Portable rural water supply pipe network leakage measuring device and measuring method

Abstract

The invention relates to a detection device, in particular to a portable rural water supply pipe network leakage measuring device and a measuring method, and aims to provide the rural water supply pipe network leakage measuring device and the detecting method, which can quickly find the leakage position of a water supply pipe network, contribute to reducing water leakage loss and saving water resources. According to the technical scheme, the portable rural water supply network leakage measuring device is characterized in that the device comprises at least one externally-clamped remote transmission ultrasonic pipeline flowmeter, and the flowmeter has a data remote transmission function; two external clamping type ultrasonic pipeline flowmeters; the control module has data storage, calculation and judgment functions; the control module is communicated with the external clamping type remote transmission ultrasonic pipeline flow meters through a wireless transmission assembly, and is respectively communicated with the two external clamping type ultrasonic pipeline flow meters and the display screen through data lines; a power supply module provided with a battery; and the display screen can display the flow size and the leakage judgment result.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a portable rural water supply pipe network leakage measurement device and a measurement method. Background Art

[0002] As an important public service project, rural drinking water supply directly affects the quality of life of the majority of villagers. Pipeline leakage is the biggest problem in rural drinking water safety management. The rural water supply network is wide and the pipelines are long. Pipeline leakage leads to serious economic losses. Therefore, how to quickly and conveniently find the leakage location of the rural water supply network and reduce the leakage rate is an urgent issue to be solved. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a rural water supply network leakage measurement device and detection method, which can quickly find the leakage location of the water supply network, help reduce leakage losses and save water resources.

[0004] The technical solution provided by the present invention is:

[0005] A method for measuring leakage in a rural water supply network is carried out according to the following steps:

[0006] 1. Install the pipe network leakage measurement device

[0007] Install an external clamp-on remote transmission ultrasonic pipeline flowmeter at the water inlet of the previous level pipeline. The flowmeter has a data remote transmission function and can transmit flow data by wireless transmission. Install two external clamp-on ultrasonic pipeline flowmeters at the pipeline of this level. The two external clamp-on ultrasonic pipeline flowmeters are respectively installed at the water inlet of the pipeline of this level and the water inlet of the pipeline of the previous level after the pipeline of this level is branched.

[0008] 2. Simultaneously measure the flow of three control sections

[0009] Since the flow in the water supply network changes in real time, it is necessary to simultaneously obtain the flow data of three control sections (the water inlet of the previous level pipeline, the water inlet of the current level pipeline, and the water inlet of the previous level pipeline after the branch of the current level pipeline); therefore, the above-mentioned pipe network leakage measurement device is used to simultaneously measure the water inlet flow Q of the previous level pipeline, the water inlet flow Q1 of the current level pipeline, and the water inlet flow Q of the previous level pipeline after the branch of the current level pipeline 1-2 .

[0010] 3. Calculate the relationship between each flow

[0011] Theoretically, the sum of the flow rates of each pipeline at this level drawn from the previous pipeline should be equal to the input flow rate of the water inlet of the previous pipeline, that is, Q = Q1 + Q 1-2In fact, a certain amount of leakage is allowed. The network leakage rate threshold pptl and network leakage volume threshold ppvl are set. If the input flow rate of the previous level pipeline inlet minus the sum of the flow rates of each pipeline at this level is less than the set network leakage threshold, and the ratio of the sum of the flow rates of each pipeline at this level to the input flow rate of the previous level pipeline inlet is less than the network leakage rate threshold, that is, Q-(Q1+Q 1-2 )≤ppvl and (Q1+Q 1-2 ) / Q*100%≤pptl, the pipeline section is judged to be in good working condition, otherwise it needs maintenance;

[0012] 4. Determine the working conditions of the remaining pipelines in this level in turn

[0013] According to the above method, the remaining pipelines of the water supply network are tested in turn to determine the working conditions of the entire water supply network pipelines.

[0014] A portable rural water supply network leakage measurement device, characterized in that: the device includes at least one external clamp-on remote ultrasonic pipe flow meter, which has a data remote transmission function; two external clamp-on ultrasonic pipe flow meters; a control module with data storage, calculation and judgment functions; the control module is connected to the external clamp-on remote ultrasonic pipe flow meter through a wireless transmission component, and is respectively connected to the two external clamp-on ultrasonic pipe flow meters and the display screen through data lines; a power module equipped with a battery; and a display screen that can display the flow size and leakage judgment results.

[0015] The beneficial effects of the present invention are as follows: the provided rural water supply network leakage measurement method can quickly find the leakage location of the network, reduce the economic losses caused by the loss of tap water, and save water resources; the provided rural water supply network leakage measurement device is small in size, easy to carry, and has low equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an installation structure diagram of the rural water supply network leakage measurement device in Example 1 of the present invention when it is used.

[0017] Figure 2 It is a schematic diagram of the rural water supply network leakage measurement process of Example 1 of the present invention.

[0018] Numbers in the figure: 1. Pipe network leakage measuring device; 2. External clamp-on remote ultrasonic pipe flowmeter; 3. First external clamp-on ultrasonic pipe flowmeter; 4. Second external clamp-on ultrasonic pipe flowmeter; 5. Control module; 6. Power module; 7. Display screen; 8. Main pipe; 9. Primary branch pipe; 10. Main pipe after branching the primary branch pipe. DETAILED DESCRIPTION

[0019] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0020] Figure 1 In the rural water supply network leakage measuring device shown, a network leakage measuring device 1 and an external clamp-on remote ultrasonic pipe flowmeter 2 are provided. The external clamp-on remote ultrasonic pipe flowmeter 2 has a data remote transmission function and can transmit the measured flow data remotely to the network leakage measuring device 1; the network leakage measuring device is connected to two external clamp-on ultrasonic pipe flowmeters (a first external clamp-on ultrasonic pipe flowmeter 3 and a second external clamp-on ultrasonic pipe flowmeter 4) by a data line, and the two external clamp-on ultrasonic pipe flowmeters can transmit the measured flow data to the network leakage measuring device. The pipe network leakage measuring device 1 is also equipped with a control module 5, which can store the data transmitted by the external clamp-type remote transmission ultrasonic pipe flowmeter 2, the first external clamp-type ultrasonic pipe flowmeter 3, and the second external clamp-type ultrasonic pipe flowmeter 4, and calculate the relationship between the three flow data and determine whether there is leakage in the pipeline; the pipe network leakage measuring device 1 is also equipped with a power supply module 6 for providing power; the pipe network leakage measuring device 1 is also equipped with a display screen 7, which is used to display the flow data and leakage judgment results measured by the external clamp-type remote transmission ultrasonic pipe flowmeter 2, the first external clamp-type ultrasonic pipe flowmeter 3, and the second external clamp-type ultrasonic pipe flowmeter 4.

[0021] The classification order of rural water supply network is:

[0022] (1) The first primary branch pipe, the second primary branch pipe, and the nth primary branch pipe are led out from the main pipe of the rural water supply network in sequence;

[0023] (2) The first secondary branch, the second secondary branch, and so on and so forth are led out from each primary branch pipe in sequence.

[0024] That is:

[0025] (1) The first pipeline of the same level, the second pipeline of the same level, and the nth pipeline of the same level are led out from the upper pipeline of the rural water supply network in sequence;

[0026] (2) Each pipeline at the same level leads to the first pipeline at the next lower level, the second pipeline at the next lower level, and so on to the nth pipeline at the next lower level.

[0027] The rural water supply network leakage measurement method described in the present invention is further described as follows.

[0028] A portable rural water supply network leakage measurement method is carried out according to the following steps:

[0029] 1. Select the measurement section (i.e. control section)

[0030] The water inlet of the main pipe of the water supply network is selected as the measuring section 0-0, the water inlet of the first first-level branch pipe is selected as the section 1-0, and the water inlet of the main pipe after the first first-level branch pipe branches out is selected as the section 0-1 (that is, the water inlet of the upper-level pipe of the water supply network is selected as the measuring section 0-0, the water inlet of the first pipe of this level is selected as the section 1-0, and the water inlet of the upper-level pipe after the first pipe of this level branches out is selected as the section 0-1).

[0031] 2. Install water supply network leakage measurement device

[0032] An external clamp-on remote transmission ultrasonic pipe flow meter 2 is installed at the measuring section 0-0. The flow meter has a data remote transmission function and uses wireless transmission to transmit flow data to the pipe network leakage measurement device 1. A first external clamp-on ultrasonic pipe flow meter 3 is installed at the measuring section 1-0, and a second external clamp-on ultrasonic pipe flow meter 4 is installed at the measuring section 0-1. Click the power module 6 to start the pipe network leakage measurement device 1.

[0033] 3. Set the network leakage rate threshold value pptl and the network leakage volume threshold value ppvl

[0034] In accordance with relevant requirements, the pipeline network leakage rate threshold pptl and the pipeline network leakage volume threshold ppvl are set.

[0035] 4. Measuring cross-sectional flow (i.e. controlling cross-sectional flow)

[0036] Using the external clamp-on remote ultrasonic pipe flowmeter 2, the first external clamp-on ultrasonic pipe flowmeter 3 and the second external clamp-on ultrasonic pipe flowmeter 4, the flow rates at three measuring sections 0-0, 1-0 and 0-1 are measured simultaneously, i.e., the water inlet flow rate Q of the main pipe of the water supply network, the water inlet flow rate Q1 of the first primary branch pipe and the water inlet flow rate Q of the main pipe after the first primary branch pipe branches. 1-2 (That is: the water inlet flow rate Q of the upper level pipeline of the water supply network, the water inlet flow rate Q1 of the first pipeline of this level, and the water inlet flow rate Q of the main pipe after the branch of the first pipeline of this level 1-2 ).

[0037] 5. Data upload and storage

[0038] Three flow data Q, Q1, Q 1-2 Automatically upload to control module 5.

[0039] 6. Determine the cross-sectional flow relationship

[0040] (1) Determine the pipeline flow relationship (see Figure 2). Theoretically, the sum of the flow rate of the primary branch pipe and the flow rate of the main pipe after the primary branch pipe is branched should be equal to the input flow rate of the main pipe; when the sum of the flow rate of the primary branch pipe and the flow rate of the main pipe after the primary branch pipe is branched is less than the input flow rate of the main pipe, it means that the primary branch pipe (the pipeline at this level) has a leak and needs to be repaired;

[0041] In other words: the sum of the flow rate of the pipeline at this level and the flow rate of the previous pipeline after the branch of the pipeline at this level should be equal to the input flow rate of the previous pipeline; when the sum of the flow rate of the pipeline at this level and the flow rate of the previous pipeline after the branch of the pipeline at this level is less than the input flow rate of the previous pipeline, it means that there is a leak in the pipeline at this level and it needs to be repaired.

[0042] Q=Q1+Q 1-2

[0043] Q 1-2 =Q2+Q 2-3

[0044] …

[0045] Q3=Q 3.1 +Q 3.1-3.2

[0046] …

[0047] Q i =Q i.1 +Q i.1-i.2

[0048] Where: Q is the main pipe flow,

[0049] Q1 is the flow rate of the first primary branch pipe,

[0050] Q 1-2 is the main pipe flow from the first primary branch to the second primary branch,

[0051] Q2 is the flow rate of the second primary branch pipe,

[0052] Q 2-3 is the main pipe flow between the second primary branch pipe and the third primary branch pipe,

[0053] Q3 is the flow rate of the third primary branch pipe,

[0054] Q 3.1 is the flow rate of the first secondary branch in the third primary branch,

[0055] Q 3.2 is the flow rate of the second secondary branch in the third primary branch,

[0056] Q 3.1-3.2 is the flow rate of the third primary branch between the first secondary branch and the second secondary branch in the third primary branch,

[0057] Q i is the flow rate of the ith branch pipe,

[0058] Q i.1 is the flow rate of the first secondary branch of the i-th primary branch,

[0059] Q i.1-i.2 is the flow rate of the i-th primary branch pipe between the first branch pipe and the second branch pipe in the i-th primary branch pipe,

[0060] The arrows shown in the figure are the direction of water flow;

[0061] (2) Calculate flow rates Q, Q1, and Q 1-2 and determine the pipeline condition between node 1 and node 2. 1-2 )≤ppvl and (Q1+Q 1-2 ) / Q*100%≤pptl, the pipeline section is judged to be in good condition, otherwise it needs maintenance; the above is the detection method for the pipeline condition of the first primary branch (node ​​1).

[0062] 7. According to the above method, install the pipe network leakage measurement device at node 2, node 3, and node n in turn, and measure Q 1-2 , Q2, Q 2-3 Until Q i , Q i-1 , Q i.1-i.2 of traffic.

[0063] 8. Test the remaining primary branches of the water supply pipeline to determine the working conditions of the pipeline;

[0064] 9. Operational procedures for rural water supply network leakage measurement method

[0065] (1) Install a water supply network leakage measurement device at node 1, that is, install an external clamp-on remote ultrasonic pipe flowmeter 2 at section 0-0, install an external clamp-on ultrasonic pipe flowmeter 3 at section 1-0, and install an external clamp-on ultrasonic pipe flowmeter 4 at section 0-1;

[0066] (2) Turn on the device power 6 and obtain the flow rates Q, Q1, and Q 1-2 ;

[0067] (3) Calculate Q, Q1, Q 1-2 Relationship between

[0068] (4) If Q-(Q1+Q 1-2 )≤ppvl and (Q1+Q 1-2 ) / Q*100%≤pptl, the pipeline section is judged to be in good working condition, otherwise it needs maintenance;

[0069] (5) According to the above method, measure the cross-sectional flow of the remaining primary branches (or secondary branches) of the water supply pipeline in turn to determine the working conditions of these pipelines.

Claims

1. A method for measuring leakage in a rural water supply network is carried out according to the following steps: (1) Installing a pipe network leakage measurement device Install an external clamp-on remote transmission ultrasonic pipeline flowmeter with data remote transmission function at the water inlet of the previous level pipeline, and install an external clamp-on ultrasonic pipeline flowmeter at the water inlet of the current level pipeline and the water inlet of the previous level pipeline after the branch of the current level pipeline respectively; (2) Simultaneous measurement of flow rates at three water inlets The three ultrasonic pipeline flow meters mentioned above are used to simultaneously measure the flow rates of the three water inlets, namely, the water inlet flow rate Q of the previous pipeline, the water inlet flow rate Q1 of the current pipeline, and the water inlet flow rate Q of the previous pipeline after branching the current pipeline. 1-2 ; (3) Calculate the relationship between each flow rate and determine the working condition of this section of the pipeline If the sum of the flow rate at the water inlet of the previous level of pipeline minus the flow rate at this level of pipeline is less than the set network leakage threshold ppvl, and the ratio of the sum of the flow rate at this level of pipeline to the flow rate at the water inlet of the previous level of pipeline is less than the network leakage rate threshold pptl, that is, Q-(Q1+Q 1-2 )≤ppvl and (Q1+Q 1-2 ) / Q*100%≤pptl, the pipeline section is judged to be in good working condition, otherwise it needs maintenance; (4) Determine the working conditions of the remaining pipelines in turn According to the above method, the remaining pipelines at the same level of the water supply network are tested in turn to determine the pipeline working conditions of the entire water supply network.

2. The classification order of the water supply network is: (1) The first pipeline of the same level, the second pipeline of the same level, and the nth pipeline of the same level are led out from the upper pipeline of the rural water supply network in sequence; (2) Each pipeline at the same level leads to the first pipeline at the next lower level, the second pipeline at the next lower level, and so on to the nth pipeline at the next lower level.

3. A portable rural water supply network leakage measurement device, characterized in that: The device includes at least one external clamp-on remote ultrasonic pipeline flow meter with data remote transmission function, two external clamp-on ultrasonic pipeline flow meters, a control module, a power module equipped with a battery, and a display screen capable of displaying flow size and leakage judgment results; The control module has data storage, calculation and judgment functions, is connected to the external clamp-on remote ultrasonic pipeline flowmeter through a wireless transmission component, and is respectively connected to the two external clamp-on ultrasonic pipeline flowmeters and the display screen through data lines.

Images