CN203310564U - Differential pressure sensor - Google Patents
Differential pressure sensor Download PDFInfo
- Publication number
- CN203310564U CN203310564U CN2013203330752U CN201320333075U CN203310564U CN 203310564 U CN203310564 U CN 203310564U CN 2013203330752 U CN2013203330752 U CN 2013203330752U CN 201320333075 U CN201320333075 U CN 201320333075U CN 203310564 U CN203310564 U CN 203310564U
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- China
- Prior art keywords
- shell
- draft tube
- upper cover
- differential pressure
- circuit board
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Abstract
The utility model discloses a differential pressure sensor which comprises a housing with matching installing holes and an upper cover with reinforcements, wherein a gas chamber is formed between the housing and the upper cover and divided into pressure chambers communicating with two air inlet pipes through a PCB circuit board. A frame groove for installing the PCB circuit board is arranged in the center of the housing, and an annular groove which is used for placing the reinforcement of the upper cover and filled with epoxy resin is arranged in the frame groove. One of the air inlet pipes is a large air inlet pipe and the other air inlet pipe is a fine air inlet pipe. Two pressure chambers are completely isolated from each other through the frame groove for installing the PCB circuit board and the groove in the frame groove, thereby ensuring measuring precision of the differential pressure sensor.
Description
Technical field
The utility model relates to sensor technical field, particularly a kind of 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, in shell, is provided with the cavity be communicated with two draft tube respectively, by the PCB circuit boards, on the PCB circuit board, is provided with position-sensing unit, be used to responding to the draught head between two cavitys between two cavitys.When differential pressure pickup uses, install by the mounting hole matching fastener be arranged on shell.Its principle of work is that gas mineralization pressure in the cavity of two relative sealings is poor, this pressure differential directly acts on the position-sensing unit of sensor, make position-sensing unit produce the micro-displacement be 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.Yet existing differential pressure pickup is because the sealing effectiveness between two cavitys is poor, and the accuracy that causes differential pressure pickup to measure can't ensure.
Summary of the invention
The technical matters that the utility model solves is to provide between a kind of two cavitys differential pressure pickup that can relative closure, to improve the measuring accuracy of differential pressure pickup.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
A kind of differential pressure pickup comprises the mutually equipped shell with mounting hole and, with the upper cover of reinforcement, forms gas cavity between shell and upper cover that gas cavity is divided into the pressure chamber be connected with two draft tube respectively by the PCB circuit board; The middle part of described shell is provided with the frame groove that the PCB circuit board is installed, and in the frame groove, is provided with the annular groove of placing the upper cover reinforcement and being full of epoxy resin; In described two draft tube, one is thick draft tube, and another root is thin draft tube.
Improvement of the present utility model is: be embedded with copper insert in the mounting hole of described shell.
Further improvement of the utility model is: all adopt the arc transition syndeton between described thick draft tube and shell and between thin draft tube and shell.
Owing to having adopted above technical scheme, the obtained technical progress of the utility model is as follows.
The utility model is by arranging the frame groove that the PCB circuit board is installed and the groove arranged on the frame groove, so that the reinforcement in the placement upper cover, in groove, be filled with epoxy resin, further to guarantee between two pressure chambers to reach the state of isolation fully, thereby effectively guaranteed the measuring accuracy of differential pressure pickup.
Draft tube is set to the draft tube of two different tube diameters, for increasing and limit the flow of gas, between draft tube and shell, adopts the arc transition syndeton, to place draft tube fracture under the effect of external force; The copper insert of setting-in in the shell mounting hole, for the process at the assembling shell, avoid shell to be subjected to external impacts and cause the generation of the damaged and phenomenon of rupture of mounting hole; Above-mentioned two improvement all can effectively improve serviceable life of the present utility model.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is cut-open view of the present utility model.
Wherein: 1, shell, 2, the PCB circuit board, 3, position-sensing unit, 4, upper cover, 5, inserts, 6, contact pin, 7, thick draft tube, 8, thin draft tube, 9, groove, 10, the frame groove, 11, breach.
Embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further elaborated.
A kind of differential pressure pickup, its structure as depicted in figs. 1 and 2, comprise mutually equipped shell 1 and, with the upper cover 4 of reinforcement, are provided with mounting hole on shell 1, in mounting hole, are embedded with copper insert 5, are provided with reinforcement on the inwall of upper cover 4; Between shell 1 and upper cover 4, form gas cavity, gas cavity is divided into two pressure chambers by PCB circuit board 2, two pressure chambers are connected with two draft tube respectively, in two draft tube, one is thick draft tube 7, another root is thin draft tube 8, all adopts the arc transition syndeton between thick draft tube and shell and between thin draft tube and shell.
The middle part of shell is provided with the frame groove 10 that the PCB circuit board is installed, and in the frame groove, is provided with annular groove 9, and annular groove 9 is be used to placing the upper cover reinforcement.On annular groove 9, be provided with breach 11, to encapsulating in groove.
The utility model assembling process is as described below.
The first step, pour into epoxy resin by breach in groove 9, then pcb board 2 is put into to the frame groove of sensor outer housing 1, and three apertures of pcb board are aimed at three contact pins, with three contact pins of flatiron welding, put into baking oven 30 minutes, and Temperature Setting is 100 ℃.
Second step, after completing above step, connect thin draft tube and source of the gas, checks whether pcb board leaks gas on every side.
The 3rd step, smear one deck epoxy resin in shell frame groove, upper cover 4 is placed in the frame groove, and the reinforcement of upper cover is put into groove, put into baking oven 30 minutes, and Temperature Setting is 100 ℃.
The 4th step, after completing above step, connect thick draft tube and source of the gas, checks whether upper cover leaks gas on every side.
Finally, take out the subassembly assembled, two draft tube of subassembly are connected with two blow vents on shell respectively, connector and plug are to inserting, and start-up routine is inputted chip by data and got final product.
Claims (3)
1. differential pressure pickup, comprise the mutually equipped shell with mounting hole (1) and with the upper cover (4) of reinforcement, between shell (1) and upper cover (4), form gas cavity, gas cavity is divided into the pressure chamber be connected with two draft tube respectively by PCB circuit board (2); It is characterized in that: the middle part of described shell is provided with the frame groove (10) that the PCB circuit board is installed, and in the frame groove, is provided with the annular groove (9) of placing the upper cover reinforcement and being full of epoxy resin; In described two draft tube, one is thick draft tube (7), and another root is thin draft tube (8).
2. a kind of differential pressure pickup according to claim 1, is characterized in that: in the mounting hole of described shell, be embedded with copper insert (5).
3. a kind of differential pressure pickup according to claim 1, is characterized in that: all adopt the arc transition syndeton between described thick draft tube and shell and between thin draft tube and shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203330752U CN203310564U (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203330752U CN203310564U (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203310564U true CN203310564U (en) | 2013-11-27 |
Family
ID=49616766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203330752U Expired - Lifetime CN203310564U (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203310564U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278285A (en) * | 2013-06-08 | 2013-09-04 | 无锡隆盛科技股份有限公司 | Differential pressure sensor |
| CN107991016A (en) * | 2017-12-15 | 2018-05-04 | 芜湖致通汽车电子有限公司 | A kind of differential pressure pick-up structure |
| CN108918020A (en) * | 2018-10-08 | 2018-11-30 | 无锡隆盛科技股份有限公司 | A kind of differential pressure pickup of detectable bidirectional pressure difference |
-
2013
- 2013-06-08 CN CN2013203330752U patent/CN203310564U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278285A (en) * | 2013-06-08 | 2013-09-04 | 无锡隆盛科技股份有限公司 | Differential pressure sensor |
| CN107991016A (en) * | 2017-12-15 | 2018-05-04 | 芜湖致通汽车电子有限公司 | A kind of differential pressure pick-up structure |
| CN108918020A (en) * | 2018-10-08 | 2018-11-30 | 无锡隆盛科技股份有限公司 | A kind of differential pressure pickup of detectable bidirectional pressure difference |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |