CN208567986U - A kind of flowmeter - Google Patents
A kind of flowmeter Download PDFInfo
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- CN208567986U CN208567986U CN201821247100.4U CN201821247100U CN208567986U CN 208567986 U CN208567986 U CN 208567986U CN 201821247100 U CN201821247100 U CN 201821247100U CN 208567986 U CN208567986 U CN 208567986U
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- guiding pipe
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Abstract
The utility model belongs to flow measurement technology field, specifically disclose a kind of flowmeter, including pressure guiding pipe, three valve groups and pressure difference transmitter, the pressure guiding pipe includes positive pressure guiding pipe and negative pressure guiding pipe, the lower end of the positive pressure guiding pipe and the negative pressure guiding pipe is protruded into flow measurement pipeline, and the upper end of the positive pressure guiding pipe and the negative pressure guiding pipe is connect by three valve group with the pressure difference transmitter；Differential pressure probe is connected between the positive pressure guiding pipe and the negative pressure guiding pipe, the differential pressure probe has positive impulse mouth and negative impulse mouth, the positive impulse mouth is connected to the positive pressure guiding pipe, the negative impulse mouth is connected to the negative pressure guiding pipe, and multiple differential pressure probes are arranged along the length direction interval of the pressure guiding pipe.Flowmeter disclosed by the utility model is inserted into measuring flow in flow measurement pipeline, and measurement is convenient, and measurement accuracy is high.
Description
Technical field
The utility model relates to flow measurement technology field more particularly to a kind of flowmeters.
Background technique
Flowmeter is a kind of common measuring instrumentss for measuring gas in pipeline, steam or fluid flow, extensive
It applies in each field such as petroleum, chemical industry, water process, food and drink.With to flow measurement accuracy and area requirement get over
Come it is higher, thus derived be suitable for all kinds of flowmeters for various purposes, such as differential pressure flowmeter, balance flow meter, Electromagnetic Flow
Meter etc..
Pressure difference that differential pressure flowmeter generates when flowing through throttling set using fluid and realize flow measurement purpose, usually
It is shown by measured flux can be converted into the restricting element of pressure difference signal and this pressure difference signal can be converted to corresponding flow value
Differential manometer and the display instrument composition come.Prior art discloses a kind of inserting-type flowmeters comprising pressure guiding pipe, pressure guiding pipe
Gauge head, three valve groups, pressure difference transmitter and intelligent secondary instrument, wherein pressure guiding pipe gauge head is porous disc restricting element, porous disc
Flow is changed into pressure difference signal by restricting element, and pressure difference transmitter is converted into standard signal, for display, record or control
With.
Inserting-type flowmeter disclosed in the prior art measures the plug-in type of measurement pipeline although being able to achieve flowmeter, subtracts
Small measurement crushing.But the flow measurement for heavy caliber pipeline, since it uses single-point pressure, according to the stream of single-point pressure acquisition
Amount situation is difficult to reflect the real traffic situation of heavy caliber pipeline, especially when there is disturbance stream, non-uniform dielectric or miscellaneous in pipeline
In the case that matter disturbs, the accuracy of flow measurement is difficult to ensure.
Utility model content
The purpose of this utility model is to provide a kind of flowmeters to improve stream suitable for the measurement of heavy caliber piping flow
The precision of measurement.
To achieve the above object, the utility model adopts the following technical solutions:
A kind of flowmeter, including pressure guiding pipe, three valve groups and pressure difference transmitter, the pressure guiding pipe include that positive pressure guiding pipe draws with negative
The lower end of pressure pipe, the positive pressure guiding pipe and the negative pressure guiding pipe is protruded into flow measurement pipeline, and the positive pressure guiding pipe and described bear are drawn
The upper end of pressure pipe is connect by three valve group with the pressure difference transmitter；Between the positive pressure guiding pipe and the negative pressure guiding pipe
It is connected with differential pressure probe, the differential pressure probe has positive impulse mouth and negative impulse mouth, the positive impulse mouth and the positive pressure guiding pipe
Connection, the negative impulse mouth are connected to the negative pressure guiding pipe, and multiple differential pressure probes are between the length direction of the pressure guiding pipe
Every setting.
Further, the differential pressure probe offers cylindrical impulse chamber, the axis and the flow measurement of the impulse chamber
The flow direction of the fluid of pipeline is parallel, and the impulse is intracavitary to be provided with restricting element, the restricting element and the impulse chamber
Cavity wall it is vertical, the upstream of the restricting element is arranged in the positive impulse mouth, and one end of the positive impulse mouth is drawn with described
Chamber connection is pressed, the other end is connected to the cavity of the positive pressure guiding pipe, and the downstream of the restricting element is arranged in the negative impulse mouth,
And one end of the negative impulse mouth is connected to the impulse chamber, the other end is connected to the cavity of the negative pressure guiding pipe.
Further, the restricting element is porous disc structure, offers multiple function holes on the restricting element,
In a function hole center of the restricting element, circumferential direction of the remaining function hole along the restricting element are set
It is evenly spaced on.
Further, the number of the function hole is seven.
Further, the differential pressure probe includes the first diversion section being sequentially communicated along the flow direction, straight tube connection
Section and the second diversion section, the outer diameter of first diversion section are gradually increased along the flow direction, outside second diversion section
Diameter is gradually reduced along the flow direction, the two sides of the straight tube linkage section respectively with the positive pressure guiding pipe and the negative pressure guiding pipe
Connection.
Further, the differential pressure probe is symmetrical structure, and the symmetrical of the differential pressure probe is arranged in the restricting element
On face.
Further, the positive impulse mouth and the negative impulse mouth are arranged on the straight tube linkage section.
Further, the flowmeter further includes flange, and the flange is connect with the outer wall of the flow measurement pipeline, described to draw
Pressure pipe passes through the flange and connect with three valve group.
Further, the flanged joint has temperature measuring device, and the measuring probe of the temperature measuring device passes through institute
Flange is stated to protrude into the flow measurement pipeline.
Further, the quantity of the differential pressure probe is three.
The utility model has the beneficial effects that:
By the way that pressure guiding pipe is arranged, and differential pressure probe is arranged in flowmeter provided by the utility model on pressure guiding pipe, can incite somebody to action
Pressure guiding pipe protrudes into the measurement that flow measurement channel interior carries out flow, reduces measurement crushing；By on pressure guiding pipe along its length
Multiple differential pressure probes are set, the average positive pressure of the positive impulse mouth of the multiple differential pressure probes of the positive pressure for drawing positive pressure guiding pipe；It is negative to draw
The negative pressure that pressure pipe is drawn is the even negative pressure of the negative impulse mouth of multiple differential pressure probes, so as to reduce flow measurement pipeline flow field not
Stability or local flow-disturbing interfere the impulse that impulse is popped one's head in, and improve the accuracy of flow measurement in heavy caliber flow measurement pipeline.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flowmeter provided by the embodiment of the utility model；
Fig. 2 is the partial view of flowmeter provided by the embodiment of the utility model；
Fig. 3 is the cross-sectional view for the flowmeter that this practical new embodiment provides.
It is marked in figure as follows:
1- pressure difference transmitter；Tri- valve group of 2-；3- pressure guiding pipe；The positive pressure guiding pipe of 31-；The negative pressure guiding pipe of 32-；4- differential pressure probe；41-
First diversion section；42- straight tube linkage section；The second diversion section of 43-；44- restricting element；441- function hole；45- impulse chamber；46- is just
Impulse mouth；The negative impulse mouth of 47-；5- flange；6- temperature measuring device；61- measures main body；62- measuring probe.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is the structural schematic diagram of flowmeter provided by the utility model, as shown in Figure 1, stream provided by the utility model
Meter includes pressure guiding pipe 3, differential pressure probe 4, flange 5, three valve groups 2 and pressure difference transmitter 1.Differential pressure probe 4 is connected to pressure guiding pipe 3
On, pressure guiding pipe 3 protrudes into flow measurement channel interior, and it is poor to carry out pressure to fluid；Flange 5 is used to flowmeter being fixed on flow measurement pipeline
On；Pressure guiding pipe 3 is connect by three valve groups 2 with pressure difference transmitter 1, and three valve groups 2 are for controlling the positive and negative pressure measuring chamber of pressure difference transmitter 1
Being turned on or off between positive and negative pressure guiding pipe；Pressure difference transmitter 1 is used to for the pressure difference of positive and negative pressure guiding pipe to be changed into standard letter
Number, to measure the flow of flow measurement pipeline through pressure difference conversion.
Specifically, pressure guiding pipe 3 includes positive pressure guiding pipe 31 and negative pressure guiding pipe 32, and positive pressure guiding pipe 31 and negative pressure guiding pipe 32 are vertical
And it is arranged in parallel.The lower end of positive pressure guiding pipe 31 and negative pressure guiding pipe 32, which is protruded into flow measurement pipeline, carries out impulse to flow measurement pipeline, just
The upper end of pressure guiding pipe 31 is connect by three valve groups 2 with the positive pressure measuring chamber of pressure difference transmitter 1, for introducing just positive pressure guiding pipe 31
Pressure is transferred to pressure difference transmitter 1；The upper end of negative pressure guiding pipe 32 is connect by three valve groups 2 with the negative pressure measuring chamber of pressure difference transmitter 1, is used
Pressure difference transmitter 1 is transferred in the negative pressure for introducing negative pressure guiding pipe 32.
Positive pressure guiding pipe 31 and negative pressure guiding pipe 32 are equal in the direction flowed perpendicular to fluid and the direction for being parallel to fluid flowing
It is separated by certain interval.Differential pressure probe 4 is connected on pressure guiding pipe 3, and there are three the quantity of differential pressure probe 4, three 4 edges of differential pressure probe
The length direction uniform intervals of pressure guiding pipe 3 are arranged.
Fig. 2 is the partial schematic diagram of flowmeter provided by the embodiment of the utility model, and Fig. 3 mentions for the utility model embodiment
The cross-sectional view of the flowmeter of confession, as shown in Figure 1-3, each differential pressure probe 4 be both connected to positive pressure guiding pipe 31 and negative pressure guiding pipe 32 it
Between, direction of each differential pressure probe 4 along fluid flowing is arranged.Differential pressure probe 4 includes sequentially connected along fluid flow direction
First diversion section 41, straight tube linkage section 42 and the second diversion section 43, the outer diameter of the first diversion section 41 along fluid flow direction by
Cumulative big, the outer diameter of the second diversion section 43 is gradually reduced along fluid flow direction, and the first diversion section 41 and the second diversion section 43 are used
Water conservancy diversion is carried out in the fluid of convection current overpressure difference probe 4, flow field flow is balanced, reduces turbulent flow etc..The two sides of straight tube linkage section 42 point
Do not connect with positive pressure guiding pipe 31 and negative pressure guiding pipe 32, specifically, straight tube linkage section 42 respectively with positive pressure guiding pipe 31 and negative pressure guiding pipe
32 are welded to connect.
Differential pressure probe 4 is provided with cylindrical impulse chamber 45, and the length direction of impulse chamber 45 is identical as fluid flow direction.
Discoidal restricting element 44 is vertically installed in impulse chamber 45, i.e. 44 vertical fluid flow direction of restricting element is arranged, and is used for
It throttles to the fluid flowed through in impulse chamber 45,44 upstream and downstream of restricting element is made to generate pressure difference.
In the present embodiment, restricting element 44 is the symmetrical structure of porous disc, is provided with multiple function holes 441 above,
Flow field can be balanced, vortex vibration is reduced, greatly improves flowing field stability, enhance the stability and precision of measurement of fluid flow.
In the present embodiment, the quantity in 44 superior function hole 441 of restricting element is 7, and one of function hole 441 is located at section
The center of fluid element 44, another six function holes 441 are evenly spaced on along the circumferential direction of restricting element 44.In other embodiments,
The number of function hole 441 can also be 6,8 or more.
In the present embodiment, the diameter of each function hole 441 is all the same, is to be also possible to be located in embodiment at other
441 aperture of function hole at center is big, and 441 aperture of function hole positioned at surrounding is small.It the aperture of function hole 441 should be according to flow measurement pipeline
Caliber and the quantity of differential pressure probe 4 specifically determine.
Differential pressure probe 4 respectively corresponds in the upstream and downstream of restricting element 44 and offers positive impulse mouth 46 and negative impulse mouth
47, positive 46 one end of impulse mouth is connected to the impulse chamber 45 of 44 upstream of restricting element, and the other end is connected to the cavity of positive pressure guiding pipe 31；
Negative 47 one end of impulse mouth is connected to the impulse chamber 45 in 44 downstream of restricting element, and the other end is connected to the cavity for covering pressure guiding pipe 3.Due to
Restricting element 44 is arranged between positive impulse mouth 46 and negative impulse mouth 47, Fluid pressure and negative impulse mouth 47 at positive impulse mouth 46
The Fluid pressure at place has pressure difference, which is transferred to pressure difference transmitter 1 by positive pressure guiding pipe 31 and negative pressure guiding pipe 32, by pressure difference
After transmitter 1 is converted into current signal, the flow value of flow measurement pipeline can be obtained through Conversion Calculation.
Due to three differential pressure probes 4 along pressure guiding pipe 3 length direction be arranged, the structure of each differential pressure probe 4 and with just draw
Pressure pipe 31 is identical with the connection structure of negative pressure guiding pipe 32, and each differential pressure probe 4 all has and just draws with what positive pressure guiding pipe 31 was connected to
Pressure mouth 46 and the negative impulse mouth 47 being connected to negative pressure guiding pipe 32, so that the positive pressure that positive pressure guiding pipe 31 is drawn is three differential pressure probes
The average positive pressure of 4 positive impulse mouth 46；The negative pressure that negative pressure guiding pipe 32 is drawn is being averaged for the negative impulse mouth 47 of three differential pressure probes 4
Negative pressure is interfered the impulse of differential pressure probe 4 so as to reduce flow measurement pipeline flow field unstability or local flow-disturbing, is improved big
The accuracy of flow measurement in bore flow measurement pipeline.
To further increase the measurement accuracy to flow in flow measurement pipeline, temperature measuring device is additionally provided on flowmeter
6, temperature measuring device 6 includes measurement main body 61 and measuring probe 62, and measurement main body 61 is fixed on flange 5, measuring probe 62
Flow measurement channel interior is protruded into, the temperature in flow measurement pipeline is measured.The design of temperature measuring device 6 is conducive to eliminate because surveying
Flow measurement error caused by flow tube direction density and temperature change, improves the accuracy of flow measurement.
In the present embodiment, the quantity of differential pressure probe 4 is three, and in other embodiments, the quantity of differential pressure probe 4 can be with
It is two, or more.The quantity of differential pressure probe 4 should be specifically arranged according to the caliber of flow measurement pipeline.
In the present embodiment, flowmeter further includes intelligent secondary instrument, and intelligent secondary instrument connect with pressure difference transmitter 1, is used for
Show the measurement numerical value of pressure difference transmitter 1.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of flowmeter, including pressure guiding pipe (3), three valve groups (2) and pressure difference transmitter (1), which is characterized in that the pressure guiding pipe
It (3) include positive pressure guiding pipe (31) and negative pressure guiding pipe (32), the lower end of the positive pressure guiding pipe (31) and the negative pressure guiding pipe (32) is equal
Protrude into flow measurement pipeline, the upper end of the positive pressure guiding pipe (31) and the negative pressure guiding pipe (32) by three valve group (2) with
Pressure difference transmitter (1) connection；
It is connected with differential pressure probe (4) between the positive pressure guiding pipe (31) and the negative pressure guiding pipe (32), differential pressure probe (4) tool
There are positive impulse mouth (46) and negative impulse mouth (47), the positive impulse mouth (46) is connected to the positive pressure guiding pipe (31), and described bear is drawn
Pressure mouth (47) is connected to the negative pressure guiding pipe (32), and multiple differential pressure probes (4) are between the length direction of the pressure guiding pipe (3)
Every setting.
2. flowmeter according to claim 1, which is characterized in that offer cylindrical draw in the differential pressure probe (4)
It presses chamber (45), the axis of the impulse chamber (45) is parallel with the flow direction of fluid of the flow measurement pipeline, the impulse chamber
(45) it is provided with restricting element (44) in, the restricting element (44) is vertical with the cavity wall of the impulse chamber (45), described just to draw
Mouth (46) are pressed to be arranged in the upstream of the restricting element (44), and one end of the positive impulse mouth (46) and the impulse chamber (45)
Connection, the other end are connected to the cavity of the positive pressure guiding pipe (31), and the negative impulse mouth (47) is arranged in the restricting element
(44) downstream, and one end of the negative impulse mouth (47) is connected to the impulse chamber (45), the other end and the negative pressure guiding pipe
(32) cavity connection.
3. flowmeter according to claim 2, which is characterized in that the restricting element (44) is porous disc structure, institute
It states and offers multiple function holes (441) on restricting element (44), one of them described function hole (441) setting is in the throttling member
The center of part (44), the remaining function hole (441) are evenly spaced on along the circumferential direction of the restricting element (44).
4. flowmeter according to claim 3, which is characterized in that the number of the function hole (441) is seven.
5. flowmeter according to claim 2, which is characterized in that the differential pressure probe (4) includes along the flow direction
The first diversion section (41), straight tube linkage section (42) and the second diversion section (43) being sequentially communicated, first diversion section (41)
Outer diameter is gradually increased along the flow direction, and the outer diameter of second diversion section (43) is gradually reduced along the flow direction, institute
The two sides for stating straight tube linkage section (42) are connect with the positive pressure guiding pipe (31) and the negative pressure guiding pipe (32) respectively.
6. flowmeter according to claim 5, which is characterized in that the differential pressure probe (4) is symmetrical structure, the throttling
Element (44) is arranged on the plane of symmetry of the differential pressure probe (4).
7. flowmeter according to claim 6, which is characterized in that the positive impulse mouth (46) and the negative impulse mouth (47)
It is arranged on the straight tube linkage section (42).
8. flowmeter according to claim 1, which is characterized in that the flowmeter further includes flange (5), the flange
(5) it is connect with the outer wall of the flow measurement pipeline, the pressure guiding pipe (3) passes through the flange (5) and connect with three valve group (2).
9. flowmeter according to claim 8, the flange (5) is connected with temperature measuring device (6), the temperature measurement
The measuring probe (62) of device (6) passes through the flange (5) and protrudes into the flow measurement pipeline.
10. flowmeter according to claim 1, which is characterized in that the quantity of the differential pressure probe (4) is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821247100.4U CN208567986U (en) | 2018-08-03 | 2018-08-03 | A kind of flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821247100.4U CN208567986U (en) | 2018-08-03 | 2018-08-03 | A kind of flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208567986U true CN208567986U (en) | 2019-03-01 |
Family
ID=65449432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821247100.4U Active CN208567986U (en) | 2018-08-03 | 2018-08-03 | A kind of flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208567986U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366214A (en) * | 2020-04-24 | 2020-07-03 | 河南神马尼龙化工有限责任公司 | Device for measuring liquid level of catalyst suspension aqueous solution |
| CN112629601A (en) * | 2019-09-24 | 2021-04-09 | 中国石油化工股份有限公司 | Differential pressure type rotational flow flowmeter |
-
2018
- 2018-08-03 CN CN201821247100.4U patent/CN208567986U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629601A (en) * | 2019-09-24 | 2021-04-09 | 中国石油化工股份有限公司 | Differential pressure type rotational flow flowmeter |
| CN111366214A (en) * | 2020-04-24 | 2020-07-03 | 河南神马尼龙化工有限责任公司 | Device for measuring liquid level of catalyst suspension aqueous solution |
| CN111366214B (en) * | 2020-04-24 | 2021-06-15 | 河南神马尼龙化工有限责任公司 | Device for measuring liquid level of catalyst suspension aqueous solution |
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