CN2650100Y - Differiential pressure sensor overload protective device - Google Patents
Differiential pressure sensor overload protective device Download PDFInfo
- Publication number
- CN2650100Y CN2650100Y CN 03256344 CN03256344U CN2650100Y CN 2650100 Y CN2650100 Y CN 2650100Y CN 03256344 CN03256344 CN 03256344 CN 03256344 U CN03256344 U CN 03256344U CN 2650100 Y CN2650100 Y CN 2650100Y
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- Prior art keywords
- overload
- sensor
- differential pressure
- pressure
- diaphragm
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- Expired - Lifetime
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Abstract
The utility model relates to an overload protective device of a differential pressure sensor, which comprises diaphragm bases (1), pressing plates (2), a base (4), isolation diaphragms (6), a silicon pressure sensor (7), locating disks (8) and silicone oil (10). The utility model is characterized in that the two sides of the sensor (7) are sequentially provided with overload diaphragms (3), discs (9) and dish-shaped reeds (5) from inside to outside. When overload pressure exists, the dish-shaped reeds (5) are compressed and distorted and the overload diaphragms generate certain displacement, making the isolation diaphragms (6) fitted closely against the diaphragm bases (1) under the action of the overload pressure. Within the normal working range of the differential pressure sensor, the dish-shaped reeds are not compressed and distorted and the displacement of the overload diaphragms is minimum. The differential pressure sensor has excellent performance. When the differential pressure exceeds the largest working range of the sensor, the overload protective device takes the action to make the differential pressure put on the sensor smaller than the overload limit, and guarantees that the sensor is not damaged.
Description
Technical field
The utility model relates to the equipment or the instrument of two pressure difference values of a kind of measurement, relates to a kind of overload protection arrangement of using the differential pressure pick-up of pressure-active element concretely.
Background technology
At present, domestic diffuse si differential pressure transmitter mainly is to rely on import, and the single-track overload problem of its core technology diffuse si sensor does not have fine solution.For example Chinese utility application numbers 89106651.9, publication number 1040682, name is called " differential pressure pick-up ", a kind of differential pressure pick-up is disclosed, described differential pressure pick-up comprises: two pressure that are arranged in object both sides receive film, the object fixed outside has two definite grooves, is full of pressure transmission medium in the groove; Be arranged in two central modes between the pressure reception film, so just determined to have two case chambers, fill into pressure transmission medium at this interior of articles; Two main transmission channels are transmitted between two case chambers and two grooves respectively; Two secondary transmission channels are transmitted the pressure of these two case chambers; Also comprise: a differential pressure sensitive element of two pressure survey chambers is housed, receives these two secondary transmission channels and convert electric signal to these two pressure that groove transmitted and the differential pressure of these two pressure.But; all can the performance of transmitter be exerted an influence because the Tai Gaotai of overload protection point hangs down, and it is also many to influence the factor of overload protection point, as the crudy of diaphragm seat and pedestal and charge control of oil mass or the like; above-mentioned patent structure is too complicated, sets relatively difficulty of overload protection point.
Summary of the invention
The purpose of this utility model is in order to have overcome the too complicated shortcoming of existing differential pressure pick-up overload protecting mechanism, provides a kind of simple in structure, overload protection value to set differential pressure pick-up overload protection arrangement easily.
In order to realize the purpose of this utility model, the technical solution adopted in the utility model; A kind of differential pressure pick-up overload protection arrangement; device integral body includes diaphragm seat, pressing plate, pedestal, isolation diaphragm, silicon pressure sensor, positioning disk and silicone oil; it is characterized in that described sensor both sides be equipped with successively from inside to outside the overload diaphragm, disk and dish-like reed; dish-like reed generation compression deformation when having overload pressure; the overload diaphragm will produce certain displacement, make isolation diaphragm be close to the diaphragm seat under the overload pressure effect.
The beneficial effects of the utility model are, in the normal range of operation of differential pressure pick-up, dish-like reed does not produce compression deformation, and the overload diaphragm displacement is minimum, and differential pressure pick-up has good performance.When pressure reduction surpassed the maximum functional range of sensor, overload protecting mechanism worked, and makes the suffered differential pressure of sensor less than its overload limit, guaranteed that sensor is not broken.The rigidity test of overload reed shows that each sheet reed all can satisfy the requirement of overload protection in the utility model, can guarantee the symmetry that positive/negative pressure both sides pressure transmits again.Correct design, rational technology make overload mechanism can play sufficient protective effect to the silicon chip in the sensor, also are difficult for being broken even transmitter is in unidirectional static pressure state.
Description of drawings
Fig. 1 is a differential pressure pick-up overload protection arrangement structural representation.
Embodiment
Describe in further detail below in conjunction with 1 pair of the utility model of accompanying drawing: a kind of differential pressure pick-up overload protection arrangement; device integral body includes diaphragm seat (1); pressing plate (2); pedestal (4); isolation diaphragm (6); silicon pressure sensor (7); positioning disk (8) and silicone oil (10); it is characterized in that described sensor (7) both sides be equipped with successively from inside to outside the overload diaphragm (3); disk (9) and dish-like reed (5); this three constitutes overload protecting mechanism; as shown in Figure 1; dish-like reed (5) compression deformation when having overload pressure; overload diaphragm (3) will produce certain displacement, make isolation diaphragm (6) be close to diaphragm seat (1) under the overload pressure effect.Dish-like reed is subjected to certain pretightning force, and under the operate as normal measurement range, overload protecting mechanism does not have displacement.When tested differential pressure surpassed the maximum range of silicon pressure sensor, overload protecting mechanism worked.Along with the increase of differential pressure, the pressure that high-pressure side overload diaphragm passes to dish-like reed increases, and dish-like reed produces compressive deformation, and the overload diaphragm produces certain displacement to the low-pressure side direction, makes the high-pressure side isolation diaphragm to be close to the diaphragm seat behind the pressurized.The pressure that surpasses the silicon pressure sensor overload level is born by the diaphragm seat, no longer to sensor generation effect.Pressure reduction falls back to normal range of operation when the silicon pressure sensor both sides, and protection mechanism returns the normal position, and differential pressure pick-up returns normal condition.
Claims (1)
1. differential pressure pick-up overload protection arrangement; device integral body includes diaphragm seat (1), pressing plate (2), pedestal (4), isolation diaphragm (6), silicon pressure sensor (7), positioning disk (8) and silicone oil (10); it is characterized in that described sensor (7) both sides be equipped with successively from inside to outside the overload diaphragm (3), disk (9) and dish-like reed (5); compression deformation takes place in dish-like reed (5) when having overload pressure; overload diaphragm (3) will produce certain displacement, make isolation diaphragm (6) be close to diaphragm seat (1) under the overload pressure effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256344 CN2650100Y (en) | 2003-08-06 | 2003-08-06 | Differiential pressure sensor overload protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256344 CN2650100Y (en) | 2003-08-06 | 2003-08-06 | Differiential pressure sensor overload protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2650100Y true CN2650100Y (en) | 2004-10-20 |
Family
ID=34328758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03256344 Expired - Lifetime CN2650100Y (en) | 2003-08-06 | 2003-08-06 | Differiential pressure sensor overload protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2650100Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048797A (en) * | 2013-03-12 | 2014-09-17 | 福建上润精密仪器有限公司 | High-overload-resistant structure protecting pressure/differential-pressure transmitters |
| CN104062063A (en) * | 2013-03-20 | 2014-09-24 | 福建上润精密仪器有限公司 | Novel high-overload-resistant pressure device for pressure/differential pressure transmitter |
| CN104266789A (en) * | 2014-10-28 | 2015-01-07 | 黑龙江大学 | Liquid pressure difference sensation method realized based on fiber bragg grating magnetic transmission pressure difference sensor |
| CN106124116A (en) * | 2016-07-27 | 2016-11-16 | 安费诺(常州)连接***有限公司 | For detecting pressure transducer and the method for opposing liquid freezing and expansion pressure thereof of hydraulic pressure |
| CN106546377A (en) * | 2015-09-18 | 2017-03-29 | 泰科思股份有限公司 | Pressure-gradient transducer component with overload protection |
| CN106979840A (en) * | 2017-02-23 | 2017-07-25 | 南京沃天科技有限公司 | Using Welding and with overload protection function differential pressure pick-up |
| 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 |
-
2003
- 2003-08-06 CN CN 03256344 patent/CN2650100Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048797A (en) * | 2013-03-12 | 2014-09-17 | 福建上润精密仪器有限公司 | High-overload-resistant structure protecting pressure/differential-pressure transmitters |
| CN104062063A (en) * | 2013-03-20 | 2014-09-24 | 福建上润精密仪器有限公司 | Novel high-overload-resistant pressure device for pressure/differential pressure transmitter |
| CN104266789A (en) * | 2014-10-28 | 2015-01-07 | 黑龙江大学 | Liquid pressure difference sensation method realized based on fiber bragg grating magnetic transmission pressure difference sensor |
| CN106546377A (en) * | 2015-09-18 | 2017-03-29 | 泰科思股份有限公司 | Pressure-gradient transducer component with overload protection |
| CN106124116A (en) * | 2016-07-27 | 2016-11-16 | 安费诺(常州)连接***有限公司 | For detecting pressure transducer and the method for opposing liquid freezing and expansion pressure thereof of hydraulic pressure |
| CN106979840A (en) * | 2017-02-23 | 2017-07-25 | 南京沃天科技有限公司 | Using Welding and with overload protection function differential pressure pick-up |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130806 Granted publication date: 20041020 |