CN204085771U - Pressure unit - Google Patents
Pressure unit Download PDFInfo
- Publication number
- CN204085771U CN204085771U CN201420551970.6U CN201420551970U CN204085771U CN 204085771 U CN204085771 U CN 204085771U CN 201420551970 U CN201420551970 U CN 201420551970U CN 204085771 U CN204085771 U CN 204085771U
- Authority
- CN
- China
- Prior art keywords
- housing
- pressure unit
- end cap
- chipset
- circuit board
- 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 - Fee Related
Links
Abstract
Pressure unit, includes housing, and housing two ends are equipped with end cap, housing in the end cap of left side is provided with connection terminal, is provided with circuit board, is connected below circuit board with chipset in housing, chipset is located in the pipe adapter that is connected with shell, is provided with O-ring seal bottom chipset; Measurand is converted to the voltage signal of mV level by pressure unit, and is sent to the differential amplifier of the very high and temperature drift that can cancel each other of enlargement factor; Have that structure is simple, cost is low, stability is high, degree of accuracy is high, the feature of good waterproof performance.
Description
Technical field
The utility model belongs to oil recycling technical field, is specifically related to pressure unit.
Background technology
Pressure unit is the field instrument directly contacted with measured medium, usually works in the environment such as high temperature cold end corrosion vibratory impulse.Apply widely in the pressure survey and field control of the industries such as oil, chemical industry, electric power, iron and steel, light industry.But original pressure unit degree of accuracy is low, and stability is bad, can not measure thickness, crystallization, and Korrosionsmedium, and external packing is loaded down with trivial details, heavy, water proofing property is bad.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide pressure unit, has that structure is simple, cost is low, stability is high, and degree of accuracy is high, the feature of good waterproof performance.
To achieve these goals, the technical solution adopted in the utility model is: pressure unit, include housing, housing two ends are equipped with end cap, housing in the end cap of left side is provided with connection terminal, is provided with circuit board, is connected below circuit board with chipset in housing, chipset is located in the pipe adapter that is connected with shell, is provided with O-ring seal bottom chipset.
Described end cap and housing junction are provided with O-ring seal.
Described left end cap outer wall is of a size of 106mm to right end cap outer wall.
The height dimension of described shell is 65mm.
The caliber size of described pipe adapter is 30mm.
Outer six sides are provided with outside described pipe adapter.
The beneficial effects of the utility model are:
Compared with prior art, the utility model, owing to being located in housing by circuit board and chipset, is provided with O-ring seal between housing and end cap, has higher water proofing property; Non-linear little in usable range, temperature stability is good; Reliable mechanical protection IP65 and explosion-proof ExdIICT6, can be used for various rugged surroundings; Volume is little, lightweight, install, debugging, safeguard, easy to use.
The gas of reception, liquid equal pressure signal can be transformed into the current and voltage signals of standard by the utility model, carry out measuring, indicating and procedure regulation to supply the secondary instruments such as indicator alarm, registering instrument, regulator.Pressure medium directly acts on sensitive diaphragm, be distributed in the Wheatstone bridge of the resistance composition on sensitive diaphragm, utilize piezoresistive effect to achieve the conversion of amount of pressure to electric signal, by the electronic circuit on circuit board, the millivolt signal that sensitive element produces is enlarged into industry standard signal.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Specific embodiments
Below in conjunction with accompanying drawing, structural principle of the present utility model and principle of work are described in further detail.
Pressure unit, includes housing 1, and housing 1 two ends are equipped with end cap 2, housing in the end cap 2 of left side is provided with connection terminal 3, is provided with circuit board 4, is connected below circuit board 4 with chipset 5 in housing 1, chipset 5 is located in the pipe adapter 6 that is connected with shell, is provided with O-ring seal 7 bottom chipset 5
Described end cap and housing junction are provided with O-ring seal 8.
Described left end cap outer wall is of a size of 106mm to right end cap outer wall.
The height dimension of described shell is 65mm.
The caliber size of described pipe adapter 6 is 30mm.
Outer six sides are provided with outside described pipe adapter 6.
principle of work of the present utility model is:
Pressure signal, for measuring the liquid level of liquid, gas or steam, density and pressure, is then transformed into 4-20mADC signal and exports by pressure unit.For the two ends of integrated silicon pressure-sensing device, its differential pressure makes silicon chip be out of shape (displacement is very little, only μm level), to make silicon chip exports with the complete dynamically Wheatstone bridge that semiconductor technology is made the mV magnitude voltage signals being proportional to pressure under outside driven with current sources.Because the epistasis of silicon materials is splendid, thus output signal the linearity and variation index all very high.During work, measurand is converted to the voltage signal of mV level by pressure unit, and is sent to the differential amplifier of the very high and temperature drift that can cancel each other of enlargement factor.Signal after amplification is transformed into corresponding current signal through Voltage to current transducer, then through gamma correction, finally produces the normalized current voltage signal with the linear corresponding relation of input pressure.Two kinds of pressure of pressure unit measured medium pass into high and low two pressure chambers, act on the both sides isolation diaphragm of δ element (i.e. sensitive element), are sent to measuring diaphragm both sides by the filling liquid in spacer and element.Electrode on measuring diaphragm and both sides insulating trip respectively forms a capacitor.When pressure at both sides is inconsistent, cause measuring diaphragm to produce displacement, its displacement and pressure differential are directly proportional, therefore both sides electric capacity is not just etc., by vibration and demodulation link, converts the signal be directly proportional to pressure to.
Claims (6)
1. pressure unit, include housing 1, it is characterized in that, housing (1) two ends are equipped with end cap (2), housing in left side end cap (2) is provided with connection terminal (3), circuit board (4) is provided with in housing (1), circuit board (4) below is connected with chipset (5), chipset (5) is located in the pipe adapter (6) that is connected with shell, and chipset (5) bottom is provided with O-ring seal (7).
2. pressure unit according to claim 1, is characterized in that, described end cap and housing junction are provided with O-ring seal (8).
3. pressure unit according to claim 1, is characterized in that, described left end cap outer wall is of a size of 106mm to right end cap outer wall.
4. pressure unit according to claim 1, is characterized in that, the height dimension of described shell is 65mm.
5. pressure unit according to claim 1, is characterized in that, the caliber size of described pipe adapter (6) is 30mm.
6. pressure unit according to claim 1 or 5, is characterized in that, is provided with outer six sides outside described pipe adapter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551970.6U CN204085771U (en) | 2014-09-24 | 2014-09-24 | Pressure unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551970.6U CN204085771U (en) | 2014-09-24 | 2014-09-24 | Pressure unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204085771U true CN204085771U (en) | 2015-01-07 |
Family
ID=52178473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420551970.6U Expired - Fee Related CN204085771U (en) | 2014-09-24 | 2014-09-24 | Pressure unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204085771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627296A (en) * | 2017-03-20 | 2018-10-09 | 上海克凯电子科技发展有限公司 | A kind of novel no cavity pressure transmitter |
-
2014
- 2014-09-24 CN CN201420551970.6U patent/CN204085771U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627296A (en) * | 2017-03-20 | 2018-10-09 | 上海克凯电子科技发展有限公司 | A kind of novel no cavity pressure transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20150924 |
|
| EXPY | Termination of patent right or utility model |