CN220943618U

CN220943618U - Welding torch

Info

Publication number: CN220943618U
Application number: CN202322519665.0U
Authority: CN
Inventors: 吴飞
Original assignee: Panasonic Welding Systems Tangshan Co Ltd
Current assignee: Panasonic Welding Systems Tangshan Co Ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-14
Anticipated expiration: 2033-09-15

Abstract

The application discloses a welding torch, which relates to the technical field of welding and comprises the following components: an electrode; the insert is sleeved on the periphery of the electrode; the shell is sleeved on the periphery of the insert; the first nozzle is connected with the insert and sleeved on the periphery of the electrode; the second nozzle is connected with the shell and sleeved on the periphery of the first nozzle; the first gas channel is arranged between the insert and the electrode, the gas inlet end of the first gas channel is externally connected with a first gas source, and the gas outlet end of the first gas channel is communicated with the annulus between the first nozzle and the electrode; and the second gas channel is arranged in the inner cavity of the shell, the gas inlet end of the second gas channel is externally connected with a second gas source, and the gas outlet end of the second gas channel is communicated with the annulus between the second nozzle and the first nozzle. By arranging the first gas channel, the second gas channel, the first nozzle and the second nozzle, the welding torch can be additionally provided with an inner layer of gas flow and an outer layer of gas flow; during welding, the air flow of the inner layer flows fast, so that the welding penetration can be increased, the welding seam is protected by the air flow of the outer layer, and the air protection width can be maintained. In addition, the welding torch is small in size and has good accessibility.

Description

Welding torch

Technical Field

The application relates to the technical field of welding, in particular to a welding torch.

Background

In the prior art, argon tungsten-arc welding (Tungsten Inert Gas, TIG for short) is a high-quality welding method commonly used for engineering construction, is widely used for backing weld beads for welding pipelines and equipment, and has stable welding process and attractive forming. In the field of heavy current welding of medium plates, liquid cooling TIG welding torches are mostly used for welding, in the fillet weld working condition, penetration is often insufficient, the condition that the welding process does not reach the standard occurs, and countermeasures of replacing a small-caliber nozzle and increasing current are generally adopted, but the gas protection width is reduced when the small-caliber nozzle is replaced, and the heat affected zone is increased when the current is increased.

Disclosure of utility model

In view of the above, the present application aims to provide a welding torch for solving the technical problem of insufficient welding penetration in the prior art.

In order to achieve the above purpose, the present application provides the following technical solutions:

the application provides a welding torch, comprising:

The electrode is provided with a tip end and a tail end which are oppositely arranged, and the electrode is electrically connected with the cable assembly;

The insert is sleeved on the periphery of the electrode, and the electrode is fixed on the insert through a locking mechanism;

The shell is sleeved on the periphery of the insert;

The first nozzle is connected with the insert, sleeved on the periphery of the electrode and arranged close to the tip of the electrode;

The second nozzle is connected with the shell and sleeved on the periphery of the first nozzle;

The first gas channel is arranged between the insert and the electrode, a first gas source is externally connected to the gas inlet end of the first gas channel, and the gas outlet end of the first gas channel is communicated with the annulus between the first nozzle and the electrode; and

The second gas channel is not communicated with the first gas channel, the second gas channel is arranged in the inner cavity of the shell, a second gas source is externally connected with the gas inlet end of the second gas channel, and the gas outlet end of the second gas channel is communicated with the second nozzle and the annulus between the first nozzle.

Further, the locking mechanism includes:

The opening jacket is sleeved on the periphery of the electrode, the opening jacket is provided with a first end and a second end which are oppositely arranged, a first conical surface is arranged on the periphery of the first end of the opening jacket, a plurality of cuts are formed in the first conical surface, and the plurality of cuts are circumferentially arranged along the first end of the opening jacket;

The electrode jacket is connected to one end of the insert, the electrode jacket is sleeved on the periphery of the opening jacket, and a second conical surface capable of being abutted against the first conical surface is arranged in the inner cavity of the electrode jacket; and

The electrode cap is connected to the other end of the insert, and one end of the electrode cap connected with the insert is abutted against the second end of the opening jacket so that the opening jacket is clamped between the electrode cap and the second conical surface;

When the open-ended jacket is clamped, the notch on the first conical surface contracts, and the first end of the open-ended jacket is tightly held on the electrode, so that the electrode and the insert are fixed.

Further, the first nozzle is connected with the insert through the electrode jacket;

wherein the first nozzle is arranged at one end of the electrode jacket away from the insert.

Further, the second nozzle is connected with the housing through the electrode jacket;

the second nozzle is sleeved on the periphery of the electrode jacket and fixedly connected with the outer periphery of the electrode jacket, and the second nozzle is abutted with the shell.

Further, the air inlet end of the first air channel is connected with a first air pipeline, and the first air pipeline is externally connected with the first air source;

the air inlet end of the second air channel is connected with a second air pipeline, and the second air pipeline is externally connected with a second air source;

the outer cover of first gas pipeline with the outside cover of second gas pipeline is equipped with the handle shell, the handle shell with the casing is connected and both are the angle setting of predetermineeing.

Further, a portion of the open collet structure proximate the second end thereof is in contact with the insert;

The insert and the opening jacket are conductors, and the insert is electrically connected with the cable assembly so as to realize the electrical connection between the electrode and the cable assembly.

Further, a cooling pipeline is arranged around the periphery of the insert;

The liquid inlet end of the cooling pipeline is connected with a liquid inlet pipe;

The liquid outlet end of the cooling pipeline is connected with a liquid return pipe.

Further, the liquid inlet pipe or the liquid return pipe is a conductor, and the insert is electrically connected with the cable assembly through the liquid inlet pipe or the liquid return pipe, so that the electrode is electrically connected with the cable assembly.

Further, the outer cover of feed liquor pipe with the liquid return pipe is equipped with the handle shell, the handle shell with the casing is connected and both are the angle setting of predetermineeing.

Further, a cavity is arranged in the electrode cap, and the extending direction of the cavity is consistent with the extending direction of the electrode;

the tail end of the electrode is placed in the cavity.

Compared with the prior art, the technical scheme has the following beneficial effects:

by arranging the first gas channel, the second gas channel, the first nozzle and the second nozzle, the welding torch can be additionally provided with an inner layer of gas flow and an outer layer of gas flow; during welding, inner-layer air flow flows fast, so that welding penetration can be increased, welding seams can be protected by outer-layer air flow, and air protection width can be maintained. In addition, the welding torch is small in size and has good accessibility.

Drawings

In order that the advantages of the application will be readily understood, a more particular description of the application briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the application and are not therefore to be considered to be limiting of its scope, the application will be described and explained with additional specificity and detail through the use of the accompanying drawings.

FIG. 1 is a schematic diagram of a welding torch according to an exemplary embodiment;

FIG. 2 is an exploded schematic view of a welding torch, according to an exemplary embodiment;

FIG. 3 is a schematic illustration of an assembled configuration of a torch insert, gas conduit, and liquid conduit according to an exemplary embodiment;

fig. 4 is an internal structural schematic diagram showing a partial structure of a welding torch according to an exemplary embodiment.

The reference numerals are as follows:

1-an electrode; 2-inserts; 3-a housing; 4-a first nozzle; 5-a second nozzle; 6-an open-ended jacket; 7-electrode jacket; 8-electrode cap; 9-a first gas conduit; 10-a second gas conduit; 11-a handle housing; 12-a cooling pipeline; 13-a liquid inlet pipe; 14-liquid return pipe.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that embodiments of the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the application.

In the description of the application, the term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B, the term "at least one a or B" or "at least one of a and B" has a meaning similar to "a and/or B" and may include a alone, B alone or a and B; the singular forms "a", "an" and "the" include plural referents; the terms "inboard", "outboard", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. indicate an orientation or positional relationship based on that shown in the drawings, are merely for convenience of description of the application and do not require that the application must be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Moreover, in the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. Furthermore, the terms "exemplary" and "illustration" mean "serving as an example, embodiment, or illustration," any implementation of the application described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments, and although various aspects of the embodiments are shown in the figures, the figures are not necessarily drawn to scale unless specifically indicated. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In order to facilitate understanding of the welding torch provided by the application, an application scene is described first, in the working condition of welding fillet by using the welding torch, penetration is often insufficient, the welding process is not up to standard, a countermeasure of changing a small-caliber nozzle and increasing current is usually adopted, but changing the small-caliber nozzle reduces the gas protection width, and increasing the current increases the heat affected zone.

Therefore, the application provides a welding torch, thereby solving the technical problem of insufficient welding penetration in the prior art.

The technical solution of the present embodiment is described in detail below with reference to the accompanying drawings, and the following embodiments and implementations may be combined with each other without conflict.

In an exemplary embodiment of the present application, a welding torch is provided, as shown in fig. 1 to 4, fig. 1 is a schematic structural view of a welding torch according to an exemplary embodiment; FIG. 2 is an exploded schematic view of a welding torch, according to an exemplary embodiment; FIG. 3 is a schematic illustration of an assembled configuration of a torch insert, gas conduit, and liquid conduit according to an exemplary embodiment; fig. 4 is an internal structural schematic diagram showing a partial structure of a welding torch according to an exemplary embodiment.

As shown in fig. 1 to 4, the welding torch includes an electrode 1, an insert 2, a locking mechanism, a housing 3, a first nozzle 4, a second nozzle 5, a first gas passage, and a second gas passage.

In this embodiment, the electrode 1 is in a rod shape, which has a tip and a tail disposed opposite to each other, and the electrode 1 is electrically connected to the cable assembly; during welding, the welding torch uses the high current and high voltage of the welding machine to collect at the tip of the electrode 1 through the cable assembly and generate heat for melting the part of the workpiece to be welded.

In the embodiment, the insert 2 is in a pipe shape, and threaded holes are formed at two ends of the insert 2 for being assembled and fixed with the locking mechanism; the insert 2 is sleeved on the periphery of the electrode 1, and the electrode 1 is fixed on the insert 2 through a locking mechanism.

Alternatively, the insert 2 is a conductor, which may be used as an intermediate conductor for the electrical connection of the cable assembly to the electrode 1, and in particular, the insert 2 may be a copper insert made of a copper material.

In this embodiment, the casing 3 is tubular, the casing 3 is sleeved on the periphery of the insert 2, and the insert 2 is completely placed in the inner cavity of the casing 3, so as to facilitate the casing 3 to protect the insert 2.

It should be noted that, since the gas channel is provided in the inner cavity of the housing 3, a sealing structure including, but not limited to, a sealing ring is required to be provided between the insert 2 and the housing 3 in order to ensure air tightness.

Wherein, casing 3 is the insulator, wraps up in inserts 2 outside, can improve the security, avoid electric leakage.

In this embodiment, the first nozzle 4 is in a tubular shape, the first nozzle 4 is connected with the insert 2, and there are various connection modes between the first nozzle 4 and the insert 2, and the first nozzle 4 and the insert 2 may be directly connected, for example, the two may be directly connected by a threaded connection, a clamping connection, or the like; the first nozzle 4 and the insert 2 may also be connected by a locking mechanism, i.e. the first nozzle 4 is connected to the locking mechanism, and the connection between the first nozzle 4 and the insert 2 is achieved by the connection of the locking mechanism to the insert 2.

The first nozzle 4 is sleeved on the periphery of the electrode 1, the first nozzle 4 is arranged close to the tip of the electrode 1, an annulus is formed between the first nozzle 4 and the electrode 1, and the annulus can be used as an outlet of inner-layer airflow.

In this embodiment, the second nozzle 5 is in a tubular shape, the second nozzle 5 is connected with the housing 3, and the connection mode between the second nozzle 5 and the housing 3 is various, and may be that the second nozzle 5 is directly connected with the housing 3, for example, the two may be connected by adopting a threaded connection, a clamping connection, or the like; the second nozzle 5 and the housing 3 may also be connected by a locking mechanism, i.e. the second nozzle 5 is connected to the locking mechanism, and the second nozzle 5 is then in abutment with the housing 3.

It should be noted that, since the gas passage is provided in the inner cavity of the housing 3, a sealing structure including, but not limited to, a seal ring is required to be provided between the second nozzle 5 and the housing 3 in order to ensure air tightness.

Wherein, the overall size of the second nozzle 5 is larger than that of the second nozzle 5, the second nozzle 5 is sleeved on the periphery of the first nozzle 4, an annulus is formed between the second nozzle 5 and the first nozzle 4, and the annulus can be used as an outlet of the outer air flow; both the outer-layer air flow and the inner-layer air flow are ejected from the tip side of the electrode 1, and the outer-layer air flow is wound around the outer periphery of the inner-layer air flow.

In this embodiment, the first gas channel is disposed between the insert 2 and the electrode 1, and the gas inlet end of the first gas channel is externally connected with a first gas source, and the gas outlet end of the first gas channel is communicated with the annulus between the first nozzle 4 and the electrode 1.

Wherein, first air supply is used for providing inlayer air current to first gas passage, and inlayer air current can be spouted through the annular space between first nozzle 4 and electrode 1 through first gas passage, and during the welding, inlayer air current can strike the welding seam to increase the welding penetration.

In the present embodiment, the second gas passage is provided in the inner cavity of the housing 3, in particular, the second gas passage may be an annulus between the housing 3 and the locking mechanism; the second gas channel is not communicated with the first gas channel in the welding torch, the gas inlet end of the second gas channel is externally connected with a second gas source, and the gas outlet end of the second gas channel is communicated with the annular space between the second nozzle 5 and the first nozzle 4.

The second air source is used for providing an outer air flow for the second air channel, the outer air flow can be sprayed out from an annular space between the second nozzle 5 and the first nozzle 4 through the second air channel, and during welding, the outer air flow can protect welding seams and maintain the air protection width.

By adopting the structural design, the welding torch can be additionally provided with the inner layer and the outer layer of air flow by arranging the first air channel, the second air channel, the first nozzle 4 and the second nozzle 5; during welding, inner-layer air flow flows fast, so that welding penetration can be increased, welding seams can be protected by outer-layer air flow, and air protection width can be maintained. In addition, the welding torch is small in size and has good accessibility.

In some exemplary embodiments, as shown in fig. 2-4, the locking mechanism includes an open collet 6, an electrode collet 7, and an electrode cap 8.

In this embodiment, the open jacket 6 is tubular, the open jacket 6 has a first end and a second end that are disposed opposite to each other, a first conical surface is disposed on an outer periphery of the first end of the open jacket 6, a plurality of slits are disposed on the first conical surface, and the plurality of slits are circumferentially disposed along the first end of the open jacket 6.

Wherein the open collet 6 is fitted around the outer circumference of the electrode 1, specifically, the length of the open collet 6 in its extending direction is shorter than the length of the electrode 1 in its extending direction, a first end of the open collet 6 is placed in the inner cavity of the electrode collet 7 and is disposed between the electrode collet 7 and the electrode 1, and a second end of the open collet 6 is placed in the insert 2 and is disposed between the insert 2 and the electrode 1.

Alternatively, the split collet 6 is a conductor, and the split collet 6 is connected between the insert 2 and the electrode 1, and may serve as an intermediate conductor for electrical connection of the cable assembly to the electrode 1.

It should be noted that, considering that the first gas channel is further provided between the insert 2 and the electrode 1, the open jacket 6 is located in the first gas channel, so that, in order to ensure the smoothness of the first gas channel, the inner air flow may flow from the space between the open jacket 6 and the insert 2, and when the inner air flow flows to the first end of the open jacket 6, it may enter the annulus between the electrode 1 and the first nozzle 4 from the cut. However, in order to achieve the electrical connection between the electrode 1 and the cable assembly, the insert 2 and the open jacket 6 as intermediate conductors need to be in contact with each other, specifically, a portion of the open jacket 6 near the second end thereof is in contact with the insert 2, while ensuring that the connection of the open jacket 6 and the insert 2 does not affect the patency of the first gas channel.

In this embodiment, the electrode holder 7 is tubular, the electrode holder 7 is connected to one end of the insert 2, and there are various connection modes between the electrode holder 7 and the insert 2, for example, the two may be connected by a threaded connection, a clamping connection, or the like.

Wherein the electrode holder 7 is fitted around the outer circumference of the open-ended holder 6, specifically, the electrode holder 7 may be coaxially connected with the insert 2, and the portion of the open-ended holder 6 exposed outside the insert 2 is fitted by the electrode holder 7.

It should be noted that, a second conical surface is further disposed in the inner cavity of the electrode jacket 7, and the second conical surface can be abutted against the first conical surface, when the first conical surface and the second conical surface are abutted in place, the incision on the first conical surface will shrink, so that the first end of the open-ended jacket 6 can shrink and hug tightly on the electrode 1.

In this embodiment, the electrode cap 8 is connected to the other end of the insert 2, that is, the electrode cap 8 and the electrode jacket 7 are disposed at two ends of the insert 2, and there are various connection modes between the electrode cap 8 and the insert 2, for example, the two may be connected by a threaded connection, a clamping connection, or the like.

Optionally, a cavity is arranged inside the electrode cap 8, and the extending direction of the cavity is consistent with the extending direction of the electrode 1; the tail end of the electrode 1 is placed in the cavity, and the electrode 1 is accommodated by the cavity, so that the welding torch can be suitable for the electrodes 1 with different lengths, or the length of the part of the electrode 1 extending out of the electrode cap 8 can be adjusted.

It should be noted that, since the gas channel is disposed in the inner cavity of the insert 2, a sealing structure including, but not limited to, a sealing ring is required to be disposed between the electrode cap 8 and the insert 2 to ensure air tightness.

Wherein, one end of the electrode cap 8 connected with the insert 2 is abutted against the second end of the open-ended jacket 6, so that the open-ended jacket 6 is clamped between the second conical surfaces of the electrode cap 8 and the electrode jacket 7; specifically, when the electrode cap 8 is connected to the insert 2, the electrode cap 8 moves against the second end of the open jacket 6, and makes the first conical surface of the first end of the open jacket 6 abut against the second conical surface in the electrode jacket 7, and since the electrode jacket 7 is fixedly connected with the insert 2 and the first conical surface is provided with a notch, the first conical surface can only abut against the second conical surface to move along and shrink the notch, so that the first end of the open jacket 6 is tightly held on the electrode 1, and since the open jacket 6 is clamped and fixed on the insert 2 by the electrode cap 8 and the electrode jacket 7 together, the fixation between the electrode 1 and the insert 2 can be realized.

In this embodiment, the first nozzle 4 is connected to the insert 2 by an electrode jacket 7; wherein the first nozzle 4 is arranged at the end of the electrode jacket 7 remote from the insert 2. There are various connection modes between the first nozzle 4 and the electrode jacket 7, for example, the two may be connected by a threaded connection, a clamping connection, or the like.

In the present embodiment, the second nozzle 5 is connected to the housing 3 through an electrode jacket 7; the second nozzle 5 is sleeved on the outer periphery of the electrode jacket 7 and fixedly connected with the electrode jacket 7, and the second nozzle 5 is abutted against the shell 3. Specifically, an annular bulge is formed on the outer peripheral wall of the electrode jacket 7, an external thread can be formed on the annular bulge, an internal thread is formed in the inner cavity of the second nozzle 5, and the second nozzle 5 can be fixedly connected with the electrode jacket 7 through the threaded fit of the internal thread and the external thread; in addition, the second nozzle 5 and the opposite surface of the housing 3 are provided with steps, and the two can be engaged with each other by the steps and are abutted against each other, and when the second nozzle 5 and the electrode holder 7 are fixed, the second nozzle 5 is abutted against the housing 3 exactly.

It should be noted that, the second gas passage may be an annulus between the housing 3 and the locking mechanism, but the arrangement of the annular protrusion hinders the smoothness of the second gas passage, so that the annulus between the second gas passage and the second nozzle 5 and the first nozzle 4 is not communicated, and therefore, a manner of forming a through hole at the annular protrusion is adopted to communicate the annulus between the second gas passage and the second nozzle 5 and the first nozzle 4, so as to ensure smooth ejection of the outer air flow.

In the embodiment, the air inlet end of the first air channel is connected with a first air pipeline 9, and the first air pipeline 9 is externally connected with a first air source; the air inlet end of the second air channel is connected with a second air pipeline 10, and the second air pipeline 10 is externally connected with a second air source.

Alternatively, the first air source and the second air source are different air sources, and the two air sources can supply air to the first air pipeline 9 and the second air pipeline 10 respectively so as to form an inner air flow and an outer air flow, and can control the flow and the speed of the inner air flow and the outer air flow respectively.

Optionally, the first air source and the second air source may be the same air source, and the same air source supplies air to the first air pipeline 9 and the second air pipeline 10 through different control valves, so as to form an inner air flow and an outer air flow, and the flow and the speed of the inner air flow and the outer air flow can be controlled by using different control valves respectively.

The flow path of the inner air flow may refer to fig. 4, the inner air flow provided by the first air source enters from the inlet a of the first air pipe 9, then enters the first air channel (the first air channel is the annulus between the open jacket 6 and the insert 2) through the first air pipe 9, then enters the annulus between the electrode 1 and the first nozzle 4 through the incision, and finally is ejected from the outlet B of the annulus between the electrode 1 and the first nozzle 4.

The flow path of the outer air flow may refer to fig. 4, the outer air flow provided by the second air source enters from the inlet C of the second air pipe 10, then enters into the second air channel (the second air channel is the annulus between the shell 3 and the electrode jacket 7) through the second air pipe 10, then enters into the annulus between the first nozzle 4 and the second nozzle 5 through the through holes formed on the electrode jacket 7, and finally is ejected from the outlet D of the annulus between the first nozzle 4 and the second nozzle 5.

Further, the outer covers of the first gas pipe 9 and the second gas pipe 10 are provided with a handle housing 11, and the handle housing 11 is connected with the housing 3 and is arranged at a preset angle. The handle shell 11 and the shell 3 are connected in various modes, and the handle shell 11 and the shell 3 can be integrally manufactured or connected in a threaded connection mode, a clamping mode and the like; the predetermined angle between the handle housing 11 and the case 3 is not limited herein, and it is mainly considered that the handle housing 11 is convenient to be held by hand.

It should be noted that, the handle housing 11 and the housing 3 are both insulators, for example, the handle housing 11 and the housing 3 are both made of silicone rubber. The handle shell 11 and the shell 3 are mainly wrapped outside the part (such as the insert 2 and the like) which needs to be conductive in the welding torch, so that the safety can be improved, and electric leakage can be avoided.

Optionally, the gas provided by the first gas source and the second gas source is argon.

In this embodiment, in order to achieve electrical connection between the electrode 1 and the cable assembly, the heat dissipation capacity of the insert 2 as the intermediate conductor is large; for this purpose, the insert 2 needs to be cooled to ensure proper operation of the welding torch. Specifically, the outer periphery of the insert 2 is provided with a cooling pipe 12; the cooling pipeline 12 is coiled at the periphery of the insert 2, the cooling pipeline 12 can cool the insert 2 in a liquid cooling mode, the cooling pipeline 12 is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end of the cooling pipeline 12 is connected with a liquid inlet pipe 13, the liquid outlet end of the cooling pipeline 12 is connected with a liquid return pipe 14, the liquid inlet pipe 13 and the liquid return pipe 14 can be connected to a cooling liquid box body, and cooling liquid sequentially flows through the liquid inlet pipe 13, the cooling pipeline 12 and the liquid return pipe 14 under the driving of a power mechanism and flows back into the cooling liquid box body to form a cooling liquid circulation loop, and the cooling liquid and the insert 2 are utilized for heat exchange to cool the insert 2; optionally, the cooling fluid includes, but is not limited to, water.

Further, the liquid inlet pipe 13 or the liquid return pipe 14 is a conductor, and the insert 2 is electrically connected with the cable assembly through the liquid inlet pipe 13 or the liquid return pipe 14, so as to realize the electrical connection between the electrode 1 and the cable assembly.

Further, the inlet duct 13 and the return duct 14 may be integrated in the handle housing 11 together with the first gas duct 9 and the second gas duct 10.

The embodiment discloses a welding torch, through setting up first gas passage, second gas passage and first nozzle 4 and second nozzle 5, can make the welding torch add inside and outside two-layer air current. In the welding process, the welding torch gathers on the electrode 1 by utilizing the heat generated by the high current and the high voltage of the welding machine, and melts the part of the workpiece to be welded; the inner-layer air flow is fast in flow speed after passing through the first nozzle 4, the electric arc shape can be compressed, the penetration depth is deepened, and meanwhile, the outer-layer air flow is sprayed out after passing through the second nozzle 5, so that the welding seam can be protected widely.

While the fundamental and principal features of the application and advantages of the application have been shown and described, it will be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A welding torch, comprising:

The shell is sleeved on the periphery of the insert;

2. The welding torch of claim 1 wherein the locking mechanism comprises:

3. The welding torch of claim 2 wherein the first nozzle is connected to the insert through the electrode jacket;

4. The welding torch of claim 2 wherein the second nozzle is connected to the housing by the electrode jacket;

5. The welding torch according to claim 1 or 2, wherein the gas inlet end of the first gas channel is connected to a first gas pipe, the first gas pipe being externally connected to the first gas source;

6. The welding torch of claim 2 wherein a portion of the open ended jacket proximate the second end thereof is in contact with the insert;

7. The welding torch according to claim 6, wherein the insert has a cooling channel around its periphery;

8. The welding torch of claim 7, wherein the feed-through tube or the return tube is a conductor, and the insert is electrically connected to the cable assembly through the feed-through tube or the return tube to effect electrical connection of the electrode to the cable assembly.

9. The welding torch according to claim 7 or 8, wherein the outer cover of the feed pipe and the return pipe is provided with a handle housing, which is connected to the housing and both are arranged at a predetermined angle.

10. The welding torch according to claim 2, wherein a cavity is provided inside the electrode cap, and an extending direction of the cavity coincides with an extending direction of the electrode;

the tail end of the electrode is placed in the cavity.