High-temperature vacuum furnace graphite electrode fast connection structure

Abstract

The present application relates to the technical field of vacuum furnace electrode quick connection, and particularly relates to a high-temperature vacuum furnace graphite electrode quick connection structure, which comprises a copper bar, a furnace body electrode seat, a copper end connecting piece, a graphite end connecting piece and a graphite lock nut. The present application adopts a set of detachable copper end connecting piece and graphite end connecting piece to connect the water-cooled copper electrode and the graphite special-shaped electrode respectively. The planes where the conductive end A of the copper end connecting piece and the conductive end B of the graphite end connecting piece are located are precisely processed to ensure sufficient adhesion and meet the conductive requirement. When the special-shaped electrode in the vacuum furnace needs to be replaced due to loss, the replacement operation can be completed by single-end quick disassembly in the vacuum furnace.

Description

Technical Field

[0001] This invention relates to the field of quick-connect technology for vacuum furnace electrodes, and specifically to a quick-connect structure for graphite electrodes in a high-temperature vacuum furnace. Background Technology

[0002] Traditional high-temperature vacuum furnaces can reach temperatures of 2000℃, and the graphite shaped electrodes are directly connected to the water-cooled copper electrodes on the furnace body via threads. After a period of use, the graphite shaped electrodes will experience wear or malfunction, requiring disassembly and replacement. However, due to the special shape of the graphite shaped electrodes, they cannot be rotated. It is necessary to disassemble the flange and copper busbar of the external water-cooled electrode before rotation, requiring simultaneous operation inside and outside the vacuum furnace, which is very difficult and labor-intensive. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a quick-connect structure for graphite electrodes in a high-temperature vacuum furnace.

[0004] The specific technical solution is as follows:

[0005] A quick-connect structure for graphite electrodes in a high-temperature vacuum furnace is disclosed, used to connect a water-cooled copper electrode in the atmosphere to a graphite shaped electrode inside the vacuum furnace and conduct current. The quick-connect structure includes a copper busbar, a furnace body electrode base, a copper end connector, a graphite end connector, and a graphite lock nut. The copper busbar communicates internally with the graphite shaped electrode. The furnace body electrode base is installed on the outside of the insulation layer of the vacuum furnace. One end of the water-cooled copper electrode is fixed to the furnace body electrode base by a fixing bolt, and the copper busbar is connected to an external power source. One end of the copper end connector is a closed conductive end A, and the other end is a threaded end A. The threaded end A has an internal threaded hole A, and the conductive end A has a connection hole A. The other end of the water-cooled copper electrode is threaded to the internal threaded hole A. One end of the graphite end connector is a closed conductive end B with a connection hole B, and the other end has an internal threaded hole B. The graphite shaped electrode has threads, and the graphite shaped electrode is threaded to the internal threaded hole B. After the connection hole B is aligned with the connection hole A, it is locked by a CFC bolt and a CFC nut.

[0006] Before the graphite shaped electrode is threadedly connected to the internal threaded hole B, the graphite shaped electrode is first threadedly connected to the graphite lock nut.

[0007] Air holes are formed on the conductive end A of the copper end connector and the conductive end B of the graphite end connector.

[0008] Mounting holes are provided on the furnace body electrode holder and on the connecting structure at one end of the water-cooled copper electrode. After the mounting holes on the furnace body electrode holder and the connecting structure are aligned, they are locked together by fixing bolts and nuts.

[0009] The planes containing the conductive end A of the copper end connector and the conductive end B of the graphite end connector are precisely machined to ensure sufficient fit and meet conductivity requirements.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects:

[0011] This invention employs a set of detachable copper-end connectors and graphite-end connectors to connect the water-cooled copper electrode and the graphite shaped electrode, respectively. The conductive ends A and B of the copper-end connectors are precisely machined to ensure a close fit and meet conductivity requirements. When the shaped electrode inside the vacuum furnace needs replacement due to wear, it can be quickly disassembled for replacement.

[0012] When it is necessary to disassemble and replace the graphite shaped electrode, this invention does not require modification of the copper busbar at the atmospheric end and the water-cooled copper electrode. It can be operated at one end in the vacuum furnace. The structure is reliable and the operation is convenient. It has been successfully applied to a 2000℃ high-temperature vacuum furnace. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the quick-connect structure of the present invention;

[0014] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0015] Figure 3 for Figure 1 Enlarged view of a portion of point B in the middle;

[0016] Figure 4 This is a schematic diagram of the structure of the copper end connector of the present invention;

[0017] Figure 5 This is a schematic diagram of the graphite end connector of the present invention;

[0018] In the diagram: 1. Copper busbar; 2. Water-cooled copper electrode; 3. Fixing bolt; 4. Furnace body electrode holder; 5. Copper end connector; 51. Conductive end A; 52. Threaded end A; 53. Connecting hole A; 54. Internal threaded hole A; 6. CFC bolt; 7. CFC nut; 8. Graphite end connector; 81. Conductive end B; 82. Connecting hole B; 83. Internal threaded hole B; 9. Graphite lock nut; 10. Graphite shaped electrode; 11. Insulation layer; 12. Pore. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited by the drawings.

[0020] Figure 1 This is a schematic diagram of the quick-connect structure of the present invention. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 3 for Figure 1 A magnified view of a portion of point B in the middle. Figure 4This is a schematic diagram of the structure of the copper end connector of the present invention. Figure 5 The figure shows a schematic diagram of the graphite end connector of the present invention: The quick-connect structure of the graphite electrode in the high-temperature vacuum furnace of the present invention is used to connect the water-cooled copper electrode 2 in the atmosphere and the graphite shaped electrode 10 in the vacuum furnace and conduct current. The quick-connect structure includes a copper busbar 1, a furnace body electrode seat 4, a copper end connector 5, a graphite end connector 8, and a graphite lock nut 9. The copper busbar 1 is internally connected to the graphite shaped electrode 10. The furnace body electrode seat 4 is installed on the outside of the insulation layer 11 of the vacuum furnace. One end of the water-cooled copper electrode 2 is fixed to the furnace body electrode seat 4 by a fixing bolt 3. The furnace body electrode seat 4 has an installation hole. The connection structure at one end of the water-cooled copper electrode 2 has an installation hole. After the installation holes on the furnace body electrode seat 4 and the connection structure are aligned, they are locked by fixing bolts 3 and nuts. The copper busbar 1 is connected to an external power source; one end of the copper end connector 5 is a closed conductive end A51, and the other end is a threaded end A52. The threaded end A52 has an internal threaded hole A54, and the conductive end A51 has a connection hole A53; the other end of the water-cooled copper electrode 2 is threadedly connected to the internal threaded hole A54; one end of the graphite end connector 8 is a closed conductive end B81 with a connection hole B82, and the other end has an internal threaded hole B83. The graphite shaped electrode 10 has threads. After the graphite lock nut 9 is threadedly connected to the graphite shaped electrode 10, the graphite shaped electrode 10 is threadedly connected to the internal threaded hole B83. After the connection hole B82 is aligned with the connection hole A53, it is locked by CFC bolt 6 and CFC nut 7. The conductive end A51 of the copper end connector 5 and the conductive end B81 of the graphite end connector 8 have vent holes 12 for venting. The conductive ends A51 of the copper end connector and B81 of the graphite end connector are precisely machined to ensure a good fit and meet conductivity requirements.

[0021] When it is necessary to disassemble and replace the graphite shaped electrode 10, there is no need to modify the copper busbar 1 at the atmospheric end and the water-cooled copper electrode 2. The disassembly and replacement operation can be completed inside the vacuum furnace. The process is as follows: First, release the locking connection of CFC bolt 6 and CFC nut 7. Then, unscrew the graphite end connector 8 and graphite lock nut 9 from the graphite shaped electrode 10. At this time, the graphite shaped electrode 10 can be pushed out and removed from the insulation layer 11 into the vacuum furnace. After replacing the new graphite shaped electrode 10, reconnect the graphite lock nut 9 to the graphite shaped electrode 10 by thread. Then, thread the graphite shaped electrode 10 to the internal threaded hole B83. After aligning the connection hole B82 with the connection hole A53, lock it with CFC bolt 6 and CFC nut 7 to complete the quick connection.

Claims

1. A quick-connect structure for graphite electrodes in a high-temperature vacuum furnace, characterized in that: The quick-connect structure, used to connect the water-cooled copper electrode (2) in the atmosphere and the graphite shaped electrode (10) in the vacuum furnace and conduct current, includes a copper busbar (1), a furnace body electrode seat (4), a copper end connector (5), a graphite end connector (8), and a graphite lock nut (9). The copper busbar (1) is internally connected to the graphite shaped electrode (10), and the graphite lock nut (9) is connected to the graphite shaped electrode (10). The furnace body electrode seat (4) is installed on the outside of the insulation layer (11) of the vacuum furnace. One end of the water-cooled copper electrode (2) is fixed to the furnace body electrode seat (4) by a fixing bolt (3), and the copper busbar (1) is connected to an external power source. One end of the copper end connector (5) is a closed conductive end A. (51), the other end is a threaded end A (52), the threaded end A (52) has an internal threaded hole A (54), and the conductive end A (51) has a connecting hole A (53); the other end of the water-cooled copper electrode (2) is threadedly connected to the internal threaded hole A (54); one end of the graphite end connector (8) is a closed conductive end B (81) and has a connecting hole B (82), and the other end has an internal threaded hole B (83). The graphite shaped electrode (10) has threads, and the graphite shaped electrode (10) is threadedly connected to the internal threaded hole B (83). After the connecting hole B (82) and the connecting hole A (53) are aligned, they are locked by CFC bolts (6) and CFC nuts (7).

2. The quick-connect structure for graphite electrodes in a high-temperature vacuum furnace according to claim 1, characterized in that: Before the graphite shaped electrode (10) is threaded into the internal threaded hole B (83), the graphite shaped electrode (10) is first threaded into the graphite lock nut (9).

3. The quick-connect structure for graphite electrodes in a high-temperature vacuum furnace according to claim 1, characterized in that: Vent holes (12) are provided on the conductive end A (51) of the copper end connector (5) and the conductive end B (81) of the graphite end connector (8).

4. The quick-connect structure for graphite electrodes in a high-temperature vacuum furnace according to claim 1, characterized in that: The furnace body electrode holder (4) has an installation hole, and the connection structure at one end of the water-cooled copper electrode (2) has an installation hole. After the installation holes on the furnace body electrode holder (4) and the connection structure are aligned, they are locked by fixing bolts (3) and nuts.

5. The quick-connect structure for graphite electrodes in a high-temperature vacuum furnace according to claim 1, characterized in that: The conductive end A (51) of the copper end connector (5) and the conductive end B (81) of the graphite end connector (8) are precisely machined to ensure fit and meet conductivity requirements.

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