A vibration-resistant vortex flowmeter

Abstract

The present invention discloses a vibration-resistant vortex flowmeter, which relates to the technical field of flowmeters. The present invention detects flow rate through vortexes and pressure changes, maintaining high measurement accuracy even in external vibration environments. By providing an adjustable pressure ring and a deformable rubber ring, optimized detection is achieved in low-flow-velocity environments. Furthermore, an electromagnetic restriction structure is designed to prevent misoperation, while dynamically adjusting the flow rate to improve adaptability and measurement reliability. The present invention is applicable to various flow ranges and exhibits particular advantages in vibration environments and low-flow-velocity conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of flowmeters, in particular to a vibration-resistant vortex flowmeter. Background Art

[0002] In the prior art, traditional vortex flowmeters mainly determine the fluid velocity and flow rate by monitoring the vibration frequency of the vortex generator. When the fluid flows through the vortex generator, vortices are generated alternately on both sides, and the vortex generation frequency is linearly related to the flow rate. Traditional equipment uses a vibration sensor to record the vibration frequency of the vortex generator and converts the vibration frequency into flow data through signal processing. However, this detection method has a significant defect in application: it is highly sensitive to external vibrations. Because the vibration of the vortex generator is not only affected by the generation of vortexes, but also by external factors such as mechanical vibrations in the pipeline environment, resonance generated by the operation of surrounding equipment, and vibrations conducted from the ground. These non-fluid factors may cause the signal captured by the sensor to be distorted, causing the measurement results to deviate from the actual flow rate. Especially when the vibration frequency is close to the vortex frequency, the interference is particularly obvious. Summary of the Invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a vibration-resistant vortex flowmeter, comprising an intermediate pipe, a vortex generator is provided at the center position inside the intermediate pipe, the vortex generator is arranged along the radial direction of the intermediate pipe, and a connecting circular hole is also opened on the intermediate pipe, a vibration frequency monitoring component is fixedly and sealed at the connecting circular hole, and the vibration frequency monitoring component is used to monitor and display the vibration frequency of the vortex generator; two parallel arranged detection pressure tubes are provided on the side of the vortex generator, the two detection pressure tubes are fixedly installed on the sealing plug, and an embedded groove hole is also opened on the intermediate pipe, wherein the sealing plug is fixedly sealed in the embedded groove hole, and the bottom ends of the two detection pressure tubes are arranged at the center of the intermediate pipe.

[0004] Preferably, two balancing pressure tubes are inserted and embedded in the intermediate pipe, one end of the two balancing pressure tubes is located inside the intermediate pipe and is flush with the inner wall surface of the intermediate pipe. The balancing pressure tube is the same as the inside of the intermediate pipe. The two balancing pressure tubes are fixed on the balancing pressure tube bracket. The two balancing pressure tubes and the two detection pressure tubes are arranged one by one. A piston rod is inserted in a sliding seal at the opposite ends of each two corresponding balancing pressure tubes and the detection pressure tube. The outer side of the balancing pressure tube bracket and the balancing pressure tube is provided with a protective shell, which is fixed on the intermediate pipe.

[0005] Preferably, a pressure plate is fixed in the middle of the two piston rods, and the upper and lower surfaces of the two pressure plates are both equipped with pressure sensors. A pressure sensor limiting frame is also fixed on the middle pipe. The pressure sensor limiting frame wraps the four pressure sensors to limit the displacement of the pressure plates so that the pressure sensors are in contact and cooperate with the pressure sensor limiting frame.

[0006] Preferably, connecting sealing rings are fixed at both ends of the intermediate pipe, a flange is fixedly installed on the side of the connecting sealing ring through an adjusting pressure ring, a deformable rubber ring is fixedly sealed on the inner side of the adjusting pressure ring, and each adjusting pressure ring is fixedly connected to a pressure delivery pipe, the two pressure delivery pipes are connected by a three-way connecting pipe, and a flow regulating valve is arranged in series on each pressure delivery pipe.

[0007] Preferably, an adjusting cylinder is fixedly installed on the intermediate pipe through an adjusting cylinder bracket, an extrusion piston is provided with a sliding seal on the inner wall of the adjusting cylinder, a screw rod is fixed at an eccentric position on the side of the extrusion piston, the screw rod is slidably installed on a screw rod supporting sliding plate, the screw rod supporting sliding plate is fixed on the adjusting cylinder, and an air vent is also provided on the screw rod supporting sliding plate, and the interior of the adjusting cylinder is communicated with the interior of the three-way connecting pipe.

[0008] Preferably, a first gear ring limiting ring is fixed at the circumference of the screw supporting the sliding plate, a center nut gear is threadedly sleeved on the screw, a sealing buckle cover is fixedly installed on the first gear ring limiting ring, and the first gear ring and the second gear ring are rotatably installed on the inner sides of the sealing buckle cover and the first gear ring limiting ring respectively.

[0009] Preferably, the first gear ring and the second gear ring are meshed with the center nut gear through a plurality of planetary gears, and all the planetary gears are rotatably mounted on a planetary gear support plate, which is rotatably arranged between the first gear ring and the second gear ring, and a permanent magnetic limiting block is embedded in the planetary gear support plate.

[0010] Preferably, the sealing buckle cover is in sliding cooperation with the screw rod, an electromagnet is fixed on the sealing buckle cover, the electromagnet is in sliding cooperation with the screw rod, and the electromagnet is in magnetic cooperation with the permanent magnetic limiting block.

[0011] Preferably, an adjusting motor is fixedly mounted on the adjusting cylinder, and the output shaft of the adjusting motor is coupled with the first gear ring and the second gear ring via a transmission belt.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention forms a pressure difference between the detection pressure tube and the balance pressure tube, and detects the fluid flow rate and flow rate in combination with a pressure sensor, thereby effectively avoiding the influence of pipeline vibration on the flow detection accuracy. The change in vibration frequency will not interfere with the change in the resistance value of the pressure sensor, thereby achieving stable and reliable flow measurement; (2) The present invention automatically reduces the flow aperture when the flow rate is low by adjusting the linkage between the pressure ring and the deformable rubber ring, thereby increasing the flow rate of the fluid through the vortex generator, thereby enhancing the intensity of the vortex signal and improving the detection accuracy, and is particularly suitable for measurement in low flow rate environments; (3) The present invention adds an electromagnet to cooperate with a permanent magnetic limit block to prevent the planetary gear bracket disk from rotating incorrectly. Only when the electromagnet is energized will the adjustment device operate normally, avoiding adjustment errors caused by misoperation, thereby protecting the equipment and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the internal structure of the protective shell of this invention.

[0015] Figure 3 This is a structural schematic diagram of the deformable rubber ring of the present invention.

[0016] Figure 4 It is a structural schematic diagram of the regulating cylinder of the present invention.

[0017] Figure 5 This is a structural diagram of the pressure pipe detection part of the present invention.

[0018] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A in the middle.

[0019] Figure 7 It is a structural schematic diagram of the piston rod of the present invention.

[0020] Figure 8 This is a diagram showing the relative positions of the vortex generator and two detection pressure tubes of the present invention.

[0021] In the figure: 101-intermediate pipe; 102-protective housing; 103-vibration frequency monitoring component; 104-balance pressure pipe bracket; 105-balance pressure pipe; 106-detection pressure pipe; 107-sealing plug; 108-embedded groove hole; 109-vortex generator; 110-connecting circular hole; 111-piston rod; 112-pressure plate; 113-pressure sensor; 114-pressure sensor limit frame; 115-adjustment cylinder bracket; 116-adjustment cylinder; 117-flange; 118-adjustment pressure ring; 1 19-pressure delivery pipe; 120-deformable rubber ring; 121-connecting sealing ring; 122-flow regulating valve; 123-three-way connecting pipe; 124-extrusion piston; 125-electromagnet; 126-sealing buckle cover; 127-screw; 128-planetary gear; 129-transmission belt; 130-first gear ring; 131-planetary gear support plate; 132-permanent magnet limit block; 133-screw support sliding plate; 134-first gear ring limit ring; 135-center nut gear; 136-second gear ring; 137-regulating motor. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0023] The present invention provides a vibration-resistant vortex flowmeter, comprising an intermediate pipe 101. A vortex generator 109 is provided at the center of the intermediate pipe 101. The vortex generator 109 is arranged along the radial direction of the intermediate pipe 101, and a connecting circular hole 110 is also provided on the intermediate pipe 101. A vibration frequency monitoring component 103 is fixedly and sealedly provided at the connecting circular hole 110. The vibration frequency monitoring component 103 is used to monitor and display the vibration frequency of the vortex generator 109; two parallel detection pressure tubes 106 are provided on the side of the vortex generator 109. The two detection pressure tubes 106 are fixedly installed on a sealing plug 107. An embedded groove hole 108 is also provided on the intermediate pipe 101, wherein the sealing plug 107 is fixedly sealed in the embedded groove hole 108. The bottom ends of the two detection pressure tubes 106 are arranged at the center of the intermediate pipe 101. Two balancing pressure tubes 105 are also inserted and embedded in the intermediate pipe 101. One end of the two balancing pressure tubes 105 is located inside the intermediate pipe 101 and is flush with the inner wall surface of the intermediate pipe 101. The balancing pressure tube 105 is the same as the inside of the intermediate pipe 101. The two balancing pressure tubes 105 are fixed on the balancing pressure tube bracket 104. The two balancing pressure tubes 105 and the two detection pressure tubes 106 are arranged in a one-to-one correspondence. A piston rod 111 is slidingly sealed and inserted in the opposite ends of each two corresponding balancing pressure tubes 105 and the detection pressure tube 106. The outer side of the balancing pressure tube bracket 104 and the balancing pressure tube 105 is provided with a protective shell 102, and the protective shell 102 is fixed on the intermediate pipe 101. A pressure plate 112 is fixed to the middle of each piston rod 111. Pressure sensors 113 are installed on the upper and lower surfaces of both pressure plates 112. A pressure sensor limit frame 114 is also fixed to the intermediate pipe 101. The pressure sensor limit frame 114 encloses the four pressure sensors 113 and is used to limit the displacement of the pressure plates 112, so that the pressure sensors 113 contact and cooperate with the pressure sensor limit frame 114. Connecting sealing rings 121 are fixed to both ends of the intermediate pipe 101. A flange 117 is fixedly mounted on the side of the connecting sealing ring 121 through an adjustable pressure ring 118. A deformable rubber ring 120 is fixedly sealed on the inside of the adjustable pressure ring 118. Each adjustable pressure ring 118 is fixedly connected to a pressure delivery pipe 119. The two pressure delivery pipes 119 are connected by a three-way connecting pipe 123. Each pressure delivery pipe 119 is also connected in series with a flow control valve 122.

[0024] An adjustment cylinder 116 is fixedly mounted on the intermediate pipe 101 via an adjustment cylinder bracket 115. An extrusion piston 124 is slidably and sealably mounted on the inner wall of adjustment cylinder 116. A screw 127 is fixed eccentrically to the side of extrusion piston 124. Screw 127 is slidably mounted on a screw support sliding plate 133, which is fixed to adjustment cylinder 116 and has a vent hole. The interior of adjustment cylinder 116 communicates with the interior of three-way connecting pipe 123. A first geared retaining ring 134 is fixed to the circumference of screw support sliding plate 133. A center nut gear 135 is threadedly mounted on screw 127. A sealing buckle cover 126 is fixedly mounted on the first geared retaining ring 134. A first geared ring 130 and a second geared ring 136 are rotatably mounted on the inner sides of sealing buckle cover 126 and first geared retaining ring 134, respectively. The first and second gear rings 130, 136, and the center nut gear 135 are meshed with a plurality of planetary gears 128. All of the planetary gears 128 are rotatably mounted on a planetary gear support plate 131, which is rotatably disposed between the first and second gear rings 130, 136. A permanent magnetic limit block 132 is embedded within the planetary gear support plate 131. A sealing buckle cover 126 slides with a lead screw 127. An electromagnet 125 is fixed to the sealing buckle cover 126, which slides with the lead screw 127 and magnetically engages with the permanent magnetic limit block 132. An adjustment motor 137 is fixed to the adjustment cylinder 116. The output shaft of the adjustment motor 137 is coupled to the first and second gear rings 130, 136 via a transmission belt 129.

[0025] The operating principle of the vibration-resistant vortex flowmeter disclosed in the present invention is as follows: Two flanges 117 of the device are installed in series in the pipeline where the flow rate needs to be measured. When fluid passes through the intermediate pipe 101, the fluid flows through the vortex generator 109, and then alternately forms vortices on both sides of the vortex generator 109. The frequency of the two adjacent vortices is proportional to the flow rate. When the vortex is generated, the vortex generator 109 itself vibrates. Therefore, the vibration frequency monitoring component 103 monitors the vibration frequency of the vortex generator 109, thereby monitoring the flow rate and flow rate of the fluid. When the pipeline where the flow rate needs to be measured is vibrating, the vibration frequency will have a certain impact on the vortex generator 109, thereby affecting the flow rate detection accuracy. In this case, the frequency of the resistance change of the corresponding pressure sensors 113 on the two pressure plates 112 can be measured. This is because when the fluid passes through the vortex generator 109, vortices are alternately generated behind the vortex generator 109. The flow velocity at the vortex is different from the flow velocity of the fluid at other locations, so the pressure at the vortex will change. The detection pressure pipe 106 and the balance pressure pipe 105 are both connected to the interior of the intermediate pipe 101, and the inner diameters of the detection pressure pipe 106 and the balance pressure pipe 105 are the same. Therefore, the pressure inside the detection pressure pipe 106 and the balance pressure pipe 105 is in a balanced state. When the vortex passes through the detection pressure pipe 106 (vortex generator 109), the pressure inside the detection pressure pipe 106 and the balance pressure pipe 105 is in a balanced state. 9 is shorter than the inner diameter of the intermediate pipe 101 to prevent eddy currents from forming in certain locations and affecting the balancing pressure pipe 105. This will change the pressure inside the detection pressure pipe 106, causing an imbalance in the pressures inside the balancing pressure pipe 105 and the detection pressure pipe 106. At this point, the piston rod 111 will be subjected to an axial force. The pressure plate 112 fixed to the piston rod 111 will transmit this force to the pressure sensor 113, thereby applying pressure to the pressure sensor 113, causing the resistance value of the pressure sensor 113 to change. Because this method detects flow rate through pressure changes, vibration will not affect measurement accuracy.

[0026] When the fluid flow rate decreases, the regulating motor 137 can be activated. The output shaft of the regulating motor 137 drives the first and second gear rings 130 and 136 to rotate via the transmission belt 129. The first and second gear rings 130 and 136 drive the center nut gear 135 to rotate via the planetary gears 128. The center nut gear 135 drives the screw rod 127 to move along its own axial direction, thereby pushing the extrusion piston 124 to slide within the regulating cylinder 116, changing the pressure within the regulating cylinder 116. The pressure is transmitted to the two pressure delivery pipes 119 via the three-way connecting pipe 123, thereby changing the pressure within the regulating pressure ring 118. When the pressure within the regulating pressure ring 118 increases, it pushes up the deformable rubber ring 120 (similar to the action of blowing up a balloon). At this time, the inner diameter of the deformable rubber ring 120 decreases, thereby reducing the aperture of the flange 117, thereby increasing the flow rate. When the fluid enters the intermediate pipe 101, it obtains a higher flow rate, thereby improving the detection accuracy of the vortex generator 109 at low flow rates. The regulating pressure ring 118 is provided with a pressure sensor for detecting pressure changes inside the regulating pressure ring 118, and further detecting the deformation of the deformed rubber ring 120. The pressure inside the corresponding regulating pressure ring 118 is individually adjusted by the provided flow regulating valve 122. Before this, the electromagnet 125 needs to be activated. The electromagnet 125 generates a magnetic force to magnetically constrain the permanent magnetic limit block 132, thereby limiting the rotation of the planetary gear support plate 131. If the planetary gear support plate 131 cannot rotate, the planetary gear 128 cannot revolve. At this time, power can be smoothly transmitted from the regulating motor 137 to the center nut gear 135. If the electromagnet 125 is not energized, even if the regulating motor 137 is activated, the pressure inside the regulating cylinder 116 will not change because the center nut gear 135 cannot rotate. This prevents accidental touch.

Claims

1. A vibration-resistant vortex flowmeter, characterized in that: The invention comprises an intermediate pipe (101), wherein a vortex generator (109) is provided at a central position inside the intermediate pipe (101), the vortex generator (109) is arranged along the radial direction of the intermediate pipe (101), and a communicating circular hole (110) is also provided on the intermediate pipe (101), and a vibration frequency monitoring component (103) is fixedly and sealedly provided at the communicating circular hole (110), and the vibration frequency monitoring component (103) is used to monitor and display the vibration frequency of the vortex generator (109); Two parallel detection pressure tubes (106) are provided on the side of the vortex generating body (109), and the two detection pressure tubes (106) are fixedly mounted on the sealing plug (107). An embedded groove hole (108) is also provided on the middle pipe (101), wherein the sealing plug (107) is fixedly sealed in the embedded groove hole (108), and the bottom ends of the two detection pressure tubes (106) are arranged at the center of the middle pipe (101); Two balancing pressure tubes (105) are also inserted and embedded in the middle pipe (101). One end of the two balancing pressure tubes (105) is located inside the middle pipe (101) and is flush with the inner wall surface of the middle pipe (101). The balancing pressure tube (105) is the same as the inner surface of the middle pipe (101). The two balancing pressure tubes (105) are fixed on the balancing pressure tube bracket (104). The two balancing pressure tubes (105) and the two detection pressure tubes (106) are arranged in a one-to-one correspondence. The piston rod (111) is inserted into the opposite end of each two corresponding balancing pressure tubes (105) and the detection pressure tube (106) in a sliding seal. The balancing pressure tube bracket (104) is fixed on the balancing pressure tube bracket (104). The outer sides of the frame (104) and the balance pressure pipe (105) are covered with a protective shell (102), and the protective shell (102) is fixed on the middle pipe (101); the middle parts of the two piston rods (111) are fixed with pressure plates (112), and the upper and lower surfaces of the two pressure plates (112) are both contacted with pressure sensors (113). A pressure sensor limiting frame (114) is also fixed on the middle pipe (101), and the pressure sensor limiting frame (114) wraps the four pressure sensors (113) and is used to limit the displacement of the pressure plates (112), so that the pressure sensors (113) are in contact with the pressure sensor limiting frame (114); Both ends of the intermediate pipe (101) are fixed with connecting sealing rings (121), and a flange (117) is fixedly installed on the side of the connecting sealing ring (121) through an adjusting pressure ring (118). A deformable rubber ring (120) is fixedly sealed on the inner side of the adjusting pressure ring (118), and each adjusting pressure ring (118) is fixedly connected to a pressure delivery pipe (119). The two pressure delivery pipes (119) are connected through a three-way connecting pipe (123), and a flow regulating valve (122) is provided in series on each pressure delivery pipe (119).

2. The vibration-resistant vortex flowmeter according to claim 1, characterized in that: An adjusting cylinder (116) is fixedly mounted on the intermediate pipe (101) via an adjusting cylinder bracket (115). An extrusion piston (124) is provided on the inner wall of the adjusting cylinder (116) in a sliding and sealing manner. A screw rod (127) is fixed at an eccentric position on the side of the extrusion piston (124). The screw rod (127) is slidably mounted on a screw rod support sliding plate (133). The screw rod support sliding plate (133) is fixed on the adjusting cylinder (116). An air vent is also provided on the screw rod support sliding plate (133). The interior of the adjusting cylinder (116) is communicated with the interior of the three-way connecting pipe (123).

3. The vibration-resistant vortex flowmeter according to claim 2, characterized in that: A first toothed ring limiting ring (134) is fixed to the circumference of the screw supporting sliding plate (133), a central nut gear (135) is threadedly sleeved on the screw (127), a sealing buckle cover (126) is fixedly mounted on the first toothed ring limiting ring (134), and a first toothed ring (130) and a second toothed ring (136) are rotatably mounted on the inner sides of the sealing buckle cover (126) and the first toothed ring limiting ring (134), respectively.

4. The vibration-resistant vortex flowmeter according to claim 3, characterized in that: The first gear ring (130) and the second gear ring (136) are meshed with the center nut gear (135) through a plurality of planetary gears (128), and all the planetary gears (128) are rotatably mounted on a planetary gear support disk (131). The planetary gear support disk (131) is rotatably arranged between the first gear ring (130) and the second gear ring (136), and a permanent magnetic limiting block (132) is embedded in the planetary gear support disk (131).

5. The vibration-resistant vortex flowmeter according to claim 4, characterized in that: The sealing buckle cover (126) is slidably matched with the screw rod (127), an electromagnet (125) is fixed on the sealing buckle cover (126), the electromagnet (125) is slidably matched with the screw rod (127), and the electromagnet (125) is magnetically matched with the permanent magnetic limiting block (132).

6. The vibration-resistant vortex flowmeter according to claim 5, characterized in that: An adjusting motor (137) is fixedly mounted on the adjusting cylinder (116), and an output shaft of the adjusting motor (137) is coupled with the first gear ring (130) and the second gear ring (136) via a transmission belt (129).

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