CN211577043U - Nitrogen oxygen sensor packaging structure - Google Patents
Nitrogen oxygen sensor packaging structure Download PDFInfo
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- CN211577043U CN211577043U CN201921936969.4U CN201921936969U CN211577043U CN 211577043 U CN211577043 U CN 211577043U CN 201921936969 U CN201921936969 U CN 201921936969U CN 211577043 U CN211577043 U CN 211577043U
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- sealing ring
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- inner cylinder
- ceramic gasket
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Abstract
The utility model belongs to the technical field of automobile exhaust monitoring, a nitrogen oxygen sensor packaging structure is proposed, including the electrode, the chip, the one end of chip is used for with the gaseous contact that awaits measuring, the other end of chip is used for being connected with the electrode, the inner tube, be used for fixed chip, the inside fender portion that has set gradually of inner tube, first ceramic gasket, first sealing ring, second ceramic gasket and second sealing ring, the chip passes first ceramic gasket in proper order, first sealing ring, second ceramic gasket and second sealing ring, the ceramic base, the one end of setting at the inner tube, be used for compressing tightly the second sealing ring along the axial, and a housing, one end and inner tube connection, first sealing ring, inner tube and shell enclose into closed cavity, the chip is located closed cavity with the one end of electrode connection. Through above-mentioned technical scheme, the fragile problem of nitrogen oxygen sensor chip among the prior art has been solved.
Description
Technical Field
The utility model belongs to the technical field of automobile exhaust monitoring, a nitrogen oxygen sensor packaging structure is related to.
Background
The nitrogen-oxygen sensor is used for detecting automobile exhaust, the most mature NOx sensor in the prior art is a zirconia-based electrochemical current testing method, the NOx sensor is formed by co-firing 6 layers of zirconia substrates, and a heating body, a testing electrode, an oxygen pump electrode and the like are added in the middle of the NOx sensor. The method firstly reduces the content of O2 in the tail gas to a very low degree (10-3ppm) by reducing the content of O2 in the tail gas of an automobile, decomposes NOx gas into N2 and O2 gases on the surface of a test electrode, and tests the concentration of NOx by measuring the current intensity generated by the O2 gas. The nitrogen oxygen sensor is internally provided with a core chip for detection, and the core chip inside the existing nitrogen oxygen sensor is easy to damage, so that the whole nitrogen oxygen sensor cannot work.
SUMMERY OF THE UTILITY MODEL
The utility model provides a nitrogen oxygen sensor packaging structure has solved the fragile problem of nitrogen oxygen sensor chip among the prior art.
The technical scheme of the utility model is realized like this: comprises that
An electrode is arranged on the base plate and is provided with a plurality of electrodes,
one end of the chip is used for contacting with gas to be detected, the other end of the chip is used for connecting with the electrode,
the inner barrel is used for fixing the chip, the inner barrel is internally provided with a blocking part, a first ceramic gasket, a first sealing ring, a second ceramic gasket and a second sealing ring in sequence, the chip penetrates through the first ceramic gasket, the first sealing ring, the second ceramic gasket and the second sealing ring in sequence,
the porcelain seat is arranged at one end of the inner cylinder and used for compressing the second sealing ring along the axial direction,
and one end of the shell is connected with the inner cylinder, the first sealing ring, the inner cylinder and the shell enclose a closed cavity, and one end of the chip, which is connected with the electrode, is positioned in the closed cavity.
Further, the first sealing ring is a talcum powder sealing ring.
Further, the inner cylinder comprises a first inner cylinder and a second inner cylinder, the first inner cylinder and the second inner cylinder are in riveting connection, the second inner cylinder is in riveting connection with the porcelain seat,
the first ceramic gasket, the first sealing ring and the second ceramic gasket are positioned in the first inner cylinder, and the second sealing ring is positioned in the second inner cylinder.
Further, a buffer gasket is arranged between the blocking part and the first ceramic gasket.
Further, the porcelain seat comprises a first porcelain seat and a second porcelain seat, the first porcelain seat is connected with the second inner cylinder,
a plurality of first slots are arranged in the first porcelain seat, a plurality of second slots are arranged in the second porcelain seat,
the electrodes are multiple, one ends of the electrodes are respectively inserted into the first slots, and the other ends of the electrodes are respectively inserted into the second slots.
Furthermore, a positioning bulge is arranged on the electrode, and a lower concave part corresponding to the positioning bulge is arranged in the second slot.
Further, still include the safety cover, the safety cover with the inner tube is kept away from the one end welding of porcelain seat, the one end of chip is located in the safety cover, be provided with the air vent on the safety cover.
The utility model discloses a theory of operation and beneficial effect do:
1. the utility model discloses the one end of well chip and the gaseous contact that awaits measuring for the nitrogen oxygen concentration conversion in the gas that awaits measuring is the signal of telecommunication, and is connected through electrode and external circuit, realizes the detection of nitrogen oxygen concentration in the gas that awaits measuring. The chip sequentially penetrates through the first ceramic gasket, the first sealing ring, the second ceramic gasket and the second sealing ring in the inner cylinder, and the chip is reliably fixed in the inner cylinder by tightly pressing the first ceramic gasket, the first sealing ring, the second ceramic gasket and the second sealing ring between the blocking part and the ceramic base.
The first sealing ring and the second sealing ring fix the chip at different parts of the chip, and compared with single-point fixing, the chip fixing device can realize a more stable fixing effect and avoid the chip from being broken under the working condition of severe vibration; meanwhile, one end of the chip is in contact with the gas to be detected, the other end of the chip is connected with the electrode, the gas to be detected is high-temperature gas, the first sealing ring can also play a sealing role, a closed space is formed among the first sealing ring, the inner barrel and the shell, and the high-temperature gas is prevented from influencing the work of the electrode and an external circuit. The first ceramic gasket and the second ceramic gasket clamp the first sealing ring firmly in the middle, and reliable sealing of the first sealing ring is facilitated.
The utility model discloses not only realize the reliable fixed of chip, realized the sealed isolation at chip both ends simultaneously, the reliability obtains very big improvement.
2. The utility model discloses well first sealing ring adopts the last suppression of talcum powder to form, and the talcum powder material is softer relatively, under certain pressure effect, can warp fine and close to play sealed and fixed effect.
3. The utility model discloses when carrying out the installation of first sealing ring and second sealing ring, at first through compressing tightly second ceramic gasket along the axial, realize compressing tightly of first sealing ring, then sticiss the second ceramic gasket with the second inner tube and place, realize the connection of first inner tube and second inner tube through the riveting. After the first inner cylinder and the second inner cylinder are riveted, the second sealing ring is put in and axially compressed, then the porcelain seat is tightly pressed on the second sealing ring for placement, and the second inner cylinder is connected with the porcelain seat through riveting.
The utility model discloses a divide into first inner tube and second inner tube with the inner tube, realize that the substep of first sealing ring and second sealing ring compresses tightly, is favorable to improving the sealed effect of first sealing ring.
4. The utility model discloses in set up buffer spacer between fender portion and first ceramic gasket, play the cushioning effect, avoid first ceramic gasket cracked at the pressure equipment in-process, further improve the utility model discloses a reliability.
5. The utility model discloses well electrode is a plurality ofly, at first inserts the slot two of second porcelain seat respectively with the one end of electrode, and the slot is fixed to a plurality of electrodes, then inserts a plurality of slots one of first porcelain seat with a plurality of electrodes simultaneously, realizes pegging graft fast of electrode and chip.
The cooperation of location arch and concave part down is convenient for realize the location of electrode at the second porcelain seat, has further improved the convenience that electrode and second porcelain seat are connected.
6. The arrangement of the protective cover in the utility model plays a role in protecting the chip; and the gas to be detected enters the protective cover through the vent hole and contacts with the chip, so that the detection of the gas to be detected is realized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the electrode positioning protrusion of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
in the figure: 1-electrode, 101-positioning bump, 2-chip, 3-inner cylinder, 31-first inner cylinder, 32-second inner cylinder, 4-porcelain seat, 41-first porcelain seat, 411-slot I, 42-second porcelain seat, 421-slot II, 4211-lower concave part, 5-shell, 6-baffle part, 7-first ceramic gasket, 8-first sealing ring, 9-second ceramic gasket, 10-second sealing ring, 11-buffer gasket, 12-protective cover and 121-vent hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, comprises
The electrodes 1 are arranged in a row in the direction of the axis,
a chip 2, one end of the chip 2 is used for contacting with the gas to be measured, the other end of the chip 2 is used for connecting with the electrode 1,
the inner cylinder 3 is used for fixing the chip 2, the inner cylinder 3 is internally provided with a blocking part 6, a first ceramic gasket 7, a first sealing ring 8, a second ceramic gasket 9 and a second sealing ring 10 in sequence, the chip 2 sequentially passes through the first ceramic gasket 7, the first sealing ring 8, the second ceramic gasket 9 and the second sealing ring 10,
a porcelain seat 4 arranged at one end of the inner cylinder 3 and used for compressing the second sealing ring 10 along the axial direction,
one end of the shell 5 is connected with the inner cylinder 3, a closed cavity is enclosed by the first sealing ring 8, the inner cylinder 3 and the shell 5, and the end of the chip 2 connected with the electrode 1 is positioned in the closed cavity.
One end of the chip 2 in the embodiment is in contact with the gas to be detected, and is used for converting the nitrogen-oxygen concentration in the gas to be detected into an electric signal and connecting the electric signal with an external circuit through the electrode 1, so that the detection of the nitrogen-oxygen concentration in the gas to be detected is realized. The chip 2 sequentially penetrates through the first ceramic gasket 7, the first sealing ring 8, the second ceramic gasket 9 and the second sealing ring 10 in the inner barrel 3, and the chip 2 is reliably fixed in the inner barrel 3 by pressing the first ceramic gasket 7, the first sealing ring 8, the second ceramic gasket 9 and the second sealing ring 10 between the blocking part 6 and the porcelain seat 4.
The first sealing ring 8 and the second sealing ring 10 fix the chip 2 at different positions of the chip 2, and compared with single-point fixing, the chip 2 can be fixed more stably, and the chip 2 is prevented from being broken under the working condition of severe vibration; simultaneously, because the one end of chip 2 and the gaseous contact that awaits measuring, the other end is connected with electrode 1, and the gas that awaits measuring is high-temperature gas, and first sealing ring 8 can also play sealed effect, forms the enclosure space between first sealing ring 8, inner tube 3 and the shell 5, avoids high-temperature gas to influence the work of electrode 1 and external circuit. The first ceramic gasket 7 and the second ceramic gasket 9 firmly clamp the first sealing ring 8 in the middle, and reliable sealing of the first sealing ring 8 is facilitated.
For realizing the reliable fixed of first sealing ring 8, the thickness of first ceramic gasket 7 and second ceramic gasket 9 should be more than 3mm, if select for use the metal material, can take place the oxidation under the high temperature, and first ceramic gasket 7 and second ceramic gasket 9 all adopt ceramic material, not only can be high temperature resistant, can not take place the oxidation under high temperature moreover.
The embodiment not only realizes the reliable fixation of the chip 2, but also realizes the sealing isolation of the two ends of the chip 2, and the reliability is greatly improved.
Further, the first seal ring 8 is a talc powder seal ring.
In the embodiment, the first sealing ring 8 is formed by pressing talcum powder, and the talcum powder is relatively soft and can deform compactly under the action of certain pressure, so that the sealing and fixing effects are achieved.
Further, the inner cylinder 3 comprises a first inner cylinder 31 and a second inner cylinder 32, the first inner cylinder 31 and the second inner cylinder 32 are in riveting connection, the second inner cylinder 32 is in riveting connection with the porcelain seat 4,
the first ceramic gasket 7, the first seal ring 8 and the second ceramic gasket 9 are positioned in the first inner cylinder 31, and the second seal ring 10 is positioned in the second inner cylinder 32.
In the embodiment, when the first sealing ring 8 and the second sealing ring 10 are installed, the second ceramic gasket 9 is compressed in the axial direction to compress the first sealing ring 8, the second inner cylinder 32 is compressed against the second ceramic gasket 9 to be placed, and the first inner cylinder 31 and the second inner cylinder 32 are connected by riveting. After the first inner cylinder 31 and the second inner cylinder 32 are riveted, the second sealing ring 10 is put in and the second sealing ring 10 is axially compressed, then the porcelain seat 4 is compressed against the second sealing ring 10 for placement, and the second inner cylinder 32 is connected with the porcelain seat 4 through riveting.
In the embodiment, the inner cylinder 3 is divided into the first inner cylinder 31 and the second inner cylinder 32, so that the first sealing ring 8 and the second sealing ring 10 are compressed step by step, and the sealing effect of the first sealing ring 8 is improved.
Further, a cushion pad 11 is provided between the stopper 6 and the first ceramic pad 7.
In this embodiment, the buffer gasket 11 is disposed between the blocking portion 6 and the first ceramic gasket 7, so as to play a role in buffering, prevent the first ceramic gasket 7 from being broken during the press-fitting process, and further improve the reliability of this embodiment.
Further, the porcelain seat 4 includes a first porcelain seat 41 and a second porcelain seat 42, the first porcelain seat 41 is connected with the second inner cylinder 32,
a plurality of slots I411 are arranged in the first porcelain seat 41, a plurality of slots II 421 are arranged in the second porcelain seat 42,
the number of the electrodes 1 is multiple, one end of each of the electrodes 1 is inserted into the first slots 411, and the other end of each of the electrodes 1 is inserted into the second slot 421.
Furthermore, a positioning protrusion 101 is disposed on the electrode 1, and a concave portion 4211 corresponding to the positioning protrusion 101 is disposed in the second slot 421.
In this embodiment, a plurality of electrodes 1 are provided, and one end of each electrode 1 is inserted into the second slot 421 of the second ceramic base 42, and the second slot 421 fixes the plurality of electrodes 1, and then the plurality of electrodes 1 are simultaneously inserted into the first slots 411 of the first ceramic base 41, so as to realize the rapid insertion of the electrodes 1 and the chip 2.
The positioning of the electrode 1 on the second ceramic base 42 is facilitated by the cooperation of the positioning protrusions 101 and the lower concave portions 4211, and the convenience of connection of the electrode 1 and the second ceramic base 42 is further improved.
Further, still include safety cover 12, safety cover 12 and the one end welding of keeping away from ceramic base 4 of inner tube 3, the one end of chip 2 is located safety cover 12, is provided with air vent 121 on the safety cover 12.
The protective cover 12 in this embodiment is provided to protect the chip 2; the gas to be detected enters the protective cover 12 through the vent hole 121 and contacts the chip 2, so that the detection of the gas to be detected is realized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A nitrogen oxygen sensor packaging structure is characterized in that: comprises that
An electrode (1) is provided,
a chip (2), one end of the chip (2) is used for contacting with the gas to be measured, the other end of the chip (2) is used for connecting with the electrode (1),
the inner barrel (3) is used for fixing the chip (2), a blocking part (6), a first ceramic gasket (7), a first sealing ring (8), a second ceramic gasket (9) and a second sealing ring (10) are sequentially arranged in the inner barrel (3), the chip (2) sequentially penetrates through the first ceramic gasket (7), the first sealing ring (8), the second ceramic gasket (9) and the second sealing ring (10),
a porcelain seat (4) arranged at one end of the inner cylinder (3) and used for compressing the second sealing ring (10) along the axial direction,
and one end of the shell (5) is connected with the inner cylinder (3), the first sealing ring (8), the inner cylinder (3) and the shell (5) enclose a closed cavity, and one end of the chip (2) connected with the electrode (1) is positioned in the closed cavity.
2. The oxynitride sensor package structure of claim 1, wherein: the first sealing ring (8) is a talcum powder sealing ring.
3. The oxynitride sensor package structure of claim 1, wherein: the inner cylinder (3) comprises a first inner cylinder (31) and a second inner cylinder (32), the first inner cylinder (31) and the second inner cylinder (32) are in riveting connection, the second inner cylinder (32) is in riveting connection with the porcelain seat (4),
the first ceramic gasket (7), the first sealing ring (8) and the second ceramic gasket (9) are positioned in the first inner cylinder (31), and the second sealing ring (10) is positioned in the second inner cylinder (32).
4. The oxynitride sensor package structure of claim 1, wherein: a buffer gasket (11) is arranged between the blocking part (6) and the first ceramic gasket (7).
5. The oxynitride sensor package structure of claim 3, wherein: the porcelain seat (4) comprises a first porcelain seat (41) and a second porcelain seat (42), the first porcelain seat (41) is connected with the second inner cylinder (32),
a plurality of first slots (411) are arranged in the first porcelain seat (41), a plurality of second slots (421) are arranged in the second porcelain seat (42),
the number of the electrodes (1) is multiple, one ends of the electrodes (1) are respectively inserted into the slots I (411), and the other ends of the electrodes (1) are respectively inserted into the slots II (421).
6. The oxynitride sensor package structure of claim 5, wherein: a positioning protrusion (101) is arranged on the electrode (1), and a lower concave portion (4211) corresponding to the positioning protrusion (101) is arranged in the second slot (421).
7. The oxynitride sensor package structure of claim 1, wherein: still include safety cover (12), safety cover (12) with inner tube (3) are kept away from the one end welding of ceramic base (4), the one end of chip (2) is located in safety cover (12), be provided with air vent (121) on safety cover (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921936969.4U CN211577043U (en) | 2019-11-11 | 2019-11-11 | Nitrogen oxygen sensor packaging structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921936969.4U CN211577043U (en) | 2019-11-11 | 2019-11-11 | Nitrogen oxygen sensor packaging structure |
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| Publication Number | Publication Date |
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| CN211577043U true CN211577043U (en) | 2020-09-25 |
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| CN201921936969.4U Active CN211577043U (en) | 2019-11-11 | 2019-11-11 | Nitrogen oxygen sensor packaging structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115266856A (en) * | 2022-06-15 | 2022-11-01 | 常州联德电子有限公司 | High-temperature multi-component flue gas sensor and preparation method thereof |
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2019
- 2019-11-11 CN CN201921936969.4U patent/CN211577043U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115266856A (en) * | 2022-06-15 | 2022-11-01 | 常州联德电子有限公司 | High-temperature multi-component flue gas sensor and preparation method thereof |
| CN115266856B (en) * | 2022-06-15 | 2024-02-27 | 常州联德电子有限公司 | High-temperature multi-component smoke sensor and preparation method thereof |
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