阅读说明：本技术 一种具有电极旋转与振动功能的真空电渣炉 (Vacuum electroslag furnace with electrode rotation and vibration functions ) 是由 刘喜海 单丹阳 刘实 尚明达 于 2021-08-27 设计创作，主要内容包括：本发明涉及一种具有电极旋转与振动功能的真空电渣炉,所述电渣炉包括横臂立柱、横臂、导电料杆、气氛保护罩及结晶器,所述横臂安装在立柱之上,所述横臂一侧的横臂平台上方设有导电料杆平台及导电料杆平台升降机构,所述导电料杆平台上安装有夹持电极的导电料杆,所述导电料杆可在平台升降机构作用下穿过横臂平台上下运动,所述导电料杆杆头上设置有电极旋转机构及电极振动机构；所述气氛保护罩上端与横臂平台固定连接,所述结晶器设置在气氛保护罩下方。在电渣熔铸过程中,本发明所述电渣炉使金属熔池形状逐渐变得更加浅平,阻止钢锭出现空心,钢锭晶粒组织更加紧密细化,枝晶趋于轴向生长,为熔炼出精品电渣钢创建了良好的设备条件。(The invention relates to a vacuum electroslag furnace with electrode rotation and vibration functions, which comprises a cross arm upright post, a cross arm, a conductive material rod, an atmosphere protection cover and a crystallizer, wherein the cross arm is arranged on the upright post; the upper end of the atmosphere protection cover is fixedly connected with the cross arm platform, and the crystallizer is arranged below the atmosphere protection cover. In the electroslag casting process, the shape of a metal molten pool is gradually changed to be more shallow and flat by the electroslag furnace, so that the steel ingot is prevented from being hollow, the grain structure of the steel ingot is more compact and refined, and dendritic crystals tend to grow axially, thereby establishing good equipment conditions for smelting fine electroslag steel.)

1. A vacuum electroslag furnace with electrode rotation and vibration functions is characterized in that: a vacuum electroslag furnace with electrode rotation and vibration functions comprises a cross arm upright post, a cross arm, a conductive material rod, an atmosphere protection cover and a crystallizer, wherein the cross arm is arranged on the upright post, a conductive material rod platform and a conductive material rod platform lifting mechanism are arranged above the cross arm platform on one side of the cross arm, the conductive material rod for clamping an electrode is arranged on the conductive material rod platform, the conductive material rod can penetrate through the cross arm platform to move up and down under the action of the platform lifting mechanism, and an electrode rotating mechanism and an electrode vibration mechanism are arranged on the conductive material rod head; the upper end of the atmosphere protection cover is fixedly connected with the cross arm platform, and the crystallizer is arranged below the atmosphere protection cover.

2. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 1, wherein: the electrode rotating mechanism is arranged on the conductive material rod platform and comprises a servo motor assembly, a transmission gear and a slewing bearing; the slewing bearing is installed on the conductive material rod, a transmission gear is installed at the output shaft end of the servo motor assembly, and the transmission gear is in transmission connection with the slewing bearing.

3. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 2, wherein: the servo motor assembly comprises a servo motor and a speed reducer arranged on the servo motor, the operation of the electrode rotating mechanism is controlled by an electric control system, and the electric control system can control the servo motor to drive the speed reducer, so that the electrode rotates at a constant speed or pulsates according to the sawtooth waveform rate.

4. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 1, wherein: the electrode vibration mechanism comprises an air pressure vibrator and a thrust bearing I, the air pressure vibrator is annularly sleeved on the conductive material rod, an end plate is fixed at the upper end of the conductive material rod, and the thrust bearing I is arranged between a piston body of the air pressure vibrator and the end plate of the conductive material rod.

5. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 4, wherein: the electrode supporting frame is arranged on the conductive material rod platform and comprises a bottom plate, an intermediate plate, a top plate and a supporting column for supporting the top plate of the intermediate plate, the electrode rotating mechanism is arranged on the bottom plate, the pneumatic vibrator is arranged on the intermediate plate, a thrust bearing II is arranged between the end plate of the conductive material rod and the top plate of the electrode supporting frame, and a compression spring is further arranged on the top plate of the electrode supporting frame.

6. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 4, wherein: the electrode vibration mechanism is controlled by an electric control system, and the electric control system adjusts the reversing, the air inlet flow and the flow speed of the air pressure vibrator through the electromagnetic valve and the speed regulating valve so as to realize the frequency and amplitude modulation vibration of the electrode.

7. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 1, wherein: the conductive material rod platform lifting mechanism comprises an upright post, a motor platform, a lead screw and a servo motor assembly; the two upright posts are fixed on the cross arm platform, a slide way is arranged on the two upright posts, a motor platform is further arranged at the top ends of the two upright posts, a servo motor assembly is installed on the motor platform, a lead screw is connected to an output shaft of the servo motor assembly, a screw nut is arranged on the lead screw, the screw nut is installed on the conductive material rod platform, and the conductive material rod platform is arranged on the slide way of the support post.

8. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 1, wherein: the conductive material rod is connected with the feed short net system through the liquid metal sliding conductive device, the liquid metal sliding conductive device comprises a conductive cylinder, the conductive cylinder is sleeved on the conductive material rod, a conductive cavity is formed between the conductive cylinder and the conductive material rod, and the conductive cavity is filled with liquid metal.

9. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 8, wherein: the feed short network system comprises a conductive column fixed on the cross arm platform, a sliding sleeve is arranged on the conductive column, and the sliding sleeve is conductive through a carbon brush in the sleeve and can slide up and down along with the conductive material rod platform; and the conductive cylinder of the liquid metal sliding conductive device is connected with the sliding sleeve through a conductive copper bar.

10. The vacuum electroslag furnace with electrode rotation and vibration function as claimed in claim 1, wherein: the cross arm is a lifting cross arm and is driven to move up and down by a hydraulic system, and the cross arm platform are provided with supporting pieces for supporting the cross arm platform; a bottom water tank is arranged below the crystallizer and is arranged on the platform truck with adjustable direction.

Technical Field

The invention relates to the technical field of metallurgical equipment, in particular to a vacuum electroslag furnace with electrode rotation and vibration functions.

Background

Electroslag furnaces designed and manufactured at home and abroad generally do not have the environment of vacuum melting, and some gas-shielded electroslag furnaces can discharge a part of harmful hydrogen and oxygen gases and can not avoid oxidation reactions of some active metals. At present, in an electroslag furnace, particularly a cantilever type single-upright electroslag furnace, the upright column has poor rigidity, the lifting operation of a cross arm is unstable, if an electrode moves up and down and shakes, the electrode is easy to scrape and collide with an inner cylinder of a crystallizer under the condition that the electrode and the crystallizer are filled in a large amount, and a current short circuit accident occurs.

In addition, in the smelting process of a common electroslag furnace, metal molten drops can drop downwards at the center of an electrode, heat is concentrated in the center of a slag bath, a metal molten pool is formed into a deeper V shape, and after steel ingots are crystallized, a core structure is loose, and shrinkage cavities are easily generated. Because the molten drop forming particles are large, the dropping path is short, the non-metal harmful elements cannot be well filtered through a slag layer, so that the quality of the steel ingot is reduced, even if a few of the molten drop forming particles are provided with an electrode rotating device, the electrode rotating device only moves at a uniform speed in the electroslag casting process, metal molten drops cannot drop smoothly in time, the molten drop refining is not obvious, the removal of harmful non-metal impurities is limited, and the contribution to the improvement of the internal quality of the steel ingot is small. Most of the micro electroslag furnaces with the electrode rotating device are tested in a laboratory, the scale of several kilograms to dozens of kilograms is very small, no industrial large-scale production practice exists, and the electrode rotating technology has little significance in wide popularization in factory enterprises.

Therefore, how to improve the overall stability of the electroslag furnace equipment and enable the electrode to rotate and vibrate to adapt to the industrial production is a problem to be solved urgently.

Disclosure of Invention

The technical task of the invention is to provide a vacuum electroslag furnace with electrode rotation and vibration functions aiming at the defects of the prior art, and the vacuum electroslag furnace is suitable for industrial mass production activities of enterprises.

The technical scheme adopted by the invention for solving the technical problems is as follows: a vacuum electroslag furnace with electrode rotation and vibration functions comprises a cross arm upright post, a cross arm, a conductive material rod, an atmosphere protection cover and a crystallizer, wherein the cross arm is arranged on the upright post, a conductive material rod platform and a conductive material rod platform lifting mechanism are arranged above the cross arm platform on one side of the cross arm, the conductive material rod for clamping an electrode is arranged on the conductive material rod platform, the conductive material rod can penetrate through the cross arm platform to move up and down under the action of the platform lifting mechanism, and an electrode rotating mechanism and an electrode vibration mechanism are arranged on the conductive material rod head; the upper end of the atmosphere protection cover is fixedly connected with the cross arm platform, and the crystallizer is arranged below the atmosphere protection cover.

Further, the electroslag furnace is of a tower structure.

Furthermore, the electrode rotating mechanism is arranged on the conductive material rod platform and comprises a servo motor assembly, a transmission gear and a slewing bearing; the slewing bearing is installed on the conductive material rod, a transmission gear is installed at the output shaft end of the servo motor assembly, and the transmission gear is in transmission connection with the slewing bearing.

Furthermore, the servo motor assembly comprises a servo motor and a speed reducer arranged on the servo motor, the operation of the electrode rotating mechanism is controlled by an electric control system, and the electric control system can control the servo motor to drive the speed reducer, so that the electrode rotates at a constant speed or rotates in a pulsating mode according to the sawtooth waveform rate.

Further, the electrode vibration mechanism comprises an air pressure vibrator and a thrust bearing I, the air pressure vibrator is annularly sleeved on the conductive material rod, an end plate is fixed at the upper end of the conductive material rod, and the thrust bearing I is arranged between a piston body of the air pressure vibrator and the end plate of the conductive material rod.

Further, be provided with electrode supporting frame on the electrically conductive material pole platform, electrode supporting frame includes bottom plate, intermediate lamella, roof to and support the support post of intermediate lamella roof, electrode rotary mechanism sets up on the bottom plate, the pneumatic vibrator sets up on the intermediate lamella, be equipped with thrust bearing II between the end plate of electrically conductive material pole and the roof of electrode supporting frame, still be equipped with compression spring on the roof of electrode supporting frame.

Furthermore, the pneumatic vibrator also comprises an electromagnetic valve and a speed regulating valve which are connected with the pneumatic vibrator, the operation of the electrode vibration mechanism is controlled by an electric control system, and the electric control system adjusts the reversing, the air inlet flow and the flow speed of the pneumatic vibrator through the electromagnetic valve and the speed regulating valve so as to realize the frequency and amplitude modulation vibration of the electrodes.

Furthermore, the conductive material rod platform lifting mechanism comprises an upright post, a motor platform, a lead screw and a servo motor assembly; the two upright posts are fixed on the cross arm platform, a slide way is arranged on the two upright posts, a motor platform is further arranged at the top ends of the two upright posts, a servo motor assembly is installed on the motor platform, a lead screw is connected to an output shaft of the servo motor assembly, a screw nut is arranged on the lead screw, the screw nut is installed on the conductive material rod platform, and the conductive material rod platform is arranged on the slide way of the support post.

Further, the conductive material rod is connected with the feed short net system through the sliding conductive component.

Furthermore, the conductive material rod is connected with the feed short net system through a liquid metal sliding conductive device, the liquid metal sliding conductive device comprises a conductive cylinder, the conductive cylinder is sleeved on the conductive material rod, a conductive cavity is formed between the conductive cylinder and the conductive material rod, and the conductive cavity is filled with liquid metal.

Furthermore, the feed short network system comprises a conductive column fixed on the cross arm platform, a sliding sleeve is arranged on the conductive column, and the sliding sleeve is conductive through a carbon brush in the sleeve and can slide up and down along with the conductive material rod platform; and the conductive cylinder of the liquid metal sliding conductive device is connected with the sliding sleeve through a conductive copper bar.

Furthermore, the cross arm is a lifting cross arm and is driven to move up and down by a hydraulic system, and the cross arm platform are provided with supporting pieces for supporting the cross arm platform; a bottom water tank is arranged below the crystallizer and is arranged on the platform truck with adjustable direction.

Further, a slag feeder and an alloy feeder are arranged on the side surface of the outer cylinder of the atmosphere protection cover; the slag or alloy materials can be filled without opening the furnace cover, and the vacuum environment in the furnace is not damaged; and an oxygen concentration measuring instrument, an argon filling channel and a furnace condition inspection port are also arranged, so that the smelting work is more convenient to monitor.

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

1. the vacuum electroslag furnace with the electrode rotating and vibrating function adopts the tower-shaped structure design on the design of the furnace type main body, so that the overall stability of the equipment is obviously enhanced, and the vacuum electroslag furnace plays a decisive role in stably running the electrode rotating and vibrating device, has a super anti-tipping function by taking the slewing bearing as a basic component of the device, and adds the stability of the overall operation of the electrode rotating. On the aspect of furnace type function configuration, the device can be matched with a vacuum system, a circulating water cooling system, a hydraulic system, an oxygen concentration detection system, an inert gas conveying system, a safety production alarm system and an electric control system for electroslag furnace smelting production, and a good equipment foundation is laid for large-scale smelting of high-grade steel;

2. according to the electrode rotating and vibrating mechanism, the electrode rotating mechanism can control the servo motor to drive the speed reducer through the computer of the electric control system, so that the electrode can rotate at a constant speed and also can rotate in a pulsating mode at a sawtooth waveform rate, a consumable electrode can generate an instant pause and jitter phenomenon, metal molten drops can be dropped at an accelerated speed, molten drop particles are reduced, and the electrode vibrating mechanism is controlled through the two-position three-way electromagnetic directional valve to realize frequency modulation and amplitude modulation vibration motion of the electrode under the action of compressed air pressure. In the electroslag casting process, the electrode rotating and vibrating function of the invention enables the metal molten drops to increase the residence time and the running track of the metal molten drops in a slag pool under the action of centrifugal force, inertia force and gravity, so that the metal molten drops can be thinned and reduced, and can be dispersed and dropped in a larger range, so that harmful nonmetallic inclusions can be sufficiently removed, the shape of the metal molten pool is gradually more shallow and flat, the hollow steel ingot is prevented, the crystal grain structure of the steel ingot is more compact and refined, dendritic crystals tend to grow axially, and good equipment conditions are created for smelting fine electroslag steel; meanwhile, the changes of a melt flow field and a temperature vector field in the electroslag remelting system are caused by rotation and vibration, so that the melting rate is improved, and the energy conservation and consumption reduction are realized.

3. The sliding conductive structure commonly used in the prior art is a multipoint annular contact electric brush and a mercury type collector ring, and the multipoint annular contact electric brush has the defects that the electric brush and the slip ring are easy to wear under the long-term sliding working state, electric arcs are generated, the current transmission is influenced, the service life is short, the maintenance cost is high, and the enterprise benefit is influenced; the mercury type collector ring is small and stable in contact resistance, but mercury is toxic and can be evaporated after being heated, so that great harm is caused to human bodies. The liquid metal sliding conductive device completely overcomes the defects, ensures the normal conduction operation of the short net of the electrode rotating device, can be effectively matched with the electrode rotating device, solves the problem of electrified rotation conduction in the short net conductive loop of the electroslag casting electrode rotating device, and realizes the electrode rotation.

Drawings

FIG. 1 is a structural view of a vacuum electroslag furnace according to the present invention;

FIG. 2 is a semi-sectional view of the electrode rotating and vibrating mechanism and liquid metal sliding conductive device of the present invention;

FIG. 3 is a full sectional view of the electrode rotating and vibrating mechanism and the liquid metal sliding conductive device of the present invention;

FIG. 4 is a block diagram of a high torque conductive feed bar assembly of the rotary electrode of the present invention;

reference numerals: a cross arm upright post 1; a cross arm 2; a conductive material rod 3; an atmosphere protection cover 4; a crystallizer 5; a bottom water tank 6; a platform truck 7; a cross arm platform 8; a conductive material rod platform 9; an electrode supporting frame 10; a hydraulic system 11; a vacuum system 12; a liquid metal sliding conductive device 13; a slag feeder 14; an electronic control system 15; an electrode rotating mechanism 16; an electrode vibrating mechanism 17; a column 18; a motor platform 19 and a lead screw 20; a servo motor drive assembly 21; a conductive post 22;

clamping the oil cylinder component 3.1; the head of the conductive material rod is 3.2; a conductive material barrel body 3.3; tensioning the hanger rod 3.4; 3.5 of a clamping head; the inner and outer tooth couplings are 3.6; 3.7 of a conductive copper ring; 3.8 of an electrode; an end plate 3.9;

a base plate 10.1; an intermediate plate 10.2; a top plate 10.3; 10.4 of a support column; a compression spring 10.5;

13.1 of conductive copper bars; 13.2 of liquid metal; a conductive cylinder 13.3; a circulation water tank 13.4; a sliding sleeve 13.5;

a servo motor assembly 16.1; a slewing bearing 16.2; a coupling part 16.3; a drive pinion 16.4;

a pneumatic vibrator 17.1; a two-position three-way reversing valve 17.2; a speed regulating valve 17.3; and a thrust bearing I17.4.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in fig. 1 to 4, a vacuum electroslag furnace with electrode rotation and vibration functions, wherein the electroslag is of a tower structure and comprises a cross arm upright post 1, a cross arm 2, a conductive material rod 3, a closed atmosphere protective cover 4, a closed crystallizer 5, a bottom water tank 6 and a platform truck 7, the cross arm is installed on the upright post, a conductive material rod platform 9 and a conductive material rod platform lifting mechanism are arranged on the cross arm platform 8 on one side of the cross arm, the conductive material rod 3 for clamping an electrode 3.8 is installed on the conductive material rod platform 9, the conductive material rod can pass through the cross arm platform 8 to move up and down under the action of the conductive material rod platform lifting mechanism, and an electrode rotation mechanism 16 and an electrode vibration mechanism 17 are arranged on the conductive material rod head; the upper end of the atmosphere protection cover 4 is fixedly connected with the cross arm platform 8, and the closed atmosphere protection cover 4 is connected with the vacuum system 12 through a gas transmission pipeline, so that the vacuum pumping can be carried out in the smelting work, and the vacuum environment in the furnace is kept isolated from the atmosphere; the crystallizer 5 is arranged below the atmosphere protection cover 4; the cross arm 2 is a lifting cross arm moving on a cross arm upright post, the lifting motion of the cross arm is driven by a hydraulic system 11, a cross arm supporting platform is arranged on the cross arm and the cross arm platform, a supporting piece for stabilizing the cross arm platform is arranged on the cross arm platform, a bottom water tank 6 is arranged below the crystallizer 5, the bottom water tank is arranged on a platform car 7 with adjustable direction, the platform car 7 can be adjusted in the X-Y direction and corresponds to an electrode smelting center, and the bottom water tank can also be separated from the smelting center to perform work such as ingot removing treatment.

The electroslag furnace is of a tower structure, and an electrode rotary vibration device, a conductive material rod, a closed atmosphere protection cover, a closed crystallizer, a bottom water tank and a platform car of the electroslag furnace are arranged; the components are stacked layer by layer, like a tower.

When smelting is to be started, the hydraulic system 11 drives the cross arm, the closed atmosphere protection cover falls on the flange plane of the crystallizer, the weight of all equipment on the cross arm is strongly supported by the platform car, the bottom water tank and the crystallizer on the ground, and the cross arm is still and only moves up and down at the smelting center during smelting, so that the furnace type equipment is integrally stable, the equipment cannot shake and move integrally even if an electrode rotating and vibrating device runs, the furnace type equipment is completely suitable for electroslag smelting production operation with larger tonnage, and the whole smelting process can be smoothly carried out, so that the fundamental guarantee is achieved.

As an improvement of the technical scheme, the electrode rotating mechanism 16 is arranged on the conductive material rod platform and comprises a servo motor assembly 16.1, a slewing bearing 16.2 and a connecting part 16.3; the slewing bearing 16.2 is installed on the conductive material rod through a connecting part 16.3 (comprising a connecting disc and a connecting sleeve), a transmission pinion 16.4 is installed at the output shaft end of the servo motor assembly, and a large gear of the slewing bearing is meshed with the transmission pinion 16.4.

The electrode rotating mechanism 16 is controlled by an electric control system 15 to a servo motor component 16.1 (a servo motor and a speed reducer arranged on the servo motor), is transmitted to a big gear of a slewing bearing 16.2 through a transmission small gear 16.4 at the output shaft end of the servo motor component, and is transmitted to the conductive material rod 3 through a connecting component 16.3 to obtain the electrode rotating motion; the electric control system controls the servo motor to drive the speed reducer, so that the electrode can rotate at a constant speed or pulsate according to the sawtooth waveform rate.

As an improvement of the technical scheme, the electrode vibration mechanism 17 comprises an air pressure vibrator 17.1 and a thrust bearing I, the air pressure vibrator is annular and is sleeved on the conductive material rod, an end plate 3.9 is fixed at the upper end of the conductive material rod, the thrust bearing I17.4 is arranged on the piston body of the air pressure vibrator, an upper ring disc of the thrust bearing I is propped against the end plate, the upper and lower vibration of the air pressure vibrator can be transmitted, and in addition, the relative rotation motion of the conductive material rod is not influenced;

be provided with electrode supporting frame 10 on the electrically conductive material pole platform for to electrode rotary mechanism 16 and electrode vibration mechanism 17 supporting role, electrode supporting frame includes bottom plate 10.1, intermediate lamella 10.2, roof 10.3 to and support intermediate lamella roof support post 10.4, electrode rotary mechanism sets up on the bottom plate, the atmospheric pressure vibrator sets up on the intermediate lamella, be equipped with thrust bearing II between the end plate of electrically conductive material pole and the roof of electrode supporting frame, thrust bearing II's the roof of fitting with a contraceptive ring dish top in electrode supporting frame, still be equipped with compression spring 10.5 on the roof of electrode supporting frame.

The electrode vibration mechanism 17 further comprises a two-position three-way electromagnetic directional valve 17.2 and a speed regulating valve 17.3 which are connected with the pneumatic vibrator and mounted at the upper end of a top plate 10.3 of the electrode supporting rack of the rack, and a piston body of the pneumatic vibrator 17.1 transmits vibration to an end plate 3.9 fastened at the upper end of the conductive material rod through a thrust bearing I17.4 to drive the conductive material rod to realize electrode vibration. The electrode vibration mechanism is characterized in that an electric control system 15 controls a two-position three-way electromagnetic directional valve 17.2 to supply compressed gas to a pneumatic vibrator 17.1, the gas flow is adjusted through a speed adjusting valve 17.3, and the proper inflation speed is obtained to realize the electrode vibration movement. Because the electrode has variable-speed rotation or pulse rotation motion and is superposed with a frequency modulation and amplitude modulation vibration motion, metal molten drops generate radial flow under the comprehensive action of centrifugal force, inertia force and gravity, the metal molten drops are dispersed and dropped to the periphery, the molten drops become small and the path becomes long, when nonmetal elements in the metal molten drops pass through a slag bath solution, the probability of filtration and absorption is increased, the original elements of steel ingots are purer, and the rotating electrode electroslag remelting can effectively remove more than 50 percent of inclusions compared with the classical electroslag remelting. Due to the rotation of the electrode, the molten metal drops are evacuated earlier, the end part of the electrode becomes flat, the molten metal pool also becomes flat into a U shape, the steel ingot crystals grow axially, the texture is compact, and the steel density can be increased by 2.3%.

As an improvement of the technical scheme, the conductive material rod platform lifting mechanism comprises two upright posts 18, a motor platform 19, a screw rod 20 and a servo motor driving assembly 21; the two upright posts 18 are fixed on the cross arm platform 8, slide ways are arranged on the two upright posts, motor platforms 19 are further arranged at the top ends of the two upright posts, servo motor driving assemblies 21 are mounted on the motor platforms 19, output shafts of the servo motor driving assemblies are connected with lead screws 20, the lead screws 20 are provided with nuts, the nuts are mounted on the conductive material rod platforms 9, the conductive material rod platforms 9 are arranged on the slide ways of the two upright posts and can be lifted, and the lead screws and the nuts have small rolling contact friction coefficients, so that the conductive material rod platforms 9 are lifted very easily. The conductive material rod platform can drive the ball screw through the servo motor driving assembly, and the conductive material rods on the platform are driven by the nuts to do lifting motion to carry out smelting work.

The conductive material rod is connected with a feed short network system through a sliding conductive assembly, the sliding conductive assembly is a liquid metal sliding conductive device, as an improvement of the technical scheme, the sliding conductive assembly is a liquid metal sliding conductive device 13, the conductive material rod is connected with the feed short network system through the liquid metal sliding conductive device, the feed short network system comprises two conductive columns 22 fixed on a cross arm platform, sliding sleeves 13.5 are arranged on the conductive columns, and the sliding sleeves are conductive through carbon brushes in the sleeves and can slide up and down along with a conductive material rod platform 9; two through holes are formed in the conductive material rod platform 9, and the conductive column can penetrate through the through holes, so that the motion of the conductive material rod platform 9 is not influenced; the liquid metal sliding conductive device comprises a conductive cylinder 13.3, the conductive cylinder is sleeved on a conductive material rod, a conductive cavity is formed between the conductive cylinder and the conductive material rod 3, and liquid metal 13.2 is filled in the conductive cavity (two ends of the conductive cavity are dynamically sealed); the conductive cylinder 13.3 of the liquid metal sliding conductive device is connected with the sliding sleeve 13.5 through a conductive copper bar 13.1.

The conductive copper bar 13.1 that the conductive cylinder 13.3 couples together through sliding sleeve 13.5 and conductive pillar 22, the electric current just can be from the conductive pillar 22 of feed short net, sliding sleeve 13.5, conductive copper bar 13.1, conductive cylinder 13.3, liquid metal 13.2, on the conductive material pole 3 that can slide rotatory, form a complete conductive circuit, this liquid metal slip conductive device, overcome brush sliding ring conductive structure miscellaneous, easy wearing and tearing, short-lived, the difficult disadvantage of maintenance, thereby guarantee the normal unobstructed transmission of electric current of whole short net.

Because the liquid metal 13.2 is kept in a liquid state at normal temperature (3-1000 ℃), the liquid metal is in close contact with the conductive cylinder 13.3 and the conductive material rod 3, has no corrosion effect on the parent metal, has good conductivity, can still conduct the strong current of the feed short net 22 without damage under the condition of electrode rotation vibration, and is a very suitable scheme for electroslag remelting charged rotation conduction.

As the improvement of the technical scheme, the upper port of the closed atmosphere protection cover 4 is provided with a dynamic seal which is matched with the conductive material rod 3, so that the atmosphere invasion is isolated during the smelting work period, the cover body is provided with circulating water cooling to keep the cover body incapable of being heated and deformed, the bottom surface of the lower flange is provided with a seal groove, a seal strip is embedded in the groove, and the condition that the closed atmosphere protection cover is connected with the lower closed crystallizer 5 to prevent vacuum leakage is ensured. The side surface of the outer cylinder of the closed atmosphere protective cover 4 is also provided with a slag feeder 14 and an alloy feeder, so that slag or alloy can be filled without opening a furnace cover, the vacuum environment in the furnace is not damaged, and the timed and quantitative addition can be realized by computer control when the alloy is added. In addition, auxiliary facilities such as an oxygen concentration measuring instrument, an argon filling channel, a furnace condition observation port and the like are arranged on the side surface of the closed atmosphere protection cover 4, so that the smelting work is more convenient to monitor. The inner cylinder of the closed crystallizer 5 is made of a pure copper plate, the closed crystallizer has good heat conducting performance, the outer shell is supported by a steel cylinder and a flange, molten steel can be ensured to be gradually safely and stably solidified under the condition of circulating water cooling (realized by a water cooling system on the crystallizer), and a sealing facility is arranged on the bottom water tank 6 below the closed crystallizer to ensure that the vacuum environment is not leaked. The bottom water tank is composed of a pure copper thick plate, is supported by a steel structure water tank, is ensured not to deform when meeting high temperature by circulating water cooling, and is connected with a feed short network to form a smelting current loop so as to maintain normal smelting operation.

The uppermost end of a conductive material rod 3 (the specific structure is shown in patent CN108118159B) used by the invention is a hydraulic clamping oil cylinder component 3.1, a piston rod head extending out of the hydraulic clamping oil cylinder component passes through the head part 3.2 of the conductive material rod, the barrel body 3.3 of the conductive material rod is connected with a tensioning suspension rod 3.4, the lower end of the tensioning suspension rod 3.4 is connected with a clamping head 3.5, a clamping jaw on the clamping head 3.5 clamps a clamping handle head of an electrode 3.8, a conductive copper ring 3.7 is arranged in the middle and is responsible for conducting high current, an inner and outer tooth coupling 3.6 is arranged at a joint part of the end part of the conductive material rod and the electrode, and the torsion dislocation accident can not occur under the condition of sudden turning and sudden stopping because of the rotating motion of the electrode.

The conducting material rod 3 is internally provided with a double-layer water-cooling sleeve device, the inlet and the outlet of the double-layer water-cooling sleeve device are respectively arranged in two circulating water grooves 13.4 of a conducting cylinder 13.3, high-pressure water flows through the double-layer water-cooling sleeve device in a circulating manner, the material rod is kept from being heated and deformed and damaged due to the passing of large current, the upper end of the double-layer water-cooling sleeve device is provided with a clamping hydraulic oil cylinder, the piston rod head of the oil cylinder is connected with a tensioning suspension rod, the tensioning suspension rod passes through the inner cylinder of the rod body, the lower end of the tensioning suspension rod is connected with a clamping head, and the clamping jaw at the lower end of the clamping head clamps a clamping handle of an electrode under the pressure of the hydraulic oil, so that the stable posture of the electrode is kept in the whole smelting process. Particularly, the lower port of the conductive material rod is provided with an inner gear coupler and an outer gear coupler at the electrode connecting part, so that the connecting moment at the connecting part is increased, and the electrode failure caused by electrode rotation is effectively prevented.

The technical idea of the present invention is described in the above technical solutions, and the protection scope of the present invention is not limited thereto, and any changes and modifications made to the above technical solutions according to the technical essence of the present invention belong to the protection scope of the technical solutions of the present invention.