WO2019174451A1

WO2019174451A1 - Cutting nozzle

Info

Publication number: WO2019174451A1
Application number: PCT/CN2019/075877
Authority: WO
Inventors: 徐慕庆
Original assignee: 徐慕庆
Priority date: 2018-03-16
Filing date: 2019-02-22
Publication date: 2019-09-19
Also published as: CN207936077U

Abstract

Disclosed is a cutting nozzle, comprising a nozzle core (31) and a nozzle cap (32) sheathed around the nozzle core (31), wherein the nozzle core (31) comprises a nozzle cap connecting screw thread (33), a metal pipe (37), an insulating pipe (34) and an oxygen outlet nozzle (35), which are sequentially connected; the nozzle cap (32) is sheathed around the nozzle core (31) and is in threaded connection with the nozzle cap connecting screw thread (33); a gap between the nozzle cap (32) and the nozzle core (31) is a mixed gas outlet; the nozzle cap connecting screw thread (33) comprises a high-pressure oxygen outlet hole, the metal pipe (37) is in communication with the high-pressure oxygen outlet hole, the insulating pipe (34) is inserted into the metal pipe (37), and one end of the oxygen outlet nozzle (35) is inserted into the insulating pipe (34); and an outlet at a front end of the nozzle cap (32) is provided with a metal ring (321), an insulating ring (322) is arranged on the inner side of the metal ring (321), a hole of the insulating ring (322) is a mixed gas outlet hole, and an area between the metal ring (321) and a front end of the oxygen outlet nozzle (35) is a pulse ignition discharge zone. By increasing the hole diameter of the mixed gas outlet hole and arranging the insulating ring (322) in the hole, the shortest distance from the front end of the oxygen outlet nozzle (35) to the metal ring (321) at the front end of the nozzle cap (32) is increased, and the pulse ignition efficiency is improved.

Description

Cutting nozzle

Technical field

The utility model relates to a cutting torch cutting nozzle, in particular to a cutting nozzle.

Background technique

Conventional torches are usually ignited by an external source of ignition during ignition, such as a light source such as a lighter or a match, thereby causing burns to the ignition personnel during ignition, and when operating outdoors, due to the large wind, It is difficult to catch fire. When working at height, holding a torch in one hand and igniting it in one hand can also cause people or items to fall, or when they are working in a special place, they cannot enter with a fire source such as a lighter, resulting in problems such as inoperability.

However, the pulse ignition area is between the front end of the oxygen outlet nozzle and the front end of the nozzle of the existing pulse auto-ignition torch, and in the pulse ignition, if the ignition distance between the two electrodes is too small, the pulse discharge frequency and the number of sparks will be caused. If the pulse discharge is not possible in the past, the distance between the front end of the conventional oxygen outlet nozzle and the front end of the nozzle cap is fixed, and the distance is small. The effect of using pulse ignition is poor, and the efficiency is low, and the front end of the mouth cap is The pore size of the mixed gas outlet hole is standard and difficult to change, otherwise it will affect the flame spray effect.

The end of the nozzle of the existing pulse auto-ignition torch is inserted into the insulating tube to adopt a tapered structure to insert the wire for electrical connection. In actual use, the high-pressure oxygen will affect the wire and cause the wire to oscillate. It is easy to make poor contact between the wire and the outlet nozzle, resulting in failure to ignite.

The cutting nozzle for the automatic internal ignition torch is to insulate the outlet nozzle from the torch body, that is, to provide an insulating tube between the outlet nozzle and the mouthpiece connecting thread, and the insulating tube The connection between the threaded joint and the outlet nozzle of the mouth cap is poorly sealed, and it is easy to cause air leakage.

Utility model content

It is an object of the present invention to provide a cutting tip that addresses one or more of the above prior art problems.

According to an aspect of the present invention, a cutting nozzle includes a nozzle core and a nozzle cap sleeved on the nozzle core, and the nozzle core includes a nozzle cap connecting thread, a metal tube, an insulating tube and an oxygen outlet nozzle; The cap connecting thread comprises a high-pressure oxygen outlet hole, the metal tube is connected with the high-pressure oxygen outlet hole, the insulating tube is inserted in the metal tube, and one end of the oxygen outlet nozzle is inserted in the insulating tube; a metal ring and a metal ring are arranged at the front end of the nozzle cap. The inner side is provided with an insulating ring, the hole of the insulating ring is a mixed air outlet hole, and the area between the metal ring and the front end of the oxygen outlet nozzle is a pulse ignition discharge area.

The utility model increases the aperture of the mixed gas outlet hole of the front end of the conventional cutting nozzle cap, and provides an insulating ring in the hole, thereby increasing the shortest distance of the metal ring from the front end of the oxygen nozzle to the front end of the nozzle cap, and the pulse The ignition distance is adjusted to a preferred distance, and the hole in the middle of the insulating ring is used as a new mixed gas outlet hole, which does not change the original mixed gas outlet hole size, and can improve the pulse ignition effect and the ignition efficiency.

In some embodiments, a first insulating tube body is disposed near the front end of the nozzle cap, a second insulating tube body is disposed on the oxygen outlet nozzle sleeve, and the second insulating tube body is connected to the insulating tube, and the first insulating tube body is sleeved. In the outlet nozzle, a first port of the mixed gas is connected between the first insulating tube body and the oxygen outlet nozzle, and a rear end of the first insulating tube body is sleeved on the front end of the second insulating tube body, the first insulating tube body and the second insulating layer A second port of the mixed gas is arranged between the pipe bodies, and the first port of the mixed gas communicates with the second port of the mixed gas; the outlet of the gas is not covered by the second insulating pipe body and passes through the second port of the mixed gas to the mouth cap The shortest distance of the inner wall is greater than the shortest distance from the front end of the nozzle to the metal ring. Due to the pulse ignition, the two electrodes will discharge and ignite at the shortest distance. This arrangement ensures that the shortest distance between the nozzle and the mouthpiece is the shortest distance between the front end of the nozzle and the metal ring at the front end of the mouthpiece.

In some embodiments, a conductive tube is disposed in the insulating tube, and the conductive tube is connected to the oxygen outlet nozzle. Therefore, when the wire is inserted into the insulating tube and electrically connected to the outlet nozzle, the electric shock end of the wire is in the conductive tube, and the conductive tube is connected with the outlet nozzle, which can increase the electrical contact range between the oxygen outlet and the wire, when the high pressure oxygen When the wire is oscillated, the wire will not be separated from the outlet nozzle or the conductive tube, and a stable electrical connection between the wire and the outlet nozzle can be maintained, which can ensure stable pulse ignition, and the cutting nozzle is a wearing part. Easy to replace.

In some embodiments, the metal tube is connected to the mouthpiece connecting thread by integral molding, welding or bolting. Thereby, the connection sealing property with the nozzle cap connecting thread is improved, the air leakage is prevented, and the phenomenon that the connection between the conventional insulating tube and the nozzle cap connecting thread is insufficiently sealed and the air leaks is greatly reduced.

In some embodiments: the insulating tube is a ceramic tube, a mica tube, or an insulating plastic tube. Therefore, the insulation function can be insulated, and the oxygen outlet nozzle and the nozzle cap connecting thread can be insulated, that is, the oxygen outlet nozzle and the torch body are insulated from each other, and the oxygen outlet nozzle and the mouth nozzle can be made. Pulse ignition is performed between.

In some embodiments, the inner wall of one end of the metal tube and the insulating tube is circumferentially provided with a concave ring, and the concave ring forms a sealed cavity with the outer wall of the insulating tube, and the sealing chamber is filled with glue. Thereby, it is possible to prevent the insulating tube and the oxygen outlet from being blown out by the high-pressure oxygen, and to improve the sealing property between the insulating tube and the metal tube.

In some embodiments, the oxygen outlet nozzle is inserted into the insulating tube, and one end of the oxygen outlet nozzle inserted into the insulating tube has a tapered shape and a concave portion is formed with the inner wall of the insulating tube. Therefore, when the wire is inserted into the mouth core, it is inserted into the concave portion along the tapered surface of the outlet end of the oxygen outlet nozzle, and is touched with the oxygen outlet nozzle, so that the electrode of the direct current discharge device is electrically connected to the oxygen outlet through the wire. mouth.

DRAWINGS

1 is a schematic structural view of a cutting nozzle of the present invention;

2 is a schematic structural view of a cutting nozzle assembled to a torch body according to the present invention;

3 is a schematic structural view of a first embodiment of a wire of a cutting tip penetrating into an oxygen tube according to the present invention;

4 is a schematic view showing the structure of a second embodiment of the wire of the cutting nozzle penetrating into the oxygen tube of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

It should be noted that the "front end" and "rear end" used below mean that the end of the cutting nozzle connected to the torch body is the rear; the end of the cutting nozzle having the high pressure oxygen or the mixed gas outlet is the front.

As shown in FIG. 1 , a cutting nozzle includes a nozzle core 31 and a nozzle cap 32 sleeved on the nozzle core 31. The nozzle core 31 includes a nozzle cap connecting thread 33, a metal tube 37, an insulating tube 34 and a ring. The oxygen nozzle 35, the mouth cap 32 is sleeved on the mouth core 31 and is screwed to the mouthpiece connecting thread 33. The mouth cap 32 and the mouth core 31 have a gap, which is a mixed gas outlet, and the mouthpiece connecting thread 33 includes a high voltage. The oxygen outlet hole, the metal pipe 37 is connected to the high-pressure oxygen outlet hole. Specifically, the metal pipe 37 and the nozzle cap connection thread 33 can be sealed and connected by integral molding, welding or bolting. In this embodiment, the metal pipe The connection between the 37 and the mouthpiece connecting thread 33 can be integrally formed, thereby improving the connection sealing property with the nozzle cap connecting thread, preventing leakage, and greatly reducing the connection between the conventional insulating tube and the mouth cap. The connection between the threads is not sealed enough to leak. The insulating tube 34 is inserted into the metal tube 37, and one end of the oxygen generating nozzle 35 is inserted into the insulating tube 34. Thus, by providing an insulating tube, the oxygen outlet nozzle and the mouth cap are insulated, that is, the oxygen outlet nozzle and the mouth cap are insulated, and serve as an electrode of the DC discharge device; and the nozzle cap is used as a DC discharge device. The other electrode enables discharge between the oxygen outlet nozzle and the mouth cap, and an electric spark is applied to ignite.

A metal ring 321 is disposed at the front end of the mouth cap 32. The metal ring 321 is integrally formed with the front end of the mouth cap 32. The material of the metal ring 321 is the same as that of the nozzle cap 32, and may be made of copper or an alloy material. The inner side of the metal ring 321 is provided with an insulating ring 322. The insulating ring 322 and the metal ring 321 can be adhesively connected. The hole of the insulating ring 322 is a mixed air outlet hole, and the area between the metal ring 321 and the front end of the oxygen outlet nozzle 35 is Pulse ignition discharge zone. Therefore, by increasing the diameter of the gas mixture outlet hole at the front end of the conventional cutting nozzle cap and providing an insulating ring in the hole, the shortest distance from the front end of the nozzle to the metal ring at the front end of the nozzle can be increased, and the pulse is increased. The ignition distance is adjusted to a preferred distance, and the hole in the middle of the insulating ring is used as a new mixed gas outlet hole, which does not change the original mixed gas outlet hole size, and can improve the pulse ignition effect and the ignition efficiency.

The first insulating tube body 323 is integrally formed with the insulating ring 322, and the first insulating tube body 323 and the mouth cap 32 may be coated with the first insulating tube body 323. glue. The outlet 35 is sleeved with a second insulating tube 324. The length of the second insulating tube 324 is shorter than the length of the outlet nozzle 35, that is, the outlet nozzle 35 is not covered by the second insulating tube 324 near the front end. The second insulating tube body 324 and the insulating tube 34 may be integrally formed or glued. The first insulating tube body 323 is sleeved on the oxygen outlet nozzle 35. The first insulating tube body 323 and the oxygen outlet nozzle 35 have a gap and are mixed. The gas first port 325, the rear end of the first insulating tube body 323 is sleeved on the front end of the second insulating tube body 324. Specifically, the rear end of the first insulating tube body 323 and the front end of the second insulating tube body 324 are tapered. The structure has a gap between the first insulating tube body 323 and the second insulating tube body 324 and is a mixed gas second port 326, and the first gas inlet port 325 communicates with the mixed gas second port 326; the oxygen outlet nozzle 35 The shortest distance from the second insulating port 324 to the inner wall of the mouth cap 32 through the second port 326 of the mixture is greater than the shortest distance from the front end of the nozzle 35 around the insulating ring 322 to the ring 321 . Due to the pulse ignition, the two electrodes will discharge and ignite at the shortest distance. This arrangement ensures that the shortest distance between the nozzle and the mouthpiece is the shortest distance between the front end of the nozzle and the metal ring at the front end of the mouthpiece.

A conductive tube 341 is embedded in the insulating tube 34. The conductive tube 341 can be made of metal copper, and the conductive tube 341 is integrally formed with the oxygen outlet nozzle 35. Therefore, when the wire is inserted into the insulating tube and electrically connected to the outlet nozzle, the electric shock end of the wire is in the conductive tube, and the conductive tube is connected with the outlet nozzle, which can increase the electrical contact range between the oxygen outlet and the wire, when the high pressure oxygen When the wire is oscillated, the wire is not separated from the outlet nozzle or the conductive tube, and a stable electrical connection between the wire and the outlet nozzle can be maintained, and stable pulse ignition can be ensured.

It should be noted that the above cutting nozzle can be used not only for a cutting torch or a welding torch, but also for a flame cutting machine and a gantry type tube plate integrated cutting machine. The cutting nozzle can also be made into a plum blossom mouth, a ring mouth, a quick mouth, a machine mouth and a split type cutting nozzle.

The insulating tube 34, the insulating ring 322, the first insulating tube 323 and the second insulating tube 324 are ceramic tubes, mica tubes or insulating plastic tubes. In this embodiment, the insulating tubes 34 and the insulating rings 322 are first. The insulating tube body 323 and the second insulating tube body 324 are both ceramic tubes, that is, ceramics. Further, the insulating tubes 34 may be long-length insulating tubes or short-length annular insulating gaskets. In addition, it can also be an asbestos tube, which can achieve the effects of high temperature resistance and insulation. It should be noted that other insulating tubes made of high temperature resistant and insulating materials are also within the scope of the present application. Therefore, the insulation function can be insulated, and the oxygen outlet nozzle and the nozzle cap connecting thread can be insulated, that is, the oxygen outlet nozzle and the torch body are insulated from each other, and the oxygen outlet nozzle and the mouth nozzle can be made. Pulse ignition is performed between the two, so that the ignition can avoid the burn hazard to the operator, and it can still be smoothly ignited in the case of strong wind outside.

Further, one end of the oxygen outlet nozzle 35 is inserted into the insulating tube 34, and one end of the oxygen outlet nozzle 35 inserted into the insulating tube 34 has a tapered shape, and a concave portion 36 is formed with the inner wall of the insulating tube 34. Therefore, when the wire is inserted into the mouth core, it is inserted into the concave portion along the tapered surface of the outlet end of the oxygen outlet nozzle, and is touched with the oxygen outlet nozzle, so that the electrode of the direct current discharge device is electrically connected to the oxygen outlet through the wire. mouth.

In addition, the inner wall of one end of the metal tube 37 connected to the insulating tube 34 is integrally formed with a concave ring, and a sealing cavity 38 is formed between the concave ring and the outer wall of the insulating tube 34, and the sealing cavity 38 is filled with glue for sealing. Therefore, when the wire is inserted into the mouth core, it is inserted into the concave portion along the tapered surface of the outlet end of the oxygen outlet nozzle, and is touched with the oxygen outlet nozzle, so that the electrode of the direct current discharge device is electrically connected to the oxygen outlet through the wire. mouth.

As shown in FIG. 2, in actual use, the mouthpiece connecting screw 33 is screwed to the torch body 1, and the DC discharge device 2 is disposed in the torch body 1. The torch body 1, the mouth cap 32, the mouth cap connecting screw 33 and the oxygen outlet nozzle 35 are all made of a metal material and can be electrically conductive. One electrode of the DC discharge device 2 is electrically connected to the oxygen outlet nozzle 35, and the other electrode is electrically connected to the nozzle cap 32. An electric spark can be generated between the nozzle cap 32 and the oxygen outlet nozzle 35. The resulting spark can ignite the torch.

The torch body 1 may include a handle 11 , and the DC discharge device 2 is fixedly mounted in the handle 11 . In this embodiment, the DC discharge device 2 may include a battery and a circuit board. The positive and negative poles of the battery are electrically connected to the circuit board respectively, and then the positive pole and the negative pole are taken out from the circuit board, and the negative pole of the circuit board may be electrically connected to the torch body 1 And close to the handle 11, since the torch body 1, the nozzle cap connecting screw 33 and the mouth cap 32 are made of metal and can be electrically connected to each other, the mouth cap 32 is electrically connected to the negative pole of the circuit board, that is, The mouth cap 32 serves as a negative electrode of the direct current discharge device 2.

The DC discharge device 2 may further include a wire 21, one end of which may be connected to the positive electrode of the DC discharge device 2, that is, the positive electrode connected to the circuit board, and the other end of the wire 21 may be connected to the oxygen outlet nozzle 35, thereby the oxygen outlet nozzle 35 As the positive electrode of the direct current discharge device 2, it is only necessary to turn on the line of the direct current discharge device 2 to generate an electric spark between the discharge nozzle 35 and the nozzle cap 32 for ignition. The DC discharge device 2 may further include a switch 22 for controlling the on/off of the line. The switch 22 may be disposed at the positive pole of the DC discharge device 2, and the switch 22 may be a jog switch.

The handle 11 can be provided with a fourth through hole 12 for the wire 21 to pass through. The torch body 1 can further include an oxygen tube 13 and a confluence head 14. One end of the oxygen tube 13 communicates with the confluence head 14, and the handle 11 is located at the oxygen tube 13 One end; the cutting nozzle 3 is connected to the merging head 14, that is, the mouthpiece connecting thread 33 is screwed to the turning head 13. In order to enable the wire 21 to be electrically connected to the oxygen outlet nozzle 35, the wire 21 passes through the fourth perforation 12 of the handle 11 and then sequentially penetrates into the oxygen tube 13, the confluence head 14 and the cutting nozzle 3 and is connected to the outlet nozzle 3. Oxygen nozzle 35.

Among them, in order to allow the wire 21 to penetrate into the oxygen tube 13. As shown in FIG. 3, the wall of the oxygen tube 13 may be provided with a first through hole 131 through which the wire 21 is bored. The first through hole 131 is provided with a sealing device, and the sealing device can seal the first through hole 131 to prevent It leaked.

In the second embodiment, as shown in FIG. 4, the torch body 1 may further include an oxygen valve 15 between the handle 11 and the oxygen tube 13, and the side wall of the oxygen valve 15 is integrally formed with a thickening portion 16, a thickening portion. A third through hole 17 through which the wire 21 is bored may be opened in the 16th. One end of the third through hole 17 communicates with one end of the oxygen valve 15 near the oxygen tube 13, and the other end of the third through hole 17 is provided with the wire 21 penetrating and provided with a sealing device. The sealing device can seal the third perforation 17 to prevent it from leaking. Thus, the wire 21 passes through the fourth perforation 12 of the handle 11 and then penetrates into the third perforation 17 and enters the oxygen tube 13 across the oxygen valve 15. The oxygen tube 13, the confluence head 14 and the cutting nozzle 3 are all in communication. Therefore, after entering the oxygen tube 13, the lead wire 21 can directly penetrate into the oxygen outlet nozzle 35 in the cutting nozzle 3, and is connected to the oxygen outlet nozzle 35. The oxygen outlet 35 is used as the positive electrode of the direct current discharge device 2.

The sealing device may include a hole wall 41, a rubber pad 42 and a nut 43. The hole wall 41 is a tubular structure with two ends open. In the first embodiment, one end of the hole wall 41 is open and welded to the first through hole 131. In the second embodiment described above, one end of the hole wall 41 is openly welded to the third through hole 17. The outer side wall of the hole wall 41 is integrally formed with a threaded portion, the nut 43 is screwed to the hole wall 41, and the rubber pad 42 is disposed at the end of the hole wall 41. In the embodiment, the rubber pad 42 is plugged at the end of the hole wall 41. In the opening, the rubber pad 42 is provided with a second through hole 44 through which the wire 21 is bored, and one end of the nut 43 is provided with an annular retaining ring 45 for pressing the rubber pad 42 against the hole wall 41. When the nut 43 is screwed to the hole wall 41, the rubber pad 42 is pressed against the hole wall 41 by the annular retaining ring 45 to seal the opening of the hole wall 41. Further, the second through hole 44 is also pressed by the annular ring 45. The gap between the second through hole 44 and the wire 21 is pressed to perform sealing.

The above description is only one embodiment of the present invention, and it should be noted that those skilled in the art can make similar deformations and improvements related to several models without departing from the concept of the present invention. These should also be considered as protection within the scope of the present invention.

Claims

A cutting nozzle, comprising: a mouth core (31) and a mouth cap (32) sleeved on the mouth core (31), the mouth core (31) comprising a mouthpiece connecting thread thread connected in sequence ( 33) a metal tube (37), an insulating tube (34), and an oxygen outlet nozzle (35); the mouthpiece connecting thread (33) includes a high pressure oxygen outlet hole, the metal tube (37) and the high pressure The oxygen outlet hole is connected, the insulating tube (34) is inserted into the metal tube (37), and one end of the oxygen outlet nozzle (35) is inserted into the insulating tube (34); 32) A metal ring (321) is disposed at the front end of the metal ring (321), and an insulating ring (322) is disposed inside the metal ring (321), and the hole of the insulating ring (322) is a mixed gas outlet hole, and the metal ring (321) The area between the front end of the oxygen outlet nozzle (35) is a pulse ignition discharge zone.
A cutting nozzle according to claim 1, wherein a first insulating tube body (323) is disposed inside the mouth cap (32) near the front end, and the oxygen outlet nozzle (35) is sleeved. a second insulating tube body (324), the second insulating tube body (324) is connected to the insulating tube (34), and the first insulating tube body (323) is sleeved on the oxygen outlet nozzle (35) a first gas inlet port (325) between the first insulating tube body (323) and the gas outlet nozzle (35), and a rear end of the first insulating tube body (323) is sleeved on the a front end of the second insulating tube body (324), a second gas inlet port (326) is disposed between the first insulating tube body (323) and the second insulating tube body (324), and the first gas mixture is connected. a port (325) communicating with the second port (326) of the mixture; the outlet (35) is not covered by the second insulating tube (324) through the second port of the mixed gas ( 326) The shortest distance to the inner wall of the mouth cap (32) is greater than the shortest distance from the front end of the oxygen outlet nozzle (35) around the insulating ring (322) to the metal ring (321).
A cutting nozzle according to claim 1, wherein a conductive tube (341) is disposed in the insulating tube (34), and the conductive tube (341) is connected to the oxygen outlet nozzle (35).
A cutting nozzle according to claim 1, characterized in that the metal tube (37) and the mouthpiece connecting thread (33) are sealingly connected by integral molding, welding or bolting.
A cutting nozzle according to claim 1, wherein said insulating tube (34) is made of a ceramic tube, a mica tube or a plastic tube.
A cutting nozzle according to claim 1, wherein an inner wall of one end of the metal tube (37) and the insulating tube (34) is circumferentially provided with a concave ring, the concave ring and the insulating tube ( 34) A sealing chamber (38) is formed between the outer walls, and the sealing chamber (38) is filled with glue.
A cutting nozzle according to claim 1, wherein said oxygen outlet nozzle (35) is inserted into said insulating tube (34), and said oxygen outlet nozzle (35) is inserted into said insulating tube (34). The inner end has a tapered shape and forms a recess (36) with the inner wall of the insulating tube (34).