Anti-vibration high-precision progressive vortex flowmeter

Abstract

The application discloses an anti-shock high-precision vortex flowmeter, and relates to the technical field of flowmeters.The anti-shock high-precision vortex flowmeter comprises a vortex generator, a Venturi structure, a desolver, a lens, a laser generator, a light sensor and a shock mirror.The fluid is rotated by the vortex generator, and stable vortexes are formed by the Venturi structure; the laser light passes through the lens to detect the vortex frequency so as to measure the flow rate.The shock mirror cooperates with a spring to monitor the environmental shock, and the top light sensor receives the change of the reflected light to correct the data.The second pressure sensor is forced by the vortex generator to judge the flow rate in an emergency, and the reliability in a complex environment is ensured.

Description

Technical Field

[0001] This invention relates to the field of flow meter technology, specifically to a shock-resistant, high-precision vortex flow meter. Background Technology

[0002] In the field of industrial fluid measurement, vortex flow meters are widely used because they can measure flow velocity by detecting the precession frequency of vortices. Traditional vortex flow meters typically rely on mechanical sensors to detect the fluid rotation characteristics. Vortex flow meters are sensitive to vibrations in the installation environment. In industrial settings, the operation of mechanical equipment is often accompanied by vibrations, which can interfere with mechanical components and lead to a decrease in measurement accuracy. Secondly, existing flow meters can cause overall vibration in high-velocity or complex fluids, which can also interfere with mechanical components. Finally, existing flow meters lack adaptability to different fluid characteristics and environmental conditions. For example, fluid rotation can affect downstream equipment. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a high-precision, shock-resistant vortex flowmeter, comprising a vortex generating tube, a venturi structure on the inner wall of the vortex generating tube (the venturi structure is a recessed structure), a deswirl deflector fixedly mounted at one end of the vortex generating tube, two symmetrically arranged lenses between the deswirl deflector and the venturi structure, two coaxially arranged flat-bottomed grooves on the lenses, and the two lenses being embedded in the main body of the vortex generating tube along the tangent of the inner wall of the vortex generating tube; a vortex initiator is mounted at the end of the vortex generating tube away from the deswirl deflector, the vortex initiator being used to drive the fluid to rotate; a laser generator is mounted on one side of the vortex generating tube, and two light sensors are mounted on the other side of the vortex generating tube, wherein the light emitted by the laser generator is split into two beams proportionally by a beam splitter, one beam of light passes through the two lenses and is received by a light sensor at the bottom, and the other beam of light is reflected by a vibrating reflector with adjustable angle to a light sensor at the top, for monitoring environmental vibration.

[0004] Preferably, the vibrating reflector is fixedly installed at one end of the spring, and the other end of the spring is fixedly installed at the ball head. A lever is fixedly installed on the ball head. The ball head is movably mounted on the ball head mounting seat using a ball joint mounting method. A screw is also threaded onto the ball head mounting seat. The screw is used to fix the ball head to the ball head mounting seat.

[0005] Preferably, two light sensors are fixedly mounted on a light sensor mounting plate. The light sensor mounting plate, the light beam splitter, the laser generator, and the ball head mounting base are all fixedly mounted on a bottom mounting light shield. An internal protective light shield is fixedly mounted on the side of the bottom mounting light shield. The bottom mounting light shield and the internal protective light shield are both fixedly and sealed on the outer surface of the eddy current generating tube. Two lenses are positioned between the bottom mounting light shield and the internal protective light shield.

[0006] Preferably, the vortex generator is fixedly installed on the inner wall of the vortex generating tube, and the end of the vortex generating tube near the vortex generating tube is slidably sleeved on the vortex generating tube. The opposite ends of the vortex generating tube and the vortex generating tube are provided with stepped grooves that can be sleeved on each other. A convex ring is fixedly sleeved on the end face of the stepped groove on the vortex generating tube, and a first pressure sensor is provided in contact between the convex ring and the vortex generating tube.

[0007] Preferably, a front-end fixed pipe is slidably sleeved at the end of the vortex generating tube away from the vortex generating tube, and the front-end fixed pipe and the opposite end of the vortex generating tube are provided with stepped grooves that can be interlocked.

[0008] Preferably, flanges are fixedly installed at the opposite ends of the vortex generator pipe and the front-end fixed pipe.

[0009] Preferably, the front-end fixed pipe and the vortex generating pipe are fixedly installed together by a mounting sleeve, and the mounting sleeve is set outside the vortex generating pipe, so that the gap between the vortex generating pipe and the front-end fixed pipe and the vortex generating pipe is inside the mounting sleeve.

[0010] Preferably, a second pressure sensor support arm is fixedly installed on the outer surface of the front fixed pipe or the inner wall of the fixed sleeve, and an auxiliary extrusion block is fixedly installed on the outer surface of the swirl generator. A second pressure sensor is provided in contact between the auxiliary extrusion block and the opposite surface of the second pressure sensor support arm, wherein the circumferential tangential force direction of the swirl generator is the same as the force direction of the second pressure sensor.

[0011] Preferably, an outer protective light shield is fitted on the outside of the bottom-mounted light shield and the inner protective light shield. The outer protective light shield is fixedly and sealed on the outer surface of the eddy current generating tube. The outer protective light shield has a window, and a window cover is magnetically sealed at the window. The position of the window cover corresponds to the position of the lever.

[0012] Preferably, a lens protection ring is also fixedly installed on the outer surface of the vortex generating tube and sleeved on the outside of the two lenses. The lens protection ring is used to prevent the two lenses from separating from the vortex generating tube under pressure.

[0013] Compared with the prior art, the present invention has the following advantages: (1) The present invention realizes real-time monitoring of environmental vibration through a vibrating reflector and a spring structure. When the installation environment vibrates, the vibrating reflector shakes with the spring, changing the angle of the reflected light, which causes the light signal received by the top light sensor to change; (2) The present invention uses a laser generator and a light sensor, and ensures that the light passes through the fluid perpendicularly through the flat-bottomed groove on the lens, reducing scattering and refraction errors. The recessed design of the Venturi structure enhances the stability of eddy current formation, making the eddy current precession frequency easier to detect. The bottom light sensor accurately captures the eddy current frequency through the change of light signal intensity, realizing high-precision flow velocity measurement. By detecting the eddy current precession frequency through light, the impact of external vibration environment on the equipment is greatly reduced; (3) The present invention uses a lever and ball head structure, and the user can adjust the angle of the vibrating reflector before installation to adapt to different environmental requirements. After adjustment, the ball head position is fixed by screws to ensure stability. This flexible design does not require long-term calibration by professionals, reducing the difficulty of installation and maintenance costs. Compared with the complex debugging process of the traditional flow meter fixed structure, it has significant advantages. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the external protective light shield structure of the present invention.

[0016] Figure 3 This is a diagram showing the installation location of the light sensor of the present invention.

[0017] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0018] Figure 5 This is a diagram showing the lens mounting position for the present invention.

[0019] Figure 6 This is a schematic diagram of the internal structure of the mounting and fixing sleeve of the present invention.

[0020] Figure 7 This is a schematic diagram of the lens structure of the present invention.

[0021] Figure 8 This is a schematic diagram of the vortex generator tube structure of the present invention.

[0022] In the diagram: 101-Eddy current generator; 102-External protective light shield; 103-Window cover; 104-Bottom-mounted light shield; 105-Internal protective light shield; 106-Laser generator; 107-Ball head mount; 108-Ball head; 109-Lever; 110-Screw; 111-Spring; 112-Vibrating reflector; 113-Light sensor mounting plate; 114-Light sensor; 115-Light beam splitter ; 116-Flange; 117-Lens protective collar; 118-Lens; 119-Flat-bottomed groove; 120-Spinning de-rotator; 121-Front-end fixed pipe; 122-Spinning generating tube; 123-Protruding ring; 124-First pressure sensor; 125-Mounting and fixing sleeve; 126-Second pressure sensor support arm; 127-Second pressure sensor; 128-Auxiliary extrusion block; 129-Venturi structure; 130-Spinning de-rotator. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-8 The technical solution of the present invention will be further illustrated through specific embodiments.

[0024] This invention provides a high-precision, earthquake-resistant vortex flowmeter, comprising a vortex generating tube 101, an inner wall of which is provided with a Venturi structure 129, the Venturi structure 129 being a recessed structure, a deswirl deflector 120 fixedly disposed at one end of the vortex generating tube 101, and two symmetrically arranged lenses 118 disposed between the deswirl deflector 120 and the Venturi structure 129, each lens 118 having two coaxially arranged flat-bottomed grooves 119, the two lenses 118 being embedded in the main body of the vortex generating tube 101 along the tangent of the inner wall of the vortex generating tube 101; the vortex generating tube 101 is located away from the deswirl deflector. One end of the device 120 is provided with a swirl starter 130, which is used to drive the fluid to rotate; a laser generator 106 is provided on one side of the vortex generating tube 101, and two light sensors 114 are provided on the other side of the vortex generating tube 101. The light emitted by the laser generator 106 is split into two beams by a beam splitter 115. One beam passes through two lenses 118 and is received by a light sensor 114 at the bottom. The other beam is reflected by a vibrating reflector 112 with adjustable angle and onto a light sensor 114 at the top, which is used to monitor the environmental vibration. Vibrating reflector 112 is fixedly installed on one end of spring 111, and the other end of spring 111 is fixedly installed on ball head 108. A lever 109 is fixedly installed on ball head 108. Ball head 108 is movably mounted on ball head mounting seat 107 using a ball joint mounting method. Screw 110 is also threaded on ball head mounting seat 107. Screw 110 is used to fix ball head 108 on ball head mounting seat 107. Two light sensors 114 are fixedly mounted on the light sensor mounting plate 113. The light sensor mounting plate 113, the light beam splitter 115, the laser generator 106, and the ball head mounting base 107 are all fixedly mounted on the bottom mounting light shield 104. An internal protective light shield 105 is fixedly mounted on the side of the bottom mounting light shield 104. The bottom mounting light shield 104 and the internal protective light shield 105 are both fixedly and sealed on the outer surface of the eddy current generating tube 101. Two lenses 118 are located between the bottom mounting light shield 104 and the internal protective light shield 105.

[0025] A vortex generator 130 is fixedly installed on the inner wall of a vortex generating tube 122. The end of the vortex generating tube 122 closest to the vortex generating tube 101 is slidably fitted onto the vortex generating tube 101. The opposite ends of the vortex generating tube 101 and the vortex generating tube 122 are provided with interlocking stepped grooves. A protruding ring 123 is fixedly fitted onto the end face of the stepped groove on the vortex generating tube 101, and a first pressure sensor 124 is disposed in contact with the protruding ring 123 and the vortex generating tube 122. A front-end fixed pipe 121 is slidably fitted onto the end of the vortex generating tube 122 furthest from the vortex generating tube 101. The opposite ends of the front-end fixed pipe 121 and the vortex generating tube 122 are provided with interlocking stepped grooves. Flanges 116 are fixedly installed at the opposite ends of both the vortex generating tube 101 and the front-end fixed pipe 121. The front-end fixed pipe 121 and the vortex generating pipe 101 are fixedly installed together by a mounting and fixing sleeve 125. The mounting and fixing sleeve 125 is located outside the vortex generating pipe 122, so that the gap between the vortex generating pipe 122 and the front-end fixed pipe 121 and the vortex generating pipe 101 is inside the mounting and fixing sleeve 125. A second pressure sensor support arm 126 is fixedly installed on the outer surface of the front-end fixed pipe 121 or on the inner wall of the mounting and fixing sleeve 125. An auxiliary extrusion block 128 is fixedly installed on the outer surface of the vortex generating pipe 122. A second pressure sensor 127 is disposed in contact between the auxiliary extrusion block 128 and the opposite surface of the second pressure sensor support arm 126. The circumferential tangential force direction of the vortex generator 130 is the same as the force direction of the second pressure sensor 127. An outer protective light shield 102 is fitted over the bottom of the light shield 104 and the inner protective light shield 105. The outer protective light shield 102 is fixedly and sealed onto the outer surface of the eddy current generating tube 101. The outer protective light shield 102 has a window, and a window cover 103 is magnetically sealed at the window. The position of the window cover 103 corresponds to the position of the lever 109. A lens protective collar 117 is also fixedly installed on the outer surface of the eddy current generating tube 101, which is fitted over the two lenses 118. The lens protective collar 117 is used to prevent the two lenses 118 from separating from the eddy current generating tube 101 under pressure.

[0026] The working principle of the anti-vibration high-precision vortex flowmeter disclosed in this invention is as follows: Two flanges 116 are connected in series in the pipe to be measured. The outer surface of the external protective light shield 102 is provided with an indicator arrow pointing upwards. The side without an arrow should indicate the flow direction of the fluid. When the fluid (generally a liquid) passes through the vortex initiator 130, it rotates. Due to the concave structure of the Venturi structure 129, the fluid rotation becomes increasingly faster, thus forming a vortex. In the diffusion section of the Venturi structure 129, the vortex deflects due to the fluid's swirling motion, resulting in vortex precession (the fluid itself forms a vortex, and the center of the vortex rotates around the center of the pipe). Because the frequency of vortex precession is very high, the actual vortex is a spiral shape. The rotation frequency of this vortex is proportional to the fluid velocity; therefore, only the rotation frequency of the vortex needs to be detected. Air bubbles will be present in the vortex (or the fluid density will change). Under normal circumstances (without eddies), the light emitted by the laser generator 106 passes through the beam splitter 115, lens 118, the fluid, and then through another lens 118 (the flat-bottomed groove 119 is designed to ensure that the light can be perpendicularly irradiated by the lens 118 and then perpendicularly exited from the lens 118), finally irradiating a light sensor 114 at the bottom. Because the density of the fluid inside the eddy current generating tube 101 changes due to the eddies, the refractive index of the light after passing through the fluid also changes. This will cause a change in the intensity of the light signal received by the bottom light sensor 114. Therefore, the rotation frequency of the eddy current can be determined by the frequency of the intensity change of the light signal received by the bottom light sensor 114, thereby determining the flow velocity of the fluid inside the eddy current generating tube 101. Since the laser generator 106 and the light sensor 114 vibrate along with the pipe, the vibration has little impact on the detection results.

[0027] When the installation environment vibrates, the vibrating reflector 112 mounted on the spring 111 will shake. (Due to different installation angles, before use, the swing angle of the ball head 108 needs to be adjusted using the lever 109 so that the ball head 108 drives the vibrating reflector 112 to swing via the spring 111, allowing the reflected light from the beam splitter 115 to reach the top light sensor 114. Finally, rotate the screw 110 to fix the ball head 108 to the ball head mounting base 107.) The shaking of the vibrating reflector 112 changes the angle between it and the reflected light from the beam splitter 115, thus changing the angle at which the vibrating reflector 112 reflects the light. At this time, the light will be deflected, causing the vibrating reflector 112 to fail to reflect the light to the top light sensor 114. By detecting the change in light intensity at the top light sensor 114, it can be determined whether there is vibration in the environment. At this point, the fluid flow rate is determined by measuring the resistance of the second pressure sensor 127. This is compared to the flow rate measured at the bottom light sensor 114. When the fluid passes through the vortex generator 130, it applies a circumferential rotational force. This force is transmitted to the vortex generating tube 122, which then applies force to the auxiliary extrusion block 128. The auxiliary extrusion block 128 then extrudes the second pressure sensor 127. This extrusion force is proportional to the fluid flow rate. Therefore, the fluid flow rate can be determined by detecting the resistance of the second pressure sensor 127 (the value may fluctuate depending on the direction of vibration; only the intermediate value is used as a reference). The deswirl deflector 120 on the vortex generating tube 101 is used to eliminate the fluid rotation caused by the vortex generator 130, preventing the rotating fluid from affecting subsequent equipment.

Claims

1. A shock resistant high accuracy progressing vortex flowmeter characterized by: The vortex generating tube (101) is provided with a Venturi structure (129) on the inner wall, the Venturi structure (129) is a retracted structure, one end of the vortex generating tube (101) is fixedly provided with a desolver (120), two symmetrical lenses (118) are arranged between the desolver (120) and the Venturi structure (129), the two lenses (118) are coaxially provided with two flat-bottom grooves (119), and the two lenses (118) are embedded and installed on the vortex generating tube (101) along the tangent position of the inner wall of the vortex generating tube (101); The vortex generating tube (101) is provided with a vortex generator (130) away from the desolver (120), and the vortex generator (130) is used for driving the fluid to rotate; One side of the vortex generating tube (101) is provided with a laser generator (106), and the other side of the vortex generating tube (101) is provided with two light sensors (114), wherein the light emitted by the laser generator (106) is equally divided into two beams of light by a light beam splitter (115), one of the two beams of light passes through the two lenses (118) and is received by the bottom light sensor (114), and the other beam of light is reflected to the top light sensor (114) through the angle-adjustable vibration mirror (112), and is used for monitoring the environmental vibration condition; The vibration mirror (112) is fixedly installed on one end of the spring (111), the other end of the spring (111) is fixedly installed on the ball head (108), the ball head (108) is fixedly installed with a lever (109), and the ball head (108) is movably arranged on the ball head mounting seat (107) in a ball pair manner, and a screw (110) is threadedly installed on the ball head mounting seat (107), and the screw (110) is used for fixing the ball head (108) on the ball head mounting seat (107); The two light sensors (114) are fixedly installed on the light sensor mounting plate (113), the light sensor mounting plate (113), the light beam splitter (115), the laser generator (106) and the ball head mounting seat (107) are fixedly installed on the bottom mounting light shield (104), the side surface of the bottom mounting light shield (104) is fixedly installed with an internal protection light shield (105), and the bottom mounting light shield (104) and the internal protection light shield (105) are fixedly and sealingly sleeved on the outer surface of the vortex generating tube (101), and the two lenses (118) are arranged between the bottom mounting light shield (104) and the internal protection light shield (105).

2. The shock resistant high accuracy precession vortex flowmeter of claim 1 wherein: The spinning device (130) is fixedly installed on the inner wall of the spinning generation pipe (122), the spinning generation pipe (122) is slidably sleeved on the vortex generation pipe (101) near one end of the vortex generation pipe (101), and the opposite ends of the vortex generation pipe (101) and the spinning generation pipe (122) are provided with stepped grooves capable of being sleeved with each other, wherein the end face of the stepped groove on the vortex generation pipe (101) is fixedly sleeved with a convex ring (123), and the first pressure sensor (124) is arranged in contact between the convex ring (123) and the spinning generation pipe (122).

3. The shock-proof high-precision precession vortex flowmeter according to claim 2, characterized in that: The end of the spinning generation pipe (122) away from the vortex generation pipe (101) is slidably sleeved with a front end fixed pipe (121), and the opposite ends of the front end fixed pipe (121) and the spinning generation pipe (122) are provided with stepped grooves capable of being sleeved with each other.

4. The shock-proof high-precision precession vortex flowmeter according to claim 3, characterized in that: The opposite ends of the vortex generation pipe (101) and the front end fixed pipe (121) are fixedly installed with flanges (116).

5. The shock-proof high-precision precession vortex flowmeter according to claim 4, characterized in that: The front end fixed pipe (121) and the vortex generation pipe (101) are fixedly installed through the installation fixed sleeve (125), and the installation fixed sleeve (125) is arranged outside the spinning generation pipe (122), so that the gap between the spinning generation pipe (122) and the front end fixed pipe (121) and the vortex generation pipe (101) is arranged inside the installation fixed sleeve (125).

6. The shock-proof high-precision precession vortex flowmeter according to claim 5, characterized in that: The outer surface of the front end fixed pipe (121) or the inner wall of the installation fixed sleeve (125) is fixedly installed with a second pressure sensor supporting arm (126), the outer surface of the spinning generation pipe (122) is fixedly installed with an auxiliary extrusion block (128), the second pressure sensor (127) is arranged in contact between the opposite surfaces of the auxiliary extrusion block (128) and the second pressure sensor supporting arm (126), and the circumferential tangent force direction of the spinning device (130) is the same as the force direction of the second pressure sensor (127).

7. The shock-proof high-precision precession vortex flowmeter according to claim 6, characterized in that: The outer side of the bottom-mounted light shield (104) and the internal protection light shield (105) is sleeved with an external protection light shield (102), the external protection light shield (102) is fixedly and sealingly sleeved on the outer surface of the vortex generation pipe (101), the external protection light shield (102) is provided with a window, the window is magnetically and sealingly provided with a window cover (103), and the position of the window cover (103) corresponds to the position of the lever (109).

8. The shock-proof high-precision precession vortex flowmeter according to claim 7, characterized in that: The outer surface of the vortex generation pipe (101) is also fixedly installed with a lens protection sleeve ring (117) sleeved outside the two lenses (118), and the lens protection sleeve ring (117) is used for preventing the two lenses (118) from being separated from the vortex generation pipe (101) under the action of pressure.

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