CN207976185U - A kind of flow sensor that can carry out long-range zeroing correction - Google Patents
A kind of flow sensor that can carry out long-range zeroing correction Download PDFInfo
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- CN207976185U CN207976185U CN201721855246.2U CN201721855246U CN207976185U CN 207976185 U CN207976185 U CN 207976185U CN 201721855246 U CN201721855246 U CN 201721855246U CN 207976185 U CN207976185 U CN 207976185U
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- solenoid valve
- differential pressure
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- pressure pick
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Abstract
The utility model discloses a kind of flow sensors that can carry out long-range zeroing correction, including differential pressure pick-up, three-way magnetic valve and controller, the solenoid valve A interfaces are connected with the positive interfaces of differential pressure pick-up P, solenoid valve B interface bears interface with differential pressure pick-up P and tested pipeline is connected, solenoid valve C interface is connected with tested pipeline, and controller control solenoid valve switches between A interfaces and B interface unicom and A interfaces and two states of C interface unicom.It realizes the effect that flow sensor switches between " zero correction " and " measuring in real time " two states, solves the problems, such as that existing flow sensor zeroing needs manually to be manually operated to erecting bed.
Description
Technical field
The utility model is related to a kind of flow sensors, and in particular to a kind of flow sensing that can carry out long-range zeroing correction
Device.
Background technology
There are many kinds of the technological means for measuring pipeline flow, wherein being measured with measurement accuracy in the way of pressure difference
It high, the advantages that resistance of ducting is small, has a wide range of applications in coal mine gas extraction pipeline.But its crucial detection part differential pressure passes
Sensor has that null offset is serious, generally requires regular (at least monthly) and is corrected zero to ensure low side
Performance.
In order to realize zero correction, it is necessary to be in the environment of pressure difference is " 0 " and be operated in differential pressure pick-up.Existing mesh
Preceding universal mode of operation is that a set of three valve group is added, must walking number to adjust zero personnel by manual manual correction
Kilometer is operated to equipment installation point, and being generally susceptible to valve regulated logic error pressure in actual mechanical process can not
Back to zero, valve rotate the phenomenon that gas leakage not in place etc. seriously affects data correctness.
Therefore, the method there is manual maintenance heavy workload, it is more demanding to the technical merit of guardian the shortcomings of, warp
Often there is error correction due to maintenance personnel can not understand operating procedure, keep flow sensor data measured deviation more serious,
Measured value loses authenticity completely.
Utility model content
The utility model aim is to provide a kind of flow sensor that can carry out long-range zeroing correction, solves existing flow
Sensor needs manually to easy to produce asking for larger measurement error not in time to erecting bed hand reset heavy workload and zeroing
Topic.
The utility model is achieved through the following technical solutions：
A kind of flow sensor that can carry out long-range zeroing correction, includes mainly differential pressure pick-up, three-way magnetic valve and control
Device processed.Differential pressure pick-up has P just with the minus two unicom interfaces of P, and three-way magnetic valve is with tri- unicom interface tubes of A, B, C.Control
Utensil processed has control solenoid valve unicom state, operation suppressed zero algorithm and acquisition differential pressure pick-up data and is converted into measured tube
The function of road flow controls solenoid valve by controller and execution gas circuit switching is gone to replace manually adjusting, finally realizes flow
The function of the long-range suppressed zero of sensor.
The utility model compared with prior art, has the following advantages and advantages：
1, the utility model aim is to provide a kind of flow sensor that can carry out long-range zeroing correction, solves existing stream
The problem of quantity sensor zeroing needs manually to be manually operated to erecting bed.
2, the utility model aim is to provide a kind of flow sensor that can carry out long-range zeroing correction, realizes pressure
Sampling line automatic switchover, automatic zero set；
3, the utility model aim is to provide a kind of flow sensor that can carry out long-range zeroing correction, saves manpower,
Shorten the zeroing period, promotes accuracy of measurement.
Description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
FIG. 1 is a schematic structural view of the utility model.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment
As shown in Figure 1, solenoid valve A interfaces are connected with the positive interfaces of differential pressure pick-up (or transmitter) P, solenoid valve B interface with
Differential pressure pick-up (or transmitter) P bears interface and tested pipeline is connected, and solenoid valve C interface is connected with tested pipeline.
The utility model controls solenoid valve by controller, and solenoid valve A interfaces is made to join with B interface or C interface
Logical and switching.
When solenoid valve A interfaces and B interface unicom, differential pressure pick-up P forms access between just being born with P, at this time pressure positive P
Power is equal to the pressure (i.e. differential pressure equal to zero) that P is born, and realizing manual site and manually adjusting three valve groups makes the null effect of differential pressure,
Controller is only needed to run the long-range correction work that zero can be completed in corresponding correction program.
When solenoid valve A interfaces and C interface unicom, differential pressure pick-up P cannot form access between just being born with P, at this time P
Just, pressure negative P is respectively equal to the actual pressure of tested pipeline, and differential pressure pick-up anode and negative terminal are mutually isolated at this time, sensing
Device, which is in, detects real-time state of value.
Therefore, the method for controlling solenoid valve break-make by programmed algorithm and corresponding hardware circuit realizes differential pressure sensing
The automatic zero set of device, the control program is the prior art.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (2)
1. a kind of flow sensor that can carry out long-range zeroing correction, which is characterized in that including differential pressure pick-up, three-way magnetic valve
And controller, the differential pressure pick-up have P just with the minus two unicom interfaces of P, the three-way magnetic valve is with tri- connection of A, B, C
Siphunculus interface, the controller have control solenoid valve unicom state, operation suppressed zero algorithm and acquisition differential pressure pick-up number
According to and be converted into the function of tested pipeline flow.
2. a kind of flow sensor that can carry out long-range zeroing correction according to claim 1, which is characterized in that the electricity
Magnet valve A interfaces are connected with the positive interfaces of differential pressure pick-up P, and solenoid valve B interface bears interface and tested pipeline phase with differential pressure pick-up P
Even, solenoid valve C interface is connected with tested pipeline, is controlled solenoid valve by controller, makes solenoid valve A interfaces in B interface
Or switch between C interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855246.2U CN207976185U (en) | 2017-12-26 | 2017-12-26 | A kind of flow sensor that can carry out long-range zeroing correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855246.2U CN207976185U (en) | 2017-12-26 | 2017-12-26 | A kind of flow sensor that can carry out long-range zeroing correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207976185U true CN207976185U (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721855246.2U Active CN207976185U (en) | 2017-12-26 | 2017-12-26 | A kind of flow sensor that can carry out long-range zeroing correction |
Country Status (1)
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| CN (1) | CN207976185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990946A (en) * | 2017-12-26 | 2018-05-04 | 重庆光可巡科技有限公司 | Easy to the flow sensor for correction of returning to zero |
-
2017
- 2017-12-26 CN CN201721855246.2U patent/CN207976185U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990946A (en) * | 2017-12-26 | 2018-05-04 | 重庆光可巡科技有限公司 | Easy to the flow sensor for correction of returning to zero |
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