Air volume measuring device

Abstract

The utility model discloses an air volume measuring device, which comprises a device main body, a pore plate assembly is arranged in the device main body, the interior of the device main body is divided into an air receiving chamber and an air exhaust chamber by the pore plate assembly, one end of the device main body is connected with an air inlet pipeline, the air inlet pipeline is communicated with the air receiving chamber, and the air exhaust chamber is communicated with the air exhaust chamber. And the other end of the device main body is connected with an air outlet pipeline, and the air outlet pipeline is communicated with the air exhaust chamber. According to the air volume measuring device, the interior of the device body is divided into the air receiving chamber and the air exhaust chamber through the pore plate assembly, the air receiving chamber can play a role in buffering, the pore plate assembly can simulate air resistance and control the static pressure in the air receiving chamber so as to control the air volume, meanwhile, through holes in the pore plate assembly can enable airflow to be mixed evenly, and the air volume measuring accuracy is improved. And the uniformity of the airflow velocity of air outlet to the cross section is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind volume measurement, and in particular relates to a wind volume measurement device. Background Art

[0002] The existing air volume test device measures the state of air at the wind tunnel nozzle and calculates the air volume value of the sample under test according to the relevant formula. The equipment is complex and expensive. In addition to monitoring a large amount of data during the entire test process, the equipment is usually designed to be fixed and immovable, which is not convenient for acceptance testing or identification testing of samples at the installation site.

[0003] In the related art, for example, a flow-averaging combined venturi air volume measuring device disclosed in Chinese patent publication CN 106225857 A has a compact layout and is easy to install and use. However, the venturi tube in the related art is fixed and the air volume cannot be adjusted. Utility Model Content

[0004] The utility model aims to provide a wind volume measuring device, which is simple and low-cost.

[0005] To this end, the utility model provides a wind volume measuring device, including: a device body, an orifice plate assembly is arranged inside the device body, the orifice plate assembly divides the interior of the device body into a wind receiving chamber and an air exhaust chamber, one end of the device body is connected to an air inlet duct, the air inlet duct is communicated with the wind receiving chamber, and the other end of the device body is connected to an air outlet duct, the air outlet duct is communicated with the exhaust chamber.

[0006] Preferably, the orifice plate assembly includes a fixed orifice plate, a movable orifice plate and a power device, the fixed orifice plate is fixedly installed in the device body, the movable orifice plate is parallel to the fixed orifice plate, the power device is connected to the movable orifice plate, and the power device is used to drive the movable orifice plate to move up and down.

[0007] Further preferably, the power device is one of a linear motor, a cylinder, and a hydraulic cylinder.

[0008] Preferably, the fixed orifice plate is provided with first through holes evenly distributed in a matrix.

[0009] Preferably, the distance between two adjacent first through holes is greater than or equal to the diameter of the first through holes.

[0010] Preferably, the movable orifice plate is provided with second through holes evenly distributed in a matrix, the spacing between two adjacent second through holes is the same as the spacing between two adjacent first through holes, and the diameter of the second through holes is the same as the diameter of the first through holes.

[0011] Preferably, the contact surface between the fixed orifice plate and the movable orifice plate is coated with sealant.

[0012] Preferably, air pressure measuring points are arranged around the wind receiving chamber, and the air pressure measuring points are connected to a differential pressure gauge via a pipeline, and the differential pressure gauge is used to detect the static pressure in the wind receiving chamber.

[0013] Preferably, one air pressure measuring point is respectively provided on the upper surface, the lower surface and the two side surfaces of the wind receiving chamber.

[0014] Preferably, an anemometer is provided in the air outlet duct.

[0015] Preferably, an exhaust fan is provided in the air outlet duct.

[0016] Beneficial effects:

[0017] 1. The utility model provides an air volume measuring device, which divides the interior of the device body into an air receiving chamber and an air exhaust chamber through an orifice plate assembly. The air receiving chamber can play a buffering role, and the orifice plate assembly can simulate wind resistance, control the static pressure in the air receiving chamber and thus control the air volume. At the same time, the through holes on the orifice plate assembly can make the airflow evenly mixed, effectively improving the uniformity of the air flow velocity on the cross section of the air outlet.

[0018] 2. The orifice plate assembly in the utility model is provided with a fixed orifice plate and a movable orifice plate, the fixed orifice plate is provided with a first through hole, the movable orifice plate is provided with a second through hole, and the power device drives the movable orifice plate to move up and down to adjust the overlapping area of ​​the first through hole and the second through hole, thereby adjusting the air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a cross-sectional view of Example 1 of an air volume measuring device provided by the utility model.

[0021] Figure 2 This is an enlarged view of area A of Example 1 of an air volume measurement device provided by the utility model.

[0022] Figure 3 This is a schematic diagram of the fixed orifice plate structure of Example 1 of an air volume measuring device provided by the utility model.

[0023] Figure 4A schematic diagram of the structure of a movable orifice plate of Example 1 of an air volume measuring device provided by the utility model.

[0024] Figure 5 This is a schematic diagram of the air pressure measurement point structure of Example 1 of an air volume measurement device provided by the utility model.

[0025] In the figure, 1-device body, 11-wind receiving chamber, 12-exhaust chamber, 2-orifice plate assembly, 21-fixed orifice plate, 22-movable orifice plate, 23-power device, 25-first through hole, 26-second through hole, 3-air inlet duct, 4-air outlet duct, 5-anemometer, 6-exhaust fan, 7-air pressure measuring point, 8-differential pressure gauge, W1-distance between two adjacent first through holes, D1-diameter of the first through hole, L1-length of the fixed orifice plate, L2-width of the fixed orifice plate. DETAILED DESCRIPTION

[0026] The content of the present invention can be more easily understood by referring to the following detailed description of the preferred implementation method of the present invention and the included embodiments. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0027] Embodiment 1:

[0028] Provides such as Figure 1 The wind volume measuring device shown in the figure comprises: a device body 1, an orifice plate assembly 2 is arranged inside the device body 1, and the orifice plate assembly 2 divides the inside of the device body 1 into a wind receiving chamber 11 and an exhaust chamber 12, one end of the device body 1 is connected to an air inlet duct 3, and the air inlet duct 3 is connected to the wind receiving chamber 11, and the other end of the device body 1 is connected to an air outlet duct 4, and the air outlet duct 4 is connected to the exhaust chamber 12. An anemometer 5 is arranged in the air outlet duct 4. An exhaust fan 6 is arranged in the air outlet duct 4. In this embodiment, the length, width and height of the wind receiving chamber 11 are 3m×1.5m×3m, and the cross-sectional size of the air inlet duct 3 is 1m×1m.

[0029] like Figure 2 As shown, the orifice plate assembly 2 includes a fixed orifice plate 21, a movable orifice plate 22 and a power device 23. The fixed orifice plate 21 is fixedly installed in the device body 1, the movable orifice plate 22 is parallel to the fixed orifice plate 21, and the power device 23 is connected to the movable orifice plate 22. The power device 23 is used to drive the movable orifice plate 22 to move up and down. The contact surface between the fixed orifice plate 21 and the movable orifice plate 22 is coated with sealant. In this embodiment, the power device 23 is a linear motor.

[0030] like Figure 3As shown, the fixed hole plate 21 is provided with first through holes 25 uniformly distributed in a matrix, and the spacing W1 between two adjacent first through holes 25 is equal to the diameter D1 of the first through holes 25. In this embodiment, the length L1 of the fixed hole plate 21 is 3000 mm, the width L2 is 3000 mm, the spacing W1 between two adjacent first through holes 25 is 60 mm, and the diameter D1 of the first through hole 25 is 30 mm.

[0031] like Figure 4 As shown, the movable orifice plate 22 is provided with second through holes 26 uniformly distributed in a matrix, the spacing W2 between two adjacent second through holes 26 is the same as the spacing W1 between two adjacent first through holes 25, and the diameter D2 of the second through hole 26 is the same as the diameter D1 of the first through hole 25. In this embodiment, the length L3 of the movable orifice plate 22 is 3000mm, the width is 2970mm, the spacing W2 between two adjacent second through holes 26 is 60mm, and the diameter D2 of the second through hole 26 is 30mm. The movable orifice plate 22 moves up and down by a distance of 30mm.

[0032] like Figure 5 As shown, an air pressure measuring point 7 is provided on the upper surface, the lower surface and the two side surfaces of the wind receiving chamber 11, and the air pressure measuring point 7 is connected to one end of a differential pressure gauge 8 through a pipeline connection. The other end of the differential pressure gauge 8 detects the atmospheric pressure through an atmospheric measuring point 81. The differential pressure gauge 8 displays the static pressure value in the wind receiving chamber 11 through the pressure difference between the air pressure measuring point 7 and the atmospheric measuring point 81. By adjusting the movable orifice plate 22 to adjust the overlap between the first through hole 25 and the second through hole 26, the static pressure value of the differential pressure gauge 8 is passed through, thereby achieving the effect of simulating the adjustment of wind resistance and air volume.

[0033] Working principle: air enters the air receiving chamber 11 from the air inlet duct 3, passes through the orifice assembly 2 to buffer and evenly distribute the airflow, and enters the exhaust duct 4 from the exhaust chamber 12. The anemometer 5 detects the wind speed. The power device 23 drives the movable orifice plate 22 to move up and down to adjust the air volume. When the second through hole 26 on the movable orifice plate 22 completely overlaps with the first through hole 25 on the fixed orifice plate 21, the air volume is the largest.

Claims

1. A wind volume measuring device, characterized in that: include: The device body has an orifice plate assembly disposed inside the device body, and the orifice plate assembly divides the interior of the device body into a wind receiving chamber and an air exhaust chamber. One end of the device body is connected to an air inlet duct, and the air inlet duct is communicated with the wind receiving chamber. The other end of the device body is connected to an air outlet duct, and the air outlet duct is communicated with the exhaust chamber.

2. The wind volume measuring device according to claim 1, characterized in that: The orifice plate assembly includes a fixed orifice plate, a movable orifice plate and a power device, the fixed orifice plate is fixedly installed in the device body, the movable orifice plate is parallel to the fixed orifice plate, the power device is connected to the movable orifice plate, and the power device is used to drive the movable orifice plate to move up and down.

3. The wind volume measuring device according to claim 2, characterized in that: The fixed orifice plate is provided with first through holes uniformly distributed in a matrix.

4. The wind volume measuring device according to claim 3, characterized in that: The distance between two adjacent first through holes is greater than or equal to the diameter of the first through holes.

5. The wind volume measuring device according to claim 4, characterized in that: The movable orifice plate is provided with second through holes evenly distributed in a matrix, the distance between two adjacent second through holes is the same as the distance between two adjacent first through holes, and the diameter of the second through holes is the same as the diameter of the first through holes.

6. The wind volume measuring device according to claim 5, characterized in that: The contact surface between the fixed orifice plate and the movable orifice plate is coated with sealant.

7. The wind volume measuring device according to claim 1, characterized in that: Air pressure measuring points are arranged around the wind receiving chamber, and the air pressure measuring points are connected to a differential pressure gauge through a pipeline. The differential pressure gauge is used to detect the static pressure in the wind receiving chamber.

8. The wind volume measuring device according to claim 7, characterized in that: An air pressure measuring point is respectively arranged on the upper surface, the lower surface and the two side surfaces of the wind receiving chamber.

9. The wind volume measuring device according to claim 1, characterized in that: An anemometer is arranged in the air outlet duct.

10. The wind volume measuring device according to claim 1, characterized in that: An exhaust fan is arranged in the air outlet duct.

Images