A high-precision multi-channel ultrasonic flowmeter

Abstract

The present invention relates to the field of fluid flow metering technology, specifically, a high-precision multi-channel ultrasonic flowmeter. It includes a flowmeter body, wherein a detection channel is provided inside the flowmeter body, wherein the detection channel includes two connecting channels and a detection section provided between the two connecting channels, wherein the diameter of the detection section is smaller than the diameter of the connecting channel, and a flow detection component is provided inside the detection section; a plurality of connecting pipes are connected between the two connecting channels, wherein the connecting pipes are closable hoses, and the connecting channels and the detection section located at the front side are both provided with pressure gauges. By combining the Venturi flow detection principle and the ultrasonic flow detector, the two perform data calibration after measuring the liquid flow, thereby avoiding large deviations in the detection results and effectively ensuring the accuracy of liquid flow detection.

Description

Technical Field

[0001] The invention relates to the technical field of fluid flow measurement, in particular to a high-precision multi-channel ultrasonic flow meter. Background Art

[0002] Ultrasonic flowmeters have been widely used in industrial flow measurement fields such as large-diameter heat meters and large-diameter water meters. The transducer of large-diameter ultrasonic flowmeters is generally installed at a certain angle to the flow direction of the fluid. However, if the ultrasonic flowmeter is damaged or other influencing factors occur during use, the measurement of the ultrasonic flowmeter will deviate and the detection accuracy will decrease.

[0003] The Venturi flowmeter is a commonly used device for measuring the flow rate of pressurized pipelines. It is installed on the pipeline where the flow rate needs to be measured. Although the Venturi flowmeter does not use ultrasonic flowmeters to measure liquid flow, the liquid flow rate in its contraction section is small. When the liquid flow rate in the pipeline is fast, it is easy to cause the pressure in other positions of the pipeline to increase, affecting the safety of liquid transportation.

[0004] In order to improve the accuracy of liquid flow detection and avoid excessive liquid pressure in the pipeline, the present application provides a high-precision multi-channel ultrasonic flowmeter. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a high-precision multi-channel ultrasonic flowmeter.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a high-precision multi-channel ultrasonic flowmeter, comprising a flowmeter body, a detection channel is arranged inside the flowmeter body, the detection channel comprises two connecting channels and a detection section arranged between the two connecting channels, the diameter of the detection section is smaller than the diameter of the connecting channel, and a flow detection component is arranged inside the detection section;

[0007] A plurality of connecting pipes are connected between the two connecting channels, and the connecting pipes are closable hoses. The connecting channel and the detection section located at the front side are both provided with pressure gauges.

[0008] As an optimization, an auxiliary component is provided on the outside of the detection channel, and the auxiliary component includes a connecting seat, a guide rod and a closing clamp. The connecting seat is fixed to the outer wall of the detection channel, one end of the guide rod is fixedly connected to the connecting seat, and the length direction of the guide rod is arranged along the length direction of the connecting tube. The closing clamp is slidably arranged on the guide rod, and the closing clamp is used to clamp the connecting tube. An auxiliary spring is arranged on the guide rod.

[0009] As an optimization, the closing clamp includes a guide block and two clamping rollers rotatably connected to the guide block. When the two clamping rollers are respectively clamped on both sides of the connecting pipe, the connecting pipe is in a closed state, and the guide block is slidably connected to the guide rod;

[0010] One end of the auxiliary spring connected to the connecting seat is a fixed end, and the other end of the auxiliary spring is a movable end. The diameter of the auxiliary spring gradually decreases from the fixed end to the movable end.

[0011] As an optimization, the connecting pipe includes a straight section and an inclined section, the inclined section is connected to the connecting channel, and the straight section is arranged in parallel with the detection section of the detection channel;

[0012] The maximum distance between the outer end of the connecting seat and the inclined section is greater than the maximum distance between the guide rod and the straight section. When the closing clamp is detached from the straight section, the connecting pipe is in a through state.

[0013] As an optimization, the sum of the flow rates of the plurality of connecting tubes and the flow rate of the detection section is equal to the flow rate of the connecting channel.

[0014] As an optimization, the vertical cross-sectional area of ​​the connecting channel is S1, the flow rate is V1, S1V1=Q1; the vertical cross-sectional area of ​​the detection section is S2, the flow rate is V2, S1V1=S2V2.

[0015] As an optimization, the flow detection component is an ultrasonic flow detector, and the ultrasonic flow detector measures the liquid flow in the detection section as Q2, Q2=S2V2.

[0016] This scheme is a high-precision multi-channel ultrasonic flow meter with the following benefits:

[0017] The flow meter of the present application is internally provided with a detection channel, which combines the Venturi flow detection principle and the ultrasonic flow detector, and performs data calibration after the liquid flow is measured by the two, so as to avoid large deviations in the detection results and effectively ensure the accuracy of liquid flow detection;

[0018] When the liquid pressure inside the detection channel is too high, open the connecting pipe to increase the instantaneous flow inside the flow meter body to avoid damage to the detection equipment and pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axial schematic diagram of the present invention.

[0020] Figure 2 It is an axial schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0022] Figure 4 It is a top view schematic diagram of the internal structure of the present invention.

[0023] Figure 5 It is a left schematic diagram of the internal structure of the present invention.

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the AA section structure.

[0025] Figure 7 For the present invention Figure 5 Schematic diagram of the BB cross-section structure.

[0026] Among them, 1. flow meter body, 2. connecting channel, 3. detection section, 4. connecting pipe, 5. pressure gauge, 6. detection channel, 7. connecting seat, 8. guide rod, 9. auxiliary spring, 10. clamping roller, 11. ultrasonic flow detector. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] The present solution also includes a controller, the position of which is set by the staff according to actual conditions during operation. The controller is used to control the electrical devices used in the present solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication equipment, lights, speakers and microphones; the controller is an Intel processor, an AMD processor, a PLC controller, an ARM processor or a single-chip microcomputer, and the supporting components include a motherboard, a memory stick, a storage medium and a power supply, and the power supply is AC power or a lithium battery; when a display screen is provided, a display card is also provided.

[0029] like Figure 1-Figure 7 As shown, a high-precision multi-channel ultrasonic flowmeter comprises a flowmeter body 1, wherein a detection channel 6 is arranged inside the flowmeter body 1, wherein the detection channel 6 comprises two connecting channels 2 and a detection section 3 arranged between the two connecting channels 2, wherein the diameter of the detection section 3 is smaller than the diameter of the connecting channel 2, and a flow detection component is arranged inside the detection section 3;

[0030] A plurality of connecting pipes 4 are connected between the two connecting channels 2 . The connecting pipes 4 are closable hoses. The connecting channel 2 and the detection section 3 located at the front side are both provided with pressure gauges 5 .

[0031] The detection channel 6 is a venturi tube, and the flow detection component is arranged in the detection section 3 of the detection channel 6, that is, the throat position of the venturi tube.

[0032] like Figure 1 and Figure 2 As shown, an auxiliary component is arranged on the outer side of the detection channel 6, and the auxiliary component includes a connecting seat 7, a guide rod 8 and a closing clamp. The connecting seat 7 is fixed to the outer wall of the detection channel 6, one end of the guide rod 8 is fixedly connected to the connecting seat 7, and the length direction of the guide rod 8 is arranged along the length direction of the connecting tube 4. The closing clamp is slidably arranged on the guide rod 8, and the closing clamp is used to clamp the connecting tube 4. An auxiliary spring 9 is arranged on the guide rod 8.

[0033] When the water pressure inside the detection channel 6 increases, water will flow into the connecting tube 4, pushing the closing clamp to move along the connecting tube 4. When the closing clamp is detached from the connecting tube 4, the connecting tube 4 opens, and the sum of the flow rates of the detection section 3 and multiple connecting tubes 4 is the same as the flow rate of the connecting channel 2.

[0034] like Figure 2 As shown, the closing clamp includes a guide block and two clamping rollers 10 rotatably connected to the guide block. When the two clamping rollers 10 are respectively clamped on both sides of the connecting pipe 4, the connecting pipe 4 is in a closed state, and the guide block is slidably connected to the guide rod 8;

[0035] One end of the auxiliary spring 9 connected to the connecting seat 7 is a fixed end, and the other end of the auxiliary spring 9 is a movable end. The diameter of the auxiliary spring 9 gradually decreases from the fixed end to the movable end.

[0036] When the closing clamp moves along the connecting pipe 4, the guide block moves along the guide rod 8, and the distance between the guide rod 8 and the connecting pipe 4 gradually increases.

[0037] like Figure 1 and Figure 3 As shown, the connecting pipe 4 includes a straight section and an inclined section, the inclined section is connected to the connecting channel 2, and the straight section is arranged parallel to the detection section 3 of the detection channel 6;

[0038] The maximum distance between the outer end of the connecting seat 7 and the inclined section is greater than the maximum distance between the guide rod 8 and the straight section. When the closing clamp is detached from the straight section, the connecting pipe 4 is in a through state.

[0039] The sum of the flow rates of the plurality of connecting tubes 4 and the flow rate of the detection section 3 is equal to the flow rate of the connecting channel 2 .

[0040] The vertical cross-sectional area of ​​the connecting channel 2 is S1, the flow rate is V1, and S1V1=Q1; the vertical cross-sectional area of ​​the detection section 3 is S2, the flow rate is V2, and S1V1=S2V2.

[0041] The flow detection component is an ultrasonic flow detector 11, and the ultrasonic flow detector measures the liquid flow in the detection section 3 as Q2, Q2=S2V2.

[0042] Directions:

[0043] When the device is used, the liquid flow rate inside the detection section 3 is detected by an ultrasonic flow detector to obtain a flow value Q2;

[0044] The liquid pressure in the connecting channel 2 and the detection section 3 is tested by a press machine. The pressure in the connecting channel 2 is measured to be P1, and the pressure in the detection section 3 is measured to be P2. According to the Venturi tube flow calculation formula, S1V1=S2V2=Q1=Q2;

[0045] V12 / 2+P1 / ρ=V22 / 2+P2 / ρ;

[0046] The cross-sectional area S1 of the connecting channel 2 and the cross-sectional area S2 of the detection section 3 are known;

[0047]

[0048] According to the aforementioned measured pressure and the cross-sectional area S1 of the connecting channel 2 and the cross-sectional area S2 of the detection section 3, the flow rate Q in the detection channel 6 can be calculated based on formula (I);

[0049] The liquid flow rate V1 (1) inside the connecting channel 2 can be calculated by formula (I);

[0050] According to V2 measured by the ultrasonic flow detector 11, based on formula (III), the liquid flow rate V1 (2) inside the connecting channel 2 can be obtained;

[0051] A certain allowable error value is set by the controller, and V1 (1) and V1 (2) are compared. When the error between the two is less than the set error value, it means that the equipment is operating well. The average value of the measured value can be taken to ensure the accuracy of the flow meter detection.

[0052] When the difference between V1 (1) and V1 (2) is greater than the set error value, the surface pressure gauge 5 or the ultrasonic flow detector 11 fails and the equipment needs to be repaired in time.

[0053] When the hydraulic pressure inside the detection channel 6 increases, the liquid flows into the connecting tube 4, pushing the clamping roller 10 to move along the connecting tube 4. When the clamping roller 10 is detached from the connecting tube 4, the sum of the cross-sectional area of ​​the entire connecting tube 4 and the cross-sectional area of ​​the detection section 3 is the same as the cross-sectional area of ​​the detection channel 6. At this time, V2=V1, that is, Q=S1V2.

[0054] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any high-precision multi-channel ultrasonic flowmeter that conforms to the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in any corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. A high-precision multi-channel ultrasonic flowmeter, comprising a flowmeter body (1), characterized in that: A detection channel (6) is provided inside the flow meter body (1), the detection channel (6) comprises two connecting channels (2) and a detection section (3) arranged between the two connecting channels (2), the diameter of the detection section (3) is smaller than the diameter of the connecting channel (2), and a flow detection component is provided inside the detection section (3); A plurality of connecting pipes (4) are connected between the two connecting channels (2), the connecting pipes (4) being closable hoses, and the connecting channels (2) and the detection section (3) located at the front side are both provided with pressure gauges (5); An auxiliary component is arranged on the outer side of the detection channel (6), and the auxiliary component comprises a connecting seat (7), a guide rod (8) and a closing clamp. The connecting seat (7) is fixed to the outer wall of the detection channel (6), one end of the guide rod (8) is fixedly connected to the connecting seat (7), the length direction of the guide rod (8) is arranged along the length direction of the connecting pipe (4), the closing clamp is slidably arranged on the guide rod (8), and the closing clamp is used to clamp the connecting pipe (4), and an auxiliary spring (9) is arranged on the guide rod (8); The closing clamp comprises a guide block and two clamping rollers (10) rotatably connected to the guide block. When the two clamping rollers (10) are respectively clamped on two sides of the connecting pipe (4), the connecting pipe (4) is in a closed state, and the guide block is slidably connected to the guide rod (8); One end of the auxiliary spring (9) connected to the connecting seat (7) is a fixed end, and the other end of the auxiliary spring (9) is a movable end. The diameter of the auxiliary spring (9) gradually decreases from the fixed end to the movable end.

2. A high-precision multi-channel ultrasonic flowmeter according to claim 1, characterized in that: The connecting pipe (4) comprises a straight section and an inclined section, the inclined section is connected to the connecting channel (2), and the straight section is arranged in parallel with the detection section (3) of the detection channel (6); The maximum distance between the outer end of the connecting seat (7) and the inclined section is greater than the maximum distance between the guide rod (8) and the straight section. When the closing clamp is detached from the straight section, the connecting pipe (4) is in a through state.

3. A high-precision multi-channel ultrasonic flowmeter according to claim 1, characterized in that: The sum of the flow rates of the plurality of connecting tubes (4) and the flow rate of the detection section (3) is equal to the flow rate of the connecting channel (2).

4. A high-precision multi-channel ultrasonic flowmeter according to claim 1, characterized in that: The vertical cross-sectional area of ​​the connecting channel (2) is S1, the flow rate is V1, S1V1=Q1, Q1 is the liquid flow rate inside the connecting channel (2); the vertical cross-sectional area of ​​the detection section (3) is S2, the flow rate is V2, S1V1=S2V2.

5. A high-precision multi-channel ultrasonic flowmeter according to claim 4, characterized in that: The flow detection component is an ultrasonic flow detector (11), and the ultrasonic flow detector measures the liquid flow in the detection section (3) as Q2, where Q2=S2V2.

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