CN2747583Y

CN2747583Y - Check mechanism for failure detector of sulphur hexafluoride electric equipment

Info

Publication number: CN2747583Y
Application number: CN 200420150516
Authority: CN
Inventors: 游荣文
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-24
Filing date: 2004-09-24
Publication date: 2005-12-21
Anticipated expiration: 2014-09-24

Abstract

The utility model relates to a check mechanism for failure detector of sulphur hexafluoride electric equipment which is characterized in that the check mechanism for failure detector of sulphur hexafluoride electric equipment is provided with an output tube used for communicating with the air outlet at the lower part of the casing of electric equipment in which sulphur hexafluoride is filled. The output terminal of the output tube is connected with a sulfur dioxide detector. The check mechanism of the utility model is favorable for the detector to obtain the failure signal in the sulphur hexafluoride electric equipment, give an alarm, diagnose the failure, etc.

Description

The testing agency of sulfur hexafluoride electrical equipment fault locator

Technical field

The utility model relates to a kind of content by sulphuric dioxide and sulfuretted hydrogen in the detection sulfur hexafluoride electrical equipment internal gas and comes quick diagnosis to go out the testing agency whether sulfur hexafluoride electrical equipment inside exists the fault locator of defective.

Background technology

Sulfur hexafluoride gas has good chemical stability and excellent insulating property and arc extinction performance, therefore often is used in the electrical equipment, for the safety and economic operation of electric system has played good effect.But because the quality of solid insulating material, manufacturing, installation and maintenance technology etc. also come with some shortcomings in the electric insulation equipment, still can there be some insulation defects unavoidably during use, and owing to these electric insulation equipment all seal in use, the external world is difficult in time know the fault of the inside generation, thereby cause accident, bring great economic loss and harmful effect to society.Though at present existing detecting instruments exist detection sensitivity low in order to carry out conventional preventive trial, and are low to the recall rate of defective, and generally all need have a power failure and shortcoming such as just can detect.

Summary of the invention

The purpose of this utility model is to provide a kind of testing agency of sulfur hexafluoride electrical equipment fault locator, and this mechanism helps that detector obtains the fault-signal of sulfur hexafluoride electrical equipment inside so that detector is reported to the police and processing such as fault diagnosis.

Applicant is learnt through a large amount of actual detected and fault diagnosis example: solid insulating materials such as the insulator of sulfur hexafluoride electric insulation device interior and drive link are thermosetting epoxy resin, when inside exists shelf depreciation or serious overheated defective, under the effect of heat and electricity, sulfur hexafluoride and epoxy resin generation cracking can generate subfluoride and sulfide; And then to sum up the principal character gas that produces under various failure conditions be SO2 and H2S.Because these two kinds component concentration is higher, toxicity is little and easy demarcation, thereby can come judgment device inside whether to have fault by the content that detects these gases.

Of the present utility model being characterised in that: be provided with in order to be filled with the efferent duct that the venthole of the electrical equipment shell bottom of sulfur hexafluoride is connected, be connected with the sulphuric dioxide detecting device on its output terminal with inside.

When the venthole of efferent duct and sulfur hexafluoride electrical equipment lower housing portion is connected, gas in the sulfur hexafluoride electrical equipment body flows into the sulphuric dioxide detecting device through efferent duct and detects, in case sulfur hexafluoride electrical equipment is inner when shelf depreciation or serious overheated phenomenon take place, cracking will take place in sulfur hexafluoride and epoxy resin under the effect of heat and electricity, generating portion sulphuric dioxide, so detector can detect this signal by the sulphuric dioxide detecting device, so that further carry out fault diagnosis and warning.

Than prior art, the utility model not only helps detector reports to the police and fault diagnosis by the fault-signal that this testing agency obtains sulfur hexafluoride electrical equipment inside, and simple in structure, highly sensitive, good stability.

Description of drawings

Fig. 1 is the utility model embodiment organigram (7 are the detector of the utility model testing agency among the figure).

Fig. 2 is the electronics block diagram of the detector of the utility model testing agency.

Embodiment

The utility model embodiment is characterised in that: be provided with in order to be filled with the efferent duct 1 that the venthole of the electrical equipment shell bottom of sulfur hexafluoride is connected with inside, be connected with sulphuric dioxide detecting device 5 on its output terminal.

Be connected with four-way connection 3 on the output terminal of above-mentioned efferent duct, this four-way connection is connected with pressure transducer 4, sulphuric dioxide detecting device 5 and hydrogen sulfide detector 6 respectively.

Be serially connected with filtrator and pressure-regulating valve 2 on the input end of above-mentioned efferent duct.

During use, the efferent duct of this instrument is connected with the venthole of sulfur hexafluoride electrical equipment lower housing portion, regulating the pressure-regulating valve valve makes gas flow into testing agency, after pressure transducer detects gas flow and reaches setting value, enter SO 2 sensor and hydrogen sulfide sensor respectively and detect its content.Thereby can judge inside electric appliance and whether have fault.

During detection, can carry out the intellectuality diagnosis and propose handling suggestion the device interior fault from 0～〉=20 μ l/l from 0～〉=20 μ l/l and concentration of hydrogen sulfide according to sulfur dioxide concentration in the gas.

Circuit theory of the present utility model is: gas enters instrument after flow control system, flows into SO2 respectively, the H2S sensor detects.Output signal is delivered to microprocessor and A/D converter through the conditioning unit, converts the gas concentration of analog quantity to digital quantity, does logical process, judgement by microprocessor, shows instantaneous value and the maximal value that detects by LCD, and with the data storage that detects.When the concentration over-standard of failure gas, expert system will judge the result who detects, and proposes corresponding handling suggestion.The detection data of machine stored and diagnostic result all can be downloaded and teletransmission by the RS232 interface.

The utility model is based on have been done to succeed in developing after a large amount of investigation to the generation rule of the structure of sulfur hexafluoride electric insulation device interior, material, failure process and decomposition gas.It is the fault signature component that the utility model is selected SO2 and H2S, adopts the process of gas path among Fig. 1, realizes the fast detecting to the sulfur hexafluoride electrical equipment internal fault, and carries out intelligent comprehensive by fault diagnosis expert system and judge.In addition, the utility model uses high capacity, high performance rechargeable battery as power supply, and only 30 seconds detection time, about consumption gas 100ml, equipment need not have a power failure during detection.That this instrument has is highly sensitive, good stability, air consumption are few, and test need not to have a power failure, and can carry out the remarkable advantage of intelligent diagnosis, and it is succeeded in developing, and has filled up the blank of China, and this detection technique is in the leading level in the world.

The utility model is not only novel, simple in structure, and test is sensitive, easy to use, and its popularizing application prospect is very considerable.

Claims

1. the testing agency of a sulfur hexafluoride electrical equipment fault locator is characterized in that: be provided with in order to be filled with the efferent duct that the venthole of the electrical equipment shell bottom of sulfur hexafluoride is connected with inside, be connected with the sulphuric dioxide detecting device on its output terminal.

2. the testing agency of sulfur hexafluoride electrical equipment fault locator according to claim 1, it is characterized in that: be connected with four-way connection on the output terminal of described efferent duct, this four-way connection is connected with hydrogen sulfide detector with pressure transducer, sulphuric dioxide detecting device respectively.

3. the testing agency of sulfur hexafluoride electrical equipment fault locator according to claim 1 and 2 is characterized in that: be serially connected with filtrator and pressure-regulating valve on the input end of described efferent duct.