Arc discharge chamber heater
By putting multiple ceramic section tubes on the heating wire of the arc discharge chamber heater, the problem of uneven heating temperature of traditional heaters at high temperatures is solved, and a more uniform heating effect is achieved, reducing the impact on the arc starting process.
Patent Information
- Application Number
- CN202421730338.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-20
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-20
AI Technical Summary
When traditional arc discharge chamber heaters are used at high temperatures, the heat dissipation area of nickel-chromium wires is insufficient, resulting in the broken ceramic tubes and uneven heating temperatures, which affects the arcing process.
An arc discharge chamber heater is designed, and multiple ceramic joint tube sleeves are arranged on the heating wire. The ceramic joint tubes are arranged in sequence along the length of the heating wire, and the crucible outlet end is heated through the heating wire to ensure that the heating wire is heated evenly.
By increasing the heat dissipation area of the ceramic section tube, the possibility of ceramic fragmentation is reduced, the heating wire is kept in a uniform heating state, ensuring that the temperature in the arc discharge chamber reaches above 800℃, reducing the possibility of cooling and condensation of ytterbium chloride steam, and thus reducing the impact on the arc starting process.
Smart Images
Figure CN222855099U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of stable isotope electromagnetic separators, and in particular to an arc discharge chamber heater. Background Art
[0002] The traditional crucible is threadedly connected to the arc discharge chamber. After the crucible is heated, the ytterbium chloride vapor passes through the boat plate and the gas distribution plate to the ionization chamber of the arc discharge chamber. The filament emits electrons and rotates into the arc discharge chamber under the action of the magnetic field and the electric field to ionize the ytterbium chloride vapor to form plasma. The temperature at the crucible outlet must be guaranteed to be above 800°C, otherwise the evaporated ytterbium chloride vapor will cool and condense at the interface, affecting the arc starting process. Therefore, a heater is provided in the arc discharge chamber. The heater is designed to be sleeved on the shell of the ionization chamber and four parallel nickel-chromium heating wires. The four parallel nickel-chromium wires are evenly distributed on both sides of the ionization chamber. The nickel-chromium wire sleeve is provided with a ceramic tube for insulation.
[0003] The four nickel-chromium wires can only reach the required temperature of more than 800°C when the current used to heat them in the arc discharge chamber is increased to 55A. The current demand is large, and the heat dissipation area of the nickel-chromium wires is insufficient, resulting in the breakage of the ceramic tube and the uneven distribution of the nickel-chromium wires in the arc discharge chamber. This in turn makes the heating temperature in the arc discharge chamber uneven, which may cause the ytterbium chloride vapor to cool and condense, affecting the arc starting process. Utility Model Content
[0004] In order to reduce the influence of uneven heating temperature on the arc starting process, the utility model provides an arc discharge chamber heater.
[0005] The utility model provides an arc discharge chamber heater adopting the following technical solution:
[0006] An arc discharge chamber heater comprises a shell connected to a crucible, an ionization chamber is arranged in the shell and communicated with the crucible, heating wires are arranged on both sides of the ionization chamber, the heating wires are connected to the shell and are used to heat the temperature in the arc discharge chamber to above 800°C, a plurality of ceramic joint tubes are sleeved on the heating wires, the plurality of ceramic joint tubes are arranged in sequence along the length direction of the heating wires, and the plurality of ceramic joint tubes are connected end to end.
[0007] By adopting the above technical solution, the outlet end of the crucible is heated by the heating wire. The ceramic joint tube has insulation properties. The existence of the ceramic joint tube can effectively protect the heating wire. The design of multiple ceramic joint tubes increases the heat dissipation area and reduces the possibility of ceramic breakage, thereby keeping the heating wire in a uniformly heated state, making the temperature in the arc discharge chamber reach above 800°C, reducing the possibility of cooling and condensation of ytterbium chloride vapor, and thus reducing the impact on the arc starting process.
[0008] Preferably, the length of the ceramic tube section is less than the minimum fracture threshold of the ceramic tube length.
[0009] By adopting the above technical solution, during the heating process of the heating wire, the design of the length of the ceramic tube section further reduces the possibility of the ceramic tube section breaking, thereby improving the reliability of the heater.
[0010] Preferably, a first connecting member and a second connecting member are provided on both sides of the ionization chamber, the first connecting member and the second connecting member are both connected to the shell, the heating wire, the first connecting member and the second connecting member located on the same side of the ionization chamber are a group, the heating wire is suspended, and the heating wires in the same group are connected to the shell through the cooperation of the first connecting member and the second connecting member.
[0011] By adopting the above technical solution, the heating wire heats the air, making the heating of the ionization chamber more uniform, so that the temperature at all locations in the arc discharge chamber reaches above 800°C, reducing the possibility of cooling and condensing of ytterbium chloride vapor, thereby reducing the impact on the arc starting process.
[0012] Preferably, the heating wires in the same group are staggeredly connected between the first connecting member and the second connecting member, and the heating wires are distributed in a continuous S shape.
[0013] By adopting the above technical solution, the heating wires are continuously distributed in an S-shape, so that the heating wires can be more evenly distributed in the ionization chamber, thereby achieving a more uniform heating effect. At the same time, the current required by the heating wires is reduced, the current margin of the arc discharge chamber heating power supply is increased, and the risk of damage to the arc discharge chamber heater power supply is reduced.
[0014] Preferably, a plurality of first through holes are provided on the first connecting member, the first connecting member includes a first insulating block and a first grooved plate, the first grooved plate is covered on the outside of the first insulating block, the first grooved plate is connected to the shell, the first through holes are penetrated through the first grooved plate and the first insulating block, the heating wire passes through the plurality of first through holes, so as to realize continuous S-shaped distribution of the heating wire.
[0015] By adopting the above technical solution, through the combined design of the first insulating block and the first grooved plate, a good insulation effect can be provided while ensuring the stable connection of the heating wire. This design not only improves the safety of the heater, but also prolongs the service life of the heater.
[0016] Preferably, a plurality of second through holes are provided on the second connecting member, the second connecting member includes a second insulating block and a second grooved plate, the second grooved plate is covered on the outside of the second insulating block, the second grooved plate is connected to the shell, the second through holes are penetrated through the second grooved plate and the second insulating block, the heating wire passes through the plurality of second through holes, so as to realize continuous S-shaped distribution of the heating wire.
[0017] By adopting the above technical solution, through the combined design of the second insulating block and the second grooved plate, a good insulation effect can be provided while ensuring the stable connection of the heating wire. This design not only improves the safety of the heater, but also prolongs the service life of the heater.
[0018] Preferably, the heating wire is a molybdenum wire.
[0019] By adopting the above technical solution, the molybdenum wire has a high melting point, high thermal stability and good electrical conductivity, and can work stably in a high temperature environment.
[0020] Preferably, the heating wires on both sides of the ionization chamber are arranged correspondingly.
[0021] By adopting the above technical solution, the correspondingly arranged heating wires make the temperature on both sides of the ionization chamber more evenly heated, and the temperature at all places in the arc discharge chamber reaches above 800°C, reducing the possibility of cooling and condensing of ytterbium chloride vapor, thereby reducing the impact on the arc starting process.
[0022] Preferably, one end of the heating wire is electrically connected to the positive electrode of the power supply, and the other end is electrically connected to the negative electrode of the power supply, and the heating wires on both sides of the ionization chamber are arranged in parallel.
[0023] By adopting the above technical solution, the parallel heating wires can generally provide a more uniform temperature distribution. Because each heating wire carries less current, the heat distribution may be more uniform, preventing some areas from being too hot or too cold.
[0024] In summary, the utility model has the following beneficial effects:
[0025] 1. The outlet end of the crucible is heated by a heating wire. The ceramic tube has insulation properties. The existence of the ceramic tube can effectively protect the heating wire. The design of multiple ceramic tubes increases the heat dissipation area and reduces the possibility of ceramic breakage, thereby keeping the heating wire in a uniformly heated state, making the temperature in the arc discharge chamber reach above 800°C, reducing the possibility of cooling and condensation of ytterbium chloride vapor, and thus reducing the impact on the arc starting process.
[0026] 2. The heating wire is distributed in a continuous S-shape, so that the heating wire is more evenly distributed in the ionization chamber, thereby achieving a more uniform heating effect. The possibility of cooling and condensation of ytterbium chloride vapor is reduced, thereby reducing the impact on the arc starting process; at the same time, the current required for the heating wire is reduced, and the current margin of the arc discharge chamber heating power supply is increased, reducing the risk of damage to the arc discharge chamber heater power supply. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The utility model is a schematic diagram of the overall structure of an arc discharge chamber heater.
[0028] Figure 2Intended to show the location of the heating wire inside the housing.
[0029] Figure 3 Aims to show the distribution of two heating wires.
[0030] Figure 4 It is a schematic diagram of the explosion between the heating wire and the first insulating block and the second insulating block.
[0031] Description of reference numerals:
[0032] 1. Crucible; 2. Ionization chamber; 3. Shell; 4. First connecting piece; 41. First insulating block; 42. First grooved plate; 5. First through hole; 6. Second connecting piece; 61. Second insulating block; 62. Second grooved plate; 7. Second through hole; 8. Heating wire; 9. Ceramic node tube. DETAILED DESCRIPTION
[0033] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0034] An arc discharge chamber heater, referring to Figure 1 and Figure 2 , comprising a shell 3, the shell 3 is threadedly connected to the crucible 1, and the ionization chamber 2 is arranged in the shell 3 and communicated with the crucible 1. Heating wires 8 are arranged on both sides of the ionization chamber 2, the heating wires 8 are connected to the shell 3 and are spaced apart from the ionization chamber 2, and are used to heat the temperature inside the arc discharge chamber to above 800°C. A plurality of ceramic joint tubes 9 are sleeved on the heating wire 8, and the plurality of ceramic joint tubes 9 are arranged in sequence along the length direction of the heating wire 8, and the plurality of ceramic joint tubes 9 are butted end to end.
[0035] When in use, the outlet end of the crucible 1 is heated by the heating wire 8. The ceramic node tube 9 is insulating. The existence of the ceramic node tube 9 can effectively protect the heating wire 8. The design of multiple ceramic node tubes 9 increases the heat dissipation area and reduces the possibility of ceramic breakage, thereby keeping the heating wire 8 in a uniformly heated state, making the temperature in the arc discharge chamber reach above 800°C, reducing the possibility of cooling and condensation of ytterbium chloride vapor, and thus reducing the impact on the arc starting process.
[0036] Reference Figure 2 , the length of the ceramic section tube 9 is less than the minimum fracture threshold of the ceramic tube length.
[0037] Specifically, the minimum threshold of the length of the ceramic tube is calculated based on actual usage. If the length of the ceramic tube section 9 is greater than or equal to the minimum threshold of the length of the ceramic tube, the ceramic tube section 9 will break during the heating process of the heating wire 8. The length of the ceramic tube section 9 is preferably 7 mm.
[0038] The design of the length of the ceramic tube section 9 further reduces the possibility of the ceramic tube section 9 breaking, thereby improving the reliability of the heater.
[0039] Reference Figure 1 and Figure 2 , a first connecting member 4 and a second connecting member 6 are provided on both sides of the ionization chamber 2. The first connecting member 4, the second connecting member 6 and the heating wire 8 located on the same side of the ionization chamber 2 are set as a group. The first connecting member 4 and the second connecting member 6 in the same group correspond to the two ends of the ionization chamber 2 one by one.
[0040] Reference Figure 2 and Figure 3 , two first connecting members 4 are correspondingly arranged on the shell 3, two second connecting members 6 are correspondingly arranged on the shell 3, and two heating wires 8 are correspondingly arranged in positions.
[0041] Reference Figure 2 and Figure 3 The heating wire 8 is suspended and fixedly connected to the shell 3 through the first connecting member 4 and the second connecting member 6 in the same group.
[0042] The correspondingly arranged heating wire 8 makes the temperature on both sides of the ionization chamber 2 more evenly heated, and the heating wire 8 is suspended to heat the air, so that the heating of the ionization chamber 2 is more evenly received, and the temperature at each location in the arc discharge chamber reaches above 800°C, reducing the possibility of cooling and condensation of ytterbium chloride vapor, thereby reducing the impact on the arc starting process.
[0043] Reference Figure 2 and Figure 3 The first connecting member 4 includes a first insulating block 41 and a first grooved plate 42. The first insulating block 41 is in a rectangular parallelepiped shape, and the first grooved plate 42 is in a C-shape. The first grooved plate 42 covers the outer side of the first insulating block 41. The first grooved plate 42 is fixedly connected to the housing 3, and both free ends of the first grooved plate 42 are away from the housing 3.
[0044] The first grooved plate 42 protects the first insulating block 41 from being damaged and provides support for the heating wire 8 at the same time.
[0045] Reference Figure 2 and Figure 4 The first connecting member 4 is provided with a first through hole 5, which passes through the first insulating block 41 and the first slotted plate 42. In this embodiment, four first through holes 5 are provided. In other embodiments, the specific number of the first through holes 5 can be determined according to actual conditions. The four first through holes 5 are arranged at equal intervals along the length direction of the first insulating block 41.
[0046] Reference Figure 2 and Figure 3The second connecting member 6 includes a second insulating block 61 and a second grooved plate 62. The second insulating block 61 is in a rectangular parallelepiped shape, and the second grooved plate 62 is in a C-shape. The second grooved plate 62 covers the outer side of the second insulating block 61. The second grooved plate 62 is fixedly connected to the housing 3, and both free ends of the second grooved plate 62 are away from the housing 3.
[0047] The second grooved plate 62 protects the second insulating block 61 from being damaged and provides support for the heating wire 8 at the same time.
[0048] Reference Figure 2 and Figure 4 The second connecting member 6 is provided with a second through hole 7, which passes through the second insulating block 61 and the second grooved plate 62. In this embodiment, four second through holes 7 are provided. In other embodiments, the specific number of second through holes 7 can be determined according to actual conditions. The four second through holes 7 are arranged at equal intervals along the length direction of the second insulating block 61. One end of the heating wire 8 passes through the first through hole 5 and the second through hole 7, so that the heating wire 8 is distributed in a continuous S shape.
[0049] The heating wire 8 is distributed in a continuous S-shape through the four first through holes 5 and the four second through holes 7, so that the heating wire 8 can be more evenly distributed in the ionization chamber 2, thereby achieving a more uniform heating effect. At the same time, the current required by the heating wire 8 is reduced, the current margin of the arc discharge chamber heating power supply is increased, and the risk of damage to the arc discharge chamber heater power supply is reduced.
[0050] Reference Figure 2 and Figure 3 One end of the heating wire 8 is electrically connected to the positive electrode of the power supply, and the other end is electrically connected to the negative electrode of the power supply. The two heating wires 8 are arranged in parallel.
[0051] The parallel heating wires 8 can generally provide a more uniform temperature distribution. Because each heating wire 8 carries less current, the heat distribution may be more uniform, preventing certain areas from being too high or too low in temperature.
[0052] Reference Figure 1 and Figure 2 The heating wire 8 is a molybdenum wire, and the diameter of the heating wire 8 is 0.7 mm. The two heating wires 8 are located on both sides of the outlet end of the crucible 1.
[0053] The molybdenum wire has a high melting point, high thermal stability and good electrical conductivity, and can work stably in a high temperature environment. At the same time, the molybdenum wire has a moderate hardness and is easy to bend. When the heating wire 8 is distributed in a continuous S shape, it is easy for operators to install.
[0054] The use principle of the present application is as follows: when in use, the power supply is turned on, and the heating wires 8 on both sides of the ionization chamber 2 are heated simultaneously. A plurality of ceramic tubes 9 are sleeved on the heating wires 8, and the ceramic tubes 9 are insulating and can effectively protect the heating wires 8. The design of the plurality of ceramic tubes 9 increases the heat dissipation area, reduces the possibility of ceramic breakage, and thus keeps the heating wires 8 in a uniformly heated state, so that the temperature in the arc discharge chamber reaches above 800°C, reduces the possibility of cooling and condensation of ytterbium chloride vapor, and thus reduces the impact on the arc starting process.
[0055] At the same time, since the two heating wires 8 are arranged correspondingly and the heating wires 8 are distributed in a continuous S shape, the ionization chamber 2 is heated more evenly, the possibility of cooling and condensing of ytterbium chloride vapor in the ionization chamber 2 is reduced, thereby reducing the impact on the arc starting process.
[0056] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An arc discharge chamber heater, comprising a housing (3) connected to a crucible (1), an ionization chamber (2) disposed in the housing (3) and in communication with the crucible (1), characterized in that: Heating wires (8) are provided on both sides of the ionization chamber (2). The heating wires (8) are connected to the shell (3) and are used to heat the temperature inside the arc discharge chamber to above 800° C. A plurality of ceramic tube segments (9) are sleeved on the heating wires (8). The plurality of ceramic tube segments (9) are arranged in sequence along the length direction of the heating wires (8), and the plurality of ceramic tube segments (9) are connected end to end.
2. An arc discharge chamber heater according to claim 1, characterized in that: The length of the ceramic segment tube (9) is less than the minimum fracture threshold of the ceramic tube length.
3. An arc discharge chamber heater according to claim 1 or 2, characterized in that: A first connecting piece (4) and a second connecting piece (6) are provided on both sides of the ionization chamber (2); the first connecting piece (4) and the second connecting piece (6) are both connected to the shell (3); the heating wire (8), the first connecting piece (4) and the second connecting piece (6) located on the same side of the ionization chamber (2) form a group; the heating wire (8) is suspended; the heating wire (8) in the same group is connected to the shell (3) through the cooperation of the first connecting piece (4) and the second connecting piece (6).
4. An arc discharge chamber heater according to claim 3, characterized in that: The heating wires (8) in the same group are staggeredly connected between the first connecting member (4) and the second connecting member (6), and the heating wires (8) are distributed in a continuous S shape.
5. The arc discharge chamber heater according to claim 4, characterized in that: The first connecting member (4) is provided with a plurality of first through holes (5), the first connecting member (4) comprises a first insulating block (41) and a first grooved plate (42), the first grooved plate (42) is covered on the outside of the first insulating block (41), the first grooved plate (42) is connected to the shell (3), the first through holes (5) are penetrated through the first grooved plate (42) and the first insulating block (41), the heating wire (8) passes through the plurality of first through holes (5), so as to realize a continuous S-shaped distribution of the heating wire (8).
6. The arc discharge chamber heater according to claim 4, characterized in that: The second connecting member (6) is provided with a plurality of second through holes (7), the second connecting member (6) comprises a second insulating block (61) and a second grooved plate (62), the second grooved plate (62) is covered on the outside of the second insulating block (61), the second grooved plate (62) is connected to the shell (3), the second through holes (7) are penetrated through the second grooved plate (62) and the second insulating block (61), the heating wire (8) passes through the plurality of second through holes (7), so as to realize a continuous S-shaped distribution of the heating wire (8).
7. The arc discharge chamber heater according to claim 1, characterized in that: The heating wire (8) is a molybdenum wire.
8. The arc discharge chamber heater according to claim 1, characterized in that: The heating wires (8) on both sides of the ionization chamber (2) are arranged correspondingly.
9. The arc discharge chamber heater according to claim 1, characterized in that: One end of the heating wire (8) is electrically connected to the positive electrode of the power supply, and the other end is electrically connected to the negative electrode of the power supply. The heating wires (8) on both sides of the ionization chamber (2) are arranged in parallel.