CN206440738U - A kind of Pitot tube fixing device that wind speed is surveyed for wind load test - Google Patents

Abstract

The utility model discloses a pitot tube fixing device used for wind resistance test and wind speed measurement, which comprises a platform and two fixing brackets erected on the platform with identical structures, and the two fixing brackets are placed in a trapezoidal shape; the fixing brackets There is a pulley on the top of the fixed bracket; the lower part of the horizontal section of the fixed bracket is provided with a positioning track, and a lifting frame is provided on the positioning track, and a positioning hole is opened on the lifting frame. The pitot tube passes through the positioning hole and is embedded between the two pulleys. between. The utility model has the advantages of simple device, convenient operation, low cost, convenient fixing and disassembly, and the height of the pitot tube can be adjusted. The device can be used to fix the pitot tube in the wind tunnel laboratory to measure wind speed, and the device can also be used to fix the pitot tube in the outdoor wind resistance test. Pitot tube to measure wind speed.

Description

A pitot tube fixing device for wind speed measurement in wind resistance test

technical field

The utility model relates to the field of structural wind resistance test equipment, in particular to a pitot tube fixing device used for wind resistance test to measure wind speed.

Background technique

In the study of structural wind resistance, it is often necessary to use pitot tubes to measure fluid velocity, and the pitot tubes usually need to be fixed at a certain position. If you rely on your hands to fix the pitot tube, it is easy to cause the pitot tube to shake slightly up and down or move left and right, resulting in large errors in the measurement results. Using the welding method to weld the pitot tube at a fixed position will cause problems such as the pitot tube cannot be moved, and the height of the pitot tube cannot be adjusted. In order to improve the speed measurement accuracy of the pitot tube, it is necessary to propose a method that can fix the pitot tube firmly and can change height device.

Utility model content

The purpose of the utility model is to provide a pitot tube fixing device for wind speed test.

The technical solution adopted by the utility model is: a pitot tube fixing device for wind speed test in wind resistance test, including a platform and two fixed brackets with the same structure erected on the platform, and the two fixed brackets are placed in a trapezoidal shape; The top of the fixed bracket is provided with a pulley; the lower part of the horizontal section of the fixed bracket is provided with a positioning track, and a lifting frame is arranged on the positioning track, and a positioning hole is opened on the lifting frame, and the pitot tube passes through the positioning hole and is embedded in the positioning track. between the two pulleys.

Further, the platform is rectangular, and four fixing holes are arranged on the platform, through which the platform can be fixed.

Further, the bottom of the fixed bracket is connected to the platform through bolts, and the pulley is provided with a brake handle.

Further, the positioning track is rectangular, and there are scale marks on the positioning track to accurately read the different heights of the pitot tubes. The ends of the two positioning tracks are provided with baffles to prevent the lifting frame from falling off from the positioning track.

Further, the lifting frame is rectangular, and a ring of expansion material is provided around the positioning hole on the lifting frame; the diameter of the positioning hole is slightly larger than the diameter of the Pitot tube, so that the expansion material can embed the Pitot tube tightly.

Further, the pitot tube is an L-type standard pitot tube, and the size of the pitot tube is determined according to the requirements of use. When the lifting frame is at the position of the baffle plate, the pitot tube should be higher than the lifting frame by a certain distance, so as to prevent the fixed bracket from measuring the wind speed of the pitot tube. interfere.

Beneficial effects produced by the utility model: the utility model has the advantages of simple device, convenient operation, low cost, convenient fixation and disassembly, and the height of the pitot tube can be adjusted. The device is used to fix the pitot tube to measure the wind speed in the outdoor wind resistance test.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view of the utility model;

Fig. 3 is a partial enlarged view of place A in Fig. 1;

Fig. 4 is a partial enlarged view of place B in Fig. 1;

Fig. 5 is a structural schematic diagram of the lifting frame.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model is a Pitot tube fixing device for wind speed measurement in a wind resistance test, comprising two fixed brackets 1 with the same structure, the two fixed brackets 1 are relatively placed in a trapezoidal shape, and the bottom of the fixed bracket 1 It is fixed on the rectangular platform 2 by bolts 6 , a horizontal section is arranged on the top of the fixed support 1 , and a pulley 7 is arranged at the end of the horizontal section.

As shown in FIG. 2 , a positioning track 8 is provided on the horizontal section of the fixed support 1 , and the lifting frame 14 can move vertically on the positioning track 8 relative to the platform 2 . The positioning track 8 is provided with a scale line 4 , and the adjusted height of the pitot tube 3 is determined by the scale line 4 on the positioning track 8 . Four corners of the platform 2 are provided with fixing holes 5 through which the platform 2 can be fixed.

As shown in Fig. 3, it is a partial enlarged view of A in Fig. 1 . The end of the positioning track 8 is provided with a baffle 10 to prevent the lifting frame 14 from coming out when it moves to the end of the positioning track 8 . A positioning hole 9 is provided in the middle of the lifting frame 14, and the Pitot tube 3 passes through the positioning hole 9.

As shown in Fig. 4, it is a partial enlarged view of B in Fig. 1 . Pitot tube 3 is embedded between two pulleys 11 . A brake handle 12 is provided on the pulley 11. After adjusting the height of the pitot tube 3, the brake handle 12 is inserted into the gear of the pulley at the same time, so that the pulley is fixed, so that the pitot tube 3 is fixed at a certain height. And simultaneously lifting frame 14 also can stay in a certain position, can not slide down.

As shown in FIG. 5 , an expansion material 13 is provided on the positioning hole 9 of the rectangular elevating frame 14 , and the expansion material 13 is arranged around the positioning hole 9 . The diameter of the positioning hole 3 is larger than that of the Pitot tube 9, so that the expansion material 13 can embed the Pitot tube 9 tightly.

The pitot tube used in the utility model is an L-type standard pitot tube, and the size of the pitot tube is determined according to the use requirements. Managed speed measurement interferes.

The utility model has the advantages of simple device, convenient operation, low cost, convenient fixing and disassembly, and the height of the pitot tube can be adjusted. The device can be used to fix the pitot tube in the wind tunnel laboratory to measure wind speed, and the device can also be used to fix the pitot tube in the outdoor wind resistance test. Pitot tube to measure wind speed.

The above descriptions are only the preferred embodiments of the present utility model, and various transformations made by those skilled in the art starting from the above ideas without creative work all fall within the scope of protection of the present utility model.

Claims (6)

1. A Pitot tube fixing device for measuring wind speed in wind resistance test, characterized in that: it comprises a platform and two completely identical fixing brackets erected on the platform, and the two fixing brackets are placed in a trapezoidal shape; The top of the bracket is provided with a pulley; the lower part of the horizontal section of the fixed bracket is provided with a positioning track, and a lifting frame is provided on the positioning track, and a positioning hole is opened on the lifting frame, and the pitot tube passes through the positioning hole and is embedded in two pulleys between. 2. A kind of Pitot tube fixing device for measuring wind speed in wind resistance test according to claim 1, characterized in that: the platform is rectangular, and the platform is provided with 4 fixing holes, through which the platform can be fixed. 3. A pitot tube fixing device for measuring wind speed in wind resistance test according to claim 1, characterized in that: the bottom of the fixing bracket is connected to the platform by bolts, and the pulley is provided with a brake handle. 4. A Pitot tube fixing device for measuring wind speed in wind resistance test according to claim 1, characterized in that: the positioning track is rectangular, and the positioning track is provided with a scale line for accurately reading the pitot tube. The hosting is placed at different heights, and baffles are provided at the ends of the two positioning rails to prevent the lifting frame from falling off from the positioning rails. 5. A Pitot tube fixing device for measuring wind speed in a wind resistance test according to claim 1, characterized in that: the lifting frame is rectangular, and a circle of expansion is provided around the positioning hole on the lifting frame Material; the diameter of the positioning hole is slightly larger than the diameter of the Pitot tube, so that the expansion material can embed the Pitot tube tightly. 6. A kind of pitot tube fixing device for measuring wind speed in wind resistance test according to claim 1, characterized in that: the pitot tube is an L-shaped standard pitot tube, and the size of the pitot tube is determined according to the use requirements. When the lifting frame is at the position of the baffle, the pitot tube should be higher than the lifting frame by a certain distance to prevent the fixed bracket from interfering with the wind speed measured by the pitot tube.