Insulated electrode with bakelite sleeve oxidation prevention function and high-temperature furnace

Abstract

The invention relates to the technical field of quartz crucible production, in particular to an insulated electrode with a bakelite sleeve oxidation prevention function and a high-temperature furnace, the insulated electrode with the bakelite sleeve oxidation prevention function is internally provided with an electrode assembly, an insulating assembly, a connecting assembly and a protection assembly, and the insulating assembly comprises an bakelite sleeve; the insulating bakelite sleeve is installed on the electrode assembly, the connecting assembly is installed on the outer side of the insulating bakelite sleeve and does not make contact with the electrode assembly, the protection assembly comprises two annular protection pads of the same structure, the electrode assembly is sleeved with the annular protection pads, and the two annular protection pads are arranged at the top end and the bottom end of the insulating bakelite sleeve respectively. The top end and the bottom end of the bakelite sleeve are tightly attached; thus, the side face of the bakelite sleeve is protected through the connecting assembly, and the top face and the bottom face of the bakelite sleeve are protected through the two annular protection pads, so that the bakelite sleeve is separated from the high-temperature environment in the high-temperature furnace, and the bakelite sleeve is prevented from being oxidized or combusted due to high temperature.

Description

Technical Field

[0001] The invention relates to the technical field of quartz crucible production, in particular to an insulating electrode and a high-temperature furnace with the function of preventing bakelite sleeves from being oxidized. Background Art

[0002] Quartz crucible is a crucible made of quartz sand. It has the advantages of high temperature resistance, corrosion resistance and easy operation. It is widely used in mineral mining, smelting, distillation, chemical industry and modern industrial production. Its production process mainly includes the following steps: 1. Raw material preparation; 2. Batching and mixing; 3. Molding; 4. Arc melting; 5. Cooling and demolding; Among them, arc melting is the process of melting quartz sand in a high-temperature furnace. Specifically, plasma is formed by electrode discharge in the high-temperature furnace, that is, arc, so as to generate high temperature to melt quartz sand; because the melting point of quartz sand is as high as 1730℃, and quartz crucible requires high-purity quartz sand, high-purity graphite is usually used as the electrode material, and copper electrode is used as Conductive material, the two are connected by a high-purity graphite joint; in the process of melting the quartz crucible, different electrode spacings are required for quartz crucibles of different sizes, so there will be a special electrode opening and closing structure in the design of the high-temperature furnace, usually one with three, or one with one three sets of electrode opening and closing structures to achieve the change of the distance between the electrodes. Since the opening and closing structure is usually a mechanical structure, it is necessary to transmit a large force when opening and closing, and the high-purity graphite joint cannot withstand the force to be transmitted, so it can only choose to bear the force on the copper electrode, which will cause the current on the copper electrode to be conducted to the external mechanism, causing safety hazards, and the existing insulating sleeve will lose its insulating effect due to the long-term use of the high-temperature furnace and the deformation, extrusion and fragmentation of the electrode outer tube.

[0003] To solve the above technical problems, the technical solution of the Chinese utility model patent announcement with patent application number CN202221629437.8 is a high-temperature furnace sealed insulated electrode, including a graphite electrode substrate, a furnace body electrode outer tube, a copper electrode substrate, and a copper busbar joint. The connection between the graphite electrode substrate and the copper electrode substrate is disposed in the furnace body electrode outer tube, and the copper electrode substrate is connected to the copper busbar joint. The characteristic is that the graphite electrode substrate and the copper electrode substrate are threaded together, an insulating bakelite sleeve 1 is matched between the copper electrode substrate and the furnace body electrode outer tube, the copper electrode substrate is connected to the copper busbar joint through a copper electrode fastening nut, the copper electrode substrate passes through the insulating bakelite sleeve 1, the sealing ring, and the insulating bakelite sleeve 2 in sequence, and the openings of the insulating bakelite sleeve 1 and the insulating bakelite sleeve 2 are respectively fitted on the sealing ring.

[0004] However, the above-mentioned prior art has the following technical problems: since the temperature in the high-temperature furnace is as high as 1000℃-1200℃, the insulating bakelite sleeve will be oxidized or even burned when working in this high-temperature environment, and the generated oxides or ashes will fall into the liquid quartz sand, resulting in a decrease in the purity of the liquid quartz sand, thereby affecting the quality of the quartz crucible. In severe cases, the quartz crucible may be directly scrapped, increasing the production cost of the enterprise. Summary of the invention

[0005] In view of this, it is necessary to provide an insulating electrode and a high-temperature furnace with the function of preventing the bakelite sleeve from being oxidized, so as to prevent the insulating bakelite sleeve from being oxidized or burned, thereby ensuring the quality of the quartz crucible and reducing the production cost.

[0006] In the first aspect, the present invention provides an insulating electrode with the function of preventing bakelite sleeve oxidation, including an electrode assembly, an insulating assembly, a connecting assembly and a protective assembly, wherein the insulating assembly includes an insulating bakelite sleeve, the insulating bakelite sleeve is installed on the electrode assembly, the connecting assembly is installed on the outside of the insulating bakelite sleeve and is not in contact with the electrode assembly, and is used to connect with the electrode opening and closing mechanism, the protective assembly includes two annular protective pads with the same structure, each annular protective pad is sleeved on the electrode assembly, the two annular protective pads are respectively arranged at the top and bottom ends of the insulating bakelite sleeve, and are respectively close to the top and bottom ends of the insulating bakelite sleeve.

[0007] Preferably, the electrode assembly includes a copper power board, a water-cooled copper electrode, a graphite joint and a graphite electrode. The top end of the water-cooled copper electrode is connected to the copper power board, and the bottom end is connected to the graphite electrode through a graphite joint to supply power to the graphite electrode.

[0008] Preferably, a water cooling pipe is provided in the water-cooled copper electrode, and a water inlet and a water outlet of the water cooling pipe are both provided at the top of the water-cooled copper electrode, so as to reduce the temperature of the water-cooled copper electrode by circulating cooling water in the water-cooled copper electrode.

[0009] Preferably, the connecting assembly includes two connecting tubes with the same structure, each connecting tube is semi-cylindrical in shape, the inner side of each connecting tube is tightly connected to the insulating bakelite sleeve and the outer side of each annular protective pad, so as to fix the annular protective pad to the outer side of the water-cooled copper electrode; a mounting platform is provided on one side of each connecting tube, and at least two mounting holes are opened on the mounting platform, so that each mounting platform is fixedly connected by threaded connection, so that the two connecting tubes are fixedly connected into a cylinder, and two connecting platforms are symmetrically provided on the other side of each connecting tube, and each connecting platform has a connecting hole for connecting to the electrode opening and closing mechanism.

[0010] Preferably, each annular protective pad is made of a material with high temperature resistance and heat insulation properties.

[0011] Preferably, each annular protective pad is made of ceramic.

[0012] In a second aspect, the present invention provides a high-temperature furnace, comprising at least two insulating electrodes with the function of preventing bakelite sleeve oxidation as described in the first aspect, an electrode opening and closing mechanism and a high-temperature furnace body, wherein the electrode opening and closing mechanism is installed in the high-temperature furnace body to adjust the distance between the insulating electrodes with the function of preventing bakelite sleeve oxidation, and each insulating electrode with the function of preventing bakelite sleeve oxidation is installed on the electrode opening and closing mechanism to generate an electric arc to produce a high temperature.

[0013] The above-mentioned insulating electrode with the function of preventing the bakelite sleeve from oxidation is provided with an electrode assembly, an insulating assembly, a connecting assembly and a protective assembly. The insulating assembly includes an insulating bakelite sleeve, which is installed on the electrode assembly. The connecting assembly is installed on the outside of the insulating bakelite sleeve and is not in contact with the electrode assembly, and is used to connect with the electrode opening and closing mechanism. The protective assembly includes two annular protective pads with the same structure, each of which is sleeved on the electrode assembly. The two annular protective pads are respectively arranged on the top and bottom ends of the insulating bakelite sleeve, and are respectively close to the top and bottom ends of the insulating bakelite sleeve; in this way, the side of the insulating bakelite sleeve is protected by the connecting assembly, and the top and bottom surfaces of the insulating bakelite sleeve are protected by the two annular protective pads, so that the bakelite sleeve is separated from the high temperature environment in the high temperature furnace to prevent the insulating bakelite sleeve from being oxidized or burned due to high temperature, thereby ensuring the quality of the quartz crucible and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an oblique bird's-eye view of the insulating electrode of the present application that has the function of preventing the bakelite sleeve from oxidation.

[0015] Figure 2 This is an oblique bird's-eye view of the insulating electrode with the function of preventing bakelite sleeve oxidation of the present application when only one connecting tube is installed.

[0016] In the figure: an insulated electrode 10 with the function of preventing the bakelite sleeve from oxidation, an electrode assembly 20, a copper connecting plate 21, a water-cooled copper electrode 22, a graphite joint 23, a graphite electrode 24, a water-cooling tube 25, an insulating assembly 30, an insulating bakelite sleeve 31, a connecting assembly 40, a connecting tube 41, a mounting platform 42, a mounting hole 43, a connecting platform 44, a connecting hole 45, a protective assembly 50, and an annular protective pad 51. DETAILED DESCRIPTION

[0017] The technical solutions and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0018] Please refer to Figure 1 and Figure 2In the first aspect, the present invention provides an insulated electrode 10 with a function of preventing bakelite sleeve oxidation, comprising an electrode assembly 20, an insulating assembly 30, a connecting assembly 40 and a protecting assembly 50, wherein the insulating assembly 30 comprises an insulating bakelite sleeve 31, the insulating bakelite sleeve 31 is mounted on the electrode assembly 20, the connecting assembly 40 is mounted on the outside of the insulating bakelite sleeve 31, and is not in contact with the electrode assembly 20, and is used to connect with the electrode opening and closing mechanism, the protecting assembly 50 is located in the connecting assembly 40, and the protecting assembly 50 comprises two annular protecting pads 51 of the same structure, each annular protecting pad 51 is sleeved on the electrode assembly 20, and the ... On the component 20, two annular protective pads 51 are respectively arranged at the top and bottom ends of the insulating bakelite sleeve 31, and are respectively close to the top and bottom ends of the insulating bakelite sleeve 31 to prevent the impurities generated by oxidation or combustion of the insulating bakelite sleeve 31 from falling into the liquid quartz sand; in this way, the side of the insulating bakelite sleeve 31 is protected by the connecting component 40, and the top and bottom surfaces of the insulating bakelite sleeve 31 are protected by the two annular protective pads 51, so that the bakelite sleeve is separated from the high temperature environment in the high temperature furnace to prevent the insulating bakelite sleeve 31 from oxidation or combustion due to high temperature, thereby ensuring the quality of the quartz crucible and reducing production costs.

[0019] Furthermore, the electrode assembly 20 includes a copper power board 21, a water-cooled copper electrode 22, a graphite joint 23 and a graphite electrode 24. The top end of the water-cooled copper electrode 22 is connected to the copper power board 21, and the bottom end is connected to the graphite electrode 24 through the graphite joint 23 to supply power to the graphite electrode 24.

[0020] Furthermore, a water cooling pipe 25 is provided in the water-cooled copper electrode 22 , and a water inlet and a water outlet of the water cooling pipe 25 are both provided at the top of the water-cooled copper electrode 22 , so as to reduce the temperature of the water-cooled copper electrode 22 by circulating cooling water in the water-cooled copper electrode 22 .

[0021] Furthermore, the connecting assembly 40 includes two connecting tubes 41 with the same structure, each connecting tube 41 is semi-cylindrical in shape, and the inner side of each connecting tube 41 is tightly connected to the outer side of the insulating bakelite sleeve 31 and each annular protective pad 51 to fix the annular protective pad 51 to the outer side of the water-cooled copper electrode 22; a mounting platform 42 is provided on one side of each connecting tube 41, and at least two mounting holes 43 are opened on the mounting platform 42, so that each mounting platform 42 is fixedly connected by threaded connection, so that the two connecting tubes 41 are fixedly connected into a cylinder, and two connecting platforms 44 are symmetrically provided on the other side of each connecting tube 41, and each connecting platform 44 is opened on a connecting hole 45 for connecting to the electrode opening and closing mechanism.

[0022] Furthermore, each annular protective pad 51 is made of a material with high temperature resistance and heat insulation properties.

[0023] Furthermore, each annular protective pad 51 is made of ceramic.

[0024] In this embodiment, the water-cooled copper electrode 22 is in contact with the annular protective pad 51, and the annular protective pad 51 is in contact with the connecting tube 41, so that the temperature of the annular protective pad 51 and the connecting tube 41 is reduced by the water-cooled copper electrode 22, thereby protecting the insulating bakelite sleeve 31 and preventing the insulating bakelite sleeve 31 from oxidation or burning.

[0025] In the second aspect, the present invention provides a high-temperature furnace, comprising at least two insulating electrodes 10 with the function of preventing bakelite sleeve oxidation as in the first aspect, an electrode opening and closing mechanism and a high-temperature furnace body. The electrode opening and closing mechanism is installed in the high-temperature furnace body to adjust the distance between the insulating electrodes 10 with the function of preventing bakelite sleeve oxidation. Each insulating electrode 10 with the function of preventing bakelite sleeve oxidation is installed on the electrode opening and closing mechanism to generate an electric arc to generate high temperature.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An insulated electrode having the function of preventing bakelite sleeve from oxidation, characterized in that: It includes an electrode assembly, an insulating assembly, a connecting assembly and a protective assembly, wherein the insulating assembly includes an insulating bakelite sleeve, the insulating bakelite sleeve is installed on the electrode assembly, the connecting assembly is installed on the outside of the insulating bakelite sleeve and is not in contact with the electrode assembly, and is used to connect with the electrode opening and closing mechanism, and the protective assembly includes two annular protective pads with the same structure, each of which is sleeved on the electrode assembly, and the two annular protective pads are respectively arranged on the top and bottom ends of the insulating bakelite sleeve, and are respectively close to the top and bottom ends of the insulating bakelite sleeve.

2. The insulating electrode with the function of preventing bakelite sleeve from oxidation as claimed in claim 1, characterized in that: The electrode assembly includes a copper power board, a water-cooled copper electrode, a graphite joint and a graphite electrode. The top end of the water-cooled copper electrode is connected to the copper power board, and the bottom end is connected to the graphite electrode through the graphite joint to supply power to the graphite electrode.

3. The insulating electrode with the function of preventing bakelite sleeve from oxidation as claimed in claim 2, characterized in that: The water-cooled copper electrode is provided with a water-cooling pipe, the water inlet and the water outlet of the water-cooling pipe are both arranged at the top of the water-cooled copper electrode, so as to reduce the temperature of the water-cooled copper electrode by circulating cooling water in the water-cooled copper electrode.

4. The insulating electrode with the function of preventing bakelite sleeve from oxidation as claimed in claim 1, characterized in that: The connecting assembly includes two connecting tubes with the same structure, each connecting tube is semi-cylindrical in shape, the inner side of each connecting tube is tightly connected to the insulating bakelite sleeve and the outer side of each annular protective pad, so as to fix the annular protective pad to the outer side of the water-cooled copper electrode; a mounting platform is provided on one side of each connecting tube, and at least two mounting holes are opened on the mounting platform, so that each mounting platform is fixedly connected by threaded connection, so that the two connecting tubes are fixedly connected into a cylinder, and two connecting platforms are symmetrically provided on the other side of each connecting tube, and each connecting platform has a connecting hole for connecting to the electrode opening and closing mechanism.

5. The insulating electrode with the function of preventing bakelite sleeve from oxidation as claimed in claim 1, characterized in that: Each annular protective pad is made of a material with high temperature resistance and heat insulation properties.

6. The insulating electrode with the function of preventing bakelite sleeve from oxidation as claimed in claim 1, characterized in that: Each annular protective pad is made of ceramic.

7. A high temperature furnace, characterized in that: It comprises at least two insulating electrodes with the function of preventing bakelite sleeve oxidation as described in any one of claims 1 to 6, an electrode opening and closing mechanism and a high-temperature furnace body, wherein the electrode opening and closing mechanism is installed in the high-temperature furnace body to adjust the distance between the insulating electrodes with the function of preventing bakelite sleeve oxidation, and each insulating electrode with the function of preventing bakelite sleeve oxidation is installed on the electrode opening and closing mechanism to generate an electric arc to produce a high temperature.

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