Rapid degassing device for medium frequency electric furnace liquid metal in resin sand casting

Abstract

The utility model discloses a metal liquid rapid degassing device for resin sand casting's intermediate frequency electric furnace, related to metal smelting technical field, including bottom plate, be provided with intermediate frequency electric furnace and electric furnace control part on the bottom plate, the bottom of intermediate frequency electric furnace is installed with the air inlet pipe, is installed with the connecting pipe on the air inlet pipe, is installed with the hose on the connecting pipe, is installed with the disconnection pipe on the hose, the top of bottom plate is rotatably arranged with the exchange disc, is installed with the sealing ring in the air outlet pipe, the exchange disc bottom is installed with the exchange shaft, and the exchange shaft rotatable installation is in the bottom plate, and the gear is fixedly sleeved on the exchange shaft, and the gear is intermittently engaged with the gear toothless wheel, and the driving motor is installed on the bottom plate, and the gear toothless wheel is installed on the drive shaft, the utility model discloses, can transport the argon in argon tank to the intermediate frequency electric furnace, and the argon in the intermediate frequency electric furnace will remove the harmful gas in metal liquid quickly. Single argon tank can be automatically and quickly replaced when using, and the operation is convenient and easy to use.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and in particular to a rapid degassing device for molten metal in a medium-frequency electric furnace used in resin sand casting. Background Technology

[0002] The medium-frequency induction furnace used in resin sand casting is the core metal smelting equipment in the resin sand casting process. When metal is melted in the medium-frequency furnace, small amounts of gases such as hydrogen and carbon monoxide are produced. These gases can create tiny pinholes in the casting during resin sand casting, leading to a decrease in casting quality. Currently, the main solution is to inject argon gas into the medium-frequency furnace, utilizing the inertness of argon to form countless tiny bubbles in the molten metal. These bubbles act like small "vacuum chambers." Because the partial pressure of harmful gases inside the bubbles is very low or even zero, harmful gaseous elements such as nitrogen and hydrogen dissolved in the molten metal move towards the bubbles and eventually float to the surface of the molten metal, thus achieving the purpose of removing harmful gases.

[0003] Currently, when injecting argon into a medium-frequency induction furnace, it is necessary to connect the argon cylinder to the bottom of the furnace through a pipeline beforehand to inject the argon into the furnace. However, the amount of argon in the argon cylinder is limited. When the argon in a single argon pipe is insufficient, the argon cylinder needs to be replaced manually, and the disassembly and assembly of the gas pipeline needs to be repeated. The operation is quite cumbersome. Therefore, a rapid degassing device for molten metal in medium-frequency induction furnaces used for resin sand casting is needed to meet the application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid degassing device for molten metal in a medium-frequency electric furnace used in resin sand casting, comprising a base plate, on which a medium-frequency electric furnace and a furnace control unit are arranged, characterized in that: an inlet pipe is installed at the bottom of the medium-frequency electric furnace, a connecting pipe is installed on the inlet pipe, a flexible hose is installed on the connecting pipe, a disconnecting pipe is installed on the flexible hose, a switching plate is rotatably arranged above the base plate, an argon gas tank is arranged on the switching plate, an outlet pipe is installed at the top of the argon gas tank, and a sealing ring is installed inside the outlet pipe.

[0006] Preferably, an adjustment shaft is installed at the bottom of the adjustment disc, the adjustment shaft is rotatably mounted on the base plate, and a gear is fixedly sleeved on the adjustment shaft, with a missing gear intermittently meshing on the gear.

[0007] Preferably, a drive motor is mounted on the base plate, a drive shaft is mounted on the output end of the drive motor, and the missing gear is mounted on the drive shaft.

[0008] Preferably, a positioning sleeve is installed on the switching plate, the argon gas cylinder is placed inside the positioning sleeve, a miniature fixing screw is screwed into the positioning sleeve, and an L-shaped plate is installed at the end of the miniature fixing screw.

[0009] Preferably, a horizontal plate is fixedly sleeved on the disassembly pipe, a first connecting block is installed on the horizontal plate, a connecting rod is rotatably installed on the first connecting block, a second connecting block is slidably arranged on the L-shaped plate, and the other end of the connecting rod is rotatably installed on the second connecting block.

[0010] Preferably, an electric slide rail is installed on the L-shaped plate, an electric sliding sleeve is slidably installed on the electric slide rail, and the second connecting block is installed on the electric sliding sleeve.

[0011] Preferably, a guide rod is installed on the L-shaped plate, and a guide sleeve is installed at the end of the horizontal plate, with the guide sleeve slidably sleeved on the guide rod.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, one rotation of the drive shaft causes the missing gear to rotate one rotation, and one rotation of the missing gear causes the gear to rotate one-third of a rotation. This, in turn, causes the changing shaft to rotate the changing disc one-third of a rotation, allowing the empty argon canister to be replaced. Then, by following the above process, the drive disconnect pipe is inserted into the gas outlet pipe, thus realizing the replacement of the argon canister. When a single argon canister is used up, it can be automatically and quickly replaced. The operation is convenient and easy to use.

[0014] In this invention, the rotation of the connecting rod drives the disassembly pipe to be inserted into the gas outlet pipe. The argon gas in the argon tank enters the disassembly pipe through the gas outlet pipe, then enters the hose through the disassembly pipe, then enters the connecting pipe through the hose, then enters the gas inlet pipe through the connecting pipe, and finally enters the medium frequency furnace through the gas inlet pipe. The argon gas entering the medium frequency furnace will quickly remove harmful gases from the molten metal. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the rapid degassing device for medium-frequency electric furnace molten metal in resin sand casting proposed in this utility model.

[0016] Figure 2 This is a side view of the rapid degassing device for medium-frequency electric furnace molten metal in resin sand casting proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the gears, missing gears, and other structures of the rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting proposed in this utility model.

[0018] Figure 4This is a schematic diagram of the horizontal plate, connecting rod, and other structures of the rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting proposed in this utility model.

[0019] In the diagram: 1. Base plate; 2. Medium frequency electric furnace; 3. Furnace control unit; 4. Inlet pipe; 5. Connecting pipe; 6. Hose; 7. Disconnecting pipe; 8. Changing plate; 9. Argon cylinder; 10. Outlet pipe; 11. Sealing ring; 12. Changing shaft; 13. Gear; 14. Missing gear; 15. Drive motor; 16. Drive shaft; 17. Positioning sleeve; 18. Miniature fixing screw; 19. L-shaped plate; 20. Horizontal plate; 21. Connecting block No. 1; 22. Connecting rod; 23. Connecting block No. 2; 24. Electric slide rail; 25. Electric sliding sleeve; 26. Guide rod; 27. Guide sleeve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example:

[0022] like Figure 1-4 As shown, this embodiment provides a rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting. It includes a base plate 1, on which a medium-frequency electric furnace 2 and a furnace control unit 3 are mounted. An inlet pipe 4 is installed at the bottom of the medium-frequency electric furnace 2, a connecting pipe 5 is installed on the inlet pipe 4, a flexible hose 6 is installed on the connecting pipe 5, and a disassembly pipe 7 is installed on the flexible hose 6. An exchange plate 8 is rotatably mounted above the base plate 1, and an argon cylinder 9 is mounted on the exchange plate 8. An outlet pipe 10 is installed on the top of the argon cylinder 9, and a sealing ring 11 is installed inside the outlet pipe 10. The argon cylinder 9 is pre-placed on the exchange plate 8 and clamped in place. The disassembly pipe 7 moves downwards and inserts into the outlet pipe 10. The sealing ring 11 directly contacts the disassembly pipe 7, ensuring a seal between the disassembly pipe 7 and the outlet pipe 10, preventing argon leakage. Open the valve on the outlet pipe 10 again, and the argon gas in the argon tank 9 will enter the disassembly pipe 7 through the outlet pipe 10, and then enter the hose 6 through the disassembly pipe 7, then enter the connecting pipe 5 through the hose 6, and then enter the inlet pipe 4 through the connecting pipe 5, and finally enter the medium frequency electric furnace 2 through the inlet pipe 4. The argon gas entering the medium frequency electric furnace 2 will quickly remove harmful gases from the molten metal.

[0023] When the argon gas in a single argon cylinder 9 is depleted, the drive disconnect pipe 7 is pulled out from the outlet pipe 10. The replacement disc 8 rotates one-third of a turn to replace the depleted argon cylinder 9. Then, by following the above process, the drive disconnect pipe 7 is inserted into the outlet pipe 10 to replace the argon cylinder 9. The replacement of a single argon cylinder 9 can be performed automatically and quickly when it is depleted, making it convenient to use the argon cylinder 9.

[0024] To drive the rotation of the switching disk 8 to switch the argon tank 9, a switching shaft 12 is installed at the bottom of the switching disk 8. The switching shaft 12 is rotatably mounted on the base plate 1. A gear 13 is fixedly sleeved on the switching shaft 12. A missing gear 14 is intermittently meshed on the gear 13. A drive motor 15 is installed on the base plate 1. A drive shaft 16 is installed at the output end of the drive motor 15. The missing gear 14 is installed on the drive shaft 16. The rotation of the drive motor 15 will drive the drive shaft 16 to rotate. One rotation of the drive shaft 16 will drive the missing gear 14 to rotate one rotation. One rotation of the missing gear 14 will drive the gear 13 to rotate one-third of a rotation. In turn, the switching disk 8 will rotate one-third of a rotation through the switching shaft 12.

[0025] To secure the argon cylinder 9 to the switching plate 8, a positioning sleeve 17 is installed on the switching plate 8. The argon cylinder 9 is placed inside the positioning sleeve 17, and a miniature fixing screw 18 is screwed into the positioning sleeve 17. A soft pad is installed at the end of the miniature fixing screw 18. The argon cylinder 9 is placed inside the positioning sleeve 17 beforehand, and then the miniature fixing screw 18 is screwed into the positioning sleeve 17. The soft pad at the end of the miniature fixing screw 18 presses against the argon cylinder 9 to clamp and fix it.

[0026] To drive the disconnect pipe 7 to be pulled out or inserted into the vent pipe 10, a horizontal plate 20 is fixedly sleeved on the disconnect pipe 7. A first connecting block 21 is installed on the horizontal plate 20, and a connecting rod 22 is rotatably installed on the first connecting block 21. A second connecting block 23 is slidably arranged on the L-shaped plate 19, and the other end of the connecting rod 22 is rotatably installed on the second connecting block 23. An electric slide rail 24 is installed on the L-shaped plate 19, and an electric sliding sleeve 25 is slidably installed on the electric slide rail 24. The second connecting block 23 is installed on the electric sliding sleeve 25. Moving the electric sliding sleeve 25 backward will drive the second connecting block 23 backward, and moving the second connecting block 23 backward will drive the connecting rod 22 to rotate. Rotating rod 22 will pull connecting block 21 and horizontal plate 20 downward. The downward movement of horizontal plate 20 will cause the end of the disassembly pipe 7 to be inserted into the gas outlet pipe 10. The sealing ring 11 directly contacts the disassembly pipe 7, which can make the disassembly pipe 7 and the gas outlet pipe 10 sealed to prevent argon leakage. Moving electric sliding sleeve 25 forward will cause connecting block 23 to move forward. Moving connecting block 23 forward will cause connecting rod 22 to reverse. Reversing connecting rod 22 will push connecting block 21 and horizontal plate 20 upward. Moving horizontal plate 20 upward will cause disassembly pipe 7 to be pulled out from the gas outlet pipe 10.

[0027] To guide the movement of the disassembly pipe 7, a guide rod 26 is installed on the L-shaped plate 19, and a guide sleeve 27 is installed at the end of the horizontal plate 20. The guide sleeve 27 is slidably sleeved on the guide rod 26. The sliding of the guide sleeve 27 within the guide rod 26 can guide the movement of the horizontal plate 20 and the disassembly pipe 7, so that the disassembly pipe 7 can only move up and down.

[0028] Working principle: In use, the argon cylinder 9 is placed in the positioning sleeve 17 beforehand, and then the miniature fixing screw 18 is screwed into the positioning sleeve 17. The soft pad at the end of the miniature fixing screw 18 presses against the argon cylinder 9 to clamp and fix it. The electric sliding sleeve 25 moves backward, which drives the second connecting block 23 to move backward. The second connecting block 23 moves backward, which drives the connecting rod 22 to rotate. The rotation of the connecting rod 22 pulls the first connecting block 21 and the horizontal plate 20 downward. The downward movement of the horizontal plate 20 causes the end of the disassembly pipe 7 to be inserted into the gas outlet pipe 10. The sealing ring 11 directly contacts the disassembly pipe 7, which can make the disassembly pipe 7 and the gas outlet pipe 10 sealed to prevent argon leakage. Open the valve on the vent pipe 10, and the argon gas in the argon tank 9 will enter the disassembly pipe 7 through the vent pipe 10, then enter the hose 6 through the disassembly pipe 7, then enter the connecting pipe 5 through the hose 6, then enter the inlet pipe 4 through the connecting pipe 5, and finally enter the medium frequency furnace 2 through the inlet pipe 4. The argon gas entering the medium frequency furnace 2 will quickly remove harmful gases from the molten metal. When the argon gas in a single argon tank 9 is used up, the electric sliding sleeve 25 moves forward, which will drive the second connecting block 23 to move forward. The forward movement of the second connecting block 23 will drive the connecting rod 22 to reverse. The reverse movement of the connecting rod 22 will push the first connecting block 21 and the horizontal plate 20 to move upward. The upward movement of the horizontal plate 20 will drive the disassembly pipe 7 to be pulled out from the vent pipe 10. Restart the drive motor 15. The rotation of the drive motor 15 will drive the drive shaft 16 to rotate. One rotation of the drive shaft 16 will drive the missing gear 14 to rotate one rotation. The rotation of the missing gear 14 will drive the gear 13 to rotate one-third of a rotation. This will then drive the switching shaft 12 to rotate the switching disc 8 one-third of a rotation, which can replace the argon canister 9 that has run out of argon. Then, by following the above process, the drive disconnect pipe 7 is inserted into the gas outlet pipe 10, which can replace the argon canister 9. When a single argon canister 9 is used up, it can be automatically and quickly replaced. The operation is convenient and easy to use.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting, comprising a base plate (1), wherein a medium-frequency electric furnace (2) and an electric furnace control unit (3) are disposed on the base plate (1), characterized in that: The medium-frequency electric furnace (2) is equipped with an air inlet pipe (4) at the bottom, a connecting pipe (5) is installed on the air inlet pipe (4), a flexible hose (6) is installed on the connecting pipe (5), a disconnect pipe (7) is installed on the flexible hose (6), a switching plate (8) is rotatably arranged above the base plate (1), an argon tank (9) is arranged on the switching plate (8), an exhaust pipe (10) is installed on the top of the argon tank (9), and a sealing ring (11) is installed inside the exhaust pipe (10).

2. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 1, characterized in that: The bottom of the switching plate (8) is equipped with a switching shaft (12), which is rotatably mounted on the base plate (1). A gear (13) is fixedly sleeved on the switching shaft (12), and a missing gear (14) is intermittently meshed on the gear (13).

3. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 2, characterized in that: A drive motor (15) is mounted on the base plate (1), and a drive shaft (16) is mounted on the output end of the drive motor (15). The missing gear (14) is mounted on the drive shaft (16).

4. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 1, characterized in that: A positioning sleeve (17) is installed on the switching plate (8), and the argon gas tank (9) is set inside the positioning sleeve (17). A miniature fixing screw (18) is screwed into the positioning sleeve (17), and an L-shaped plate (19) is installed at the end of the miniature fixing screw (18).

5. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 4, characterized in that: A horizontal plate (20) is fixedly sleeved on the disassembly pipe (7). A first connecting block (21) is installed on the horizontal plate (20). A connecting rod (22) is rotatably installed on the first connecting block (21). A second connecting block (23) is slidably arranged on the L-shaped plate (19). The other end of the connecting rod (22) is rotatably installed on the second connecting block (23).

6. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 5, characterized in that: An electric slide rail (24) is installed on the L-shaped plate (19), and an electric sliding sleeve (25) is slidably installed on the electric slide rail (24). The second connecting block (23) is installed on the electric sliding sleeve (25).

7. The rapid degassing device for molten metal in a medium-frequency electric furnace for resin sand casting according to claim 5, characterized in that: A guide rod (26) is installed on the L-shaped plate (19), and a guide sleeve (27) is installed at the end of the horizontal plate (20). The guide sleeve (27) is slidably sleeved on the guide rod (26).

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