CN204439270U - A kind of novel differential pressure transmitter - Google Patents
A kind of novel differential pressure transmitter Download PDFInfo
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- CN204439270U CN204439270U CN201520070876.3U CN201520070876U CN204439270U CN 204439270 U CN204439270 U CN 204439270U CN 201520070876 U CN201520070876 U CN 201520070876U CN 204439270 U CN204439270 U CN 204439270U
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- barrier film
- differential pressure
- admission line
- pressure transmitter
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Abstract
The utility model relates to a kind of novel differential pressure transmitter, comprise housing, PCB and diffuse si chip is provided with in described housing, described housing is also provided with admission line, on described admission line, this only has counter-infiltration barrier film, and described counter-infiltration barrier film optionally can filter out the corrosion factor detected in medium.The utility model utilizes counter-infiltration barrier film to filter corrosion factor in medium; protect PCB not to be damaged; medium before the air inlet elongated hole simultaneously arranged on admission line makes filtration can not cause jet and turbulent flow in the air elongated; make not have more gas exchanges in transmitter; to reach the relatively independent of gas in transmitter, infiltration is repeatedly avoided to cause the increase of separate cavities internal corrosion sex factor.
Description
Technical field
The utility model belongs to surveying instrument technical field, specifically, relates to a kind of differential pressure transmitter.
Background technology
Differential pressure transmitter is a kind of sensor the most conventional in industrial practice, it is widely used in various industrial automatic control environment, relates to numerous industries such as water conservancy and hydropower, railway traffic, intelligent building, production automatic control, Aero-Space, military project, petrochemical industry, oil well, electric power, boats and ships, lathe, pipeline.Differential pressure transmitter is liquid level, density and pressure for measuring liquid, gas or steam, then pressure signal is transformed into 4 ~ 20mA direct current (Direct Current, DC) signal and exports.
Current differential pressure transmitter, if the medium measured is with weak erosive medium, generally can adopt oil-filled isolation, or adopts two pressure core to install back-to-back, is then amplified by the signal of two sensors and asks difference.But these two schemes have certain defect: (1) increases differential pressure transmitter structural volume, add the volume that pcb board is fixing, make one-piece construction become large, increase manufacturing cost; (2) add the length of line between weak signal and amplifying circuit, add the possibility be disturbed, have impact on the level of electromagnetic compatibility (EMC); (3) under strenuous vibration, the possibility that PCB and wire break down strengthens.According to flexible PCB, High-current output type can not be made, because the heat of High-current output is not easy to distribute.
These two schemes, both can bring the significantly increase of cost, also bring the increase of structure and volume.This, to cost and the high automotive field of volume requirement, adds very large difficulty.
Because above-mentioned defect, the design people, actively in addition research and innovation, to founding a kind of automatic control, without the need to manual operation, the scraper automatic control system ensureing product yields, make it have more value in industry.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model provides a kind of pressure difference transmitter by corrosion factor in counter-infiltration barrier film filter medium.
For realizing above object, the technical solution of the utility model is as follows:
A kind of novel differential pressure transmitter, comprise housing, PCB and diffuse si chip is provided with in described housing, described housing is also provided with admission line, it is characterized in that: described admission line is provided with counter-infiltration barrier film, described counter-infiltration barrier film optionally can filter out the corrosion factor detected in medium.
Further, described admission line is provided with air inlet elongated hole, described counter-infiltration barrier film is positioned at above described air inlet elongated hole.
Further, described diffuse si chip is attached in described PCB for counter.
Further, the material of measuring media is depended in the selection of the material of described counter-infiltration barrier film.
By such scheme, the beneficial effects of the utility model are:
(1) utilize counter-infiltration barrier film to filter corrosion factor in medium, protect PCB and be not damaged;
(2) medium before utilizing the air inlet elongated hole arranged on admission line to make filtration can not cause jet and turbulent flow in the air elongated, make not have more gas exchanges in transmitter, to reach the relatively independent of gas in transmitter, infiltration is repeatedly avoided to cause the increase of separate cavities internal corrosion sex factor.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 the utility model structural representation
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, for structural representation of the present utility model, the utility model comprises housing 1, be arranged on PCB 5 and the diffuse si chip 6 of housing 1 inside, wherein diffuse si chip 6 is posted in PCB 5 for counter, the bridge road part of diffuse si chip 6 can be made like this back to the medium entered in differential pressure transmitter, the effect of protection bridge road and circuit can be played; Housing 1 is also provided with admission line 2, it is air inlet elongated hole 3 above admission line 2, air inlet elongated hole 3 can make the medium before filtering can not cause jet and turbulent flow in elongated hole, make not have more gas exchanges in transmitter, to reach the relatively independent of gas in transmitter, infiltration is repeatedly avoided to cause the increase of separate cavities internal corrosion sex factor; Air inlet elongated hole 3 is provided with counter-infiltration barrier film 4, counter-infiltration barrier film 4 can filter out the corrosion factor in medium, make the gas contacting PCB 5 and diffuse si chip 6 clean, can not cause damage, the selection of counter-infiltration barrier film 4 material is selected according to the medium difference entered.
The above is only preferred implementation of the present utility model; be not limited to the utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (4)
1. a novel differential pressure transmitter, comprise housing (1), PCB (5) and diffuse si chip (6) is provided with in described housing (1), described housing (1) is also provided with admission line (2), it is characterized in that: described admission line (2) is provided with counter-infiltration barrier film (4), described counter-infiltration barrier film (4) optionally can filter out the corrosion factor detected in medium.
2. a kind of novel differential pressure transmitter according to claim 1, it is characterized in that: described admission line (2) is provided with air inlet elongated hole (3), described counter-infiltration barrier film (4) is positioned at described air inlet elongated hole (3) top.
3. a kind of novel differential pressure transmitter according to claim 1, is characterized in that: described diffuse si chip (6) is attached in described PCB (5) for counter.
4. a kind of novel differential pressure transmitter according to claim 1, is characterized in that: the material of measuring media is depended in the selection of the material of described counter-infiltration barrier film (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520070876.3U CN204439270U (en) | 2015-01-30 | 2015-01-30 | A kind of novel differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520070876.3U CN204439270U (en) | 2015-01-30 | 2015-01-30 | A kind of novel differential pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204439270U true CN204439270U (en) | 2015-07-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520070876.3U Active CN204439270U (en) | 2015-01-30 | 2015-01-30 | A kind of novel differential pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204439270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928655A (en) * | 2016-04-15 | 2016-09-07 | 孙拓夫 | Differential pressure sensor and manufacturing method therefor |
-
2015
- 2015-01-30 CN CN201520070876.3U patent/CN204439270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928655A (en) * | 2016-04-15 | 2016-09-07 | 孙拓夫 | Differential pressure sensor and manufacturing method therefor |
| CN105928655B (en) * | 2016-04-15 | 2020-02-21 | 芜湖致通汽车电子有限公司 | Differential pressure sensor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |