CN217716510U - Venturi wind measuring device capable of improving measurement precision - Google Patents
Venturi wind measuring device capable of improving measurement precision Download PDFInfo
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- CN217716510U CN217716510U CN202221141187.3U CN202221141187U CN217716510U CN 217716510 U CN217716510 U CN 217716510U CN 202221141187 U CN202221141187 U CN 202221141187U CN 217716510 U CN217716510 U CN 217716510U
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Abstract
The utility model discloses an improve measurement accuracy's venturi anemometry device, including being used for horizontal malleation sample house steward and the negative pressure sample house steward that inserts in the wind channel, be provided with malleation sample amplification subassembly on the malleation sample house steward, be provided with negative pressure sample amplification subassembly on the negative pressure sample house steward, malleation sample amplification subassembly includes a pair of bent type pipeline, the centre of bent type pipeline get through the malleation press divide the pipe with malleation sample house steward is linked together, negative pressure sample amplification subassembly includes a pair of venturi, venturi's centre get through the negative pressure press divide the pipe with negative pressure sample house steward is linked together, just two tip drill way facings of bent type pipeline are just to the air current in the wind channel, venturi's large-port portion is just to the air current in the wind channel. The utility model provides the high detection precision of the amount of wind in the wind channel.
Description
Technical Field
The utility model relates to an amount of wind test technical field, concretely relates to improve measurement accuracy's venturi wind measuring device.
Background
The venturi tube is widely applied in the field of fluid measurement. The conventional venturi tube structure in the prior art comprises an inlet cylindrical section, a conical contraction section, a closing cylindrical section and a conical diffusion section which are sequentially and integrally connected according to the flowing direction of fluid. Fluid enters from the inlet end, is contracted by the conical contraction section, and flows out from the conical diffusion section after passing through the closing-up cylindrical section with the smallest caliber. A pair of pressure taking ports are respectively arranged on an inlet cylindrical section and a closing cylindrical section of the Venturi tube, a fluid pressure detection sensor (differential pressure transmitter) is arranged on each pressure taking port, the pressure difference of the pair of pressure taking ports can be measured, and then the flow value of the fluid is obtained through conversion according to the pressure difference.
The measurement accuracy of the venturi tube flowmeter is affected by factors such as high temperature, high pressure and fluid stability of the fluid. In particular, in the case of a large flow channel, when the flow velocity of the fluid in the flow channel is not uniform, the accuracy of flow rate detection is significantly reduced.
Therefore, it is necessary to improve the existing venturi tube flow measurement method to achieve high-precision measurement of fluid in a large flow passage.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an improve measurement accuracy's venturi anemometry device aims at improving the detection precision of the interior amount of wind channel. The specific technical scheme is as follows:
the utility model provides an improve measurement accuracy's venturi anemometry device, is including being used for transversely inserting malleation sample house steward and negative pressure sample house steward in the wind channel, be provided with malleation sample amplification subassembly on the malleation sample house steward, be provided with negative pressure sample amplification subassembly on the negative pressure sample house steward, malleation sample amplification subassembly includes a pair of bending type pipeline, the centre of bending type pipeline through the malleation get the pressure divide the pipe with malleation sample house steward is linked together, negative pressure sample amplification subassembly includes a pair of venturi, venturi in the centre get the pressure through the negative pressure divide the pipe with negative pressure sample house steward is linked together, just two tip drill way facings of bending type pipeline are just to the air current in the wind channel, venturi's large port portion is just to the air current in the wind channel.
Preferably, malleation sampling house steward and negative pressure sampling house steward's one end is connected with a flange jointly, malleation sampling house steward and negative pressure sampling house steward's the other end is connected with a supporting disk jointly dorsad on the supporting disk malleation sampling house steward and negative pressure sampling house steward's one side is provided with the location cylinder.
Preferably, one side in wind channel is provided with the flange mounting seat, the opposite side in wind channel is provided with the supporting seat, malleation sampling house steward and negative pressure sampling house steward's one end is passed through the flange is fixed on the flange mounting seat, malleation sampling house steward and negative pressure sampling house steward's the other end passes through the location cylinder is installed in the locating hole of supporting seat.
Preferably, the bent pipeline is an arc pipeline or a V-shaped pipeline.
As a further improvement of the present invention, two end orifices of the bent pipeline are arranged in the vertical direction.
Two end openings of the bent pipeline are arranged according to the upper position and the lower position, when the air flow in the air duct has impurities, the impurities in the air flow can fall downwards from the bent pipeline under the action of gravity, and therefore the blockage of the bent pipeline can be avoided. Therefore, the reliability of the operation of the positive pressure sampling amplification component is improved.
The utility model discloses in, venturi is along being on a parallel with the axial in wind channel is arranged.
The utility model discloses in lean on the malleation sampling house steward the one end of flange is provided with the malleation and enlargies the air current fairlead lean on the negative pressure sampling house steward the one end of flange is provided with the negative pressure and enlargies the air current fairlead.
The utility model discloses in, wind pressure detection sensor is connected respectively to malleation amplification air current fairlead, the negative pressure amplification air current fairlead.
In order to further improve the accuracy of detecting the air quantity in the air duct, the further improvement scheme is as follows: malleation sampling house steward and negative pressure sampling house steward symmetrical arrangement respectively are in the intermediate position in wind channel, two pairs of tip drill way symmetrical branches of a pair of bent type pipeline are arranged in malleation sampling house steward's both sides, a pair of venturi symmetrical branch is arranged in negative pressure sampling house steward's both sides.
Preferentially, the quantity of the positive pressure sampling and amplifying components is two groups and is relative to the central symmetrical arrangement of the air channel, and the quantity of the negative pressure sampling and amplifying components is two groups and is relative to the central symmetrical arrangement of the air channel.
As the utility model discloses a further improve, the utility model discloses an improve measurement accuracy's venturi anemometry device still is provided with third group malleation sampling amplification subassembly and third group negative pressure sampling amplification subassembly, just third group malleation sampling amplification subassembly is arranged last leaning on of malleation sampling manifold the central point in wind channel puts, third group negative pressure sampling amplification subassembly is arranged last leaning on of negative pressure sampling manifold the central point in wind channel puts.
A method for measuring the air quantity of a Venturi air measuring device with improved measurement precision comprises the following steps:
(1) Installation: installing a Venturi wind measuring device into the air duct;
(2) Positive pressure amplification detection: airflow in the air duct flows forwards along the axial direction of the air duct, flowing airflow enters two end inlets of an upward bending type pipeline of the positive pressure sampling amplification assembly, enters a positive pressure sampling main pipe through a positive pressure tapping branch pipe, is led out to a wind pressure detection sensor through a positive pressure amplification airflow outlet pipe, and the detection value of the wind pressure detection sensor is amplified through the impact effect generated by the led-out flowing airflow, so that positive pressure amplification detection of the airflow is realized.
(3) Negative pressure amplification detection: the air current in wind channel 1 flows forward along the axial in wind channel 1, and pass through from the axial in the venturi, when the air current got into venturi, bottleneck department's velocity of flow increased in the middle of the venturi, pressure drop, thereby get the negative pressure at the venturi middle part and press the branch pipe to produce negative pressure suction effect, this kind of negative pressure suction effect is conducted to negative pressure amplification air current eduction tube through negative pressure sampling house steward on, thereby make the wind pressure detection sensor who connects negative pressure amplification air current eduction tube detect the negative pressure, the negative pressure amplification that has realized the air current from this detects.
(4) Dynamic monitoring of air volume in a flow channel: and obtaining an amplified pressure difference according to the amplified positive pressure detected by the positive pressure sampling and amplifying assembly and the negative pressure detected by the negative pressure sampling and amplifying assembly, and calculating the actual air volume in the air outlet channel according to the amplified pressure difference.
The utility model has the advantages that:
first, the utility model discloses an improve measurement accuracy's venturi anemometry device is provided with malleation sampling and amplification subassembly and negative pressure sampling and amplification subassembly, can form enlarged malleation and negative pressure, has improved the interior wind volume detection's of runner precision and sensitivity from this.
Second, the utility model discloses an improve measurement accuracy's venturi anemometry device, malleation sample amplification subassembly and negative pressure sample amplification subassembly have realized the multiple spot sample respectively, and through the automatic average value that differs sampling pressure of multiple spot sample, the amount of wind detection precision when improving air current pressure inhomogeneous in the wind channel from this.
Third, the utility model discloses an improve measurement accuracy's venturi anemometry device arranges according to upper and lower position through two tip drill ways with bent type pipeline, and when the air current in the wind channel had impurity, impurity in the air current can drop downwards from bent type pipeline under the effect of gravity to can avoid the jam of bent type pipeline. Therefore, the reliability of the operation of the positive pressure sampling amplification component is improved.
Drawings
Fig. 1 is a schematic structural diagram of a venturi anemometer device for improving measurement accuracy of the present invention;
FIG. 2 is a left side view of FIG. 1;
figure 3 is a schematic diagram of the venturi structure.
In the figure: 1. the air duct, 2, malleation sampling house steward, 3, negative pressure sampling house steward, 4, malleation sampling amplification subassembly, 5, negative pressure sampling amplification subassembly, 6, bent type pipeline, 7, malleation are got the pressure and are divided the pipe, 8, venturi, 9, negative pressure are got the pressure and are divided the pipe, 10, flange, 11, supporting disk, 12, location cylinder, 13, flange mount, 14, supporting seat, 15, locating hole, 16, malleation amplification air current eduction tube, 17, negative pressure amplification air current eduction tube.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1:
as shown in fig. 1 to 3 be the utility model discloses an improve measurement accuracy's venturi anemometry device's embodiment, including being used for transversely inserting malleation sampling manifold 2 and negative pressure sampling manifold 3 in wind channel 1, be provided with malleation sampling amplification subassembly 4 on the malleation sampling manifold 2, be provided with negative pressure sampling amplification subassembly 5 on the negative pressure sampling manifold 3, malleation sampling amplification subassembly 4 includes a pair of bent type pipeline 6, the centre of bent type pipeline 6 is got through the malleation and is pressed the branch pipe 7 with malleation sampling manifold 2 is linked together, negative pressure sampling amplification subassembly 5 includes a pair of venturi 8, venturi 8's centre is got through the negative pressure and is pressed the branch pipe 9 with negative pressure sampling manifold 3 is linked together, just two tip drill way facings of bent type pipeline 6 are just to the air current in wind channel 1, venturi 8's big port facing is just to the air current in wind channel 1.
Preferably, the one end of malleation sampling manifold 2 and negative pressure sampling manifold 3 is connected with a flange 10 jointly, malleation sampling manifold 2 and negative pressure sampling manifold 3's the other end is connected with a supporting disk 11 jointly support disk 11 is dorsad the one side of malleation sampling manifold 2 and negative pressure sampling manifold 3 is provided with location cylinder 12.
Preferably, one side in wind channel 1 is provided with flange mount 13, the opposite side in wind channel 1 is provided with supporting seat 14, malleation sampling manifold 2 and negative pressure sampling manifold 3's one end is passed through flange 10 is fixed on flange mount 13, malleation sampling manifold 2 and negative pressure sampling manifold 3's the other end passes through location cylinder 12 is installed in the locating hole 15 of supporting seat 14.
Preferably, the curved pipeline 6 is a circular arc pipeline or a V-shaped pipeline.
As a further modification of the present embodiment, the two end ports of the bent pipe 6 are arranged in the up-down position.
Through the arrangement of the two end orifices of the bent pipeline 6 according to the upper and lower positions, when the air flow in the air duct 1 has impurities, the impurities in the air flow can drop downwards from the bent pipeline 6 under the action of gravity, so that the blockage of the bent pipeline 6 can be avoided. Thereby improving the reliability of operation of the positive pressure sampling amplifying assembly 4.
In this embodiment, the venturi tube 8 is arranged in parallel with the axial direction of the air duct 1.
In this embodiment, a positive pressure amplified airflow outlet pipe 16 is provided at one end of the positive pressure sampling header pipe 2 close to the flange 10, and a negative pressure amplified airflow outlet pipe 17 is provided at one end of the negative pressure sampling header pipe 3 close to the flange 10.
In this embodiment, the positive pressure amplification airflow eduction tube 16 and the negative pressure amplification airflow eduction tube 17 are respectively connected to a wind pressure detection sensor (not shown in the figure).
In order to further improve the accuracy of the air volume detection in the air duct 1, the further improvement scheme is as follows: malleation sampling manifold 2 and negative pressure sampling manifold 3 are symmetrical arrangement respectively are in the intermediate position in wind channel 1, two pairs of tip drill way symmetries of a pair of bent type pipeline 6 are arranged in malleation sampling manifold 2's both sides, 8 symmetries of a pair of venturi are arranged in negative pressure sampling manifold 3's both sides.
Preferentially, the number of the positive pressure sampling and amplifying assemblies 4 is two groups and is relative to the central symmetrical arrangement of the air duct 1, and the number of the negative pressure sampling and amplifying assemblies 5 is two groups and is relative to the central symmetrical arrangement of the air duct 1.
As a further improvement of this embodiment, the venturi anemometry device for improving the measurement accuracy of this embodiment is further provided with a third positive pressure sampling and amplifying component and a third negative pressure sampling and amplifying component (not shown in the figure), and the third positive pressure sampling and amplifying component is arranged on the positive pressure sampling main pipe 2 and close to the central position of the air duct 1, and the third negative pressure sampling and amplifying component is arranged on the negative pressure sampling main pipe 3 and close to the central position of the air duct 1.
Example 2:
a method for measuring the air quantity of a Venturi air measuring device with improved measurement precision comprises the following steps:
(1) Installation: installing a Venturi wind measuring device into the air duct 1;
(2) Positive pressure amplification detection: airflow in the air duct 1 flows forwards along the axial direction of the air duct 1, flowing airflow enters two end inlets of an upward-bending pipeline 6 of the positive pressure sampling amplification component 4, and enters the positive pressure sampling main pipe 2 through the positive pressure tapping pipe 7, then is led out to the air pressure detection sensor through the positive pressure amplification airflow outlet pipe 16, the detection value of the air pressure detection sensor is amplified through the impact effect generated by the led-out flowing airflow, and therefore positive pressure amplification detection of the airflow is achieved.
(3) Negative pressure amplification detection: the air current in wind channel 1 flows forward along the axial of wind channel 1, and pass through from the axial in venturi 8, when the air current gets into venturi 8, bottleneck department's velocity of flow increases in the middle of venturi 8, pressure drop, thereby produce the negative pressure suction effect to the negative pressure of connecting at venturi 8 middle part and divide pipe 9, this kind of negative pressure suction effect is conducted to negative pressure amplification air current eduction tube 17 on through negative pressure sampling house steward 3, thereby make the wind pressure detection sensor who connects negative pressure amplification air current eduction tube 17 detect the negative pressure, the negative pressure amplification that has realized the air current from this detects.
(4) Dynamic monitoring of air volume in a flow channel: obtaining an amplified pressure difference according to the amplified positive pressure detected by the positive pressure sampling and amplifying assembly 4 and the negative pressure detected by the negative pressure sampling and amplifying assembly 5, and calculating the actual air volume in the air outlet channel according to the amplified pressure difference.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and embellishments can be made without departing from the technical principle of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides an improve measurement accuracy's venturi anemometry device, its characterized in that, is including being used for horizontal malleation sample house steward and the negative pressure sample house steward that inserts in the wind channel, be provided with the malleation sample on the malleation sample house steward and enlarge the subassembly, be provided with the negative pressure sample on the negative pressure sample house steward and enlarge the subassembly, the malleation sample is enlarged the subassembly and is included a pair of bent type pipeline, the centre on bent type pipeline get through the malleation get press the minute pipe with malleation sample house steward is linked together, the negative pressure sample is enlarged the subassembly and is included a pair of venturi, venturi's centre get press the minute pipe through the negative pressure with the negative pressure sample house steward is linked together, just two tip drill way head-on of bent type pipeline are just to the air current in the wind channel, venturi's large port portion head-on is just to the air current in the wind channel.
2. The venturi wind measuring device for improving the measurement accuracy according to claim 1, wherein one end of the positive pressure sampling header pipe and one end of the negative pressure sampling header pipe are connected with a flange, the other end of the positive pressure sampling header pipe and the other end of the negative pressure sampling header pipe are connected with a supporting disc, and a positioning cylinder is arranged on the supporting disc, facing away from the positive pressure sampling header pipe and the negative pressure sampling header pipe.
3. The venturi wind measuring device according to claim 2, wherein a flange mounting seat is disposed on one side of the air duct, a supporting seat is disposed on the other side of the air duct, one end of the positive pressure sampling main pipe and one end of the negative pressure sampling main pipe are fixed on the flange mounting seat through the flange, and the other end of the positive pressure sampling main pipe and the other end of the negative pressure sampling main pipe are mounted in the positioning hole of the supporting seat through the positioning cylinder.
4. A venturi anemometry device with improved measurement accuracy according to claim 1, wherein the two end ports of the bent pipe are arranged in an up-down position.
5. The venturi anemometry device for improving the measurement accuracy according to claim 1, wherein the venturi tubes are arranged in parallel with an axial direction of the wind tunnel.
6. The venturi anemometry device with improved measurement accuracy according to claim 2, wherein a positive pressure amplified airflow outlet pipe is provided at an end of the positive pressure sampling header pipe close to the flange, and a negative pressure amplified airflow outlet pipe is provided at an end of the negative pressure sampling header pipe close to the flange; the positive pressure amplification airflow eduction tube and the negative pressure amplification airflow eduction tube are respectively connected with a wind pressure detection sensor.
7. The venturi anemometry device for improving the measurement accuracy according to claim 6, wherein the positive pressure sampling header pipe and the negative pressure sampling header pipe are respectively and symmetrically arranged at the middle position of the air duct, two pairs of end openings of the pair of bent pipelines are symmetrically arranged at two sides of the positive pressure sampling header pipe, and the pair of venturi pipes are symmetrically arranged at two sides of the negative pressure sampling header pipe.
8. The venturi anemometry device for improving the measurement accuracy according to claim 1, wherein the positive pressure sampling amplification assemblies are two in number and symmetrically arranged with respect to the center of the air duct, and the negative pressure sampling amplification assemblies are two in number and symmetrically arranged with respect to the center of the air duct.
9. The venturi anemometry device for improving the measurement accuracy according to claim 8, further comprising a third positive pressure sampling and amplifying assembly and a third negative pressure sampling and amplifying assembly, wherein the third positive pressure sampling and amplifying assembly is disposed at a center position on the positive pressure sampling main pipe close to the air duct, and the third negative pressure sampling and amplifying assembly is disposed at a center position on the negative pressure sampling main pipe close to the air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221141187.3U CN217716510U (en) | 2022-05-13 | 2022-05-13 | Venturi wind measuring device capable of improving measurement precision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221141187.3U CN217716510U (en) | 2022-05-13 | 2022-05-13 | Venturi wind measuring device capable of improving measurement precision |
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| Publication Number | Publication Date |
|---|---|
| CN217716510U true CN217716510U (en) | 2022-11-01 |
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| CN202221141187.3U Active CN217716510U (en) | 2022-05-13 | 2022-05-13 | Venturi wind measuring device capable of improving measurement precision |
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| CN (1) | CN217716510U (en) |
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- 2022-05-13 CN CN202221141187.3U patent/CN217716510U/en active Active
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