CN203551341U - Protection system for sampling outrange of gas sensor - Google Patents
Protection system for sampling outrange of gas sensor Download PDFInfo
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- CN203551341U CN203551341U CN201320398001.7U CN201320398001U CN203551341U CN 203551341 U CN203551341 U CN 203551341U CN 201320398001 U CN201320398001 U CN 201320398001U CN 203551341 U CN203551341 U CN 203551341U
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- gas
- gas sensor
- outrange
- protection system
- cavity
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Abstract
The utility model provides a protection system for a sampling outrange of a gas sensor. The protection system comprises a cavity, a gas pump and a controller, wherein a gas sensor is located in the cavity; the gas sensor is electrically connected with the controller; the cavity and the gas pump are connected to form a closed gas circuit comprising a gas inlet path and a gas returning path; the gas inlet path is serially connected with a first reversing valve and the gas returning path is serially connected with a second reversing valve; the first reversing valve and the second reversing valve are electrically connected with the controller. According to the protection system, the service life of the gas sensor is prolonged and the gas sensor is prevented from being damaged under an outrange environment.
Description
Technical field
The utility model relates to a kind of protection system of gas sensor outrange, belongs to the technical fields such as gas sampling analysis, detection, airtight detection.
Background technology
Majority of gas sample detecting equipment all adopts suction-type detection method, first gathers that gas carries out subsequent analysis again or when sampling carried out interpretation of result simultaneously.This checkout equipment is by external equipment, the mixed gas of object gas and air to be drawn in the middle of checkout equipment, then by various sensings in the middle of checkout equipment and analytical equipment Direct Analysis testing result, for our daily gas monitor is provided convenience.
Prior art scheme: the gas detection equipment using is at present directly the mixed gas of object gas and air to be drawn into checkout equipment by external equipment, by the gas sensor of checkout equipment inside, detect object gas content, thereby judge its Specifications.
The shortcoming of prior art: if gas sensor contacts the object gas of outrange for a long time or frequently, will cause expendable impact to gas sensor.
Summary of the invention
Problem to be solved in the utility model is to provide the protection system that a kind of gas sensor is worked in its outrange environment.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is a kind of protection system of gas sensor sampling outrange, comprises cavity, air pump and controller, and gas sensor is positioned at cavity, and gas sensor and controller electrically connect; Described cavity and air pump connect into a closed gas circuit, comprise air inlet path and return-air road, are connected in series the first reversal valve on described air inlet path, and described return-air is connected in series the second reversal valve on road.
When gas sensor is during in testing state, the first reversal valve is connected air inlet path, for gas sensor, detects gas concentration, the second reversal valve is connected air pump with external environment, gas flows to air pump by cavity, and final gas flow external environment, disconnects return-air road; When gas sensor is during in outrange, the first reversal valve is communicated with external environment with air pump, and the second reversal valve is connected return-air road, and ambient atmos flows into cavity by air pump, thereby dilution sensor ambient gas concentration reaches the object of blanket gas sensor.
In the utility model, gas sensor is responsible for detecting object gas, is the object of protection of this protection system, detection signal is transferred to controller simultaneously; Air pump is the power resources of gas circuit, for gas communication provides safeguard; The first reversal valve and the second reversal valve are responsible for the switching of gas circuit, the order of implementation controller; Controller is responsible for collecting the feedback information of gas sensor, and by feedback information, controls the duty of two reversal valves.
The utility model is controlled the flow direction of air-flow by increasing the support equipments such as reversal valve; when gas sensor contacts the object gas of outrange for a long time or frequently; this protection system is switched to corresponding position by two reversal valves; make gas sensor in guard mode; even if the cavity at gas sensor place is constantly filled with the air of circulation; thereby reduce rapidly near the concentration of object gas sensor; finally can prevent that sensor is impaired; extend the serviceable life of sensor, and guaranteed the accuracy of detection of equipment.
In the utility model, the first reversal valve and the second reversal valve can be solenoid valve or Pneumatic valve, are elected to while using solenoid valve, and solenoid valve and controller electrically connect; The optional electromagnetic pump of air pump; Can on air inlet path, be connected in series flowmeter, and flowmeter and controller electrically connect, flowmeter is responsible for detecting gas flow, detection signal is transferred to controller simultaneously; Also can on air inlet path, be connected in series needle valve, needle valve is responsible for adjusting gas flow.
Advantage and the good effect that the utlity model has are: this protection system has extended the serviceable life of gas sensor, under outrange environment, have avoided gas sensor impaired.
Accompanying drawing explanation
Fig. 1 is gas sensor sample detecting working state figure in the utility model embodiment;
Fig. 2 is gas sensor sampling outrange guard mode figure in the utility model embodiment.
In figure: dotted line indication circuit, single solid line represents without gas, to pass through in gas circuit, and double solid line represents have gas to pass through in gas circuit.
1. gas sensor 2. flowmeter 3. needle valves
4. the first reversal valve 5. air pump 6. second reversal valves
7. controller 8. cavitys
Embodiment
Below in conjunction with accompanying drawing, enumerating following specific embodiment is further elaborated the utility model.
In the protection system of the gas sensor sampling outrange shown in the present embodiment, as shown in Figure 1 and Figure 2, comprise cavity 8, air pump 5 and controller 7, air pump 5 is selected electromagnetic pump, and gas sensor 1 is positioned at cavity 8, and gas sensor 1 electrically connects with controller 7; Cavity 8 connects into a closed gas circuit with electromagnetic pump, comprise air inlet path and return-air road, on air inlet path, be connected in series the first reversal valve 4, on return-air road, be connected in series the second reversal valve 6, the first reversal valve 4 and the second reversal valve 6 all electrically connect with controller 7, in the present embodiment, two reversal valves are all selected two-bit triplet solenoid valve, and all electrically connect with controller 7.
Under detected state, as shown in Figure 1, in order to regulate the gas flow of air inlet path, on air inlet path road, be connected in series a needle valve 3, in order to detect gas flow, on air inlet path, be connected in series a flowmeter 2, and flowmeter 2 electrically connects with controller 8, and air pump 5 provides negative pressure source, and object gas is inhaled into equipment, through the detection of gas sensor 1 and flowmeter 2, and detection data are fed back to controller 7 by circuit; Meanwhile, if object gas does not exceed gas sensor full scale, controller 7 will be controlled the gas flow of the first reversal valve 4 and the second reversal valve 6, and as shown in Figure 1, gas is directly discharged to the external world by the second reversal valve 6 to the equipment gas circuit of making the most at last.
When the object gas detecting exceedes gas sensor 1 full scale, air pump 5 provides positive pressure source, controller 7 will send guard signal, control the first reversal valve 4 and the second reversal valve 6 switching states, the equipment gas circuit of making as shown in Figure 2, by air from the first reversal valve 4 inspirations, by return-air road the most at last transfer of air in the cavity 8 at gas sensor 1 place, to be constantly filled with the method for air, carry out near the content of diluents sensor 1 object gas, the final blanket gas sensor 1 that plays a part, extended the serviceable life of gas sensor 1, and guaranteed the accuracy of detection of equipment.
Above embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (3)
1. a protection system for gas sensor sampling outrange, comprises cavity, air pump and controller, and gas sensor is positioned at cavity, and cavity is connected with air pump gas circuit, and gas sensor and controller electrically connect; It is characterized in that: described cavity and air pump connect into a closed gas circuit, comprise air inlet path and return-air road, be connected in series the first reversal valve on described air inlet path, described return-air is connected in series the second reversal valve on road.
2. the protection system of gas sensor sampling outrange according to claim 1, is characterized in that: described the first reversal valve is solenoid valve or Pneumatic valve.
3. the protection system of gas sensor sampling outrange according to claim 1, is characterized in that: described the second reversal valve is solenoid valve or Pneumatic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398001.7U CN203551341U (en) | 2013-07-05 | 2013-07-05 | Protection system for sampling outrange of gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398001.7U CN203551341U (en) | 2013-07-05 | 2013-07-05 | Protection system for sampling outrange of gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551341U true CN203551341U (en) | 2014-04-16 |
Family
ID=50469439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320398001.7U Expired - Fee Related CN203551341U (en) | 2013-07-05 | 2013-07-05 | Protection system for sampling outrange of gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551341U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323294A (en) * | 2013-07-05 | 2013-09-25 | 博益(天津)气动技术研究所有限公司 | Protective system for sampling outrange of gas sensor |
| CN108593854A (en) * | 2018-05-19 | 2018-09-28 | 江翠珍 | Flue gas pollutant automatic monitoring system |
-
2013
- 2013-07-05 CN CN201320398001.7U patent/CN203551341U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323294A (en) * | 2013-07-05 | 2013-09-25 | 博益(天津)气动技术研究所有限公司 | Protective system for sampling outrange of gas sensor |
| CN108593854A (en) * | 2018-05-19 | 2018-09-28 | 江翠珍 | Flue gas pollutant automatic monitoring system |
| CN108593854B (en) * | 2018-05-19 | 2021-10-29 | 江苏吉华电子科技有限公司 | Automatic monitoring system for smoke pollutants |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN BOYI PNEUMATIC TECHNOLOGY INSTITUTE CO., L Free format text: FORMER NAME: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST. CO. LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee after: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. Address before: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee before: Boyi (Tianjin) Pneumatic Technology Inst. Co. Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20160705 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |