Device for prolonging service life of cylindrical workpiece

Abstract

The invention relates to the technical field of workpiece surface treatment, and discloses a device for prolonging the service life of a cylindrical workpiece, which comprises an insulating platform, and a crystallizer supporting base is fixedly mounted at the top of the insulating platform; a to-be-cladded cylindrical part supporting stand column support is fixedly installed on the top of the insulating platform and located on the outer side of the crystallizer supporting base, a lower semi-arc bearing seat is welded to the top of the to-be-cladded cylindrical part supporting stand column support, and an upper semi-arc bearing seat is arranged on the top of the lower semi-arc bearing seat. A supporting stand column support is fixedly installed on the top of the insulating platform and located on the outer side of the to-be-clad cylindrical part supporting stand column support. According to the device for prolonging the service life of the cylindrical workpiece, the medium-frequency induction furnace and the induction heating tundish are arranged, the surface of molten steel is covered with a layer of refining covering slag to isolate air in the smelting process of the medium-frequency induction furnace, the surface of the molten steel poured into the induction heating tundish is also covered with a layer of refining covering slag, and molten steel oxidation and air suction are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece surface treatment, and particularly to a device for improving the service life of cylindrical workpieces. Background Art

[0002] A roll is the main component on a rolling mill that causes continuous plastic deformation of metal. Usually, once the working surface of the roll is worn out and fails, the entire roll will be scrapped, which will surely cause huge material waste. Among them, the roll body is the middle part of the roll that actually participates in rolling metal. The roll is the most critical equipment in the rolling process, directly affecting the production efficiency of the rolling mill, the surface quality of the rolled material, and the production cost of rolling. In the field of roll preparation, generally, two methods are used to improve the service life of the roll or realize the recycling of waste rolls, namely, cladding a high-hardness and high-wear-resistant working layer on the roll surface or repairing the surface of waste rolls, so as to achieve green, low-carbon, and circular development.

[0003] After searching, Chinese Patent CN218404409U discloses a roll laser cladding repair device. The driving member drives the two clamping plates to move along the direction of the guide groove, and the supporting member slidably connected to the clamping plate can be slidably adjusted for rolls with different end diameters. The supporting member extends into the roll to support the roll, and the two clamping plates are combined to clamp the roll. The chuck drives the roll to rotate, so that the two ends of the roll can be laser-cladded without blocking the roll ends. Moreover, the supporting member can be adjusted in real time by sliding and fixed by the locking member, meeting the support requirements for different roll structures, effectively improving the adaptability of the device to clamp the roll for laser cladding, and avoiding continuously replacing the chuck structure by adjusting the supporting member, reducing the equipment usage cost. In addition, the roll is conveyed by the moving member. After moving the roll to the guide groove, the roll is fixed between the clamping plates through the clamping member and the clamping groove, facilitating the supporting member to clamp and fix the corresponding port of the roll. Then, the laser cladding machine is moved through the three-axis transmission assembly for laser cladding, effectively improving the clamping work efficiency. Although the laser repair has the advantages of rapid cooling and solidification of the repair layer, easy to obtain fine-grained structure, and improved performance of the repair layer, it also has the disadvantages of low production efficiency and high powder preparation cost for cladding. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a device for improving the service life of cylindrical workpieces, which has the advantage of high production efficiency.

[0005] To achieve the above object of high production efficiency, the present invention provides the following technical solution: A device for improving the service life of cylindrical workpieces, including an insulating platform, on the top of which a mold support base is fixedly installed. On the top of the insulating platform and outside the mold support base, a support column bracket for the cylindrical workpiece to be clad is fixedly installed. At the top of the support column bracket for the cylindrical workpiece to be clad, a lower semi-circular bearing seat is welded. On the top of the lower semi-circular bearing seat, an upper semi-circular bearing seat is provided. On the top of the insulating platform and outside the support column bracket for the cylindrical workpiece to be clad, a support column bracket is fixedly installed. Between the lower semi-circular bearing seat and the upper semi-circular bearing seat, a shaft head of the cylindrical workpiece to be clad is installed. A cylindrical workpiece to be clad is fixedly connected to the shaft head of the cylindrical workpiece to be clad. It also includes a conductive circuit, an intermediate frequency induction furnace, an induction heating tundish, a slag-metal liquid level detection module, and an infrared thermometer. On the induction heating tundish, an adjustment component for controlling the steel liquid flow is provided. On the mold support base, a cooling component is provided. On the top of the insulating platform, a rotating device for the cylindrical workpiece to be clad is provided. On the support column bracket, a graphite carbon brush component is provided.

[0006] Further, the support column bracket for the cylindrical workpiece to be clad and the support column bracket are threadedly connected to the insulating platform through mounting bolts. The lower semi-circular bearing seat and the upper semi-circular bearing seat are installed together up and down through connecting bolts. On the outer surface of the cylindrical workpiece to be clad, a clad working outer layer is gradually clad. On the clad working outer layer, a molten pool for the outer layer to be clad is provided. The conductive circuit includes an AC power supply, a circuit control switch, and a short network cable. The AC power supply and the circuit control switch are connected by a short network cable.

[0007] Further, the intermediate frequency induction furnace includes a refractory brick at the bottom of the intermediate frequency induction furnace, a furnace shell, an induction coil, a refractory furnace lining, and an inner lining crucible. The furnace shell is fixedly installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace. The induction coil is installed in the furnace shell. The refractory furnace lining is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace and is installed on the side wall of the furnace shell. The inner lining crucible is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace and is installed on the side wall of the refractory furnace lining.

[0008] Furthermore, the induction heating tundish includes a refractory heat-insulating lining, a ladle wall, an induction heat-insulating coil, and a liquid outlet. The ladle wall is installed on the top of the refractory heat-insulating lining. The induction heat-insulating coil is installed in the ladle wall. The liquid outlet is opened on the bottom wall of the refractory heat-insulating lining. The adjusting assembly includes an extension piece, a hydraulic cylinder, a tundish sliding pipe, and a tundish immersion pipe. The extension piece is slidably connected to the bottom of the refractory heat-insulating lining. The hydraulic cylinder is fixedly installed at the bottom of the refractory heat-insulating lining. The output end of the hydraulic cylinder is fixedly installed with the extension piece. The tundish sliding pipe is fixedly installed on the side wall of the extension piece. The tundish immersion pipe is fixedly installed at the bottom of the tundish sliding pipe. The tundish sliding pipe is communicated with the liquid outlet and the tundish immersion pipe. A slide rail slidably connected to the extension piece is fixedly installed at the bottom of the refractory heat-insulating lining. The cross-sectional shape of the slide rail is an inverted T shape.

[0009] Furthermore, the cooling assembly includes a water-cooled conductive mold, a trapezoidal water-cooled mold, a bottom arc-shaped water-cooled mold, a side arc-shaped water-cooled copper mold, and an arc-shaped graphite block. The water-cooled conductive mold includes a water-cooled conductive mold flange, a conductive graphite block, a water-cooled conductive mold wall body, a water-cooled conductive mold water channel, a hexagonal bolt, and a cable connection bolt. The hexagonal bolt connects the water-cooled conductive mold flange, the conductive graphite block, and the water-cooled conductive mold wall body in a threaded connection manner. The conductive graphite block is connected to the short-circuit cable through the cable connection bolt. The water-cooled conductive mold wall body includes a mold water-cooled conductive mold copper wall, a water-cooled conductive mold water inlet, and a water-cooled conductive mold water outlet. The water-cooled conductive mold water inlet is communicated with the mold water-cooled conductive mold copper wall. The water-cooled conductive mold water outlet is communicated with the mold water-cooled conductive mold copper wall.

[0010] Furthermore, the trapezoidal water-cooled mold includes a trapezoidal water-cooled mold wall, a trapezoidal water-cooled mold water inlet, and a trapezoidal water-cooled mold water outlet. The trapezoidal water-cooled mold water inlet is communicated with the trapezoidal water-cooled mold wall. The trapezoidal water-cooled mold water outlet is communicated with the trapezoidal water-cooled mold wall. The bottom arc-shaped water-cooled mold includes a bottom arc-shaped water-cooled mold wall, a bottom arc-shaped water-cooled mold water inlet, and a bottom arc-shaped water-cooled mold water outlet. The bottom arc-shaped water-cooled mold water inlet is communicated with the bottom arc-shaped water-cooled mold wall. The bottom arc-shaped water-cooled mold water outlet is communicated with the bottom arc-shaped water-cooled mold wall. The side arc-shaped water-cooled copper mold includes a side arc-shaped water-cooled copper mold wall, a side arc-shaped water-cooled copper mold water inlet, and a side arc-shaped water-cooled copper mold water outlet. The side arc-shaped water-cooled copper mold water inlet is communicated with the side arc-shaped water-cooled copper mold wall. The side arc-shaped water-cooled copper mold water outlet is communicated with the side arc-shaped water-cooled copper mold wall.

[0011] Furthermore, the bottom arc-shaped water-cooled mold is fixedly installed on the side wall of the mold support base. The trapezoidal water-cooled mold is fixedly installed on the top of the mold support base and the bottom arc-shaped water-cooled mold. The side arc-shaped water-cooled copper mold is fixedly installed on the top of the trapezoidal water-cooled mold and is flush with the side wall of the trapezoidal water-cooled mold. The arc-shaped graphite block is embedded in the top of the trapezoidal water-cooled mold and is embedded with the side arc-shaped water-cooled copper mold. A high-temperature resistant insulating layer fixedly installed with the side arc-shaped water-cooled copper mold is fixedly installed on the top of the trapezoidal water-cooled mold. The shape of the high-temperature resistant insulating layer is in the shape of a C. The water-cooled conductive mold is fixedly installed in the inner wall of the high-temperature resistant insulating layer. The material of the high-temperature resistant insulating layer is asbestos.

[0012] Furthermore, the slag-metal liquid level detection module includes an upper slag-metal liquid level detector, a lower slag-metal liquid level detector, a function adjustment knob, a function adjustment display screen, an upper slag-metal liquid level reading, and a lower slag-metal liquid level reading. The upper slag-metal liquid level detector and the lower slag-metal liquid level detector are installed in the trapezoidal water-cooled mold. The upper slag-metal liquid level detector includes a slag-metal liquid level detector sensor, a slag-metal liquid level detector water inlet, and a slag-metal liquid level detector water outlet. The slag-metal liquid level detector water inlet and the slag-metal liquid level detector water outlet are embedded in the slag-metal liquid level detector sensor.

[0013] Furthermore, the rotating device for the cylindrical part to be clad includes a driving motor, a driving gear, and a driven gear. The driving motor is fixedly installed on the top of the insulating platform. The driving gear is fixedly installed on the output shaft of the driving motor. The driven gear is connected to the shaft head of the cylindrical part to be clad through a pin key. The driving gear and the driven gear are externally meshed.

[0014] Furthermore, the graphite carbon brush assembly includes a copper conductive block, a cylindrical copper rod, a high-purity graphite crucible-shaped carbon brush sleeve, and a spring. The copper conductive block is fixedly installed on the top of the support column bracket through a stainless steel bolt. The copper conductive block is connected to the short-circuit cable with a stainless steel bolt. The cylindrical copper rod is welded to the side wall of the copper conductive block. The high-purity graphite crucible-shaped carbon brush sleeve is sleeved on the outer surface of the cylindrical copper rod. The spring is arranged between the opposite sides of the copper conductive block and the high-purity graphite crucible-shaped carbon brush sleeve. The spring is located outside the cylindrical copper rod. The high-purity graphite crucible-shaped carbon brush sleeve abuts against the end face of the shaft head of the cylindrical part to be clad.

[0015] Compared with the prior art, the present invention provides a device for improving the service life of a cylindrical workpiece, having the following beneficial effects:

[0016] 1. The device for improving the service life of cylindrical workpieces is provided with an intermediate frequency induction furnace and an induction heating tundish. During the melting process of the intermediate frequency induction furnace, a layer of refining protective slag is covered on the surface of the molten steel to isolate air. When the molten steel is poured into the induction heating tundish, a layer of refining protective slag will also cover the surface of the molten steel, preventing the molten steel from oxidation and absorbing gas.

[0017] 2. The device for improving the service life of cylindrical workpieces is provided with an adjusting component. After the adjusting component is used, it can push the extension piece, the tundish sliding tube and the tundish immersion tube to move horizontally, thereby adjusting the opening and closing degree of the connection between the tundish sliding tube and the liquid outlet, and thus controlling the pouring speed of the molten steel for the outer layer to be cladded, achieving the control of the pouring flow rate of the molten steel.

[0018] 3. The device for improving the service life of cylindrical workpieces is provided with a cooling component. After the cooling component is used, it can respectively cool the water-cooled conductive mold, the trapezoidal water-cooled mold, the bottom arc-shaped water-cooled mold and the side arc-shaped water-cooled copper mold by passing cooling water. For the water-cooled conductive mold, the cooling water flows in through the water-cooled conductive mold water inlet and flows out through the water-cooled conductive mold water outlet. For the trapezoidal water-cooled mold, the cooling water flows in through the trapezoidal water-cooled mold water inlet and flows out through the cold mold water outlet. For the bottom arc-shaped water-cooled mold, the cooling water flows in through the bottom arc-shaped water-cooled mold water inlet and flows out through the bottom arc-shaped water-cooled mold water outlet. For the side arc-shaped water-cooled copper mold, the cooling water flows in through the side arc-shaped water-cooled copper mold water inlet and flows out through the side arc-shaped water-cooled copper mold water outlet, thus completing the cooling of the entire mold and ensuring full and comprehensive cooling.

[0019] 4. The device for improving the service life of cylindrical workpieces is provided with a slag-metal liquid level detection module. During operation, the cooling water flows in through the slag-metal liquid level detector water inlet and flows out through the slag-metal liquid level detector water outlet, thus completing the cooling of the entire sensor and ensuring its normal operation.

[0020] 5. The device for improving the service life of cylindrical workpieces is provided with a cylindrical workpiece to be cladded rotating device and a graphite carbon brush assembly. After the cylindrical workpiece to be cladded rotating device and the graphite carbon brush assembly are used, driven by the meshing transmission of the driving gear and the driven gear, they can drive the cylindrical workpiece to be cladded to rotate, gradually completing the surface cladding or repair work of cylindrical workpieces such as rolls and shafts, improving production efficiency. At the same time, under the reaction force of the spring, the high-purity graphite crucible type carbon brush sleeve can abut against the end face of the shaft head of the cylindrical workpiece to be cladded, with good contact, realizing electrical conduction. Brief Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the three-dimensional sectional view of the intermediate frequency induction furnace of the structure of the present invention;

[0023] Figure 3 This is a three-dimensional sectional view of the induction heating tundish and the adjustment component of the present invention's structure;

[0024] Figure 4 This is a three-dimensional schematic diagram of the lower part of the induction heating tundish and the adjustment component of the present invention's structure;

[0025] Figure 5 This is a three-dimensional schematic diagram of the right side of the cooling component of the present invention's structure;

[0026] Figure 6 This is a three-dimensional schematic diagram of the left side of the cooling component of the present invention's structure;

[0027] Figure 7 This is a sectional view of the water-cooled conductive mold of the present invention's structure;

[0028] Figure 8 This is a schematic diagram of the slag-metal liquid level detection module of the present invention's structure;

[0029] Figure 9 This is a three-dimensional schematic diagram of the upper slag-metal liquid level detector of the present invention's structure;

[0030] Figure 10 This is a three-dimensional sectional view of the upper slag-metal liquid level detector of the present invention's structure;

[0031] Figure 11 This is a three-dimensional schematic diagram of the rotating device for the cylindrical part to be clad and the graphite carbon brush assembly of the present invention's structure;

[0032] Figure 12 This is a three-dimensional sectional view of the graphite carbon brush assembly of the present invention's structure.

[0033] In the figure: 1 insulation platform, 2 mold support base, 3 support column bracket for the cylindrical part to be clad, 4 lower semi-circular bearing seat, 5 upper semi-circular bearing seat, 6 support column bracket, 7 shaft head of the cylindrical part to be clad, 8 cylindrical part to be clad;

[0034] 9 conductive circuit, 91 AC power supply, 92 circuit control switch, 93 short network cable;

[0035] 10 intermediate frequency induction furnace, 101 refractory brick at the bottom of the intermediate frequency induction furnace, 102 furnace shell, 103 induction coil, 104 refractory furnace lining, 105 inner crucible;

[0036] 11 induction heating tundish, 111 refractory heat-insulating furnace lining, 112 tundish wall, 113 induction heat-insulating coil, 114 liquid outlet;

[0037] 12 adjustment component, 121 extension piece, 122 hydraulic cylinder, 123 tundish sliding tube, 124 tundish immersion tube;

[0038] 13 Water-cooled conductive crystallizer, 131 Flange of water-cooled conductive crystallizer, 132 Conductive graphite block, 133 Wall body of water-cooled conductive crystallizer, 1331 Copper wall of crystallizer water-cooled conductive crystallizer, 1332 Water inlet of water-cooled conductive crystallizer, 1333 Water outlet of water-cooled conductive crystallizer, 134 Water channel of water-cooled conductive crystallizer, 135 Hexagonal bolt, 136 Cable connection bolt;

[0039] 14 Trapezoidal water-cooled crystallizer, 141 Wall of trapezoidal water-cooled crystallizer, 142 Water inlet of trapezoidal water-cooled crystallizer, 143 Water outlet of trapezoidal water-cooled crystallizer;

[0040] 15 Bottom arc-shaped water-cooled crystallizer, 151 Wall of bottom arc-shaped water-cooled crystallizer, 152 Water inlet of bottom arc-shaped water-cooled crystallizer, 153 Water outlet of bottom arc-shaped water-cooled crystallizer;

[0041] 16 Side arc-shaped water-cooled copper crystallizer, 161 Wall of side arc-shaped water-cooled copper crystallizer, 162 Water inlet of side arc-shaped water-cooled copper crystallizer, 163 Water outlet of side arc-shaped water-cooled copper crystallizer;

[0042] 17 Arc-shaped graphite block, 18 High-temperature insulating layer;

[0043] 19 Slag-metal liquid level detection module, 191 Upper slag-metal liquid level detector, 1911 Sensor of slag-metal liquid level detector, 1912 Water inlet of slag-metal liquid level detector, 1913 Water outlet of slag-metal liquid level detector, 192 Lower slag-metal liquid level detector, 193 Function adjustment knob, 194 Function adjustment display screen, 195 Upper slag-metal liquid level reading, 196 Lower slag-metal liquid level reading;

[0044] 20 Rotating device for cylindrical part to be clad, 201 Driving motor, 202 Driving gear, 203 Driven gear;

[0045] 21 Graphite carbon brush assembly, 211 Copper conductive block, 212 Cylindrical copper rod, 213 High-purity graphite crucible type carbon brush sleeve, 214 Spring;

[0046] 22 Clad working outer layer, 23 Outer layer molten pool to be clad, 24 Infrared thermometer. Specific implementation mode

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figure 1 、 Figure 11 and Figure 12, a device for improving the service life of cylindrical workpieces, including an insulating platform 1, and also including a conductive circuit 9, an intermediate frequency induction furnace 10, an induction heating tundish 11, a slag-metal liquid level detection module 19, and an infrared thermometer 24. The infrared thermometer 24 is used to monitor the temperature of the cylindrical part 8 to be clad in real time and judge the preheating condition of the cylindrical part 8 to be clad. A mold support base 2 is fixedly installed at the top of the insulating platform 1. A support column bracket 3 for the cylindrical part 8 to be clad is fixedly installed on the top of the insulating platform 1 and outside the mold support base 2. A lower semi-circular bearing seat 4 is welded to the top of the support column bracket 3 for the cylindrical part 8 to be clad. An upper semi-circular bearing seat 5 is arranged on the top of the lower semi-circular bearing seat 4. The lower semi-circular bearing seat 4 and the upper semi-circular bearing seat 5 are installed together up and down through connecting bolts. The lower semi-circular bearing seat 4 and the upper semi-circular bearing seat 5 are butt-jointed. A support column bracket 6 is fixedly installed on the top of the insulating platform 1 and outside the support column bracket 3 for the cylindrical part 8 to be clad. The support column bracket 3 for the cylindrical part 8 to be clad and the support column bracket 6 are threadedly connected to the insulating platform 1 through mounting bolts, and the support column bracket 3 for the cylindrical part 8 to be clad and the support column bracket 6 can be disassembled and assembled. A shaft head 7 of the cylindrical part 8 to be clad is installed between the lower semi-circular bearing seat 4 and the upper semi-circular bearing seat 5. The shaft head 7 of the cylindrical part 8 to be clad can rotate effectively within the lower semi-circular bearing seat 4 and the upper semi-circular bearing seat 5. A cylindrical part 8 to be clad is fixedly connected to the shaft head 7 of the cylindrical part 8 to be clad. A clad working outer layer 22 is gradually clad on the outer surface of the cylindrical part 8 to be clad. A molten pool 23 for the outer layer to be clad is provided on the clad working outer layer 22.

[0049] Please refer to Figure 1 , the conductive circuit 9 includes an AC power supply 91, a circuit control switch 92, and a short network cable 93. The AC power supply 91 is connected to the circuit control switch 92 through the short network cable 93. The circuit control switch 92 is used to control the opening and closing of the AC power supply 91.

[0050] Please refer to Figure 2 , the intermediate frequency induction furnace 10 includes a refractory brick at the bottom of the intermediate frequency induction furnace 101, a furnace shell 102, an induction coil 103, a refractory furnace lining 104, and an inner lining crucible 105. The furnace shell 102 is fixedly installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace 101. The induction coil 103 is installed in the furnace shell 102. The refractory furnace lining 104 is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace 101 and is installed on the side wall of the furnace shell 102. The inner lining crucible 105 is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace 101 and is installed on the side wall of the refractory furnace lining 104.

[0051] It should be noted that during the melting process of the molten steel for the outer layer to be clad, a layer of refining protective slag is covered on the surface of the molten steel to isolate the air, prevent the molten steel from oxidation and absorption of gas. After the intermediate frequency induction furnace 10 finishes melting the molten steel for the outer layer to be clad, the furnace is tilted and flipped, and the molten steel for the outer layer to be clad and the refining protective slag are poured into the induction heating tundish 11.

[0052] Please refer to Figure 1 and Figure 3 , the induction heating tundish 11 includes a refractory heat-insulating lining 111, a ladle wall 112, an induction heat-insulating coil 113 and a liquid outlet 114. The induction heating tundish 11 is used to keep the molten steel of the outer layer to be clad warm. The ladle wall 112 is installed on the top of the refractory heat-insulating lining 111. The induction heat-insulating coil 113 is installed in the ladle wall 112. The liquid outlet 114 is opened on the bottom wall of the refractory heat-insulating lining 111 for discharging the molten steel of the outer layer to be clad.

[0053] It should be noted that a layer of refining protective slag will also be covered on the molten steel of the outer layer to be clad and the refining protective slag poured into the induction heating tundish 11 to isolate the air.

[0054] Please refer to Figure 1 , Figure 3 and Figure 4 , an adjusting assembly 12 for controlling the steel liquid flow rate is provided on the induction heating tundish 11. The adjusting assembly 12 includes an extension piece 121, a hydraulic cylinder 122, a tundish sliding tube 123 and a tundish immersion tube 124. The extension piece 121 is slidably connected to the bottom of the refractory heat-insulating lining 111. A slide rail slidably connected to the extension piece 121 is fixedly installed at the bottom of the refractory heat-insulating lining. The slide rail has a guiding function for the extension piece 121, allowing the extension piece 121 to move only along the outer surface of the slide rail. The cross-sectional shape of the slide rail is an inverted T shape. The hydraulic cylinder 122 is fixedly installed at the bottom of the refractory heat-insulating lining 111. The output end of the hydraulic cylinder 122 is fixedly installed with the extension piece 121. When the hydraulic cylinder 122 expands and contracts, it pushes the extension piece 121 to move, gradually adjusting and controlling the flow rate of the molten steel of the outer layer to be clad.

[0055] Moreover, the tundish sliding tube 123 is fixedly installed on the side wall of the extension piece 121. The tundish sliding tube 123 can move with the extension piece 121. During the movement, the tube wall of the tundish sliding tube 123 will block a part of the liquid outlet 114, thereby controlling the flow rate of the molten steel of the outer layer to be clad. The tundish immersion tube 124 is fixedly installed at the bottom of the tundish sliding tube 123 for guiding the molten steel of the outer layer to be clad into the cooling assembly for cladding or repair. The tundish sliding tube 123 is communicated with the liquid outlet 114 and the tundish immersion tube 124.

[0056] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 7, a cooling component is provided on the mold support base 2. The cooling component includes a water-cooled conductive mold 13, a trapezoidal water-cooled mold 14, a bottom arc-shaped water-cooled mold 15, a side arc-shaped copper water-cooled mold 16, and an arc-shaped graphite block 17. The water-cooled conductive mold 13 includes a water-cooled conductive mold flange 131, a conductive graphite block 132, a water-cooled conductive mold wall 133, a water-cooled conductive mold water channel 134, a hexagon bolt 135, and a cable connection bolt 136. The hexagon bolt 135 connects the water-cooled conductive mold flange 131, the conductive graphite block 132, and the water-cooled conductive mold wall 133 in a threaded connection manner. The conductive graphite block 132 is connected to the short network cable 93 through the cable connection bolt 136. The water-cooled conductive mold wall 133 includes a mold water-cooled conductive mold copper wall 1331, a water-cooled conductive mold water inlet 1332, and a water-cooled conductive mold water outlet 1333. The water-cooled conductive mold water inlet 1332 communicates with the mold water-cooled conductive mold copper wall 1331, and the water-cooled conductive mold water outlet 1333 communicates with the mold water-cooled conductive mold copper wall 1331. Cooling water flows in from the water-cooled conductive mold water inlet 1332 and flows out from the water-cooled conductive mold water outlet 1333 through the water-cooled conductive mold water channel 134, realizing the cooling of the water-cooled conductive mold 13.

[0057] Among them, the trapezoidal water-cooled mold 14 includes a trapezoidal water-cooled mold wall 141, a trapezoidal water-cooled mold water inlet 142, and a trapezoidal water-cooled mold water outlet 143. The trapezoidal water-cooled mold water inlet 142 communicates with the trapezoidal water-cooled mold wall 141, and the trapezoidal water-cooled mold water outlet 143 communicates with the trapezoidal water-cooled mold wall 141. Cooling water flows in from the trapezoidal water-cooled mold water inlet 142 and flows out from the trapezoidal water-cooled mold water outlet 143 through the trapezoidal water-cooled mold wall 141, realizing the cooling of the trapezoidal water-cooled mold 14.

[0058] In addition, the bottom arc-shaped water-cooled mold 15 includes a bottom arc-shaped water-cooled mold wall 151, a bottom arc-shaped water-cooled mold water inlet 152, and a bottom arc-shaped water-cooled mold water outlet 153. The bottom arc-shaped water-cooled mold water inlet 152 communicates with the bottom arc-shaped water-cooled mold wall 151, and the bottom arc-shaped water-cooled mold water outlet 153 communicates with the bottom arc-shaped water-cooled mold wall 151. Cooling water flows in from the bottom arc-shaped water-cooled mold water inlet 152 and flows out from the bottom arc-shaped water-cooled mold water outlet 153 through the bottom arc-shaped water-cooled mold wall 151, realizing the cooling of the bottom arc-shaped water-cooled mold 15.

[0059] In addition, the side arc-shaped water-cooled copper mold 16 includes a side arc-shaped water-cooled copper mold wall 161, a side arc-shaped water-cooled copper mold water inlet 162, and a side arc-shaped water-cooled copper mold water outlet 163. The side arc-shaped water-cooled copper mold water inlet 162 is connected to the side arc-shaped water-cooled copper mold wall 161, and the side arc-shaped water-cooled copper mold water outlet 163 is connected to the side arc-shaped water-cooled copper mold wall 161. Cooling water flows in from the side arc-shaped water-cooled copper mold water inlet 162 and flows out from the side arc-shaped water-cooled copper mold water outlet 163 through the side arc-shaped water-cooled copper mold wall 161, realizing the cooling of the side arc-shaped water-cooled copper mold 16.

[0060] Specifically, the bottom arc-shaped water-cooled mold 15 is fixedly installed on the side wall of the mold support base 2, the trapezoidal water-cooled mold 14 is fixedly installed on the top of the mold support base 2 and the bottom arc-shaped water-cooled mold 15, the side arc-shaped water-cooled copper mold 16 is fixedly installed on the top of the trapezoidal water-cooled mold 14 and is flush with the side wall of the trapezoidal water-cooled mold 14, and the arc-shaped graphite block 17 is embedded in the top of the trapezoidal water-cooled mold 14 and is embedded with the side arc-shaped water-cooled copper mold 167, which can not only prevent the arc from occurring between the cylindrical part to be clad 8 and the copper mold during rotation but also play a lubricating role in the rotation of the cylindrical part to be clad 8 during the test. The top of the trapezoidal water-cooled mold 14 is fixedly installed with a high-temperature resistant insulating layer 18 fixedly installed with the side arc-shaped water-cooled copper mold 16. The material of the high-temperature resistant insulating layer 18 is asbestos, and the shape of the high-temperature resistant insulating layer 18 is a U-shaped. The water-cooled conductive mold 13 is fixedly installed in the inner wall of the high-temperature resistant insulating layer 18, realizing the insulation isolation between the water-cooled conductive mold 13 and the trapezoidal water-cooled mold 14.

[0061] Please refer to Figure 1 、 Figure 8 、 Figure 9 and Figure 10, the slag-metal liquid level detection module 19 includes an upper slag-metal liquid level detector 191, a lower slag-metal liquid level detector 192, a function adjustment knob 193, a function adjustment display screen 194, an upper slag-metal liquid level indication 195 and a lower slag-metal liquid level indication 196. The matching of the pouring speed of the molten outer-layer steel liquid to be clad and the rotation speed of the cylindrical part 8 to be clad is completed by the slag-metal liquid level detection module 19. The upper slag-metal liquid level detector 191 and the lower slag-metal liquid level detector 192 are installed in the trapezoidal water-cooled mold 14. The upper slag-metal liquid level detector 191 includes a slag-metal liquid level detector sensor 1911, a slag-metal liquid level detector water inlet 1912 and a slag-metal liquid level detector water outlet 1913. The slag-metal liquid level detector sensor 1911 is consistent with the curvature of the trapezoidal water-cooled mold 14, preventing resistance when the cylindrical part 8 to be clad rotates. The slag-metal liquid level detector water inlet 1912 and the slag-metal liquid level detector water outlet 1913 are embedded in the slag-metal liquid level detector sensor 1911. During operation, cooling water flows in from the slag-metal liquid level detector water inlet 1912 and flows out from the slag-metal liquid level detector water outlet 1913, thus completing the cooling of the slag-metal liquid level detector sensor 1911 and ensuring its normal operation.

[0062] Please refer to Figure 11 , a rotating device 20 for the cylindrical part to be clad is provided on the top of the insulating platform 1. The rotating device 20 for the cylindrical part to be clad includes a driving motor 201, a driving gear 202 and a driven gear 203. The driving motor 201 is fixedly installed on the top of the insulating platform 1. The driving gear 202 is fixedly installed on the output shaft of the driving motor 201. The driven gear 203 is connected to the shaft head 7 of the cylindrical part to be clad through a pin key. The driving gear 202 is externally meshed with the driven gear 203. Under the meshing transmission of the driving gear 202 and the driven gear 203, the surface cladding or repair work of cylindrical workpieces such as rolls and shafts is gradually completed, improving the production efficiency.

[0063] Please refer to Figure 12, a graphite carbon brush assembly 21 is provided on the support column bracket 6. The graphite carbon brush assembly 21 includes a copper conductive block 211, a cylindrical copper rod 212, a high-purity graphite crucible type carbon brush sleeve 213 and a spring 214. The copper conductive block 211 is fixedly installed on the top of the support column bracket 6 through a stainless steel bolt. The copper conductive block 211 is connected to the short network cable 93 by a stainless steel bolt for connecting and fixing the short network cable 93. The cylindrical copper rod 212 is welded to the side wall of the copper conductive block 211. The high-purity graphite crucible type carbon brush sleeve 213 is sleeved on the outer surface of the cylindrical copper rod 212. The high-purity graphite crucible type carbon brush sleeve 213 abuts against the end face of the shaft head 7 of the cylindrical part to be cladded. The high-purity graphite crucible type carbon brush sleeve 213 can move on the outer surface of the cylindrical copper rod 212. The spring 214 is arranged between the opposite sides of the copper conductive block 211 and the high-purity graphite crucible type carbon brush sleeve 213. Under the reaction force of the spring 214, the high-purity graphite crucible type carbon brush sleeve 213 is always pressed against the end face of the shaft head 7 of the cylindrical part to be cladded, and the two are in good contact to achieve electrical conduction. The spring 214 is located outside the cylindrical copper rod 212.

[0064] In the use of this embodiment, first, an intermediate frequency induction furnace 10 is used to smelt the electroslag metallurgy slag. After the slag liquid is completely melted and homogenized, the slag liquid is poured into the cooling assembly, and the slag liquid level is kept at a certain depth below the lower edge of the conductive graphite block 132. Then, the AC power supply 91 is turned on, and the required electrical parameters are adjusted to form a conductive loop composed of a short network cable 93, a water-cooled conductive mold 13, the electroslag metallurgy slag, the cylindrical part 8 to be clad, a graphite carbon brush assembly 21, etc. Based on the resistance heat generated by the current flowing through the electroslag metallurgy slag, the reheating and heat preservation of the slag are realized. The cylindrical part 8 to be clad is preheated through the high-temperature slag pool. An infrared thermometer 24 is installed on the upper part of the cylindrical part 8 to be clad to monitor its surface temperature in real time and judge its surface preheating condition. When the temperature of the cylindrical part 8 to be clad is preheated to near the set temperature, the molten steel to be clad and the refining protective slag melted in another intermediate frequency induction furnace 10 are poured into the induction heating tundish 11. The temperature is controlled under the action of the induction heating tundish 11. The pouring flow rate of the molten steel is controlled by the tundish sliding tube 123 at the bottom of the induction heating tundish 11. The slag-metal liquid level detection module 19 monitors the position of the slag-metal interface in the cooling assembly. When the temperature of the cylindrical part 8 to be clad is preheated to the set temperature, the hydraulic cylinder 122 contracts, the tundish sliding tube 123 is opened to communicate with the liquid outlet 114, and the molten steel of the outer layer to be clad starts to be cast. The molten steel passes through the electroslag metallurgy slag and is further refined. Through the slag-metal liquid level detection module 19, the position of the slag-metal interface in the cooling assembly is monitored. Under the action of the bottom arc-shaped water-cooled mold 15, the molten steel gradually completes the metallurgical combination with the cylindrical part 8 to be clad and solidifies. The rotating device 20 of the cylindrical part to be clad is opened, the parameters of the driving motor 201 are adjusted, the cylindrical part 8 to be clad is driven to rotate, and the ingot is withdrawn. The cylindrical part 8 to be clad that has been combined is rotated out. Based on the real-time monitoring of the slag-metal interface position, the rotation speed of the cylindrical part 8 to be clad is adjusted to match the pouring rate of the molten steel until the circumferential combination of the surface of the cylindrical part 8 to be clad is completed. At this time, the driving motor 201 is turned off to stop rotating and withdrawing the ingot, the liquid outlet 114 is closed, the pouring of the molten steel is stopped, the short network cable 93 is kept energized for three minutes and then powered off, the cooling water of the cooling assembly is turned off two hours after power off, and after the composite cylindrical workpiece is completely cooled, the composite cylindrical blank is taken out to complete the entire repair process.

[0065] The beneficial effects of the above embodiment are as follows:

[0066] For the device for improving the service life of the cylindrical workpiece, by setting the intermediate frequency induction furnace 10 and the induction heating tundish 11, a layer of refining protective slag is covered on the surface of the molten steel during the smelting process of the intermediate frequency induction furnace 10 to isolate the air, and a layer of refining protective slag will also be covered on the surface of the molten steel poured into the induction heating tundish 11 to prevent the molten steel from oxidation and gas absorption.

[0067] Moreover, by providing the adjusting component 12, after the adjusting component 12 is used, it can push the extension piece 121, the tundish sliding tube 123, and the tundish immersion tube 124 to move laterally, thereby adjusting the opening and closing degree of the connection between the tundish sliding tube 123 and the liquid outlet 114, and thus controlling the pouring speed of the molten steel for the outer layer to be clad, achieving the control of the pouring flow rate of the molten steel.

[0068] Meanwhile, by providing the cooling component, after the cooling component is used, it can respectively cool the water-cooled conductive mold 13, the trapezoidal water-cooled mold 14, the bottom arc water-cooled mold 15, and the side arc water-cooled copper mold 16 by passing cooling water. For the water-cooled conductive mold 13, the cooling water flows in through the water-cooled conductive mold water inlet 1332 and flows out through the water-cooled conductive mold water outlet 1333. For the trapezoidal water-cooled mold 14, the cooling water flows in through the trapezoidal water-cooled mold water inlet 142 and flows out through the cold mold water outlet 143. For the bottom arc water-cooled mold 15, the cooling water flows in through the bottom arc water-cooled mold water inlet 152 and flows out through the bottom arc water-cooled mold water outlet 153. For the side arc water-cooled copper mold 16, the cooling water flows in through the side arc water-cooled copper mold water inlet 162 and flows out through the side arc water-cooled copper mold water outlet 163, thereby completing the cooling of the entire mold and ensuring full and comprehensive cooling.

[0069] Not only that, by providing the slag-metal liquid level detection module 19, during operation, the cooling water flows in through the slag-metal liquid level detector water inlet 1912 and flows out through the slag-metal liquid level detector water outlet 1913, thereby completing the cooling of the entire sensor and ensuring its normal operation.

[0070] Furthermore, by providing the rotating device 20 for the cylindrical part to be clad and the graphite carbon brush assembly 21, after the rotating device 20 for the cylindrical part to be clad and the graphite carbon brush assembly 21 are used, driven by the meshing transmission of the driving gear 202 and the driven gear 203, they can drive the cylindrical part 8 to be clad to rotate, gradually completing the surface cladding or repair work of cylindrical workpieces such as rolls and shafts, improving the production efficiency. At the same time, under the reaction force of the spring 214, the high-purity graphite crucible type carbon brush sleeve 213 can abut against the end face of the shaft head 7 of the cylindrical part 8 to be clad, achieving good contact and conduction.

[0071] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0072] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for improving the service life of a cylindrical workpiece, comprising an insulating platform (1), on the top of which a mold support base (2) is fixedly installed. On the top of the insulating platform (1) and outside the mold support base (2), a support column bracket (3) for the cylindrical workpiece to be clad is fixedly installed. At the top of the support column bracket (3) for the cylindrical workpiece to be clad, a lower semi-circular bearing seat (4) is welded. On the top of the lower semi-circular bearing seat (4), an upper semi-circular bearing seat (5) is arranged. On the top of the insulating platform (1) and outside the support column bracket (3) for the cylindrical workpiece to be clad, a support column bracket (6) is fixedly installed. Between the lower semi-circular bearing seat (4) and the upper semi-circular bearing seat (5), a shaft head (7) of the cylindrical workpiece to be clad is installed. A cylindrical workpiece to be clad (8) is fixedly connected to the shaft head (7) of the cylindrical workpiece to be clad. It is characterized in that: It further comprises a conductive circuit (9), an intermediate frequency induction furnace (10), an induction heating tundish (11), a slag-metal liquid level detection module (19), and an infrared thermometer (24). On the induction heating tundish (11), an adjustment component (12) for controlling the steel liquid flow is arranged. On the mold support base (2), a cooling component is arranged. On the top of the insulating platform (1), a rotating device (20) for the cylindrical workpiece to be clad is arranged. On the support column bracket (6), a graphite carbon brush component (21) is arranged.

2. The device for improving the service life of a cylindrical workpiece according to claim 1, wherein: The support column bracket (3) for the cylindrical workpiece to be clad and the support column bracket (6) are threadedly connected to the insulating platform (1) through mounting bolts. The lower semi-circular bearing seat (4) and the upper semi-circular bearing seat (5) are mounted together up and down through connecting bolts. On the outer surface of the cylindrical workpiece to be clad (8), a clad working outer layer (22) is gradually clad. On the clad working outer layer (22), a molten pool (23) for the outer layer to be clad is provided. The conductive circuit (9) comprises an AC power supply (91), a circuit control switch (92), and a short network cable (93). The AC power supply (91) and the circuit control switch (92) are connected by the short network cable (93).

3. The device for improving the service life of a cylindrical workpiece according to claim 1, characterized in that: The intermediate frequency induction furnace (10) comprises a refractory brick at the bottom of the intermediate frequency induction furnace (101), a furnace shell (102), an induction coil (103), a refractory furnace lining (104), and an inner lining crucible (105). The furnace shell (102) is fixedly installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace (101). The induction coil (103) is installed in the furnace shell (102). The refractory furnace lining (104) is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace (101) and is installed on the side wall of the furnace shell (102). The inner lining crucible (105) is installed on the top of the refractory brick at the bottom of the intermediate frequency induction furnace (101) and is installed on the side wall of the refractory furnace lining (104).

4. A device for improving the service life of a cylindrical workpiece according to claim 1, characterized in that: The induction heating tundish (11) includes a refractory heat-insulating lining (111), a ladle wall (112), an induction heat-insulating coil (113), and a liquid outlet (114). The ladle wall (112) is installed on the top of the refractory heat-insulating lining (111). The induction heat-insulating coil (113) is installed in the ladle wall (112). The liquid outlet (114) is opened on the bottom wall of the refractory heat-insulating lining (111). The adjusting assembly (12) includes an extension member (121), a hydraulic cylinder (122), a tundish sliding tube (123), and a tundish immersion tube (124). The extension member (121) is slidably connected to the bottom of the refractory heat-insulating lining (111). The hydraulic cylinder (122) is fixedly installed at the bottom of the refractory heat-insulating lining (111). The output end of the hydraulic cylinder (122) is fixedly installed with the extension member (121). The tundish sliding tube (123) is fixedly installed on the side wall of the extension member (121). The tundish immersion tube (124) is fixedly installed at the bottom of the tundish sliding tube (123). The tundish sliding tube (123) is communicated with the liquid outlet (114) and the tundish immersion tube (124). A slide rail slidably connected to the extension member (121) is fixedly installed at the bottom of the refractory heat-insulating lining (111). The cross-sectional shape of the slide rail is an inverted T shape.

5. The device for improving the service life of a cylindrical workpiece according to claim 2, characterized in that: The cooling assembly includes a water-cooled conductive mold (13), a trapezoidal water-cooled mold (14), a bottom arc-shaped water-cooled mold (15), a side arc-shaped water-cooled copper mold (16), and an arc-shaped graphite block (17). The water-cooled conductive mold (13) includes a water-cooled conductive mold flange (131), a conductive graphite block (132), a water-cooled conductive mold wall (133), a water-cooled conductive mold water channel (134), a hexagonal bolt (135), and a cable connection bolt (136). The hexagonal bolt (135) connects the water-cooled conductive mold flange (131), the conductive graphite block (132), and the water-cooled conductive mold wall (133) in a threaded connection manner. The conductive graphite block (132) is connected to the short-circuit cable (93) through the cable connection bolt (136). The water-cooled conductive mold wall (133) includes a mold water-cooled conductive mold copper wall (1331), a water-cooled conductive mold water inlet (1332), and a water-cooled conductive mold water outlet (1333). The water-cooled conductive mold water inlet (1332) is communicated with the mold water-cooled conductive mold copper wall (1331). The water-cooled conductive mold water outlet (1333) is communicated with the mold water-cooled conductive mold copper wall (1331).

6. The device for improving the service life of a cylindrical workpiece according to claim 5, characterized in that: The trapezoidal water-cooled mold (14) includes a trapezoidal water-cooled mold wall (141), a trapezoidal water-cooled mold water inlet (142), and a trapezoidal water-cooled mold water outlet (143). The trapezoidal water-cooled mold water inlet (142) is connected to the trapezoidal water-cooled mold wall (141), and the trapezoidal water-cooled mold water outlet (143) is connected to the trapezoidal water-cooled mold wall (141). The bottom arc water-cooled mold (15) includes a bottom arc water-cooled mold wall (151), a bottom arc water-cooled mold water inlet (152), and a bottom arc water-cooled mold water outlet (153). The bottom arc water-cooled mold water inlet (152) is connected to the bottom arc water-cooled mold wall (151), and the bottom arc water-cooled mold water outlet (153) is connected to the bottom arc water-cooled mold wall (151). The side arc water-cooled copper mold (16) includes a side arc water-cooled copper mold wall (161), a side arc water-cooled copper mold water inlet (162), and a side arc water-cooled copper mold water outlet (163). The side arc water-cooled copper mold water inlet (162) is connected to the side arc water-cooled copper mold wall (161), and the side arc water-cooled copper mold water outlet (163) is connected to the side arc water-cooled copper mold wall (161).

7. The device for improving the service life of a cylindrical workpiece according to claim 5, characterized in that: The bottom arc water-cooled mold (15) is fixedly installed on the side wall of the mold support base (2). The trapezoidal water-cooled mold (14) is fixedly installed on the top of the mold support base (2) and the bottom arc water-cooled mold (15). The side arc water-cooled copper mold (16) is fixedly installed on the top of the trapezoidal water-cooled mold (14) and is flush with the side wall of the trapezoidal water-cooled mold (14). The arc-shaped graphite block (17) is embedded in the top of the trapezoidal water-cooled mold (14) and is embedded with the side arc water-cooled copper mold (16). A high-temperature resistant insulating layer (18) fixedly installed with the side arc water-cooled copper mold (16) is fixedly installed on the top of the trapezoidal water-cooled mold (14). The shape of the high-temperature resistant insulating layer (18) is in the shape of a C. The water-cooled conductive mold (13) is fixedly installed in the inner wall of the high-temperature resistant insulating layer (18). The material of the high-temperature resistant insulating layer (18) is asbestos.

8. The device for improving the service life of a cylindrical workpiece according to claim 5, wherein: The molten slag and metal liquid level detection module (19) includes an upper molten slag and metal liquid level detector (191), a lower molten slag and metal liquid level detector (192), a function adjustment knob (193), a function adjustment display screen (194), an upper molten slag and metal liquid level reading (195), and a lower molten slag and metal liquid level reading (196). The upper molten slag and metal liquid level detector (191) and the lower molten slag and metal liquid level detector (192) are installed in the trapezoidal water-cooled crystallizer (14). The upper molten slag and metal liquid level detector (191) includes a molten slag and metal liquid level detector sensor (1911), a molten slag and metal liquid level detector water inlet (1912), and a molten slag and metal liquid level detector water outlet (1913). The molten slag and metal liquid level detector water inlet (1912) and the molten slag and metal liquid level detector water outlet (1913) are embedded in the molten slag and metal liquid level detector sensor (1911).

9. The device for improving the service life of a cylindrical workpiece according to claim 1, characterized in that: The rotating device (20) for the cylindrical part to be cladded includes a driving motor (201), a driving gear (202), and a driven gear (203). The driving motor (201) is fixedly installed on the top of the insulating platform (1). The driving gear (202) is fixedly installed on the output shaft of the driving motor (201). The driven gear (203) is connected to the shaft head (7) of the cylindrical part to be cladded by a pin key. The driving gear (202) is externally meshed with the driven gear (203).

10. A device for improving the service life of a cylindrical workpiece according to claim 2, characterized in that: The graphite carbon brush assembly (21) includes a copper conductive block (211), a cylindrical copper rod (212), a high-purity graphite crucible type carbon brush sleeve (213), and a spring (214). The copper conductive block (211) is fixedly installed on the top of the support column bracket (6) by a stainless steel bolt. The copper conductive block (211) is connected to the short network cable (93) by a stainless steel bolt. The cylindrical copper rod (212) is welded to the side wall of the copper conductive block (211). The high-purity graphite crucible type carbon brush sleeve (213) is sleeved on the outer surface of the cylindrical copper rod (212). The spring (214) is arranged between the opposite sides of the copper conductive block (211) and the high-purity graphite crucible type carbon brush sleeve (213). The spring (214) is located outside the cylindrical copper rod (212). The high-purity graphite crucible type carbon brush sleeve (213) abuts against the end face of the shaft head (7) of the cylindrical part to be cladded.

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