Pitot tube measuring equipment capable of conveniently adjusting angle in pipeline and flow velocity measuring method of pitot tube measuring equipment

Abstract

The invention relates to the technical field of fluid mechanics measurement, and discloses Pitot tube measuring equipment facilitating angle adjustment in a pipeline and a flow velocity measuring method thereof.The Pitot tube measuring equipment comprises an angle adjusting mechanism, a depth adjusting mechanism is fixedly arranged on one side of the angle adjusting mechanism, and a measurement positioning mechanism is fixedly arranged on the other side of the angle adjusting mechanism; through the synergistic effect of the angle adjusting mechanism and the depth adjusting mechanism, aiming at the working conditions that the diameter is large, the length of a straight pipe section is smaller than 5D and fluid is not fully developed, accurate positioning of a Pitot tube in a pipeline can be ensured, and angle and depth adjustment of a probe can be realized, so that section flow velocity distribution is completely sampled and measured, multi-point measurement is performed, and the working efficiency is improved. The angle and depth of the Pitot tube are automatically adjusted, it is guaranteed that a proper distance is kept between the probe and the liquid level all the time, and even under the condition that the liquid level fluctuates, the continuity and reliability of measurement can be guaranteed, data breakpoints are avoided, and the device adapts to complex and changeable measurement environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid mechanics measurement, and in particular relates to a Pitot tube measuring device with convenient angle adjustment in a pipeline and a flow velocity measurement method thereof. Background Art

[0002] A classic flow measurement device based on the Bernoulli equation, the Pitot tube calculates flow rate by capturing the difference between the total and static pressures of a fluid. It is irreplaceable in fields such as industrial process control and environmental monitoring, and is widely used in scientific research, industry, and environmental monitoring. However, traditional Pitot tubes exhibit significant technical drawbacks in specific operating conditions, such as large pipe diameters exceeding DN500, straight pipe lengths less than 5D, and open or semi-enclosed pipelines.

[0003] When the pipe diameter exceeds DN500, traditional fixed mounting structures (such as flanges or threaded connections) have difficulty ensuring the probe is centered. This results in incomplete sampling of the flow velocity distribution in the measurement section, thus affecting the accuracy of the measurement results. In addition, when the pipe length is less than 5 times the pipe diameter, the flow is not fully developed, and the rigid bracket of the traditional Pitot tube is easily affected by turbulent impact and resonates, which in turn causes pressure signal distortion, causing the measurement results to deviate from the actual value. In addition, fluctuations in the liquid level often lead to intermittent exposure of the probe, which not only increases the measurement difficulty but also easily causes data breakpoints, affecting the continuity and reliability of the data.

[0004] Therefore, in response to the above technical difficulties, it is particularly important to invent a Pitot tube measurement device that can easily adjust the angle. This device is designed to solve the limitations of traditional Pitot tubes under special working conditions and improve the accuracy and reliability of flow rate measurement. Summary of the Invention

[0005] In response to the above problems, the present invention provides a Pitot tube measuring device with convenient angle adjustment in a pipeline and a flow velocity measurement method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a Pitot tube measuring device with convenient angle adjustment in a pipeline and a flow velocity measurement method thereof, comprising an angle adjustment mechanism, a depth adjustment mechanism fixedly provided on one side of the angle adjustment mechanism, and a measurement positioning mechanism fixedly provided on the other side of the angle adjustment mechanism, wherein:

[0007] The angle adjustment mechanism includes a positioning frame, a positioning gear ring is fixedly provided at the bottom end of one side of the positioning frame, two positioning gears are meshed on the tooth surface of the positioning gear ring, one side of the two positioning gears is rotatably connected to a connecting frame, the bottom end of one side of the connecting frame contacts one side of the inner wall of the positioning gear ring, a first motor is fixedly provided on one side of the connecting frame, and the output end of the first motor is fixedly connected to the middle position of one of the positioning gears;

[0008] The depth adjustment mechanism includes a fixed frame fixed to one side of the positioning frame, a positioning groove is opened in the middle position of the fixed frame, a lifting frame is slidably provided in the middle position of the inner wall of the positioning groove, positioning racks are fixed on both sides of the lifting frame, and adjustment gears are rotatably provided on both sides of the inner wall of the positioning groove, the tooth surfaces of the two adjustment gears are respectively engaged with the tooth surfaces of the two positioning racks, and a plurality of Pitot tubes are interspersed in the middle position of the lifting frame, and the top ends of the plurality of Pitot tubes are connected to pressure output holes.

[0009] Preferably, a balance gear is fixedly provided at the middle position of the two adjusting gears through one side of the fixing frame, the tooth surfaces of the two balance gears are engaged with each other, a mounting frame is fixedly provided on one side of the fixing frame, a second motor is fixedly provided on one side of the mounting frame, and the output end of the second motor is fixedly connected to the middle position of one of the balance gears.

[0010] Preferably, clamping blocks are fixedly provided at both ends of the positioning toothed ring, a fixing groove is provided at the bottom end of the positioning toothed ring, and one side of the connecting frame contacts one side of the inner wall of the fixing groove.

[0011] Preferably, three of the Pitot tubes are provided with a first pressure hole at one end, and a avoidance ring is fixedly provided on one side of the multiple first pressure holes; a second pressure hole is provided on one side of the outer wall of the other three Pitot tubes, and a avoidance pad is fixedly provided at one end of the three Pitot tubes; and a avoidance frame is fixedly provided at the bottom end of the outer wall of the lifting frame near the corner of the Pitot tube.

[0012] The two gears are connected with each other at two ends, and the two gears are connected with each other at two ends by a threaded connection, and the two gears are connected with each other at two ends by a threaded connection.

[0013] Preferably, a through hole is opened in the middle position of the positioning helical gear ring, and positioning blocks are fixed on the four sides of the inner wall of the through hole. Sliding grooves are opened on the four sides of the outer wall of the second positioning screw, and one end of the outer wall of the four positioning blocks is in sliding contact with one side of the inner wall of the four sliding grooves respectively.

[0014] Preferably, a limiting groove is provided on one side of the inner wall of the positioning frame, a limiting rod is fixedly provided at one end of the second clamping frame, one end of the outer wall of the limiting rod is in sliding contact with one side of the inner wall of the limiting groove, and anti-slip pads are fixedly provided on both sides of the first clamping frame and both sides of the second clamping frame.

[0015] Preferably, the two first clamping frames and the second clamping frames are clamped and connected to each other with a pipeline opening.

[0016] Preferably, an intelligent control panel is fixedly provided on one side of the positioning frame, and the first motor and the second motor are both electrically connected to an external power supply through the intelligent control panel.

[0017] A method for measuring flow velocity in a pipeline using a Pitot tube measuring device with convenient angle adjustment is as follows:

[0018] Step 1: Observe the method for facilitating the installation of the pipe opening to be measured, and simultaneously insert the two first clamping frames and the second clamping frame of the measuring and positioning mechanism into the outer wall or the inner wall of one end of the pipe opening;

[0019] The second step is to rotate the positioning handle so that the positioning handle drives the second positioning screw to rotate, so that the second positioning screw is threadedly lifted and lowered along the middle position of the support frame, so that the second clamping frame connected to the bottom end of the second positioning screw is rotatably lifted and lowered, and the limiting rod fixed at one end of the second clamping frame is slidably connected to the limiting groove on one side of the inner wall of the positioning frame, so that the second clamping frame is stably lifted and lowered to contact the inner wall or outer wall of the pipe opening;

[0020] The cam is engaged with the first clamping frame and the second clamping frame, and the cam is engaged with the first clamping frame and the second clamping frame, so that the cam is engaged with the first clamping frame and the second clamping frame can be engaged with the first clamping frame and the second clamping frame.

[0021] Step 4: The output end of the first motor fixed to one side of the connecting frame drives one of the positioning gears to rotate, and the tooth surfaces of the two positioning gears are engaged with the tooth surfaces of the positioning gear ring, so that the two positioning gears drive the connecting frame to rotate through the positioning of the fixed groove. The connecting frame is positioned based on the measurement and positioning mechanism so that it rotates along the center of the cross section of the pipe opening as the rotation center;

[0022] Step 5: The output end of the second motor fixed to one side of the mounting frame drives one of the balancing gears to rotate. The two balancing gears mesh with each other, causing the two balancing gears to drive the two adjustment gears to rotate synchronously in opposite directions. The two adjustment gears are then respectively meshed with the tooth surfaces of the positioning racks fixed to both sides of the lifting frame. The positioning slots provided on the inner wall of the fixed frame limit the lifting frame, causing the measuring end of the Pitot tube to be stably raised and lowered.

[0023] Step 6. The liquid flowing on the inner wall of the pipe mouth is dynamically and statically pressurized through the first pressure hole and the second pressure hole opened on the outer wall of the Pitot tube. The obtained pressure value is output to the external pressure sensor through the pressure output hole, and the flow rate data is read according to the pressure value conversion.

[0024] Technical effects and advantages of the present invention:

[0025] 1. Improved measurement accuracy: Through the synergistic effect of the angle adjustment mechanism and the depth adjustment mechanism, the present invention can ensure the precise positioning of the Pitot tube in the pipeline for working conditions with large diameters, straight pipe lengths less than 5D, and underdeveloped fluids. It can also achieve probe angle and depth adjustment, thereby fully sampling the flow velocity distribution of the measurement cross section, performing multi-point measurements, and improving the accuracy of the measurement results.

[0026] 2. Adaptability to complex environments: The present invention uses an intelligent control panel to automatically adjust the angle and depth of the Pitot tube, ensuring that the probe always maintains an appropriate distance from the liquid surface. Even when the liquid level fluctuates, it can ensure measurement continuity and reliability, avoid data breakpoints, and adapt to complex and changing measurement environments.

[0027] 3. Enhanced measurement stability: The present invention optimizes the structural design of the Pitot tube so that the measurement positioning mechanism in the Pitot tube measuring device is stably linked and positioned in a triangular shape, maintaining the stable positioning of the Pitot tube measuring device, reducing the resonance caused by the turbulent impact of the rigid bracket, effectively avoiding the distortion of the pressure signal, enhancing the stability of the measurement, and being suitable for positioning pipelines of different diameters within a certain range.

[0028] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the state of the Pitot tube measuring device of the present invention;

[0031] Figure 2 This is a schematic diagram of the second state of the Pitot tube measuring device of the present invention;

[0032] Figure 3 1 is a schematic diagram of the angle measurement device of the Pitot tube of the present invention;

[0033] Figure 4 This is a second schematic diagram of the angle measurement device of the Pitot tube of the present invention;

[0034] Figure 5 This is a schematic diagram showing the distribution of the angle adjustment mechanism and the depth adjustment mechanism of the present invention;

[0035] Figure 6 is a schematic diagram of the angle adjustment mechanism of the present invention;

[0036] Figure 7 is a schematic diagram of the depth adjustment mechanism of the present invention;

[0037] Figure 8 This is a schematic diagram of the distribution of the regulating gear and the balancing gear of the present invention;

[0038] Figure 9 This is a schematic diagram of the Pitot tube structure of the present invention;

[0039] Figure 10 This invention Figure 9 A diagram of the node is enlarged in the middle;

[0040] Figure 11 It is a schematic diagram of the measuring and positioning mechanism of the present invention;

[0041] Figure 12 This is a schematic diagram of the distribution of the first clamping frame and the second clamping frame of the present invention;

[0042] Figure 13This is a schematic diagram of the linkage between the first clamping frame and the second clamping frame of the present invention;

[0043] Figure 14 It is a schematic diagram of the second clamping frame of the present invention maintaining stable lifting.

[0044] In the figure: 1. Angle adjustment mechanism; 101. Positioning frame; 102. Positioning gear ring; 103. Clamping block; 104. Fixing slot; 105. Connecting frame; 106. Positioning gear; 107. First motor; 108. Limiting slot; 2. Depth adjustment mechanism; 201. Fixing frame; 202. Mounting frame; 203. Second motor; 204. Lifting frame; 205. Positioning slot; 206. Adjusting gear; 207. Balancing gear; 208. Positioning rack; 209. Pitot tube; 210. Pressure output port; 211. Avoidance frame; 212. First pressure port; 213. Second pressure hole; 214. Avoidance circle; 215. Avoidance pad; 3. Measuring and positioning mechanism; 301. Support frame; 302. Support platform; 303. Adjusting frame; 304. First positioning screw; 305. Moving seat; 306. Moving frame; 307. First clamping frame; 308. Anti-slip pad; 309. Positioning bevel gear; 310. Second positioning screw; 311. Positioning handle; 312. Positioning bevel gear ring; 313. Through hole; 314. Positioning block; 315. Sliding groove; 316. Second clamping frame; 317. Limit rod; 4. Pipe opening. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] The present invention provides a Pitot tube measuring device and a flow velocity measuring method thereof, which can conveniently adjust the angle in a pipeline. The device comprises an angle adjustment mechanism 1 and a pipeline port 4. Figures 1-4 As shown, a depth adjustment mechanism 2 is fixed on one side of the angle adjustment mechanism 1, and a measurement and positioning mechanism 3 is fixed on the other side of the angle adjustment mechanism 1, wherein:

[0047] like Figure 5 、 Figure 6As shown, the angle adjustment mechanism 1 includes a positioning frame 101, a positioning gear ring 102 is fixedly provided at the bottom end of one side of the positioning frame 101, and two positioning gears 106 are meshed with the tooth surface of the positioning gear ring 102. One side of the two positioning gears 106 is rotatably connected to a connecting frame 105, and the bottom end of one side of the connecting frame 105 contacts one side of the inner wall of the positioning gear ring 102. A first motor 107 is fixedly provided on one side of the connecting frame 105, and the output end of the first motor 107 is fixedly connected to the middle position of one of the positioning gears 106;

[0048] like Figure 7-10 As shown, the depth adjustment mechanism 2 includes a fixed frame 201 fixed to one side of the positioning frame 101, a positioning slot 205 is provided in the middle of the fixed frame 201, a lifting frame 204 is slidably provided in the middle of the inner wall of the positioning slot 205, positioning racks 208 are fixed on both sides of the lifting frame 204, and adjustment gears 206 are rotatably provided on both sides of the inner wall of the positioning slot 205, and the tooth surfaces of the two adjustment gears 206 are respectively engaged with the tooth surfaces of the two positioning racks 208. A plurality of Pitot tubes 209 are interspersed in the middle of the lifting frame 204, and the tops of the plurality of Pitot tubes 209 are connected to pressure output holes 210;

[0049] like Figure 7 、 Figure 8 As shown, a balance gear 207 is fixedly provided at the middle position of each of the two adjusting gears 206 through one side of the fixing frame 201, and the tooth surfaces of the two balance gears 207 are meshed with each other. A mounting frame 202 is fixedly provided on one side of the fixing frame 201, and a second motor 203 is fixedly provided on one side of the mounting frame 202. The output end of the second motor 203 is fixedly connected to the middle position of one of the balance gears 207;

[0050] Both ends of the positioning toothed ring 102 are fixed with a clamping block 103, and the bottom end of the positioning toothed ring 102 is provided with a fixing groove 104, and one side of the connecting frame 105 contacts one side of the inner wall of the fixing groove 104;

[0051] like Figure 9 、 Figure 10 As shown, three of the Pitot tubes 209 have a first pressure hole 212 at one end, and a clearance ring 214 is fixed to one side of each of the first pressure holes 212. Another three of the Pitot tubes 209 have a second pressure hole 213 at one side of their outer walls, and a clearance pad 215 is fixed to one end of each of these three Pitot tubes 209. A clearance frame 211 is fixed to the bottom end of the outer wall of the lifting frame 204 near the corner of the Pitot tubes 209.

[0052] The output end of the first motor 107 fixed on one side of the connecting frame 105 drives one of the positioning gears 106 to rotate, and the tooth surfaces of the two positioning gears 106 are meshed with the tooth surfaces of the positioning gear ring 102, so that the two positioning gears 106 drive the connecting frame 105 to rotate through the positioning of the fixed groove 104. The connecting frame 105 is positioned based on the positioning of the measurement positioning mechanism 3, so that it rotates along the cross-sectional center of the pipe opening 4 as the rotation center, which is convenient for rotating the measuring end of the Pitot tube 209 to the corresponding test position, which is beneficial for changing the measurement orientation during measurement intervals, so as to facilitate multiple orientation changes and take average values, improve accuracy, and increase measurement convenience; the output end of the second motor 203 fixed on one side of the mounting frame 202 drives one of the balancing gears 207 to rotate, and the two balancing gears 207 are meshed with each other, so that the two A balance gear 207 drives the two adjusting gears 206 to rotate synchronously in opposite directions, so that the two adjusting gears 206 respectively mesh with the tooth surfaces of the positioning racks 208 fixed on both sides of the lifting frame 204, and through the limitation of the positioning groove 205 provided on the inner wall of the fixed frame 201, the lifting frame 204 drives the measuring end of the Pitot tube 209 to move up and down stably, so as to facilitate the measurement of different depths inside the pipe opening 4, so that pipe diameters of different sizes and liquid heights of different depths can be conveniently measured, thereby increasing the functionality of the Pitot tube measuring device; the liquid flowing on the inner wall of the pipe opening 4 is dynamically and statically pressurized through the first pressure hole 212 and the second pressure hole 213 provided on the outer wall of the Pitot tube 209, and the obtained pressure value is output to the external pressure sensor through the pressure output hole 210, and the flow rate data is read according to the pressure value conversion.

[0053] As a specific embodiment of the present invention, Figure 11-14As shown, the measuring and positioning mechanism 3 includes a support frame 301 fixed to the other side of the positioning frame 101, and an adjustment frame 303 is fixed at both ends of the support frame 301. The bottom ends of the two adjustment frames 303 are connected to the support platform 302, and a through slot is provided in the middle position of the support platform 302. A positioning bevel gear ring 312 is rotatably provided at the top of the support platform 302. A first positioning screw rod 304 is rotatably provided at the middle position of the two adjustment frames 303. One end of the two first positioning screw rods 304 passes through the adjustment frame 303 and is fixed with a positioning bevel gear 309. The tooth surfaces of the two positioning bevel gears 309 are aligned with the positioning bevel gears 309. The tooth surfaces of the helical gear ring 312 are meshed, and one end of the outer wall of the two first positioning screw rods 304 is threaded with a movable seat 305, and one side of the two movable seats 305 is in sliding contact with one side of the inner wall of the two adjustment frames 303 respectively. The bottom ends of the two movable seats 305 are fixed with a movable frame 306, and the bottom ends of the two movable frames 306 are fixed with a first clamping frame 307. The middle position of the support frame 301 is threaded with a second positioning screw rod 310, and the bottom end of the second positioning screw rod 310 is rotatably provided with a second clamping frame 316. The top end of the second positioning screw rod 310 is fixed with a positioning handle 311;

[0054] A through hole 313 is formed in the middle of the helical positioning gear ring 312. Positioning blocks 314 are fixed to the four sides of the inner wall of the through hole 313. Sliding grooves 315 are formed on the four sides of the outer wall of the second positioning screw 310. One end of the outer wall of the four positioning blocks 314 slides in contact with one side of the inner wall of the four sliding grooves 315 respectively.

[0055] A limiting groove 108 is formed on one side of the inner wall of the positioning frame 101. A limiting rod 317 is fixed to one end of the second clamping frame 316. One end of the outer wall of the limiting rod 317 is in sliding contact with one side of the inner wall of the limiting groove 108. Anti-slip pads 308 are fixed to both sides of the first clamping frames 307 and both sides of the second clamping frames 316.

[0056] The two first clamping frames 307 and the second clamping frames 316 are clamped and connected with the pipe opening 4;

[0057] When the second clamping frame 316 is lifted up, the second clamping frame 316 is lifted up and down, and ... The positioning bevel gear ring 312 rotates synchronously, so that the positioning bevel gear 309 engaged with the outer wall of the positioning bevel gear ring 312 stably drives the first positioning screw 304 to rotate, so that the movable seat 305 threadedly connected to the outer wall of the first positioning screw 304 slides along the inner wall of the adjustment frame 303, so that the movable frame 306 fixed at the bottom end of the movable seat 305 drives the first clamping frame 307 to move relative to the contact direction of the pipe opening 4, so that the two first clamping frames 307 and the second clamping frames 316 are opened and closed synchronously, so as to facilitate stable clamping at the inner wall or outer wall of the pipe opening 4. The two first clamping frames 307 and the second clamping frames 316 are clamped in a triangular shape, which makes the installation of the Pitot tube measuring device convenient and improves the installation stability of the Pitot tube measuring device. Due to the adjustability of the two first clamping frames 307 and the second clamping frames 316, the Pitot tube measuring device is convenient for measuring the flow rate of liquid in pipes of different diameters.

[0058] As a specific embodiment of the present invention, an intelligent control panel is fixedly provided on one side of the positioning frame 101 , and the first motor 107 and the second motor 203 are both electrically connected to an external power supply through the intelligent control panel.

[0059] A method for measuring flow velocity in a pipeline using a Pitot tube measuring device with convenient angle adjustment is as follows:

[0060] Step 1: Observe the installation method of the pipe opening 4 to be measured, and insert the two first clamping frames 307 and the second clamping frames 316 of the measurement and positioning mechanism 3 into the outer wall or the inner wall of one end of the pipe opening 4 at the same time;

[0061] The second step is to rotate the positioning handle 311 so that the positioning handle 311 drives the second positioning screw rod 310 to rotate, so that the second positioning screw rod 310 is threadedly raised and lowered along the middle position of the support frame 301, so that the second clamping frame 316 connected to the bottom end of the second positioning screw rod 310 is raised and lowered, and the limiting rod 317 fixed at one end of the second clamping frame 316 is slidably connected to the limiting groove 108 on one side of the inner wall of the positioning frame 101, so that the second clamping frame 316 is stably raised and lowered to contact the inner wall or outer wall of the pipe opening 4;

[0062] When the second clamping frame 316 is lifted or lowered, the sliding groove 315 provided on the outer wall of the second positioning screw rod 310 and the sliding contact of the positioning block 314 make the second positioning screw rod 310 rotate and the positioning bevel gear ring 312 rotate synchronously, so that the positioning bevel gear 309 engaged with the outer wall of the positioning bevel gear ring 312 stably drives the first positioning screw rod 304 to rotate, so that the movable seat 305 threadedly connected to the outer wall of the first positioning screw rod 304 slides along the inner wall of the adjustment frame 303, so that the movable frame 306 fixed at the bottom end of the movable seat 305 drives the first clamping frame 307 to move relative to the contact direction of the pipe opening 4, so that the two first clamping frames 307 and the second clamping frames 316 are opened and closed synchronously for clamping;

[0063] Step 4: The output end of the first motor 107 fixed to one side of the connecting frame 105 drives one of the positioning gears 106 to rotate, and the tooth surfaces of the two positioning gears 106 are meshed with the tooth surfaces of the positioning gear ring 102, so that the two positioning gears 106 drive the connecting frame 105 to rotate through the positioning of the fixed groove 104. The connecting frame 105 is positioned based on the measurement and positioning mechanism 3 so that it rotates along the cross-sectional center of the pipe opening 4 as the rotation center;

[0064] Step 5: The output end of the second motor 203 fixed to one side of the mounting frame 202 drives one of the balancing gears 207 to rotate. The two balancing gears 207 mesh with each other, causing the two balancing gears 207 to drive the two adjusting gears 206 to rotate synchronously in opposite directions. The two adjusting gears 206 respectively mesh with the tooth surfaces of the positioning racks 208 fixed to both sides of the lifting frame 204. The positioning slots 205 provided on the inner wall of the fixing frame 201 limit the lifting frame 204, causing the measuring end of the Pitot tube 209 to move up and down.

[0065] Step 6: The liquid flowing on the inner wall of the pipe opening 4 is subjected to dynamic and static pressure through the first pressure hole 212 and the second pressure hole 213 provided on the outer wall of the Pitot tube 209. The obtained pressure value is output to the external pressure sensor through the pressure output hole 210, and the flow rate data is read according to the pressure value conversion.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Pitot tube measuring device for conveniently adjusting the angle in a pipeline, comprising an angle adjustment mechanism (1), characterized in that: A depth adjustment mechanism (2) is fixedly provided on one side of the angle adjustment mechanism (1), and a measurement and positioning mechanism (3) is fixedly provided on the other side of the angle adjustment mechanism (1), wherein: The angle adjustment mechanism (1) comprises a positioning frame (101), a positioning toothed ring (102) is fixedly provided at the bottom end of one side of the positioning frame (101), two positioning gears (106) are meshed on the tooth surface of the positioning toothed ring (102), one side of the two positioning gears (106) is rotatably connected to a connecting frame (105), the bottom end of one side of the connecting frame (105) contacts one side of the inner wall of the positioning toothed ring (102), a first motor (107) is fixedly provided on one side of the connecting frame (105), and the output end of the first motor (107) is fixedly connected to the middle position of one of the positioning gears (106); The depth adjustment mechanism (2) comprises a fixed frame (201) fixed to one side of the positioning frame (101); a positioning groove (205) is provided in the middle of the fixed frame (201); a lifting frame (204) is slidably provided in the middle of the inner wall of the positioning groove (205); positioning racks (208) are fixed on both sides of the lifting frame (204); adjusting gears (206) are rotatably provided on both sides of the inner wall of the positioning groove (205); the tooth surfaces of the two adjusting gears (206) are respectively engaged with the tooth surfaces of the two positioning racks (208); a plurality of Pitot tubes (209) are interspersed in the middle of the lifting frame (204); and the top ends of the plurality of Pitot tubes (209) are connected to pressure output holes (210).

2. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 1, characterized in that: A balancing gear (207) is fixedly provided at the middle position of each of the two adjusting gears (206) and passes through one side of the fixing frame (201); the tooth surfaces of the two balancing gears (207) are meshed with each other; a mounting frame (202) is fixedly provided at one side of the fixing frame (201); a second motor (203) is fixedly provided at one side of the mounting frame (202); and an output end of the second motor (203) is fixedly connected to the middle position of one of the balancing gears (207).

3. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 1, characterized in that: Both ends of the positioning toothed ring (102) are fixed with clamping blocks (103), the bottom end of the positioning toothed ring (102) is provided with a fixing groove (104), and one side of the connecting frame (105) contacts one side of the inner wall of the fixing groove (104).

4. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 1, characterized in that: One end of three of the Pitot tubes (209) is provided with a first pressure hole (212), and one side of the plurality of first pressure holes (212) is fixedly provided with an avoidance ring (214); one side of the outer wall of the other three of the Pitot tubes (209) is provided with a second pressure hole (213), and one end of the three Pitot tubes (209) is fixedly provided with an avoidance pad (215); and the bottom end of the outer wall of the lifting frame (204) is fixedly provided with an avoidance frame (211) near the corner of the Pitot tube (209).

5. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 1, characterized in that: The measuring and positioning mechanism (3) comprises a support frame (301) fixed on the other side of the positioning frame (101), an adjusting frame (303) is fixedly provided at both ends of the support frame (301), the bottom ends of the two adjusting frames (303) are connected to a support platform (302), a through slot is provided in the middle of the support platform (302), a positioning helical gear ring (312) is rotatably provided at the top end of the support platform (302), a first positioning screw rod (304) is rotatably provided at the middle of the two adjusting frames (303), one end of the two first positioning screw rods (304) passes through the adjusting frame (303) and is fixedly provided with a positioning helical gear (309), the tooth surfaces of the two positioning helical gears (309) are aligned with the positioning frame (303), and the positioning frame (303) is provided with a fixed positioning helical gear (309). The tooth surface of the helical gear ring (312) is meshed, one end of the outer wall of the two first positioning screw rods (304) is threaded with a movable seat (305), one side of the two movable seats (305) is in sliding contact with one side of the inner wall of the two adjustment frames (303), the bottom ends of the two movable seats (305) are fixed with a movable frame (306), the bottom ends of the two movable frames (306) are fixed with a first clamping frame (307), the middle position of the support frame (301) is threaded with a second positioning screw rod (310), the bottom end of the second positioning screw rod (310) is rotatably provided with a second clamping frame (316), and the top end of the second positioning screw rod (310) is fixed with a positioning handle (311).

6. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 5, characterized in that: A through hole (313) is provided in the middle of the positioning helical gear ring (312), and positioning blocks (314) are fixedly provided on the four sides of the inner wall of the through hole (313). Sliding grooves (315) are provided on the four sides of the outer wall of the second positioning screw rod (310), and one end of the outer wall of the four positioning blocks (314) is in sliding contact with one side of the inner wall of the four sliding grooves (315).

7. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 5, characterized in that: A limiting groove (108) is provided on one side of the inner wall of the positioning frame (101), a limiting rod (317) is fixedly provided on one end of the second clamping frame (316), one end of the outer wall of the limiting rod (317) is in sliding contact with one side of the inner wall of the limiting groove (108), and anti-slip pads (308) are fixedly provided on both sides of the first clamping frame (307) and both sides of the second clamping frame (316).

8. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 5, characterized in that: The two first clamping frames (307) and the second clamping frame (316) are snap-connected with the pipeline opening (4).

9. The Pitot tube measuring device for convenient angle adjustment in a pipeline according to claim 2, characterized in that: An intelligent control panel is fixedly provided on one side of the positioning frame (101), and the first motor (107) and the second motor (203) are both electrically connected to an external power supply via the intelligent control panel.

10. A method for measuring flow velocity in a pipeline using a Pitot tube measuring device with convenient angle adjustment, characterized in that: The method is as follows: Step 1: Observe the method for facilitating the installation of the pipe opening (4) to be measured, and simultaneously insert the two first clamping frames (307) and the second clamping frame (316) in the measuring and positioning mechanism (3) into the outer wall or the inner wall of one end of the pipe opening (4); Step 2: Rotate the positioning handle (311) so that the positioning handle (311) drives the second positioning screw rod (310) to rotate, so that the second positioning screw rod (310) is threadedly lifted and lowered along the middle position of the support frame (301), so that the second clamping frame (316) connected to the bottom end of the second positioning screw rod (310) is lifted and lowered, and the limiting rod (317) fixed at one end of the second clamping frame (316) is slidably connected to the limiting groove (108) provided on one side of the inner wall of the positioning frame (101), so that the second clamping frame (316) is stably lifted and lowered to contact the inner wall or outer wall of the pipe opening (4); Step 3: When the second clamping frame (316) is lifted and lowered, the sliding groove (315) on the outer wall of the second positioning screw rod (310) and the sliding contact of the positioning block (314) are provided, so that the second positioning screw rod (310) rotates and the positioning bevel gear ring (312) rotates synchronously, so that the positioning bevel gear (309) engaged with the outer wall of the positioning bevel gear ring (312) stably drives the first positioning screw rod (304) to rotate, so that the moving seat (305) threadedly connected to the outer wall of the first positioning screw rod (304) slides along the inner wall of the adjustment frame (303), so that the moving frame (306) fixed at the bottom end of the moving seat (305) drives the first clamping frame (307) to move in the contact direction relative to the pipe opening (4), so that the two first clamping frames (307) and the second clamping frame (316) are synchronously opened and closed for clamping; Step 4: The output end of the first motor (107) fixed on one side of the connecting frame (105) drives one of the positioning gears (106) to rotate, and the tooth surfaces of the two positioning gears (106) are meshed with the tooth surfaces of the positioning gear ring (102), so that the two positioning gears (106) drive the connecting frame (105) to rotate through the positioning of the fixed groove (104), and the connecting frame (105) is positioned based on the measurement and positioning mechanism (3) so that it rotates along the cross-sectional center of the pipe opening (4) as the rotation center; Step 5: The output end of the second motor (203) fixed on one side of the mounting frame (202) drives one of the balancing gears (207) to rotate, and the two balancing gears (207) are meshed with each other, so that the two balancing gears (207) drive the two adjusting gears (206) to rotate synchronously in opposite directions, so that the two adjusting gears (206) are respectively meshed with the tooth surfaces of the positioning racks (208) fixed on both sides of the lifting frame (204), and the lifting frame (204) drives the measuring end of the Pitot tube (209) to be stably lifted and lowered by limiting the positioning groove (205) provided on the inner wall of the fixing frame (201); Step 6: The liquid flowing on the inner wall of the pipe opening (4) is subjected to dynamic and static pressure through the first pressure hole (212) and the second pressure hole (213) provided on the outer wall of the Pitot tube (209). The obtained pressure value is output to the external pressure sensor through the pressure output hole (210), and the flow rate data is read according to the pressure value conversion.

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