CN217007385U

CN217007385U - Anemograph calibrating device

Info

Publication number: CN217007385U
Application number: CN202220489089.2U
Authority: CN
Inventors: 黄身辉; 吴盛江; 林灏
Original assignee: Anzheng Measurement And Testing Co ltd
Current assignee: Anzheng Measurement And Testing Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-19
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to the technical field of anemograph calibration, in particular to an anemograph calibration device which comprises a wind tunnel, wherein the wind tunnel is sequentially provided with a stable section, a contraction section and a test section for fixing a probe of an anemograph to be calibrated along the air inlet-air outlet direction, the contraction section is provided with a fairing, two ends of the fairing are respectively connected with the side wall of the stable section and the side wall of the test section, a ventilation cavity is arranged in the fairing, and the ventilation cavity is of an inverted horn mouth structure along the air inlet-air outlet direction. Through the shrink section sets up the radome fairing, just the ventilation chamber of radome fairing is followed air inlet is anti-horn mouth structure to the air-out direction, through the radome fairing with the air inlet rectification to can guarantee that the air inlet in the test section is concentrated, thereby reduce the inside natural wind interference of wind-tunnel, and then improve the calibration precision.

Description

Anemograph calibrating device

Technical Field

The utility model relates to the technical field of anemometer calibration, in particular to an anemometer calibration device.

Background

The anemoscope is an instrument for measuring the air flow rate, is widely applied to industries such as electric power, steel, petrifaction, energy conservation, agriculture, meteorology and the like. In order to ensure the accuracy of the anemoruminal data detected by the anemometer, the anemometer needs to be calibrated regularly. The calibration device for calibrating the anemoscope is a wind tunnel, the wind tunnel is provided with a cavity and fan equipment for air inlet of the cavity, and the wind tunnel is large in size and large in space design of the cavity of the wind tunnel for reducing wall surface interference inside the cavity due to the fact that the anemoscope is various and the fan equipment adopted for ensuring that the wind tunnel meets the requirement of large wind volume is large. However, the anemometer probe is small in size and the space of the cavity is too large, so that the anemometer probe is easily influenced by natural wind in the cavity during calibration, and particularly in a low-speed wind detection state, the natural wind has a large influence on a detection result and easily influences the calibration accuracy.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an anemometer calibration device capable of improving calibration accuracy.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides an anemoscope calibrating device, includes the wind-tunnel, the wind-tunnel is equipped with stationary section, shrink section and is used for the fixed test section of treating calibration anemoscope probe along air inlet to air-out direction in proper order, the shrink section be equipped with both ends respectively with the radome fairing that the lateral wall of stationary section and the lateral wall of test section are connected, the inside chamber that ventilates that is equipped with of radome fairing, the chamber that ventilates is followed air inlet is anti-horn mouth structure to air-out direction.

Furthermore, a first honeycomb device is arranged in an opening of one end, close to the test section, of the ventilation cavity of the fairing.

Further, first honeycomb ware sets up the ventilation chamber is close to the open-ended central point of the one end of test section puts, the ventilation chamber of radome fairing is close to still be equipped with on the open-ended lateral wall of the one end of test section and encircle the ventilation net that first honeycomb ware set up, be equipped with a plurality of wind channels that face respectively that the slope of first honeycomb ware center set up on the ventilation net.

Furthermore, two fixing clamps are arranged in the test section, and clamping positions of the two fixing clamps are respectively coaxially arranged with the center of the first honeycomb device.

Further, still include with the stationary segment is close to the gas collection section that the one end of air inlet is connected, be equipped with in the gas collection section along air-out to the air inlet direction air-collecting port that the opening gradually enlarges.

Further, a second honeycomb device is arranged between the gas collection section and the stable section.

The utility model has the beneficial effects that: the utility model provides an anemograph calibrating device, through the shrink section sets up the radome fairing, just the ventilation chamber of radome fairing is followed air inlet is anti-horn mouth structure to the air-out direction, and the fairing is with the air inlet rectification to can guarantee that the air inlet in the test section is concentrated, thereby reduce the inside natural wind interference of wind-tunnel, and then improve the calibration precision.

Drawings

FIG. 1 is a schematic cross-sectional view of an anemometer calibration apparatus according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

description of reference numerals:

1. a frame; 2. a wind tunnel; 21. a gas collection section; 211. a second honeycomb device; 22. a stationary section; 23. a contraction section; 231. a first honeycomb device; 232. a ventilation net; 24. a test section; 25. a power section; 26. a diffuser section; 27. and an exhaust section.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 2, the wind tunnel provided by the utility model comprises a wind tunnel, wherein a stationary section, a contraction section and a test section for fixing a probe of a wind velocity indicator to be calibrated are sequentially arranged in the wind tunnel along the direction from the air inlet to the air outlet, the contraction section is provided with a fairing, two ends of the fairing are respectively connected with the side wall of the stationary section and the side wall of the test section, a ventilation cavity is arranged in the fairing, and the ventilation cavity is of an inverted horn mouth structure along the direction from the air inlet to the air outlet.

From the above description, the beneficial effects of the present invention are: the utility model provides an anemograph calibrating device, through the shrink section sets up the radome fairing, just the ventilation chamber of radome fairing is followed air inlet is anti-horn mouth structure to the air-out direction, and the fairing is with the air inlet rectification to can guarantee that the air inlet in the test section is concentrated, thereby reduce the inside natural wind interference of wind-tunnel, and then improve the calibration precision.

From the above description, the wind direction is rectified by the first honeycomb device at one end of the ventilation cavity of the fairing, which is close to the test section, so that the side interference of the natural wind is reduced.

Furthermore, first honeycomb ware sets up the ventilation chamber is close to the open-ended central point of the one end of test section puts, the ventilation chamber of radome fairing is close to still be equipped with on the open-ended lateral wall of the one end of test section and encircle the ventilation net that first honeycomb ware set up, be equipped with a plurality of court respectively on the ventilation net the wind channel that first honeycomb ware center slope set up.

From the above description, it can be known that the plurality of air ducts obliquely arranged toward the center of the first honeycomb device respectively, which are arranged on the ventilation net, can further realize air volume concentration, reduce air volume diffusion, and thus improve the accuracy of wind speed detection.

According to the above description, the clamping positions of the two fixing clamps are respectively coaxial with the center of the first honeycomb device, so that the probe of the anemograph to be calibrated is ensured to be positioned on the central shaft of the first honeycomb device, the probe is centralized by wind, and the interference of outside natural wind is minimum.

From the above description, the air collecting opening is opened along the direction from the air outlet to the air inlet to gradually discharge the air into the air inlet.

As can be seen from the above description, the second honeycomb device rectifies the inlet air direction to ensure the stability of the inlet air.

Application scenarios:

the anemoscope calibrating device provided by the utility model is applied to a calibration room or a laboratory, and is mainly used for calibrating anemoscope equipment.

Referring to fig. 1 to fig. 2, a first embodiment of the present invention is: the wind tunnel is sequentially provided with a gas collection section 21, a stable section 22, a contraction section 23, a test section 24 for fixing a probe of the anemoscope to be calibrated, a power section 25, a diffusion section 26 and an exhaust section 27 along the direction from air inlet to air outlet. The air collecting section is internally provided with an air collecting port with a gradually enlarged opening along the direction from air outlet to air inlet, the maximum caliber of the air collecting port is 40cm, and preferably, the air collecting section is in a rectangular pyramid structure. And a second honeycomb device 211 is arranged at the joint between the gas collection section and the stable section.

The contraction section is provided with a fairing, two ends of the fairing are respectively connected with the side wall of the stable section and the side wall of the test section, and two ends of the fairing are respectively fixedly connected with the side wall of the stable section and the side wall of the test section through sealing flanges. The inside ventilation chamber that is equipped with respectively with cavity intercommunication in stationary section and the test section of radome fairing, the chamber of ventilating is followed air inlet is anti-horn mouth structure to the air-out direction. Specifically, the maximum opening diameter of the anti-bell mouth structure that the ventilation chamber corresponds is 36cm, and the minimum opening diameter of the anti-bell mouth structure that the ventilation chamber corresponds is 24 cm. The ventilation chamber of radome fairing is close to be equipped with first honeycomb ware 231 and ventilation net 232 in the opening of the one end of test section, first honeycomb ware sets up the ventilation chamber is close to the open-ended central point of the one end of test section puts, ventilation net have the ring around first honeycomb ware sets up just ventilation net's internal perisporium with the periphery wall welded fastening of first honeycomb ware, ventilation net's periphery wall with the inside wall welded fastening of radome fairing. And a plurality of air channels which are obliquely arranged towards the center of the first honeycomb device are arranged on the ventilation net.

In this embodiment, the length of the test section is 85cm, and an openable sealing door is arranged on the outer side wall of the test section. And two fixing clamps are arranged in the test section and are respectively used for clamping the wind speed calibrator to be tested and the standard anemoscope. And the clamping positions of the two fixing clamps are respectively coaxially arranged with the center of the first honeycomb device.

In this embodiment, a centrifugal blower is arranged in the power section, and an air inlet of the centrifugal blower is connected with an outlet of the test section. And the air outlet of the centrifugal blower is connected with the inlet of the diffusion section. The diameter of the cavity inside the diffusion section is gradually increased along the direction from air inlet to air outlet.

In the embodiment, the maximum wind speed of the inlet wind in the test section is 40m/s, and the minimum wind speed is 1 m/s.

In this embodiment, still include control system, control system with centrifugal blower, the wind speed calibrator that awaits measuring and standard anemoscope electricity are connected, control system can be used for adjusting centrifugal blower's amount of wind and wind speed and receive the testing data of the wind speed calibrator that awaits measuring and standard anemoscope.

The working principle is as follows:

after a test section sealing door is opened, a probe of the wind speed calibrator to be tested and a probe of the standard anemoscope extend into the test section and are sequentially fixed on a fixing clamp, then required wind volume and wind speed are input into a control system, and after a centrifugal blower is started, detection data of the wind speed calibrator to be tested and the standard anemoscope are acquired after the centrifugal blower stably operates for a period of time.

In summary, according to the anemometer calibration device provided by the utility model, the fairing is arranged on the contraction section, the ventilation cavity of the fairing is in the inverted bell mouth structure along the direction from the air inlet to the air outlet, and the inlet air is rectified by the fairing, so that the concentration of the inlet air in the test section can be ensured, the natural wind interference in the wind tunnel is reduced, and the calibration accuracy is improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an anemoscope calibrating device, includes the wind-tunnel, the wind-tunnel is equipped with stationary section, shrink section and is used for the fixed test section of treating calibration anemoscope probe along air inlet to air-out direction in proper order, its characterized in that, the shrink section be equipped with both ends respectively with the radome fairing that the lateral wall of stationary section and the lateral wall of test section are connected, the inside chamber that ventilates that is equipped with of radome fairing, the chamber that ventilates is followed air inlet is anti-horn mouth structure to air-out direction.

2. The anemometer calibration apparatus of claim 1 wherein the opening of the cowling vent chamber adjacent the end of the test section has a first honeycomb structure disposed therein.

3. The anemometer calibration device according to claim 2, wherein the first honeycomb structure is disposed at a central position of the opening of the ventilation chamber near one end of the test section, a ventilation net surrounding the first honeycomb structure is further disposed on a side wall of the opening of the ventilation chamber near one end of the test section, and a plurality of air ducts are disposed on the ventilation net and inclined toward a center of the first honeycomb structure.

4. The anemometer calibration device according to claim 2, wherein two fixing clamps are disposed in the test section, and clamping positions of the two fixing clamps are respectively disposed coaxially with a center of the first honeycomb device.

5. The calibration device of claim 1, further comprising a gas collection section connected to an end of the stationary section near the inlet air, wherein the gas collection section is provided with a gas collection opening gradually enlarged from the outlet air to the inlet air.

6. An anemometer calibration device according to claim 5 wherein a second honeycomb structure is provided between the plenum section and the stationary section.