The use of ultrasound to measure the flow rate of water is now a relatively broad technique. Usually, in the process of actually measuring the flow rate, the liquid will flow through the pipe when there is laminar flow, transitional flow or turbulent flow, and is affected by the wall of the pipe. The liquid flow velocity at each point of the same cross section in the tube is quite different. This will affect the accurate measurement of the liquid flow rate to a certain extent. The stability of the flow velocity affects the accuracy of the flow measurement to a great extent. In some flow control accuracy requirements In high places, the unstable state of the flow rate should be eliminated to ensure that the water meter is accurate and reliable. Therefore, a rectified water meter is required.
There is no limit to creativity, and instrumentation is invented. In view of the above, in order to overcome the shortcomings of the existing technology, today [instrumentation] has introduced a utility model patent authorized by the country - a water meter with a rectifier.
The water meter was invented by Chongqing Weishore Instrument Manufacturing Co., Ltd. and was authorized on August 20, 2014.
Specific instructions:
A water meter with a rectifier includes a meter head, a flow tube and an ultrasonic transducer, wherein two flow conversion holes are opened on the flow tube, and the ultrasonic waves are installed in both of the power conversion holes. The transducer is mounted on the flow tube and the two ultrasonic transducers are connected with the meter head. The main points are: a rectifier is installed in the flow tube, and the rectifier is two. Two rectifiers are respectively provided corresponding to the two ultrasonic transducers, and the rectifier includes a shunt plate, one end of the shunt plate is obliquely connected with the sound beam reflector, and the ultrasonic transducer and the sound are The beam reflector corresponds, and the sound beam emitted by the ultrasonic transducer is reflected on the acoustic beam reflector.
The remarkable effect of this technical solution is that two ultrasonic transducers installed on the flow tube are used to collect and send ultrasonic waves in the direction of water flow to measure the flow velocity of the water, and a rectifier is added to the flow tube of the water meter for rectification, wherein the flow of the rectifier is divided. The plate is used to divide the flow of water and divide the flow. After the flow is divided by the flow dividing plate, the liquid is evenly divided into multiple strands. After the unstable state of the liquid flowing through the flow dividing plate is regulated by the multiple flow dividing plates, multiple liquids are collected again. By synthesizing a liquid, the unstable state of the liquid is well eliminated, and rectification is performed. An obliquely-connected acoustic beam reflector is used to reflect ultrasonic waves.
There are at least three shunt plates mentioned above. The insides of the shunt plates are connected. The included angles between the adjacent shunt plates are equal. One end of the shunt plate is obliquely connected to the same acoustic beam reflector. The center of the reflector is located on the centerline where the plurality of distributors intersect. The rectifier provided by this design is regular in shape, symmetrical in structure, and has good shunt effect.
The number of the above-mentioned flow diverter plates is four, and the cross-sections of the four flow diverter plates after the connection are “10†structures. With the above technical solution, the excess of the manifold will increase the pressure loss, while the rectifier plate will have less rectification effect if the manifold is too small. The rectifier composed of the four manifolds can better meet the rectification requirements.
The projection of the acoustic beam reflector in the direction of the center line intersecting the diverter plate is a circle, and the radius of the circle is smaller than the internal hole radius of the flow tube. In this design, the projection of the acoustic beam reflector in the direction of the centerline is a circle to ensure that the liquid is smoothly merged after flowing out of the manifold; and the radius of the projection circle is smaller than the diameter of the projection of the manifold in the direction of the centerline The length is to ensure that the rectifier has a liquid outflow channel.
The acoustic beam reflection surface of the acoustic beam reflector is a plane, and the other surface is an outwardly convex arc surface. The arc surface is connected to the diverter plate, and an angle between the acoustic beam reflection surface and the center line is θ. ,43.5°≤θ≤45°. The curved surface of the acoustic beam reflector in the above scheme can ensure the smooth outflow of the liquid, and the plane can be used to reflect the flow velocity and ultrasonic waves.
The diverter plate is integrally formed with the acoustic beam reflector. With this solution, the diverter plate and the acoustic beam reflector are integrally formed, and the rectifier can be obtained through a die, which is convenient in production and has good connection reliability.
A linear transition between the end of the splitter plate near the acoustic beam reflector and the acoustic beam reflector. With this design, the rectifier is easy to install.
Advantageous effect: A water meter with a rectifier according to the above technical scheme can divide and regularize the water flow in the water flow tube of the water meter, eliminate the unstable state of the water flow, and reduce the difference in flow velocity at each point of the same section, thereby increasing the water meter. Determine the accuracy of the flow.
For further understanding of the invention, the patent specification can be downloaded for detailed understanding. Download address: http://img63.ybzhan.cn/5/20140821/635442307868086610197.pdf
Past: [Instrumental invention] Three-phase high-precision multi-function energy meter [Invention of the instrument] Self-rectifying wedge-shaped flow meter [Invention of the invention] The gas flow meter [Invention of the invention] The integrated orifice flow meter Instrument invented] gas meter control valve structure
There is no limit to creativity, and instrumentation is invented. In view of the above, in order to overcome the shortcomings of the existing technology, today [instrumentation] has introduced a utility model patent authorized by the country - a water meter with a rectifier.
The water meter was invented by Chongqing Weishore Instrument Manufacturing Co., Ltd. and was authorized on August 20, 2014.
A water meter with a rectifier includes a meter head, a flow tube and an ultrasonic transducer, wherein two flow conversion holes are opened on the flow tube, and the ultrasonic waves are installed in both of the power conversion holes. The transducer is mounted on the flow tube and the two ultrasonic transducers are connected with the meter head. The main points are: a rectifier is installed in the flow tube, and the rectifier is two. Two rectifiers are respectively provided corresponding to the two ultrasonic transducers, and the rectifier includes a shunt plate, one end of the shunt plate is obliquely connected with the sound beam reflector, and the ultrasonic transducer and the sound are The beam reflector corresponds, and the sound beam emitted by the ultrasonic transducer is reflected on the acoustic beam reflector.
The remarkable effect of this technical solution is that two ultrasonic transducers installed on the flow tube are used to collect and send ultrasonic waves in the direction of water flow to measure the flow velocity of the water, and a rectifier is added to the flow tube of the water meter for rectification, wherein the flow of the rectifier is divided. The plate is used to divide the flow of water and divide the flow. After the flow is divided by the flow dividing plate, the liquid is evenly divided into multiple strands. After the unstable state of the liquid flowing through the flow dividing plate is regulated by the multiple flow dividing plates, multiple liquids are collected again. By synthesizing a liquid, the unstable state of the liquid is well eliminated, and rectification is performed. An obliquely-connected acoustic beam reflector is used to reflect ultrasonic waves.
There are at least three shunt plates mentioned above. The insides of the shunt plates are connected. The included angles between the adjacent shunt plates are equal. One end of the shunt plate is obliquely connected to the same acoustic beam reflector. The center of the reflector is located on the centerline where the plurality of distributors intersect. The rectifier provided by this design is regular in shape, symmetrical in structure, and has good shunt effect.
The number of the above-mentioned flow diverter plates is four, and the cross-sections of the four flow diverter plates after the connection are “10†structures. With the above technical solution, the excess of the manifold will increase the pressure loss, while the rectifier plate will have less rectification effect if the manifold is too small. The rectifier composed of the four manifolds can better meet the rectification requirements.
The projection of the acoustic beam reflector in the direction of the center line intersecting the diverter plate is a circle, and the radius of the circle is smaller than the internal hole radius of the flow tube. In this design, the projection of the acoustic beam reflector in the direction of the centerline is a circle to ensure that the liquid is smoothly merged after flowing out of the manifold; and the radius of the projection circle is smaller than the diameter of the projection of the manifold in the direction of the centerline The length is to ensure that the rectifier has a liquid outflow channel.
The acoustic beam reflection surface of the acoustic beam reflector is a plane, and the other surface is an outwardly convex arc surface. The arc surface is connected to the diverter plate, and an angle between the acoustic beam reflection surface and the center line is θ. ,43.5°≤θ≤45°. The curved surface of the acoustic beam reflector in the above scheme can ensure the smooth outflow of the liquid, and the plane can be used to reflect the flow velocity and ultrasonic waves.
The diverter plate is integrally formed with the acoustic beam reflector. With this solution, the diverter plate and the acoustic beam reflector are integrally formed, and the rectifier can be obtained through a die, which is convenient in production and has good connection reliability.
A linear transition between the end of the splitter plate near the acoustic beam reflector and the acoustic beam reflector. With this design, the rectifier is easy to install.
Advantageous effect: A water meter with a rectifier according to the above technical scheme can divide and regularize the water flow in the water flow tube of the water meter, eliminate the unstable state of the water flow, and reduce the difference in flow velocity at each point of the same section, thereby increasing the water meter. Determine the accuracy of the flow.
For further understanding of the invention, the patent specification can be downloaded for detailed understanding. Download address: http://img63.ybzhan.cn/5/20140821/635442307868086610197.pdf
Past: [Instrumental invention] Three-phase high-precision multi-function energy meter [Invention of the instrument] Self-rectifying wedge-shaped flow meter [Invention of the invention] The gas flow meter [Invention of the invention] The integrated orifice flow meter Instrument invented] gas meter control valve structure
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