CN103292935B - Pressure sensor - Google Patents
Pressure sensor Download PDFInfo
- Publication number
- CN103292935B CN103292935B CN201310182451.7A CN201310182451A CN103292935B CN 103292935 B CN103292935 B CN 103292935B CN 201310182451 A CN201310182451 A CN 201310182451A CN 103292935 B CN103292935 B CN 103292935B
- Authority
- CN
- China
- Prior art keywords
- pressure chip
- ring
- pressure
- lower house
- chip
- 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.)
- Active
Links
Abstract
The invention relates to a pressure sensor. By the pressure sensor, technical problems of large zero drifting and zero temperature drifting of an existing sensor, inaccuracy and poor reliability of data detected by the existing sensor and short service life of the existing sensor are solved. The pressure sensor comprises a lower shell. A pressure chip is arranged inside the lower shell, a clamp ring is arranged on the pressure chip, an upper shell and a plug are arranged on the upper portion of the lower shell, a positioning protrusion is arranged in the middle of the inside of the lower shell, a supporting protrusion is arranged on the positioning protrusion, a sealing ring is arranged on the supporting protrusion, and the positioning protrusion, the supporting protrusion and the sealing ring are arranged in an inner cavity of the pressure chip. The pressure sensor can be sealed.
Description
Technical field
The present invention relates to a kind of sensing element, especially a kind of pressure transducer.
Background technology
As shown in Figure 1, existing pressure transducer, be provided with lower house, lower house is provided with interface thread, is provided with tracting pressuring hole in the middle of interface thread, lower house inside is provided with pressure chip, be provided with O-ring seal between pressure chip bottom surface and lower house inner bottom surface, pressure chip is provided with hold-down ring, compaction pressure chip, lower house top is provided with upper shell and plug, and the extension line on pressure chip is connected with the plug on upper shell.
This pressure transducer, owing to being provided with O-ring seal between pressure chip bottom surface and lower house inner bottom surface, when tightening the hold-down ring on pressure chip, O-ring seal will be compressed power and twisting stress, retroaction is to pressure chip again for force of compression and twisting stress, and build-up of pressure chip is subject to irregular compressive stress and twisting stress; When tightening the hold-down ring of each sensor, can not ensure that O-ring seal decrement is consistent, also the compressive stress that is subject to of build-up of pressure chip is also different simultaneously; When sensor uses, O-ring seal also can be aging, also causes the change of compressive stress; The force of compression of this continuous change and twisting stress all can cause the zero point drift of pressure chip and zero temperature drift comparatively large, cause sensor prohibited data detection really, poor reliability, life-span be short.
Summary of the invention
The present invention be exactly to solve the zero point drift of existing pressure transducer and zero temperature drift large, sensor prohibited data detection really, poor reliability, life-span short technical matters, provide a kind of zero point drift of pressure transducer and zero temperature drift is little, sensor detects the pressure transducer packoff that data are accurate, reliability is high, the life-span is long.
For this reason, the present invention is provided with lower house, lower house is provided with interface thread, tracting pressuring hole is provided with in the middle of interface thread, lower house inside is provided with pressure chip, pressure chip is provided with hold-down ring, compaction pressure chip, lower house top is provided with upper shell and plug, and the extension line on pressure chip is connected with the plug on upper shell, and main structure is, lower house bosom is provided with positioning convex, positioning convex is provided with support protrusion, and support protrusion is provided with O-ring seal, and positioning convex, support protrusion and O-ring seal are located in pressure chip internal cavity.
The present invention further preferred technical scheme is, is provided with isolation nylon ring between pressure chip upper surface and the inner seal face of hold-down ring.
The present invention further preferred technical scheme is, is provided with the gap of 0.1-0.4mm between the inner seal face of hold-down ring and pressure chip upper surface.
The present invention further preferred technical scheme is, is provided with the gap of 0.1-0.4mm between the inner seal face of hold-down ring and isolation nylon ring.
The invention has the beneficial effects as follows, because lower house bosom is provided with positioning convex, positioning convex is provided with support protrusion, support protrusion is provided with O-ring seal, positioning convex, support protrusion and O-ring seal are arranged in pressure chip internal cavity, O-ring seal is only subject to the snap-in force of support protrusion and pressure chip internal cavity medial surface, produce naturally distortion, other twisting stress can not be subject to, also variation with temperature does not produce other stress, do not have vicissitudinous impact to pressure chip, pressure chip is stressed constant, and zero point stability, zero temperature drift are stable; During batch production, the rear consistance of each sensor assembling is good, good stability, the signal stabilization detected during use; Again owing to being provided with isolation nylon ring between pressure chip upper surface and the inner seal face of hold-down ring, after tightening hold-down ring, hold-down ring inner seal face and pressure chip upper surface or isolate the gap being provided with 0.1-0.4mm between nylon ring, when changing frequently appears in temperature, pressure chip independently can discharge the stress expanding with heat and contract with cold and produce, and further ensures sensor and detects the advantage that data are accurate, reliability is high, the life-span is long.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing pressure transducer;
Fig. 2 is the structural representation of the embodiment of the present invention.
Symbol description in figure:
1. interface thread; 2. tracting pressuring hole; 3. lower house; 4. positioning convex; 5. stress chip; 6. support protrusion; 7. O-ring seal; 8. hold-down ring; 9. isolate nylon ring; 10. extension line; 11. upper shells; 12. plugs.
Embodiment
Strain gauge as shown in Figure 2, be provided with lower house 3, lower house 3 is provided with interface thread 1, tracting pressuring hole 2 is provided with in the middle of interface thread 1, lower house 3 inside is provided with pressure chip 5, pressure chip 5 is provided with hold-down ring 8, hold-down ring 8 compaction pressure chip 5, lower house 3 top is provided with upper shell 11 and plug 12, extension line 10 on pressure chip 5 is connected with the plug 12 on upper shell 11, can find out in figure, lower house 3 bosom is provided with positioning convex 4, positioning convex 4 is provided with support protrusion 6, support protrusion 6 is provided with O-ring seal 7, positioning convex 4, support protrusion 6 and O-ring seal 7 are arranged in pressure chip 5 internal cavity, also can find out in figure, be provided with between pressure chip 5 upper surface and the inner seal face of hold-down ring 8 and isolate nylon ring 9, after tightening hold-down ring 8, the inner seal face of hold-down ring 8 and pressure chip 5 upper surface or isolate the gap being provided with 0.1-0.4mm between nylon ring 9.
Because lower house 3 bosom is provided with positioning convex 4, positioning convex 4 is provided with support protrusion 6, support protrusion 6 is provided with O-ring seal 7, positioning convex 4, support protrusion 6 and O-ring seal 7 are arranged in pressure chip internal cavity, O-ring seal 7 is only subject to the snap-in force of support protrusion 6 and pressure chip 5 internal cavity medial surface, produce naturally distortion, other twisting stress can not be subject to, also variation with temperature does not produce other stress, vicissitudinous impact is not had to pressure chip 5, pressure chip 5 is stressed constant, and zero point stability, zero temperature drift are stable; During batch production, the rear consistance of each sensor assembling is good, good stability, the signal stabilization detected during use; Nylon ring 9 is isolated again owing to being provided with between pressure chip 5 upper surface and the inner seal face of hold-down ring 8, after tightening hold-down ring 8, the inner seal face of hold-down ring 8 and pressure chip 5 upper surface or isolate the gap being provided with 0.1-0.4mm between nylon ring 9, when changing frequently appears in temperature, pressure chip 5 independently can discharge the stress expanding with heat and contract with cold and produce, and further ensures sensor and detects the advantage that data are accurate, reliability is high, the life-span is long; Isolate that nylon ring 9 also ensure that the lead-in wire of pressure chip inside, pin can not encounter inside hold-down ring 8 simultaneously; avoid the quality problems such as short circuit; when impacting when being under pressure; also buffer action is played; the impulsive force that compensator or trimmer pressure chip 5 is subject to; protection pressure chip, increases its life-span, improves its reliability.
Claims (4)
1. a pressure transducer, be provided with lower house, lower house is provided with interface thread, tracting pressuring hole is provided with in the middle of interface thread, lower house inside is provided with pressure chip, pressure chip is provided with extension line, pressure chip top is provided with hold-down ring, lower house top is provided with upper shell and plug, extension line on pressure chip is connected with plug, it is characterized in that: lower house bosom is provided with positioning convex, and positioning convex is provided with support protrusion, support protrusion is provided with O-ring seal, and positioning convex, support protrusion and O-ring seal are located in pressure chip internal cavity.
2. pressure transducer according to claim 1, is characterized in that being provided with isolation nylon ring between the upper surface of described pressure chip and the inside seal face of described hold-down ring.
3. pressure transducer according to claim 1 and 2, is characterized in that the gap being provided with 0.1-0.4mm between the seal face of described hold-down ring inside and the upper surface of described pressure chip.
4. pressure transducer according to claim 1 and 2, is characterized in that the gap being provided with 0.1-0.4mm between the seal face of described hold-down ring inside and described isolation nylon ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310182451.7A CN103292935B (en) | 2013-05-17 | 2013-05-17 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310182451.7A CN103292935B (en) | 2013-05-17 | 2013-05-17 | Pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103292935A CN103292935A (en) | 2013-09-11 |
| CN103292935B true CN103292935B (en) | 2015-05-13 |
Family
ID=49094180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310182451.7A Active CN103292935B (en) | 2013-05-17 | 2013-05-17 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103292935B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772782A (en) * | 2015-04-09 | 2015-07-15 | 河南职业技术学院 | Control system of circle cutting machine |
| CN108918022A (en) * | 2018-05-30 | 2018-11-30 | 威海泰航信息科技有限公司 | pressure sensor |
| CN116380330B (en) * | 2023-05-31 | 2023-10-24 | 成都凯天电子股份有限公司 | Liquid-free piezoresistive silicon carbide pressure sensor for high temperature |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105619A (en) * | 1985-07-23 | 1987-03-04 | 株式会社日立制作所 | The method of pressure transducer and setting pressure sensor |
| EP1431733A1 (en) * | 2002-12-20 | 2004-06-23 | Texas Instruments Incorporated | Hermetic pressure transducer with internal spring contacts |
| CN202182727U (en) * | 2011-06-28 | 2012-04-04 | 浙江盾安禾田金属有限公司 | Connecting structure of sensor and pressure sensor employing the same |
| CN202329917U (en) * | 2011-11-18 | 2012-07-11 | 郑州煤矿机械集团股份有限公司 | Mining intrinsically-safe pressure sensor |
| CN203241178U (en) * | 2013-05-17 | 2013-10-16 | 唐晓刚 | Pressure sensor |
-
2013
- 2013-05-17 CN CN201310182451.7A patent/CN103292935B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105619A (en) * | 1985-07-23 | 1987-03-04 | 株式会社日立制作所 | The method of pressure transducer and setting pressure sensor |
| EP1431733A1 (en) * | 2002-12-20 | 2004-06-23 | Texas Instruments Incorporated | Hermetic pressure transducer with internal spring contacts |
| CN202182727U (en) * | 2011-06-28 | 2012-04-04 | 浙江盾安禾田金属有限公司 | Connecting structure of sensor and pressure sensor employing the same |
| CN202329917U (en) * | 2011-11-18 | 2012-07-11 | 郑州煤矿机械集团股份有限公司 | Mining intrinsically-safe pressure sensor |
| CN203241178U (en) * | 2013-05-17 | 2013-10-16 | 唐晓刚 | Pressure sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103292935A (en) | 2013-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103292935B (en) | Pressure sensor | |
| CN105547855A (en) | In-situ shale brittleness test device and method based on acoustic emission technique | |
| CN203241178U (en) | Pressure sensor | |
| CN102435378A (en) | Compound type temperature pressure sensor | |
| CN103647179A (en) | Sealed wall outlet electrical connector | |
| CN103712729A (en) | Non-welding-sealed pressure sensor | |
| CN202631163U (en) | Inner hole sealing structure of ceramic pressure sensor | |
| CN204679199U (en) | Split type sputtered thin film pressure transducer | |
| CN203133110U (en) | Resistance strain type acceleration sensor | |
| CN218916661U (en) | Pressure sensor | |
| CN202119635U (en) | High voltage breaker mechanical characteristic testing device | |
| CN205138699U (en) | Wainscot formula is drawn to press and is turned round special sensor | |
| CN203534741U (en) | Piezoresistive pressure sensor integrated base with oil charge pipe | |
| CN201396141Y (en) | Novel insulating short piece | |
| CN203929309U (en) | A kind of pressure unit that detects mud pressure | |
| CN108871654A (en) | The floated pressure sensor of hard flat membrane | |
| CN208621234U (en) | The floated pressure sensor of hard flat membrane | |
| CN203893976U (en) | Pressure sensor used for large-scale diesel engine | |
| CN104848983A (en) | Electronic pressure transducer | |
| CN204679198U (en) | Easy assembling type sputtered thin film pressure transducer | |
| CN203037400U (en) | Push rod type pressure transducer | |
| CN102466451A (en) | Special inspecting tool for distance between end faces of crankshaft hole and cylinder hole for cylinder measurement | |
| CN202453136U (en) | Novel capacitance pole plate suspension structure of differential metal capacitance diaphragm capsule | |
| CN204361231U (en) | A kind of cavity body filter | |
| CN204944738U (en) | A kind of protected against explosion automotive natural gas pressure tank sensor base |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 264500 Rushan, Shandong, Castle Peak Road, No. 157, No. Applicant after: Tang Xiaogang Address before: 264209 Weihai high tech Zone, Shandong Torch Road, No. 156 Applicant before: Tang Xiaogang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 264209 WEIHAI, SHANDONG PROVINCE TO: 264500 WEIHAI, SHANDONG PROVINCE |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170307 Address after: 264209 Shandong city of Weihai province Shenyang District Road No. 108 building 106 innovation Patentee after: Weihai sailing Electromechanical Technology Co., Ltd. Address before: 264500 Rushan, Shandong, Castle Peak Road, No. 157, No. Patentee before: Tang Xiaogang |