CN2290053Y

CN2290053Y - Portable tester for combustible gas total dissolved in insulating oil

Info

Publication number: CN2290053Y
Application number: CN 95201425
Authority: CN
Inventors: 贾常明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-25
Filing date: 1995-02-25
Publication date: 1998-09-02
Anticipated expiration: 2005-02-25

Abstract

The utility model relates to a portable tester for combustible gas total dissolved in insulating oil, being used for measuring the combustible gas total dissolved in the oil of oil-filling electric equipment, and the combustible gas total is used as a primary diagnosis for forecasting latent failures in the equipment. The utility model overcomes the defects of separated degasification and test, complicated structure, complicated operating performance, high cost, inconvenient carrying, etc. The utility model directly injects sample oil to an eluting pipe in the tester and uses a gas-carrying eluting method to accomplish the degasification, and then the eluting pipe, an air pump, a detector, etc. are connected into organic integration by a three-way valve and an electromagnetic valve. The utility model has multiple functions and achieves the goal of measuring the combustible gas total with fast speed and forecasting the failures of the equipment.

Description

Dissolving combustible gas total amount detector in the portable insulating oil

The utility model relates to a kind of instrument that detects the inflammable gas content that is dissolved in the insulation of electrical installation oil.

In the oil-filled insulation of electrical installation oil of normal operation, do not contain or inflammable gass such as few hydrogeneous, carbon monoxide, methane, ethane, ethene, acetylene.But when equipment generation latency fault, can make the combustible gas content that is dissolved in the oil or increase soon or slowly.Therefore, at present both at home and abroad all by detecting the inflammable gas content that dissolves in the oil, to forecasting (early diagnosis) in the latency fault of labour power equipment.

This type of detecting instrument is made up of degasser, gas storage steel cylinder, chromatograph etc. both at home and abroad.Test process is the oil sample that takes a morsel in the first slave unit, transports testing laboratory back, and through the degasser degassing, and then the gas injecting chromatograph that will deviate from is analyzed.(seeing GB7252-87 " transformer dissolved gas analysis and judgement guide rule ").The employed apparatus structure complexity of this method, complex operation, can not carry, involve great expense.In addition, there is combustible gas total content on-line monitoring instrument in Mitsubishi Co., Ltd., the cost height, and can only monitor a transformer.

The purpose of this utility model is a kind of degassing will be provided and detect the device that carries out together, realizes the latency failure prediction by detection combustible gas total amount.This instrument can be used as the preliminary surveying of HERALD equipment latency fault, in case note abnormalities, relend the rib gas chromatograph in addition repetition measurement confirm so that take maintenance measure early, prevent the accident extension.It has simplified testing, and the apparatus structure refining is easy to carry, and cost is low.Be suitable for having filled up the blank of dissolving combustible gas total amount portable surveying instrument in China's oil to using in the on-the-spot extensively generaI investigation of labour power equipment.

The purpose of this utility model is achieved in that a sample oil directly injects detector, adopt carrier gas Xian method of taking off in the wash-out pipe, to finish the degassing, institute takes off various combustible gases and directly brings to detecting device by solenoid valve, in detecting device combustible gas total concentration value is converted into electric signal, finishes testing process.

The gordian technique of the present utility model function that is to outgas is finished at a very little wash-out pipe of volume.In addition, pneumatic pump, wash-out pipe, detecting device and T-valve, needle valve etc. are installed on integral body of formation in the same casing compactly.The general assembly (TW) of this detector is equivalent to 1/4th of other test detector (still disregarding degassing equipment and 3 steel cylinders) approximately, and transformer station scene outside several kilometers even tens kilometers is easy to carry.Detect every kind of combustible gas concentration respectively with detecting various combustible gas total amounts replacements, reach the purpose of preliminary HERALD equipment fault.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.Fig. 1 is a dissolving combustible gas total amount detector structural representation in the portable insulating oil that the utility model proposes.Fig. 2 is a circuit block diagram.

The details and the working condition of the concrete device of the utility model are described below in conjunction with Fig. 1.

This detector structure:

1. small air pump 2. needle valves

3. solenoid valve 4. wash-out pipe bottoms

5. microwell plate 6. set collars

7. wash-out pipe top 8. solenoid valves

9. detecting device 10. needle valves

11. wash-out pipe 12. oil-ins suitable for reading

13. oil drain out 14. air intake openings

15. secondary oil drain out 16. T-valve

17. three-way connection 18. three-way connections

19. exhausr port 20. three-way connections

The operating process of this detector:

After the start, air pump and stabilized voltage supply, amplifier, display are started working.This moment, air entered the wash-out pipe through needle valve 2 and three-way connection 20 by wash-out pipe bottom air intake opening 14, saw through microwell plate 5 and 2., 1. entered detecting device through wash-out pipe suitable for reading 11 and solenoid valve 8.This moment, 13,12 and secondary oil drain out 15 of T-valve 18 were all closed, and display is designated as zero.

From oil-filled electrical equipment, take out a small amount of oil sample, inject wash-out pipe top 7 through T-valve 16 with syringe.Enter wash-out pipe bottom 4 after regulating flows from the air of pneumatic pump 1 with needle valve 2, see through microwell plate 5 and form a large amount of minute bubbles.Minute bubbles are about to that the combustible gas wash-out comes out in the oil in the oil reservoir uphill process, 2., 1. bring to detecting device 9 through solenoid valve 8.When a pair of catalysis sensitive element platinum filament in the detecting device contacts with combustible gas, one of them element and airborne oxygen generation flameless burning; Another element does not react.The element that reacts is heated immediately, and the resistance of platinum filament is changed, and has destroyed the balance of electric bridge, output mv signal, and this output quantity and combustible gas total amount are a stable linear relation, are shown by display after amplifying.

The oil extraction process: open at first simultaneously solenoid valve 3 and solenoid valve 8 3., 1., open the oil drain out 13 and the secondary oil drain out 15 of T-valve 16 then, this moment, the air one tunnel of coming in through needle valve 2 still entered wash-out pipe air intake opening 14; Another road through solenoid valve 3 2., 1., enter wash-out pipe top through three-

way connection

17,18 from wash-out pipe suitable for reading 11.Under the air-flow effect, the oil above the microwell plate 5 is discharged (close this moment 12) through the mouth 13 of T-valve 18.A spot of oil is discharged through secondary oil drain out 15 below the microwell plate 5.After having arranged oil, close solenoid valve 3,8, oil drain out 13 and secondary oil drain out 15, promptly finish once test.

In the oil extraction process, 3., 1. portion of air still enters detecting device through T-valve 17, needle valve 10 and solenoid valve 8, to keep the stable of air-flow.Needle valve 10 is used for regulating air mass flow.

Claims

1. dissolve inflammable gas total amount detector in a portable insulating oil, it is characterized in that it is to be constituted and had corresponding operation procedure by deaeration pipe, pneumatic pump, detecting device and T-valve, needle valve, connection threeway: through T-valve 16 oil sample is injected deaeration pipe top 7 with syringe, the air-flow that is provided by pneumatic pump enters Xian through air intake opening 14 and takes off pipe bottom 4, see through microwell plate 5, the combustible gas wash-out that dissolves in the oil is come out, 2., 1. enter detecting device and detected through solenoid valve 8, output mv signal, this signal is exaggerated and shows.The oil extraction process: open simultaneously solenoid valve 3 and solenoid valve 8 3., 1., open the oil drain out 13 and the secondary oil drain out 15 of T-valve 16 then, this moment, airflow one tunnel still entered deaeration pipe air intake opening 14, another road through solenoid valve 3 7., 1., three-way connection 17,18, enter the top of wash-out pipe from suitable for reading 11 of wash-out pipe, waste oil is discharged through oil drain out 13 and secondary oil drain out 15 under the air-flow effect.Needle valve is in order to regulate air mass flow.

2. detector as claimed in claim 1 is characterized in that being made up of top, lower part and the microwell plate that is installed between two parts, and wherein there is inlet, outlet 11 on top and advances, oil drain out 16, and there are air intake opening 14 and secondary oil drain out 15 in the lower part.

3. detector as claimed in claim 1 is characterized in that controlling solenoid valve 3, solenoid valve 8 and the T-valve 16 of gas flow in automatic deaerating process and the oil extraction process.