CN201653625U - Testing device and system for on-load dynamic pressure in arc extinguish chamber of sulphur hexafluoride circuit breaker - Google Patents
Testing device and system for on-load dynamic pressure in arc extinguish chamber of sulphur hexafluoride circuit breaker Download PDFInfo
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- CN201653625U CN201653625U CN2010201359663U CN201020135966U CN201653625U CN 201653625 U CN201653625 U CN 201653625U CN 2010201359663 U CN2010201359663 U CN 2010201359663U CN 201020135966 U CN201020135966 U CN 201020135966U CN 201653625 U CN201653625 U CN 201653625U
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- pressure
- sensor
- jet pipe
- isolating switch
- air cylinder
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Abstract
The utility model discloses a testing device and system for on-load dynamic pressure in an arc extinguish chamber of a sulphur hexafluoride circuit breaker. The testing device comprises a measuring instrument and a sensor, wherein the sensor comprises at least one spray pipe measuring sensor used for inducing the pressure of a corresponding measuring point inside a spray pipe of the circuit breaker, the upper end of a pressure measuring opening of the spray pipe measuring sensor is connected with an insulating pressure lead pipe with the tail end thereof extending to the spray pipe of the circuit breaker. The insulating pressure lead pipe of the utility model adopts a pipeline with insulating and high-temperature resistant materials, and ordinary temperature gas is separated from the high temperature gas inside the pipe to reach the sensor during the pressure transmission, so that the pressure of the measuring point inside the arc extinguish chamber can be led to positions with safe temperature and electric potential; and the sensor is then mounted to measure, so as to avoid the damage on the sensor and a measurement system thereof due to the high temperature of electric arc and high voltage of switch broken sections, and solve the separation problems of high temperature and high voltage.
Description
Technical field
The utility model relates to the pressure test technology, and especially SF 6 arc-extinguishing chamber of circuit breaker has the test of carrying dynamic pressure.
Background technology
SF 6 arc-extinguishing chamber of circuit breaker has the test of carrying dynamic pressure, be meant the dynamic pressure change procedure of in the sulfur hexafluoride breaker interrupting process, testing diverse location in the SF 6 arc-extinguishing chamber of circuit breaker, and the dynamic pressure of diverse location changes the Flow Field Distribution that can reflect arc-plasma in the arc-chutes, therefore SF 6 arc-extinguishing chamber of circuit breaker has the test result of carrying dynamic pressure can check, revise and improve electric arc calculating simulation means, improves the circuit breaker design level.But the working environment in the SF 6 arc-extinguishing chamber of circuit breaker has the characteristics of high temperature, high voltage and space compactness, the testing tool of existing use usual pressure sensor is when detecting, can be subjected to the electromagnetic interference (EMI) of high voltage, heavy current and electric arc in the arc-chutes and cause measuring inaccurate, and the damage that can cause sensor, measuring instrument to survey of the high voltage between high arc temperature and killer switch fracture, sensor and testing tool thereof also can influence the Electric Field Distribution between the killer switch fracture conversely on the other hand.
The utility model content
The purpose of this utility model be to provide a kind of antijamming capability strong, measure accurately that SF 6 arc-extinguishing chamber of circuit breaker has the dynamically pressure testing device of carrying, provide a kind of SF 6 arc-extinguishing chamber of circuit breaker of this pressure test device that adopts that the dynamically pressure testing system of carrying is arranged simultaneously.
SF 6 arc-extinguishing chamber of circuit breaker of the present utility model has the technical scheme of carrying the dynamically pressure testing device to be: a kind of SF 6 arc-extinguishing chamber of circuit breaker has the dynamically pressure testing device of carrying, comprise measuring instrument and sensor, described sensor comprises that at least one is used to respond to the jet pipe survey sensor of corresponding measuring point pressure in the isolating switch jet pipe, and the pressure tap upper end of described at least one jet pipe survey sensor is connected to end and is used to feed the interior insulating pressure skirt of isolating switch jet pipe.
Described insulating pressure skirt is a Pitot tube.
Be filled with the damping particle in the described insulating pressure skirt.
Described sensor is connected by cable with measuring instrument, and described cable and sensor outside are provided with screen layer.
SF 6 arc-extinguishing chamber of circuit breaker of the present utility model has the technical scheme of carrying the dynamically pressure testing device to be: a kind of SF 6 arc-extinguishing chamber of circuit breaker has the dynamically pressure testing system of carrying, comprise breaker body and go up the proving installation that connects, breaker body comprises isolating switch jet pipe and isolating switch air cylinder, proving installation comprises measuring instrument and sensor, described sensor comprises that at least one is used to respond to the jet pipe survey sensor of corresponding measuring point pressure in the isolating switch jet pipe, offer jet pipe measuring point through hole on the tube wall of described isolating switch jet pipe, the pressure tap of described each jet pipe survey sensor is connected to the insulating pressure skirt, and insulating pressure skirt end seal is terminated in the described jet pipe measuring point through hole.
Described insulating pressure skirt is a Pitot tube.
Be filled with the damping particle in the described insulating pressure skirt.
Described sensor comprises the air cylinder survey sensor that is used to respond to corresponding measuring point pressure in the isolating switch air cylinder, the air cylinder survey sensor is installed in the air cylinder measuring point through hole that correspondence is offered on the isolating switch air cylinder casing wall, is folded with insulation course between the hole wall of air cylinder measuring point through hole and the air cylinder survey sensor.
Described breaker body comprises the moving main contact of the isolating switch of being located at isolating switch jet pipe bottom, and the installation site of described jet pipe survey sensor is lower than moving main contact.
Described each sensor is connected by cable with measuring instrument and the isolating switch that is placed in inside and outside, and described cable and each sensor outside are equipped with screen layer, is provided with between described cable and the case for circuit breaker to be used to the insulator pin plate that shields and seal.
Proving installation of the present utility model and test macro all are provided with the insulating pressure skirt in the pressure tap of jet pipe survey sensor, the insulating pressure skirt is selected the pipeline of insulation and exotic material, gas at normal temperature when transmitting pressure in the pipe is isolated high-temperature gas and is arrived sensor, thereby the measuring point pressure in the arc-chutes is led to temperature and potential safety position, sensor installation is measured again, avoid high voltage between high arc temperature and switch fracture to the damage of sensor and measuring system thereof, solved high temperature and high voltage isolating problem; And this deriving structure can make sensor away from isolating switch fracture electric field, avoids sensor and measuring system thereof to split the influence of closing Electric Field Distribution between fracture, and self is not subjected to this electric field effects yet, thereby makes measurement more accurate.
Description of drawings
Fig. 1 is the mounting structure synoptic diagram of each sensor of pressure testing system of the present utility model;
Fig. 2 is the electrical schematic diagram of pressure test device of the present utility model;
Fig. 3 is the test waveform figure of the actual test of the utility model.
Embodiment
As shown in Figure 1 and Figure 2, pressure testing system of the present utility model, comprise breaker body and go up the proving installation that connects, the structure and the prior art of breaker body are similar, comprise the isolating switch jet pipe 1 that air cylinder 4, moving main contact 3 and moving main contact end are connected, be inserted with moving arcing contact 2 in the mouth of pipe of isolating switch jet pipe 1 and an end that moving main contact 3 is connected, be inserted with quiet arc contact 5 in the mouth of pipe of isolating switch jet pipe 1 away from moving main contact 3 one ends.On working gas flows to, isolating switch jet pipe 1 offers upstream measuring point through hole A near on the tube wall of moving arcing contact 2, isolating switch jet pipe 1 offers downstream measuring point through hole C near on the tube wall of quiet arc contact, offers the measuring point through hole B of throat on the tube wall of isolating switch jet pipe 1 between the measuring point through hole of upstream and downstream.Offer air cylinder measuring point through hole D on the casing wall of described air cylinder 4.
Described proving installation comprises the measuring instrument of being located at outside the isolating switch 10, measuring instrument 10 is connected with three jet pipe survey sensors 6 and an air cylinder survey sensor 11 by the cable 13 that passes case for circuit breaker hand hole 12, also sensor is powered in the time of cable 13 transmission signals.Three jet pipe survey sensors 6 are installed on the position that is lower than the moving main contact 3 of isolating switch on the isolating switch.Be provided with between described cable 13 and the case for circuit breaker hand hole 12 and be used to the insulator pin plate 14 that shields and seal.On the pressure tap of described three jet pipe survey sensors 6 respectively termination have three to thoroughly do away with edge pressure skirts 9, the survey mouth of three eradication edge pressure skirts 9 sealed end respectively is connected in the upper, middle and lower trip measuring point through hole of described isolating switch jet pipe 1, described air cylinder survey sensor 11 is installed in the air cylinder measuring point through hole 8 of described isolating switch air cylinder 4, is folded with insulation course 15 between the hole wall of air cylinder measuring point through hole 8 and the air cylinder survey sensor 11.Described cable and sensor outside all have screen layer, and screen layer dots in Fig. 2.
Described insulating pressure skirt 9 is a Pitot tube, adopt insulation and resistant to elevated temperatures polytetrafluoroethylmaterial material, when Pitot tube transmits pressure, the high-temperature gas that the gas at normal temperature of close sensor one end in the pipe can be isolated the other end arrives sensor, avoid high-temperature gas to damage sensor, and after adopting Pitot tube, make the installation site of sensor can be lower than moving main contact, sensor neither influences the Electric Field Distribution of contact of breaker fracture, and self is not subjected to this electric field effects yet.
Further, can load the damping particle that is used to increase damping in the described Pitot tube, the damping particle adopts polytetrafluoroethylmaterial material, is of a size of 1-2mm, when transmitting pressure, produce the pressure wave scattering, can reduce the interference that the vibration of Pitot tube internal pressure ripple constitutes pressure survey.
Insulating pressure skirt in the foregoing description is selected the Pitot tube of polytetrafluoroethylmaterial material for use, in fact also can select other forms that those skilled in the art can obtain from prior art and the high-temperature insulation conduit that is used to transmit gaseous tension of material for use, also can fill the damping particle except that polytetrafluoroethylmaterial material that those skilled in the art can obtain from prior art in the conduit.
Fig. 3 fills the 0.7MPa(absolute pressure for the isolating switch of actual test) sulfur hexafluoride gas and the heavy current pressure survey waveform under cut-offfing, air cylinder adopts directly and measures, jet pipe upstream, throat adopt Pitot tube and Pitot tube to add damping method respectively and measure, and the downstream adopts the Pitot tube method to measure.Each waveform is respectively by its sequence number:
1-undamped Pitot tube is measured jet pipe upstream pressure: 0.5MPa/div;
2-undamped Pitot tube is measured nozzle throat pressure: 0.5MPa/div;
3-undamped Pitot tube is measured nozzle throat pressure: 0.5MPa/div;
4-directly measures air cylinder pressure: 0.5MPa/div;
5-has the damping Pitot tube to measure jet pipe upstream pressure: 0.5MPa/div;
6-has the damping Pitot tube to measure nozzle throat pressure: 0.5MPa/div;
7-moving contact stroke: 92mm/div; 8-electric current: 32kA/div;
9-arc voltage: 1kV/div; Time: 10ms/div.
As can be seen from the figure, air cylinder pressure is directly to measure, and does not have the influence of Pitot pressure ripple vibration, does not have the serious higher-order of oscillation on the pressure waveform.The serious higher-order of oscillation has appearred on the pressure waveform that the Pitot tube method is measured.The analysis of causes of this phenomenon is that electric arc is jiggly, produces steep pressure fluctuation in arc-chutes, passes through the back reflective that comes of Pitot tube, produces the higher-order of oscillation, is superimposed upon on the pressure waveform.Relatively jet pipe upstream undamped Pitot tube and the pressure waveform that has the damping Pitot tube to measure have the damping Pitot tube effectively to suppress the higher-order of oscillation.There is the pressure waveform of jet pipe upstream pressure waveform that the damping Pitot tube records and air cylinder identical substantially, determines that thus the jet pipe upstream pressure waveform that has the damping Pitot tube to record is substantially accurately.For the nozzle throat of arc-chutes, it is important that the pressure of arc blow-out process changes analyzing the isolating switch performance, and the pressure that the pressure measurement method of employing Pitot tube damping can be measured the arc blow-out process of nozzle throat exactly changes waveform.Open the pressure pulse of nozzle throat appearance in the past as for spout, adopt the method for Pitot tube damping not measure well, but this signal is unimportant.The amplitude of nozzle throat pressure pulse equals the corresponding force value constantly in jet pipe upstream, therefore can read from jet pipe upstream pressure waveform.
Claims (10)
1.
A kind of SF6 arc-extinguishing chamber of circuit breaker has the dynamically pressure testing device of carrying, comprise measuring instrument and sensor, it is characterized in that: described sensor comprises that at least one is used to respond to the jet pipe survey sensor of corresponding measuring point pressure in the isolating switch jet pipe, and the pressure tap upper end of described at least one jet pipe survey sensor is connected to end and is used to feed the interior insulating pressure skirt of isolating switch jet pipe.
2.
Pressure test device according to claim 1 is characterized in that: described insulating pressure skirt is a Pitot tube.
3.
Pressure test device according to claim 1 and 2 is characterized in that: be filled with the damping particle in the described insulating pressure skirt.
4.
Pressure test device according to claim 3 is characterized in that: described sensor is connected by cable with measuring instrument, and described cable and sensor outside are provided with screen layer.
5.
A kind of SF6 arc-extinguishing chamber of circuit breaker has the dynamically pressure testing system of carrying, it is characterized in that: comprise breaker body and go up the proving installation that connects, breaker body comprises isolating switch jet pipe and isolating switch air cylinder, proving installation comprises measuring instrument and sensor, described sensor comprises that at least one is used to respond to the jet pipe survey sensor of corresponding measuring point pressure in the isolating switch jet pipe, offer jet pipe measuring point through hole on the tube wall of described isolating switch jet pipe, the pressure tap of described each jet pipe survey sensor is connected to the insulating pressure skirt, and insulating pressure skirt end seal is terminated in the described jet pipe measuring point through hole.
6.
Pressure testing system according to claim 5 is characterized in that: described insulating pressure skirt is a Pitot tube.
7.
According to claim 5 or 6 described pressure testing systems, it is characterized in that: be filled with the damping particle in the described insulating pressure skirt.
8.
Pressure testing system according to claim 7, it is characterized in that: described sensor comprises the air cylinder survey sensor that is used to respond to corresponding measuring point pressure in the isolating switch air cylinder, the air cylinder survey sensor is installed in the air cylinder measuring point through hole that correspondence is offered on the isolating switch air cylinder casing wall, is folded with insulation course between the hole wall of air cylinder measuring point through hole and the air cylinder survey sensor.
9.
Pressure testing system according to claim 8 is characterized in that: described breaker body comprises the moving main contact of the isolating switch of being located at isolating switch jet pipe bottom, and the installation site of described jet pipe survey sensor is lower than moving main contact.
10. pressure testing system according to claim 9, it is characterized in that: described each sensor is connected by cable with measuring instrument and the isolating switch that is placed in inside and outside, described cable and each sensor outside are equipped with screen layer, are provided with between described cable and the case for circuit breaker to be used to the insulator pin plate that shields and seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201359663U CN201653625U (en) | 2010-03-20 | 2010-03-20 | Testing device and system for on-load dynamic pressure in arc extinguish chamber of sulphur hexafluoride circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201359663U CN201653625U (en) | 2010-03-20 | 2010-03-20 | Testing device and system for on-load dynamic pressure in arc extinguish chamber of sulphur hexafluoride circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201653625U true CN201653625U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201359663U Expired - Lifetime CN201653625U (en) | 2010-03-20 | 2010-03-20 | Testing device and system for on-load dynamic pressure in arc extinguish chamber of sulphur hexafluoride circuit breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064395A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in elastic ball |
| CN110706971A (en) * | 2019-09-25 | 2020-01-17 | 厦门钻铂能源技术有限公司 | Waterproof and antiriot device for emergency cut-off information transmission |
| CN111192800A (en) * | 2020-01-08 | 2020-05-22 | 平高集团有限公司 | Pressure guide pipe for arc extinguishing chamber pressure measurement and arc extinguishing chamber pressure measurement device |
| CN111207874A (en) * | 2020-01-13 | 2020-05-29 | 平高集团有限公司 | Pressure guide pipe testing device and method for circuit breaker |
| CN111272320A (en) * | 2020-02-07 | 2020-06-12 | 云南电网有限责任公司电力科学研究院 | High-pressure gas circuit breaker spout transient pressure testing arrangement |
-
2010
- 2010-03-20 CN CN2010201359663U patent/CN201653625U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064395A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in elastic ball |
| CN110706971A (en) * | 2019-09-25 | 2020-01-17 | 厦门钻铂能源技术有限公司 | Waterproof and antiriot device for emergency cut-off information transmission |
| CN110706971B (en) * | 2019-09-25 | 2021-12-14 | 厦门钻铂能源技术有限公司 | Waterproof and antiriot device for emergency cut-off information transmission |
| CN111192800A (en) * | 2020-01-08 | 2020-05-22 | 平高集团有限公司 | Pressure guide pipe for arc extinguishing chamber pressure measurement and arc extinguishing chamber pressure measurement device |
| CN111207874A (en) * | 2020-01-13 | 2020-05-29 | 平高集团有限公司 | Pressure guide pipe testing device and method for circuit breaker |
| CN111272320A (en) * | 2020-02-07 | 2020-06-12 | 云南电网有限责任公司电力科学研究院 | High-pressure gas circuit breaker spout transient pressure testing arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |