CN204536196U - Gas sensor - Google Patents
Gas sensor Download PDFInfo
- Publication number
- CN204536196U CN204536196U CN201520055988.1U CN201520055988U CN204536196U CN 204536196 U CN204536196 U CN 204536196U CN 201520055988 U CN201520055988 U CN 201520055988U CN 204536196 U CN204536196 U CN 204536196U
- Authority
- CN
- China
- Prior art keywords
- admission piece
- threaded
- housing
- gas sensor
- upper shell
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of gas sensor, comprise the inner housing for cavity, described shell one end is provided with the admission piece and exhaust nozzle that are threaded with housing, the housing other end is provided with the water joint be threaded with housing, explosion-proof filter, detection of gas element and circuit board is disposed with from admission piece one end to water joint one end in housing, be provided with air guide channel between described admission piece and explosion-proof filter, described air guide channel is threaded with housing near admission piece one end.The sensor of this structure, has the advantage that explosion-proof performance is strong, particularly has and makes T
90diminish, thus the advantage that response speed is accelerated.
Description
Technical field
The utility model relates to gas monitoring techniques field, is specifically related to a kind of gas sensor.
Background technology
Term response time T
90refer to when the measure gas concentrations generation Spline smoothing of inflow gas sensor, the time required when sensor output value reaches 90% of stationary value.
At present, in monitored places such as municipal sewage system, sewage treatment plant, septic tank, methane-generating pit, garbage disposal plants, the gas such as poisonous, inflammable, explosive that methane (CH4), ammonia (NH3), sulfuretted hydrogen (H2S), carbon monoxide (CO) etc. are a large amount of can be produced, the existence of these gases causes annual various places to have the generation of a lot of blast, poisoning, the accident such as to suffocate, and therefore needs to monitor these hazardous gas concentration.
When monitoring the concentration of these hazardous gases, need use gas sensor, there is poor sealing performance, explosion-proof performance is weak, sensitivity is low, monitoring accuracy is low and response speed is slow shortcoming in existing gas sensor.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of gas sensor, makes it have the advantage of the strong and fast response time of explosion-proof performance.
The utility model is solved the problem by following technological means: a kind of gas sensor, comprise the inner housing for cavity, described shell one end is provided with the admission piece and exhaust nozzle that are threaded with housing, the housing other end is provided with the water joint be threaded with housing, explosion-proof filter, detection of gas element and circuit board is disposed with from admission piece one end to water joint one end in housing, be provided with air guide channel between described admission piece and explosion-proof filter, described air guide channel is threaded with housing near admission piece one end.
Further, described inner walls is provided with step, and described step is provided with through hole, and described air guide channel passes through hole away from admission piece one end and coordinates with via clearance.
Further, described housing comprises upper shell, holder, base and lower house, described admission piece and exhaust nozzle are all threaded with upper shell, described upper shell is connected with holder threaded one end, the described holder other end is connected with base threaded one end, the described base other end is threaded with lower house, and described water joint is threaded with lower house.
Further, on the mating surface of described upper shell and holder, on the mating surface of holder and base, between explosion-proof filter and detection of gas element and between the outer wall of detection of gas element and the inwall of base, O-ring seal is provided with.
Further, described admission piece and exhaust nozzle are disposed in parallel in the top of upper shell, and admission piece is positioned at upper shell top center, and exhaust nozzle is arranged near admission piece.
Further, also comprise check washer, described admission piece and exhaust nozzle are all threaded with upper shell through after check washer.
Further, the installing plate removably connected with base is also comprised.
Further, described admission piece, exhaust nozzle and air guide channel are made by nickel-plated carbon steel.
Further, described upper shell, holder, base and lower house are made by 304 stainless steels.
The beneficial effects of the utility model:
1) explosion-proof filter is set in housing, makes it have very strong explosion-proof performance.
2) after gas enters from admission piece, explosion-proof filter surface is directly delivered to through air guide channel, contact with detection of gas element after explosion-proof filter filters, gas can be made to contact with detection of gas element fast, thus make the response speed of this gas sensor accelerate (T
90diminish), compare the existing gas sensor without air guide channel, T
90reduce 5-12 second.
3) step be arranged so that define a gas held space between step and gas detecting element, gas outwards slowly can only be discharged by the gap between air guide channel and through hole, this extends the duration of contact of gas and detection of gas element, not only be conducive to improving sensitivity, and further increase response speed.
4) admission piece and exhaust nozzle are disposed in parallel in the top of upper shell, admission piece is positioned at upper shell top center, exhaust nozzle is arranged near admission piece, and this structure improves the distributing homogeneity in spatial accommodation that gas formed between step and detecting element, is conducive to the raising of monitoring accuracy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is front view of the present utility model;
Fig. 3 is A-A schematic diagram;
Fig. 4 is upper shell structural representation;
Fig. 5 is the structural representation of holder;
Fig. 6 is the structural representation of base;
Fig. 7 is the structural representation of lower house.
Embodiment
Below with reference to accompanying drawing, the utility model is described in detail, as shown in figs. 1-7: the utility model provides a kind of gas sensor, comprise the inner housing for cavity, described shell one end is provided with the admission piece 2 and exhaust nozzle 3 that are threaded with housing, admission piece and exhaust nozzle and cavity connects, the housing other end is provided with the water joint 4 be threaded with housing, explosion-proof filter 5 is disposed with from admission piece one end to water joint one end in housing, detection of gas element 6 and circuit board 7, air guide channel 8 is provided with between described admission piece and explosion-proof filter, described air guide channel is threaded with housing near admission piece one end.The sensor of this structure, arranges explosion-proof filter in housing, makes it have very strong explosion-proof performance; After gas enters from admission piece, be directly delivered to explosion-proof filter surface through air guide channel, contact with detection of gas element after explosion-proof filter filters, gas can be made to contact with detection of gas element fast, thus make the response speed of this gas sensor accelerate (T
90diminish), compare the existing gas sensor without air guide channel, T
90reduce 5-12 second.
As the further improvement of technique scheme, described inner walls is provided with step 9, described step is provided with through hole 901, and described air guide channel passes through hole away from admission piece one end and coordinates with via clearance.Being arranged so that of step defines a gas held space between step and gas detecting element, gas outwards slowly can only be discharged by the gap between air guide channel and through hole, this extends the duration of contact of gas and detection of gas element, is not only conducive to improving sensitivity but also further increasing response speed.
As the further improvement of technique scheme, admission piece and exhaust nozzle are disposed in parallel in the top of upper shell, admission piece is positioned at upper shell top center, exhaust nozzle is arranged near admission piece, this structure improves the distributing homogeneity in spatial accommodation that gas formed between step and detecting element, is conducive to the raising of monitoring accuracy.
For making technique scheme clearly, enumerate more specifically embodiment below:
A kind of gas sensor, comprise the inner housing for cavity, described housing comprises upper shell 101, holder 102, base 103 and lower house 104, described upper shell, holder, base and lower house are made by 304 stainless steels that Anticorrosive Character is strong, described upper shell top is set side by side with admission piece 2 and exhaust nozzle 3, and admission piece is positioned at upper shell top center, exhaust nozzle is arranged near admission piece, improve the distributing homogeneity in spatial accommodation that gas formed between step and detecting element, be conducive to the raising of this gas sensor monitors precision, also comprise check washer 11, admission piece 2 and exhaust nozzle 3 are threaded with upper shell 101 through after check washer 11, admission piece and exhaust nozzle are made by corrosion resistant nickel-plated carbon steel, described upper shell 101 is connected with holder 102 threaded one end, described holder 102 other end is connected with base 103 threaded one end, the described base other end is threaded with lower house 104, described lower house is provided with the water joint 4 be threaded with lower house, the mode be threaded connection can make upper shell, holder, base and lower house connect into a unified housing fast or are disassembled into by housing independently individual, be convenient to install, explosion-proof filter 5 is disposed with from admission piece one end to water joint one end in housing, detection of gas element 6 and circuit board 7, air guide channel 8 is provided with between described admission piece and explosion-proof filter, described air guide channel is threaded with housing near admission piece one end, described inner walls is provided with step 9, described step is provided with through hole 901, described air guide channel passes through hole away from admission piece one end and coordinates with via clearance, explosion-proof filter makes this gas sensor have very strong explosion-resistance characteristic, detection of gas element 6 adopts infrared gas sensor, infrared gas sensor is integrated on circuit board 7, transmission cable is electrically connected through water joint and circuit board, air guide channel 8 is made up of nickel-plated carbon steel, after gas enters from admission piece, explosion-proof filter surface is directly delivered to through air guide channel, contact with detection of gas element after explosion-proof filter filters, gas can be made to contact with detection of gas element fast, thus make this gas sensor response time T
90diminish, namely response speed is accelerated, being arranged so that of step 9 defines a gas held space between step and gas detecting element, gas outwards slowly can only be discharged by the gap between air guide channel and through hole, this extends the duration of contact of gas and detection of gas element, not only be conducive to improving sensitivity, and further increase response speed.
On the mating surface of described upper shell and holder, on the mating surface of holder and base, between explosion-proof filter and detection of gas element and between the outer wall of detection of gas element and the inwall of base, be provided with O-ring seal 10.Arranging of O-ring seal can improve this gas sensor sealing property (comprising the gentle close property of waterproof sealing performance) further.
Described base is detachably provided with installing plate, particularly, described base 103 is provided with flange platform 1031, base is divided into upper and lower part by described flange platform, described installing plate comprises the first plate body 1201 and the second plate body 1202 connected vertically, described first plate body is provided with circular hole, and the lower part of described base is through circular hole, and described first plate body is removably connected by cross recessed countersunk head sscrew 13 and flange platform.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (9)
1. a gas sensor, it is characterized in that: comprise the inner housing for cavity, described shell one end is provided with the admission piece (2) and exhaust nozzle (3) that are threaded with housing, the housing other end is provided with the water joint (4) be threaded with housing, explosion-proof filter (5), detection of gas element (6) and circuit board (7) is disposed with to water joint one end from admission piece one end in housing, be provided with air guide channel (8) between described admission piece and explosion-proof filter, described air guide channel is threaded with housing near admission piece one end.
2. gas sensor according to claim 1, is characterized in that: described inner walls is provided with step (9), described step is provided with through hole (901), and described air guide channel passes through hole away from admission piece one end and coordinates with via clearance.
3. gas sensor according to claim 1 and 2, it is characterized in that: described housing comprises upper shell (101), holder (102), base (103) and lower house (104), described admission piece and exhaust nozzle are all threaded with upper shell, described upper shell is connected with holder threaded one end, the described holder other end is connected with base threaded one end, the described base other end is threaded with lower house, and described water joint is threaded with lower house.
4. gas sensor according to claim 3, is characterized in that: on the mating surface of described upper shell and holder, on the mating surface of holder and base, be provided with O-ring seal (10) between explosion-proof filter and detection of gas element and between the outer wall of detection of gas element and the inwall of base.
5. gas sensor according to claim 4, is characterized in that: described admission piece and exhaust nozzle are disposed in parallel in the top of upper shell, and admission piece is positioned at upper shell top center, and exhaust nozzle is arranged near admission piece.
6. gas sensor according to claim 5, is characterized in that: also comprise check washer (11), described admission piece and exhaust nozzle are all threaded with upper shell through after check washer.
7. gas sensor according to claim 6, is characterized in that: also comprise the installing plate removably connected with base.
8. gas sensor according to claim 7, is characterized in that: described admission piece, exhaust nozzle and air guide channel are made by nickel-plated carbon steel.
9. gas sensor according to claim 8, is characterized in that: described upper shell, holder, base and lower house are made by 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055988.1U CN204536196U (en) | 2015-01-27 | 2015-01-27 | Gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055988.1U CN204536196U (en) | 2015-01-27 | 2015-01-27 | Gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536196U true CN204536196U (en) | 2015-08-05 |
Family
ID=53750182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520055988.1U Withdrawn - After Issue CN204536196U (en) | 2015-01-27 | 2015-01-27 | Gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204536196U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596973A (en) * | 2015-01-27 | 2015-05-06 | 重庆蓝图信息产业股份有限公司 | Gas sensor and method for detecting concentration of methane gas in septic tank by using gas sensor |
| CN108445152A (en) * | 2018-02-06 | 2018-08-24 | 重庆永安畜牧开发有限公司 | Atmospheric monitoring system for improving pig-breeding quality |
-
2015
- 2015-01-27 CN CN201520055988.1U patent/CN204536196U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596973A (en) * | 2015-01-27 | 2015-05-06 | 重庆蓝图信息产业股份有限公司 | Gas sensor and method for detecting concentration of methane gas in septic tank by using gas sensor |
| CN104596973B (en) * | 2015-01-27 | 2017-04-26 | 重庆蓝图信息产业股份有限公司 | Gas sensor and method for detecting concentration of methane gas in septic tank by using gas sensor |
| CN108445152A (en) * | 2018-02-06 | 2018-08-24 | 重庆永安畜牧开发有限公司 | Atmospheric monitoring system for improving pig-breeding quality |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20170426 |