CN111983396A - Electric high-voltage test area safety protection system - Google Patents
Electric high-voltage test area safety protection system Download PDFInfo
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- CN111983396A CN111983396A CN202010688333.3A CN202010688333A CN111983396A CN 111983396 A CN111983396 A CN 111983396A CN 202010688333 A CN202010688333 A CN 202010688333A CN 111983396 A CN111983396 A CN 111983396A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to an electric high-voltage test area safety protection system, which comprises a control device arranged between a tester and a power supply, a first detection device arranged at the inlet of a first test area, communicated with the control device, and used for executing instruction work according to an instruction signal and sending a locking signal of the first test area, a second detection device arranged at the inlet of a second test area, communicated with the control device, and used for executing instruction work according to the instruction signal and sending a locking signal of the second test area, and a third detection device arranged outside the first test area, used for detecting the state of a grounding wire of a high-voltage wire in the first test area and sending the grounding signal to the control device. According to the invention, after the first test area and the second test area are ensured to be safe, a tester can enter the test areas, so that electric shock of the tester is avoided; when the state of the grounding wire has a problem, the door lock in the test area cannot be unlocked, so that the personal safety is protected; the test instrument is protected, and the time is saved. The remote area protection is provided, and the safety of testing personnel is effectively protected for large-scale equipment to be tested.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a safety protection system for an electric high-voltage test area.
Background
In the field of electric power such as electric power systems and power plants, high-voltage electrical tests (1KV or more) of equipment are widely performed. Once the worker carelessly contacts the high-voltage electricity, casualties are easily caused. Therefore, before work, the test area must be set with a red and white warning tape to prohibit entry of extraneous personnel. After the test wiring is completed, the high-voltage test generator can be electrified after the test area is complete and no person is in the equipment. The test area consisting of the existing red and white warning tape has the following danger points in the following steps:
1. the test responsible person easily forgets that the discharge or grounding operation causes electric shock: in the test process, when a test responsible person needs to enter a test area to perform work such as wire replacement, wire disconnection and the like, a power supply of a test instrument needs to be disconnected, high-voltage test equipment in the test area is discharged to 0V, and then the operation can be performed after the high-voltage test equipment is connected with a ground wire. Once one of the steps is forgotten, people are easily shocked.
2. If the ground wire is not firmly grounded or has poor contact, people are easily shocked: the ground wire is clamped in a high-voltage loop to protect personal safety, but if the ground wire is disconnected, the grounding is not firm or the contact is poor, people are easy to get an electric shock.
3. The test is started again after the wire is changed, the ground wire is easy to forget to be taken down, and short circuit and over-current burning insurance are easy to cause when the high-voltage test generator is electrified for testing.
4. Sometimes the place of line change is located on another floor or a remote location. When a tester works in a remote place, other people electrify the tester, and the tester is easily subjected to electric shock.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a safety protection system for an electrical high voltage test area, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing an electrical high voltage test area safety protection system comprising: a control device, a first detection device, a second detection device, and a third detection device;
the control device is arranged between the tester and the power supply, the first detection device is arranged at the inlet of the first test area, the second detection device is arranged at the inlet of the second test area, and the third detection device is arranged outside the first test area;
the first detection device is in communication connection with the control device and is used for executing instruction work according to the instruction signal sent by the control device and sending a locking signal of the first test area to the control device;
the second detection device is in communication connection with the control device and is used for executing instruction work according to the instruction signal sent by the control device and sending a locking signal of the second test area to the control device;
the third detection device is in communication connection with the control device and is used for detecting the state of a grounding wire of the high-voltage wire in the first test area and sending a grounding signal to the control device;
the control device is used for detecting the grounding state of the grounding wire according to the grounding signal and sending an indication signal to the first detection device and the second detection device according to the grounding state and the on-off state of the power supply.
Preferably, the first detection means comprises: a first electromagnetic lock; the first test zone comprises: a first retractable door;
the first electromagnetic lock is arranged at an inlet of the first test area and is connected with the first telescopic door;
the first electromagnetic lock is used for detecting the opening/closing state of the first retractable door and sending a locking signal of the first retractable door to the control device when the first retractable door is closed; and the number of the first and second groups,
the ground wire switch-on indicating device is used for executing ground wire switch-on indicating work according to an indicating signal sent by the control device; and/or, the power supply connection indicating work is executed according to the indicating signal sent by the control device; and/or performing an indicating operation that the first test area is operable according to an indicating signal sent by the control device.
Preferably, the first detection device further comprises: a first wireless communication module;
the first wireless communication module is in communication connection with the control device, so that the first detection device can communicate with the control device.
Preferably, the second detecting means includes: a second electromagnetic lock; the second test zone comprises: a second retractable door;
the second electromagnetic lock is arranged at an inlet of the second test area and is connected with the second telescopic door;
the second electromagnetic lock is used for detecting the opening/closing state of the second retractable door and sending a locking signal of the second retractable door to the control device when the second retractable door is closed; and the number of the first and second groups,
the ground wire switch-on indicating device is used for executing ground wire switch-on indicating work according to an indicating signal sent by the control device; and/or, the power supply connection indicating work is executed according to the indicating signal sent by the control device; and/or performing an indicating operation that the second test area is operable according to an indicating signal transmitted by the control device.
Preferably, the second detecting device further comprises: a second wireless communication module;
the second wireless communication module is in communication connection with the control device, so that the second detection device can communicate with the control device.
Preferably, the third detecting means includes: the monitoring device is in communication connection with the control device;
the monitoring device is used for detecting the state of a grounding wire of the high-voltage wire in the first test area and sending the grounding signal to the control device.
Preferably, the third detecting device further comprises: the device comprises a first clamping device, a second clamping device which is rotatably connected with the first clamping device and is insulated, and a switch device arranged on the second clamping device;
the first end of the monitoring device is connected with the first clamping device, the second end of the monitoring device is connected with the switching device, and the third end of the monitoring device is grounded and the second clamping device is grounded;
when the first clamping device and the second clamping device are clamped on a high-voltage wire, if the first clamping device and the second clamping device are stably clamped on the high-voltage wire and a grounding wire is conducted, the monitoring device outputs a first indicating signal; and if the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the monitoring device outputs a second indicating signal.
Preferably, the third detecting device further comprises: and the insulating rotating shaft is respectively connected with the first clamping device and the second clamping device so that the first clamping device and the second clamping device can be rotatably connected and insulated.
Preferably, the first clamping device comprises: a grounding clip; the second clamping device includes: a test clip;
the ground clip includes: a first clamping part and a first connecting part;
the test clip includes: a second clamping portion and a second connecting portion;
the first connecting part is connected with a first end of the monitoring device, the second connecting part is grounded, and the switching device is arranged on the second clamping part; when the first clamping part of the grounding clamp and the second clamping part of the testing clamp the high-voltage wire, the switch device is closed, and the monitoring device is started.
Preferably, the monitoring device comprises: the monitoring device comprises a monitoring device body, a power supply device, a current detection circuit, a first indicating circuit and a second indicating circuit, wherein the power supply device, the current detection circuit, the first indicating circuit and the second indicating circuit are arranged on the monitoring device body;
the first end of the power supply device is connected with the first end of the switch device, the second end of the switch device is connected with the first end of the current detection circuit, and the second end of the current detection circuit is connected with the second end of the power supply device;
the first end of the first indicating circuit is connected with the first end of the current detecting circuit, and the second end of the first indicating circuit is connected with the second end of the current detecting circuit;
the first end of the second indicating circuit is connected with the first end of the current detecting circuit, and the second end of the second indicating circuit is connected with the second end of the current detecting circuit;
when the first clamping device and the second clamping device are stably clamped on the high-voltage wire and the grounding wire is conducted, the switch device is closed, the current detection circuit works, and the first indicating circuit is conducted and outputs the first indicating signal;
the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the current detection circuit does not work, and the second indicating circuit is conducted and outputs the second indicating signal.
Preferably, the current detection circuit includes: a current limiting circuit and a current detection relay;
the current detection relay includes: a current detection unit;
the first end of the current limiting circuit is used as the first end of the current detection circuit to be connected with the second end of the switch device, the second end of the current limiting circuit is connected with the second clamping device, the first end of the current detection part is connected with the first clamping device, and the second end of the current detection part is used as the second end of the current detection circuit to be connected with the second end of the power supply device.
Preferably, the current detection relay includes: a first switch; the first indication circuit includes: a first indicator light;
a first end of the first switch is connected with a first end of the current-limiting current, a second end of the first switch is connected with a first end of the first indicator light, and a second end of the first indicator light is connected with a second end of the current detection part;
when the first clamping device and the second clamping device are stably clamped on the high-voltage wire and the grounding wire is conducted, the switch device is closed, the current detection portion controls the first switch to be closed, and the first indicator lamp generates the first indicator signal.
Preferably, the current detection relay includes: a second switch; the second indicating circuit includes: a second indicator light;
a first end of the second switch is connected with a first end of the current-limiting current, a second end of the second switch is connected with a first end of the second indicator light, and a second end of the second indicator light is connected with a second end of the current detection part;
when the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the switch device is closed, the current detection part controls the second switch to be closed, and the second indicator lamp generates the second indicator signal.
Preferably, the second indicating circuit further comprises: an alarm;
the alarm is connected with the second indicator light in parallel;
when the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the switch device is closed, the current detection part controls the second switch to be closed, and the alarm works and outputs an alarm signal.
Preferably, the third detecting device further comprises: a third wireless communication module;
the third wireless communication module is in communication connection with the control device, so that the third detection device can communicate with the control device.
Preferably, the control device includes: the power supply module, the interface module connected with the power supply and the controller;
the power supply module is connected with the interface module and the controller and used for supplying power to the interface module and the controller;
the interface module is respectively connected with the controller and the power supply and is used for switching on and switching off the power supply according to the control of the controller;
the controller is used for detecting the grounding state of the grounding wire according to the grounding signal sent by the third detection device and controlling the power supply to be switched on or off according to the grounding state; and sending an indication signal to the first detection device and the second detection device according to the on-off state of the power supply.
Preferably, the control device further includes: a fourth wireless communication module connected with the controller;
the fourth wireless communication module is in communication connection with the first detection device, the second detection device and the third detection device, so that the control device can communicate with the first detection device, the second detection device and the third detection device.
Preferably, the control device further includes: a display module connected with the controller;
the display module is used for displaying the grounding state of the grounding wire, the working state of the first test area, the working state of the second test area and the on-off state of the power supply.
The safety protection system for the electric high-voltage test area has the following beneficial effects: the device comprises a control device arranged between a tester and a power supply, a first detection device arranged at an inlet of a first test area, a second detection device arranged at an inlet of a second test area, a third detection device and a third detection device, wherein the first detection device is in communication connection with the control device and performs indication work according to an indication signal and sends a locking signal of the first test area, the second detection device is in communication connection with the control device and performs indication work according to the indication signal and sends a locking signal of the second test area, and the third detection device is arranged outside the first test area, detects the state of a grounding wire of a high-voltage wire in the first test area and sends the grounding signal to the control device. According to the invention, after the first test area and the second test area are ensured to be safe, a tester can enter the test areas, so that electric shock of the tester is avoided; when the state of the grounding wire has a problem, the door lock in the test area cannot be unlocked, so that the personal safety is protected; the test instrument is protected, and the time is saved. The remote area protection is provided, and the safety of testing personnel is effectively protected for large-scale equipment to be tested.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an electrical high-voltage test area safety protection system provided by an embodiment of the invention;
fig. 2 is a schematic communication diagram of a first detection device, a second detection device, a third detection device and a control device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third detecting device according to an embodiment of the present invention;
FIG. 4 is a schematic front view of a first clamping device and a second clamping device connected together according to an embodiment of the present invention;
FIG. 5 is a schematic side view of an embodiment of the present invention providing a connection between a first clamping device and a second clamping device;
fig. 6 is a schematic circuit diagram of a third detecting device according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The invention provides a safety protection system for an electric high-voltage test area, which aims to solve the problems that a tester is easy to get an electric shock in the current test area, a short circuit and overcurrent burning insurance are easy to cause in a power-on test of a high-voltage test generator, and the electric shock of the tester working in a remote place is caused by misoperation due to the fact that an operator is unclear on the remote place working environment. This can guarantee that test personnel must accomplish outage, discharge and hang test area's behind the ground wire door just can the unblock in the test process, and test personnel just can get into test area, can effectively avoid test personnel to electrocute. When the ground wire monitoring loop monitors the problems of ground wire disconnection, weak ground or poor contact and the like, a door in a test area cannot be unlocked, so that a tester cannot enter the test area under the conditions, and personal safety can be protected. In addition, if the ground wire is forgotten to be taken down after the wire is replaced, the power supply cannot be electrified, the test instrument can be protected, and the time is saved. And the device also has remote regional protection, and can effectively protect the safety of testers for large-scale equipment to be tested.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an alternative embodiment of the embodiments of the present invention.
Specifically, as shown in fig. 1, the safety protection system for the electrical high-voltage test area includes: a control device 40, a first detection device 10, a second detection device 20, and a third detection device 30.
Wherein the control device 40 is disposed between the tester and the power source 70, the first detecting device 10 is disposed at the entrance of the first testing area 100, the second detecting device 20 is disposed at the entrance of the second testing area 200, and the third detecting device 30 is disposed outside the first testing area 100. In some embodiments, the second test area 200 may be a separate area from the first test area 100, or the second test area 200 may be an area that is not at the same location as the first test area 100 and is not visible, such as the second test area 200 being at the same floor or a remote location from the first test area 100.
In some embodiments, the first detecting device 10 is communicatively connected to the control device 40, and is configured to perform an instruction operation according to the instruction signal sent by the control device 40 and send a locking signal of the first test area 100 to the control device 40.
Further, in some embodiments, the first detection device 10 includes: a first electromagnetic lock; the first test zone 100 comprises: a first retractable door 50. The first electromagnetic lock is disposed at an entrance of the first test area 100 and is connected to the first retractable door 50.
The first electromagnetic lock is configured to detect an open/close state of the first retractable door 50, and send a locking signal of the first retractable door 50 to the control device 40 when the first retractable door 50 is closed; and is used for carrying out the work of indicating the connection of the grounding wire according to the indicating signal sent by the control device 40; and/or, according to the indication signal sent by the control device 40, the power supply 70 is switched on to indicate the work; and/or perform an indication that the first test area 100 is operational based on an indication signal sent by the control device 40.
In some embodiments, the first electromagnetic lock may include at least one LED light and an audible cue module. The at least one LED lamp and the audible prompt module can be used for executing corresponding indication work. For example, in some embodiments, the first electromagnetic lock may include a green LED light, a red LED light, and a yellow LED light. When the first electromagnetic lock receives a grounding signal of the grounding wire, the green LED lamp is turned on; when the first electromagnetic lock receives a power-on signal of the power supply 70, the red LED lamp is on, and the sound prompt module can make a dripping sound (the sound prompt module can be used as a supplementary prompt when the red LED lamp is broken); when the first electromagnetic lock receives that the first test area 100 is in the working state, the yellow LED lamp is turned on to indicate that the equipment in the first test area 100 is in the working state; when the first electromagnetic lock receives a grounding signal that the grounding wire is not firm, the contact is poor or the grounding wire is disconnected, the first electromagnetic lock is locked, so that the first retractable door 50 cannot be opened, and a tester cannot enter the first test area 100.
Further, the first detecting device 10 further includes: a first wireless communication module. The first wireless communication module is in communication connection with the control device 40, so that the first detection device 10 can communicate with the control device 40. Optionally, the first wireless communication module includes, but is not limited to, any one or more of a 2G module, a 3G module, a 4G module, a 5G module, a WIFI module, and a bluetooth module.
In some embodiments, the second detecting device 20 is communicatively connected to the control device 40, and is configured to perform an instruction operation according to the instruction signal sent by the control device 40 and send a locking signal of the second test area 200 to the control device 40.
Further, in some embodiments, the second detecting device 20 includes: a second electromagnetic lock; the second test zone 200 comprises: a second retractable door 60. The second electromagnetic lock is disposed at an entrance of the second test area 200 and is connected to the second retractable door 60.
The second electromagnetic lock is configured to detect an open/close state of the second retractable door 60, and send a locking signal of the second retractable door 60 to the control device 40 when the second retractable door 60 is closed; and is used for carrying out the work of indicating the connection of the grounding wire according to the indicating signal sent by the control device 40; and/or, according to the indication signal sent by the control device 40, the power supply 70 is switched on to indicate the work; and/or perform an indication that the second test area 200 is operational based on the indication signal sent by the control device 40.
In some embodiments, the second electromagnetic lock may include at least one LED light and an audible cue module. The at least one LED lamp and the audible prompt module can be used for executing corresponding indication work. For example, in some embodiments, the second electromagnetic lock may include a green LED light, a red LED light, and a yellow LED light. When the second electromagnetic lock receives a grounding signal of the grounding wire, the green LED lamp is turned on; when the second electromagnetic lock receives a power-on signal of the power supply 70, the red LED lamp is on, and the sound prompt module can make a dripping sound (the sound prompt module can be used as a supplementary prompt when the red LED lamp is broken); when the second electromagnetic lock receives that the second test area 200 is in the working state, the yellow LED lamp is turned on to indicate that the equipment in the second test area 200 is in the working state; when the second electromagnetic lock receives a grounding signal that the grounding wire is not firm, the contact is poor or the grounding wire is disconnected, the second electromagnetic lock is locked, so that the second retractable door 60 cannot be opened, and a tester cannot enter the second test area 200.
Further, the second detecting device 20 further includes: and a second wireless communication module. The second wireless communication module is in communication connection with the control device 40, so that the second detection device 20 can communicate with the control device 40. Optionally, the second wireless communication module includes, but is not limited to, any one or more of a 2G module, a 3G module, a 4G module, a 5G module, a WIFI module, and a bluetooth module.
In some embodiments, the third detecting device 30 is communicatively connected to the control device 40, and is configured to detect a ground line status of the high-voltage wires in the first test area 100 and send a ground signal to the control device 40.
In some embodiments, the control device 40 is configured to detect a grounding state of a grounding line according to the grounding signal, and send an indication signal to the first detection device 10 and the second detection device 20 according to the grounding state and an on-off state of the power source 70.
Further, in some embodiments, the control device 40 includes: the device comprises a power supply module, an interface module connected with the power supply and a controller.
The power module is connected with the interface module and the controller and used for supplying power to the interface module and the controller. The interface module is respectively connected with the controller and the power supply 70, and is used for switching on and off the power supply 70 according to the control of the controller. The controller is configured to detect a grounding state of the grounding line according to the grounding signal sent by the third detecting device 30, and control the power supply 70 to be turned on or off according to the grounding state; and sending an indication signal to the first detection device 10 and the second detection device 20 according to the on-off state of the power supply 70.
Specifically, when the controller receives a ground signal sent by the third detection device 30 and indicating that the ground line is connected, the controller sends an unlocking indication signal to the first electromagnetic lock and the second electromagnetic lock according to the connected ground signal, and simultaneously controls the interface module to be disconnected from the power supply 70; after the first electromagnetic lock and the second electromagnetic lock receive the unlocking indication signal, the unlocking action is respectively executed, meanwhile, the respective green LED lamps are constantly lighted, at the moment, when the tester sees that the green LED lamps are constantly lighted, the safety of the first test area 100 and the second test area 200 can be confirmed, the first retractable door 50 and/or the second retractable door 60 can be directly opened, and the tester enters the first test area 100 and/or the second test area 200 to work. When the controller receives a ground signal which is sent by the third detection device 30 and has problems of poor ground wire, weak ground, broken ground wire and the like, the controller sends a locking indication signal to the first electromagnetic lock and the second electromagnetic lock according to the problematic ground signal, and simultaneously the controller controls the interface module to be disconnected from the power supply 70; after receiving the locking indication signal, the first electromagnetic lock and the second electromagnetic lock respectively lock the first retractable door 50 and the second retractable door 60, so that the tester cannot open the first retractable door 50 and the second retractable door 60, and further informs the tester that the first test area 100 and the second test area 200 are unsafe, so that the tester cannot enter the first test area 100 and the second test area 200, and the personal safety of the tester is ensured.
In addition, after the tester finishes working and takes away the ground wire, the first retractable door 50 and the second retractable door 60 are locked, and after the first electromagnetic lock and the second electromagnetic lock respectively detect the closing states of the first retractable door 50 and the second retractable door 60, the first electromagnetic lock and the second electromagnetic lock are respectively locked, and simultaneously send a locking signal of the first retractable door 50 and a locking signal of the second retractable door 60 to the controller, at this time, the controller controls the interface module to be communicated with the power supply 70; after the power supply 70 starts to supply power, the controller sends power-on signals to the first electromagnetic lock and the second electromagnetic lock, and the red LED lamps of the first electromagnetic lock and the second electromagnetic lock start to flash to remind the testers that the testers cannot enter the first test area 100 and the second test area 200.
Further, the control device 40 further includes: a fourth wireless communication module connected with the controller;
the fourth wireless communication module is in communication connection with the first detection device 10, the second detection device 20 and the third detection device 30, so that the control device 40 can communicate with the first detection device 10, the second detection device 20 and the third detection device 30.
Further, the control device 40 further includes: and the display module is connected with the controller. The display module is used for displaying the grounding state of the grounding wire, the working state of the first test area 100, the working state of the second test area 200 and the on-off state of the power supply 70.
Fig. 2 shows the communication between the first detection device 10, the second detection device 20, the third detection device 30 and the control device 40.
Further, in some embodiments, as shown in fig. 3, the third detecting device 30 includes: a monitoring device 35 communicatively coupled to the control device 40. The monitoring device 35 is configured to detect a ground line state of the high-voltage electric line in the first test area 100 and send the ground signal to the control device 40.
Further, in some embodiments, the third detecting device 30 further includes: the clamping device comprises a first clamping device 31, a second clamping device 32 which is rotatably connected with and insulated from the first clamping device 31, and a switch device 34 arranged on the second clamping device 32.
A first end of the monitoring device 35 is connected with the first clamping device 31, a second end of the monitoring device 35 is connected with the switching device 34, and a third end of the monitoring device 35 is grounded and the second clamping device 32 is grounded; when the first clamping device 31 and the second clamping device 32 are clamped on a high-voltage wire, if the first clamping device 31 and the second clamping device 32 are stably clamped on the high-voltage wire and a grounding wire is conducted, the monitoring device 35 outputs a first indication signal; if the first clamping device 31 and the second clamping device 32 are in poor contact with the high-voltage electric wire and/or the ground wire, the monitoring device 35 outputs a second indication signal. Further, when the first clamping device 31 and the second clamping device 32 are clamped on the high-voltage electric wire, if the first clamping device 31 and the second clamping device 32 are stably clamped on the high-voltage electric wire and the ground wire is conducted, the monitoring device 35 outputs a first indication signal; if the first clamping device 31 and the second clamping device 32 are in poor contact with the high-voltage wire and/or the ground wire, the monitoring device 35 outputs a second indication signal. The first indication signal is an indication signal when the first clamping device 31 and the second clamping device 32 are stably clamped on the high voltage wire, the contact point is good, and the ground wire is reliably grounded (i.e., the ground wire is conducted). The second indication signal is an indication signal when any one of the weak ground line, the poor contact, the problem of the ground point itself, the poor contact between the first clamping device 31 and the second clamping device 32 with the high-voltage wire, and the poor contact of the ground line exists. When the monitoring device 35 outputs the first indication signal, it indicates that the grounding is good and the working environment is safe; when the monitoring device 35 outputs the second indication signal, it indicates that the working environment is unsafe and the work is not possible.
Further, as shown in fig. 4 and 5, in some embodiments, the third detecting device 30 further includes: and an insulated rotating shaft 33 connected with the first clamping device 31 and the second clamping device 32 respectively so that the first clamping device 31 and the second clamping device 32 can be rotatably connected and insulated. Specifically, the first clamping device 31 and the second clamping device 32 can be simultaneously operated, such as clamping and the like. In addition, through this design, can make this detection device can accurately detect whether the earth connection is good.
In some embodiments, the first clamping device 31 comprises: a grounding clip; the second clamping device 32 includes: and (6) testing the clamp.
Specifically, this ground clip includes: first clamping part and first connecting portion. This test clip includes: a second clamping portion and a second connecting portion.
Wherein, the first connecting part is connected with the first end of the monitoring device 35, the second connecting part is grounded, and the switch device 34 is arranged on the second clamping part; when the first clamping portion of the grounding clamp and the second clamping portion of the test clamp the high-voltage wire, the switch device 34 is closed, and the monitoring device 35 is started. Specifically, by disposing the switch device 34 in the second clamping portion of the test clip, when the test clip is not operated, there is nothing in the middle of the test clip, and there is no influence on the switch device 34, and at this time, the switch device 34 is in an open state, and therefore, the loop in the monitoring device 35 does not operate. When the test clamp is clamped on the high voltage line, the high voltage line presses the switching device 34, the resulting force closes the switching device 34 and the circuit in the monitoring device 35 starts to operate.
In some embodiments, optionally, the switching device 34 comprises: a micro switch. Through set up micro-gap switch in second clamping device 32's clamping part, as long as there is something in second clamping device 32's clamping part centre gripping, can produce the effect to micro-gap switch, this effort can make this micro-gap switch close rapidly to trigger circuit work.
In some embodiments, the monitoring device 35 may include: the monitoring device includes a monitoring device body, a power supply device 351, a current detection circuit 352, a first indication circuit 354, and a second indication circuit 355, which are provided on the monitoring device body.
A first terminal of the power supply device 351 is connected to a first terminal of the switching device 34, a second terminal of the switching device 34 is connected to a first terminal of the current detection circuit 352, and a second terminal of the current detection circuit 352 is connected to a second terminal of the power supply device 351; a first terminal of the first indicator circuit 354 is connected to a first terminal of the current detector circuit 352, and a second terminal of the first indicator circuit 354 is connected to a second terminal of the current detector circuit 352; a first terminal of the second indicator circuit 355 is connected to a first terminal of the current sense circuit 352, and a second terminal of the second indicator circuit 355 is connected to a second terminal of the current sense circuit 352.
When the first clamping device 31 and the second clamping device 32 are stably clamped on the high-voltage electric wire and the ground wire is conducted, the switch device 34 is closed, the current detection circuit 352 operates, and the first indication circuit 354 is conducted and outputs a first indication signal. The first clamping device 31 and the second clamping device 32 are in poor contact with the high-voltage wire and/or the ground wire, the current detection circuit 352 does not work, and the second indication circuit 355 is conducted and outputs a second indication signal.
In some embodiments, the current sense circuit 352 includes: a current limiting circuit 353 and a current detection relay.
Wherein, this current detection relay includes: a current detection unit.
Specifically, a first end of the current limiting circuit 353 is connected to a second end of the switching device 34 as a first end of the current detecting circuit 352, a second end of the current limiting circuit 353 is connected to the second clamping device 32, a first end of the current detecting unit is connected to the first clamping device 31, and a second end of the current detecting unit is connected to a second end of the power feeding device 351 as a second end of the current detecting circuit 352.
Further, the current detection relay further includes: a first switch; the first indicating circuit 354 includes: a first indicator light.
Specifically, a first end of the first switch is connected with a first end of the current-limiting current, a second end of the first switch is connected with a first end of the first indicator light, and a second end of the first indicator light is connected with a second end of the current detection portion.
When the first clamping device 31 and the second clamping device 32 are stably clamped on the high-voltage wire and the ground wire is conducted, the switch device 34 is closed, the current detection part controls the first switch to be closed, and the first indicator lamp generates a first indication signal. In some embodiments, the first indicator light may be an LED light, wherein the first indicator light may be a green light.
Further, in some embodiments, the current detection relay includes: a second switch; the second indicating circuit 355 includes: and a second indicator light.
Specifically, a first end of the second switch is connected with a first end of the current-limiting current, a second end of the second switch is connected with a first end of the second indicator light, and a second end of the second indicator light is connected with a second end of the current detection portion.
When the first clamping device 31 and the second clamping device 32 are in poor contact with the high-voltage wire and/or the grounding wire, the switch device 34 is closed, the current detection part controls the second switch to be closed, and the second indicator lamp generates a second indicator signal. In some embodiments, the second indicator light may be an LED light, wherein the second indicator light may be a red light.
Further, in some embodiments, the second indication circuit 355 further includes: an alarm. The alarm is connected with the second indicating lamp in parallel. Optionally, the alarm includes, but is not limited to, an audible alarm such as a buzzer or a horn.
When the first clamping device 31 and the second clamping device 32 are in poor contact with the high-voltage wire and/or the grounding wire, the switch device 34 is closed, the current detection part controls the second switch to be closed, and the alarm works and outputs an alarm signal.
Further, in some embodiments, the current limiting circuit 353 may include: a current limiting resistor. The first end of the current limiting resistor is the first end of the current limiting circuit 353, and the second end of the current limiting resistor is the second end of the current limiting circuit 353. Alternatively, in some embodiments, the current limiting circuit 353 may be implemented by a single resistor or a plurality of resistors connected in series and in parallel, and the present invention is not particularly limited and claimed.
In some embodiments, the power supply device 351 may be a battery, wherein the battery may be a rechargeable battery or a non-rechargeable battery, wherein the battery capacity is determined by specific requirements, and the invention is not limited thereto.
Further, as shown in fig. 6, it is an equivalent circuit schematic diagram of the embodiment of the present invention.
Specifically, as shown in fig. 6, the present invention allows two clips (a ground clip and a test clip) to be rotated simultaneously by connecting the two clips through an insulating rotating shaft 33, and in fig. 6, the two clips are equivalent to S0 in fig. 6. Due to the characteristics of the current detection relay, when the current flowing through the current detection relay is less than 0.1A, the current detection relay does not act, at the moment, the first switch is in a normally open state, and the second switch is in a normally closed state; when the current flowing through the current detection relay is larger than 0.1A, the current detection relay acts to control the first switch to be closed and the second switch to be opened. Therefore, based on the principle, when the grounding clamp and the test clamp do not work (do not clamp things), there is nothing in the middle of the test clamp, and the micro switch is not stressed, so that the micro switch is in an open circuit state, the monitoring loop does not work, no current is arranged on the current detection relay, and the current detection relay does not work. When the grounding clip and the test clip are clamped on the high-voltage wire, the grounding clip and the test clip are conducted (namely S0 is closed), and meanwhile, the high-voltage wire presses the micro switch, so that the micro switch is closed due to stress, and the monitoring loop starts to work. Taking the battery voltage of 1.5V and the current limiting resistor of 7 ohms as an example, the detection device and the monitoring device 35 form a loop through a high-voltage wire, and the current detection relay monitors the loop current. If the grounding clip and the testing clip are well clamped on the high-voltage wire and the grounding wire is also well conducted, the resistance of the grounding clip is basically negligible, 0.25A of current is generated, at the moment, the current detection relay acts, the first switch is closed, the second switch is opened, and the first indicator light (green light) is turned on. If the grounding clamp and the test clamp are not clamped on the high-voltage wire or the ground wire is broken, the current is basically equal to 0, the current detection relay does not act, the second switch is in an off state, the first switch is kept in an on state, at the moment, the second indicator light (red light) is turned on, and meanwhile, the buzzer/loudspeaker gives an alarm to remind a worker that the worker is dangerous and cannot operate.
Further, in some embodiments, the third detecting device 30 further includes: and a third wireless communication module. The third wireless communication module is in communication connection with the control device 40, so that the third detection device 30 can communicate with the control device 40. Optionally, the second wireless communication module includes, but is not limited to, any one or more of a 2G module, a 3G module, a 4G module, a 5G module, a WIFI module, and a bluetooth module.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (18)
1. An electrical high-voltage test area safety protection system, comprising: a control device, a first detection device, a second detection device, and a third detection device;
the control device is arranged between the tester and the power supply, the first detection device is arranged at the inlet of the first test area, the second detection device is arranged at the inlet of the second test area, and the third detection device is arranged outside the first test area;
the first detection device is in communication connection with the control device and is used for executing instruction work according to the instruction signal sent by the control device and sending a locking signal of the first test area to the control device;
the second detection device is in communication connection with the control device and is used for executing instruction work according to the instruction signal sent by the control device and sending a locking signal of the second test area to the control device;
the third detection device is in communication connection with the control device and is used for detecting the state of a grounding wire of the high-voltage wire in the first test area and sending a grounding signal to the control device;
the control device is used for detecting the grounding state of the grounding wire according to the grounding signal and sending an indication signal to the first detection device and the second detection device according to the grounding state and the on-off state of the power supply.
2. An electrical high voltage test area safety protection system according to claim 1, wherein the first detection means comprises: a first electromagnetic lock; the first test zone comprises: a first retractable door;
the first electromagnetic lock is arranged at an inlet of the first test area and is connected with the first telescopic door;
the first electromagnetic lock is used for detecting the opening/closing state of the first retractable door and sending a locking signal of the first retractable door to the control device when the first retractable door is closed; and the number of the first and second groups,
the ground wire switch-on indicating device is used for executing ground wire switch-on indicating work according to an indicating signal sent by the control device; and/or, the power supply connection indicating work is executed according to the indicating signal sent by the control device; and/or performing an indicating operation that the first test area is operable according to an indicating signal sent by the control device.
3. An electrical high voltage test area safety protection system according to claim 1, wherein the first detection device further comprises: a first wireless communication module;
the first wireless communication module is in communication connection with the control device, so that the first detection device can communicate with the control device.
4. An electrical high voltage test area safety protection system according to claim 1, wherein the second detection means comprises: a second electromagnetic lock; the second test zone comprises: a second retractable door;
the second electromagnetic lock is arranged at an inlet of the second test area and is connected with the second telescopic door;
the second electromagnetic lock is used for detecting the opening/closing state of the second retractable door and sending a locking signal of the second retractable door to the control device when the second retractable door is closed; and the number of the first and second groups,
the ground wire switch-on indicating device is used for executing ground wire switch-on indicating work according to an indicating signal sent by the control device; and/or, the power supply connection indicating work is executed according to the indicating signal sent by the control device; and/or performing an indicating operation that the second test area is operable according to an indicating signal transmitted by the control device.
5. An electrical high voltage test area safety protection system according to claim 1, wherein the second detection means further comprises: a second wireless communication module;
the second wireless communication module is in communication connection with the control device, so that the second detection device can communicate with the control device.
6. An electrical high voltage test area safety protection system according to claim 1, wherein the third detection means comprises: the monitoring device is in communication connection with the control device;
the monitoring device is used for detecting the state of a grounding wire of the high-voltage wire in the first test area and sending the grounding signal to the control device.
7. An electrical high voltage test area safety protection system according to claim 6, wherein the third detection means further comprises: the device comprises a first clamping device, a second clamping device which is rotatably connected with the first clamping device and is insulated, and a switch device arranged on the second clamping device;
the first end of the monitoring device is connected with the first clamping device, the second end of the monitoring device is connected with the switching device, and the third end of the monitoring device is grounded and the second clamping device is grounded;
when the first clamping device and the second clamping device are clamped on a high-voltage wire, if the first clamping device and the second clamping device are stably clamped on the high-voltage wire and a grounding wire is conducted, the monitoring device outputs a first indicating signal; and if the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the monitoring device outputs a second indicating signal.
8. An electrical high voltage test area safety protection system according to claim 7, wherein the third detection means further comprises: and the insulating rotating shaft is respectively connected with the first clamping device and the second clamping device so that the first clamping device and the second clamping device can be rotatably connected and insulated.
9. An electrical high voltage test area safety protection system according to claim 7, wherein the first clamping device comprises: a grounding clip; the second clamping device includes: a test clip;
the ground clip includes: a first clamping part and a first connecting part;
the test clip includes: a second clamping portion and a second connecting portion;
the first connecting part is connected with a first end of the monitoring device, the second connecting part is grounded, and the switching device is arranged on the second clamping part; when the first clamping part of the grounding clamp and the second clamping part of the testing clamp the high-voltage wire, the switch device is closed, and the monitoring device is started.
10. An electrical high voltage test area safety protection system according to claim 7, wherein the monitoring device comprises: the monitoring device comprises a monitoring device body, a power supply device, a current detection circuit, a first indicating circuit and a second indicating circuit, wherein the power supply device, the current detection circuit, the first indicating circuit and the second indicating circuit are arranged on the monitoring device body;
the first end of the power supply device is connected with the first end of the switch device, the second end of the switch device is connected with the first end of the current detection circuit, and the second end of the current detection circuit is connected with the second end of the power supply device;
the first end of the first indicating circuit is connected with the first end of the current detecting circuit, and the second end of the first indicating circuit is connected with the second end of the current detecting circuit;
the first end of the second indicating circuit is connected with the first end of the current detecting circuit, and the second end of the second indicating circuit is connected with the second end of the current detecting circuit;
when the first clamping device and the second clamping device are stably clamped on the high-voltage wire and the grounding wire is conducted, the switch device is closed, the current detection circuit works, and the first indicating circuit is conducted and outputs the first indicating signal;
the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the current detection circuit does not work, and the second indicating circuit is conducted and outputs the second indicating signal.
11. An electrical high voltage test area safety protection system according to claim 10, wherein the current detection circuit comprises: a current limiting circuit and a current detection relay;
the current detection relay includes: a current detection unit;
the first end of the current limiting circuit is used as the first end of the current detection circuit to be connected with the second end of the switch device, the second end of the current limiting circuit is connected with the second clamping device, the first end of the current detection part is connected with the first clamping device, and the second end of the current detection part is used as the second end of the current detection circuit to be connected with the second end of the power supply device.
12. The electrical high voltage test area safety protection system of claim 11, wherein the current sensing relay comprises: a first switch; the first indication circuit includes: a first indicator light;
a first end of the first switch is connected with a first end of the current-limiting current, a second end of the first switch is connected with a first end of the first indicator light, and a second end of the first indicator light is connected with a second end of the current detection part;
when the first clamping device and the second clamping device are stably clamped on the high-voltage wire and the grounding wire is conducted, the switch device is closed, the current detection portion controls the first switch to be closed, and the first indicator lamp generates the first indicator signal.
13. The electrical high voltage test area safety protection system of claim 11, wherein the current sensing relay comprises: a second switch; the second indicating circuit includes: a second indicator light;
a first end of the second switch is connected with a first end of the current-limiting current, a second end of the second switch is connected with a first end of the second indicator light, and a second end of the second indicator light is connected with a second end of the current detection part;
when the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the switch device is closed, the current detection part controls the second switch to be closed, and the second indicator lamp generates the second indicator signal.
14. An electrical high voltage test area safety protection system according to claim 13, wherein the second indicator circuit further comprises: an alarm;
the alarm is connected with the second indicator light in parallel;
when the first clamping device and the second clamping device are in poor contact with the high-voltage wire and/or the grounding wire, the switch device is closed, the current detection part controls the second switch to be closed, and the alarm works and outputs an alarm signal.
15. An electrical high voltage test area safety protection system according to claim 6, wherein the third detection means further comprises: a third wireless communication module;
the third wireless communication module is in communication connection with the control device, so that the third detection device can communicate with the control device.
16. An electrical high voltage test area safety protection system according to claim 1, wherein the control device comprises: the power supply module, the interface module connected with the power supply and the controller;
the power supply module is connected with the interface module and the controller and used for supplying power to the interface module and the controller;
the interface module is respectively connected with the controller and the power supply and is used for switching on and switching off the power supply according to the control of the controller;
the controller is used for detecting the grounding state of the grounding wire according to the grounding signal sent by the third detection device and controlling the power supply to be switched on or off according to the grounding state; and sending an indication signal to the first detection device and the second detection device according to the on-off state of the power supply.
17. An electrical high voltage test area safety protection system according to claim 16, wherein the control device further comprises: a fourth wireless communication module connected with the controller;
the fourth wireless communication module is in communication connection with the first detection device, the second detection device and the third detection device, so that the control device can communicate with the first detection device, the second detection device and the third detection device.
18. An electrical high voltage test area safety protection system according to claim 16, wherein the control device further comprises: a display module connected with the controller;
the display module is used for displaying the grounding state of the grounding wire, the working state of the first test area, the working state of the second test area and the on-off state of the power supply.
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| CN202010688333.3A CN111983396B (en) | 2020-07-16 | 2020-07-16 | Safety protection system for electric high-voltage test area |
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| CN111983396B (en) | 2023-06-13 |
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