CN110512690B - Flow divider for independent metering and partitioning of water supply pipe network - Google Patents
Flow divider for independent metering and partitioning of water supply pipe network Download PDFInfo
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- CN110512690B CN110512690B CN201910837260.7A CN201910837260A CN110512690B CN 110512690 B CN110512690 B CN 110512690B CN 201910837260 A CN201910837260 A CN 201910837260A CN 110512690 B CN110512690 B CN 110512690B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000000638 solvent extraction Methods 0.000 title abstract description 8
- 230000002441 reversible effect Effects 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 230000001154 acute effect Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000013316 zoning Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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Abstract
A flow divider for independent metering and partitioning of a water supply network belongs to the technical field of flow division of the water supply network. The invention is respectively constructed aiming at the diversion design and the flow metering design of the existing water supply pipeline, and the construction difficulty is high; and the problem of consistent metering time cannot be guaranteed. Ultrasonic transducers are arranged on the wall of a branch pipeline of an n-channel shunt pipe body, the two ultrasonic transducers are positioned on two sides of the corresponding branch pipeline, acute included angles between the ultrasonic transducers and the wall of the branch pipeline are both 45 degrees, and the axes of the two ultrasonic transducers are overlapped and intersected with the axis of the branch pipeline; the control box is used for controlling the forward transmitting transducer on each branch pipeline to transmit signals in the forward direction and controlling the reverse transmitting transducer to receive signals; then the backward transmitting transducer is controlled to transmit signals in the backward direction, and the forward transmitting transducer receives the signals; and finally, calculating to obtain the liquid flow in each branch pipeline corresponding to the middle moment. The invention is used for measuring the flow of the water supply pipe network.
Description
Technical Field
The invention relates to a flow divider for independent metering and partitioning of a water supply network, belonging to the technical field of flow division of the water supply network.
Background
With the acceleration of the urbanization process, the water demand of residents is increasing day by day; the water supply system provides higher requirements for ensuring the water use of users and the stable operation of a water supply network. Wherein, the leakage control of the water supply network is taken as the main problem of the operation of the pipe network and is increasingly paid attention by the water service department.
In the existing pipe network leakage control method, a method of independently metering partitions (DMA) is widely applied. DMA divides a large and complex pipe network system into a plurality of small and simple independent areas by a method of breaking up the whole into parts, measures the water quantity of a water distribution pipe which is shunted to enter the independent areas or flows out of the independent areas, and carries out flow analysis to quantify the leakage level, thereby accurately determining where to leak the leakage so as to carry out active leakage control. The ultrasonic flowmeter is widely used in DMA as a common metering device.
The existing flow dividing and flow measuring design for a water supply pipeline is implemented respectively, namely, the flow dividing design is firstly carried out, and then a flow meter is arranged at a corresponding position. When the number of the flow meters installed when the water supply pipeline is initially laid can not meet the metering requirement of the current DMA at the flow diversion position, the flow meters need to be additionally arranged. The road surface needs be excavated at the scene to add the flowmeter, consequently has the big problem of the construction degree of difficulty, and this one side can influence normal traffic, and on the other hand has still increased construction cost.
In addition, the flow diversion design of the water supply network is usually to arrange T-shaped or cross-shaped pipes in the pipe network, so that three pipes or four pipes are connected to the same node. These pipes that distribute traffic at the same node are the focus of traffic monitoring in DMA. The flow measurement of each T-shaped or cross-shaped pipeline needs to be realized through a plurality of ultrasonic flow meters, the flow meters in the prior art exist independently, each flow meter needs to be provided with a flow meter data processing unit independently, and therefore each flow meter data processing unit also exists independently, so that the consistency of the control of the flow meter at the measurement time is difficult to guarantee, and the accuracy of measurement and analysis is influenced.
Therefore, in order to overcome the above disadvantages, it is necessary to provide a new type of flow divider, which provides a water supply network with a flow metering function at the same time of flow dividing construction, and ensures consistency of flow metering time.
Disclosure of Invention
The diversion design and the flow metering design of the existing water supply pipeline are respectively constructed, and the construction difficulty is high when metering facilities are required to be additionally installed subsequently; and each metering design is independent respectively, and the problem that the metering time of metering data is consistent cannot be ensured.
The invention relates to a flow divider for independent metering and partitioning of a water supply network, which comprises an n-channel flow dividing pipe body, an ultrasonic transducer and a control box,
two ultrasonic transducers are arranged on each branch pipeline wall of at least n-1 branch pipelines of the n-channel shunt pipe body, the two ultrasonic transducers are positioned on two sides of the corresponding branch pipeline, acute included angles between the ultrasonic transducers and the branch pipeline walls are both 45 degrees, and the axes of the two ultrasonic transducers are overlapped and intersected with the axis of the branch pipeline;
taking the ultrasonic transducer close to the node on the wall of each branch pipeline as a forward transmitting transducer, and taking the ultrasonic transducer far away from the node as a reverse transmitting transducer;
the control box is arranged on the outer wall of the n-channel shunt pipe body; the control box is used for controlling the forward transmitting transducer on each branch pipeline to transmit signals in the forward direction and controlling the reverse transmitting transducer to receive signals; then the backward transmitting transducer is controlled to transmit signals in the backward direction, and the forward transmitting transducer receives the signals; then respectively obtaining the forward propagation time and the backward propagation time of the liquid in each branch pipeline according to signals transmitted by the two ultrasonic transducers on each branch pipeline, and finally calculating to obtain the liquid flow in each branch pipeline corresponding to the middle moment; the intermediate time is the median of a time period formed from the forward intermediate time to the reverse intermediate time; the forward middle time is the median of the start and stop time of the forward propagation process; the reverse middle time is the median of the start and stop time of the reverse propagation process, and n is an integer greater than or equal to 3.
According to the flow divider for the independent metering and partitioning of the water supply network, the n-channel flow dividing pipe body is a three-channel flow dividing pipe body, and ultrasonic transducers are arranged on the walls of at least two branch pipes of the three-channel flow dividing pipe body.
According to the flow divider for the independent metering and partitioning of the water supply network, the n-channel flow dividing pipe body is a four-channel flow dividing pipe body, and ultrasonic transducers are arranged on the walls of at least three branch pipes of the four-channel flow dividing pipe body.
According to the flow divider for the independent metering subarea of the water supply network, the flange is arranged at each branch pipeline port of the n-channel flow dividing pipe body.
According to the water supply pipe network independent metering partition flow divider, the ultrasonic transducer is connected with the wall of the branch pipeline through the transducer interface arranged on the branch pipeline, and the ultrasonic transducer and the transducer interface are sealed by the rubber strip.
According to the water supply pipe network independent metering partition flow divider, the control box comprises a power supply interface and an energy converter wiring port, and the power supply interface is used for being connected with commercial power; the transducer wiring port is used as a signal transmission interface of the ultrasonic transducer.
According to the water supply network independent metering and partitioning flow divider, the control box further comprises a data processing unit, the data processing unit comprises a microcontroller, a signal transmitting circuit, an electronic switching circuit, a signal amplifying circuit and a time measuring circuit,
the microcontroller is used for controlling the electronic switch circuit to execute the forward ultrasonic transmission circuit or the reverse ultrasonic transmission circuit, then controlling the signal transmitting circuit to generate a transmitting electric signal, the transmitting electric signal enters the forward transmitting transducer on each branch pipeline through the forward ultrasonic transmission circuit of the electronic switch circuit or enters the reverse transmitting transducer on each branch pipeline through the reverse ultrasonic transmission circuit of the electronic switch circuit, the corresponding transmitting transducer converts the transmitting electric signal into an ultrasonic signal and then is received by the corresponding other ultrasonic transducer, the other ultrasonic transducer converts the received ultrasonic signal into a receiving electric signal, the receiving electric signal enters the signal amplifying circuit through the electronic switch circuit to be amplified, the obtained amplified signal is received by the time measuring circuit, and the time measuring circuit records the time of receiving the amplified signal, and the microcontroller obtains forward and reverse ultrasonic wave propagation time corresponding to the two ultrasonic transducers on each branch pipeline according to the sending time of the transmitted electric signal and the receiving time of the amplified signal, and further calculates and obtains the liquid flow in each branch pipeline corresponding to the middle time.
According to the water supply network independent metering partition flow divider, the data processing unit further comprises a memory, and the memory is used for storing liquid flow data transmitted by the microcontroller.
According to the water supply network independent metering partition flow divider, the data processing unit further comprises a wireless signal transmitter, and the wireless signal transmitter is used for transmitting liquid flow data transmitted by the storage to the measurement and control terminal.
According to the flow divider for the independent metering subarea of the water supply pipe network, the distance between the ultrasonic transducer and the node or the outer port of the n-channel flow dividing pipe body is at least 10D, and D is the inner diameter of the branch pipe.
The invention has the beneficial effects that: the flow divider can be used as a pipeline accessory, and integrates the functions of flow dividing and flow metering. The split-flow type liquid flow meter realizes the integrated installation of the split-flow device and the metering device, namely, each split-flow pipe body is simultaneously provided with the ultrasonic transducer for liquid flow metering, the installation procedure is simplified, the split type field construction installation required when the metering device is insufficient is avoided, and the construction efficiency is improved.
The invention adopts a set of control equipment to control and process data aiming at the ultrasonic transducers on all branch pipelines of the shunt pipe body, thereby reducing the repeated use of the equipment and being beneficial to reducing the cost. Meanwhile, under the control of the control box, the branch pipelines on the same node of the shunt tube body can be subjected to flow measurement at the same time, and the time consistency of the flow measurement is ensured.
Drawings
FIG. 1 is a schematic structural view of a four-way flow divider body of the flow divider for independent metering and zoning of a water supply network;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a cross-sectional view A-A of FIG. 1;
FIG. 5 is a schematic structural view of a three-way flow divider of the present invention for independent metering and zoning of a water supply network; ultrasonic transducers are arranged on the walls of three branch pipelines of the three-way shunt pipe body in the figure;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a left side view of FIG. 5;
FIG. 8 is a cross-sectional view B-B of FIG. 5;
fig. 9 is an exemplary block diagram of a data processing unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
First embodiment, referring to fig. 1 to 9, the present invention provides a flow divider for independent metering and zoning of a water supply network, comprising an n-channel flow dividing pipe body 100, an ultrasonic transducer 200 and a control box 300,
two ultrasonic transducers 200 are arranged on each branch pipeline wall of at least n-1 branch pipelines of the n-channel shunt pipe body 100, the two ultrasonic transducers 200 are positioned on two sides of the corresponding branch pipelines, acute included angles between the ultrasonic transducers 200 and the branch pipeline walls are both 45 degrees, and the axes of the two ultrasonic transducers 200 are overlapped and intersected with the axes of the branch pipelines;
the ultrasonic transducer 200 close to the node on the wall of each branch pipeline is used as a forward transmitting transducer, and the ultrasonic transducer 200 far away from the node is used as a reverse transmitting transducer;
the control box 300 is arranged on the outer wall of the n-channel shunt tube body 100; the control box 300 is used for controlling the forward transmitting transducer on each branch pipeline to transmit signals in the forward direction and controlling the reverse transmitting transducer to receive signals; then the backward transmitting transducer is controlled to transmit signals in the backward direction, and the forward transmitting transducer receives the signals; then respectively obtaining the forward propagation time and the backward propagation time of the liquid in each branch pipeline according to signals transmitted by the two ultrasonic transducers on each branch pipeline, and finally calculating to obtain the liquid flow in each branch pipeline corresponding to the middle moment; the intermediate time is the median of a time period formed from the forward intermediate time to the reverse intermediate time; the forward middle time is the median of the start and stop time of the forward propagation process; the reverse middle time is the median of the start and stop time of the reverse propagation process, and n is an integer greater than or equal to 3.
The embodiment provides a flow divider capable of simultaneously dividing a water supply network and measuring flow, and the flow of liquid passing through each branch pipeline can be measured by simultaneously arranging two ultrasonic transducers 200; the acute included angles between the ultrasonic transducer 200 and the wall of the branch pipeline are 45 degrees, because cosine values of the included angles are needed in flow calculation, and the complexity of the calculation process can be greatly reduced by selecting 45 degrees. In practical implementation, other suitable angles of included angle may also meet the setting requirements. The two ultrasonic transducers 200 on the same branch pipeline are arranged to have coincident axes, because the ultrasonic waves are transmitted along a straight line, the axes of the two transducers need to be ensured to be on the same straight line. The axis is intersected with the axis of the branch pipeline, the passing axis section of the ultrasonic wave passing through the branch pipe can be ensured, and the flow velocity of the section can be used as the average flow velocity of liquid in the straight pipe. If the other interface is not axial, the calculated flow value is too large or too small.
The control box 300 can control the ultrasonic transducer through a corresponding control assembly and an execution circuit, so as to realize the flow measurement of liquid in each branch pipeline, and the control box 300 can be set to be square. It respectively controls the two ultrasonic transducers 200 on each branch pipeline in the forward and reverse directions. And calculating to obtain flow data once every time forward and reverse control is performed.
A control box interface may be preset on the outer wall of the n-channel shunt tube body 100, so as to realize the connection between the control box 300 and the n-channel shunt tube body 100.
All branch pipes of the n-channel shunt pipe body 100 should be in the same horizontal plane, and at this time, the control box 300 is usually connected with the n-channel shunt pipe body 100 from above the horizontal plane, and the connection can be performed by welding.
The n-channel manifold body 100 may have three branch lines or four branch lines, or may have more branch lines.
This embodiment has carried out the integrated design with flow measurement and reposition of redundant personnel function, has avoided because of both install simultaneously, causes the problem that the road surface was excavated repeatedly. For newly planned water supply pipelines, after the flow divider is installed, the flow dividing positions have the metering function at the same time, so that the condition that metering equipment needs to be additionally installed is avoided, the construction steps are reduced, and the construction time is saved.
As an example, referring to fig. 5 to 8, the n-channel shunt tube body 100 is a three-channel shunt tube body, and the ultrasonic transducers 200 are disposed on at least two branch pipe walls of the three-channel shunt tube body. The three-way shunt tube body can be a T-shaped tube body.
For the three-way shunt pipe body, the ultrasonic transducers 200 can be arranged on all branch pipelines to realize flow measurement.
As an example, referring to fig. 1 to 4, the n-channel shunt tube body 100 is a four-channel shunt tube body, and the ultrasonic transducers 200 are disposed on at least three branch pipe walls of the four-channel shunt tube body. The four-way shunt pipe body can be a cross pipe body.
For the four-way shunt tube body, the ultrasonic transducer 200 can be arranged on the three-way branch tube to measure the flow, and the liquid flow of the other branch tube can be obtained by calculating the energy conservation relation. The ultrasonic transducers 200 can also be arranged on four branch pipelines simultaneously, and the liquid flow in each branch pipeline is respectively measured.
Further, as shown in fig. 1 to 8, each branch pipe port of the n-way branching pipe body 100 is provided with a flange. The flange is configured, so that the connection between the shunt pipe body 100 and the pipeline in the water supply network can be conveniently realized. The point where the branch pipes of the shunt pipe body 100 converge is used as a node, and the port of the branch pipe is a port far away from the node.
Still further, as shown in fig. 2 and fig. 6, the ultrasonic transducer 200 is connected to a wall of the branch pipeline through a transducer interface 110 disposed on the branch pipeline, and a rubber strip is used to seal between the ultrasonic transducer 200 and the transducer interface 110.
The transducer interface 110 may be pre-formed on the branch conduit to facilitate installation of the ultrasonic transducer 200. The transducer interface 110 is directly arranged at 45 degrees to the branch pipe, which can meet the installation requirement of the ultrasonic transducer 200. By means of the transducer interface 110, one end of the ultrasonic transducer 200 is communicated with the branch pipeline, and the other end can be connected with the control box 300 through a lead for data transmission.
There may be a gap between the ultrasonic transducer 200 and the transducer interface 110, and a rubber strip is used to seal the gap, so as to prevent liquid leakage and avoid affecting the accuracy of the measurement.
Still further, as shown in fig. 2 and fig. 6, the control box 300 includes a power interface 310 and a transducer connection port 320, wherein the power interface 310 is used for connecting with the commercial power; the transducer connection port 320 serves as a signal transmission interface for the ultrasonic transducer 200.
The power interface 310 is used to provide an interface for supplying power to the power consumption units in the control box 300, and the power interface 310 may be supplied with commercial power. The transducer connection port 320 is used for connecting the ultrasonic transducer 200 with corresponding components in the control box 300 for data transmission. The power source interface 310 and the transducer connection ports 320 may be disposed on the bottom surface of the control box 300, and the number of the transducer connection ports 320 may be adapted to the number of the ultrasonic transducers 200.
Still further, as shown in fig. 9, the control box 300 further comprises a data processing unit 330, wherein the data processing unit 330 comprises a microcontroller 331, a signal transmitting circuit 332, an electronic switching circuit 333, a signal amplifying circuit 334 and a time measuring circuit 335,
the microcontroller 331 is configured to control the electronic switch circuit 333 to execute a forward ultrasonic transmission circuit or a reverse ultrasonic transmission circuit, and then control the signal transmitting circuit 332 to generate a transmitting electrical signal, where the transmitting electrical signal enters the forward transmitting transducer on each branch pipe through the forward ultrasonic transmission circuit of the electronic switch circuit 333 or enters the reverse transmitting transducer on each branch pipe through the reverse ultrasonic transmission circuit of the electronic switch circuit 333, the corresponding transmitting transducer converts the transmitting electrical signal into an ultrasonic signal, and then is received by the corresponding other ultrasonic transducer 200, the other ultrasonic transducer 200 converts the received ultrasonic signal into a receiving electrical signal, the receiving electrical signal enters the signal amplifying circuit 334 through the electronic switch circuit 333 to be amplified, and the obtained amplified signal is received by the time measuring circuit 335, the time measuring circuit 335 records the time of receiving the amplified signal, and transmits the time to the microcontroller 331, and the microcontroller 331 obtains the forward and reverse ultrasonic propagation times corresponding to the two ultrasonic transducers 200 on each branch pipeline according to the transmission time of the transmitted electric signal and the receiving time of the amplified signal, and further calculates and obtains the liquid flow in each branch pipeline corresponding to the middle time.
The control electronic switch circuit 333 may execute a forward ultrasonic transmission circuit or a backward ultrasonic transmission circuit under the control of the microcontroller 331, wherein when the forward ultrasonic transmission circuit is executed, the forward transmitting transducer is used as the transmitting transducer during forward transmission, and the corresponding other ultrasonic transducer 200 (backward transmitting transducer) is used as the receiving transducer; accordingly, when the reverse ultrasonic wave transmission circuit is implemented, the reverse transmitting transducer serves as a transmitting transducer, and one ultrasonic transducer 200 (forward transmitting transducer) serves as a receiving transducer.
As shown in fig. 9, taking an example in which three pairs of ultrasonic transducers 200 are respectively disposed in a cross-shaped shunt body, forward and reverse ultrasonic propagation times are measured, and the following description is made specifically:
forward propagation time measurement procedure: the microcontroller 331 controls the electronic switch circuit 333 to execute a forward ultrasonic transmission circuit to transmit an ultrasonic signal from a forward transmitting transducer on each branch pipeline to a backward transmitting transducer, then the microcontroller 331 controls the signal transmitting circuit 332 to generate an electric signal, the electric signal enters the forward transmitting transducer through the forward ultrasonic transmission circuit in the electronic switch circuit 333, the forward transmitting transducer converts the electric signal into an ultrasonic signal, the ultrasonic signal is received by the backward transmitting transducer of the corresponding ultrasonic transducer after passing through the liquid in the branch channel, the backward transmitting transducer converts the received ultrasonic signal into an electric signal, the electric signal enters the signal amplifying circuit 334 for amplifying the electric signal through the weak ultrasonic transmission circuit 333, the time measuring circuit 335 records the time when the ultrasonic wave in each branch channel is transmitted through the liquid to be detected in the forward direction, and transmitted to the microcontroller 331, and the microcontroller 331 calculates the forward propagation time by combining the time when the microcontroller 331 transmits the electric signal with the signal transmitting circuit and the time when the received ultrasonic wave is propagated forward and passes through the liquid to be measured;
reverse propagation time measurement procedure: the microcontroller 331 controls the electronic switch circuit 333 to execute a reverse ultrasonic transmission circuit to transmit ultrasonic signals from the reverse transmitting transducer on each branch pipeline to the forward transmitting transducer, that is, compared with forward propagation, the signal transmitting transducer is changed into a signal receiving transducer, the signal receiving transducer is changed into a signal transmitting transducer, then the microcontroller 331 controls the signal transmitting circuit 332 to generate electric signals, the electric signals enter the reverse transmitting transducer of each branch pipeline through the reverse ultrasonic transmission circuit in the electronic switch circuit 333, the reverse transmitting transducer converts the electric signals into ultrasonic signals, the ultrasonic signals are received by the forward transmitting transducer after passing through liquid in the branch pipeline, the forward transmitting transducer converts the received ultrasonic signals into electric signals, the electric signals enter the signal amplifying circuit 334 through the electronic switch circuit 333 to amplify weak electric signals, the time measuring circuit 335 records the time when the ultrasonic wave in each branch channel reversely propagates through the measured liquid, and transmits the time to the microcontroller 331, and the microcontroller 331 calculates the reverse propagation time by combining the time when the signal transmitting circuit transmits the electric signal and the time when the received ultrasonic wave reversely propagates through the measured liquid;
the microcontroller 331 obtains the forward or backward ultrasonic wave transmission time in each branch channel according to the time when the signal transmitting circuit 332 generates the electrical signal and the time when the received ultrasonic wave passes through the liquid to be measured, and then calculates and obtains the corresponding liquid flow rate in sequence. Each time data and corresponding fluid flow value may be stored in the memory 336. The microcontroller 331 can control the timing of the data stored in the memory 336 to be transmitted to the measurement and control terminal through the wireless signal transmitter 337 through the setting of the interval time.
Referring to fig. 4, when the n-channel shunt tube 100 is cross-shaped, three of the branch lines can measure the liquid flow therein by the ultrasonic transducers 200; for the fourth branch pipeline, the liquid flow of the fourth branch pipeline can be obtained by calculating through the node flow conservation (the inflow node flow is equal to the outflow node flow). When the n-channel shunt tube body 100 is T-shaped, as shown in fig. 8, two of the branch pipes can measure the liquid flow therein by the ultrasonic transducers 200 disposed thereon; for the third branch pipeline, the liquid flow of the third branch pipeline can be obtained by calculating through the node flow conservation (the flow of the inflow node is equal to that of the outflow node).
The n-channel shunt tube body 100 can also be provided with ultrasonic transducers on all branch pipelines, and the corresponding liquid flow can be directly measured and calculated.
Still further, as shown in fig. 9, the data processing unit 330 further includes a memory 336, and the memory 336 is used for storing the liquid flow data transmitted by the microcontroller 331. For subsequent data transfer.
Still further, as shown in fig. 9, the data processing unit 330 further includes a wireless signal transmitter 337, and the wireless signal transmitter 337 is configured to transmit the liquid flow data transmitted from the memory 336 to the measurement and control terminal. Therefore, the acquisition and further corresponding control of the upper-level control layer on the liquid flow data of the water supply network can be realized.
Still further, as shown in fig. 2 and fig. 6, the distance from the ultrasonic transducer 200 to the n-channel shunt body 100 node or the outer port is at least 10D, where D is the inner diameter of the branch pipe.
The node distance or the external port distance between the ultrasonic transducer 200 and the n-channel shunt tube 100 can be adjusted according to the relevant specifications of the ultrasonic flow meter.
In summary, the flow divider of the present invention has both flow dividing and metering functions, and can realize the integrated installation of the flow dividing part and the metering part, thereby facilitating the simplification of the installation procedure in the construction site. In addition, the sharing of the data processing unit is realized, namely the liquid flow of the n branch pipelines can be simultaneously measured through the synchronous control of one data processing unit, the consistency of the metering time is ensured, and the engineering cost is greatly saved.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (9)
1. A flow divider for independent metering and zoning of a water supply network is characterized by comprising an n-channel flow dividing pipe body (100), an ultrasonic transducer (200) and a control box (300),
two ultrasonic transducers (200) are arranged on each branch pipeline wall of at least n-1 branch pipelines of the n-channel shunt pipe body (100), the two ultrasonic transducers (200) are positioned on two sides of the corresponding branch pipelines, acute included angles between the ultrasonic transducers and the branch pipeline walls are both 45 degrees, and the axes of the two ultrasonic transducers (200) are overlapped and are intersected with the axes of the branch pipelines;
the ultrasonic transducer (200) close to the node on the wall of each branch pipeline is used as a forward transmitting transducer, and the ultrasonic transducer (200) far away from the node is used as a reverse transmitting transducer;
the control box (300) is arranged on the outer wall of the n-channel shunt pipe body (100); the control box (300) is used for controlling the forward transmitting transducer on each branch pipeline to transmit signals in the forward direction and controlling the reverse transmitting transducer to receive signals; then the backward transmitting transducer is controlled to transmit signals in the backward direction, and the forward transmitting transducer receives the signals; then respectively obtaining the forward propagation time and the backward propagation time of the liquid in each branch pipeline according to signals transmitted by the two ultrasonic transducers on each branch pipeline, and finally calculating to obtain the liquid flow in each branch pipeline corresponding to the middle moment; the intermediate time is the median of a time period formed from the forward intermediate time to the reverse intermediate time; the forward middle time is the median of the start and stop time of the forward propagation process; the reverse middle time is the median of the start and stop time of the reverse propagation process, and n is an integer greater than or equal to 3;
the control box (300) further comprises a data processing unit (330), the data processing unit (330) comprises a microcontroller (331), a signal transmitting circuit (332), an electronic switching circuit (333), a signal amplifying circuit (334) and a time measuring circuit (335),
the microcontroller (331) is used for controlling the electronic switch circuit (333) to execute a forward ultrasonic transmission circuit or a reverse ultrasonic transmission circuit, then controlling the signal transmitting circuit (332) to generate a transmitting electric signal, the transmitting electric signal enters a forward transmitting transducer on each branch pipeline through the forward ultrasonic transmission circuit of the electronic switch circuit (333) or enters a reverse transmitting transducer on each branch pipeline through the reverse ultrasonic transmission circuit of the electronic switch circuit (333), the corresponding transmitting transducer converts the transmitting electric signal into an ultrasonic signal and then is received by the corresponding other ultrasonic transducer (200), the other ultrasonic transducer (200) converts the received ultrasonic signal into a receiving electric signal, and the receiving electric signal enters the signal amplifying circuit (334) through the electronic switch circuit (333) to be amplified, the obtained amplified signals are received by a time measuring circuit (335), the time measuring circuit (335) records the time of receiving the amplified signals and transmits the amplified signals to a microcontroller (331), and the microcontroller (331) obtains the forward ultrasonic wave propagation time and the reverse ultrasonic wave propagation time corresponding to two ultrasonic transducers (200) on each branch pipeline according to the sending time of the transmitted electric signals and the receiving time of the amplified signals, and further calculates and obtains the liquid flow in each branch pipeline corresponding to the middle time.
2. The flow splitter for independent metering zoning for a water supply network according to claim 1, wherein the n-way flow splitting tube body (100) is a three-way flow splitting tube body, and ultrasonic transducers (200) are arranged on at least two branch tube walls of the three-way flow splitting tube body.
3. The flow splitter for independent metering zoning for a water supply network according to claim 1, wherein the n-way flow splitting tube body (100) is a four-way flow splitting tube body, and ultrasonic transducers (200) are arranged on at least three branch tube walls of the four-way flow splitting tube body.
4. The flow divider for independent metering partitions of water supply networks according to claim 2 or 3, characterized in that each branch pipe port of the n-way flow divider body (100) is equipped with a flange.
5. The flow divider for the independent metering and zoning of the water supply network according to claim 4, characterized in that the ultrasonic transducer (200) is connected with the wall of the branch pipeline through a transducer interface (110) arranged on the branch pipeline, and a rubber strip is used for sealing between the ultrasonic transducer (200) and the transducer interface (110).
6. The flow diverter according to claim 5, wherein the control box (300) comprises a power interface (310) and a transducer connection port (320), the power interface (310) being adapted for connection to mains electricity; the transducer connection port (320) serves as a signal transmission interface of the ultrasonic transducer (200).
7. The flow diverter according to claim 6, wherein the data processing unit (330) further comprises a memory (336), the memory (336) storing fluid flow data communicated from the microcontroller (331).
8. The flow diverter according to claim 7, wherein the data processing unit (330) further comprises a wireless signal transmitter (337), the wireless signal transmitter (337) being configured to transmit the liquid flow data from the memory (336) to the measurement and control terminal.
9. The flow diverter of claim 8, wherein the ultrasonic transducers (200) are spaced from the n-channel diverter body (100) nodes or external ports by a distance of at least 10D, where D is the branch conduit internal diameter.
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Citations (2)
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| CN101398130A (en) * | 2008-04-23 | 2009-04-01 | 深圳市凯旺电子有限公司 | Monitoring system for monitoring fluid transmission pipe by prior wireless network |
| CN206930321U (en) * | 2017-06-16 | 2018-01-26 | 北方民族大学 | Non-full pipe ultrasonic flowmeter |
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| JP5240121B2 (en) * | 2009-08-20 | 2013-07-17 | パナソニック株式会社 | Fluid flow measuring device |
| CN103017843A (en) * | 2012-12-07 | 2013-04-03 | 大连铭友电子工程有限公司 | Ultrasonic flowmeter |
| CN103868555B (en) * | 2012-12-11 | 2017-08-04 | 南京理工大学 | Difference detection method during a kind of circulation for ultrasonic flowmeter |
| US9928724B2 (en) * | 2015-05-13 | 2018-03-27 | Rachio, Inc. | Flow characteristic detection and automatic flow shutoff |
| CN208366399U (en) * | 2018-07-18 | 2019-01-11 | 广东和达康明科技股份有限公司 | A kind of ultrasonic water meter of adjustable water system hydraulic pressure and flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398130A (en) * | 2008-04-23 | 2009-04-01 | 深圳市凯旺电子有限公司 | Monitoring system for monitoring fluid transmission pipe by prior wireless network |
| CN206930321U (en) * | 2017-06-16 | 2018-01-26 | 北方民族大学 | Non-full pipe ultrasonic flowmeter |
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