Device for preventing mutual interference of double electron beams

Abstract

The utility model discloses a device for preventing mutual interference of double electron beams, and belongs to the technical field of metal smelting. A device for preventing mutual interference of double electron beams comprises a first port and a second port, the diameter of the first port is smaller than that of the second port, and the first port and the second port are connected through a reflecting surface to form a hollow rotary body; the connecting piece is arranged on the first port and is used for being mounted at a transmitting end of an electron beam; according to the utility model, the interference of electron beams is reduced by guiding and shielding a complex electromagnetic field in a furnace, the first port is adopted as an inlet end with a smaller diameter and is tightly connected with an outlet of an electron gun, and the second port is adopted as an outlet end with a larger diameter, so that the electron beams can be stably expanded and transmitted when passing through the horn mouth; meanwhile, reflection and scattering of electron beams on the inner wall of the horn mouth are reduced, mutual interference of double-gun electron beams is effectively reduced, beam running is avoided, and the production risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and in particular to a device for preventing mutual interference between two electron beams. Background Technology

[0002] Electron beam furnaces are currently widely used in the smelting of high-temperature refractory metals and high-purity metals. Electron beam melting utilizes the heating of a cathode block from a filament. Electrons emitted from the surface of the cathode block are accelerated by a high-voltage electric field and, through the combined action of focusing and scanning power, form a high-energy electron beam that bombards the surface of the material. During the collision process, most of the electron kinetic energy is converted into the thermal energy of the material, thereby generating a huge amount of energy to melt the material. Electron beam melting has advantages such as high energy density and customizable scanning patterns.

[0003] In electron beam melting equipment, the electron beam's trajectory is mainly controlled by focusing, deflection, and scanning power supplies, while its energy density is controlled by the emission current and accelerating electric field. When using a single gun or when the power of a dual gun is less than 300KW, the electron beam can be well controlled. However, when using high-power electron beam furnaces with dual guns working together, the two electron beams are emitted from the top of the equipment and enter the furnace cavity in the same direction, generating the same magnetic field. Since the same magnetic field repels each other, there is a certain interference between the two electron beams, which can easily cause melting accidents. Utility Model Content

[0004] The purpose of this invention is to solve the problem of mutual interference between two electron beams when they work together in the prior art, and to propose a device to prevent mutual interference between the two electron beams.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for preventing interference between two electron beams includes: a first port and a second port, wherein the diameter of the first port is smaller than that of the second port, and the first port and the second port are connected by a reflective surface to form a hollow rotating body; and a connector disposed on the first port for mounting at the emitting end of the electron beam.

[0007] Preferably, the axes of the first port and the second port coincide.

[0008] Furthermore, the angle between the generatrix and the axis of the rotating body structure is α, and the value of α ranges from 15° to 30°.

[0009] Preferably, the connector includes a flange, the inner circle of which is fixedly connected to the outer circle of the first port, and a through hole is provided on the flange.

[0010] Furthermore, the through holes are provided in multiple sets and are equidistantly arranged in a circle on the flange.

[0011] Preferably, the material of the rotating body is an iron-carbon alloy.

[0012] Compared with the prior art, this utility model provides a device to prevent mutual interference between two electron beams, which has the following beneficial effects:

[0013] 1. The device for preventing mutual interference between the two electron beams uses a rotating body made of an iron-carbon alloy, such as iron or steel. This alloy has good magnetic permeability and high mechanical strength, enabling it to withstand the high temperatures and various mechanical stresses within the EB electron beam melting furnace. Furthermore, it exhibits certain oxidation resistance at high temperatures, resisting the oxidation and corrosion of materials by the high-temperature environment within the melting furnace. The inner surface of the rotating body is coated with a high-temperature resistant and oxidation-resistant coating, such as nickel, chromium, or chromium alloy plating, further enhancing its high-temperature resistance and service life. Compared to some special metal materials, such as copper and molybdenum, iron has a relatively low cost. In large-scale production and application, using an iron bell-shaped nozzle can reduce equipment manufacturing costs and improve economic efficiency. Simultaneously, iron resources are abundant and supply is stable, which helps ensure the continuity and stability of production.

[0014] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model reduces interference from the electron beam by guiding and shielding the complex electromagnetic field inside the furnace. The first port has a smaller diameter inlet end and is tightly connected to the electron gun outlet, while the second port has a larger diameter outlet end. This ensures that the electron beam can expand and transmit smoothly when passing through the flared mouth, while reducing reflection and scattering of the electron beam on the inner wall of the flared mouth. This effectively reduces mutual interference between the two electron beams, avoids beam slippage, and reduces production risks. Attached Figure Description

[0015] Figure 1 This is a first-view structural schematic diagram of a device for preventing mutual interference between two electron beams proposed in this utility model.

[0016] Figure 2 This is a second-view structural schematic diagram of a device for preventing mutual interference between two electron beams proposed in this utility model.

[0017] Figure 3 This is a cross-sectional structural schematic diagram of a device for preventing mutual interference between two electron beams proposed in this utility model.

[0018] In the diagram: 1. First port; 2. Second port; 3. Flange; 4. Through hole. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Example:

[0022] Reference Figures 1-3 A device for preventing interference between two electron beams includes: a first port 1 and a second port 2, wherein the diameter of the first port 1 is smaller than that of the second port 2, and the first port 1 and the second port 2 are connected by a reflective surface to form a hollow rotating body; and a connector disposed on the first port 1 for mounting at the emitting end of the electron beam.

[0023] This scheme reduces electron beam interference by guiding and shielding the complex electromagnetic field inside the furnace. The first port 1 has a smaller diameter inlet end and is tightly connected to the electron gun outlet, while the second port 2 has a larger diameter outlet end. This ensures that the electron beam can expand and transmit smoothly when passing through the horn mouth, while reducing the reflection and scattering of the electron beam on the inner wall of the horn mouth. This effectively reduces mutual interference between the two electron beams, avoids beam slippage, and reduces production risks.

[0024] The axes of the first port 1 and the second port 2 coincide, ensuring that the whole structure forms a standard conical shape.

[0025] The angle between the generatrix and the axis of the rotating body structure is α, and the value of α ranges from 15° to 30°. Here, 30° is preferred to ensure that the electron beam can expand and transmit smoothly when passing through the horn mouth, while reducing the reflection and scattering of the electron beam on the inner wall of the horn mouth.

[0026] The connector includes a flange 3, the inner circle of which is fixedly connected to the outer circle of the first port 1, and a through hole 4 is provided on the flange 3.

[0027] There are 3 to 9 through holes 4, and the preferred option in this scheme is 6, which are equidistantly arranged in a circle on the flange 3.

[0028] The rotating body is made of an iron-carbon alloy, such as iron or steel, which has good magnetic permeability and high mechanical strength. It can withstand the high temperature and various mechanical stresses in the EB electron beam melting furnace. Moreover, it has certain oxidation resistance at high temperatures, which can resist the oxidation and corrosion of materials by the high temperature environment in the melting furnace to a certain extent. Furthermore, the inner surface of the rotating body is coated with a high temperature-resistant and oxidation-resistant coating, such as nickel, chromium, and chromium alloy plating, which can further improve its high temperature resistance and service life. Compared with some special metal materials, such as copper and molybdenum, iron has a relatively low cost. In large-scale production and application, using iron bell mouths can reduce the manufacturing cost of equipment and improve economic efficiency. At the same time, iron resources are abundant and the supply is stable, which is conducive to ensuring the continuity and stability of production.

[0029] In this invention, the flange 3 is fixed to the electron beam emitting end using bolts. During the melting process, the flared mouth can withstand various forces such as the impact of the electron beam, the scouring of high-temperature gas, and the vibration of the furnace body. The high strength characteristics of the iron-carbon alloy ensure that the flared mouth maintains the stability and integrity of the structure under harsh working conditions and will not be easily deformed or damaged, thereby ensuring the stability and reliability of electron beam transmission.

[0030] 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 device for preventing mutual interference between two electron beams, characterized in that, include: The first port (1) and the second port (2) have a smaller diameter than the second port (2). The first port (1) and the second port (2) are connected by a reflective surface to form a hollow rotating body; A connector is provided on the first port (1) for installation at the electron beam emitting end.

2. The device for preventing mutual interference between two electron beams according to claim 1, characterized in that, The axes of the first port (1) and the second port (2) coincide.

3. The device for preventing mutual interference between two electron beams according to claim 2, characterized in that, The angle between the generatrix and the axis of the rotating body structure is α, and the value of α ranges from 15° to 30°.

4. The device for preventing mutual interference between two electron beams according to claim 1, characterized in that, The connector includes a flange (3), the inner circle of which is fixedly connected to the outer circle of the first port (1), and a through hole (4) is provided on the flange (3).

5. The device for preventing mutual interference between two electron beams according to claim 4, characterized in that, The through holes (4) are provided in multiple sets and are arranged equidistantly on the flange (3).

6. The device for preventing mutual interference between two electron beams according to claim 1, characterized in that, The rotating body is made of an iron-carbon alloy.

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