CN204831400U - Steady voltage formula low discharge wind speed amount of wind measuring device - Google Patents

Steady voltage formula low discharge wind speed amount of wind measuring device Download PDF

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Publication number
CN204831400U
CN204831400U CN201520633131.3U CN201520633131U CN204831400U CN 204831400 U CN204831400 U CN 204831400U CN 201520633131 U CN201520633131 U CN 201520633131U CN 204831400 U CN204831400 U CN 204831400U
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Prior art keywords
pressure
venturi tube
tube
buffer tank
static pressure
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CN201520633131.3U
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Chinese (zh)
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田必勇
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Nanjing Yi Hua environmental Polytron Technologies Inc
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Nanjing Supporting Co Ltd Of Color Environmental Engineering Of Benefit
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Abstract

The utility model provides a steady voltage formula low discharge wind speed amount of wind measuring device belongs to the fluid measurement field. It includes: dynamic pressure surge tank, static pressure surge tank, differential pressure transmitter and two get the pressure unit. Getting and pressing the unit to set up in the wind channel, dynamic pressure surge tank, static pressure surge tank, differential pressure transmitter all are located outside the wind channel. Every is got and presses the unit to include interior venturi, outer venturi, be used for the static pressure tube of measuring interior venturi's dynamic pressure measuring tube and being used for measuring outer venturi, and interior venturi is coaxial to be cup jointed in outer venturi. Two dynamic pressure measuring tubes of getting the pressure unit communicate each other and communicate with the dynamic pressure surge tank, get the mutual intercommunication of the static pressure tubes of pressing the unit and communicate with the static pressure surge tank for two, and dynamic pressure surge tank, static pressure surge tank still are connected with differential pressure transmitter respectively. The utility model is suitable for a low discharge fluidic wind speed, amount of wind survey can effectively be avoided because pressure differential is low excessively in the measurement process, problem that the pressure differential signal is lost.

Description

Type voltage regulation low discharge wind speed and wind measuring device
Technical field
The utility model relates to field of fluid measurement, in particular to a kind of type voltage regulation low discharge wind speed and wind measuring device.
Background technology
At present, the flow velocity of boiler smoke, the measurement majority of flow adopt single-point type Pitot tube flowmeter.In practice, there is following problem in the metering system of single-point Pitot tube flowmeter: (1) cannot be measured accurately at gas flow hour, and measuring-signal is very easy to lose.(2) air-flow flowed in flue, the differential pressure produced in low flow velocity situation is very low, causes flow to show or cannot the problem such as Measurement accuracy, signal deletion.
Utility model content
The purpose of this utility model is to provide a kind of type voltage regulation low discharge wind speed and wind measuring device, avoids the problem causing measuring-signal to lack because differential pressure is little, to realize air quantity, the measuring wind speed to low discharge fluid.
The utility model is achieved in that
Type voltage regulation low discharge wind speed and wind measuring device, for measuring the gas flow rate flow in air channel, comprise: dynamic pressure buffer tank, static pressure buffer tank, differential pressure transmitter and two pressure unit, two described pressure unit are arranged in described air channel, described dynamic pressure buffer tank, described static pressure buffer tank, described differential pressure transmitter is all positioned at outside described air channel, each described pressure unit includes inner venturi tube, outer Venturi tube, for measuring the dynamic pressure measurement pipe of described inner venturi tube and the static pressure tube for measuring described outer Venturi tube, described inner venturi tube coaxial sleeve is connected in described outer Venturi tube,
The dynamic pressure measurement pipe of two described pressure unit is interconnected and is communicated with described dynamic pressure buffer tank, the static pressure tube of two described pressure unit is interconnected and is communicated with described static pressure buffer tank, and described dynamic pressure buffer tank, described static pressure buffer tank are also connected with described differential pressure transmitter respectively.
Preferably, two described pressure unit are arranged along the axisymmetrical in described air channel.Two pressure unit of rotational symmetry distribution, can measure the pressure information of same fluid movement section, make the data measured more accurately with consistent.
Preferably, also comprise: dynamic pressure three-way pipe, static pressure three-way pipe, described dynamic pressure buffer tank is connected by the dynamic pressure measurement pipe of described dynamic pressure three-way pipe with two described pressure unit, and described static pressure buffer tank is connected by the static pressure tube of described static pressure three-way pipe with two described pressure unit.Three-way pipe structure is simple, easy to use, for by the fluid chemical field of different pipeline, the direction of motion of alter.
Preferably, described dynamic pressure measurement pipe is communicated with described inner venturi tube, and described static pressure tube is communicated with described outer Venturi tube.
Preferably, the trunnion of described inner venturi tube is provided with interior pressure port, the trunnion of described outer Venturi tube is provided with outer pressure port, described dynamic pressure measurement pipe stretches in described inner venturi tube through described interior pressure port, and described static pressure tube stretches in described outer Venturi tube through described outer pressure port.
Preferably, also comprise: two connectors, described dynamic pressure buffer tank, described static pressure buffer tank are connected with described differential pressure transmitter respectively by a described connector.By connector, positive buffer tank, negative buffer tank are connected, can connect quickly and easily, avoid the situation positive buffer tank occurring, negative buffer tank is separated with differential pressure transmitter.
Preferably, also comprise: sleeving connecting rod, described outer Venturi tube is connected with described inner venturi tube by described sleeving connecting rod, described sleeving connecting rod is arranged along the radial direction of described inner venturi tube, one end of described sleeving connecting rod is connected with the outer tube wall of described inner venturi tube, and the other end of described sleeving connecting rod is connected with the inner tubal wall of described outer Venturi tube.Outer Venturi tube and inner venturi tube connect as one by sleeving connecting rod, prevent between two pipes, relative motion occurring in measuring process, thus the interference be subject to when reducing fluid motion, guarantee the accuracy of measurement data.
Preferably, also comprise: fixed bar, described outer Venturi tube is arranged in described air channel by described fixed bar, described fixed bar is arranged along the radial direction of described outer Venturi tube, one end of described fixed bar is connected with the outer tube wall of described outer Venturi tube, and the other end of described fixed bar is connected with described air channel.By fixing downlink connection air channel and outer Venturi tube, be applicable to the environment that air channel is relatively little, fixed bar can be avoided to affect the proper flow of fluid.
Preferably, also comprise wing plate, described outer Venturi tube is connected in described air channel by described wing plate.The connection of wing plate is more firmly with stable, and outer Venturi tube more not easily shakes.
Preferably, dynamic pressure measurement pipe, static pressure tube are made by steel.Steel strength is high, be not easy infringement, can bear the impact of external fluid, improves serviceable life.
The beneficial effects of the utility model:
The utility model provides a kind of type voltage regulation low discharge wind speed and wind measuring device, and this device comprises two groups of pressure unit and dynamic pressure buffer tank, static pressure buffer tank, often organizes pressure unit and comprises two Venturi tubes being socketed on one.This measurement device can obtain stable differential pressure when the flow velocity of fluid is lower, so that differential pressure transmitter accurately obtains differential pressure data, and then gets the measurement data such as wind speed, air quantity.Adopt the double venturi arrangement being socketed and being integrated, outer Venturi tube plays the effect of rectification to the air-flow entering inner venturi tube, and the air flowing of inner venturi tube is more steady, is conducive to measuring.The setting of dynamic pressure buffer tank and static pressure buffer tank then makes measurement mechanism air mass flow is less in air channel, still can obtain enough pressure difference values, so that differential pressure transmitter can normally work.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation of the outer Venturi tube in the type voltage regulation low discharge flow velocity apparatus for measuring air quantity that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the axial cross section structural representation of the outer Venturi tube in Fig. 1;
The structural representation of the inner venturi tube in the type voltage regulation low discharge flow velocity apparatus for measuring air quantity that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the axial cross section structural representation of the inner venturi tube in Fig. 3;
The structural representation of the pressure unit in the type voltage regulation low discharge flow velocity apparatus for measuring air quantity that Fig. 5 provides for the utility model embodiment; (not comprising sleeving connecting rod)
The structural representation of the pressure unit in the type voltage regulation low discharge flow velocity apparatus for measuring air quantity that Fig. 6 provides for the utility model embodiment;
Structural representation in the type voltage regulation low discharge flow velocity apparatus for measuring air quantity that Fig. 7 provides for the utility model embodiment.
Description of reference numerals
Outer Venturi tube 101; Second equal diameter entrance 102; Second contraction section 103;
Second equal diameter trunnion section 104; Second diffuser 105; Inner venturi tube 201;
First contraction section 202; First equal diameter trunnion section 203; First diffuser 204;
Static pressure tube 301; Dynamic pressure measurement pipe 302; Differential pressure transmitter 401;
Dynamic pressure buffer tank 402; Static pressure buffer tank 403; Air channel 501.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In description of the present utility model, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this utility model product orientation of usually putting or position relationship when using, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
When the gas of measurement low discharge, low speed, the flow of fluid by the pressure reduction of the cross section point of fluid flow direction, and then can measure the flow by the fluid in this cross section in certain hour.But due to, the pressure reduction that low velocity fluid flows through a certain interface is less, is not easy measured, and due to flow little, the instability of pressure signal may be there is, the situation of even losing.In order to solve the problem, usually need pressure reduction to be amplified, keeps the stable of pressure reduction, the data such as flow, flow velocity of low flow velocity, low discharge fluid can be measured exactly.The present inventor, by the measurement mechanism researching and proposing a kind of wind speed air quantity for measuring low discharge fluid, achieves the measurement to low flow velocity, low discharge fluid.
Consulting Fig. 1 to Fig. 7, present embodiments providing a kind of type voltage regulation low discharge wind speed and wind measuring device, for measuring the gas flow rate flow in air channel.This measurement mechanism comprises: dynamic pressure buffer tank 402, static pressure buffer tank 403, differential pressure transmitter 401 and two pressure unit.Wherein, two pressure unit are arranged in air channel 501, and dynamic pressure buffer tank 402, static pressure buffer tank 403, differential pressure transmitter 401 are all positioned at outside described air channel 501.
Each pressure unit includes inner venturi tube 201, outer Venturi tube 101, for measuring the dynamic pressure measurement pipe 302 of inner venturi tube 201 and the static pressure tube 301 for measuring outer Venturi tube 101, inner venturi tube 201 coaxial sleeve is connected in outer Venturi tube 101.The dynamic pressure measurement pipe 302 of two pressure unit is interconnected and is communicated with dynamic pressure buffer tank 402, the static pressure tube 301 of two pressure unit is interconnected and is communicated with static pressure buffer tank 403, and dynamic pressure buffer tank 402, static pressure buffer tank 403 are also connected with differential pressure transmitter 401 respectively.
Differential pressure transmitter is a kind of equipment comparatively conventional in industrial practice, and it is widely used in various industry automatic control environment, relates to waterpower, electric power, petrochemical industry etc. field.Differential pressure transmitter is the pressure differential that a class measures pumped (conveying) medium in various pipe system, and the differential pressure value of measurement is converted to by the conversion of data the equipment that current signal exports.Differential pressure transmitter is different from general pressure unit, and they all have positive pressure side and negative pressure end two pressure interfaces, and two interfaces input corresponding to the fluid of different pressures.
Venturi tube is made based on Venturi effect, and it generally comprises the equal diameter entrance connected successively, contraction section, equal diameter trunnion section and diffuser.The caliber of contraction section is reduced to equal diameter trunnion section gradually by equal diameter entrance; The caliber of diffuser is along with gradually away from equal diameter trunnion section, and its caliber constantly increases.By the pressure reduction in measuring channel, flow can be tried to achieve.For liquid, Venturi tube is directly installed piezometric tube and is measured pressure reduction, for gas, then to need the Output pressure of fluid by pipeline, to pressure measuring device, to utilize this pressure measuring device to measure pressure reduction.In the present embodiment, inner venturi tube 201 comprises the first contraction section 202, first equal diameter trunnion section 203 and the first diffuser 204, and outer Venturi tube 101 comprises the second equal diameter entrance 102, second contraction section 103, second equal diameter trunnion section 104 and the second diffuser 105.Outer Venturi tube 101 pairs of inner venturi tubes 201 play the effect of suction, rectification, fluid enters inner venturi tube 201 to the motion of its trunnion section, is improved constantly, enter trunnion section and reach peak value at contraction section fluid by the flow velocity of compressed fluid, the pressure stability of fluid, measurement mechanism obtains pressure reduction and increases.
The principle of work of this measurement mechanism is: pressure unit is used for the air in air channel 501 to derive, by buffer tank, the discharge pressure of fluid is carried out amplifying, stablizing again, prevent due to air flue inner fluid flow, flow velocity is too little and can not produce effective working pressure, guarantees that differential pressure transmitter 401 can obtain differential pressure accurately.Amplified by buffer tank, stable after air pressure enter in differential pressure transmitter 401, pressure directly acts on the diaphragm of differential pressure transmitter 401, diaphragm is made to produce the micrometric displacement be directly proportional to pressure medium, thus the resistance value of the sensor of differential pressure transmitter 401 inside is changed, and be finally converted to differential pressure signal.
The conveniently connection of inner venturi tube 201 and outer Venturi tube 101 in pressure unit, type voltage regulation low discharge wind speed and wind measuring device also comprises sleeving connecting rod, and outer Venturi tube 101 is connected with inner venturi tube 201 by sleeving connecting rod.Sleeving connecting rod is arranged along the radial direction of inner venturi tube 201, and one end of sleeving connecting rod is connected with the outer tube wall of inner venturi tube 201, and the other end of sleeving connecting rod is connected with the inner tubal wall of outer Venturi tube 101.Inner venturi tube 201 and outer Venturi tube 101 couple together by the radial sleeving connecting rod arranged, and not easily relative motion occurs between the two, when air flows through between the two, disturbance is little, and stable gas pressure is beneficial to the accuracy improving and measure.
Preferably, type voltage regulation low discharge wind speed and wind measuring device also comprises fixed bar, and outer Venturi tube 101 is arranged in air channel 501 by fixed bar.Fixed bar is arranged along the radial direction of outer Venturi tube 101, and one end of fixed bar is connected with the outer tube wall of outer Venturi tube 101, and the other end of fixed bar is connected with air channel 501.As another kind of implementation, type voltage regulation low discharge wind speed and wind measuring device, also comprise wing plate, outer Venturi tube 101 is connected in air channel 501 by wing plate, outer Venturi tube 101 can be firmly fixed in air channel 501 by wing plate more, reduce rocking of outer Venturi tube 101, thus pressure unit is fixed.
The pressure output end of dynamic pressure buffer tank and the pressure output end of static pressure buffer tank are connected with the malleation end interface of differential pressure transmitter 401, negative pressure end interface respectively, the pressure of the different sizes of two interfaces acts on differential pressure transmitter 401, then pressure differential is converted to electric signal and exports.Conveniently in the connection of dynamic pressure buffer tank, static pressure buffer tank and differential pressure transmitter 401, type voltage regulation low discharge wind speed and wind measuring device also comprises: two connectors, and dynamic pressure buffer tank 402, static pressure buffer tank 403 are connected with differential pressure transmitter 401 respectively by a connector.Connector can adopt air rapid-acting coupling or use to arrange threaded steel pipe.Dynamic pressure buffer tank and static pressure buffer tank all have intake interface and interface of giving vent to anger, and export for steady pressure; When hypotony, can by regulating the output of pressure.Buffer tank is commercial equipment, and the present embodiment does not elaborate to its concrete structure.
Preferably, two pressure unit are arranged along the axisymmetrical in air channel 501.Because two pressure unit side by side parallel are arranged in air channel 501, both are in the cross section in same air channel 501, then the pressure of the measurement point of two pressure unit is consistent, and the pressure of acquisition is more accurate.When air channel 501 internal diameter constantly changes, the flow, flow velocity, pressure etc. of the air in air channel 501 change, if the position that two pressure unit are arranged in air channel 501 is not in the same cross section in air channel 501, so because two pressure measured by pressure unit are inconsistent, build-up of pressure data inaccurate, thus the measurement of fluid flow, flow velocity may be caused to be forbidden.In addition, two pressure unit are arranged along the axisymmetrical in air channel 501, air in air channel 501 is simultaneously through two pressure unit, and leave two pressure unit simultaneously, thus avoiding the mutual interference of the air-flow between two pressure unit, the air quantity making to measure, wind speed can the truths of air in accurate response air channel 501.
In order to measure the fluid of low discharge, the dynamic pressure measurement pipe 302 of two pressure unit is communicated with, and the static pressure tube of two pressure unit is communicated with.Because two dynamic pressure measurement pipes 302 are communicated with, then the air-flow of two dynamic pressure measurement pipe 302 acquisitions may be incorporated in together, thus improves the measured value of dynamic pressure; Correspondingly, because two static pressure tubes are communicated with, then the pressure of two static pressure tube acquisitions may be incorporated in together, thus improves the measured value of negative pressure.As a kind of implementation, dynamic pressure measurement pipe 302 can adopt Y-pipe, and two of Y-pipe are connected with an inner venturi tube 201 by all means respectively, and its 3rd is then connected with dynamic pressure buffer tank 402 by all means; Static pressure tube 301 can adopt Y-pipe equally, and wherein two arms of this Y-pipe respectively Venturi tube 101 outer with are connected, and the 3rd arm is then connected with static pressure buffer tank 403.As another kind of implementation, type voltage regulation low discharge wind speed and wind measuring device also comprises: dynamic pressure three-way pipe, static pressure three-way pipe, dynamic pressure measurement pipe 302, the dynamic pressure buffer tank 402 of two pressure unit are connected by dynamic pressure three-way pipe, and static pressure tube 301, the static pressure buffer tank 403 of two pressure unit are connected by static pressure three-way pipe.The use of three-way pipe, the dynamic pressure measurement pipe 302 of two pressure unit can be arranged relatively independently, the static pressure tube 301 of two pressure unit also can be arranged relatively independently, thus the layout difficulty of dynamic pressure measurement pipe 302, static pressure tube 301 can be reduced, can according to the situation of air channel 501 design feature and outside installation environment, adjust dynamic pressure measurement pipe 302, the installation site of static pressure tube 301 and Installation posture adaptively.
Dynamic pressure measurement pipe 302 is communicated with inner venturi tube 201, static pressure tube 301 is communicated with outer Venturi tube 101, dynamic pressure measurement pipe 302 is for measuring the pressure at inner venturi tube 201 trunnion place, and static pressure tube 301 is for measuring the pressure at the entrance place of outer Venturi tube 101.Preferably, inner venturi tube 201 is provided with interior pressure port, and outer Venturi tube 101 is provided with outer pressure port, and dynamic pressure measurement pipe 302 stretches in inner venturi tube 201 through interior pressure port, and static pressure tube 301 stretches in outer Venturi tube 101 through outer pressure port.Directly pressure port is set at measurement point, measured value more accurately can be obtained, avoid the installation of dynamic pressure measurement pipe 302 and static pressure tube 301 to bother.Because dynamic pressure measurement pipe 302 and static pressure tube 301 need the pressure transmitting air in air channel 501, the change of its caliber can have influence on pressure and normally carry, therefore, dynamic pressure measurement pipe 302, static pressure tube 301 all adopt steel to make, steel have higher intensity, buckle resistance, can reduce be extruded, the situation such as bending, thus guarantee the normal transmission of pressure.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. a type voltage regulation low discharge wind speed and wind measuring device, for measuring the gas flow rate flow in air channel, it is characterized in that, comprise: dynamic pressure buffer tank, static pressure buffer tank, differential pressure transmitter and two pressure unit, two described pressure unit are arranged in described air channel, described dynamic pressure buffer tank, described static pressure buffer tank, described differential pressure transmitter is all positioned at outside described air channel, each described pressure unit includes inner venturi tube, outer Venturi tube, for measuring the dynamic pressure measurement pipe of described inner venturi tube and the static pressure tube for measuring described outer Venturi tube, described inner venturi tube coaxial sleeve is connected in described outer Venturi tube,
The dynamic pressure measurement pipe of two described pressure unit is interconnected and is communicated with described dynamic pressure buffer tank, the static pressure tube of two described pressure unit is interconnected and is communicated with described static pressure buffer tank, and described dynamic pressure buffer tank, described static pressure buffer tank are also connected with described differential pressure transmitter respectively.
2. type voltage regulation low discharge wind speed and wind measuring device according to claim 1, is characterized in that, two described pressure unit are arranged along the axisymmetrical in described air channel.
3. type voltage regulation low discharge wind speed and wind measuring device according to claim 1 and 2, it is characterized in that, also comprise: dynamic pressure three-way pipe, static pressure three-way pipe, described dynamic pressure buffer tank is connected by the dynamic pressure measurement pipe of described dynamic pressure three-way pipe with two described pressure unit, and described static pressure buffer tank is connected by the static pressure tube of described static pressure three-way pipe with two described pressure unit.
4. type voltage regulation low discharge wind speed and wind measuring device according to claim 1, it is characterized in that, described dynamic pressure measurement pipe is communicated with described inner venturi tube, and described static pressure tube is communicated with described outer Venturi tube.
5. type voltage regulation low discharge wind speed and wind measuring device according to claim 4, it is characterized in that, described inner venturi tube is provided with interior pressure port, described outer Venturi tube is provided with outer pressure port, described dynamic pressure measurement pipe stretches in described inner venturi tube through described interior pressure port, and described static pressure tube stretches in described outer Venturi tube through described outer pressure port.
6. type voltage regulation low discharge wind speed and wind measuring device according to claim 1, is characterized in that, also comprise: two connectors, and described dynamic pressure buffer tank, described static pressure buffer tank are connected with described differential pressure transmitter respectively by a described connector.
7. type voltage regulation low discharge wind speed and wind measuring device according to claim 1, it is characterized in that, also comprise: sleeving connecting rod, described outer Venturi tube is connected with described inner venturi tube by described sleeving connecting rod, described sleeving connecting rod is arranged along the radial direction of described inner venturi tube, one end of described sleeving connecting rod is connected with the outer tube wall of described inner venturi tube, and the other end of described sleeving connecting rod is connected with the inner tubal wall of described outer Venturi tube.
8. type voltage regulation low discharge wind speed and wind measuring device according to claim 7, it is characterized in that, also comprise: fixed bar, described outer Venturi tube is arranged in described air channel by described fixed bar, described fixed bar is arranged along the radial direction of described outer Venturi tube, one end of described fixed bar is connected with the outer tube wall of described outer Venturi tube, and the other end of described fixed bar is connected with described air channel.
9. type voltage regulation low discharge wind speed and wind measuring device according to claim 7, it is characterized in that, also comprise wing plate, described outer Venturi tube is connected in described air channel by described wing plate.
10. the type voltage regulation low discharge wind speed and wind measuring device according to claim 1 or 9, it is characterized in that, dynamic pressure measurement pipe, static pressure tube are made by steel.
CN201520633131.3U 2015-08-20 2015-08-20 Steady voltage formula low discharge wind speed amount of wind measuring device Active CN204831400U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106093464A (en) * 2016-07-27 2016-11-09 山东省科学院激光研究所 A kind of optical fiber differential pressure air velocity transducer and application
CN105588950B (en) * 2015-12-12 2019-04-23 中国航空工业集团公司西安飞机设计研究所 A kind of ultralow wind velocity measurement system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105588950B (en) * 2015-12-12 2019-04-23 中国航空工业集团公司西安飞机设计研究所 A kind of ultralow wind velocity measurement system
CN106093464A (en) * 2016-07-27 2016-11-09 山东省科学院激光研究所 A kind of optical fiber differential pressure air velocity transducer and application

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Address after: 211200 environmental protection industrial park, Lishui Economic Development Zone, Nanjing, Jiangsu

Patentee after: Nanjing Yi Hua environmental Polytron Technologies Inc

Address before: 211200 environmental protection industrial park, Lishui Economic Development Zone, Nanjing, Jiangsu

Patentee before: The Nanjing supporting company limited of the color environmental engineering of benefit