CN207610734U - Flow measurement device with choke preventing function and system - Google Patents

Flow measurement device with choke preventing function and system Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
pressure
flow measurement
dust cover
guide plate
rectification
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201721793636.1U
Other languages
Chinese (zh)
Inventor
明晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Billion Para Automation Control Technology Co Ltd
Original Assignee
Nanjing Billion Para Automation Control Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Billion Para Automation Control Technology Co Ltd filed Critical Nanjing Billion Para Automation Control Technology Co Ltd
Priority to CN201721793636.1U priority Critical patent/CN207610734U/en
Application granted granted Critical
Publication of CN207610734U publication Critical patent/CN207610734U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Flow measurement device with choke preventing function and system
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.
CN201721793636.1U 2017-12-20 2017-12-20 Flow measurement device with choke preventing function and system Active CN207610734U (en)

Priority Applications (1)

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

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CN207610734U true CN207610734U (en) 2018-07-13

Family

ID=62799513

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721793636.1U Active CN207610734U (en) 2017-12-20 2017-12-20 Flow measurement device with choke preventing function and system

Country Status (1)

Country Link
CN (1) CN207610734U (en)

Similar Documents

Publication Publication Date Title
Dennis et al. Isokinetic sampling probes
CN2689181Y (en) Internal gyroscopic flow measuring shutoff apparatus
CN107907168A (en) Flow measurement device and system with choke preventing function
CN207610734U (en) Flow measurement device with choke preventing function and system
CN201007662Y (en) Wenke conical flowmeter
CN105628969B (en) Small bore fairing aerofoil profile air velocity transducer
CN205079804U (en) Throttling arrangement and throttling flow meter
CN2689182Y (en) Flow sensor for pressure differential measurement
CN209605887U (en) A kind of multi-parameter integral uniform velocity tube flowmeter
CN201653465U (en) V-shaped conical flowmeter
CN205317267U (en) Flow measuring device based on wing principle
CN202710113U (en) Steady state alpha sensor
CN201672941U (en) Chimney smoke flow measuring device
CN204988382U (en) Amount of wind measuring transducer
CN212082473U (en) Matrix flowmeter
CN208860411U (en) A kind of concave arc shape double fluid is to mean velocity tube flowmeter
CN209706872U (en) A kind of streamlined self-rectifying energy-saving appliance of spindle
CN211926970U (en) Plug-in type multi-throat-diameter Venturi tube flowmeter
CN210802566U (en) Vortex street flowmeter
CN206919943U (en) A kind of block-resistant type V cone flow meters
CN213180157U (en) Spray nozzle
CN206772360U (en) A kind of wing mean velocity tube flowmeter
CN209605890U (en) A kind of multiple spot arrangement block-resistant type flow measurement device
CN208998851U (en) The dedicated differential pressure type adjusting type flowmeter of natural gas
CN207064296U (en) Measure the device of ventilation blower exhaust air rate

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant