CN102585405A - High-voltage SF6 circuit breaker nozzle and manufacturing technology - Google Patents
High-voltage SF6 circuit breaker nozzle and manufacturing technology Download PDFInfo
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- CN102585405A CN102585405A CN2012100044744A CN201210004474A CN102585405A CN 102585405 A CN102585405 A CN 102585405A CN 2012100044744 A CN2012100044744 A CN 2012100044744A CN 201210004474 A CN201210004474 A CN 201210004474A CN 102585405 A CN102585405 A CN 102585405A
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Abstract
The invention discloses a high-voltage SF6 circuit breaker nozzle and a manufacturing technology, relating to the production technology of electrical appliances. According to a raw material formula of the nozzle, LCP (Liquid Crystal Polymer) and aromatic polymer are used for modification, and the electrical performance of a nozzle material is increased by considering the balance of voltage resistance and electric arc resistance and improving color mixing; the raw materials of the nozzle comprise the following compositions: PTFE (Polytetrafluoroethylene), the LCP and the aromatic polymer; and the manufacturing technology of the nozzle comprises the following steps of: mixing additives, carrying out compression-molding or isotactic-pressing, sintering, carrying out PTFE secondary processing, checking, and obtaining a qualified nozzle product. According to the high-voltage SF6 circuit breaker nozzle and the manufacturing technology, disclosed by the invention, the difference between a dielectric constant of the LCP and a dielectric constant of the PTFE is smaller, and the relaxation polarization loss does not exist within a temperature range; the breakdown voltage strength can be increased by 20%, the electric breakdown number of times is increased by 15%, and the needs of circuit breakers in a high-voltage stage and an extra-high voltage stage can be met better; and the pressing time and the firing time are relatively shortened, the energy consumption is lowered, the productivity is increased, the product qualified rate is larger than and equal to 95%, and the voltage resistance value is increased by 20 times.
Description
Technical field
The invention belongs to field of material engineering technology, relate to a kind of electrical equipment production technology.
Background technology
China's high pressure industry starts from the fifties, and advanced foreign technology is introduced in the back, through digesting and assimilating, improving and improving and realize that in 1986 production domesticization produces 35-550KV SF6 isolating switch for many years.Develop 800KV double break mouth potting breaker in 2005, use offshore company's technology later on again, adopt co-design, joint production, domestic manufacturing mode to produce 1100KV isolating switch and GIS.
Spout is one of key part in high-voltage sf6 circuit breaker, adds the tetrafluoroethylene spout of filler exactly, and it mainly bears the ablation of high-voltage, big electric current and high-temperature electric arc, and it mainly is AL2O3, MOS2, BN that current its spout is made the starting material that add.Kind proportioning and nozzle configuration that each company adds all are not quite similar, and the deficiency that existing prescription exists has some:
(1) the filler material requires high: with filler BN is example, the one, and itself costs an arm and a leg, and the 2nd, the size of filler requirement is even, and the requirement of degree of cleaning is all very high, causes the spout product cost higher.
(2) there is the withstand voltage properties defective simultaneously; Promptly the increase breakdown voltage strength along with filler (like BN) adding proportion reduces gradually; Influence withstand voltage properties and the opening performance of spout in the isolating switch interrupting process, also influence the balance between proof voltage and the arc ablation resistance simultaneously.
(3) (the arc core instantaneous temperature can reach degree more than 3000) under the powerful arcing of spout product; Can bear very big heat; This just needs spout to have a kind of performance that absorbs and conduct heat, so as: existing BN, the similar white fillings of MOS2 are disadvantageous to absorbing heat.
(4) complete processing is complicated loaded down with trivial details, and customer requirement amount of filler difference does not wait from 1%-10%, causes our technology conversion frequent; Such as: pressure dwell time length; Many heterogeneities such as product sintering process change cause production capacity lower, product percent of pass Jin Wei ≦ 90%.
Based on first-class many factors, thereby cause to satisfy in its use the demand of the high-voltage large current trend that particularly can not satisfy present domestic electric power, can not well adapted adapt to the market development demand of low-cost and high-performance, the high production capacity of less energy-consumption.
Summary of the invention
The purpose of this invention is to provide a kind of high-voltage sf6 circuit breaker spout and manufacture craft; Expensive to solve the prior art prices of raw and semifnished materials; Cost is higher, and simultaneously along with filler (like BN), the increase breakdown voltage strength of ratio reduces gradually; Influence withstand voltage properties and the opening performance of spout in the isolating switch interrupting process, also influence the problems such as balance between proof voltage and the arc ablation resistance simultaneously.
The technical solution adopted for the present invention to solve the technical problems is that the spout composition of raw materials selects for use liquid crystalline polymers, aromatic polymer to carry out modification; Consider from proof voltage and anti-electric arc both sides balance; Improve from the mixing color aspect; Improved the electric property of vent material, its starting material set of dispense ratio is: polytetrafluoroethylene (PTFE) 80-98%, liquid crystalline polymers 2-10%, aromatic polymer 2-10%.
The process step of making spout is following:
1, additives mixed: main raw material polytetrafluoroethylene (PTFE) 80-90% is mixed with auxiliary material liquid crystalline polymer 10-20%, aromatic polymer 2-10%, stirred 10-15 minute, it is stirred.
2, compression molding or isotactic pressing: pressing process is the important step of quality product quality, guarantees the press time, and is different according to product, selects corresponding pressing operation technology for use, 40-60 minute.
3, sintering:, require operation to be generally 48-52 hour in strict accordance with the sintering of stipulating according to product size, the different reasonable computation sintering times of wall thickness with material.
4, PTFE secondary processing: naturally cooling after promptly product being come out of the stove, carry out corresponding shaping typing, machining is carried out in strictness by drawing.
5, check: obtain the spout salable product.
Adopt positively effect of the present invention be liquid crystalline polymers specific inductivity and PTFE differ less, and do not have the relaxation polarization loss in this TR.Dose aromatic polymer among the PTFE; Along with the increase breakdown voltage strength of addition improves gradually, and increase the increase of BN boride along with addition, breakdown voltage strength then reduces gradually; Under the ratio situation of identical addition; Breakdown voltage strength can improve 20%, and the electrical breakdown number of times increases by 15%, makes spout can satisfy the needs of high-voltage, extra-high pressure grade isolating switch more.Because the improvement of filler, the unity of complete processing is improved, and compacting, sintering time shorten relatively, and to cutting down the consumption of energy, improving the production capacity aspect has all had improvement, has promoted product percent of pass Yi Da ≧ 95% simultaneously, obtains good achievement.Our novel material spout improves 20 times than the proof voltage numerical value of original prescription.
Embodiment
Technical scheme of the present invention is achieved in that the spout composition of raw materials selects for use liquid crystalline polymers, aromatic polymer to carry out modification, considers that from proof voltage and anti-electric arc both sides balance the improvement from the mixing color aspect has improved the electric property of vent material.
Use the spout product to be example with 252KV high-voltage switch gear SF6 isolating switch: concrete material composition parameter and the process step of making spout:
1, additives mixed: tetrafluoroethylene 90% is an example: distinguish annex solution crystalline polymer 5%, aromatic polymer 5% proportioning, guarantee the purity according with process requirements of its material.The loose major ingredient PTFE that will weigh up earlier puts into the mixing equipment after the cleaning, weigh again auxiliary material each 5%, guarantee its loose shape, with the cleaning vessel make every effort to evenly spread to the PTFE top layer, cover the clamping apparatus lid then, anyway stirred powder 6 minutes.Storage is put merely subsequent use after ≧ 4 hours.
2, compression molding or isotactic pressing:,,, slowly release product then because of its compacting pressurize molding time of density relationship that adds materials can shorten 20% according to the different appropriateness venting of product 2-3 time with the exert pressure product of every square centimeter of 300kg.
3, sintering: according to the fusing point sintering processing of tetrafluoroethylene promptly: 300, key points such as 325 are control, the even heating mode of other low speed, and because of adding this polymkeric substance different B N, so sintering time shortens 3-5 hour than adding 10%BN, 10 ℃ of temperature reductions.Thereby play energy-saving and cost-reducing effect.
4, PTFE secondary processing: typing, satisfactory product after the check feature is provided outbound to machine shop, carries out precision sizing by drawing.
5, check: obtain the spout salable product.
Claims (2)
1. high-voltage sf6 circuit breaker spout; It is characterized in that the spout composition of raw materials selects for use liquid crystalline polymers, aromatic polymer to carry out modification; Consider from proof voltage and anti-electric arc both sides balance; The improvement from the mixing color aspect, the electric property of raising vent material, its starting material set of dispense ratio is: polytetrafluoroethylene (PTFE) 80-98%, liquid crystalline polymers 2-10%, aromatic polymer 2-10%.
2. high-voltage sf6 circuit breaker spout manufacture craft, the process step that it is characterized in that making spout is following:
(1) additives mixed: main raw material polytetrafluoroethylene (PTFE) 80-90% is mixed with auxiliary material liquid crystalline polymer 10-20%, aromatic polymer 2-10%, stirred 10-15 minute, it is stirred;
(2) compression molding or isotactic pressing: pressing process is the important step of quality product quality, guarantees the press time, and is different according to product, selects corresponding pressing operation technology for use, 40-60 minute;
(3) sintering:, require operation to be generally 48-52 hour in strict accordance with the sintering of stipulating according to product size, the different reasonable computation sintering times of wall thickness with material;
(4) PTFE secondary processing: naturally cooling after promptly product being come out of the stove, carry out corresponding shaping typing, machining is carried out in strictness by drawing;
(5) check: obtain the spout salable product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100044744A CN102585405A (en) | 2012-01-09 | 2012-01-09 | High-voltage SF6 circuit breaker nozzle and manufacturing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100044744A CN102585405A (en) | 2012-01-09 | 2012-01-09 | High-voltage SF6 circuit breaker nozzle and manufacturing technology |
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| Publication Number | Publication Date |
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| CN102585405A true CN102585405A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100044744A Pending CN102585405A (en) | 2012-01-09 | 2012-01-09 | High-voltage SF6 circuit breaker nozzle and manufacturing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104871277A (en) * | 2012-10-29 | 2015-08-26 | 欧米克朗电子仪器有限公司 | Method for diagnosing a self-blowout circuit breaker, and diagnosis apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1238355A (en) * | 1999-06-25 | 1999-12-15 | 清华大学 | Process for preparing teflon composites reinforced by liquid crystal polymers |
| CN101986405A (en) * | 2010-06-18 | 2011-03-16 | 江苏常新密封材料有限公司 | Method for manufacturing nozzle for circuit breaker |
-
2012
- 2012-01-09 CN CN2012100044744A patent/CN102585405A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1238355A (en) * | 1999-06-25 | 1999-12-15 | 清华大学 | Process for preparing teflon composites reinforced by liquid crystal polymers |
| CN101986405A (en) * | 2010-06-18 | 2011-03-16 | 江苏常新密封材料有限公司 | Method for manufacturing nozzle for circuit breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104871277A (en) * | 2012-10-29 | 2015-08-26 | 欧米克朗电子仪器有限公司 | Method for diagnosing a self-blowout circuit breaker, and diagnosis apparatus |
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Application publication date: 20120718 |