CN203981339U - A kind of differential pressure pickup shell - Google Patents
A kind of differential pressure pickup shell Download PDFInfo
- Publication number
- CN203981339U CN203981339U CN201420404174.XU CN201420404174U CN203981339U CN 203981339 U CN203981339 U CN 203981339U CN 201420404174 U CN201420404174 U CN 201420404174U CN 203981339 U CN203981339 U CN 203981339U
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- CN
- China
- Prior art keywords
- draft tube
- shell
- sensor
- angles
- differential pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 208000002925 dental caries Diseases 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a kind of differential pressure pickup shell, comprise the shell with mounting-positioning holes, in shell, be provided with the cavity being communicated with two draft tube respectively, between two cavitys, pass through PCB circuit boards, on PCB circuit board, be provided with position-sensing unit, there is air hole centre; Two described draft tube are set to tilt laterally, and become each other 20 ° of angles.Two draft tube of the utility model are set to tilt laterally, and become each other the mode of 20 ° of angles, can reduce two distances between draft tube root on the one hand, thereby shorten the total length of sensor; On the other hand, because every draft tube becomes 10 ° of angles with the vertical line of sensor outer housing end face, so obviously increase during more vertical setting of contact area of draft tube root and sensor, so the bending strength of draft tube also obviously strengthens.
Description
Technical field
The utility model relates to sensor technical field, particularly a kind of shell of the sensor for measurement gas pressure.
Background technology
Differential pressure pickup is a kind of sensor that is used for measuring difference between two pressure, is generally used for measuring the pressure reduction of a certain equipment or parts rear and front end.Differential pressure pickup comprises shell, is provided with the cavity being communicated with two draft tube respectively in shell, between two cavitys, by PCB circuit boards, on PCB circuit board, is provided with position-sensing unit, and there is air hole centre, for responding to the draught head between two cavitys.The displacement that position-sensing unit produces is directly proportional to air pressure, thereby the resistance value in sensor circuit is changed, electronic circuit detects this change in voltage, and the canonical measure signal of a corresponding pressure of conversion output is transferred in ECU, ECU compare analyzing, processing and output.
Two draft tube of current differential pressure pickup are to be parallel to each other and perpendicular to sensor surface mostly, plug tracheae in order to install convenient, distance between two snorkels is often larger, therefore the length of sensor is longer, the diameter of two other draft tube is less, just less with the connection area of sensor, when bearing larger moment of flexure,, aspect reliability, there is hidden danger in two often easily fractures of draft tube.
Summary of the invention
The purpose of this utility model is in order to increase the strength of joint of two draft tube and sensor, makes it be not easy fracture, and shortens the length dimension of sensor, is convenient to sensor in the installation of engine interior.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows:
A differential pressure pickup, comprises the shell with mounting-positioning holes, is provided with the cavity being communicated with two draft tube respectively in shell, between two cavitys, by PCB circuit boards, on PCB circuit board, is provided with position-sensing unit, and there is air hole centre; Two draft tube are set to respectively tilt laterally, and become each other 20 ° of angles.
Beneficial effect: two draft tube of the utility model are set to tilt laterally, and become each other the mode of 20 ° of angles, can reduce two distances between draft tube root on the one hand, thereby shortens the total length of sensor; On the other hand, because every draft tube becomes 10 ° of angles with the vertical line of sensor outer housing end face, so obviously increase during more vertical setting of contact area of draft tube root and sensor, so the bending strength of draft tube also obviously strengthens.
Accompanying drawing explanation
Fig. 1 is the differential pressure pickup structural representation before improving;
Fig. 2 is the structural representation of the differential pressure pickup after improving;
Fig. 3 is the upward view of Fig. 2, and cuts open along mounting-positioning holes 1.
In figure: 1-mounting-positioning holes, 2-cavity, 3-draft tube, 4-shell, 5-position-sensing unit, 6-PCB circuit board, 7-air hole.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Be illustrated in figure 1 the differential pressure pickup structural representation of the shell 4 before improvement, and in conjunction with shown in Fig. 3, a kind of differential pressure pickup, comprise the shell 4 with mounting-positioning holes 1, in shell 4, be provided with between cavity 2, two cavitys 2 that are communicated with two draft tube 3 respectively and isolate by PCB circuit board 6, on PCB circuit board 6, be provided with position-sensing unit 5, it is to be parallel to each other and perpendicular to sensor surface that there are 7, two draft tube 3 of air hole centre.Fig. 2 is the differential pressure pickup of the shell 4 after improving, and two draft tube 3 is changed to two draft tube 3 by be arrangeding in parallel before improving and tilt laterally respectively, and become each other 20 ° of angles.
Because of the differential pressure pickup before improving, two draft tube 3 are to be parallel to each other and perpendicular to sensor surface, plug tracheae in order to install convenient, distance between two snorkels is often larger, so the length of sensor is longer, and the diameter of two other draft tube is less, just less with the connection area of sensor, when bearing larger moment of flexure,, there is hidden danger in two often easily fractures of draft tube aspect reliability.Shell 4 after improvement, two draft tube are set to tilt laterally, and become each other the mode of 20 ° of angles, can reduce two distances between draft tube root on the one hand, thereby shorten the total length of sensor, be convenient to sensor in the installation of engine interior; On the other hand, because every draft tube becomes 10 ° of angles with the vertical line of sensor outer housing end face, so obviously increase during more vertical setting of contact area of draft tube root and sensor, so the bending strength of draft tube also obviously strengthens.
Claims (1)
1. a differential pressure pickup shell, the shell (4) that comprises band mounting-positioning holes (1), in shell (4), be provided with the cavity (2) being communicated with two draft tube (3) respectively, between two cavitys (2), by PCB circuit board (6), isolate, on PCB circuit board (6), be provided with position-sensing unit (5), there is air hole (7) centre; It is characterized in that: described two draft tube (3) are set to respectively tilt laterally, and become each other 20 ° of angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404174.XU CN203981339U (en) | 2014-07-21 | 2014-07-21 | A kind of differential pressure pickup shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404174.XU CN203981339U (en) | 2014-07-21 | 2014-07-21 | A kind of differential pressure pickup shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203981339U true CN203981339U (en) | 2014-12-03 |
Family
ID=51978769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420404174.XU Expired - Lifetime CN203981339U (en) | 2014-07-21 | 2014-07-21 | A kind of differential pressure pickup shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203981339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101460A (en) * | 2014-07-21 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Housing of pressure difference sensor |
| CN104775873A (en) * | 2015-03-20 | 2015-07-15 | 凯龙高科技股份有限公司 | Encapsulation protection structure of pressure difference sensor chip |
-
2014
- 2014-07-21 CN CN201420404174.XU patent/CN203981339U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101460A (en) * | 2014-07-21 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Housing of pressure difference sensor |
| CN104775873A (en) * | 2015-03-20 | 2015-07-15 | 凯龙高科技股份有限公司 | Encapsulation protection structure of pressure difference sensor chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |
|
| CX01 | Expiry of patent term |