CN102162809B - Linear piston type sample-injection device used for monitoring gas in transformer oil on line - Google Patents
Linear piston type sample-injection device used for monitoring gas in transformer oil on line Download PDFInfo
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- CN102162809B CN102162809B CN 201110068505 CN201110068505A CN102162809B CN 102162809 B CN102162809 B CN 102162809B CN 201110068505 CN201110068505 CN 201110068505 CN 201110068505 A CN201110068505 A CN 201110068505A CN 102162809 B CN102162809 B CN 102162809B
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Abstract
The invention discloses a linear piston type sample-injection device used for monitoring gas in transformer oil on line, comprising a sample injector and a circulating air assembly, wherein the other end of the driving shaft of a motor of the sample injector is provided with a sample-injection tube; a piston is arranged in the sampling tube; the driving shaft of a stepping motor is connected with the other end of the piston; the sample-injection tube is installed on a permanent seat; a tubule on one side of the sample-injection tube is connected with an outer joint; and the orifice of the outer joint is respectively connected with a three-way joint and a cold trap by a pipeline. The linear piston type sample-injection device has the advantages of real quantitative sampling, small influence on a detection flow and the like and is simple to manufacture and install.
Description
Technical fieldThe present invention relates to a kind of Gas in Oil of Transformer on-line monitoring sampling device, belong to involved sampling device and the analytical technology application of each component component gc analysis in the micro-mixed gas.
Background technologyAt present; The Gas in Oil of Transformer on-line monitoring has been used widely in power industries such as instrument and meters; This monitoring system at first must realize effectively breaking away to the failure gas that is dissolved in the transformer oil, and the failure gas of separating is carried out stratographic analysis as appearance gas.It mainly is that the throughflow type digitizing purges sample introduction that present electric power manufacturer or analytical work person carry out the on-line chromatograph sample introduction, and critical piece is a six-way valve in the sampling device of use, and existing six-way valve is made up of spool and shell; Shell is provided with six gas ports, and its sample introduction pattern is: after at first gas is separated from the gas-oil separation unit, rely on ambient pressure from first mouthful entering six-way valve; Second mouth that warp is communicated with first mouthful gone out the entering quantity tube, gets back to gas and oil separating plant after the 3rd mouth gets into the 4th mouth that links to each other with this mouthful, treat air pressure balance after; Spool rotation 60 degree, first mouthful and the 4th mouth are connected gas and oil separating plant, isolate with detecting unit; Because of the appearance gas that remains in the quantity tube does not have power drive; Can't get in the sensor, at this moment introduce carrier gas, promote appearance gas through second mouth to quantity tube and get into from the 3rd mouth from the 5th mouth; Go out chromatographic column from the 6th mouth again, Zhongdao detecting unit is analyzed.The appearance gas that above-mentioned sample introduction pattern adopts carrier gas to purge within a certain period of time in the quantity tube is realized sample introduction; Draft in setting-up time and fully the appearance air-blowing in the quantity tube being swept totally; Because it is inevitably residual in pipeline that carrier gas purges the backflow diffusion and the gas that cause, this sample introduction is actually a kind of theoretic purging fully.In addition, because this mode causes the short time shunting that detects the loop carrier gas, also inevitably testing process is impacted.At present; Improved plane six-way valve sampling device has appearred; For example: the patent No. is " utilizing sample gas to do the gas plane six-way valve sampling device of protection gas " of 200820214579.1; Comprise valve body, be installed on the valve disc and the quantifying ring on valve body top, characteristic is that can is installed on valve body top, and can seals valve disc; Have air admission hole and venthole on the can.Also there is theoretic error in the sampling device of said structure in application, and costs an arm and a leg, and makes and install trouble.
Summary of the inventionThe object of the present invention is to provide a kind of good stability, true quantitative sample injection, little to the testing process influence, make and install simple a kind of straight line piston type sampling device that is used for the Gas in Oil of Transformer on-line monitoring.
The present invention is by injector and follow pneumatic module and constitute; Wherein injector comprises the holder, sample introduction pipe, piston of stepper motor on pedestal, the pedestal, stepper motor one side and to coupling; Said pedestal also comprises the motor cabinet of base and base one side, and said motor cabinet vertically is fixed in upper surface one side of base, and this motor cabinet is provided with the screw thread slotted eye that is connected with motor; And manhole is offered in the center of motor cabinet; Stepper motor links to each other with motor cabinet through above-mentioned screw thread slotted eye, and horizontal drive shaft one end of this motor passes the through hole on the motor cabinet, and the other end of the driving shaft of above-mentioned motor is provided with the sample introduction pipe.The main body of said sample introduction pipe is a pipe, and its front end is the mouth of pipe of frustum-like shape, and mouth of pipe place is provided with tubule; The back end periphery of said sample introduction pipe is provided with the engaging lug that has through hole; The inside of sample introduction pipe is provided with piston; For avoiding gas leakage, establish O-ring seal between piston and the sample introduction pipe, and the front end of piston head is provided with the glue head; Said glue head is close to the inwall of sample introduction pipe, and the driving shaft of above-mentioned stepper motor links to each other with the other end of piston through web member or screw thread.Said sample introduction pipe is installed on the holder, and holder is made up of sole piece, block and journal stirrup, and said sole piece is a rectangular structure; It is semicircular slotted eye that the cross section is offered in its upper surface, and the dual-side of said slotted eye links to each other with the side of sole piece, and vertical radius of slotted eye is identical with the radius of above-mentioned sample introduction pipe; The vertical affixed block of upper surface one side of said sole piece; Offer the semi-circular hole corresponding on the block, and the mouth of pipe of sample introduction pipe passes this hole, vertical affixed two relative journal stirrups with a relative side of block with the slotted eye of sole piece upper surface; Said two journal stirrups are arranged on the both sides of slotted eye; Promptly the distance between two journal stirrups is identical with the width of slotted eye, and the outside of said two journal stirrups is provided with the threaded hole corresponding with the engaging lug of sample introduction pipe, and promptly the sample introduction pipe links to each other with holder through engaging lug; Said holder is through being bolted to the upper surface of pedestal, and the driving shaft of stepper motor and sample introduction pipe coaxial cable.The tubule of said sample introduction pipe one side with coupling is linked to each other; Said coupling is made up of contiguous block and connecting pipe; One side of contiguous block is provided with the connecting pipe that communicates with it, and wherein contiguous block is connected a side of holder through bolt, and the inside of contiguous block is provided with the link slot corresponding with the tubule of sample introduction pipe; And between tubule and link slot, establish O-ring seal, be provided with pore between link slot and the connecting pipe.
Above-mentioned to coupling with follow pneumatic module and link to each other; The said pneumatic module that follows comprises three-way connection, through type electrical ball valve, cold-trap and degasser; Said three-way connection, through type electrical ball valve, cold-trap and degasser are basic identical with prior art; Above-mentioned injector links to each other with cold-trap with three-way connection respectively through pipeline to the mouth of pipe of coupling, and pipeline is provided with through type electrical ball valve A between three-way connection and the injector, and the pipeline between cold-trap and the injector is provided with through type electrical ball valve B; Two other interface of above-mentioned three-way connection is connected in the gas feed of carrier gas and gas chromatogram detecting unit, and cold-trap links to each other through pipeline with degasser.
The present invention is such work:
With the quantitative sample injection is that 1.5ML is an example, and at first through type electrical ball valve A and B are in closed condition, and after system's degassing finished, appearance gas got into cold-trap cooling removal of impurities; This moment, through type electrical ball valve A was in closed condition, and through type electrical ball valve B opens, and simultaneously, stepper motor starts; The driving shaft of stepper motor drives piston and is moved to the left, and is generally 2S, quantitative suction appearance gas 1.5ML, at this moment; Close stepper motor, general static 30S, and close through type electrical ball valve B.Open through type electrical ball valve A, startup stepper motor, driving shaft drive piston and move right, and accomplish in the general 2S, and with the whole injecting gas chromatogram of appearance gas detecting unit, at last, through type electrical ball valve A closes through three joints.The system start-up data acquisition program.
The present invention has following advantage:
1, reduces the loss of appearance gas, guarantee the precision consistance of kind gas detection volume.
2, good stability, true quantitative sample injection is little to the testing process influence.
3, can under the operation that nobody is, accomplish, reduce labour intensity, practice thrift the activity duration.
4, make and install simply, reduce production costs.
Description of drawingsFig. 1 looks diagrammatic cross-section for the master of injector of the present invention.
Fig. 2 is the three-dimensional simplified schematic diagram of pedestal of the present invention.
Fig. 3 is the three-dimensional simplified schematic diagram of holder of the present invention.
Fig. 4 is a simplified schematic diagram of following pneumatic module of the present invention.
EmbodimentAs shown in Figure 1; Pedestal 1 comprises the motor cabinet 3 of base 2 and base one side, and motor cabinet vertically is fixed in upper surface one side of base, and stepper motor 4 links to each other with motor cabinet; One end of the horizontal drive shaft 5 of motor passes motor cabinet, and the other end of driving shaft is provided with sample introduction pipe 6.The main body of sample introduction pipe is a pipe, and its front end is the mouth of pipe 7 of frustum-like shape, and mouth of pipe place is provided with tubule 8; The inside of sample introduction pipe is provided with piston 9, establishes O-ring seal 10 between piston and the sample introduction pipe, and the front end of the piston head 11 of piston is provided with glue head 12, and the glue head is close to the inwall of sample introduction pipe, and the driving shaft of stepper motor links to each other with piston through screw thread 13.The back end periphery of sample introduction pipe is provided with the engaging lug 15 that has through hole 14, and the sample introduction pipe links to each other with holder 16 through engaging lug; Holder is through being bolted to the upper surface of pedestal, and the driving shaft of stepper motor and sample introduction pipe coaxial cable.The tubule of sample introduction pipe one side with coupling 17 is linked to each other; Side to the contiguous block 18 of coupling is provided with the connecting pipe 19 that communicates with it; Contiguous block is connected a side of holder through bolt; The inside of contiguous block is provided with the link slot corresponding with the tubule of sample introduction pipe 20, and between tubule and link slot, establishes O-ring seal 21, is provided with pore 22 between link slot and the connecting pipe.
As shown in Figure 2, motor cabinet 3 vertically is fixed in upper surface one side of base 2, and this motor cabinet is provided with the screw thread slotted eye 23 that is connected with motor, and manhole 24 is offered in the center of motor cabinet.
As shown in Figure 3, sole piece 25 is a rectangular structure, and it is semicircular slotted eye 26 that the cross section is offered in its upper surface; The dual-side 27 of slotted eye links to each other with the side of sole piece, and vertical radius of slotted eye is identical with the radius of sample introduction pipe 6, the vertical affixed block 28 of upper surface one side of sole piece; Offer the semi-circular hole corresponding 29 on the block with the slotted eye of sole piece upper surface; 30, two journal stirrups of vertical affixed two relative journal stirrups with a relative side of block are arranged on the both sides of slotted eye, and promptly the distance between two journal stirrups is identical with the width of slotted eye; The outside of two journal stirrups is provided with the threaded hole corresponding with the engaging lug of sample introduction pipe 6 31, and sample introduction pipe 6 links to each other with holder through engaging lug 15.
As shown in Figure 4; Injector 32 coupling 17 is linked to each other with cold-trap 35 with three-way connection 34 respectively through pipeline 33; And pipeline is provided with through type electrical ball valve A36 between three-way connection and the injector; Pipeline between cold-trap and the injector is provided with through type electrical ball valve B37, and two other interface 38 and 39 of three-way connection is connected in the gas feed of carrier gas and gas chromatogram detecting unit, and cold-trap and degasser 40 link to each other through pipeline.
Claims (1)
1. straight line piston type sampling device that is used for the Gas in Oil of Transformer on-line monitoring; It is characterized in that: injector comprises the holder, sample introduction pipe, piston of stepper motor on pedestal, the pedestal, stepper motor one side and to coupling; Pedestal comprises the motor cabinet of base and base one side, and motor cabinet vertically is fixed in upper surface one side of base, and this motor cabinet is provided with the screw thread slotted eye that is connected with motor; And manhole is offered in the center of motor cabinet; Stepper motor links to each other with motor cabinet through above-mentioned screw thread slotted eye, and horizontal drive shaft one end of this motor passes the through hole on the motor cabinet, and the other end of the driving shaft of motor is provided with the sample introduction pipe; The main body of sample introduction pipe is a pipe, and its front end is the mouth of pipe of frustum-like shape, and mouth of pipe place is provided with tubule; The back end periphery of sample introduction pipe is provided with the engaging lug that has through hole; The inside of sample introduction pipe is provided with piston, and the front end of piston head is provided with the glue head, and the driving shaft of stepper motor links to each other with the other end of piston; The sample introduction pipe is installed on the holder, and holder is made up of sole piece, block and journal stirrup, and sole piece is a rectangular structure; It is semicircular slotted eye that the cross section is offered in its upper surface; The dual-side of slotted eye links to each other with the side of sole piece, and vertical radius of slotted eye is identical with the radius of above-mentioned sample introduction pipe, the vertical affixed block of upper surface one side of sole piece; Offer the semi-circular hole corresponding on the block with the slotted eye of sole piece upper surface; And the mouth of pipe of sample introduction pipe passes this hole, vertical affixed two relative journal stirrups with a relative side of block, and two journal stirrups are arranged on the both sides of slotted eye; Promptly the distance between two journal stirrups is identical with the width of slotted eye, and the outside of two journal stirrups is provided with the threaded hole corresponding with the engaging lug of sample introduction pipe; Holder is through being bolted to the upper surface of pedestal, and the driving shaft of stepper motor and sample introduction pipe coaxial cable; The tubule of sample introduction pipe one side with coupling is linked to each other; Coupling is made up of contiguous block and connecting pipe; One side of contiguous block is provided with the connecting pipe that communicates with it, and wherein contiguous block is connected a side of holder through bolt, and the inside of contiguous block is provided with the link slot corresponding with the tubule of sample introduction pipe; And between tubule and link slot, establish O-ring seal, be provided with pore between link slot and the connecting pipe; To coupling with follow pneumatic module and link to each other; Follow pneumatic module and comprise three-way connection, through type electrical ball valve, cold-trap and degasser; Injector links to each other with cold-trap with three-way connection respectively through pipeline to the mouth of pipe of coupling; And pipeline is provided with through type electrical ball valve A between three-way connection and the injector, and the pipeline between cold-trap and the injector is provided with through type electrical ball valve B, and cold-trap links to each other through pipeline with degasser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110068505 CN102162809B (en) | 2011-03-22 | 2011-03-22 | Linear piston type sample-injection device used for monitoring gas in transformer oil on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110068505 CN102162809B (en) | 2011-03-22 | 2011-03-22 | Linear piston type sample-injection device used for monitoring gas in transformer oil on line |
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| Publication Number | Publication Date |
|---|---|
| CN102162809A CN102162809A (en) | 2011-08-24 |
| CN102162809B true CN102162809B (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110068505 Expired - Fee Related CN102162809B (en) | 2011-03-22 | 2011-03-22 | Linear piston type sample-injection device used for monitoring gas in transformer oil on line |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102506195B (en) * | 2011-10-14 | 2013-06-19 | 天津陆海石油设备系统工程有限责任公司 | Well logging/VMS (volcanic-associated massive sulfide) gas switching valve |
| CN103759063A (en) * | 2013-12-31 | 2014-04-30 | 江苏有能电力自动化有限公司 | Planar multiple-way valve |
| CN104133026B (en) * | 2014-08-13 | 2015-10-28 | 国家电网公司 | The oil product pre-treatment degas method of transformer insulated oil gas chromatographic |
| CN104458350A (en) * | 2014-12-18 | 2015-03-25 | 天津理工大学 | Gas capture concentration device and working method thereof for improving gas measurement sensitivity |
| CN105954064B (en) * | 2016-07-20 | 2019-01-18 | 国网山东省电力公司烟台市福山区供电公司 | Run electrician's fluid water trace analysis acquisition method and dedicated unit in electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1158421A (en) * | 1996-02-28 | 1997-09-03 | 沈阳电业局 | On-line analyser for dissolved gas color spectrum in transformer oil |
| CN100383512C (en) * | 2004-07-14 | 2008-04-23 | 中国科学院大连化学物理研究所 | Dissolved gas sampling apparatus and method used in transformer oil gas-chromatography on-line analysis |
| CN1967241A (en) * | 2006-11-20 | 2007-05-23 | 河南省中分仪器有限公司 | A multifunctional gas chromatographic device gas circuit flow |
| CN202013343U (en) * | 2011-03-22 | 2011-10-19 | 大连世有电力科技有限公司 | Straight line piston type sample injection device for on-line monitoring of gas in transformer oil |
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Granted publication date: 20121219 Termination date: 20130322 |