An insulating gap holder 58 made of ceramic or the like is protruded to maintain a constant gap, and this high pressure oxygen jet nozzle 5
3 screws together the screw 57 and the screw 48 of the conductive cylinder 44 so that the rear end surface is butted against the front end surface of the insulator 52, and at the same time, a constant gap is created between the screw 57 and the inner peripheral surface of the nozzle 8 by the gap holder 58. A gas passage 59 is formed in the nozzle 8 .

Next, to explain the operation, this nozzle is used by screwing the screw 6 of the cylinder 1 into the screw in the nozzle attachment hole of the torch (not shown), and the gas burner valve shown in Figure 1 is used. The through hole is closed and gas is not supplied, that is, the stator 20 and impactor 23 are attracted by the attraction action of the permanent magnet 25, and the through hole communicates with the high pressure oxygen introduction hole 4 via the through hole 15. 21 is closed by the impactor 23, first, the valve of the gas burner is opened and mixed gas is supplied, and this mixed gas flows through the mixed gas passages 19, 59 from the mixed gas introduction hole 5. After that, the gas is ejected from the gas ejection hole 9 of the nozzle 8.

Subsequently, when high-pressure oxygen is supplied, the high-pressure oxygen introduction hole of the cylindrical body 1 is connected to the through-hole 15 of the high-pressure oxygen introduction pipe 11 and the stator 20.
Pressure from high pressure oxygen gas is applied to the end face of the permanent magnet 25 of the impactor 23 through the through hole 21 .

Then, as shown in FIG. 14, the impactor 23 is moved forward against the action of the Kosil spring 28, and the impactor 23
Impact protrusion 26 or piezoelectric element 34 protruding from the front surface of 3
The rear end protrusion 4 of the stopper 42 is in contact with the cathode (-) of
3, and as a result, the cathode of the piezoelectric element 34 (
1), the high-pressure oxygen from the through hole 21 is released into the air created between the outer circumferential surface of one end (rear end) of the impactor 23 and the inner circumferential surface of the large-diameter portion of the high-pressure oxygen introduction tube 11. The oxygen is ejected from the gap through the through hole 27 of the impactor 23, the through hole 33 of the piezoelectric element holding cylinder 29, the slit 47 and the through hole 46 of the conductive cylinder 44, and from the oxygen ejection part 54 of the high pressure oxygen ejection nozzle 53 to the outside.

Also, almost at the same time, a high voltage is generated in the piezoelectric element 34 due to the impact received from the impactor 23 that collided with the piezoelectric element 34.

Therefore, the outer circumferential surface of the tip of the high-pressure oxygen jet nozzle 53 electrically connected to the anode (+) of the piezoelectric element 34;
A discharge occurs between the cathode (-) and the inner peripheral surface of the tip of the nozzle 8 which is electrically connected, and the mixed gas passing through the gas ejection hole 9 of the nozzle 8 is ignited by the discharge.

In this case, an arc-shaped tapered surface 55 with no corners is formed at the tip of the high-pressure oxygen jet nozzle 53, and the nozzle 8
Since the gap with the inner circumferential surface of the high-pressure oxygen jet nozzle 53 is maintained constant by the insulating gap holder 58 protruding from the outer circumferential surface close to the tapered surface 55 of the high-pressure oxygen jet nozzle 53, the discharge occurs between both nozzles 8. 53, and as a result, the mixed gas is reliably ignited.

Thereafter, the impactor 23 is maintained in the collision state shown in FIG. 14 under the pressure of high-pressure oxygen that is successively supplied, and operations such as welding and cutting of metal are performed.

Furthermore, when the gas burner valve is closed, the pressure of high-pressure oxygen that presses the impactor 23 is eliminated, so that the impactor 23, along with the auxiliary action of the coil spring 28,
It is attracted to the stator 20 by the attraction action of the permanent magnet 25, and returns to the original state shown in FIG.

As is clear from the above description, according to the present invention, since the ignition means is provided in the high-pressure oxygen introduction pipe, its operation is reliable, and the ignition means is automatically and reliably operated as soon as gas is supplied. Since it is ignited, there is no need to worry about igniting it like in the past! Moreover, there is no fear that the ignition timing will be delayed and the area around the crater will be ignited with mixed gas, resulting in an explosion, making it extremely safe to use.

In addition, in the present invention, only one piezoelectric element is required3;
It is not only cheaper in terms of cost, but also simpler in structure, and even if a flashback occurs while the gas burner is in use, the flashback will not enter the high-pressure oxygen path but will instead enter the mixed gas path. , without damaging the piezoelectric element.

Furthermore, in the present invention, an arcuate taper surface with no corners is formed at the tip of the high-pressure oxygen jet nozzle, and an insulating gap retainer is protruded from the outer periphery, so that the high-pressure oxygen jet nozzle can be There is no risk that the oxygen ejection part of the nozzle will be accidentally eccentric within the gas ejection hole of the nozzle, and a constant gap is always maintained.As a result, discharge occurs at the tips of both nozzles through impact on the piezoelectric element. Not only can the mixed gas be ignited reliably, but also an ideal outer flame that completely surrounds the inner flame can be formed.

．． BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the entire structure, FIG. a and b are a vertical cross-sectional view and a side view of the stator;
Figures 4a, B, and c are longitudinal cross-sectional views and both side views of the impactor;
Figures a and b are longitudinal cross-sectional views and side views of the piezoelectric element holding cylinder, Figures 6 a and b are vertical cross-sectional views and side views of the piezoelectric element enclosing nut, and Figures 7 a and b are longitudinal cross-sectional views of the stopper. and side view, Figure 8a (5b
9a (5b) and 10a (5b are longitudinal sectional views and side views of the insulating cylinder;
Figures 1a and b are longitudinal cross-sectional views and side views of the insulator, Figure 12a (
5b is a vertical cross-sectional view and a side view of the piezoelectric element enclosing nut, the first
Figure 3 A. ! 1. 14b is a vertical cross-sectional view and a side view of the high-pressure oxygen jet nozzle, and FIG. 14 is a vertical cross-sectional view of the entire structure showing the operating state.

Claims (1)

[Claims] 1 A cylindrical body having a high-pressure oxygen introduction hole and a mixed gas introduction hole, a nozzle connected to this cylindrical body, a high-pressure oxygen introduction pipe provided within the cylinder, and a large diameter portion of the high-pressure oxygen introduction pipe. , a stator whose through hole is made of a magnetic material or a permanent magnet, and whose through hole is connected to the high pressure oxygen introduction hole, and the high pressure oxygen introduction tube is An impactor, a part of which is made of a permanent magnet or a magnetic material, moves in the axial direction within a large diameter portion, a piezoelectric element to which an impact is applied directly or indirectly by the impactor, and this piezoelectric element is held. a piezoelectric element holding cylinder whose cathode is electrically connected to the nozzle via the high pressure oxygen introduction pipe and the cylinder; and an anode of the piezoelectric element is electrically connected to the high pressure oxygen jetting nozzle. and a high-pressure oxygen jet nozzle connected to the conductive cylinder and having an insulating gap holder protruding from its outer periphery to maintain a constant gap with the nozzle. A crater.