CN206399918U - The protection structure of thermal conductivity cell detector - Google Patents
The protection structure of thermal conductivity cell detector Download PDFInfo
- Publication number
- CN206399918U CN206399918U CN201621262870.7U CN201621262870U CN206399918U CN 206399918 U CN206399918 U CN 206399918U CN 201621262870 U CN201621262870 U CN 201621262870U CN 206399918 U CN206399918 U CN 206399918U
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- China
- Prior art keywords
- thermal conductivity
- conductivity cell
- cell detector
- carrier gas
- temperature
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- 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.)
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Abstract
According to one side of the present utility model there is provided a kind of protection structure of thermal conductivity cell detector, including：It is connected to the heater of thermal conductivity cell detector；It is connected to the temperature-detecting device of thermal conductivity cell detector；It is connected to the carrier gas flux detection means of thermal conductivity cell detector；The first protection device of temperature-detecting device and heater is connected to, when the temperature that temperature-detecting device is detected exceeds predetermined temperature threshold, the first protection device makes heater stop heat thermal conductivity cell detector；With the second protection device of the sensor being connected in carrier gas flux detection means and thermal conductivity cell detector; when thermal conductivity cell detector is less than or equal to first flow threshold value in the carrier gas flux that heated condition and carrier gas flux detection means are detected, the second protection device closes the bridge stream of the sensor.Protection structure of the present utility model can effectively protect thermal conductivity cell detector, so as to greatly increase the service life of thermal conductivity cell detector.
Description
Technical field
The utility model is related to thermal conductivity cell detector (TCD), more particularly to a kind of protection structure of thermal conductivity cell detector.
Background technology
Thermal conductivity cell detector (TCD) is widely used detector in gas chromatograph, especially in gas analysis
In should be with the most use.However, during the use of thermal conductivity cell detector, can be right due to the operation or improper use of user
Thermal conductivity cell detector adversely affects (for example, damage), so as to cause the exception of analysis result.
Have much to the factor that thermal conductivity cell detector is adversely affected.Generally, for example, there is the biography in thermal conductivity cell detector
The tungsten-rhenium wire oxidation of sensor, the bridge electric current of sensor set unreasonable, carrier gas purity is inadequate, conductance cell temperature setting is unreasonable etc.
Factor.But, the most of factor adversely affected to thermal conductivity cell detector be all as caused by the improper use of user,
Particularly user is caused by the improper use in terms of carrier gas.
Fig. 1 shows the structural representation of the protection structure 100 of existing thermal conductivity cell detector.As shown in figure 1, existing
The protection structure 100 of thermal conductivity cell detector 110 includes temperature-detecting device 120, protection device 130 and heater 140.Temperature
Detection means 120 is connected to the temperature in thermal conductivity cell detector 110, detection thermal conductivity cell detector 110.Heater 140 is connected
To thermal conductivity cell detector 110, thermal conductivity cell detector 110 is heated.Protection device 130 is connected to temperature-detecting device 120
With heater 140.When the temperature in the thermal conductivity cell detector 110 that temperature-detecting device 120 is detected exceeds predetermined temperature threshold
During value, protection device 130 makes heater 140 stop heating thermal conductivity cell detector 110.
Although the protection structure 100 of existing thermal conductivity cell detector as shown in Figure 1 can be played to thermal conductivity cell detector
Certain protective effect, still, this protection is inadequate, it is impossible to avoid the improper use because user, especially because with
Improper use of the family in terms of carrier gas, and the adverse effect caused to thermal conductivity cell detector.
Utility model content
In view of the above problems, the utility model provides a kind of protection structure of thermal conductivity cell detector.It is of the present utility model
The protection structure of thermal conductivity cell detector adds a new protection device, to enter one on the basis of existing protection device
Step realizes the protection to thermal conductivity cell detector, so that the improper use because user is significantly reduced, especially because user
Improper use in terms of carrier gas, and the adverse effect caused to thermal conductivity cell detector.
According to one side of the present utility model there is provided a kind of protection structure of thermal conductivity cell detector, including：
Heater, the heater is connected to the thermal conductivity cell detector, and the thermal conductivity cell detector is added
Heat；
Temperature-detecting device, the temperature-detecting device is connected to the thermal conductivity cell detector, detects the conductance cell inspection
The temperature surveyed in device；
Carrier gas flux detection means, the carrier gas flux detection means is connected to the thermal conductivity cell detector, detection input
Carrier gas flux of the carrier gas in the thermal conductivity cell detector；
First protection device, first protection device is connected to the temperature-detecting device and the heater, and
And when the temperature that the temperature-detecting device is detected exceeds predetermined temperature threshold, first protection device makes described
Heater stop is heated to the thermal conductivity cell detector；With
Second protection device, second protection device is connected to the carrier gas flux detection means and conductance cell inspection
The sensor surveyed in device, and when the thermal conductivity cell detector is in heated condition and carrier gas flux detection means detection
When the carrier gas flux arrived is less than first flow threshold value, second protection device closes the bridge stream of the sensor.
In the utility model, second protection device further comprises timer and is connected further to described add
Thermal；
When the thermal conductivity cell detector is in the load that starting state and the carrier gas flux detection means are detected
When throughput reaches second flow threshold value, the timer starts timing, and reaches the scheduled time in the timer
After section, second protection device makes the heater heat the thermal conductivity cell detector and makes the sensing
The bridge conductance of device leads to.
It is interior during the timing of the timer in the utility model, when the carrier gas flux detection means is detected
Carrier gas flux when being less than the second flow threshold value, the timer stops timing.
In the utility model, the first flow threshold value is more than or equal to the second flow threshold value.
By using the protection structure of thermal conductivity cell detector of the present utility model, due on the basis of existing protection device
On add a new protection device, therefore add the fault-tolerant ability of thermal conductivity cell detector in use, can be true
Protect thermal conductivity cell detector and realize heating function under secure conditions, and significantly reduce the improper use because user,
Especially because improper use of the user in terms of carrier gas, and the adverse effect caused to thermal conductivity cell detector, so that greatly
The service life of thermal conductivity cell detector is improved, and has provided the user the analysis environments of high-quality.
Brief description of the drawings
Fig. 1 shows the schematic diagram of the protection structure of existing thermal conductivity cell detector；
Fig. 2 shows the schematic diagram of the protection structure of the thermal conductivity cell detector according to first embodiment of the present utility model；
Fig. 3 shows the schematic diagram of the protection structure of the thermal conductivity cell detector according to second embodiment of the present utility model.
Embodiment
Hereinafter with reference to accompanying drawing description according to embodiment of the present utility model.
First embodiment
Fig. 2 shows the signal of the protection structure 200 according to the thermal conductivity cell detector of first embodiment of the present utility model
Figure.
As shown in Fig. 2 the protection structure 200 of thermal conductivity cell detector 210 includes heater 240, temperature-detecting device
220th, carrier gas flux detection means 250, the first protection device 230 and the second protection device 260.Thermal conductivity cell detector 210 enters one
Step includes sensor 211.
Heater 240 is connected to thermal conductivity cell detector 210, and thermal conductivity cell detector 210 is heated.
Temperature-detecting device 220 is connected to the temperature in thermal conductivity cell detector 210, detection thermal conductivity cell detector 210.
Carrier gas flux detection means 250 is connected to thermal conductivity cell detector 210, detects from outside input to thermal conductivity cell detector
Carrier gas flux of the carrier gas in thermal conductivity cell detector 210 in 210.
First protection device 230 is connected to temperature-detecting device 220 and heater 240.When temperature-detecting device 220 is examined
When the temperature measured exceeds predetermined temperature threshold, the first protection device 230 makes heater 240 stop to thermal conductivity cell detector
210 are heated.
Second protection device 260 is connected to the sensor in carrier gas flux detection means 250 and thermal conductivity cell detector 210
211.When thermal conductivity cell detector 210 is less than in the carrier gas flux that heated condition and carrier gas flux detection means 250 are detected
During first flow threshold value, the second protection device 260 closes the bridge stream of the sensor 211 in thermal conductivity cell detector 210.
First flow threshold value can be set as needed.For example, first flow threshold value can be set to 5 ml/mins
Clock, 10 ml/mins etc..
Second embodiment
Fig. 3 shows the signal of the protection structure 300 according to the thermal conductivity cell detector of second embodiment of the present utility model
Figure.
As shown in figure 3, the protection structure 300 of thermal conductivity cell detector 310 includes heater 340, temperature-detecting device
320th, carrier gas flux detection means 350, the first protection device 330 and the second protection device 360.Thermal conductivity cell detector 310 enters one
Step includes sensor 311.Second protection device 360 further includes timer 361.
Heater 340 is connected to thermal conductivity cell detector 310, and thermal conductivity cell detector 310 is heated.
Temperature-detecting device 320 is connected to the temperature in thermal conductivity cell detector 310, detection thermal conductivity cell detector 310.
Carrier gas flux detection means 350 is connected to thermal conductivity cell detector 310, detects from outside input to thermal conductivity cell detector
Carrier gas flux of the carrier gas in thermal conductivity cell detector 210 in 210.
First protection device 330 is connected to temperature-detecting device 320 and heater 340.When temperature-detecting device 320 is examined
When the temperature measured exceeds predetermined temperature threshold, the first protection device 330 makes heater 340 stop to thermal conductivity cell detector
210 are heated.
Second protection device 360 is connected to carrier gas flux detection means 350, heater 340 and thermal conductivity cell detector 310
In sensor 311.
When thermal conductivity cell detector 310 is in the carrier gas flux that heated condition and carrier gas flux detection means 350 are detected
During less than first flow threshold value, the second protection device 360 closes the bridge stream of the sensor 311 in thermal conductivity cell detector 310.
When thermal conductivity cell detector 310 is in the carrier gas flux that starting state and carrier gas flux detection means 350 are detected
When reaching second flow threshold value, the timer 361 in the second protection device 360 starts timing, and is reached in the timing of timer 361
To after predetermined amount of time, the second protection device 360 makes heater 340 heat and make thermal conductivity cell detector 310
The bridge conductance of sensor 311 in thermal conductivity cell detector 310 leads to.
When thermal conductivity cell detector 310 it is long-term without using after, some can be more or less assembled in thermal conductivity cell detector 310 empty
Gas.Deposit in case of air, if directly initiating thermal conductivity cell detector 310, i.e., conductance cell is examined in thermal conductivity cell detector 310
Survey device 310 to be heated, and bridge stream is applied to the tungsten-rhenium wire of the sensor 311 in thermal conductivity cell detector 310, then because heat
The tungsten-rhenium wire of sensor 311 in pool detector 310 is led after the oxygen in touching air, it may occur that oxidation is even burnt
It is disconnected, so thermal conductivity cell detector 310 can be caused to be damaged because of improper use.
In order to avoid causing thermal conductivity cell detector 310 to be damaged in startup stage, added to thermal conductivity cell detector 310
Heat and the tungsten-rhenium wire of the sensor 311 in thermal conductivity cell detector 310 is applied before bridge stream, it is necessary in thermal conductivity cell detector
Enough carrier gas are inputted in 310, thermal conductivity cell detector 310 is caused with eliminating the air remained in thermal conductivity cell detector 310
Adverse effect.
In the present embodiment, timer is provided with the second protection device 360.When carrier gas flux detection means 350 is examined
When the carrier gas flux for measuring the carrier gas being input in thermal conductivity cell detector 310 reaches second flow threshold value, the second protection device 360
In timer 361 start timing, and after the timing of timer 361 reaches predetermined amount of time, the second protection device 360 makes
Heater 340 is heated to thermal conductivity cell detector 310 and makes the bridge stream of the sensor 311 in thermal conductivity cell detector 310
Conducting.
Predetermined amount of time can be set as needed.It is preferred that predetermined amount of time is generally set at more than 15 minutes.
During the timing of timer 361 in the second protection device 360, if being input to thermal conductivity cell detector 310
In carrier gas be closed or carrier gas flux that carrier gas flux detection means 350 is detected is less than second flow threshold value, then meter
When device 361 stop timing, reached until carrier gas flux detection means 350 detects the carrier gas flux in thermal conductivity cell detector 310
During second flow threshold value, just start reclocking.
First flow threshold value and second flow threshold value can be set as needed.First flow threshold value, which is generally higher than, to be equal to
Second flow threshold value.
Although by being described in conjunction with specific embodiments to the utility model, for those skilled in the art,
With changing will be apparent according to many replacements, modification made after mentioned above.Therefore, when such replacement, modification
When being fallen into change within the spirit and scope of appended claims, it should be included in the utility model.
Claims (4)
1. a kind of protection structure of thermal conductivity cell detector, it is characterised in that including：
Heater, the heater is connected to the thermal conductivity cell detector, and the thermal conductivity cell detector is heated；
Temperature-detecting device, the temperature-detecting device is connected to the thermal conductivity cell detector, detects the thermal conductivity cell detector
Interior temperature；
Carrier gas flux detection means, the carrier gas flux detection means is connected to the thermal conductivity cell detector, detects the load of input
Carrier gas flux of the gas in the thermal conductivity cell detector；
First protection device, first protection device is connected to the temperature-detecting device and the heater, and works as
When the temperature that the temperature-detecting device is detected exceeds predetermined temperature threshold, first protection device makes the heating
Device stops heating the thermal conductivity cell detector；With
Second protection device, second protection device is connected to the carrier gas flux detection means and the thermal conductivity cell detector
In sensor, and when the thermal conductivity cell detector is in what heated condition and the carrier gas flux detection means were detected
When the carrier gas flux is less than first flow threshold value, second protection device closes the bridge stream of the sensor.
2. protection structure as claimed in claim 1, it is characterised in that second protection device further comprises timer simultaneously
And it is connected further to the heater；
When the thermal conductivity cell detector is in the carrier gas stream that starting state and the carrier gas flux detection means are detected
Amount is when reaching second flow threshold value, and the timer starts timing, and reach in the timer predetermined amount of time it
Afterwards, second protection device makes the heater heat the thermal conductivity cell detector and makes the sensor
Bridge conductance leads to.
3. protection structure as claimed in claim 2, it is characterised in that in during the timing of the timer, is carried when described
When the carrier gas flux that air flow detecting device is detected is less than the second flow threshold value, the timer stops timing.
4. protection structure as claimed in claim 2 or claim 3, it is characterised in that the first flow threshold value is more than or equal to described the
Two flow thresholds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621262870.7U CN206399918U (en) | 2016-11-22 | 2016-11-22 | The protection structure of thermal conductivity cell detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621262870.7U CN206399918U (en) | 2016-11-22 | 2016-11-22 | The protection structure of thermal conductivity cell detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206399918U true CN206399918U (en) | 2017-08-11 |
Family
ID=59508905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621262870.7U Expired - Fee Related CN206399918U (en) | 2016-11-22 | 2016-11-22 | The protection structure of thermal conductivity cell detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206399918U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557130A (en) * | 2017-09-25 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of measurement and control method for detection gas thermal conductivity |
-
2016
- 2016-11-22 CN CN201621262870.7U patent/CN206399918U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557130A (en) * | 2017-09-25 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of measurement and control method for detection gas thermal conductivity |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170811 Termination date: 20181122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |