CN111649866A - Differential pressure sensor - Google Patents
Differential pressure sensor Download PDFInfo
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- CN111649866A CN111649866A CN202010459493.0A CN202010459493A CN111649866A CN 111649866 A CN111649866 A CN 111649866A CN 202010459493 A CN202010459493 A CN 202010459493A CN 111649866 A CN111649866 A CN 111649866A
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- pressure
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- 238000007789 sealing Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The application provides a differential pressure sensor, differential pressure sensor includes: a housing having an accommodating space; the pressure difference sensing part and the pressure leading pipeline are arranged in the accommodating space; the two opposite end parts of the differential pressure sensing part are respectively connected with the pressure guiding pipelines, the ends of the pressure guiding pipelines, which are far away from the differential pressure sensing part, are provided with pressure guiding ports, two adjacent surfaces of one side, which is far away from the differential pressure sensing part, of the shell are respectively provided with openings, and the pressure guiding ports are in one-to-one correspondence connection with the openings. Through the mode, the structural design of the external pressure interface of the differential pressure sensor is simplified, the product volume is greatly reduced on the premise of ensuring the test precision of the differential pressure sensor and the use temperature zone, more choices are provided for the pressure leading port selection of a superior system, and the system can flexibly select the external pressure interface of the differential pressure sensor according to the actual requirement of the overall structure.
Description
Technical Field
The application relates to the technical field of pressure sensors, in particular to a differential pressure sensor.
Background
A differential pressure sensor is a sensor used to measure the difference between two pressures, and is typically used to measure the pressure difference across the front and back of a device or component. Along with the higher and higher integration degree of the system, the requirement for realizing the measurement of the pressure difference values of different media by replacing two pressure sensors with a single pressure difference sensor is more and more, and the system also provides higher requirements for the volume, the weight, the working temperature area, the precision and the like of the pressure difference sensor.
The pressure difference sensor based on silicon piezoresistance principle can realize the measurement of pressure difference by using a single pressure difference core body. The differential pressure sensor has wide use temperature area and high precision, but the sensor has larger volume and heavier weight due to the existence of the pressure leading pipelines at the external high-pressure end and the low-pressure end, and can not completely meet the use requirement of the system.
In view of the above, the above drawbacks of the prior art are overcome, and a differential pressure sensor is provided to solve the current drawbacks.
Disclosure of Invention
It is an object of the present application to address the above-mentioned deficiencies of the prior art and to provide a differential pressure sensor.
The object of the application can be achieved by the following technical measures:
in order to achieve the above object, the present application provides a differential pressure sensor including a housing having a receiving space; the pressure difference sensing part and the pressure leading pipeline are partially arranged in the accommodating space;
the two opposite end parts of the differential pressure sensing component are respectively provided with the pressure guiding pipelines, the ends of the pressure guiding pipelines, which are far away from the differential pressure sensing component, are provided with pressure guiding ports, two adjacent surfaces of one side, which is far away from the differential pressure sensing component, of the shell are respectively provided with openings, and the pressure guiding ports are in one-to-one correspondence connection with the openings.
Preferably, the pressure difference sensing component comprises a pressure difference chip with two pressure ends arranged oppositely and pressure sensing parts respectively arranged at the two pressure ends, and the pressure sensing parts are connected with the pressure leading pipelines in a one-to-one correspondence manner.
Preferably, the differential pressure sensing part further includes a sealing portion provided between the differential pressure sensing chip and the pressure sensing portion.
Preferably, the sealing portion includes a sealing ring surrounding the pressure end of the pressure difference sensing chip, and the sealing ring is O-shaped.
Preferably, the housing includes a pressure connector for receiving one of the pressure sensing parts and a pressure adapter for receiving the other pressure sensing part and connected to the pressure connector,
the trompil is located on the pressure adapter, pressure connects last sense splenium one side is equipped with first pipeline, first pipeline is followed pressure connects to the pressure adapter extends, be equipped with in the pressure adapter and connect first pipeline and one of them the second pipeline of trompil and connect respectively and locate the pressure adapter sense splenium and another the third pipeline of trompil, first pipeline with the second pipeline constitutes one of them the pressure pipeline, the third pipeline constitutes another the pressure pipeline.
Preferably, the pressure joint further comprises a cavity communicated with the first accommodating space, and the cavity is connected with the pressure sensing part and the first pipeline.
Preferably, the first pipe is L-shaped.
Preferably, the pressure joint with the pressure adapter all is equipped with the screw, the pressure joint with the pressure adapter passes through the nut screw spiro union.
The beneficial effect of this application is for providing a differential pressure sensor, differential pressure sensor includes: a housing having an accommodating space; the pressure difference sensing part and the pressure leading pipeline are arranged in the accommodating space; the two opposite end parts of the differential pressure sensing part are respectively connected with the pressure guiding pipelines, the ends of the pressure guiding pipelines, which are far away from the differential pressure sensing part, are provided with pressure guiding ports, two adjacent surfaces of one side, which is far away from the differential pressure sensing part, of the shell are respectively provided with openings, and the pressure guiding ports are in one-to-one correspondence connection with the openings. Through the mode, the structural design of the external pressure interface of the differential pressure sensor is simplified, the product volume is greatly reduced on the premise of ensuring the test precision of the differential pressure sensor and the use temperature zone, more choices are provided for the pressure leading port selection of a superior system, and the system can flexibly select the external pressure interface of the differential pressure sensor according to the actual requirement of the overall structure.
Drawings
Fig. 1 is a schematic structural diagram of a differential pressure sensor according to an embodiment of the present application.
Fig. 2 is an exploded view of a differential pressure sensor according to an embodiment of the present invention.
FIG. 3 is a perspective view of a pressure fitting in the differential pressure sensor of FIG. 1 of the present application.
FIG. 4 is a perspective view of a pressure adapter of the differential pressure sensor of FIG. 1 of the present application.
Fig. 5 is a cross-sectional view of the pressure fitting of fig. 2 of the present application.
Description of the drawings: a housing 1; a pressure joint 11; a pressure adapter 12; a first opening 121; a second opening 122; a first accommodating space A; a cavity B; a pressure sensing part 2; a differential pressure chip 21; a pressure-sensitive part 22; a first pressure-sensitive part 221; a second pressure sensing part 222; a pressure introduction pipe 3; a first duct 31; a second conduit 32; a third conduit 33.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to make the description of the present disclosure more complete and complete, the following description is given for illustrative purposes with respect to the embodiments and specific examples of the present application; it is not intended to be the only form in which the embodiments of the present application may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.
Referring to fig. 1-5, the present application provides a differential pressure sensor, which includes a housing 1 having an accommodating space, a differential pressure sensing component 2 partially disposed in the accommodating space, and a pressure-inducing pipeline 3. Two opposite end parts of the pressure difference sensing part 2 are respectively connected with a pressure guiding pipeline 3, one side of the pressure guiding pipeline 3, which is far away from the pressure difference sensing part 2, is provided with a pressure guiding opening, two adjacent surfaces at one end of the pressure difference sensing part 2, which are far away from the shell 1, are respectively provided with an opening, and the pressure guiding openings are in one-to-one correspondence connection with the openings. The utility model provides a pressure differential sensor's setting has simplified the structural design of pressure differential sensor external pressure interface, and is little guaranteeing the prerequisite of pressure differential sensor measuring accuracy and use warm area, has reduced the product volume in the very big degree, selects for the pressure port that draws of higher level system simultaneously and provides more selections, and the system can select pressure differential sensor's external pressure interface according to its overall structure actual demand is nimble.
In an alternative embodiment, the differential pressure sensing part 2 includes a differential pressure chip 21 having opposite pressure ends and pressure sensing parts 22 respectively disposed at the two pressure ends, and the pressure sensing parts 22 are connected to the pressure inducing pipes 3 in a one-to-one correspondence. Wherein, the pressure end includes a high pressure end and a low pressure end, and the pressure sensing portion includes a first pressure sensing portion 221 and a second pressure sensing portion 222. In this embodiment, the low voltage end is provided with a first pressure sensing portion 221, and the high voltage end is provided with a second pressure sensing portion 222.
In an alternative embodiment, the housing 1 includes a pressure joint 11 and a pressure adapter 12 connected to each other, the pressure joint 11 is provided with a first receiving space a, the pressure adapter 12 is provided with a second receiving space, and the first receiving space and the second receiving space are respectively used for receiving the two pressure sensing parts 22 of the pressure sensing component 2. In the present embodiment, the first pressure sensing part 221 is accommodated in the first accommodating space, and the second pressure sensing part 222 is accommodated in the second accommodating space. Of course, the first pressure sensing part 221 may be accommodated in the second accommodating space, and the second pressure sensing part 222 may be accommodated in the first accommodating space. The differential pressure chip 21 is sandwiched between the pressure joint 11 and the pressure joint 12 and exposed out of the housing 1. Two adjacent surfaces of the pressure adapter 12 on the side far away from the pressure adapter 11 are provided with a first opening 121 and a second opening 122. In the embodiment of the present application, the pressure adapter 12 is cylindrical, the second opening 122 is disposed on the circular plane, and the first opening 121 is disposed on the side surface.
In an alternative embodiment, the pressure guiding pipeline 3 includes a first pressure guiding pipeline connected to the first pressure sensing part 221 and the first opening 121, and a second pressure guiding pipeline connected to the second pressure sensing part 222 and the second opening 122, the first pressure guiding pipeline includes a first pipeline 31 disposed on the pressure joint 11 and a second pipeline 32 disposed on the pressure joint 12, wherein the first pipeline 31 is L-shaped, is connected to the first pressure sensing part 221, and extends toward the pressure joint 12, and the second pipeline 32 is connected between the first pipeline 31 and the first opening 121, so that a pressure guiding port of the first pipeline 31 far from the differential pressure sensing part 2 is communicated with the first opening 121. The second conduit includes a third conduit 33 disposed on the pressure adapter 12, and the third conduit 33 is connected between the second pressure adapter 222 and the second opening 122 such that the second conduit 32 communicates with the second opening 122 away from the pressure inlet of the differential pressure sensing component 2.
In a preferred embodiment, the pressure joint 11 and the pressure adapter 12 are both provided with screw holes, and the pressure joint 11 and the pressure adapter 12 are screwed through the screw holes by nuts, so that the pressure joint is convenient to detach and the internal structure is convenient to check and replace.
In a preferred embodiment, a seal is provided between the pressure-sensitive portion 3 and the differential pressure core 21. The sealing part comprises a sealing ring which is arranged around the pressure end of the pressure difference core body 21 and is O-shaped.
In a preferred embodiment, the pressure connector 11 is further provided with a cavity B communicating with the first accommodating space a, and the cavity B communicates the first conduit 31 and the first pressure sensing part 221.
The working principle of the embodiment of the application is as follows: the differential pressure core body 21 and the second pressure sensing part 222 are hermetically connected through an O-ring to form a high-pressure end pressure cavity, and the pressure enters the second pressure guiding pipeline, i.e. the third pipeline 33, from the pressure guiding port through the second opening 122, and then reaches the high-pressure end of the differential pressure core body 21 after passing through the second pressure sensing part 222. The pressure difference core body 21, the first pressure sensing portion 221 and the cavity B are hermetically connected through an O-ring seal, so that a low-pressure end pressure cavity is formed together, pressure enters the first pressure leading pipeline from the pressure leading port through the first opening 121, namely sequentially passes through the second pipeline 32 and the first pipeline 31, and then reaches the low-pressure end of the pressure difference core body 21 after passing through the cavity B and the first pressure sensing portion 221 connected with the cavity B. The differential pressure core 21 senses the pressure difference between the high pressure end and the low pressure end thereof, and outputs a voltage signal proportional to the pressure difference for the system to collect.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A differential pressure sensor, comprising a housing having a receiving space; the pressure difference sensing part and the pressure leading pipeline are partially arranged in the accommodating space;
the two opposite end parts of the differential pressure sensing component are respectively provided with the pressure guiding pipelines, the ends of the pressure guiding pipelines, which are far away from the differential pressure sensing component, are provided with pressure guiding ports, two adjacent surfaces of one side, which is far away from the differential pressure sensing component, of the shell are respectively provided with openings, and the pressure guiding ports are in one-to-one correspondence connection with the openings.
2. The differential pressure sensor according to claim 1, wherein the differential pressure sensing part comprises a differential pressure chip having two pressure ends arranged oppositely and pressure sensing parts respectively arranged at the two pressure ends, and the pressure sensing parts are connected with the pressure leading pipelines in a one-to-one correspondence manner.
3. The differential pressure sensor according to claim 2, wherein the differential pressure sensing part further comprises a sealing portion provided between the differential pressure sensing chip and the pressure sensing portion.
4. The differential pressure sensor as recited in claim 3 wherein said sealing portion comprises a sealing ring disposed around said pressure end of said differential pressure sensing die, said sealing ring being O-shaped.
5. The differential pressure sensor of claim 2, wherein the housing includes a pressure fitting that receives one of the pressure sensing portions and a pressure adapter that receives the other of the pressure sensing portions and is connected to the pressure fitting,
the trompil is located on the pressure adapter, pressure connects last sense splenium one side is equipped with first pipeline, first pipeline is followed pressure connects to the pressure adapter extends, be equipped with in the pressure adapter and connect first pipeline and one of them the second pipeline of trompil and connect respectively and locate the pressure adapter sense splenium and another the third pipeline of trompil, first pipeline with the second pipeline constitutes one of them the pressure pipeline, the third pipeline constitutes another the pressure pipeline.
6. The differential pressure sensor of claim 5, wherein the pressure connector further comprises a cavity in communication with the first receiving space, the cavity connecting the pressure sensing portion and the first conduit.
7. The differential pressure sensor as recited in claim 5 wherein said first conduit is L-shaped.
8. The differential pressure sensor of claim 5, wherein the pressure fitting and the pressure adapter each have a threaded bore, the pressure fitting and the pressure adapter being threadably engaged by a nut through the threaded bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010459493.0A CN111649866A (en) | 2020-05-27 | 2020-05-27 | Differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010459493.0A CN111649866A (en) | 2020-05-27 | 2020-05-27 | Differential pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN111649866A true CN111649866A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010459493.0A Pending CN111649866A (en) | 2020-05-27 | 2020-05-27 | Differential pressure sensor |
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| CN (1) | CN111649866A (en) |
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 |
| CN112798172A (en) * | 2021-01-27 | 2021-05-14 | 慧石（上海）测控科技有限公司 | a multifunctional sensor |
| CN113091990A (en) * | 2021-03-18 | 2021-07-09 | 上海冉能自动化科技有限公司 | Differential pressure monitoring mechanism and differential pressure detection device using same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197316A (en) * | 1997-01-16 | 1998-07-31 | Hitachi Ltd | Density corrected liquid level detector |
| US20080016966A1 (en) * | 2005-03-05 | 2008-01-24 | Grundfos Management A/S | Differential Pressure Sensor Arrangement and Associated Differential Pressure Sensor |
| CN202814461U (en) * | 2012-06-25 | 2013-03-20 | 王士兴 | Integrated static pressure and differential pressure detection device |
| DE202017107619U1 (en) * | 2017-12-14 | 2018-01-09 | Endress + Hauser Gmbh + Co. Kg | Differenzdruckmessaufnehmer |
| CN207515954U (en) * | 2017-12-13 | 2018-06-19 | 沈阳市传感技术研究所 | Suspend absolute differential pressure pick-up entirely |
| WO2019115114A1 (en) * | 2017-12-14 | 2019-06-20 | Endress+Hauser SE+Co. KG | Differential pressure measuring sensor |
| CN212871582U (en) * | 2020-05-27 | 2021-04-02 | 慧石（上海）测控科技有限公司 | Differential pressure sensor |
-
2020
- 2020-05-27 CN CN202010459493.0A patent/CN111649866A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197316A (en) * | 1997-01-16 | 1998-07-31 | Hitachi Ltd | Density corrected liquid level detector |
| US20080016966A1 (en) * | 2005-03-05 | 2008-01-24 | Grundfos Management A/S | Differential Pressure Sensor Arrangement and Associated Differential Pressure Sensor |
| CN202814461U (en) * | 2012-06-25 | 2013-03-20 | 王士兴 | Integrated static pressure and differential pressure detection device |
| CN207515954U (en) * | 2017-12-13 | 2018-06-19 | 沈阳市传感技术研究所 | Suspend absolute differential pressure pick-up entirely |
| DE202017107619U1 (en) * | 2017-12-14 | 2018-01-09 | Endress + Hauser Gmbh + Co. Kg | Differenzdruckmessaufnehmer |
| WO2019115114A1 (en) * | 2017-12-14 | 2019-06-20 | Endress+Hauser SE+Co. KG | Differential pressure measuring sensor |
| CN212871582U (en) * | 2020-05-27 | 2021-04-02 | 慧石（上海）测控科技有限公司 | Differential pressure sensor |
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 |
| CN112798172A (en) * | 2021-01-27 | 2021-05-14 | 慧石（上海）测控科技有限公司 | a multifunctional sensor |
| CN113091990A (en) * | 2021-03-18 | 2021-07-09 | 上海冉能自动化科技有限公司 | Differential pressure monitoring mechanism and differential pressure detection device using same |
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