CN207610734U - Flow measurement device with choke preventing function and system - Google Patents
Flow measurement device with choke preventing function and system Download PDFInfo
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- CN207610734U CN207610734U CN201721793636.1U CN201721793636U CN207610734U CN 207610734 U CN207610734 U CN 207610734U CN 201721793636 U CN201721793636 U CN 201721793636U CN 207610734 U CN207610734 U CN 207610734U
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Abstract
A kind of flow measurement device and system with choke preventing function, flow measurement device include：Pressure guide plate；Rectification dust cover, rectification dust cover are set to the side of pressure guide plate, and rectification dust cover surrounds the cavity to be formed and be connected with the outside of rectification dust cover with pressure guide plate；One end of high pressure pressure guiding pipe, high pressure pressure guiding pipe is set in cavity；Low pressure pressure guiding pipe, one end of low pressure pressure guiding pipe are set to the side opposite with the dust cover of the plate.The flow measurement device can accurately measure flow, and have the effect of anti-blocking.
Description
Technical field
The utility model is related to fluid measurement technical field, more particularly to a kind of flow measurement device with choke preventing function
And system.
Background technology
Currently, dirty gas flow measurement is increasingly important.The either blast furnace of smelter, converter, coke-stove gas, still
One secondary air flow of flue gas and boiler of thermal power plant discharge, black furnace plume amount, powder ventilation quantity processed are required for carrying out accurate
Flow measurement.Above-mentioned tested gas medium often have circulation caliber is big, pipeline flow development length is limited, medium temperature is high,
The features such as flow velocity is low, dust content is big, regular flow measuring device are difficult to adapt to these features.
For example, orifice plate needs longer front and back straight pipe and the measured deviation easily caused by abrasion；Venturi tube, airfoil type wind
Differential pressure is less than normal caused by amount device, and especially when flow velocity is low, signal-to-noise ratio is not big enough；Thermal flowmeter low-response, in quilt
The occasion that gas component changes greatly is measured, because gas specific heat at constant pressure holds Cp values and thermal conductivity variation, measured value has larger change
Change and generates error；Various bars of class flowmeters are particularly easy to block, and the differential pressure generated is also less than normal.The skin support largely used at present
There is also easily stifled, the unintelligible unstable disadvantages of differential pressure signal for pipe and the flowmeter made of its improvement.Chinese patent
CN107192846A、CN202512135U、CN201555612U、CN203848867U、CN204142296U、CN10601780A、
The principle of differential pressure type Pitot tube is utilized in CN204740262U, and using the pressure pipe that bore is larger, and setting can be wherein
The dust-removing rod to freely swing in certain amplitude, to solve the problems, such as dust accretions, fouling.However since overall structure is not excellent
Change, flow separation is not effectively controlled, and dust is still easy accumulation fouling, while also differential pressure signal can be caused unstable
Problem.
Therefore, expect research and development it is a kind of be not easy to plug, be wear-resistant, the fluid measurement instrument that differential pressure signal is steady and audible.
Utility model content
The utility model proposes a kind of flow measurement device and system with choke preventing function, can overcome existing stream
Measuring device differential pressure signal is unstable, is easy the defect of accumulation fouling.
On the one hand the utility model proposes a kind of flow measurement device with choke preventing function, including：
Pressure guide plate；
Rectification dust cover, the rectification dust cover are set to the side of the pressure guide plate, the rectification dust cover with it is described
Pressure guide plate surrounds the cavity to be formed and be connected with the outside of the rectification dust cover；
One end of high pressure pressure guiding pipe, the high pressure pressure guiding pipe is set in the cavity；
One end of low pressure pressure guiding pipe, the low pressure pressure guiding pipe is set to the opposite with the rectification dust cover of the pressure guide plate
Side.
Preferably, the rectification dust cover is coaxially disposed with the pressure guide plate.
Preferably, along the direction vertical with the axis of rectification dust cover, the outer rim of the rectification dust cover is located at
The inside of the outer rim of the pressure guide plate.
Preferably, the rectification dust cover is taper or streamlined.
Preferably, the rectification dust cover is parabola shaped along the section of its axial direction.
Preferably, the pressure guide plate is rectangle.
Preferably, the pressure guide plate is spherical calotte, and the rectification dust cover is set to the concave side of the spherical surface.
Preferably, the other end of the high pressure pressure guiding pipe pass through the pressure guide plate, and with the high pressure port of differential pressure pick-up
It is connected, the other end of the low pressure pressure guiding pipe is connected with the low-pressure port of differential pressure pick-up.
Preferably, described one end of the high pressure pressure guiding pipe is wedge shape, when the flow measurement device is installed on measured tube
When in road, Open Side Down for described one end.
Preferably, described one end of the high pressure pressure guiding pipe is L-shaped, when the flow measurement device is installed on tested pipeline
When interior, Open Side Down for described one end.
Preferably, the low pressure pressure guiding pipe is set between the pressure guide plate and the high pressure pressure guiding pipe.
Preferably, described one end of the low pressure pressure guiding pipe is wedge shape, and is open towards the high pressure pressure guiding pipe.
Preferably, the rectification dust cover is equipped with through-hole or straight slot close to one end of the pressure guide plate, and the cavity passes through
The through-hole or straight slot are connected with the outside of the rectification dust cover.
Preferably, the rectification dust cover is set to the side of the pressure guide plate by least one supporting rod, described whole
Gap is formed between the edge and the pressure guide plate of stream dust cover, the cavity passes through the gap and the rectification dust cover
Outside is connected.
Preferably, the high pressure pressure guiding pipe and low pressure pressure guiding pipe are multiple, and multiple high pressure pressure guiding pipes are arranged in parallel and phase
Intercommunicated, multiple low pressure pressure guiding pipes are arranged in parallel and are interconnected.
On the other hand the utility model provides a kind of Flow Measuring System with choke preventing function, including multiple tools
There are the flow measurement device of choke preventing function, the high pressure pressure guiding pipe of each flow measurement device to communicate with each other, low pressure pressure guiding pipe is also each other
Connection.
The beneficial effects of the utility model are：
1. surrounding the cavity to be formed and be connected with the outside of rectification dust cover with pressure guide plate by rectification dust cover, high pressure is drawn
One end of pressure pipe is set in the cavity, can effectively be obtained stable high-voltage signal and dust impurity etc. and be blocked high pressure
The tracting pressuring hole of pressure guiding pipe, low pressure pressure guiding pipe are set to the lee side of pressure guide plate, stable low-voltage signal can be effectively obtained, to reach
Flow and anti-blocking effect are measured to accurate.
2. taper or slender contour can be used in rectification dust cover, to the drag minimization of fluid, to farthest
Permanent compression loss is reduced, the impact capacity for being resistant to fluids within pipes is stronger, more durable.
3. along the direction vertical with the axis of rectification dust cover, the outer rim of rectification dust cover is located at the outer rim of pressure guide plate
Inside, the measurement body being made up of in this way rectification dust cover and pressure guide plate ensure the media flow in tested pipeline always can
The place for generating minimum static pressure detaches, and ensure that the output of stable, high s/n ratio differential pressure signal.
4. high pressure pressure guiding pipe is opening down, the opening of low pressure pressure guiding pipe further prevents dust dirt towards lee side
Accumulation obstruction.
5. when the caliber of tested pipeline is larger, multiple flow measurement devices can be used in combination, and installs, is easy to maintain.
6. the flow measurement device and the measuring precision are high, measurement range is big, discharge coefficient is stablized, and processing technology letter
It is single.
The device of the utility model has other characteristics and advantages, these characteristics and advantages are from the attached drawing being incorporated herein
It will be apparent in subsequent specific implementation mode, or will be in the attached drawing and subsequent specific implementation being incorporated herein
It is stated in detail in mode, these the drawings and specific embodiments are used together to explain the specific principle of the utility model.
Description of the drawings
The utility model exemplary embodiment is described in more detail in conjunction with the accompanying drawings, the utility model it is above-mentioned
And other purposes, feature and advantage will be apparent, wherein identical in the utility model exemplary embodiment
Reference numeral typically represents same parts.
Fig. 1 shows the flow measurement device with choke preventing function of the first exemplary embodiment according to the present utility model
Structural schematic diagram；
Fig. 2 shows the flow measurement device work with choke preventing function of the first exemplary embodiment according to the present utility model
Fluid state figure when making；
Fig. 3 a, Fig. 3 b and Fig. 3 c show second, third and the 4th exemplary embodiment according to the present utility model respectively
The stereogram of the rectification dust cover of flow measurement device with choke preventing function；
Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d and Fig. 4 e show the 5th to the 9th exemplary implementation according to the present utility model respectively
The stereogram of the pressure guide plate of the flow measurement device with choke preventing function of example；
Fig. 5 shows the flow measurement device with choke preventing function of the tenth exemplary embodiment according to the present utility model
Partial schematic diagram；
Fig. 6 and Fig. 7 shows the stream with choke preventing function of the 11st exemplary embodiment according to the present utility model respectively
The structural schematic diagram and scheme of installation of measuring device；
Fig. 8 and Fig. 9 shows that having for the 12nd and the 13rd exemplary embodiment according to the present utility model is anti-blocking respectively
The schematic diagram of the Flow Measuring System of function.
Reference sign：
1- rectification dust covers, 2- pressure guide plates, 3- high pressure pressure guiding pipes, 4- low pressure pressure guiding pipes, 5- supporting rods, 6- tested pipelines,
7- differential pressure transmitters.
Specific implementation mode
The utility model is more fully described below with reference to accompanying drawings.Although showing the preferred of the utility model in attached drawing
Embodiment, however, it is to be appreciated that may be realized in various forms the utility model without should be limited by embodiments set forth here
System.On the contrary, these embodiments are provided so that the utility model is more thorough and complete, and can be by the utility model
Range is completely communicated to those skilled in the art.
Include according to the flow measurement device with choke preventing function of the utility model exemplary embodiment：
Pressure guide plate；
Rectification dust cover, rectification dust cover are set to the side of pressure guide plate, rectification dust cover surrounded with pressure guide plate to be formed with
The cavity that the outside of rectification dust cover is connected；
One end of high pressure pressure guiding pipe, high pressure pressure guiding pipe is set in cavity；
Low pressure pressure guiding pipe, one end of low pressure pressure guiding pipe are set to the side opposite with rectification dust cover of pressure guide plate.
In use, flow measurement device is installed in tested pipeline, and rectification dust cover is installed on the upstream of pressure guide plate,
That is the direction of flow of rectification dust cover face fluid, pressure guide plate are located at the rear of rectification dust cover.When measured medium is in measured tube
When being flowed in road, rectification dust cover can be entered and surround the cavity to be formed with pressure guide plate, be metastable pressure pcl in the cavity
Ji Qu, and pressure is higher, high pressure pressure guiding pipe obtains the pressure of high pressure accumulation regions；Measured medium can flow after flowing through pressure guide plate
Dynamic separation, pressure reduce to form the relatively low build-up of pressure area of a pressure suddenly, and it is poly- that low pressure pressure guiding pipe obtains low pressure
The pressure of Ji Qu.Pass through the two pressure, you can calculate corresponding flow value.
Pass through rectification dust cover and pilot according to the flow measurement device with choke preventing function of the utility model embodiment
Plate surrounds the cavity to be formed and be connected with the outside of rectification dust cover, and one end of high pressure pressure guiding pipe is set in the cavity, Ji Nengyou
Effect obtains stable high-voltage signal, and is avoided that dust impurity etc. and blocks the tracting pressuring hole of high pressure pressure guiding pipe, and low pressure pressure guiding pipe is set to
The lee side of pressure guide plate can effectively obtain stable low-voltage signal, to achieve the effect that accurately to measure flow and anti-blocking.
In one example, rectification dust cover is coaxially disposed with pressure guide plate, is conducive to obtain stable high-voltage signal.
In one example, along the direction vertical with the axis of rectification dust cover, the outer rim of rectification dust cover, which is located at, to be led
The inside of the outer rim of pressing plate, the i.e. outer rim of rectification dust cover surround the area to be formed and surround the face to be formed less than the outer rim of pressure guide plate
Product, this is conducive to form metastable high pressure accumulation regions in the cavity, it is ensured that media flow in tested pipeline is always can
The place for generating minimum static pressure detaches, and ensure that the output of stable, high s/n ratio differential pressure signal.
In one example, rectification dust cover be taper or streamlined, for example, rectification dust cover can be cone,
Pyramid or curved cone, rectification dust cover may be bullet-shaped.Preferably, rectification dust cover cuing open along its axial direction
Face is parabola shaped, and in other words, axis of the rectification dust cover by one section of parabola around rectification dust cover rotates.It is above-mentioned
The shape of rectification dust cover can ensure drag minimization of the rectification dust cover to fluid, permanent to farthest reduce
The pressure loss, the impact capacity for being resistant to fluids within pipes is stronger, more durable.
In one example, pressure guide plate is spherical calotte, and rectification dust cover is set to the concave side of spherical surface.Change speech
It, the concave surface of spherical surface is fluoran stream surface, and convex surface is lee side.Be conducive to form metastable high pressure aggregation in the cavity in this way
Area.
In one example, when the cross section of tested pipeline is rectangle, pressure guide plate can be rectangle, and four angles of rectangle
It can be fillet, or carry out chamfered, to reduce the resistance to fluid.
In one example, the other end of high pressure pressure guiding pipe pass through pressure guide plate, and with the high pressure port phase of differential pressure pick-up
Connection, the other end of low pressure pressure guiding pipe are connected with the low-pressure port of differential pressure pick-up.Differential pressure pick-up receives high pressure pressure guiding pipe
With the pressure signal of low pressure pressure guiding pipe acquisition, differential pressure value Δ P between the two is determined, to calculate measured tube according to formula (1)
The flow of measured medium in road：
Wherein：
qvFor flow；
α is discharge coefficient, is obtained by calibration experiments data；
ε is com-pressible factor, when fluid is incompressible state, ε=1；When fluid is compressed state, pass through school
Quasi-experiment data obtain the value of ε；
S is the conduit cross-sectional area of measurement point；
Δ P is differential pressure value；
ρ is fluid density.
In one example, the one end of high pressure pressure guiding pipe being set in cavity is wedge shape, when flow measurement device is installed on
When in tested pipeline, Open Side Down for described one end, to further increase dust-proof anti-blocking ability.Preferably, high pressure pressure guiding pipe is L
Type, in order to connect sensor.
In one example, high pressure pressure guiding pipe be set to cavity in one end be L-shaped, when flow measurement device be installed on by
When in test tube road, Open Side Down for described one end, to further prevent dust dirt accumulation to block.
In one example, low pressure pressure guiding pipe is set between pressure guide plate and high pressure pressure guiding pipe.Preferably, low pressure pressure guiding pipe
Described one end (i.e. be set to pressure guide plate the side opposite with rectification dust cover one end) be wedge shape, and opening draw towards high pressure
Pressure pipe installs after-opening back to direction of flow, so as to prevent dust from blocking tracting pressuring hole.
In one example, rectification dust cover is equipped with through-hole or straight slot close to one end of pressure guide plate, cavity by through-hole or
Straight slot is connected with the outside of rectification dust cover.In another example, rectification dust cover is arranged by least one supporting rod
In the side of pressure guide plate, gap is formed between the edge and pressure guide plate of rectification dust cover, cavity passes through gap and rectification dust cover
Outside be connected.Both modes can form the cavity being connected with the outside of rectification dust cover.
In one example, when the caliber of tested pipeline is larger, rectification dust cover and deflector can be longer, set simultaneously
Multiple high pressure pressure guiding pipes and low pressure pressure guiding pipe are set, multiple high pressure pressure guiding pipes are arranged in parallel and are interconnected, multiple low pressure pressure guiding pipes
It is arranged in parallel and is interconnected, the high pressure pressure guiding pipe and low pressure pressure guiding pipe of multiple connections are connected respectively to external sense after collecting
Device.According to actual working conditions, rectification dust cover and deflector can be arranged into array according to certain rules.
The utility model embodiment also provides a kind of Flow Measuring System with choke preventing function, including multiple tools
There is the flow measurement device of choke preventing function, the high pressure pressure guiding pipe of each flow measurement device communicates with each other, and low pressure pressure guiding pipe is also each other
Connection, it is suitable for the situations that the caliber of tested pipeline is larger.
In one example, multiple flow measurement devices are arranged in the form of rectangular array, and the height of each flow measurement device
Pressure pressure guiding pipe communicates with each other, and low pressure pressure guiding pipe also communicates with each other, after the high pressure pressure guiding pipe and low pressure pressure guiding pipe of multiple connections collect
It is connected respectively to the high pressure port and low-pressure port of differential pressure transmitter.
In one example, multiple flow measurement devices are arranged with axial symmery shape, and the high pressure of each flow measurement device
Pressure guiding pipe communicates with each other, and low pressure pressure guiding pipe also communicates with each other, the high pressure pressure guiding pipe and low pressure pressure guiding pipe of multiple connections collect after point
It is not connected to the high pressure port and low-pressure port of differential pressure transmitter.
Embodiment one
Fig. 1 shows the flow measurement device with choke preventing function of the first exemplary embodiment according to the present utility model
Structural schematic diagram, Fig. 2 show the flow measurement dress with choke preventing function of the first exemplary embodiment according to the present utility model
Set fluid state figure when work.
As illustrated in fig. 1 and 2, the flow measurement device with choke preventing function includes：
Pressure guide plate 2；
Rectification dust cover 1, rectification dust cover 1 are set to the side of pressure guide plate 2, and rectification dust cover 1 surrounds shape with pressure guide plate 2
At the cavity being connected with the outside of rectification dust cover 1；
One end of high pressure pressure guiding pipe 3, high pressure pressure guiding pipe 3 is set in cavity；
Low pressure pressure guiding pipe 4, one end of low pressure pressure guiding pipe 4 are set to the side opposite with rectification dust cover of pressure guide plate.
Wherein, rectification dust cover 1 is bullet-shaped, and pressure guide plate 2 is spherical calotte, and rectification dust cover 1 and pressure guide plate 2 are coaxially set
It sets, and rectification dust cover 1 is fixed on by multiple supporting rods 5 on the concave surface of pressure guide plate 2.Between rectification dust cover 1 and pressure guide plate 2
Gap is formed, cavity can be connected to by the gap with the external of rectification dust cover 1.
High pressure pressure guiding pipe 3 is L-type, and one end is set in cavity, and the other end passes through pressure guide plate 2 and is connected to differential pressure transmitter
7 high pressure port.The one end of high pressure pressure guiding pipe 3 being set in cavity is wedge shape, and Open Side Down.Low pressure pressure guiding pipe 4 is straight line
Type is set between pressure guide plate 2 and high pressure pressure guiding pipe 3.The pressure end of low pressure pressure guiding pipe 4 is set to the dust-proof with rectification of pressure guide plate
Opposite side is covered, and the end is wedge shape, is open towards high pressure pressure guiding pipe 3, the other end is connected to the low-pressure end of differential pressure transmitter 7
Mouthful.
In use, flow measurement device is installed in tested pipeline 6, and rectification dust cover 1 is installed on the upper of pressure guide plate 2
Trip, at this point, the concave surface of pressure guide plate 2 is towards fluoran stream surface, convex surface facing lee side.When measured medium flowing in tested pipeline 6,
Rectification dust cover and pressure guide plate can be entered and surround the cavity to be formed, be metastable build-up of pressure area in the cavity, and pressure
Higher, high pressure pressure guiding pipe 3 obtains the pressure of high pressure accumulation regions；Flow separation can occur after flowing through pressure guide plate for measured medium, pressure
Power reduces to form the relatively low build-up of pressure area of a pressure suddenly, and low pressure pressure guiding pipe 4 obtains the pressure of low pressure accumulation regions
Power.Fig. 2 shows fluid state figure when flow measurement device work, and arrow indicates the flow direction of fluid in figure.Such as Fig. 2 institutes
Show, in the leading edge of pressure guide plate, flow blockage can lead to build-up of pressure in conduction to rectification dust cover, form high pressure accumulation regions；
Flowing detaches after pressure guide plate, pressure reduction, forms low pressure accumulation regions.Differential pressure transmitter 7 acquires high pressure accumulation regions and low pressure
The pressure signal of accumulation regions, determines differential pressure value.Then, you can corresponding flow is calculated by formula (1) according to differential pressure value.
Embodiment two to four
The flow measurement dress with choke preventing function of second, third and the 4th exemplary embodiment according to the present utility model
Set that difference lies in the shape of rectification dust cover is different from the first exemplary embodiment.Fig. 3 a, Fig. 3 b and Fig. 3 c show root respectively
It is anti-with the rectification of the flow measurement device with choke preventing function of the 4th exemplary embodiment according to second, third of the utility model
The stereogram of dust hood.As shown in Fig. 3 a, Fig. 3 b and Fig. 3 c, rectification dust cover can be cone, pyramid or curved cone,
These shapes are all conducive to the resistance for reducing rectification dust cover to fluid.
Embodiment five to nine
The flow measurement device with choke preventing function of 5th to the 9th exemplary embodiment according to the present utility model with
Difference lies in the shape of pressure guide plate differences for first exemplary embodiment.Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d and Fig. 4 e are shown respectively
The pressure guide plate of the flow measurement device with choke preventing function of 5th to the 9th exemplary embodiment according to the present utility model
Stereogram.In Fig. 4 a illustrated embodiments, pressure guide plate is curved surface；In Fig. 4 b illustrated embodiments, pressure guide plate is disk；In Fig. 4 c
In illustrated embodiment, pressure guide plate is square hypocrateriform；In Fig. 4 d illustrated embodiments, the top half of pressure guide plate is curved surface,
Lower half portion is rectangle；In Fig. 4 e illustrated embodiments, pressure guide plate is round rectangle.It is straight shown in Fig. 4 b, Fig. 4 d and Fig. 4 e
Pressure guide plate be conducive to dust under certain operating modes and be scattered, be not easy to accumulate.Outer profile shown in Fig. 4 c, Fig. 4 d and Fig. 4 e is rectangle
Pressure guide plate be suitable for tested pipeline cross section be rectangle the case where, in this case, the outer profile of pressure guide plate can pass through
By the cross section of tested pipeline in all directions scaled down and obtain, it is preferable that each vertex of pressure guide plate do fillet or
Person's chamfered.
Embodiment ten
Fig. 5 shows the flow measurement device with choke preventing function of the tenth exemplary embodiment according to the present utility model
Partial schematic diagram.The flow measurement device and first with choke preventing function of tenth exemplary embodiment according to the present utility model
Difference lies in the shape of one end of high pressure pressure guiding pipe differences for exemplary embodiment.As shown in figure 5, high pressure pressure guiding pipe is set to chamber
Internal one end is L-shaped, and when flow measurement device is installed in tested pipeline, Open Side Down for described one end, with further
Prevent dust dirt accumulation from blocking.
Embodiment 11
Fig. 6 and Fig. 7 shows the stream with choke preventing function of the 11st exemplary embodiment according to the present utility model respectively
The structural schematic diagram and scheme of installation of measuring device.As shown in Figure 6 and Figure 7, rectification dust cover 1 and deflector 2 are 4
It is a, form linear array, while multiple high pressure pressure guiding pipes 3 and low pressure pressure guiding pipe 4 are set, multiple high pressure pressure guiding pipes 3 are arranged in parallel
And be interconnected, multiple low pressure pressure guiding pipes 4 are arranged in parallel and are interconnected, the high pressure pressure guiding pipe 3 and low pressure impulse of multiple connections
Pipe 4 is connected respectively to the high pressure port and low-pressure port of differential pressure transmitter after collecting.
Embodiment 12
Fig. 8 shows the Flow Measuring System with choke preventing function of the 12nd exemplary embodiment according to the present utility model
Schematic diagram.In this embodiment, Flow Measuring System includes 12 flow measurement devices, and 12 flow measurement devices are with rectangle
Array format combination installation, and the high pressure pressure guiding pipe of each flow measurement device communicates with each other, low pressure pressure guiding pipe also communicates with each other, more
The high pressure pressure guiding pipe and low pressure pressure guiding pipe of a connection are connected respectively to the high pressure port and low-pressure port of differential pressure transmitter after collecting.
Embodiment 13
Fig. 9 shows the Flow Measuring System with choke preventing function of the 13rd exemplary embodiment according to the present utility model
Schematic diagram.In this embodiment, Flow Measuring System includes 7 flow measurement devices, and 7 flow measurement devices are with axial symmetry
Form combination installation, wherein 1 flow measurement device is set at axle center, 6 flow measurement devices are uniformly distributed around axle center, and each
The high pressure pressure guiding pipe of flow measurement device communicates with each other, and low pressure pressure guiding pipe also communicates with each other, the high pressure pressure guiding pipe of multiple connections and
Low pressure pressure guiding pipe is connected respectively to the high pressure port and low-pressure port of differential pressure transmitter after collecting.
Each embodiment of the utility model is described above, above description is exemplary, and non-exclusive, and
And it is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for
Many modifications and changes will be apparent from for those skilled in the art.
Claims (16)
1. a kind of flow measurement device with choke preventing function, which is characterized in that including：
Pressure guide plate；
Rectification dust cover, the rectification dust cover are set to the side of the pressure guide plate, the rectification dust cover and the pilot
Plate surrounds the cavity to be formed and be connected with the outside of the rectification dust cover；
One end of high pressure pressure guiding pipe, the high pressure pressure guiding pipe is set in the cavity；
Low pressure pressure guiding pipe, one end of the low pressure pressure guiding pipe are set to one opposite with the rectification dust cover of the pressure guide plate
Side.
2. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the rectification dust cover
It is coaxially disposed with the pressure guide plate.
3. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that along with the rectification
The vertical direction of the axis of dust cover, the outer rim of the rectification dust cover are located at the inside of the outer rim of the pressure guide plate.
4. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the rectification dust cover
For taper or streamlined.
5. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the rectification dust cover
Section along its axial direction is parabola shaped.
6. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the pressure guide plate is square
Shape.
7. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the pressure guide plate is portion
Bulb separation face, and the rectification dust cover is set to the concave side of the spherical surface.
8. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the high pressure pressure guiding pipe
The other end pass through the pressure guide plate, and be connected with the high pressure port of differential pressure pick-up, the other end of the low pressure pressure guiding pipe
It is connected with the low-pressure port of differential pressure pick-up.
9. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the high pressure pressure guiding pipe
Described one end be wedge shape, when the flow measurement device is installed in tested pipeline, Open Side Down for described one end.
10. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the high pressure impulse
Described one end of pipe is L-shaped, and when the flow measurement device is installed in tested pipeline, Open Side Down for described one end.
11. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the low pressure impulse
Pipe is set between the pressure guide plate and the high pressure pressure guiding pipe.
12. the flow measurement device according to claim 11 with choke preventing function, which is characterized in that the low pressure impulse
Described one end of pipe is wedge shape, and is open towards the high pressure pressure guiding pipe.
13. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the rectification is dust-proof
Cover is equipped with through-hole or straight slot close to one end of the pressure guide plate, and the cavity is dust-proof by the through-hole or straight slot and the rectification
The outside of cover is connected.
14. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the rectification is dust-proof
Cover is set to the side of the pressure guide plate by least one supporting rod, the edge and the pressure guide plate of the rectification dust cover it
Between form gap, the cavity is connected by the gap with the outside of the rectification dust cover.
15. the flow measurement device according to claim 1 with choke preventing function, which is characterized in that the high pressure impulse
Pipe and low pressure pressure guiding pipe are multiple, and multiple high pressure pressure guiding pipes are arranged in parallel and are interconnected, and multiple low pressure pressure guiding pipes are parallel to be set
It sets and is interconnected.
16. a kind of Flow Measuring System with choke preventing function, which is characterized in that including appointing in multiple 1-15 according to claim
The high pressure pressure guiding pipe of the flow measurement device with choke preventing function described in one, each flow measurement device communicates with each other, low pressure
Pressure guiding pipe also communicates with each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793636.1U CN207610734U (en) | 2017-12-20 | 2017-12-20 | Flow measurement device with choke preventing function and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793636.1U CN207610734U (en) | 2017-12-20 | 2017-12-20 | Flow measurement device with choke preventing function and system |
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| CN207610734U true CN207610734U (en) | 2018-07-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907168A (en) * | 2017-12-20 | 2018-04-13 | 南京亿准纳自动化控制技术有限公司 | Flow measurement device and system with choke preventing function |
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2017
- 2017-12-20 CN CN201721793636.1U patent/CN207610734U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907168A (en) * | 2017-12-20 | 2018-04-13 | 南京亿准纳自动化控制技术有限公司 | Flow measurement device and system with choke preventing function |
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