CN207052937U - A kind of spark plug - Google Patents
A kind of spark plug Download PDFInfo
- Publication number
- CN207052937U CN207052937U CN201720985656.2U CN201720985656U CN207052937U CN 207052937 U CN207052937 U CN 207052937U CN 201720985656 U CN201720985656 U CN 201720985656U CN 207052937 U CN207052937 U CN 207052937U
- Authority
- CN
- China
- Prior art keywords
- main metal
- metal fixture
- insulator
- spark plug
- insulation layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Spark Plugs (AREA)
Abstract
A kind of spark plug, mainly it is made up of main metal fixture, insulator, lateral electrode, central electrode, insulating cylinder and thermal insulation layer etc..Insulator is aluminium oxide ceramics, and the external diameter at its end of striking sparks is less than the internal diameter of main metal fixture installation threaded portion.Insulating cylinder is made by resistant to elevated temperatures insulating materials of the thermal conductivity factor less than 5W/m.K, and its internal-and external diameter is respectively equal to the external diameter at insulator sparking end and the internal diameter of main metal fixture installation threaded portion；The insulating materials typically selects transparent pure quartz glass.The end face coating thermal insulation layer at the nearly sparking end of insulating cylinder, thermal insulation layer are usually to coat what is formed by that can reflect the antiradiation coating of most of heat radiation, the non-bulging transverse plane in the main metal fixture installation end of thread in outer surface of thermal insulation layer.The beneficial effect of the spark plug is to greatly prolong service life.
Description
Technical field
A kind of electric ignition device is the utility model is related to, especially with a kind of spark plug of long lifespan.
Background technology
In a kind of spark plug and a kind of patent of invention of high-pressure ignition wire that Authorization Notice No. is the B of CN 104836120,
The sparking end of the alumina ceramic insulator of the invention spark plug is directly exposed among the high temperature of frequent explosive combustion, and oxygen
Change aluminium ceramics thermal conductivity factor is larger and about 31W/m.K, so as to closer to the alumina ceramic insulator at spark plug sparking end
Temperature it is higher.Because the resistivity of aluminium oxide ceramics declines with the rise of temperature and in logarithmic form, insulator sparking
Hold part radial direction resistance value it is smaller and closer to sparking end insulator radial direction resistance value it is smaller；And then shorten spark plug
Service life.
The content of the invention
In order to overcome insulator to beat the less deficiency of radial insulation resistance value of tip portion, the utility model provides a kind of
Spark plug, insulating resistance value when it can dramatically increase spark plug work between central electrode and main metal fixture, makes so as to extend
Use the life-span.
Technical scheme is used by the utility model solves its technical problem:The utility model mainly by main metal fixture,
Insulator, lateral electrode, central electrode, insulating cylinder and thermal insulation layer etc. are formed.The sparking end of central electrode has certain taper
Tip.Insulator is aluminium oxide ceramics, and the external diameter of its dozen of tip portions is less than the internal diameter of main metal fixture installation threaded portion, and
Its end face for striking sparks end is provided with least one circle annular protrusion.Insulating cylinder is resistant to elevated temperatures exhausted less than 5W/m.K by thermal conductivity factor
Made of edge material, its internal-and external diameter is respectively equal to the external diameter at insulator sparking end and the internal diameter of main metal fixture installation threaded portion.
Insulating cylinder is enclosed on the outer wall that insulator beats tip portion, sinks into the end of the main metal fixture installation end of thread in the end face at its end of closely striking sparks
Plane.The insulating materials is preferably more than 99.9 ﹪ pure quartz glass, the high purity quartz glass from dioxide-containing silica
Glass preferably selects transparent pure quartz glass again.Because the thermal conductivity factor below 1000 DEG C of pure quartz glass only has 2W/m.K
Left and right, thermal coefficient of expansion is minimum and can bear thermal shock, and mechanical strength is better than ceramics, the chemically and electrically property especially under high temperature
Can be very stable, it is fabulous high temperature insulating material.Central electrode, insulator, insulating cylinder and main metal fixture adjacent surface between
Gap fill fluid sealant, so as to prevent ozone caused by highfield existing for their surfaces to their corruption from outward appearance to inner essence
Erosion.Insulating cylinder closely strike sparks end end face coating thermal insulation layer, thermal insulation layer be usually by can reflect most of heat radiation antiradiation painting
Material coating forms, and the antiradiation coating preferably selects nano ceramics cenosphere coating, the nano ceramics cenosphere
Coating preferably selects nano aluminium oxide ceramic hollow microballon coating again.The outer surface of thermal insulation layer is non-bulging to install spiral shell in main metal fixture
The transverse plane at line end.
In the above-mentioned structure setting of the utility model：Adjustment fire can be reached by adjusting height and the thickness of insulating cylinder
Hua Sai calorific value.Insulating cylinder is usually made of transparent pure quartz glass, and so its radial insulation resistance is at high temperature
Larger numerical value can be kept for a long time, so as to make up the electricity of radial insulation when beating tip portion high temperature of alumina ceramic insulator
The less deficiency of resistance, and then the service life of extending plug.Thermal insulation layer can prevent insulating cylinder closely strike sparks end end face it is direct
The insulation quick aging of nearly sparking end insulating cylinder is caused in flame.
The beneficial effects of the utility model are to greatly prolong service life.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Accompanying drawing 1 is the central cross-sectional view that the utility model embodiment beats tip portion.
In figure：1. main metal fixture, 2. insulators, 2A. annular protrusions, 3. lateral electrodes, 4. central electrodes, 5 insulating cylinders, 6. every
Thermosphere.
Embodiment
Beaten in the utility model embodiment of accompanying drawing 1 in the central cross-sectional view of tip portion, insulator 2 is aluminium oxide ceramics
, its upper end is provided with two circle annular protrusion 2A.Insulating cylinder 5 is made by transparent pure quartz glass, its internal-and external diameter point
Deng Yu not the external diameter of the upper end of insulator 2 and the internal diameter of the installation threaded portion of main metal fixture 1.Central electrode 4, insulator 2, insulating cylinder
Fill fluid sealant in gap between 5 and the adjacent surface of main metal fixture 1.The upper surface of insulating cylinder 5 coated after coarse processing every
Thermosphere 6, thermal insulation layer 6 are formed by the nano aluminium oxide ceramic hollow microballon coating coating that can reflect 80 more than ﹪ heat radiations.
The upper surface of thermal insulation layer 6 is slightly less than the upper transverse plane of main metal fixture 2.
Claims (6)
1. a kind of spark plug, mainly it is made up of main metal fixture, insulator, lateral electrode and central electrode etc., it is characterized in that：Middle electrocardio
The sparking end of pole is the tip for having certain taper；The external diameter that insulator beats tip portion is less than main metal fixture installation threaded portion
Internal diameter；Insulating cylinder is that its internal-and external diameter is respectively equal to insulator and beaten made of insulating materials of the thermal conductivity factor less than 5W/m.K
The internal diameter of external diameter and main metal fixture the installation threaded portion of fire end；Insulating cylinder is enclosed on the outer wall that insulator beats tip portion, and its is near
Sink into the transverse plane of the main metal fixture installation end of thread in the end face at sparking end；Central electrode, insulator, insulating cylinder and main metal fixture
Adjacent surface between gap fill fluid sealant；Insulating cylinder closely strike sparks end end face coating thermal insulation layer, the outer surface of thermal insulation layer
The non-bulging transverse plane in the main metal fixture installation end of thread.
2. a kind of spark plug according to claim 1, it is characterized in that：The insulating materials is more than from dioxide-containing silica
99.9 ﹪ pure quartz glass.
3. a kind of spark plug according to claim 1, it is characterized in that：The thermal insulation layer is formed by the coating of antiradiation coating
's.
4. a kind of spark plug according to claim 2, it is characterized in that：The pure quartz glass selects transparent high-purity stone
English glass.
5. a kind of spark plug according to claim 3, it is characterized in that：The antiradiation coating selection nano ceramics is hollow micro-
Pearl coating.
6. a kind of spark plug according to claim 5, it is characterized in that：The nano ceramics cenosphere coating selection nanometer
Aluminium oxide ceramics cenosphere coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720985656.2U CN207052937U (en) | 2017-08-09 | 2017-08-09 | A kind of spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720985656.2U CN207052937U (en) | 2017-08-09 | 2017-08-09 | A kind of spark plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207052937U true CN207052937U (en) | 2018-02-27 |
Family
ID=61499320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720985656.2U Expired - Fee Related CN207052937U (en) | 2017-08-09 | 2017-08-09 | A kind of spark plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207052937U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546574A (en) * | 2017-08-09 | 2018-01-05 | 宋天顺 | A kind of spark plug |
-
2017
- 2017-08-09 CN CN201720985656.2U patent/CN207052937U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546574A (en) * | 2017-08-09 | 2018-01-05 | 宋天顺 | A kind of spark plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180227 Termination date: 20200809 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |