CN109444226A - A kind of heat-conducted SF6 purity detecting instrument conditioning circuit - Google Patents
A kind of heat-conducted SF6 purity detecting instrument conditioning circuit Download PDFInfo
- Publication number
- CN109444226A CN109444226A CN201811335080.0A CN201811335080A CN109444226A CN 109444226 A CN109444226 A CN 109444226A CN 201811335080 A CN201811335080 A CN 201811335080A CN 109444226 A CN109444226 A CN 109444226A
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- circuit
- conductance cell
- filter
- sensing chamber
- resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
- G01N27/185—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested using a catharometer
Abstract
The invention discloses a kind of heat-conducted SF6 purity detecting instrument conditioning circuits, including conductance cell, air inlet pipe, escape pipe, filter, caching room, sensing chamber, sealed insulation set, connection line, fixed value resistance, thermistor, conditioning circuit, permanent ource electric current circuit, bleeder circuit, electric signal input circuit, filter circuit, conductance cell circuit, amplifying circuit and electrical signal output circuitry.The beneficial effects of the present invention are: thermistor is made of platinum filament or tungsten wire; sensitivity with higher; filter is made of sintered powder material; the impurity such as steam, particle in measurement gas can be effective filtered out; air inlet pipe is connected to caching room; and escape pipe is connected to sensing chamber; it avoids gas from entering directly into detection interior to cause stress or the variation of flow velocity; the resistance value of fixed value resistance is 250 ohm; and fixed value resistance is in be connected in parallel with thermistor; the electric current of conductance cell circuit can be stablized, and played a protective role to conductance cell circuit.
Description
Technical field
The present invention relates to a kind of thrustor, specially a kind of heat-conducted SF6 purity detecting instrument conditioning circuit belongs to detection
Engineering device technique field.
Background technique
SF6 is a kind of colourless, odorless, nontoxic, non-ignitable inert gas, with good insulation arc extinction performance, extensively
Applied in high voltage electric equipment, the safe operation of electric system is significant, and development and the people for being related to national economy are raw
Stabilization living, requirement of the people to power system power supply reliability is also higher and higher, if the leakage of SF6 gas causes density to decline
Or gas micro water content is exceeded, will making equipment, there are hidden danger to even result in accident, it is therefore desirable to carry out to the purity of SF6
Periodic detection.
Detection is carried out to the purity of SF6 to need using heat-conducted SF6 purity detecting instrument, and existing SF6 purity is examined
Instrument is surveyed, one, used thermistor sensitivity are poor, and lesser temperature change its resistance value will not be generated and be convenient for, led
Cause the sensitivity of detector poor, secondly, can be with the impurity such as steam, particle, and when detecting into the gas in detector
But not can be carried out separation, influence testing result, thirdly, when gas be passed into detection it is indoor when, can be to causing to press in sensing chamber (6)
The variation of power or flow velocity also will affect the accuracy of testing result.
Summary of the invention
The object of the invention is that providing a kind of heat-conducted SF6 purity detecting instrument conditioning electricity to solve the above-mentioned problems
Road.
The present invention through the following technical solutions to achieve the above objectives: a kind of heat-conducted SF6 purity detecting instrument conditioning circuit,
Including conductance cell, air inlet pipe, escape pipe, filter, caching room, sensing chamber, sealed insulation set, connection line, fixed value resistance, heat
Quick resistance, conditioning circuit, permanent ource electric current circuit, bleeder circuit, electric signal input circuit, filter circuit, conductance cell circuit, amplification
Circuit and electrical signal output circuitry；Air inlet pipe and an air outlet pipe is connected on the conductance cell, there is horizontal setting in the conductance cell
Filter, and the conductance cell is divided into caching two parts in room and sensing chamber by filter, and caching room setting is being examined
It surveys below room, the sealed insulation set is separately positioned on the same side of conductance cell side wall, and one end of the connection line passes through close
Envelope insulation sleeve is placed in detection interior, and the fixed value resistance is connected in the connection line on the outside of sensing chamber, the temperature-sensitive
Resistance is connected to the connecting line terminal on the inside of sensing chamber, and the outside of conductance cell, and the tune is arranged in the conditioning circuit
Reason circuit is attached by connection line and conductance cell, and the conditioning circuit includes permanent ource electric current circuit, bleeder circuit, telecommunications
Number input circuit, filter circuit, conductance cell circuit, amplifying circuit and electrical signal output circuitry, the perseverance ource electric current circuit with point
Volt circuit electrically connects, and the electric signal input circuit is arranged between bleeder circuit and filter circuit, and the electric signal
Input circuit is electrically connect with bleeder circuit and filter circuit, and the conductance cell circuit electrically connect with filter circuit
It connects, the amplifying circuit is arranged between conductance cell circuit and electrical signal output circuitry, and the amplifying circuit and conductance cell electricity
It is electrically connected between road and electrical signal output circuitry.
Preferably, in order to enable thermistor sensitivity with higher, the thermistor uses platinum filament or tungsten wire
It is made, and the resistance value of thermistor is 50 ohm -500 ohm.
Preferably, it is provided with two layers to effective filter out impurity, the filter such as steam, particle in measurement gas,
And filter is made of sintered powder material.
Preferably, it is caused stress or the variation of flow velocity in order to avoid gas enters directly into detection interior, the air inlet pipe
It is connected to caching room, and escape pipe is connected to sensing chamber.
Preferably, in order to play a protective role to conductance cell circuit, the resistance value of the fixed value resistance is 250 ohm, and fixed
Value resistance is in be connected in parallel with thermistor.
The beneficial effects of the present invention are: the heat-conducted SF6 purity detecting instrument conditioning circuit design is rationally, thermistor is used
Platinum filament or tungsten wire are made, and the resistance value of thermistor is 50 ohm -500 ohm, can be with higher according to the variation of temperature
Sensitivity, and then realize the detection to SF purity, filter is provided with two layers, and filter is made of sintered powder material,
The impurity such as steam, particle in measurement gas can be effective filtered out, influence of the factor to measurement, air inlet pipe and caching are reduced
Room is connected to, and escape pipe is connected to sensing chamber, is stored in the gas entered in conductance cell by air inlet pipe first
Caching is indoor, then enters back into sensing chamber and is discharged, and avoids gas from entering directly into detection interior and causes stress or flow velocity
Variation, and cause testing result there are error, the resistance value of fixed value resistance is 250 ohm, and fixed value resistance and thermistor are in simultaneously
Connection connection, can stablize the electric current of conductance cell circuit, and play a protective role to conductance cell circuit.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is conditioning circuit structural schematic diagram of the present invention.
In figure: 1, conductance cell, 2, air inlet pipe, 3, escape pipe, 4, filter, 5, caching room, 6, sensing chamber, 7, sealed insulation
Set, 8, connection line, 9, fixed value resistance, 10, thermistor, 11, conditioning circuit, 12, permanent ource electric current circuit, 13, bleeder circuit,
14, electric signal input circuit, 15, filter circuit, 16, conductance cell circuit, 17, amplifying circuit and 18, electrical signal output circuitry.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1 ~ 2, a kind of heat-conducted SF6 purity detecting instrument conditioning circuit, including conductance cell 1, air inlet pipe 2, outlet
Pipe 3, filter 4, caching room 5, sensing chamber 6, sealed insulation set 7, connection line 8, fixed value resistance 9, thermistor 10, conditioning electricity
Road 11, permanent ource electric current circuit 12, bleeder circuit 13, electric signal input circuit 14, filter circuit 15, conductance cell circuit 16, amplification
Circuit 17 and electrical signal output circuitry 18；Air inlet pipe 2 and escape pipe 3, water in the conductance cell 1 are connected on the conductance cell 1
Safety is equipped with filter 4, and the conductance cell 1 is divided to cache 6 two parts in room 5 and sensing chamber by filter 4, and described slow
It deposits room 5 to be arranged below sensing chamber 6, the sealed insulation set 7 is separately positioned on the same side of 1 side wall of conductance cell, the connection
One end of route 8 passes through sealed insulation set 7 and is placed in sensing chamber 6, and the fixed value resistance 9 is connected to positioned at 6 outside of sensing chamber
Connection line 8 on, the thermistor 10 is connected to 8 end of connection line positioned at the inside of sensing chamber 6, the conditioning circuit 11
The outside of conductance cell 1 is set, and the conditioning circuit 11 is attached by connection line 8 with conductance cell 1, the conditioning electricity
Road 11 includes permanent ource electric current circuit 12, bleeder circuit 13, electric signal input circuit 14, filter circuit 15, conductance cell circuit 16, puts
Big circuit 17 and electrical signal output circuitry 18, the perseverance ource electric current circuit 12 are electrically connect with bleeder circuit 13, the telecommunications
Number input circuit 14 is arranged between bleeder circuit 13 and filter circuit 15, and the electric signal input circuit 14 and bleeder circuit
13 and filter circuit 15 electrically connect, the conductance cell circuit 16 is electrically connected with filter circuit 15, the amplification
Circuit 17 is arranged between conductance cell circuit 16 and electrical signal output circuitry 18, and the amplifying circuit 17 and conductance cell circuit 16
It is electrically connected between electrical signal output circuitry 18.
The thermistor 10 is made of platinum filament or tungsten wire, and the resistance value of thermistor 10 is 50 ohm -500 ohm,
According to the variation of temperature can sensitivity with higher, and then realize detection to SF6 purity, the filter 4 is provided with
Two layers, and filter 4 is made of sintered powder material, can be effective filtered out the impurity such as steam, particle in measurement gas, be subtracted
Influence of the factor to measurement is lacked, the air inlet pipe 2 is connected to caching room 5, and escape pipe 3 is connected with sensing chamber 6
It is logical, it is stored in the gas entered in conductance cell 1 by air inlet pipe 2 first in caching room 5, then enters back into sensing chamber 6 simultaneously
Discharge avoids gas from entering directly into and causes stress in sensing chamber 6 or the variation of flow velocity, and causes testing result there are error,
The resistance value of the fixed value resistance 9 is 250 ohm, and fixed value resistance 9 is in be connected in parallel with thermistor 10, can stablize conductance cell
The electric current of circuit 16, and play a protective role to conductance cell circuit 16.
Working principle: when using the heat-conducted SF6 purity detecting instrument conditioning circuit, under test gas is passed through into air inlet pipe 2
It enters in conductance cell 1, and is first stored in caching room 5, avoid gas from entering directly into and caused stress in sensing chamber 6 or flow velocity
Variation, and lead to testing result there are error, then entered in sensing chamber 6 and detected by filter 4, can be effectively
The impurity such as steam, particle in measurement gas are filtered out, influence of the factor to measurement is reduced, preferably connect permanent ource electric current circuit
12, because of the variation of ambient temperature, its resistance value is accordingly changed the thermistor 10 in sensing chamber 6, and the variation of electric signal is by putting
Big circuit 17 is exported after amplifying by electrical signal output circuitry 18.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of heat-conducted SF6 purity detecting instrument conditioning circuit, it is characterised in that: including conductance cell (1), air inlet pipe (2), outlet
Manage (3), filter (4), caching room (5), sensing chamber (6), sealed insulation set (7), connection line (8), fixed value resistance (9), heat
Quick resistance (10), conditioning circuit (11), permanent ource electric current circuit (12), bleeder circuit (13), electric signal input circuit (14), filtering
Circuit (15), conductance cell circuit (16), amplifying circuit (17) and electrical signal output circuitry (18)；It is connected on the conductance cell (1)
There are air inlet pipe (2) and escape pipe (3), the interior horizontal setting of the conductance cell (1) has filter (4), and the conductance cell (1) passes through
Filter (4) is divided into caching room (5) and (6) two parts of sensing chamber, and the caching room (5) is arranged below sensing chamber (6),
The sealed insulation set (7) is separately positioned on the same side of conductance cell (1) side wall, and one end of the connection line (8) passes through close
Envelope insulation sleeve (7) is placed in sensing chamber (6), and the fixed value resistance (9) is connected to the connection line on the outside of sensing chamber (6)
(8) on, the thermistor (10) is connected to the end of the connection line (8) on the inside of sensing chamber (6), the conditioning circuit (11)
Outside in conductance cell (1) is set, and the conditioning circuit (11) is attached by connection line (8) with conductance cell (1), institute
Stating conditioning circuit (11) includes permanent ource electric current circuit (12), bleeder circuit (13), electric signal input circuit (14), filter circuit
(15), conductance cell circuit (16), amplifying circuit (17) and electrical signal output circuitry (18), it is described perseverance ource electric current circuit (12) with point
Volt circuit (13) electrically connects, the electric signal input circuit (14) setting bleeder circuit (13) and filter circuit (15) it
Between, and the electric signal input circuit (14) is electrically connect with bleeder circuit (13) and filter circuit (15), the thermal conductivity
Pond circuit (16) is electrically connected with filter circuit (15), and the amplifying circuit (17) is arranged in conductance cell circuit (16) and electricity
Between signal output apparatus (18), and the amplifying circuit (17) and conductance cell circuit (16) and electrical signal output circuitry (18) it
Between electrically connect.
2. a kind of heat-conducted SF6 purity detecting instrument conditioning circuit according to claim 1, it is characterised in that: the temperature-sensitive
Resistance (10) is made of platinum filament or tungsten wire, and the resistance value of thermistor (10) is 50 ohm -500 ohm.
3. a kind of heat-conducted SF6 purity detecting instrument conditioning circuit according to claim 1, it is characterised in that: the filtering
Piece (4) is provided with two layers, and filter (4) is made of sintered powder material.
4. a kind of heat-conducted SF6 purity detecting instrument conditioning circuit according to claim 1, it is characterised in that: the air inlet
Pipe (2) is connected to caching room (5), and escape pipe (3) is connected to sensing chamber (6).
5. a kind of heat-conducted SF6 purity detecting instrument conditioning circuit according to claim 1, it is characterised in that: the definite value
The resistance value of resistance (9) is 250 ohm, and fixed value resistance (9) is in be connected in parallel with thermistor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811335080.0A CN109444226B (en) | 2018-11-10 | 2018-11-10 | Thermal conductance formula SF6 purity detector conditioning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811335080.0A CN109444226B (en) | 2018-11-10 | 2018-11-10 | Thermal conductance formula SF6 purity detector conditioning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109444226A true CN109444226A (en) | 2019-03-08 |
| CN109444226B CN109444226B (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811335080.0A Active CN109444226B (en) | 2018-11-10 | 2018-11-10 | Thermal conductance formula SF6 purity detector conditioning circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109444226B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042983A (en) * | 2001-08-03 | 2003-02-13 | Shimadzu Corp | Thermal conductivity detector |
| CN1675522A (en) * | 2002-07-19 | 2005-09-28 | 迅捷集团公司 | Variable resistance sensor with common reference leg |
| CN201488969U (en) * | 2009-10-09 | 2010-05-26 | 丁五行 | Thermostatic adiabatic system for heat-conducted gas detection |
| CN203705397U (en) * | 2013-12-25 | 2014-07-09 | 福建优迪电力技术有限公司 | High precision SF6 purity analysis meter |
| CN207096185U (en) * | 2017-08-08 | 2018-03-13 | 黑龙江省劳动安全科学技术研究中心 | Sulfur hexafluoride detector |
-
2018
- 2018-11-10 CN CN201811335080.0A patent/CN109444226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042983A (en) * | 2001-08-03 | 2003-02-13 | Shimadzu Corp | Thermal conductivity detector |
| CN1675522A (en) * | 2002-07-19 | 2005-09-28 | 迅捷集团公司 | Variable resistance sensor with common reference leg |
| CN201488969U (en) * | 2009-10-09 | 2010-05-26 | 丁五行 | Thermostatic adiabatic system for heat-conducted gas detection |
| CN203705397U (en) * | 2013-12-25 | 2014-07-09 | 福建优迪电力技术有限公司 | High precision SF6 purity analysis meter |
| CN207096185U (en) * | 2017-08-08 | 2018-03-13 | 黑龙江省劳动安全科学技术研究中心 | Sulfur hexafluoride detector |
Non-Patent Citations (1)
| Title |
|---|
| 刘殿素等: "新型气体热导传感器及其应用设计", 《仪表技术与传感器》 * |
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| Publication number | Publication date |
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| CN109444226B (en) | 2021-03-26 |
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