CN211052811U

CN211052811U - Build-up welding torch

Info

Publication number: CN211052811U
Application number: CN201921213841.5U
Authority: CN
Inventors: 李兆展
Original assignee: Qingdao Daneng Welding Engineering Co ltd
Current assignee: Qingdao Daneng Welding Engineering Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-07-21
Anticipated expiration: 2029-07-30

Abstract

The utility model provides a build-up welding torch, including outer spray tube, accept in this outer spray tube interior spray tube, accept in interior spray tube centre bore tungsten electrode, connect main power source between this tungsten electrode and the substrate of processed thing and connect the secondary power between tungsten electrode and interior spray tube, form the infundibulate space between this interior spray tube and the outer spray tube, the top in this infundibulate space forms the leading-in portion of inside salient, be equipped with the powder confession mouth with leading-in portion intercommunication on the outer spray tube, the tangential direction that the powder confession mouth was followed outer spray tube extends the setting. This build-up welding torch accessible preheats equipment and realizes preheating of piston rod and welding set's guide, realizes the build-up welding through welding set and handles, and the build-up welding layer is even, can avoid current manual work to handle, improves work efficiency.

Description

Build-up welding torch

Technical Field

The utility model relates to a welding equipment, in particular to build-up welding torch.

Background

Welding plays a vital role in various metal making industries, which is the creation of a high energy density forming molten pool on a workpiece. Plasma welding is a process technology for melting a workpiece by using a compressed plasma arc as an energy source to perform welding, in the welding process, a plasma arc formed by ionized gas is compressed, the energy is more concentrated, the high-energy plasma arc generates dynamic pressure, and the electric arc can penetrate through a molten liquid pool. The existing welding torch for plasma surfacing has the problem that powder is supplied vertically downwards, so that the powder is reduced, and a surfacing layer is not uniform and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a build-up welding torch has solved the inhomogeneous problem of build-up welding layer among the prior art.

The technical scheme of the utility model is realized like this:

the utility model provides a build-up welding torch, includes outer spray tube, accept interior spray tube in this outer spray tube, accept the tungsten electrode in interior spray tube centre bore, connect main power supply between this tungsten electrode and the substrate of machined object and connect the secondary power supply between tungsten electrode and interior spray tube, form infundibulate space between this interior spray tube and the outer spray tube, the top in this infundibulate space forms the leading-in portion that inwards extrudes, be equipped with the powder that communicates with the leading-in portion on the outer spray tube and supply the entry, the powder supplies the entry to extend the setting along the tangential direction of outer spray tube.

Preferably, the bottom end of the outer nozzle corresponding to the guiding part protrudes inwards to form a shoulder.

Preferably, the inner nozzle and the outer nozzle are respectively provided with a cold water passage, and the outer nozzle is provided with a cold water port communicated with the cold water passage.

The preferable scheme is that the head end of the outer spray pipe is provided with a protective gas channel at the periphery of the central hole of the inner spray pipe and the bottom end of the funnel-shaped space, and the outer side of the outer spray pipe is provided with a protective gas feed inlet communicated with the protective gas channel.

Preferably, the powder supply inlets are two powder supply inlets arranged on two opposite sides of the outer nozzle.

The utility model has the advantages that:

the utility model discloses build-up welding torch accessible preheats equipment and realizes preheating of piston rod and welding set's guide, realizes through welding set that the build-up welding is handled, and the build-up welding layer is even, can avoid current manual work to handle, improves work efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a surfacing welding torch according to the present invention;

fig. 2 is a sectional view of a portion corresponding to the powder supply inlet of fig. 1.

In the figure:

10. an outer nozzle; 20. an inner nozzle; 30. a tungsten electrode; 40. a main power supply; 50. a secondary power supply; 60. a funnel-shaped space; 11. an introduction section; 12. a powder supply inlet; 13. a shoulder portion; 14. 24, a cold water passage; 16. A cold water port; 21. a central bore; 18. a shielding gas channel; 19. a shielding gas inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the overlay welding torch includes an outer nozzle 10, an inner nozzle 20 accommodated in the outer nozzle 10, a tungsten electrode 30 accommodated in a center hole of the inner nozzle 20, a main power supply 40 connected between the tungsten electrode 30 and a base material of a workpiece, and a sub power supply 50 connected between the tungsten electrode 30 and the inner nozzle 20, wherein a funnel-shaped space 60 is formed between the inner nozzle 20 and the outer nozzle 10, and a leading-in portion 11 of the funnel-shaped space 60 protrudes inward from a tip end thereof. The outer nozzle 10 is provided at opposite sides thereof with powder supply ports 12 communicating with the introduction part 11, respectively, and the powder supply ports 12 are extended in a tangential direction of the outer nozzle 10. The outer spout 10 protrudes inwardly to form a shoulder 13 corresponding to the bottom end position of the introduction portion 11.

The inner and

outer nozzles

20 and 10 are formed with

cold water passages

24 and 14, respectively, and the outer nozzle 10 is formed with a cold water port 16 communicating with the

cold water passages

24 and 14. The head end of the outer nozzle 10 is provided with a shielding gas passage 18 at the center hole 21 of the inner nozzle 20 and the periphery of the bottom end of the funnel-shaped space 60, and the outer side of the outer nozzle 10 is provided with a shielding gas inlet 19 communicated with the shielding gas passage.

When the plasma welding device is used, welding metal powder enters from the powder supply inlet 12, and the powder supply inlet 12 extends along the tangential direction of the outer spray pipe 10, so that the entering metal powder is dispersed along the axial direction of the leading-in part and extends downwards along the funnel-shaped space in a spiral shape, and is uniformly distributed around the plasma arc sprayed from the central hole 21, and the uniformity of a welding layer is achieved. Meanwhile, cold water is supplied through the cold water passage, so that a cooling effect is achieved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A build-up welding torch characterized by: the inner spray pipe and the outer spray pipe form a funnel-shaped space, the top end of the funnel-shaped space forms an inward protruding leading-in part, the outer spray pipe is provided with a powder supply inlet communicated with the leading-in part, and the powder supply inlet extends along the tangential direction of the outer spray pipe.

2. The hardfacing torch of claim 1, wherein: the bottom end position of the outer spray pipe corresponding to the guide-in part protrudes inwards to form a shoulder.

3. The hardfacing torch of claim 1, wherein: the inner spray pipe and the outer spray pipe are respectively provided with a cold water passage, and the outer spray pipe is provided with a cold water port communicated with the cold water passage.

4. The hardfacing torch of claim 1, wherein: the head end of the outer spray pipe is provided with a protective gas channel at the center hole of the inner spray pipe and the periphery of the bottom end of the funnel-shaped space, and the outer side of the outer spray pipe is provided with a protective gas feed inlet communicated with the protective gas channel.

5. The hardfacing torch of any of claims 1 to 4, wherein: the powder supply inlets are two arranged at two opposite sides of the outer spray pipe.