CN208953036U - Venturi flow sensor - Google Patents
Venturi flow sensor Download PDFInfo
- Publication number
- CN208953036U CN208953036U CN201821627574.1U CN201821627574U CN208953036U CN 208953036 U CN208953036 U CN 208953036U CN 201821627574 U CN201821627574 U CN 201821627574U CN 208953036 U CN208953036 U CN 208953036U
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- CN
- China
- Prior art keywords
- pressure measuring
- measuring probe
- venturi tube
- flow sensor
- venturi
- 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
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Abstract
The utility model relates to flow sensor fields, disclose a kind of venturi flow sensor, including Venturi tube (1) and differential pressure measuring installation, the differential pressure measuring installation includes positive pressure measuring probe (2) and negative pressure measuring probe (3), the positive pressure measuring probe (2) is mounted in positive pressure pipe and is mounted on the entrance of the Venturi tube (1), and the negative pressure measuring probe (3) is mounted in negative pressure pipe and is mounted at the undergauge of the Venturi tube (1).Compared with prior art, the processing is simple for the utility model, compact-sized, easy for installation, and range is relatively high, carries temperature and pressure compensation function, and measurement accuracy is higher.
Description
Technical field
The utility model relates to flow sensor field, in particular to a kind of venturi flow sensor.
Background technique
Venturi flow sensor has flange, Venturi tube, pressure obtaning device, differential pressure measuring installation, temperature measurement probe group
At.Its working principle is also based on the flowing principle of continuity and Bernoulli equation as other differential-pressure instrumentations to calculate stream
Body operating condition flow.It is understood that when pressure decreases, speed will increase in same closed conduit, when the close literary mound of medium
In pipe when, pressure P+, in medium by the necking segment of Venturi tube, speed be will increase, and pressure can be reduced to P-, P+ and
P- is guided on differential pressure transmitter by the pressure tappings on Venturi meter, and when flow velocity changes, differential pressure value can increase therewith
Big or reduction.That is for stablizing fluid, the size of flow is directly proportional to differential pressure square root.When flow velocity is identical, undergauge
Section circulation area is smaller, then the differential pressure value generated is also bigger.Current venturi flow sensor have the disadvantage in that 1. because
Venturi flow sensor is made of two independent individuals of Venturi tube and differential pressure transmitter, so its manufacturing cost is higher,
Installation is extremely inconvenient；2. capacitive differential pressure transmitter precision is not high to be caused to fluctuate larger, range is narrow；3. not integrating
Temperature and pressure compensation function, it is necessary in addition install pressure probe and temp probe on pipeline, make troubles for user and cost.
Utility model content
Purpose of utility model: aiming at the problems existing in the prior art, the utility model provides a kind of venturi flow biography
Sensor, the processing is simple, compact-sized, easy for installation, and range is relatively high, carries stabilizing compensation function, and measurement accuracy is higher.
Technical solution: the utility model provides a kind of venturi flow sensor, including Venturi tube and differential pressure measurement
Device, the differential pressure measuring installation include positive pressure measuring probe and negative pressure measuring probe, and the positive pressure measuring probe is mounted on just
On pressure pipe and it is mounted on the entrance of the Venturi tube, the negative pressure measuring probe is mounted in negative pressure pipe and is mounted on
At the undergauge of the Venturi tube.
Further, the venturi flow sensor further includes temp probe, and the temp probe is mounted on described
The extension diameter section of Venturi tube.The positive pressure measuring probe for being mounted on the entrance of Venturi tube, which is also used as pressure compensation probe, to be made
With cooperation temp probe is combined into temperature and pressure compensation function, and the flow measurement of this flow sensor is made not fluctuated shadow by temperature, pressure
It rings, improves measurement accuracy.
Preferably, the temp probe is pressed abd fixed on the rear extension diameter section of the Venturi tube by the first clamp nut.
Preferably, the positive pressure measuring probe and the negative pressure measuring probe are high-precision pressure sensor.
Preferably, the positive pressure measuring probe is pressed abd fixed on the import of the Venturi tube by the second clamp nut
Place.
Preferably, the negative pressure measuring probe is pressed abd fixed on the undergauge of the Venturi tube by third clamp nut
Place.
The utility model has the advantages that fluid generates differential pressure by Venturi tube when using this flow sensor, by it is high-precision just
Pressure measuring probe and high-precision negative pressure measuring probe measure the pressure of positive pressure pipe and negative pressure pipe respectively, and by positive/negative pressure
Signal be transferred to host computer or Signal Processing Element, to get the flow for the fluid for flowing through Venturi tube；The utility model
Without using individual differential pressure transmitter, manufacturing cost is cheap, easy for installation；High-precision positive pressure measuring probe and negative pressure measurement
Probe uses so that positive/negative pressure measurement is more accurate, and measurement accuracy is higher, and range ability is bigger.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of venturi flow sensor in embodiment 1；
Fig. 2 is the structural schematic diagram of venturi flow sensor in embodiment 2.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing.
Embodiment 1:
As shown in Figure 1, the venturi flow sensor in present embodiment is mainly by Venturi tube 1 and differential pressure measuring installation
Composition, differential pressure measuring installation are made of positive pressure measuring probe 2 and negative pressure measuring probe 3, and positive pressure measuring probe 2 is compressed by second
Nut 6 is pressed abd fixed on the entrance of Venturi tube 1, and positive pressure measuring probe 2 is also mounted on positive pressure pipe (not shown)
On, negative pressure measuring probe 3 is pressed abd fixed at the undergauge of Venturi tube 1 by third clamp nut 7, and negative pressure measuring probe 3
Also it is mounted on (not shown) in negative pressure pipe；Above-mentioned positive pressure measuring probe 2 and negative pressure measuring probe 3 are high-precision pressure
Sensor.
It is by the flange 8 at both ends that this venturi flow sensor and two side ducts is close when using this flow sensor
Envelope connects, and the fluid in a side ducts enters through flange 8 from the entrance of Venturi tube 1, successively at through enturi tube 1 undergauge
Another side ducts are flowed into from another side flange 8 with after extension diameter section, in Venturi tube 1, entrance stream of the fluid from Venturi tube 1
Enter and generate pressure difference while flowing through to undergauge, is measured by high-precision positive pressure measuring probe 2 and high-precision negative pressure
Probe 3 measures the pressure of positive pressure pipe and negative pressure pipe respectively, and the signal of positive/negative pressure is transferred at host computer or signal
Component is managed, to get the flow for the fluid for flowing through Venturi tube 1.
Embodiment 2:
Present embodiment is the further improvement of embodiment 1, is mainly theed improvement is that, in the present embodiment, such as
Fig. 2 also passes through the first clamp nut 5 in the rear extension diameter section of Venturi tube 1 and compresses intrinsic temperature probe 4, at this point, being mounted on literary mound
In pipe 1 entrance positive pressure measuring probe 2 be also used as pressure compensation probe use, cooperation temp probe 4 be combined into temperature
Compensation function is pressed, makes the flow measurement of the venturi flow sensor in present embodiment not by temperature, pressure influence of fluctuations, mentions
High measurement accuracy.
In addition to this, present embodiment is identical with embodiment 1, is not repeated herein.
Above embodiment is only to illustrate the technical ideas and features of the present invention, and its object is to allow be familiar with this skill
The people of art can understand the content of the utility model and implement accordingly, not limit the protection scope of the present invention.
It is all according to the spirit of the present invention substantially equivalent transformation that is done or modification, should all cover the protection scope of the utility model it
It is interior.
Claims (5)
1. a kind of venturi flow sensor, including Venturi tube (1) and differential pressure measuring installation, it is characterised in that: the differential pressure
Measuring device includes positive pressure measuring probe (2) and negative pressure measuring probe (3), and the positive pressure measuring probe (2) is mounted on positive pressure
On pipe and it is mounted on the entrance of the Venturi tube (1), the negative pressure measuring probe (3) is mounted in negative pressure pipe and installs
At the undergauge of the Venturi tube (1)；It further include temp probe (4), the temp probe (4) is mounted on the Venturi tube
(1) rear extension diameter section.
2. venturi flow sensor according to claim 1, which is characterized in that the temp probe (4) passes through first
Clamp nut (5) is pressed abd fixed on the extension diameter section of the Venturi tube (1).
3. venturi flow sensor according to claim 1 or 2, which is characterized in that the positive pressure measuring probe (2) and
The negative pressure measuring probe (3) is high-precision pressure sensor.
4. venturi flow sensor according to claim 1 or 2, which is characterized in that the positive pressure measuring probe (2) is logical
Cross the entrance that the second clamp nut (6) is pressed abd fixed on the Venturi tube (1).
5. venturi flow sensor according to claim 1 or 2, which is characterized in that the negative pressure measuring probe (3) is logical
Third clamp nut (7) is crossed to be pressed abd fixed at the undergauge of the Venturi tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821627574.1U CN208953036U (en) | 2018-10-08 | 2018-10-08 | Venturi flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821627574.1U CN208953036U (en) | 2018-10-08 | 2018-10-08 | Venturi flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208953036U true CN208953036U (en) | 2019-06-07 |
Family
ID=66740631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821627574.1U Expired - Fee Related CN208953036U (en) | 2018-10-08 | 2018-10-08 | Venturi flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208953036U (en) |
-
2018
- 2018-10-08 CN CN201821627574.1U patent/CN208953036U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190607 Termination date: 20201008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |