CN111220641A - Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle - Google Patents
Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle Download PDFInfo
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- CN111220641A CN111220641A CN201911149984.9A CN201911149984A CN111220641A CN 111220641 A CN111220641 A CN 111220641A CN 201911149984 A CN201911149984 A CN 201911149984A CN 111220641 A CN111220641 A CN 111220641A
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- 238000002679 ablation Methods 0.000 title claims abstract description 110
- 238000001514 detection method Methods 0.000 title claims abstract description 74
- 238000011156 evaluation Methods 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 40
- 238000000465 moulding Methods 0.000 claims abstract description 20
- 239000012212 insulator Substances 0.000 claims description 25
- 230000007704 transition Effects 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 5
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- 230000008901 benefit Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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Abstract
The invention relates to an anti-ablation detection device, a detection method and an evaluation method for an arc extinguishing nozzle. The method for evaluating the ablation resistance of the arc extinguishing nozzle comprises the following steps of taking at least two arc extinguishing nozzles with different single molding parameters, carrying out the method for detecting the ablation resistance of the arc extinguishing nozzle under the same test condition, and comparing the ablation amount of each arc extinguishing nozzle to judge the influence of the single molding parameters on the ablation resistance. According to the method for evaluating the ablation resistance of the arc extinguishing nozzle, under the same test condition (the factors influencing the ablation amount such as voltage, current, ablation time and the like are not changed), at least two arc extinguishing nozzles with different single molding parameters are detected, and the influence of the single molding parameters on the ablation resistance of the arc extinguishing nozzles is judged according to the corresponding relation between the ablation amount and the single molding parameters (formula, molding process or shape), so that technical support is provided for the improvement of the subsequent arc extinguishing nozzles.
Description
Technical Field
The invention relates to an anti-ablation detection device, a detection method and an evaluation method for an arc extinguishing nozzle.
Background
The arc extinguishing nozzle is used as a core component for controlling electric arcs and creating high-speed air blowing conditions in the arc extinguishing device of the circuit breaker, and plays an extremely important role in opening and closing. It not only has excellent electrical performance, mechanical performance and chemical corrosion resistance, but also takes the arc ablation resistance into full consideration. When the circuit breaker is switched on and off, the electric arc is ignited in the nozzle, and energy exchange is carried out between the electric arc and the nozzle, so that the surface ablation and the internal decomposition of the nozzle are caused. The ablation resistance of the nozzle material directly affects the breaking capacity and the service life of the high-voltage circuit breaker.
In the prior art, after the formula, the forming process and the shape of the arc extinguishing nozzle are improved, the ablation resistance of the improved arc extinguishing nozzle cannot be detected, so that the influence of the corresponding formula, the forming process or the shape on the ablation resistance of the arc extinguishing nozzle cannot be judged, and the subsequent improvement of the arc extinguishing nozzle is inconvenient.
Disclosure of Invention
The invention aims to provide an ablation resistance detection device for an arc extinguishing nozzle, which is used for solving the problem that the improved ablation resistance of the arc extinguishing nozzle cannot be detected in the prior art, so that the influence of a corresponding formula, a forming process or a shape on the ablation resistance of the arc extinguishing nozzle cannot be judged, and the inconvenience is brought to the improvement of a subsequent arc extinguishing nozzle.
In order to achieve the purpose, the technical scheme of the anti-ablation detection device for the arc extinguishing nozzle is as follows: an ablation resistance detection device for an arc extinguishing nozzle, comprising
A housing having a hollow chamber;
the shell is provided with a wire inlet and a wire outlet;
the wire inlet and the wire outlet are respectively connected with a wiring sleeve, and the wiring sleeve and the shell are enclosed to form a sealed cavity;
the vacuum arc extinguishing chamber main body is arranged in the hollow cavity of the shell and is used for installing an arc extinguishing nozzle to be detected;
the vacuum arc extinguish chamber main body is provided with a static end and a dynamic end;
the static end and the dynamic end are respectively and electrically connected with the corresponding wiring sleeve.
The anti-ablation detection device for the arc extinguishing nozzle has the beneficial effects that: the invention simulates the structure of a vacuum circuit breaker to install an arc extinguishing spout, then loads detection current on an anti-ablation detection device through a wiring sleeve to carry out an ablation test on the arc extinguishing spout, the ablation amount of the arc extinguishing nozzle is recorded by comparing the weight before and after the detection of the arc extinguishing nozzle and the structural size, so that the ablation resistance of the arc extinguishing nozzle is judged, at least two arc extinguishing spouts with different single molding parameters are tested under the same test conditions (the factors influencing the ablation amount such as voltage, current, ablation time and the like are not changed), and then, transversely comparing the ablation amount of each arc extinguishing nozzle, and judging the influence of the single molding parameter on the ablation resistance of the arc extinguishing nozzle according to the corresponding relation between the ablation amount and the single molding parameter (formula, molding process or shape), thereby providing technical support for the improvement of the subsequent arc extinguishing nozzle.
Further, the voltage grade of the wiring sleeve is smaller than that of the arc extinguishing nozzle to be detected.
The arc extinguishing nozzle has the beneficial effects that the detection current with the voltage grade smaller than that of the arc extinguishing nozzle is introduced, so that the wiring sleeve with the lower voltage grade can be used, and the cost is reduced.
Furthermore, the wiring sleeve is respectively connected with the wire inlet and the wire outlet through a transition pipe, the size of one axial end of the transition pipe is matched with the wiring sleeve, and the size of the other axial end of the transition pipe is matched with the corresponding wire inlet or wire outlet.
The novel wire connecting sleeve has the advantages that the transition section is connected with the existing wire connecting sleeve and the corresponding wire inlet or wire outlet, and the manufacturing difficulty is low.
Furthermore, a basin-type insulator is arranged between the transition cylinder and the corresponding wire inlet and wire outlet, and two sides of the basin-type insulator form a sealed air chamber respectively; and a ventilation channel for communicating the sealed air chambers on the two sides is arranged on the basin-type insulator.
The ablation-resistant detection device has the advantages that the whole inflation requirement of the ablation-resistant detection device can be met by one-time inflation, and the operation is simple.
Furthermore, the wire inlet and the wire outlet are arranged oppositely.
The cable connector has the beneficial effects that interference between the incoming cable and the outgoing cable is avoided.
In order to achieve the purpose, the technical scheme of the anti-ablation detection method for the arc extinguishing nozzle is as follows: the ablation resistance detection method for the arc extinguishing nozzle comprises the following steps; the method comprises the following steps of firstly weighing an arc extinguishing nozzle and measuring the structural size of the arc extinguishing nozzle, secondly placing the arc extinguishing nozzle on an anti-ablation detection device for the arc extinguishing nozzle, loading detection current on the anti-ablation detection device to perform an ablation test on the arc extinguishing nozzle, thirdly taking down the arc extinguishing nozzle, wiping off ash, weighing the arc extinguishing nozzle and measuring the structural size of the arc extinguishing nozzle, and fourthly comparing the weight before and after the test of the arc extinguishing nozzle and the size of a key part to record the ablation amount of the arc extinguishing nozzle.
The invention discloses an anti-ablation detection method for an arc extinguishing nozzle, which has the beneficial effects that: the ablation resistance of the arc extinguishing nozzle is judged by detecting the ablation amount of the arc extinguishing nozzle in an ablation test, and the problem that the improved ablation resistance of the arc extinguishing nozzle cannot be detected in the prior art is solved.
In order to achieve the purpose, the technical scheme of the method for evaluating the ablation resistance of the arc extinguishing nozzle comprises the following steps: the method comprises the following steps of taking at least two arc extinguishing spouts with different single forming parameters, carrying out the ablation resistance detection method for the arc extinguishing spouts under the same test conditions, and comparing the ablation amount of each arc extinguishing spout to judge the influence of the single forming parameters on the ablation resistance.
The method for evaluating the ablation resistance of the arc extinguishing nozzle has the beneficial effects that: according to the method for evaluating the ablation resistance of the arc extinguishing nozzle, under the same test condition (the factors influencing the ablation amount such as voltage, current, ablation time and the like are not changed), at least two arc extinguishing nozzles with different single molding parameters are detected, and the influence of the single molding parameters on the ablation resistance of the arc extinguishing nozzles is judged according to the corresponding relation between the ablation amount and the single molding parameters (formula, molding process or shape), so that technical support is provided for the improvement of the subsequent arc extinguishing nozzles.
Further, the voltage level of the detection current is smaller than the voltage level corresponding to the arc extinguishing nozzle.
The insulating sleeve has the advantages that the insulating sleeve with lower voltage level can be arranged, and the cost is reduced.
Further, the current level of the detection current corresponds to the current level corresponding to the arc extinguishing nozzle.
The method has the advantage of ensuring the detection precision.
Further, dynamic compensation is carried out on the arcing time of each arc extinguishing nozzle in the ablation test, so that the total arcing time of each arc extinguishing nozzle is equal.
The method has the advantages that the arcing time is easy to detect but difficult to control, and the arcing time is dynamically compensated in the ablation test so that the total arcing time of each arc extinguishing nozzle in the ablation test is equal, so that the evaluation accuracy is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of the ablation resistance detection apparatus for an arc extinguishing nozzle according to the present invention;
FIG. 2 is a schematic structural view of the splice enclosure of FIG. 1;
FIG. 3 is a schematic structural view of the transition duct of FIG. 1;
in the figure: 1. the vacuum arc extinguishing chamber comprises a shell, 2, a vacuum arc extinguishing chamber main body, 3, a transition pipe, 31, a large-diameter flange, 32, a small-diameter flange, 4, a wiring sleeve, 41, FDLW7-40.5kV hollow composite insulators, 42, a conducting rod, 43, a hollow composite insulator flange, 5, an operating mechanism, 6, a basin-type insulator, 7, a static end, 8 and a dynamic end.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present application are described in further detail below with reference to examples.
Embodiment 1 of the ablation resistance detection device for an arc extinguishing nozzle of the present application: as shown in fig. 1 and fig. 2, the detecting device includes a housing 1, the housing 1 has a hollow chamber and a wire inlet and a wire outlet which are communicated with the hollow chamber, the wire inlet and the wire outlet are respectively connected with a wiring sleeve 4, and the wiring sleeve 4 and the housing 1 enclose a sealed chamber. The incoming line and the outgoing line of the shell 1 are arranged in a back-to-back mode, so that safety accidents caused by interference between incoming line cables and outgoing line cables can be avoided, when the safety inspection is carried out, the wiring sleeve 4 on the right side in the figure 1 is connected with a high-voltage cable, and the wiring sleeve 4 on the left side is grounded.
A vacuum arc extinguish chamber main body 2 used for installing an arc extinguish nozzle to be detected is arranged in the hollow cavity, and the vacuum arc extinguish chamber main body 2 is provided with a static end 7 and a movable end 8; the static end 7 and the dynamic end 8 are respectively electrically connected with the corresponding connection sleeve 4. An operating mechanism 5 is further arranged in the hollow cavity, and the operating mechanism 5 is used for driving a moving end 8 of the vacuum arc-extinguishing chamber to move so as to enable the detection device to be switched on or switched off.
The voltage class of the vacuum arc extinguish chamber main body 2 is 252kv, the shell 1 is a vacuum circuit breaker shell matched with the vacuum arc extinguish chamber main body 2, basin-type insulators 6 are arranged in both the wire inlet and the wire outlet of the shell 1, and the aperture of a basin-type insulator flange on each basin-type insulator is phi 405. The wiring sleeve 4 comprises an FDLW7-40.5kV hollow composite insulator 41 and a conductive rod 42 which penetrates through the FDLW7-40.5kV hollow composite insulator 41, wherein the conductive rod 42 is used for being electrically connected with a corresponding movable end 8 or a static end 7. As shown in fig. 3, the aperture of the hollow composite insulator flange 43 is phi 306, the basin-type insulator flange and the hollow composite insulator flange 43 are hermetically connected through the transition pipe 3, the transition pipe 3 has a large-diameter flange 31 and a small-diameter flange 32, the aperture of the large-diameter flange 31 is phi 405, the aperture of the small-diameter flange 32 is phi 306, and the sealed connection between the connection sleeve 4 and the housing 1 is realized through the switching of the transition pipe 3.
Sealed air chambers are formed on two sides of the basin-type insulator 6 respectively, a ventilation channel used for communicating the sealed air chambers on the two sides is arranged on a flange of the basin-type insulator 6, high-pressure gas needs to be filled into the shell 1 and the wiring sleeve 4 before detection so as to ensure the insulation performance of the detection device, and under the condition that the ventilation channel exists, the inflation and deflation operations can be realized at one time, so that the operation is convenient, and the time is saved.
The detection process of the specific embodiment 1 of the ablation resistance detection device for the arc extinguishing nozzle of the present application: the method comprises the following steps of firstly, weighing an arc extinguishing nozzle and measuring the structural size, secondly, putting the arc extinguishing nozzle on an ablation-resistant detection device, loading detection current (the current is 50kA and the voltage is 25 kV) on the ablation-resistant detection device so as to carry out ablation test on the arc extinguishing nozzle (the detection current is cut off for 8 times in the test process, and the accumulated arcing time is about 80ms by adopting a dynamic compensation mode), thirdly, taking down the arc extinguishing nozzle, wiping off ash, weighing the arc extinguishing nozzle and measuring the structural size, fourthly, comparing the weight before and after the arc extinguishing nozzle test and the size of a key part, recording the ablation amount of the arc extinguishing nozzle, and further judging the ablation-resistant performance of the arc extinguishing nozzle.
If the influence of a certain molding parameter on the ablation resistance of the arc extinguishing nozzle needs to be judged, at least two arc extinguishing nozzles with different single molding parameters (formula, molding process or shape) need to be taken, the ablation resistance detection of the arc extinguishing nozzle is carried out under the same test condition (the factors influencing the ablation such as voltage, current, ablation time and the like are not changed), the ablation resistance of each arc extinguishing nozzle is transversely compared, and the influence of the single molding parameter on the ablation resistance is judged.
Embodiment 5 of the ablation resistance detection device for an arc extinguishing nozzle of the present application: the difference between this embodiment and embodiment 1 is that the inlet and outlet are located on the same side of the housing axis.
Specific example 1 of the ablation resistance detection method for an arc extinguishing nozzle of the present application: the ablation resistance detection method for the arc extinguishing nozzle comprises the following steps; the method comprises the following steps of firstly weighing an arc extinguishing nozzle and measuring the structural size, secondly placing the arc extinguishing nozzle on an ablation-resistant detection device, loading detection current with the voltage value of 25kV and the current value of 50kA on the ablation-resistant detection device to perform an ablation test on the arc extinguishing nozzle, thirdly taking down the arc extinguishing nozzle, wiping off ash, weighing the arc extinguishing nozzle and measuring the structural size, and fourthly comparing the weight before and after the arc extinguishing nozzle test and the size of a key part and recording the ablation amount of the arc extinguishing nozzle.
Specific example 1 of the method for evaluating the ablation resistance of an arc-extinguishing spout of the present application: the method comprises the following steps of taking at least two arc extinguishing spouts with different single forming parameters, weighing the arc extinguishing spouts and measuring the structural size, putting the arc extinguishing spouts on an ablation-resistant detection device, loading detection currents with a voltage value of 25kV and a current value of 50kA on the ablation-resistant detection device under the same test condition to perform an ablation test on the arc extinguishing spouts, and dynamically compensating arc burning time when the detection currents are switched on and off every time so that the total arc burning time of each arc extinguishing spout is equal. Taking down the arc extinguishing nozzle, wiping off ash, weighing the arc extinguishing nozzle and measuring the structural size, and comparing the weight of the arc extinguishing nozzle before and after the test and the size of a key part to record the ablation amount of the arc extinguishing nozzle; and sixthly, comparing the ablation amount of each arc extinguishing nozzle, and judging the influence of the single forming parameter on the ablation resistance.
Specific example 2 of the method for evaluating the ablation resistance of an arc-extinguishing spout of the present application: the present embodiment is different from embodiment 1 only in that the voltage value of the detection current is different, and in the actual detection process, the voltage value of the detection current can be adjusted according to the actual detection requirement.
Specific example 3 of the method for evaluating the ablation resistance of an arc-extinguishing spout of the present application: the present embodiment is different from the specific embodiment 1 only in that the current value of the detection current is different, and in the actual detection process, the voltage value of the detection current can be adjusted according to the actual detection requirement, and preferably, the detection current is less than 50 kA.
Specific example 4 of the method for evaluating the ablation resistance of an arc-extinguishing spout of the present application: this embodiment differs from embodiment 1 only in that the arcing time is 10ms each, which is suitable for the case where the arcing time can be accurately controlled.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. A resistant detection device that erodees for arc extinguishing spout which characterized in that: comprises that
A housing having a hollow chamber;
the shell is provided with a wire inlet and a wire outlet;
the wire inlet and the wire outlet are respectively connected with a wiring sleeve, and the wiring sleeve and the shell are enclosed to form a sealed cavity;
the vacuum arc extinguishing chamber main body is arranged in the hollow cavity of the shell and is used for installing an arc extinguishing nozzle to be detected;
the vacuum arc extinguish chamber main body is provided with a static end and a dynamic end;
the static end and the dynamic end are respectively and electrically connected with the corresponding wiring sleeve.
2. The ablation resistance detection device for an arc extinguishing spout according to claim 1, characterized in that: and the voltage grade of the wiring sleeve is smaller than that of the arc extinguishing nozzle to be detected.
3. The ablation resistance detection device for an arc extinguishing spout according to claim 2, characterized in that: the wiring sleeve is connected with the wire inlet and the wire outlet through the transition pipe respectively, the size of one axial end of the transition pipe is matched with the wiring sleeve, and the size of the other end of the transition pipe is matched with the corresponding wire inlet or wire outlet.
4. The ablation resistance detection device for an arc extinguishing spout according to claim 1, 2 or 3, characterized in that: a basin-type insulator is arranged between the transition cylinder and the corresponding wire inlet and wire outlet, and two sides of the basin-type insulator form sealed air chambers respectively; and a ventilation channel for communicating the sealed air chambers on the two sides is arranged on the basin-type insulator.
5. The ablation resistance detection device for an arc extinguishing spout according to claim 1, 2 or 3, characterized in that: the wire inlet and the wire outlet are arranged in a back-to-back manner.
6. An ablation resistance detection method for an arc extinguishing nozzle is characterized in that: comprises the following steps; the method comprises the following steps of firstly weighing an arc extinguishing nozzle and measuring the structural size of the arc extinguishing nozzle, secondly placing the arc extinguishing nozzle on the ablation resistance detection device for the arc extinguishing nozzle as claimed in any one of claims 1 to 5, loading detection current on the ablation resistance detection device to perform an ablation test on the arc extinguishing nozzle, thirdly taking down the arc extinguishing nozzle, wiping off ash, weighing the arc extinguishing nozzle and measuring the structural size of the arc extinguishing nozzle, and fourthly comparing the weight before and after the test of the arc extinguishing nozzle and the size of a key part, and recording the ablation amount of the arc extinguishing nozzle.
7. An ablation resistance evaluation method for an arc extinguishing nozzle, characterized in that: the method comprises the following steps of taking at least two arc-extinguishing spouts with different single molding parameters, carrying out the method for detecting the ablation resistance of the arc-extinguishing spouts according to claim 6 under the same test conditions, and comparing the ablation amount of each arc-extinguishing spout to judge the influence of the single molding parameters on the ablation resistance.
8. The method for evaluating the ablation resistance of an arc-extinguishing spout according to claim 7, wherein: and the voltage grade of the detection current is smaller than the voltage grade corresponding to the arc extinguishing nozzle.
9. The method for evaluating the ablation resistance of an arc-extinguishing spout according to claim 7 or 8, characterized in that: and the current grade of the detection current corresponds to the current grade corresponding to the arc extinguishing nozzle.
10. The method for evaluating the ablation resistance of an arc-extinguishing spout according to claim 7 or 8, characterized in that: and dynamically compensating the arcing time of each arc extinguishing nozzle in the ablation test to ensure that the total arcing time of each arc extinguishing nozzle is equal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911149984.9A CN111220641A (en) | 2019-11-21 | 2019-11-21 | Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle |
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| CN201911149984.9A CN111220641A (en) | 2019-11-21 | 2019-11-21 | Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle |
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| CN1848337A (en) * | 2006-04-17 | 2006-10-18 | 瓦房店高压开关有限公司 | High-pressure vacuum circuit breaker |
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| CN106290041A (en) * | 2015-05-29 | 2017-01-04 | 国网智能电网研究院 | A kind of resistance to ablative test method of nozzle of circuit breaker material |
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2019
- 2019-11-21 CN CN201911149984.9A patent/CN111220641A/en active Pending
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| CN1848337A (en) * | 2006-04-17 | 2006-10-18 | 瓦房店高压开关有限公司 | High-pressure vacuum circuit breaker |
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| CN106093769A (en) * | 2016-06-29 | 2016-11-09 | 中国西电电气股份有限公司 | A kind of analysis method of arc-extinguishing chamber of circuit breaker electric life |
| US20180090913A1 (en) * | 2016-09-26 | 2018-03-29 | Bethel Idiculla Johnson | Medium voltage switchgear enclosure |
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