CN214278064U - Waterproof dustproof gas sensor - Google Patents
Waterproof dustproof gas sensor Download PDFInfo
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- CN214278064U CN214278064U CN202022534110.XU CN202022534110U CN214278064U CN 214278064 U CN214278064 U CN 214278064U CN 202022534110 U CN202022534110 U CN 202022534110U CN 214278064 U CN214278064 U CN 214278064U
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- gas sensor
- sensing element
- dustproof
- shell
- rubber sleeve
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Abstract
The utility model relates to a waterproof dustproof gas sensor belongs to gas sensor technical field. The gas sensor mainly comprises a shell, a rear cover, a sealing ring, a circuit board, a sensing element base, a sensing element cap, a breathable layer, a sealing gasket, a dustproof breathable film and a rubber sleeve, and further comprises an encapsulating layer, the waterproof and dustproof performance of the gas sensor is improved mainly through the dustproof breathable film, the sealing ring, the sealing gasket and the encapsulating layer can further improve the sealing performance of the gas sensor, and the gas sensor can also have an explosion-proof function through the matched use of the breathable layer, the sensing element cap and the encapsulating layer. The gas sensor of the utility model can effectively prevent dust and water vapor from entering the gas sensor, thereby prolonging the service life of the gas sensor; and the gas sensor has simple structure, convenient installation and disassembly and good application prospect.
Description
Technical Field
The utility model relates to a waterproof dustproof gas sensor belongs to gas sensor technical field.
Background
Gas sensor can be in the environment of mixing impurity such as steam and dust granule for a long time when using, if the leakproofness is poor, the filter effect is not good, steam and dust get into gas sensor inside can seriously influence gas sensor's normal use, lead to gas sensor to be contaminated and influence its sensitivity, measurement accuracy and long-term stability, also can cause the damage to inside spare part simultaneously to shorten gas sensor's life, cause gas sensor failure even.
SUMMERY OF THE UTILITY MODEL
The waterproof and dustproof performance that exist to present gas sensor is not enough, the utility model provides a waterproof dustproof gas sensor through optimizing gas sensor inner structure, can make gas sensor have good waterproof and dustproof performance.
The purpose of the utility model is realized through the following technical scheme.
A waterproof and dustproof gas sensor comprises a shell, a rear cover, a sealing ring, a circuit board, a sensing element base, a sensing element cap, a breathable layer, a sealing gasket, a dustproof and breathable film and a rubber sleeve;
a cavity matched with the rubber sleeve is processed in the shell; the shell is also provided with a wire passing hole;
the sensing element cap and the rubber sleeve are of hollow structures with two open ends;
the circuit board is positioned between the shell and the rear cover, and the shell is fixedly connected with the rear cover; one end of the pin is connected with the circuit board, the pin penetrates through the base of the sensing element, and the other end of the pin is connected with the sensing element; one end face of the sensing element cap is in contact with the sensing element base, the sensing element is positioned in the cavity of the sensing element cap, and the other end face of the sensing element cap is sequentially provided with the ventilating layer, the sealing gasket and the dustproof and breathable film; the rubber sleeve is positioned in the cavity of the shell, one end face of the rubber sleeve is in contact with the inner surface of the cavity, the other end face of the rubber sleeve is in contact with the circuit board, and the sensing element cap, the breathable layer, the sealing pad and the dustproof breathable film are all positioned in the cavity of the rubber sleeve; the sealing ring is arranged in the wire passing hole of the shell.
Furthermore, the gas sensor also comprises a glue filling layer which is filled in gaps between the back cover and the circuit board and between the circuit board and the inner surface of the shell to completely cover the circuit board, so that the sealing performance of the gas sensor can be improved to a certain degree, and the gas sensor is more effectively prevented from being short-circuited or damaged due to the fact that water vapor or dust enters the shell; the material of the glue filling layer can be epoxy resin.
Furthermore, the dustproof breathable film is made of a polytetrafluoroethylene polymer film, and the protection grade can reach IP 67.
Furthermore, the sensing element cap and the rubber sleeve are hollow cylinders with two open ends, correspondingly, a cylindrical cavity matched with the rubber sleeve is processed in the shell, the internal space of the gas sensor can be reasonably utilized, and the reduction of the size is facilitated.
Further, when involving hazardous gas, the material of sensing element cap chooses for use the stainless steel, and the material on ventilative layer chooses for use stainless steel powder metallurgy piece, combines encapsulating layer structure, and the encapsulating layer covers the thickness of circuit board more than 2.5mm this moment, not only has better filtering action, and has explosion-proof function.
Further, considering that the material of the sensing element of the gas sensor contains a noble metal, the material of the seal ring, the gasket, and the rubber sleeve is preferably ethylene propylene diene monomer or nitrile rubber which does not contain silicon and sulfur.
Has the advantages that:
the gas sensor of the utility model can improve the waterproof and dustproof effects of the gas sensor by matching the sensing element cap, the breathable layer, the sealing pad and the dustproof and breathable film; the glue layer is filled in the gas sensor, so that the waterproof and dustproof effects of the gas sensor can be further improved; in addition, the stainless steel sensing element cap and the stainless steel powder metallurgy sheet ventilation layer are matched, and the glue pouring layer structure is combined, so that the stainless steel sensing element cap has a good filtering effect and also has good explosion-proof performance.
Drawings
Fig. 1 is an exploded view of the gas sensor described in example 1.
Fig. 2 is a schematic structural view of the sensor module described in embodiment 1.
Fig. 3 is a sectional view of the gas sensor described in embodiment 1.
The sensor comprises a shell, a sensing element assembly, a circuit board, a sensing element base, a sensing element cap, a sensing element cover, a ventilation layer, a sealing gasket, a dustproof and breathable film, a rubber sleeve, a rear cover, a 4-wire through hole, a sealing ring, a 6-bolt hole and a 7-glue filling layer, wherein the shell is 1, the sensing element assembly is 2, the circuit board is 21, the sensing element base is 22, the sensing element cap is 23, the ventilation layer is 24, the sealing gasket is 25, the dustproof and breathable film is 26, the rubber sleeve is 27, the rear cover is 3, the 4-wire through hole is 5, the sealing ring is 6, and the bolt hole is 7.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein the process is conventional unless otherwise specified, and the starting materials are commercially available from the public without further specification.
Example 1
A waterproof and dustproof gas sensor comprises a shell 1, a sensing element assembly 2, a rear cover 3, a sealing ring 5 and a glue filling layer 7;
a cylindrical cavity matched with the rubber sleeve 27 is processed inside the shell 1; a wire passing hole 4 is processed on the side wall of the shell 1, and a threaded hole 6 is processed on the end face of the shell 1, as shown in fig. 1;
the sensing element assembly 2 comprises a circuit board 21, a sensing element base 22, a sensing element cap 23, a gas permeable layer 24, a sealing gasket 25, a dust-proof gas-permeable membrane 26 and a rubber sleeve 27, as shown in fig. 2; the sensing element cap 23 and the rubber sleeve 27 are hollow cylinders with two open ends, the sensing element cap 23 is made of stainless steel, the breathable layer 24 is made of stainless steel powder metallurgy, breathable holes are formed in the breathable layer 24 to allow air to pass through, the dustproof breathable film 26 is made of a polytetrafluoroethylene polymer film, and the sealing ring 5, the sealing gasket 25 and the rubber sleeve 27 are made of ethylene propylene diene monomer or nitrile rubber which does not contain silicon and sulfur;
the material of the encapsulating layer 7 is epoxy resin, and the thickness of the encapsulating layer is about 2.7 mm;
the lower end of the pin is connected with the upper end face of the circuit board 21, the pin penetrates through the sensing element base 22, and the upper end of the pin is connected with the sensing element; the lower end face of the sensing element cap 23 is in contact with the sensing element base 22, the sensing element is positioned in the cavity of the sensing element cap 23, and the upper end face of the sensing element cap 23 is sequentially provided with a sealing breathable layer 24, a sealing gasket 25 and a dustproof breathable film 26; the rubber sleeve 27 is sleeved outside the sensing element base 22, the breathable layer 24, the sealing pad 25 and the dustproof breathable film 26 are all positioned in a cavity of the rubber sleeve 27, and the lower end face of the rubber sleeve 27 is in contact with the circuit board 21; the sensing element assembly 2 is positioned between the shell 1 and the rear cover 3, the rubber sleeve 27 of the sensing element assembly 2 is positioned in the cavity of the shell 1, the upper end face of the rubber sleeve 27 is in contact with the inner surface of the cavity of the shell 1, and the shell 1 is in threaded connection with the rear cover 3; the sealing ring 5 is arranged in the wire passing hole 4 of the shell 1, and the sealing ring 5 and the wire passing hole 4 can be tightly matched through extrusion, so that the waterproof and dustproof effects of the gas sensor are improved; the glue filling layer 7 is filled in gaps between the rear cover 3 and the circuit board 21 and between the circuit board 21 and the inner surface of the shell to completely cover the circuit board 21, so that the tightness of the gas sensor can be improved to a certain degree, and the gas sensor is prevented from being short-circuited or damaged due to the fact that water vapor or dust enters the shell more effectively.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (7)
1. The utility model provides a waterproof dustproof gas sensor which characterized in that: the gas sensor comprises a shell, a rear cover, a sealing ring, a circuit board, a sensing element base, a sensing element cap, a breathable layer, a sealing gasket, a dustproof breathable film and a rubber sleeve;
a cavity matched with the rubber sleeve is processed in the shell; the shell is also provided with a wire passing hole;
the sensing element cap and the rubber sleeve are of hollow structures with two open ends;
the circuit board is positioned between the shell and the rear cover, and the shell is fixedly connected with the rear cover; one end of the pin is connected with the circuit board, the pin penetrates through the base of the sensing element, and the other end of the pin is connected with the sensing element; one end face of the sensing element cap is in contact with the sensing element base, the sensing element is positioned in the cavity of the sensing element cap, and the other end face of the sensing element cap is sequentially provided with the ventilating layer, the sealing gasket and the dustproof and breathable film; the rubber sleeve is positioned in the cavity of the shell, one end face of the rubber sleeve is in contact with the inner surface of the cavity, the other end face of the rubber sleeve is in contact with the circuit board, and the sensing element cap, the breathable layer, the sealing pad and the dustproof breathable film are all positioned in the cavity of the rubber sleeve; the sealing ring is arranged in the wire passing hole of the shell.
2. The waterproof and dustproof gas sensor according to claim 1, wherein: the gas sensor also comprises a glue pouring layer, and the glue pouring layer is filled in gaps between the rear cover and the circuit board and between the circuit board and the inner surface of the shell.
3. The waterproof and dustproof gas sensor according to claim 2, characterized in that: the material of the glue filling layer is epoxy resin.
4. The waterproof and dustproof gas sensor according to claim 1, wherein: the dustproof breathable film is a polytetrafluoroethylene polymeric film.
5. The waterproof and dustproof gas sensor according to claim 1, wherein: the sensing element cap and the rubber sleeve are hollow cylinders with two open ends, and correspondingly, a cylindrical cavity matched with the rubber sleeve is processed in the shell.
6. The waterproof and dustproof gas sensor according to claim 2, characterized in that: the material of sensing element cap chooses the stainless steel for use, and the material of ventilative layer chooses stainless steel powder metallurgy piece for use, and the thickness of encapsulating layer is more than 2.5 mm.
7. The waterproof and dustproof gas sensor according to claim 1, wherein: the sealing ring, the sealing gasket and the rubber sleeve are made of ethylene propylene diene monomer or nitrile rubber which does not contain silicon and sulfur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022534110.XU CN214278064U (en) | 2020-11-05 | 2020-11-05 | Waterproof dustproof gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022534110.XU CN214278064U (en) | 2020-11-05 | 2020-11-05 | Waterproof dustproof gas sensor |
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| Publication Number | Publication Date |
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| CN214278064U true CN214278064U (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022534110.XU Active CN214278064U (en) | 2020-11-05 | 2020-11-05 | Waterproof dustproof gas sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230056986A (en) * | 2021-10-21 | 2023-04-28 | 한양대학교 에리카산학협력단 | Waterproof and dustproof device for environmental sensor module |
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2020
- 2020-11-05 CN CN202022534110.XU patent/CN214278064U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230056986A (en) * | 2021-10-21 | 2023-04-28 | 한양대학교 에리카산학협력단 | Waterproof and dustproof device for environmental sensor module |
| KR102641790B1 (en) * | 2021-10-21 | 2024-02-27 | 한양대학교 에리카산학협력단 | Waterproof and dustproof device for environmental sensor module |
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