CN112928625A - Safety protection system for centrally installed switchgear - Google Patents
Safety protection system for centrally installed switchgear Download PDFInfo
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- CN112928625A CN112928625A CN202110083059.1A CN202110083059A CN112928625A CN 112928625 A CN112928625 A CN 112928625A CN 202110083059 A CN202110083059 A CN 202110083059A CN 112928625 A CN112928625 A CN 112928625A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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Abstract
The application relates to a safety protection system of a centrally installed switchgear, which comprises a power transmission switch, a grounding switch and an interlocking module; when the grounding switch is in a closed state, the interlocking module locks the power transmission switch and enables the power transmission switch to be in an open state; when the power transmission switch is in a closed state, the interlocking module locks the grounding switch and enables the grounding switch to be in an open state; when the grounding switch is in a closed state, the middle cabinet is grounded; when the power transmission switch is in a closed state, the middle-placed cabinet transmits power. In the process of operating the centrally installed switchgear by a person, if the person operates correctly according to the operating specification, the interlocking module does not interfere with the correct operation of the person; if the personnel careless mistakes and causes misoperation, the interlocking module prevents misoperation of the personnel, reduces the possibility of misoperation of the personnel, prevents the electrified grounding switch from being connected and prevents the electrified ground wire from being powered on, and ensures the safety of the personnel and equipment.
Description
Technical Field
The application relates to the field of centrally installed switchgear, in particular to a centrally installed switchgear safety protection system.
Background
A centrally installed switchgear is called a metal armored centrally installed withdrawable switchgear, and belongs to a high-voltage power distribution device.
The centrally installed switchgear is divided into three layers, wherein the upper layer is a bus and an instrument room (isolated from each other), the middle layer is a breaker room, and the lower layer is a cable room.
When the person is putting the cabinet in operation, it should be noted that: preventing live closing of the grounding switch; preventing power transmission with ground. Therefore, before the person goes on duty to operate the centrally installed switchgear, the person can be trained in the operation specification, and the person follows the operation specification to correctly operate the centrally installed switchgear.
In view of the above related technologies, the inventor thinks that in the actual operation process of personnel, careless mistakes can occur to cause, and further cause the electrified grounding switch to be closed, and electrified ground wire to be powered on, thereby generating potential safety hazards.
Disclosure of Invention
In order to reduce the probability of personnel's maloperation, guarantee the safety of personnel and equipment, this application provides a put cabinet safety protection system in.
The application provides a put cabinet safety protection system in and adopts following technical scheme:
a safety protection system for a centrally installed switchgear comprises a power transmission switch, a grounding switch and an interlocking module;
when the grounding switch is in a closed state, the interlocking module locks the power transmission switch and enables the power transmission switch to be in an open state;
when the power transmission switch is in a closed state, the interlocking module locks the grounding switch and enables the grounding switch to be in an open state;
when the grounding switch is in a closed state, the middle cabinet is grounded; when the power transmission switch is in a closed state, the middle-placed cabinet transmits power.
By adopting the technical scheme, if the personnel correctly operate according to the operation specification in the process of operating the centrally installed switchgear by the personnel, the interlocking module does not interfere with the correct operation of the personnel;
if the personnel careless mistakes, the misoperation is caused;
firstly, misoperation: in the grounding state, the operation of closing the power transmission switch is performed, at the moment, the grounding switch is in the closing state, and the interlocking module limits the closing of the power transmission switch so as to prevent power transmission with a ground wire;
and (2) misoperation II: in the power transmission state, the grounding switch is closed, at the moment, the power transmission switch is in the closed state, and the interlocking module limits the closing of the grounding switch so as to prevent the grounding switch from being closed in a charged state;
when above-mentioned two kinds of maloperation take place promptly, the interlocking module stops and personnel's maloperation, reduces personnel's probability of maloperation, prevents electrified closed earthing switch and prevents to take the ground wire power transmission, guarantees personnel and equipment's safety.
Optionally, the grounding switch has a rotating grounding shaft; the rotary grounding shaft is rotatably connected with a cabinet body of the centrally installed switchgear around the axis of the rotary grounding shaft;
the interlocking module comprises a gear ring and a clamping block;
the gear ring is coaxially and rotatably sleeved to the periphery of the rotary grounding shaft; the gear ring is also provided with a sliding groove, the sliding groove extends along the circumferential direction of the gear ring, and the central angle corresponding to the sliding groove is smaller than 360 degrees;
the fixture block is fixedly connected with the rotary grounding shaft, and one end of the fixture block is embedded into the chute in a sliding manner; when the clamping block rotates to the grounding position along with the rotating grounding shaft, the middle-placed cabinet is grounded; when the clamping block rotates to a disconnection position along with the rotating grounding shaft, the middle-placed cabinet is not grounded;
when the power transmission switch is in a disconnected state, the sliding groove is superposed at a grounding position and a disconnecting position; when the power transmission switch is in a closed state, the sliding groove only overlaps an open position.
By adopting the technical scheme, when the power transmission switch is in a closed state, the sliding groove is only overlapped at the open position, the position of the clamping block is limited by the sliding groove, at the moment, if a person carries out the operation of closing the grounding switch, the sliding groove is matched with the clamping block to limit the rotation of the rotary grounding shaft, namely, the rotary grounding shaft cannot rotate to the closed grounding switch, so that the grounding of the middle cabinet is prevented, and the charged closed grounding switch is prevented;
when the power transmission switch is in an off state, the sliding groove is superposed at the grounding position and the off position, and the clamping block which is slidably embedded in the sliding groove can freely slide between the grounding position and the off position, namely, the rotating grounding shaft can freely rotate to realize the on-off or off-off of the grounding switch.
Optionally, the power transmission switch has a rotary power transmission shaft; the rotary power transmission shaft rotates around the axis of the rotary power transmission shaft and is connected with a cabinet body of the middle-placed cabinet, and the rotary power transmission shaft is parallel to the rotary grounding shaft;
the sliding groove is coincided with the grounding position and the disconnection position, and when the clamping block rotates to the grounding position along with the rotating grounding shaft, the clamping block is attached to one side wall of the sliding groove along the circumferential direction of the rotating grounding shaft;
the interlock module further comprises a gear;
the gear is coaxially and fixedly connected with the rotary transmission electric shaft; and the gear engages the gear ring;
when the rotary transmission electric shaft rotates to the power transmission switch and is in a disconnected state, the sliding chute is driven to rotate to be overlapped at a grounding position and a disconnected position through the gear and the gear ring;
when the rotary power transmission shaft rotates to the power transmission switch and is in a closed state, the sliding groove is driven to rotate to only be overlapped at an open position through the gear and the gear ring.
Through adopting above-mentioned technical scheme, when putting cabinet ground connection in, earthing switch is in the closure, and the fixture block is located earthing device, and at this moment, the fixture block laminating is to the lateral wall of spout to the rotation of restriction ring gear, and then through the meshing of ring gear and gear, the rotation of restriction power transmission rotation axis realizes preventing to take the ground wire power transmission.
Optionally, the system further comprises a self-locking module; the self-locking module comprises a clamping piece and a driving piece;
the clamping piece is connected with the cabinet body of the middle-placed cabinet in a sliding manner; one end of the clamping piece is used for tightly abutting against the gear ring;
the driving piece is connected with the cabinet body of the middle cabinet;
when the grounding switch is in a closed state or the power transmission switch is in a closed state, the driving piece drives the clamping piece to tightly abut against the gear ring so as to limit the rotation of the gear ring;
when the grounding switch is in a disconnected state or the power transmission switch is in a disconnected state, the driving piece drives the clamping piece to be separated from the gear ring.
Through adopting above-mentioned technical scheme, when earthing switch is in the closure state or power transmission switch is in the closure state, the fastener supports tight ring gear in order to restrict the rotation of ring gear, increases the rotation resistance of ring gear to realize preventing electrified closed earthing switch and prevent the power transmission of electrified ground wire.
Optionally, the chute is overlapped at the grounding position and the disconnection position, when the fixture block rotates to the grounding position along with the rotating grounding shaft, the fixture block is attached to a side wall of the chute along the circumferential direction of the rotating grounding shaft, and the side wall is an abutting surface;
the sliding groove is only overlapped at the disconnection position, the clamping block is positioned at the disconnection position, and the clamping block is attached to the abutting surface of the sliding groove;
the safety protection system of the centrally installed switchgear further comprises a pressure sensor and a controller;
the pressure sensor is arranged on the abutting surface of the sliding chute and used for detecting the extrusion force of the clamping block on the side wall of the sliding chute and outputting a pressure signal, and the pressure signal is increased along with the increase of the extrusion force;
the controller is coupled with the pressure sensor and used for receiving the pressure signal, and the controller is used for controlling the driving piece to drive the clamping piece to abut against the gear ring when the pressure signal is larger than 0.
By adopting the technical scheme, when the grounding switch is in a closed state, if a person performs operation of closing the power transmission switch, the person applies torque to the rotary power transmission shaft to rotate the rotary power transmission shaft, namely the rotary power transmission shaft has a rotating trend, the torque is transmitted to the gear ring through the gear to enable the gear ring to have the rotating trend, at the moment, the sliding groove rotates along with the rotation of the gear ring, so that the extrusion force between the abutting surface and the gear ring is increased, the pressure signal is increased and is greater than a preset value, the driving piece driving clamping piece is controlled to abut against the gear ring to limit the rotation of the gear ring, and the power transmission with the ground wire is prevented;
when the power transmission switch is in a closed state, if a person operates to close the grounding switch, the person applies torque to the rotary grounding shaft to rotate the rotary grounding shaft, the clamping block rotates along with the rotary grounding shaft, so that the extrusion force between the abutting surface and the abutting surface is increased, the pressure signal is increased and is larger than a preset value, and the driving piece is controlled to drive the clamping piece to abut against the gear ring, so that the rotation of the gear ring is limited, and the grounding switch is prevented from being closed in an electrified mode.
Optionally, the system further comprises an identification module, a detection module and a punishment module;
the identification module is arranged on the cabinet body of the middle cabinet, and is used for identifying personnel information and sending the personnel information to the punishment module when the personnel operate the middle cabinet;
the detection module is arranged on the cabinet body of the centrally installed switchgear and used for detecting whether a person operates in a wrong way or not and outputting a detection signal when the person operates in the wrong way;
the punishment module is coupled with the detection module, receives the personnel information and the detection signal, and generates punishment decision.
By adopting the technical scheme, when the personnel have misoperation behaviors, the punishment module sends out punishment decision to the personnel, and the punishment decision can be executed by management personnel, and the personnel are punished due to misoperation, so that the personnel can absorb teaching and training conveniently, and then the personnel can accurately operate according to the operation specification strictly in the later operation process.
Optionally, the system further comprises an information database;
personal information is stored in the information database, and the personal information comprises personnel information and skill levels;
the identification module identifies personnel information and sends the personnel information to the punishment module and the information database;
the information database receives personnel information and sends corresponding skill levels to the punishment module;
the punishment module receives the personnel information, the skill level and the detection signal, and generates punishment determination according to the skill level, wherein the punishment determination is more serious when the skill level is higher.
Through adopting above-mentioned technical scheme, operating personnel probably is apprentice, elementary electrician, middle level electrician etc. if carry out the maloperation for the apprentice, because the apprentice itself still is in the learning stage, then comparatively loose is decided to the punishment of apprentice, if: warning and punishing; if the primary electrician performs the misoperation and the primary electrician has the operation capability, the punishment decision of the primary electrician is relatively serious, such as: where a serious warning is given.
Optionally, the system further comprises a security module;
the security module is coupled with the identification module and the information database;
the identification module identifies one or more personnel information on the peripheral side of the centrally installed switchgear and sends all the personnel information to an information database;
the information database receives one or more personnel information and sends all corresponding skill levels to the security module;
the safety module receives all skill levels and compares the received skill levels with a preset level;
if all skill levels are lower than the preset level, the safety module controls the interlocking module to lock; and if at least one skill level is equal to or higher than a preset level, the safety module controls the interlocking module to work normally.
By adopting the technical scheme, the power transmission switch is in a closed state, the interlocking module limits the operation of anyone for closing the grounding switch, and prevents the grounding switch from being closed in an electrified way;
when only the apprentice is on the spot, the identification module identifies personnel information, the information database outputs a skill level corresponding to the apprentice, the safety module receives the skill level and compares the skill level with a preset level, and after the skill level of the apprentice is lower than the preset level, the safety module controls the interlocking module to be locked, and no matter the number of the apprentice is large or small, no matter the grounding switch is closed or opened, any apprentice is forbidden to independently operate (close or open) the power transmission switch;
the apprentice and its master are all when on the scene, and safety module receives the skill level and after predetermineeing the level comparison, because of master's skill level equals or is higher than predetermineeing the level, safety module control interlocking module normally works, puts the cabinet in the master operation in order to supply the apprentice to study, perhaps, the apprentice can operate under master's guidance.
In summary, the present application includes at least one of the following beneficial technical effects:
in the process of operating the centrally installed switchgear by a person, if the person operates correctly according to the operating specification, the interlocking module does not interfere with the correct operation of the person; if the personnel careless mistakes and misoperation is caused, the interlocking module prevents the misoperation of the personnel, reduces the possibility of the misoperation of the personnel, prevents the electrified grounding switch from being connected and the electrified ground wire from being powered on, and ensures the safety of the personnel and equipment;
when the personnel have misoperation behaviors, the punishment module sends out punishment decision to the personnel, and the punishment decision can be executed by management personnel, and the personnel are punished due to misoperation, so that the personnel can absorb teaching and training conveniently, and then the personnel can accurately operate according to the operation specification in the later operation process.
Drawings
Fig. 1 is a schematic overall structure diagram of a centrally installed cabinet.
Fig. 2 is a schematic diagram of a safety protection system of a centrally installed switchgear.
Fig. 3 is a schematic diagram of the overall configuration of the power transmission switch and the ground switch.
Fig. 4 is a schematic view of the overall structure of the interlocking module and the self-locking module.
Figure 5 is an exploded view of the connection of the ring gear to the rotating grounded shaft.
Description of reference numerals: 1. a worker card; 2. an identification module; 3. an information database; 4. a detection module; 41. a pressure sensor; 42. a controller; 5. a splitting module; 6. a power transmission switch; 61. rotating the electric shaft; 7. a grounding switch; 71. rotating the ground shaft; 8. an interlock module; 81. a gear; 82. a chute; 821. an abutting surface; 83. a clamping block; 831. a support block; 832. a rubber layer; 9. a self-locking module; 91. a fastener; 92. a drive member.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
Referring to fig. 1 and 2, the embodiment of the application discloses a safety protection system for a centrally installed switchgear, which includes a power transmission switch 6, a grounding switch 7, a work plate 1, an identification module 2, an information database 3, a detection module 4 and a branch module 5.
Referring to fig. 1 and 3, the power transmission switch 6 is arranged on the cabinet body of the centrally-mounted cabinet; when the power transmission switch 6 is closed, the middle cabinet transmits power; when the power transmission switch 6 is turned off, the middle cabinet does not transmit power. The grounding switch 7 is arranged on the cabinet body of the middle cabinet; when the grounding switch 7 is closed, the middle cabinet is grounded; when the grounding switch 7 is disconnected, the middle cabinet is not grounded.
Referring to fig. 2, the work card 1 is carried by a person, and the work card 1 stores the person information of the person, and the person information includes a work number, a name and the like;
the identification module 2 is arranged on the middle cabinet, when one or more persons stand in front of the middle cabinet, the identification module 2 reads the personnel information in the worker plate 1 on each person, and the identification module 2 sends all the personnel information to the information database 3 and the punishment module 5; if a plurality of personnel information exist, the identification module 2 sorts the personnel information from small to large according to the work number, and then sends all the personnel information to the information database 3 and the punishment module 5.
The information database 3 stores personal information of all personnel, the personal information includes personnel information and skill level, and the skill level is input and adjusted by a manager according to the actual situation of the personnel, such as: the apprentice is set to six, the primary electrician is set to five, and the intermediate electrician is set to four. The information database 3 receives all the personnel information sent by the identification module 2 and sends all the skill levels corresponding to the personnel information to the punishment module 5; if a plurality of skill levels exist, the information database 3 sorts the skill levels from small to large according to the job numbers, and then sends all the skill levels to the punishment module 5.
The detection module 4 is arranged on the middle cabinet and used for detecting whether a person operates by mistake, and when the person operates by mistake, the detection module 4 outputs a detection signal and sends the detection signal to the division module 5;
the punishment module 5 receives all the personnel information, all the skill levels and the detection signals, matches the personnel information with the skill levels according to the sequence, namely, the first personnel information is matched with the first skill level, the second personnel information is matched with the second skill level, punishment determination is generated according to the correspondence of the skill levels, and the personnel information, the skill levels and the punishment determination are in one-to-one correspondence; meanwhile, the higher the skill level, the more serious the punishment decision.
For example: when a person stands in front of the middle-placed cabinet and operates mistakenly, the identification module 2 identifies the information of the person in the work board 1 on the body of the person, the punishment module 5 receives the information of the person, the skill level and the detection signal, the punishment module 5 generates corresponding punishment decision according to the skill level of the person, and if the skill level of the person is five levels, punishment for serious warning is generated; and if the skill level of the personnel is four, generating a comment reporting place.
For another example: when the apprentice operates under its master's guidance, apprentice and master all stand before putting the cabinet in, 2 discernment of identification module apprentice and master worker in the worker tablet 1 personnel information, if the apprentice maloperation, punishment module 5 receives two personnel information, two skill levels and detected signal, punishment module 5 generates two punishment decisions that correspond according to two people's skill level, generates the warning punishment to the apprentice promptly, generates the punishment decision to master corresponding its skill level.
And in the branch decision, the method also can comprise the steps of re-accepting the safety training, re-accepting the operation specification training and the like. On one hand, the personnel are divided due to misoperation, and the teaching and training of the personnel are facilitated; on the other hand, the training is accepted again, the memory of the personnel on safe operation and correct operation is deepened, the probability of misoperation of the personnel is reduced, and the safety of the personnel and equipment is ensured.
Referring to fig. 2 and 4, the safety protection system of the centrally installed switchgear further comprises an interlock module 8 to prevent the earthing switch 7 from being closed in a charged state; preventing power transmission with ground.
Referring to fig. 3 and 4, the power transmission switch 6 is arranged ON the cabinet body of the middle cabinet, the power transmission switch 6 is provided with a rotary relay shaft 61, the power transmission switch 6 is provided with ON and OFF gears, the gear switching of the power transmission switch 6 is realized by rotating the rotary relay shaft 61, when the rotary relay shaft 61 is rotated to the ON gear, the power transmission switch 6 is in a closed state, and the middle cabinet transmits power; when the rotary power transmission shaft 61 is rotated to the OFF position, the power transmission switch 6 is in the OFF state, and the middle cabinet does not transmit power.
The grounding switch 7 is arranged on the cabinet body of the middle cabinet, the grounding switch 7 is provided with a rotary grounding shaft 71, the grounding switch 7 is provided with GND and a neutral gear, the gear switching of the grounding switch 7 is realized by rotating the rotary grounding shaft 71, and when the rotary grounding shaft 71 is rotated to the GND gear, the grounding switch 7 is in a closed state, and the middle cabinet is grounded; when the rotary grounding shaft 71 is rotated to a neutral position, the grounding switch 7 is in a disconnected state, and the middle cabinet is not grounded.
The rotary power transmission shaft 61 and the rotary grounding shaft 71 are connected with the cabinet body of the centrally installed cabinet in a rotating mode around the axes of the rotary power transmission shaft 61 and the rotary grounding shaft 71, and the rotary power transmission shaft 61 is parallel to the rotary grounding shaft 71. In this example, the rotation direction of the rotary power transmission shaft 61 from the ON position to the OFF position is clockwise, and the rotation direction of the rotary ground shaft 71 from the GND position to the neutral position is clockwise.
Referring to fig. 3 and 4, the interlock module 8 includes a gear 81, a ring gear, and a latch 83. The gear 81 is coaxially and fixedly connected with the rotary transmission electric shaft 61; the ring gear is coaxially rotated and sleeved on the periphery of the rotary grounding shaft 71, the ring gear is meshed with the gear 81, meanwhile, a ring groove can be arranged on the periphery of the rotary grounding shaft 71, and the ring gear is rotatably embedded in the ring groove to achieve axial fixation and circumferential rotation.
The gear ring is provided with a sliding groove 82, the sliding groove 82 extends along the circumferential direction of the gear ring, and a central angle corresponding to the sliding groove 82 is smaller than 360 degrees; the fixture block 83 is fixedly connected to the periphery of the rotary grounding shaft 71, the fixture block 83 is slidably embedded in the sliding groove 82, and when the rotary grounding shaft 71 is rotated to the GND position, the fixture block 83 is located at the grounding position; when the rotating ground shaft 71 is rotated to the neutral position, the latch 83 is located at the off position.
When the rotary electric transmission shaft 61 rotates to the OFF gear, the gear 81 is meshed with the gear ring to drive the sliding chute 82 to rotate to be overlapped at the grounding position and the disconnection position, at this time, the fixture block 83 can move to the grounding position or the disconnection position along the sliding chute 82, and further the rotary grounding shaft 71 can rotate to the GND or the idle gear, namely when the middle cabinet is not powered on, the grounding switch 7 can be freely closed or disconnected;
when the rotary electric transmission shaft 61 rotates to the ON gear, the sliding groove 82 rotates to only coincide with the off position, at this time, the sliding groove 82 blocks the fixture block 83 from moving to the grounding position, so that the rotary grounding shaft 71 cannot rotate to the GND gear, that is, when the middle cabinet is powered ON, the grounding switch 7 is prevented from being closed;
when the rotary power transmission shaft 61 rotates to the OFF position, the sliding groove 82 coincides with the grounding position and the disconnecting position, and the rotary grounding shaft 71 rotates to the GND position, the latch 83 is located at the grounding position, and the latch 83 is attached to a side wall of the sliding groove 82 along the circumferential direction of the rotary grounding shaft 71, the side wall is an abutting surface 821, at this time, the latch 83 is matched with the abutting surface 821 to limit the rotation of the gear ring, so as to limit the rotation of the gear ring 81 and the rotary power transmission shaft 61, namely, when the middle cabinet is grounded, the power transmission switch 6 is prevented from being closed.
Referring to fig. 2 and 4, the safety protection system of the centrally installed switchgear further includes a self-locking module 9, so as to lock the gear ring when the centrally installed switchgear is grounded or powered on.
The detection module 4 includes a pressure sensor 41 and a controller 42, and the pressure sensor 41 is disposed on the contact surface 821 of the sliding chute 82, and is used for detecting the pressing force of the fixture block 83 against the contact surface 821 and outputting a pressure signal, and the pressure signal increases with the increase of the pressing force; the controller 42 is coupled to the pressure sensor 41, receives the pressure signal, and outputs a control signal to the self-locking module 9 when the pressure signal is greater than 0.
The self-locking module 9 locks the ring gear in response to the control signal. The self-locking module 9 comprises a clamping piece 91 and a driving piece 92, the clamping piece 91 is connected with the cabinet body of the middle-placed cabinet in a sliding mode, and the clamping piece 91 is used for being inserted between two adjacent teeth on the gear ring to lock the gear ring; the driving member 92 is connected to the cabinet body of the centrally installed switchgear, and drives the engaging member 91 to abut against or disengage from the ring gear under the control of the controller 42.
In this embodiment, the retainer 91 slides in the radial direction of the ring gear, and the driving member 92 may be an air cylinder, an electric cylinder, or the like.
Referring to fig. 4 and 5, the latch 83 includes a supporting block 831 and a rubber layer 832, the supporting block 831 is fixedly connected to the outer circumference of the rotation grounding shaft 71, the supporting block 831 is rigid, the rubber layer 832 has elasticity, and the rubber layer 832 is wrapped around the outer circumference of the supporting block 831.
The sliding groove 82 is only overlapped at the disconnection position, the fixture block 83 is positioned at the disconnection position, and the fixture block 83 is attached to the contact surface 821 of the sliding groove 82; meanwhile, the controller 42 receives the pressure signal, and outputs a detection signal to the dividing module 5 when the pressure signal is greater than a preset value (the preset value is greater than 0).
If the personnel careless mistakes:
firstly, misoperation: in the grounding state, the power transmission switch 6 is closed, at this time, the grounding switch 7 is in the closed state, the fixture block 83 abuts against the abutting surface 821, if the person performs the operation of closing the power transmission switch 6, the person applies a torque to the rotary power transmission shaft 61, the rotary power transmission shaft 61 is about to rotate, that is, the rotary power transmission shaft 61 has a rotation trend, the torque is transmitted to the gear ring through the gear 81, so that the gear ring has the rotation trend, at this time, the chute 82 rotates along with the rotation of the gear ring, so that the extrusion force between the abutting surface 821 and the fixture block 83 is increased, the pressure signal output by the pressure sensor 41 is increased, when the pressure signal is greater than a preset value, it is determined that the person is operated by mistake, and the controller 42 sends a detection signal to the punishment module 5 to determine punishment generated by;
and (2) misoperation II: in the power transmission state, the grounding switch 7 is closed, at this time, if a person performs the operation of closing the grounding switch 7, the person applies a torque to the rotating grounding shaft 71 to rotate the rotating grounding shaft, the fixture block 83 rotates along with the rotation of the rotating grounding shaft, so that the extrusion force between the abutting surface 821 and the fixture block 83 is increased, the pressure signal is increased and is greater than the preset value, the person is judged to be in misoperation, and the controller 42 sends a detection signal to the punishment module 5 to determine the punishment generated by the misoperation person;
meanwhile, in the two operation processes, the pressure signal is always greater than 0, the clamping piece 91 abuts tightly and locks the gear ring, the grounding switch 7 is prevented from being closed in an electrified mode, and the grounding wire is prevented from being electrified.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a put cabinet safety protection system which characterized in that: the device comprises a power transmission switch (6), a grounding switch (7) and an interlocking module (8);
the interlocking module (8) locks the power transmission switch (6) when the grounding switch (7) is in a closed state, and enables the power transmission switch (6) to be in an open state;
the interlocking module (8) locks the grounding switch (7) when the power transmission switch (6) is in a closed state, and enables the grounding switch (7) to be in an open state;
when the grounding switch (7) is in a closed state, the middle cabinet is grounded; when the power transmission switch (6) is in a closed state, the middle-placed cabinet transmits power.
2. The centrally installed switchgear safety protection system according to claim 1, wherein: the grounding switch (7) has a rotating grounding shaft (71); the rotary grounding shaft (71) is rotatably connected with a cabinet body of the centrally installed cabinet around the axis of the rotary grounding shaft;
the interlocking module (8) comprises a gear ring and a clamping block (83);
the gear ring is coaxially and rotatably sleeved on the periphery of the rotary grounding shaft (71); a sliding groove (82) is further formed in the gear ring, the sliding groove (82) extends along the circumferential direction of the gear ring, and the central angle corresponding to the sliding groove (82) is smaller than 360 degrees;
the fixture block (83) is fixedly connected with the rotary grounding shaft (71), and one end of the fixture block (83) is embedded into the sliding groove (82) in a sliding manner; when the fixture block (83) rotates to the grounding position along with the rotating grounding shaft (71), the middle cabinet is grounded; when the fixture block (83) rotates to a disconnection position along with the rotating grounding shaft (71), the middle cabinet is not grounded;
when the power transmission switch (6) is in an off state, the sliding groove (82) is overlapped at a grounding position and an off position; when the power transmission switch (6) is in a closed state, the chute (82) is only overlapped at an open position.
3. The centrally installed switchgear safety protection system according to claim 2, wherein: the power transmission switch (6) is provided with a rotary power transmission shaft (61); the rotary transmission electric shaft (61) is rotatably connected with a cabinet body of the middle cabinet around the axis of the rotary transmission electric shaft, and the rotary transmission electric shaft (61) is parallel to the rotary grounding shaft (71);
the sliding groove (82) is overlapped at the grounding position and the disconnecting position, and when the clamping block (83) rotates to the grounding position along with the rotating grounding shaft (71), the clamping block (83) is attached to one side wall of the sliding groove (82) along the circumferential direction of the rotating grounding shaft (71);
the interlock module (8) further comprises a gear (81);
the gear (81) is coaxially and fixedly connected with the rotary electric transmission shaft (61); and the gear (81) engages the ring gear;
when the rotary transmission electric shaft (61) rotates to a state that the power transmission switch (6) is in an off state, the sliding chute (82) is driven to rotate to be overlapped at a grounding position and an off position through the gear (81) and the gear ring;
when the rotary power transmission shaft (61) rotates until the power transmission switch (6) is in a closed state, the sliding chute (82) is driven to rotate to only overlap an open position through the gear (81) and the gear ring.
4. The centrally installed switchgear safety protection system according to claim 2, wherein: also comprises a self-locking module (9); the self-locking module (9) comprises a clamping piece (91) and a driving piece (92);
the clamping piece (91) is connected with the cabinet body of the middle-placed cabinet in a sliding manner; one end of the clamping piece (91) is used for tightly abutting against the gear ring;
the driving piece (92) is connected with the cabinet body of the centrally installed cabinet;
when the grounding switch (7) is in a closed state or the power transmission switch (6) is in a closed state, the driving piece (92) drives the clamping piece (91) to tightly abut against the gear ring so as to limit the rotation of the gear ring;
when the grounding switch (7) is in an off state or the power transmission switch (6) is in an off state, the driving piece (92) drives the clamping piece (91) to be separated from the gear ring.
5. The centrally installed switchgear safety protection system according to claim 4, wherein: the sliding groove (82) is overlapped at a grounding position and a disconnecting position, when the clamping block (83) rotates to the grounding position along with the rotary grounding shaft (71), the clamping block (83) is attached to one side wall of the sliding groove (82) along the circumferential direction of the rotary grounding shaft (71), and the side wall is an abutting surface (821);
the sliding groove (82) is only overlapped at a disconnecting position, the fixture block (83) is located at the disconnecting position, and the fixture block (83) is attached to an abutting surface (821) of the sliding groove (82);
the safety protection system of the centrally installed switchgear further comprises a pressure sensor (41) and a controller (42);
the pressure sensor (41) is arranged on an abutting surface (821) of the sliding chute (82) and used for detecting the extrusion force of the fixture block (83) to the side wall of the sliding chute (82) and outputting a pressure signal, and the pressure signal is increased along with the increase of the extrusion force;
the controller (42) is coupled with the pressure sensor (41) and used for receiving a pressure signal, and the controller (42) is used for controlling the driving piece (92) to drive the clamping piece (91) to abut against the gear ring when the pressure signal is larger than 0.
6. The centrally installed switchgear safety protection system according to claim 1, wherein: the system also comprises an identification module (2), a detection module (4) and a punishment module (5);
the identification module (2) is arranged on the cabinet body of the middle-placed cabinet, identifies personnel information when the middle-placed cabinet is operated by personnel, and sends the personnel information to the branch module (5);
the detection module (4) is arranged on the cabinet body of the centrally installed switchgear and used for detecting whether a person operates in error or not and outputting a detection signal when the person operates in error;
the punishment module (5) is coupled with the detection module (4) and used for receiving the personnel information and the detection signal and generating punishment decision.
7. The centrally installed switchgear safety protection system according to claim 6, wherein: further comprising an information database (3);
personal information is stored in the information database (3), and the personal information comprises personnel information and skill levels;
the identification module (2) identifies personnel information and sends the personnel information to the punishment module (5) and the information database (3);
the information database (3) receives personnel information and sends a corresponding skill level to a punishment module (5);
the punishment module (5) receives the personnel information, the skill level and the detection signal, and generates punishment determination according to the skill level, wherein the punishment determination is more serious when the skill level is higher.
8. The centrally installed switchgear safety protection system according to claim 7, wherein: the system also comprises a safety module;
the security module is coupled with the identification module (2) and the information database (3);
the identification module (2) identifies one or more pieces of personnel information on the peripheral side of the centrally installed switchgear and sends all the personnel information to the information database (3);
the information database (3) receives one or more personnel information and sends all corresponding skill levels to the security module;
the safety module receives all skill levels and compares the received skill levels with a preset level;
if all skill levels are lower than the preset level, the safety module controls the interlocking module (8) to lock; and if at least one skill level is equal to or higher than a preset level, the safety module controls the interlocking module (8) to work normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110083059.1A CN112928625B (en) | 2021-01-21 | 2021-01-21 | Safety protection system for centrally installed switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110083059.1A CN112928625B (en) | 2021-01-21 | 2021-01-21 | Safety protection system for centrally installed switchgear |
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| CN112928625A true CN112928625A (en) | 2021-06-08 |
| CN112928625B CN112928625B (en) | 2022-08-23 |
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| CN108630483A (en) * | 2018-06-28 | 2018-10-09 | 董佃平 | A kind of five anti-interlocking operation mechanisms of middle-high voltage switch |
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| WO1996018200A1 (en) * | 1994-12-05 | 1996-06-13 | Siemens Aktiengesellschaft | Three-position disconnector for medium-voltage switchgear |
| JP2006081267A (en) * | 2004-09-08 | 2006-03-23 | Mitsubishi Electric Corp | Interlock device of closed distribution board |
| CN101882518A (en) * | 2009-05-04 | 2010-11-10 | 西门子公司 | The device that is used for mutual locking of two switches, especially circuit breaker |
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|---|---|
| CN112928625B (en) | 2022-08-23 |
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