An intelligent normally closed emergency shut-off valve application circuit

Abstract

The utility model discloses a kind of intelligent normally closed emergency cut-off valve application circuit, including first communication circuit and second communication circuit, the first communication circuit includes communication chip U2 and antenna interface RF2, the 26 pins of communication chip U2 are electrically connected with the antenna interface RF2 in proper order through inductance SL1, resistance BR11 and capacitor C2;The 16 pins of communication chip U2 are electrically connected with the second end of connector P7 by resistance R24.The utility model discloses a kind of intelligent normally closed emergency cut-off valve application circuit, it is linked through first communication circuit, second communication circuit, voltage acquisition circuit and boost circuit, to realize the near field and far field transmission of data, and real-time detection voltage, when power off, power supply is given to coil by spare battery, to realize the emergency cut-off of power off, it has practicality high, safety high and wide range of application etc.

Description

Technical Field

[0001] This utility model belongs to the field of gas shut-off valve technology, specifically relating to an application circuit for an intelligent normally closed emergency shut-off valve. Background Technology

[0002] Normally closed gas emergency shut-off (electromagnetic) valves play a crucial safety role in gas supply systems. In the event of emergencies such as gas leaks or fires, they can quickly energize the coil, thereby triggering the valve core to cut off the gas supply and prevent the accident from escalating.

[0003] Many existing gas shut-off valves lack remote communication capabilities, making it impossible to remotely view data. They are not convenient or intelligent enough, and they lose their emergency shut-off function when power is cut off, posing certain safety hazards.

[0004] Therefore, further improvements will be made to address the aforementioned issues. Utility Model Content

[0005] The main purpose of this utility model is to provide an intelligent normally closed emergency shut-off valve application circuit, which is linked by a first communication circuit, a second communication circuit, a voltage acquisition circuit and a boost circuit to realize near-field and far-field data transmission, and to detect voltage in real time. In the event of a power failure, the coil is powered by a backup battery to achieve emergency shut-off. It has the advantages of high practicality, high safety and wide applicability.

[0006] To achieve the above objectives, this utility model provides an application circuit for an intelligent normally closed emergency shut-off valve, including a first communication circuit (Bluetooth) and a second communication circuit (NB-IoT), wherein:

[0007] The first communication circuit includes a communication chip U2 (a Bluetooth chip, also serving as a processing chip) and an antenna interface RF2. Pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 via an inductor SL1 (the end of the inductor SL1 furthest from pin 26 is electrically connected to pin 25), a resistor BR11, and a capacitor C2. Pin 16 of the communication chip U2 is electrically connected to the second end of connector P7 (used to connect a pressure sensor (model MPM258) to detect the pressure of the gas in the gas shut-off valve) via a resistor R24. Pin 17 of the communication chip U2... The pin is electrically connected to the first end of connector P7 via resistor R23; pin 22 of the communication chip U2 is electrically connected to connector P6 (used to connect the valve position sensor to detect whether the gas shut-off valve is currently open or closed) via resistor R30, and the end of resistor R30 near connector P6 is also electrically connected to pin 21 of the communication chip U2 (the first communication circuit is used for data processing, monitoring the gas pressure value and valve position status of the gas shut-off valve, and is also used for Bluetooth communication, so that users can view the data through mobile phones and other terminals in the near field).

[0008] The second communication circuit includes a communication chip U3, an antenna interface RF1, and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 via resistor NR11 and capacitor CF1. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 via resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 via resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2. (The second communication circuit enables remote communication via NB-IoT, remotely transmitting the data collected by the communication chip U2 to the backend for remote data viewing.)

[0009] As a further preferred technical solution to the above technical solution, pin 18 of the communication chip U2 is grounded through diode D1, and the cathode of diode D1 is electrically connected to connector P4 (P4 serves as an external signal interface, which can be connected to sensors such as temperature for data acquisition).

[0010] As a further preferred embodiment of the above technical solution, the second communication circuit further includes a SIM card slot (CARD1). Pin 12 of the communication chip U2 is electrically connected to the C3 terminal of the SIM card slot through resistor R13. Pin 13 of the communication chip U2 is electrically connected to the C5 terminal of the SIM card slot through resistor R15. Pin 14 of the communication chip U2 is electrically connected to the C6 terminal of the SIM card slot through resistor R14. Pin 15 of the communication chip U2 is electrically connected to the C1 terminal of the SIM card slot.

[0011] As a further preferred technical solution to the above technical solution, a voltage acquisition circuit is also included. The voltage acquisition circuit includes resistors R19 and R21. The common terminal of resistors R19 and R21 is electrically connected to Schottky diode D6 (one end of Schottky diode D6 is connected to the power supply terminal M4_AVCC and the other end is grounded. By acquiring the voltage, the current power supply status of the gas shut-off valve can be determined, and whether the mains power is supplying it).

[0012] As a further preferred technical solution to the above technical solution, a boost circuit is also included. The boost circuit includes a boost chip U5 and a transistor SQ5. Pin 1 of the transistor SQ5 is electrically connected to the battery power supply terminal (System_2.2-3.6V) through diode FD3 and inductor L3 in sequence. Pin 1 of the boost chip U5 is electrically connected to the common terminal of diode FD3 and inductor L3, and pin 3 of the boost chip U5 is electrically connected to the end of resistor R19 away from resistor R18. Pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 through resistor R40. Pin 5 of the boost chip U5 is electrically connected to the battery power supply terminal in one path and to pin 1 of the transistor SQ5 in the other path through capacitor C42 and capacitor C41.

[0013] Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 via resistor R22, and to the source of the field-effect transistor Q5 via resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 via resistor FR16, and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 via resistor FR8. The output terminal (pins 5-8) of the transistor SQ5 is connected to the coil load interface P5 (P5 is connected to the coil of the gas shut-off valve to energize the coil, so that in the event of an emergency power outage, the battery boost voltage is used to energize the coil to achieve emergency shut-off). Attached Figure Description

[0014] Figure 1 This is the first communication circuit diagram of this utility model.

[0015] Figure 2 This is the second communication circuit diagram of this utility model.

[0016] Figure 3 This is the voltage acquisition circuit diagram of this utility model.

[0017] Figure 4 This is the boost circuit diagram of this utility model. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] This utility model discloses an application circuit for an intelligent normally closed emergency shut-off valve. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0020] In the embodiments of this utility model, those skilled in the art will note that the gas shut-off valve and the like involved in this utility model can be considered as prior art.

[0021] Preferred embodiment.

[0022] like Figure 1-4 As shown, this utility model discloses an application circuit for an intelligent normally closed emergency shut-off valve, including a first communication circuit (Bluetooth) and a second communication circuit (NB-IoT), wherein:

[0023] The first communication circuit includes a communication chip U2 (a Bluetooth chip, also serving as a processing chip) and an antenna interface RF2. Pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 via an inductor SL1 (the end of the inductor SL1 furthest from pin 26 is electrically connected to pin 25), a resistor BR11, and a capacitor C2. Pin 16 of the communication chip U2 is electrically connected to the second end of connector P7 (used to connect a pressure sensor (model MPM258) to detect the pressure of the gas in the gas shut-off valve) via a resistor R24. Pin 17 of the communication chip U2... The pin is electrically connected to the first end of connector P7 via resistor R23; pin 22 of the communication chip U2 is electrically connected to connector P6 (used to connect the valve position sensor to detect whether the gas shut-off valve is currently open or closed) via resistor R30, and the end of resistor R30 near connector P6 is also electrically connected to pin 21 of the communication chip U2 (the first communication circuit is used for data processing, monitoring the gas pressure value and valve position status of the gas shut-off valve, and is also used for Bluetooth communication, so that users can view the data through mobile phones and other terminals in the near field).

[0024] The second communication circuit includes a communication chip U3 (NB-IoT), an antenna interface RF1, and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 via resistor NR11 and capacitor CF1. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 via resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 via resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2. (The second communication circuit enables remote communication via NB-IoT, transmitting the data collected by the communication chip U2 remotely to the backend for remote data viewing.)

[0025] Specifically, pin 18 of the communication chip U2 is grounded through diode D1, and the cathode of diode D1 is electrically connected to connector P4 (P4 serves as an external signal interface, which can be connected to sensors such as temperature sensors for data acquisition).

[0026] More specifically, the second communication circuit also includes a SIM card slot (CARD1). Pin 12 of the communication chip U2 is electrically connected to the C3 terminal of the SIM card slot through resistor R13. Pin 13 of the communication chip U2 is electrically connected to the C5 terminal of the SIM card slot through resistor R15. Pin 14 of the communication chip U2 is electrically connected to the C6 terminal of the SIM card slot through resistor R14. Pin 15 of the communication chip U2 is electrically connected to the C1 terminal of the SIM card slot.

[0027] Furthermore, it also includes a voltage acquisition circuit, which includes resistors R19 and R21. The common terminal of resistors R19 and R21 is electrically connected to Schottky diode D6 (one end of Schottky diode D6 is connected to the power supply terminal M4_AVCC and the other end is grounded. By acquiring the voltage, the current power supply status of the gas shut-off valve can be determined, and whether the mains power is supplying it).

[0028] Furthermore, it also includes a boost circuit, which comprises a boost chip U5 and a transistor SQ5. Pin 1 of the transistor SQ5 is electrically connected to the battery power supply terminal (System_2.2-3.6V) via diode FD3 and inductor L3. Pin 1 of the boost chip U5 is electrically connected to the common terminal of diode FD3 and inductor L3, and pin 3 of the boost chip U5 is electrically connected to the end of resistor R19 away from resistor R18. Pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 via resistor R40. Pin 5 of the boost chip U5 is electrically connected to the battery power supply terminal in one path and to pin 1 of the transistor SQ5 in the other path via capacitors C42 and C41.

[0029] Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 via resistor R22, and to the source of the field-effect transistor Q5 via resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 via resistor FR16, and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 via resistor FR8. The output terminal (pins 5-8) of the transistor SQ5 is connected to the coil load interface P5 (P5 is connected to the coil of the gas shut-off valve to energize the coil, so that in the event of an emergency power outage (when the mains power cannot normally energize the coil), the battery boost voltage is used to energize the coil to achieve emergency shut-off and improve safety).

[0030] It is worth mentioning that the technical features such as the gas shut-off valve involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0031] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An application circuit for an intelligent normally closed emergency shut-off valve, characterized in that, It includes a first communication circuit and a second communication circuit, wherein: The first communication circuit includes a communication chip U2 and an antenna interface RF2. Pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 via an inductor SL1, a resistor BR11, and a capacitor C2. Pin 16 of the communication chip U2 is electrically connected to the second end of connector P7 via a resistor R24. Pin 17 of the communication chip U2 is electrically connected to the first end of connector P7 via a resistor R23. Pin 22 of the communication chip U2 is electrically connected to connector P6 via a resistor R30, and the end of resistor R30 near connector P6 is also electrically connected to pin 21 of the communication chip U2. The second communication circuit includes a communication chip U3, an antenna interface RF1, and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 via resistor NR11 and capacitor CF1. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 via resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 via resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2.

2. The application circuit of an intelligent normally closed emergency shut-off valve according to claim 1, characterized in that, The 18th pin of the communication chip U2 is grounded through diode D1, and the cathode of diode D1 is electrically connected to connector P4.

3. The application circuit of an intelligent normally closed emergency shut-off valve according to claim 2, characterized in that, The second communication circuit also includes a SIM card slot. Pin 12 of the communication chip U2 is electrically connected to the C3 terminal of the SIM card slot through resistor R13. Pin 13 of the communication chip U2 is electrically connected to the C5 terminal of the SIM card slot through resistor R15. Pin 14 of the communication chip U2 is electrically connected to the C6 terminal of the SIM card slot through resistor R14. Pin 15 of the communication chip U2 is electrically connected to the C1 terminal of the SIM card slot.

4. The application circuit of an intelligent normally closed emergency shut-off valve according to claim 3, characterized in that, It also includes a voltage acquisition circuit, which includes resistors R19 and R21, and the common terminal of resistors R19 and R21 is electrically connected to Schottky diode D6.

5. The application circuit of an intelligent normally closed emergency shut-off valve according to claim 4, characterized in that, It also includes a boost circuit, which includes a boost chip U5 and a transistor SQ5. Pin 1 of the transistor SQ5 is electrically connected to the battery power supply terminal through diode FD3 and inductor L3 in sequence. Pin 1 of the boost chip U5 is electrically connected to the common terminal of diode FD3 and inductor L3, and pin 3 of the boost chip U5 is electrically connected to the end of resistor R19 away from resistor R18. Pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 through resistor R40. Pin 5 of the boost chip U5 is electrically connected to the battery power supply terminal in one path and to pin 1 of the transistor SQ5 in the other path through capacitor C42 and capacitor C41. Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 via resistor R22, and is also electrically connected to the source of the field-effect transistor Q5 via resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 via resistor FR16, and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 via resistor FR8. The output of the transistor SQ5 is connected to the coil load interface P5.

Images