CN104316255A - Loading limit protection device of pressure sensor - Google Patents
Loading limit protection device of pressure sensor Download PDFInfo
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- CN104316255A CN104316255A CN201410543123.XA CN201410543123A CN104316255A CN 104316255 A CN104316255 A CN 104316255A CN 201410543123 A CN201410543123 A CN 201410543123A CN 104316255 A CN104316255 A CN 104316255A
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- pressure
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- membrane
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Abstract
The invention relates to a loading limit protection device of a pressure sensor. The loading limit protection device comprises a pressure measurement part and a loading limit protection part. The pressure measurement part is formed by welding a filler neck (1) and a membrane (2). An upper boss (2-1) and a lower boss (2-2) are designed on the membrane (2). A strain gauge (5) is adhered to the membrane (2) to form a bridge which converts sensed medium pressure to electric signals, and the electric signals are transmitted through a lead (6). The loading limit protection part is composed of a pressure cover (3) and a locking nut (4), and accurately controls the pressure limiting load value by adjusting the gap delta between the upper boss on the membrane (2) and the pressure cover (3). The loading limit protection device is improved on the basis of the existing sensor, the membrane (2) of the pressure measurement part is provided with the upper boss and the lower boss, the upper boss is used for limiting load protection, and the lower boss improves the compression strength of the membrane. In addition, a cavity is small in size, and the loading limit protection device is simple in the manufacturing technique and low in cost.
Description
Technical field
The invention belongs to pressure transducer manufacturing technology field, be specifically related to need the pressure transducer of accurate controlled pressure limit for tonnage value and demand fulfillment high overload simultaneously.
Background technology
Pressure transducer has a lot of parameter index, wherein has one to be overload protection, and overload is exactly that load is excessive, has exceeded the nominal load of sensor itself, and sensor construction will be caused to damage; Even if overload protection load has exceeded the situation that nominal load also there will not be damage, but also have a degree, be generally rated pressure 150% scope in, and can not sustained overload work.
Pressure transducer has a lot of form; the overload protection method for designing of often kind of version is also different; numerous method has respective merits and demerits; when designing overload protection; the methods such as general employing boss realize; but this structure generally has a significant limitation to be exactly that cavity size is comparatively large, adds the complexity of manufacturing process, improves production cost.
Overload protection often kind sensor all will be considered; because in use may occur that measured value is greater than the situation of range; only devise the sensor of overload protection, in following use procedure, just there will not be situation about damaging due to overload, could use more of a specified duration.
Goal of the invention
The present invention is designed by pressure transducer special construction, and solve existing pressure sensor overload protection device accurately limit for tonnage can not need the use occasion of high overload simultaneously.Namely be exactly: accurately measure in pressure limit at needs, normal operation of sensor, and to different service pressure values, can be met the demands by adjustment; When exceeding this pressure, sensor carries out limit for tonnage protection, and can bear high overload, the highest bear overload 7 times rated pressure and can long-term work.
Technical solution
The technical solution used in the present invention: pressure transducer load limit protective device, comprise Pressure sensing part and limit for tonnage protection part, it is characterized in that Pressure sensing part is welded by pressure inlet and diaphragm, diaphragm design has upper and lower two boss, strainometer is pasted onto and diaphragm forms the pressure medium change that diaphragm experiences by electric bridge and be converted to electric signal, and is transmitted by wire; Limit for tonnage protection part is made up of gland and set nut, by the gap delta accurately controlled pressure limit for tonnage value between adjustment diaphragm convex platform and gland.
Beneficial effect of the present invention:
1, the design of this device, existing sensor integration is improved, and pressure-sensitive parts diaphragm adopts upper and lower two boss design; convex platform is used for limit for tonnage protection, and the design of lower convex platform, improves the compressive resistance of diaphragm; cavity size is less simultaneously, and manufacturing process is simple, and cost is low.
2, the design of this device, because the gap between diaphragm convex platform and gland is adjustable, make to need the pressure limit for tonnage value of accurately control adjustable, scope is wide, instead of single fixing pressure limit for tonnage value.
3, the design of this device; when pressure medium value exceedes limit for tonnage value; diaphragm boss and gland are adjacent to; set nut and pressure inlet screwed tight simultaneously; diaphragm not redeformation; play overload protective function, the highest bear overload 7 times rated pressure overload and can long-term work, considerably beyond the overload level of general pressure transducer rated pressure 150%.
Accompanying drawing explanation
Fig. 1 is pressure transducer load limit protective device structural drawing.
Embodiment
As shown in Figure 1, pressure transducer load limit protective device comprises Pressure sensing part and limit for tonnage protection part.Pressure sensing part is formed by pressure inlet 1 and diaphragm 2 argon arc welding, and impression needs the pressure medium measured, and diaphragm 2 is designed with upper and lower two boss 2-1,2-1, and convex platform is used for the protection of pressure limit for tonnage, and lower convex platform can improve the intensity of diaphragm 2, improves overload capacity.By the distortion of diaphragm 2, experience the change of pressure, then by the electric bridge that the strainometer 5 be pasted onto on diaphragm 2 forms, the pressure medium experienced by diaphragm 2 change is converted to electric signal, is transmitted by wire 6.Limit for tonnage protection part is made up of gland 3 and set nut 4.By the gap delta between adjustment diaphragm 2 convex platform and gland 3, can accurately controlled pressure limit for tonnage value (for different limit for tonnage force value, can be met the demands by the gap delta between adjustment diaphragm 2 convex platform and gland 3), when pressure medium value exceedes this value, diaphragm 2 convex platform and gland 3 are adjacent to, set nut 4 and pressure inlet 1 screwed tight simultaneously, diaphragm 2 not redeformation, plays limit for tonnage effect; The structural design of diaphragm 2 lower convex platform adds the compressive resistance of diaphragm simultaneously, can play high overload protective effect.
Principle of work:
(see accompanying drawing 1) medium enters cavity by pressure inlet 1, and diaphragm 2 experiences the change of pressure, and produce distortion, the electric bridge be made up of the strainometer 5 be pasted onto on diaphragm, changes pressure signal into electric signal, is transmitted by wire 6; Simultaneously diaphragm 2 is out of shape on boss and moves, by the gap delta between adjustment diaphragm 2 convex platform and gland 3, and can accurately controlled pressure limit for tonnage value; Arrive this pressure limit for tonnage value, gap delta value is zero, and namely diaphragm 2 boss and gland 3 are adjacent to, and simultaneously due to set nut 4 and pressure inlet 1 screwed tight, when pressure medium value exceedes this value, diaphragm 2 also not redeformation, plays overload protective function.
In practical application: a pressure transducer measured for water depth pressure, rated pressure is 0.6MPa (being equivalent to 60 meters of depth of waters), require normally to work under 0.6MPa pressure, limit for tonnage is carried out during 0.65MPa ± 0.2MPa pressure, ensure that most high overload pressure is 4.3MPa (being equivalent to 430 meters of depth of waters, i.e. the rated pressure of 7 times) simultaneously.Employing said structure designs, by grinding diaphragm 2 convex platform and gland 3 end face, the gap delta between diaphragm 2 convex platform and gland 3 can be adjusted, limit for tonnage force value is accurately controlled within the scope of 0.65MPa ± 0.2MPa, meet normal job requirement (for different limit for tonnage force value, such as require to carry out limit for tonnage during 0.80MPa ± 0.2MPa pressure, can be met the demands by the gap delta expanded between adjustment diaphragm 2 convex platform and gland 3); Simultaneously because diaphragm 2 adopts upper and lower two boss design, when pressure is more than 0.65MPa, diaphragm 2 convex platform and gland 3 are adjacent to, diaphragm 2 not redeformation, plays limit for tonnage effect, simultaneously due to diaphragm 2 lower convex platform structural design, improve the compressive resistance of diaphragm 2, ensure that being loaded onto pressure was 4.3MPa and does not damage, and can work long hours, met the requirement of high overload.
The above is only better embodiment of the present invention, therefore all equivalences done according to structure, feature and the principle described in patent application claims scope of the present invention change or modify, and are included within the scope of patent application claims of the present invention.
Claims (1)
1. pressure transducer load limit protective device, comprise Pressure sensing part and limit for tonnage protection part, it is characterized in that Pressure sensing part is welded by pressure inlet (1) and diaphragm (2), diaphragm (2) is designed with upper and lower two boss (2-1,2-2), strainometer (5) is pasted onto and diaphragm 2 forms the pressure medium change that diaphragm (2) experiences by electric bridge and be converted to electric signal, and is transmitted by wire (6); Limit for tonnage protection part is made up of gland (3) and set nut (4), by the gap delta accurately controlled pressure limit for tonnage value between adjustment diaphragm 2 convex platform and gland 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410543123.XA CN104316255A (en) | 2014-10-14 | 2014-10-14 | Loading limit protection device of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410543123.XA CN104316255A (en) | 2014-10-14 | 2014-10-14 | Loading limit protection device of pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN104316255A true CN104316255A (en) | 2015-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410543123.XA Pending CN104316255A (en) | 2014-10-14 | 2014-10-14 | Loading limit protection device of pressure sensor |
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| CN (1) | CN104316255A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063527A (en) * | 2017-06-07 | 2017-08-18 | 上海洛丁森工业自动化设备有限公司 | A kind of passive and wireless multichannel pressure monitor system |
| CN110637217A (en) * | 2018-04-20 | 2019-12-31 | 三重机器人外饰技术研究所股份有限公司 | Contact detection device |
| CN110758779A (en) * | 2019-09-27 | 2020-02-07 | 上海空间推进研究所 | Protection device suitable for spacecraft screwed pipe connecting nozzle component |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0167941A2 (en) * | 1984-07-09 | 1986-01-15 | Siemens Aktiengesellschaft | Differential pressure gauge head |
| CN88201030U (en) * | 1988-01-28 | 1988-09-07 | 复旦大学 | Overpressure-proof type pressure transducer with rectangle dual-island silicon-film structure |
| US20030110864A1 (en) * | 2000-03-14 | 2003-06-19 | Aleksandar Vujanic | Differential-pressure measuring cell |
| CN103115720A (en) * | 2013-01-16 | 2013-05-22 | 西安交通大学 | Quartz girder resonant mode micro-pressure sensor chip with silicon substrate single island structure |
| CN103557987A (en) * | 2013-10-10 | 2014-02-05 | 软控股份有限公司 | Surface acoustic wave sensor packaging structure |
| CN203837866U (en) * | 2014-05-16 | 2014-09-17 | 常州曼淇威压力控制技术有限公司 | Multi-seal type pressure sensor |
| CN204177523U (en) * | 2014-10-14 | 2015-02-25 | 秦川机床集团宝鸡仪表有限公司 | Pressure transducer load limit protective device |
-
2014
- 2014-10-14 CN CN201410543123.XA patent/CN104316255A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0167941A2 (en) * | 1984-07-09 | 1986-01-15 | Siemens Aktiengesellschaft | Differential pressure gauge head |
| CN88201030U (en) * | 1988-01-28 | 1988-09-07 | 复旦大学 | Overpressure-proof type pressure transducer with rectangle dual-island silicon-film structure |
| US20030110864A1 (en) * | 2000-03-14 | 2003-06-19 | Aleksandar Vujanic | Differential-pressure measuring cell |
| CN103115720A (en) * | 2013-01-16 | 2013-05-22 | 西安交通大学 | Quartz girder resonant mode micro-pressure sensor chip with silicon substrate single island structure |
| CN103557987A (en) * | 2013-10-10 | 2014-02-05 | 软控股份有限公司 | Surface acoustic wave sensor packaging structure |
| CN203837866U (en) * | 2014-05-16 | 2014-09-17 | 常州曼淇威压力控制技术有限公司 | Multi-seal type pressure sensor |
| CN204177523U (en) * | 2014-10-14 | 2015-02-25 | 秦川机床集团宝鸡仪表有限公司 | Pressure transducer load limit protective device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063527A (en) * | 2017-06-07 | 2017-08-18 | 上海洛丁森工业自动化设备有限公司 | A kind of passive and wireless multichannel pressure monitor system |
| CN110637217A (en) * | 2018-04-20 | 2019-12-31 | 三重机器人外饰技术研究所股份有限公司 | Contact detection device |
| CN110758779A (en) * | 2019-09-27 | 2020-02-07 | 上海空间推进研究所 | Protection device suitable for spacecraft screwed pipe connecting nozzle component |
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Application publication date: 20150128 |
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| RJ01 | Rejection of invention patent application after publication |