CN210982314U - Oxygen detection device for combustible gas - Google Patents
Oxygen detection device for combustible gas Download PDFInfo
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- CN210982314U CN210982314U CN201921999981.XU CN201921999981U CN210982314U CN 210982314 U CN210982314 U CN 210982314U CN 201921999981 U CN201921999981 U CN 201921999981U CN 210982314 U CN210982314 U CN 210982314U
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- oxygen
- combustible gas
- detecting device
- gas according
- molecular sieve
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Abstract
The utility model discloses an oxygen detection device for combustible gas, including oxygen sensor, still include the box, be provided with the first joint that is used for letting in ordinary pressure sample gas on the box and the second that lets in high-pressure inert gas connects, be provided with diverter valve and molecular sieve post in the box, first joint and second connect all to link to each other with the diverter valve through the pipeline, molecular sieve post and oxygen sensor are connected gradually to the diverter valve through the pipeline. The device is mainly used for detecting the concentration of oxygen in the coke oven gas; on one hand, in order to improve the fluidity of the sample gas in the device, the high-pressure inert gas is particularly introduced as a power source; on the other hand, separately isolate oxygen through the molecular sieve post and get into oxygen sensor and detect to improved the accuracy that detects, also improved detection efficiency simultaneously, and this device simple structure, convenient operation, degree of automation height.
Description
Technical Field
The utility model belongs to the technical field of the check out test set and specifically relates to an oxygen detection device for combustible gas.
Background
The traditional detection of the oxygen concentration is mainly single detection by using an oxygen sensor. However, the detected gas components are complex, and the common single oxygen sensor cannot accurately detect the concentration of oxygen in the gas.
An oxygen sensor is a sensor that measures the concentration of oxygen. The oxygen sensor is a measuring element which utilizes a ceramic sensitive element to measure the oxygen potential in various heating furnaces or exhaust pipelines, calculates the corresponding oxygen concentration by a chemical equilibrium principle, achieves the purposes of monitoring and controlling the combustion air-fuel ratio in the furnace and ensuring the product quality and the tail gas emission to reach the standard, and is widely applied to the atmosphere control of furnace bodies of various coal combustion, oil combustion, gas combustion and the like. For example, in the automobile industry, an automobile oxygen sensor is a key feedback sensor in an electronic fuel injection engine control system, and is a key part for controlling automobile exhaust emission, reducing the environmental pollution of an automobile and improving the fuel combustion quality of an automobile engine. The conventional oxygen sensor is mainly classified into: chemical oxygen sensors, infrared laser oxygen sensors and magnetic oxygen sensors. However, the chemical oxygen sensor has short service life, the infrared laser oxygen sensor has high cost and poor interference resistance, and the dumbbell ball of the magnetic oxygen sensor is easy to deviate by side-emitting light when being adhered and swung by adhesive gas, so that the measurement is not accurate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the tradition to the detection mode of oxygen concentration single with traditional oxygen sensor short-lived, anti-interference poor, measure not accurate technical problem provide an oxygen detection device for combustible gas.
The utility model adopts the technical proposal that: a oxygen detection device for combustible gas, including oxygen sensor, still include the box, be provided with the first joint that is used for letting in ordinary pressure sample gas on the box and let in high-pressure inert gas's second joint, be provided with diverter valve and molecular sieve post in the box, first joint and second joint all link to each other with the diverter valve through the pipeline, the diverter valve passes through the pipeline and connects gradually molecular sieve post and oxygen sensor. The device is mainly used for detecting the concentration of oxygen in the coke oven gas. The detected sample gas is coke oven gas, and the detected coke oven gas is mainly normal pressure or low pressure. In order to increase the flowability of the sample gas in the apparatus, an inert gas is introduced at a high pressure. And the sample gas enters the switching valve through the first joint, the high-pressure inert gas enters the switching valve through the second joint, and the sample gas and the inert gas are mixed in the switching valve. The inert gas is used as power output to blow the mixed gas in the switching valve to the molecular sieve column, and the inert gas is stable and does not react with other gases. The molecular sieve column is a common gas separation device in the prior art, mainly comprises a column body and a molecular sieve arranged in the column body, and can separate oxygen from mixed gas, and after the mixed gas in the switching valve is separated by the molecular sieve column, the oxygen enters an oxygen sensor for detection, so that the concentration of the oxygen is obtained. On one hand, in order to improve the fluidity of the sample gas in the device, the high-pressure inert gas is particularly introduced as a power source; on the other hand, separately isolate oxygen through the molecular sieve post and get into oxygen sensor and detect to improved the accuracy that detects, also improved detection efficiency simultaneously, and this device simple structure, convenient operation, degree of automation height.
Further, the switching valve is further provided with a flow valve, the flow of corresponding gas can be controlled according to requirements, and therefore the accuracy of detection results is guaranteed.
Further, a heat insulation layer is arranged in the box body, and the oxygen sensor and the molecular sieve column are arranged in the heat insulation layer. The whole detection process is carried out under a constant temperature condition, and the detection accuracy is improved.
Further, a heating mechanism is arranged in the heat insulation layer. The heating mechanism can heat the detection environment, so that the detection process is carried out in a more proper temperature range, the detection accuracy is favorably improved, and the heating mechanism can be an electric heating wire or other heaters.
Furthermore, a temperature sensor is arranged in the heat insulation layer, so that the temperature in the heat insulation layer can be detected in real time, and then the temperature can be regulated and controlled through a heating mechanism, and the accuracy of detection is ensured.
Further, the oxygen sensor comprises a sealed detection mechanism, one end of the detection mechanism is provided with a power line, the other end of the detection mechanism is provided with a signal line, a detection cavity is arranged in the detection mechanism, an air inlet pipe and an air outlet pipe communicated with the detection cavity are arranged on the detection mechanism, a vibration mechanism is arranged in the detection cavity and comprises a transmission vibration electrode connected with the power line and a signal collector connected with the signal line, and the transmission vibration electrode and the signal collector are arranged at a certain distance. Oxygen enters the detection cavity from the air inlet pipe, the power line is connected with the emission oscillation electrode, the power line is electrified, the oxygen in the detection cavity collides with the emission oscillation electrode to generate direct impact to form oscillation and generate electric charge to form current, the current generated by gas oscillation flows into the signal collector, and the signal collector outputs the received current signal through the signal line. Due to the particularity of oxygen, under the action of the frequency of the transmitting oscillation electrode, the signal generated by the oxygen is opposite to the current signals of other gases under proper voltage and frequency, so that the distinguishing and the distinguishing are more favorable for collection, and the magnitude of the signal is in direct proportion to the concentration of the oxygen. The concentration of oxygen in the mixed gas can be detected by detecting the signal. Because the signal that oxygen produced is to the contrary with other gaseous current signal, consequently, even the molecular sieve post does not have the clean oxygen of separation, the oxygen sensor also only detects the concentration of oxygen in the gas, and remaining gas can not be detected, consequently, this device commonality is higher, detect accurate, the precision is high, detect fast, long service life.
Furthermore, the transmitting oscillation electrode and the signal collector are both composed of at least two contacts and oscillation wires connected in series between the contacts, the contact frames are used for forming frames of the transmitting oscillation electrode and the signal collector and used for transmitting electric energy, the oscillation wires are used for exciting gas to oscillate, when gas collides with the oscillation wires, direct impact is generated to form oscillation and generate charges to form current, and the structure is simple and the efficiency is high.
Furthermore, the transmitting oscillation electrode and the signal collector are all isosceles triangles formed by three contact points and oscillation wires sequentially connected in series between the three contact points. Under the condition of guaranteeing to detect intracavity gas flow, make the volume maximize that the transmission shakes utmost point and signal collector, further improve and shake silk and gas area of contact.
Further, each contact is welded with a platinum ball head, and the oscillation wire is connected with the platinum ball head. The bright platinum ball head is beneficial to radio frequency emission and has the functions of oxidation resistance, acid and alkali resistance and corrosion resistance; and the two are connected by welding, so that the connection between the two is firmer and the stability is improved.
Furthermore, the detection mechanism, the air inlet pipe and the air outlet pipe are all made of stainless steel, and have the functions of pressure resistance, high temperature resistance, good sealing performance and oxidation resistance.
The utility model has the advantages that:
1. on one hand, the utility model is to improve the fluidity of the sample gas in the device, and particularly to introduce high-pressure inert gas as a power source; on the other hand, separately isolate oxygen through the molecular sieve post and get into oxygen sensor and detect to improved the accuracy that detects, also improved detection efficiency simultaneously, and this device simple structure, convenient operation, degree of automation height.
2. The oxygen sensor and the molecular sieve column are arranged in the heat-insulating layer, so that the whole detection process is carried out under a constant temperature condition, and the detection accuracy is improved;
3. the detection environment can be heated through the heating mechanism, so that the detection process is carried out within a more proper temperature range, and the detection accuracy is improved.
4. The utility model discloses an oxygen sensor vibrates the utmost point through gaseous collision transmission and produces and directly hit formation and vibrate and produce electric charge and form the electric current, passes through the signal line output at the passing signal collector with received current signal, and then detects the concentration of oxygen, device simple structure, detection speed are fast, long service life, precision are high, the usage is wide.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural view of the switching valve.
Fig. 4 is a cross-sectional view of the present invention.
Fig. 5 is a schematic structural view of the oxygen sensor.
Fig. 6 is a partially enlarged view of a in fig. 5.
Labeled as:
1. a box body; 11. a first joint; 12. a second joint; 13. a heat-insulating layer; 14. a temperature sensor;
2. an oxygen sensor; 21. a detection mechanism; 22. a power line; 23. a signal line; 24. an air inlet pipe; 25. an air outlet pipe; 26. transmitting the oscillation electrode; 27. a signal collector; 211. a detection chamber; 2101. a contact; 2102. vibrating the silk; 2103. a platinum ball head;
3. a switching valve; 4. a flow valve; 5. a molecular sieve column.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 to 4, the oxygen detection device for combustible gas comprises an oxygen sensor 2, and further comprises a box body 1, wherein a first joint 11 for introducing normal pressure sample gas and a second joint 12 for introducing high pressure inert gas are arranged on the box body 1, a switching valve 3 and a molecular sieve column 5 are arranged in the box body 1, the first joint 11 and the second joint 12 are both connected with the switching valve 3 through a pipeline, and the switching valve 3 is sequentially connected with the molecular sieve column 5 and the oxygen sensor 2 through a pipeline; the switching valve 3 is also provided with a flow valve 4.
The working principle is as follows: the detected sample gas is coke oven gas, and the detected coke oven gas is normal pressure. In order to improve the fluidity of the coke oven gas in the device, high-pressure inert gas is particularly introduced. The coke oven gas enters the switching valve through the first connector, the high-pressure inert gas enters the switching valve through the second connector, and the coke oven gas and the inert gas are mixed in the switching valve. The inert gas is used as power output to blow the mixed gas in the switching valve to the molecular sieve column, and the inert gas is stable and does not react with other gases. The molecular sieve column is a common gas separation device in the prior art, mainly comprises a column body and a molecular sieve arranged in the column body, and can separate oxygen from mixed gas, and after the mixed gas in the switching valve is separated by the molecular sieve column, the oxygen enters an oxygen sensor for detection, so that the concentration of the oxygen is obtained. On one hand, in order to improve the fluidity of the coke oven gas in the device, the high-pressure inert gas is particularly introduced as a power source; on the other hand, separately isolate oxygen through the molecular sieve post and get into oxygen sensor and detect to improved the accuracy that detects, also improved detection efficiency simultaneously, and this device simple structure, convenient operation, degree of automation height.
Example two:
in this embodiment, a further improvement is made on the basis of the first embodiment, as shown in fig. 4, an insulating layer 13 is arranged in the box body 1, and the oxygen sensor 2 and the molecular sieve column 5 are arranged in the insulating layer 13;
the working principle is as follows: the heat-insulating layer 13 is made of asbestos, so that the whole detection process is carried out under a constant temperature condition, and the detection accuracy is improved.
Example three:
the present embodiment is a further improvement on the second embodiment, and a heating mechanism (not shown in the figure) is arranged in the heat-insulating layer 13; and a temperature sensor 14 is arranged in the heat insulation layer 13.
The working principle is as follows: the heating mechanism is an electric heating wire, and can heat the detection environment, so that the detection process is carried out within a more proper temperature range, and the detection accuracy is improved. The temperature sensor can detect the temperature in the heat preservation layer in real time, and then the temperature can be regulated and controlled through the heating mechanism, so that the accuracy of detection is guaranteed.
Example four:
this embodiment is a further improvement made on the basis of embodiment one, as shown in fig. 5 and fig. 6, the oxygen sensor 2 includes a sealed detection mechanism 21, one end of the detection mechanism 21 is provided with a power cord 22, and the other end is provided with a signal line 23, a detection cavity 211 is provided in the detection mechanism 21, an air inlet pipe 24 and an air outlet pipe 25 communicated with the detection cavity 211 are provided on the detection mechanism 21, an oscillation mechanism is provided in the detection cavity 211, the oscillation mechanism includes an emission oscillation electrode 26 connected with the power cord 22 and a signal collector 27 connected with the signal line 23, and the emission oscillation electrode 26 and the signal collector 27 are arranged at a certain distance.
The transmitting oscillator 26 and the signal collector 27 are each composed of at least two contacts 2101 and an oscillator filament 2102 connected in series between the contacts 2101. The transmitting oscillator 26 and the signal collector 27 are both isosceles triangles formed by three contacts 2101 and an oscillator filament 2102 connected in series between the three contacts 2101 in sequence. Each contact 2101 is welded with a platinum ball head 2103, and the oscillation wire 2102 is connected with the platinum ball head 2103. The detection mechanism 21, the air inlet pipe 24 and the air outlet pipe 25 are all made of stainless steel.
The working principle is as follows: the voltage of the detection mechanism is adjustable within the range of 20-100V/DC, and the frequency of the high-frequency power supply is adjustable within the range of 1 KHz-1 MHz. The contact of the transmitting oscillator is made of silicon, nickel, zirconium, titanium, platinum and other substances through sintering and grinding at high temperature, and the resistance of the oscillation wire of the transmitting oscillator is between 1.9G ohm and 2G ohm. The contact of the signal collector is made of silicon, nickel, zirconium, titanium, platinum and other substances through sintering and grinding at high temperature, and the resistance of the oscillation wire of the transmitting oscillation electrode is between 1K ohm and 1.2K ohm. The difference in the ratio of the two components causes the resistance of the two to be different. The mixed gas enters into the detection chamber from the intake pipe, and the power cord links to each other with the transmission oscillation utmost point, and the power cord circular telegram detects the oscillation silk production of the gaseous collision transmission oscillation utmost point of intracavity and directly hits formation oscillation and produce electric charge and form the electric current, and the electric current that the gaseous oscillation produced flows into the signal collector, and the signal collector passes through the signal line output with the electric current signal received. Due to the particularity of oxygen, under the action of the frequency of the transmitting oscillation electrode, the signal generated by the oxygen is opposite to the current signals of other gases under proper voltage and frequency, so that the distinguishing and the distinguishing are more favorable for collection, and the magnitude of the signal is in direct proportion to the concentration of the oxygen. The concentration of oxygen in the mixed gas can be detected by detecting the signal. The utility model discloses simple structure, detection speed are fast, long service life, precision height, usage are wide.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Oxygen detection device for combustible gases, comprising an oxygen sensor (2), characterized in that: still include box (1), be provided with first joint (11) that are used for letting in ordinary pressure sample gas on box (1) and let in high-pressure inert gas's second joint (12), be provided with diverter valve (3) and molecular sieve post (5) in box (1), first joint (11) and second joint (12) all link to each other with diverter valve (3) through the pipeline, diverter valve (3) connect gradually molecular sieve post (5) and oxygen sensor (2) through the pipeline.
2. The oxygen detecting device for combustible gas according to claim 1, wherein: the switching valve (3) is also provided with a flow valve (4).
3. The oxygen detecting device for combustible gas according to claim 1, wherein: a heat preservation layer (13) is arranged in the box body (1), and the oxygen sensor (2) and the molecular sieve column (5) are arranged in the heat preservation layer (13).
4. The oxygen detecting device for combustible gas according to claim 3, wherein: and a heating mechanism is arranged in the heat-insulating layer (13).
5. The oxygen detecting device for combustible gas according to claim 3, wherein: and a temperature sensor (14) is arranged in the heat-insulating layer (13).
6. The oxygen detecting device for combustible gas according to claim 1, wherein: oxygen sensor (2) are including sealed detection mechanism (21), detection mechanism (21) one end is provided with power cord (22), and another is provided with signal line (23), be provided with in detection mechanism (21) and detect chamber (211), be provided with intake pipe (24) and outlet duct (25) with detecting chamber (211) intercommunication on detection mechanism (21), be provided with in detecting chamber (211) and vibrate the mechanism, vibrate the mechanism and vibrate utmost point (26) and signal collector (27) continuous with signal line (23) including the transmission that links to each other with power cord (22), the transmission vibrates utmost point (26) and signal collector (27) interval certain distance and arranges.
7. The oxygen detecting device for combustible gas according to claim 6, wherein: the transmitting oscillator (26) and the signal collector (27) are both composed of at least two contacts (2101) and an oscillator wire (2102) connected in series between the contacts (2101).
8. The oxygen detecting device for combustible gas according to claim 7, wherein: the transmitting oscillator (26) and the signal collector (27) are isosceles triangles which are formed by three contacts (2101) and an oscillator wire (2102) which is sequentially connected among the three contacts (2101) in series.
9. The oxygen detecting device for combustible gas according to claim 7, wherein: and each contact (2101) is welded with a platinum ball head (2103), and the oscillation wire (2102) is connected with the platinum ball head (2103).
10. The oxygen detecting device for combustible gas according to claim 6, wherein: the detection mechanism (21), the air inlet pipe (24) and the air outlet pipe (25) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921999981.XU CN210982314U (en) | 2019-11-19 | 2019-11-19 | Oxygen detection device for combustible gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921999981.XU CN210982314U (en) | 2019-11-19 | 2019-11-19 | Oxygen detection device for combustible gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210982314U true CN210982314U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921999981.XU Active CN210982314U (en) | 2019-11-19 | 2019-11-19 | Oxygen detection device for combustible gas |
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| Country | Link |
|---|---|
| CN (1) | CN210982314U (en) |
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2019
- 2019-11-19 CN CN201921999981.XU patent/CN210982314U/en active Active
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