CN201348579Y

CN201348579Y - Sulfur hexafluoride sample collection device

Info

Publication number: CN201348579Y
Application number: CNU200920001712XU
Authority: CN
Inventors: 姚强; 李毅; 刘永
Original assignee: Chongqing Electric Power Scientific Research Institute
Current assignee: Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd; State Grid Corp of China SGCC
Priority date: 2009-01-14
Filing date: 2009-01-14
Publication date: 2009-11-18
Anticipated expiration: 2019-01-14

Abstract

The utility model discloses a sulfur hexafluoride sample collection device with a quick intubation gas-taking joint, wherein the shape of the sulfur hexafluoride sample collection device is the box structure with an upwelling cover and a control panel and a display screen are respectively set on the fastening surfaces opposite to the box and the upwelling cover and a quick intubation type gas path interface and a power supply interface are set on the periphery of the box and a triple valve, a SF6 flow electronic controller, a micro pump, a solenoid valve and an integrated circuit control system are set in the box. The collection device uses the portable design and full-sealing sampling way to ensure the sampler undistorted and has flow control function and the flow is accurately set and the collection device is convenient for coupling with the SF6 gas detection instrument with higher flow accuracy requirement in perfect agreement with the electric power trade standard of 'SF6 gas sampling method for electric device'.

Description

The sulfur hexafluoride sample gathering apparatus

Technical field

The utility model relates to the gaseous sample collecting device of power industry, exactly is SF ₆The gas sample collection apparatus of (sulfur hexafluoride) electrical equipment.

Background technology

Along with development of electric power industry, SF ₆The quantity of electrical equipment installation and operation is on the increase, to SF ₆The supervision of gas becomes more and more important, and institute's sample thief must be able to be represented the feature of most of gas in the apparatus body, and will guarantee not polluted by ambient atmos.

Present sample mode mainly contains two kinds:

1) sampling steel cylinder

At first steel cylinder must be vacuumized when using the sampling of sampling steel cylinder, because vacuum pump is bigger, this process is generally in testing laboratory's operation, and three-way valve is arranged at sampling steel cylinder top, after vacuum pump and sampling steel cylinder connect, rotate T-valve, connect steel cylinder and begin to vacuumize, when the pressure vacuum gauge at steel cylinder top shows that pressure is zero, continue 1-2 minute again, rotate T-valve, disconnect vacuum pump, steel cylinder vacuumizes to be finished.The on-the-spot steel cylinder of having taken out vacuum that uses is sampled, should at first pipeline and equipment be connected, the opening device valve, flushing line half a minute, again pipeline is connected with steel cylinder, rotates T-valve and connect steel cylinder and equipment, begin sampling, owing to pipeline is not vacuumized, unavoidably can bring air and moisture content into.In a single day steel cylinder takes place simultaneously leak, then can't collected specimens.

2) sampling bag

Sampling bag is because valve and the pressure-display device that does not conveniently vacuumize, the general backwashing manner that adopts is sampled, earlier the air in the sampler bag is got rid of, after sampler bag and equipment are connected, charged into sample gas, the closing device valve, sample gas is got rid of, 3 times so repeatedly, collected specimens again, sampling process is loaded down with trivial details, and is difficult to guarantee cleaning up and isolation fully to external world of sampling container.

The utility model content

At the deficiency that prior art exists, the utility model aims to provide a kind of portable sulfur hexafluoride gas sample collection apparatus.

The technical solution adopted in the utility model is:

A kind of sulfur hexafluoride sample gathering apparatus, this equipment has fast intubate and gets the gas joint, its profile is the body structure that is provided with upturning lid, be respectively equipped with control panel and display screen on the casing buckling surface relative with upturning lid, the casing periphery is provided with push-in air-path interface and power interface, and box house is provided with T-valve, SF ₆Flow electronic controller, minipump, solenoid valve and integrated circuit control system, three interfaces of T-valve are connected to gas source interface, sampling container interface and minipump by pipeline respectively, and wherein the pipeline of gas source interface is provided with first solenoid valve and SF ₆The flow electronic controller, the pipeline of sampling container interface is provided with second solenoid valve, and the pipeline of vacuum pump is provided with the 3rd solenoid valve, and the integrated circuit control system is controlled each solenoid valve, SF ₆Flow electronic controller and minipump, be used to import flow process parameter control panel and can the display analysis state and the display screen of duty parameter be connected to the integrated circuit control system.

Be provided with built-in supply module in the described casing.

The pipeline of described sampling container interface is provided with pressure transducer.

Described pressure transducer adopts the wide range differential pressure pick-up.

Described SF ₆The flow electronic controller is formed closed loop feedback system by flow sensor and flowrate control valve.

Described solenoid valve adopts self-pressure-sealed formula electromagnetic switch valve.

The pipeline of described gas source interface is provided with the flowmeter that is connected to the integrated circuit control system.

The utility model portable design, hermetically sealed sampling can be guaranteed that sample is undistorted, and possess flow control function, can set flow accurately, the SF of being convenient to and flow accuracy being had relatively high expectations ₆Gas detecting instrument connects, and meets " electrical equipment SF fully ₆The sampling method of gas " power industry standard.Possess following function:

(1) satisfies the sampling request that the laboratory sulfur hexafluoride gas is analyzed, guaranteeing that sample is sampled at the scene is not subjected to the influence of moisture content and oxygen in the outside air, system vacuumizes sampling system by adopting miniature oilless vacuum pump, after connecting the startup instrument that finishes, pipeline automatically pipeline is vacuumized, use sample wash pipeline and sampling container then, washing time can be set through row according to actual needs, guarantees that institute's sample thief is not affected by environment;

(2) satisfy on-the-spot detector tube sampling request, this system can setting-up time and flow, is controlled in the official hour sulfur hexafluoride gas instrument by the flow of the setting detector tube of flowing through.Setting-up time finishes sampling to back system automatic-closing valve.Owing to controlled the amount of the sulfur hexafluoride gas that flows through detector tube, guaranteed the repeatability that detector tube detects.

Description of drawings

Fig. 1 is a laboratory sample collecting flowchart synoptic diagram;

Fig. 2 is on-the-spot test sample sampling schematic flow sheet.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of reference numerals is as follows:

1---source of the gas 2---sampling container

3---first solenoid valves 3 '---, second solenoid valve

3 "---the 3rd solenoid valve 4---T-valve

5---flow controller 6---pressure vacuum gauge

7---flowmeter 8---oilless vacuum pump

This sulfur hexafluoride gas sample collecting device has fast intubate and gets the gas joint, can carry out the work rapidly in the scene, its profile adopts portable design, constitute by upturning lid and casing, be respectively equipped with control panel and display screen on both relative buckling surfaces, the casing periphery is provided with push-in air-path interface and power interface, and box house is provided with T-valve, SF ₆Flow electronic controller, minipump, solenoid valve and integrated circuit control system, minipump flow big (2.6-3.5L/Min), continuously-running, volume are little, in light weight, three interfaces of T-valve are connected to gas source interface, sampling container interface and minipump by pipeline respectively, and wherein the pipeline of gas source interface is provided with first solenoid valve, SF ₆Flow electronic controller and flowmeter, SF ₆The flow electronic controller is formed closed loop feedback system by flow sensor and flowrate control valve, if the feedback of flow sensor does not reach setting value, then corresponding automatic adjustment operation valve, thereby dependable flow is stabilized in setting value, the pipeline of sampling container interface is provided with second solenoid valve and wide range differential pressure pick-up, sensor can detect malleation and negative pressure, can detect vacuum tightness, but also detection receptacle charge pressure, the pipeline of vacuum pump is provided with the 3rd solenoid valve, and the integrated circuit control system is controlled each solenoid valve, SF ₆Flow electronic controller and minipump, control panel and display screen are connected to the integrated circuit control system respectively, and wherein control panel is used to work out the time control program, finishes analysis process automatically, and display screen can display analysis state and duty parameter.

Above-mentioned solenoid valve all adopts self-pressure-sealed formula electromagnetic switch valve, pressure is high more, sealing is good more, guarantee security, air tight, box house also is provided with supply module, the integrated circuit control system of utilizing self-contained battery, but also external power supply, device realizes the intelligent automation operation, all switches, the equal programmable Timer control of flow control, and possessing condition prompting and warning function, valve all can be controlled separately, also can carry out the inner setting flow process, the flow process parameter can be imported at control panel, as valve opening, opening time, gas flow, vacuum pump unlatchings etc. can automatically perform setting process by initial button, and flow process can be edited preservation, owing to adopt comparatively ripe single-chip microcomputer control technology to realize, just do not giving unnecessary details here.

Every technical indicator is as follows:

1. weight:＜10Kg

2. vacuum tightness:＜-0.08Mpa (gauge pressure)

3. power supply mode: battery/12V direct supply

4. flow control accuracy: ± 2ml/min

Mainly contain following two functions:

1) laboratory sample acquisition function:

The laboratory sample spot sampling must guarantee that sample is not subjected to the influence of moisture content and oxygen in the outside air, system considers to adopt miniature oilless vacuum pump that sampling system is vacuumized, after the pipeline connection finishes, use earlier pipeline is vacuumized, then with pipeline after the sample wash and sampling container, again so repeatedly, guarantee that sample is not affected by environment to pipeline and sampling container.

As shown in Figure 1, idiographic flow:

1.1 connecting line is connected sampling apparatus with source of the gas 1 and sampling container 2;

1.2 system's self-evacuating vacuum, solenoid valve 3,3 ' do not open is opened solenoid valve 3 ", vacuum tightness reaches-0.08Mpa, keeps vacuum state 3-5 minute, and the check system vacuum keeps situation;

1.3 open solenoid valve 3 ', pipeline and sampling container 2 are vacuumized, kept vacuum state 3-5 minute, the vacuum of check system and sampling container keeps situation;

1.4 open SF ₆Equipment valve (source of the gas) and solenoid valve 3, inflation 5-10 closes solenoid valve 3 second then, to pipeline and container are vacuumized, 3-4 time repeatedly, cleans sampling container 2 again;

1.5 open SF ₆Equipment valve (source of the gas) and solenoid valve 3 are inflated to required pressure to sampling container;

1.6 valve-off is finished in inflation.

2) on-the-spot test sample sampling function:

The on-the-spot detection needs to use detector tube, detector tube is sealed at both ends glass tube, inside is filled with chemical indicator, during use two is opened, when the sulfur hexafluoride gas that contains specific impurities by certain flow direction detector tube of flowing through, the inner chemical indicator color of filling of detector tube can change, according to change color amount (length), determine the content of the inner specific impurities of sulfur hexafluoride gas, its sampling request is at the official hour quantity of sample detector tube of flowing through, system is at first by flow controller locking sample flow rate, then according to the switching time of quantitative requirement by the Single Chip Microcomputer (SCM) program control electromagnetic valve, arrive setting-up time when the time, then interpret sample reaches demand, and valve is closed automatically and finished sampling.

As shown in Figure 2, idiographic flow:

2.1 connecting pipeline;

2.2 open equipment valve and solenoid valve 3, set flow velocity and time, this moment, equipment gas was cut to emptying by T-valve 4;

2.3 behind the flow speed stability, start timing, device interior gas is cut to the detector tube of flowing through;

2.4 the time is to the back automatic-closing valve.

Have following advantage:

1) lightly portable, the system controlled by computer full-automatic operation;

2) douche sampling, simple and convenient;

3) vacuumizing method sampling is quick rapidly;

3) long-life oilless vacuum pump, vibration is few, and noise is low;

4) can be connected fast with convenience such as stainless steel sampling jar, sampling bag, detector tubes;

5) have the battery scene and need not power supply;

What 6) have various switches gets the gas joint, and adaptability is strong;

7) electron mass flow control guarantees the accuracy of the measurement of on-the-spot detector tube.

The utility model is not limited to above-mentioned preferred forms, and anyone can draw other various forms of products under enlightenment of the present utility model.Though but on its shape or structure, do any variation, every identical with the utility model or akin technical scheme is all within its protection domain.

Claims

1, a kind of sulfur hexafluoride sample gathering apparatus, it is characterized in that, this equipment has fast intubate and gets the gas joint, its profile is the body structure that is provided with upturning lid, be respectively equipped with control panel and display screen on the casing buckling surface relative with upturning lid, the casing periphery is provided with push-in air-path interface and power interface, and box house is provided with T-valve, SF ₆Flow electronic controller, minipump, solenoid valve and integrated circuit control system, three interfaces of T-valve are connected to gas source interface, sampling container interface and minipump by pipeline respectively, and wherein the pipeline of gas source interface is provided with first solenoid valve and SF ₆The flow electronic controller, the pipeline of sampling container interface is provided with second solenoid valve, and the pipeline of vacuum pump is provided with the 3rd solenoid valve, and the integrated circuit control system is controlled each solenoid valve, SF ₆Flow electronic controller and minipump, be used to import flow process parameter control panel and can the display analysis state and the display screen of duty parameter be connected to the integrated circuit control system.

2, sulfur hexafluoride sample gathering apparatus according to claim 1 is characterized in that, is provided with built-in supply module in the described casing.

3, sulfur hexafluoride sample gathering apparatus according to claim 1 is characterized in that, the pipeline of described sampling container interface is provided with pressure transducer.

4, sulfur hexafluoride sample gathering apparatus according to claim 3 is characterized in that, described pressure transducer adopts the wide range differential pressure pick-up.

5, sulfur hexafluoride sample gathering apparatus according to claim 1 is characterized in that, described SF ₆The flow electronic controller is formed closed loop feedback system by flow sensor and flowrate control valve.

6, sulfur hexafluoride sample gathering apparatus according to claim 1 is characterized in that, described solenoid valve adopts self-pressure-sealed formula electromagnetic switch valve.

7, sulfur hexafluoride sample gathering apparatus according to claim 1 is characterized in that, the pipeline of described gas source interface is provided with the flowmeter that is connected to the integrated circuit control system.