CN107907168A - Flow measurement device and system with choke preventing function - Google Patents

Flow measurement device and system with choke preventing function Download PDF

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Publication number
CN107907168A
CN107907168A CN201711386042.3A CN201711386042A CN107907168A CN 107907168 A CN107907168 A CN 107907168A CN 201711386042 A CN201711386042 A CN 201711386042A CN 107907168 A CN107907168 A CN 107907168A
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CN
China
Prior art keywords
pressure
measurement device
flow measurement
dust cover
guide plate
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Pending
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CN201711386042.3A
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Chinese (zh)
Inventor
明晓
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Nanjing Billion Para Automation Control Technology Co Ltd
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Nanjing Billion Para Automation Control Technology Co Ltd
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Application filed by Nanjing Billion Para Automation Control Technology Co Ltd filed Critical Nanjing Billion Para Automation Control Technology Co Ltd
Priority to CN201711386042.3A priority Critical patent/CN107907168A/en
Publication of CN107907168A publication Critical patent/CN107907168A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure

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 arranged at 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;High pressure pressure guiding pipe, one end of high pressure pressure guiding pipe are arranged in cavity;Low pressure pressure guiding pipe, one end of low pressure pressure guiding pipe are arranged on the side opposite with the dust cover of the plate.The flow measurement device can accurately measure flow, and have anti-blocking effect.

Description

Flow measurement device and system with choke preventing function
Technical field
The present invention relates to fluid measurement technical field, more particularly to a kind of flow measurement device with choke preventing function and it is System.
Background technology
At present, dirty gas flow measurement is increasingly important.The either blast furnace of smelter, converter, coke-stove gas, still The flue gas of thermal power plant discharge, and one secondary air flow of boiler, black furnace plume amount, powder ventilation quantity processed are required for carrying out accurately 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 rear straight pipe and the measured deviation easily caused by abrasion;Venturi tube, airfoil type wind Differential pressure caused by amount device is less than normal, and especially when flow velocity is low, signal-to-noise ratio is not big enough;Thermal flowmeter low-response, in quilt The occasion that measurement gas component changes greatly, because gas specific heat at constant pressure holds Cp values and thermal conductivity change, measured value has larger change Change and produce error;Various bars of class flowmeters are particularly easy to block, and the differential pressure produced is also less than normal.The skin support largely used at present Pipe and by its flowmeter for forming of improvement there is also it is easily stifled, differential pressure signal is unintelligible unstable the shortcomings that.Chinese patent CN107192846A、CN202512135U、CN201555612U、CN203848867U、CN204142296U、CN10601780A、 CN204740262U make use of the principle of differential pressure type Pitot tube, and using the pressure pipe that bore is larger, and set wherein can be The dust-removing rod to freely swing in certain amplitude, to solve the problems, such as dust accretions, fouling.It is unexcellent yet with overall structure Change, flow separation is not effectively controlled, and dust still easily accumulates fouling, while can also cause differential pressure signal 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.
The content of the invention
The present invention proposes a kind of flow measurement device and system with choke preventing function, it can overcome existing flow to survey Measure device differential pressure signal it is unstable, it is easy accumulation fouling the defects of.
One aspect of the present invention proposes a kind of flow measurement device with choke preventing function, including:
Pressure guide plate;
Rectification dust cover, the rectification dust cover are arranged at 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;
High pressure pressure guiding pipe, one end of the high pressure pressure guiding pipe are arranged in the cavity;
Low pressure pressure guiding pipe, one end of the low pressure pressure guiding pipe are arranged on 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, it is located at along the direction vertical with the axis of the rectification dust cover, the outer rim of the rectification dust cover 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 arranged at the concave side of the sphere.
Preferably, the other end of the high pressure pressure guiding pipe passes 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 arranged 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 arranged at the side of the pressure guide plate by least one supporting rod, described whole Flow and gap is formed between the edge of dust cover and the pressure guide plate, 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 that 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.
Another aspect of the present invention provides a kind of Flow Measuring System with choke preventing function, including multiple described having is prevented The flow measurement device of plugging function, the high pressure pressure guiding pipe of each flow measurement device communicate with each other, and low pressure pressure guiding pipe also communicates with each other.
The beneficial effects of the present invention 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 arranged 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 arranged on the lee side of pressure guide plate, stable low-voltage signal can be effectively obtained, so as to reach To accurate measurement flow and anti-blocking effect.
2. rectification dust cover can use taper or slender contour, to the drag minimization of fluid, so that farthest Permanent compression loss is reduced, it is stronger to be resistant to the impact capacity of fluids within pipes, 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 so made up of rectification dust cover and pressure guide plate ensure media flow in tested pipeline all the time can The place for producing minimum static pressure separates, 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, use can be combined in multiple flow measurement devices, 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 invention have the advantages that other characteristics and, these characteristics and advantage from the attached drawing being incorporated herein and with It will be apparent in embodiment afterwards, or by the attached drawing and subsequent embodiment being incorporated herein Middle to be stated in detail, these the drawings and specific embodiments are provided commonly for explaining the certain principles of the present invention.
Brief description of the drawings
Exemplary embodiment of the present is described in more detail in conjunction with the accompanying drawings, of the invention is above-mentioned and other Purpose, feature and advantage will be apparent, wherein, in exemplary embodiments of the present invention, identical reference numeral is usual Represent same parts.
Fig. 1 shows the structure of the flow measurement device with choke preventing function of the first exemplary embodiment according to the present invention Schematic diagram;
When Fig. 2 shows the work of the flow measurement device with choke preventing function of the first exemplary embodiment according to the present invention Fluid state figure;
Fig. 3 a, Fig. 3 b and Fig. 3 c show having for second, third and the 4th exemplary embodiment according to the present invention respectively The stereogram of the rectification dust cover of the flow measurement device of 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 embodiment according to the present invention respectively The stereogram of the pressure guide plate of flow measurement device with choke preventing function;
Fig. 5 shows the part of the flow measurement device with choke preventing function of the tenth exemplary embodiment according to the present invention Schematic diagram;
Fig. 6 and Fig. 7 shows that the flow with choke preventing function of the 11st exemplary embodiment according to the present invention is surveyed respectively Measure the structure diagram and scheme of installation of device;
What Fig. 8 and Fig. 9 showed the 12nd and the 13rd exemplary embodiment according to the present invention respectively has choke preventing function Flow Measuring System schematic diagram.
Description of reference numerals:
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.
Embodiment
The present invention is more fully described below with reference to accompanying drawings.Although showing the preferred embodiment of the present invention in attached drawing, However, it is to be appreciated that the present invention is may be realized in various forms without should be limited by embodiments set forth here.Conversely, there is provided These embodiments are of the invention more thorough and complete in order to make, and can will fully convey the scope of the invention to ability The technical staff in domain.
Flow measurement device according to an exemplary embodiment of the present invention with choke preventing function includes:
Pressure guide plate;
Rectification dust cover, rectification dust cover are arranged at 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;
High pressure pressure guiding pipe, one end of high pressure pressure guiding pipe are arranged in cavity;
Low pressure pressure guiding pipe, one end of low pressure pressure guiding pipe are arranged on 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 pressure guide plate is flowed through Dynamic separation, pressure reduce so as to form the relatively low build-up of pressure area of a pressure suddenly, and low pressure pressure guiding pipe obtains low pressure and gathers The pressure of Ji Qu.Pass through the two pressure, you can calculate corresponding flow value.
Flow measurement device with choke preventing function according to embodiments of the present invention passes through rectification dust cover and pressure guide plate bag The cavity to be formed and be connected with the outside of rectification dust cover is enclosed, one end of high pressure pressure guiding pipe is arranged in the cavity, can effectively obtain The high-voltage signal that must stablize, and it is avoided that dust impurity etc. blocks the tracting pressuring hole of high pressure pressure guiding pipe, low pressure pressure guiding pipe is arranged on pilot The lee side of plate, can effectively obtain stable low-voltage signal, so as to reach accurate measurement flow and anti-blocking effect.
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 all the time can The place for producing minimum static pressure separates, and ensure that the output of stable, high s/n ratio differential pressure signal.
In one example, rectification dust cover is taper or streamlined, for example, rectification dust cover can be cone, Pyramid or curved cone, rectification dust cover can also be bullet-shaped.Preferably, rectification dust cover cuing open along its axial direction Face is parabola shaped, and in other words, rectification dust cover is formed by axis rotation of the one section of parabola around rectification dust cover.It is above-mentioned The shape of rectification dust cover can ensure drag minimization of the rectification dust cover to fluid, so as to farthest reduce permanent The pressure loss, it is stronger to be resistant to the impact capacity of fluids within pipes, more durable.
In one example, pressure guide plate is spherical calotte, and rectification dust cover is arranged at the concave side of sphere.Change speech It, the concave surface of sphere is fluoran stream surface, and convex surface is lee side.So be conducive to form metastable high pressure aggregation in the cavity 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 passes 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 collection, differential pressure value Δ P therebetween is determined, so as 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, one end being arranged in cavity of high pressure pressure guiding pipe is wedge shape, when flow measurement device is installed on When in tested pipeline, Open Side Down for described one end, to further improve 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 arranged on 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, further to prevent dust dirt accumulation from blocking.
In one example, low pressure pressure guiding pipe is arranged between pressure guide plate and high pressure pressure guiding pipe.Preferably, low pressure pressure guiding pipe Described one end (i.e. arranged on one end of the side opposite with rectification dust cover of pressure guide plate) for wedge shape, and opening draw towards high pressure Pressure pipe, that is, install 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 set 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 at the same time Multiple high pressure pressure guiding pipes and low pressure pressure guiding pipe are put, 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 is 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 embodiment of the present invention also provides a kind of Flow Measuring System with choke preventing function, including multiple described having is prevented The flow measurement device of plugging function, the high pressure pressure guiding pipe of each flow measurement device communicates with each other, and low pressure pressure guiding pipe also connects each other Logical, it is suitable for the situation that the caliber of tested pipeline is larger.
In one example, multiple flow measurement devices are set 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 set 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 The high pressure port and low-pressure port of differential pressure transmitter are not connected to.
Embodiment one
Fig. 1 shows the structure of the flow measurement device with choke preventing function of the first exemplary embodiment according to the present invention Schematic diagram, when Fig. 2 shows the work of the flow measurement device with choke preventing function of the first exemplary embodiment according to the present invention Fluid state figure.
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 arranged at the side of pressure guide plate 2, and rectification dust cover 1 surrounds shape with pressure guide plate 2 The cavity being connected into the outside with rectification dust cover 1;
High pressure pressure guiding pipe 3, one end of high pressure pressure guiding pipe 3 are arranged in cavity;
Low pressure pressure guiding pipe 4, one end of low pressure pressure guiding pipe 4 are arranged on the side opposite with rectification dust cover of pressure guide plate.
Wherein, rectification dust cover 1 is bullet-shaped that pressure guide plate 2 is spherical calotte, and rectification dust cover 1 and pressure guide plate 2 are coaxially set Put, and rectification dust cover 1 is fixed on the concave surface of pressure guide plate 2 by multiple supporting rods 5.Between rectification dust cover 1 and pressure guide plate 2 Gap is formed, cavity can be connected by the gap with the exterior of rectification dust cover 1.
High pressure pressure guiding pipe 3 is L-type, and its one end is arranged in cavity, and the other end is through pressure guide plate 2 and is connected to differential pressure transmitter 7 high pressure port.One end being arranged in cavity of high pressure pressure guiding pipe 3 is wedge shape, and Open Side Down.Low pressure pressure guiding pipe 4 is straight line Type, it is arranged between pressure guide plate 2 and high pressure pressure guiding pipe 3.The pressure end of low pressure pressure guiding pipe 4 is arranged on 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 time, 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 pressure guide plate is flowed through for measured medium, pressure Power reduces so as 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 during flow measurement device work, and arrow represents the flow direction of fluid in figure.Such as Fig. 2 institutes Show, in the leading edge of pressure guide plate, flow blockage, conducts to that can cause build-up of pressure in rectification dust cover, form high pressure accumulation regions; Flowing separates after pressure guide plate, and pressure reduces, and forms low pressure accumulation regions.Differential pressure transmitter 7 gathers 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
According to the present invention the flow measurement device with choke preventing function of second, third and the 4th exemplary embodiment and Difference lies in the shape of rectification dust cover is different for first exemplary embodiment.Fig. 3 a, Fig. 3 b and Fig. 3 c are shown according to this respectively Second, third of invention is vertical with the rectification dust cover of the flow measurement device with choke preventing function of the 4th exemplary embodiment Body figure.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 All be conducive to reduce resistance of the rectification dust cover to fluid.
Embodiment five to nine
The flow measurement device and first with choke preventing function of 5th to the 9th exemplary embodiment according to the present invention Difference lies in the shape of pressure guide plate is different for exemplary embodiment.Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d and Fig. 4 e show basis respectively The stereogram of the pressure guide plate of the flow measurement device with choke preventing function of the 5th to the 9th exemplary embodiment of the present invention. In Fig. 4 a illustrated embodiments, pressure guide plate is curved surface;In Fig. 4 b illustrated embodiments, pressure guide plate is disk;In implementation shown in Fig. 4 c In example, pressure guide plate is square hypocrateriform;In Fig. 4 d illustrated embodiments, the top half of pressure guide plate is curved surface, the latter half For rectangle;In Fig. 4 e illustrated embodiments, pressure guide plate is round rectangle.Fig. 4 b, Fig. 4 d and the straight pressure guide plate shown in Fig. 4 e Be conducive to dust under some operating modes to be scattered, be not easy to accumulate.Fig. 4 c, Fig. 4 d and the pressure guide plate that the outer contour shown in Fig. 4 e is rectangle Cross section suitable for tested pipeline is the situation of rectangle, and in this case, the outer contour of pressure guide plate can be by by measured tube The cross section in road in all directions scaled down and obtain, it is preferable that do at fillet or chamfering on each vertex of pressure guide plate Reason.
Embodiment ten
Fig. 5 shows the part of the flow measurement device with choke preventing function of the tenth exemplary embodiment according to the present invention Schematic diagram.The flow measurement device and the first exemplary reality with choke preventing function of tenth exemplary embodiment according to the present invention The shape that example is applied difference lies in one end of high pressure pressure guiding pipe is different.As shown in figure 5, be arranged in cavity the one of high pressure pressure guiding pipe Hold as L-shaped, when flow measurement device is installed in tested pipeline, Open Side Down for described one end, further to prevent dust Dirt accumulation is blocked.
Embodiment 11
Fig. 6 and Fig. 7 shows that the flow with choke preventing function of the 11st exemplary embodiment according to the present invention is surveyed respectively Measure the structure diagram and scheme of installation of device.As shown in Figure 6 and Figure 7, rectification dust cover 1 and deflector 2 are 4, shape Linear array, while set multiple high pressure pressure guiding pipes 3 and low pressure pressure guiding pipe 4, multiple high pressure pressure guiding pipes 3 are arranged in parallel and mutually Connection, multiple low pressure pressure guiding pipes 4 are arranged in parallel and are interconnected, and the high pressure pressure guiding pipe 3 and low pressure pressure guiding pipe 4 of multiple connections collect The high pressure port and low-pressure port of differential pressure transmitter are connected respectively to afterwards.
Embodiment 12
Fig. 8 shows showing for the Flow Measuring System with choke preventing function of the 12nd exemplary embodiment according to the present invention It is intended to.In this embodiment, Flow Measuring System includes 12 flow measurement devices, and 12 flow measurement devices are with rectangular array Form 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, Duo Gelian Logical high pressure pressure guiding pipe and low pressure pressure guiding pipe is connected respectively to the high pressure port and low-pressure port of differential pressure transmitter after collecting.
Embodiment 13
Fig. 9 shows showing for the Flow Measuring System with choke preventing function of the 13rd exemplary embodiment according to the present invention It is intended to.In this embodiment, Flow Measuring System includes 7 flow measurement devices, and 7 flow measurement devices are with axial symmery shape Combination installation, wherein 1 flow measurement device is arranged at axle center, 6 flow measurement devices are evenly distributed with around axle center, and each flow The high pressure pressure guiding pipe of measuring device communicates with each other, and low pressure pressure guiding pipe also communicates with each other, the high pressure pressure guiding pipe and low pressure of multiple connections Pressure guiding pipe is connected respectively to the high pressure port and low-pressure port of differential pressure transmitter after collecting.
Various embodiments of the present invention are described above, described above is exemplary, and non-exclusive, and It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill Many modifications and changes will be apparent from for the those of ordinary skill in art field.

Claims (16)

  1. A kind of 1. flow measurement device with choke preventing function, it is characterised in that including:
    Pressure guide plate;
    Rectification dust cover, the rectification dust cover are arranged at 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;
    High pressure pressure guiding pipe, one end of the high pressure pressure guiding pipe are arranged in the cavity;
    Low pressure pressure guiding pipe, one end of the low pressure pressure guiding pipe are arranged on one opposite with the rectification dust cover of the pressure guide plate Side.
  2. 2. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the rectification dust cover It is coaxially disposed with the pressure guide plate.
  3. 3. the flow measurement device according to claim 1 with choke preventing function, it is characterised 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. 4. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the rectification dust cover For taper or streamlined.
  5. 5. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the rectification dust cover It is parabola shaped along the section of its axial direction.
  6. 6. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the pressure guide plate is square Shape.
  7. 7. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the pressure guide plate is portion Bulb separation face, and the rectification dust cover is arranged at the concave side of the sphere.
  8. 8. the flow measurement device according to claim 1 with choke preventing function, it is characterised 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. 9. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the high pressure pressure guiding pipe Described one end for wedge shape, when the flow measurement device is installed in tested pipeline, Open Side Down for described one end.
  10. 10. the flow measurement device according to claim 1 with choke preventing function, it is characterised 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. 11. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the low pressure impulse Pipe is arranged between the pressure guide plate and the high pressure pressure guiding pipe.
  12. 12. the flow measurement device according to claim 11 with choke preventing function, it is characterised 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. 13. the flow measurement device according to claim 1 with choke preventing function, it is characterised 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. 14. the flow measurement device according to claim 1 with choke preventing function, it is characterised in that the rectification is dust-proof Cover is arranged at 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. 15. the flow measurement device according to claim 1 with choke preventing function, it is characterised 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 Put and be interconnected.
  16. 16. a kind of Flow Measuring System with choke preventing function, it is characterised in that including appointing in multiple 1-15 according to claim The flow measurement device with choke preventing function described in one, the high pressure pressure guiding pipe of each flow measurement device communicate with each other, low pressure Pressure guiding pipe also communicates with each other.
CN201711386042.3A 2017-12-20 2017-12-20 Flow measurement device and system with choke preventing function Pending CN107907168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711386042.3A CN107907168A (en) 2017-12-20 2017-12-20 Flow measurement device and system with choke preventing function

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Application Number Priority Date Filing Date Title
CN201711386042.3A CN107907168A (en) 2017-12-20 2017-12-20 Flow measurement device and system with choke preventing function

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111351532A (en) * 2020-04-29 2020-06-30 南京润楠医疗电子研究院有限公司 Bidirectional double-pressure-difference type respiratory flow detection sensing device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111351532A (en) * 2020-04-29 2020-06-30 南京润楠医疗电子研究院有限公司 Bidirectional double-pressure-difference type respiratory flow detection sensing device and method
CN111351532B (en) * 2020-04-29 2022-03-18 南京润楠医疗电子研究院有限公司 Bidirectional double-pressure-difference type respiratory flow detection sensing device and method

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