Flashing connection method of ceramic insulator

Abstract

The invention relates to a flash connection method of a ceramic insulator. The method comprises the following steps of: butting a joint surface of the ceramic insulator and the ceramic insulator coated with conductive colloid; the conducting rings abut against the joint parts of the ceramic insulators respectively; extra-high voltage or extra-high current is applied to the conducting ring, and the conducting colloid is forced to conduct electricity and flash to be connected with the ceramic insulators; and cutting off the power supply, and disassembling the conducting ring after the ceramic insulator is cooled to room temperature. The conducting ring is close to the joint part of the two insulators, and the temperature of the conducting colloid on the joint surface of the insulators is increased through the ultrahigh voltage or ultrahigh current of the super capacitor, so that the mass transfer effect of the insulators on the two sides is realized, the instantaneous flash connection is realized, the connection temperature can be obviously reduced, and the connection time can be obviously shortened; by adopting the method disclosed by the invention, the two ceramic insulators can be connected within second-level time, the energy consumption can be reduced by adopting the super capacitor, and the method disclosed by the invention can be widely applied to the field of oversized electric porcelain.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic material connection, and in particular to a flash connection method for a ceramic insulator. Background Art

[0002] The connection of ceramic insulators has always been a difficult problem in the connection of UHV power porcelain. Inspired by the flash burning (Flashsintering) technology, Xia et al. first proposed a new electric field induced flash joining (FJ) technology. By applying a DC electric field exceeding the threshold to the ion conductive ceramic material, the "flash" phenomenon is generated, and the ceramic material can be connected in a very short time (seconds). The use of flash connection technology can quickly connect ceramic insulators, effectively reduce the loss of ceramic insulators, and greatly improve the efficiency of ceramic insulator connection work.

[0003] However, the existing ceramic insulator connections are made by splicing them separately, which is time-consuming. The existing flash connection technology is mainly used in the electric field assisted connection of small ceramic materials, and there is little research on the field of large ceramics. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a flash connection method for ceramic insulators, which applies the flash connection technology to the "seamless" connection of ceramic insulators, and has the characteristics of simple connection process, low connection temperature, short connection time and low energy consumption.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A flash connection method for a ceramic insulator comprises the following steps: Step 1: Butt the ceramic insulator (1) and the ceramic insulator (3) coated with the conductive colloid (2) together; wherein the thickness of the conductive colloid joint surface is 0.3-1 cm, and the width of both sides of the joint surface is 1-3 cm; Step 2: Place the conductive ring close to the joint of the ceramic insulator (1) and the ceramic insulator (3); the conductive ring should be close to the joint of the ceramic insulator (1) and the ceramic insulator (3), 3-10 cm away from the joint surface; Step 3: applying an ultra-high voltage or ultra-high current to the conductive ring, forcing the conductive colloid (2) to conduct electricity and cause flash connection between the ceramic insulator (1) and the ceramic insulator (3), wherein the applied ultra-high voltage is 5-80 kV and the ultra-high current is 40-1000 A; Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before removing the conductive ring.

[0006] The conductive colloid in step 1 is composed of a resin matrix, conductive particles, inorganic fillers, dispersing additives, auxiliary agents, etc.

[0007] The resin matrix includes epoxy resin, acrylate resin and polyvinyl chloride.

[0008] The conductive particles include powders of gold, silver, copper, aluminum, zinc, iron, nickel, graphite and some conductive compounds. The inorganic filler includes silicate, kaolin, water glass and silica sol.

[0009] The conductive rings described in step 2 should be used in pairs.

[0010] The ultra-high voltage or ultra-high current applied in step 3 is provided by a supercapacitor.

[0011] The beneficial effects of the present invention are: The present invention adopts the flash connection technology to connect two ceramic insulators. By placing a conductive ring close to the joint of the two insulators, the ultra-high voltage or ultra-high current of the supercapacitor is used to force the conductive colloid on the joint surface of the insulator to heat up, so that the insulators on both sides have a mass transfer effect, thereby achieving instantaneous flash connection, which can significantly reduce the connection temperature and shorten the connection time. The method of the present invention can achieve the connection of two ceramic insulators in seconds, and the use of supercapacitors can reduce energy consumption. The present invention can be widely used in the field of ultra-large-size power porcelain. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a flow chart of the method of the present invention; Figure 2 A schematic diagram of the structure of a ceramic insulator of a flash connection method for a ceramic insulator proposed by the present invention; Figure 3 A structural schematic diagram of a flash connection method for a ceramic insulator proposed by the present invention; Figure 4 The COMSOL body potential diagram obtained in Example 1 of the present invention; Figure 5 The COMSOL body temperature diagram obtained in Example 1 of the present invention; Figure 6 The COMSOL cross-sectional surface potential and temperature diagram obtained in Example 1 of the present invention; in: Figure 2 . 1- Ceramic insulator; 2- Joint surface; 3- Ceramic insulator; Figure 3 . 1- Ceramic insulator; 2- Conductive colloid; 3- Ceramic insulator. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] like Figure 1 As shown, a flash connection method for a ceramic insulator comprises the following steps: Step 1: Figure 3 As shown, the ceramic insulator 1 is butted against the joint surface of the ceramic insulator 3 coated with the conductive colloid 2; the thickness of the conductive colloid joint surface is 0.3-1 cm, and the width of the two sides of the outer periphery of the joint surface is 1-3 cm; Step 2: Place the conductive rings close to the joints of ceramic insulators 1 and 3 respectively; the conductive rings should be close to the joints of ceramic insulators 1 and 3, 3-10 cm away from the joint surface; the conductive rings should be used in pairs; Step 3: Apply ultra-high voltage or ultra-high current to the conductive ring to force the conductive colloid 2 to conduct electricity and flash to connect the ceramic insulator 1 and the ceramic insulator 3; the applied ultra-high voltage is 5-80kv, and the ultra-high current is 40-1000A; the applied ultra-high voltage or ultra-high current is provided by the supercapacitor.

[0015] Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before removing the conductive ring.

[0016] The present invention places a conductive ring close to the joint of two insulators, and forces the conductive colloid on the joint surface of the insulators to heat up through the ultra-high voltage or ultra-high current of the supercapacitor, so that the insulators on both sides have a mass transfer effect, thereby achieving instantaneous flash connection, which can significantly reduce the connection temperature and shorten the connection time. Example

[0017] Step 1: Butt the ceramic insulator 1 and the ceramic insulator 3 coated with the conductive colloid 2 together; the thickness of the conductive colloid joint surface is 0.3 cm, and the width of both sides of the joint surface is 1 cm; Step 2: Place the conductive rings close to the joints of ceramic insulators 1 and 3 respectively; the conductive rings should be close to the joints of ceramic insulators 1 and 3, 3 cm away from the joint surface; the conductive rings should be used in pairs; Step 3: Apply an ultra-high voltage to the conductive ring, forcing the conductive colloid 2 to conduct electricity and flash to connect the ceramic insulator 1 and the ceramic insulator 3; the applied ultra-high voltage is 6000V; the applied ultra-high voltage is provided by the supercapacitor.

[0018] Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before disassembling the device.

[0019] like Figure 4 As shown in the figure, it can be seen from the COMSOL body potential diagram that the voltage at the insulator joint is the largest, which is conducive to making the current thermal effect act only at the interface, proving that it is feasible to connect ceramic insulators using flash connection.

[0020] like Figure 5 As shown in the figure, it can be seen from the body temperature cross-section diagram of COMSOL that after the voltage is applied, the connection temperature of the joint surface of the ceramic insulator can be as high as 1600K, which means that the thermal effect of the current can provide the heat required for the ceramic interface bonding, providing a method for instantaneous connection of ceramic insulators.

[0021] like Figure 6 As shown, it can be seen from the cross-sectional surface potential and temperature diagram of COMSOL that the potential and temperature distribution at the joint surface of the ceramic insulator are basically consistent, which proves that it is feasible to regulate the heat distribution by electric potential, and further proves that the flash connection method for ceramic insulators provided by the present invention is feasible. Example

[0022] Step 1: Butt the ceramic insulator 1 and the ceramic insulator 3 coated with the conductive colloid 2 together; the thickness of the conductive colloid joint surface is 0.6 cm, and the width of both sides of the joint surface is 2 cm; Step 2: Place the conductive rings close to the joints of ceramic insulators 1 and 3 respectively; the conductive rings should be close to the joints of ceramic insulators 1 and 3, 6 cm away from the joint surface; the conductive rings should be used in pairs; Step 3: Apply an ultra-high current to the conductive ring to force the conductive colloid 2 to conduct electricity and flash to connect the ceramic insulator 1 and the ceramic insulator 3; the applied ultra-high current is 500A; the applied ultra-high voltage or ultra-high current is provided by the supercapacitor.

[0023] Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before disassembling the device. Example

[0024] Step 1: Butt the ceramic insulator 1 and the ceramic insulator 3 coated with the conductive colloid 2 together; the thickness of the conductive colloid joint surface is 1 cm, and the width of both sides of the joint surface is 3 cm; Step 2: Place the conductive rings close to the joints of ceramic insulators 1 and 3 respectively; the conductive rings should be close to the joints of ceramic insulators 1 and 3, 10 cm away from the joint surface; the conductive rings should be used in pairs; Step 3: Apply an ultra-high voltage to the conductive ring, forcing the conductive colloid 2 to conduct electricity and generate flash to connect the ceramic insulator 1 and the ceramic insulator 3; the applied ultra-high voltage is 80 kV; the applied ultra-high voltage is provided by the supercapacitor.

[0025] Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before disassembling the device.

Claims

1. A flash connection method for ceramic insulators, characterized in that: The specific steps include: Step 1: Butt the ceramic insulator (1) and the ceramic insulator (3) coated with the conductive colloid (2) together; wherein the thickness of the conductive colloid joint surface is 0.3-1 cm, and the width of both sides of the joint surface is 1-3 cm; Step 2: Place the conductive ring close to the joint of the ceramic insulator (1) and the ceramic insulator (3); the conductive ring should be close to the joint of the ceramic insulator (1) and the ceramic insulator (3), 3-10 cm away from the joint surface; Step 3: applying an ultra-high voltage or ultra-high current to the conductive ring, forcing the conductive colloid (2) to conduct electricity and cause flash connection between the ceramic insulator (1) and the ceramic insulator (3), wherein the applied ultra-high voltage is 5-80 kV and the ultra-high current is 40-1000 A; Step 4: Cut off the power supply and wait for the ceramic insulator to cool to room temperature before removing the conductive ring.

2. A flash connection method for ceramic insulators according to claim 1, characterized in that: The conductive colloid in step 1 is composed of a resin matrix, conductive particles, inorganic fillers, dispersing additives, auxiliary agents, etc.

3. A flash connection method for ceramic insulators according to claim 2, characterized in that: The resin matrix includes epoxy resin, acrylate resin and polyvinyl chloride.

4. A flash connection method for ceramic insulators according to claim 2, characterized in that: The conductive particles include powders of gold, silver, copper, aluminum, zinc, iron, nickel, graphite and some conductive compounds.

5. The method for lightning connection of a ceramic insulator according to claim 1, characterized in that: The inorganic filler includes silicate, kaolin, water glass and silica sol.

6. A flash connection method for ceramic insulators according to claim 1, characterized in that: The conductive rings described in step 2 should be used in pairs.

7. A flash connection method for ceramic insulators according to claim 1, characterized in that: The ultra-high voltage or ultra-high current applied in step 3 is provided by a supercapacitor.

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