Electronic pressure-measuring cut-off device for gas pipe network

Abstract

The utility model discloses an electronic pressure-measuring cut-off device for a gas pipe network. The electronic pressure-measuring cut-off device comprises a communication power supply circuit, a system power supply circuit and a valve driving power supply circuit which are respectively connected with a battery, the communication power supply circuit is connected with an NBIoT communication circuit, and the NBIoT communication circuit is connected with a signal level conversion circuit and an SIM card circuit. The system power supply circuit is connected with a microcontroller circuit, and the valve driving power supply circuit is connected with a valve driving circuit; the microcontroller circuit is respectively connected with the NBIoT communication circuit, the signal level conversion circuit, the valve driving power supply circuit and the valve driving circuit; the microcontroller circuit is connected with a pressure monitoring circuit and a data storage circuit. The pressure monitoring circuit and the valve driving circuit are additionally arranged, pressure monitoring of the front end and the rear end of a pipe network valve is achieved, the NB-IoT communication circuit is additionally arranged, information interaction with an external management platform is achieved, and the problem that potential safety hazards exist due to the fact that an existing pressure measuring cut-off device cannot conduct detection and report in time is solved.

Description

Technical Field

[0001] The utility model belongs to the field of gas pipeline network pressure monitoring, and relates to an electronic pressure measuring and cutting device, in particular to an electronic pressure measuring and cutting device for a gas pipeline network. Background Art

[0002] At present, most of the gas pipeline pressure cut-off valves are mechanical cut-off valves. After the pressure abnormality is cut off, the abnormal information cannot be reported to the management system in time, and it is usually necessary to go to the gas pipeline for inspection and maintenance. However, the pressure abnormality may cause the gas pipeline to be damaged and gas leak due to uneven force, and the manual on-site handling method may have some safety hazards. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an electronic pressure measuring and cutting-off device for a gas pipeline network, so as to solve the technical problem that the pressure measuring and cutting-off device in the prior art cannot detect and report in time, resulting in safety hazards.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A gas pipeline network electronic pressure measuring and cutting device comprises a communication power supply circuit, a system power supply circuit and a valve driving power supply circuit respectively connected to a battery; the communication power supply circuit is connected to an NB_IoT communication circuit, and the NB_IoT communication circuit is respectively connected to a signal level conversion circuit and a SIM card circuit; the system power supply circuit is connected to a microcontroller circuit, and the valve driving power supply circuit is connected to a valve driving circuit; the microcontroller circuit is respectively connected to the NB_IoT communication circuit, the signal level conversion circuit, the valve driving power supply circuit and the valve driving circuit; the microcontroller circuit is respectively connected to a pressure monitoring circuit and a data storage circuit.

[0006] The utility model also includes the following technical features:

[0007] The system power supply circuit includes a voltage stabilizing module U1, a capacitor E1 and a capacitor C3, wherein pin 1 of the voltage stabilizing module U1 is connected to the negative electrode of the capacitor E1 and one end of the capacitor C3 and is grounded, pin 2 of the voltage stabilizing module U1 is connected to a battery, and pin 3 of the voltage stabilizing module U1 is connected to the positive electrode of the capacitor E1, the second end of the capacitor C3 and the microcontroller circuit.

[0008] The communication power supply circuit includes a battery holder J2, a boost chip U3, a diode D1, a diode D4, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor E2, a resistor R3, a resistor R5, a resistor R6 and an inductor L1, wherein the 2nd foot of the battery holder J2 is connected to one end of the capacitor C1, one end of the capacitor C2, the 2nd foot of the boost chip U3, one end of the resistor R3, one end of the capacitor C5 and one end of the capacitor E2, the 1st foot of the battery holder J2 is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the second end of the capacitor C1, the second end of the capacitor C2, the boost chip U3, the resistor R3, the capacitor C5 and the capacitor E2, Pin 6 of the boost chip U3, one end of the inductor L1 and the battery are connected together, and the second end of the inductor L1 is connected to pin 1 of the boost chip U3; pin 5 of the boost chip U3 is connected to one end of the resistor R6, the second end of the capacitor C5, the second end of the capacitor E2, the positive electrode of the diode D4 and the NB_IoT communication circuit; the negative electrode of the diode D4 is connected to the microcontroller circuit, pin 3 of the boost chip U3 is connected to the second end of the resistor R3 and one end of the resistor R5, and the second end of the resistor R5 is connected to the second end of the resistor R6; pin 4 of the boost chip U3 is connected to the microcontroller circuit.

[0009] The valve driving power supply circuit includes a valve chip U8 and a capacitor C19, wherein pin 4 of the valve chip U8 is connected to one end of the capacitor C19 and a battery, the second end of the capacitor C19 is grounded, and pin 2 of the valve chip U8 is grounded; pin 5 of the valve chip U8 is connected to the valve driving circuit, pin 1 of the valve chip U8 is left floating, and pin 3 of the valve chip U8 is connected to the microcontroller circuit.

[0010] The NB_IoT communication circuit includes a NB_IoT module U7, an antenna base ANT1, a capacitor C17, a capacitor C14, a capacitor C15, a capacitor C16 and a resistor R18, wherein one end of the resistor R18 is connected to pin 15 of the NB_IoT module U7, and the second end of the resistor R18 is connected to the microcontroller circuit; pins 42 and 43 of the NB_IoT module U7 are connected to one end of the capacitor C17, one end of the capacitor C14, one end of the capacitor C15, one end of the capacitor C16 and the communication power supply circuit; the second end of the capacitor C17 is connected to the second end of the capacitor C14, the second end of the capacitor C15 and the second end of the capacitor C16 and is grounded; pin 1 of the antenna base ANT1 is connected to pin 35 of the NB_IoT module U7, and pin 2 of the antenna base ANT1 is grounded; pins 1, 27 and 34 of the NB_IoT module U7 are all grounded.

[0011] The SIM card circuit includes a SIM card U9, a resistor R15, a resistor R16, a resistor R17, a capacitor C18, a capacitor C20, a capacitor C21 and a capacitor C22, wherein pin 3 of the SIM card U9 is commonly connected to one end of the resistor R17 and one end of the capacitor C18, the second end of the resistor R17 is connected to the NB_IoT communication circuit, pin 6 of the SIM card U9 is commonly connected to one end of the resistor R16 and one end of the capacitor C20, the second end of the resistor R16 is connected to the NB_IoT communication circuit, pin 7 of the SIM card U9 is commonly connected to one end of the resistor R15 and one end of the capacitor C21, the second end of the resistor R15 is connected to the NB_IoT communication circuit, the second end of the capacitor C18 is commonly connected to the second end of the capacitor C20 and the second end of the capacitor C21 and is grounded; pin 8 of the SIM card U9 is connected to one end of the capacitor C22 and the NB_IoT communication circuit, the second end of the capacitor C22 is connected to pin 1 of the SIM card U9 and is grounded, and pins 2, 4 and 5 of the SIM card U9 are suspended.

[0012] The signal level conversion circuit includes a resistor R19, a resistor R20, and a resistor R21, wherein one end of the resistor R19 is connected to the NB_IoT communication circuit, and the second end of the resistor R19 is connected to the microcontroller circuit; one end of the resistor R20 is connected to the microcontroller circuit, the second end of the resistor R20 is connected to one end of the resistor R21 and the NB_IoT communication circuit, and the second end of the resistor R21 is grounded.

[0013] The valve drive circuit includes a power socket J6, a valve chip U6, a capacitor C12, a capacitor C13, a resistor R11 and a resistor R14. Pin 1 of the power socket J6 is connected to pin 1 of the valve chip U6, and pin 2 of the power socket J6 is connected to pin 4 of the valve chip U6; one end of the capacitor C12 is connected to one end of the capacitor C13, one end of the resistor R11, one end of the resistor R14, pin 2 of the valve chip U6, pin 3 of the valve chip U6 and the valve drive power circuit; the second end of the capacitor C1 is connected to the second end of the capacitor C13 and is grounded; the second end of the resistor R11 is connected to pin 7 of the valve chip U6 and the microcontroller circuit; the second end of the resistor R14 is connected to pin 6 of the U6 valve chip and the microcontroller circuit; pins 6 and 7 of the valve chip U6 are both grounded.

[0014] The data storage circuit includes a storage chip U5, a resistor R12 and a resistor R13. Pins 1, 2, 3, 4 and 7 of the storage chip U5 are grounded together, and pin 8 of the storage chip U5 is connected to one end of the resistor R12, one end of the resistor R13 and a microcontroller circuit; the second end of the resistor R12 is connected to pin 6 of the storage chip U5 and the microcontroller circuit; the second end of the resistor R13 is connected to pin 5 of the storage chip U5 and the microcontroller circuit.

[0015] The pressure monitoring circuit includes an ADC conversion chip U2, a pressure sensor J1, a pressure sensor J3, a resistor R9, a resistor R1, a capacitor C4, a capacitor C9 and an inductor L2; wherein, pin 1 of the ADC conversion chip U2 is connected to the microcontroller circuit, pin 4 of the ADC conversion chip U2 is connected to pin 3 of the pressure sensor J1, pin 5 of the ADC conversion chip U2 is connected to pin 2 of the pressure sensor J1, pin 6 of the ADC conversion chip U2 is connected to pin 1 of the pressure sensor J1, pin 4 of the pressure sensor J1 is connected to pin 4 of the pressure sensor J3, pin 9 of the ADC conversion chip U2, one end of the capacitor C4 and one end of the resistor R1 are connected together, and the second end of the capacitor C4 is connected to the resistor One end of R9 is connected to pin 10 of the ADC conversion chip U2, the second end of the resistor R9 is grounded, the second end of the resistor R1 is grounded, pin 2 of the pressure sensor J3 is connected to pin 7 of the ADC conversion chip U2, pin 1 of the pressure sensor J3 is connected to pin 8 of the ADC conversion chip U2, and pin 3 of the pressure sensor J3 is connected to pin 11 of the ADC conversion chip U2; pin 13 of the ADC conversion chip U2 is connected to one end of the inductor L2 and one end of the capacitor C9, the second end of the inductor L2 is connected to the microcontroller circuit, and the second end of the capacitor C9 is grounded; pin 15 of the ADC conversion chip U2 is connected to the microcontroller circuit; pin 16 of the ADC conversion chip U2 is connected to the microcontroller circuit.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] In the utility model, by adding a pressure monitoring circuit and a valve driving circuit, it is possible to monitor the pressure at the front and back ends of the pressure pipe network valve, and the valve can be remotely closed or opened according to the pressure judgment; by adding an NB-IoT communication circuit, the device is remotely connected to an external management platform through the NB-IoT network, and the external management platform sends parameters such as the collection interval and the reporting interval to the device through the NB_IoT network. The device collects and reports data according to the parameters sent by the external management platform, which solves the technical problem in the prior art that the pressure measuring and cutting device cannot detect and report in time, resulting in safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic diagram of a microcontroller circuit;

[0020] Figure 3 is a schematic diagram of the system power supply circuit;

[0021] Figure 4 is a schematic diagram of a communication power supply circuit;

[0022] Figure 5This is a schematic diagram of the valve drive power supply circuit;

[0023] Figure 6 This is a schematic diagram of the NB-IoT communication circuit;

[0024] Figure 7 is a schematic diagram of a SIM card circuit;

[0025] Figure 8 is a schematic diagram of a signal level conversion circuit;

[0026] Fig. 9 is a schematic diagram of a valve drive circuit;

[0027] Fig.10 A schematic diagram of a data storage circuit;

[0028] Fig.11 Schematic diagram of the pressure monitoring circuit.

[0029] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0030] It should be noted that, unless otherwise specified, all components in the present invention are components known in the art.

[0031] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0032] The utility model provides an electronic pressure measuring and cutting device for a gas pipeline network, comprising a communication power supply circuit, a system power supply circuit and a valve driving power supply circuit respectively connected to a battery; the communication power supply circuit is connected to an NB_IoT communication circuit, and the NB_IoT communication circuit is respectively connected to a signal level conversion circuit and a SIM card circuit; the system power supply circuit is connected to a microcontroller circuit, and the valve driving power supply circuit is connected to a valve driving circuit; the microcontroller circuit is respectively connected to the NB_IoT communication circuit, the signal level conversion circuit, the valve driving power supply circuit and the valve driving circuit; the microcontroller circuit is respectively connected to a pressure monitoring circuit and a data storage circuit.

[0033] In the above technical solution, by adding a pressure monitoring circuit and a valve driving circuit, pressure monitoring at the front and back ends of the pressure pipe network valve can be realized, and the valve can be remotely closed or opened according to the pressure judgment; by adding an NB-IoT communication circuit, the device is remotely connected to the external management platform through the NB-IoT network, and the external management platform sends parameters such as the collection interval and the reporting interval to the device through the NB_IoT network. The device collects and reports data according to the parameters sent by the external management platform, which solves the technical problem in the prior art that the pressure measuring and cutting device cannot detect and report in time, resulting in safety hazards.

[0034] Among them, the microcontroller circuit adopts a microcontroller U4 and its peripheral circuits, and the peripheral circuits include a crystal oscillator X1, a capacitor C7, a capacitor C8 and a capacitor C10, wherein pin 37 of the microcontroller U4 is connected to one end of the crystal oscillator X1 and one end of the capacitor C7, the second end of the crystal oscillator X1 is connected to pin 36 of the microcontroller U4 and one end of the capacitor C8, the second end of the capacitor C8 is connected to the second end of the capacitor C7 and is grounded; pin 38 of the microcontroller U4 is connected to one end of the capacitor C10, and the second end of the capacitor C10 is grounded.

[0035] Among them, the microcontroller U4 is used to process, store and upload the pressure data, and can also automatically control the valve according to the pressure state; the crystal oscillator X1, capacitor C7 and capacitor C8 provide a 32.768KHz clock for the microcontroller. Capacitor C10 filters the voltage input to the controller.

[0036] Preferably, the models of the microcontroller U4 and the crystal oscillator X1 are FM33LC025N and SSP-T7-F;

[0037] The values ​​of capacitor C7, capacitor C8, and capacitor C10 are 22 pF, 22 pF, and 100 nF, respectively.

[0038] The system power supply circuit includes a voltage stabilizing module U1, a capacitor E1 and a capacitor C3, wherein pin 1 of the voltage stabilizing module U1 is connected to the negative electrode of the capacitor E1 and one end of the capacitor C3 and is grounded, pin 2 of the voltage stabilizing module U1 is connected to a battery, and pin 3 of the voltage stabilizing module U1 is connected to the positive electrode of the capacitor E1, the second end of the capacitor C3 and the microcontroller circuit.

[0039] In the above circuit, the voltage stabilizing chip U1 is an LDO type voltage stabilizing circuit, which outputs a 3.3V voltage through the voltage stabilizing module U1, capacitor E1 and capacitor C3 to stabilize the input 3.5-9V battery voltage and supply power to the microcontroller circuit. Among them, the 3rd pin of the voltage stabilizing module U1 is connected to the positive electrode of the capacitor E1, the second end of the capacitor C3 and the 40th pin of the microcontroller U4 of the microcontroller circuit.

[0040] Preferably, the model of the voltage stabilizing module U1 is 6250-33C, and the values ​​of the capacitor E1 and the capacitor C3 are 100uF and 100nF respectively.

[0041] The communication power supply circuit includes a battery holder J2, a boost chip U3, a diode D1, a diode D4, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor E2, a resistor R3, a resistor R5, a resistor R6 and an inductor L1, wherein the 2nd foot of the battery holder J2 is connected to one end of the capacitor C1, one end of the capacitor C2, the 2nd foot of the boost chip U3, one end of the resistor R3, one end of the capacitor C5 and one end of the capacitor E2, the 1st foot of the battery holder J2 is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the second end of the capacitor C1, the second end of the capacitor C2, the boost chip U3, the positive electrode of the diode D1, the negative electrode of the diode D1, the negative electrode of the diode D4, the negative electrode of the diode D5 and the negative electrode of the diode D6. Pin 6 of chip U3, one end of inductor L1 and the battery are connected together, and the second end of inductor L1 is connected to pin 1 of boost chip U3; pin 5 of boost chip U3 is connected to one end of resistor R6, the second end of capacitor C5, the second end of capacitor E2, the positive electrode of diode D4 and the NB_IoT communication circuit; the negative electrode of diode D4 is connected to the microcontroller circuit, pin 3 of boost chip U3 is connected to the second end of resistor R3 and one end of resistor R5, and the second end of resistor R5 is connected to the second end of resistor R6; pin 4 of boost chip U3 is connected to the microcontroller circuit.

[0042] In the above circuit, the voltage regulator chip U3 is a boost circuit, which is used to stabilize the voltage of 2.8-3.6V to 3.6V to power the NB-IoT circuit. The resistor R6, capacitor C5, the positive electrode of capacitor E2, the positive electrode of diode D4 and the 5th pin of U3 jointly output 3.8V voltage to power the NB_IoT communication circuit; the cathode of diode D4 outputs 3.3V to power the microcontroller circuit.

[0043] The role of diode D1 is to prevent the boost chip from burning due to reverse connection of the power supply. Capacitor C1 filters the input voltage of the boost chip U3. Resistors R3, R5, and R6 divide the output voltage of the boost chip in series to provide a reference voltage for the boost chip U3, so that its output is guaranteed to be 3.6V. Capacitors C5 and E2 filter the output voltage of the boost chip to obtain a purer power supply, and diode D4 realizes the automatic switching function of the system power supply from the boost circuit or the system electrical element circuit.

[0044] Among them, pin 5 of the boost chip U3 is connected to one end of the resistor R6, the second end of the capacitor C5, the second end of the capacitor E2, the positive pole of the diode D4, and the 42nd and 43rd pins of the NB_IoT module U7 of the NB_IoT communication circuit; the negative pole of the diode D4 is connected to the 40th pin of the microcontroller U4 of the microcontroller circuit, and the 4th pin of the boost chip U3 is connected to the 16th pin of the microcontroller U4 of the microcontroller circuit.

[0045] Preferably, the models of the battery holder J2, the boost chip U3, the diode D1, and the diode D4 are 2564-2A, SY7072, SS14, and M7, respectively.

[0046] The values ​​of capacitor C1, capacitor C2, capacitor C5, capacitor E2, resistor R3, resistor R5, resistor R6, and inductor L1 are 1000uF resistor R3, 100nF, 100nF, 1000uF, 1M, 200K, 2M, and 4.7uH respectively.

[0047] The valve driving power supply circuit includes a valve chip U8 and a capacitor C19, wherein pin 4 of the valve chip U8 is connected to one end of the capacitor C19 and a battery, the second end of the capacitor C19 is grounded, and pin 2 of the valve chip U8 is grounded; pin 5 of the valve chip U8 is connected to the valve driving circuit, pin 1 of the valve chip U8 is left floating, and pin 3 of the valve chip U8 is connected to the microcontroller circuit.

[0048] In the above circuit, the voltage stabilizer U8 is an LDO type voltage stabilizer circuit, which is used to stabilize the input 9-3.5V power supply to 3.3V voltage to power the valve drive circuit; capacitor C19 filters the power input to the valve drive power supply circuit to obtain a purer power supply.

[0049] Among them, pin 5 of the valve chip U8 is connected to one end of capacitor C12 and one end of capacitor C13 of the valve driving circuit, one end of resistor R11, one end of resistor R14, pin 2 of the valve chip U6, and pin 3 of the valve chip U6, and pin 3 of the valve chip U8 is connected to pin 25 of the microcontroller U4 of the microcontroller circuit.

[0050] Preferably, the model of U8 is MD7218E33, and the value of capacitor C19 is 100nF.

[0051] The NB_IoT communication circuit includes an NB_IoT module U7, an antenna base ANT1, a capacitor C17, a capacitor C14, a capacitor C15, a capacitor C16 and a resistor R18, wherein one end of the resistor R18 is connected to pin 15 of the NB_IoT module U7, and the second end of the resistor R18 is connected to the microcontroller circuit; pins 42 and 43 of the NB_IoT module U7 are connected to one end of the capacitor C17, one end of the capacitor C14, one end of the capacitor C15, one end of the capacitor C16 and the communication power supply circuit; the second end of the capacitor C17 is connected to the second end of the capacitor C14, the second end of the capacitor C15 and the second end of the capacitor C16 and is grounded; pin 1 of the antenna base ANT1 is connected to pin 35 of the NB_IoT module U7, and pin 2 of the antenna base ANT1 is grounded; pins 1, 27 and 34 of the NB_IoT module U7 are all grounded.

[0052] In the above circuit, NB-IoT module U7 is used to send pressure data to the management platform through the NB-IoT network; capacitors C14, C15, C16, and C17 filter the power input to NB-IoT module U7. ANT1 is the external antenna of NB-IoT module U7 to obtain a good network signal.

[0053] Among them, the second end of the resistor R18 is connected to the 7th pin of the microcontroller U4 of the microcontroller circuit, and the 42nd and 43rd pins of the NB_IoT module U7 are connected to one end of the capacitor C17, one end of the capacitor C14, one end of the capacitor C15, one end of the capacitor C16, and the 5th pin of the boost chip U3 of the communication power supply circuit, one end of the resistor R6, the second end of the capacitor C5, the second end of the capacitor E2 and the positive electrode of the diode D4.

[0054] Preferably, the models of the NB_IoT module U7 and the antenna base ANT1 are BC28 and SMA-KE respectively;

[0055] The values ​​of capacitor C17, capacitor C14, capacitor C15, capacitor C16, and resistor R18 are 100uF, 100nF, 100pF, and 18pF, respectively.

[0056] The SIM card circuit includes a SIM card U9, a resistor R15, a resistor R16, a resistor R17, a capacitor C18, a capacitor C20, a capacitor C21 and a capacitor C22, wherein pin 3 of the SIM card U9 is connected to one end of the resistor R17 and one end of the capacitor C18, the second end of the resistor R17 is connected to the NB_IoT communication circuit, pin 6 of the SIM card U9 is connected to one end of the resistor R16 and one end of the capacitor C20, the second end of the resistor R16 is connected to the NB_IoT communication circuit, pin 7 of the SIM card U9 is connected to one end of the resistor R15 and one end of the capacitor C21, the second end of the resistor R15 is connected to the NB_IoT communication circuit, the second end of the capacitor C18 is connected to the second end of the capacitor C20 and the second end of the capacitor C21 and is grounded; pin 8 of the SIM card U9 is connected to one end of the capacitor C22 and the NB_IoT communication circuit, the second end of the capacitor C22 is connected to pin 1 of the SIM card U9 and is grounded, and pins 2, 4 and 5 of the SIM card U9 are suspended.

[0057] In the above circuit, the SIM card circuit is used to authenticate the customer's identity.

[0058] The second end of resistor R17 is connected to pin 11 of the NB_IoT module U7 of the NB_IoT communication circuit, the second end of resistor R16 is connected to pin 13 of the NB_IoT module U7 of the NB_IoT communication circuit, the second end of resistor R15 is connected to pin 12 of the NB_IoT module U7 of the NB_IoT communication circuit, and pin 8 of the SIM card U9 is connected to one end of capacitor C22 and pin 14 of the NB_IoT module U7 of the NB_IoT communication circuit.

[0059] Preferably, the model of SIM card U9 is a patch SIM card;

[0060] The values ​​of resistor R15, resistor R16, resistor R17, capacitor C18, capacitor C20, capacitor C21, and capacitor C22 are 22R, 22R, 22R, 33pF, 33pF, 33pF, and 100nF, respectively.

[0061] The signal level conversion circuit includes resistor R19, resistor R20, and resistor R21, wherein one end of resistor R19 is connected to the NB_IoT communication circuit, and the second end of resistor R19 is connected to the microcontroller circuit; one end of resistor R20 is connected to the microcontroller circuit, the second end of resistor R20 is connected to one end of resistor R21 and the NB_IoT communication circuit, and the second end of resistor R21 is grounded.

[0062] In the above circuit, the signal level conversion circuit is used to convert the serial port level voltage between the microcontroller circuit and the NB_IoT communication circuit into a suitable level voltage, wherein resistors R20 and R21 are used to convert the 3.3V level of the microcontroller to 1.8V, and resistor R19 is used to limit the current between the microcontroller and the NB-IoT module.

[0063] Among them, one end of the resistor R19 is connected to the 18th pin of the NB_IoT module U7 of the NB_IoT communication circuit, and the second end of the resistor R19 is connected to the 5th pin of the microcontroller U4 of the microcontroller circuit; one end of the resistor R20 is connected to the 6th pin of the microcontroller U4 of the microcontroller circuit, and the second end of the resistor R20 is connected to one end of the resistor R21 and the 17th pin of the NB_IoT module U7 of the NB_IoT communication circuit.

[0064] Preferably, the values ​​of the resistor R19, the resistor R20, and the resistor R21 are 1K, 1K, and 5.6K, respectively.

[0065] The valve drive circuit includes a power socket J6, a valve chip U6, a capacitor C12, a capacitor C13, a resistor R11 and a resistor R14. Pin 1 of the power socket J6 is connected to pin 1 of the valve chip U6, and pin 2 of the power socket J6 is connected to pin 4 of the valve chip U6; one end of the capacitor C12 is connected to one end of the capacitor C13, one end of the resistor R11, one end of the resistor R14, pin 2 of the valve chip U6, pin 3 of the valve chip U6 and the valve drive power circuit; the second end of the capacitor C1 is connected to the second end of the capacitor C13 and is grounded; the second end of the resistor R11 is connected to pin 7 of the valve chip U6 and the microcontroller circuit; the second end of the resistor R14 is connected to pin 6 of the U6 valve chip and the microcontroller circuit; and pins 6 and 7 of the valve chip U6 are both grounded.

[0066] In the above circuit, the valve drive circuit is used to close and open the valve according to the control signal of the microcontroller circuit, wherein the valve drive chip U6 is a MOS switch chip, which amplifies the voltage signals of pins 6 and 7 and outputs them from pins 1 and 4, thereby driving the valve motor to close and open the valve; resistors R11 and R14 are level pull-up resistors to prevent abnormal valve switching when there is no signal or floating input; capacitors C12 and C13 filter the power input of the valve drive chip U6 to obtain a purer power supply.

[0067] Among them, one end of capacitor C12 is connected to one end of capacitor C13, one end of resistor R11, one end of resistor R14, pin 2 of valve chip U6, pin 3 of valve chip U6 and pin 5 of valve chip U8 of valve drive power supply circuit, the second end of resistor R11 is connected to pin 7 of valve chip U6 and pin 27 of microcontroller U4 of microcontroller circuit, the second end of resistor R14 is connected to pin 6 of U6 valve chip and pin 28 of microcontroller U4 of microcontroller circuit,

[0068] Preferably, the models of the power socket J6 and the valve chip U6 are 2564-2A and L9110S respectively.

[0069] The values ​​of capacitor C12, capacitor C13, resistor R11, and resistor R14 are 10uF, 100nF, 10K, and 10K respectively.

[0070] The data storage circuit includes a storage chip U5, a resistor R12 and a resistor R13. Pins 1, 2, 3, 4 and 7 of the storage chip U5 are grounded together. Pin 8 of the storage chip U5 is connected to one end of the resistor R12, one end of the resistor R13 and a microcontroller circuit; the second end of the resistor R12 is connected to pin 6 of the storage chip U5 and the microcontroller circuit; the second end of the resistor R13 is connected to pin 5 of the storage chip U5 and the microcontroller circuit.

[0071] In the above circuit, the data storage circuit is used to record and store the collected pressure data, wherein the data storage chip U5 is used to store the collected pressure state data; the storage chip signal end of resistor R12 and resistor R13 provides a pull-up power supply to make it less prone to errors during the communication process.

[0072] Among them, pin 8 of the storage chip U5 is connected to one end of the resistor R12, one end of the resistor R13 and pin 18 of the microcontroller U4 of the microcontroller circuit; the second end of the resistor R12 is connected to pin 6 of the storage chip U5 and pin 19 of the microcontroller U4 of the microcontroller circuit; the second end of the resistor R13 is connected to pin 5 of the storage chip U5 and pin 19 of the microcontroller U4 of the microcontroller circuit.

[0073] Preferably, the model of U5 is AT24C512;

[0074] The values ​​of the resistor R12 and the resistor R13 are 10K and 10K respectively.

[0075] The pressure monitoring circuit includes an ADC conversion chip U2, a pressure sensor J1, a pressure sensor J3, a resistor R9, a resistor R1, a capacitor C4, a capacitor C9 and an inductor L2; wherein, pin 1 of the ADC conversion chip U2 is connected to the microcontroller circuit, pin 4 of the ADC conversion chip U2 is connected to pin 3 of the pressure sensor J1, pin 5 of the ADC conversion chip U2 is connected to pin 2 of the pressure sensor J1, pin 6 of the ADC conversion chip U2 is connected to pin 1 of the pressure sensor J1, pin 4 of the pressure sensor J1 is connected to pin 4 of the pressure sensor J3, pin 9 of the ADC conversion chip U2, one end of the capacitor C4 and one end of the resistor R1 are connected together, and the second end of the capacitor C4 is connected to the resistor R 9 is connected to pin 10 of the ADC conversion chip U2, the second end of the resistor R9 is grounded, the second end of the resistor R1 is grounded, pin 2 of the pressure sensor J3 is connected to pin 7 of the ADC conversion chip U2, pin 1 of the pressure sensor J3 is connected to pin 8 of the ADC conversion chip U2, and pin 3 of the pressure sensor J3 is connected to pin 11 of the ADC conversion chip U2; pin 13 of the ADC conversion chip U2 is connected to one end of the inductor L2 and one end of the capacitor C9, the second end of the inductor L2 is connected to the microcontroller circuit, and the second end of the capacitor C9 is grounded; pin 15 of the ADC conversion chip U2 is connected to the microcontroller circuit; pin 16 of the ADC conversion chip U2 is connected to the microcontroller circuit.

[0076] In the above circuit, the pressure monitoring circuit is used to monitor the pressure of the gas pipeline in real time. Among them, the ADC conversion chip U2 is used to convert the voltage signals of the pressure sensor J1 and the pressure sensor J3 into ADC digital signals. Resistor R1 provides a reference voltage for the ADC conversion chip, and capacitor C4 filters the feedback end of the ADC conversion chip to obtain a more accurate feedback voltage. Resistor R9 is a short-circuit resistor between the digital ground and the analog ground. Inductor L2 and capacitor C9 form a low-pass filter circuit to filter the input power supply of the ADC conversion chip to obtain a pure power supply.

[0077] Among them, pin 1 of the ADC conversion chip U2 is connected to pin 11 of the microcontroller U4 of the microcontroller circuit, pin 13 of the ADC conversion chip U2 is connected to one end of the inductor L2, one end of the capacitor C9 and together, the second end of the inductor L2 is connected to pin 40 of the microcontroller U4 of the microcontroller circuit, and the second end of the capacitor C9 is grounded; pin 15 of the ADC conversion chip U2 is connected to pin 13 of the microcontroller U4 of the microcontroller circuit; pin 16 of the ADC conversion chip U2 is connected to pin 12 of the microcontroller U4 of the microcontroller circuit.

[0078] Preferably, the models of the ADC conversion chip U2, the pressure sensor J1, and the pressure sensor J3 are AD7793, MPM281, and MPM281 respectively; the values ​​of the resistor R9, the resistor R1, the capacitor C4, the capacitor C9, and the inductor L2 are 0R, 2.4K, 100nF, 100nF, and 33nH respectively.

Claims

1. An electronic pressure measuring and cutting device for a gas pipeline network, characterized in that: It includes a communication power supply circuit, a system power supply circuit and a valve drive power supply circuit which are respectively connected to the battery; the communication power supply circuit is connected to the NB_IoT communication circuit, and the NB_IoT communication circuit is respectively connected to a signal level conversion circuit and a SIM card circuit; the system power supply circuit is connected to a microcontroller circuit, and the valve drive power supply circuit is connected to a valve drive circuit; the microcontroller circuit is respectively connected to the NB_IoT communication circuit, the signal level conversion circuit, the valve drive power supply circuit and the valve drive circuit; the microcontroller circuit is respectively connected to a pressure monitoring circuit and a data storage circuit.

2. The electronic pressure measuring and cutting device for the gas pipeline network as claimed in claim 1, characterized in that: The system power supply circuit includes a voltage stabilizing module U1, a capacitor E1 and a capacitor C3, wherein pin 1 of the voltage stabilizing module U1 is connected to the negative electrode of the capacitor E1 and one end of the capacitor C3 and is grounded, pin 2 of the voltage stabilizing module U1 is connected to a battery, and pin 3 of the voltage stabilizing module U1 is connected to the positive electrode of the capacitor E1, the second end of the capacitor C3 and the microcontroller circuit.

3. The electronic pressure measuring and cutting device for the gas pipeline network as claimed in claim 1, characterized in that: The communication power supply circuit includes a battery holder J2, a boost chip U3, a diode D1, a diode D4, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor E2, a resistor R3, a resistor R5, a resistor R6 and an inductor L1, wherein the 2nd foot of the battery holder J2 is connected to one end of the capacitor C1, one end of the capacitor C2, the 2nd foot of the boost chip U3, one end of the resistor R3, one end of the capacitor C5 and one end of the capacitor E2, the 1st foot of the battery holder J2 is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the second end of the capacitor C1, the second end of the capacitor C2, the boost chip U3, the resistor R3, the capacitor C5 and the capacitor E2, Pin 6 of the boost chip U3, one end of the inductor L1 and the battery are connected together, and the second end of the inductor L1 is connected to pin 1 of the boost chip U3; pin 5 of the boost chip U3 is connected to one end of the resistor R6, the second end of the capacitor C5, the second end of the capacitor E2, the positive electrode of the diode D4 and the NB_IoT communication circuit; the negative electrode of the diode D4 is connected to the microcontroller circuit, pin 3 of the boost chip U3 is connected to the second end of the resistor R3 and one end of the resistor R5, and the second end of the resistor R5 is connected to the second end of the resistor R6; pin 4 of the boost chip U3 is connected to the microcontroller circuit.

4. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The valve driving power supply circuit includes a valve chip U8 and a capacitor C19, wherein pin 4 of the valve chip U8 is connected to one end of the capacitor C19 and a battery, the second end of the capacitor C19 is grounded, and pin 2 of the valve chip U8 is grounded; pin 5 of the valve chip U8 is connected to the valve driving circuit, pin 1 of the valve chip U8 is left floating, and pin 3 of the valve chip U8 is connected to the microcontroller circuit.

5. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The NB_IoT communication circuit includes a NB_IoT module U7, an antenna base ANT1, a capacitor C17, a capacitor C14, a capacitor C15, a capacitor C16 and a resistor R18, wherein one end of the resistor R18 is connected to pin 15 of the NB_IoT module U7, and the second end of the resistor R18 is connected to the microcontroller circuit; pins 42 and 43 of the NB_IoT module U7 are connected to one end of the capacitor C17, one end of the capacitor C14, one end of the capacitor C15, one end of the capacitor C16 and the communication power supply circuit; the second end of the capacitor C17 is connected to the second end of the capacitor C14, the second end of the capacitor C15 and the second end of the capacitor C16 and is grounded; pin 1 of the antenna base ANT1 is connected to pin 35 of the NB_IoT module U7, and pin 2 of the antenna base ANT1 is grounded; pins 1, 27 and 34 of the NB_IoT module U7 are all grounded.

6. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The SIM card circuit includes a SIM card U9, a resistor R15, a resistor R16, a resistor R17, a capacitor C18, a capacitor C20, a capacitor C21 and a capacitor C22, wherein pin 3 of the SIM card U9 is commonly connected to one end of the resistor R17 and one end of the capacitor C18, the second end of the resistor R17 is connected to the NB_IoT communication circuit, pin 6 of the SIM card U9 is commonly connected to one end of the resistor R16 and one end of the capacitor C20, the second end of the resistor R16 is connected to the NB_IoT communication circuit, pin 7 of the SIM card U9 is commonly connected to one end of the resistor R15 and one end of the capacitor C21, the second end of the resistor R15 is connected to the NB_IoT communication circuit, the second end of the capacitor C18 is commonly connected to the second end of the capacitor C20 and the second end of the capacitor C21 and is grounded; pin 8 of the SIM card U9 is connected to one end of the capacitor C22 and the NB_IoT communication circuit, the second end of the capacitor C22 is connected to pin 1 of the SIM card U9 and is grounded, and pins 2, 4 and 5 of the SIM card U9 are suspended.

7. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The signal level conversion circuit includes a resistor R19, a resistor R20, and a resistor R21, wherein one end of the resistor R19 is connected to the NB_IoT communication circuit, and the second end of the resistor R19 is connected to the microcontroller circuit; one end of the resistor R20 is connected to the microcontroller circuit, the second end of the resistor R20 is connected to one end of the resistor R21 and the NB_IoT communication circuit, and the second end of the resistor R21 is grounded.

8. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The valve drive circuit includes a power socket J6, a valve chip U6, a capacitor C12, a capacitor C13, a resistor R11 and a resistor R14. Pin 1 of the power socket J6 is connected to pin 1 of the valve chip U6, and pin 2 of the power socket J6 is connected to pin 4 of the valve chip U6; one end of the capacitor C12 is connected to one end of the capacitor C13, one end of the resistor R11, one end of the resistor R14, pin 2 of the valve chip U6, pin 3 of the valve chip U6 and the valve drive power circuit; the second end of the capacitor C1 is connected to the second end of the capacitor C13 and is grounded; the second end of the resistor R11 is connected to pin 7 of the valve chip U6 and the microcontroller circuit; the second end of the resistor R14 is connected to pin 6 of the U6 valve chip and the microcontroller circuit; pins 6 and 7 of the valve chip U6 are both grounded.

9. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The data storage circuit includes a storage chip U5, a resistor R12 and a resistor R13. Pins 1, 2, 3, 4 and 7 of the storage chip U5 are grounded together, and pin 8 of the storage chip U5 is connected to one end of the resistor R12, one end of the resistor R13 and a microcontroller circuit; the second end of the resistor R12 is connected to pin 6 of the storage chip U5 and the microcontroller circuit; the second end of the resistor R13 is connected to pin 5 of the storage chip U5 and the microcontroller circuit.

10. The electronic pressure measuring and cutting device for gas pipe network as claimed in claim 1, characterized in that: The pressure monitoring circuit includes an ADC conversion chip U2, a pressure sensor J1, a pressure sensor J3, a resistor R9, a resistor R1, a capacitor C4, a capacitor C9 and an inductor L2; wherein, pin 1 of the ADC conversion chip U2 is connected to the microcontroller circuit, pin 4 of the ADC conversion chip U2 is connected to pin 3 of the pressure sensor J1, pin 5 of the ADC conversion chip U2 is connected to pin 2 of the pressure sensor J1, pin 6 of the ADC conversion chip U2 is connected to pin 1 of the pressure sensor J1, pin 4 of the pressure sensor J1 is connected to pin 4 of the pressure sensor J3, pin 9 of the ADC conversion chip U2, one end of the capacitor C4 and one end of the resistor R1 are connected together, and the second end of the capacitor C4 is connected to the resistor One end of R9 is connected to pin 10 of the ADC conversion chip U2, the second end of the resistor R9 is grounded, the second end of the resistor R1 is grounded, pin 2 of the pressure sensor J3 is connected to pin 7 of the ADC conversion chip U2, pin 1 of the pressure sensor J3 is connected to pin 8 of the ADC conversion chip U2, and pin 3 of the pressure sensor J3 is connected to pin 11 of the ADC conversion chip U2; pin 13 of the ADC conversion chip U2 is connected to one end of the inductor L2 and one end of the capacitor C9, the second end of the inductor L2 is connected to the microcontroller circuit, and the second end of the capacitor C9 is grounded; pin 15 of the ADC conversion chip U2 is connected to the microcontroller circuit; pin 16 of the ADC conversion chip U2 is connected to the microcontroller circuit.

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