阅读说明：本技术 一种管道测速装置 (Pipeline speed measuring device ) 是由 毛海福 戴剑 贺东恺 苟艳波 万良田 于 2019-12-06 设计创作，主要内容包括：本发明提供了一种管道测速装置。包括机架和沿高度方向依次设置在机架上的三个测速机构；所述测速机构包括毕托管和直线模组；三个所述直线模组呈角度分布；三个所述直线模组长度方向延伸交于被测管道圆心,每个所述直线模组的滑块上安装有毕托管,毕托管能沿直线模组长度方向作直线运动,测量被测管道不同管径位置的风速,相邻两直线模组之间间隔60°,实现对被测管道内各区域测量点的覆盖。本发明通过设置两两间隔60°的三个直线模组,将毕托管安装在直线模组的滑块上沿直线模组长度方向滑动,对圆形管道径向测量点进行全覆盖测量；通过控制直线模组的运动来保证毕托管测量位置的精度和重复测量的一致性,提升测量结果的准确性。(The invention provides a pipeline speed measuring device. The device comprises a rack and three speed measuring mechanisms which are sequentially arranged on the rack along the height direction; the speed measuring mechanism comprises a pitot tube and a linear module; the three linear modules are distributed in an angle; the length directions of the three linear modules extend to intersect with the circle center of the measured pipeline, a pitot tube is mounted on a sliding block of each linear module, the pitot tube can do linear motion along the length direction of the linear modules to measure the wind speeds of the measured pipeline at different pipe diameter positions, the interval between every two adjacent linear modules is 60 degrees, and the coverage of measuring points in each area in the measured pipeline is achieved. According to the invention, through arranging three linear modules with 60-degree intervals in pairs, the Pitot tube is arranged on the slide block of the linear module and slides along the length direction of the linear module, and full-coverage measurement is carried out on the radial measurement point of the circular pipeline; the precision of the Pitot tube measuring position and the consistency of repeated measurement are guaranteed by controlling the movement of the linear module, and the accuracy of the measuring result is improved.)

1. A pipeline speed measuring device is characterized by comprising a rack (1) and three speed measuring mechanisms (2) which are sequentially arranged on the rack (1) along the height direction;

the speed measuring mechanism (2) comprises a pitot tube (21) and a linear module (22); the three linear modules (22) are distributed in an angle; the length direction of the three straight line modules (22) extends to be intersected with the circle center of the measured pipeline, a pitot tube (21) is installed on a sliding block of each straight line module (22), the pitot tube (21) can do linear motion along the length direction of the straight line module (22), the wind speeds of different pipe diameter positions of the measured pipeline are measured, and the coverage of measuring points of each area in the measured pipeline is realized.

2. The pipeline speed measuring device according to claim 1, wherein the rack (1) comprises a screw mechanism (11), and an upper mounting rack (12), a middle mounting rack (13) and a lower mounting rack (14) which are sequentially arranged along the height direction of the screw mechanism (11); three straight line module (22) are installed respectively on last mounting bracket (12), well mounting bracket (13) and lower mounting bracket (14), and interval 60 between two adjacent straight line module (22), and the straight line module (22) length direction that is in the meso position is parallel with the horizontal plane.

3. A pipeline tachometer apparatus as claimed in claim 2, wherein the upper (12), middle (13) and lower (14) mounting brackets each comprise a removable mounting bracket (15); the three mounting racks (15) are sequentially mounted on the screw rod mechanism (11) along the height direction.

4. A pipeline speed measuring device according to claim 3, wherein a pair of fixing nuts (16) are provided at the connection of the mounting bracket (15) and the screw mechanism (11) for adjusting and fixing the height positions of the upper mounting bracket (12), the middle mounting bracket (13) and the lower mounting bracket (14).

5. A pipeline speed measuring device according to claim 4, wherein the mounting bracket (15) is provided with a waist-shaped hole along the length direction thereof for adjusting the horizontal distance of the upper mounting bracket (12), the middle mounting bracket (13) and the lower mounting bracket (14) relative to the pipeline to be measured.

6. A pipeline speed measuring device according to claim 1, wherein the speed measuring mechanism (2) further comprises a positioning block (23) and a pitot tube pressing block (24); the positioning block (23) is arranged on a linear module (22) sliding block, the Pitot tube (21) is flatly placed on the positioning block (23) and is pressed and fixed by a Pitot tube pressing block (24).

7. A pipeline speed measuring device according to claim 6, wherein the upper surface of the locating block (23) is provided with a locating slot matched with the mounting end of the pitot tube (21).

8. A pipeline speed measuring device according to claim 1, wherein the linear module (22) is provided with a travel limit switch (221) for limiting the range of motion of the slider of the linear module (22) and preventing the pitot tube (21) from impacting the wall of the pipeline to be measured during the motion.

9. A pipeline speed measuring device according to claim 1, wherein a control box (17) is arranged on the frame (1); a linear module motor controller is arranged in the control box (17) and used for controlling the positive and negative rotation of the linear module (22) motor and realizing the propulsion and the return of the pitot tube (21).

10. A pipeline speed measuring device according to claim 1, wherein the bottom of the frame (1) is provided with movable casters for rapidly moving the device.

Technical Field

The invention relates to the technical field of detection, in particular to a pipeline speed measuring device.

Background

Pitot tube, also known as pitot tube or velocimeter, is an instrument that measures the difference between the total pressure and the static pressure of a fluid to calculate the flow rate. When the air duct internal flow measurement adopts a Pitot tube traversing method, 24 or more measurement points are arranged under one working condition, as shown in FIG. 2; the traditional measurement mode is that a single pitot tube is adopted to measure the wind speed in the pipeline, and the manual measurement workload is very large when the speed measurement work of all measurement points is completed; and the radial positioning precision, the measurement angle positioning precision and the measurement repeatability of the pitot tube during manual measurement are difficult to ensure, and the measurement result is adversely affected.

In summary, there is a need for a pipeline speed measuring device to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a pipeline speed measuring device to solve the problems of measuring a plurality of speed measuring points by using a pitot tube and ensuring the position precision of the measuring points.

In order to achieve the purpose, the invention provides a pipeline speed measuring device which comprises a rack and three speed measuring mechanisms, wherein the three speed measuring mechanisms are sequentially arranged on the rack along the height direction;

the speed measuring mechanism comprises a pitot tube and a linear module; the three linear modules are distributed in an angle; the length directions of the three linear modules extend to intersect with the circle center of the measured pipeline, a pitot tube is mounted on a sliding block of each linear module, the pitot tube can do linear motion along the length direction of the linear module, the wind speeds of different pipe diameter positions of the measured pipeline are measured, and the coverage of measuring points in each area in the measured pipeline is realized.

Preferably, the rack comprises a screw rod mechanism, and an upper mounting rack, a middle mounting rack and a lower mounting rack which are sequentially arranged along the height direction of the screw rod mechanism; three the sharp module is installed respectively on last mounting bracket, well mounting bracket and lower mounting bracket, and interval 60 between two adjacent sharp modules is parallel with the horizontal plane in the straight line module length direction of meso position.

Preferably, the upper mounting frame, the middle mounting frame and the lower mounting frame comprise detachable mounting frames; and the three mounting frames are sequentially mounted on the screw rod mechanism along the height direction.

Preferably, the joint of the mounting rack and the screw rod mechanism is provided with paired fixing nuts for adjusting and fixing the height positions of the upper mounting rack, the middle mounting rack and the lower mounting rack.

Preferably, the mounting rack is provided with a waist-shaped hole along the length direction for adjusting the horizontal distance between the upper mounting rack, the middle mounting rack and the lower mounting rack relative to the pipeline to be measured.

Preferably, the speed measuring mechanism further comprises a positioning block and a pitot tube pressing block; the locating piece is installed on the straight line module slider, the pitot tube is kept flat on the locating piece to it is fixed to compress tightly with the pitot tube briquetting.

Preferably, the locating piece upper surface is equipped with the constant head tank that matches with the pitot tube mounting end.

Preferably, the straight line module is provided with a travel limit switch for limiting the motion range of the straight line module slide block and preventing the pitot tube from impacting the pipe wall of the pipeline to be measured in the motion process.

Preferably, a control box is arranged on the rack; the control box is internally provided with a linear module motor controller for controlling the forward and reverse rotation of the linear module motor to realize the propulsion and the return of the pitot tube.

Preferably, the bottom of the frame is provided with a movable caster for rapidly moving the device.

The technical scheme of the invention has the following beneficial effects:

(1) in the invention, the Pitot tube is arranged on the slide block of the linear module by arranging three linear modules with 60 degrees at intervals in pairs, and the Pitot tube slides along the length direction of the linear module, so that the device can carry out full-coverage measurement on the radial measuring point of the circular pipeline; the precision of the Pitot tube measuring position and the consistency of repeated measurement are guaranteed by controlling the movement of the linear module, and the accuracy of the measuring result is improved.

(2) According to the invention, the upper mounting rack, the middle mounting rack and the lower mounting rack are mounted on the screw rod mechanism through the mounting racks, and the mounting racks can be adjusted in the vertical direction of the screw rod mechanism, so that the vertical heights of the upper mounting rack, the middle mounting rack and the lower mounting rack are adjusted; the upper mounting frame, the middle mounting frame and the lower mounting frame can realize the adjustment of the horizontal positions of the upper mounting frame, the middle mounting frame and the lower mounting frame relative to the pipeline to be measured by adjusting the mounting positions among the upper mounting inclined frame, the middle mounting plate, the lower mounting inclined frame and the mounting frames; the wind speed measurement of pipelines with different pipe diameters and different height positions is facilitated.

(3) In the invention, the positioning block is provided with the positioning groove matched with the interface end of the pitot tube, so that each pitot tube can be ensured to be installed in place, and the influence on the measurement result caused by the installation error of the pitot tube is prevented.

(4) According to the invention, the linear module motor controller and the touch screen are arranged in the control box, so that the motion of the linear module sliding block can be conveniently controlled, the advance and the return of the pitot tube are realized, the automatic positioning of the pitot tube is realized, the intelligent operation of measurement is realized, and the workload of measuring personnel is reduced.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a pipeline speed measuring device;

FIG. 2 is a diagram of a circular pipeline inflow measurement point arrangement;

FIG. 3 is a schematic view of a mount configuration;

FIG. 4 is a schematic view of the upper mounting ramp structure;

FIG. 5 is a schematic view of a mid-mounting plate configuration;

FIG. 6 is a schematic view of a lower mounting ramp structure;

FIG. 7 is a schematic view of the use of the Pitot tube in combination with a locating block.

Wherein, 1, frame, 11, screw rod mechanism, 12, go up the mounting bracket, 121, go up the installation sloping frame, 13, well mounting bracket, 131, well mounting panel, 14, lower mounting bracket, 141, lower installation sloping frame, 15, mounting bracket, 16, fixation nut, 17, control box, 2, speed measurement mechanism, 21, pitot tube, 22, sharp module, 221, travel limit switch, 23, locating piece, 24, pitot tube briquetting, 3, by survey the pipeline.

Detailed Description

Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Referring to fig. 1 to 7, a pipeline speed measuring device is applied to measuring speed of a circular pipeline in the present embodiment.

A pipeline speed measuring device comprises a rack 1 and three speed measuring mechanisms 2 which are sequentially arranged on the rack 1 along the height direction;

referring to fig. 1, the speed measuring mechanism 2 includes a pitot tube 21 and a linear module 22; the three straight line modules 22 are distributed in an angle mode, the length directions of the three straight line modules 22 extend to intersect the center of the measured pipeline 3, a standard L-shaped pitot tube 21 is installed on each sliding block of the straight line modules 22, the pitot tube 21 can do linear motion along the length direction of the straight line modules 22, the speed measuring end of the pitot tube 21 is aligned to the fluid direction, the wind speeds of the measured pipeline 3 at different pipe diameter positions are measured, and the coverage of measuring points in each area in the measured pipeline 3 shown in the figure 2 is achieved.

The common linear module 22 has a synchronous belt type and a screw rod type, a belt or a screw rod of the linear module 22 is provided with a slide block, and the slide block can do linear reciprocating motion along with the belt or the slide block does linear reciprocating motion on the screw rod through the drive of a motor; the bottom of the linear module 22 is provided with a T-shaped groove and nuts are installed to realize the installation of the linear module 22.

Referring to fig. 1, the rack 1 includes a screw mechanism 11, and an upper mounting frame 12, a middle mounting frame 13 and a lower mounting frame 14 sequentially arranged along a height direction of the screw mechanism 11; the three linear modules 22 are respectively arranged on the upper mounting frame 12, the middle mounting frame 13 and the lower mounting frame 14; the interval between two adjacent linear modules 22 is 60 degrees, and the length direction of the linear module 22 in the middle position is parallel to the horizontal plane.

Referring to fig. 1, 3 and 4, in the present embodiment, the upper mounting frame 12 includes a mounting frame 15 and an upper mounting inclined frame 121, the upper mounting inclined frame 121 is mounted on the mounting frame 15, and the linear module 22 is mounted on a linear module mounting surface on which the upper mounting inclined frame 121 is inclined; the included angle between the linear module installation surface of the upper installation inclined frame 121 and the installation surface of the installation frame is 60 degrees.

Referring to fig. 1, 3 and 5, in the present embodiment, the middle mounting bracket 13 includes a mounting bracket 15 and a middle mounting plate 131, the middle mounting plate 131 is mounted on the mounting bracket 15, and the linear module 22 is horizontally mounted on the linear module mounting surface of the middle mounting plate 131.

Referring to fig. 1, 3 and 6, in the present embodiment, the lower mounting frame 14 includes a mounting frame 15 and a lower mounting inclined frame 141, the lower mounting inclined frame 141 is hung on the mounting frame 15, and the linear module 22 is mounted on a linear module mounting surface on which the lower mounting inclined frame 141 is inclined; the included angle between the mounting frame mounting surface of the lower mounting inclined frame 141 and the linear module mounting surface is 60 degrees.

Referring to fig. 4 to 6, the linear module mounting surfaces of the upper mounting inclined frame 121, the middle mounting plate 131 and the lower mounting inclined frame 141 are provided with waist-shaped holes for mounting the linear modules 22 and adjusting the positions of the linear modules 22, so that the positions of the three linear modules 22 meet the requirements.

Referring to fig. 1, three mounting frames 15 are sequentially mounted on the screw mechanism 11 along the height direction; a pair of fixing nuts 16 are arranged at the joint of the mounting frame 15 and the screw rod mechanism 11, and the fixing nuts 16 are respectively positioned on the upper surface and the lower surface of the joint of the mounting frame 15 and the screw rod and used for adjusting and fixing the height positions of the upper mounting frame 12, the middle mounting frame 13 and the lower mounting frame 14; when the position of the mounting frame 15 needs to be adjusted, when the position is adjusted upwards, the fixing nut 16 on the upper side of the mounting frame 15 is loosened to a proper position, the mounting frame 15 is lifted, and then the fixing nut 16 on the other side of the mounting frame 15 is rotated, so that the mounting frame 15 is lifted; when descending, firstly loosening the fixing nut 16 on the lower side of the mounting rack 15 to a proper position, putting down the mounting rack 15, and then rotating the fixing nut 16 on the other side of the mounting rack 15 to realize the descending of the mounting rack 15; the linear bearing is arranged at the connecting position of the mounting frame 15 and the polished rod of the screw rod mechanism 11, so that the mounting frame 15 can move more smoothly along the screw rod mechanism 11.

Referring to fig. 3, the mounting bracket 15 is provided with a waist-shaped hole along the length direction thereof for adjusting the mounting positions of the upper mounting bracket 121, the middle mounting bracket 131 and the lower mounting bracket 141, thereby adjusting the horizontal distances of the upper mounting bracket 12, the middle mounting bracket 13 and the lower mounting bracket 14 with respect to the measured pipe 3.

Referring to fig. 1, the speed measuring mechanism 2 further comprises a positioning block 23 and a pitot tube pressing block 24; the positioning block 23 is arranged on a linear module 22 slide block, the pitot tube 21 is flatly placed on the positioning block 23 and is pressed and fixed by a pitot tube pressing block 24.

The common interface end of the pitot tube 21 has a cross shape, a T shape and a Y shape, the upper surface of the positioning block 23 is provided with a positioning groove matched with the mounting end (namely the interface end) of the pitot tube 21, the positioning groove structure can be designed into a cross shape, a T shape or a Y shape according to the structure of the pitot tube 21, referring to fig. 7, in the embodiment, the pitot tube 21 with the cross-shaped interface end is used, and the positioning block 23 is provided with the cross-shaped positioning groove to ensure that the pitot tube 21 is mounted in place.

Referring to fig. 1, the linear module 22 is provided with a travel limit switch 221 for limiting the movement range of the slider of the linear module 22 and preventing the pitot tube 21 from impacting the wall of the measured pipeline 3 in the movement process, so as to prevent the pitot tube 21 from being damaged and affecting the wind speed measurement result.

Referring to fig. 1, a control box 17 is arranged on the frame 1; the device power supply, the programmable logic controller, the linear module motor controller and the touch screen are arranged in the control box 17, the linear module motor controller is used for controlling the positive and negative rotation of the linear module 22 motor, the pushing and the returning of the pitot tube 21 are realized through the movement of the sliding block, and the programmable logic controller generates the position information of the measuring point in the pipeline through the diameter size of the measured pipeline 3 and the diameter size of the pitot tube 21.

Referring to fig. 1, the bottom of the frame 1 is provided with a movable caster for rapidly moving the device.

The use method of the pipeline speed measuring device comprises the following steps:

the method comprises the following steps: installing the linear module 22, the upper mounting frame 12, the middle mounting frame 13 and the lower mounting frame 14 and adjusting the positions;

step two: the method comprises the steps that a measuring hole with the diameter 1-2 mm larger than that of a pitot tube 21 is formed in the wall of a measured pipeline 3, the measuring ends of the three pitot tubes 21 extend into the measuring hole of the measured pipeline 3, the direction of the measuring ends is adjusted, the interface ends of the pitot tubes 21 are installed on a positioning block 23 of a corresponding linear module 22 and are pressed tightly, and the pitot tubes 21 are connected to a wind speed data acquisition device;

step three: the linear module 22 slide block is pushed to enable the pitot tube 21 to be just contacted with the inner wall of the measured pipeline 3, two travel limit switches 221 on the linear module 22 are correspondingly adjusted, and the pitot tube 21 is prevented from impacting the pipe wall of the measured pipeline 3 in the subsequent operation.

Step four: the device is electrified, the diameter of the measured pipeline 3 and the diameter of the pitot tube 21 are input on the touch screen of the control box 17, the position information of the measuring point is generated, and the wind speed measurement is carried out on each measuring point.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.