A flash connection method for a ceramic insulator

Abstract

The application discloses a flash connecting method of ceramic insulators, which comprises the following steps: abutting the joint surfaces of the ceramic insulators coated with conductive colloid; abutting the conductive rings against the joint surfaces of the ceramic insulators; applying super high voltage or super high current to the conductive rings to force the conductive colloid to conduct electricity and cause the flash connection of the ceramic insulators; cutting off the power supply; and removing the conductive rings after the ceramic insulators are cooled to room temperature. By abutting the conductive rings against the joint surfaces of the two insulators, the super high voltage or super high current of the super capacitor is used to heat the conductive colloid on the joint surfaces of the insulators, so that the mass transfer effect of the insulators on the two sides is caused, and the instant flash connection is realized. The connecting temperature is significantly reduced, and the connecting time is shortened. The two ceramic insulators can be connected in seconds by using the method, the energy consumption can be reduced by using the super capacitor, and the application can be widely applied to the field of super large size power porcelain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic material connection, in particular to a flash connection method of ceramic insulator. BACKGROUND

[0002] The connection of ceramic insulator has always been a difficult problem in the connection of extra-high voltage power porcelain. Inspired by the flash sintering technology, Xia et al. first proposed a new type of electric field induced flash connection (FJ) technology. By applying a direct current field exceeding the threshold value to ion-conducting ceramic materials, the "flash" phenomenon is generated, which can connect ceramic materials in a very short time (seconds). By using the flash connection technology, ceramic insulators can be quickly connected, which can effectively reduce the loss of ceramic insulators and greatly improve the efficiency of the connection work of ceramic insulators.

[0003] However, the existing connection of ceramic insulator is through separate splicing, which takes a long time, and the existing flash connection technology is mainly applied in the electric field assisted connection of small ceramic materials, and there is little research on large ceramic field. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a flash connection method of ceramic insulator, which applies the flash connection technology to the "seamless" connection of ceramic insulator, 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 purpose, the technical scheme adopted by the present application is:

[0006] A flash connection method of ceramic insulator, specifically comprising the following steps:

[0007] Step 1: abutting the joint surfaces of the ceramic insulator (1) and the ceramic insulator (3) coated with the conductive colloid (2); wherein the thickness of the conductive colloid joint surface is 0.3-1cm, and the width of the outer periphery of the joint surface is 1-3cm;

[0008] Step 2: abutting the joint parts of the ceramic insulator (1) and the ceramic insulator (3) with the conductive ring respectively; wherein the conductive ring should abut the joint parts of the ceramic insulator (1) and the ceramic insulator (3), and be 3-10cm away from the joint surface;

[0009] Step 3: applying an ultra-high voltage or an ultra-high current to the conductive ring to force the conductive colloid (2) to conduct electricity and flash connect the ceramic insulator (1) and the ceramic insulator (3), wherein the applied ultra-high voltage is 5-80kv, and the ultra-high current is 40-1000A;

[0010] Step 4: cut off the power, and after the ceramic insulator cools to room temperature, remove the conducting ring.

[0011] The conducting glue in step 1 is composed of resin matrix, conductive particles, inorganic fillers, dispersing additives, and auxiliary agents.

[0012] The resin matrix includes epoxy resin, acrylate resin, and polyurethane.

[0013] The conductive particles include gold, silver, copper, aluminum, zinc, iron, nickel powder, and graphite and some conductive compounds.

[0014] The inorganic fillers include silicate, kaolin, water glass, and silica sol.

[0015] The conducting ring in step 2 should be used in pairs.

[0016] The super high voltage or super high current applied in step 3 is provided by a super capacitor.

[0017] The beneficial effects of the present application are:

[0018] The present application uses flash connection technology to connect two ceramic insulators. By placing the conducting ring close to the joint of the two insulators, the super high voltage or super high current of the super capacitor is used to heat the conducting glue on the joint surface of the insulator, causing mass transfer on both sides of the insulator, thereby achieving instantaneous flash connection, significantly reducing the connection temperature and shortening the connection time. The method of the present application can connect two ceramic insulators in seconds, and the use of a super capacitor can reduce energy consumption. The present application can be widely used in the field of super large size power ceramics. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The flowchart of the method of the present application;

[0020] Figure 2 The structure diagram of the ceramic insulator of the flash connection method of the ceramic insulator proposed by the present application;

[0021] Figure 3 The structure diagram of the flash connection method of the ceramic insulator proposed by the present application;

[0022] Figure 4 The COMSOL body potential diagram obtained by example 1 of the present application;

[0023] Figure 5 The COMSOL body temperature diagram obtained by example 1 of the present application;

[0024] Figure 6 The COMSOL cross-section surface potential and temperature diagram obtained by example 1 of the present application;

[0025] in: Figure 2 1-Ceramic insulator; 2-Joint surface; 3-Ceramic insulator; Figure 3 1-Ceramic insulator; 2-Conductive colloid; 3-Ceramic insulator. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, a flashover connection method for ceramic insulators includes the following steps:

[0028] Step 1: As Figure 3 As shown, the joint surfaces of ceramic insulator 1 and ceramic insulator 3 coated with conductive colloid 2 are joined together; the thickness of the conductive colloid joint surface is 0.3-1cm, and the width of the outer sides of the joint surface is 1-3cm.

[0029] Step 2: Place the conductive rings tightly against the joint of ceramic insulator 1 and ceramic insulator 3 respectively; the conductive rings should be close to the joint of ceramic insulator 1 and ceramic insulator 3, 3-10cm away from the joint surface; conductive rings should be used in pairs;

[0030] 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 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.

[0031] Step 4: Disconnect the power supply and wait for the ceramic insulator to cool to room temperature before removing the conductive ring.

[0032] This invention achieves instantaneous flash connection by placing a conductive ring close to the joint of two insulators and using the ultra-high voltage or ultra-high current of a supercapacitor to force the conductive colloid on the joint surface of the insulators to heat up, causing mass transfer between the insulators on both sides. This significantly reduces the connection temperature and shortens the connection time. Example

[0033] Step 1: Connect the joint surfaces of ceramic insulator 1 and ceramic insulator 3 coated with conductive colloid 2; the thickness of the conductive colloid joint surface is 0.3cm, and the width of the joint surface is 1cm on both sides of the outer perimeter.

[0034] Step 2: Place the conductive rings tightly against the joint of ceramic insulator 1 and ceramic insulator 3 respectively; the conductive rings should be close to the joint of ceramic insulator 1 and ceramic insulator 3, 3cm away from the joint surface; the conductive rings should be used in pairs;

[0035] Step 3: Apply an ultra-high voltage to the conductive ring to force the conductive colloid 2 to conduct electricity and flash 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.

[0036] Step 4: Disconnect the power supply and wait for the ceramic insulator to cool to room temperature before disassembling the device.

[0037] like Figure 4 As shown in the COMSOL volume potential diagram, the voltage at the insulator joint is the highest, which is beneficial to ensure that the current heating effect only acts at the interface, proving that it is possible to use flash connection to connect ceramic insulators.

[0038] like Figure 5 As shown in the COMSOL volume temperature cross-section diagram, the connection temperature of the ceramic insulator joint surface can reach as high as 1600K after voltage is applied. This indicates that the thermal effect of current can provide the heat required for ceramic interface bonding, providing a method for instantaneous connection of ceramic insulators.

[0039] like Figure 6 As shown in the cross-sectional potential and temperature diagram of COMSOL, the potential and temperature distribution at the joint surface of the ceramic insulator are basically consistent, proving that potential regulation of heat distribution is feasible, and further proving that the flash connection method for ceramic insulators provided by this invention is feasible. Example

[0040] Step 1: Connect the joint surfaces of ceramic insulator 1 and ceramic insulator 3 coated with conductive colloid 2; the thickness of the conductive colloid joint surface is 0.6cm, and the width of the joint surface on both sides is 2cm.

[0041] Step 2: Place the conductive rings tightly against the joint of ceramic insulator 1 and ceramic insulator 3 respectively; the conductive rings should be placed tightly against the joint of ceramic insulator 1 and ceramic insulator 3, 6cm away from the joint surface; the conductive rings should be used in pairs;

[0042] Step 3: Apply an ultra-high current to the conductive ring to force the conductive colloid 2 to conduct electricity and flash over the ceramic insulator 1 and ceramic insulator 3; the applied ultra-high current is 500A; the applied ultra-high voltage or ultra-high current is provided by the supercapacitor.

[0043] Step 4: Disconnect the power supply and wait for the ceramic insulator to cool to room temperature before disassembling the device. Example

[0044] Step 1: Connect the joint surfaces of ceramic insulator 1 and ceramic insulator 3 coated with conductive colloid 2; the thickness of the conductive colloid joint surface is 1cm, and the width of the outer sides of the joint surface is 3cm.

[0045] Step 2: The conductive ring is respectively close to the joint part of the ceramic insulator 1 and the ceramic insulator 3; the conductive ring should be close to the joint part of the ceramic insulator 1 and the ceramic insulator 3, 10 cm away from the joint surface; the conductive ring should be used in pairs;

[0046] Step 3: Apply ultra-high voltage to the conductive ring to force the conductive colloid 2 to conduct electricity and flash connect the ceramic insulator 1 and the ceramic insulator 3; the applied ultra-high voltage is 80kV; the applied ultra-high voltage is provided by the super capacitor.

[0047] Step 4: Cut off the power supply, and then disassemble the device after the ceramic insulator cools to room temperature.

Claims

1. A method of flash connecting a ceramic insulator, characterized by, Specifically comprising the following steps: Step 1: ceramic insulator (1) and coated with conductive colloidal (2) ceramic insulator (3) joint surface to joint; wherein the conductive colloidal (2) joint surface thickness is 0.3-1cm, joint surface peripheral two sides wide 1-3cm; Step 2: the conductive ring is close to the ceramic insulator (1) and coated with conductive colloidal (2) ceramic insulator (3) joint part respectively; wherein the conductive ring should be close to the ceramic insulator (1) and coated with conductive colloidal (2) ceramic insulator (3) joint part, 3-10cm from the joint surface; Step 3: the conductive ring is applied to the super high voltage or super high current, forcing the conductive colloidal (2) conductive flash connection ceramic insulator (1) and coated with conductive colloidal (2) ceramic insulator (3), wherein the applied super high voltage is 5-80kv, super high current is 40-1000A; Step 4: cut off the power, after the ceramic insulator cooling to room temperature again disassembly conductive ring; The conductive colloidal (2) in step 1 is composed of resin matrix, conductive particles, inorganic fillers, dispersing additives and additives; The conductive ring in step 2 should be used in pairs.

2. A method of flash bonding a ceramic insulator according to claim 1, wherein The resin matrix includes epoxy resin or acrylate resin or polyurethane.

3. The method of claim 1, wherein the ceramic insulator is a porcelain insulator. The conductive particles include gold or silver or copper or aluminum or zinc or iron or nickel powder and graphite and conductive compounds.

4. The method of claim 1, wherein the ceramic insulator is a porcelain insulator. The inorganic fillers include silicate or kaolin or water glass or silica sol.

5. The method of claim 1, wherein the ceramic insulator is a porcelain insulator. The applied super high voltage or super high current in step 3 is provided by super capacitor.

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