Electrode fixing structure of vacuum furnace

Abstract

The utility model provides an electrode fixing structure of a vacuum furnace. The electrode fixing structure comprises a main body mechanism and a limiting mechanism, the main body mechanism comprises a ceramic sleeve and a graphite electrode, the graphite electrode is installed in the ceramic sleeve, clamping grooves are symmetrically formed in the outer side of the ceramic sleeve, the outer side of the ceramic sleeve is symmetrically sleeved with hoop rings, clamping blocks are integrally formed on one sides of the hoop rings, and the clamping blocks are clamped with the clamping grooves; the limiting mechanism comprises a sealing cover and a fixing ring, and the sealing cover is installed at the bottom of the ceramic sleeve; the ceramic sleeve is arranged to be matched with the metal corrugated pipe and the connecting flange to be connected with the furnace body, the electrode is arranged in the ceramic sleeve, insulation protection is carried out on the electrode, meanwhile, the sealing cover is matched with the fixing ring, the hoop ring and other components to complete packaging of the electrode, stability of the electrode after installation is guaranteed, the electrode and the insulating sleeve are connected in a modularized mode, and cost is reduced. Damaged parts can be conveniently and independently disassembled and replaced, so that the overall maintenance cost of the electrode is reduced.

Description

Technical Field

[0001] This utility model relates to a fixing structure, and more particularly to an electrode fixing structure for a vacuum furnace, belonging to the field of vacuum furnace electrode technology. Background Technology

[0002] A vacuum furnace is a furnace chamber that uses a vacuum system (composed of a vacuum pump, vacuum measuring device, vacuum valve and other components) to remove some of the material from the furnace chamber, so that the pressure inside the furnace chamber is less than one standard atmosphere, thus achieving a vacuum state. The electrodes of the vacuum furnace are connected and fixed to the inner wall of the furnace by bolts passing through the fixing holes on the fixing plate.

[0003] Chinese patent application (CN202322386652.0) discloses a vacuum furnace electrode connection structure. This application uses a transition connection structure composed of a telescopic column, a spring, a movable plate, a limiting rod, and a limiting hole to facilitate electrode maintenance. However, existing vacuum furnace electrodes are often equipped with insulating kits on their outer side to ensure insulation performance. When maintaining the electrode, the insulating kits are removed together, making it inconvenient to remove the electrode separately for maintenance. Furthermore, the connection structure between the electrode and the furnace body is fixed, making it difficult to replace the connection parts individually when they are damaged, resulting in high electrode maintenance costs.

[0004] To solve the above technical problems, an electrode fixing structure for a vacuum furnace is proposed. Utility Model Content

[0005] In view of this, the present invention provides an electrode fixing structure for a vacuum furnace to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this utility model is achieved as follows: an electrode fixing structure for a vacuum furnace, comprising a main body mechanism and a limiting mechanism;

[0007] The main structure includes a ceramic sleeve and a graphite electrode. The graphite electrode is installed inside the ceramic sleeve. The outer side of the ceramic sleeve is symmetrically provided with slots. The outer side of the ceramic sleeve is symmetrically provided with a hoop. One side of the hoop is integrally formed with a locking block. The locking block engages with the slot.

[0008] The limiting mechanism includes a cap and a fixing ring. The cap is installed at the bottom of the ceramic sleeve. Fixing rods are fixedly connected at equal intervals between the cap and the fixing ring. A movable ring is slidably fitted on one side of the fixing rod. A second spring is fitted on one side of the fixing rod. The two ends of the second spring are fixedly connected to the fixing ring and the movable ring, respectively. Grooves are symmetrically opened inside the hoop, and the fixing rod engages with the hoop through the grooves.

[0009] More preferably, both sides of the two hoop rings are threaded with fixing bolts, and one end of each fixing bolt is fitted with a limit nut.

[0010] More preferably, a high-temperature epoxy resin sleeve is provided between the ceramic sleeve and the graphite electrode, and the high-temperature epoxy resin sleeve is fixedly connected to the ceramic sleeve.

[0011] More preferably, the inner top of the ceramic sleeve is provided with a metal bellows, one end of the metal bellows is fixedly connected to a connecting flange, and one end of the metal bellows is fixedly connected to a limiting ring, the limiting ring is fixedly connected to the ceramic sleeve, and the limiting ring is engaged with the graphite electrode.

[0012] More preferably, a gasket is fixedly connected to one side of the connecting flange.

[0013] More preferably, a first spring is fixedly connected to one side of the cover, and a pressure ring is fixedly connected to one end of the first spring.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] This invention connects the electrode to the furnace body via a ceramic sleeve, a metal corrugated pipe, and a connecting flange. The electrode is then embedded within the ceramic sleeve for insulation and protection. A cap, along with a fixing ring and a clamping ring, encapsulates the electrode, ensuring its stability after installation. The modular connection between the electrode and the insulating sleeve facilitates the independent removal and replacement of damaged components, thereby reducing the overall maintenance cost of the electrode.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the ceramic sleeve in this utility model;

[0020] Figure 3 This is a cross-sectional view of the cap in this utility model;

[0021] Figure 4 This is a structural diagram of the hoop ring in this utility model.

[0022] Reference numerals: 10. Main body; 11. Ceramic sleeve; 12. Graphite electrode; 13. Metal bellows; 14. Limiting ring; 15. High-temperature epoxy resin sleeve; 16. Connecting flange; 17. Gasket; 18. Slot; 20. Limiting mechanism; 21. Cover; 22. First spring; 23. Pressure ring; 24. Fixing rod; 25. Fixing ring; 26. Movable ring; 27. Second spring; 28. Hoop ring; 29. ​​Locking block; 31. Groove; 32. Fixing bolt; 33. Limiting nut. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] like Figure 1-4 As shown, this embodiment of the utility model provides an electrode fixing structure for a vacuum furnace, which consists of a main body mechanism 10 and a limiting mechanism 20.

[0026] The main body 10 includes a ceramic sleeve 11 and a graphite electrode 12. The graphite electrode 12 is installed inside the ceramic sleeve 11. The outer side of the ceramic sleeve 11 is symmetrically provided with slots 18 and symmetrically provided with clamps 28. Both sides of the clamps 28 are threaded with fixing bolts 32. One end of the fixing bolts 32 is fitted with a limit nut 33. One side of the clamps 28 is integrally formed with a locking block 29, which engages with the slots 18.

[0027] In one embodiment, the ceramic bushing 11 uses alumina ceramic or boron nitride ceramic, which has both excellent insulation and high temperature resistance.

[0028] In one embodiment, in order to isolate the graphite electrode 12 from the metal furnace body, a high-temperature epoxy resin sleeve 15 is provided between the ceramic sleeve 11 and the graphite electrode 12, and the high-temperature epoxy resin sleeve 15 is fixedly connected to the ceramic sleeve 11.

[0029] In one embodiment, in order to reduce the impact of axial thermal expansion on sealing performance, a metal bellows 13 is provided on the inner top of the ceramic sleeve 11. A connecting flange 16 is fixedly connected to one end of the metal bellows 13. The connecting flange 16 facilitates the connection and fixation of the graphite electrode 12 to the furnace body. A gasket 17 is fixedly connected to one side of the connecting flange 16. A limiting ring 14 is fixedly connected to one end of the metal bellows 13. The limiting ring 14 is fixedly connected to the ceramic sleeve 11 and engages with the graphite electrode 12.

[0030] The limiting mechanism 20 includes a cover 21 and a fixing ring 25. The cover 21 is installed at the bottom of the ceramic sleeve 11. A fixing rod 24 is fixedly connected between the cover 21 and the fixing ring 25 at equal intervals. A movable ring 26 is slidably fitted on one side of the fixing rod 24. A second spring 27 is fitted on one side of the fixing rod 24. The two ends of the second spring 27 are fixedly connected to the fixing ring 25 and the movable ring 26 respectively. The inside of the hoop 28 is symmetrically provided with grooves 31. The fixing rod 24 is engaged with the hoop 28 through the grooves 31.

[0031] In one embodiment, in order to reduce the stress on the graphite electrode 12, a first spring 22 is fixedly connected to one side of the cover 21, and a pressure ring 23 is fixedly connected to one end of the first spring 22.

[0032] In operation, the graphite electrode 12 is inserted into the ceramic sleeve 11 and encased in a high-temperature epoxy resin sleeve 15. Simultaneously, one end of the graphite electrode 12 engages with the limiting ring 14. The cap 21 is then installed on one end of the ceramic sleeve 11, limiting the position of the graphite electrode 12. A first spring 22 on one side of the cap 21 pushes a pressure ring 23 to adhere to the graphite electrode 12. After the cap 21 is installed, both the fixed ring 25 and the movable ring 26 on one side of the cap 21 are fitted onto the outside of the ceramic sleeve 11. Moving the movable ring 26 compresses the second spring 27, causing the clamping ring 28 to engage with the clamping block 29. The ceramic sleeve 11 is connected, and the two clamps 28 are assembled into a whole and fixed by the fixing bolts 32 and the limit nut 33. When the clamps 28 are installed, the fixing rod 24 is located in the groove 31. The second spring 27 pushes the movable ring 26 to contact the clamps 28, thereby fixing the cover 21. The connecting flange 16 is connected to the furnace body to complete the installation and fixing of the graphite electrode 12. During maintenance, the clamps 28 are removed, and the cover 21 can be removed to remove the graphite electrode 12 separately. Therefore, when removing the graphite electrode 12 for maintenance, it is not necessary to reconnect the connecting flange 16 to the furnace body.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An electrode fixing structure for a vacuum furnace, characterized in that: It includes the main body (10) and the limiting mechanism (20); The main body (10) includes a ceramic sleeve (11) and a graphite electrode (12). The graphite electrode (12) is installed inside the ceramic sleeve (11). The ceramic sleeve (11) has symmetrical slots (18) on its outer side. The ceramic sleeve (11) has symmetrical rings (28) on its outer side. One side of the rings (28) has a locking block (29) integrally formed. The locking block (29) engages with the slots (18). The limiting mechanism (20) includes a cover (21) and a fixing ring (25). The cover (21) is installed at the bottom of the ceramic sleeve (11). A fixing rod (24) is fixedly connected between the cover (21) and the fixing ring (25) at equal intervals. A movable ring (26) is slidably fitted on one side of the fixing rod (24). A second spring (27) is fitted on one side of the fixing rod (24). The two ends of the second spring (27) are fixedly connected to the fixing ring (25) and the movable ring (26) respectively. The hoop (28) has symmetrically opened grooves (31) inside. The fixing rod (24) is engaged with the hoop (28) through the grooves (31).

2. The electrode fixing structure of a vacuum furnace according to claim 1, characterized in that: Both sides of the two hoop rings (28) are threaded with fixing bolts (32), and one end of the fixing bolts (32) is fitted with a limit nut (33).

3. The electrode fixing structure of a vacuum furnace according to claim 1, characterized in that: A high-temperature epoxy resin sleeve (15) is provided between the ceramic sleeve (11) and the graphite electrode (12), and the high-temperature epoxy resin sleeve (15) is fixedly connected to the ceramic sleeve (11).

4. The electrode fixing structure of a vacuum furnace according to claim 1, characterized in that: The inner top of the ceramic sleeve (11) is provided with a metal bellows (13), one end of the metal bellows (13) is fixedly connected to a connecting flange (16), and one end of the metal bellows (13) is fixedly connected to a limiting ring (14). The limiting ring (14) is fixedly connected to the ceramic sleeve (11) and engages with the graphite electrode (12).

5. The electrode fixing structure of a vacuum furnace according to claim 4, characterized in that: A gasket (17) is fixedly connected to one side of the connecting flange (16).

6. The electrode fixing structure of a vacuum furnace according to claim 1, characterized in that: A first spring (22) is fixedly connected to one side of the cover (21), and a pressure ring (23) is fixedly connected to one end of the first spring (22).

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