CN219870196U

CN219870196U - Leak detection system

Info

Publication number: CN219870196U
Application number: CN202320423185.1U
Authority: CN
Inventors: 李一鸣; 吴德志; 杨亚彬; 王健; 张可佳; 许文静; 黄明; 胡毅; 满建柱; 张友义
Original assignee: State Grid Corp of China SGCC; State Grid Beijing Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Beijing Electric Power Co Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-10-20
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses a leakage detection system. Wherein, this system includes: the electromagnetic valve is arranged in the pipe network, is connected with the signal converter through a valve cable and is used for controlling the on-off of the pipe network; the flowmeter is arranged in the pipe network, is connected with the signal converter through a flowmeter cable and is used for monitoring the flow in the pipe network to obtain a real-time flow signal and transmitting the real-time flow signal to the signal converter; and the signal converter is used for receiving the real-time flow signal, converting the real-time flow signal into a valve control signal and controlling the opening and closing of the electromagnetic valve. The utility model solves the technical problem of non-ideal detection rate of leakage conditions in a pipe network in the related technology.

Description

Leak detection system

Technical Field

The utility model relates to the technical field of leakage detection, in particular to a leakage detection system.

Background

In important type areas such as substations, the occurrence of leakage will have serious consequences: serious threat is caused to facility equipment, and the running of the equipment is directly affected if the facility is rusted and rotted lightly. One of the operation and maintenance monitoring means for pipe network leakage in the related art is to rely on manual inspection, so that leakage of a buried pipe network is difficult to find, and serious consequences may be caused when the leakage is found. In another related technology, the method depending on the overflow alarm device has the advantages that the fault rate of the probe is high, false alarm is easy to occur, the overflow alarm probe is installed in a cable interlayer, a cable pit or a drainage ditch, when the pipeline is leaked at a small flow rate, the probe is difficult to alarm, and the problem of insufficient detection capability of the pipeline leakage is also caused.

In view of the above problems, no effective solution has been proposed at present.

Disclosure of Invention

The embodiment of the utility model provides a leakage detection system, which at least solves the technical problem that the detection rate of leakage conditions in a pipe network is not ideal in the related technology.

According to one aspect of an embodiment of the present utility model, there is provided a leak detection system comprising: the electromagnetic valve is arranged in the pipe network, is connected with the signal converter and is used for controlling the on-off of the pipe network; the flowmeter is arranged in the pipe network, connected with the signal converter and used for monitoring the flow in the pipe network to obtain a real-time flow signal and transmitting the real-time flow signal to the signal converter; the signal converter receives the real-time flow signal, converts the real-time flow signal into a valve control signal and is used for controlling the opening and closing of the electromagnetic valve.

In the embodiment of the utility model, the purposes of detecting and automatically controlling the closing of the leakage points in real time and further improving the detection capability of the leakage condition of the pipe network are achieved, so that the technical effect of improving the detection rate of the leakage condition in the pipe network is achieved, and the technical problem of non-ideal detection rate of the leakage condition in the pipe network in the related technology is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic illustration of an alternative leak detection system according to an embodiment of the utility model;

FIG. 2 is a functional block diagram of an alternative leak detection system according to an embodiment of the utility model;

FIG. 3 is a schematic illustration of an electromagnetic flowmeter of an alternative leak detection system according to an embodiment of the utility model;

FIG. 4 is a valve control schematic of an alternative leak detection system according to an embodiment of the utility model;

FIG. 5 is a schematic diagram of a switching loop of an alternative leak detection system according to an embodiment of the utility model;

FIG. 6 is a control box schematic of an alternative leak detection system according to an embodiment of the utility model;

FIG. 7 is a system schematic diagram of an alternative leak detection system according to an embodiment of the utility model;

FIG. 8 is a schematic diagram of an alternate leak detection system interactive interface in accordance with an embodiment of the utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1

According to an embodiment of the present utility model, there is provided a system embodiment of a leak detection system, fig. 1 is a leak detection system according to an embodiment of the present utility model, as shown in fig. 1, comprising: electromagnetic valve 101, pipe network 102, flowmeter 103, signal converter 104, wherein,

the electromagnetic valve 101 is installed in the pipe network 102, is connected with the signal converter 104 through a valve cable, and is used for controlling the on-off of the pipe network 102;

the flowmeter 103 is installed in the pipe network 102, connected with the signal converter 104 through a cable of the flowmeter 103, and used for monitoring the flow in the pipe network 102 to obtain a real-time flow signal and sending the real-time flow signal to the signal converter 104;

the signal converter 104 receives the real-time flow signal, and converts the real-time flow signal into a valve control signal for controlling the opening and closing of the electromagnetic valve 101.

In the embodiment of the utility model, the electromagnetic valve 101 and the flowmeter 103 are arranged in the pipe network 102, so that the real-time sensing capability and the intervention capability for the leakage condition in the pipe network 102 are realized. The electromagnetic valve 101 is connected with the signal converter 104 through a valve cable in a wired manner and used for controlling the on-off of the pipe network 102, the flowmeter 103 is used for detecting the flow in the pipe network 102 and acquiring a real-time flow signal, and the electromagnetic valve is connected with the signal converter 104 through the flowmeter cable in a wired manner and used for transmitting the real-time flow signal to the signal converter 104. The signal converter 104 receives the real-time flow signal and converts the real-time flow signal into a valve control signal, and can be used to control the opening and closing of the electromagnetic valve 101, and it should be noted that the signal converter 104 is only used to convert the input real-time flow signal and output the corresponding valve control signal, and the signal processing manner is not an important point in the embodiment of the present utility model.

Alternatively, the signal converter 104 may be various, for example: the signal converter 104 is a single-chip microcomputer. The singlechip adopts a CMOS processor, has a 64KB chip programmable Flash memory and 1280 bytes of RAM, has 3 timers in the chip, has a full duplex serial interface, has a hardware watchdog circuit in the chip, and has a SPI (Serial Peripheral Interface) interface.

Alternatively, the electromagnetic valve 101 may be various, for example: the electromagnetic valve 101 for water is a pilot electromagnetic valve with a secondary valve opening, the structure of the electromagnetic valve mainly comprises a pilot valve and a main valve, and the main valve adopts a rubber sealing structure. When the valve is in normal position, the movable iron core seals the valve guide port, the pressure in the valve cavity is balanced, and the main valve port is closed. When the coil in the electromagnetic valve 101 is electrified, electromagnetic force is generated to suck the movable iron core, and medium in the main valve cavity leaks from the guide valve port, so that pressure difference is generated, the diaphragm or the valve cup is quickly lifted, the main valve port is opened, and the valve is in a passage. When the coil is powered off, the magnetic field disappears, the movable iron core is reset, the valve guide port is closed, and after the pressure in the pilot valve and the main valve cavity is balanced, the valve is in a closed state.

Alternatively, the above-mentioned flowmeter cable may be various, for example: the flow meter cable includes a power supply anode, a power supply cathode, and a signal output, and may use a switching power supply to provide a working power supply for the flow meter 103.

According to an embodiment of the present utility model, the electromagnetic valve 101 includes a manual switching handle for performing manual control on the electromagnetic valve 101.

In an embodiment of the present utility model, the solenoid valve 101 includes a manual switching handle for performing manual control. By providing a manual switching handle, in case of failure of the solenoid valve 101, the switching operation of the leakage pipe network 102 by manually operating the manual switching handle can be accomplished. Providing a back-up path for leakage intervention capability of the pipeline network 102 and improving the processing capability of leakage points.

According to an embodiment of the present utility model, the system further comprises: and a control knob, connected to the electromagnetic valve 101, for switching a control mode of the electromagnetic valve 101, where the control mode includes: an automatic control mode based on the valve control signal, and a manual control mode.

In the embodiment of the utility model, a control knob is connected with the electromagnetic valve 101 for realizing the switching of the control mode of the electromagnetic valve 101, wherein the control mode comprises an automatic control mode based on a valve control signal and a manual control mode. Through the processing, under the condition of switching into an automatic control mode, the situation that the corresponding pipeline is closed by mistake due to manual mistaken touch of a manual switching handle or interference between devices is avoided. In the case of switching to the manual control mode, erroneous switching or closing operations of the pipeline due to the presence of an interference signal or misalignment of the valve control signal are avoided.

According to an embodiment of the present utility model, the system further comprises: a mode indicator light connected to the signal converter 104 for indicating the control mode; and an opening/closing indicator lamp connected to the signal converter 104 for indicating the opening/closing of the electromagnetic valve 101.

In the embodiment of the present utility model, the current control mode is indicated by setting a mode indicator lamp connected to the signal converter 104. The opening/closing indicator lamp connected to the signal converter 104 indicates the opening/closing of the electromagnetic valve 101, so that the state of the pipe network 102 can be intuitively perceived.

Optionally, the pipe network 102 may include a plurality of branches, the mode indicator may be configured to indicate control modes corresponding to the plurality of branches, and the opening/closing indicator may be configured to indicate opening/closing states corresponding to the plurality of branches, respectively.

According to an embodiment of the present utility model, the electromagnetic valve 101 includes an auxiliary contact for feeding back the open/close state of the electromagnetic valve 101 to the signal converter 104.

In the embodiment of the present utility model, the electromagnetic valve 101 includes an auxiliary contact, and since the electromagnetic valve 101 is disposed in the pipe network 102, it cannot be directly seen whether the electromagnetic valve 101 gives a valve control signal to perform a corresponding operation, and the auxiliary contact is disposed to feed back the action state of the electromagnetic valve 101, so as to feed back the opening and closing state of the electromagnetic valve 101 to the signal converter 104.

According to an embodiment of the present utility model, the pipe network 102 includes a plurality of branches, and the plurality of branches are respectively provided with the electromagnetic valve 101 and the flowmeter 103.

In the embodiment of the present utility model, the pipe network 102 includes a plurality of branches, and in order to monitor the leakage conditions of the branches, each branch is provided with the electromagnetic valve 101 and the corresponding flowmeter 103, so as to control and monitor each branch.

According to an embodiment of the present utility model, the system further comprises: and the man-machine interaction interface is connected with the signal converter 104 and is used for displaying real-time flow signals corresponding to the branches and the opening and closing states of the electromagnetic valve 101 corresponding to the branches.

In the embodiment of the present utility model, a man-machine interaction interface is further provided and connected to the signal converter 104, so as to display real-time flow signals corresponding to the multiple branches, and the open/close states of the electromagnetic valves 101 corresponding to the multiple branches.

Alternatively, the man-machine interface described above employs a Modbus (a widely used serial communication protocol) based communication protocol with the signal converter 104.

Optionally, the man-machine interaction interface may be implemented in a plurality of ways, for example: the touch screen can be configured, a man-machine interaction interface is realized on an industrial control computer, when the man-machine interaction interface is operated through the touch screen, the touch screen can send Modbus messages to the signal converter 104, and the signal converter 104 receives the messages, performs corresponding actions and returns data. The system is used for displaying graphical water level monitoring data and valve running state data to operation and maintenance personnel and providing a graphical operation interface for remote control of the valve to the operation and maintenance personnel.

According to an embodiment of the present utility model, the man-machine interface and the signal converter 104 communicate via twisted pair wires in a differential transmission manner.

In the embodiment of the utility model, because the pipe network 102 is distributed in the building, wireless signal transmission is blocked, the wireless signal is transmitted in a wired mode, the transmitted signal is easy to be interfered under the condition of long-distance wired transmission, and the twisted pair is adopted for communication in a differential transmission mode, thereby being beneficial to improving the anti-interference capability and ensuring the normal transmission of the communication signal.

Optionally, the man-machine interaction interface is in a wired mode. The remote communication is connected with the signal converter 104, and the remote communication function is to remotely transmit real-time monitoring data and control instructions according to a certain communication protocol through a certain communication medium. Because the public mobile communication network of the partial underground or semi-underground transformer substation has weak or no signal, and the station room wall can block wireless signals, the WIFI hot spot cannot be reliably applied, and remote communication is transmitted by using an RS-485 bus. The differential transmission mode is adopted, so that the anti-interference capability on common mode signals is very strong, the anti-interference capability is enhanced by adopting twisted pair, the transmission distance can reach 10 km at maximum, and the transmission speed can reach 10 mega per second at maximum.

According to an embodiment of the present utility model, the flowmeter 103 comprises at least one of: laser speed measuring flowmeter, electromagnetic flowmeter, target flowmeter.

In an embodiment of the present utility model, the flow meter 103 may select an appropriate flow meter 103 according to the corresponding installation pipeline conditions based on various measurement principles, where the flow meter 103 includes at least one of: laser speed measuring flowmeter, electromagnetic flowmeter, target flowmeter.

Alternatively, an electromagnetic flowmeter measures the flow rate of a liquid based on the electromotive force generated when a conductor passes through an externally applied magnetic field using the principle of electromagnetic induction.

According to the embodiment of the utility model, the pipe network 102 at least comprises a fire water pipe, a heating water pipe and a water supply pipe.

In the embodiment of the present utility model, the pipe network 102 includes a plurality of water pipes with different purposes, including at least a fire water pipe, a heating water pipe, and a water supply pipe. The fire-fighting water pipe, the heating water pipe and the water supply pipe are commonly called as 'three water', so that the condition of the total 'three water' pipeline of the pipe network 102 is monitored, the directional operation and maintenance of the pipeline are facilitated, and the secondary hazard caused by undiscovered leakage is avoided.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the purpose of detecting leakage points in real time and automatically controlling the leakage points to be closed is achieved, and the detection capability of the leakage condition of the pipe network 102 is improved, so that the technical effect of improving the detection rate of the leakage condition in the pipe network 102 is achieved, and the technical problem that the detection rate of the leakage condition in the pipe network is not ideal in the related art is solved.

It should be noted that the specific configuration of the leak detection system of fig. 1 of the present utility model is merely illustrative, and the leak detection system of the present utility model may have more or less configurations than the leak detection system of fig. 1 in specific applications.

According to the present utility model, a preferred embodiment is provided.

FIG. 2 is a functional block diagram of an alternative permeation detection system according to an embodiment of the present utility model. As shown in fig. 2, an electromagnetic flowmeter 201, a single-chip microcomputer 202, an electromagnetic valve 101, and a touch screen 203, wherein:

the electromagnetic flowmeter 201 is connected with the singlechip 202 through a flowmeter cable, and measures the flow velocity of the liquid according to the electromotive force generated when the conductor passes through the externally applied magnetic field by utilizing the electromagnetic induction principle.

Fig. 3 is a schematic diagram of an electromagnetic flowmeter of an alternative leak detection system according to an embodiment of the present utility model, as shown in fig. 3, an electromagnetic flowmeter 201 generates magnetic lines of force through exciting windings a and B to be represented by dotted circles, and because water is a conductive fluid and flows in a pipeline, a real-time flow signal is obtained through an induction coil C, the real-time flow signal output by the electromagnetic flowmeter 201 is a direct-current voltage signal and is input into a digital-analog sampling unit of a single-chip microcomputer 202, the real-time flow signal of an analog quantity is converted into a digital quantity, and then converted into a water level signal inside the single-chip microcomputer 202, and then the water level signal is converted into a valve control signal.

The electromagnetic valve 101 is connected with an input/output port (I/0 port) on the singlechip 202 through a valve cable and is a pilot electromagnetic valve for secondary valve opening. The structure mainly comprises a pilot valve and a main valve, wherein the main valve adopts a rubber sealing structure. When the valve is in normal position, the movable iron core seals the valve guide port, the pressure in the valve cavity is balanced, and the main valve port is closed. When the coil is electrified, electromagnetic force is generated to attract the movable iron core, and medium in the main valve cavity leaks from the guide valve port, so that pressure difference is generated, the diaphragm or the valve cup is quickly supported, the main valve port is opened, and the valve is in a passage. When the coil is powered off, the magnetic field disappears, the movable iron core is reset, the valve guide port is closed, and after the pressure in the pilot valve and the main valve cavity is balanced, the valve is in a closed state.

The singlechip 202 converts the real-time flow signal into a valve control signal, and the valve control signal is an analog signal for starting the electromagnetic valve 101. Fig. 4 is a schematic diagram of valve control of an alternative leak detection system according to an embodiment of the present utility model, as shown in fig. 4, out0 to Out4 represent four output terminals of the single chip microcomputer 202, through which the output terminal, such as Out0, is connected to the base of the triode Q1, and R1 and R2 are bias resistors, so that the triode Q1 is turned on. "+12" indicates a power supply of 12V (volts), and in the case of conduction of the transistor, the power supply of 12V energizes the coil, and "D1" indicates an inverter diode connected in parallel with the coil L1 for preventing the reverse electromotive force of the inductor device coil. After the coil L1 is energized, the relay Km1 in the solenoid valve 101 is completed to be closed, "+24" is denoted as a power supply source of 24V for causing the valve body Z1 in the solenoid valve 101 to be attracted. The model of the singlechip 202 can be an 89C51 singlechip.

The touch screen 203 is connected with the singlechip 202 through a twisted pair, adopts a differential transmission mode such as Rs-485 communication for anti-interference and is used for displaying the state in the penetration detection system. The touch screen 203 may be of the TK6070iQ type.

Fig. 5 is a schematic diagram of a switching circuit of an alternative leak detection system according to an embodiment of the present utility model, where "1CK" is a manual switching handle, and (1) and (2) are two contacts of the manual switching handle, "S1" is a relay, and "1CK" and "S1" form a parallel circuit, so that the electromagnetic valve 101 is powered on, where "S1" is controlled by a valve control signal sent by the singlechip 202 to be opened and closed, and "1CK" is switched by the manual switching handle.

FIG. 6 is a schematic diagram of a control box of an alternative leak detection system according to an embodiment of the present utility model, where the control knobs are respectively provided for a plurality of branches in the pipe network as shown in FIG. 6, so as to control the state of the pipe network and switch the control modes in a centralized manner. Each branch comprises 4 indicator lamps for indicating a manual or automatic mode and a starting state or a stopping state of the corresponding branch, and different states are displayed in different colors.

Fig. 7 is a schematic diagram of an alternative leak detection system according to an embodiment of the present utility model, where, as shown in fig. 7, the application scenario is a substation, and the pipe network includes three types of pipes including a fire water pipe, a heating water pipe, and a water supply pipe, each type of pipe includes a plurality of sub-branches, and in fig. 7, each pipe illustrates three sub-branches, and each pipe is distinguished by a different line type, where the number is merely illustrative, and may be made up of more or fewer sub-branches. To achieve a comprehensive perception of the pipe network, a flow meter 103 and a solenoid valve 101 are installed for each pipe, and separate flow meters 103 are respectively arranged for the incoming total inlet 802 and the total outlet 804. Through the signal transmitted to the man-machine interaction interface, the operation and maintenance personnel can intuitively perceive the state in the pipe network.

FIG. 8 is a schematic diagram of an alternative leak detection system interface showing total water supply status and implementation flow in a station, and total valve status and flow for each type of conduit in a fire water, heating water, and water supply, and valve status and flow for a sub-branch in each type of conduit, according to an embodiment of the utility model.

According to the preferred embodiment provided by the utility model, the enhancement of the perceptibility of the leakage of the buried and concealed pipeline can be realized, the problem that the leakage is long from the leakage to the discovery caused by the passive inspection in the related technology is solved, the method provided by the embodiment of the utility model can be used for conveniently discovering and processing in time, other secondary injuries such as electrical faults and the like caused by the leakage are prevented, and the sufficient reaction time is reserved for operation and maintenance personnel. The leakage in the related art is avoided, the leakage point is cut off by means of manually closing the valve, the degree of automation is low, the leakage point can be cut off rapidly by remotely controlling the opening and closing of the electromagnetic valve, and the pipeline has good intervention capability.

In addition, it should be still noted that, the optional or preferred implementation manner of this embodiment may be referred to the related description in embodiment 1, and will not be repeated here.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, and such changes and modifications are intended to be included within the scope of the utility model.

Claims

1. A leak detection system, comprising: electromagnetic valve, pipe network, flowmeter, signal converter, wherein,

the electromagnetic valve is arranged in the pipe network, is connected with the signal converter through a valve cable and is used for controlling the on-off of the pipe network;

the flowmeter is arranged in the pipe network, connected with the signal converter through a flowmeter cable and used for monitoring the flow in the pipe network to obtain a real-time flow signal, and transmitting the real-time flow signal to the signal converter;

the signal converter receives the real-time flow signal, converts the real-time flow signal into a valve control signal and is used for controlling the opening and closing of the electromagnetic valve.

2. The leak detection system of claim 1, wherein the solenoid valve includes a manual switch handle for manual control of the solenoid valve.

3. The leak detection system of claim 1, wherein the system further comprises:

the control knob is connected with the electromagnetic valve and used for switching a control mode of the electromagnetic valve, wherein the control mode comprises the following steps: an automatic control mode based on the valve control signal, and a manual control mode.

4. A leak detection system as defined in claim 3, further comprising:

the mode indicator lamp is connected with the signal converter and used for indicating the control mode;

and the opening and closing indicator lamp is connected with the signal converter and used for indicating the opening and closing of the electromagnetic valve.

5. The leak detection system of claim 1, wherein the solenoid valve includes an auxiliary contact for feeding back an open and closed state of the solenoid valve to the signal converter.

6. The leak detection system of claim 1, wherein the network of pipes includes a plurality of branches, the plurality of branches each mounting the solenoid valve and the flow meter.

7. The leak detection system of claim 6, wherein the system further comprises:

and the man-machine interaction interface is connected with the signal converter and used for displaying real-time flow signals corresponding to the branches respectively and the opening and closing states of the electromagnetic valves corresponding to the branches respectively.

8. The leak detection system of claim 7, wherein the man-machine interface communicates with the signal converter via twisted pair wires using differential transmission.

9. The leak detection system of claim 1, wherein the flow meter comprises at least one of: laser speed measuring flowmeter, electromagnetic flowmeter, target flowmeter.

10. The leak detection system of any one of claims 1 to 9, wherein the network comprises at least a fire water pipe, a heating water pipe, and a water supply pipe.