Pipe network leakage simulation test system with variable topology

Abstract

The invention discloses a variable topology pipe network leakage simulation test system, and belongs to the technical field of urban water supply simulation. The problems that an existing water supply circulation pipe network simulation system is fixed in topological mode and single in simulation working condition are solved. Comprising a water pipe network which is formed by connecting a plurality of sections of variable topology pipeline assemblies and a plurality of sections of replaceable pipeline assemblies, and sensors and valves for monitoring the water supply state are arranged on corresponding pipe sections; the replaceable pipeline assembly comprises a replaceable section, and a water leakage point is arranged on the replaceable section; the primary water supply tank and the secondary water supply tank are used for supplying water to the water pipe network; a leakage water quantity monitoring device is used for monitoring and collecting the leakage water quantity of the water leakage point; the recycling water tank recycles water discharged from the water pipe network and water collected by the leakage water quantity monitoring device at the set negative height by means of the gravity effect, and supplies water to the first-stage water supply tank and the second-stage water supply tank to form a water supply loop. The device is used for the water supply network leakage simulation test.

Description

Technical Field

[0001] The invention relates to a pipe network leakage simulation test system with variable topology, belonging to the technical field of urban water supply simulation. Background Art

[0002] Urban water supply networks transport water that is indispensable to urban residents in their daily lives and are an important part of the city's lifeline. Leakage in urban water supply networks has exacerbated the shortage of water resources. Therefore, it is necessary to adopt a system engineering approach based on the analysis of the leakage mechanism of the network to systematically solve the leakage problem.

[0003] At present, there are five widely recognized methods for controlling leakage in pipeline networks internationally, namely, zoning management, pipeline pressure control, improving the speed and quality of pipeline maintenance, pipeline renewal, and leakage detection and positioning. To carry out the above research work, pipeline network test research is the basic means, which can be achieved through three levels of test methods. The most direct way is to carry out field tests, but there are problems such as uncontrollable external conditions and it is difficult to carry out targeted quantitative research. More importantly, the test pipeline network involves thousands of households and cannot be tested for a long time; the simplest way is to build a simple single-pipeline test device, but this type of device cannot be used for long-term circulation tests, and there are serious test distortion problems compared with the actual working conditions of the actual pipeline. Therefore, it is preferred to use a test device of a circulating pipeline network model to simulate the real pipeline network with high simulation, providing a panoramic display and analysis.

[0004] The existing circulating pipe network water quality simulation test systems all adopt a fixed topology, that is, the water supply loop pipes are fixedly installed according to the topology of the actual urban water supply pipe network to be simulated. The main technical problems are as follows:

[0005] Single simulation working condition: It is impossible to simulate various complex working conditions such as water supply from multiple water sources, pipe networks with different topologies, and leakage from multiple pipes;

[0006] The measurement of water loss is highly distorted: the use of a faucet to simulate the actual leak does not conform to the actual outflow form of the pipeline leak. The use of a flow meter or traditional weighing method to measure the water loss will result in a large error;

[0007] Automatic collection of leaking water is not implemented: the collection of leaking water is done manually, which will cause splashing of leaking water and affect the test site. Summary of the invention

[0008] In view of the problem that the existing water supply circulation pipe network simulation system has a fixed topology and a single simulation working condition, the present invention provides a pipe network leakage simulation test system with a variable topology.

[0009] A variable topology pipe network leakage simulation test system of the present invention comprises:

[0010] A water pipe network includes a plurality of variable topology pipe components and a plurality of replaceable pipe components. The plurality of variable topology pipe components are sequentially connected to form a peripheral water pipe. The plurality of replaceable pipe components are cross-networked to form a water branch and are connected to the peripheral water pipe. A main valve is provided on each variable topology pipe component, and a sensor for monitoring the water supply status is provided on the selected variable topology pipe component. The replaceable pipe component includes fixed sections at both ends and a replaceable section connected in the middle, and a branch valve is provided on the fixed section. A water leakage point A is simulated through the replaceable section.

[0011] The primary water supply tank is used to provide primary water supply to the water pipe network and realize water supply to all passages of the water pipe network;

[0012] The secondary water supply tank is used to provide secondary water supply to the water pipe network at a set height and realize water supply to all passages of the water pipe network;

[0013] A water loss monitoring device is used to monitor and collect the water loss at the water loss point A;

[0014] The recovery water tank is used to recycle the outflow water of the water pipe network and the collected water of the water loss monitoring device by means of gravity at a set negative height, and supply water to the primary water supply tank and the secondary water supply tank to form a water supply loop.

[0015] According to the variable topology pipe network leakage simulation test system of the present invention, the sensor for monitoring the water supply status includes a flow meter, a pressure gauge and a water quality sensor.

[0016] According to the variable topology pipe network leakage simulation test system of the present invention, a controller is used to control the switching of the main valve and the branch valves to form different expected water supply paths.

[0017] According to the variable topology pipe network leakage simulation test system of the present invention, the water peripheral pipeline has two primary water inlet ends, one secondary water inlet end and a water outlet, and flow meters are arranged on the variable topology pipeline components corresponding to the two primary water inlet ends and the secondary water inlet end;

[0018] The first-level water supply tank includes two first-level water outlets and two first-level water inlets, and the two first-level water outlets are respectively connected to a corresponding first-level water inlet through a first-level water supply pump; one first-level water inlet is used to connect to a return water outlet of a recovery water tank, and the other first-level water inlet is used to connect to a water source.

[0019] According to the variable topology pipe network leakage simulation test system of the present invention, the secondary water supply tank includes two secondary water inlets and one secondary water outlet, the secondary water outlet supplies water to the water pipe network through the secondary water inlet end, one secondary water inlet is used to connect to another return water outlet of the recovery water tank, and the other secondary water inlet is used to connect to the water source;

[0020] A flow meter is arranged on the variable topology pipeline assembly corresponding to the secondary water inlet end.

[0021] According to the variable topology pipe network leakage simulation test system of the present invention, the leakage water monitoring device includes a leakage metering device and a drainage pipeline. The leakage metering device is used to measure and recover the leakage water at the water leakage point A, and is connected to the collection water input port of the recovery water tank through the drainage pipeline.

[0022] According to the variable topology pipe network leakage simulation test system of the present invention, the recovery water tank also has a water outlet input port of the water pipe network, which is used to communicate with the water outlet of the water pipe network;

[0023] Return water pumps are respectively arranged on the water supply pipelines that supply water to the primary water supply tank and the secondary water supply tank from the two return water outlets of the recovery water tank.

[0024] According to the variable topology pipe network leakage simulation test system of the present invention, the leakage metering device includes a guide ring, an annular container, a mass sensor, a density meter, a mobile base and a collected water level sensor.

[0025] The guide ring is connected to the upper port of the annular container, and a water level sensor for collected water is arranged in the annular container; a drain port is arranged at the bottom end of the annular container, and a sealing cover plate is arranged corresponding to the drain port; the drain port is connected to the drain pipeline;

[0026] A mass sensor and a density meter are arranged on the mobile base to measure the annular container on the mobile base.

[0027] According to the variable topology pipe network leakage simulation test system of the present invention, the maximum water level in both the primary water supply tank and the secondary water supply tank is monitored by a water level sensor;

[0028] Two water level sensors are set in the recovery water tank to monitor the highest water level and the lowest water level respectively.

[0029] According to the variable topology pipe network leakage simulation test system of the present invention, the controller performs anti-overflow control of water inlet to the primary water supply tank and the secondary water supply tank according to the maximum water level monitoring results of the primary water supply tank and the secondary water supply tank;

[0030] The controller controls the switch of the sealing cover plate according to the measurement result of the collected water level sensor, so as to realize the conversion between the measurement mode and the drainage mode of the leakage metering device;

[0031] The controller controls the return water pump according to the monitoring results of the water level sensor of the recovery water tank to achieve overflow prevention and water shortage operation control of the recovery water tank;

[0032] The controller controls the primary water supply pump according to the water supply demand of the water pipe network;

[0033] The controller controls the corresponding main valve according to the measurement result of the flow meter on the variable topology pipeline assembly corresponding to the secondary water inlet end, and performs gravity water supply simulation of the secondary water supply tank;

[0034] The controller processes the data of water loss according to the monitoring results of the sensor for monitoring the water supply status, the metering results of the flow meter on the variable topology pipeline assembly corresponding to all the water inlet ends of the water peripheral pipeline, and the calculation results of the mass sensor and the density meter.

[0035] Beneficial effects of the present invention: The present invention can accurately measure the amount of lost water by simulating various working conditions of the water supply pipe network system through the coordination of various setting components, and ensure that the lost water is effectively collected without affecting the surrounding environment.

[0036] The present invention forms a water pipe network through multiple sections of variable topology pipe components and multiple sections of replaceable pipe components, which can be assembled into different topology pipe network forms according to actual needs, realize the simulation of various working conditions, and obtain data support for the loss mechanism through accurate measurement of lost water, which helps to solve the loss problem.

[0037] The system of the present invention adopts a primary water supply tank to simulate multi-water source pumping flow, and a secondary water supply tank to simulate gravity flow. The pipeline components are freely combined and installed. By opening and closing valves and replacing pipelines, the simulation of urban water supply network leakage with various topologies, various water source supply modes, and various pipeline working conditions can be realized. It has the advantage of high simulation degree and can simulate the actual urban water supply network. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the variable topology pipe network leakage simulation test system of the present invention;

[0039] Figure 2 It is a schematic diagram of the network structure of the water pipe network;

[0040] Figure 3 Schematic diagram of a primary water supply tank, in which R1 and R2 represent two primary water inlets, Q1 and Q2 represent two primary water inlets, and 61 represents a water level sensor in the primary water supply tank;

[0041] Figure 4 is a schematic diagram of a secondary water supply tank, in which R3 and R4 represent two secondary water inlets, Q3 represents a secondary water outlet, and 62 represents a water level sensor in the secondary water supply tank;

[0042] Figure 5 is a schematic diagram of a water recovery tank, in which R5 represents a water outlet inlet of a water pipe network, R6 represents a collection water inlet, Q4 and Q5 represent two return water outlets, 63 represents a water level sensor for monitoring the highest water level, and 64 represents a water level sensor for monitoring the lowest water level;

[0043] Figure 6 It is a structural schematic diagram of a water loss monitoring device. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0047] Specific implementation method 1. Combination Figures 1 to 6 As shown, the present invention provides a pipe network leakage simulation test system with variable topology, comprising:

[0048] A water pipe network 1 includes a plurality of variable topology pipe components 11 and a plurality of replaceable pipe components 12. The plurality of variable topology pipe components 11 are connected in sequence to form a peripheral water pipe, and the plurality of replaceable pipe components 12 are cross-networked to form a water branch, which is connected to the peripheral water pipe. A main valve 111 is provided on each variable topology pipe component 11, and a sensor for monitoring the water supply status is provided on the selected variable topology pipe component 11. The replaceable pipe component 12 includes fixed sections 121 at both ends and a replaceable section 122 connected in the middle, and a branch valve 1211 is provided on the fixed section 121. A water leakage point A is simulated through the replaceable section 122.

[0049] The primary water supply tank 2 is used to provide primary water supply to the water pipe network 1 and realize water supply to all passages of the water pipe network 1;

[0050] The secondary water supply tank 3 is used to provide secondary water supply to the water pipe network 1 at a set height and realize water supply to all passages of the water pipe network 1;

[0051] The water loss monitoring device 4 is used to monitor and collect the water loss at the water loss point A;

[0052] The recovery water tank 5 is used to recover the outflow water of the water pipe network 1 and the collected water of the water loss monitoring device 4 by gravity at a set negative height, and supply water to the primary water supply tank 2 and the secondary water supply tank 3 to form a water supply loop.

[0053] In this embodiment, multiple sections of replaceable pipe components 12 can be connected to form a nine-square grid, or they can form other forms of mesh structures according to the connection form of the simulation object.

[0054] In the normal case, the primary water supply tank 2 and the water pipe network 1 are in the same plane, and the secondary water supply tank 3 can be set at a set height as needed, for example, 15m higher than the water pipe network; the recovery tank 5 can be set at a selected height lower than the water pipe network, for example, on the basement floor of a building.

[0055] The multi-section variable topology pipeline assembly 11 and the multi-section replaceable pipeline assembly 12 cooperate with each other to form water pipe networks of different forms. The replaceable section 122 forms a detachable connection structure with the fixed sections 121 at both ends through connectors, which is convenient for replacing pipe fittings that meet different requirements for water leakage point simulation.

[0056] As an example, the sensor for monitoring the water supply status includes a flow meter, a pressure gauge and a water quality sensor. According to the monitoring requirements, one or more sensors can be installed.

[0057] In this embodiment, combined with Figure 1 and Figure 2 As shown, a controller is used to control the switching of the main valve 111 and the branch valve 1211 to form the on and off of the water path, thereby forming different expected water supply paths.

[0058] Furthermore, the water peripheral pipeline has two primary water inlet ends, one secondary water inlet end and a water outlet, and flow meters are provided on the variable topology pipeline components 11 corresponding to the two primary water inlet ends and the secondary water inlet end;

[0059] The primary water supply tank 2 includes two primary water outlets and two primary water inlets, and the two primary water outlets are respectively connected to a corresponding primary water inlet through a primary water supply pump 21; one primary water inlet is used to connect to a return water outlet of the recovery water tank 5, and the other primary water inlet is used to connect to a water source. The primary water supply tank 2 supplies water to the water pipe network 1 through the two water outlets via the water supply pump 21, which can simulate the multi-source pumping flow water supply of the water pipe network 1.

[0060] Furthermore, the secondary water supply tank 3 includes two secondary water inlets and one secondary water outlet, the secondary water outlet supplies water to the water pipe network 1 through the secondary water inlet end, one secondary water inlet is used to connect to another return water outlet of the recovery water tank 5, and the other secondary water inlet is used to connect to the water source;

[0061] A flow meter is provided on the variable topology pipeline assembly 11 corresponding to the secondary water inlet end.

[0062] When the primary water supply tank 2 and the secondary water supply tank 3 supply water to the water pipe network 1 through the corresponding water inlet ends, closing the main valve 111 on the variable topology pipe assembly 11 where the water outlet of the water peripheral pipeline is located can prevent the supply water from directly flowing into the return water tank.

[0063] In this embodiment, sensor interfaces are reserved on the variable topology pipeline assembly 11 and the replaceable pipeline assembly 12. Users can add online test sensors according to different experimental requirements to achieve online monitoring of indicators of interest such as water quality and hydraulics. The length range of the variable topology pipeline assembly 11 and the replaceable pipeline assembly 12 is 0.5 to 20m. The pipe material can be stainless steel, ductile iron, PE, PVC, etc. The pipe diameter is DN10 to DN150. After comprehensive consideration of the size of the test site, the power of the water pump, and the topological structure of the water supply network to be simulated, they can be freely combined and installed. After assembly is completed, the switch states of the main valve 111 and the branch valve 1211 are set to simulate different topological structures. The connection between the replaceable section 122 and the fixed section 121 can be flange, welding, gluing, coil insertion, hot melt, etc.

[0064] The primary water supply tank 2, the secondary water supply tank 3 and the recovery water tank 5 are all provided with cleaning ports and drain ports for regular cleaning, dosing or discharge of stale water to avoid corrosion and scaling of the water pipe network caused by water deterioration, which may affect the accuracy of the test results.

[0065] Combination Figure 1 and Figure 6 As shown, in this embodiment, the water loss monitoring device 4 includes a loss metering device 41 and a drainage pipeline 42. The loss metering device 41 is used to measure and recover the lost water at the water loss point A, and is connected to the collection water input port of the recovery water tank 5 through the drainage pipeline 42.

[0066] Combination Figure 5 As shown, the recovery water tank 5 also has a water outlet input port for the water pipe network, which is used to communicate with the water outlet of the water pipe network 1;

[0067] Return water pumps are respectively arranged on the water supply pipelines through which the two return water outlets of the recovery water tank 5 supply water to the primary water supply tank 2 and the secondary water supply tank 3 .

[0068] Going a step further, combined Figure 6 As shown, the leakage metering device 41 includes a guide ring 411, an annular container 412, a quality sensor 413, a density meter 414, a mobile base 415 and a collected water level sensor 416.

[0069] The guide ring 411 is connected to the upper port of the annular container 412, and a collected water level sensor 416 is arranged in the annular container 412; a drain port is arranged at the bottom end of the annular container 412, and a sealing cover plate is arranged corresponding to the drain port; the drain port is connected to the drain pipeline 42;

[0070] A mass sensor 413 and a density meter 414 are provided on the mobile base 415 for measuring the annular container 412 on the mobile base 415 .

[0071] The sealing cover can be opened and closed by the controller. The controller collects the measurement results of the water level sensor 416. When the water level reaches the warning level or the monitoring is completed, the sealing cover is controlled to open and enter the container drainage mode; otherwise, the sealing cover is controlled to seal the drainage port and enter the metering mode.

[0072] The guide ring 411 is designed to be a trumpet shape according to the principle of fluid dynamics, and is sealed around the container mouth. The size of the opening at the upper end of the guide ring 411 can ensure that the liquid slows down smoothly when flowing into the container to reduce splashing. The material selection of the guide ring 411 takes into account chemical corrosion resistance and wear resistance to adapt to different liquid media, improve the durability of the device, and reduce the measurement error caused by the wear of the guide ring material; the water loss monitoring device 4 can be set up in multiple sets to measure multiple water loss points. The capacity of the recovery water tank 5 is not less than any one of the primary water supply tank 2 and the secondary water supply tank 3. The head of the return water pump should not be less than 25m, and the flow rate should not be less than the sum of the flow rates of the water supply pumps.

[0073] The leakage metering device 41 in this embodiment has the advantages of being movable, splash-proof, highly accurate, recording the change of the leakage water volume in real time, and automatically draining water. While realizing the real-time online and accurate measurement of the change of the leakage water volume, it can maintain the cleanliness and tidiness of the test site;

[0074] Combination Figure 3 and Figure 4 As shown, the maximum water level in the primary water supply tank 2 and the secondary water supply tank 3 is monitored by water level sensors;

[0075] Two water level sensors are arranged in the recovery water tank 5 to monitor the highest water level and the lowest water level respectively.

[0076] Going a step further, combined Figure 1 As shown, the controller performs anti-overflow control of water inlet to the primary water supply tank 2 and the secondary water supply tank 3 according to the maximum water level monitoring results of the primary water supply tank 2 and the secondary water supply tank 3; when the maximum water level is reached, the water supply of the water source is turned off;

[0077] The controller controls the switch of the sealing cover plate according to the measurement result of the collected water level sensor 416, so as to realize the conversion between the measurement mode and the drainage mode of the leakage measurement device 41;

[0078] The controller controls the return water pump according to the monitoring result of the water level sensor of the recovery water tank 5 to realize the overflow prevention and water shortage operation control of the recovery water tank 5;

[0079] The controller controls the primary water supply pump 21 according to the water supply demand of the water pipe network 1;

[0080] The controller controls the corresponding main valve 111 according to the measurement result of the flow meter on the variable topology pipeline assembly 11 corresponding to the secondary water inlet end, and performs gravity water supply simulation of the secondary water supply tank 3;

[0081] The controller collects and processes the data of water loss based on the monitoring results of the sensor monitoring the water supply status, the measurement results of the flow meter on the variable topology pipeline assembly 11 corresponding to all water inlet ends of the water peripheral pipeline, and the calculation results of the mass sensor 413 and the density meter 414.

[0082] In this embodiment, the controller is used to control the opening and closing and pressure adjustment of all water pumps.

[0083] The controller is pre-configured with the automatic calibration function for the lost water volume. It uses linearization processing and zero-point correction to statistically analyze the historical data collected by the online mass sensor and the online density meter to obtain the lost water volume calibration coefficient. The formula for calculating the lost water volume is as follows:

[0084]

[0085] Among them, V is the volume of lost water, α is the calibration coefficient of lost water volume calculated by the controller according to the actual leakage and the calculated leakage, Δm is the current mass change measured by the mass sensor 413, and ρ is the current liquid density measured by the densitometer 414. This formula can be used to directly calculate the volume of lost water later, without the need to measure the water volume through the leakage metering device 41.

[0086] The controller can be designed as a touch screen operation, which can provide intuitive water pump on / off and pressure settings, control options and settings for flow, pressure and water loss measurement and recording, and customized reports. It allows users to generate reports in different formats including data charts and trend analysis according to their needs, such as water loss over time curves, pipe network flow and pressure over time curves, etc., to meet data analysis needs in different scenarios.

[0087] The system of the present invention organically combines the controller with the water supply network. The controller can control multiple water supply links at the same time, has the functions of system data storage, processing and visualization, and has strong operability.

[0088] The present invention Figure 1 In the embodiment, the variable topology pipeline assembly 11 and the replaceable pipeline assembly 12 can both be made of stainless steel pipes and connected by welding. The fixed section 121 and the replaceable section 122 can be connected by flanges.

[0089] Figure 2In the embodiment, the length of the variable topology pipe assembly 11 can be selected to be 0.5 m or 1 m, and the pipe diameter is DN50. The length of the replaceable section 122 can be 0.5 m, and the pipe diameter is DN50.

[0090] In this embodiment, the flow meter sensitivity is selected to be 0.001 L / s, and the pressure meter sensitivity is selected to be 0.001 MPa.

[0091] Figure 3 The volume of the primary water supply tank 2 is 8m 3 , through the opening and closing control of the valves corresponding to the two primary water inlet ends, the multi-source pumping flow water supply in the actual water supply network is simulated.

[0092] Figure 4 The volume of the secondary water supply tank 3 is 2m 3 , by opening and closing the secondary return water supply valve, the gravity flow water supply in the actual water supply network is simulated.

[0093] Figure 5 In the figure, the return water pump head corresponding to one return water outlet is 12m, and the flow rate is greater than the sum of the maximum flow rates of the two water supply pumps 21 and the maximum flow rate of the gravity flow that can be simulated by the secondary water supply tank 3; the return water pump head corresponding to another return water outlet is 27m, and the flow rate is greater than the sum of the maximum flow rates of the two water supply pumps 21 and the maximum flow rate of the gravity flow that can be simulated by the secondary water supply tank 3.

[0094] Figure 6 In the embodiment, the guide ring 411 is made of tempered glass to adapt to different liquid media, improve the durability of the device, and reduce the measurement error caused by the wear of the guide ring material. The annular container 412 has a volume of 50L, the mass sensor 413 has a sensitivity of 0.001g, and the density meter 414 has a sensitivity of 0.001kg / m 3 .

[0095] Example:

[0096] After comprehensive consideration of the size of the test site, the power of the water pump, and the topological structure of the urban water supply network to be simulated, Figure 1 and Figure 2 The connection structure is assembled and installed, the main valve 111 is fully opened, and the leakage metering device 41 is placed Figure 1 and Figure 2 Under the pipe leak at A in the middle;

[0097] Connect the water source, raise the primary water supply tank 2 and the secondary water supply tank 3 to the highest water level, close the main valve 111 on the variable topology pipeline assembly 11 where the water outlet of the water peripheral pipeline is located, open the valve on the primary water inlet end pipeline and the valve on the secondary water inlet end pipeline, and simulate the multi-source water supply of two pumping flows and one gravity flow;

[0098] The sealing cover is controlled to be closed, and the primary water supply pump 21 is opened after the pressure is set, so that the entire water supply network 1 is filled with water. Water leaks from point A to the annular container 412, and the test begins;

[0099] During the test, when the water level in the recovery water tank 5 reaches the highest level, the controller turns on the return water pump; when the water level reaches the lowest level, the return water pump is turned off; and the controller records the remote transmission data of each sensor.

[0100] The water supply pump is shut down in the following two cases, and the single test ends:

[0101] 1) After the test is completed, turn off the primary water supply pump 21;

[0102] 2) The controller monitors the water levels in each water tank and the annular container 412 online based on the corresponding water level sensors, and turns off the primary water supply pump 21 when the water level exceeds the maximum water level.

[0103] After a single test is completed, close the valves on the first-level water inlet pipe and the valves on the second-level water inlet pipe, open the main valve 111 on the variable topology pipe assembly 11 where the water outlet of the water peripheral pipe is located, drain the water in the water pipe network 1, wait for the return water pump to stop working, indicating that there is no remaining water in the water pipe network 1, close the valve of the corresponding pipe at A, and replace the replaceable section 122; the controller controls the opening of the sealing cover to discharge the water inside the annular container 412 and finally flow to the recovery water tank 5; after the water inside the annular container 412 is emptied, control the sealing cover to close, repeat the above operation, and then conduct the next test.

[0104] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary 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 the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with a single embodiment may be used in other described embodiments.

Claims

1. A variable topology pipe network leakage simulation test system, characterized in that: include: A water pipe network (1) comprises a plurality of variable topology pipe assemblies (11) and a plurality of replaceable pipe assemblies (12); the plurality of variable topology pipe assemblies (11) are connected in sequence to form a peripheral water pipe; the plurality of replaceable pipe assemblies (12) are cross-network connected to form a water branch and are connected to the peripheral water pipe; a main valve (111) is provided on each variable topology pipe assembly (11), and a sensor for monitoring the water supply status is provided on the selected variable topology pipe assembly (11); the replaceable pipe assembly (12) comprises fixed sections (121) at both ends and a replaceable section (122) connected in the middle; a branch valve (1211) is provided on the fixed section (121); a water loss point A is simulated through the replaceable section (122); A primary water supply tank (2) is used to provide primary water supply to the water pipe network (1) and to supply water to all passages of the water pipe network (1); A secondary water supply tank (3) is used to provide secondary water supply to the water pipe network (1) at a set height and to supply water to all passages of the water pipe network (1); A water loss monitoring device (4) is used to monitor and collect the water loss at the water loss point A; The water recovery tank (5) is used to recover the outflow water of the water pipe network (1) and the collected water of the water loss monitoring device (4) by gravity at a set negative height, and supply water to the primary water supply tank (2) and the secondary water supply tank (3) to form a water supply loop.

2. The variable topology pipe network leakage simulation test system according to claim 1 is characterized in that: The sensors for monitoring the water supply status include a flow meter, a pressure gauge and a water quality sensor.

3. The variable topology pipe network leakage simulation test system according to claim 1 is characterized in that: A controller is used to control the switching of the main valve (111) and the branch valve (1211) to form different expected water supply paths.

4. The variable topology pipe network leakage simulation test system according to claim 3 is characterized in that: The water peripheral pipeline has two primary water inlet ends, one secondary water inlet end and a water outlet, and flow meters are arranged on the variable topology pipeline components (11) corresponding to the two primary water inlet ends and the secondary water inlet end; The primary water supply tank (2) comprises two primary water outlets and two primary water inlets, wherein the two primary water outlets are respectively connected to a corresponding primary water inlet via a primary water supply pump (21); one primary water inlet is used to connect to a return water outlet of a recovery water tank (5), and the other primary water inlet is used to connect to a water source.

5. The variable topology pipe network leakage simulation test system according to claim 4 is characterized in that: The secondary water supply tank (3) comprises two secondary water inlets and one secondary water outlet, the secondary water outlets supply water to the water pipe network (1) through the secondary water inlet end, one secondary water inlet is used to connect to another return water outlet of the recovery water tank (5), and the other secondary water inlet is used to connect to a water source; A flow meter is arranged on the variable topology pipeline component (11) corresponding to the secondary water inlet end.

6. The variable topology pipe network leakage simulation test system according to claim 5 is characterized in that: The water loss monitoring device (4) comprises a water loss metering device (41) and a drainage pipeline (42). The water loss metering device (41) is used to measure and recover the water loss at the water loss point A, and is connected to the collection water input port of the recovery water tank (5) through the drainage pipeline (42).

7. The variable topology pipe network leakage simulation test system according to claim 6 is characterized in that: The recovery water tank (5) also has a water outlet input port of the water pipe network, which is used to communicate with the water outlet of the water pipe network (1); Return water pumps are respectively arranged on the water supply pipelines for supplying water to the primary water supply tank (2) and the secondary water supply tank (3) through the two return water outlets of the recovery water tank (5).

8. The variable topology pipe network leakage simulation test system according to claim 7 is characterized in that: The leakage metering device (41) comprises a guide ring (411), an annular container (412), a mass sensor (413), a density meter (414), a mobile base (415) and a collected water level sensor (416). The guide ring (411) is connected to the upper port of the annular container (412), and a collected water level sensor (416) is arranged in the annular container (412); a drainage port is arranged at the bottom end of the annular container (412), and a sealing cover plate is arranged corresponding to the drainage port; the drainage port is connected to the drainage pipeline (42); A mass sensor (413) and a density meter (414) are arranged on the movable base (415) for measuring the annular container (412) on the movable base (415).

9. The variable topology pipe network leakage simulation test system according to claim 8, characterized in that: The maximum water level in both the primary water supply tank (2) and the secondary water supply tank (3) is monitored by water level sensors; Two water level sensors are arranged in the recovery water tank (5) to monitor the highest water level and the lowest water level respectively.

10. The variable topology pipe network leakage simulation test system according to claim 9, characterized in that: The controller performs anti-overflow control of water inflow to the primary water supply tank (2) and the secondary water supply tank (3) according to the maximum water level monitoring results of the primary water supply tank (2) and the secondary water supply tank (3); The controller controls the switch of the sealing cover plate according to the measurement result of the collected water level sensor (416), so as to realize the conversion between the measurement mode and the drainage mode of the leakage measurement device (41); The controller controls the return water pump according to the monitoring result of the water level sensor of the recovery water tank (5), so as to realize overflow prevention and water shortage operation control of the recovery water tank (5); The controller controls the primary water supply pump (21) according to the water supply demand of the water pipe network (1); The controller controls the corresponding main valve (111) according to the measurement result of the flow meter on the variable topology pipeline component (11) corresponding to the secondary water inlet end, and performs gravity water supply simulation of the secondary water supply tank (3); The controller processes the data of the water loss according to the monitoring results of the sensor for monitoring the water supply status, the measurement results of the flow meter on the variable topology pipeline assembly (11) corresponding to all the water inlet ends of the water peripheral pipeline, and the calculation results of the mass sensor (413) and the density meter (414).

Images