CN103245792B - Combined type equalizing pipe wind speed measuring element - Google Patents

Abstract

The invention discloses a combined pressure equalizing tube wind speed measuring element, which solves the technical problem of difficulty in measuring wind pressure, wind speed and air volume at a large cross-section air outlet. Including a dynamic pressure equalizing tube (1) and a static pressure equalizing tube (3) arranged in parallel between the left bracket (7) and the right bracket (8), and a L on the dynamic pressure equalizing tube (1) Shaped dynamic sampling tube (2), the port of the vertical sampling section tube (10) of the L-shaped dynamic sampling tube (2) points to the direction of the incoming wind, and on the outer wall of the vertical sampling section tube (10) there are four The dynamic pressure small hole (18) is provided with a half-shaped static pressure sampling tube (4) on the static pressure equalizing tube (3), and four holes are arranged at equal intervals on the tube wall of the vertical sampling section tube (12). A static pressure aperture (17) is provided with 4-5 L-shaped dynamic sampling tubes (2) at equal intervals on the dynamic pressure equalizing tube (1). It is especially suitable for the wind speed test of the average dynamic and static pressure between the cooling triangles of the direct air cooling unit.

Description

Combined pressure equalizing tube wind speed measuring element

technical field

The invention relates to a measuring element suitable for gas wind pressure, wind speed and air volume flowing in a relatively large cross-section, in particular to a measuring element for the wind pressure, wind speed, and air volume of the exhaust outlet on the outer upper part of the cooling triangle of a direct air cooling system.

Background technique

Wind pressure, wind speed, and air volume are the basic test parameters in the aerodynamic system. For gases flowing in large cross-sections, in order to obtain more accurate cross-sectional flow rates, a large number of wind speed sensors and multi-channel acquisition systems must be arranged in a certain grid distribution. However, the point-by-point measurement method cannot obtain satisfactory test results due to long test time and poor simultaneity. Especially for direct air-cooling units, the accurate acquisition of the air volume of the cooling unit can be used to calculate the cooling heat of the system, and to make a reasonable evaluation of the heat transfer performance of the air-cooled radiator. The air cooling system has a large air outlet area, and the ventilation area between two cooling triangles alone reaches more than 100 square meters. However, large-scale units have dozens of cooling triangle units. Such a large area brings great difficulties to the measurement of air volume and other parameters. .

Contents of the invention

The invention provides a combined pressure equalizing tube wind speed measuring element, which solves the technical problem of difficulty in measuring wind pressure, wind speed and air volume at a large-section air outlet.

The present invention solves the above technical problems through the following technical solutions:

A combined pressure equalizing tube wind speed measuring element, including a left bracket and a right bracket, a dynamic pressure equalizing tube and a static pressure equalizing tube are arranged in parallel between the left bracket and the right bracket, and a dynamic pressure equalizing tube is arranged on the dynamic pressure equalizing tube There is an L-shaped dynamic sampling tube, the horizontal pressure transmission section tube of the L-shaped dynamic sampling tube is connected with the dynamic pressure equalization tube, the port of the vertical sampling section tube of the L-shaped dynamic sampling tube points to the direction of the incoming wind, and the outer wall of the vertical sampling section tube There are four small dynamic pressure holes arranged at intervals of upper arc, and a half-shaped static pressure sampling tube is arranged on the static pressure equalizing tube, and the vertical pressure transmission section tube of the half-shaped static pressure sampling tube and the static pressure equalizing tube Connected, the horizontal pressure transmission section tube of the half-shaped static pressure sampling tube is set in parallel with the horizontal pressure transmission section tube of the L-shaped dynamic sampling tube, and the vertical sampling section tube of the half-shaped static pressure sampling tube is parallel to the L-shaped dynamic sampling tube The vertical sampling section of the tube is set in parallel, and the port of the vertical sampling section is provided with a hemispherical plug. On the tube wall of the vertical sampling section, four static pressure holes are arranged at equal intervals. The pressure equalizing tube is provided with 4-5 L-shaped dynamic sampling tubes at equal intervals, and 4-5 half-shaped static pressure sampling tubes are arranged at equal intervals.

One end of the static pressure equalizing pipe is connected with a first three-way joint through a screw, and one end of the dynamic pressure equalizing pipe is connected with a second three-way joint through another screw.

The ratio of the diameter of the L-shaped dynamic sampling tube to the diameter of the dynamic pressure equalizing tube is 1:5-1:4; the length of the horizontal pressure transmission section tube is equal to the length of the vertical sampling section tube, and the length of the horizontal pressure transmission section tube The sum of the lengths of the vertical sampling section tubes is 10-15 times the diameter of the L-shaped dynamic sampling tube.

The invention has wide application range, reliable working performance and high cost performance, and is especially suitable for the average dynamic and static pressure between the cooling triangles of the direct air-cooling unit, wind speed test and ventilation rate calculation.

Description of the drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of L-shaped dynamic sampling tube 2 of the present invention;

Fig. 3 is a schematic structural view of the half-shaped static pressure sampling tube 4 of the present invention.

Detailed ways

A combined pressure equalizing tube wind speed measuring element, comprising a left bracket 7 and a right bracket 8, a dynamic pressure equalizing tube 1 and a static pressure equalizing tube 3 are arranged in parallel between the left bracket 7 and the right bracket 8. The pressure equalizing tube 1 is provided with an L-shaped dynamic sampling tube 2, the horizontal pressure transmission section tube 9 of the L-shaped dynamic sampling tube 2 communicates with the dynamic pressure equalizing tube 1, and the vertical sampling section tube 10 of the L-shaped dynamic sampling tube 2 The port points to the incoming wind direction, and four dynamic pressure holes 18 are arranged at equal arc intervals on the outer wall of the vertical sampling section pipe 10, and a half-shaped static pressure sampling pipe 4 is arranged on the static pressure equalizing pipe 3, and a half-mouth The vertical pressure transmission section pipe 13 of the glyph static pressure sampling pipe 4 is connected with the static pressure equalizing pipe 3, and the horizontal pressure transmission section pipe 11 of the half-shaped static pressure sampling pipe 4 is the horizontal pressure transmission section with the L-shaped dynamic sampling pipe 2 The pipe 9 is arranged in parallel, the vertical sampling section pipe 12 of the half-shaped static pressure sampling pipe 4 is arranged in parallel with the vertical sampling section pipe 10 of the L-shaped dynamic sampling pipe 2, and a semicircle is arranged on the port of the vertical sampling section pipe 12 The ball plug 16 is provided with four static pressure holes 17 at equal intervals on the pipe wall of the vertical sampling section pipe 12, and 4-5 L-shaped dynamic holes are arranged at equal intervals on the dynamic pressure equalizing pipe 1. Sampling tube 2 is provided with 4-5 half-shaped static pressure sampling tubes 4 at equal intervals.

One end of the static pressure equalizing pipe 3 is connected with a first three-way joint 5 through a screw 14 , and one end of the dynamic pressure equalizing pipe 1 is connected with a second three-way joint 6 through another screw 15 .

The ratio of the diameter of the L-shaped dynamic sampling tube 2 to the diameter of the dynamic pressure equalizing tube 1 is 1:5-1:4; the length of the horizontal pressure transmission tube 9 is equal to the length of the vertical sampling tube 10, and the horizontal pressure transmission The length sum of the length of the section pipe 9 and the length of the vertical sampling section pipe 10 is 10-15 times of the diameter of the L-shaped dynamic sampling pipe 2 .

The sampling tube of the present invention adopts uniform arrangement on the pressure equalizing tube. Generally, the number of sampling points is 5-10 to form a multi-point equalizing pressure measurement. The same dynamic pressure sampling tube and static pressure sampling tube have a length of 2-3 mm The dislocation, the space distance between the dynamic pressure sampling tube and the end of the static pressure sampling tube is controlled between 3-5 mm, to avoid the dynamic and static pressure sampling tubes being too close to interfere with each other, and the sampling points that are too far away are too far away.

The invention adopts the pressure equalizing tube measurement method, can obtain the average dynamic and static pressure on the measurement length, and then calculate the average wind speed and air volume. In practical application, the multi-way joint can be used to connect several measuring elements to measure the average parameter of the air outlet of a certain section, and it can also be combined into a network of measuring points to measure the average parameter of the air outlet of a certain section. The invention has wide application range, reliable working performance and high cost performance, and is especially suitable for the average dynamic and static pressure between the cooling triangles of the direct air-cooling unit, wind speed test and ventilation rate calculation.

Claims (2)

1. a combined type balance pipe measuring wind speed element, comprise left socle (7) and right support (8), between left socle (7) and right support (8), be provided with abreast dynamic pressure balance pipe (1) and static pressure balance pipe (3), it is characterized in that, on dynamic pressure balance pipe (1), be provided with L shaped moving stopple coupon (2), the horizontal pressure transmission section pipe (9) of L shaped moving stopple coupon (2) is communicated with dynamic pressure balance pipe (1), the port of the vertical sampling section pipe (10) of L shaped moving stopple coupon (2) points to the direction of the wind comes from, the first-class radian of outer wall compartment of terrain at vertical sampling section pipe (10) is provided with four dynamic pressure apertures (18), on static pressure balance pipe (3), be provided with half square shape static pressure stopple coupon (4), the vertical pressure transmission section pipe (13) of half square shape static pressure stopple coupon (4) is communicated with static pressure balance pipe (3), the horizontal pressure transmission section pipe (11) of half square shape static pressure stopple coupon (4) is to be arranged in parallel with the horizontal pressure transmission section pipe (9) of L shaped moving stopple coupon (2), the vertical sampling section pipe (12) of half square shape static pressure stopple coupon (4) is to be arranged in parallel with the vertical sampling section pipe (10) of L shaped moving stopple coupon (2), on the port of the vertical sampling section pipe (12) of half square shape static pressure stopple coupon (4), be provided with semi-round ball shutoff (16), on the tube wall of the vertical sampling section pipe (12) of half square shape static pressure stopple coupon (4), be uniformly-spaced provided with four static pressure apertures (17) radian, on dynamic pressure balance pipe (1), be to be equally spaced provided with 4-5 L shaped moving stopple coupon (2), on static pressure balance pipe (3), be equally spaced provided with 4-5 half square shape static pressure stopple coupon (4).

2. a kind of combined type balance pipe measuring wind speed element according to claim 1, it is characterized in that, one end at static pressure balance pipe (3) is connected with the first three-way connection (5) by spiral shell button (14), is connected with the second three-way connection (6) in one end of dynamic pressure balance pipe (1) by another spiral shell button (15).