Metal melting furnace body capable of accurately controlling liquid level position

Abstract

The utility model relates to the field of metal melting, in particular to a metal melting furnace body capable of accurately controlling the liquid level position, which comprises a coreless furnace body, a voltage stabilizer and an inert gas generator, a protective cover is fixedly arranged on the inner wall of the top of the coreless furnace body, the whole process of smelting and pouring can be protected, air is prevented from entering, metal materials are prevented from being oxidized to influence smelting, and the production efficiency is improved. A gas conveying pipe of the inert gas generator is connected with the middle of the protective cover, the inert gas generator communicates with the pressure stabilizer through the first connecting pipe, the second connecting pipe and the hose, the inert gas generator and the pressure stabilizer are started, inert gas is pumped into the smelting cavity, the inert gas can play a role in protection, metal materials are prevented from being polluted in the smelting and pouring process, and the service life of the metal materials is prolonged. The inert gas generator can pump in gas, pressurization is carried out during liquid transfer to press the molten metal out of the pipe, and the liquid level is accurately controlled through pressure, so that the liquid transfer process is stable and controllable, and the problems of molten metal splashing, oxidation and safety caused by unstable liquid transfer are reduced.

Description

Technical Field

[0001] The utility model relates to the field of metal melting, in particular to a metal melting furnace body with a liquid level position accurately controlled. Background Art

[0002] Coreless furnaces are widely used in the process of molten metal melting and pouring. During pouring, the molten metal is poured into the chute or mold through the pouring nozzle, often taking the metal from the top first, gradually moving downward, and finally the metal at the bottom. The inclusions and gases in the metal will flow into the next process as the pouring process.

[0003] However, the prior art has the following defects:

[0004] The coreless furnace is in an exposed state when melting metal, and the molten metal will be oxidized, causing metal contamination. At the same time, when the molten metal is transferred, there is no filtering device, and the slag and gas in the molten metal can easily transfer to the next process, which has a significant impact on the quality of the final product. Utility Model Content

[0005] The utility model aims to provide a metal melting furnace with a precisely controlled liquid level position, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a metal melting furnace body with precise control of liquid level position, comprising a coreless furnace body, a voltage stabilizer and an inert gas generator, a smelting chamber is provided inside the coreless furnace body, a furnace body shell is provided around the outside of the smelting chamber, a protective cover is provided on the top of the coreless furnace body, the inner wall of the top of the coreless furnace body is fixedly connected to the outer wall of the protective cover, an air inlet is provided in the middle of the top of the protective cover, a gas pipe is fixedly installed on the bottom of the inert gas generator, the gas pipe is inserted and installed in the air inlet, a feed port is fixedly installed on one side of the top of the protective cover, a first through hole is provided on the other side of the top of the protective cover, and a pouring pipe is inserted and installed in the first through hole.

[0007] By adopting the above technical solution, the metal can be melted in the melting chamber, the protective cover can isolate the air to prevent the molten metal from oxidation, and the inert gas generator can inject inert gas into the melting chamber to squeeze the molten metal to make it flow out of the pouring pipe.

[0008] A sealing cover is mounted inside the feed port, a disc is fixedly mounted on the top of the sealing cover, the diameter of the disc is larger than the diameter of the feed port, and a sealing gasket is bonded to the outer wall of the bottom of the sealing cover.

[0009] The above technical solution is adopted. The sealing cover of the solution closes the feed port to prevent oxygen from entering and affecting smelting. The disc is convenient for pulling out the sealing cover, and the sealing gasket further enhances the sealing performance.

[0010] The pouring pipe is in an inclined "7" shape, and a flange is fixedly installed on the outer wall of one end of the pouring pipe close to the bend. Threaded through holes are opened around the top of the flange, and the flange is threadedly connected to one side of the protective cover by bolts around it.

[0011] The above technical solution is adopted, in which the pouring pipe is threadedly connected to one side of the protective cover, and the connection is tight, which can prevent the pouring pipe from moving and ensure that the bottom molten metal flows out first. The pouring pipe is detachable for easy cleaning and replacement.

[0012] The pouring tube is made of silicon carbide material, and the bottom of the pouring tube is located a distance above the bottom inner wall of the coreless furnace body.

[0013] By adopting the above technical solution, the silicon carbide material has excellent high temperature resistance and wear resistance, and the bottom of the pouring tube is higher than the bottom inner wall of the coreless furnace body, which is convenient for the molten metal to flow out.

[0014] A first connecting pipe is fixedly installed on one side of the bottom of the pressurizer, and a second connecting pipe is fixedly installed on one side of the bottom of the inert gas generator. The first connecting pipe and the second connecting pipe are connected through a hose.

[0015] The above technical solution is adopted. In this solution, the inert gas generated in the inert gas generator is connected to the voltage stabilizer through a hose. The voltage stabilizer plays a role of voltage stabilization, stably outputs the inert gas to the inside of the furnace body, increases the gas pressure inside the smelting chamber, and allows the molten metal inside the smelting chamber to flow out from the pouring pipe.

[0016] A plurality of annular fixing members are arranged in sequence from bottom to top inside the furnace shell, a plurality of second through holes are opened on the annular fixing members, induction coils are inserted and installed in the second through holes, and the annular fixing members are made of epoxy resin.

[0017] The above technical solution is adopted, which utilizes the induction coil to heat the inside of the furnace, which is helpful for melting bulk metal. The epoxy resin has good heat resistance and insulation properties, and the insulating annular fixing piece can improve the stability of the induction coil.

[0018] A pressure gauge is fixedly mounted on one side of the protective cover close to the feed port, and sealing gaskets are bonded to the inner wall of the air inlet and the inner wall of the first through hole.

[0019] By adopting the above technical solution, the pressure gauge of the solution can intuitively see the pressure changes inside the furnace body, and the sealing gasket can ensure that the inside of the coreless furnace is a closed space to prevent oxygen from entering and causing oxidation of the molten metal.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The protective cover can completely protect the entire melting and pouring process inside the furnace. The reaction in the inert gas generator produces inert gas, which enters the voltage stabilizer through a hose. The voltage stabilizer plays a role in stabilizing the voltage and stably outputs the inert gas to the inside of the furnace. When transferring liquid, a pressure device is used to pressurize the molten metal out of the tube. The liquid level is accurately controlled by pressure, thereby achieving a stable and controllable transfer process and reducing metal liquid splashing, oxidation and safety problems caused by unstable transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the coreless furnace body of the utility model;

[0024] Figure 3 It is a schematic plan view of the top structure of the utility model.

[0025] In the figure: 1. coreless furnace body; 2. protective cover; 3. voltage stabilizer; 4. pouring pipe; 5. air inlet pipe; 6. feed port; 7. hose; 8. inert gas generator; 9. sealing cover; 10. furnace body shell; 11. through hole; 12. annular fixing piece; 13. induction coil; 14. smelting chamber; 15. first connecting pipe; 16. second connecting pipe; 17. air inlet; 18. flange; 19. threaded through hole; 20. bolt; 21. pressure gauge. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-3The utility model provides a metal melting furnace body with precise control of liquid level position, including a coreless furnace body 1, a voltage regulator 3 and an inert gas generator 8. A smelting chamber 14 is provided inside the coreless furnace body 1, and a furnace body shell 10 is provided around the outside of the smelting chamber 14. A protective cover 2 is provided on the top of the coreless furnace body 1, and the inner wall of the top of the coreless furnace body 1 is fixedly connected to the outer wall of the protective cover 2. An air inlet 17 is provided in the middle of the top of the protective cover 2. A gas delivery pipe 5 is fixedly installed at the bottom of the voltage regulator 3, and the gas delivery pipe 5 is inserted and installed in the air inlet 17. A feed port 6 is fixedly installed on one side of the top of the protective cover 2, and a first through hole 11 is provided on the other side of the top of the protective cover 2. A pouring pipe 4 is inserted and installed in the first through hole 11. The protective cover 2 completely protects the entire smelting process, the voltage regulator 3 can inject gas into the smelting chamber 14, and the pouring pipe 4 is convenient for pouring molten metal.

[0028] A sealing cover 9 is snap-fitted inside the feed port 6, a disc 21 is fixedly mounted on the top of the sealing cover 9, the diameter of the disc 21 is larger than the diameter of the feed port 6, a sealing gasket is bonded to the outer wall of the bottom of the sealing cover 9, the sealing cover 9 serves to close the feed port 6, and the disc 21 facilitates the removal of the sealing cover 9.

[0029] The pouring pipe 4 is in an inclined "7" shape, and a flange 18 is fixedly installed on the outer wall of one end of the pouring pipe 4 close to the bend. Threaded through holes 19 are opened around the top of the flange 18. The flange 18 is threadedly connected to one side of the protective cover 2 by bolts 20 around it, and one end of the pouring pipe 4 is threadedly connected to one side of the top of the protective cover 2.

[0030] The pouring tube 4 is made of silicon carbide material, and the bottom of the pouring tube 4 is located a distance above the bottom inner wall of the coreless furnace body 1. Silicon carbide material has good high temperature resistance. The bottom of the pouring tube 4 is higher than the bottom inner wall of the coreless furnace body 1, which is convenient for pouring molten metal.

[0031] A first connecting pipe 15 is fixedly installed on one side of the bottom of the voltage stabilizer 3, and a second connecting pipe 16 is fixedly installed on one side of the bottom of the inert gas generator 8. The first connecting pipe 15 and the second connecting pipe 16 are connected through a hose 7. The gas in the inert gas generator 8 is acted on by the voltage stabilizer 3 and enters the smelting chamber 14 through the hose 7.

[0032] A plurality of annular fixing members 12 are sequentially arranged inside the furnace shell 10 from bottom to top. A plurality of second through holes 22 are opened on the annular fixing members 12. Induction coils 13 are inserted and installed in the second through holes 22. The annular fixing members 12 are made of epoxy resin. The induction coils 13 are used to heat the inside of the furnace. The epoxy resin has good insulation properties and can ensure the stability of the induction coils 13.

[0033] A pressure gauge 23 is fixedly installed on one side of the top of the protective cover 2 near the feed port 6. The inner wall of the air inlet 17 and the inner wall of the first through hole 11 are both bonded with sealing gaskets to prevent gas leakage. The pressure gauge 23 can intuitively observe the pressure changes inside the furnace body.

[0034] Working principle: When the utility model is used, the metal material is first fed into the smelting chamber 14 through the feed port 6, and then the sealing cover 9 is inserted into the feed port 6 to prevent air from entering from the feed port 6, and the inert gas generator 8 is started to inject a small amount of inert gas into the smelting chamber 14 to maintain a slight positive pressure in the smelting chamber 14 to protect the metal material and prevent it from being oxidized during the smelting process, and one end of the pouring pipe 4 is inserted into the first through hole 11, and the flange 18 on the outer wall of the other end of the pouring pipe 4 is threadedly connected to one side of the top of the protective cover 2 by the bolt 20, and the induction coil 13 is used to heat the inside of the furnace body so that the metal material is melted into molten metal. After the smelting is completed, the inert gas generator 8 is started again to inject inert gas to increase the internal air pressure of the smelting chamber 14 so that the molten metal is poured out from the pouring pipe 4 to complete the pouring, and the liquid level is accurately controlled by pressure, so that the liquid transfer process is stable and controllable, and the splashing, oxidation and safety problems of the molten metal caused by unstable liquid transfer are reduced.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A metal melting furnace with precisely controlled liquid level position, comprising a coreless furnace body (1), a voltage stabilizer (3) and an inert gas generator (8), characterized in that: A smelting chamber (14) is provided inside the coreless furnace body (1), a furnace shell (10) is provided around the outside of the smelting chamber (14), a protective cover (2) is provided on the top of the coreless furnace body (1), the inner wall of the top of the coreless furnace body (1) is fixedly connected to the outer wall of the protective cover (2), an air inlet (17) is provided in the middle of the top of the protective cover (2), a gas delivery pipe (5) is fixedly installed at the bottom of the voltage stabilizer (3), the gas delivery pipe (5) is inserted into the air inlet (17), a feed port (6) is fixedly installed on one side of the top of the protective cover (2), a first through hole (11) is provided on the other side of the top of the protective cover (2), and a pouring pipe (4) is inserted into the first through hole (11).

2. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: A sealing cover (9) is mounted inside the feed port (6), a disc (21) is fixedly mounted on the top of the sealing cover (9), the diameter of the disc (21) is larger than the diameter of the feed port (6), and a sealing gasket is bonded to the outer wall of the bottom of the sealing cover (9).

3. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: The pouring pipe (4) is in an inclined "7" shape. A flange (18) is fixedly mounted on the outer wall of one end of the pouring pipe (4) close to the bend. Threaded through holes (19) are provided around the top of the flange (18). The flange (18) is threadedly connected to one side of the protective cover (2) via bolts (20) around the flange.

4. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: The material of the pouring pipe (4) is silicon carbide material, and the bottom of the pouring pipe (4) is located a distance above the bottom inner wall of the coreless furnace body (1).

5. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: A first connecting pipe (15) is fixedly mounted on one side of the bottom of the voltage stabilizer (3), and a second connecting pipe (16) is fixedly mounted on one side of the bottom of the inert gas generator (8); the first connecting pipe (15) and the second connecting pipe (16) are connected via a hose (7).

6. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: A plurality of annular fixing members (12) are arranged in sequence from bottom to top inside the furnace shell (10); a plurality of second through holes (22) are opened on the annular fixing member (12); an induction coil (13) is inserted into the second through hole (22); and the annular fixing member (12) is made of epoxy resin.

7. The metal melting furnace with precise liquid level control according to claim 1, characterized in that: A pressure gauge (23) is fixedly mounted on one side of the protective cover (2) close to the feed port (6), and sealing gaskets are bonded to the inner wall of the air inlet (17) and the inner wall of the first through hole (11).

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