Intelligent wireless safety valve

Abstract

The utility model relates to the technical field of valves, in particular to an intelligent wireless safety valve, which comprises a main control unit, a wireless communication unit, a power supply unit, a valve driving unit and a travel switch, the wireless communication unit, the power supply unit and the valve driving unit are all electrically connected with the main control unit, and the travel switch is electrically connected with the main control unit. The valve driving unit is used for driving the travel switch, and the on-off state detection unit is electrically connected with the main control unit and is used for detecting the on-off state of the travel switch. According to the utility model, on-off state detection can be realized, so that the closing or opening state of the valve can be mastered in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an intelligent wireless safety valve. Background Art

[0002] Safety valves are components required in pipeline transportation, especially in gas transportation systems. Safety valves are needed to cut off and unblock gas transportation. For example, when a gas leak is detected, a safety valve is needed to cut off the continued transportation of gas to prevent the danger from further expanding.

[0003] Traditional safety valves are generally opened and closed manually. With the development of wireless technology, wireless safety valves have begun to emerge. By arranging wireless communication modules and drive modules in the safety valve assembly, remote valve closing can be achieved, and the potential safety hazards of manual valve closing on site can be avoided by remote valve closing. However, electronic drives inevitably have certain errors. For example, if the switch does not perform the valve closing action or the valve is not closed in place, the gas will continue to be transported, which may cause safety accidents. Moreover, since the valve closing control command has been issued remotely, it is believed that the gas has stopped being transported, which may cause the safety accident to not be remedied in time. Utility Model Content

[0004] The utility model aims to provide an intelligent wireless safety valve, which can not only realize remote valve closing, but also detect the valve status to ensure whether the valve has been fully closed in an emergency, thereby ensuring gas safety.

[0005] In order to achieve the above-mentioned utility model object, the utility model embodiment provides the following technical solutions:

[0006] An intelligent wireless safety valve comprises a main control unit, a wireless communication unit, a power supply unit, a valve drive unit, and a travel switch. The wireless communication unit, the power supply unit, and the valve drive unit are all electrically connected to the main control unit. The valve drive unit is used to drive the travel switch. The valve also comprises a switch state detection unit. The switch state detection unit is electrically connected to the main control unit and is used to detect the switch state of the travel switch.

[0007] As an example of a feasible implementation method, the switch state detection unit includes a mechanical detection switch connector, one pin of the mechanical detection switch connector is grounded, and another pin is connected to a travel switch and is grounded through a second capacitor.

[0008] As an example of an implementable embodiment, the power supply unit includes a lithium battery, the positive terminal of the lithium battery is connected to the VIN pin of the LDO power chip through a diode, the VIN pin of the LDO power chip is also grounded through a third capacitor BC20, the VOUT pin of the LDO power chip is grounded through two parallel filter capacitors, and is also connected to the power pin VCC_MCU of the main control unit through a third resistor, one end of the third resistor connected to the main control unit is also connected in series with a fourth resistor, polarity capacitor one, and polarity capacitor two, the other end of polarity capacitor two is connected to a 0 ohm adjustment line, and both ends of polarity capacitor two are connected in parallel with a fifth resistor.

[0009] As an example of an implementable embodiment, the valve drive unit includes a power boost chip, a PMOS tube and a first NPN transistor. The VCC pin of the power boost chip is connected to the power pin end VCC_MCU of the main control unit through the sixth resistor, and is also connected to the DRV_ENA function end of the main control unit and grounded through the seventh resistor; the SWC pin end of the power boost chip is connected to a diode, the cathode end of the diode is connected to the source of the PMOS tube, the drain of the PMOS tube is grounded through the fourth capacitor FC9, and is connected to the valve switch at the same time, the drain of the PMOS tube is connected to the collector of the NPN transistor, the emitter of the NPN transistor is grounded, the base of the NPN transistor is connected to the MTA_C1 function end of the main control unit through the eighth resistor, and the cathode end of the diode is also grounded through polarity capacitor three.

[0010] As an example of an implementable embodiment, the main control unit includes an MCU chip, the VCAP pin of the MCU chip is grounded through two parallel capacitors, the AIN4 pin end of the MCU chip serves as the BAT_VREF1 function end, its AIN5 pin end serves as the VS_EXT function end, its AIN6 pin end serves as the BAT_CHK_OUT function end, its LVDIN1 pin end serves as the MTA_C1 function end, and its VCIN3 pin end serves as the DRV_ENA function end.

[0011] In a more optimized solution, a power state detection unit electrically connected to the main control unit is further included to detect the power voltage state. In this solution, by detecting the power voltage state, corresponding measures can be taken in time when the power is off or in a low voltage state, thereby avoiding the problem that the safety valve cannot function when necessary due to power shortage.

[0012] As an example of a feasible implementation method, the power status detection unit includes a second NPN transistor and a PNP transistor, the base of the second NPN transistor is connected to the BAT_CHK_OUT function terminal of the main control unit through a ninth resistor, the emitter of the second NPN transistor is grounded, and its collector is connected to a tenth resistor and an eleventh resistor connected in series with each other, and the other end of the eleventh resistor is connected to a DC power supply, the base of the PNP transistor is connected between the tenth resistor and the eleventh resistor, its emitter is connected to the DC power supply, and its collector is connected to a twelfth resistor and a thirteenth resistor connected in series with each other, and the other end of the thirteenth resistor is grounded, and the VS_EXT function terminal of the main control unit is connected between the twelfth resistor and the thirteenth resistor, and is also grounded through a filter capacitor.

[0013] As an example of an implementable embodiment, the power status detection unit also includes a fourteenth resistor and a fifteenth resistor connected in series, the other end of the fourteenth resistor is connected to the DC power supply, the other end of the fifteenth resistor is grounded, the BAT_VREF1 functional end of the main control unit is connected between the fourteenth resistor and the fifteenth resistor, and the BAT_VREF1 functional end of the main control unit is also grounded through a filter capacitor.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1) The wireless unit can communicate with the remote control end, for example, receiving the control command of the remote control end to realize remote valve closing.

[0016] 2) The switch status detection unit can detect the status of the travel switch in real time to ensure that the valve is closed and fully closed when it needs to be closed, thereby avoiding safety accidents caused by the valve receiving the valve closing command but not actually closing.

[0017] 3) The power status detection unit can realize real-time detection of the power voltage status to avoid the safety valve from not working properly due to power failure or low voltage.

[0018] 4) The entire circuit system has low power consumption, simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The following is a block diagram of the functional units arranged in the circuit board.

[0021] Figure 2 The electrical schematic diagram of the power supply unit is shown as an example.

[0022] Figure 3 The electrical schematic diagram of the valve drive unit is shown as an example.

[0023] Figure 4 The electrical schematic diagram of the switch state detection unit is shown as an example.

[0024] Figure 5 The electrical schematic diagram of the power status detection unit is shown as an example.

[0025] Figure 6 The electrical schematic diagram of the main control unit is used as an example.

[0026] Figure 7 The electrical schematic diagram of the manual valve closing unit is shown as an example. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0028] like Figure 1 As shown, the intelligent wireless safety valve provided in this embodiment includes a valve body and a control circuit board. The valve body includes a travel switch. The control circuit board is arranged with a main control unit, a wireless communication unit, a power supply unit, a valve drive unit and a closed state detection unit. The wireless communication unit, the power supply unit, the valve drive unit and the closed state detection unit are all electrically connected to the main control unit. The valve drive unit is used to drive the travel switch, and the switch state detection unit is used to detect the switch state of the travel switch in the valve body.

[0029] like Figure 2As shown, the power supply unit includes a 2-3V lithium battery BAT1, and the lithium battery power supply can meet the application for more than 5 years. The positive terminal of the lithium battery BAT1 is connected to the VIN pin of the LDO power chip BU3 through a diode BD8, and the VIN pin of the LDO power chip is grounded through the third capacitor BC20 at the same time to ensure the stability of the input voltage. The VOUT pin of the LDO power chip is grounded through two parallel filter capacitors BC21 and filter capacitor BC22, and the output voltage is guaranteed by capacitor filtering. The VOUT pin of the LDO power chip is also connected to the power pin VCC_MCU of the main control unit through the third resistor BD6 to power the main control unit. At the same time, the end of the third resistor BD6 connected to the main control unit is also connected in series with the fourth resistor R30, the polarity capacitor one C26, and the polarity capacitor two C41, and the other end of the polarity capacitor two C41 is connected to the 0 ohm adjustment line JP1, and the two ends of the polarity capacitor two C41 are connected in parallel with the fifth resistor R31.

[0030] The polar capacitors C26 and C41 are large-capacity capacitors, and the fifth resistor R31 is an ohm-level short-circuit resistor. When the power is small, the capacitor is not needed and can be directly turned on. The fourth resistor R30 is a current-limiting resistor to prevent the polar capacitor from being instantly connected to the ground. The above power supply unit structure can provide a stable standard voltage.

[0031] See also Figure 3 The valve drive unit includes a power boost chip FU3, a PMOS tube FQ2 and a first NPN transistor FQ3. The VCC pin of the power boost chip FU3 is connected to the power pin end VCC_MCU of the main control unit through the sixth resistor FR17, and is also connected to the DRV_ENA function end of the main control unit, and is grounded through the seventh resistor FC6. The SWC pin end of the power boost chip FU3 is connected to a diode FD1, the cathode end of the diode FD1 is connected to the source of the PMOS tube FQ2, the drain of the PMOS tube FQ2 is grounded through the fourth capacitor FC9, and is connected to the valve switch FM1, the drain of the PMOS tube FQ2 is connected to the collector of the first NPN transistor FQ3, the emitter of the first NPN transistor FQ3 is grounded, and the base of the first NPN transistor FQ3 is connected to the MTA_C1 function end of the main control unit through the eighth resistor FR16. The cathode end of the diode FD1 is also grounded through the polarity capacitor FE4, and filtering is performed through the capacitor FE4. The PMOS tube FQ2 and the first NPN transistor FQ3 form a power enable switch, which is enabled when the valve needs to be driven.

[0032] See also Figure 4The switch state detection unit includes a mechanical detection switch connector J1, one of the pins of the mechanical detection switch connector J1 is grounded, and the other pin is connected to the travel switch KEY2 and is grounded through the second capacitor C67. In this circuit unit, the switch state is detected by detecting whether the travel switch is pressed (determining whether it is pressed by whether it is in contact) through the mechanical detection switch connector J1, which can ensure the accuracy of the valve switch state.

[0033] A power state detection unit may also be arranged in the circuit board to detect the voltage state of the power supply.

[0034] See also Figure 5 The power state detection unit includes a second NPN transistor AQ3 and a PNP transistor AQ4. The base of the second NPN transistor AQ3 is connected to the BAT_CHK_OUT function terminal of the main control unit through the ninth resistor AR17. The emitter of the second NPN transistor AQ3 is grounded, and its collector is connected to the tenth resistor AR5 and the eleventh resistor AR15 connected in series. The other end of the tenth resistor AR15 is connected to the DC power supply V_LR6_ADC. The base of the PNP transistor AQ4 is connected between the tenth resistor AR5 and the eleventh resistor AR15, and its emitter is connected to the DC power supply V_LR6_ADC. The collector is connected to the twelfth resistor AR4 and the thirteenth resistor AR16 connected in series. The other end of the thirteenth resistor AR16 is grounded. The VS_EXT function terminal of the main control unit is connected between the twelfth resistor AR4 and the thirteenth resistor AR16, and is also grounded through a filter capacitor AC11. In this circuit unit, the NPN transistor AQ3 and the PNP transistor AQ4 form a detection switch for detecting whether the power supply is off.

[0035] The power state detection unit also includes a fourteenth resistor AR18 and a fifteenth resistor AR19 connected in series, the other end of the fourteenth resistor AR18 is connected to a DC power supply, the other end of the fifteenth resistor AR19 is grounded, the BAT_VREF1 function end of the main control unit is connected between the fourteenth resistor AR18 and the fifteenth resistor AR19, and the BAT_VREF1 function end of the main control unit is also grounded through a filter capacitor AC22 to ensure the stability of the voltage at the pin end. In this circuit unit, the fourteenth resistor AR18 and the fifteenth AR19 are used for voltage detection to detect whether the power supply is in a low voltage state.

[0036] See also Figure 6The main control unit includes an MCU chip AU1, a VCAP pin of the MCU chip AU1 is grounded through two parallel capacitors AC6 and AC5, an AIN4 pin end of the MCU chip AU1 serves as a BAT_VREF1 function end, an AIN5 pin end thereof serves as a VS_EXT function end, an AIN6 pin end thereof serves as a BAT_CHK_OUT function end, an LVDIN1 pin end thereof serves as an MTA_C1 function end, and a VCIN3 pin end thereof serves as a DRV_ENA function end.

[0037] The entire circuit system is powered by a low-voltage power supply, and the power supply voltage status is detected in real time. When the power is off or the voltage is low, the power supply voltage status will be detected in real time. After receiving the valve closing command, the valve drive unit directly drives the valve closing action, and at the same time detects in real time whether the mechanical switch is closed in place to ensure whether the valve is closed or open.

[0038] The wireless unit can be, for example, Bluetooth, which can communicate data with the remote control terminal through Bluetooth to achieve remote valve closing. After receiving the remote valve closing signal, the valve driving unit drives the travel switch to perform the valve closing action, and the switch state detection unit feeds back the valve execution result and the valve state to ensure that the valve is in a closed state when necessary. In addition, the switch state detection unit can automatically feed back the current state of the valve to the remote control terminal when reading information every day in cooperation with the remote control terminal.

[0039] Of course, this intelligent wireless safety valve has the function of manually closing and opening the valve, and can also close the valve on site through the handheld device App. Figure 7 As shown, a manual valve closing unit is also included which is electrically connected to the main control unit. The manual valve closing unit includes a Hall chip S1. The VIN pin of the Hall chip S1 is connected to the power pin end of the main control unit. The VOUT pin of the Hall chip S1 is connected to the trigger switch KEY. The VOUT pin of the Hall chip S1 is also grounded through a first capacitor C40 and connected to the power pin end of the main control unit through a first resistor R5.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An intelligent wireless safety valve, comprising a main control unit, a wireless communication unit, a power supply unit, a valve drive unit, and a travel switch, wherein the wireless communication unit, the power supply unit, and the valve drive unit are all electrically connected to the main control unit, and the valve drive unit is used to drive the travel switch, characterized in that: It also includes a switch state detection unit, which is electrically connected to the main control unit and is used to detect the switch state of the travel switch.

2. The intelligent wireless safety valve according to claim 1, characterized in that: The switch state detection unit comprises a mechanical detection switch connector, one pin of which is grounded, and the other pin is connected to the travel switch and is grounded via a second capacitor.

3. The intelligent wireless safety valve according to claim 1, characterized in that: The power supply unit includes a lithium battery, the positive terminal of the lithium battery is connected to the VIN pin of the LDO power chip through a diode, the VIN pin of the LDO power chip is grounded through a third capacitor BC20, the VOUT pin of the LDO power chip is grounded through two parallel filter capacitors, and is also connected to the power pin VCC_MCU of the main control unit through a third resistor, one end of the third resistor connected to the main control unit is also connected in series with a fourth resistor, a polarity capacitor 1, and a polarity capacitor 2, the other end of the polarity capacitor 2 is connected to a 0 ohm adjustment line, and both ends of the polarity capacitor 2 are connected in parallel with a fifth resistor.

4. The intelligent wireless safety valve according to claim 1, characterized in that: The valve drive unit includes a power boost chip, a PMOS tube and a first NPN transistor. The VCC pin of the power boost chip is connected to the power pin end VCC_MCU of the main control unit through the sixth resistor, and is also connected to the DRV_ENA function end of the main control unit and grounded through the seventh resistor; the SWC pin end of the power boost chip is connected to a diode, the negative end of the diode is connected to the source of the PMOS tube, the drain of the PMOS tube is grounded through the fourth capacitor FC9, and is connected to the valve switch at the same time, the drain of the PMOS tube is connected to the collector of the NPN transistor, the emitter of the NPN transistor is grounded, the base of the NPN transistor is connected to the MTA_C1 function end of the main control unit through the eighth resistor, and the negative end of the diode is also grounded through polarity capacitor three.

5. The intelligent wireless safety valve according to claim 1, characterized in that: The main control unit includes an MCU chip, the VCAP pin of the MCU chip is grounded through two parallel capacitors, the AIN4 pin end of the MCU chip serves as the BAT_VREF1 function end, the AIN5 pin end serves as the VS_EXT function end, the AIN6 pin end serves as the BAT_CHK_OUT function end, the LVDIN1 pin end serves as the MTA_C1 function end, and the VCIN3 pin end serves as the DRV_ENA function end.

6. The intelligent wireless safety valve according to claim 1, characterized in that: It also includes a power supply status detection unit electrically connected to the main control unit and used for detecting the power supply voltage status.

7. The intelligent wireless safety valve according to claim 6, characterized in that: The power state detection unit includes a second NPN transistor and a PNP transistor, the base of the second NPN transistor is connected to the BAT_CHK_OUT function end of the main control unit through a ninth resistor, the emitter of the second NPN transistor is grounded, the collector thereof is connected to a tenth resistor and an eleventh resistor connected in series with each other, the other end of the eleventh resistor is connected to a DC power supply, the base of the PNP transistor is connected between the tenth resistor and the eleventh resistor, the emitter thereof is connected to the DC power supply, the collector thereof is connected to a twelfth resistor and a thirteenth resistor connected in series with each other, the other end of the thirteenth resistor is grounded, the VS_EXT function end of the main control unit is connected between the twelfth resistor and the thirteenth resistor, and is also grounded through a filter capacitor.

8. The intelligent wireless safety valve according to claim 7, characterized in that: The power status detection unit also includes a fourteenth resistor and a fifteenth resistor connected in series, the other end of the fourteenth resistor is connected to the DC power supply, the other end of the fifteenth resistor is grounded, the BAT_VREF1 function end of the main control unit is connected between the fourteenth resistor and the fifteenth resistor, and the BAT_VREF1 function end of the main control unit is also grounded through a filter capacitor 2.

9. The intelligent wireless safety valve according to claim 1, characterized in that: It also includes a manual valve closing unit, which includes a Hall chip, a VIN pin of the Hall chip is connected to the power pin end of the main control unit, a VOUT pin of the Hall chip is connected to the trigger switch, and the VOUT pin of the Hall chip is also grounded through a first capacitor and connected to the power pin end of the main control unit through a second resistor.

Images