Electric fire pump control device controlled by integrated power supply

Abstract

The utility model provides an electric fire pump control device controlled by an integrated power supply, which comprises a central processing unit module, a sensor acquisition circuit, a first relay output circuit, a voltage acquisition module, a current acquisition module and a second relay output circuit, the voltage acquisition module is used for acquiring a voltage value of an alternating current power supply of the dual-power-supply controller; the current acquisition module is used for acquiring a current value of an alternating current power supply of the dual-power-supply controller; the first relay output circuit is connected with the dual-power controller and is used for controlling the dual-power controller to perform dual-power switching; the central processor module is connected with the voltage acquisition module, and the current acquisition module is connected with the first relay output circuit and used for controlling the first relay output circuit to act according to the voltage value and the current value of the alternating current power supply so as to control the dual-power-supply controller.

Description

Technical Field

[0001] This utility model relates to the field of control, specifically to an electric fire pump control device with integrated power supply control. Background Technology

[0002] In intelligent fire protection electrical control systems, integrated power supply control devices for electric fire pumps and dual-power controllers are indispensable fire protection electrical control devices. The dual-power control cabinet consists of a primary power supply and a backup power supply. When the primary power supply fails for various reasons and cannot be restored quickly, it must automatically switch to the backup power supply to ensure the reliability and continuity of power supply.

[0003] Current integrated power supply control devices for electric fire pumps are developing towards higher integration and intelligence. The core utilizes a microprocessor or PLC, integrating multiple sensor interfaces and communication modules (such as CAN, Ethernet, 4G / 5G). They support remote command interaction and cloud platform data synchronization. Functionally, they can achieve automatic start / stop, variable frequency speed control, intelligent switching between multiple pumps, and multiple protections such as overload and phase loss. Some high-end products also introduce adaptive PID algorithms to optimize pressure regulation accuracy. Furthermore, the human-machine interface is trending towards touchscreens and is equipped with fault self-diagnosis and early warning systems.

[0004] However, most current integrated power supply control devices for electric fire pumps cannot control the dual power supply controller when the voltage or current is abnormal. A highly intelligent control device that can operate the dual power supply controller when detecting voltage or current abnormalities is what is needed now.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated power supply control device for electric fire pumps.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an electric fire pump control device with integrated power control, including a central processing unit module, a sensor acquisition circuit, and a first relay output circuit. The central processing unit module is connected to the sensor acquisition circuit and the first relay output circuit, respectively, and the first relay output circuit is connected to the fire pump.

[0008] The electric fire pump control device also includes a voltage acquisition module, a current acquisition module, and a second relay output circuit.

[0009] The voltage acquisition module is used to acquire the voltage value of the AC power supply of the dual power controller;

[0010] The current acquisition module is used to acquire the current value of the AC power supply of the dual power controller;

[0011] The second relay output circuit is connected to the dual power controller and is used to control the dual power controller to switch between dual power supplies.

[0012] The central processing unit module is connected to the voltage acquisition module, the current acquisition module, and the two relay output circuits. It is used to control the operation of the second relay output circuit based on the voltage and current values ​​of the AC power supply, so as to control the dual power supply controller to switch power supplies.

[0013] Specifically, the voltage acquisition module includes three voltage acquisition circuits, each of which includes a resistor series, an LC filter, and an RC filter. A reference voltage is also connected to the connection point between the multiple series resistors and the LC filter.

[0014] The three voltage acquisition circuits are connected to the three phases of a three-phase three-wire AC power supply, and a resistor series is connected in parallel between any two phases.

[0015] Specifically, the current acquisition module includes four current acquisition circuits. Each current acquisition circuit includes a current transformer, an LC filter, and an RC filter. The current transformers of the four current acquisition circuits are respectively connected to the three phases and the neutral line of the three-phase three-wire AC power.

[0016] This utility model has substantial features and progress compared to the prior art. Specifically, the electric fire pump control device of this utility model integrates sensor acquisition and voltage and current sampling of the dual power controller. The voltage and current of the dual power controller are collected through the voltage acquisition module and the current acquisition module. The dual power controller can be controlled when the voltage or current is abnormal to ensure the safety of the fire pump.

[0017] Furthermore, this utility model includes an indicator module for indicating the controller's working status and relay output status, and a communication module for connecting to a host computer to read AC voltage and sensor data, alarm information, and configuration parameter information. The host computer can reconfigure its relevant parameter values ​​through CAN communication and save them in the storage module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of embodiment 1 of the present invention.

[0019] Figure 2 This is a circuit diagram of the voltage acquisition module of Embodiment 2 of this utility model.

[0020] Figure 3 This is a circuit diagram of the current acquisition module of Embodiment 2 of this utility model.

[0021] Figure 4 This is a circuit diagram of the central processing unit module of Embodiment 2 of this utility model.

[0022] Figures 5(a) and 5(b) are circuit diagrams of the first relay output circuit and the second relay output circuit of Embodiment 2 of this utility model.

[0023] Figure 6 This is a circuit diagram of the sensor signal acquisition module of Embodiment 2 of this utility model. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0025] Example 1

[0026] This embodiment provides an electric fire pump control device with integrated power control, which is connected to a dual power controller and a fire pump respectively.

[0027] Specifically, such as Figure 1 As shown, the integrated power control electric fire pump control device includes: a central processing unit module, a sensor acquisition circuit, and a first relay output circuit. The central processing unit module is connected to the sensor acquisition circuit and the first relay output circuit, respectively. The first relay output circuit is connected to the fire pump.

[0028] The sensor acquisition circuit is connected to a pressure sensor and is used to acquire pressure data of the fire protection pipeline network.

[0029] The first relay output circuit is connected to the fire pump and is used to control the start and stop of the fire pump;

[0030] The central processing unit module is connected to the sensor acquisition circuit and the second relay output circuit, and is used to control the operation of the first relay output circuit based on sensor information to control the start and stop of the electric fire pump. Specifically, a start threshold can be preset. When the sensor information received by the central processing unit module is abnormal, such as being lower or higher than the preset start threshold, the electric fire pump is started and stopped through the relay output module.

[0031] Furthermore, the electric fire pump control device also includes a voltage acquisition module, a current acquisition module, and a second relay output circuit;

[0032] The voltage acquisition module is used to acquire the voltage value of the AC power supply of the dual power controller;

[0033] The current acquisition module is used to acquire the current value of the AC power supply of the dual power controller;

[0034] The second relay output circuit is connected to the dual power controller and is used to control the dual power controller to switch between dual power supplies.

[0035] The central processing unit module is connected to the voltage acquisition module, the current acquisition module, and the two relay output circuits. It is used to control the operation of the second relay output circuit based on the voltage and current values ​​of the AC power supply, so as to control the dual power supply controller to switch power supplies.

[0036] In use, the voltage acquisition module acquires the voltage value of the AC power supply of the dual power controller and sends it to the central processing unit module;

[0037] The current acquisition module acquires the current value of the AC power supply of the dual power controller and sends it to the central processing unit module.

[0038] When the voltage value received by the central processing unit module is abnormal, such as being lower than or higher than a preset threshold, the relay output module controls the dual power controller to switch to the backup power supply.

[0039] Similarly, when the current value received by the central processing unit module is abnormal, such as being lower than or higher than a preset threshold, the dual power controller is controlled by the relay output module to switch the power supply.

[0040] It is understood that the output circuit of the second relay is connected to the dual power automatic transfer switch of the dual power controller so that the power supply can be switched in time when the power supply is abnormal, so as to protect the fire pump and not affect the use of the fire pump.

[0041] In practical implementation, the electric fire pump also includes a data storage module, an indicator module, and a communication module, which are respectively connected to the central processing unit module.

[0042] Specifically, the data storage module includes an external 256KB EEPROM, and the communication module includes a LINK port, a USB port, and a CAN port.

[0043] The indicator module includes LED indicator lights, which are used to display the controller's working status, relay operation status, and alarm status, etc., and can be configured according to requirements.

[0044] In use, the communication module can upload the AC voltage / current and sensor data information collected by the voltage acquisition module, the current acquisition module, and the sensor acquisition circuit, as well as the alarm information generated by the central processing unit module, to the host computer; of course, the host computer can also reconfigure the relevant parameter values ​​of the central processing unit module and save them in the data storage module.

[0045] Example 2

[0046] The difference between this embodiment and Embodiment 1 is that it provides a specific embodiment of the electric fire pump control device, as follows: Figure 2 As shown in -5.

[0047] Specifically, such as Figure 2 As shown, the voltage acquisition module includes three voltage acquisition circuits. Each voltage acquisition circuit includes a resistor series, an LC filter, and an RC filter. A reference voltage is also connected to the connection point between the multiple series resistors and the LC filter.

[0048] The three voltage acquisition circuits are connected to the three phases of a three-phase three-wire AC power supply, and a resistor series is connected in parallel between any two phases.

[0049] like Figure 2 As shown, a resistor string consisting of R77, R177, and R78 is connected in parallel between phase A voltage and phase B voltage; a resistor string consisting of R191, R174, and R192 is connected in parallel between phase A voltage and phase C voltage; and a resistor string consisting of R68, R173, and R69 is connected in parallel between phase B voltage and phase C voltage.

[0050] The first voltage acquisition circuit is connected to the A-phase voltage. Specifically, the first voltage acquisition circuit is connected to ferrite bead L5 via a series of five resistors R70-R74 of the same type. Ferrite bead L5 and capacitor C37 form an LC filter. The rear end of ferrite bead L5 is also connected to the input pin GEN_Ua_In of the central processing unit via an RC filter composed of resistor R75 and capacitor C38. The connection point between ferrite bead L5 and resistor R74 is also connected to the reference voltage Vref via resistor R76 to raise the detection voltage.

[0051] In this embodiment, five resistors R70-R74 are connected in series to form the sampling resistor, taking into account the voltage withstand capability of the resistors. Using multiple resistors can prevent resistor breakdown and is more suitable for high-voltage, high-impedance applications.

[0052] The second voltage acquisition circuit is connected to the B-phase voltage. Specifically, the second voltage acquisition circuit is connected to ferrite bead L6 via a series of five resistors R79-R83 of the same type. Ferrite bead L6 and capacitor C39 form an LC filter. The rear end of ferrite bead L6 is connected to the input pin GEN_Ub_In of the central processing unit via an RC filter composed of resistor R84 and capacitor C40. The connection point between ferrite bead L6 and resistor R83 is also connected to the reference voltage Vref via resistor R85.

[0053] The third voltage acquisition circuit is connected to the C-phase voltage. Specifically, the third voltage acquisition circuit is connected to ferrite bead L4 via a series of five resistors R61-R65 of the same type. Ferrite bead L4 and capacitor C35 form an LC filter. The rear end of ferrite bead L4 is connected to the input pin GEN_Uc_In of the central processing unit via an RC filter composed of resistor R66 and capacitor C36. The connection point between ferrite bead L4 and resistor R65 is also connected to the reference voltage Vref via resistor R67.

[0054] Furthermore, such as Figure 3 As shown, the current acquisition module includes four current acquisition circuits. Each current acquisition circuit includes a current transformer, an LC filter, and an RC filter. The current transformers of the four current acquisition circuits are respectively connected to the three phases and the neutral line of a three-phase three-wire AC power supply.

[0055] Specifically, the first current acquisition circuit acquires the current of the neutral line of a three-phase three-wire AC power supply. Specifically, the first current acquisition circuit includes a current transformer TC1. A resistor R89 ​​is connected in parallel to the secondary winding of the current transformer TC1. One secondary winding of the current transformer TC1 is connected to a reference voltage, and the other secondary winding pin is connected to the input pin GEN_In_In of the central processing unit via an LC filter composed of a ferrite bead L7 and a capacitor C41, and an RC filter composed of a resistor R86 and a capacitor C42.

[0056] The second current acquisition circuit acquires the current of the neutral line in a three-phase three-wire AC power supply. Specifically, the second current acquisition circuit includes a current transformer TC2. A resistor R89 ​​is connected in parallel to the secondary side of the current transformer TC2. One secondary side of the current transformer TC2 is connected to a reference voltage, and the other secondary pin is connected to the input pin GEN_Ic_In of the central processing unit through an LC filter composed of a ferrite bead L8 and a capacitor C43, and an RC filter composed of a resistor R88 and a capacitor C44.

[0057] The third current acquisition circuit acquires the current of the neutral line in a three-phase three-wire AC power supply. Specifically, the third current acquisition circuit includes a current transformer TC3. A resistor 91 is connected in parallel to the secondary side of the current transformer TC3. One secondary side of the current transformer TC3 is connected to a reference voltage, and the other secondary pin is connected to the input pin GEN_Ib_In of the central processing unit through an LC filter composed of a ferrite bead L9 and a capacitor C45, and an RC filter composed of a resistor R90 and a capacitor C46.

[0058] The fourth current acquisition circuit acquires the current of the neutral line in a three-phase three-wire AC power supply. Specifically, the fourth current acquisition circuit includes a current transformer TC4. A resistor R93 is connected in parallel to the secondary side of the current transformer TC4. One secondary side of the current transformer TC4 is connected to a reference voltage, and the other secondary pin is connected to the input pin GEN_Ia_In of the central processing unit through an LC filter composed of a ferrite bead L10 and a capacitor C47, and an RC filter composed of a resistor R92 and a capacitor C48.

[0059] like Figure 4 The diagram shown is a circuit diagram of the central processing unit module.

[0060] Figures 5(a) and 5(b) show circuit diagrams of the first relay output circuit and the second relay output circuit, respectively.

[0061] As can be seen, each relay switch circuit includes a transistor, a reverse diode, an LED, and a relay. The control port of the central processing unit module is connected to the base of the transistor through a resistor divider circuit. The power supply is connected to the collector of the transistor through the reverse diode. The LED and the energized coil of the relay are also connected in parallel across the reverse diode. The two sets of contact switches of the relay are respectively connected to a dual power controller or a water pump.

[0062] like Figure 6 As shown, the sensor signal acquisition module includes a sensor signal input terminal, a first control branch, a second control branch, a sampling circuit, and a third control branch. It also includes a reference voltage, which is connected to the sensor signal input terminal in sequence via a first switching transistor, a diode, a first voltage divider resistor, and a second voltage divider resistor. The connection point between the second voltage divider resistor and the sensor signal input terminal is grounded through a filter capacitor to reduce interference.

[0063] The first control branch is connected to the control terminal of the first switching transistor, and the second control branch is connected to the connection point of the first voltage divider resistor and the second voltage divider resistor.

[0064] The connection point of the diode and the first voltage divider resistor is connected in series with the first resistor to form the first output terminal, and the connection point of the second voltage divider resistor and the filter capacitor is connected in series with the second resistor to form the second output terminal.

[0065] The sampling of the resistance sensor and the current sensor is achieved by controlling the high and low levels of the output of the first control branch and the second control branch.

[0066] The sampling resistor is connected in series to the connection point between the sensor signal input terminal and the second output branch, that is, connected in series to the connection point between the sensor signal input terminal and the fourth resistor. The third control branch is connected to the connection point between the sampling resistor and the second output branch to achieve sampling of the signal.

[0067] like Figure 6 As shown, the first switching transistor is a PNP transistor Q10;

[0068] The first control branch includes a first control terminal SENSOR3 TS O1 and a third resistor R95. The first control terminal SENSOR3 TS O1 is connected to the base of the PNP transistor Q10 through the third resistor R95.

[0069] The second control branch includes a second control terminal SENSOR3TS O1, a fourth resistor R101, and a second switching transistor. Preferably, the second switching transistor is an NPN transistor Q11. The second control terminal SENSOR3TS O1 is connected to the base of the NPN transistor Q11 through the fourth resistor R101.

[0070] The first output branch includes a first resistor R97 and a diode clamping protection circuit consisting of diodes D36 and D38. It is understood that a filter capacitor C50 is provided after the first resistor R97 to filter out interference.

[0071] VCC is grounded through diodes D36 and D38 configured in reverse. The first signal output terminal is connected to the junction of diodes D36 and D38 and then to the processor.

[0072] When the Vin1 voltage is greater than VCC, diode D36 is obviously turned on and diode D38 is turned off. The voltage SENSOR3 Inl output by the first signal output terminal is equal to VCC + 0.7V.

[0073] When the Vin1 voltage is between VCC and GND, both diodes D36 and D38 are turned off, and the output voltage of Vout is equal to Vin1; when the Vin1 voltage is less than GND, then diode D38 is turned on, diode D36 is turned off, and the output voltage SENSOR3 Inl of the first signal output terminal is equal to GND-0.7V.

[0074] Therefore, regardless of the external input voltage Vin1, the voltage SENSOR3In1 output from the first signal output terminal is always clamped and limited between VCC+0.7 and GND-0.7, thus protecting the downstream processor from overvoltage damage. Preferably, VCC is 3.3V.

[0075] Similarly, the second output branch includes a second resistor R106, a capacitor C55, and a diode clamping protection circuit composed of diodes D40 and D42. The diode clamping protection circuit is used to protect the downstream processor from overvoltage damage.

[0076] Specifically, the third control branch includes a third control terminal SENSOR3 TS O3 and a pull-up resistor R109. The third control terminal SENSOR3 TS O3 is connected to the connection point between the sampling resistor R107 and the second output branch through the pull-up resistor R109, that is, connected to the fourth resistor R103.

[0077] The working principle is as follows:

[0078] The first control terminal SENSOR3 TS O1 is set to a high level, the second control terminal SENSOR3 TS O2 outputs a high level, and then the third control terminal SENSOR3 TS O3 is set to a low level. The current then flows to the low level through the pull-up resistor R109 and the sampling resistor R107. At this time, the central processing unit module calculates the output voltage value of the pressure sensor by acquiring the data value of the second output terminal SENSOR3 In2.

[0079] It is understandable that a transient voltage suppression diode (TVS) is also installed at the sensor signal input terminal to suppress transient voltage surges.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An integrated power control device for an electric fire pump, connected to a dual-power controller, comprising a central processing unit module, a sensor acquisition circuit, and a first relay output circuit, wherein the central processing unit module is connected to both the sensor acquisition circuit and the first relay output circuit, and the first relay output circuit is connected to the fire pump, characterized in that, It also includes a voltage acquisition module, a current acquisition module, and a second relay output circuit; The voltage acquisition module is used to acquire the voltage value of the AC power supply of the dual power controller; The current acquisition module is used to acquire the current value of the AC power supply of the dual power controller; The second relay output circuit is connected to the dual power controller and is used to control the dual power controller to switch between dual power supplies. The central processing unit module is connected to the voltage acquisition module, the current acquisition module, and the two relay output circuits. It is used to control the operation of the second relay output circuit based on the voltage and current values ​​of the AC power supply, so as to control the dual power supply controller to switch power supplies.

2. The electric fire pump control device with integrated power supply control according to claim 1, characterized in that: The voltage acquisition module includes three voltage acquisition circuits. Each voltage acquisition circuit includes a resistor string consisting of several resistors connected in series, an LC filter, and an RC filter. The connection point between the resistor string and the LC filter is also connected to a reference voltage. The three voltage acquisition circuits are connected to the three phases of a three-phase three-wire AC power supply, and a resistor series is connected in parallel between any two phases.

3. The electric fire pump control device with integrated power supply control according to claim 2, characterized in that: The current acquisition module includes four current acquisition circuits. Each current acquisition circuit includes a current transformer, an LC filter, and an RC filter connected in sequence. The current transformers of the four current acquisition circuits are respectively connected to the three phases and the neutral line of a three-phase three-wire AC power supply.

4. An integrated power supply control device for an electric fire pump according to claim 1, 2, or 3, characterized in that, The sensor signal acquisition module includes: a sensor signal input terminal, a first control branch and a second control branch, a sampling resistor and a third control branch, and also includes a reference voltage. The reference voltage is connected to the sensor signal input terminal in sequence through a first switching transistor, a diode, a first voltage divider resistor and a second voltage divider resistor. The connection point between the second voltage divider resistor and the sensor signal input terminal is grounded through a filter capacitor. The first control branch is connected to the control terminal of the switching transistor, and the second control branch is connected to the connection point of the first voltage divider resistor and the second voltage divider resistor. The connection point of the diode and the first voltage divider resistor is connected in series with the first resistor to serve as the first output terminal, and the connection point of the second voltage divider resistor and the filter capacitor is connected in series with the second resistor to serve as the second output terminal. The sampling resistor is connected in series at the connection point between the sensor signal input terminal and the second output branch; the third control branch is connected to the connection point between the sampling resistor and the second output branch.

5. The electric fire pump control device with integrated power supply control according to claim 4, characterized in that: The first relay output circuit and the second relay output circuit are the same relay switching circuit. The relay switching circuit includes a transistor, a reverse diode, a light-emitting diode, and a relay. The control port of the central processing unit module is connected to the base of the transistor through a resistor voltage divider circuit. The power supply is connected to the collector of the transistor through the reverse diode. The light-emitting diode and the energized coil of the relay are also connected in parallel across the reverse diode. The two sets of contact switches of the relay are respectively connected to a dual power controller or a fire pump.

6. The electric fire pump control device with integrated power supply control according to claim 5, characterized in that: It also includes a data storage module, an indicator module, and a communication module, wherein the data storage module, the indicator module, and the communication module are respectively connected to the central processing unit module.

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