A vacuum arc remelting furnace

Abstract

The invention discloses a vacuum arc remelting furnace, which relates to the technical field of arc furnaces, and comprises a lower base for supporting the device, wherein a main bracket is fixedly mounted on the lower base, a furnace shell is slidably mounted on the main bracket, a lower electrode is slidably mounted in the furnace shell, an end of the furnace shell away from the lower base is contacted with a closed box, a closed cover is fixedly mounted in the closed box, the closed cover, the furnace shell and the lower electrode form a furnace chamber, a flow outlet is also fixedly mounted on the end of the furnace shell close to the closed cover, one end of the flow outlet leads to the furnace chamber, and the other end of the flow outlet leads to a collecting trough, the device changes the storage size of the furnace chamber by adjusting the position of the lower electrode, so that the device can smelt metal materials of different weights, and the device allows the molten metal to flow out of the device by moving the furnace shell, so that the high-temperature waste slag at the bottom of the furnace chamber can be separated from the molten metal, thereby improving the quality of the smelted metal.

Description

Technical Field

[0001] The invention relates to the technical field of arc melting furnaces, and in particular to a vacuum arc remelting furnace. Background Art

[0002] A vacuum arc remelting furnace is a metallurgical equipment that remelts metals in a vacuum or protective atmosphere. In order to obtain high-temperature alloys, titanium zirconium and their alloys with higher fatigue resistance and fracture toughness, it is necessary to improve the cleanliness of ingots produced by standard air melting or vacuum induction melting and optimize the structure of the ingots. The principle of the equipment is to use the high temperature of a DC arc to melt the electrode metal, and remelt these ingots in a vacuum environment to remove dissolved gases (hydrogen, nitrogen, carbon monoxide, etc.), and use high steam pressure to reduce unnecessary trace elements, so as to achieve directional crystallization of the ingot from the bottom to the top, avoid macro-segregation, and reduce micro-segregation. When working, the vacuum arc furnace contacts the dissolved metal through graphite electrodes, thereby generating resistance to generate high temperature and melt the metal.

[0003] A Chinese invention patent with publication number CN105624419A discloses a vacuum arc remelting furnace, including a movable furnace head and a static melting station. During the melting process of the vacuum melting furnace using this device, an electric current passes through a cable wound on the outer surface of a stainless steel water-cooling jacket of the static melting station, thereby generating a magnetic field, exerting a lateral force on the metal being melted in the melting chamber, thereby achieving artificial control of the magnetic field stirring in the melting chamber, improving the melting accuracy, and increasing the available amount of the product.

[0004] In the prior art, due to the difference in metal processing conditions and the weight of metal materials used during processing, too much smelting space is wasted during the smelting process, which in turn reduces the processing efficiency of the furnace. At the same time, the high temperature generated by the electric arc during the smelting process will cause the temperature of the graphite electrode to rise rapidly. When the temperature of the graphite electrode is too high, the service life of the graphite electrode will be reduced, which will cause the graphite electrode to become a consumable material in the arc remelting furnace. At the same time, when the temperature of the graphite electrode exceeds the rated operating temperature, due to the good conductivity of the graphite electrode, the temperature in the furnace will be transferred to the outside of the furnace, and the cables or other devices directly connected to the graphite electrodes will have the risk of overheating or melting. Therefore, when the graphite electrode is working, it is necessary to cool down in time to ensure the safety of the production process and equipment. Summary of the invention

[0005] In view of the above technical problems, the present invention provides the following technical solutions:

[0006] The cam is connected with the lower frame by the upper frame, and the lower frame is connected with the lower frame by the upper frame, and the lower frame is connected with the lower frame by the upper frame.

[0007] Furthermore, the sealed cover is provided with a plurality of electrode through holes, a protective ring strip is provided on one side of the sealed cover in the closed box, a plurality of blocking blocks are slidably installed in the protective ring strip, a closing spring is provided on the blocking block, the other end of the closing spring is fixedly installed on the protective ring strip, and a plurality of driving cylinders are fixedly installed on the main bracket.

[0008] Furthermore, a driving plate is fixedly mounted on the movable end of the driving cylinder, and a plurality of upper electrodes are fixedly mounted on the driving plate. The upper electrodes are slidably connected to the main bracket, and one end of the upper electrode away from the driving plate is arranged in the furnace chamber. The upper electrode enters the furnace chamber through the electrode through hole on the sealed cover, and the upper electrode contacts the blocking block in the closed box.

[0009] Furthermore, a vacuum tube head is fixedly installed in the closed box, and the vacuum tube head is used to extract the gas in the closed box and the furnace chamber. A transfer box is fixedly installed at one end of the vacuum tube head outside the closed box, and a vacuum pump for generating negative pressure is fixedly installed at one end of the transfer box away from the vacuum tube head.

[0010] Furthermore, the transfer box is connected to the vacuum pump through an air intake pipe. A cooling box for cooling and purifying exhaust gas is fixedly installed on the outer wall of the vacuum pump. An exhaust gas pipe is fixedly installed on the cooling box. The other end of the exhaust gas pipe is fixedly installed on the exhaust pipe of the vacuum pump.

[0011] Furthermore, a plurality of sealed heat dissipation blocks for cooling are fixedly installed in the closed box, a plurality of flow pipes are arranged in the sealed heat dissipation block, a collecting pipe is fixedly installed on the outer wall of the sealed heat dissipation block, a refrigeration box is fixedly installed on the collecting pipe, and the refrigeration box is fixedly connected to the outer wall of the closed box.

[0012] Furthermore, a delivery pipe is fixedly installed on the water inlet pipe of the refrigeration box, and the other end of the delivery pipe is fixedly connected to the sealed heat dissipation block. A plurality of cooling channels are arranged in the sealed heat dissipation block, and coolant is arranged in the sealed heat dissipation block, the collecting pipe, the delivery pipe and the refrigeration box.

[0013] Furthermore, a furnace shell for isolation and protection is slidably installed in the main support, a lower cooling cylinder is fixedly installed outside the furnace shell, a lower cooling pipe is fixedly installed outside the lower cooling cylinder, a heat exchanger is fixedly installed at the other end of the lower cooling pipe, and the heat exchanger is fixedly connected to the main support.

[0014] Compared with the prior art, the present invention has the following advantages: (1) by adjusting the position of the lower electrode, the storage size of the furnace chamber can be changed, so that the present invention can smelt metal materials of different weights and can also carry out targeted smelting work; (2) by using multiple cooling devices, the present invention controls the temperature of the lower electrode and the upper electrode, further reducing the loss of the lower electrode and the upper electrode, thereby reducing the smelting cost; (3) by moving the furnace shell, the present invention allows the molten metal to flow out of the present invention, so that the high-temperature waste slag at the bottom of the furnace chamber can be separated from the molten metal, thereby improving the refining efficiency and the smelting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the cross-section structure of the main support, lower cooling cylinder, furnace chamber, closed box and flow outlet of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the driving plate of the present invention.

[0018] Figure 4 It is a schematic diagram of the cross-section structure of the closed box and the furnace shell of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the closed box after sectioning of the present invention.

[0020] Figure 6 It is a schematic diagram of the cross-section structure of the closed box, the airtight cover, the delivery pipe, and the sealed heat dissipation block of the present invention.

[0021] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0022] 10. The invention relates to a heat exchanger, a heating element, and a cooling element. The heat exchanger, a cooling element, and a cooling element are provided in the following figures. The invention relates to a heat exchanger, a heating element, and a cooling element. In the embodiment of the invention, the heat exchanger, a cooling element, and a cooling element are provided. In the embodiment of the invention, the heating element, a cooling element, and a cooling element are provided. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] like Figure 1 and Figure 2 As shown, a vacuum arc remelting furnace includes a lower base 101 for supporting the device, a main bracket 102 is fixedly installed on the lower base 101, and a collecting trough 103 for connecting or fixing an external containing device is also provided on the main bracket 102, a furnace shell 106 for isolation and protection is slidably installed in the main bracket 102, a lower cooling cylinder 107 is also fixedly installed outside the furnace shell 106, a lower cooling pipe 108 is fixedly installed outside the lower cooling cylinder 107, a heat exchanger 109 is fixedly installed on the other end of the lower cooling pipe 108, and the heat exchanger 109 is fixedly connected to the main bracket 102, and the heat exchanger 109, the lower cooling pipe 108 and the lower cooling cylinder 107 are all arranged to cool the furnace shell 106.

[0025] like Figure 1 , Figure 2 , Figure 4As shown, a closing motor is fixedly installed on the lower base 101, and a closing screw 110 is fixedly installed on the output shaft of the closing motor. The closing screw 110 is rotatably connected to the main bracket 102, and the closing screw 110 is also connected to the lower cooling cylinder 107 through a thread. A lower electrode 105 is slidably installed in the furnace shell 106, and the lower electrode 105 is slidably connected to the lower base 101. The end of the lower electrode 105 that contacts the lower base 101 is fixed to the external power supply cable. The connection is used to provide high voltage current. The end of the lower electrode 105 close to the lower base 101 is rotatably installed with an adjusting screw 104. The adjusting screw 104 is connected to the lower base 101 by a thread. The end of the furnace shell 106 away from the lower base 101 is contacted with a closed box 202. A closed cover 206 is fixedly installed in the closed box 202. The closed cover 206, the furnace shell 106 and the lower electrode 105 form a furnace chamber 201, and the metal is smelted in the furnace chamber 201.

[0026] like Figure 2 As shown, a flow outlet 203 is fixedly installed at one end of the furnace shell 106 close to the sealing cover 206, one end of the flow outlet 203 leads to the furnace chamber 201, and the other end of the flow outlet 203 leads to the collecting tank 103, and a sealing block 204 is arranged between the two ends of the flow outlet 203 to act as a switch valve, and a sealing cylinder 205 is fixedly installed on the outer wall of the flow outlet 203, and the moving end of the sealing cylinder 205 is fixedly connected to the sealing block 204 to control the movement of the sealing block 204.

[0027] like Figures 2 to 6 As shown, the sealed cover 206 is provided with a plurality of electrode through holes, a protective ring strip 208 is provided on one side of the sealed cover 206 in the closed box 202, a plurality of blocking blocks 207 are slidably installed in the protective ring strip 208, a closing spring is provided on the blocking block 207, and the other end of the closing spring is fixedly installed on the protective ring strip 208, a plurality of driving cylinders 307 are fixedly installed on the main bracket 102, a driving plate 308 is fixedly installed on the moving end of the driving cylinder 307, a plurality of upper electrodes 301 are fixedly installed on the driving plate 308, and the upper electrodes 301 are fixedly installed on the upper electrodes 301. 01 is slidably connected to the main bracket 102, and one end of the upper electrode 301 away from the driving plate 308 is arranged in the furnace chamber 201. The upper electrode 301 enters the furnace chamber 201 through the electrode through hole on the sealing cover 206, and the upper electrode 301 contacts the blocking block 207 in the closed box 202. An external power supply cable is fixedly installed at one end of the upper electrode 301 away from the furnace chamber 201 to provide high voltage current. A plurality of blocking blocks 207 contact the outer wall of the upper electrode 301 through a closing spring, so that the blocking block 207 can seal the electrode through hole to the maximum extent to prevent the molten metal from splashing during smelting.

[0028] like Figures 3 to 6 As shown, a vacuum pipe head 302 is fixedly installed in the closed box 202. The vacuum pipe head 302 is used to extract the gas in the closed box 202 and the furnace chamber 201. When the vacuum pipe head 302 is working, the gas in the gas furnace chamber 201 will escape from the furnace chamber 201 through the gap of the blocking block 207. A transfer box 303 is fixedly installed at one end of the vacuum pipe head 302 outside the closed box 202. A vacuum pump 304 for generating negative pressure is fixedly installed at one end of the transfer box 303 away from the vacuum pipe head 302. The transfer box 303 and the vacuum pump 304 are connected to each other. The vacuum pump 304 and the furnace chamber 201 are connected by an air inlet pipe. A cooling box 305 for cooling and purifying exhaust gas is fixedly installed on the outer wall of the vacuum pump 304. An exhaust gas pipe is fixedly installed on the cooling box 305. The other end of the exhaust gas pipe is fixedly installed on the exhaust pipe of the vacuum pump 304. When the vacuum pump 304 is started, the gas or exhaust gas in the closed box 202 and the furnace chamber 201 will enter the vacuum pump 304 from the vacuum pipe head 302 through the transfer box 303, and then be transported to the cooling box 305 for cooling and purification, and then transported to an external collection device or purification device.

[0029] like Figures 4 to 7 As shown, a plurality of sealed heat dissipation blocks 314 are fixedly installed in the closed box 202, the vacuum pump 304 is slidably connected to the outer wall of the upper electrode 301, a plurality of circulation pipes are arranged in the sealed heat dissipation block 314, a collecting pipe 306 is fixedly installed on the outer wall of the sealed heat dissipation block 314, a refrigeration box 310 is fixedly installed on the collecting pipe 306, the refrigeration box 310 is fixedly connected to the outer wall of the closed box 202, a delivery pipe 309 is fixedly installed on the water inlet pipe of the refrigeration box 310, the other end of the delivery pipe 309 is fixedly connected to the sealed heat dissipation block 314, a plurality of cooling channels are arranged in the sealed heat dissipation block 314, and the cooling channels are arranged It is placed in the sealed heat dissipation block 314 at a position closest to the upper electrode 301. The sealed heat dissipation block 314, the collecting tube 306, the conveying tube 309, and the refrigeration box 310 are all provided with coolant for the purpose of reducing the temperature of the upper electrode 301. When the upper electrode 301 is in use, the refrigeration box 310 needs to be opened to allow the refrigeration box 310 to drive the coolant to circulate. The connection between the collecting tube 306 and the sealed heat dissipation block 314 is the water outlet, and the connection between the sealed heat dissipation block 314 and the conveying tube 309 is the water inlet. The coolant will flow in the cooling pipe in the sealed heat dissipation block 314, and the heat of the upper electrode 301 will be taken away by the continuously flowing coolant.

[0030] Working principle: Before using this device, it is necessary to start the closing motor, so that the closing motor drives the lower cooling cylinder 107 and the furnace shell 106 to slide away from the closed box 202 through the closing screw 110, so that the furnace shell 106 is out of contact with the closed box 202. The purpose of this is to allow the user to add solid metal materials into the furnace chamber 201. Here, the lower electrode 105 will not move when the furnace shell 106 slides. When there is too much metal material to be smelted, the lower electrode 105 can be moved relative to the furnace shell 106 by rotating the adjusting screw 104, thereby adjusting the space size of the furnace chamber 201, so that this device can be used in a variety of scenarios. After the metal material is added to the furnace chamber 201, the furnace shell 106 is driven back to the initial position by the closing motor, so that the furnace shell 106 fits tightly with the closed box 202 and the sealed cover 206.

[0031] After the furnace chamber 201 and the closed box 202 form a closed chamber together, the vacuum pump 304 can be started to drive the gas in the closed box 202 and the furnace chamber 201 to flow out, so that a vacuum state is formed in the closed box 202 and the furnace chamber 201. Then, the external cable can supply power to the upper electrode 301 and the lower electrode 105. At this time, the driving cylinder 307 can drive the upper electrode 301 to move toward the lower electrode 105. The purpose of this is to allow one end of the upper electrode 301 in the furnace chamber 201 to contact the metal material. When the upper electrode 301 contacts or before contacting the gold material in the furnace chamber 201, an arc will be generated. Then, the heat generated by the arc will melt the metal material in the furnace chamber 201, thereby achieving the smelting effect.

[0032] During the smelting process, the heat exchanger 109 will be started to exchange the heat on the lower cooling cylinder 107 through the lower cooling tube 108 to reduce the temperature of the lower electrode 105 and the furnace shell 106. At the same time, the refrigeration box 310 will also be started to reduce the heat of the upper electrode 301 through the coolant to further reduce the loss of the upper electrode 301. At the same time, the vacuum tube head 302 will also draw the pollutants generated in the closed box 202 and the furnace chamber 201 into the cooling box 305 for purification and cooling.

[0033] After the smelting is completed, the closing motor can be started to drive the furnace shell 106 to move toward the lower base 101. At this time, the lower electrode 105 cannot move, so that the metal solution in the furnace chamber 201 will be compressed as the space of the furnace chamber 201 is compressed, and gradually approach the connection between the flow outlet 203 and the furnace shell 106. When the metal solution enters the flow outlet 203, the sealing cylinder 205 can be started to drive the sealing cylinder 205 to move the sealing block 204 to open the channel of the flow outlet 203, so that the metal liquid can flow out of the device from the flow outlet 203. After a predetermined amount of metal solution flows out of the furnace chamber 201, the furnace shell 106 can stop moving and wait for the fertilizer loading container to be replaced on the collecting tank 103, and then the furnace shell 106 can be moved, so that the high-temperature waste slag at the bottom of the furnace chamber 201 can be separated, thereby improving the smelting quality.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A vacuum arc remelting furnace, comprising a lower base (101) for supporting the device, wherein a main support (102) is fixedly mounted on the lower base (101), characterized in that: A furnace shell (106) is slidably mounted on the main support (102), a lower electrode (105) is slidably mounted in the furnace shell (106), the lower electrode (105) is slidably connected to the lower base (101), an adjusting screw rod (104) is rotatably mounted on one end of the lower electrode (105) close to the lower base (101), the adjusting screw rod (104) is connected to the lower base (101) by threads, and a closed box (202) is contacted and mounted on one end of the furnace shell (106) away from the lower base (101), a closed cover (206) is fixedly mounted in the closed box (202), the closed cover (206) is connected to the furnace shell (106), The lower electrode (105) forms a furnace chamber (201); a flow outlet (203) is fixedly installed at one end of the furnace shell (106) close to the sealing cover (206); one end of the flow outlet (203) leads to the furnace chamber (201); the other end of the flow outlet (203) leads to the collection tank (103); a sealing block (204) is arranged between the two ends of the flow outlet (203) to act as a switch valve; a sealing cylinder (205) is fixedly installed on the outer wall of the flow outlet (203); the moving end of the sealing cylinder (205) is fixedly connected to the sealing block (204) to control the movement of the sealing block (204); A plurality of sealed heat dissipation blocks (314) for cooling are also fixedly installed in the closed box (202), a plurality of flow pipes are arranged in the sealed heat dissipation block (314), a collection pipe (306) is also fixedly installed on the outer wall of the sealed heat dissipation block (314), a refrigeration box (310) is fixedly installed on the collection pipe (306), and the refrigeration box (310) is fixedly connected to the outer wall of the closed box (202); A delivery pipe (309) is fixedly installed on the water inlet pipe of the refrigeration box (310); the other end of the delivery pipe (309) is fixedly connected to a sealed heat dissipation block (314); a plurality of cooling channels are arranged in the sealed heat dissipation block (314); and coolant is arranged in the sealed heat dissipation block (314), the collecting pipe (306), the delivery pipe (309), and the refrigeration box (310).

2. A vacuum arc remelting furnace according to claim 1, characterized in that: The sealed cover (206) is provided with a plurality of electrode through holes, a protective ring strip (208) is provided on one side of the sealed cover (206) in the closed box (202), a plurality of blocking blocks (207) are slidably mounted in the protective ring strip (208), a sealing spring is provided on the blocking block (207), the other end of the sealing spring is fixedly mounted on the protective ring strip (208), and a plurality of driving cylinders (307) are fixedly mounted on the main bracket (102).

3. A vacuum arc remelting furnace according to claim 2, characterized in that: A driving plate (308) is fixedly mounted on the movable end of the driving cylinder (307), and a plurality of upper electrodes (301) are fixedly mounted on the driving plate (308). The upper electrodes (301) are slidably connected to the main support (102), and one end of the upper electrodes (301) away from the driving plate (308) is arranged in the furnace chamber (201). The upper electrodes (301) enter the furnace chamber (201) through the electrode through-hole on the sealing cover (206), and the upper electrodes (301) are in contact with the blocking block (207) in the sealing box (202).

4. The vacuum arc remelting furnace according to claim 1, characterized in that: A vacuum pipe head (302) is also fixedly installed in the closed box (202), and the vacuum pipe head (302) is used to extract gas from the closed box (202) and the furnace chamber (201). A transfer box (303) is fixedly installed at one end of the vacuum pipe head (302) outside the closed box (202), and a vacuum pump (304) for generating negative pressure is fixedly installed at one end of the transfer box (303) away from the vacuum pipe head (302).

5. A vacuum arc remelting furnace according to claim 4, characterized in that: The transfer box (303) is connected to the vacuum pump (304) via an air intake pipe. A cooling box (305) for cooling and purifying exhaust gas is fixedly installed on the outer wall of the vacuum pump (304). An exhaust gas pipe is fixedly installed on the cooling box (305). The other end of the exhaust gas pipe is fixedly installed on the exhaust pipe of the vacuum pump (304).

6. The vacuum arc remelting furnace according to claim 1, characterized in that: A lower cooling cylinder (107) is fixedly mounted outside the furnace shell (106), a lower cooling pipe (108) is fixedly mounted outside the lower cooling cylinder (107), a heat exchanger (109) is fixedly mounted at the other end of the lower cooling pipe (108), and the heat exchanger (109) is fixedly connected to the main support (102).

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