CN113340539A - On-line monitoring device and method for leakage of directly-buried large-diameter domestic water supply pipeline - Google Patents
On-line monitoring device and method for leakage of directly-buried large-diameter domestic water supply pipeline Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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Abstract
The invention discloses a leakage on-line monitoring device and a leakage on-line monitoring method for a directly-buried large-diameter domestic water supply pipeline, and belongs to the field of leakage monitoring. When the water is used in the valley, the electric valves of the main pipe on the adjacent upper and lower-stage leakage detection devices are closed, the water flow of the bypass pipe on the adjacent upper and lower-stage leakage detection devices is measured, the difference value of the water flow is calculated, the leakage condition of the section of main pipeline is judged according to the difference value, and then the electric valves of the main pipe are opened to recover the total runoff of the main pipe. The device can carry out segmentation detection and judgement to the trunk line, for the pipeline leak hunting, overhaul provide the help, effectively reduce the waste of the big pipe diameter life water supply pipe of direct-burried because of the long-term seepage causes the water resource.
Description
Technical Field
The invention relates to the field of leakage monitoring, in particular to a device and a method for online monitoring leakage of a directly-buried large-diameter domestic water supply pipeline.
Background
The direct-buried water supply pipe is easy to leak due to aging of the pipe, soil displacement and the like after being used for a long time. If the leakage phenomenon appears in the pipeline and can not in time discover and repair and will cause the waste of water resource, and cause the leakage department soil loss and undercut phenomenon because of the pipeline leakage, arouse then that the pipeline warp, shift, damage etc. cause bigger economic loss.
Present city life water supply pipe, the general pipe diameter of garden water main pipe all is very big, and adopt buried laying underground mostly, because water supply pipe direct-burried underground, hardly discover the general seepage phenomenon of pipeline, when adopting wide range flowmeter to supervise on the trunk line, because the error reason of measurement appearance, still be difficult to discovery and judgement to general seepage, only when the seepage is great, wide range flowmeter just plays, or the ground landslide or running water just can be found when following the surface of the earth blowout appear, but this moment has caused a large amount of water resource to run off, simultaneously to ground, pipeline etc. causes the destruction of different degree. Therefore, when general leakage occurs in the pipeline, the general leakage should be found and repaired in time, and the invention discloses the on-line monitoring device and the method for leakage of the directly-buried large-diameter domestic water supply pipeline, which are designed for meeting the requirement.
Disclosure of Invention
The invention aims to provide a device and a method for online monitoring leakage of a directly-buried large-diameter domestic water supply pipeline, which solve the technical problems in the background art.
An on-line monitoring device for leakage of a direct-buried large-diameter domestic water supply pipeline and a method thereof comprise a main pipeline, a plurality of leakage detection devices are arranged on the main pipeline at intervals, the output ends of the plurality of leakage detection devices are connected with a control device, each leakage detection device comprises an electric valve, a first manual valve, a first flowmeter, a second manual valve and a bypass pipe, the electric valve is arranged on the main pipeline, the by-pass pipe is connected on the main pipeline at two ends of the electric valve, and is communicated with the main pipeline, the first manual valve, the first flowmeter and the second manual valve are sequentially arranged on the bypass pipe, the electric valve and the first flowmeter are both connected with the control device, the two leakage detection devices are used for detecting whether the main pipeline of the compartment leaks or not, the control device is used for acquiring data of the leakage detection device and then monitoring whether leakage occurs in each section of the main pipeline.
Further, the distance between the leakage detection device and the main pipeline between the leakage detection devices is the distance between the upper-level pipeline maintenance well and the lower-level pipeline maintenance well.
Further, still include first lateral conduit and second lateral conduit, be provided with branch pipe seepage detection device on the first lateral conduit, be provided with seepage detection device on the second lateral conduit, branch pipe seepage detection device includes manual valve of third, second flowmeter and the manual valve of fourth, manual valve of third, second flowmeter and fourth set gradually on first lateral conduit, the second flowmeter is connected with controlling means.
Further, still include a plurality of first spinal branch pipelines, a plurality of first spinal branch pipelines all are connected with the trunk line, all are provided with branch pipe leakage detection device on every first spinal branch pipeline, and branch pipe leakage detection device includes manual valve of third, second flowmeter and the manual valve of fourth, manual valve of third, second flowmeter and the manual valve of fourth set gradually on first spinal branch pipeline, the second flowmeter is connected with controlling means.
Further, the control device comprises a controller and a display screen, wherein the display screen is connected with the controller.
And each household wireless water meter collects the flow of the household water pipe, transmits the flow to the wireless receiving module, and stores the flow into the controller to calculate the flow of the water for the front-end user.
A detection method for a leakage on-line monitoring device of a direct-buried large-diameter domestic water supply pipeline comprises the steps that during a non-detection time period, an electric valve on a main pipeline, a manual valve on a bypass pipe and a manual valve on a branch pipeline are all in an open state, when detection is needed, a control device sends an instruction to control the electric valve to be closed, then the flow value of a flow meter on the bypass pipe is collected, the collected value is marked, then the flow value difference of the flow meters on two adjacent bypass pipes is calculated, namely delta S is SOn the upper part-SLower partDelta S is the difference between the readings of the upper and lower flow meters at intervals, SOn the upper partFor reading of the upper end of the flow of the adjacent flowmeter, SLower partComparing Delta S with a system preset value for the reading at the lower end of the water flow of the adjacent flowmeter, and judging that the pipeline between the two flowmeters has leakage when the reading is larger than the preset value, otherwise, judging that the pipeline does not have leakage.
Further, when branch pipelines are arranged, when whether the pipeline between the branch pipeline and the nearest electric valve of the main pipeline leaks needs to be detected, the electric valve nearest to the branch pipeline is closed, then corresponding flow count values of the main pipeline are collected, meanwhile, branch pipeline flow count values on each branch pipeline are collected, and then calculation is carried out, namely the calculation is carried out
SiComparing Delta S with the preset value of the system for counting the flow of branch pipes on the branch pipes, and comparing the current value with the preset valueAnd when the preset value is large, judging that the pipeline between the two flowmeters leaks, otherwise, judging that the pipeline between the two flowmeters does not leak.
Further, the specific measurement process during measurement is as follows: first, the absolute error of the flowmeter is calculated
△＝r0×(Amax-Amin)
In the formula: delta is the absolute error, roTo reference errors, related to the accuracy of the meter, AmaxIs the maximum value of the scale of the instrument, AminIs the minimum value of the scale of the instrument, and the measuring range of the instrument is (A)max-Amin)
When A isminWhen equal to 0, there is
Δ＝r0×Amax
Maximum value A of instrument scale under the same precisionmaxThe smaller, the smaller the absolute error,
the leakage amount is the upper level flow rate-the lower level flow rate,
the upper-level flow is the upper-level flow measured value plus or minus the upper-level flow absolute error value,
the lower flow rate is the lower flow rate measurement value plus or minus the lower flow rate absolute error value,
then, the leak amount is (upper flow measurement value ± upper flow absolute error value) - (lower flow measurement value ± lower flow absolute error value).
Further, the specific detection process is that during detection, the control device controls all the electric valves to be closed, then the household wireless water meter collects the flow of the household water meter and transmits the flow to the control device in a clean and wireless manner, meanwhile, the control device collects the numerical values of all the flowmeters and branch flowmeters on the main pipeline, then whether the branch pipe between the household electric meter and the branch flowmeter leaks is detected firstly, then, the subsequent stage comparison detection is carried out, whether the pipeline between every two electric valves leaks or not is directly displayed by a display screen on the control device, meanwhile, an anti-corrosion waterproof layer is wrapped outside the main pipeline, a plurality of humidity sensors are arranged inside the main pipeline, the plurality of humidity sensors are arranged outside the main pipeline at intervals and are sealed by the anti-corrosion waterproof layer, the plurality of humidity sensors are connected with the control device, when the humidity sensors detect the humidity, and manually detecting the main pipeline sensing the humidity.
By adopting the technical scheme, the invention has the following technical effects:
according to the invention, when the flow of tap water through the main pipeline is slow, the electric valve on the main pipeline is closed, the flow of the bypass flowmeter is measured, whether leakage exists in the interval is judged by measuring the flow difference value at two ends of the pipeline interval, and the electric valve on the main pipeline is opened after the measurement is finished.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Reference numbers in the figures: 1-an electric valve; 2-a first manual valve; 3-a first flow meter; 4-second manual valve; 5-a bypass pipe; 6-a third manual valve; 7-a second flow meter; 8-a fourth manual valve; 9-a main pipeline; 10-a first branch conduit; 11-a second branch conduit; 12-control means.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments are given and the present invention is described in further detail. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Example 1:
an online leakage monitoring device for a direct-buried large-diameter domestic water supply pipeline and a method thereof are disclosed, as shown in figure 1, the online leakage monitoring device comprises a main pipeline 9, a plurality of leakage detection devices are arranged on the main pipeline 9 at intervals, the output ends of the plurality of leakage detection devices are connected with a control device 12, each leakage detection device comprises an electric valve 1, a first manual valve 2, a first flowmeter 3, a second manual valve 4 and a bypass pipe 5, the electric valve 1 is arranged on the main pipeline 9, the bypass pipe 5 is connected on the main pipeline 9 at two ends of the electric valve 1 and is communicated with the main pipeline 9, the first manual valve 2, the first flowmeter 3 and the second manual valve 4 are sequentially arranged on the bypass pipe 5, the electric valve 1 and the first flowmeter 3 are both connected with the control device 12, and the two leakage detection devices are used for detecting whether leakage occurs in the main pipeline 9 between intervals, the control device 12 is used for collecting data of the leakage detection device and then monitoring whether leakage occurs in each section of the main pipeline 9.
The distance between the leakage detection device and the main pipeline 9 between the leakage detection devices is the distance between the upper and lower pipeline maintenance wells. The embodiment further comprises a first branch pipeline 10 and a second branch pipeline 11, a branch leakage detection device is arranged on the first branch pipeline 10, a leakage detection device is arranged on the second branch pipeline 11, the branch leakage detection device comprises a third manual valve 6, a second flow meter 7 and a fourth manual valve 8, the third manual valve 6, the second flow meter 7 and the fourth manual valve 8 are sequentially arranged on the first branch pipeline 10, and the second flow meter 7 is connected with a control device 12.
In this embodiment, a branch pipe is branched from a large main pipe, and the latter branch pipe (the second branch pipe 11) belongs to the main pipe, but has a smaller pipe diameter than the original main pipe 9. The second branch pipe 11 may be branched. As shown in fig. 1, a and B are used for monitoring whether the main pipe 9 between a and B leaks, wherein the main pipe 9 may be provided with a plurality of such detection structures as required to monitor the distance between each section of pipe diameter. And then between B and C and D for detecting problems of leakage between the three.
When the water is in the valley, the controller 12 closes the electric valves in the leakage detection devices A and B at the same time to enable the water flow to completely flow through the bypass pipe, then collects the flow data of the flow meters in the leakage detection devices A and B, calculates the difference value between the flow meters, judges whether the main pipeline of the section leaks or not according to the difference value, when the difference value is larger, the leakage is serious, and when the difference value is smaller or equal to 0, the leakage is lighter or no leakage is judged. And then the electric valve is opened again to recover the full runoff of the main pipe. When it is necessary to test whether there is a leak in another section of the main conduit, the method is similar to the above.
Example 2:
the embodiment is different from embodiment 1 in that the flow meter further comprises a plurality of first branch pipelines 10, the plurality of first branch pipelines 10 are all connected with a main pipeline 9, each first branch pipeline 10 is provided with a branch pipe leakage detection device, each branch pipe leakage detection device comprises a third manual valve 6, a second flow meter 7 and a fourth manual valve 8, the third manual valve 6, the second flow meter 7 and the fourth manual valve 8 are sequentially arranged on the first branch pipelines 10, and the second flow meter 7 is connected with a control device 12. The first branch pipes 10 are all branch pipes directly entering the house, and the pipe diameters are all small.
The control device 12 includes a controller and a display screen connected to the controller. The controller is the minimum system of the existing PLC controller 200 or STM32 series single-chip microcomputer.
For example, fig. 2 is a problem that a plurality of small pipes are connected behind a main pipe, and then each small pipe needs to be monitored simultaneously, and monitoring is completed by installing monitoring devices E and F on the small pipes.
An electric valve is arranged on a main pipeline with a large pipe diameter through which tap water flows, bypass pipes with small pipe diameters are connected to two sides of the electric valve, a flowmeter and two manual valves are arranged on the bypass pipes in front of and behind the flowmeter;
(2) a flowmeter is arranged on a common pipe diameter (a flowmeter is directly arranged to measure accuracy and meet calculation requirements) pipeline through which tap water flows, and two manual valves are arranged in front of and behind the flowmeter.
(3) Through the big data analysis of ordinary pipe diameter flow, acquire water consumption information, when the water low ebb, close the motorised valve on the trunk line, measure bypass flowmeter's flow, through measuring the flow difference value of the adjacent upper and lower level of pipeline interval, judge whether there is the seepage in this interval, open the motorised valve on the trunk line after the measurement finishes.
(4) The method solves the problem that the measurement precision of a large-flow meter of the pipe diameter of the main pipe cannot meet the calculation of the leakage of the small-flow tap water, thereby finding the leakage in a common leakage stage to reduce the economic loss or environmental pollution caused by the leakage of the tap water.
Branch-free main pipe
Installing accessories:
a main pipe electric valve 1 is installed at the upper stage of a main pipe section to be detected for leakage, control lines are connected to DI and DO ports of a control device, two bypass pipes with relatively small pipe diameters are connected to two ends of the electric valve, two manual valves 2 are installed on the bypass pipes, a tap water flowmeter 3 is installed between the two manual valves, and the control lines are connected to an AI port of the control device. (the tap water flow meter is arranged on the bypass pipe mainly for improving the measuring precision and saving the cost of purchasing the flow meter; and the manual valve is arranged mainly for facilitating the maintenance). similarly, a main pipe electric valve, a bypass pipe, a tap water flow meter and a manual valve are also arranged at the lower stage of the section end. This completes the attachment of one measurement block section.
A detection step:
the manual valve of the bypass pipe is kept open during non-maintenance time. And (3) keeping the electric valve of the trunk pipe in an open state at the peak time of the flow of the trunk pipe (the time is set according to the data statistical result detected by the water meter of each user, usually in the daytime), and not detecting leakage. When the flow is in the low valley (the time is set according to the data statistical result detected by the water meter of each user, usually in the late night period), the controller sends a signal to close the electric valve of the main pipe, and at the moment, the flow of the main pipe completely passes through the bypass pipe (because the current tap water flow is small, the electric valve of the main pipe is closed, and the influence on the subordinate users is small). The system compares the reading difference Delta S of the upper and lower bypass pipe flow meters in the section with SOn the upper part-SLower partAnd judging whether the interval has leakage, wherein the larger the difference value Delta S is, the higher the possibility of leakage is. And after the measurement is finished, the controller sends a signal to open the electric valve of the main pipe.
With branch trunk pipe
The branched trunk and the unbranched trunk are similar in principle. When the pipe diameter of the branch pipe is larger, a bypass pipe is also required to be additionally arranged, and a flowmeter and a manual valve are arranged on the bypass pipe. If the pipe diameter of the branch pipe is small, a manual valve and a flowmeter can be directly arranged on the branch pipe. In-process leak detectionThe flow difference is calculated by reading S of the upper bypass pipe flowmeterOn the upper partSubtracting the sum of the flow meter readings of each branch pipe at the next stage in the section
Namely, it is
And the minimum value of i is 1.
Thereby judging whether leakage exists in the section. The method for measuring the flow by additionally arranging the small-pipe-diameter bypass pipe on the large-pipe-diameter main pipe is adopted, and the detection is carried out when the flow of the main pipe is in the valley, so that the accuracy of the pipeline leakage detection is effectively improved.
In the non-detection time period, the electric valve on the main pipeline, the manual valve on the bypass pipeline and the manual valve on the branch pipeline are in an open state, and detection is needed. The control device sends out an instruction to control the electric valve to be closed, then the flow value of the flow meters on the bypass pipes is collected, the collected numerical value is marked, and then the flow value difference of the flow meters on the two adjacent bypass pipes is calculated, namely delta S is SOn the upper part-SLower partDelta S is the difference between the interval flow rates, SOn the upper partFor reading of the upper end of the flow of the adjacent flowmeter, SLower partComparing Delta S with a system preset value for the reading at the lower end of the water flow of the adjacent flowmeter, and judging that the pipeline between the two flowmeters has leakage when the reading is larger than the preset value, otherwise, judging that the pipeline does not have leakage.
A detection method for a leakage on-line monitoring device of a direct-buried large-diameter domestic water supply pipeline comprises the steps that during a non-detection time period, an electric valve on a main pipeline, a manual valve on a bypass pipe and a manual valve on a branch pipeline are all in an open state, when detection is needed, a control device sends an instruction to control the electric valve to be closed, then the flow value of a flow meter on the bypass pipe is collected, the collected value is marked, then the flow value difference of the flow meters on two adjacent bypass pipes is calculated, namely delta S is SOn the upper part-SLower partΔ S is the interval flow rateDifference of lower level flowmeter readings, SOn the upper partFor reading of the upper end of the flow of the adjacent flowmeter, SLower partComparing Delta S with a system preset value for the reading at the lower end of the water flow of the adjacent flowmeter, and judging that the pipeline between the two flowmeters has leakage when the reading is larger than the preset value, otherwise, judging that the pipeline does not have leakage.
When branch pipelines are arranged, when whether the pipeline between the branch pipeline and the nearest electric valve of the main pipeline leaks needs to be detected, the electric valve nearest to the branch pipeline is closed, then corresponding flow count values of the main pipeline are collected, meanwhile, branch pipeline flow count values on each branch pipeline are collected, and then calculation is carried out, namely the branch pipeline flow count values are obtained
SiComparing deltas with a system preset value for counting the flow of the branch pipe on the branch pipe, and judging that the pipeline between the two flowmeters leaks when the delta s is larger than the preset value, or else, judging that the pipeline between the two flowmeters does not leak.
The leakage amount is calculated as follows:
the absolute error expression of the flowmeter is as follows:
△＝r0×(Amax-Amin)
in the formula: delta is the absolute error, roTo reference errors, related to the accuracy of the meter, AmaxIs the maximum value of the scale of the instrument, AminIs the minimum value of the scale of the instrument, and the measuring range of the instrument is (A)max-Amin)。
AmaxWith the same precision, the formula is as follows0×(Amax-Amin) Thus, (A)max-Amin) The smaller the value, i.e. the smaller the range, the smaller the gauge error Δ value.
Because the total volume of fluid in a certain pipe section is constant under the normal temperature condition, the method comprises the following steps:
the leakage amount is the upper level flow rate-the lower level flow rate,
the upper-level flow is the upper-level flow measured value plus or minus the upper-level flow absolute error value,
the lower flow rate is the lower flow rate measurement value plus or minus the lower flow rate absolute error value,
then, the leak amount is (upper flow measurement value ± upper flow absolute error value) - (lower flow measurement value ± lower flow absolute error value).
The error value changes along with the change of the quantity value, the error of the instrument has a positive error or a negative error, namely, the plus or minus sign before the error cannot be determined, because the error value cannot be calculated in the real measurement, but the influence of the error value on the calculation of the leakage quantity cannot be ignored, particularly for a large-flow pipeline, because the flow is large, if a large-range flowmeter is selected, the larger the absolute error value is, the more difficult the pipeline leakage is to find. To accurately determine the leakage, reducing the absolute error is the only method. Thus, the smaller the gauge range at the same gauge accuracy, i.e. (A)max-Amin) The smaller the leakage calculation, the more accurate the resulting leakage calculation. In a similar way, the small-range flowmeter arranged by the bypass pipe can improve the accuracy of leakage monitoring.
The specific detection process is that during detection, the control device controls all the electric valves to be closed, then the household wireless water meter acquires the flow of the household water meter and transmits the flow to the control device in a clean and wireless manner, meanwhile, the control device collects the numerical values of all the flowmeters and branch flowmeters on the main pipeline, then firstly detecting whether the branch pipe between the household electric meter and the flow meter of the branch pipe leaks or not, then comparing and detecting the branch pipe to the next stage to detect whether the pipeline between every two electric valves leaks or not, then directly displaying by a display screen on the control device, simultaneously wrapping a layer of anti-corrosion waterproof layer outside the main pipeline, arranging a plurality of humidity sensors inside, arranging a plurality of humidity sensors at intervals outside the main pipeline, sealing and wrapping by the anti-corrosion waterproof layer, connecting the plurality of humidity sensors with the control device, when humidity is detected by the humidity sensor, the main pipeline sensing the humidity is manually detected.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a big pipe diameter life water supply pipe seepage on-line monitoring device of direct-burried, includes trunk line (9), its characterized in that: set up a plurality of leakage detection device at the interval on main pipeline (9), a plurality of leakage detection device's input/output end is connected with controlling means (12), and every leakage detection device all includes motorised valve (1), first manual valve (2), first flowmeter (3), manual valve (4) of second and bypass pipe (5), motorised valve (1) sets up on main pipeline (9), bypass pipe (5) are connected on main pipeline (9) at motorised valve (1) both ends to communicate with main pipeline (9), first manual valve (2), first flowmeter (3) and manual valve (4) of second set gradually on bypass pipe (5), motorised valve (1) and first flowmeter (3) all are connected with controlling means (12).
2. The on-line monitoring device for the leakage of the directly-buried large-diameter domestic water supply pipeline according to claim 1, is characterized in that: the distance between the leakage detection device and a main pipeline (9) between the leakage detection devices is the distance between the upper and lower pipeline maintenance wells.
3. The on-line monitoring device for the leakage of the directly-buried large-diameter domestic water supply pipeline according to claim 2, characterized in that: still include first branch pipeline (10) and second branch pipeline (11), be provided with branch pipe leakage detection device on first branch pipeline (10), be provided with leakage detection device on second branch pipeline (11), branch pipe leakage detection device includes third manual valve (6), second flowmeter (7) and fourth manual valve (8), third manual valve (6), second flowmeter (7) and fourth manual valve (8) set gradually on first branch pipeline (10), second flowmeter (7) are connected with controlling means (12).
4. The on-line monitoring device for the leakage of the directly-buried large-diameter domestic water supply pipeline according to claim 2, characterized in that: still include a plurality of first spinal branch pipelines (10), a plurality of first spinal branch pipelines (10) all are connected with main conduit (9), all are provided with branch pipe leakage detection device on every first spinal branch pipeline (10), and branch pipe leakage detection device includes manual valve (6) of third, second flowmeter (7) and manual valve (8) of fourth, manual valve (6) of third, second flowmeter (7) and manual valve (8) of fourth set gradually on first spinal branch pipeline (10), second flowmeter (7) are connected with controlling means (12).
5. The on-line monitoring device for the leakage of the directly-buried large-diameter domestic water supply pipeline according to claim 1, is characterized in that: the control device (12) comprises a controller and a display screen, and the display screen is connected with the controller.
6. The on-line monitoring device for the leakage of the directly-buried large-diameter domestic water supply pipeline according to claim 1, is characterized in that: the intelligent household water meter system further comprises a plurality of household wireless water meters, the control device (12) further comprises a wireless receiving module, and each household wireless water meter collects the flow of a household water pipe, transmits the flow to the wireless receiving module, and stores the flow into the controller to calculate the flow of water for a front-end user.
7. The detection method of the on-line monitoring device for the leakage of the directly buried large-diameter domestic water supply pipeline according to any one of claims 1 to 6, characterized by comprising the following steps: during non-detection time period, the electric valve on the main pipeline, the manual valve on the bypass pipe and the manual valve on the branch pipeline are all in an open state, when detection is needed, the control device sends an instruction to control the electric valve to be closed, then the flow value of the flow meter on the bypass pipe is collected, the collected value is marked, and then the flow value difference of the flow meters on two adjacent bypass pipes is calculated, namely delta S is SOn the upper part-SLower partΔ S is the difference between the readings of the upper and lower stage flow meters at intervals, SOn the upper partFor reading of the upper end of the flow of the adjacent flowmeter, SLower partComparing the Delta S with a system preset value for the reading at the lower end of the water flow of the adjacent flowmeter, and judging that the pipeline between the two flowmeters has leakage when the Delta S is larger than the preset value, otherwise, judging that the pipeline does not have leakage.
8. The detection method of the on-line monitoring device for the leakage of the directly buried large-diameter domestic water supply pipeline according to claim 7, characterized in that: when branch pipelines are arranged, when whether the pipeline between the branch pipeline and the nearest electric valve of the main pipeline leaks needs to be detected, the electric valve nearest to the branch pipeline is closed, then corresponding flow count values of the main pipeline are collected, meanwhile, branch pipeline flow count values on each branch pipeline are collected, and then calculation is carried out, namely the branch pipeline flow count values are obtained
SiAnd comparing the delta S with a preset value of the system for counting the flow of the branch pipes on the branch pipes, and judging that the pipeline between the two flow meters leaks when the delta S is larger than the preset value, otherwise, judging that the pipeline between the two flow meters does not leak.
9. The detection method of the on-line monitoring device for the leakage of the directly buried large-diameter domestic water supply pipeline according to claim 8, characterized in that: the detection result is improved by reducing the absolute error of the measuring instrument, and the specific calculation process is as follows:
the absolute error of the flow meter is expressed as follows: Δ ═ r0×(Amax-Amin)
In the formula: Δ is the absolute error, roTo reference errors, related to the accuracy of the meter, AmaxIs the maximum value of the scale of the instrument, AminIs the minimum value of the scale of the instrument, and the measuring range of the instrument is (A)max-Amin)
Under the same precision, the measuring range of the instrument (A)max-Amin) The smaller, the smaller the absolute error,
the leakage amount is the upper level flow rate-the lower level flow rate,
the upper-level flow is the upper-level flow measured value plus or minus the upper-level flow absolute error value,
the lower flow rate is the lower flow rate measurement value plus or minus the lower flow rate absolute error value,
then, the leak amount is (upper flow measurement value ± upper flow absolute error value) - (lower flow measurement value ± lower flow absolute error value).
10. The detection method of the on-line monitoring device for the leakage of the directly buried large-diameter domestic water supply pipeline according to claim 9, characterized in that: the specific detection process is that during detection, the control device controls all the electric valves to be closed, then the household flow meter acquires the flow of the household water meter and transmits the flow to the control device through wireless, meanwhile, the control device collects the numerical values of all the flowmeters and branch flowmeters on the main pipeline, then firstly detecting whether the branch pipe between the household electric meter and the flow meter of the branch pipe leaks or not, then comparing and detecting the branch pipe to the next stage to detect whether the pipeline between every two electric valves leaks or not, then directly displaying by a display screen on the control device, simultaneously wrapping a layer of anti-corrosion waterproof layer outside the main pipeline, arranging a plurality of humidity sensors inside, arranging a plurality of humidity sensors at intervals outside the main pipeline, sealing and wrapping by the anti-corrosion waterproof layer, connecting the plurality of humidity sensors with the control device, when humidity is detected by the humidity sensor, the main pipeline sensing the humidity is manually detected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110553872.0A CN113340539A (en) | 2021-05-20 | 2021-05-20 | On-line monitoring device and method for leakage of directly-buried large-diameter domestic water supply pipeline |
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| CN114251605A (en) * | 2021-12-29 | 2022-03-29 | 东本电气科技(苏州)有限公司 | Leakage detection method and emergency device for gas underground pipe network |
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