CN115289841B

CN115289841B - Vacuum steelmaking electric furnace

Info

Publication number: CN115289841B
Application number: CN202210914473.7A
Authority: CN
Inventors: 蒋桥兵; 赵元梅; 周钟平; 祝建仁; 张夏月; 施海建; 朱永青
Original assignee: Zhejiang Hangzhen Energy Technology Co ltd
Current assignee: Zhejiang Hangzhen Energy Technology Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2023-04-21
Anticipated expiration: 2042-08-01
Also published as: CN115289841A

Abstract

The invention provides a vacuum steelmaking electric furnace, which comprises a cabinet, a furnace body, a vacuum generating device, a smelting device and a funnel, wherein the furnace body is arranged at the top of the cabinet; according to the invention, after molten steel is poured into the inner side of the die after steelmaking, the die with molten steel poured can be automatically rotated to the position below the protective piece to perform cooling forming work, the empty die can be rotated to the position which coincides with the axis of the furnace body while rotating, and the empty die can be pressed on the bottom of the furnace body after rotating in place, so that when the cooling forming work of molten steel is performed on the previous die, the empty die can simultaneously perform new casting work of casting ingots, and smelting, cooling and casting blanking operations can be simultaneously performed, so that the smelting efficiency is greatly improved, and the smelting work can be performed in a pipelining manner.

Description

Vacuum steelmaking electric furnace

Technical Field

The invention relates to the technical field of vacuum induction melting furnaces, in particular to a vacuum steelmaking electric furnace.

Background

The vacuum induction smelting furnace forms a vacuum state in a furnace body through vacuum equipment, then the metal is melted by utilizing induction heating metal, and molten metal is poured into a die through a rotary smelting device after the metal is melted to form a metal cast ingot; the existing vacuum induction smelting furnace cannot realize continuous smelting operation, after one smelting operation is completed, an ingot needs to be waited for cooling and forming, then a die can be taken out, the ingot can be taken out, and then the die can be put into the inner side of a furnace body again for next smelting ingot work, and the operation flow is extremely time-consuming.

Accordingly, there is a need to provide a new vacuum steelmaking furnace that solves the above-mentioned problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a vacuum steelmaking electric furnace.

The invention provides a vacuum steelmaking electric furnace, which comprises a cabinet, a furnace body, a vacuum generating device, a smelting device and a funnel, wherein the furnace body is arranged at the top of the cabinet, the top of the furnace body is provided with a furnace cover, the vacuum generating device is arranged at one side of the cabinet and is communicated with the bottom of the furnace body through a pipeline, the smelting device is arranged on the side wall of the furnace body, the smelting end of the smelting device is positioned at the middle position inside the furnace body, the funnel is fixed at the lower end of the inner wall of the furnace body, the vacuum steelmaking electric furnace further comprises a supporting rotating rod, a cross supporting frame, a connecting sleeve, a mould, a switching device, a feeding device and a protecting piece, the bottom of the furnace body is in penetrating arrangement, the supporting rotating rod is rotatably connected at the top of the cabinet through a bearing, the cross supporting frame is fixed at the upper end of the supporting rotating rod, the connecting sleeve is fixed at the end of the cross supporting frame, a plurality of connecting sleeves are distributed around the supporting rotating rod in an equidistant mode, the mould is in sliding plug connection with the inner side of the connecting sleeve, one mould is in extrusion contact with the bottom of the furnace body and is communicated with the furnace body, the discharging end of the funnel is opposite to the feeding port of the mould positioned at the axis position of the furnace body, the switching device is fixed at the top of the inner side of the furnace body, and is used for driving the supporting rotating to rotate and carrying out conversion work of the mould.

Preferably, the switching device comprises a first supporting block, a worm, a first motor, a vertical rotating shaft, a first worm wheel, a driving wheel, a grooved wheel and a jacking component, wherein the plurality of first supporting blocks are sequentially fixed at the middle part of the upper surface of the cabinet along the length direction of the cabinet, the two worms are sequentially arranged at the middle part position above the cabinet along the length direction of the cabinet, both ends of the worm are rotationally connected with the first supporting block through bearings, the two worms are mutually fixed, the first motor is fixed at one side of the top of the cabinet, the end part of one worm close to one side of the first motor is fixed with the output end of the first motor, the vertical rotating shaft is rotationally connected at the top of the cabinet through bearings, the first worm wheel is fixed on the outer wall of the vertical rotating shaft, the first worm wheel is meshed with one worm close to one side of the first motor, the driving wheel is fixed at the upper end of the vertical rotating shaft, the grooved wheel is fixed at the middle part of the outer wall of the supporting rotating rod, the grooved wheel is matched with the driving wheel, and the jacking component is fixed at the top of the cabinet, and the top of the furnace body is located at the position right below.

Preferably, the jacking assembly comprises a second supporting block, a transverse rotating shaft, a second worm wheel and a cam, wherein the two second supporting blocks are symmetrically fixed on one side, close to the furnace body, of the top of the cabinet, the transverse rotating shaft is rotationally connected between the two second supporting blocks through a bearing, the second worm wheel is fixed on the outer wall of the transverse rotating shaft, the second worm wheel is meshed with a worm on one side far away from the first motor, the cam is fixed on the outer wall of the transverse rotating shaft, and the cam is in extrusion contact with the bottom of a die right above the cam.

Preferably, the outer wall of the die is fixed with limit bars at equal intervals, and the bottom of the limit bars outside the die far away from the axis of the furnace body is contacted with the top of the connecting sleeve.

Preferably, when the small radius position outside the cam rotates to be right below the furnace body, the die which is under the action of the limiting bar and is positioned above the cam slides downwards to be stopped, and the bottom of the die and the outer wall of the cam are in a separated and non-contact state.

Preferably, the top of the die is fixed with a high-temperature-resistant sealing ring.

Preferably, the feeding device comprises a charging barrel, a discharging pipe, a transverse conveying barrel, a longitudinal conveying barrel, a packing auger and a second motor, wherein the charging barrel is fixed on the outer wall of the furnace cover, the top of the charging barrel is in threaded connection with a sealing cover, the discharging pipe is fixed at the bottom of the charging barrel and penetrates through the furnace cover to extend to the inner side of the furnace cover, the outer wall of the discharging pipe is fixed with the side wall of the furnace cover, the transverse conveying barrel is fixed at the inner side of the furnace cover, the bottom of the discharging pipe is communicated with the transverse conveying barrel, the longitudinal conveying barrel is fixed at one end, far away from the discharging pipe, of the outer wall of the transverse conveying barrel, the discharge end of the longitudinal conveying barrel is right opposite to the smelting end of the smelting device, the packing auger is in the middle of the inner wall of the transverse conveying barrel in a rotating mode through a bearing, one end of the packing auger penetrates through the side wall of the transverse conveying barrel and the side wall of the furnace cover to extend to the outer side of the furnace cover, the packing auger is in contact with the side wall of the furnace cover through a rotating sealing device, the second motor is fixed on the outer wall of the furnace cover, and one end, close to the packing auger is fixed with the output end of the second motor.

Preferably, a heat radiation fan is fixed at the top of the guard.

Preferably, the two worms are identical in gauge and the first worm gear and the second worm gear are identical in gauge.

Preferably, the upper end of the funnel is arranged in an open shape, and the lower end of the funnel is arranged in an elongated tubular shape.

Compared with the related art, the vacuum steelmaking electric furnace provided by the invention has the following beneficial effects:

according to the invention, after molten steel is poured into the inner side of the die after steelmaking, the die with molten steel poured can be automatically rotated to the position below the protective piece to perform cooling forming operation, the empty die can be rotated to the position which coincides with the axis of the furnace body while rotating, and the empty die can be tightly pressed at the bottom of the furnace body after rotating in place, so that when the cooling forming operation of molten steel is performed on the previous die, the empty die can simultaneously perform new casting operation of ingots, a plurality of dies are simultaneously arranged, and when one die performs vacuum melting operation, one die performs ingot cooling forming operation, and simultaneously people can perform blanking operation on ingots formed in the other dies, so that smelting, cooling and ingot blanking operations can be simultaneously performed, the smelting efficiency is greatly improved, and the smelting operation can be performed in a pipelining manner.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the funnel position structure of the present invention;

FIG. 3 is a schematic view of the position structure of a cross support frame according to the present invention;

FIG. 4 is a schematic diagram of a switching device according to the present invention;

FIG. 5 is a schematic view of a jacking assembly according to the present invention;

FIG. 6 is a schematic view of a feeding device according to the present invention;

FIG. 7 is a second schematic view of the feeding device of the present invention;

FIG. 8 is a third schematic view of the feeding device of the present invention;

fig. 9 is a schematic diagram of a position structure of a heat dissipating fan according to the present invention.

Reference numerals in the drawings: 1. a cabinet; 2. a furnace body; 3. a furnace cover; 4. a vacuum generating device; 5. a smelting device; 6. a funnel; 7. supporting a rotating rod; 8. a cross support frame; 9. connecting sleeves; 10. a mold; 11. a switching device; 111. a first support block; 112. a worm; 113. a first motor; 114. a vertical rotating shaft; 115. a first worm wheel; 116. a driving wheel; 117. a sheave; 118. a jacking assembly; 1181. a second support block; 1182. a transverse rotating shaft; 1183. a second worm wheel; 1184. a cam; 12. a feeding device; 121. a charging barrel; 122. sealing cover; 123. discharging pipes; 124. a horizontal conveying cylinder; 125. a longitudinally arranged conveying cylinder; 126. an auger; 127. a second motor; 13. a guard; 14. a limit bar; 15. high temperature resistant sealing ring; 16. a heat radiation fan.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Specific implementations of the invention are described in detail below in connection with specific embodiments.

Referring to fig. 1, 2, 3 and 9, the vacuum steelmaking electric furnace provided by the embodiment of the invention comprises a cabinet 1, a furnace body 2, a vacuum generating device 4, a smelting device 5 and a funnel 6, wherein the furnace body 2 is arranged at the top of the cabinet 1, the top of the furnace body 2 is provided with a furnace cover 3, the vacuum generating device 4 is arranged at one side of the cabinet 1, the vacuum generating device 4 is communicated with the furnace body 2 through a pipeline, the smelting device 5 is arranged on the side wall of the furnace body 2, the smelting end of the smelting device 5 is positioned at the right middle position inside the furnace body 2, the funnel 6 is fixed at the lower end of the inner wall of the furnace body 2, the vacuum steelmaking electric furnace further comprises a supporting rotary rod 7, a cross supporting frame 8, a connecting sleeve 9, a die 10, a switching device 11, a feeding device 12 and a protecting piece 13, the bottom of the furnace body 2 is arranged in a penetrating way, the supporting rotary rod 7 is rotationally connected at the top of the cabinet 1 through a bearing, the cross support frame 8 is fixed at the upper end of supporting the bull stick 7, adapter sleeve 9 is fixed at the tip of cross support frame 8, and a plurality of adapter sleeve 9 is equidistant distribution around supporting the bull stick 7, mould 10 sliding grafting is in the inboard of adapter sleeve 9, and be located a mould 10 and the bottom extrusion contact of furnace body 2 under the furnace body 2, and it is linked together with furnace body 2, the discharge end of funnel 6 just is to the feed inlet of mould 10 in furnace body 2 axis position, switching device 11 is fixed at the top of rack 1, be used for driving supporting the bull stick 7 and rotate and carry out the conversion work of mould 10, carry out the jacking work of mould 10 simultaneously, feedway 12 is fixed at the lateral wall of bell 3, be used for carrying out the feed to smelting device 5 inboard, protector 13 is fixed at the top of rack 1, and be close to the below of protector 13 of a mould 10.

The effect of carrying out smelting work in a pipelining manner is realized, so that smelting, cooling forming and ingot casting blanking operations can be carried out simultaneously, and the smelting efficiency is greatly improved;

during the use, put into the smelting end of smelting device 5 through feedway 12 with granular metal raw materials, then carry out the evacuation work to the furnace body 2 inboard, the evacuation is accomplished and is smelted the metal raw materials through smelting device 5, smelting completion drive smelting end rotates and pour molten steel to the funnel 6 inboard, guide the molten steel to the mould 10 inboard through the funnel 6, it resets to empty completion smelting end, contact furnace body 2 inboard vacuum state, make furnace body 2 inboard atmospheric pressure the same with atmospheric pressure, then feedway 12 is supplied with the smelting end again, simultaneously switching device 11 rotationally compresses tightly the bottom at furnace body 2 with empty mould 10, the mould 10 that loads the molten steel rotates to the guard 13 below, then carry out the cooling design work of new smelting operation and preceding mould 10 simultaneously, so is reciprocal, then carry out the smelting operation of third time. The cast ingot formed by the first smelting and cooling can be fed, and the molten steel formed by the second smelting and cooling can be performed.

Referring to fig. 3 and 4, the switching device 11 includes a first supporting block 111, a worm 112, a first motor 113, a vertical rotating shaft 114, a first worm wheel 115, a driving wheel 116, a sheave 117 and a jacking component 118, wherein the plurality of first supporting blocks 111 are sequentially fixed in the middle of the upper surface of the cabinet 1 along the length direction of the cabinet 1, the two worm 112 are sequentially arranged in the middle of the upper side of the cabinet 1 along the length direction of the cabinet 1, both ends of the worm 112 are rotatably connected with the first supporting block 111 through bearings, the two worm 112 are mutually fixed, the first motor 113 is fixed on one side of the top of the cabinet 1, the end part of one worm 112 close to one side of the first motor 113 is fixed with the output end of the first motor 113, the vertical rotating shaft 114 is rotatably connected on the top of the cabinet 1 through bearings, the first worm wheel 115 is fixed on the outer wall of the vertical rotating shaft 114, the sheave 117 is fixed on the middle of the outer wall of the supporting the rotating rod 7 along the length direction of the cabinet 1, the sheave 117 is matched with the driving wheel 116, and the sheave 117 is fixed on the top of the cabinet 1, which is located under the top of the cabinet 2.

Referring to fig. 5, the jacking assembly 118 includes a second supporting block 1181, a transverse rotating shaft 1182, a second worm wheel 1183 and a cam 1184, wherein the two second supporting blocks 1181 are symmetrically fixed at one side of the top of the cabinet 1 close to the furnace body 2, the transverse rotating shaft 1182 is rotatably connected between the two second supporting blocks 1181 through a bearing, the second worm wheel 1183 is fixed at the outer wall of the transverse rotating shaft 1182, the second worm wheel 1183 is meshed with one worm 112 far away from one side of the first motor 113, the cam 1184 is fixed at the outer wall of the transverse rotating shaft 1182, and the cam 1184 is in extrusion contact with the bottom of the mold 10 located right above the cam 1184.

When the mold is used, the first motor 113 is driven to rotate to drive the two worms 112 to rotate simultaneously, one worm 112 close to one side of the first motor 113 rotates to drive the first worm wheel 115 to rotate, the first worm wheel 115 rotates to drive the vertical rotating shaft 114 to drive the driving wheel 116 to rotate, the first motor 113 rotates to drive the driving wheel 116 to rotate for one circle and then immediately stops rotating, the grooved wheel 117 is driven to rotate for 90 degrees, the supporting rotating rod 7 is driven to rotate for 90 degrees, the empty mold 10 rotates to the lower part of the furnace body 2, and the mold 10 loaded with molten steel rotates to the lower part of the protecting piece 13;

while the first worm wheel 115 rotates, the second worm wheel 1183 is also driven to rotate, so as to drive the transverse rotating shaft 1182 to rotate, thereby driving the cam 1184 to rotate, and the driving wheel 116 rotates one circle, the same cam 1184 rotates one circle, after rotating a certain angle from an initial state, one die 10 overlapped with the axis of the furnace body 2 gradually slides downwards, and finally, after rotating the lower radius part of the periphery of the cam 1184 to be right below the furnace body 2, the cam 1184 continuously rotates, and the outer wall of the cam 1184 is separated from the bottom of the die 10 and is not contacted with the bottom of the die 10;

the operation flow is divided into three stages: firstly, the method comprises the following steps of; when the driving wheel 116 starts to rotate with the stirring grooved wheel 117 from an initial state, the grooved wheel 117 is not moved at this stage, the cam 1184 rotates at the same speed as the driving wheel 116, the large radius of the periphery of the cam 1184 gradually deviates from the bottom of the die 10, and finally, when the driving wheel 116 starts to rotate with the stirring grooved wheel 117, the cam 1184 rotates until the outer side of the small radius of the cam 1184 is positioned at the position right below the die 10, and when the outer side of the small radius of the cam 1184 is positioned right below the die 10, the die 10 is lowered into place due to the loss of support;

next: the driving wheel 116 starts to stir the rotation of the grooved wheel 117 to the rotation ending stage of the grooved wheel 117, the cam 1184 continuously rotates, the small-radius outer wall of the cam 1184 is separated from the bottom of the die 10, and the grooved wheel 117 rotates to enable the four dies 10 to simultaneously rotate to switch the stations;

finally: the driving wheel 116 is rotated from the end of the grooved wheel 117 to the reset stage of the driving wheel 116, the four moulds 10 are switched to the end of the working position, the driving wheel 116 continuously rotates to reset, the cam 1184 simultaneously continuously rotates, the large-radius periphery of the cam 1184 finally rotates to be in contact with the moulds 10, and the cam 1184 is reset, and the moulds 10 are abutted against the bottom of the furnace body 2 through the abutting of the cam 1184;

referring to fig. 3, the outer wall of the die 10 is fixed with a limit bar 14 at equal distance, and the bottom of the limit bar 14 outside the die 10 far from the axis of the furnace body 2 contacts with the top of the connecting sleeve 9, so that the position of the die 10 can be defined.

Referring to fig. 3, when the small radius position of the outer side of the cam 1184 rotates to be right below the furnace body 2, the mold 10 above the cam 1184 under the action of the limit bar 14 slides down to be stopped, the bottom of the mold 10 is in a separated and non-contact state with the outer wall of the cam 1184, so that after the cam 1184 rotates to separate the large radius part of the periphery from the mold 10, the switching operation of the mold 10 is not blocked by the cam 1184, and the mold 10 can be switched smoothly.

Referring to fig. 3, a high temperature resistant sealing ring 15 is fixed on the top of the mold 10, so as to improve the air tightness of the junction between the mold 10 and the furnace body 2.

Referring to fig. 6, 7 and 8, the feeding device 12 includes a feeding tube 121, a discharging tube 123, a horizontal conveying tube 124, a vertical conveying tube 125, an auger 126 and a second motor 127, wherein the feeding tube 121 is fixed on the outer wall of the furnace cover 3, the top of the feeding tube 121 is in threaded connection with a sealing cover 122, the discharging tube 123 is fixed at the bottom of the feeding tube 121, the discharging tube 123 extends to the inner side of the furnace cover 3 through the furnace cover 3, the outer wall of the discharging tube 123 is fixed with the side wall of the furnace cover 3, the horizontal conveying tube 124 is fixed at the inner side of the furnace cover 3, the bottom of the discharging tube 123 is communicated with the horizontal conveying tube 124, the vertical conveying tube 125 is fixed at one end of the outer wall of the horizontal conveying tube 124 far away from the feeding tube 123, the discharge end of the vertical conveying tube 125 is opposite to the smelting end of the smelting device 5, the auger 126 is connected to the middle of the inner wall of the horizontal conveying tube 124 through a bearing in a rotating manner, one end of the auger 126 extends to the outer side of the furnace cover 3 through the side wall of the horizontal conveying tube 124 and the side wall of the furnace cover 124, a contact part of the auger 126 and the furnace cover 3 is connected with the side wall of the motor through the rotating sealing device to the side wall of the side of the cover 3, the motor is fixed at the second end 127 near the second end 127 of the outer wall of the furnace cover 3 is fixed to the second end 127.

The feeding device 12 can perform automatic feeding work, the sealing cover 122 can be manually opened in the early stage of the work, the raw materials which are in the shape of beads can be put into the inner side of the charging barrel 121, the sealing cover 122 is screwed after feeding is finished, then when feeding work is performed to the smelting end of the smelting device 5, the second motor 127 is driven to rotate, the auger 126 is driven to rotate, the raw materials in the charging barrel 121 fall into the inner side of the transverse conveying barrel 124, are conveyed to the inner side of the longitudinal conveying barrel 125 under the conveying of the auger 126, then fall into the smelting end of the smelting device 5 to perform smelting work, and the second motor 127 is stopped to rotate after the primary feeding is finished.

Referring to fig. 9, a cooling fan 16 is fixed on the top of the guard 13, so as to cool the molten steel inside the mold 10 below the guard 13, thereby accelerating the ingot molding.

Referring to fig. 4 and 5, the two worms 112 have the same specification, and the first worm wheel 115 and the second worm wheel 1183 have the same specification, so that the cam 1184 can rotate at the same speed as the driving wheel 116.

Referring to fig. 2, the upper end of the funnel 6 is open, and the lower end of the funnel 6 is elongated and tubular, so that the steel solution can flow into the inner side of the mold 10.

The circuits and control involved in the present invention are all of the prior art, and are not described in detail herein.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A vacuum steelmaking electric furnace comprising:

a cabinet (1);

the furnace body (2), the furnace body (2) is installed at the top of the cabinet (1), and the furnace cover (3) is installed at the top of the furnace body (2);

the vacuum generating device (4) is arranged on one side of the cabinet (1), and the vacuum generating device (4) is communicated with the furnace body (2) through a pipeline;

the smelting device (5) is arranged on the side wall of the furnace body (2), and the smelting end of the smelting device (5) is positioned at the middle position inside the furnace body (2);

the funnel (6) is fixed at the lower end of the inner wall of the furnace body (2);

characterized in that it also comprises;

the bottom of the furnace body (2) is arranged in a penetrating way;

the support rotating rod (7) is rotatably connected to the top of the cabinet (1) through a bearing;

the cross support frame (8) is fixed at the upper end of the support rotating rod (7);

the connecting sleeves (9) are fixed at the end parts of the cross support frames (8), and the connecting sleeves (9) are distributed in an equidistant manner around the support rotating rods (7);

the mould (10) is in sliding connection with the inner side of the connecting sleeve (9), one mould (10) positioned right below the furnace body (2) is in extrusion contact with the bottom of the furnace body (2) and is communicated with the furnace body (2), and the discharge end of the funnel (6) is opposite to the feed inlet of the mould (10) positioned on the axis of the furnace body (2);

the switching device (11) is fixed at the top of the cabinet (1) and used for driving the supporting rotating rod (7) to rotate to perform the conversion work of the die (10) and simultaneously perform the jacking work of the die (10);

a feeding device (12), wherein the feeding device (12) is fixed on the side wall of the furnace cover (3) and is used for feeding the inner side of the smelting device (5);

the protection piece (13), the protection piece (13) is fixed at the top of the cabinet (1), and one mould (10) close to the protection piece (13) is located below the protection piece (13).

2. A vacuum steelmaking furnace as claimed in claim 1, wherein said switching means (11) comprises:

the first support blocks (111), a plurality of the first support blocks (111) are sequentially fixed in the middle of the upper surface of the cabinet (1) along the length direction of the cabinet (1);

the two worms (112) are sequentially arranged at the middle position above the cabinet (1) along the length direction of the cabinet (1), two ends of each worm (112) are rotationally connected with the first supporting block (111) through bearings, and the two worms (112) are mutually fixed;

the first motor (113), the first motor (113) is fixed on one side of the top of the cabinet (1), and the end part of one worm (112) close to one side of the first motor (113) is fixed with the output end of the first motor (113);

the vertical rotating shaft (114), the vertical rotating shaft (114) is rotatably connected to the top of the cabinet (1) through a bearing;

the first worm wheel (115), the first worm wheel (115) is fixed on the outer wall of the vertical rotating shaft (114), and the first worm wheel (115) is meshed and connected with one worm (112) close to one side of the first motor (113);

the driving wheel (116), the said driving wheel (116) is fixed on the upper end of the vertical spindle (114);

the grooved pulley (117) is fixed in the middle of the outer wall of the supporting rotating rod (7), and the grooved pulley (117) is matched with the driving wheel (116);

the jacking assembly (118) is fixed on the top of the cabinet (1) and is positioned at the position right below the furnace body (2).

3. The vacuum steelmaking electric furnace as set forth in claim 2 wherein said jacking assembly (118) includes:

the two second support blocks (1181) are symmetrically fixed on one side, close to the furnace body (2), of the top of the cabinet (1);

the transverse rotating shaft (1182), wherein the transverse rotating shaft (1182) is rotatably connected between the two second supporting blocks (1181) through a bearing;

the second worm wheel (1183), the said second worm wheel (1183) is fixed on the outer wall of the horizontal spindle (1182), and the second worm wheel (1183) is connected with a worm (112) far away from one side of the said first electrical machinery (113) in a meshed manner;

and the cam (1184) is fixed on the outer wall of the transverse rotating shaft (1182), and the cam (1184) is in extrusion contact with the bottom of the die (10) right above the cam (1184).

4. A vacuum steelmaking furnace as claimed in claim 3, wherein the outer wall of the mould (10) is fixed with limit bars (14) equidistantly, and the bottom of the limit bars (14) outside the mould (10) away from the axis of the furnace body (2) is in contact with the top of the connecting sleeve (9).

5. The electric vacuum steelmaking furnace as claimed in claim 4, wherein the bottom of the die (10) above the cam (1184) is in a separated non-contact state with the outer wall of the cam (1184) when the die is slid down to a stop by the stopper (14) when the small radius position outside the cam (1184) rotates to be located right below the furnace body (2).

6. Vacuum steelmaking electric furnace according to claim 1, characterized in that the top of the mould (10) is fixed with a high temperature resistant sealing ring (15).

7. The vacuum steelmaking electric furnace as claimed in claim 1, characterized in that said feeding means (12) comprise:

the charging barrel (121) is fixed on the outer wall of the furnace cover (3), and the top of the charging barrel (121) is connected with a sealing cover (122) in a threaded manner;

the blanking pipe (123) is fixed at the bottom of the charging barrel (121), the blanking pipe (123) penetrates through the furnace cover (3) and extends to the inner side of the furnace cover (3), and the outer wall of the blanking pipe (123) is fixed with the side wall of the furnace cover (3);

the transverse conveying cylinder (124) is fixed on the inner side of the furnace cover (3), and the bottom of the blanking pipe (123) is communicated with the transverse conveying cylinder (124);

the vertical conveying cylinder (125), the vertical conveying cylinder (125) is fixed at one end of the outer wall of the horizontal conveying cylinder (124) far away from the blanking pipe (123), and the discharging end of the vertical conveying cylinder (125) is opposite to the smelting end of the smelting device (5);

the auger (126) is rotationally connected to the middle part of the inner wall of the transverse conveying cylinder (124) through a bearing, one end of the auger (126) penetrates through the side wall of the transverse conveying cylinder (124) and the side wall of the furnace cover (3) to extend to the outer side of the furnace cover (3), and the contact part of the auger (126) and the furnace cover (3) is rotationally connected with the side wall of the furnace cover (3) through a rotary sealing device;

the second motor (127), the outer wall at bell (3) is fixed to second motor (127), and auger (126) are close to the one end of second motor (127) and the output of second motor (127) is fixed.

8. Vacuum steelmaking electric furnace according to claim 1, characterized in that said shield (13) has a radiator fan (16) fixed to the top thereof.

9. A vacuum steelmaking furnace according to claim 3, wherein the two worms (112) are of the same gauge and the first worm wheel (115) and the second worm wheel (1183) are of the same gauge.

10. The vacuum steelmaking electric furnace as claimed in claim 1, characterized in that the upper end of said funnel (6) is provided in an open shape, and the lower end of said funnel (6) is provided in an elongated tubular shape.