CN111638248A - High-temperature-resistant gas sensor and packaging method thereof - Google Patents
High-temperature-resistant gas sensor and packaging method thereof Download PDFInfo
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- CN111638248A CN111638248A CN202010635368.0A CN202010635368A CN111638248A CN 111638248 A CN111638248 A CN 111638248A CN 202010635368 A CN202010635368 A CN 202010635368A CN 111638248 A CN111638248 A CN 111638248A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 18
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 35
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 229910052573 porcelain Inorganic materials 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 34
- 239000000463 material Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012625 in-situ measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
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Abstract
The invention relates to the technical field of gas sensors, in particular to a high-temperature-resistant gas sensor and a packaging method thereof. The sensor includes sensor original paper and sleeve pipe, and the sensor original paper is arranged in the sleeve pipe, and the sensor original paper includes sense terminal and electrode end, and the sense terminal of sensor original paper is used for gaseous detection, and the electrode end of sensor original paper is connected with the wire, and the inside first cavity and the second cavity of being equipped with of sleeve pipe, the first cavity internal fixation has the lead wire device, and the electrode end and the lead wire device butt joint of sensor original paper, the wire that the electrode end is connected are drawn forth from the lead wire device in, and the second cavity is used for placing the sensor original paper, still is equipped with ceramic cake and ceramic clamping ring in the second cavity, and the ceramic clamping ring is fixed the electrode end of sensor original paper in the second cavity, and the ceramic clamping ring is fixed the sense terminal. The invention can realize the fixation, heat insulation and sealing of the sensor element, has better high temperature resistance and can be used in high temperature environment.
Description
Technical Field
The invention relates to the technical field of gas sensors, in particular to a high-temperature-resistant gas sensor and a packaging method thereof.
Background
A gas sensor is a device that converts information such as the composition and concentration of a gas into an electric signal that can be used by a person, an instrument, a computer, or the like. The basic characteristics of a gas sensor, i.e., sensitivity, selectivity, stability, etc., are determined primarily by the choice of materials. The sensitivity of the gas sensor can be optimized by selecting proper materials and developing new materials.
Existing gas sensors, such as zirconia sensor elements for gas analysis, typically employ a rubber member as a seal at the electrode end, and lead wires are led out through the rubber member. Since the heat resistance of the rubber part is generally poor, the rubber part is easy to melt and deform at high temperature or is degraded by long-term thermal radiation, so that the sealing performance of the sensor is poor, and the basic characteristics of the gas sensor are affected. The prior art generally adopts a heat insulation device between the rubber piece and the sensor element to solve the problem, but the temperature resistance of the whole sensor is not improved, and the application of the sensor in a high-temperature environment is limited. The environmental temperature of the smoke emission of natural gas boilers and the like is usually over 120 ℃, and for the high-temperature environment, the ordinary sensor adopting the rubber piece cannot carry out in-situ measurement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-temperature-resistant gas sensor and a packaging method thereof, and when the high-temperature-resistant gas sensor is applied, the sensor element can be fixed, insulated and sealed, and the high-temperature-resistant gas sensor has better high-temperature-resistant characteristic and can be used in a high-temperature environment.
The technical scheme adopted by the invention is as follows:
the utility model provides a high temperature resistant gas sensor and packaging method thereof, includes sensor original paper and sleeve pipe, and the sensor original paper is arranged in the sleeve pipe, the sensor original paper includes sense terminal and electrode end, and the sense terminal of sensor original paper is used for gaseous detection, and the electrode end of sensor original paper is connected with the wire, inside first cavity and the second cavity of being equipped with of sleeve pipe, be fixed with the lead wire device in the first cavity, the electrode end and the lead wire device butt joint of sensor original paper, the wire that the electrode end is connected is drawn from the lead wire device, the second cavity is used for placing the sensor original paper, still is equipped with ceramic cake and pottery clamping ring in the second cavity, the electrode end of sensor original paper is fixed in the second cavity to the ceramic clamping ring, the detection end of sensor original paper is fixed in the second cavity.
Preferably, the lead device is a cylinder, a position of the lead device, which is in butt joint with the electrode end of the sensor element, is provided with a limiting groove, the electrode end of the sensor element is fixed in the limiting groove, a wire passing hole penetrates through the inside of the lead device along the axial direction, and the lead is led out from the wire passing hole.
Preferably, the diameter of the second cavity is larger than that of the first cavity, the outer wall of one end, provided with the limiting groove, of the lead device is provided with a first boss and a second boss, a groove is formed between the first boss and the second boss, the ends, where the first boss and the second boss are, of the lead device are clamped in the second cavity and fixed through a porcelain cake, and the other end of the lead device is fixed in the first cavity.
Preferably, the outer wall of the end part of the sleeve at one end of the first cavity is provided with a connecting thread.
Preferably, the sleeve is provided with air holes in the outer wall of the end portion at one end of the second cavity, the end portion of the second cavity, which is located at the detection end of the sensor element, is provided with an air filtering device, the air filtering device is a cup-shaped body, the opening end of the air filtering device faces the detection end of the sensor element, the detection end of the sensor element is covered in the second cavity, and the air holes in the sleeve are opposite to the air filtering device.
Preferably, a sealing device is arranged outside the gas filtering device, and the sealing device fixes the gas filtering device at the end part of the second cavity.
Preferably as above-mentioned technical scheme, ceramic clamping ring is equipped with two, and one of them is established the electrode end at the sensor original paper extrusion with the ceramic cake, and another is established and is close to the terminal position of sensor original paper sense terminal in the second cavity, and with the gas filtration device contact, carry on spacingly to the gas filtration device.
Preferably, in the technical scheme, the ceramic cake is a cake-shaped body formed by pressing ceramic powder, the ceramic pressure ring is made of ceramic materials, and the lead device is made of ceramic or corundum.
Preferably, the lead is a silver wire with a diameter of 0.8mm, and is welded to the electrode end of the sensor element.
The packaging method of the high-temperature-resistant gas sensor comprises the following steps:
s1, welding a lead at the electrode end of the sensor element, butting the electrode end of the sensor element with a lead device, and leading out the welded lead from the lead device;
s2, placing the sensor element and the lead device into a sleeve, fixing the lead device in the first cavity, and placing the sensor element in the second cavity;
s3, sleeving a plurality of ceramic cakes on the periphery of the sensor element in the second cavity, and then sleeving the ceramic cakes into a ceramic pressure ring;
s4, applying pressure to the ceramic pressure ring along the direction from the detection end to the electrode end of the sensor element to enable the ceramic pressure ring to extrude a ceramic cake, filling the peripheral space of the electrode end of the sensor element after the ceramic cake is crushed, and fixing the electrode end of the sensor element;
s5, sleeving a ceramic compression ring on the periphery of the detection end of the sensor original, fixing the tail end of the detection end of the sensor original, arranging a gas filtering device at the end part of the detection end of the sensor original in the second cavity, enabling the gas filtering device to abut against the ceramic compression ring to cover the detection end of the sensor original in the second cavity, and finally arranging a sealing device outside the gas filtering device to enable the sealing device to fix the gas filtering device at the end part of the second cavity.
The invention has the beneficial effects that:
the high-temperature resistant material is arranged, so that the sensor is high in integral temperature resistance and can integrally work in high-temperature environments such as smoke; the ceramic material contacted with the sensor element has good heat insulation and insulation effects, can not only electrically insulate the electrode of the sensor element and the lead, but also avoid the temperature change of the sensor caused by the contact of the sensor element and the sleeve pipe to influence the testing precision; the cake-shaped porcelain cake pressed by adopting the ceramic powder is convenient to store and press the ceramic powder into each gap by using a press; the cost is low, the manufacture is simple, and the realization is easy.
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 the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the construction of the bushing of the present invention;
FIG. 3 is a schematic view of a lead device according to the present invention;
FIG. 4 is a schematic view of the structure of the porcelain cake of the present invention;
FIG. 5 is a schematic view of a ceramic pressure ring structure according to the present invention;
FIG. 6 is a schematic view of the structure of the filter device of the present invention;
fig. 7 is a schematic view of the sealing device of the present invention with different viewing angles.
In the figure: 1. a sensor element; 2. a wire-guiding device; 201. a limiting groove; 202. a wire passing hole; 203. a first boss; 204. a groove; 205. a second boss; 3. a sleeve; 301. connecting threads; 302. air holes are formed; 303. a filtration device; 304. a sealing device; 305. a first cavity; 306. a second cavity; 4. a wire; 5. a ceramic pressure ring; 6. a porcelain cake.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", and the like, refer to an orientation or positional relationship that is conventionally used for placing the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present invention.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example 1:
the present embodiment provides a high temperature resistant gas sensor, as shown in fig. 1 to 5, comprising a sensor element 1 and a sleeve 3, the sensor element 1 being disposed in the sleeve 3, the sensor element 1 comprises a detection end and an electrode end, the detection end of the sensor element 1 is used for gas detection, the electrode end of the sensor element 1 is connected with a lead 4, a first cavity 305 and a second cavity 306 are arranged in the sleeve 3, a lead device 2 is fixed in the first cavity 305, an electrode end of the sensor element 1 is in butt joint with the lead device 2, a lead 4 connected with the electrode end is led out from the lead device 2, the second cavity 306 is used for placing the sensor element 1, a ceramic cake 6 and a ceramic pressure ring 5 are also arranged in the second cavity 306, the electrode end of the sensor element 1 is fixed in the second cavity 306 by the ceramic cake 6, the ceramic press ring 5 fixes the detection end of the sensor element 1 in the second cavity 306. The ceramic cake 6 is a cake-shaped body pressed by ceramic powder, the ceramic pressure ring 5 is made of ceramic material, and the lead device 2 is made of ceramic or corundum. The wire is silver wire, and the diameter is 0.8mm, and it passes through silver-colored soldering with the electrode end of sensor element 1 and welds. The outer wall of the end part of the sleeve 3 at one end of the first cavity 305 is provided with a connecting thread 301, and the connecting thread 301 can be connected with other auxiliary instruments such as a metal probe rod, so as to adjust the depth of the sensor inserted into the measured environment. The sleeve 3 can be made of stainless steel materials, and has high heat resistance and long service life.
When the sensor element fixing, heat insulation and sealing device is applied, the sensor element 1 is fixed, insulated and sealed, high temperature above 500 ℃ can be resisted, the problem that the sensor cannot be used for in-situ measurement in high-temperature environments such as flue gas and the like is solved, and meanwhile, the ceramic material in contact with the sensor element has good heat insulation and insulation effects, so that the sensor element fixing, heat insulation and sealing device can be used for electrically insulating electrodes and leads of the sensor element, and can prevent the sensor element from being in contact with a sleeve to cause temperature change of the sensor and influence on test precision.
Example 2:
as an optimization of the above embodiment, the lead device 2 is a cylinder, a position of the lead device, which is in butt joint with the electrode end of the sensor element 1, is provided with a limiting groove 201, the electrode end of the sensor element 1 is fixed in the limiting groove 201, a wire passing hole 202 axially penetrates through the inside of the lead device 2, and the lead wire 4 is led out from the wire passing hole 202. The size of the limiting groove 201 can be slightly larger than the electrode end of the sensor element 1, so that the end head of the electrode end of the sensor element 1 is just placed in the limiting groove 201; the wire through holes 202 are arranged on two sides or the periphery of the limiting groove 201, the aperture of each wire through hole is slightly larger than the diameter of the lead 4, the number of the wire through holes 202 is the same as that of the electrodes of the sensor element 1, and for convenience of use, 6 wire through holes 202 can be arranged and are respectively arranged on two sides of the limiting groove 201.
The diameter of the second cavity 306 is larger than that of the first cavity 305, the outer wall of one end, provided with the limiting groove 201, of the lead device 2 is provided with a first boss 203 and a second boss 205, a groove 204 is formed between the first boss 203 and the second boss 205, the ends, where the first boss 203 and the second boss 205 are, of the lead device 2 are clamped in the second cavity 306 and fixed through the porcelain cake 6, and the other end of the lead device is fixed in the first cavity 305. The arrangement of the first boss 203, the second boss 205 and the groove 204 facilitates the filling of the porcelain cake 6 in the groove 204, resulting in an efficient fixing of the lead frame 2.
Example 3:
as an optimization of the above embodiment, as shown in fig. 6 to 7, an air hole 302 is formed in an outer wall of an end portion of the sleeve 3 located at one end of the second cavity 306, an air filtering device 303 is arranged at an end portion of the second cavity 306 located at the detection end of the sensor element 1, the air filtering device 303 is a cup-shaped body, an open end of the cup-shaped body faces the detection end of the sensor element 1, the detection end of the sensor element 1 is covered in the second cavity 306, and the air hole 302 on the sleeve 3 faces the air filtering device 303. The gas filter 303 is externally provided with a closure 304, and the closure 304 secures the gas filter 303 to the end of the second cavity 306. Ceramic clamping ring 5 is equipped with two, and one of them is established the electrode end at sensor original paper 1 with the extrusion of ceramic cake 6, and another is established in second cavity 306 near the terminal position of sensor original paper 1 sense terminal, contacts with gas filtering device 303, carries on spacingly to gas filtering device 303. When its application, the air that waits to detect can follow bleeder vent 302 and get into, reaches the sense terminal of sensor original paper 1 after gas filter 303 filters and detects, sets up ceramic clamping ring 5 in the position that is close to sensor original paper 1 sense terminal, can prevent that the sense terminal of air current impact sensor original paper 1 from making it the vibration fracture in high temperature environment when too big, plays the fixed guard action of efficient.
Example 4:
as an optimization of the above embodiments, the present embodiment provides a packaging method of a high temperature resistant gas sensor, including the following steps:
s1, welding the lead 4 at the electrode end of the sensor element 1, butting the electrode end of the sensor element 1 with the limiting groove 201 of the lead device 2, and leading the welded lead 4 out of the lead hole 202 of the lead device 2;
s2, placing the sensor element 1 and the lead device 2 into the sleeve 3, so that the lead device 2 is fixed in the first cavity 305, the first boss 203, the second boss 205 and the groove 204 are partially disposed in the second cavity 306, and the sensor element 1 is disposed in the second cavity 306;
s3, sleeving a plurality of ceramic cakes 6 on the periphery of the sensor element 1 in the second cavity 306, and then sleeving a ceramic pressure ring 5;
s4, applying pressure to the ceramic compression ring 5 along the direction from the detection end to the electrode end of the sensor element 1 to enable the ceramic compression ring 5 to extrude a ceramic cake 6, wherein the ceramic cake 6 is filled in the grooves of the wire passing holes 202 and 204, the gap between the lead device 2 and the sleeve 3 and the gap between the electrode end of the sensor element 1 and the sleeve 3 after being extruded, and the quantity of the ceramic cakes 6 put in must ensure that the ceramic compression ring 5 cannot be contacted with the electrode end of the sensor element 1, otherwise, the electrode end of the sensor element 1 may be damaged in the extrusion process;
s5, sleeving a ceramic compression ring 5 on the periphery of the detection end of the sensor original 1, fixing the tail end of the detection end of the sensor original 1, arranging a gas filtering device 303 at the end part of the detection end of the sensor original 1 in the second cavity 306, enabling the gas filtering device 303 to abut against the ceramic compression ring 5 to cover the detection end of the sensor original 1 in the second cavity 306, and finally arranging a sealing device 304 outside the gas filtering device 303 to enable the sealing device 304 to fix the gas filtering device 303 at the end part of the second cavity 306; the sealing device 304 ensures that the filtering device 303 does not fall off in a riveting and closing mode, and the sealing device 304 can be fixed at the tail end of the second cavity 306 in a threaded connection or welding mode to prevent the filtering device 303 from falling off.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (10)
1. A high temperature resistant gas sensor, characterized by: including sensor original paper (1) and sleeve pipe (3), sensor original paper (1) is arranged in sleeve pipe (3), sensor original paper (1) is including sense terminal and electrode end, and the sense terminal of sensor original paper (1) is used for gaseous detection, and the electrode end of sensor original paper (1) is connected with wire (4), inside first cavity (305) and the second cavity (306) of being equipped with of sleeve pipe (3), first cavity (305) internal fixation has lead wire device (2), and the electrode end and the lead wire device (2) butt joint of sensor original paper (1), wire (4) that the electrode end is connected are drawn forth in lead wire device (2), second cavity (306) are used for placing sensor original paper (1), still are equipped with ceramic cake (6) and ceramic clamping ring (5) in second cavity (306), ceramic cake (6) are fixed the electrode end of sensor original paper (1) in second cavity (306), and the ceramic pressure ring (5) fixes the detection end of the sensor original (1) in the second cavity (306).
2. The high temperature resistant gas sensor of claim 1, wherein: the lead device (2) is a cylinder, a limiting groove (201) is formed in the butt joint position of the lead device and the electrode end of the sensor element (1), the electrode end of the sensor element (1) is fixed in the limiting groove (201), a wire passing hole (202) penetrates through the interior of the lead device (2) along the axial direction, and a lead (4) is led out from the wire passing hole (202).
3. The high temperature resistant gas sensor of claim 2, wherein: the diameter of the second cavity (306) is larger than that of the first cavity (305), the outer wall of one end, provided with a limiting groove (201), of the lead device (2) is provided with a first boss (203) and a second boss (205), a groove (204) is formed between the first boss (203) and the second boss (205), the end, where the first boss (203) and the second boss (205) of the lead device (2) are located, of the lead device is clamped in the second cavity (306) and fixed through a porcelain cake (6), and the other end of the lead device is fixed in the first cavity (305).
4. The high temperature resistant gas sensor of claim 1, wherein: and a connecting thread (301) is arranged on the outer wall of the end part of the sleeve (3) positioned at one end of the first cavity (305).
5. The high temperature resistant gas sensor of claim 1, wherein: be equipped with bleeder vent (302) on the tip outer wall that is located second cavity (306) one end on sleeve pipe (3), the tip that is located sensor original paper (1) sense terminal in second cavity (306) is equipped with gas filtering device (303), gas filtering device (303) are the cup-shaped body, its open end is towards the sense terminal of sensor original paper (1), cover the sense terminal cage of sensor original paper (1) in second cavity (306), bleeder vent (302) on sleeve pipe (3) are just to gas filtering device (303).
6. The high temperature resistant gas sensor of claim 5, wherein: and a sealing device (304) is arranged outside the gas filtering device (303), and the sealing device (304) fixes the gas filtering device (303) at the end part of the second cavity (306).
7. The high temperature resistant gas sensor of claim 5, wherein: ceramic clamping ring (5) are equipped with two, and one of them is established porcelain cake (6) extrusion and is fixed the electrode end in sensor original paper (1), and another is established and is close to the terminal position of sensor original paper (1) sense terminal in second cavity (306), and with gas filtering device (303) contact, carry on spacingly to gas filtering device (303).
8. The high temperature resistant gas sensor of claim 1, wherein: the ceramic cake (6) is a cake-shaped body pressed by ceramic powder, the ceramic pressure ring (5) is made of ceramic material, and the lead device (2) is made of ceramic or corundum.
9. The high temperature resistant gas sensor of claim 1, wherein: the wire is silver wire, and the diameter is 0.8mm, and it welds with the electrode tip of sensor original paper (1).
10. The high temperature resistant gas sensor according to any one of claims 1 to 9, providing a packaging method of the high temperature resistant gas sensor, comprising the steps of:
s1, welding the lead (4) at the electrode end of the sensor element (1), butting the electrode end of the sensor element (1) with the lead device (2), and leading out the welded lead (4) from the lead device (2);
s2, placing the sensor element (1) and the lead device (2) into the sleeve (3), fixing the lead device (2) in the first cavity (305), and placing the sensor element (1) in the second cavity (306);
s3, sleeving a plurality of porcelain cakes (6) on the periphery of the sensor element (1) in the second cavity (306), and then sleeving a ceramic pressure ring (5);
s4, applying pressure to the ceramic compression ring (5) along the direction from the detection end to the electrode end of the sensor original (1), enabling the ceramic compression ring (5) to extrude a ceramic cake (6), filling the ceramic cake (6) into the peripheral space of the electrode end of the sensor original (1) after extrusion, and fixing the electrode end of the sensor original (1);
s5, sleeving a ceramic pressing ring (5) on the periphery of the detection end of the sensor original (1), fixing the tail end of the detection end of the sensor original (1), arranging a gas filtering device (303) at the end part of the detection end of the sensor original (1) in the second cavity (306), enabling the gas filtering device (303) to abut against the ceramic pressing ring (5) to cover the detection end of the sensor original (1) in the second cavity (306), and finally arranging a sealing device (304) outside the gas filtering device (303) to enable the sealing device (304) to fix the gas filtering device (303) at the end part of the second cavity (306).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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