Protection device for magnesium alloy vacuum melting

Abstract

The utility model relates to the technical field of vacuum melting, in particular to a protection device for magnesium alloy vacuum melting, which comprises a two-stage rotary vane vacuum pump, a roots vacuum pump, a low-vacuum electromagnetic pressure difference inflation valve, a vacuum stop valve, a vacuum pipeline, a pressure air storage tank and a vacuum ball valve. A low-vacuum electromagnetic pressure difference inflation valve is connected between the two-stage rotary vane vacuum pump and the roots vacuum pump, a vacuum stop valve is connected above the roots vacuum pump, the top of the vacuum stop valve is connected with a vacuum pipeline, the right side of the vacuum pipeline is connected with a pressure air storage tank, and the right side of the pressure air storage tank is connected with a vacuum ball valve. And meanwhile, high-temperature magnesium liquid or gas is prevented from entering the two-stage rotary vane vacuum pump and the roots vacuum pump, so that the overall safety of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum melting technology, and in particular to a protective device for vacuum melting of magnesium alloys. Background Technology

[0002] Vacuum melting of magnesium alloys can reduce the content of gases and impurities in magnesium alloys, thereby improving the purity and quality of the alloy. However, it is difficult to achieve vacuum melting of magnesium alloys using traditional manual processes.

[0003] Existing smelting equipment involves placing magnesium alloy raw materials into a vacuum smelting apparatus, then evacuating to the required vacuum level. The magnesium alloy is then heated above its melting point using heating elements to melt it. During the smelting process, stirring or other methods can be used to promote uniform mixing of the magnesium alloy. After smelting, the molten magnesium alloy is cooled and solidified to obtain the desired magnesium alloy material.

[0004] However, existing smelting equipment has certain safety hazards in actual operation. High-temperature molten magnesium or gas can easily enter the pump unit, causing damage. This not only reduces smelting efficiency but also increases operational risks. Furthermore, the vacuum level in existing equipment is unstable, leading to the introduction of gases and impurities. Therefore, it is necessary to develop a protective device for vacuum smelting of magnesium alloys that can effectively protect the pump unit and prevent the entry of high-temperature molten magnesium or gas, thereby improving the safety and reliability of the smelting process. Utility Model Content

[0005] The purpose of this invention is to provide a protective device for vacuum melting of magnesium alloys, which aims to solve the problem that high-temperature molten magnesium or gas can easily enter the pump group during the use of existing melting equipment, thereby causing damage to the pump group and reducing the safety of the melting process.

[0006] To achieve the above objectives, this utility model provides a protective device for vacuum melting of magnesium alloys, comprising a two-stage rotary vane vacuum pump, a Roots vacuum pump, a low-vacuum electromagnetic differential pressure charging valve, a vacuum shut-off valve, a vacuum pipeline, a pressurized air storage tank, and a vacuum ball valve. The low-vacuum electromagnetic differential pressure charging valve is connected between the two-stage rotary vane vacuum pump and the Roots vacuum pump. The vacuum shut-off valve is connected above the Roots vacuum pump. The vacuum pipeline is connected to the top of the vacuum shut-off valve. The pressurized air storage tank is connected to the right side of the vacuum pipeline. The vacuum ball valve is connected to the right side of the pressurized air storage tank.

[0007] The protective device for vacuum melting of magnesium alloys also includes an electric contact vacuum gauge, which is connected to the Roots vacuum pump and located on one side of the Roots vacuum pump.

[0008] The vacuum pipeline is connected to the vacuum shut-off valve by a flange seal; the vacuum pipeline is connected to the pressurized air storage tank by a flange seal; and the pressurized air storage tank is connected to the vacuum ball valve by a flange seal.

[0009] The vacuum pipe connection port is located on the lower side of the pressurized air storage tank; the vacuum ball valve connection port is located on the upper side of the pressurized air storage tank.

[0010] The diameter of the vacuum pipe is ф50mm.

[0011] The volume of the pressurized air storage tank is 718L.

[0012] This utility model discloses a protective device for vacuum melting of magnesium alloys. It can provide a stable pressure source through a pressurized air storage tank, while preventing high-temperature molten magnesium or gas from entering the two-stage rotary vane vacuum pump and the Roots vacuum pump, thereby improving the overall safety of the device. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of the protective device for vacuum melting of magnesium alloy according to the first embodiment of this utility model.

[0015] In the diagram: 101-Two-stage rotary vane vacuum pump, 102-Roots vacuum pump, 103-Low vacuum electromagnetic differential pressure charging valve, 104-Vacuum shut-off valve, 105-Vacuum pipeline, 106-Pressure air storage tank, 107-Vacuum ball valve, 108-Electrical contact vacuum gauge. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0017] The first embodiment of this application is:

[0018] Please see Figure 1 ,in Figure 1 This is a schematic diagram of the structure of the protective device for vacuum melting of magnesium alloy according to the first embodiment of this utility model.

[0019] This utility model provides a protective device for vacuum melting of magnesium alloys, including a two-stage rotary vane vacuum pump 101, a Roots vacuum pump 102, a low-vacuum electromagnetic differential pressure charging valve 103, a vacuum shut-off valve 104, a vacuum pipeline 105, a pressurized air storage tank 106, a vacuum ball valve 107, and an electrical contact vacuum gauge 108. The aforementioned solution solves the problem that in existing melting equipment, high-temperature molten magnesium or gas can easily enter the pump unit during use, causing damage to the pump unit and reducing safety during the melting process. It is understood that the aforementioned solution can be used in situations where protection of the pump unit during melting is required.

[0020] In this embodiment, a stable pressure source can be provided by the pressurized air storage tank 106, while preventing high-temperature molten magnesium or gas from entering the two-stage rotary vane vacuum pump 101 and the Roots vacuum pump 102.

[0021] The low-vacuum electromagnetic differential pressure charging valve 103 connects the two-stage rotary vane vacuum pump and the Roots vacuum pump. A vacuum shut-off valve 104 is connected above the Roots vacuum pump. The top of the vacuum shut-off valve 104 is connected to the vacuum pipeline 105. The right side of the vacuum pipeline 105 is connected to the pressurized air tank 106. The right side of the pressurized air tank 106 is connected to the vacuum ball valve 107. The vacuum pipeline 105 and the vacuum shut-off valve 104, the vacuum pipeline 105 and the pressurized air tank 106, and the pressurized air tank 107 are all connected together. The pressurized air storage tank 106 and the vacuum ball valve 107 are both connected by flange seals. The flange end has a right-hand groove, and the flange connection is sealed with graphite packing. The connection port of the vacuum pipe 105 is located on the lower side of the pressurized air storage tank 106; the connection port of the vacuum ball valve 107 is located on the upper side of the pressurized air storage tank 106. Through the combined use of the two-stage rotary vane vacuum pump 101 and the Roots vacuum pump 102, and the stable pressure source provided by the pressurized air storage tank 106, the device can maintain a stable vacuum environment. By reducing the contact between the molten magnesium and the gas and the pump assembly, the device helps reduce the gas and impurity content in the magnesium alloy, thereby improving the purity and quality of the alloy. The hemispherical and cylindrical design of the pressurized air storage tank 106, along with the bottom support, provides good structural stability, which helps maintain the stability of the equipment during the smelting process and reduces efficiency losses caused by equipment instability. In summary, this protective device for vacuum melting of magnesium alloys improves melting efficiency in multiple ways, including providing a stable vacuum environment, protecting the pump set, improving melting quality, precisely controlling pressure, and reducing maintenance and downtime. It can provide a stable pressure source through the pressurized air tank 106, while preventing high-temperature molten magnesium or gas from entering the two-stage rotary vane vacuum pump 101 and the Roots vacuum pump 102, thereby improving the overall safety of the device.

[0022] Secondly, the electric contact vacuum gauge 108 is connected to the Roots vacuum pump 102 and is located on one side of the Roots vacuum pump 102. The electric contact vacuum gauge 108 is connected to the side of the Roots vacuum pump 102. The threaded connection of the electric contact vacuum gauge 108 is sealed with hemp rope and Teflon tape. The pressure level of the pressurized air storage tank 106 can be controlled through the electric contact vacuum gauge 108.

[0023] Finally, the vacuum pipe 105 has a diameter of ф50mm, the pressurized air storage tank 106 has a volume of 718L, the pressurized air storage tank 106 is hemispherical at the top and bottom, cylindrical in the middle, and has a support at the bottom.

[0024] When using a protective device for vacuum melting of magnesium alloys according to this embodiment,

[0025] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A protective device for vacuum melting of magnesium alloys, characterized in that, The system includes a two-stage rotary vane vacuum pump, a Roots vacuum pump, a low-vacuum electromagnetic differential pressure charging valve, a vacuum shut-off valve, a vacuum pipeline, a pressurized air tank, and a vacuum ball valve. The low-vacuum electromagnetic differential pressure charging valve connects the two-stage rotary vane vacuum pump and the Roots vacuum pump. The vacuum shut-off valve is connected above the Roots vacuum pump. The vacuum pipeline is connected to the top of the vacuum shut-off valve. The pressurized air tank is connected to the right side of the vacuum pipeline. The vacuum ball valve is connected to the right side of the pressurized air tank.

2. The protective device for vacuum melting of magnesium alloys as described in claim 1, characterized in that, The protective device for vacuum melting of magnesium alloys also includes an electric contact vacuum gauge, which is connected to the Roots vacuum pump and located on one side of the Roots vacuum pump.

3. The protective device for vacuum melting of magnesium alloys as described in claim 1, characterized in that, The vacuum pipeline is connected to the vacuum shut-off valve by a flange seal; the vacuum pipeline is connected to the pressurized air storage tank by a flange seal; and the pressurized air storage tank is connected to the vacuum ball valve by a flange seal.

4. The protective device for vacuum melting of magnesium alloys as described in claim 1, characterized in that, The vacuum pipe connection port is located on the lower side of the pressurized air storage tank; the vacuum ball valve connection port is located on the upper side of the pressurized air storage tank.

5. The protective device for vacuum melting of magnesium alloys as described in claim 1, characterized in that, The diameter of the vacuum pipe is ф50mm.

6. The protective device for vacuum melting of magnesium alloys as described in claim 1, characterized in that, The volume of the pressurized air storage tank is 718L.

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