CN211175357U - Sealing structure of oxygen sensor - Google Patents
Sealing structure of oxygen sensor Download PDFInfo
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- CN211175357U CN211175357U CN201922137099.0U CN201922137099U CN211175357U CN 211175357 U CN211175357 U CN 211175357U CN 201922137099 U CN201922137099 U CN 201922137099U CN 211175357 U CN211175357 U CN 211175357U
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Abstract
The utility model discloses a sealing structure of an oxygen sensor, which comprises a base, a front ceramic piece, a rear ceramic piece and a sealing filling layer; the base is provided with an installation channel, and the installation channel is an equal-diameter channel; the front ceramic piece is arranged in the installation channel and is in sealing fit with the inner side wall of the installation channel; the rear ceramic piece is provided with a rear abutting part, and the rear abutting part is installed in the installation channel and is in sealing fit with the inner side wall of the installation channel; the sealing filling layer is positioned in the mounting channel and filled between the rear abutting part and the front ceramic piece. In the compression process of the sealing filling layer, the utility model can ensure that the gap between the front ceramic piece and the rear ceramic piece has enough acting force to extrude the sealing filling layer, and can improve the sealing effect; moreover, the sealing filling of the sealing filling layer is facilitated, the stress is uniform, and the sealing filling layer can be tightly filled, so that the sealing effect is further improved.
Description
Technical Field
The utility model relates to a seal structure of oxygen sensor.
Background
As shown in fig. 1, the conventional oxygen sensor is generally used for detecting the concentration of oxygen content, and has a base 10a, a front ceramic piece 20a, a rear ceramic piece 30a, and a sealing filling layer 40a, wherein the front ceramic piece 20a, the rear ceramic piece 30a, and the sealing filling layer 40a are all located in the base 10a, and the sealing filling layer 40a is deformed and shrunk by applying pressure to the front ceramic piece 20a and the rear ceramic piece 30a, so as to achieve the purpose of sealing. The sizes of the rear ceramic piece 30a and the sealing filling layer 40a are both larger than that of the front ceramic piece 20a, and in the compression process of the sealing filling layer 40a, half of force acts on the base 10a, so that the acting force at the ceramic gap is reduced, the sealing filling layer 40a is not favorable for filling and sealing, the sealing effect is poor, and the industrial requirements cannot be met.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a sealing structure of an oxygen sensor, which can improve the sealing effect.
The purpose of the utility model is realized by adopting the following technical scheme:
a sealing structure of an oxygen sensor comprises a base, a front ceramic piece, a rear ceramic piece and a sealing filling layer; the base is provided with an installation channel, and the installation channel is an equal-diameter channel; the front ceramic piece is arranged in the installation channel and is in sealing fit with the inner side wall of the installation channel; the rear ceramic piece is provided with a rear abutting part, and the rear abutting part is installed in the installation channel and is in sealing fit with the inner side wall of the installation channel; the sealing filling layer is positioned in the mounting channel and filled between the rear abutting part and the front ceramic piece.
One end of the front ceramic piece, which is close to the rear ceramic piece, is provided with a first flat end surface and a first conical surface surrounding the periphery of the first flat end surface; the first conical surface is inclined gradually towards the direction far away from the rear ceramic piece from the end close to the first flat end surface to the end far away from the first flat end surface.
The base is also provided with a conical communication port communicated with the mounting channel; the inner diameter of the conical communication opening is gradually reduced from one end close to the installation channel to one end far away from the installation channel; and a sealing gasket is arranged between one end of the front ceramic piece, which is far away from the rear ceramic piece, and the inner side wall of the conical communication port.
The sealing gasket is a red copper gasket.
One end of the rear abutting part, which is close to the front ceramic piece, is provided with a second conical surface and a second flat end surface surrounding the periphery of the second conical surface; the second conical surface is gradually inclined towards the direction far away from the front ceramic piece from one end close to the second flat end surface to one end far away from the second flat end surface.
One end of the rear abutting part, which is close to the front ceramic piece, is also provided with a third conical surface surrounding the periphery of the second flat end surface; the third conical surface is gradually inclined towards the direction far away from the front ceramic piece from one end close to the second flat end surface to one end far away from the second flat end surface.
The rear ceramic piece also comprises a main body part and a matching part; the matching part is positioned between the rear abutting part and the main body part, and the diameter of the rear abutting part and the diameter of the main body part are both smaller than the diameter of the matching part; the base is also provided with a rear channel communicated with the mounting channel; the mating portion is mounted in the rearward passageway.
The sealing filling layer is a talcum powder layer.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a sealing structure of oxygen sensor, it is through setting up the installation passageway to the equal diameter passageway, and with preceding ceramic member, back ceramic member, sealed filling layer and installation passageway cooperation, can guarantee that in the sealed filling layer compression process, preceding ceramic member, back ceramic member clearance have sufficient effort to extrude sealed filling layer, can improve sealed effect; moreover, the sealing filling of the sealing filling layer is facilitated, the stress is uniform, and the sealing filling layer can be tightly filled, so that the sealing effect is further improved.
Drawings
FIG. 1 is a schematic view of a sealing structure of a conventional oxygen sensor;
fig. 2 is a schematic view of a sealing structure of the oxygen sensor of the present invention;
fig. 3 is a schematic view of a base of the present invention;
fig. 4 is a schematic view of a rear ceramic part of the present invention;
10, a base; 11. installing a channel; 12. a conical communication port; 13. a front channel; 14. a rear channel; 20. a front ceramic piece; 21. a first flat end face; 22. a first conical surface; 30. a rear ceramic part; 31. a rear abutment; 32. a second tapered surface; 33. a second flat end face; 34. a third conical surface; 35. a main body portion; 36. a fitting portion; 37. A first transition portion; 38. a second transition portion; 40. sealing the filling layer; 50. a gasket seal.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 2 to 4, a sealing structure of an oxygen sensor includes a base 10, a front ceramic piece 20, a rear ceramic piece 30, and a sealing packing layer 40; the base 10 is provided with an installation channel 11, and the installation channel 11 is an equal-diameter channel; the front ceramic piece 20 is arranged in the installation channel 11 and is in sealing fit with the inner side wall of the installation channel 11; the rear ceramic piece 30 is provided with a rear abutting part 31, and the rear abutting part 31 is installed in the installation channel 11 and is in sealing fit with the inner side wall of the installation channel 11; the sealing filler layer 40 is located in the mounting channel 11 and fills between the rear abutment 31 and the front ceramic piece 20. According to the common knowledge, the equal-diameter channel is a channel with the same diameter in each area.
The utility model provides a sealing structure of oxygen sensor, it is through setting up installation passageway 11 to the constant diameter passageway, and with preceding ceramic member 20, back ceramic member 30, sealed filling layer 40 and installation passageway 11 cooperation, make the both ends of sealed filling layer 40 bear the effort of preceding ceramic member 20, back ceramic member 30 respectively, can guarantee that in the compression process of sealed filling layer 40, there is sufficient effort extrusion sealed filling layer 40 in preceding ceramic member 20, back ceramic member 30 clearance, can improve sealed effect; meanwhile, because the two ends of the sealing filling layer 40 are stressed uniformly, the sealing filling layer 40 can be filled compactly, so that the sealing effect is further improved, and the looseness of the front ceramic part 20 and the back ceramic part 30 is not easy to occur, so that the reliability of long-time use is improved.
Preferably, one end of the front ceramic piece 20 close to the rear ceramic piece 30 is provided with a first flat end surface 21 and a first conical surface 22 surrounding the periphery of the first flat end surface 21; the first tapered surface 22 is inclined gradually away from the rear ceramic member 30 from the end close to the first flat end surface 21 to the end away from the first flat end surface 21. By providing the first flat end surface 21 and the first tapered surface 22 at the end of the front ceramic element 20 close to the rear ceramic element 30, the extrusion effect of the end of the front ceramic element 20 close to the rear ceramic element 30 on the sealing filler layer 40 can be improved, so that the sealing filler layer 40 is extruded more densely.
The base 10 is also provided with a conical communication port 12 communicated with the mounting channel 11; the inner diameter of the tapered communication port 12 gradually decreases from one end close to the mounting passage 11 to one end far from the mounting passage 11; a sealing gasket 50 is arranged between one end of the front ceramic piece 20 far away from the rear ceramic piece 30 and the inner side wall of the conical communication port 12. The sealing effect between the front ceramic member 20 and the base 10 can be improved by using the sealing gasket 50. Specifically, the sealing gasket 50 is a red copper gasket to reduce cost.
Specifically, a front channel 13 is further disposed on the base 10, the tapered communication port 12 is located between the mounting channel 11 and the front channel 13, and the front channel 13 is communicated with the tapered communication port 12.
Preferably, one end of the rear abutting part 31 close to the front ceramic piece 20 is provided with a second conical surface 32 and a second flat end surface 33 surrounding the periphery of the second conical surface 32; the second tapered surface 32 is inclined gradually away from the front ceramic member 20 from the end close to the second flat end surface 33 to the end away from the second flat end surface 33. One end of the rear abutting part 31 close to the front ceramic piece 20 is also provided with a third conical surface 34 surrounding the periphery of the second flat end surface 33; the third tapered surface 34 is gradually inclined away from the front ceramic 20 from the end close to the second flat end surface 33 to the end far from the second flat end surface 33. By providing the second tapered surface 32, the second flat end surface 33, and the third tapered surface 34 at the end of the rear ceramic part 30 close to the front ceramic part 20, the extrusion effect of the end of the rear ceramic part 30 close to the front ceramic part 20 on the sealing filler layer 40 can be improved, so that the sealing filler layer 40 is extruded more densely.
The rear ceramic piece 30 further includes a main body portion 35 and a fitting portion 36; the matching part 36 is positioned between the rear abutting part 31 and the main body part 35, and the diameter of the rear abutting part 31 and the diameter of the main body part 35 are both smaller than the diameter of the matching part 36; the base 10 is also provided with a rear channel 14 communicated with the mounting channel 11; the mating portion 36 is mounted within the rearward passageway 14. By adopting the above structure, the supporting function of the rear ceramic member 30 can be improved. Specifically, a first transition portion 37 is arranged between the matching portion 36 and the rear abutting portion 31, a second transition portion 38 is arranged between the matching portion 36 and the main body portion 35, and the diameter of the first transition portion 37 gradually increases from one end close to the rear abutting portion 31 to one end close to the matching portion 36, so that smooth transition is achieved. The diameter of the second transition portion 38 gradually increases from the end close to the main body portion 35 to the end close to the fitting portion 36, and the outer side walls of the fitting portion 36 and the second transition portion 38 are attached to the inner side wall of the rear channel 14, so that a limiting position can be formed, the mounting firmness of the rear ceramic part 30 is improved, and the rear ceramic part 30 is prevented from shifting.
Preferably, the sealing filler layer 40 is a talc powder layer to improve the sealing effect and reduce the cost.
Preferably, the sensing element of the oxygen sensor is arranged in the front ceramic part 20, the sealing filling layer 40 and the rear ceramic part 30 in a penetrating way.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. A sealing structure of an oxygen sensor, characterized in that: comprises a base, a front ceramic piece, a rear ceramic piece and a sealing filling layer; the base is provided with an installation channel, and the installation channel is an equal-diameter channel; the front ceramic piece is arranged in the installation channel and is in sealing fit with the inner side wall of the installation channel; the rear ceramic piece is provided with a rear abutting part, and the rear abutting part is installed in the installation channel and is in sealing fit with the inner side wall of the installation channel; the sealing filling layer is positioned in the mounting channel and filled between the rear abutting part and the front ceramic piece.
2. The sealing structure of an oxygen sensor according to claim 1, characterized in that: one end of the front ceramic piece, which is close to the rear ceramic piece, is provided with a first flat end surface and a first conical surface surrounding the periphery of the first flat end surface; the first conical surface is inclined gradually towards the direction far away from the rear ceramic piece from the end close to the first flat end surface to the end far away from the first flat end surface.
3. The sealing structure of an oxygen sensor according to claim 1, characterized in that: the base is also provided with a conical communication port communicated with the mounting channel; the inner diameter of the conical communication opening is gradually reduced from one end close to the installation channel to one end far away from the installation channel; and a sealing gasket is arranged between one end of the front ceramic piece, which is far away from the rear ceramic piece, and the inner side wall of the conical communication port.
4. The sealing structure of an oxygen sensor according to claim 3, characterized in that: the sealing gasket is a red copper gasket.
5. The sealing structure of an oxygen sensor according to claim 1, characterized in that: one end of the rear abutting part, which is close to the front ceramic piece, is provided with a second conical surface and a second flat end surface surrounding the periphery of the second conical surface; the second conical surface is gradually inclined towards the direction far away from the front ceramic piece from one end close to the second flat end surface to one end far away from the second flat end surface.
6. The sealing structure of an oxygen sensor according to claim 5, characterized in that: one end of the rear abutting part, which is close to the front ceramic piece, is also provided with a third conical surface surrounding the periphery of the second flat end surface; the third conical surface is gradually inclined towards the direction far away from the front ceramic piece from one end close to the second flat end surface to one end far away from the second flat end surface.
7. The sealing structure of an oxygen sensor according to claim 1, characterized in that: the rear ceramic piece also comprises a main body part and a matching part; the matching part is positioned between the rear abutting part and the main body part, and the diameter of the rear abutting part and the diameter of the main body part are both smaller than the diameter of the matching part; the base is also provided with a rear channel communicated with the mounting channel; the mating portion is mounted in the rearward passageway.
8. The sealing structure of an oxygen sensor according to claim 1, characterized in that: the sealing filling layer is a talcum powder layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922137099.0U CN211175357U (en) | 2019-12-03 | 2019-12-03 | Sealing structure of oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922137099.0U CN211175357U (en) | 2019-12-03 | 2019-12-03 | Sealing structure of oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211175357U true CN211175357U (en) | 2020-08-04 |
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ID=71827018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922137099.0U Active CN211175357U (en) | 2019-12-03 | 2019-12-03 | Sealing structure of oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211175357U (en) |
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2019
- 2019-12-03 CN CN201922137099.0U patent/CN211175357U/en active Active
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