Support device for calibrating pitot tube

Abstract

The utility model provides a support device for calibrating a pitot tube, which comprises a first support, a second support and a slide rail, the first support and the second support are both in sliding connection with the slide rail, the first support and the second support are of vertical telescopic structures, the upper end of the first support is provided with a base, and the base bears a composite device end. A first mounting plate and a second mounting plate are arranged on the front side and the rear side of the base respectively, the first mounting plate and the second mounting plate are arranged above the mounting bottom plate in parallel in a front-back spaced mode, the second mounting plate is fixedly connected with a baffle at the rear end of the mounting bottom plate, and the first mounting plate and the second mounting plate are connected through bolts to clamp the front side and the rear side of the composite device end; a mounting clamp is arranged at the upper end of the second support and clamps a metal pipe section. By arranging the sliding rail and the two support devices, the position of the pitot tube measuring head is adjusted according to the appearance difference of the pitot tube to be detected, the preparation time before calibration of the pitot tube is shortened, and the professional degree and the working efficiency in calibration of the pitot tube are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration devices, in particular to a bracket device for pitot tube calibration. Background Art

[0002] A Pitot tube is a tubular device that determines the flow rate of a fluid by measuring the pressure difference between the total pressure and the static pressure of the fluid. The S-type Pitot tube is made of two metal tubes of identical appearance welded in a directional manner. The probe has two openings in opposite directions, and the two opening cross-sections are parallel to each other. When measuring, the total pressure is measured at the opening facing the direction of the airflow, and the static pressure is measured at the opening facing away from the direction of the airflow. When calibrating, the measuring point of the L-type standard Pitot tube and the tested Pitot tube should be on the same cross-section of the working section of the wind tunnel, keep the axis of the probe parallel to the axis of the wind tunnel test section, and install them symmetrically with the center of the wind tunnel axis as the origin.

[0003] According to calibration experience, the pitot tubes in practical applications are mostly composite parameter devices, that is, a single device is composed of multiple sensors, which can simultaneously measure multiple parameters such as flow, moisture content, temperature and pressure, and is often named as smoke sampling gun, etc. One end of this type of sampling gun is the probe of the S-type pitot tube and sensors of parameters such as temperature and humidity, and the other end is a composite device end, generally a digital display screen, with various sensor terminals and two differential pressure holes embedded.

[0004] The size and weight of the composite device end of the Pitot tubes produced by different manufacturers are not the same. Due to the effect of gravity, the position of the Pitot tube probe is easy to move, and it is impossible to ensure that the axis of the Pitot tube probe is parallel to the wind tunnel test section.

[0005] Therefore, it is urgent to provide a calibration bracket device suitable for various types of pitot tubes, which can adjust the position of the probe to meet the relevant requirements in the pitot tube calibration regulations. Summary of the invention

[0006] The utility model aims to provide a bracket device for calibrating a pitot tube.

[0007] In order to achieve the above purpose, the technical solution of the utility model is:

[0008] A bracket device for calibrating a pitot tube, the pitot tube comprising a composite device end, a metal pipe section and a probe, characterized in that the bracket device comprises a first bracket, a second bracket and a slide rail, the first bracket and the second bracket are both slidably connected to the slide rail, the first bracket and the second bracket are both retractable structures in the vertical direction, the upper end of the first bracket is provided with a base, the base carries the composite device end, the front and rear sides of the base are respectively provided with a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are spaced front and rear and arranged parallel to each other above a mounting base plate, the second mounting plate is fixedly connected to a baffle at the rear end of the mounting base plate, the first mounting plate and the second mounting plate are connected by bolts to clamp the front and rear sides of the composite device end, the upper end of the second bracket is provided with a mounting clamp, the mounting clamp clamps the metal pipe section.

[0009] Further, the first bracket includes a first bracket seat, a first lifting column is provided on the upper part of the first bracket seat, the first lifting column is inserted into a slot of the first bracket seat along a vertical direction, and the first lifting column is connected to the first bracket seat by a first bolt;

[0010] The second bracket includes a second bracket seat, a second lifting column is provided on the upper part of the second bracket seat, the second lifting column is inserted into the slot of the second bracket seat along the vertical direction, and the second lifting column is connected to the second bracket seat by a second bolt.

[0011] Furthermore, a third bolt and a fourth bolt are provided through the first mounting plate at the front and rear, and the third bolt and the fourth bolt are respectively located at the left and right ends of the first mounting plate.

[0012] Furthermore, the third bolt and the fourth bolt are both sleeved with a first nut and a second nut, and the first nut and the second nut are located at the front and rear sides of the first mounting plate.

[0013] Furthermore, a first gasket is provided on the rear side of the first nut, and a second gasket is provided on the front side of the second nut. When the first nut and the second nut are tightened, the first gasket and the second gasket clamp the front and rear sides of the first mounting plate.

[0014] Furthermore, the rear ends of the third bolt and the fourth bolt are both provided with expansion washers, and when the third bolt and the fourth bolt are tightened, the expansion washers are fitted with the second mounting plate.

[0015] Furthermore, two clamps are provided on the slide rail, and the clamps are connected to the slide rail via clamp bolts, and the clamps limit the lower ends of the first bracket and the second bracket.

[0016] Furthermore, a second groove is provided at the upper end of the first mounting plate along the front-to-back direction, and a first groove is provided at the upper end of the second mounting plate along the front-to-back direction, and both the first groove and the second groove are arc-shaped.

[0017] Furthermore, the mounting clip is in a semicircular arc structure penetrating in the left-right direction.

[0018] The utility model provides a slide rail and two bracket devices, can adjust the position of the pitot tube probe according to the appearance difference of the pitot tube to be inspected, reduce the preparation time before pitot tube calibration, reduce the multiple manpower input in the process of adjusting the pitot tube position, and improve the professionalism and work efficiency in pitot tube calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the positional relationship between the pitot tube probe and the wind tunnel test section of the utility model;

[0021] Figure 3 It is a side cross-sectional schematic diagram of the slide rail of the utility model;

[0022] Figure 4 It is a schematic diagram of a fixture for the slide rail of the utility model;

[0023] Figure 5 This is a schematic diagram of the connection between the first mounting plate and the second mounting plate of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the first mounting plate and the second mounting plate of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the second lifting column of the utility model.

[0026] Reference numerals:

[0027] 1 first bracket, 11 first lifting column, 12 first bolt, 13 base, 2 second bracket,

[0028] 21 second lifting column, 22 second bolt, 3 slide rail, 31 fixture, 32 fixture bolt, 4 mounting clamp,

[0029] 5 first mounting plate, 51 third bolt, 52 fourth bolt, 53 mounting base plate,

[0030] 54 first nut, 55 first washer, 56 second nut, 57 second washer, 58 extended washer,

[0031] 6 second mounting plate, 7 first groove, 8 second groove, 9 Pitot tube,

[0032] 91 composite device end, 92 metal pipe section, 93 pitot tube probe, 94 wind tunnel wall. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The utility model discloses a bracket device for calibrating a pitot tube, such as Figure 1 As shown, the Pitot tube 9 includes a composite device end 91, a metal pipe section 92 and a probe 93, and the bracket device includes a first bracket 1, a second bracket 2 and a slide rail 3. The first bracket 1 and the second bracket 2 are both slidably connected to the slide rail 3, and the first bracket 1 and the second bracket 2 are both retractable structures along the vertical direction.

[0035] The first bracket 1 comprises a first bracket seat, a first lifting column 11 is arranged on the upper part of the first bracket seat, the first lifting column 11 is vertically inserted into a slot of the first bracket seat, and the first lifting column 11 is movably connected to the first bracket seat via a first bolt 12 .

[0036] The second bracket 2 includes a second bracket seat, and a second lifting column 21 is provided on the upper part of the second bracket seat. The second lifting column 21 is vertically inserted into a slot of the second bracket seat, and the second lifting column 21 is movably connected to the second bracket seat by a second bolt 22.

[0037] The distance between the composite device end 91, the metal pipe section 92 and the horizontal plane where the slide rail 3 is located is adjusted by the first lifting column 11 and the second lifting column 21 to keep the axis of the Pitot tube probe 93 parallel to the axis of the wind tunnel test section and the measuring point position is on the same cross-section of the wind tunnel working section as the L-shaped standard Pitot tube probe (symmetrically installed with the center of the wind tunnel axis as the origin).

[0038] like Figure 3 and Figure 4 As shown, the slide rail 3 is a hollow structure in a rectangular parallelepiped, and two clamps 31 are provided on the slide rail 3. The clamps 31 are connected to the slide rail 3 through clamp bolts 32. When the position adjustment of the first bracket 1 and the second bracket 2 is completed, the clamp bolts 32 are tightened to limit the lower ends of the first bracket 1 and the second bracket 2. The first bracket 1 and the second bracket 2 are horizontally moved through the slide rail 3 to keep the metal pipe section 92 perpendicular to the wind tunnel wall 94. Figure 2 .

[0039] A base 13 is provided at the upper end of the first bracket 1, and the base 13 supports the composite device end 91. A first mounting plate 5 and a second mounting plate 6 are respectively provided on the front and rear sides of the base 13. The first mounting plate 5 and the second mounting plate 6 are spaced apart from each other and arranged in parallel above the mounting base plate 53. The second mounting plate 6 is fixedly connected to the baffle at the rear end of the mounting base plate 53. The first mounting plate 5 and the second mounting plate 6 are connected by bolts to clamp the front and rear sides of the composite device end 91.

[0040] like Figure 7 As shown, a mounting clamp 4 is provided at the upper end of the second bracket 2 . The mounting clamp 4 is in a semicircular arc structure that penetrates in the left-right direction. The mounting clamp 4 clamps the metal pipe section 92 .

[0041] like Figure 1 As shown, the first mounting plate 5 is penetrated by a third bolt 51 and a fourth bolt 52 at the front and rear ends, and the third bolt 51 and the fourth bolt 52 are respectively located at the left and right ends of the first mounting plate 5. The third bolt 51 and the fourth bolt 52 are sleeved with a first nut 54 and a second nut 56. The first nut 54 and the second nut 56 are located at the front and rear sides of the first mounting plate 5. A first gasket 55 is provided at the rear side of the first nut 54, and a second gasket 57 is provided at the front side of the second nut 56. When the first nut 54 and the second nut 56 are tightened, the first gasket 55 and the second gasket 57 clamp the front and rear sides of the first mounting plate 5, thereby completing the horizontal and vertical fixation of the composite device end 91, see Figure 5 .

[0042] The first nut 54, the first gasket 55, the second nut 56 and the second gasket 57 are combined to complete the position movement and fixation of the first mounting plate 5. The rear ends of the third bolt 51 and the fourth bolt 52 are both provided with expansion gaskets 58. When the third bolt 51 and the fourth bolt 52 are tightened, the expansion gasket 58 fits with the second mounting plate 6.

[0043] like Figure 6 As shown, the upper end of the first mounting plate 5 is provided with a second groove 8 along the front-to-back direction, and the upper end of the second mounting plate 6 is provided with a first groove 7 along the front-to-back direction. Both the first groove 7 and the second groove 8 are arc-shaped. When the hose is connected to the differential pressure hole of the composite device end 91, if the differential pressure hole opening is not on the two sides of the composite device end 91, the hose may be bent. At this time, the hose can be placed on the first groove 7 or the second groove 8.

[0044] The utility model comprises the following steps during use:

[0045] Step S1) according to the size of the wind tunnel, determine the position of the slide rail 3 that needs to be adjusted, move along the slide rail 3 and fix the first bracket 1 and the second bracket 2 by the fixture 31, and ensure that the section of the metal pipe section 92 of the pitot tube in the length direction is perpendicular to the wind tunnel wall 94;

[0046] Step S2) adjusting the second lifting column 21 and the mounting clamp 4, keeping the axis of the pitot tube probe 93 parallel to the axis of the wind tunnel test section, and the measuring point position and the L-shaped standard pitot tube probe are on the same cross section of the wind tunnel working section, and tightening the second bolt 22;

[0047] Step S3) If the S-type pitot tube to be inspected does not have a composite device end 91, the structure is two metal pipes of the same shape welded and two open probes in opposite directions, adjust the base 13 and the mounting clamp 4 to the same height, and the preparation work before the pitot tube calibration can be completed. If the composite device end 91 has different shapes, continue to step S4;

[0048] Step S4) According to the shape and weight of the composite device end 91, the first lifting column 11 is adjusted so that the base 13 can support the bottom surface of the composite device end 91, and the second bracket 2 is matched so that the cross section of the metal pipe section 92 in the length direction is parallel to the ground, and the first bolt 12 is tightened;

[0049] Step S5) adjusting the first mounting plate 5 and the second mounting plate 6 along the horizontal plane direction of the base 13, evaluating the vertical position of the composite device end 91 according to the different sizes of the composite device end 91, and tightening the third bolt 51 and the fourth bolt 52 when the position of the pitot tube probe 93 meets the requirements to fix the positions of the first mounting plate 5 and the second mounting plate 6;

[0050] Step S6) The hose connected to the differential pressure hole of the pitot tube is placed on the first groove 7 and the second groove 8 to serve as a buffer in the vertical direction to avoid the influence of the bending of the hose on the differential pressure value measurement.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A support device for calibrating a pitot tube, the pitot tube (9) comprising a composite device end (91), a metal tube section (92) and a probe (93), characterized in that: The support device comprises a first support (1), a second support (2) and a slide rail (3); the first support (1) and the second support (2) are both slidably connected to the slide rail (3); the first support (1) and the second support (2) are both retractable structures in a vertical direction; a base (13) is provided at the upper end of the first support (1); the base (13) supports the composite device end (91); a first mounting plate (5) and a second mounting plate (6) are respectively provided at the front and rear sides of the base (13); the first mounting plate (5) and the second mounting plate (6) are spaced from each other and arranged parallel to each other above the mounting base plate (53); the second mounting plate (6) is fixedly connected to a baffle at the rear end of the mounting base plate (53); the first mounting plate (5) and the second mounting plate (6) are connected by bolts to clamp the front and rear sides of the composite device end (91); a mounting clamp (4) is provided at the upper end of the second support (2); the mounting clamp (4) clamps the metal pipe section (92).

2. The bracket device for pitot tube calibration according to claim 1, characterized in that: The first bracket (1) comprises a first bracket seat, a first lifting column (11) is provided on the upper part of the first bracket seat, the first lifting column (11) is inserted into a slot of the first bracket seat in a vertical direction, and the first lifting column (11) is connected to the first bracket seat via a first bolt (12); The second bracket (2) comprises a second bracket seat, a second lifting column (21) is provided on the upper part of the second bracket seat, the second lifting column (21) is inserted into a slot of the second bracket seat in a vertical direction, and the second lifting column (21) is connected to the second bracket seat via a second bolt (22).

3. The bracket device for pitot tube calibration according to claim 1, characterized in that: The first mounting plate (5) is penetrated by a third bolt (51) and a fourth bolt (52) at the front and rear, and the third bolt (51) and the fourth bolt (52) are respectively located at the left and right ends of the first mounting plate (5).

4. The bracket device for pitot tube calibration according to claim 3, characterized in that: The third bolt (51) and the fourth bolt (52) are both sleeved with a first nut (54) and a second nut (56), and the first nut (54) and the second nut (56) are located at the front and rear sides of the first mounting plate (5).

5. The bracket device for pitot tube calibration according to claim 4, characterized in that: A first gasket (55) is provided on the rear side of the first nut (54), and a second gasket (57) is provided on the front side of the second nut (56); when the first nut (54) and the second nut (56) are tightened, the first gasket (55) and the second gasket (57) clamp the front and rear sides of the first mounting plate (5).

6. The bracket device for pitot tube calibration according to claim 4, characterized in that: The rear ends of the third bolt (51) and the fourth bolt (52) are both provided with expansion washers (58), and when the third bolt (51) and the fourth bolt (52) are tightened, the expansion washers (58) fit the second mounting plate (6).

7. The bracket device for pitot tube calibration according to claim 1, characterized in that: Two clamps (31) are provided on the slide rail (3), and the clamps (31) are connected to the slide rail (3) via clamp bolts (32). The clamps (31) limit the lower ends of the first bracket (1) and the second bracket (2).

8. The bracket device for pitot tube calibration according to claim 1, characterized in that: The upper end of the first mounting plate (5) is provided with a second groove (8) along the front-to-back direction, and the upper end of the second mounting plate (6) is provided with a first groove (7) along the front-to-back direction; both the first groove (7) and the second groove (8) are arc-shaped.

9. The bracket device for pitot tube calibration according to claim 1, characterized in that: The mounting clip (4) is in the form of a semicircular arc structure that penetrates in the left-right direction.

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