CN209878652U - Electrochemical gas sensor suitable for severe working condition environment - Google Patents
Electrochemical gas sensor suitable for severe working condition environment Download PDFInfo
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- CN209878652U CN209878652U CN201920495745.8U CN201920495745U CN209878652U CN 209878652 U CN209878652 U CN 209878652U CN 201920495745 U CN201920495745 U CN 201920495745U CN 209878652 U CN209878652 U CN 209878652U
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Abstract
The utility model discloses an adapt to electrochemical gas sensor under abominable operating mode environment, electrochemical gas sensor includes: the gas detection device comprises an opening shell, a gas detection unit is arranged in the opening shell, a plurality of pins are arranged at the bottom of the opening shell, and a lead is welded on each pin; the shell cover is detachably connected with the opening shell in a sealing manner; and each sealing vibration-stopping sheet is fixed in the opening shell in an ultrasonic welding mode and seals a corresponding pin and a welding point of the lead. The utility model discloses can normally work under the adverse circumstances of big difference in temperature, big humidity and strong corrosivity to bear high temperature impact in the short time, when the contact is not higher than 85 ℃ in half an hour, to the wholeness ability not damaged of sensor, still can normally work.
Description
Technical Field
The utility model relates to an electrochemistry gas sensor, concretely relates to adaptation electrochemistry gas sensor under the abominable operating mode environment.
Background
Gas sensors based on electrochemical principles are generally used for detecting toxic and harmful gases such as carbon monoxide, hydrogen sulfide, hydrogen, ammonia and the like. In the prior patent CN200710054429, a method for protecting a welding point of a gas sensor is disclosed, in which an epoxy resin is used for sealing the welding point of a pin and a lead, but the epoxy resin fails at a low temperature, and such a sensor cannot be used in a severe environment with a large temperature difference, a large humidity and strong corrosiveness. In an electrolyte sealing mode, an O-shaped ring is used for sealing in a patent CN102013000094268, and a lead wire leading-out mode is used in a patent CN201320478367, but the sensor manufactured by the method fails in severe environments with large temperature difference, large humidity and strong corrosiveness. In the selection of materials, the existing electrochemical gas sensor mostly adopts ABS materials, and the materials have serious thermal expansion and cold contraction under the environment with large temperature difference, can cause structural failure, and can not work normally under the severe environment with large temperature difference, large humidity and strong corrosivity.
At present, most of electrochemical gas sensors have the index working temperature range of-20 ℃ to 50 ℃, and have certain requirements on humidity and corrosion resistance. When a temperature range or a temperature abrupt change or a high humidity or highly corrosive environment is exceeded, the sensor may fail, particularly in that the electrolyte leaks, resulting in a great decrease in sensitivity, depending on the material, structure and manufacturing process of the sensor. Therefore, the electrochemical gas sensor cannot be used in a severe environment with large temperature difference, large humidity and strong corrosiveness. Thus, the use of the electrochemical gas sensor has limitations.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an solve above-mentioned problem to a adapt to electrochemical gas sensor under the abominable operating mode environment is provided.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
an electrochemical gas sensor adapted to harsh operating environment, said electrochemical gas sensor comprising:
the gas detection device comprises an opening shell, a gas detection unit is arranged in the opening shell, a plurality of pins are arranged at the bottom of the opening shell, and a lead is welded on each pin;
the shell cover is detachably connected with the opening shell in a sealing manner;
and each sealing vibration-stopping sheet is fixed in the opening shell in an ultrasonic welding mode and seals a corresponding pin and a welding point of the lead.
In a preferred embodiment of the present invention, the gas detection unit includes a working electrode, a reference electrode, and a counter electrode that are ion-conducted through an electrolyte.
In a preferred embodiment of the present invention, the housing cover is provided with air holes.
In a preferred embodiment of the present invention, the opening housing and the housing cover are made of a material having a small coefficient of thermal expansion and contraction.
In a preferred embodiment of the present invention, the open casing and the cover are made of PPS polyphenylene sulfide as a material of the structural body.
The utility model has the advantages that:
the utility model discloses can normally work under the adverse circumstances of big difference in temperature, big humidity and strong corrosivity to bear high temperature impact in the short time, when the contact is not higher than 85 ℃ in half an hour, to the wholeness ability not damaged of sensor, still can normally work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, the present invention provides an electrochemical gas sensor adapted to severe working environment, which comprises an opening casing 100, a casing cover 200 and a plurality of sealing vibration-stopping pieces 300.
The housing cover 200 is detachably and hermetically connected to the open housing 100, specifically, a housing cover clamping groove may be disposed on the open housing 100, and a sealing connection end 210 is disposed at the bottom of the housing cover 200, and the sealing connection end 210 may be inserted into the housing cover clamping groove.
In addition, the cap 200 and the open-top case 100 may be connected by pressing teflon, so that the electrolyte in the open-top case 100 may be partially sealed, thereby further improving the sealing performance.
The cover 200 is provided with air holes 220 for ventilation.
An open housing slot 110 is provided in the open housing 100, and the gas detection unit is disposed above the housing slot 110.
The gas detection unit is used for detecting gas and specifically comprises a working electrode 410, a reference electrode 420 and a counter electrode 430 which are in ion conduction through an electrolyte 440.
Working electrode 410 is positioned between housing cover 200 and open housing pocket 110, and reference electrode 420 and counter electrode 430 are positioned between working electrode 410 and open housing pocket 110.
A plurality of pins 500 are arranged at the bottom of the open casing 100, each pin 500 is welded with a lead, and the pins 500 are respectively connected with the working electrode 410, the reference electrode 420 and the counter electrode 430 through the leads.
In addition, a plurality of grooves 120 are further arranged at the bottom of the open shell 100, each groove 120 is correspondingly matched with one pin 500, and the welding point 510 of each pin 500 and the lead is just positioned in the corresponding groove 120.
The sealing vibration-damping sheet 300 is specifically T-shaped, and may be inserted into the groove 120 and fixed in the groove 120 by ultrasonic welding, so that the pin 500 located in the groove 120 and the welding point 510 of the lead may be sealed.
Like this, seal up pin 500 and the welding point of lead wire through foretell seal structure for this application can be big at the difference in temperature, humidity is big and the aggressive environment under normal work, and tolerates high temperature impact in the short time, when the contact is not higher than 85 ℃ temperature in half an hour, to the wholeness ability not damaged of sensor, still can normally work.
In addition, the open-top case 100 and the case cover 200 are both made of a material with a small coefficient of thermal expansion and cold contraction, specifically, PPS polyphenylene sulfide is used as a structural material, so that the high-temperature impact resistance of the present application can be further improved.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An electrochemical gas sensor adapted to harsh operating conditions, said electrochemical gas sensor comprising:
the gas detection device comprises an opening shell, a gas detection unit is arranged in the opening shell, a plurality of pins are arranged at the bottom of the opening shell, and a lead is welded on each pin;
the shell cover is detachably connected with the opening shell in a sealing manner;
and each sealing vibration-stopping sheet is fixed in the opening shell in an ultrasonic welding mode and seals a corresponding pin and a welding point of the lead.
2. The electrochemical gas sensor adapted to severe working environment of claim 1, wherein the gas detection unit comprises a working electrode, a reference electrode and a counter electrode which are ion-conductive through an electrolyte.
3. The electrochemical gas sensor according to claim 1, wherein the housing cover has air holes.
4. The electrochemical gas sensor according to claim 1, wherein the open casing and the cover are made of a material with a small coefficient of thermal expansion and contraction.
5. The electrochemical gas sensor according to claim 4, wherein the open casing and the cover are made of PPS polyphenylene sulfide as a structural material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920495745.8U CN209878652U (en) | 2019-04-12 | 2019-04-12 | Electrochemical gas sensor suitable for severe working condition environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920495745.8U CN209878652U (en) | 2019-04-12 | 2019-04-12 | Electrochemical gas sensor suitable for severe working condition environment |
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| Publication Number | Publication Date |
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| CN209878652U true CN209878652U (en) | 2019-12-31 |
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| CN201920495745.8U Active CN209878652U (en) | 2019-04-12 | 2019-04-12 | Electrochemical gas sensor suitable for severe working condition environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948270A (en) * | 2020-07-29 | 2020-11-17 | 张旭 | Dangerous gas alarm used under high-temperature severe working condition |
| CN114428111A (en) * | 2021-12-13 | 2022-05-03 | 中国石油化工股份有限公司 | Pulsed eddy current detection sensor shell |
-
2019
- 2019-04-12 CN CN201920495745.8U patent/CN209878652U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948270A (en) * | 2020-07-29 | 2020-11-17 | 张旭 | Dangerous gas alarm used under high-temperature severe working condition |
| CN114428111A (en) * | 2021-12-13 | 2022-05-03 | 中国石油化工股份有限公司 | Pulsed eddy current detection sensor shell |
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