Conductive copper shaft device of electroslag remelting furnace

Abstract

The invention relates to a conductive copper shaft device of an electroslag remelting furnace. A material rod cooling device is arranged in a material rod; a copper sleeve device is arranged on the outer side of the material rod; a copper bush device cooling device is arranged in an independent cavity formed between a waterproof copper bush of the copper bush device and an external copper shaft; the material rod cooling device and the copper sleeve device cooling device respectively form an independent cooling water path; the technical effects of high cooling efficiency and no sealing ring are achieved, and the problems that a sealing ring mechanism at the lower end of the conductive copper shaft is affected by environment such as high temperature for a long time, deteriorates and loses efficacy and is prone to water leakage, and the water cooling efficiency of single-path water circulation is low are mainly solved. The sealing reliability and the water cooling efficiency of water circulation of the conductive copper shaft device are improved, the on-site maintenance frequency and the maintenance intensity of workers are reduced, and stable operation of on-site smelting production is guaranteed.

Description

Technical Field

[0001] The embodiments of the present invention relate to a conductive copper shaft device, and in particular to a conductive copper shaft device for an electroslag remelting furnace. Background Art

[0002] The conductive copper shaft is one of the components in the electroslag remelting furnace. During operation, the surface of the copper shaft terminal fits tightly with the surface of the dummy electrode, transmitting the large current to the dummy electrode, which then transmits the large current to the consumable electrode. Since the entire conductive copper shaft has a large structure and a high current density, it works in a high-temperature environment for a long time, requiring the water circulation to have good sealing reliability and high water cooling efficiency.

[0003] The existing design of the conductive copper shaft device of the electroslag remelting furnace has a relatively complex structure at the lower end of the copper shaft, which is assembled from multiple parts, and a sealing ring mechanism is used between the parts. Since the lower end of the copper shaft is in contact with the dummy electrode, the temperature is very high, and the sealing ring will deteriorate and fail due to the influence of high temperature and other factors, and it is easy to leak. In addition, the water circulation channel adopts a single-channel water design, and the cooling water first flows into the cavity formed between the conductive copper shaft and the material rod from the water inlet at the upper end of the conductive copper shaft device, and then enters the inner core of the material rod through the return water hole at the bottom of the material rod, and finally flows out from the water outlet at the upper end. That is, the cooling of the conductive copper shaft and the material rod shares a water channel, the cooling efficiency is low, and the accumulated heat cannot be taken away in time. Therefore, the above-mentioned design structure is prone to water leakage when used for a long time in a high temperature environment, resulting in a high frequency of on-site maintenance and a high maintenance intensity for workers, and sometimes even requires major repairs, which seriously delays the on-site smelting time and affects the production progress. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a conductive copper shaft device for an electroslag remelting furnace which has high cooling efficiency and does not use a sealing ring.

[0005] In order to achieve the above object, the embodiment of the present invention designs a conductive copper shaft device for an electroslag remelting furnace, comprising:

[0006] Material rod;

[0007] A rod cooling device is provided inside the rod;

[0008] A copper sleeve device is arranged on the outside of the material rod; the copper sleeve device is used for the high current conduction of the conductive copper shaft device of the electroslag remelting furnace;

[0009] A copper sleeve device cooling device, wherein the copper sleeve device cooling device is arranged inside the copper sleeve device;

[0010] The material rod cooling device and the copper sleeve device cooling device respectively form separate cooling water circuits.

[0011] Furthermore, in the electroslag remelting furnace conductive copper shaft device of the present invention, it also includes:

[0012] A driving device is arranged above the material rod;

[0013] A material rod, fixedly connected to the driving end of the driving device;

[0014] An insulating device is arranged at the end of the copper sleeve device.

[0015] A ball lock device is provided at the end of the material rod and on the inner side of the insulating device; when the driving device drives the material rod upward, the ball lock device locks the dummy electrode to keep the dummy electrode stable.

[0016] Furthermore, in the conductive copper shaft device of the electroslag remelting furnace of the present invention, the driving device further comprises:

[0017] A clamping cylinder, which is fixed to the external copper shaft fixing flange of the copper sleeve device through four long connecting rods;

[0018] A top bracket, wherein the protruding sleeve at the upper end of the top bracket is connected to the lower end of the piston rod of the clamping cylinder, and the top bracket moves up and down together with the piston rod of the clamping cylinder; four sliding guide holes are provided on the top bracket, and the four long connecting rods pass through each of the guide holes respectively, and the top bracket slides up and down along the long connecting rods; the upper end of the material rod is connected to the bottom surface of the top bracket, and moves up and down together with the top bracket.

[0019] Furthermore, in the electroslag remelting furnace conductive copper shaft device of the present invention, the ball lock device further comprises:

[0020] A dummy electrode holder is inserted into the end of the material rod;

[0021] A dummy electrode clamping ring, which is inserted into the outer side of the dummy electrode holder;

[0022] A plurality of ceramic balls are installed on the outside of the dummy electrode holder; the dummy electrode clamping ring is sleeved on the outer cylindrical surface of the lower part of the dummy electrode holder and fits therewith; the raised part at the upper end of the dummy electrode extends into the countersunk hole at the bottom of the dummy electrode holder and is connected to the dummy electrode holder; when the dummy electrode clamping ring moves downward relative to the dummy electrode holder, it pushes the ceramic balls to lock the dummy electrode, so that the dummy electrode remains stable.

[0023] Furthermore, in the conductive copper shaft device of the electroslag remelting furnace of the present invention, the material rod cooling device further comprises:

[0024] A feed rod cooling water inlet pipe, the feed rod cooling water inlet pipe is fixed on the top end surface of the feed rod;

[0025] A feed rod cooling water return pipe, which is fixed on the top end surface of the feed rod;

[0026] The rod cooling water inlet pipe extends from the water inlet at the upper end of the rod into the bottom end of the core inside the rod; the rod cooling water flows downward through the bottom of the rod through the rod cooling water inlet pipe, then flows upward through the core cavity of the rod to the top of the rod, and is discharged from the rod cooling water return pipe.

[0027] Furthermore, in the electroslag remelting furnace conductive copper shaft device of the present invention, the copper sleeve device further includes:

[0028] A water-proof copper sleeve is sleeved on the outer side of the material rod; and an external copper shaft is sleeved on the outer side of the water-proof copper sleeve.

[0029] A copper shaft welding terminal is arranged on the outer side of the dummy electrode clamping ring;

[0030] An external copper shaft, wherein the copper shaft welding terminal is connected to the external copper shaft by welding;

[0031] A copper shaft terminal, wherein the copper shaft terminal is fixed with bolts below the copper shaft welding terminal;

[0032] Furthermore, in the electroslag remelting furnace conductive copper shaft device of the present invention, the copper sleeve device cooling device further comprises:

[0033] A copper shaft cooling water inlet pipe is fixedly connected to the outer copper shaft of the copper sleeve device;

[0034] A copper shaft cooling water return pipe is fixedly connected to the external copper shaft of the copper sleeve device;

[0035] An independent cavity is formed between the external copper shaft and the water-proof copper sleeve, and the copper shaft cooling water inlet pipe extends from the water inlet at the upper end of the external copper shaft to the bottom end of the external copper shaft; the copper shaft cooling water flows downward through the bottom of the external copper shaft through the copper shaft cooling water inlet pipe, and then flows upward to the top of the external copper shaft through an independent cavity formed between the external copper shaft and the water-proof copper sleeve, and is discharged from the copper shaft cooling return water pipe.

[0036] Furthermore, in the electroslag remelting furnace conductive copper shaft device of the present invention, the insulating device further comprises:

[0037] An upper insulating pad is provided between the upper part of the dummy electrode clamping ring and the copper shaft welding terminal;

[0038] An outer insulating pad is inserted into the outer side of the dummy electrode clamping ring;

[0039] A bottom insulating pad is fixed at the bottom of the dummy electrode clamping ring.

[0040] Furthermore, in the conductive copper shaft device of the electroslag remelting furnace described in the present invention, a cross-sectional groove is provided at the connection between the material rod and the top support, and the material rod cooling water inlet pipe and the material rod cooling water return pipe are arranged in the cross-sectional groove.

[0041] Furthermore, in the conductive copper shaft device of the electroslag remelting furnace described in the present invention, the copper shaft cooling water inlet pipe passes through the external copper shaft and enters the interior of the external copper shaft; the copper shaft cooling water return pipe passes through the external copper shaft and is connected to the outside.

[0042] Compared with the prior art, the implementation method of the present invention adopts a method of arranging a material rod cooling device inside the material rod; arranging a copper sleeve device outside the material rod; arranging a copper sleeve device cooling device inside an independent cavity formed between a water-proof copper sleeve of the copper sleeve device and an external copper shaft; the material rod cooling device and the copper sleeve device cooling device respectively form separate cooling water circuits.

[0043] The present invention can achieve a more reasonable structural design of the conductive copper shaft device. The connection combination of multiple parts at the lower end of the copper shaft adopts a welding method, and the sealing ring mechanism previously used is abandoned. No sealing ring is required, so as to avoid the problem that the sealing ring mechanism is deteriorated and fails due to long-term environmental influences such as high temperature and is easy to leak, thereby improving the sealing reliability of the water cycle; the water circulation channel of the conductive copper shaft device adopts a two-way water design, one way for the conductive copper shaft and another way for the material rod core shaft, and the two-way water circulation channels are separated by the cavity formed between the outer side of the material rod and the inner side of the water-proof copper sleeve and do not affect each other, thereby improving the water cooling efficiency of the entire device. Due to the large structure of the conductive copper shaft and the large current density, the heat accumulated at the connection of the lower end of the conductive copper shaft is very destructive to the sealing ring. Long-term use is very likely to cause leakage and requires maintenance or even overhaul, which seriously delays the on-site smelting time and production progress. The effect is remarkable in improving the sealing reliability and water cooling efficiency of the water cycle, reducing the on-site maintenance frequency and the maintenance intensity of workers, and ensuring the stable operation of on-site smelting production.

[0044] The present invention can achieve high cooling efficiency and, at the same time, does not use the technical effect of a sealing ring, and mainly solves the problem that the sealing ring mechanism at the lower end of the conductive copper shaft is deteriorated, fails, and is prone to water leakage due to long-term environmental influences such as high temperature, and the problem of low cooling efficiency of a single-circuit water circulation, so as to improve the sealing reliability and water cooling efficiency of the water circulation of the conductive copper shaft device, reduce the frequency of on-site maintenance and the maintenance intensity of workers, and ensure the stable operation of on-site smelting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0046] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0047] Figure 3 It is a structural schematic diagram of the lower half of the present invention;

[0048] Figure 4 It is a schematic diagram of the partial structure enlarged in the AA direction of the present invention;

[0049] Figure 5 It is a schematic diagram of the enlarged partial structure of the present invention along the BB axis.

[0050] In the figure: 1-clamping cylinder, 2-top bracket, 3-rod cooling water inlet pipe, 4-rod cooling water return pipe, 5-copper shaft cooling water inlet pipe, 6-copper shaft cooling water return pipe, 7-rod, 8-water-proof copper sleeve, 9-external copper shaft, 10-dummy electrode holder, 11-upper insulating pad, 12-dummy electrode clamping ring, 13-outer insulating pad, 14-bottom insulating pad, 15-copper shaft terminal, 16-dummy electrode, 17-copper shaft welding terminal, 18-cross-sectional groove, 100-rod cooling device, 200-copper sleeve device, 300-copper sleeve device cooling device, 400-driving device, 500-insulating device, 600-ball lock device. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the claims of the present application can be implemented.

[0052] The embodiment of the present invention relates to a conductive copper shaft device for an electroslag remelting furnace, such as Figures 1 to 5 As shown, including:

[0053] A rod cooling device 100 is provided inside the rod 7; the rod cooling device 100 is used to cool the inside of the rod 7;

[0054] A copper sleeve device 200 is arranged on the outer side of the lower part of the material rod 7; the copper sleeve device is used for the high current conduction function of the conductive copper shaft device of the electroslag remelting furnace in this embodiment;

[0055] A copper sleeve device cooling device 300 is provided inside the copper sleeve device 200 for cooling the copper sleeve device 200;

[0056] The rod cooling device 100 and the copper sleeve device cooling device 300 form separate cooling water circuits respectively. The water circulation channel of the conductive copper shaft device adopts a two-way water design, one water circuit for the conductive copper shaft and another water circuit for the rod core shaft, and the two water circulation channels are separated by the cavity formed between the outer side of the rod and the inner side of the water-proof copper sleeve so as not to affect each other, thereby improving the water cooling efficiency of the entire device. The present invention can achieve high cooling efficiency and, at the same time, does not use the technical effect of a sealing ring. It mainly solves the problem that the sealing ring mechanism at the lower end of the conductive copper shaft is deteriorated and fails due to long-term environmental influences such as high temperature, and is prone to water leakage, as well as the problem of low water cooling efficiency of a single-way water circulation, so as to improve the sealing reliability and water cooling efficiency of the water circulation of the conductive copper shaft device, reduce the frequency of on-site maintenance and the maintenance intensity of workers, and ensure stable operation of on-site smelting production;

[0057] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, it also includes:

[0058] A driving device 400 is arranged above the material rod 7;

[0059] The material rod 7 is fixedly connected to the driving end of the driving device 400; the driving device 400 drives the material rod 7 to move;

[0060] An insulating device 500 is provided at the end of the copper sleeve device 200. The insulating device 500 is used for insulation between the copper sleeve device 200 and the dummy electrode clamping ring 12;

[0061] The ball lock device 600 is provided at the end of the material rod 7 and on the inner side of the insulating device 500 ; when the driving device 400 drives the material rod 7 upward, the ball lock device 600 locks the dummy electrode 16 to keep the dummy electrode 16 stable.

[0062] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the driving device 400 further includes:

[0063] The clamping cylinder 1 is fixed to the external copper shaft 9 fixing flange of the copper sleeve device 200 through four long connecting rods; the clamping cylinder 1 is used to drive the top bracket 2.

[0064] The top bracket 2, the protruding sleeve at the upper end of the top bracket 2 is connected to the lower end of the piston rod of the clamping cylinder 1, and the top bracket 2 moves up and down with the piston rod of the clamping cylinder 1; four sliding guide holes are provided on the top bracket 2, and four long connecting rods pass through each guide hole respectively, and the top bracket 2 slides up and down along the long connecting rods; the upper end of the material rod 7 is connected to the bottom surface of the top bracket 2, and moves up and down with the top bracket 2.

[0065] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the ball lock device 600 further includes:

[0066] A dummy electrode holder 10 is inserted into the end of the material rod 7;

[0067] Insert the dummy electrode clamping ring 12 into the outer side of the dummy electrode holder 10;

[0068] A copper shaft welding terminal 17 is provided on the outer side of the dummy electrode clamping ring 12;

[0069] A plurality of ceramic balls are installed on the outside of the dummy electrode holder 10; the dummy electrode clamping ring 12 is on the outer cylindrical surface of the lower part of the dummy electrode holder 10 and fits therewith; the raised part at the upper end of the dummy electrode 16 extends into the countersunk hole at the bottom of the dummy electrode holder 10 to be connected to the dummy electrode holder 10; when the dummy electrode clamping ring 12 moves downward relative to the dummy electrode holder 10, it pushes the ceramic balls to lock the dummy electrode 16, so that the dummy electrode 16 remains stable.

[0070] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the rod cooling device 100 further includes:

[0071] A rod cooling water inlet pipe 3 is fixed on the top end surface of the rod 7;

[0072] A rod cooling water return pipe 4 is fixed to the top end surface of the rod 7;

[0073] The rod cooling water inlet pipe 3 extends from the water inlet at the upper end of the rod 7 to the inner bottom of the core of the rod 7; the rod cooling water flows downward through the bottom of the rod 7 through the rod cooling water inlet pipe 3, then flows upward through the core cavity of the rod 7 to the top of the material, and is discharged from the rod cooling water return pipe 4. The rod cooling water inlet pipe 3 and the rod cooling water return pipe 4 constitute a set of independent cooling water circuits.

[0074] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the copper sleeve device 200 further includes:

[0075] A water-proof copper sleeve 8 is sleeved on the outside of the material rod 7; and an external copper shaft 9 is sleeved on the outside of the water-proof copper sleeve 8.

[0076] The copper shaft welding terminal 17 is connected to the external copper shaft 9 by welding; the copper shaft welding terminal 17 is welded to the external copper shaft 9 and is not installed with a sealing ring to prevent water leakage.

[0077] The copper shaft terminal 15 is fixed with bolts below the copper shaft welding terminal 17 ; the copper shaft terminal 15 is installed below the copper shaft welding terminal 17 .

[0078] During operation, the bottom plane of the copper shaft terminal 15 of the copper sleeve device 200 is completely in contact with the surface of the dummy electrode 16. A large current is conducted from the copper sleeve device 200 to the dummy electrode 16, and then from the dummy electrode 16 to the consumable electrode, providing power for the electroslag remelting process.

[0079] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the copper sleeve device cooling device 300 further includes:

[0080] The copper shaft cooling water inlet pipe 5 is fixedly connected to the external copper shaft 9 of the copper sleeve device 200;

[0081] The copper shaft cooling water return pipe 6 is fixedly connected to the external copper shaft 9 of the copper sleeve device 200; the copper shaft cooling water inlet pipe 5 and the copper shaft cooling water return pipe 6 constitute a separate cooling water loop.

[0082] An independent cavity is formed between the external copper shaft 9 and the water-proof copper sleeve 8, and the copper shaft cooling water inlet pipe 5 extends from the water inlet at the upper end of the external copper shaft 9 to the bottom end of the external copper shaft 9; the copper shaft cooling water flows downward through the bottom of the external copper shaft 9 through the copper shaft cooling water inlet pipe 5, and then flows upward to the top of the external copper shaft through an independent cavity formed between the external copper shaft 9 and the water-proof copper sleeve 8, and is discharged by the copper shaft cooling return water pipe 6.

[0083] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the insulation device 500 further includes:

[0084] An upper insulating pad is provided between the copper shaft welding terminal 17 of the copper sleeve device 200 and the dummy electrode clamping ring 12;

[0085] An outer insulating pad 13 is inserted into the outer side of the dummy electrode clamping ring 12;

[0086] A bottom insulating pad 14 is fixed to the bottom of the dummy electrode clamping ring 12. The upper insulating pad 11, the outer insulating pad 13 and the bottom insulating pad 14 constitute the structure of the insulating device 500.

[0087] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, a cross-sectional groove 18 is provided at the connection between the material rod 7 and the top bracket 2, and a material rod cooling water inlet pipe 3 and a material rod cooling water return pipe 4 are arranged in the cross-sectional groove 18. The material rod cooling water inlet pipe 3 and the material rod cooling water return pipe 4 can extend into the interior of the material rod 7 without affecting the installation of the material rod 7.

[0088] In order to achieve the above technical effects, in the electroslag remelting furnace conductive copper shaft device in this embodiment, as Figures 1 to 5 As shown, the copper shaft cooling water inlet pipe 5 passes through the external copper shaft 9 and enters the interior of the external copper shaft 9; the copper shaft cooling water return pipe 6 passes through the external copper shaft 9 and is connected to the outside. Such a structure constitutes a cooling water loop.

[0089] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A conductive copper shaft device for an electroslag remelting furnace, characterized in that: include: Material rod; A rod cooling device is provided inside the rod; A copper sleeve device is arranged on the outer side of the material rod; The copper sleeve device is used for the high current conduction of the conductive copper shaft device of the electroslag remelting furnace; A copper sleeve device cooling device, wherein the copper sleeve device cooling device is arranged inside the copper sleeve device; The material rod cooling device and the copper sleeve device cooling device respectively form separate cooling water circuits.

2. The conductive copper shaft device for an electroslag remelting furnace according to claim 1, characterized in that: Also includes: Drive device; A driving device is arranged above the material rod; A material rod, fixedly connected to the driving end of the driving device; An insulating device is arranged at the end of the copper sleeve device. A ball lock device is provided at the end of the material rod and on the inner side of the insulating device; when the driving device drives the material rod upward, the ball lock device locks the dummy electrode to keep the dummy electrode stable.

3. The conductive copper shaft device for an electroslag remelting furnace according to claim 2, characterized in that: The driving device further comprises: A clamping cylinder, which is fixed to the external copper shaft fixing flange of the copper sleeve device through four long connecting rods; A top bracket, wherein the protruding sleeve at the upper end of the top bracket is connected to the lower end of the piston rod of the clamping cylinder, and the top bracket moves up and down together with the piston rod of the clamping cylinder; four sliding guide holes are provided on the top bracket, and the four long connecting rods pass through each of the guide holes respectively, and the top bracket slides up and down along the long connecting rods; the upper end of the material rod is connected to the bottom surface of the top bracket, and moves up and down together with the top bracket.

4. The conductive copper shaft device for an electroslag remelting furnace according to claim 2, characterized in that: The ball lock device further comprises: A dummy electrode holder is inserted into the end of the material rod; A dummy electrode clamping ring, which is inserted into the outer side of the dummy electrode holder; A plurality of ceramic balls are installed on the outside of the dummy electrode holder; the dummy electrode clamping ring is sleeved on the outer cylindrical surface of the lower part of the dummy electrode holder and fits therewith; the raised part at the upper end of the dummy electrode extends into the countersunk hole at the bottom of the dummy electrode holder and is connected to the dummy electrode holder; when the dummy electrode clamping ring moves downward relative to the dummy electrode holder, it pushes the ceramic balls to lock the dummy electrode, so that the dummy electrode remains stable.

5. The conductive copper shaft device for an electroslag remelting furnace according to claim 1, characterized in that: The rod cooling device further comprises: A feed rod cooling water inlet pipe, the feed rod cooling water inlet pipe is fixed on the top end surface of the feed rod; A feed rod cooling water return pipe, the feed rod cooling water return pipe is fixed on the top end surface of the feed rod; The rod cooling water inlet pipe extends from the water inlet at the upper end of the rod into the bottom end of the core inside the rod; the rod cooling water flows downward through the bottom of the rod through the rod cooling water inlet pipe, then flows upward through the core cavity of the rod to the top of the rod, and is discharged from the rod cooling water return pipe.

6. The conductive copper shaft device for an electroslag remelting furnace according to claim 1, characterized in that: The copper sleeve device further comprises: A water-proof copper sleeve is sleeved on the outer side of the material rod; and an external copper shaft is sleeved on the outer side of the water-proof copper sleeve. A copper shaft welding terminal is arranged on the outer side of the dummy electrode clamping ring; An external copper shaft, wherein the copper shaft welding terminal is connected to the external copper shaft by welding; The copper shaft terminal is fixed with bolts below the copper shaft welding terminal.

7. The conductive copper shaft device for an electroslag remelting furnace according to claim 1, characterized in that: The copper sleeve device cooling device also includes: A copper shaft cooling water inlet pipe is fixedly connected to the external copper shaft of the copper sleeve device; A copper shaft cooling water return pipe is fixedly connected to the external copper shaft of the copper sleeve device; An independent cavity is formed between the external copper shaft and the water-proof copper sleeve, and the copper shaft cooling water inlet pipe extends from the water inlet at the upper end of the external copper shaft to the bottom end of the external copper shaft; the copper shaft cooling water flows downward through the bottom of the external copper shaft through the copper shaft cooling water inlet pipe, and then flows upward to the top of the external copper shaft through an independent cavity formed between the external copper shaft and the water-proof copper sleeve, and is discharged from the copper shaft cooling return water pipe.

8. The conductive copper shaft device for an electroslag remelting furnace according to claim 2, characterized in that: The insulating device further comprises: An upper insulating pad is provided between the upper part of the dummy electrode clamping ring and the copper shaft welding terminal; An outer insulating pad is inserted into the outer side of the dummy electrode clamping ring; A bottom insulating pad is fixed at the bottom of the dummy electrode clamping ring.

9. The conductive copper shaft device for an electroslag remelting furnace according to claim 5, characterized in that: A cross-sectional groove is provided at the connection between the material rod and the top support, and the material rod cooling water inlet pipe and the material rod cooling water return pipe are arranged in the cross-sectional groove.

10. The conductive copper shaft device for an electroslag remelting furnace according to any one of claims 1 to 9, characterized in that: The copper shaft cooling water inlet pipe passes through the external copper shaft and enters the interior of the external copper shaft; the copper shaft cooling water return pipe passes through the external copper shaft and is connected to the outside.

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