Metal electrode flexible connection in high-temperature furnace

Abstract

The utility model relates to the technical field of high-temperature furnaces, in particular to a metal electrode flexible connection in a high-temperature furnace, which comprises a furnace body, a copper electrode, a metal electrode, a reflecting screen and a flexible connection assembly, a working cavity is arranged in the furnace body, the reflecting screen is embedded in the working cavity, one end of the metal electrode is connected to the reflecting screen, and the metal electrode and the reflecting screen are connected through a ceramic insulating part. The copper electrode is connected to the furnace body, one end of the copper electrode extends into the working cavity, and the flexible connection assembly is connected between the copper electrode and the metal electrode. A hole does not need to be reserved in the reflecting screen to achieve space insulation between the reflecting screen and the metal electrode, the possibility that heat on the inner side of the reflecting screen radiates to the position between the reflecting screen and the inner wall of the furnace body through the hole is reduced, the uniformity of the temperature in the furnace is guaranteed, and the product percent of pass is improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-temperature furnaces, and in particular to a flexible connection of metal electrodes in high-temperature furnaces. Background Art

[0002] In a higher temperature vacuum resistance furnace, high-temperature metal heating elements such as molybdenum, tungsten, and tantalum are used to heat the space inside the furnace. The heater is fixed by a metal electrode and a corresponding copper electrode. The metal electrode passes through a metal reflective screen. Within a certain temperature range, porcelain insulation can be used between the electrode and the reflective screen. If the temperature range of the porcelain is exceeded, porcelain insulation cannot be used and only space insulation can be used. That is, a larger hole is left at the point where the electrode passes through the reflective screen. When the equipment heats up, the reflective screen expands due to heat, ensuring that the reflective screen does not contact the electrode and cause a short circuit.

[0003] As the temperature rises, the thermal expansion of the reflective screen in the furnace increases. Therefore, it is necessary to leave a larger hole where the electrode passes through as spatial insulation to ensure insulation between the electrode and the reflective screen during the heating process. However, the larger the diameter of the opening, the more heat from the furnace will radiate to the outside of the reflective screen through the hole, resulting in energy waste and increased external temperature of the equipment, while affecting the temperature uniformity in the furnace and the product qualification rate. Utility Model Content

[0004] In order to reduce heat leakage in the furnace, improve the temperature uniformity in the furnace and the qualified rate of products, the present application provides a flexible connection for metal electrodes in a high-temperature furnace.

[0005] The present application provides a flexible connection for metal electrodes in a high-temperature furnace using the following technical solutions:

[0006] A flexible connection for a metal electrode in a high-temperature furnace comprises a furnace body, a copper electrode, a metal electrode, a reflective screen and a flexible connection assembly. A working chamber is provided in the furnace body, the reflective screen is embedded in the working chamber, one end of the metal electrode is connected to the reflective screen, the metal electrode and the reflective screen are connected by a ceramic insulating member, the copper electrode is connected to the furnace body, one end of the copper electrode extends into the working chamber, and the flexible connection assembly is connected between the copper electrode and the metal electrode.

[0007] By adopting the above technical solution, one end of the metal electrode is connected to the reflective screen, and the metal electrode and the reflective screen are connected by a ceramic insulating member. There is no need to reserve a hole on the reflective screen to achieve spatial insulation between the reflective screen and the metal electrode, which reduces the possibility of heat on the inside of the reflective screen being radiated through the hole to between the reflective screen and the inner wall of the furnace body, thereby ensuring the uniformity of the temperature in the furnace and improving the product qualification rate.

[0008] Preferably, the soft connection assembly includes a connector, the connector includes a U-shaped portion and a connecting portion, two connecting portions are provided, the two connecting portions are located on both sides of the U-shaped portion along the length direction of the connector, one end of the two connecting portions are respectively connected to the two ends of the U-shaped portion, and the two connecting portions are respectively connected to the copper electrode and the metal electrode.

[0009] By adopting the above technical solution, the two connecting parts are respectively connected to the copper electrode and the metal electrode to realize power transmission between the copper electrode and the metal electrode. The two connecting parts are connected by a U-shaped part, which is used to absorb the displacement generated by the high-temperature expansion of the reflective screen, thereby improving the stability of the connection between the copper electrode and the metal electrode.

[0010] Preferably, there are two connecting members, and the two connecting members are symmetrically distributed along a direction perpendicular to the axis of the copper electrode.

[0011] By adopting the above technical solution, multiple connectors are provided to improve the stability of the connection between the copper electrode and the metal electrode. The multiple connectors are used to disperse the total stress generated when the reflective screen expands at high temperature, reduce the possibility of loosening of the connection between a single connector and the copper electrode or the metal electrode, and improve the service life of the connector.

[0012] Preferably, the connecting portion is provided with a waist-shaped hole, and the waist-shaped hole is used for a bolt to pass through and then be threadedly connected with a nut to clamp the connecting piece and the copper electrode or the connecting piece and the metal electrode.

[0013] By adopting the above technical solution, a waist-shaped hole is provided in the connection part, which is used for the bolt to pass through and then be threadedly connected with the nut to clamp the connector and the copper electrode or the connector and the metal electrode. The waist-shaped hole reserves a certain adjustment space for the installation of the bolt, thereby improving the flexibility of installation and improving the installation efficiency.

[0014] Preferably, the connecting portion is provided with a plurality of waist-shaped holes, and the plurality of waist-shaped holes are distributed at intervals along the length direction of the connecting piece.

[0015] By adopting the above technical solution, multiple waist-shaped holes are set, and the multiple waist-shaped holes are spaced apart along the length direction of the connector to meet the connection needs of different spacings, thereby improving the applicability of the connector. The connection between the connector and the copper electrode or metal electrode can also be achieved through multiple bolts, thereby improving the reliability of the connection between the connector and the copper electrode or metal electrode.

[0016] Preferably, the connecting piece is a multi-layer stacked structure.

[0017] By adopting the above technical solution, the connector has a multi-layer stacked structure, which helps to increase the heat dissipation efficiency between the layers of materials and reduce the accumulation of heat between the layers of materials, so that the connector is in a stable working environment and ensures the conductive stability of the connector.

[0018] Preferably, the connecting piece is made of molybdenum.

[0019] By adopting the above technical solution, molybdenum is a metal with extremely high tensile strength and compressive strength, which enables the connector to stably withstand the stress generated by the expansion or contraction of the reflective screen, thereby increasing the service life of the connector. Molybdenum has a high melting point, which reduces the possibility of the connector melting or deformation due to excessive temperature, thereby improving the reliability of the connector.

[0020] Preferably, it also includes an electrode seat and an insulating pad. The furnace body is provided with a mounting hole, the mounting hole connects the working chamber and the outside world, the electrode seat is embedded in the mounting hole, the copper electrode is connected to the electrode seat, the insulating pad is connected to the outer periphery of the electrode seat, and the outer wall of the insulating pad is in contact with the wall of the mounting hole.

[0021] By adopting the above technical solution, the insulating pad is connected to the outer periphery of the electrode seat, and the outer wall of the insulating pad fits with the wall of the mounting hole, thereby achieving sealing between the electrode seat and the mounting hole, reducing the possibility of heat in the working chamber being radiated to the outside through the mounting hole, and improving the temperature uniformity in the furnace body. The insulating pad isolates the power transmission between the electrode seat and the furnace body, thereby improving the safety of the high-temperature furnace.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. One end of the metal electrode is connected to the reflective screen, and the metal electrode and the reflective screen are connected by a ceramic insulating member. There is no need to reserve a hole on the reflective screen to achieve spatial insulation between the reflective screen and the metal electrode. This reduces the possibility of heat from the inside of the reflective screen radiating through the hole to the space between the reflective screen and the inner wall of the furnace, ensuring the temperature uniformity in the furnace and improving the product qualification rate.

[0024] 2. The two connecting parts are connected to the copper electrode and the metal electrode respectively to realize power transmission between the copper electrode and the metal electrode. The two connecting parts are connected by a U-shaped part. The U-shaped part is used to absorb the displacement caused by the high-temperature expansion of the reflective screen, thereby improving the stability of the connection between the copper electrode and the metal electrode;

[0025] 3. The connector has a multi-layered structure, which helps to increase the heat dissipation efficiency between the layers of material and reduce the accumulation of heat between the layers of material, so that the connector is in a stable working environment and ensures the stability of the connector's conductivity. Molybdenum is a metal with extremely high tensile strength and compressive strength, which enables the connector to stably withstand the stress generated by the expansion or contraction of the reflective screen, thereby increasing the service life of the connector. Molybdenum has a high melting point, which reduces the possibility of melting or deformation of the connector due to excessive temperature, thereby improving the reliability of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a partial cross-sectional view of the flexible connection of the metal electrode in the high-temperature furnace.

[0027] Figure 2 It is a structural diagram of the connector.

[0028] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0029] Description of reference numerals:

[0030] 1. Furnace body; 11. Working chamber; 12. Mounting hole;

[0031] 2. Reflective screen;

[0032] 3. Copper electrode; 31. Terminal block; 32. Cooling channel; 33. Mounting slot; 34. First connection hole;

[0033] 4. Metal electrode; 41. Second connection hole;

[0034] 5. Soft connection assembly; 51. Connecting piece; 511. U-shaped portion; 512. Connecting portion; 5121. Waist-shaped hole;

[0035] 6. Electrode holder; 61. Through hole;

[0036] 7. Insulation pad;

[0037] 8. Water cooling assembly; 81. Connecting sleeve; 811. Water outlet; 82. Water outlet pipe; 83. Water inlet pipe; 84. Connecting seat; 841. Water inlet; 85. Water supply pipe. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the accompanying drawings.

[0039] Reference Figure 1 The embodiment of the present application discloses a flexible connection for metal electrodes in a high-temperature furnace, comprising a furnace body 1, an insulating pad 7, and an electrode holder 6. The furnace body 1 is provided with a working chamber 11, and a mounting hole 12 is provided on the wall of the working chamber 11, the mounting hole 12 being connected to the outside. One end of the electrode holder 6 extends into the working chamber 11 after passing through the mounting hole 12, and the axis of the electrode holder 6 coincides with the axis of the mounting hole 12. The insulating pad 7 is coaxially connected to the outer periphery of the electrode holder 6, and the outer wall of the insulating pad 7 is in contact with the wall of the mounting hole 12.

[0040] A flexible metal electrode connection for a high-temperature furnace also includes a copper electrode 3 and a water-cooling assembly 8. The electrode holder 6 is coaxially provided with a through-hole 61, which extends through the electrode holder 6 along its axis. The copper electrode 3 is connected to the electrode holder 6, with one end of the copper electrode 3 extending into the working chamber 11 after passing through the through-hole 61. The outer wall of the copper electrode 3 is in contact with the wall of the through-hole 61. A terminal block 31 is fixedly connected to the outer periphery of the copper electrode 3. The terminal block 31 is located on the side of the terminal holder away from the working chamber 11 and is used to connect to an external transformer. The water-cooling assembly 8 includes a connecting sleeve 81, a water outlet pipe 82, a water inlet pipe 83, a connecting seat 84, and a water supply pipe 85. One end of the connecting sleeve 81 is coaxially fixedly connected to the end of the copper electrode 3 away from the working chamber 11. The connecting seat 84 is coaxially fixedly connected to the other end of the connecting sleeve 81. The connecting seat 84 is coaxially provided with a water inlet 841, which extends through the connecting seat 84 along its axis. One end of the water inlet pipe 83 is fixedly connected to the end of the connecting seat 84 away from the connecting sleeve 81, and the water inlet pipe 83 is connected to the water inlet 841. One end of the water supply pipe 85 is coaxially fixedly connected to the end of the connecting seat 84 near the connecting sleeve 81, and the water supply pipe 85 is connected to the water inlet 841. The end of the copper electrode 3 near the connecting sleeve 81 is coaxially provided with a cooling channel 32. The other end of the water supply pipe 85 is coaxially embedded in the cooling channel 32, and a gap exists between the outer wall of the water supply pipe 85 and the inner wall of the cooling channel 32. A water outlet 811 is provided on the inner wall of the connecting sleeve 81 , and the water outlet 811 is connected to the outside. One end of the water outlet pipe 82 is fixedly connected to the outer wall of the connecting sleeve 81 , and the water outlet pipe 82 is connected to the water outlet 811 .

[0041] A flexible metal electrode connection in a high-temperature furnace also includes a reflective screen 2 and a metal electrode 4. The reflective screen 2 is embedded in a working chamber 11, and the metal electrode 4 is fixedly connected to a side of the reflective screen 2 close to the copper electrode 3. The metal electrode 4 and the reflective screen 2 are connected by a ceramic insulating member.

[0042] Reference Figure 1 and Figure 2 A flexible connection for metal electrodes in a high-temperature furnace also includes a flexible connection assembly 5. The flexible connection assembly 5 includes a connector 51, the length direction of the connector 51 being parallel to the axis direction of the copper electrode 3, and the two ends of the connector 51 along the length direction of the connector 51 being connected to the copper electrode 3 and the metal electrode 4 respectively. There are two connectors 51, and the two connectors 51 are symmetrically distributed along a direction perpendicular to the axis of the copper electrode 3. The connector 51 is a multi-layer stacked structure. In this embodiment, the connector 51 has five layers and is made of molybdenum.

[0043] Reference Figure 2 and Figure 3The connector 51 includes a U-shaped portion 511 and a connecting portion 512. There are two connecting portions 512. The two connecting portions 512 are located on both sides of the U-shaped portion 511 along the length direction of the connector 51. The two ends of the U-shaped portion 511 are fixedly connected to one end of the two connecting portions 512 respectively. The connection between the U-shaped portion 511 and the connecting portion 512 is an arc transition. The U-shaped portion 511 is located on the side of the connecting portion 512 away from the copper electrode 3. The outer periphery of the end of the copper electrode 3 close to the metal electrode 4 is provided with a mounting groove 33. The number of mounting grooves 33 is the same as the number of connectors 51 and corresponds one to one. Any connecting portion 512 is embedded in the mounting groove 33. The surface of the side of the connecting portion 512 close to the other connector 51 is in contact with the bottom of the mounting groove 33. The end of the connecting portion 512 away from the U-shaped portion 511 abuts against the wall of the mounting groove 33. The other connecting portion 512 is in contact with the side wall of the metal electrode 4. In this embodiment, the distance between the bottoms of the two mounting grooves 33 is greater than the distance between the two side surfaces of the metal electrode 4 along the thickness direction of the connecting portion 512 .

[0044] The connecting portion 512 is provided with a waist-shaped hole 5121, which passes through the connecting portion 512 along the thickness direction of the connecting portion 512. There are a plurality of waist-shaped holes 5121, and the plurality of waist-shaped holes 5121 are spaced apart along the length direction of the connecting piece 51. In this embodiment, there are two waist-shaped holes 5121. The bottom of the mounting groove 33 is provided with a first connecting hole 34, and the number of the first connecting holes 34 is the same as the number of the waist-shaped holes 5121 of the connecting portion 512 connected to the copper electrode 3 and corresponds one to one. The bolt passes through the waist-shaped hole 5121, the first connecting hole 34 and the waist-shaped hole 5121 in sequence and is threadedly connected with the nut to clamp the connecting piece 51 and the copper electrode 3. The side wall of the metal electrode 4 along the thickness direction of the connecting portion 512 is provided with a second connecting hole 41, and the number of the second connecting holes 41 is the same as the number of the waist-shaped holes 5121 of the connecting portion 512 connected to the metal electrode 4 and corresponds one to one. The bolt passes through the waist-shaped hole 5121 , the second connecting hole 41 and the waist-shaped hole 5121 in sequence and is then threadedly connected with the nut to clamp the connecting piece 51 and the metal electrode 4 .

[0045] The implementation principle of a flexible connection of a metal electrode in a high-temperature furnace in an embodiment of the present application is as follows: an insulating pad 7 is sleeved on the outer periphery of the electrode holder 6, the insulating pad 7 and the electrode holder 6 are embedded in the mounting hole 12, the electrode holder 6 is fixedly connected to the furnace body 1, the copper electrode 3 is coaxially passed through the through hole 61, so that one end of the copper electrode 3 extends into the working chamber 11, and the metal electrode 4 is fixedly connected to the reflective screen 2 through a ceramic insulating member, and the two ends of the two connecting parts 51 are respectively attached to the bottom of the mounting groove 33 and the two sides of the metal electrode 4, so that the waist-shaped hole 5121 is opposite to the first connecting hole 34 and the second connecting hole 41, and a bolt is passed through the waist-shaped hole 5121, the first connecting hole 34 and the waist-shaped hole 5121 in sequence to be threadedly connected to a nut, or through the waist-shaped hole 5121, the second connecting hole 41 and the waist-shaped hole 5121 in sequence to be threadedly connected to a nut, so as to realize that the bolt and the nut clamp the connecting part 51 and the copper electrode 3 or the metal electrode 4, and realize the connection between the copper electrode 3 and the metal electrode 4.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flexible connection for metal electrodes in a high-temperature furnace, characterized by: The invention comprises a furnace body (1), a copper electrode (3), a metal electrode (4), a reflective screen (2) and a flexible connection assembly (5); a working chamber (11) is provided in the furnace body (1); the reflective screen (2) is embedded in the working chamber (11); one end of the metal electrode (4) is connected to the reflective screen (2); the metal electrode (4) and the reflective screen (2) are connected by a ceramic insulating member; the copper electrode (3) is connected to the furnace body (1); one end of the copper electrode (3) extends into the working chamber (11); and the flexible connection assembly (5) is connected between the copper electrode (3) and the metal electrode (4).

2. The flexible metal electrode connection for a high-temperature furnace according to claim 1, characterized in that: The soft connection assembly (5) comprises a connecting piece (51); the connecting piece (51) comprises a U-shaped portion (511) and a connecting portion (512); two connecting portions (512) are provided; the two connecting portions (512) are located on both sides of the U-shaped portion (511) along the length direction of the connecting piece (51); one end of the two connecting portions (512) is respectively connected to the two ends of the U-shaped portion (511); the two connecting portions (512) are respectively connected to the copper electrode (3) and the metal electrode (4).

3. The flexible metal electrode connection for a high-temperature furnace according to claim 2, characterized in that: Two connecting pieces (51) are provided; the two connecting pieces (51) are symmetrically distributed along a direction perpendicular to the axis of the copper electrode (3).

4. The flexible metal electrode connection for a high-temperature furnace according to claim 3, characterized in that: The connecting portion (512) is provided with a waist-shaped hole (5121); the waist-shaped hole (5121) is used for a bolt to pass through and then be threadedly connected with a nut to clamp the connecting piece (51) and the copper electrode (3) or the connecting piece (51) and the metal electrode (4).

5. The flexible metal electrode connection for a high-temperature furnace according to claim 4, characterized in that: The connecting portion (512) is provided with a plurality of waist-shaped holes (5121); the plurality of waist-shaped holes (5121) are distributed at intervals along the length direction of the connecting piece (51).

6. The flexible metal electrode connection for a high-temperature furnace according to claim 2, characterized in that: The connecting piece (51) is a multi-layer superimposed structure.

7. The flexible metal electrode connection for a high-temperature furnace according to claim 2, characterized in that: The connecting piece (51) is made of molybdenum.

8. The flexible metal electrode connection for a high-temperature furnace according to claim 1, characterized in that: It also includes an electrode seat (6) and an insulating pad (7); the furnace body (1) is provided with a mounting hole (12); the mounting hole (12) communicates with the working chamber (11) and the outside; the electrode seat (6) is embedded in the mounting hole (12); the copper electrode (3) is connected to the electrode seat (6); the insulating pad (7) is connected to the outer periphery of the electrode seat (6); and the outer wall of the insulating pad (7) is in contact with the hole wall of the mounting hole (12).

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