CN202994230U - Dustproof and waterproof device of gaseous mass flow sensor - Google Patents
Dustproof and waterproof device of gaseous mass flow sensor Download PDFInfo
- Publication number
- CN202994230U CN202994230U CN 201220647378 CN201220647378U CN202994230U CN 202994230 U CN202994230 U CN 202994230U CN 201220647378 CN201220647378 CN 201220647378 CN 201220647378 U CN201220647378 U CN 201220647378U CN 202994230 U CN202994230 U CN 202994230U
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- cover
- upper cover
- lower cover
- filter membrane
- bowl
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- Expired - Fee Related
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Abstract
The utility model discloses a dustproof and waterproof device of a gaseous mass flow sensor of an air environment detection instrument. The dustproof and waterproof device is formed by combining an upper cover, a filtering film sleeve, a sealing ring and a lower cover, the upper cover is formed by a big cylinder and a small cylinder which are connected, a cavity is formed inside the upper cover, an air outlet is arranged in the center of the bottom portion and connected with a tube connector, and isotonic through holes are formed at the edge of the big cylinder of the upper cover. An appearance of the filtering film sleeve is in a shape of a bowl, a bowl bottom and a bowl opening are transparent, and a filtering film is bonded with the position close to the bottom of the bowl bottom. An appearance of the lower cover is in a shape of a cylinder, a cavity is formed inside the lower cover, the inner diameter of the lower cover is matched with the outer diameter of the small cylinder of the upper cover, the sealing ring is arranged at the bottom of the cavity, an air inlet is arranged in the center of the sealing ring and connected with a tube connector, and an end face of the built-in filtering film sleeve is tightly pressed on the sealing ring in the lower cover when the lower cover is tightly fitted with the upper cover. The dustproof and waterproof device has the advantages of prolonging service life, improving reliability of equipment, reducing stoppage rate and the like.
Description
Technical field
The utility model relates to a kind of air ambient detecting instrument, and more particularly, the utility model relates to a kind of anti-dust water-proof device of gas mass flow quantity sensor.
Background technology
Because the gas mass flow quantity sensor will actual the contact occur with gas, so gas need to carry out drying and go dust to process, therefore general before sensor gas need to stop entering of dust by silicon dioxide colloid and acticarbon, but this method is more loaded down with trivial details, and dust-proof effect is also undesirable.In the atmospheric sampling process, can produce the refluence of corrosive liquids when air pump is air-breathing in addition, cause sensor to damage.Enter sensor for preventing that corrosive liquid from flowing backwards, prior art is in the front of sensor, a surge flask to be installed, and allows corrosive liquids flow in surge flask.In sampling work, portably use the surge flask inconvenience, and dangerous, be anticorrosion, surge flask adopts glassware, but glassware is frangible, affects normally carrying out of sampling work.
Summary of the invention
The purpose of the present utility model is to overcome the deficiencies in the prior art, and a kind of anti-dust water-proof device of gas mass flow quantity sensor is provided.
The purpose of the present utility model is achieved through the following technical solutions:
A kind of anti-dust water-proof device of gas mass flow quantity sensor is combined by upper cover, filter membrane cover, O-ring seal and lower cover.Described upper cover small one and large one right cylinder for being connected is cavity in it, and the bottom is funnel-form, and the center of bottom is provided with the gas outlet and connects a pipe adapter, and the edge of described upper cover large cylinder is provided with the through hole of decile; Described filter membrane cover profile is bowl-shape, at the bottom of its bowl and the rim of a bowl penetrating, filter membrane of nearly bowl end bottom place's adhesion, the lower semisection inclined-plane of described filter membrane cover and upper cover cavity funnelform bottom closely attach; The profile of described lower cover is right cylinder, it is cavity in it, the internal diameter of described lower cover matches with the small cylinder external diameter of upper cover, the bottom of cavity is provided with O-ring seal, and the bottom is funnel-form, and its center is provided with air intake opening and connects a pipe adapter, the cylindrical edge of described lower cover is provided with the screw of decile, this screw matches with the through hole of upper cover, and when lower cover and upper cover close-fitting, the end face of the filter membrane cover that it is built-in compresses the O-ring seal in lower cover.Described filter membrane adopts the PTFE material to make, and first the PTFE material is pulled into thread lines, and then the lines diameter becomes tracing cloth shape filter membrane with the lines weaving less than 0.22um.
Compared with prior art, the utlity model has following beneficial effect:
1. improved the life-span of sensor;
2. improved the reliability of equipment;
3. the advantages such as failure rate have been reduced.
Description of drawings
Fig. 1-1 is the utility model decomposing schematic representation;
Fig. 1-2 is the utility model assembling schematic diagram;
Fig. 2-1 is the utility model upper cover front schematic view;
Fig. 2-2 are the utility model upper cover reverse side schematic diagram;
Fig. 3-1 is the utility model lower cover front schematic view;
Fig. 3-2 are the utility model lower cover reverse side schematic diagram;
Fig. 4-1 is the utility model filter membrane cover front schematic view;
Fig. 4-2 are the utility model filter membrane cover reverse side schematic diagram.
In figure: upper cover 1, filter membrane cover 2, O-ring seal 3, lower cover 4, pipe adapter 5-1,5-2, through hole 6, screw 7, venthole 8, air admission hole 9, bolt 10, filter membrane 11.
Embodiment
Below in conjunction with drawings and Examples, essentiality content of the present utility model is described in further detail:
As depicted in figs. 1 and 2: a kind of anti-dust water-proof device of gas mass flow quantity sensor is combined by upper cover 1, filter membrane cover 2, O-ring seal 3 and lower cover 4.As Fig. 2-1 with as shown in Fig. 2-2: upper cover 1 small one and large one right cylinder for being connected is cavity in it, and the bottom is funnel-form, and the center of bottom is provided with the gas outlet and connects a pipe adapter 5-1, and the edge of upper cover 1 large cylinder is provided with the through hole 6 of decile.As shown in Fig. 4-1 and Fig. 4-2: filter membrane cover 2 profiles are bowl-shape, at the bottom of its bowl and the rim of a bowl penetrating, filter membrane 11 of nearly bowl end bottom place's adhesion, the lower semisection inclined-plane of filter membrane cover 2 and upper cover 1 cavity funnelform bottom closely attaches.As shown in Fig. 3-1 and Fig. 3-2: the profile of lower cover 4 is right cylinder, it is cavity in it, the internal diameter of lower cover 4 matches with the small cylinder external diameter of upper cover 1, the bottom of cavity is provided with O-ring seal 3, and the bottom is funnel-form, and its center is provided with air intake opening and connects a pipe adapter 5-2, the cylindrical edge of lower cover 4 is provided with the screw 7 of decile, this screw 7 matches with the through hole 6 of upper cover 1, and when lower cover 4 and upper cover 1 close-fitting, the end face of filter membrane cover 2 that it is built-in compresses the O-ring seal 3 in lower cover 4.Filter membrane 11 adopts the PTFE material to make, and first the PTFE material is pulled into thread lines, and then the lines diameter becomes tracing cloth shape filter membrane 11 with the lines weaving less than 0.22um.The filter membrane 11 that the PTFE material is made can pass through gas, but can not by dust and liquid, reach the effect of blanket gas mass sensor.
Embodiment: the filter membrane cover 2 that PTFE material filter membrane 11 will be housed is placed in upper cover 1, connect lower cover 4, bolt 10 is passed the through hole 6 of upper cover 1, be screwed into the screw 7 of lower cover 4 and tighten lower cover, on the O-ring seal 3 of lower cover 4, the pipe adapter 5-2 of air intake opening connects air pump by tracheae with the port compacting of filter membrane cover 2, and the pipe adapter 5-1 of gas outlet connects sensor by tracheae, under+6Kpa pressure, steam and ponding situation can not occur at-6Kpa.After running into a large amount of steam, due to the existence of filter membrane 11, can make sensor detect vapour lock over critical value, and take safeguard measure, stop air inlet.In addition, because filter membrane 11 is removable, after using certain hour, change filter membrane 11 according to actual conditions, sensor life-time is significantly improved more than 2 times, improved the reliability of equipment and reduced failure rate.
Claims (1)
1. the anti-dust water-proof device of a gas mass flow quantity sensor, combined by upper cover, filter membrane cover, O-ring seal and lower cover, it is characterized in that: described upper cover small one and large one right cylinder for being connected, it is cavity in it, the bottom is funnel-form, the center of bottom is provided with the gas outlet and connects a pipe adapter, and the edge of described upper cover large cylinder is provided with the through hole of decile, described filter membrane cover profile is bowl-shape, at the bottom of its bowl and the rim of a bowl penetrating, filter membrane of nearly bowl end bottom place's adhesion, the lower semisection inclined-plane of described filter membrane cover and upper cover cavity funnelform bottom closely attach, the profile of described lower cover is right cylinder, it is cavity in it, the internal diameter of described lower cover matches with the small cylinder external diameter of upper cover, the bottom of cavity is provided with O-ring seal, the bottom is funnel-form, its center is provided with air intake opening and connects a pipe adapter, the cylindrical edge of described lower cover is provided with the screw of decile, this screw matches with the through hole of upper cover, when lower cover and upper cover close-fitting, the end face of the filter membrane cover that it is built-in compresses the O-ring seal in lower cover, described filter membrane adopts the PTFE material to make, first the PTFE material is pulled into thread lines, the lines diameter is less than 0.22um, then the lines weaving is become tracing cloth shape filter membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647378 CN202994230U (en) | 2012-11-30 | 2012-11-30 | Dustproof and waterproof device of gaseous mass flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647378 CN202994230U (en) | 2012-11-30 | 2012-11-30 | Dustproof and waterproof device of gaseous mass flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994230U true CN202994230U (en) | 2013-06-12 |
Family
ID=48565402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220647378 Expired - Fee Related CN202994230U (en) | 2012-11-30 | 2012-11-30 | Dustproof and waterproof device of gaseous mass flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202994230U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267146A (en) * | 2014-08-28 | 2015-01-07 | 西红柿科技（武汉）有限公司 | Gas monitoring instrument and system |
| CN104374938A (en) * | 2014-12-11 | 2015-02-25 | 哈尔滨东方报警设备开发有限公司 | Simple dustproof device for gas detector |
| CN105486376A (en) * | 2016-01-15 | 2016-04-13 | 庞极洲 | Built-in type liquid level measurement device and working method thereof |
| CN108801710A (en) * | 2017-04-28 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of ground vapour filtering buffer |
| CN109789366A (en) * | 2016-10-05 | 2019-05-21 | 霍尼韦尔国际公司 | Dust-proof and splashproof filter |
| CN112649568A (en) * | 2020-09-02 | 2021-04-13 | 煤炭科学技术研究院有限公司 | Gas sensor probe protection gas chamber |
-
2012
- 2012-11-30 CN CN 201220647378 patent/CN202994230U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267146A (en) * | 2014-08-28 | 2015-01-07 | 西红柿科技（武汉）有限公司 | Gas monitoring instrument and system |
| CN104267146B (en) * | 2014-08-28 | 2016-03-02 | 西红柿科技（武汉）有限公司 | A kind of gas monitoring instrument and system |
| CN104374938A (en) * | 2014-12-11 | 2015-02-25 | 哈尔滨东方报警设备开发有限公司 | Simple dustproof device for gas detector |
| CN105486376A (en) * | 2016-01-15 | 2016-04-13 | 庞极洲 | Built-in type liquid level measurement device and working method thereof |
| CN105486376B (en) * | 2016-01-15 | 2019-01-29 | 庞极洲 | A kind of built-in liquid level emasuring device and its working method |
| CN109764932A (en) * | 2016-01-15 | 2019-05-17 | 庞极洲 | Using the working method of the built-in liquid level emasuring device of differential pressure sensing device |
| CN109764932B (en) * | 2016-01-15 | 2020-12-08 | 庞极洲 | Working method of built-in liquid level measuring device adopting differential pressure sensing device |
| CN109789366A (en) * | 2016-10-05 | 2019-05-21 | 霍尼韦尔国际公司 | Dust-proof and splashproof filter |
| CN108801710A (en) * | 2017-04-28 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of ground vapour filtering buffer |
| CN112649568A (en) * | 2020-09-02 | 2021-04-13 | 煤炭科学技术研究院有限公司 | Gas sensor probe protection gas chamber |
| CN112649568B (en) * | 2020-09-02 | 2023-11-17 | 煤炭科学技术研究院有限公司 | Gas sensor probe protection air chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20141130 |
|
| EXPY | Termination of patent right or utility model |