CN217693753U

CN217693753U - Novel butt-joint-free welding joint induction coil for electric induction furnace

Info

Publication number: CN217693753U
Application number: CN202221392459.7U
Authority: CN
Inventors: 沈佳闻
Original assignee: Shanghai Zhaoli Electric Furnace Equipment Co ltd
Current assignee: Shanghai Zhaoli Electric Furnace Equipment Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-10-28
Anticipated expiration: 2032-05-25

Abstract

The utility model relates to a new-type no butt joint welded joint induction coil for induction furnace, it includes that a plurality of is wound into columniform hollow copper pipe, and a plurality of hollow copper pipe establishes ties, and the mouth of pipe of two hollow copper pipes that are connected outwards extends to the water injection well choke, and two water injection well choke departments that are connected are fixed with the connecting piece of non-magnetic conduction. The coil joint has the advantages that the purpose that the coil is free of butt welding joints is achieved, and therefore the effect that the water leakage phenomenon of the coil joint is avoided.

Description

Novel butt-joint-free welding joint induction coil for electric induction furnace

Technical Field

The present application relates to the field of induction coils, and more particularly to a novel butt-joint free welded joint induction coil for an induction furnace.

Background

The working principle of the induction furnace is that the furnace burden is heated and melted by the electromagnetic induction action of an alternating magnetic field generated by electrifying an induction coil on the magnetic conduction furnace burden in the furnace. The induction coil is used as a core component of electromagnetic induction, the operation stability of the induction coil is particularly important, the main body of the induction coil is formed by winding a water-filled copper pipe in a circle, the water-filled copper pipe is generally wound in a dozen to twenty or more circles, and water is filled in the induction coil for cooling. Because the length of copper pipe is limited, after several circles of coiling, need continue the coiling with two copper pipe butt joint welding backs, this has just caused induction coil to have a great deal of welded joint, because the electromagnetic induction effect, the coil can have the vibration phenomenon in the operation process through the heavy current to and the effect of furnace liner expend with heat and contract with cold in the coil is on the coil, make welded joint have the phenomenon of fracture and leaking after operation a period of time, influence equipment operation, damage the furnace liner when serious, cause the serious accident of molten steel seepage.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a novel butt-joint-free welding joint induction coil for an electric induction furnace.

The application provides a new-type no butt weld connects induction coil for induction furnace adopts following technical scheme:

a novel butt-joint-free welded joint induction coil for an induction furnace comprises a plurality of hollow copper pipes wound into a cylindrical shape, the hollow copper pipes are connected in series, pipe orifices of the two connected hollow copper pipes extend outwards to form water nozzles, and non-magnetic connecting pieces are fixed at the positions of the two connected water nozzles.

By adopting the technical scheme, the end parts of two adjacent hollow copper pipes are used as the water passing water nozzles of the coil, and the outer part of the circumference of the coil is fixed by adopting the connecting piece, so that the purpose that the coil has no butt welding joint is achieved, the integral rigidity is enhanced, the coil is not easy to deform, and the phenomenon of water leakage of the coil joint is avoided; the vibration phenomenon of the coil in the operation process of passing large current is reduced.

Preferably, the connecting piece is an aluminum alloy plate, a copper bar or an insulating plate.

By adopting the technical scheme, the aluminum alloy plate has light weight, good rigidity and high strength; good flame retardance, strong acid-base resistance and the like; the copper bar is hard in texture, durable, safe and reliable, wide in temperature tolerance range, resistant to thermal expansion and cold contraction and long in service life; the insulating plate is not magnetic, and does not influence the induction coil.

Preferably, the connecting piece is set to be a copper bar, and the outer package of the copper bar is arranged at the two water nozzles.

By adopting the technical scheme, the stability can be enhanced by the external wrapping mode, so that the magnetic wire capacity of the induction coil is enhanced.

Preferably, the two connected water nozzles are mutually attached at the connecting piece.

By adopting the technical scheme, the gap generated by expansion with heat and contraction with cold is reduced, the magnetic wire capacity of the induction coil is enhanced, and the generation of magnetic leakage is reduced.

Preferably, the connector is arranged at the outer tangent of the wound cylindrical induction coil.

By adopting the technical scheme, the roundness and the precision of the induction coil can be adjusted, and the electromagnetic induction strength can be improved.

Preferably, two water nozzles which are adjacently connected are gradually far away from the connecting piece to the water inlet and outlet end parts of the water nozzles.

Through adopting above-mentioned technical scheme, reinforcing outsourcing copper bar fixed stability.

Preferably, the copper bar is welded and fixed at the hollow copper pipe.

Through adopting above-mentioned technical scheme, the stability of welding is stronger.

Preferably, the hollow copper pipe is wound by a plurality of circles of induction coils, a plurality of water nozzles communicated with the inside of the induction coils are arranged on the side walls of the multiple circles of induction coils, and a water-stop sheet is arranged between every two adjacent water nozzles.

By adopting the technical scheme, the cooling effect of the induction coil is improved, and multi-turn simultaneous annealing is realized.

In summary, the present application includes at least one of the following beneficial technical effects:

the butt welding joint is not used, and the water leakage of the coil joint is avoided;

the copper bar is externally wrapped and welded, so that the rigidity and the stability are strong.

Drawings

FIG. 1 is a conventional coil connector form;

fig. 2 is a coil terminal form according to an embodiment of the present application.

Reference numerals: 1. a water copper pipe is filled; 2. welding a joint; 3. a bushing; 4. a water nozzle; 5. a water-stop sheet; 6. a hollow copper tube; 7. copper bars are arranged.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

Referring to fig. 1, a conventional coil joint is provided, in which a main body of an induction coil is formed by winding a water-filled copper tube 1 in a circle, generally, the water-filled copper tube is wound in tens of to twenty or more circles, and water is filled in the induction coil for cooling. Because the length of the copper pipe is limited, after one copper pipe is wound for several circles, two copper pipes need to be welded in a butt joint mode and then continuously wound, and therefore the induction coil is provided with a plurality of welding joints 2. The welding joint 2 is provided with a lining 3 inside the water-passing copper pipe 1, two water nozzles 4 are arranged on each ring, a water-stop sheet 5 is arranged inside the water-passing copper pipe 1 between the two water nozzles 4, and independent water inlet and return cooling circulation of each ring is realized to realize synchronous annealing of the induction coil.

The embodiment of the application discloses a novel butt-joint-free welding joint induction coil for an electric induction furnace.

Referring to fig. 2, a novel butt-joint-free welded joint induction coil for an induction furnace comprises a plurality of hollow copper pipes 6 wound into a cylindrical shape in a spiral manner, the plurality of hollow copper pipes 6 are connected in series, pipe orifices of two connected hollow copper pipes 6 extend outwards to form water nozzles 4, and non-magnetic-conductive connecting pieces are fixed at the positions of the two connected water nozzles 4.

The connecting piece can be established to aluminium alloy plate, copper bar 7 or insulation board in this application. Wherein, the aluminum alloy plate has light weight, good rigidity and high strength; good flame retardance, strong acid-base resistance and the like; the copper bar 7 is hard in texture, durable, safe and reliable, wide in temperature tolerance range, resistant to thermal expansion and cold contraction and long in service life; the insulating plate is not magnetic, and does not influence the induction coil.

Copper bar 7 is established to the connecting piece in this embodiment, and the welding is located at two water injection well choke 4 in the outsourcing of copper bar 7. To enhance the magnetic wire capability of the induction coil, the generation of leakage flux is reduced. The two connected water nozzles 4 are tightly attached to each other at the connecting piece, and can adapt to the gap generated by expansion with heat and contraction with cold. The copper bar 7 is positioned at the outer tangent of the wound cylindrical induction coil, and the water nozzle 4 is gradually far away from the end part of the water inlet from the copper bar 7.

In addition, referring to fig. 1, in the same place as the conventional induction coil, a hollow copper tube 6 may be wound as a multi-turn induction coil, the side wall of the multi-turn induction coil is provided with a plurality of water nozzles 4 communicated with the inside, and a water-stop plate 5 is arranged between two adjacent water nozzles 4. The cooling effect of the induction coil is improved, and multi-circle simultaneous annealing is realized.

The implementation principle of the novel butt-joint-free welded joint 2 induction coil for the induction furnace is as follows: the device achieves the purpose that the coil has no butt welding joint 2 by taking the end parts of two adjacent hollow copper pipes 6 as a water nozzle 4 for leading water to the induction coil and adopting a mode of welding the periphery of the coil, thereby reducing the phenomenon of water leakage of the coil joint. Because the welding joint 2 is not arranged, the integral rigidity of the induction coil is enhanced, the induction coil is not easy to deform, and the phenomenon of water leakage of the coil joint is avoided; the vibration phenomenon of the coil in the operation process of passing large current is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A new butt weld-free induction coil for an electric induction furnace, comprising: the water tap comprises a plurality of hollow copper tubes (6) wound into a cylindrical shape, wherein the hollow copper tubes (6) are connected in series, the pipe orifices of the two connected hollow copper tubes (6) extend outwards to form water taps (4), and non-magnetic-conductive connecting pieces are fixed at the positions of the two connected water taps (4).

2. A new butt weld-free induction coil for an induction furnace according to claim 1 wherein: the connecting piece is an aluminum alloy plate, a copper bar (7) or an insulating plate.

3. A new butt weld-free induction coil for an induction furnace according to claim 2 wherein: copper bar (7) is established to the connecting piece, copper bar (7) outsourcing sets up two water injection well choke (4) department.

4. A new butt weld joint free induction coil for an induction furnace according to claim 2 or 3 wherein: the two water nozzles (4) which are connected are mutually clung at the connecting piece.

5. A new butt weld-free induction coil for an induction furnace according to claim 2 or 3, wherein: the connector is arranged at the outer tangent of the wound cylindrical induction coil.

6. A new butt weld-free induction coil for an induction furnace according to claim 1 wherein: the two water nozzles (4) which are adjacently connected are gradually far away from the end part of the water inlet and the end part of the water outlet of the water nozzle (4) from the connecting piece.

7. A new butt weld-free induction coil for an induction furnace according to claim 3 wherein: the copper bar (7) is welded and fixed at the hollow copper tube (6).

8. A new butt weld-free induction coil for an induction furnace according to claim 1 wherein: one hollow copper pipe (6) are wound to be a plurality of circles of induction coils, the side walls of the plurality of circles of induction coils are also provided with a plurality of water nozzles (4) communicated with the inside, and a water-stop plate (5) is arranged between every two adjacent water nozzles (4).