Circulation pipeline system and circulation pipeline control method

Abstract

The present invention relates to the technical field of circulating pipeline operation monitoring, and in particular to a circulating pipeline system and a circulating pipeline control method. The present invention discloses a circulating pipeline system, which is provided with an inlet and outlet control unit controlled by a controller. The controller receives inlet and outlet flow signals. When the flow difference is large, the controller outputs a command to close the inlet and outlet of the working pipeline to prevent the situation from escalating. In an embodiment of the present invention, a leakage locating device is also laid on the working pipeline. Through the leakage locating device in the system, the leakage point and the seepage point in the working pipeline can be located, which reduces the workload of troubleshooting and eliminates hidden dangers in the bud. A plurality of valves are provided on the water inlet side and the water return side of the working pipeline, which can realize the maintenance and replacement of parts on the water inlet side and the water return side without affecting the working state of the working pipeline. The downtime is reduced and the operating efficiency of maintenance and inspection is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating pipeline operation monitoring, and in particular to a circulating pipeline system and a circulating pipeline control method. Background Art

[0002] Many industrial electrical equipment require pipeline circulating water cooling devices to cool down the heating or temperature control components inside the equipment. Due to different equipment process principles, the internal circulation pipelines of the equipment will use different materials such as steel, copper, aluminum, PVC, PFA, etc. The docking between different materials, the heat exchange of heating components, and various ionic impurities in the water will have a certain degree of destructive effect on the pipeline. The circulating water cools the heating components through the heat exchange principle, the temperature of the nearby condensed water increases, and the very small amount of bicarbonate impurities in the water are decomposed by heat to form insoluble precipitates that adhere to the inner arm of the pipeline. As time accumulates, the scale increases, the cooling efficiency is further reduced, and eventually the pipeline is blocked. The increase in the service life of the equipment will cause the non-metallic material pipe skin to age and crack. The corrosive characteristics of pure water and the reaction of a small amount of ions in the water with the metal cause a certain degree of corrosion inside the metal pipeline. Coupled with mechanical vibration and human factors, the joints are loose, the pipe wall is damaged, and the pipeline is broken and collapsed, causing the probability of leakage and water leakage to increase. Because pipe blockage and leakage problems have become one of the factors that cannot be ignored for the safe operation of circulating water.

[0003] There are two types of leakage inside the equipment: 1. Large flow of water due to loose joints and sudden breakage of pipelines due to aging; 2. Minor leakage due to aging, cracking, pipe wall corrosion, etc. Equipment manufacturers generally use additional leakage detection devices. When water or unknown liquid is detected at a specific location inside the equipment, an alarm will be triggered to shut down. However, the circulating water system in the plant is still in operation, and leakage and water leakage have always existed. Due to the improvement of automation level and the popularization of unmanned workshops, although there is a regular inspection and maintenance system for factory personnel. For sudden water leakage accidents caused by broken water pipes inside the equipment, real-time monitoring and timely response cannot be made, and the circulating water supply pipeline is cut off, resulting in one or more nearby equipment being soaked in water from time to time, which has a great impact on property losses. For minor pipeline leakage or pipe wall seepage failures, the performance is not obvious, and it is more difficult for personnel to detect during inspections. Even long-term leakage cannot trigger the action of the leakage detection device. Even if the alarm is triggered, when troubleshooting, due to the hidden leakage point, the pipelines are mixed in series and parallel inside the equipment, and are complicated. It is difficult to accurately and quickly locate the fault point.

[0004] The blockage of scale in the equipment pipeline is also a problem that equipment with condensation circulation function must face. Every time the pipeline is blocked, various measures are needed to dredge the pipeline. If the pipeline is completely blocked and cannot be dredged, the equipment must be disassembled and the blocked module must be replaced. Therefore, monitoring the pipeline status in advance plays a positive role in maintaining the safe operation of circulating water.

[0005] Based on this, it is necessary to develop and design a circulation pipeline system. Summary of the invention

[0006] The embodiments of the present invention provide a circulation pipeline system and a circulation pipeline control method, which are used to solve the problem that the pipeline water seepage problem in the prior art is not easy to be discovered.

[0007] In a first aspect, an embodiment of the present invention provides a circulation pipeline system, comprising:

[0008] Working pipeline, inlet flow unit, outlet flow unit, inlet and outlet control units and controller;

[0009] The controller is electrically connected to the inlet flow unit, the outlet flow unit and the inlet and outlet control unit;

[0010] The inlet and outlet control unit is connected to the inlet and outlet of the working pipeline. When the inlet and outlet control unit is closed, the inlet and outlet of the working pipeline are closed.

[0011] The inlet flow unit is serially connected to the inlet of the working pipeline, and the outlet flow unit is serially connected to the outlet of the working pipeline;

[0012] The inlet flow unit is used to output the inlet flow signal of the working pipeline and control the inlet flow of the working pipeline; the outlet flow unit is used to output the outlet flow signal of the working pipeline;

[0013] The controller outputs a signal indicating control of the flow of the working pipeline according to the inlet flow signal, and outputs a signal indicating that the inlet and outlet of the working pipeline are closed according to the inlet flow signal and the outlet flow signal.

[0014] In a possible implementation, the circulation pipeline system further includes: a liquid leakage detection unit and a liquid leakage sensor, wherein the liquid leakage sensor and the liquid leakage detection unit are electrically connected to the controller respectively;

[0015] The liquid leakage detection unit comprises: a plurality of liquid leakage positioning devices;

[0016] The leakage positioning device comprises a soluble substance, a wire insulated from each other and a resistance wire, wherein the soluble substance is arranged between the wire and the resistance wire, and when the soluble substance is dissolved, the wire is electrically connected to the resistance wire at the position where the soluble substance is dissolved;

[0017] The plurality of leakage locating devices are sequentially laid along the outer surface of the working pipeline, and are electrically connected to form a topological structure identical to that of the working pipeline;

[0018] The controller determines the leakage point of the working pipeline according to the topological structure and the resistance value of the leakage detection unit;

[0019] The liquid leakage sensor is used to collect a liquid leakage signal, and the controller outputs a signal instructing to close the working pipeline according to the liquid leakage signal.

[0020] In a possible implementation, the inlet flow unit includes: a flow regulating valve and a water inlet flow meter, and the inlet and outlet control unit includes: a first valve, a water inlet solenoid valve, a second valve and a third valve;

[0021] The outlet of the first valve is connected to the inlet of the flow regulating valve, the outlet of the flow regulating valve is connected to the inlet of the water inlet flowmeter, the outlet of the water inlet flowmeter is connected to the inlet of the water inlet solenoid valve, the outlet of the water inlet solenoid valve is connected to the inlet of the second valve, and the outlet of the second valve is connected to the inlet of the working pipeline; the inlet of the third valve is connected to the inlet of the first valve, and the outlet of the third valve is connected to the outlet of the second valve.

[0022] In a possible implementation, the outlet flow unit includes: a return water flow meter;

[0023] The inlet and outlet control unit further includes: a fourth valve, a return water solenoid valve, a fifth valve and a sixth valve;

[0024] The inlet of the fifth valve is connected to the outlet of the working pipeline, the outlet of the fifth valve is connected to the inlet of the return water solenoid valve, the outlet of the return water solenoid valve is connected to the inlet of the return water flowmeter, the outlet of the return water flowmeter is connected to the inlet of the fourth valve, the inlet of the sixth valve is connected to the inlet of the fifth valve, and the outlet of the sixth valve is connected to the outlet of the fourth valve.

[0025] The controller is electrically connected to the water inlet solenoid valve and the water return solenoid valve respectively;

[0026] The controller outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the inlet flow signal and the outlet flow signal, and / or outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the topological structure and the resistance value of the leakage detection unit.

[0027] In a possible implementation, the inlet and outlet control unit further includes: a Y-type filter and an air eliminator;

[0028] The Y-type filter and the degasser are connected in series between the first valve and the water inlet solenoid valve, the inlet of the Y-type filter is connected to the outlet of the first valve, the outlet of the Y-type filter is connected to the inlet of the flow regulating valve, the inlet of the degasser is connected to the outlet of the flow regulating valve, and the outlet of the degasser is connected to the inlet of the water inlet flowmeter.

[0029] In a possible implementation, the inlet and outlet control unit further includes: a check valve;

[0030] The check valve is connected in series between the fourth valve and the return flow meter, the inlet of the check valve is communicated with the outlet of the return flow meter, and the outlet of the check valve is communicated with the inlet of the fourth valve.

[0031] In a second aspect, an embodiment of the present invention provides a circulation pipeline control method, which is applied in a possible implementation method of the first aspect, including:

[0032] Acquire flow data and resistance value, wherein the flow data represents the inlet and return water flow of the working pipeline, and the resistance value represents the resistance value of the leakage detection unit;

[0033] When the flow data exceeds a first condition, closing the inlet and outlet of the working pipeline, wherein the first condition represents the difference between the inlet and return water flow rates of the working pipeline;

[0034] When the flow rate data is lower than the first condition, if the liquid leakage sensor is triggered, an alarm signal is output;

[0035] When the liquid leakage sensor is not triggered, if the resistance value is lower than a threshold value, determining the location of the leakage point according to the resistance value;

[0036] When the resistance value is not lower than the threshold value, a signal for adjusting the flow regulating valve is output according to a preset flow rate.

[0037] In a possible implementation, determining the location of the leakage point according to the resistance value includes:

[0038] Respectively obtaining the resistance values ​​at both ends of the leakage detection unit;

[0039] The location of the leakage point is determined according to the topological structure, the resistivity of the resistance wire and the resistance values ​​at both ends of the leakage detection unit.

[0040] In a third aspect, an embodiment of the present invention provides a terminal, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, it implements the steps of the method described in the second aspect or any possible implementation method of the second aspect.

[0041] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the second aspect or any possible implementation of the second aspect are implemented.

[0042] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0043] The embodiment of the present invention discloses a circulation pipeline system, which is provided with an inlet and outlet control unit controlled by a controller. The controller receives inlet and outlet flow signals. When the flow difference is large, the controller outputs a command to close the inlet and outlet of the working pipeline to prevent the situation from escalating.

[0044] The implementation manner of the present invention also lays a leakage locating device on the working pipeline. Through the leakage locating device in the system, the leakage point and seepage point in the working pipeline can be located, reducing the workload of troubleshooting and eliminating hidden dangers in the bud.

[0045] The embodiment of the present invention also provides a circulation pipeline leakage positioning device, which is provided with a resistance wire and a conductor, and the resistance wire and the conductor are fixed to the pipeline through a fixing frame. When the pipeline leaks, the resistance wire and the conductor that were originally insulated from each other are electrically connected, thereby changing the resistance value between the resistance wire and the conductor. When multiple positioning devices are provided on the pipeline, the leakage point position of the pipeline can be determined according to the resistance value, thereby reducing the work of finding the leakage point of the pipeline and improving the efficiency of checking the leakage point of the pipeline.

[0046] The embodiment of the present invention also discloses a circulation pipeline leakage positioning system, which is provided with a controller and a leakage positioning device. The leakage positioning device is laid according to the pipeline topology structure and is finally electrically connected to the controller. The controller determines the location of the leakage point by analyzing the resistance values ​​of multiple leakage positioning devices on the water inlet side and the water return side of the pipeline. The embodiment of the present invention also has an inlet flow meter and a return flow meter, which calculate the difference between the inlet and return flow rates to determine whether there is a leak in the pipeline, and when it is determined that a leak has occurred, the inlet and return solenoid valves are closed to prevent the accident from expanding. Therefore, when a leak occurs, timely measures can be taken to ensure the safety of equipment operation.

[0047] The embodiment of the present invention also discloses a method for locating a liquid leakage in a circulation pipeline. By obtaining the resistance values ​​of the inlet and outlet in the corresponding topological structure and the interval where the resistance value is located, three different sections are divided. When the inlet resistance value is less than the resistance value of the positioning device in the first pipeline, the position of the leakage point from the inlet can be determined by resistivity. When the outlet resistance value is less than the resistance value of the positioning device in the fourth pipeline, the position of the leakage point from the outlet can be determined by resistivity. When the inlet and outlet resistance values ​​are respectively greater than the corresponding limiting resistance values, the leakage point position can be determined by topological analysis, with high positioning accuracy, reducing the difficulty of troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0049] Figure 1 is a schematic diagram of a liquid leakage locating device provided in an embodiment of the present invention;

[0050] Figure 2 is a schematic diagram of a circulation piping system provided in an embodiment of the present invention;

[0051] Figure 3 It is a topological structure diagram of various circulation pipelines provided by the embodiments of the present invention;

[0052] Figure 4 It is a typical circulation pipeline topology diagram provided by an embodiment of the present invention;

[0053] Figure 5 It is a flow chart of a method for locating a liquid leakage in a circulation pipeline system provided by an embodiment of the present invention;

[0054] Figure 6 is a flow chart of a circulation pipeline control process provided by an embodiment of the present invention;

[0055] Figure 7 It is a functional block diagram of a terminal provided by an embodiment of the present invention.

[0056] In the figure:

[0057] 101 wire;

[0058] 102 resistance wire;

[0059] 103 filter paper;

[0060] 104 soluble;

[0061] 105 copper sheet;

[0062] 106 spring retainer;

[0063] 107 circulation pipeline;

[0064] 201 first valve;

[0065] 202 Y-type filter;

[0066] 203 flow control valve;

[0067] 204 eliminator;

[0068] 205 water inlet flow meter;

[0069] 206 water inlet solenoid valve;

[0070] 207 second valve;

[0071] 208 Fourth Valve;

[0072] 209 check valve;

[0073] 210 return water flow meter;

[0074] 211 return water solenoid valve;

[0075] 212 Fifth Valve;

[0076] 213 Third valve.

[0077] 214 6th valve;

[0078] 215 first leakage sensor;

[0079] 216 second liquid leakage sensor;

[0080] 217 Status display;

[0081] 218 Controller;

[0082] 219 Working pipeline. DETAILED DESCRIPTION

[0083] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary details.

[0084] In order to make the purpose, technical solutions and advantages of the present invention more clear, a specific implementation method will be described below in conjunction with the accompanying drawings.

[0085] The following is a detailed description of an embodiment of the present invention. This example is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0086] A first aspect of an embodiment of the present invention provides a circulation pipeline system, comprising:

[0087] Working pipeline, inlet flow unit, outlet flow unit, inlet and outlet control units and controller;

[0088] The controller is electrically connected to the inlet flow unit, the outlet flow unit and the inlet and outlet control unit;

[0089] The inlet and outlet control unit is connected to the inlet and outlet of the working pipeline. When the inlet and outlet control unit is closed, the inlet and outlet of the working pipeline are closed.

[0090] The inlet flow unit is serially connected to the inlet of the working pipeline, and the outlet flow unit is serially connected to the outlet of the working pipeline;

[0091] The inlet flow unit is used to output the inlet flow signal of the working pipeline and control the inlet flow of the working pipeline; the outlet flow unit is used to output the outlet flow signal of the working pipeline;

[0092] The controller outputs a signal indicating control of the flow of the working pipeline according to the inlet flow signal, and outputs a signal indicating that the inlet and outlet of the working pipeline are closed according to the inlet flow signal and the outlet flow signal.

[0093] In some embodiments, the circulation pipeline system further includes: a liquid leakage detection unit and a liquid leakage sensor, wherein the liquid leakage sensor and the liquid leakage detection unit are electrically connected to the controller respectively;

[0094] The liquid leakage detection unit comprises: a plurality of liquid leakage positioning devices;

[0095] The leakage positioning device comprises a soluble substance, a wire insulated from each other and a resistance wire, wherein the soluble substance is arranged between the wire and the resistance wire, and when the soluble substance is dissolved, the wire is electrically connected to the resistance wire at the position where the soluble substance is dissolved;

[0096] The plurality of leakage locating devices are sequentially laid along the outer surface of the working pipeline, and are electrically connected to form a topological structure identical to that of the working pipeline;

[0097] The controller determines the leakage point of the working pipeline according to the topological structure and the resistance value of the leakage detection unit;

[0098] The liquid leakage sensor is used to collect a liquid leakage signal, and the controller outputs a signal instructing to close the working pipeline according to the liquid leakage signal.

[0099] For example, Figure 1 The schematic diagram of the circulation pipeline leakage positioning device provided by the embodiment of the present invention. The structure of the leakage positioning device is as follows Figure 1 As shown, the wire 101 is a bare copper wire, and forms a signal line with the resistance wire 102. The resistance wire 102 is made of nickel-chromium alloy (Cr20Ni80) with a wire diameter of 0.1m and a resistance of 138.8Ω / m. The wire 101 is a single-core copper wire with a wire diameter of 0.5m. The resistivity of the copper wire at room temperature is 1.7*10-8Ω / m. Compared with the resistance wire, the resistance can be approximately 0Ω / m.

[0100] Filter paper 103 for insulation is arranged above the exposed part of the wire 101 and the resistance wire 102, and a soluble body 104, such as NaCl crystal, is arranged below. A copper sheet 105 is arranged below the soluble body 104, and spring fixing frames 106 are arranged at both ends of the copper sheet 105 for fixing to a pipeline 107 by hanging or bonding.

[0101] Once water seepage occurs somewhere in the circulation pipeline 107, the NaCl crystals dissolve in water, and under the force of the spring fixing frame 106, the copper sheet 105 short-circuits the copper wire and the nickel-chromium alloy wire. At this time, at the end of the wire 101 and the resistance wire 102 away from the soluble body 104, the input resistance of the measuring port changes from infinity to a certain value.

[0102] In some application scenarios, a positioning network can be constructed by using multiple positioning devices according to the embodiments of the present invention, such as Figure 4 As shown, it shows a plurality of devices of the present invention arranged along a pipeline. Along the circulating water pipeline, one side of the pipeline is arranged in parallel, and a water leakage detector device is installed between the copper wire and the resistance wire 102 every 5-10 cm, and a protective film is wrapped outside the device. The copper wire, the resistance wire 104 and the circulating water pipe 107 are fixed together. The port close to the first pipe 401 and the port close to the fourth pipe 404 can be connected to the controller through a relay, and the resistance value measured from the end of the first pipe 401 and the resistance value measured from the end of the fourth pipe 404 are respectively obtained. According to the two end resistance values, the location of the leakage point is determined.

[0103] The embodiment of the circulation pipeline leakage positioning device of the present invention is provided with a resistance wire 102 and a wire 101, and the resistance wire 102 and the wire 101 are fixed on the pipeline 107 through a fixing frame. When the pipeline 107 leaks, the resistance wire 102 and the wire 101, which are originally insulated from each other, are electrically connected, thereby changing the resistance value between the resistance wire 102 and the wire 101. When a plurality of positioning devices are provided on the pipeline 107, the leakage point position of the pipeline can be determined according to the resistance value, thereby reducing the work of finding the leakage point of the pipeline 107 and improving the efficiency of checking the leakage point of the pipeline 107.

[0104] In some embodiments, the inlet flow unit includes: a flow regulating valve and a water inlet flow meter, and the inlet and outlet control unit includes: a first valve, a water inlet solenoid valve, a second valve and a third valve;

[0105] The outlet of the first valve is connected to the inlet of the flow regulating valve, the outlet of the flow regulating valve is connected to the inlet of the water inlet flowmeter, the outlet of the water inlet flowmeter is connected to the inlet of the water inlet solenoid valve, the outlet of the water inlet solenoid valve is connected to the inlet of the second valve, and the outlet of the second valve is connected to the inlet of the working pipeline; the inlet of the third valve is connected to the inlet of the first valve, and the outlet of the third valve is connected to the outlet of the second valve.

[0106] In some embodiments, the outlet flow unit includes: a return flow meter;

[0107] The inlet and outlet control unit further includes: a fourth valve, a return water solenoid valve, a fifth valve and a sixth valve;

[0108] The inlet of the fifth valve is connected to the outlet of the working pipeline, the outlet of the fifth valve is connected to the inlet of the return water solenoid valve, the outlet of the return water solenoid valve is connected to the inlet of the return water flowmeter, the outlet of the return water flowmeter is connected to the inlet of the fourth valve, the inlet of the sixth valve is connected to the inlet of the fifth valve, and the outlet of the sixth valve is connected to the outlet of the fourth valve.

[0109] The controller is electrically connected to the water inlet solenoid valve and the water return solenoid valve respectively;

[0110] The controller outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the inlet flow signal and the outlet flow signal, and / or outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the topological structure and the resistance value of the leakage detection unit.

[0111] In some embodiments, the inlet and outlet control unit further comprises: a Y-type filter and an air eliminator;

[0112] The Y-type filter and the degasser are connected in series between the first valve and the water inlet solenoid valve, the inlet of the Y-type filter is connected to the outlet of the first valve, the outlet of the Y-type filter is connected to the inlet of the flow regulating valve, the inlet of the degasser is connected to the outlet of the flow regulating valve, and the outlet of the degasser is connected to the inlet of the water inlet flowmeter.

[0113] In some embodiments, the inlet and outlet control unit further includes: a check valve;

[0114] The check valve is connected in series between the fourth valve and the return flow meter, the inlet of the check valve is communicated with the outlet of the return flow meter, and the outlet of the check valve is communicated with the inlet of the fourth valve.

[0115] For example, Figure 2 As shown, it shows a circulation pipeline system, and the water inlet side is respectively provided with:

[0116] The first valve 201 , the Y-type filter 202 , the flow regulating valve 203 , the degasser 204 , the water inlet flow meter 205 , the water inlet solenoid valve 206 , the second valve 207 , and the third valve 213 .

[0117] The return water side is provided with: a fourth valve 208 , a check valve 209 , a return water flow meter 210 , a return water solenoid valve 211 , a fifth valve 212 , and a sixth valve 214 .

[0118] Between the return side and the inlet side is the main working pipeline 219 part, in which a plurality of positioning devices connected in sequence are laid along the pipeline.

[0119] In the figure, the first valve 201 cooperates with the second valve 207. When a part between the two fails, the two valves can be closed and the third valve 213 can be opened to replace the parts between the two. For example, when the water inlet solenoid valve 206 fails, the first valve 201 and the second valve 207 can be closed and the third valve 213 can be opened to ensure water supply to the working pipeline 219 while replacing the solenoid valve.

[0120] A Y-type filter 202 , a flow regulating valve 203 , and a gas eliminator 204 are also provided on the water inlet side, which are used to filter impurities in the working pipeline 219 , regulate the flow of the working pipeline 219 , and remove gas in the working pipeline 219 , respectively.

[0121] The fourth valve 208 and the fifth valve 212 provided on the return water side cooperate with the sixth valve 214 to realize the maintenance and replacement of the parts between the fourth valve 208 and the fifth valve 212 without affecting the working state of the working pipeline 219. For example, when replacing the return water solenoid valve 211, the return water solenoid valve can be replaced by opening the sixth valve 214 and closing the fourth valve 208 and the fifth valve 212.

[0122] In some application scenarios, a check valve 209 is further provided on the return water side to prevent return water pressure from being generated on the return water side and flowing back into the working pipeline 219 .

[0123] In some scenarios, two liquid leakage sensors are provided: a first liquid leakage sensor 215 and a second liquid leakage sensor 216 .

[0124] Liquid leakage sensors can have many forms, one of which is to monitor using the principle of liquid conductivity, which is called contact leakage monitoring. Through the leakage sensing cable or monitoring probe, when in an environment with liquid, the two cables and two metal probes will be connected. After the sensor senses that there is a place that is connected, it will automatically send a signal and transmit an alarm message. Another is non-contact monitoring, which uses the principle of refraction and reflection of light in different medium cross-sections for detection, and senses the liquid situation through the built-in photoelectric receiver and LED light of the sensor. In the prior art, the second application is more. In addition, some systems are also provided with a status display 217 to indicate whether there is a leak and the location of the leak.

[0125] There may be various topological structures formed by multiple positioning devices, such as Figure 3 The series connection mode 301, the parallel connection mode 302, the first series-parallel hybrid mode 303 and the second series-parallel hybrid mode 304 are shown. It can be seen that no matter which topology structure is used, two measuring terminals are provided, corresponding to the water inlet side and the water return side respectively.

[0126] In some application scenarios, if there is a relatively obvious leak, for example, a pipe is broken, it can be determined whether there is a pipe leak by calculating the difference between the data collected by the inlet flow meter 205 and the return flow meter 210. If there is a leak, the inlet solenoid valve 206 and the return solenoid valve 211 are closed to prevent the accident from escalating.

[0127] If the flow rate is small, it can be judged by the first leakage sensor 215 and the second leakage sensor 216. When the two leakage sensors are triggered, it means there is leakage, and the controller 218 outputs a signal indicating an alarm, and also outputs a signal to control the closing of the water inlet solenoid valve 206 and the water return solenoid valve 211 to prevent the accident from expanding.

[0128] The embodiment of the present invention is provided with a controller and a leakage locating device. The leakage locating device is laid according to the pipeline topology and is finally electrically connected to the controller. The controller determines the location of the leakage point by analyzing the resistance values ​​of multiple leakage locating devices on the water inlet side and the water return side of the pipeline. The embodiment of the present invention is also provided with an inlet flow meter and a return flow meter. By calculating the difference between the inlet and return flow rates, it is determined whether there is a leak in the pipeline. When it is determined that a leak occurs, the inlet and return solenoid valves are closed to prevent the accident from expanding. Therefore, when a leak occurs, timely measures can be taken to ensure the safety of equipment operation.

[0129] like Figure 5 As shown, in a second aspect, an embodiment of the present invention provides a circulation pipeline control method, which is applied to the circulation pipeline system as described in the first aspect, comprising:

[0130] Step 501, acquiring flow data and resistance value, wherein the flow data represents the inlet and return water flow of the working pipeline, and the resistance value represents the resistance value of the leakage detection unit;

[0131] Step 502, when the flow data exceeds a first condition, closing the inlet and outlet of the working pipeline, wherein the first condition represents the difference between the inlet and return water flow rates of the working pipeline;

[0132] Step 503, when the flow data is lower than the first condition, if the liquid leakage sensor is triggered, an alarm signal is output;

[0133] Step 504, when the liquid leakage sensor is not triggered, if the resistance value is lower than a threshold value, determining the location of the leakage point according to the resistance value;

[0134] Step 505: When the resistance value is not lower than the threshold value, a signal for adjusting the flow control valve is output according to a preset flow rate.

[0135] In some embodiments, determining the location of the leakage point according to the resistance value includes:

[0136] Respectively obtaining the resistance values ​​at both ends of the leakage detection unit;

[0137] The location of the leakage point is determined according to the topological structure, the resistivity of the resistance wire and the resistance values ​​at both ends of the leakage detection unit.

[0138] For example, Figure 4 As shown, the figure shows a pipeline topology structure, the first pipeline 401 and the fourth pipeline 404 are respectively arranged at the inlet and outlet of the circulation pipeline, the second pipeline 403 and the third pipeline 404 are connected in parallel and arranged between the first pipeline 401 and the fourth pipeline 404.

[0139] This pipeline is relatively Figure 3 The piping shown is typical. Figure 3 The various topologies shown can be Figure 4 The topological structure shown is obtained after simplification and can be applied to various scenarios for analyzing the location of pipeline leaks.

[0140] For example, the flowchart implemented in this embodiment is as follows: Figure 5 , for example Figure 4 For the leakage point analysis shown in the figure, according to the resistor parallel calculation formula:

[0141]

[0142] R bc is the resistance value between bc in the figure, is the resistance value of segment L2 in the figure, It is the resistance value of segment L3 in the figure.

[0143] According to the series resistance calculation formula:

[0144] R ad =R ab +R bc +R cd

[0145] R ad is the resistance value between ad in the figure, R ab is the resistance value between a and b in the figure, R bc is the resistance value between b and c in the figure, R cd is the resistance value between cd in the figure.

[0146] Assume the leak point is on branch L1, d ax It is the distance from point a to the leakage point x on branch L1.

[0147] Then the input resistance of port A is:

[0148] R A =d ax *ρ

[0149] ρ is the resistivity. For example, the unit resistance of nickel-chromium alloy is ρ=138.8Ω / m (0.1m wire diameter).

[0150] so,

[0151] R A ≤R ab ≤R ad

[0152] Therefore, when the input resistance of the measurement port A is less than R ab When the water leakage point of the pipeline is detected, it can be determined that it is on L1.

[0153] The leak location can be calculated as

[0154]

[0155] Assume the leak point is on branch L4, d dx is the distance from point d on branch L4 to the leakage point x. Similarly, based on the input resistance of port B, the leakage point position can be calculated as

[0156]

[0157] In the formula, R B is the outlet resistance.

[0158] Assume that the leak point is at L2 and L3 and the length of the combination is l 23 The closed loop, d bx It is the distance from point b to the leakage point x along the clockwise direction of the loop with b as the origin.

[0159]

[0160] Substituting the known quantities into the equation we get:

[0161]

[0162] According to the parallel circuit calculation formula, we can know

[0163]

[0164] Therefore, the equation has a solution, which is:

[0165]

[0166] Similarly, d dx is the distance from point d to the leakage point x along the clockwise direction of the loop with d as the origin. According to the input resistance of port B, the solution is:

[0167]

[0168] When L2≠L3, substitute the obtained solution into the equation,

[0169]

[0170] The solution that satisfies any equation is the actual leakage location finally obtained.

[0171] Finally, based on the above circulation pipeline control process, if it is applied in Figure 2 In the system shown in the figure, the circulation pipeline control process can be as follows Figure 6The flowchart shown in the figure. The general working process of the figure is to first judge the flow rate between the water inlet flow meter 205 and the return water flow meter 210. If the difference between the two exceeds a set value, the flow difference is obtained again after a certain delay. If the flow difference obtained again is greater than the set value, the two electromagnetic valves are closed. If the flow difference does not exceed the set value after the flow judgment of the flow meter, it is checked whether the leakage sensor is triggered. If it is triggered, an alarm is issued. If both leakage sensors are triggered, the two electromagnetic valves are closed. If neither of the two leakage sensors is triggered, the resistance value of the leakage detection unit is obtained. If the resistance value is less than the threshold value, the location of the leakage is determined through the above calculation process. If the resistance value is greater than the threshold value, it is checked whether the flow rate reaches the set value. If it does not reach the set value, the flow rate is adjusted by adjusting the flow regulating valve 203. If the flow regulating valve 203 is adjusted to the limit and still does not reach the predetermined flow rate, an alarm is issued to check whether the pipeline is blocked.

[0172] The embodiment of the present invention obtains the resistance of the inlet and outlet in the corresponding topological structure, and divides the interval where the resistance value is located into three different sections. When the inlet resistance value is less than the resistance value of the positioning device in the first pipeline, the position of the leakage point from the inlet can be determined by the resistivity. When the outlet resistance value is less than the resistance value of the positioning device in the fourth pipeline, the position of the leakage point from the outlet can be determined by the resistivity. When the inlet and outlet resistance values ​​are respectively greater than the corresponding limiting resistance values, the leakage point position can be determined by topological analysis, and the positioning accuracy is high, which reduces the difficulty of troubleshooting.

[0173] It should be understood that the order of execution of the steps in the above implementation does not imply the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation of the present invention.

[0174] Figure 7 is a functional block diagram of a terminal provided by an embodiment of the present invention. Figure 7 As shown, the terminal 7 of this embodiment includes: a processor 700 and a memory 701, wherein the memory 701 stores a computer program 702 that can be run on the processor 700. When the processor 700 executes the computer program 702, the steps in the above-mentioned circulation pipeline leakage location method and the embodiment are implemented, for example Figure 5 Steps 501 to 505 are shown.

[0175] Exemplarily, the computer program 702 may be divided into one or more modules / units, and the one or more modules / units are stored in the memory 701 and executed by the processor 700 to implement the present invention.

[0176] The terminal 7 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal 7 may include, but is not limited to, a processor 700 and a memory 701. Those skilled in the art will appreciate that Figure 7 It is only an example of terminal 7 and does not constitute a limitation on terminal 7. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0177] The processor 700 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0178] The memory 701 may be an internal storage unit of the terminal 7, such as a hard disk or memory of the terminal 7. The memory 701 may also be an external storage device of the terminal 7, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 7. Further, the memory 701 may also include both an internal storage unit and an external storage device of the terminal 7. The memory 701 is used to store the computer program and other programs and data required by the terminal. The memory 701 may also be used to temporarily store data that has been output or is to be output.

[0179] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the implementation method can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method implementation method, which will not be repeated here.

[0180] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0181] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0182] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0183] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0184] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0185] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned implementation method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps of the above-mentioned various methods and device implementation methods. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium.

[0186] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A circulation pipeline system, characterized in that: include: Working pipeline, inlet flow unit, outlet flow unit, inlet and outlet control units and controller; The controller is electrically connected to the inlet flow unit, the outlet flow unit and the inlet and outlet control unit; The inlet and outlet control unit is connected to the inlet and outlet of the working pipeline. When the inlet and outlet control unit is closed, the inlet and outlet of the working pipeline are closed. The inlet flow unit is serially connected to the inlet of the working pipeline, and the outlet flow unit is serially connected to the outlet of the working pipeline; The inlet flow unit is used to output the inlet flow signal of the working pipeline and control the inlet flow of the working pipeline; the outlet flow unit is used to output the outlet flow signal of the working pipeline; The controller outputs a signal indicating that the flow of the working pipeline is controlled according to the inlet flow signal, and outputs a signal indicating that the inlet and outlet of the working pipeline are closed according to the inlet flow signal and the outlet flow signal; in, The circulation pipeline system further includes: a liquid leakage detection unit and a liquid leakage sensor, wherein the liquid leakage sensor and the liquid leakage detection unit are electrically connected to the controller respectively; The liquid leakage detection unit comprises: a plurality of liquid leakage positioning devices; The leakage positioning device comprises a soluble substance, a wire insulated from each other and a resistance wire, wherein the soluble substance is arranged between the wire and the resistance wire, and when the soluble substance is dissolved, the wire is electrically connected to the resistance wire at the position where the soluble substance is dissolved; The plurality of leakage locating devices are sequentially laid along the outer surface of the working pipeline, and are electrically connected to form a topological structure identical to that of the working pipeline; The controller determines the leakage point of the working pipeline according to the topological structure and the resistance value of the leakage detection unit; The liquid leakage sensor is used to collect a liquid leakage signal, and the controller outputs a signal instructing to close the working pipeline according to the liquid leakage signal; in, The inlet flow unit includes: a flow regulating valve and a water inlet flow meter, and the inlet and outlet control unit includes: a first valve, a water inlet solenoid valve, a second valve and a third valve; The outlet of the first valve is communicated with the inlet of the flow regulating valve, the outlet of the flow regulating valve is communicated with the inlet of the water inlet flow meter, the outlet of the water inlet flow meter is communicated with the inlet of the water inlet solenoid valve, the outlet of the water inlet solenoid valve is communicated with the inlet of the second valve, the outlet of the second valve is communicated with the inlet of the working pipeline; the inlet of the third valve is communicated with the inlet of the first valve, and the outlet of the third valve is communicated with the outlet of the second valve; in, The import and export control unit also includes: a Y-type filter and an air eliminator; The Y-type filter and the degasser are connected in series between the first valve and the water inlet solenoid valve, the inlet of the Y-type filter is connected to the outlet of the first valve, the outlet of the Y-type filter is connected to the inlet of the flow regulating valve, the inlet of the degasser is connected to the outlet of the flow regulating valve, and the outlet of the degasser is connected to the inlet of the water inlet flow meter; When the liquid leakage sensor is not triggered, if the resistance value is lower than a threshold value, the position of the leakage point is determined according to the resistance value, wherein determining the position of the leakage point according to the resistance value includes: Respectively obtaining the resistance values ​​at both ends of the leakage detection unit; The location of the leakage point is determined according to the topological structure, the resistivity of the resistance wire and the resistance values ​​at both ends of the leakage detection unit.

2. The circulation pipeline system according to claim 1, characterized in that: The outlet flow unit includes: a return water flow meter; The inlet and outlet control unit further includes: a fourth valve, a return water solenoid valve, a fifth valve and a sixth valve; The inlet of the fifth valve is communicated with the outlet of the working pipeline, the outlet of the fifth valve is communicated with the inlet of the water return solenoid valve, the outlet of the water return solenoid valve is communicated with the inlet of the water return flowmeter, the outlet of the water return flowmeter is communicated with the inlet of the fourth valve, the inlet of the sixth valve is communicated with the inlet of the fifth valve, and the outlet of the sixth valve is communicated with the outlet of the fourth valve; The controller is electrically connected to the water inlet solenoid valve and the water return solenoid valve respectively; The controller outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the inlet flow signal and the outlet flow signal, and / or outputs a signal indicating that the water inlet solenoid valve is closed and that the water inlet solenoid valve is closed according to the topological structure and the resistance value of the leakage detection unit.

3. The circulation pipeline system according to claim 2, characterized in that: The inlet and outlet control unit further includes: a check valve; The check valve is connected in series between the fourth valve and the return flow meter, the inlet of the check valve is communicated with the outlet of the return flow meter, and the outlet of the check valve is communicated with the inlet of the fourth valve.

4. A circulation pipeline control method, characterized in that: Applicable to the circulation pipeline system according to any one of claims 1 to 3, comprising: Acquire flow data and resistance value, wherein the flow data represents the inlet and return water flow of the working pipeline, and the resistance value represents the resistance value of the leakage detection unit; When the flow data exceeds a first condition, closing the inlet and outlet of the working pipeline, wherein the first condition represents the difference between the inlet and return water flow rates of the working pipeline; When the flow rate data is lower than the first condition, if the liquid leakage sensor is triggered, an alarm signal is output; When the liquid leakage sensor is not triggered, if the resistance value is lower than a threshold value, determining the location of the leakage point according to the resistance value; When the resistance value is not lower than the threshold value, a signal for adjusting the flow regulating valve is output according to a preset flow rate.

5. The circulation pipeline control method according to claim 4, characterized in that: Determining the location of the leakage point according to the resistance value includes: Respectively obtaining the resistance values ​​at both ends of the leakage detection unit; The location of the leakage point is determined according to the topological structure, the resistivity of the resistance wire and the resistance values ​​at both ends of the leakage detection unit.

6. A terminal comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 4 to 5 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method as claimed in any one of claims 4 to 5 are implemented.

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