Dual chamber dual pressurized dosing oven

Abstract

The utility model provides a kind of double-chamber double-pressurization quantitative furnace, including lifting furnace frame, lifting furnace frame top surface is connected with furnace body, furnace body includes main furnace chamber and quantitative chamber, and main furnace chamber and quantitative chamber are communicated by liquid inlet valve between;Quantitative chamber top opening is connected with quantitative chamber cover, quantitative chamber cover is connected with vacuum pump and delivery pipe, the delivery pipe is equipped with liquid outlet control valve, and liquid outlet control valve controls delivery pipe opening or closing;Quantitative chamber is pumped by vacuum pump or pressurization, and delivery pipe sends out aluminium liquid from quantitative chamber.When quantitative chamber is pumped by vacuum pump, aluminium liquid flows from main furnace chamber to quantitative chamber by liquid inlet valve;When quantitative chamber is pressurized by vacuum pump, aluminium liquid in quantitative chamber is sent out from delivery pipe.The utility model sets up main furnace chamber and quantitative chamber, realizes fast and accurate soup by controlling vacuum pump forward and reverse, satisfies high frequency, mass production demand, sets up chute as tubular, reduces aluminium liquid and air contact, reduces oxidation reaction, improves product quality.

Description

Technical Field

[0001] This utility model belongs to the field of quantitative furnace technology, specifically relating to a dual-chamber dual-pressure quantitative furnace. Background Technology

[0002] Small aluminum castings require extremely high performance, precision, and stability. They necessitate precise quantitative casting to meet the demands of precision assembly and lightweight design. However, the current small aluminum alloy casting industry suffers from significant deficiencies in its molten metal supply system, hindering improvements in production efficiency and product quality.

[0003] Currently, the commonly used molten aluminum filling systems in the industry mainly include single-chamber pressurized quantitative furnaces and holding furnace ladles. Traditional single-chamber pressurized quantitative furnaces use single-chamber pressurization or vacuuming methods, resulting in slow aluminum molten filling speeds and production efficiency that cannot meet the demands of high-frequency, high-volume production. Due to structural design limitations, single-chamber pressurized quantitative furnaces have insufficient usable capacity, requiring frequent molten aluminum additions, leading to fluctuations in production rhythm. Frequent molten aluminum additions not only increase equipment downtime but also easily cause fluctuations in aluminum molten temperature, resulting in defects such as porosity and shrinkage in castings, and an increased defect rate. At the same time, frequent operator intervention exacerbates labor intensity and labor costs. The chute design of traditional single-chamber pressurized quantitative furnaces is an open structure, lacking effective heating, heat preservation, and positive pressure angle injection mechanisms. During the transmission process, the aluminum molten aluminum has a large contact area with air for a long time, making it highly susceptible to oxidation and the formation of oxide slag. Simultaneously, aluminum adhesion leads to the accumulation of residues on the inner wall of the chute, affecting the stability of the aluminum molten aluminum flow and causing deviations in quantitative accuracy. The open design of the heat preservation furnace with ladle system results in significant heat loss, leading to low energy efficiency and a substantial increase in customer manufacturing costs. Furthermore, the prolonged exposure of molten aluminum to air in the open system accelerates the formation of the surface oxide film. This oxide film, when mixed with the molten aluminum, easily causes defects such as inclusions and surface flaws in the castings, reducing the product's mechanical properties and appearance quality.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a double-chamber double-pressure quantitative furnace. Through the synergistic effect of the main furnace chamber and the quantitative chamber, the problem of slow aluminum liquid filling is solved, which meets the needs of high-frequency and large-volume production. The chute is designed as a tube to reduce the heat loss of aluminum liquid, reduce oxidation, improve energy utilization, and improve product quality.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a dual-chamber, dual-pressure quantitative furnace, including a lifting furnace frame. A furnace body is connected to the top of the lifting furnace frame. The furnace body includes a main furnace chamber and a quantitative chamber, which are connected via an inlet valve. A quantitative chamber cover is connected to the top opening of the quantitative chamber, and the quantitative chamber cover is connected to a vacuum pump and a delivery pipe. The delivery pipe is equipped with an outlet control valve, which controls the opening or closing of the delivery pipe. The vacuum pump evacuates or pressurizes the quantitative chamber, and the delivery pipe delivers molten aluminum from the quantitative chamber. When the vacuum pump evacuates the quantitative chamber, molten aluminum flows from the main furnace chamber through the inlet valve to the quantitative chamber; when the vacuum pump pressurizes the quantitative chamber, molten aluminum inside the quantitative chamber is delivered through the delivery pipe. This utility model closes the inlet valve and the outlet control valve. The inlet valve isolates the main furnace chamber and the quantitative chamber, and the outlet control valve seals the delivery pipe. Molten aluminum is injected into the main furnace chamber through the molten aluminum inlet, and the vacuum pump evacuates the quantitative chamber, creating a negative pressure in the quantitative chamber. When molten aluminum comes into contact with the level sensor in the main furnace chamber, the sensor sends a signal to the control system, which then stops the addition of molten aluminum and issues a warning. The inlet valve is then opened to allow molten aluminum to enter the metering chamber under negative pressure. During this process, the vacuum pump continuously creates a vacuum. When the molten aluminum comes into contact with the level sensor in the metering chamber, the sensor sends a signal to the control system, which then shuts off the vacuum pump and the inlet valve. When adding molten aluminum, the vacuum pump reverses direction to inject gas into the metering chamber, creating positive pressure. Then, the outlet control valve is opened, and the molten aluminum is fed into the die-casting machine through the delivery pipe, achieving precise metering. This invention, with its main furnace chamber and metering chamber, achieves rapid and precise molten aluminum addition by controlling the forward and reverse rotation of the vacuum pump, solving the problem of slow molten aluminum filling and meeting the needs of high-frequency, high-volume production. The tubular chute reduces contact between the molten aluminum and air, minimizing oxidation and improving product quality.

[0007] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, a furnace cover is connected to the opening at the top of the furnace body. An air inlet valve is connected to the air inlet on the furnace cover, and the air inlet valve is connected to an air inlet pipe. During the stage where molten aluminum enters the quantitative chamber from the main furnace chamber, a vacuum pump evacuates the quantitative chamber, and the air inlet valve is opened to pressurize the main furnace chamber. During the liquid feeding stage, the air inlet valve is opened to inject inert gas into the main furnace chamber, creating a positive pressure in the main furnace chamber. Combined with the negative pressure formed in the quantitative chamber, this creates a double pressure difference, significantly accelerating the flow of molten aluminum from the liquid inlet valve into the quantitative chamber, thus improving the liquid feeding efficiency.

[0008] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, one end of the delivery pipe is located at the bottom of the quantitative chamber, and the liquid outlet control valve is located at the bottom end of the delivery pipe. The liquid outlet control valve controls the opening or closing of the delivery pipe. The delivery pipe's location at the bottom ensures the aluminum liquid is drained, ensuring accurate liquid delivery.

[0009] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, the main furnace chamber and the quantitative chamber are connected by a liquid inlet channel. The liquid inlet channel is vertically positioned, with the inlet valve located at the bottom. The upper opening of the liquid inlet channel is higher than the level gauge installed in the main furnace chamber. Since the upper end of the liquid inlet channel is higher than the highest point of the level gauge, when the inlet valve is closed, the liquid level in the liquid inlet channel is higher than the liquid level in the main furnace chamber, creating a gas-sealed structure. When liquid is discharged and added, the vacuum pump reverses direction to inject gas into the quantitative chamber, creating positive pressure. At this time, the closed inlet valve and the molten aluminum in the liquid inlet channel form a double seal, preventing gas from leaking from the quantitative chamber into the main furnace chamber and disrupting the pressure environment.

[0010] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, the furnace body is equipped with a soup inlet, and a soup inlet cover is provided at the soup inlet. The soup inlet cover and the furnace body are sealed together. To ensure the airtightness of the connection between the soup inlet cover and the furnace body, a sealing element and a locking mechanism are provided between them. The sealed connection of the soup inlet cover can maintain the positive pressure environment of the main furnace chamber and improve the liquid feeding efficiency from the main furnace chamber to the quantitative chamber.

[0011] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, the lifting furnace frame includes a base plate, a scissor-type telescopic frame, a top plate, and a drive mechanism. The base plate and top plate are connected by the scissor-type telescopic frame, and the drive mechanism is connected between the base plate and the top plate, driving the top plate to rise or fall. Bottom wheels are rotatably connected to the bottom surface of the base plate, located at the four corners of the base plate. The end of the base plate away from the drive mechanism is connected to a support column. When the top plate descends to its lowest point, the support column abuts against the bottom surface of the top plate to form support. The scissor-type telescopic frame includes two arms connected by a central shaft. One arm has its upper end slidably connected to the top plate and its lower end hinged to the base plate; the other arm has its upper end hinged to the top plate and its lower end slidably connected to the base plate. The drive mechanism is a linear drive mechanism, which drives a screw sleeve to rotate via a motor. The screw sleeve drives a screw to extend or retract, thereby lifting the furnace body to meet the liquid delivery requirements of die-casting machines of different heights.

[0012] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, the vacuum pump is a Roots vacuum pump. Roots vacuum pumps are heat-resistant and allow for rapid switching between suction and pressurization modes by controlling the forward and reverse rotation of the motor, meeting the frequent pressure switching requirements for molten aluminum transport.

[0013] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, a heating rod is installed in the main furnace chamber, extending from the top to the bottom of the main furnace chamber. The heating rod penetrates the main furnace chamber, ensuring uniform temperature of the molten aluminum.

[0014] Furthermore, in the aforementioned dual-chamber, dual-pressure quantitative furnace, a heating system is provided on the outside of the conveying pipe, and the heating system is spirally wound around the outer circumference of the conveying pipe; an insulation layer is provided on the outside of the heating system, which insulates the conveying pipe. The heating system is provided with electric heating wires or heating tubes. The heating system and the insulation layer can maintain the temperature of the conveying pipe, prevent the aluminum liquid from cooling down and solidifying during the conveying process, reduce heat loss, and improve energy efficiency.

[0015] Furthermore, in the aforementioned dual-chamber, dual-pressure metering furnace, a gas storage tank is located at the top of the furnace body. The gas storage tank has a first channel and a second channel, each equipped with a first valve and a second valve, respectively. The first channel is connected to an inlet valve, and the second channel is connected to the outlet of a vacuum pump. When molten aluminum enters the metering chamber from the main furnace chamber, the vacuum pump discharges the gas from the metering chamber into the gas storage tank. When pressurization of the main furnace chamber is required, the first valve is opened, and the inert gas in the gas storage tank is injected into the main furnace chamber through the first channel. When the vacuum pump evacuates the metering chamber, the second valve is opened, and the vacuum pump draws gas from the metering chamber to the gas storage tank. When pressurizing the metering chamber, the vacuum pump sends the gas from the gas storage tank to the metering chamber.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects: This utility model is a double-chamber, double-pressure quantitative furnace, which is equipped with a main furnace chamber and a quantitative chamber. By controlling the forward and reverse rotation of the vacuum pump, it achieves rapid and precise molten aluminum filling, solving the problem of slow aluminum filling and meeting the needs of high-frequency, large-volume production. The chute is designed as a tube, reducing the contact between the molten aluminum and air, reducing oxidation reactions, and improving product quality. It achieves efficient, quantitative, and low-consumption transportation of molten aluminum, and is especially suitable for industrial sites such as die casting that require precise quantity control. Injecting inert gas into the main furnace chamber through the air inlet valve creates a positive pressure in the main furnace chamber. Combined with the negative pressure created in the quantitative chamber, a double pressure difference is formed, which greatly accelerates the movement of molten aluminum from the inlet valve into the quantitative chamber, improving the filling efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the dual-chamber dual-pressure quantitative furnace of this utility model;

[0018] Figure 2 This is a schematic diagram of the furnace body.

[0019] Figure 3 As shown Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 This is a schematic diagram of the structure of the lifting furnace frame;

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the dual-chamber dual-pressure quantitative furnace of this utility model.

[0022] In the diagram: 1. Lifting furnace frame, 11. Base plate, 111. Bottom wheel, 112. Support column, 12. Scissor-type telescopic frame, 13. Top plate, 14. Drive mechanism, 2. Furnace body, 21. Main furnace chamber, 22. Metering chamber, 211. Liquid inlet valve, 23. Metering chamber cover, 231. Vacuum pump, 232. Delivery pipe, 2321. Liquid outlet control valve, 2322. Heating system, 24. Furnace cover, 241. Air inlet valve, 25. Liquid inlet channel, 3. Soup filling cover, 4. Heating rod, 5. Gas storage tank, 51. First channel, 511. First valve, 52. Second channel, 521. Second valve. Detailed Implementation

[0023] Example 1

[0024] like Figure 1-2 The diagram illustrates a dual-chamber, dual-pressure metering furnace, comprising a lifting furnace frame 1, with a furnace body 2 connected to the top surface of the lifting furnace frame 1. The furnace body 2 includes a main furnace chamber 21 and a metering chamber 22, which are connected via an inlet valve 211. A metering chamber cover 23 is connected to the top opening of the metering chamber 22, and the metering chamber cover 23 is connected to a vacuum pump 231 and a delivery pipe 232. The delivery pipe 232 is equipped with an outlet control valve 2321, which controls the opening or closing of the delivery pipe 232. The vacuum pump 231 evacuates or pressurizes the metering chamber 22, and the delivery pipe 232 delivers molten aluminum from the metering chamber 22. When the vacuum pump 231 evacuates the metering chamber 22, molten aluminum flows from the main furnace chamber 21 through the inlet valve 211 to the metering chamber 22; when the vacuum pump 231 pressurizes the metering chamber 22, the molten aluminum in the metering chamber 22 is delivered from the delivery pipe 232.

[0025] In this embodiment, a furnace cover 24 is connected to the opening at the top of the furnace body 2. An air inlet valve 241 is connected to the air inlet of the furnace cover 24, and the air inlet valve 241 is connected to an air inlet pipe. When the molten aluminum enters the metering chamber 22 from the main furnace chamber 21, the vacuum pump 231 evacuates the metering chamber 22 and opens the air inlet valve 241 to pressurize the main furnace chamber 21. During the liquid feeding stage, the air inlet valve 241 is opened to inject inert gas into the main furnace chamber 21, so that the main furnace chamber 21 forms a positive pressure. Combined with the negative pressure formed in the metering chamber 22, a double pressure difference is formed, which greatly accelerates the molten aluminum from the liquid inlet valve 211 into the metering chamber 22, improving the liquid feeding efficiency.

[0026] In this embodiment, one end of the delivery pipe 232 is located at the bottom of the metering chamber 22, and the liquid outlet control valve 2321 is located at the bottom end of the delivery pipe 232. The liquid outlet control valve 2321 controls the opening or closing of the delivery pipe 232. The delivery pipe 232 being located at the bottom ensures that the aluminum liquid is drained and ensures the accuracy of liquid delivery.

[0027] In this embodiment, the furnace body 2 is provided with a soup inlet, and a soup inlet cover 3 is provided at the soup inlet. The soup inlet cover 3 and the furnace body 2 are sealed together. In order to ensure the airtightness of the connection between the soup inlet cover 3 and the furnace body 2, a sealing element and a locking mechanism are provided between them. The sealed connection of the soup inlet cover 3 can maintain the positive pressure environment of the main furnace chamber 21 and improve the liquid feeding efficiency from the main furnace chamber 21 to the metering chamber 22.

[0028] In this embodiment, the vacuum pump 231 is a Roots vacuum pump. Roots vacuum pumps are resistant to high temperatures and achieve rapid switching between suction and pressurization modes by controlling the forward and reverse rotation of the motor, meeting the frequent pressure switching requirements for aluminum liquid transportation.

[0029] like Figure 3 The dual-chamber, dual-pressure quantitative furnace shown has a main furnace chamber 21 and a quantitative chamber 22 connected by a liquid inlet channel 25. The liquid inlet channel 25 is vertically arranged, with a liquid inlet valve 211 located at the bottom. The upper opening of the liquid inlet channel 25 is higher than the height of the level gauge installed in the main furnace chamber 21. Since the upper end of the liquid inlet channel 25 is higher than the highest point of the level gauge, when the liquid inlet valve 211 is closed, the liquid level in the liquid inlet channel 25 is higher than the liquid level in the main furnace chamber 21, creating a gas-sealed structure. When liquid is added, the vacuum pump 231 reverses direction to inject gas into the quantitative chamber 22, creating positive pressure in the quantitative chamber 22. At this time, the closed liquid inlet valve 211 and the molten aluminum in the liquid inlet channel 25 form a double seal, preventing gas from leaking from the quantitative chamber 22 into the main furnace chamber 21 and disrupting the pressure environment.

[0030] In this embodiment, a heating rod 4 is provided inside the main furnace chamber 21, extending from the top to the bottom of the main furnace chamber 21. The heating rod 4 penetrates the main furnace chamber 21 to ensure uniform temperature of the molten aluminum.

[0031] In this embodiment, a heating system 2322 is provided on the outside of the conveying pipe 232, and the heating system 2322 is spirally wound around the outer circumference of the conveying pipe 232; an insulation layer is provided on the outside of the heating system 2322, and the insulation layer insulates the conveying pipe 232. The heating system 2322 is an electric heating wire or a heating tube. The heating system 2322 and the insulation layer can maintain the temperature of the conveying pipe 232 and prevent the aluminum liquid from cooling down and solidifying during the conveying process.

[0032] like Figure 4The dual-chamber, dual-pressure quantitative furnace shown includes a lifting frame 1 comprising a base plate 11, a scissor-type telescopic frame 12, a top plate 13, and a drive mechanism 14. The base plate 11 and the top plate 13 are vertically connected by the scissor-type telescopic frame 12. The drive mechanism 14 is connected between the base plate 11 and the top plate 13, driving the top plate 13 to rise or fall. Bottom wheels 111 are rotatably connected to the bottom surface of the base plate 11, and are located at the four corners of the base plate 11. The end of the base plate 11 away from the drive mechanism 14 is connected to a support column 112. When the top plate 13 descends to its lowest point, the support column 112 abuts against the bottom surface of the top plate 13 to provide support. The scissor-type telescopic frame 12 includes two arms connected by a central shaft. One arm has its upper end slidably connected to the top plate 13 and its lower end hinged to the base plate 11; the other arm has its upper end hinged to the top plate 13 and its lower end slidably connected to the base plate 11. The drive mechanism 14 is a linear drive mechanism. It drives the screw sleeve to rotate through the motor. The screw sleeve drives the screw to extend or retract, thereby lifting the furnace body 2 and meeting the liquid delivery requirements of die-casting machines of different heights.

[0033] This utility model includes the following steps:

[0034] Adding molten aluminum: Open the molten aluminum filling cover 3 and pour molten aluminum into the main furnace chamber 21. When the molten aluminum comes into contact with the liquid level sensor in the main furnace chamber 21, the liquid level sensor sends a signal to the control system, which then stops the molten aluminum filling and issues a warning. Close the molten aluminum filling cover 3 and lock it tightly to ensure a sealed connection between the molten aluminum filling cover 3 and the main furnace chamber 21.

[0035] Liquid Inlet: Close the liquid inlet valve 211 and the liquid outlet control valve 2321. The liquid inlet valve 211 isolates the main furnace chamber 21 and the metering chamber 22, and the liquid outlet control valve 2321 seals the delivery pipe 232. Use the vacuum pump 231 to evacuate the metering chamber 22, creating a negative pressure. Open the gas inlet valve 241 to inject inert gas into the main furnace chamber 21, creating a positive pressure. Then open the liquid inlet valve 211. The molten aluminum enters the metering chamber 22 under the combined effect of the positive pressure in the main furnace chamber 21 and the negative pressure in the metering chamber 22. During this process, the vacuum pump 231 continuously evacuates the chamber. When the molten aluminum comes into contact with the liquid level sensor in the metering chamber 22, the liquid level sensor sends a signal to the control system, and the control system closes the vacuum pump 231 and the liquid inlet valve 211.

[0036] Liquid dispensing: Vacuum pump 231 reverses direction to inject gas into metering chamber 22, creating positive pressure in metering chamber 22. Then, the liquid dispensing control valve 2321 is opened, and the aluminum liquid is sent into the die casting machine from the delivery pipe 232 under the action of gas pressure, achieving precise quantitative dispensing.

[0037] Example 2

[0038] The difference between this embodiment and Embodiment 1 is that, as Figure 5The double-chamber, double-pressurized quantitative furnace shown has a gas storage tank 5 on the top of the furnace body 2. The gas storage tank 5 has a first channel 51 and a second channel 52. The first channel 51 and the second channel 52 are respectively equipped with a first valve 511 and a second valve 521. The first channel 51 is connected to the inlet valve 241, and the second channel 52 is connected to the outlet of the vacuum pump 231. When the aluminum liquid enters the quantitative chamber 22 from the main furnace chamber 21, the vacuum pump 231 discharges the gas in the quantitative chamber 22 into the gas storage tank 5.

[0039] The working steps in this embodiment include:

[0040] Adding molten aluminum: Open the molten aluminum filling cover 3 and pour molten aluminum into the main furnace chamber 21. When the molten aluminum comes into contact with the liquid level sensor in the main furnace chamber 21, the liquid level sensor sends a signal to the control system, which then stops the molten aluminum filling and issues a warning. Close the molten aluminum filling cover 3 and lock it tightly to ensure a sealed connection between the molten aluminum filling cover 3 and the main furnace chamber 21.

[0041] Liquid Inlet: Close the liquid inlet valve 211 and the liquid outlet control valve 2321. The liquid inlet valve 211 isolates the main furnace chamber 21 and the metering chamber 22, and the liquid outlet control valve 2321 seals the delivery pipe 232. Use the vacuum pump 231 to evacuate the metering chamber 22, open the first valve 511 to discharge gas into the gas storage tank 5, creating a negative pressure in the metering chamber 22. Simultaneously open the gas inlet valve 241 and the second valve 521, injecting high-pressure gas from the gas storage tank 5 into the main furnace chamber 21, creating a positive pressure in the main furnace chamber 21. Then open the liquid inlet valve 211, and the molten aluminum enters the metering chamber 22 under the combined action of the positive pressure in the main furnace chamber 21 and the negative pressure in the metering chamber 22. During this process, the vacuum pump 231 continuously evacuates the chamber. When the molten aluminum comes into contact with the liquid level sensor in the metering chamber 22, the liquid level sensor sends a signal to the control system, and the control system closes the vacuum pump 231 and the liquid inlet valve 211.

[0042] Liquid Discharge: Close the first valve 511 and open the second valve 521. The vacuum pump 231 reverses to inject gas from the gas storage tank 5 into the metering chamber 22, creating positive pressure in the metering chamber 22. Then, the liquid discharge control valve 2321 is opened, and the molten aluminum is sent from the delivery pipe 232 into the die-casting machine under gas pressure, achieving precise metering. During this process, the gas storage tank 5 drops to the threshold, and the gas replenishment system connected to the gas storage tank 5 replenishes the gas storage tank 5 with inert gas.

[0043] The gas storage tank 5 is connected to a gas replenishment system via a pipeline. When the pressure inside the gas storage tank 5 drops and the pressure gauge reading in the gas storage tank 5 drops to the set value, the gas replenishment system replenishes inert gas into the gas storage tank.

[0044] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A dual chamber dual pressurized dosing oven characterized by: The system includes a lifting furnace frame (1), the top surface of which is connected to a furnace body (2). The furnace body (2) includes a main furnace chamber (21) and a metering chamber (22), which are connected by a liquid inlet valve (211). A metering chamber cover (23) is connected to the top opening of the metering chamber (22), and the metering chamber cover (23) is connected to a vacuum pump (231) and a delivery pipe (232). The delivery pipe (232) is equipped with a liquid outlet control valve (2321). The valve (2321) controls the opening or closing of the delivery pipe (232); the vacuum pump (231) evacuates or pressurizes the metering chamber (22), and the delivery pipe (232) sends the molten aluminum out of the metering chamber (22); when the vacuum pump (231) evacuates the metering chamber (22), the molten aluminum flows from the main furnace chamber (21) through the liquid inlet valve (211) to the metering chamber (22); when the vacuum pump (231) pressurizes the metering chamber (22), the molten aluminum in the metering chamber (22) is sent out from the delivery pipe (232).

2. The dual chamber dual pressurized dosing oven of claim 1, wherein: The furnace body (2) has a furnace cover (24) connected to the top opening. The furnace cover (24) has an air inlet and an air inlet valve (241) connected to it. The air inlet valve (241) is connected to the air inlet pipe. When the aluminum liquid enters the metering chamber (22) from the main furnace chamber (21), the vacuum pump (231) evacuates the metering chamber (22) and opens the air inlet valve (241) to pressurize the main furnace chamber (21).

3. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: One end of the delivery pipe (232) is located at the bottom of the metering chamber (22), and the liquid discharge control valve (2321) is located at the bottom end of the delivery pipe (232).

4. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: The main furnace chamber (21) and the metering chamber (22) are connected by a liquid inlet channel (25). The liquid inlet channel (25) is vertically arranged, and the liquid inlet valve (211) is located at the bottom of the liquid inlet channel (25). The upper opening of the liquid inlet channel (25) is higher than the height of the liquid level gauge installed in the main furnace chamber (21).

5. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: The furnace body (2) is provided with a soup inlet, and a soup inlet cover (3) is provided at the soup inlet. The soup inlet cover (3) and the furnace body (2) are sealed together.

6. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: The lifting furnace frame (1) includes a base plate (11), a scissor-type telescopic frame (12), a top plate (13), and a drive mechanism (14). The base plate (11) and the top plate (13) are connected by the scissor-type telescopic frame (12) in a height-lowering manner. The drive mechanism (14) is connected between the base plate (11) and the top plate (13) and drives the top plate (13) to rise or fall. The bottom surface of the base plate (11) is rotatably connected with a bottom wheel (111), which is located at the four corners of the base plate (11). The end of the base plate (11) away from the drive mechanism (14) is connected to a support column (112). When the top plate (13) is lowered to the lowest point, the support column (112) abuts against the bottom surface of the top plate (13) to form support.

7. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: The vacuum pump (231) is a Roots vacuum pump.

8. The dual-chamber, dual-pressure quantitative furnace according to claim 1, characterized in that: The main furnace chamber (21) is equipped with a heating rod (4), which extends from the top of the main furnace chamber (21) to the bottom of the main furnace chamber (21).

9. The dual-chamber, dual-pressure quantitative furnace according to claim 8, characterized in that: A heating system (2322) is provided on the outside of the conveying pipe (232), and the heating system (2322) is spirally wound around the outer periphery of the conveying pipe (232); an insulation layer is provided on the outside of the heating system (2322), and the insulation layer provides insulation for the conveying pipe (232).

10. The dual-chamber, dual-pressure quantitative furnace according to claim 2, characterized in that: The furnace body (2) is provided with a gas storage tank (5) at the top. The gas storage tank (5) is provided with a first channel (51) and a second channel (52). The first channel (51) and the second channel (52) are respectively provided with a first valve (511) and a second valve (521). The first channel (51) is connected to the inlet valve (241), and the second channel (52) is connected to the outlet of the vacuum pump (231). When the aluminum liquid enters the metering chamber (22) from the main furnace chamber (21), the vacuum pump (231) discharges the gas in the metering chamber (22) into the gas storage tank (5).

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