CN201859135U - Helium concentration instrument - Google Patents
Helium concentration instrument Download PDFInfo
- Publication number
- CN201859135U CN201859135U CN2010202896143U CN201020289614U CN201859135U CN 201859135 U CN201859135 U CN 201859135U CN 2010202896143 U CN2010202896143 U CN 2010202896143U CN 201020289614 U CN201020289614 U CN 201020289614U CN 201859135 U CN201859135 U CN 201859135U
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- CN
- China
- Prior art keywords
- housing
- sensor
- shell
- sleeve pipe
- casing pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a helium concentration instrument, which solves the problems of low measurement accuracy, low maintenance cost and non-visualized display of the traditional helium concentration instrument. A to-be-detected gas source (13) outside a shell (1) is connected with a gas inlet (6) of a first casing pipe in a housing of a sensor (2) in the shell (1) through a first pipeline; a second casing pipe is arranged in the housing of the sensor; the first casing pipe and the second casing pipe in the housing of the sensor (2) are seal pipes; a first resistance wire and a second resistance wire are respectively arranged in the first casing pipe and the second casing pipe; the first casing pipe is provided with an exhaust opening (7) which is connected with the exhaust opening of the shell (1) through a second pipeline; wirings of both ends of the first resistance wire and the second resistance wire come out from a joint (15) on the housing of the sensor after passing through the respective casing pipes to from an electrical bridge with resistors R5 and R7 in the shell (1); the output of the electrical bridge is connected with an amplification unit (8); and the amplification unit (8) is connected with a control display unit (14) outside the shell (1).
Description
Technical field:
The utility model is relevant with the device of detection concentrations of helium in the helium leak test system.
Background technology:
Existing Helium concentrator measuring accuracy is not high, poor stability, and the maintenance cost height shows that reading is not directly perceived, can not send alerting signal.
The utility model content:
The purpose of this utility model provides a kind of easy to use, good stability, and the degree of accuracy height need not be safeguarded, the reading intuitive display has the Helium concentrator of warning function.
The utility model is achieved in that
The utility model Helium concentrator, the air intake opening 6 of the 1st sleeve pipe in sensor 2 shells of the outer tested source of the gas 13 of housing 1 in first pipeline and housing 1 is connected, the 2nd sleeve pipe is arranged in the sensor outer housing, in sensor 2 shells the 1st, 2 sleeve pipes are sealed tube, the 1st, have the 1st respectively in 2 sleeve pipes, 2 resistance wires, the 1st sleeve pipe has the exhausr port of exhausr port 7 through the second pipeline body contact body 1, the 1st, the sleeve pipe that place is separately passed in two terminated lines of 2 resistance wires from the joint 15 on the sensor outer housing come out with housing 1 in resistance R 5, R7 forms electric bridge, and electric bridge output connects amplifying unit 8, the control display unit 14 outside the amplifying unit 8 body contact bodies 1.
Tested gas is the pressure maintaining valve in housing 1 12 successively, and filtrator 11, current limliting unit 10 and flowmeter 9 are connected with the air intake opening 6 of the 1st sleeve pipe, and current limliting unit 10 is the stainless-steel tube of 0.1mm for diameter.
The utility model is simple in structure, and is easy to use, and the control display unit is connected with input keyboard with display screen, can set alarming value, intuitive display, and exportable alerting signal.
The utility model has following advantage:
1. adopt VFD display density value, reading is directly perceived, clear.
2. sensor need not be safeguarded, has stability preferably.
3. instrument is provided with warning device, if concentration is lower than setting concentration, then prompting and output switching value signal can appear in display screen.
4. when measuring, instrument concentration shows rapidly, good reproducibility, and degree of accuracy is higher.
5. helium is inert gas, and instrument is safe and reliable in use.
Description of drawings:
Fig. 1 is a process flow diagram of the present utility model
Fig. 2 is the sensor synoptic diagram
Fig. 3 is the electrical principle block diagram
Fig. 4 is circuit theory diagrams
Embodiment:
One, principle of work of the present utility model
Has different thermal conductivities according to different gas, after resistance wire 4 fed the helium of variable concentrations, thermal conductivity changed, and causes the resistance of resistance wire 4 to change, cause that bridge circuit voltage changes, this voltage is amplified the concentration that tested helium just can be determined in the back.
Two, formation of the present utility model
The utility model is become with the gas circuit set of systems by measuring system.
1. the pressure of the tested source of the gas 13 of air-channel system should be greater than 0.25Mpa.Tested gas is regulated pressure by pressure maintaining valve 12 after current limiting element 10 current limlitings, make flow arrive designated value, the flow of flowmeter 9 indication gases.Filtrator 11 filters out the impurity in the gas, and current limiting element 10 adopts the stainless-steel tube of internal diameter at 0.1mm, comes prior current limliting by increasing gas-flow resistance.
2. electrical principle of the present utility model is as follows:
Of the present utility model electricly be made up of three parts: amplifying unit, control display unit, power supply (1) helium input are amplified
(2) control display unit
The A/D that the helium signal of X9C102 digital regulation resistance output is sent into single-chip microcomputer PIC16F877 holds 2 pin, carries out the A/D conversion, is shown to the VFD display screen by 33～40 pin output binary-coded decimal.Input keyboard is by SW1～SW6, R
21～R
26Form, the setting of a few group alarm values is provided, when the helium signal of input was below or above setting value, PIC16F877 was with regard to output low level or high level, relay K
1～3Adhesive or disconnection output switching value signal, T
2～T
4Be optocoupler, cut off the interference of external circuitry.
(3) power supply
Power unit mainly is made of Switching Power Supply, electric capacity.The 220V power supply is exported stable direct current 5V, 9V and is used for amplifying unit, control display unit after Switching Power Supply.
Technical parameter is as follows:
Measurement range: 0～99%He
Degree of accuracy: ± 3% (during 70% above concentration, all the other≤± 5%)
Reaction time:＜2 minutes
Sample airshed: 200ml/min, ± 5ml
Working environment: 0～40 ℃
Power supply: AC 220V 50Hz.
Claims (3)
1. Helium concentrator, the air intake opening (6) that it is characterized in that the 1st sleeve pipe in sensor (2) shell of the outer tested source of the gas (13) of housing (1) in first pipeline and housing (1) is connected, the 2nd sleeve pipe is arranged in the sensor outer housing, in sensor (2) shell the 1st, 2 sleeve pipes are sealed tube, the 1st, have the 1st respectively in 2 sleeve pipes, 2 resistance wires, the 1st sleeve pipe has the exhausr port of exhausr port (7) through the second pipeline body contact body (1), the 1st, two terminated lines of 2 resistance wires are passed separately, and the sleeve pipe at place comes out and the interior resistance R 5 of housing (1) from the joint (15) on the sensor outer housing, R7 forms electric bridge, electric bridge output connects amplifying unit (8), the control display unit (14) that amplifying unit (8) body contact body (1) is outer.
2. Helium concentrator according to claim 1, it is characterized in that the tested gas pressure maintaining valve (12) in housing (1) successively, filtrator (11), current limliting unit (10) and flowmeter (9) are connected with the air intake opening (6) of the 1st sleeve pipe, and current limliting unit (10) are the stainless-steel tube of 0.1mm for diameter.
3. Helium concentrator according to claim 1, it is characterized in that controlling display unit (14) has single-chip microcomputer to be connected with display screen, input keyboard and relay, and relay output is connected with Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202896143U CN201859135U (en) | 2010-08-12 | 2010-08-12 | Helium concentration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202896143U CN201859135U (en) | 2010-08-12 | 2010-08-12 | Helium concentration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859135U true CN201859135U (en) | 2011-06-08 |
Family
ID=44104939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202896143U Expired - Lifetime CN201859135U (en) | 2010-08-12 | 2010-08-12 | Helium concentration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201859135U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405006A (en) * | 2016-08-31 | 2017-02-15 | 天津立中车轮有限公司 | Mutual inspection device for double helium concentration meters |
-
2010
- 2010-08-12 CN CN2010202896143U patent/CN201859135U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405006A (en) * | 2016-08-31 | 2017-02-15 | 天津立中车轮有限公司 | Mutual inspection device for double helium concentration meters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |
|
| CX01 | Expiry of patent term |