WO2020155234A1

WO2020155234A1 - Automatic ignition device

Info

Publication number: WO2020155234A1
Application number: PCT/CN2019/075866
Authority: WO
Inventors: 徐慕庆
Original assignee: 徐慕庆
Priority date: 2019-01-30
Filing date: 2019-02-22
Publication date: 2020-08-06
Also published as: CN109631080B; CN109631080A

Abstract

An automatic ignition device, comprising a weld-cutting nozzle (1) and an insulation sleeve (2) fitted over the weld-cutting nozzle (1). The weld-cutting nozzle (1) is a first electrode; a conductor (201) is provided in the insulation sleeve (2); the conductor (201) is a second electrode matching the first electrode; the conductor (201) and the weld-cutting nozzle (1) are capable of igniting at a fire exit of the weld-cutting nozzle (1). Therefore, the weld-cutting nozzle (1) is not required to be modified; the structure is simple; the production costs are low and the replacement is convenient; the insulation sleeve (2) is able to protect the weld-cutting nozzle (1) from being directly heated by high temperature flames, and the service life is prolonged.

Description

Automatic ignition device

Technical field

The invention relates to an ignition device of a welding torch or a cutting torch, in particular to an automatic ignition device.

Background technique

Traditional welding torches or cutting torches are usually ignited by an external fire source, such as a lighter or a match, which may cause burns to the ignitor when igniting, and when operating outdoors, the wind is relatively high. Large, difficult to ignite. When working at high altitude, holding a welding torch or cutting torch in one hand and igniting it in the other will also cause the danger of people or objects falling, or when working in a special place, it is impossible to bring a lighter and other fire sources into it, causing problems such as inability to work. , Automatic ignition device is installed on torch flame cutting machine or CNC cutting machine.

For example, the patent application No. 201710170158.7 "an electronic automatic internal ignition device for cutting torch" discloses a cutting gun body, a cutting nozzle and a DC discharge device arranged on the cutting gun body; the cutting nozzle includes a nozzle core and a nozzle sleeve The nozzle cap of the core, the nozzle core includes the nozzle cap connecting wire, insulator and oxygen outlet nozzle connected in sequence; one electrode of the DC discharge device is electrically connected to the oxygen outlet nozzle, the other electrode is electrically connected to the nozzle cap, and the nozzle cap is connected to the oxygen outlet Sparks can be generated between the mouths. This patent adopts the ignition between the oxygen outlet nozzle and the nozzle cap, and requires the oxygen outlet nozzle to be installed in the cutting nozzle through an insulating tube, which makes the cutting nozzle structure complicated and high production cost.

For example, the patent for "an automatic ignition welding torch" with application number 201810448245.9 discloses a gun body, a gun nozzle, an ignition device and a DC discharge device arranged on the gun body, and the gun body output end is provided with a gun nozzle connection thread , The gun nozzle is arranged on the gun nozzle connecting thread, the ignition device includes an insulating tube sleeved on the gun nozzle, the two opposite side walls of the insulating tube are respectively provided with first perforations, and the axis of each first perforation is connected to the insulating tube The axis is parallel, and each first hole is provided with a discharge needle. The positive and negative electrodes of the DC discharge device are electrically connected to the discharge needle through wires one by one. The discharge needle can be performed at the end of the gun nozzle far away from the gun nozzle connection thread Discharge ignition. In this patent, the distance between the discharge needles is relatively large, a large-voltage DC discharge device is required, and the gun nozzle connection thread needs to be drilled and modified. The manufacturing process is complicated and the cost is high.

Summary of the invention

The purpose of the present invention is to provide an automatic ignition device to solve one or more of the above-mentioned prior art problems.

According to one aspect of the present invention, an automatic ignition device is provided, which includes a welding and cutting nozzle and an insulating sleeve sleeved on the welding and cutting nozzle. The welding and cutting nozzle is a first electrode, and the insulating sleeve is provided with a conductor. The matched second electrode, conductor and welding nozzle can ignite at the fire outlet of the welding nozzle.

The invention does not need to modify the welding and cutting nozzle, has simple structure, low production cost, convenient replacement, and the insulating sleeve can protect the welding and cutting nozzle from being directly heated by the high-temperature flame, thereby prolonging the service life.

In some embodiments: the insulating sleeve is provided with a mounting cavity for the welding and cutting nozzles, the front and rear ends of the mounting cavity are respectively provided with a first opening and a second opening, and the fire outlet of the welding and cutting nozzle is located at the first opening of the mounting cavity . Therefore, it can be better sleeved and installed outside the welding and cutting nozzle, and the welding and cutting nozzle can be better protected.

In some embodiments: the insulating sleeve is provided with mounting holes for conductor installation, the front and rear ends of the mounting hole are respectively provided with a third opening and a fourth opening, the third opening of the mounting hole is located at the first opening of the mounting cavity, and the conductor One end is located at the third opening of the mounting hole. Thereby, the conductor can generate electric spark between the flame outlet of the welding nozzle and the welding nozzle for ignition.

In some embodiments, the insulating sleeve is provided with a retaining ring at the first opening, the retaining ring fully covers the edge of the flame outlet of the welding and cutting nozzle, and the edge of the inner ring of the retaining ring is close to or flush with the edge of the flame outlet of the welding and cutting nozzle. The retaining ring is provided with a through hole along the radial direction, the through hole is communicated with the mounting hole, the through hole is provided with a fifth opening, the fifth opening is located on the inner wall of the retaining ring, and one end of the conductor is located at the fifth opening. As a result, to avoid ignition between the outer edge of the flame outlet of the welding torch and the conductor, the ignition distance is too far from the flame outlet, which will cause the ignition to fail. The current modification can make the ignition between the conductor and the inner wall of the flame outlet and improve the ignition efficiency And stability.

In some embodiments, a fixing nut is provided at the rear end of the welding and cutting nozzle, and the insulating sleeve and the fixing nut are detachably connected. Therefore, it is convenient to replace and install the insulating sleeve.

In some embodiments, the inner wall ring of the second opening is provided with a first groove, and the outer wall ring of the fixing nut is provided with a second groove that cooperates with the first groove, and further includes a circlip. The circlip is a non-closed ring structure , One side of the first groove is provided with a circlip inlet and outlet, the circlip is arranged in the first groove and the second groove, when the circlip is in a natural state, a part of the circlip is located in the first groove, and the circlip is another A part is located in the second groove; when the circlip is in an open state, all the circlips are in the first groove. Therefore, when the circlip is in its natural state, the insulating sleeve can be fixedly installed on the welding nozzle; when the insulating sleeve needs to be replaced, the insulating sleeve can be separated by only opening the circlip, which facilitates the replacement of the insulating sleeve And installation. Or adopt other mature processes for connection and fixation, such as threaded connection, adhesive connection, socket connection or clip connection, etc.

In some embodiments, handles are provided at both ends of the circlip. Thus, it is convenient to open the circlip.

In some embodiments, the welding and cutting nozzle includes a cutting nozzle or a welding nozzle, and the cutting nozzle includes an acetylene nozzle, a plum blossom nozzle, a machine nozzle, an integrated nozzle or a split nozzle. Therefore, the ignition device of the present invention can be used in a wide range.

Description of the drawings

Figure 1 is a schematic diagram of the structure of an automatic ignition device of the present invention;

Figure 2 is an enlarged view of part A of Figure 1;

Figure 3 is a structural schematic diagram of the welding and cutting nozzle of the automatic ignition device of the present invention and the insulating sleeve matching;

Figure 4 is an enlarged view of part B of Figure 3;

Fig. 5 is a structural schematic diagram of a circlip of an automatic ignition device of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the description of the drawings.

As shown in Figures 1-5, an automatic ignition device includes a welding and cutting nozzle 1 and an insulating sleeve 2 sleeved on the welding and cutting nozzle 1. The insulating sleeve 2 can be made of high temperature resistant insulating materials such as ceramics. The welding and cutting nozzle 1 is the first electrode, and the insulating sleeve 2 is provided with a conductor 201 which is a second electrode matched with the first electrode. The conductor 201 and the welding and cutting nozzle 1 can ignite at the fire outlet of the welding and cutting nozzle. Wherein, the conductor 201 may be a wire, or a wire connected to the discharge needle.

Therefore, there is no need to modify the welding and cutting nozzle, the structure is simple, the production cost is low, and the replacement is convenient, and the insulating sleeve can protect the welding and cutting nozzle from being directly heated by the high-temperature flame, thus prolonging the service life

An installation cavity 202 for the welding and cutting nozzle 1 is excavated in the insulating sleeve 2, and the shape and size of the installation cavity 202 are consistent with the welding and cutting nozzle. A first opening 203 and a second opening 204 are respectively opened at the front and rear ends of the installation cavity 202, and the fire outlet of the welding and cutting nozzle is located at the first opening 203 of the installation cavity 202. It should be noted that in this embodiment, the direction toward the flame outlet of the cutting nozzle is forward. Therefore, it can be better sleeved and installed outside the welding and cutting nozzle, and the welding and cutting nozzle can be better protected. The insulating sleeve can be installed on the welding nozzle in one piece or separately, depending on the product.

The insulating sleeve 2 is also drilled with a mounting hole 210 for the conductor 201 to be installed. The front and rear ends of the mounting hole 210 are respectively provided with a third opening 205 and a fourth opening 206. The third opening 205 of the mounting hole 210 is located at the first of the mounting cavity 202. At an opening 203, one end of the conductor 201 is located at the third opening 205 of the mounting hole 210. Thereby, the conductor can generate electric spark between the flame outlet of the welding nozzle and the welding nozzle for ignition.

The insulating sleeve 2 is provided with a retaining ring 207 at the first opening 203. The retaining ring 207 can be integrally formed on the insulating sleeve 2. The retaining ring 207 fully covers the edge of the fire outlet of the welding nozzle 1, and the inner ring edge of the retaining ring 207 is close or aligned. It is flat on the edge of the fire outlet inner ring of the welding and cutting nozzle 1, the retaining ring 207 is provided with a through hole 208 in the radial direction, the through hole 208 is connected with the mounting hole 210, and the through hole 208 is provided with a fifth opening 209, which is located in the retaining ring 207 On the inner wall, one end of the conductor 201 is located at the fifth opening 209. Therefore, the ignition between the outer edge of the flame outlet of the welding torch and the conductor is avoided, and the ignition distance is too far away from the flame outlet, resulting in no ignition. The technical solution of the present invention enables ignition between the conductor and the inner wall of the flame outlet. Improve ignition efficiency and stability.

The rear end of the welding and cutting nozzle 1 is usually provided with a fixing nut 11 for installing the welding and cutting nozzle 1 on a welding torch, a cutting gun, a flame cutting machine or a numerical control cutting machine, etc., and the insulating sleeve 2 and the fixing nut 11 are detachably connected.

The inner wall of the second opening 204 is circumferentially provided with a first groove 211, and the outer wall of the fixing nut 11 is circumferentially provided with a second groove 12 that matches with the first groove 211, and further includes a circlip 3, the first groove 211 can be connected to The second groove 12 is combined into an installation groove for the circlip 3 to be installed. The circlip 3 is a non-closed ring structure, that is to say, there is an opening on one side, and the opening can occupy a quarter of the size of the circlip 3. One side of the first groove 211 is provided with a circlip inlet and outlet 212. The circlip 3 is clamped in the first groove 211 and the second groove 12. When the circlip 3 is in a natural state, a part of the circlip 3 is located in the first groove. In the groove 211, another part of the circlip 3 is located in the second groove 12; when the circlip 3 is in an open state, all the circlip 3 is located in the first groove 12. Therefore, when the circlip is in its natural state, the insulating sleeve can be fixedly installed on the welding nozzle; when the insulating sleeve needs to be replaced, the insulating sleeve can be separated by only opening the circlip, which facilitates the replacement of the insulating sleeve And installation.

A handle 31 is integrally formed at both ends of the circlip 3. Thus, it is convenient to open the circlip.

The welding nozzle 1 includes a cutting nozzle or a welding nozzle, and the cutting nozzle may include an acetylene nozzle, a plum blossom nozzle, a machine nozzle, an integrated nozzle or a split nozzle. Therefore, the ignition device of the present invention can be used in a wide range.

The above is only one embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and similar modifications and improvements can be made. It should also be regarded as within the protection scope of the present invention.

Claims

An automatic ignition device, characterized in that it comprises a welding and cutting nozzle (1) and an insulating sleeve (2) sleeved on the welding and cutting nozzle (1), the welding and cutting nozzle (1) is a first electrode, and The insulating sleeve (2) is provided with a conductor (201), the conductor (201) is a second electrode matched with the first electrode, and the conductor (201) and the welding nozzle (1) can be Ignite at the fire outlet of the cutting nozzle.
The automatic ignition device according to claim 1, wherein the insulating sleeve (2) is provided with a mounting cavity (202) for the welding and cutting nozzle (1), and the mounting cavity (202) ) The front and rear ends are respectively provided with a first opening (203) and a second opening (204), and the fire outlet of the welding and cutting nozzle is located at the first opening (203) of the installation cavity (202).
The automatic ignition device according to claim 2, characterized in that: the insulating sleeve (2) is provided with a mounting hole (210) for the conductor (201) to be installed, and the mounting hole (210) A third opening (205) and a fourth opening (206) are respectively provided at both ends, and the third opening (205) of the mounting hole (210) is located at the first opening (203) of the mounting cavity (202), One end of the conductor (201) is located at the third opening (205) of the mounting hole (210).
The automatic ignition device according to claim 3, characterized in that: the insulating sleeve (2) is provided with a retaining ring (207) at the first opening (203), and the retaining ring (207) is fully Covering the edge of the flame outlet of the welding and cutting nozzle (1), the inner ring edge of the retaining ring (207) is close to or flush with the edge of the flame outlet of the welding and cutting nozzle (1), and the retaining ring (207) ) Is provided with a through hole (208) in the radial direction, the through hole (208) is in communication with the mounting hole (210), the through hole (208) is provided with a fifth opening (209), the fifth opening Located on the inner wall of the retaining ring (207), one end of the conductor (201) is located at the fifth opening (209).
The automatic ignition device according to claim 1, characterized in that: the rear end of the welding and cutting nozzle (1) is provided with a fixing nut (11), the insulating sleeve (2) and the fixing nut (11) Removable connection.
The automatic ignition device according to claim 2, characterized in that: the inner wall ring of the second opening (204) is provided with a first groove (211), and the outer wall ring of the fixing nut (11) is provided with a The second groove (12) matched with the first groove (211) further includes a circlip (3), the circlip (3) is a non-closed ring structure, and the first groove (211) One side is provided with a circlip inlet and outlet (212). The circlip (3) is arranged in the first groove (211) and the second groove (12). When the circlip (3) is in a natural position In the state, a part of the circlip (3) is located in the first groove (211), and another part of the circlip (3) is located in the second groove (12); when the circlip (3) is in tension In the open state, the circlips (3) are all located in the first groove (12).
An automatic ignition device according to claim 6, characterized in that: both ends of the circlip (3) are provided with handles (31).
The automatic ignition device according to claim 1, wherein the welding and cutting nozzle (1) includes a cutting nozzle or a welding nozzle, and the cutting nozzle includes an acetylene nozzle, a plum blossom nozzle, a machine nozzle, an integrated nozzle or a split nozzle. Asanas mouth.