CN217398958U

CN217398958U - Low-cost refractory alloy auxiliary electrode structure for VAR

Info

Publication number: CN217398958U
Application number: CN202220749808.XU
Authority: CN
Inventors: 杨策; 吴江涛; 张军; 陈朝; 刘向宏; 冯勇
Original assignee: Western Superconducting Technologies Co Ltd
Current assignee: Western Superconducting Technologies Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-09-09
Anticipated expiration: 2032-03-29

Abstract

A low-cost refractory alloy auxiliary electrode structure for VAR comprises an upper part of an auxiliary electrode, a lower part of the auxiliary electrode and a barrier ring; the auxiliary electrode is designed in a split mode, the upper portion of the auxiliary electrode is made of a material with strength and hardness meeting the requirements of repeated use of the VAR, a clamping head and the like are machined at one end of the auxiliary electrode according to the requirements of VAR furnace equipment, and an inner hole thread is machined at the other end of the auxiliary electrode; the lower part of the auxiliary electrode is made of refractory metal materials meeting requirements, wherein one end of the auxiliary electrode is machined with external threads, and the other end of the auxiliary electrode is machined to be in a flat state; the upper part of the auxiliary electrode is screwed with the lower part of the auxiliary electrode through threads to obtain a usable auxiliary electrode whole body; a blocking ring is arranged between the upper part of the auxiliary electrode and the lower part of the auxiliary electrode. The utility model has the advantages of reasonable design, satisfy the requirement that the VAR stove was smelted completely, effectively reduced the preparation cost of refractory metal auxiliary electrode for the VAR stove.

Description

Low-cost refractory alloy auxiliary electrode structure for VAR

Technical Field

The invention belongs to the technical field of nonferrous metal processing, and particularly relates to a low-cost refractory alloy auxiliary electrode structure for a vacuum consumable electric arc furnace.

Background

A vacuum consumable electrode arc furnace (VAR furnace) is a main metallurgical smelting device for producing nonferrous metals and refractory metals, and an auxiliary electrode is a key accessory and a main consumable material for connecting an electrode rod and a consumable electrode in the VAR furnace smelting. The auxiliary electrode for the VAR is made of materials and has a structure which can ensure the safe and easy production of melting, the self strength of the auxiliary electrode needs to bear the dead weight of the consumable electrode, the machined chuck bears the repeated clamping of a ball type pneumatic chuck of an electrode rod of the VAR furnace, the length of the chuck needs to enable the consumable electrode to be completely melted into a water-cooled crucible, and the material selection needs to be economical.

At present, when the VAR furnace is used for producing metals such as titanium, zirconium and the like, the auxiliary electrode is generally made of corresponding pure metal or material which is the same as that of the electrode to be melted, and is integrally machined and prepared according to the application requirements of the VAR furnace, or a clamping head part is machined and prepared according to the requirements and then welded and lengthened to obtain the auxiliary electrode. The material selection and preparation method of the auxiliary electrode are widely applied to the field of ingot production of titanium, zirconium and the like, and when refractory metals such as tungsten, molybdenum, tantalum, niobium and the like and alloy ingot casting thereof are produced, the cost of the raw materials using the same material is high, and the machining performance is poor; or because the hardness and the strength of the material are low, the prepared chuck can not bear repeated clamping of a ball type pneumatic chuck of the VAR furnace, so that the matched auxiliary electrode can not refer to the selection or preparation mode of titanium, zirconium and the like, and the problems that the auxiliary electrode for the refractory metal is difficult to process, the material cost is high, or the smelting safety of the VAR furnace can not be ensured are caused.

Disclosure of Invention

In order to solve the problems that the self weight of the consumable electrode cannot be borne, the auxiliary electrode cannot be separated and the like, the invention adopts the technical scheme that: a low-cost refractory alloy auxiliary electrode structure for VAR is characterized by comprising an auxiliary electrode upper part, a barrier ring and an auxiliary electrode lower part, wherein the auxiliary electrode upper part is detachably connected with the auxiliary electrode lower part, and the barrier ring is arranged between the auxiliary electrode upper part and the auxiliary electrode lower part.

Preferably, the upper end of the upper part of the auxiliary electrode is provided with a clamping head and an arc breaking groove for clamping, the lower end face of the upper part of the auxiliary electrode is of a planar structure, and the lower end face is provided with an inner hole thread.

Preferably, the upper material of the auxiliary electrode is a material with strength and hardness meeting the requirements of safe smelting and repeated use of the VAR furnace.

Preferably, the upper material of the auxiliary electrode is titanium alloy.

Preferably, the upper end of the lower part of the auxiliary electrode is provided with an external thread, the end face of the lower end of the auxiliary electrode is of a plane structure, and the size of the external thread is matched with the thread of an inner hole in the upper part of the auxiliary electrode.

Preferably, the material of the lower part of the auxiliary electrode is the same material as the refractory metal to be melted.

Preferably, the barrier ring is nested on the external thread of the lower part of the auxiliary electrode.

Preferably, the material of the barrier ring is the same as the material of the lower part of the auxiliary electrode.

Compared with the prior art, the invention has the beneficial effects that:

1. through the split design, the strength and hardness of the upper part of the auxiliary electrode meet the repeated use requirement of the VAR furnace, and the material is low in cost, so that the problem that part of refractory metal is difficult to process or can not be repeatedly clamped is solved, the use amount of the high-price refractory metal is saved, and the preparation cost of the auxiliary electrode is reduced;

2. through the design of threaded connection, the upper part of the auxiliary electrode and the lower part of the auxiliary electrode are reliably connected, the connection strength meets the smelting requirement of the VAR furnace, and the problems that the melting point difference between the material of the upper part of the auxiliary electrode and the material of the lower part of the auxiliary electrode is large, the welding connection strength is poor, and eggs are easy to fall in the smelting process are solved.

3. Due to the arrangement of the blocking ring, the phenomenon that the lower part of the auxiliary electrode is too high in temperature and cannot be separated due to arc starting fusion caused by gap discharge with the upper part of the auxiliary electrode after the VAR furnace is used is prevented.

Drawings

FIG. 1 is a schematic view of the connection of a low cost refractory alloy auxiliary electrode for a VAR according to the present invention;

wherein: 1. auxiliary electrode upper part 2, barrier ring 3, auxiliary electrode lower part 4 and clamping head

Detailed Description

The invention will now be described in detail with reference to the accompanying drawings: referring to fig. 1, the present invention provides a low-cost refractory alloy auxiliary electrode structure for VAR, which includes an upper auxiliary electrode portion 1, a barrier ring 2, a lower auxiliary electrode portion 3; the upper part 1 of the auxiliary electrode is detachably connected with the lower part 3 of the auxiliary electrode, and the barrier ring 2 is arranged between the upper part 1 of the auxiliary electrode and the lower part 3 of the auxiliary electrode.

The upper end of the upper part 1 of the auxiliary electrode is normally processed with a clamping head 4 and an arc breaking groove for clamping according to the requirements of VAR furnace equipment, the lower end face is of a plane structure, and an inner hole thread is arranged on the lower end face.

The upper part 1 of the auxiliary electrode is made of a material with strength and hardness meeting the requirements of safe smelting and repeated use of the VAR furnace, wherein the material comprises titanium alloy, and a chuck 4 of the titanium alloy can bear repeated holding of a ball type pneumatic chuck of the VAR furnace.

The upper end of the lower part 3 of the auxiliary electrode is provided with an external thread, the size of the external thread is matched with that of the internal thread of the upper part 1 of the auxiliary electrode, the screwing connection strength of the internal thread of the upper part 1 of the auxiliary electrode and the external thread of the lower part 3 of the auxiliary electrode can bear the self weight of the consumable electrode, and the egg falling phenomenon cannot occur; the material of the lower part 3 of the auxiliary electrode is the same as that of the electrode to be melted.

The barrier ring 2 is in a circular ring shape, an inner hole of the barrier ring 2 is matched with an external thread of the lower part 3 of the auxiliary electrode, the external diameter of an excircle of the barrier ring 2 is the same as the external diameter of the lower part 3 of the auxiliary electrode, and the barrier ring 2 is nested at one end of the external thread of the lower part 3 of the auxiliary electrode and isolated between the upper part 1 of the auxiliary electrode and the lower part 3 of the auxiliary electrode, so that the phenomenon that the lower part 3 of the auxiliary electrode is too high in temperature, and cannot be separated due to arc fusion caused by gap discharge with the upper part 1 of the auxiliary electrode after the VAR furnace is used is prevented; the material of the barrier ring 2 is selected in accordance with the material of the lower part 3 of the auxiliary electrode.

In summary, the barrier ring 2 is nested at one end of the external thread of the lower part 3 of the auxiliary electrode, and the internal thread of the upper part 1 of the auxiliary electrode is screwed with the external thread of the lower part 3 of the auxiliary electrode, so that a usable whole auxiliary electrode is obtained. After the use, the clamp head 4 at the upper part 1 of the auxiliary electrode can bear the repeated clamping of a ball type pneumatic clamp head of the VAR furnace; the screwing connection strength of the internal thread of the upper part 1 of the auxiliary electrode and the external thread of the lower part 3 of the auxiliary electrode can bear the self weight of the consumable electrode, the phenomenon of 'egg falling' is avoided, and the requirement of safe smelting of a VAR furnace is met; under the action of the barrier ring 2, the rotary joint surfaces of the upper part 1 and the lower part 3 of the auxiliary electrode can be normally rotated to open and close after VAR smelting, and the arc adhesion phenomenon caused by gap discharge does not occur.

The above description is only an example of the present patent and is not intended to limit the scope of the present patent, and all modifications, equivalents, and alternatives falling within the spirit and scope of the present patent application are also encompassed by the present patent disclosure.

Claims

1. A low-cost refractory alloy auxiliary electrode structure for VAR is characterized by comprising an auxiliary electrode upper part, a barrier ring and an auxiliary electrode lower part, wherein the auxiliary electrode upper part is detachably connected with the auxiliary electrode lower part, and the barrier ring is arranged between the auxiliary electrode upper part and the auxiliary electrode lower part.

2. The structure of a low-cost refractory alloy auxiliary electrode for a VAR according to claim 1, wherein a chuck and an arc-breaking groove for clamping are provided at the upper end of the upper part of the auxiliary electrode, the lower end surface of the upper part of the auxiliary electrode is of a planar structure, and an inner hole thread is provided on the lower end surface.

3. The structure of the low-cost refractory alloy auxiliary electrode for a VAR according to claim 1, wherein the upper material of the auxiliary electrode is a material having strength and hardness meeting the requirements of safe melting and repeated use of the VAR furnace.

4. A low cost refractory alloy auxiliary electrode structure for a VAR according to claim 3, wherein said auxiliary electrode upper material is a titanium alloy.

5. The structure of the low-cost refractory alloy auxiliary electrode for the VAR according to claim 2, wherein the upper end of the lower part of the auxiliary electrode is provided with an external thread, the lower end surface of the auxiliary electrode is of a planar structure, and the external thread is matched with the internal hole thread of the upper part of the auxiliary electrode in size.

6. The low-cost refractory alloy auxiliary electrode structure for a VAR according to claim 1, wherein the auxiliary electrode lower material is a same material as the refractory metal to be melted.

7. The low cost refractory alloy auxiliary electrode structure for a VAR according to claim 5, wherein said barrier ring is nested on external threads on a lower portion of said auxiliary electrode.

8. The low cost refractory alloy auxiliary electrode structure for a VAR according to claim 1, wherein said barrier ring material is the same as said auxiliary electrode lower material.