CN210243062U - Dual-redundancy differential pressure sensor - Google Patents
Dual-redundancy differential pressure sensor Download PDFInfo
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- CN210243062U CN210243062U CN201921359828.0U CN201921359828U CN210243062U CN 210243062 U CN210243062 U CN 210243062U CN 201921359828 U CN201921359828 U CN 201921359828U CN 210243062 U CN210243062 U CN 210243062U
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Abstract
The utility model belongs to the differential pressure sensor field, and discloses a dual-redundancy differential pressure sensor, which comprises a base, a connecting piece, two differential pressure sensitive elements, a blank cap, a shell and a socket; one end of the shell is connected with the base, and the other end of the shell is connected with the socket; the connecting piece and the blank cap are arranged inside the shell, the connecting piece is connected with the base, the two differential pressure sensing elements are arranged inside the connecting piece, one end of a circuit board of each differential pressure sensing element is connected with the upper surface of the blank cap, and the other end of the circuit board of each differential pressure sensing element is connected with the socket; the base is kept away from one of casing and is served and set up high-pressure end interface and low pressure end interface, and the high-pressure end interface all communicates with two differential pressure sensing element's high pressure sensing end through the high-pressure line that sets up on the base, and the low pressure end interface all communicates with two differential pressure sensing element's low pressure sensing end through the through-hole of seting up on the low pressure line that sets up on the base and the connecting piece. The utility model discloses compact structure, space are little, light in weight, can obtain two tunnel independent and the same output signal simultaneously, and measurement accuracy and uniformity homoenergetic are guaranteed.
Description
Technical Field
The utility model belongs to the technical field of differential pressure sensor, a two redundancy differential pressure sensor is related to.
Background
In the field of fluid control of aerospace, special machines and the like, differential pressure physical quantity is required to be measured for detecting the pressure difference at two ends of a system pipeline, such as an oil supply system, a lubricating system, a hydraulic system, an air pressure system and the like. Conventional differential pressure sensor can only carry out single measurement to the system under being surveyed, to measurement system's importance under operating condition, security and reliability have higher requirement, generally require same measuring point to install two differential pressure sensor and guarantee, when a trouble appears, another work is normal, when installing two differential pressure sensor simultaneously, because sensor performance itself and measuring position's difference, lead to two sensor data tests system error to appear, including two differential pressure sensor installations to the space requirement great, the weight is heavy, current differential pressure sensor can't satisfy the field operation requirement, just so need a pair of redundancy differential pressure sensor of a section to satisfy operation requirement.
Therefore, the differential pressure sensor is required to have two paths of independent differential pressure sensing elements for differential pressure measurement. When the pressure sensor works normally, A, B two paths of differential pressure sensing elements measure simultaneously, A path of differential pressure sensing element measurement data is collected, B path is standby, when one path of measurement fails, the other path is collected and switched, and the system can work normally.
The structure of the existing differential pressure transmitter is basically a symmetrical structure, a differential pressure sensor is adopted to measure a high-pressure end and a low-pressure end, the installation and connection modes are generally thread sealing structures, for differential pressure measurement of an asymmetrical structure, due to the limitation of the structure of the existing differential pressure sensor, the designed structure is complex, the direct measurement by adopting the differential pressure sensor cannot be realized, 2 static pressure sensors are generally adopted to measure high pressure and low pressure respectively, then the pressure at two ends is subjected to differential calculation to obtain a differential pressure value, the precision, the consistency and the like of the static pressure sensors in the method can influence the precision calculation of the differential pressure measurement, and therefore, the existing differential pressure transmitter cannot meet the field use requirements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a dual redundancy differential pressure sensor.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a dual-redundancy differential pressure sensor comprises a base, a connecting piece, two differential pressure sensitive elements, a blank cap, a shell and a socket; one end of the shell is connected with the base, and the other end of the shell is connected with the socket; the connecting piece and the blank cap are arranged in the shell, one end of the connecting piece is connected with the base, the other end of the connecting piece is connected with the lower surface of the blank cap, the two differential pressure sensing elements are arranged in the connecting piece, one end of a circuit board of each differential pressure sensing element is connected with the upper surface of the blank cap, and the other end of the circuit board of each differential pressure sensing element is connected with the socket; the base is kept away from one of casing and is served and set up high-pressure end interface and low pressure end interface, and the high-pressure end interface all communicates with two differential pressure sensing element's high pressure sensing end through the high-pressure line that sets up on the base, and the low pressure end interface all communicates with two differential pressure sensing element's low pressure sensing end through the through-hole of seting up on the low pressure line that sets up on the base and the connecting piece.
The utility model discloses further improvement lies in:
two low-pressure end interfaces are arranged, two low-pressure pipelines are arranged, and two through holes are formed in the connecting piece; each low-pressure pipeline is communicated with the low-pressure sensing ends of the two differential pressure sensing elements through different through holes.
A first groove is formed between the high-pressure end interface and the low-pressure end interface on the base, and a second groove is formed between the low-pressure end interface and the shell; a high-pressure end O-shaped sealing ring used for isolating the pressure of the high-pressure end and the pressure of the low-pressure end is arranged in the first groove, and a low-pressure end O-shaped sealing ring used for isolating the pressure of the low-pressure end and the external pressure is arranged in the second groove.
And an isolation O-shaped sealing ring for isolating high pressure and low pressure is arranged between the through hole of the connecting piece and the base.
And silicon rubber is filled in the shell.
The differential pressure sensing element is an MDM290 piezoresistive OEM differential pressure sensing element.
The circuit board is connected with the upper surface of the blank cap through a plurality of screws.
The shell, the base and the blank cap are all made of stainless steel.
The shell is welded with the base, the connecting piece is welded with the base, and the differential pressure sensitive element is welded with the connecting piece.
Compared with the prior art, the utility model discloses following beneficial effect has:
the two independent differential pressure sensing elements are adopted to measure the pressure difference, the two differential pressure sensing elements are arranged in the same sensor base, the high-pressure pipeline of the sensor base is communicated with the high-pressure ends of the two differential pressure sensing elements, and the high-pressure pipeline is communicated with the low-pressure ends of the two differential pressure sensing elements, so that the double-redundancy differential pressure sensor is arranged on the same test point, two independent and same electric output signals can be obtained at the same time, the measurement precision and consistency can be ensured, when one of the two differential pressure sensing elements fails, the other differential pressure sensing element is collected and switched, and the normal work of the system can be ensured. Compared with the structure comparison of two common differential pressure sensors, the structure is compact, the space is small, the weight is light, the requirement on the installation environment is lower, and the device can adapt to the more complex installation environment.
Furthermore, two low-pressure end interfaces and two low-pressure pipelines are arranged, when one low-pressure pipeline is blocked, the other low-pressure pipeline still works normally, and the stability of the whole device is improved.
Furthermore, a high-pressure end O-shaped sealing ring and a low-pressure end O-shaped sealing ring are arranged, the high-pressure end pressure and the low-pressure end pressure are isolated through the high-pressure end O-shaped sealing ring, and the low-pressure end pressure and the external pressure are isolated through the low-pressure end O-shaped sealing ring.
Furthermore, the shell is filled with silicon rubber for fixing and sealing the differential pressure sensing element and a lead between the circuit board and the socket, so that the stability is improved.
Furthermore, the shell, the base and the blank cap are made of stainless steel materials, are connected in a welding mode, have the characteristics of small volume, light weight, pressure resistance, salt mist resistance, electromagnetic interference resistance, overvoltage impact resistance and the like, and are particularly suitable for use sites with special requirements on volume, weight and installation modes.
Drawings
FIG. 1 is a schematic structural diagram of a dual redundancy differential pressure sensor of the present invention;
FIG. 2 is a front view of the dual redundancy differential pressure sensor of the present invention;
fig. 3 is a top view of the dual redundancy differential pressure sensor of the present invention;
fig. 4 is a left side view of the dual redundancy differential pressure sensor of the present invention.
Wherein: 1-a base; 2-a connector; 3-differential pressure sensitive element; 4-covering the cover; 5-a circuit board; 6-screw; 7-a housing; 8-a socket; 9-a wire; 10-silicon rubber; 11-isolating O-ring seals; 12-low pressure end O-ring seal; 13-high pressure end O-ring seal.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses dual-redundancy differential pressure sensor, including base 1, connecting piece 2, two differential pressure sensing element 3, stifle 4, screw 6, casing 7, socket 8, wire 9, silicon rubber 10, keep apart O type sealing washer 11, low pressure end O type sealing washer 12 and high-pressure end O type sealing washer 13.
Two differential pressure sensitive elements 3 are symmetrically arranged inside a connecting piece 2, the differential pressure sensitive elements 3 are welded with the connecting piece 2, the connecting piece 2 is welded with a base 1, the differential pressure sensitive elements 3 are fixed through the connecting piece 2, a circuit board 5 of the differential pressure sensitive elements 3 is fixed on the upper surface of a blank cap 4 through a plurality of screws 6, the differential pressure sensitive elements 3 are connected with the circuit board 5 through leads 9, a shell 7 is welded with the base 1, the two differential pressure sensitive elements 3, the blank cap 4, the leads 9, the shell 7, a socket 8 and the screws 6 are all positioned inside the shell, the low-pressure end of the differential pressure sensitive elements 3 is sealed through the blank cap 4, the circuit board 5 is connected with the socket 8 through the leads 9, silicon rubber 10 is encapsulated in the shell 7, the socket 8 is welded with the shell 7, an isolation O-shaped sealing ring 11 for isolating high pressure and low pressure is arranged between a through hole of the connecting piece 2, a low pressure end O-ring 12 is mounted in a second groove in the base 1. The shell, the blank cap and the base 1 are all made of stainless steel. A high-pressure pipeline and two low-pressure pipelines are arranged on the base 1, one end of the high-pressure pipeline is connected with the high-pressure sensing ends of the two differential pressure sensing elements 3, and the other end of the high-pressure pipeline is connected with a high-pressure end interface arranged on the base 1; one end of each of the two low-pressure pipelines is communicated with the low-pressure sensing end of the differential pressure sensing element 3, and the other end of each of the two low-pressure pipelines is connected with two low-pressure end interfaces arranged on the base 1.
The high-pressure end O-shaped sealing ring 13 is used for isolating the pressure of the high-pressure end from the pressure of the low-pressure end, and the low-pressure end O-shaped sealing ring 12 is used for isolating the pressure of the low-pressure end from the external pressure, so that the isolation and sealing effects are realized.
The differential pressure sensing element 3 is an MDM290 piezoresistive OEM differential pressure sensing element, and has the function of converting a differential pressure signal measured by the sensing element into an electrical signal, transmitting the electrical signal to the circuit board 5 and the socket through a lead 9, and outputting the electrical signal for responding to the differential pressure.
The base 1 is used for transmitting high pressure and low pressure measured by the outside to high pressure and low pressure ends of the differential pressure sensing element 3 through high pressure pipelines and low pressure pipelines and is connected with a fixed shell 7.
The utility model discloses a principle, dual redundancy differential pressure sensor interface have high-pressure end interface and two low-pressure end interfaces, and high-pressure end interface connection high-pressure line measures the high pressure, and low-pressure end interface connection low-pressure line measures the low pressure, keeps apart with high-pressure end O type sealing washer 13 between base 1's high-pressure end interface and the low-pressure end interface and seals, keeps apart with low-pressure end O type sealing washer 12 between base 1's low-pressure end interface and the casing 7 and seals. The integral differential pressure sensor is fixedly installed through a flange. Two independent differential pressure sensing elements 3 are adopted to measure pressure difference, two differential pressure sensing elements 3 are installed in the same sensor base 1, a high-pressure pipeline of the sensor base 1 is communicated with high-pressure ends (high-pressure membrane ends) of the two differential pressure sensing elements 3, and the high-pressure pipeline is communicated with low-pressure ends (low-pressure membrane ends) of the two differential pressure sensing elements 3, so that a dual-redundancy differential pressure sensor is installed on the same test point, two independent and same electric output signals can be obtained simultaneously, when one of the two differential pressure sensing elements fails, the other differential pressure sensing element is collected and switched, and the system can work normally.
The utility model discloses for comparing with two ordinary differential pressure sensor structures simultaneously, compact structure, space are little, light in weight, and measurement accuracy, uniformity can obtain guaranteeing. The whole shell is of a stainless steel all-welded structure, the internal circuit board is filled with silicon rubber for fixing and sealing, and the all-welded stainless steel shell has the characteristics of small size, light weight, pressure resistance, salt mist resistance, electromagnetic interference resistance, overvoltage impact resistance and the like, and is particularly suitable for use sites with special requirements on size, weight and installation modes.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (9)
1. A dual-redundancy differential pressure sensor is characterized by comprising a base (1), a connecting piece (2), two differential pressure sensitive elements (3), a blank cap (4), a shell (7) and a socket (8);
one end of the shell (7) is connected with the base (1), and the other end is connected with the socket (8); the connecting piece (2) and the blank cap (4) are arranged inside the shell (7), one end of the connecting piece (2) is connected with the base (1), the other end of the connecting piece is connected with the lower surface of the blank cap (4), the two differential pressure sensing elements (3) are arranged inside the connecting piece (2), one end of a circuit board (5) of each differential pressure sensing element (3) is connected with the upper surface of the blank cap (4), and the other end of the circuit board is connected with the socket (8);
one end of the base (1) far away from the shell (7) is provided with a high-pressure end interface and a low-pressure end interface, the high-pressure end interface is communicated with the high-pressure sensing ends of the two differential pressure sensing elements (3) through a high-pressure pipeline arranged on the base (1), and the low-pressure end interface is communicated with the low-pressure sensing ends of the two differential pressure sensing elements (3) through a through hole arranged on the low-pressure pipeline arranged on the base (1) and the connecting piece (2).
2. The dual-redundancy differential pressure sensor according to claim 1, wherein two low-pressure end interfaces are provided, two low-pressure pipelines are provided, and two through holes are formed in the connecting piece (2); each low-pressure pipeline is communicated with the low-pressure sensing ends of the two differential pressure sensing elements (3) through different through holes.
3. The dual-redundancy differential pressure sensor according to claim 1, wherein a first groove is formed between the high-pressure end interface and the low-pressure end interface on the base (1), and a second groove is formed between the low-pressure end interface and the shell (7); a high-pressure end O-shaped sealing ring (13) used for isolating the pressure of a high-pressure end and the pressure of a low-pressure end is arranged in the first groove, and a low-pressure end O-shaped sealing ring (12) used for isolating the pressure of the low-pressure end and the external pressure is arranged in the second groove.
4. The dual-redundancy differential pressure sensor according to claim 1, wherein an isolation O-ring (11) for isolating high and low pressures is provided between the through hole of the connector (2) and the base (1).
5. The dual-redundancy differential pressure sensor according to claim 1, wherein the inside of the housing (7) is filled with silicon rubber (10).
6. Dual-redundancy differential pressure sensor according to claim 1, characterized in that the differential pressure sensitive element (3) is a piezoresistive OEM differential pressure sensitive element of MDM290 type.
7. The dual-redundancy differential pressure sensor according to claim 1, wherein the circuit board (5) is connected with the upper surface of the blank cap (4) by a plurality of screws (6).
8. The dual-redundancy differential pressure sensor according to claim 1, wherein the housing (7), the base (1) and the blank cap (4) are all stainless steel.
9. The dual-redundancy differential pressure sensor according to claim 1, wherein the housing (7) is welded to the base (1), the connecting member (2) is welded to the base (1), and the differential pressure sensing element (3) is welded to the connecting member (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359828.0U CN210243062U (en) | 2019-08-20 | 2019-08-20 | Dual-redundancy differential pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359828.0U CN210243062U (en) | 2019-08-20 | 2019-08-20 | Dual-redundancy differential pressure sensor |
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| CN210243062U true CN210243062U (en) | 2020-04-03 |
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| CN201921359828.0U Active CN210243062U (en) | 2019-08-20 | 2019-08-20 | Dual-redundancy differential pressure sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947827A (en) * | 2020-10-19 | 2020-11-17 | 南京高华科技股份有限公司 | Marine high-static-pressure-resistant differential pressure measuring device, ship and measuring method |
| CN114459665A (en) * | 2022-02-10 | 2022-05-10 | 南京沃天科技股份有限公司 | Easily assemble differential pressure transmitter structure |
| CN114636506A (en) * | 2022-03-22 | 2022-06-17 | 厦门乃尔电子有限公司 | Dual-redundancy differential pressure sensor |
-
2019
- 2019-08-20 CN CN201921359828.0U patent/CN210243062U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947827A (en) * | 2020-10-19 | 2020-11-17 | 南京高华科技股份有限公司 | Marine high-static-pressure-resistant differential pressure measuring device, ship and measuring method |
| CN114459665A (en) * | 2022-02-10 | 2022-05-10 | 南京沃天科技股份有限公司 | Easily assemble differential pressure transmitter structure |
| CN114459665B (en) * | 2022-02-10 | 2023-09-26 | 南京沃天科技股份有限公司 | Differential pressure transmitter structure easy to assemble |
| CN114636506A (en) * | 2022-03-22 | 2022-06-17 | 厦门乃尔电子有限公司 | Dual-redundancy differential pressure sensor |
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