Protection device and method for disassembled electric energy meter sorting device

Abstract

The invention relates to the technical field of electric energy meter dismounting and sorting, and discloses a dismounted electric energy meter sorting device protection device and method, and the device comprises a power module, a detection circuit module, a relay drive module, a processing module and an alarm module; the current open-circuit detection module is used for detecting a current open-circuit condition, the voltage short-circuit detection module is used for detecting a voltage short-circuit condition, the current transformer is used for sensing a current of a power line and transmitting a current signal to the processing module, the magnetic latching relay is used for controlling the current open-circuit detection module, and the intermediate relay is used for controlling the voltage short-circuit detection module; the processing module is used for receiving the signal to control the relay driving module, and the processing module is used for outputting a fault signal and controlling the alarm module. The protection device automatically detects the current loop or the voltage loop of the faulted electric energy meter, when an electrical loop fault exists, the faulted electric energy meter is separated out of a test loop, normal testing of other electric energy meters is not affected, and the sorting efficiency of the disassembled electric energy meters is greatly improved.

Description

Technical Field

[0001] This invention patent relates to the technical field of the protection for the sorting of retrieved electricity meters. Specifically, it relates to a protection device and method for the sorting device of retrieved electricity meters. Background Art

[0002] As the first-generation smart electricity meters of the State Grid Corporation have reached the replacement cycle, the number of retrieved electricity meters has been increasing year by year. The retrieved electricity meters need to be sorted and detected to facilitate the judgment of faulty meter positions and fault points.

[0003] Currently, in order to efficiently complete the sorting of electricity meters and reduce the pressure on the warehouse, and avoid wasting effective storage capacity resources, an intelligent sorting system is used to sort and detect the retrieved meters. For example, the prior patent with the authorization announcement number CN208050404U discloses a sorting device and an intelligent sorting system for retrieved electricity meters, including a detection platform, a conveying platform, a marking platform, a sorting platform, and a control system. The detection platform is used to detect the retrieved electricity meters, generate detection information and transmit it to the control system so that the control system generates sorting information. The conveying platform is used to convey the detected retrieved electricity meters to the marking platform so that the marking platform marks the retrieved electricity meters according to the corresponding sorting information of the retrieved electricity meters. The sorting platform is used to sort the marked retrieved electricity meters according to the sorting information.

[0004] In the prior art, when powering on and testing the retrieved electricity meters, electrical circuit fault problems such as open current circuits and short-circuited voltage circuits are likely to occur. During the simultaneous testing of multiple meter positions, it is easy to have situations where current cannot be loaded, voltage overload occurs, and it is impossible to determine the faulty meter positions and fault points, and manual checking one by one is required, which greatly affects the sorting efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a protection device and method for the sorting device of retrieved electricity meters, aiming to solve the problem in the prior art that the faulty meter positions and fault points of the retrieved electricity meters cannot be determined, which affects the low sorting efficiency.

[0006] The present invention is implemented as follows. A protection device for a disassembled electricity meter sorting device includes a power supply module, a detection circuit module, a relay drive module, a processing module, and an alarm module. The power supply module is used to supply power, and the detection circuit module, the relay drive module, the processing module, and the alarm module are respectively arranged in communication with the power supply module. The detection circuit module includes a current open-circuit detection module and a voltage short-circuit detection module. The current open-circuit detection module is used to detect the current open-circuit condition of the power line, and the voltage short-circuit detection module is used to detect the voltage short-circuit condition of the power line. The voltage short-circuit detection module includes a plurality of current transformers, and the current transformers are used to sense the current of the power line and transmit the current signal to the processing module. The relay drive module is used to drive a magnetic latching relay or an intermediate relay. The magnetic latching relay is used to control the current open-circuit detection module to be in a closed state or an open state, and the intermediate relay is used to control the voltage short-circuit detection module to be in a closed state or an open state. The processing module is used to receive signals to control the relay drive module, and the processing module is used to output fault signals and control the alarm module.

[0007] Further, the current open-circuit detection module includes an optocoupler, and the optocoupler is used to output a level signal. When the current is open-circuited, the optocoupler outputs an isolated level signal. When the current is not open-circuited, the optocoupler outputs a conducting level signal.

[0008] Further, the current open-circuit detection module includes a first Port port, a second Port port, and four rectifier bridges. The four rectifier bridges are arranged in parallel correspondence, and each rectifier bridge includes a plurality of the optocouplers. The first Port port accesses the current, passes through two of the rectifier bridges, and then the current flows out through the second Port port. Alternatively, the second Port port accesses the current, passes through two of the rectifier bridges, and then the current flows out through the first Port port.

[0009] Further, the current open-circuit detection module includes diode D28 and diode D32. Diode D28 forms a loop with the first Port port, and diode D32 forms a loop with the second Port port.

[0010] Further, each of the current transformers corresponds to the A phase, B phase, and C phase of the electricity meter respectively. The current transformer has a P port and an N port, and the P port and the N port are used for wiring. The voltage short-circuit detection module includes an operational amplifier, and the operational amplifier is in conduction with the P port and the N port. The operational amplifier is used to receive and process the level signal, and the operational amplifier is used to output an I1 level signal. Based on the I1 level signal, it is determined whether there is a voltage short circuit.

[0011] Further, the relay driving module includes a magnetic latching relay driving module for driving a magnetic latching relay; the magnetic latching relay driving module includes an Input interface, an Output interface and two triodes. The Input interface is controlled by the processing module, and the amplification characteristics of the two triodes are used to drive the magnetic latching relay. The Output interface is used to make the magnetic latching relay in a closed state or an open state; the magnetic latching relay is used to close or open the circuit from the live wire of the watt-hour meter to the current transformer.

[0012] Further, the relay driving module includes an intermediate relay driving module for driving an intermediate relay; the intermediate relay driving module includes an Input interface, an Output interface and a triode. The Input interface is controlled by the processing module, and the amplification characteristics of the triode are used to drive the intermediate relay. The Output interface is used to make the intermediate relay in a closed state or an open state; the intermediate relay is used to close or open the circuit from the live wire of the watt-hour meter to the current transformer.

[0013] Further, the processing module is used to process voltage short - circuit signals, current open - circuit signals, reset signals and set signals into relay switch signals, fault signal outputs and buzzer alarms.

[0014] Further, when the current open - circuit signal is valid, the processing module outputs a signal to keep the relay closed; when the voltage short - circuit signal is valid, the processing module outputs a control signal for the control relay; when both the open - circuit signal and the short - circuit signal appear, the processing module outputs a mixed fault signal to the mixed fault interface.

[0015] The protection device of the retrieved watt - hour meter sorting device includes a reset input interface and a set input interface, which are respectively arranged in conduction with the processing module; the reset input interface and the set input interface are respectively used to output a control relay signal and a signal to keep the relay open.

[0016] The protection method for the retrieved watt - hour meter sorting device includes a power supply module, a detection circuit module, a relay driving module, a processing module, an alarm module and a software platform; the specific sorting protection steps are as follows: (1) Before testing the retrieved watt - hour meter, detect whether there is a voltage short - circuit or a current open - circuit in the retrieved watt - hour meter through the detection circuit module; (2) When there is a voltage short circuit or current open circuit in the measured and retrieved electricity meter, the relay driving module triggers a driving instruction to control the corresponding magnetic latching relay and intermediate relay to act, isolating the test circuit of the measured electricity meter. (3) The processing module outputs fault information and reports it to the software platform.

[0017] Compared with the prior art, the protection device and method for the retrieved electricity meter sorting device provided by the present invention can perform power-on tests on multiple retrieved electricity meters at one time by adding an independent protection device to each measured and retrieved electricity meter, realizing automatic detection of the current circuit or voltage circuit of the faulty electricity meter. When it is found that there is an electrical circuit fault in the measured electricity meter, automatic protection is realized, and the faulty electricity meter is isolated from the test circuit without affecting the normal test of other electricity meters, greatly improving the sorting efficiency of the retrieved electricity meters. Moreover, the fault information is reported by means of sound, light, and fault codes. Description of the Drawings

[0018] Figure 1 is the architecture diagram of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 2 is the schematic diagram of the power supply circuit of the power supply module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 3 is the schematic diagram of the power supply circuit of the power supply module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 4 is the schematic diagram of the principle of the current open circuit detection module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 5 is the schematic diagram of the principle of the voltage short circuit detection module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 6 is the schematic diagram of the principle of the voltage short circuit detection module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 7 is the schematic diagram of the driving principle of the magnetic latching relay driving module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 8 is the schematic diagram of the driving principle of the intermediate relay driving module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 9 is the schematic diagram of the principle of the processing module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 10 is the schematic diagram of the principle of the processing module of the protection device for the retrieved electricity meter sorting device provided by the present invention; Figure 11It is a schematic diagram of the principle of the processing module of the protection device for the disassembled and returned electricity meter sorting device provided by the present invention; Figure 12 It is a topology diagram of the current loop protection of the protection device for the disassembled and returned electricity meter sorting device provided by the present invention; Figure 13 It is a topology diagram of the voltage loop protection of the protection device for the disassembled and returned electricity meter sorting device provided by the present invention. Specific embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] Referring to the figure shown, it is a preferred embodiment provided by the present invention.

[0023] The protection device for the disassembled and returned electricity meter sorting device includes a power supply module, a detection circuit module, a relay drive module, a processing module and an alarm module. The power supply module is used to supply power, and the detection circuit module, the relay drive module, the processing module and the alarm module are respectively arranged in communication with the power supply module; the detection circuit module includes a current open circuit detection module and a voltage short circuit detection module. The current open circuit detection module is used to detect the current open circuit situation of the power supply line, and the voltage short circuit detection module is used to detect the voltage short circuit situation of the power supply line. The voltage short circuit detection module includes a plurality of current transformers, and the current transformers are used to sense the current of the power supply line and transmit the current signal to the processing module. The relay drive module is used to drive a magnetic latching relay or an intermediate relay. The magnetic latching relay is used to control the current open circuit detection module to be in a closed state or an open state, and the intermediate relay is used to control the voltage short circuit detection module to be in a closed state or an open state; the processing module is used to receive signals to control the relay drive module, and the processing module is used for fault signal output and control of the alarm module.

[0024] The above-mentioned sorting device protection device for returned electricity meters can perform power-on tests on multiple returned electricity meters at one time by adding independent protection devices to each measured returned electricity meter, automatically detect the current loop or voltage loop of the faulty electricity meter, and when an electrical loop fault is found in the measured electricity meter, automatically protect it, isolate the faulty electricity meter from the test loop, without affecting the normal tests of other electricity meters, greatly improving the sorting efficiency of returned electricity meters. Moreover, the fault information is reported through methods such as sound, light, and fault codes.

[0025] The power supply module is powered by an external 24V power supply. The board uses TPS54331DR and CJ7805 chips to convert 24V into 5V for powering other circuits.

[0026] The current open circuit detection module includes an optocoupler, which is used to output a level signal; when the current is open, the optocoupler outputs an isolated level signal, and when the current is not open, the optocoupler outputs a conducting level signal.

[0027] The current open circuit detection module includes a first Port port, a second Port port, and four rectifier bridges. The four rectifier bridges are arranged in parallel correspondence. The rectifier bridge includes multiple optocouplers; the first Port port accesses the current, passes through two of the rectifier bridges, and then flows out of the current through the second Port port, or the second Port port accesses the current, passes through two of the rectifier bridges, and then flows out of the current through the first Port port.

[0028] The current open circuit detection module includes diode D28 and diode D32. Diode D28 forms a loop with the first Port port, and diode D32 forms a loop with the second Port port.

[0029] If the current is open, the optocoupler outputs an isolated level signal. If it is not open, the optocoupler outputs the opposite level signal.

[0030] Connect a group of power supply lines to the first Port port and the second Port port. There are 4 rectifier bridges in the circuit. Whether the current flows in from the first Port port or the second Port port, it can pass through 2 of the rectifier bridges and reach the other port to flow out the current; according to the characteristics of the diode, diodes D28 and D32 play a rectifying role to ensure that when there is current in the power supply line, the light-emitting diode of the optocoupler can emit a signal. The other end of the optocoupler outputs an isolated electrical signal.

[0031] Each current transformer corresponds to the A phase, B phase, and C phase of the watt-hour meter respectively. The current transformer has a P port and an N port, and the P port and the N port are used for wiring. The voltage short-circuit detection module includes an operational amplifier, which is connected to the P port and the N port, and is used to receive and process the level signal, and is also used to output the I1 level signal to determine whether there is a voltage short circuit based on the I1 level signal.

[0032] The current transformer senses the current of the power line. After being processed by the current signal processing circuit, it outputs a level signal indicating whether a fault occurs.

[0033] The P port is A_SC_C_P, and the N port is A_SC_C_N. A_SC_C_P and A_SC_C_N are the wirings of the current transformer. After being processed by the operational amplifier, the I1 level signal is output.

[0034] The processing of the B phase and C phase is similar to that of the A phase.

[0035] The relay driving module includes a magnetic latching relay driving module, which is used to drive the magnetic latching relay. The magnetic latching relay driving module includes an Input interface, an Output interface, and two triodes. The Input interface is controlled by the processing module, and the two triodes' amplification characteristics are used to drive the magnetic latching relay. The Output interface is used to make the magnetic latching relay in a closed state or an open state. The magnetic latching relay is used to close or open the circuit from the live wire of the watt-hour meter to the current transformer.

[0036] The relay driving module includes an intermediate relay driving module, which is used to drive the intermediate relay. The intermediate relay driving module includes an Input interface, an Output interface, and a triode. The Input interface is controlled by the processing module, and the triode's amplification characteristics are used to drive the intermediate relay. The Output interface is used to make the intermediate relay in a closed state or an open state. The intermediate relay is used to close or open the circuit from the live wire of the watt-hour meter to the current transformer.

[0037] The two triodes' amplification characteristics are used to drive the magnetic latching relay. The Output interface makes the magnetic latching relay reach the closed or open effect, and the magnetic latching relay closes or opens the circuit from the power line to the current open-circuit detection.

[0038] One triode is used to drive the intermediate relay, and the intermediate relay disconnects or closes the circuit from the meter's live wire to the current transformer.

[0039] The processing module is used to process the voltage short-circuit signal, current open-circuit signal, reset signal, and set signal into relay switch signals, fault signals for output, and buzzer alarms.

[0040] When the current open - circuit signal is valid, the processing module outputs a signal to keep the relay closed; when the voltage short - circuit signal is valid, the processing module outputs a control signal for the control relay; when both the open - circuit signal and the short - circuit signal appear simultaneously, the processing module outputs a mixed - fault signal to the mixed - fault interface; when only the short - circuit signal appears, the processing module outputs a normal - fault signal to the normal - fault interface.

[0041] The protection device of the retrieved electricity meter sorting device includes a reset input interface and a set input interface, and the reset input interface and the set input interface are respectively arranged in conduction with the processing module; the reset input interface and the set input interface are respectively used to output a control relay signal and a signal to keep the relay open.

[0042] The reset input interface and the set input interface are respectively processed by opto - isolator signal isolation and then connected to the circuit of the processing module.

[0043] The protection method of the retrieved electricity meter sorting device includes a power supply module, a detection circuit module, a relay drive module, a processing module, an alarm module, and a software platform; the specific sorting protection steps are as follows: (1) Before testing the retrieved electricity meter, use the detection circuit module to detect whether there is voltage short - circuit or current open - circuit in the retrieved electricity meter; (2) When there is a voltage short - circuit or current open - circuit in the measured retrieved electricity meter, the relay drive module triggers a drive instruction to control the corresponding magnetic - holding relay and intermediate relay to act, and isolate the test circuit of the measured electricity meter; (3) The processing module outputs fault information and reports it to the software platform In the above - mentioned protection method of the retrieved electricity meter sorting device, when the protection device detects that there is a voltage short - circuit or current open - circuit in the measured retrieved meter, it will automatically trigger protection, control the corresponding magnetic - holding relay and intermediate relay to act; isolate the faulty electricity meter from this test circuit, and report the fault information to the software platform.

[0044] At the same time, the software platform can also manually isolate the required electricity meters by sending an isolation instruction to the protection device.

[0045] Since the protection instruction of the fault - action relay is automatically executed by the pure hardware of the protection device, it reduces the situation of communication interaction and communication - fault delay, can start protection in milliseconds, and the protection response time is better than that of the protection time of the detection system power source, achieving the purpose of not affecting the normal execution of detection.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Remove the protection device of the electric energy meter sorting device, which is characterized by: The invention comprises a power module, a detection circuit module, a relay drive module, a processing module and an alarm module, wherein the power module is used for supplying power, and the detection circuit module, the relay drive module, the processing module and the alarm module are respectively arranged in communication with the power module; the detection circuit module comprises a current open circuit detection module and a voltage short circuit detection module, wherein the current open circuit detection module is used for detecting the current open circuit of the power line, and the voltage short circuit detection module is used for detecting the voltage short circuit of the power line, and the voltage short circuit detection module comprises a plurality of current transformers, wherein the current transformers are used for sensing the current of the power line and transmitting the current signal to the processing module, the relay drive module is used for driving a magnetic latching relay or an intermediate relay, wherein the magnetic latching relay is used for controlling the current open circuit detection module to be in a closed state or an open state, and the intermediate relay is used for controlling the voltage short circuit detection module to be in a closed state or an open state; the processing module is used for receiving a signal to control the relay drive module, and the processing module is used for outputting a fault signal and controlling the alarm module.

2. The protective device for dismantling and sorting the electric energy meter according to claim 1, characterized in that: The current open circuit detection module includes a photoelectric coupler, and the photoelectric coupler is used to output a level signal; When the current is open-circuited, the photocoupler outputs an isolated level signal, and when the current is not open-circuited, the photocoupler outputs a conductive level signal.

3. The protective device for dismantling and sorting the electric energy meter according to claim 2, characterized in that: The current open circuit detection module includes a first Port, a second Port and four rectifier bridges, the four rectifier bridges are arranged in parallel, and the rectifier bridges include a plurality of photoelectric couplers; the first Port receives current, passes through two of the rectifier bridges, and then flows out through the second Port, or the second Port receives current, passes through two of the rectifier bridges, and then flows out through the first Port.

4. The protective device for dismantling and sorting the electric energy meter according to claim 3, characterized in that: The current open circuit detection module includes a diode D28 and a diode D32. The diode D28 forms a loop with the first Port, and the diode D32 forms a loop with the second Port.

5. The protective device for dismantled electric energy meter sorting device according to any one of claims 1 to 4, characterized in that: Each of the current transformers corresponds to phase A, phase B and phase C of the electric energy meter respectively, and the current transformer has a P port and an N port, and the P port and the N port are used for wiring; the voltage short circuit detection module includes an operational amplifier, and the operational amplifier is connected to the P port and the N port. The operational amplifier is used to receive and process level signals, and the operational amplifier is used to output an I1 level signal, and whether there is a voltage short circuit is determined based on the I1 level signal.

6. The protective device for dismantled electric energy meter sorting device according to any one of claims 1 to 4, characterized in that: The relay drive module includes a magnetic latching relay drive module, which is used to drive the magnetic latching relay; the magnetic latching relay drive module includes an input interface, an output interface and two transistors, the input interface is controlled by the processing module, and the amplification characteristics of the two transistors are used to drive the magnetic latching relay, and the output interface is used to realize that the magnetic latching relay is in a closed state or an open state; the magnetic latching relay is used to close or open the circuit from the live wire of the electric energy meter to the current transformer.

7. The protective device for dismantled electric energy meter sorting device according to any one of claims 1 to 4, characterized in that: The relay drive module includes an intermediate relay drive module, which is used to drive the intermediate relay; the intermediate relay drive module includes an input interface, an output interface and a transistor, the input interface is controlled by the processing module, and the amplification characteristics of the transistor are used to drive the intermediate relay, and the output interface is used to realize that the intermediate relay is in a closed state or an open state; the intermediate relay is used to close or open the circuit from the live wire of the electric energy meter to the current transformer.

8. The protective device for dismantled electric energy meter sorting device according to any one of claims 1 to 4, characterized in that: The processing module is used to process the voltage short-circuit signal, the current open-circuit signal, the reset signal and the set signal into a relay switch signal, a fault signal output and a buzzer alarm.

9. The protective device for dismantling and sorting the electric energy meter according to claim 8, characterized in that: When the current open circuit signal is valid, the processing module outputs a signal to keep the relay closed; when the voltage short circuit signal is valid, the processing module outputs a control signal to control the relay; when the open circuit signal and the short circuit signal appear at the same time, the processing module outputs a mixed fault signal to the mixed fault interface; The protection device for the disassembled electric energy meter sorting device includes a reset input interface and a set input interface, and the reset input interface and the set input interface are respectively arranged to be conductive with the processing module; the reset input interface and the set input interface are respectively used to output a control relay signal and a signal to keep the relay turned on.

10. A method for protecting a disassembled electric energy meter sorting device, characterized in that: It includes power module, detection circuit module, relay drive module, processing module, alarm module and software platform; the specific sorting and protection steps are as follows: (1) Before testing the disassembled electric energy meter, the detection circuit module is used to detect whether there is a voltage short circuit or a current open circuit in the disassembled electric energy meter; (2) When the disassembled electric energy meter under test has a voltage short circuit or a current open circuit, the relay drive module triggers a drive instruction to control the corresponding magnetic latching relay and the intermediate relay to operate, thereby isolating the test circuit of the electric energy meter under test; (3) The processing module outputs the fault information and reports it to the software platform.

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