JPS6049814B2 - crater - Google Patents

Description

[Detailed description of the invention] The present invention relates to a crater for an automatic machine.

Conventionally, lighters, matches, etc., have been used to ignite the vents of gas welders and fusers, but with these ignition methods, the match or other igniter may get wet with rain and become unable to ignite. There were problems in that it was very troublesome, causing burns, and it took a lot of time to search.
Therefore, in order to solve this problem, the present inventor first converted the pressure of high-pressure oxygen into an impact force, applied the impact force to the piezoelectric element to generate a high voltage, and connected the mixed gas jet nozzle and the high-pressure An invention of a crater that generates a spark between it and an oxygen ejection nozzle to ignite it, specifically, a cylindrical body having a high-pressure oxygen introduction hole and a mixed gas introduction hole, a nozzle connected to the cylindrical body, and the invention: A high-pressure oxygen introduction pipe provided in a cylinder, and a stator that is partially made of a magnetic material or a permanent magnet and is fixed to the large diameter part of the high-pressure oxygen introduction pipe with its through hole communicating with the high-pressure oxygen introduction hole. and an impactor, a portion of which is made of a permanent magnet or magnetic material, which moves in the axial direction within the large-diameter portion of the high-pressure oxygen introduction tube due to the pressing force of high-pressure gas from the through hole of the stator; one piezoelectric element to which an impact is directly or indirectly applied, and the piezoelectric element is held and its cathode is electrically connected to the nozzle via the high-pressure oxygen introduction pipe and the cylinder; a conductive tube that electrically connects the anode of the piezoelectric element to a high-pressure oxygen jet nozzle; An application was filed for the invention of a crater equipped with a high-pressure oxygen jet nozzle having an insulating gap holder protruding from the
No. 516) However, the present invention is a further development and improvement of the invention related to the earlier patent application.

That is, the present invention provides a cylindrical body having a high-pressure oxygen introduction hole and a mixed gas introduction hole, a cylindrical body coaxially connected and fixed to the cylindrical body,
an outer cylinder having a small-diameter opening on its front end surface; an inner cylinder connected and fixed to the cylinder with a mixed gas passage communicating with the mixed gas introduction hole formed in the outer cylinder; It is coaxially connected and fixed to this inner cylinder via an insulator, and its tip is provided slightly inward from the opening of the outer cylinder via an insulator, and the axial direction of the outer circumference of the tip is , a nozzle provided with a large number of slits communicating with the mixed gas passage, and a part of which is fixed to the nozzle side in the inner cylinder so that the through passage communicates with the high pressure oxygen introduction hole is a magnetic material or a permanent magnet. A piezoelectric element is provided through an insulator in a valve body having a stator and a passage for high-pressure oxygen, and a part of the cathode side of the piezoelectric element facing the stator is made of a permanent magnet or a magnetic material. The receiver is fixed, and a stopper is fixed to the anode side to form the whole structure, and is moved in the axial direction within the large diameter part of the inner cylinder by the pressing force of high pressure gas from the passage of the stator. A piezoelectric generating valve disposed as a conductor is connected and fixed to the nozzle so that its high-pressure oxygen passage communicates with the nozzle, and a receiving abutment is provided on the head thereof with which a stopper of the piezoelectric generating valve collides. 5. Features a configuration with a conductive cylinder.
However, with this configuration, the impact force of the piezoelectric generating valve is increased,
A high voltage is generated even by minute gas pressure, and thus,
It is designed to automatically ignite reliably and safely by opening the valve in the gas path and allowing the gas to flow.

Hereinafter, the present invention will be explained based on a preferred embodiment shown in the drawings.

Figure 1 is a longitudinal cross-sectional view of the entire structure, Figures 2 to 5 are longitudinal cross-sectional views and side views of the main components, and Figure 6 is a longitudinal cross-sectional view of the entire structure showing its operating state. It has a cylindrical body made of three metals, and has a collar 2 near the front end of its outer periphery, and truncated conical parts 3 and 4 at the rear of the collar 2. A high pressure oxygen introduction hole 5 is drilled,
In addition, three thin mixed gas introduction holes 7 are bored at equal intervals between the rear end surface of the truncated conical section 3 and the front end surface of the annular section 6 which is protruded from the front of the collar section 2. A large diameter screw hole 8 is bored from the annular portion 6 to a slightly rear end.

Reference numeral 9 denotes an outer cylinder made of metal such as brass, which has an opening (gas ejection hole) 10 with a smaller diameter than the inner diameter of any part on its front end surface;
A step part 11 is provided inside, and a collar part 12 is provided at the rear end opening edge. It is connected and fixed in a shape.

Note that in actual use, a nut (not shown) provided on the torch side is used.

), the cylinder body 1 and the outer cylinder 9 are fixed integrally by tightening the outer circumferences of their collar parts 2 and 12, which are in contact with each other. 13 is an inner cylinder made of metal such as brass,
As shown in FIGS. 2A and 2b, an opening 14 is provided on the front end surface, and inside the front half, a large diameter section 15 and a small diameter section 16 are provided in which a piezoelectric generating valve, which will be described later, is housed. ,
At the rear of this small diameter portion 16 is a screw hole 17, and this screw hole 1
A through passage 18 communicating with the inner cylinder 13 is bored, and a stepped portion 19 and a threaded portion 20 are provided on the outer periphery of the front end, and a threaded portion 21 is provided on the outer periphery of the rear end. 21 is screwed into the screw hole 8 of the cylinder body 1 to communicate the high pressure oxygen introduction hole 5 and the through passage 18, and the mixed gas introduction hole of the cylinder body 1 is connected between the inner circumferential surface of the outer cylinder 9 and A mixed gas passage 22 communicating with the outer cylinder 9 is provided in the outer cylinder 9 .

Reference numeral 23 denotes a nozzle made of metal such as brass, and as shown in FIGS. 3A and 3B, a number of concave slits 24 are formed at equal intervals in the axial direction on the outer circumference of the tip, and a number of concave slits 24 are formed in the axial direction of the outer circumference of the tip. , a high-pressure oxygen jet hole 25 and a partially screwed hole 2 communicating therewith.
6 is bored, and the tip of this nozzle 23 is connected to the outer cylinder 9.
It is located slightly inward from the opening 10 of the cylinder 10, and is coaxially connected and fixed to the inner cylinder 13 via an insulator, which will be described later.

Reference numeral 27 denotes an insulator such as ceramic which is interposed in the gap between the tip of the nozzle 23 and the outer tube 9, and the front end surface which protrudes beyond the tip of the nozzle 23 is engaged with the inner step 11 of the outer tube 9. The mixed gas passage between the outer cylinder 9 and the nozzle 23, which is integrated with the mixed gas passage 22, is fixed at its rear end so that its inner circumferential surface is located on the same plane as the inner circumferential surface of the opening 10. 22 and the slit 24 portion of the nozzle 23 are provided in communication with each other. A stator 28 is partially made of a magnetic material or a permanent magnet, and this stator 28 is bored in the direction of its central axis by screwing a small diameter screw portion 29 at the rear end into the screw hole 17 of the inner cylinder 13. The through passage 30 and the through passage 18 of the inner cylinder 13 are communicated with each other, and the front end portion, which has approximately the same diameter as the inner diameter of the small diameter portion 16 of the inner cylinder 13, is closely fixed to the inner peripheral surface of the small diameter portion 16.

31 is arranged in a space formed by the large diameter part 15 and small diameter part 16 of the inner cylinder 13, and moves in the space in the axial direction by the pressing force of high pressure oxygen ejected from the through passage 30 of the stator 28. This piezoelectric generating valve 31 is shown in FIG. 4A,
As shown in b and c,? It consists of a body, a piezoelectric element, an insulator, a receiver, and a stopper.

That is, the entire valve body 32 consists of a large diameter part and a small diameter part, and four high-pressure oxygen passages 33 are bored at equal intervals in the axial direction of the circumference of the large diameter part, and a screw hole 34 is formed in the small diameter part. A piezoelectric element storage space 35 is provided in communication with the screw hole 34 from a part of the small diameter part to the large diameter part, and furthermore, a small diameter space 35 is provided in the center of the front end surface of the large diameter part. opening 3
6 is provided.

In the cavity 35 of this valve body 32, an opening 36 is provided.
A cylindrical piezoelectric element 38 with a cathode (1) formed on the rear end of one end surface and an anode (+) formed on the other end surface (front end) is connected through an insulator 37 made of ceramic etc. The opening 3 of the valve body 32 is provided on the anode side of the piezoelectric element 38 and is insulated by the small diameter portion of the insulator 37.
A stopper 39 is fixedly provided with the tip slightly protruding from the piezoelectric element 38, and on the cathode side of the piezoelectric element 38, a supporter 40 having a permanent magnet 41 fitted to a part of the rear end surface is attached to the outer periphery of the supporter 40. While threading the threaded portion 42 and the threaded hole 34 of the valve body 32,
The small diameter protrusion 43 provided at the center of the front end surface is connected to the insulator 37.
It is provided in pressure contact with the cathode side end surface of the piezoelectric element 38 from the opening thereof.

Since the piezoelectric element 38 is thus held between the stopper 39 and the protrusion 43 of the screwed holder 40 and receives a compressive force, a minute gas is released due to the interaction with the strong impact force described later. Some have the mutual effect of being able to generate high-voltage electricity even when the voltage is low.

44 is a conductive tube connected and fixed to the nozzle 23, and as shown in FIGS.
A receiving projection 46 against which the stopper 39 of the piezoelectric generating valve 31 collides is provided, and? A threaded portion 47 is provided on the outer periphery of the front end of the small diameter portion connected to the flange portion 45, and the outer peripheral end surface portion of the receiving projection 46 communicates with a high-pressure oxygen passage 48 bored in the direction of the central axis. A slit 49 is formed in a cross shape,
This conductive cylinder 44 is constructed by screwing a threaded part 47 into a threaded hole 26 of the nozzle 23 through a central cylinder part 51 of an insulator 50 made of ceramic or the like, which is provided in a butt state against the rear end surface of the nozzle 23. , the high-pressure oxygen jet hole 25 of the nozzle 23 and the through passage 48 are communicated and connected, and an insulator made of ceramic or the like is provided between the rear end surface of the cylindrical part 51 of the insulator 50 and the collar part 45 of the conductive cylinder 44. An insulator 53 such as ceramic is interposed between the body 52 and the rear end surface of the tooth portion 45 of the conductive cylinder 44 and the opening 14 of the inner cylinder 13.
A cap nut 54 is screwed onto the threaded portion 20 of No. 3 with its end surface butting against the stepped portion 19, and the conductive cylinder 44 and the nozzle are connected to each other through the tightening of each insulator 50, 51, 52, 53 by the cap nut 54. 23 is fixed to the inner cylinder 13 in an electrically insulated manner.

Next, to explain the operation of the present invention according to the above configuration, this crater is used by attaching the cylindrical body 1 side to a torch (not shown), and the gas burner valve is closed and gas is not supplied. The state shown in FIG. 1, that is, stator 2
8 and the piezoelectric generating valve 31 are attracted by the attraction action of the permanent magnet 41 of the receiver 40, and the through passage 30 communicating with the through passage 18 from the high pressure oxygen introduction hole 5 is closed by the piezoelectric generating valve 31. When the valve of the gas burner is first opened and mixed gas is supplied from the state, this mixed gas flows from the mixed gas introduction hole 7 of the cylinder 1 to the mixed gas passage 22 and the nozzle 23.
The liquid is ejected from the opening 10 of the outer cylinder 9 through the tip slit 24 .

Subsequently, when high-pressure oxygen is supplied, it passes through the high-pressure oxygen introduction hole 5 of the cylinder body 1, the through-path 18 of the inner cylinder 13, and then the through-path 30 of the stator 28, and the holder 4-0 of the piezoelectric generating valve 31 and the permanent magnet 4.
Pressure due to high pressure oxygen gas is applied to the end face of 1.

Then, as shown in FIG. 6, the piezoelectric generating valve 31 is moved forward by the pressing force of the high-pressure oxygen gas, and its stopper 39 is caused to collide with the receiving abutment 46 of the conductive cylinder 44, causing it to At the same time as the piezoelectric element 38 collides with the piezoelectric element 38, the high pressure oxygen from the through passage 30 passes through the through passage 33 of the piezoelectric generation valve 31, the slit 49 of the conductive tube 44, the through passage 48, and the high pressure oxygen introduction hole 25 of the nozzle 23, and then exits. It is ejected to the outside from the opening 10 of the cylinder 9.

On the other hand, at the same time as the high-pressure oxygen is ejected to the outside, a high voltage is generated in the piezoelectric element 38 due to the impact received from the stopper 39 of the piezoelectric generating valve 31 that collided with the receiving abutment 46 of the conductive cylinder 44 .

In this case, since the piezoelectric element 38 is provided in the valve body 32 by being clamped between the stopper 39 and the protrusion 43 of the receiver 40, the compressive force on the piezoelectric element 38 and the piezoelectric generation Due to the interaction with the strength of the impact force due to the weight of the entire valve 31, a high voltage is generated in the piezoelectric element 38 even when the gas pressure is minute.

Therefore, the nozzle 2 is electrically connected to the anode (+) of the piezoelectric element 38 via the conductive tube 44 that is in contact with the metal 39.
A discharge occurs between the tip point A of the piezoelectric element 38 and the inner peripheral surface point B of the tip opening 10 of the outer cylinder 9, which is electrically connected to the cathode (-) of the piezoelectric element 38. The mixed gas passing through the mixed gas passage 22, the slit 24 of the nozzle 23, and the opening 10 is ignited.

In this case, the discharge occurs at the tip of the nozzle 23 (
As a result of the contact between point A) and the opening 10 of the outer cylinder 9 (point B), ignition of the mixed gas is ensured. After ignition by discharge, the piezoelectric generator valve 3.1
The collision state shown in FIG. 6 is maintained under the pressure of high-pressure oxygen that is sequentially supplied to the cylinders, 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 piezoelectric generator valve 31 is eliminated, so the piezoelectric generator valve 31 is attracted to the stator 28 by the attraction action of the permanent magnet 41. It is adsorbed and returns to its original state as shown in FIG.

As is clear from the above detailed description, according to the present invention, since the piezoelectric generating valve and the like serving as the ignition means are disposed within the inner cylinder,
You can not only ignite the ignition reliably, quickly, and extremely safely by simply opening the valve in the gas path with a simple one-touch operation, without using a lighter or matches like in the past. Since the piezoelectric element, which is the main part of the device, is housed within the valve body, there is almost no thermal effect on the piezoelectric element even if the ambient temperature rises, so there is no damage even if a backfire occurs. , durability) and can be used for a long period of time.

Furthermore, in the present invention, since the piezoelectric generating valve itself which is assembled by applying compressive force to the piezoelectric element is caused to collide with the pressing force of oxygen gas, even if the gas pressure is small, the piezoelectric element An extremely high voltage is generated due to the interaction of the compressive force against the piezoelectric valve and the strength of the impact force due to the piezoelectric generating valve's own weight, and as a result, discharge occurs at the outer cylinder opening and the tip of the nozzle, resulting in a discharge to the mixed gas. ignition can be carried out reliably.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the whole, FIG. 2 a (5b is a longitudinal cross-sectional view and a side view of the inner cylinder,
Figure 3a (5b is a vertical cross-sectional view and side view of the nozzle, Figure 4a
(5b, c are vertical cross-sectional views and side views of the piezoelectric generating valve, Fig. 5a
and b are a vertical cross-sectional view and a side view of the conductive tube, and FIG. 6 is a vertical cross-sectional view of the entire structure showing the operating state. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 5... High pressure oxygen introduction hole, 7... Mixed gas introduction hole, 9... Outer cylinder, 10... Small diameter opening, 1
3...Inner cylinder, 15, 16...Piezoelectric element storage space, 1
8... Through passage, 22... Mixed gas passage, 23...
Nozzle, 24...Slit, 25...High pressure oxygen jet hole, 27...Insulator, 28...Stator, 30...Through passage, 31...Piezoelectric generation valve, 32...Valve body, 33・
... Penetration path, 37 ... Insulator, 38 ... Piezoelectric element,
39... Money received, 40... Money received, 44... Conductive tube,
46... Receptacle, 48... Penetration path, 49... Slit.

Claims (1)

[Claims] 1 A cylinder having a high-pressure oxygen introduction hole and a mixed gas introduction hole, an outer cylinder coaxially connected and fixed to this cylinder and having a small-diameter opening on its front end surface, and an outer cylinder having a small diameter opening in its front end surface. , an inner cylinder formed with a mixed gas passage communicating with the mixed gas introduction hole and connected and fixed to the cylindrical body; and an inner cylinder coaxially connected and fixed to the inner cylinder via an insulator, and a distal end thereof is connected and fixed to the cylinder body. A nozzle is provided slightly inwardly from the opening of the outer cylinder through an insulator, and has a number of slits connected to the mixed gas passage in the axial direction on the outer periphery of the tip, and a nozzle is provided inside the inner cylinder. A stator, a part of which is made of a magnetic material or a permanent magnet, is fixed to the nozzle side with its through passage communicating with the high-pressure oxygen introduction hole, and a piezoelectric element is connected to the valve body, which has a through-path for high-pressure oxygen, through an insulator. A piezoelectric element is provided, and a receiver partially made of a permanent magnet or a magnetic material is fixed to the cathode side of the piezoelectric element facing the stator, and a metal is fixed to the anode side of the piezoelectric element. , and a piezoelectric generating valve disposed to be movable in the axial direction within the large diameter portion of the inner cylinder by the pressing force of high pressure gas from the through passage of the stator, and the high pressure oxygen passage are connected to 1. A crater comprising: a conductive cylinder connected and fixed to a nozzle and having a receiving protrusion provided on the head thereof with which a stopper of the piezoelectric generating valve collides.