WO2015161625A1

WO2015161625A1 - Electronic lock for power line

Info

Publication number: WO2015161625A1
Application number: PCT/CN2014/087723
Authority: WO
Inventors: 朱林学; 朱子毅
Original assignee: 朱林学; 朱子毅
Priority date: 2014-04-24
Filing date: 2014-09-28
Publication date: 2015-10-29
Also published as: CN203827068U

Abstract

An electronic lock for a power line. The electronic lock comprises a controller and a sensor, wherein the sensor is electrically connected to the controller via a shielded wire. The controller comprises an inner shell and an outer shell, wherein both sides of the inner shell are provided with fasteners, the fasteners are provided with fluorescent spots, and the outer shell is correspondingly provided with fastener holes; the inner shell is provided with a plug-pull wiring female header, and the outer shell is correspondingly provided with an adapted plug-pull wiring pin header and is provided with an external wiring terminal corresponding to the plug-pull wiring pin header in a manner of electric connection. The controller is provided with an external illuminating lamp. The electronic lock for a power line can be used for outdoor high-voltage electrical devices having a rated voltage of 9 to 15 kV, and uses an inductive sensor to conduct contactless measurement, thus being secure and reliable. The controller adopts a plug-pull structure design, and can be replaced without power failure or opening a door, thereby facilitating maintenance.

Description

Electric line electronic lock

Technical field

The utility model belongs to a monitoring device of a power system, in particular to a power line electronic lock.

Background technique

In high-voltage, ultra-high-voltage power systems, it is important to ensure safe production. High-voltage live display devices are often used in various types of switchgear. When the main circuit is equipped with high-voltage power, it outputs a low-voltage voltage signal through the principle of capacitance division, igniting the xenon lamp, and prompting with a light signal. The inductive components of the live display are directly mounted on the mounting panel of the high-voltage equipment. The operating personnel can observe the indicator light to know which section of the main circuit is running. When the components in the cabinet are maintained or tested, the electronic lock device is particularly important.

However, in the design of the existing fully enclosed power station, the detection and control under the charged state are not taken into account in the "five-proof" interface, and it is difficult to install and maintain the live display device under the condition of constant power, so as to reliably prevent The charging misoperation brings certain difficulties. The live display device needs to install the sensor in the busbar in the case of power failure, and needs to re-evacuate and re-calibrate the SF6 inert gas.

The inductive components of the live display are directly mounted on the mounting panel of the high-voltage equipment, and cannot be directly removed. Due to the limited space position during installation and maintenance, it takes a long working time, which is not conducive to the improvement of work efficiency.

Summary of the invention

The technical problem to be solved by the utility model is: designing a power line electronic lock, which is installed and maintained under the condition of constant power and no door opening, and can realize one-way forced locking to the operating mechanism.

The technical solution adopted to solve the above technical problem is to design a power line electronic lock, comprising a controller and a sensor, wherein the sensor is electrically connected to the controller through a shielded wire, and the controller includes an inner casing. And an outer casing, a buckle is arranged on both sides of the inner casing, the buckle is provided with a fluorescent point, the outer casing is correspondingly provided with a card hole, the inner casing is provided with a plug-in type terminal block, and the outer casing is correspondingly arranged and inserted The type of wiring pin, corresponding to the plug-in type of terminal pin electrical connection to set the external terminal, the controller is provided with an external lighting, two bracket mounting holes are respectively arranged on two sides of the outer casing, and the mounting bracket is provided with two L a type of hanging foot, the middle part of which is provided with a screwing screw, the sensor comprises an electric signal amplifying circuit, the controller further comprises a main board, the main board comprises: a display unit, the input end of which is connected with the output end of the sensor for displaying The charged state of the device under test; the latching unit has an input end connected to the output end of the display unit for latching the device under test when the device under test is charged; ; Voltage comparing unit; the PLC program control unit; relay function unit; whistle alarm unit. The inner casing is provided with a single circuit board corresponding to the plug-in type busbar, the outer casing is provided with an integrated circuit board, and the plug-in type wiring pin and the external terminal are disposed on the integrated circuit board, and the inner casing is further The display panel comprises an indicator light, a self-test switch and an external power socket, the indicator light and the self-test switch are electrically connected to the main board, and the external power supply supplies auxiliary power to the controller, and each set of external contacts of the external terminal The normally closed contact of the relay on the main board is connected, and each set of external contacts of the external terminal is respectively connected with the grounding knife auxiliary normally open contact to realize one-way forced locking.

The utility model has the beneficial effects that the utility model relates to a power line electronic lock, which is installed and maintained under the condition of constant power and no door opening, and can realize one-way forced locking to the operating mechanism; using an inductive sensor, non-contact measurement It is safe and reliable, easy to maintain; it is used to prevent accidental entry into the charging interval and prevent electrical misoperation. It can be used for indoor and outdoor high voltage electrical equipment with rated voltage of 9~15kV.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention

2 is a schematic view of the overall structure of the controller of the present invention

Figure 3 is a schematic view of the display panel of the present invention

Figure 4 is a schematic view of the outer surface of the outer casing of the utility model

Figure 5 is a schematic view showing the structure of the card hole and the bracket mounting hole of the present invention

Figure 6 is a schematic view showing the structure of the inner casing and the outer casing of the present invention

Figure 7 is a schematic view of the mounting bracket of the present invention

Figure 8 is a functional block diagram of the controller board of the present invention

Figure 9 is a diagram showing the forced blocking circuit of the present invention

Figure 10 is a single circuit board circuit diagram

In the figure: 1 controller 2 sensor 3 shielded wire 4 hose clamp 5 pole 6 post insulator 7 high voltage busbar 8 display panel 9 inner casing 10 outer casing 11 bracket 12 indicator light 13 electromagnetic lock interface 14 microcomputer five-proof interface 15 working power interface 16 signal line interface 17 shield interface 18 ground end interface 19 bracket mounting hole 20 card hole 21 buckle 22 mounting bracket 23 hanging foot 24 tightening screw 25 grounding knife auxiliary normally open contact 26 relay I phase normally closed contact 27 relay II phase normally closed contact 28 lighting 29 fluorescent point.

detailed description

As shown, a power line electronic lock includes a controller 1 and a sensor 2, wherein the sensor 2 is electrically connected to the controller 1 through a shielded wire 3, the controller 1 including an inner casing 9 and The outer casing 10 is provided with a buckle 21 on both sides of the inner casing 9. The buckle 21 is provided with a fluorescent dot 29, and the outer casing 10 is correspondingly provided with a card hole 20, and the inner casing 9 is provided with a plug-in type terminal block and an outer casing. 10 correspondingly set the plug-in type of terminal block, corresponding to the plug-in type of pin-and-pin connection, the external connection terminal is provided, the controller 1 is provided with an external illumination lamp 28, and two sides of the outer casing 10 are respectively provided with two a bracket mounting hole 19, the mounting bracket 22 is provided with two L-shaped hanging legs 23, a screw screw 24 is disposed through the middle portion thereof, the sensor 2 includes an electric signal amplifying circuit, and the controller 1 further includes a main board, and the main board includes a display unit whose input end is connected to the output end of the sensor 2 for displaying the charged state of the device under test; the latching unit has an input end connected to the output end of the display unit for detecting when the device under test is charged Device latching; operator amplifying unit; voltage Comparing unit; PLC programming control unit; relay function unit; whistle alarm unit, the inner casing 9 is provided with a single circuit board corresponding to the plug-in type busbar, and the outer casing 10 is provided with an integrated circuit board, plug-in wiring The pin header and the external terminal are disposed on the integrated circuit board, and the inner casing 9 further includes a display panel 8. The display panel 8 is provided with an indicator light 12, a self-test switch and an external power jack, the indicator light 12, and the self-test The switch is electrically connected to the main board, and the external power supply supplies auxiliary power to the controller 1. Each set of external contacts of the external connection terminal is connected to the normally closed contact of the relay on the main board, and each set of external contacts of the external connection terminal is separately opened with the grounding knife. The contacts 25 are connected to realize one-way forced locking.

The sensor 2 includes an electric signal amplifying circuit, and the fluctuation value of the actual electric signal is small, the capturing is difficult, and the reaction is slow, and the electric signal amplifying circuit can effectively avoid these drawbacks, especially the arithmetic unit amplifying unit, and the practical application effect is obvious. The control is more precise.

Due to the limitation of the installation position of the device, the space inside the switch cabinet is narrow, especially in the dark night, the controller 1 is externally connected to the illumination lamp 28, the illumination lamp 28 can be powered by the controller 1 power supply, and the illumination lamp 28 is provided with an extended connection cord. To facilitate the movement to ensure that the lighting does not leave a dead end.

Even if the power supply of the controller 1 is insufficient for the illuminating lamp 28 to operate normally, the buckle 21 is provided with the fluorescent dot 29, the repairer can pinch the buckle 21, and remove the controller 1 to take care of it.

During installation, the hanging leg 23 penetrates into the bracket mounting hole 19, pushes the controller 1 inward, and the controller 1 is fastened by the L-shaped structure of the hanging leg 23, and then the tightening screw 24 is tightened and fixed to the switch cabinet by the tightening screw 24. . The sensor 2 should be installed to ensure that the air distance requirements under different voltage levels are met. Preferably, it is installed at the bottom of the corresponding high-voltage line post insulator 6. The supporting hose clamp 4 is used to fasten the pole 5 first, and the sensor 2 is installed in the branch. The controller 5 is connected to the rod 5 through the shielded wire 3 to ensure that the sensor 2 and the high voltage busbar 7 are facing each other, and the non-contact measurement is safe and reliable.

Using the principle of electric field coupling between the sensor 2 and the high-voltage alternating electric field, the inductive and non-contact measurement are performed outside the safety distance, and the sensor 2 generates an induced charge under the action of the alternating electric field to form an induced current as an input signal of the device. After the internal amplification, the induced current signal is transmitted to the controller 1 through the cable. The signal is filtered to effectively remove various high-order harmonic signals. After current/voltage conversion, the power frequency 50Hz voltage signal is output, and then compensated. The operation amplifying unit, after the detection process, enters the voltage comparison unit to perform voltage comparison, and then sends the compared signal to the PLC programming control unit for micro-processing discrimination, and finally outputs the two outputs, one output to the display unit, if the voltage is higher than Set the voltage threshold and judge that there is electricity. The indicator light 12 flashes red. If the voltage is lower than the set voltage threshold, it is judged as no power. The indicator light 12 flashes green, the other way is sent to the relay, and the control relay operates. When it is judged that there is power, the relay does not operate. When it is judged as no power, the normally closed contact of the relay is disconnected, and the normally closed contact of the relay is respectively It is connected with a set of external contacts of the external terminal block to control the blocking, and provides the node function for the microcomputer five defenses.

When the shielded wire 3 connected between the sensor 2 and the controller 1 is disconnected or missed, the corresponding phase indicator light 12 emits a flashing alarm indication, and the controller 1 emits a whistle alarm.

When the device is removed, the hand is extended from the movable door of the instrument door, and the buckles on both sides of the inner casing 9 of the controller 1 are pulled outward, and the buckles are integrated with the buckles 21, and the buckles 21 are forcefully pulled out of the card holes 20, that is, The inner casing 9 can be pulled out, and the plug-in terminal block of the inner casing 9 is also unplugged from the plug-in terminal pin of the outer casing 10, and the inner casing 9 is separated from the outer casing 10, and the outer casing 10 left in the switchgear, the plug-in terminal block is electrically connected to the external terminal, and the controller 1 can be removed without opening and closing the door for maintenance, maintenance or replacement. The controller 1 has been removed from the control mechanism. No need to power off.

The controller 1 is provided with a replaceable and rechargeable standby power source. When the main power source is powered off, it automatically switches to the standby power source; after the main power source is restored, the standby power source is automatically charged; when the main power source and the backup power source are not powered, the controller can pass The external power socket on the display panel 8 selects an external power supply to provide multiple power supply guarantees to ensure the normal operation of the live display device. Press the self-test button to perform a self-test on the software and hardware systems to prevent false indications due to hardware damage and internal faults.

Figure 4 shows the outer end surface of the outer casing 10 of the present invention, K1K2 is used to connect the first electromagnetic lock, K3K4 is used to connect the second electromagnetic lock, K5K6 is used to connect the microcomputer five defense, L+N- is used to connect the working power supply The lower row ports are the signal line interface 16, the shield layer interface 17, and the ground end interface 18, respectively.

Figure 9 shows the grounding knife forcibly blocking circuit. Taking the two-phase busbar test as an example, the controller 1 is provided with a plurality of external contacts, a set of external contacts connected to the relay I phase normally closed contact 26, and the relay II. A set of external contacts connected to the normally closed contact 27 are respectively connected with the grounding blade auxiliary normally open contact 25 to form a forced locking circuit, so that the one-direction forced locking can be realized. If the test has electricity, the I-phase and II-phase relays do not operate, and the grounding knife switch is normally open. If the test is not powered, the I-phase or II-phase relay operates, and the relay I-phase normally closed contact 26 and relay II are normally closed. Point 27 changes from normally closed to disconnected, 25 connected to it The grounding knife assists the normally open contact to close and achieve forced locking. When the system is powered by high voltage, the device can be reliably locked and instructed. When any phase or two phases are de-energized, the charged phase can be accurately indicated, and the locking device will not be unlocked.

It should be noted that the above embodiments are merely preferred embodiments of the present invention. For those skilled in the art, any equivalent or similar replacements are included in the present invention in accordance with the working principle of the present invention. The scope of protection of utility models.

Claims

A power line electronic lock includes a controller and a sensor, wherein the sensor is electrically connected to the controller through a shielded wire, the controller includes an inner casing and an outer casing, and buckles are arranged on both sides of the inner casing. The buckle is provided with a fluorescent dot, the outer casing is correspondingly provided with a card hole, the inner casing is provided with a plug-in type terminal block, and the outer casing is correspondingly provided with a plug-in type terminal pin corresponding to the plug-in type terminal pin. The electric connection is provided with an external connection terminal, the controller is provided with an external illumination lamp, two bracket mounting holes are respectively arranged on two sides of the outer casing body, the installation bracket is provided with two L-shaped hanging feet, and the middle part is provided with a screwing screw The sensor includes an electrical signal amplifying circuit.
The power line electronic lock according to claim 1, wherein the controller further comprises a main board, the main board comprising: a display unit, wherein the input end is connected to the output end of the sensor for displaying the device under test The charging state; the locking unit is connected to the output end of the display unit for latching the device under test when the device under test is charged; the arithmetic amplifying unit; the voltage comparing unit; the PLC programming control unit; the relay function unit; Whistle alarm unit.
The power line electronic lock according to claim 1, wherein the inner casing is provided with a single circuit board corresponding to the plug-in type busbar, and the outer casing is provided with an integrated circuit board, and the plug-in terminal block The pins and external terminals are placed on the integrated circuit board.
1 . The power line electronic lock according to claim 1 , wherein the inner casing further comprises a display panel, wherein the display panel is provided with an indicator light, a self-test switch and an external power jack, and the indicator light and the self-test. The switch is electrically connected to the main board, and the external power supply supplies auxiliary power to the controller.
The power line electronic lock according to claim 1, wherein each set of external contacts of the external terminal is connected to a normally closed contact of a relay on the main board, and each set of external contacts of the external terminal is respectively connected with a grounding knife Auxiliary normally open contact connection for one-way forced locking.