CN101738286B - Ground isolating device for pressure/differential pressure sensor - Google Patents
Ground isolating device for pressure/differential pressure sensor Download PDFInfo
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- CN101738286B CN101738286B CN2008102331037A CN200810233103A CN101738286B CN 101738286 B CN101738286 B CN 101738286B CN 2008102331037 A CN2008102331037 A CN 2008102331037A CN 200810233103 A CN200810233103 A CN 200810233103A CN 101738286 B CN101738286 B CN 101738286B
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Abstract
The invention relates to a ground isolating device for a pressure/differential pressure sensor, which comprises glass, a metal ring and a membrane seat. A lug boss is arranged on the inner circle of an insulating ceramic ring, the insulating ceramic ring is provided with a through hole along the radial direction, the two end faces of the lug boss of the insulating ceramic ring are positioned on the membrane seat, and the metal ring and the membrane seat are positioned above and below the insulating ceramic ring respectively; and the insulating ceramic ring, the glass, the metal ring and the membrane seat are sealed. The insulating ceramic ring is sealed in the membrane seat of the sensor so that the sensor is isolated from the ground, the anti-jamming performance of the sensor is improved and the normal work of the sensor is ensured.
Description
Technical field
The present invention relates to a kind of sensor, particularly a kind of spacer assembly over the ground that is used for pressure/differential pressure sensor.
Background technology
Pressure/differential pressure sensor is widely used in various field, as medicine equipment, Industry Control, pressure control, Aero-Space etc.Wherein the pressure/differential pressure sensor of metal capacitance principle work is widely used in the pressure detection of various media, because media environment is at the scene of Iron and Steel Production, environment measuring etc. mostly, working environment more complicated, abominable, easily produce stronger Electromagnetic Interference, because the induction of signal end of present Pressure and Difference Pressure Transmitter and shell are not isolated, make sensor directly be connected with the earth, sensor is subjected to the interference of electromagnetic signal and cisco unity malfunction often in work.
Summary of the invention
The purpose of this invention is to provide a kind of spacer assembly over the ground that is used for pressure/differential pressure sensor, in the sensor film seat, sensor and ground are isolated insulating ceramics ring seal knot, improve the sensor insulativity, guarantee the operate as normal of sensor.
Technical scheme of the present invention is: comprise glass, becket and film seat, it is characterized in that: the interior circle of insulating ceramics ring is provided with boss, the insulating ceramics ring is disposed radially a through hole, insulating ceramics ring boss both ends of the surface are positioned the film seat, becket and film seat lay respectively at the upper and lower of insulating ceramics ring, insulating ceramics ring and glass, becket and film seat sealed knot.
The both ends of the surface edge of described insulating ceramics ring is a circular arc.
Adopt technical solution of the present invention, the insulating ceramics ring becomes integral body by glass and film seat high temperature sintering.The insulating ceramics ring is isolated into two sections with the film seat of sensor, utilizes the high strength and the insulativity of pottery, makes between the induction of signal end of sensor and shell to isolate, and isolates purpose over the ground to reach inductor.Adopt the sensor of device preparation of the present invention to isolate over the ground,, still have the ability of stronger anti-electromagnetic interference signal, guarantee the operate as normal of sensor even in complex operating environment.
Insulating ceramics ring of the present invention is easy to processing and forming, and pottery has high-insulativity, high strength, has affinity with the same expansion coefficient glass, is easy to sealed knot.
Description of drawings
Fig. 1 is the structural representation of insulating ceramics ring;
Fig. 2 is a kind of embodiment of the present invention.
Embodiment
Referring to Fig. 1 and Fig. 2, be provided with boss at the interior circle of insulating ceramics ring 2, boss both ends of the surface seam accurately is positioned metal film seat 1, in order to guarantee that ceramic ring is smooth with the coplane that the metal film seat is connected, is beneficial to the glass sealed knot.Insulating ceramics ring boss both ends of the surface are positioned the film seat, and becket and film seat lay respectively at the upper and lower of insulating ceramics ring, insulating ceramics ring and glass, becket and film seat sealed knot.The insulating ceramics ring is disposed radially a through hole 5, and is working properly to guarantee two pole plates of capacitance type sensor.The diameter of described through hole is 1～1.5mm, present embodiment insulating ceramics ring through-hole diameter is 1.1mm, the extension line of a utmost point of sensor capacitance pole plate passes described through hole and draws, both can fixation of sensor capacitor plate extension line, can guarantee again that the pole plate extension line does not need to add to the isolation of another pole plate again and isolate pottery.
Comprise glass, becket and film seat, it is characterized in that: the interior circle of insulating ceramics ring is provided with boss, and the insulating ceramics ring is disposed radially a through hole,
The both ends of the surface edge of described insulating ceramics ring is circular-arc, makes ceramic ring and glass sealed knot face smooth, smooth, is the fillet smooth connection between ceramic plane and the glass.
Referring to Fig. 2; with film seat 1, ceramic ring 2, becket 3, glass 4 cleaning, dryings; insulating ceramics ring boss both ends of the surface are positioned the film seat; becket and film seat lay respectively at the upper and lower of insulating ceramics ring; glass is arranged in the insulating ceramics ring, in the sintering anchor clamps that film seat, ceramic ring, becket, glass 4 are packed into, and heat fused glass in the gas shield stove; cooling cooling again, glass is one with ceramic ring, becket sealed knot.
In order to guarantee ceramic ring and glass sealed knot effect, the ceramic ring of use should have affinity with glass, and promptly the expansion coefficient of ceramic ring and glass is approaching, and both expansion coefficient differ should be less than 0.5.
Claims (2)
1. spacer assembly over the ground that is used for pressure/differential pressure sensor, comprise glass, becket and film seat, it is characterized in that: the interior circle of insulating ceramics ring is provided with boss, the insulating ceramics ring has been disposed radially a through hole, and insulating ceramics ring boss lower surface is positioned the film seat, and becket and film seat lay respectively at the upper and lower of insulating ceramics ring, glass is arranged in the insulating ceramics ring, glass is ceramic ring, the metal ring seal, and the film seat is become one.
2. the spacer assembly over the ground that is used for pressure/differential pressure sensor according to claim 1 is characterized in that: the through-hole diameter of described insulating ceramics ring is 1～1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102331037A CN101738286B (en) | 2008-11-24 | 2008-11-24 | Ground isolating device for pressure/differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102331037A CN101738286B (en) | 2008-11-24 | 2008-11-24 | Ground isolating device for pressure/differential pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101738286A CN101738286A (en) | 2010-06-16 |
| CN101738286B true CN101738286B (en) | 2011-12-21 |
Family
ID=42462049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102331037A Active CN101738286B (en) | 2008-11-24 | 2008-11-24 | Ground isolating device for pressure/differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101738286B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749165A (en) * | 2011-04-21 | 2012-10-24 | 福建上润精密仪器有限公司 | Electric insulation structure of differential metal capacitive film box and metal casing assembly |
| CN104964784A (en) * | 2015-07-10 | 2015-10-07 | 四川奇胜科技有限公司 | Core body of high-temperature and high-pressure sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800413A (en) * | 1969-10-27 | 1974-04-02 | Rosemount Inc | Differential pressure transducer |
| US4398194A (en) * | 1979-04-26 | 1983-08-09 | Rosemount Engineering Company Limited | Differential pressure sensing apparatus |
| CN88101231A (en) * | 1987-03-12 | 1988-09-21 | 罗斯蒙德公司 | Isolation mounting |
-
2008
- 2008-11-24 CN CN2008102331037A patent/CN101738286B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800413A (en) * | 1969-10-27 | 1974-04-02 | Rosemount Inc | Differential pressure transducer |
| US4398194A (en) * | 1979-04-26 | 1983-08-09 | Rosemount Engineering Company Limited | Differential pressure sensing apparatus |
| CN88101231A (en) * | 1987-03-12 | 1988-09-21 | 罗斯蒙德公司 | Isolation mounting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101738286A (en) | 2010-06-16 |
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Owner name: CHONGQING CHUANYI INSTRUMENT FACTORY NO.17 CO., LT Free format text: FORMER OWNER: CHONGQING SICHUAN INSTRUMENT COMPLEX CO., LTD. Effective date: 20120515 |
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Effective date of registration: 20120515 Address after: 400700, Longfeng village, No. 7, Beibei District, Chongqing Patentee after: Chongqing Chuanyi 17 Factory Co., Ltd. Address before: 400700 Beibei District People's village, No. 1, Chongqing Patentee before: Chongqing Sichuan Instrument Complex Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: CHONGQING SICHUAN INSTRUMENT COMPLEX CO., LTD. Free format text: FORMER OWNER: CHONGQING CHUANYI 17TH FACTORY Effective date: 20141216 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141216 Address after: 400700 Beibei District People's village, No. 1, Chongqing Patentee after: Chongqing Sichuan Instrument Complex Co., Ltd. Address before: 400700, Longfeng village, No. 7, Beibei District, Chongqing Patentee before: Chongqing Chuanyi 17 Factory Co., Ltd. |