CN112700992A - Novel lower door interlocking device - Google Patents
Novel lower door interlocking device Download PDFInfo
- Publication number
- CN112700992A CN112700992A CN201911009229.0A CN201911009229A CN112700992A CN 112700992 A CN112700992 A CN 112700992A CN 201911009229 A CN201911009229 A CN 201911009229A CN 112700992 A CN112700992 A CN 112700992A
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- China
- Prior art keywords
- lower door
- brake cable
- plate
- main switch
- grounding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a novel lower door interlocking device which comprises a lower door and main switch interlocking assembly and a lower door and grounding switch interlocking assembly, wherein the lower door and main switch interlocking assembly comprises a lower door lock plate, a shifting piece, a shaft, a tension spring, a connecting rod, a microswitch, a brake cable II, a brake cable fixing frame, a main switch mechanism operation hole blocking piece, a microswitch mounting plate and a fixing plate; the lower door and grounding switch interlocking assembly comprises a lower door lock plate, a stop pin, a slide block, a guide rail, a brake cable fixing frame, a brake cable I, a brake cable fixing piece, a mechanism grounding operation connecting plate and a fixing plate; the five-prevention interlocking is flexibly realized by adopting a connecting rod principle, a sliding block stop pin linked with a mechanism and a lower door lock plate arranged on a lower door; the whole device has simple structure, reliability, flexibility, convenient operation and low cost, and ensures the safety of operators; but also meets the requirement of protection grade.
Description
Technical Field
The invention relates to the technical field of power supply safety of a ring main unit, in particular to a lower door interlocking device of the ring main unit.
Background
The prevention of electrical misoperation is the main content of electrical professional management, and electrical misoperation events are usually accompanied by accidents such as equipment accident tripping, fault range expansion, equipment damage, even personal injury and the like, so modern electrical protection has great importance on electrical five-prevention. The electrical operation must strictly perform "five prevention": 1. the circuit breaker is prevented from being mistakenly opened and closed; 2. prevent the false entering into the electrified interval; 3. the isolating switch is prevented from being switched on and off under load; 4. preventing the main switch from being combined with a ground knife or a ground wire; 5. prevent to hang the earth wire or close the earthing knife-switch with electricity. Reliable and flexible interlocking is a prerequisite for realizing five prevention.
Most of the existing mechanisms have certain unreliable factors in their design:
1) the blocking pin of the door interlock is easy to be jammed in the process of moving (closing) in the door chute;
2) the upper edge of the door is provided with a 3-4 mm gap by means of edge folding processing, and the requirement of the protection level cannot be met.
These problems are easy to cause the failure of the door interlock, which leads to the failure of five-prevention, safety accidents and economic loss, with serious consequences.
Disclosure of Invention
The invention aims to provide a novel lower door interlocking.
The purpose of the invention is realized by the following technical scheme.
The novel lower door interlocking device comprises a lower door and main switch interlocking assembly and a lower door and grounding switch interlocking assembly.
The lower door and main switch interlocking assembly comprises a lower door lock plate, a shifting piece, a shaft, a tension spring, a connecting rod, a microswitch, a brake cable II, a brake cable fixing frame, a main switch mechanism operation hole blocking piece, a microswitch mounting plate and a fixing plate.
The lower door and grounding switch interlocking assembly comprises a lower door lock plate, a stop pin, a sliding block, a guide rail, a brake cable fixing frame, a brake cable I, a brake cable fixing piece, a mechanism grounding operation connecting plate and a fixing plate.
Two ends of the brake cable I are respectively and fixedly connected with the sliding block and the mechanism grounding operation connecting plate, and the sliding block, the brake cable I and the mechanism grounding operation connecting plate are linked.
One end of the brake cable II is fixedly connected with the connecting rod through a locking nut, the other end of the brake cable II is fixedly connected with the main switch mechanism operation hole separation blade through a brake cable fixing part, and the connecting rod, the brake cable II and the main switch mechanism operation hole separation blade are linked.
The shifting sheet is bent in an L shape at a certain angle and is provided with an upper bent edge and a lower bent edge.
The sliding block and the stop pin are fixedly connected into a whole and can slide left and right between the guide rail rectangular grooves.
Lower door lock plate sets up arch and spacing groove, the arch is the rectangle, also can be trapezoidal, other shapes such as polygon, and its position is corresponding with plectrum lower bend limit position, the spacing groove sets up to the rectangular channel, and the notch is equipped with the chute of certain angle.
According to the technical scheme, the novel lower door interlocking device provided by the invention adopts a connecting rod principle and a sliding block stop pin linked with a mechanism to flexibly realize five-prevention interlocking with a lower door locking plate arranged on a lower door; the whole device has simple structure, reliability, flexibility, convenient operation and low cost, and ensures the safety of operators; but also meets the requirement of protection grade.
Drawings
FIG. 1 is a schematic view of an integral interlock arrangement;
FIG. 2 is a schematic view of the positions of the pick, the connecting rod and the microswitch;
FIG. 3 is a schematic view of the positions of the slider, the stop pin, and the guide rail;
FIG. 4 is a schematic view of a paddle;
FIG. 5 is a schematic view of the lower door latch plate;
FIG. 6 is a schematic diagram showing the closing state and the opening state of the lower door of the grounding switch;
fig. 7 is a schematic diagram showing the closing state of the lower door and the opening state of the grounding switch.
In the figure: 1. a shaft; 2. a shifting sheet; 3. a guide rail; 4. a stop pin; 5. a slider; 6. a second brake cable; 7. a brake cable I; 8. a brake cable fixing frame; 9. locking the nut; 10. a connecting rod; 11. a microswitch; 12. a microswitch mounting plate; 13. a fixing plate; 14. a top plate; 15. a lower door; 16. a tension spring; 17. a lower door lock plate; 18. a main switch mechanism operation hole baffle sheet; 19. a brake cable fixing member; 20. a mechanism grounding operation connecting plate; 21. the lower door and the main switch interlocking component; 22. the lower door and the grounding switch are interlocked.
Detailed Description
In order to make the purpose, technical scheme and advantages of the invention more clearly understood, the ring main unit lower door interlocking device of the invention is further described in detail with reference to the accompanying drawings and embodiments; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the lower door interlock of the present invention includes a lower door and main switch interlock 21 and a lower door and ground switch interlock 22.
The lower door and main switch interlocking component 21 comprises a lower door lock plate 17, a shifting piece 2, a shaft 1, a tension spring 16, a connecting rod 10, a microswitch 11, a brake cable II 6, a brake cable fixing frame 8, a main switch mechanism operation hole blocking piece 18, a microswitch mounting plate 12 and a fixing plate 13.
The lower door and grounding switch interlocking component 22 comprises a lower door lock plate 17, a stop pin 4, a sliding block 5, a guide rail 3, a brake cable fixing frame 8, a brake cable I7, a brake cable fixing piece 19, a mechanism grounding operation connecting plate 20 and a fixing plate 13.
Two ends of the brake cable II 6 are respectively fixedly connected with the connecting rod 10 and the main switch mechanism operation hole blocking piece 18, and the connecting rod 10, the brake cable II 6 and the main switch mechanism operation hole blocking piece 18 are linked.
Two ends of the first brake cable 7 are fixedly connected with the sliding block 5 and the mechanism grounding operation connecting plate 20 respectively, and the sliding block 5, the first brake cable 7 and the mechanism grounding operation connecting plate 20 are linked.
The shifting piece 2 is bent in an L shape at a certain angle and is provided with an upper bent edge and a lower bent edge.
The sliding block 5 and the stop pin 4 are connected and fixed into a whole and can slide between the rectangular grooves of the guide rail 3.
Lower door lock plate 17 sets up arch and spacing groove, the arch is the rectangle, also can be trapezoidal, other shapes such as polygon, and its position is corresponding with plectrum lower bend limit position, the spacing groove sets up to the rectangular channel, and the notch is equipped with the chute of certain angle.
Specific examples are as follows.
The lower door interlock device of the present invention, as shown in fig. 1, includes a lower door and main switch interlock assembly 21, and a lower door and ground switch interlock assembly 22.
As shown in fig. 1, the lower door and main switch interlocking assembly 21 includes a lower door lock plate 17, a dial 2, a shaft 1, a tension spring 16, a connecting rod 10, a microswitch 11, a brake cable II 6, a brake cable fixing frame 8, a main switch mechanism operating hole baffle 18, a microswitch mounting plate 12 and a fixing plate 13.
As shown in fig. 1, the lower door and ground switch interlock assembly 22 includes a lower door lock plate 17, a stop pin 4, a slider 5, a guide rail 3, a brake cable fixing bracket 8, a brake cable i 7, a brake cable fixing bracket 19, a mechanism ground operation link plate 20, and a fixing plate 13.
As shown in fig. 1, one end of the brake cable II 6 is connected with the connecting rod 10 through a locking nut, and the other end of the brake cable II is connected with the main switch mechanism operation hole blocking piece 18 through a locking nut; as shown in fig. 2 and 4, the plectrum 2, the shaft 1 and the connecting rod 10 are fixed and connected through a square shaft with a square hole, a threaded fastener and the like, so that the integral linkage function of the lower door and the main switch interlocking component 21 is ensured; as shown in fig. 6 and 7, two ends of the tension spring 16 are respectively fixed on the brake cable fixing frame 8 and the connecting rod 10, and store energy under the driving of the connecting rod when the door is closed, and automatically release energy when the door is opened.
As shown in fig. 1, one end of the brake cable I7 is connected with the sliding block 5 through a locking nut, and the other end of the brake cable I is connected with a mechanism grounding operation connecting plate 20 through a brake cable fixing piece 19; as shown in fig. 3, the sliding block 5 and the stop pin 4 are fixed into a whole by screwing and can slide between the rectangular grooves of the guide rail 3 left and right, so as to ensure the realization of the integral linkage function of the lower door and the earthing switch interlocking component 22.
As shown in fig. 4, the shifting piece 2 is set to be an L-shaped bend with a certain angle and is provided with an upper bent edge, a lower bent edge and a square hole, the shifting piece 2 rotates clockwise to the lower bent edge of the top plate 14 for limiting when the upper bent edge realizes opening the lower door 15, and the lower bent edge realizes effective contact with the protrusion of the lower door lock plate 17 when closing the lower door 15, so that power is transmitted. As shown in fig. 5, the lower door lock plate 17 is provided with a protrusion and a limiting groove, the protrusion position corresponds to the lower bent edge position of the shifting piece 2, the limiting groove is a rectangular groove, and the notch is provided with a chamfer so that the stop pin 4 can smoothly enter or exit the limiting groove, thereby realizing the function of opening and locking the lower door 15 by matching with the stop pin 4.
The fixed plate 13 is connected with the top plate 14 through bolts, the top plate 14 is connected with the lower unit through bolts, and the microswitch 11 is connected with the microswitch mounting plate 12 through bolts.
The size of the stop pin 4 is matched with the size of the limit groove of the lower door lock plate 17.
The interlocking principle is described below.
When the grounding switch is switched on, the brake cable I7 is driven by the mechanism grounding operation connecting plate 20 to move rightwards, so that the sliding block 5 drives the stop pin 4 to move rightwards into the notch of the lower door locking plate 17, the door is unlocked, and the aim of opening the lower door 15 is fulfilled; when the grounding switch is opened, the first brake cable 7 is driven by the mechanism grounding operation connecting plate 20 to move leftwards, so that the sliding block 5 drives the stop pin 4 to move leftwards to the transverse groove of the limiting groove of the lower door lock plate 17, the door is locked, and the aim that the lower door 15 cannot be opened is fulfilled. Therefore, the interlocking function of the lower door and the grounding switch is realized, wherein the grounding switch is switched on, the lower door 15 can be opened, and the grounding switch is switched off, and the lower door 15 cannot be opened.
When the grounding switch is switched on and the lower door 15 is opened, the lower door lock plate 17 protrudes to be far away from the plectrum 2, the plectrum 2 rotates clockwise, the connecting rod 10 also rotates clockwise, the movable contact of the microswitch 11 is driven to be separated into a disconnected state, a main switch switching-on loop is locked, and the purpose that the main switch cannot be electrically switched on when the grounding switch is switched on and the lower door 15 is opened is achieved; meanwhile, when the grounding switch is switched on and the lower door 15 is opened, the brake cable II 6 moves rightwards along with the clockwise rotation of the connecting rod 10 by the plectrum 2, and drives the main switch mechanism operation hole blocking piece 18 to move to block the main switch mechanism operation hole, so that the aim that the main switch cannot be switched on manually when the grounding switch is switched on and the lower door 15 is opened is fulfilled. Therefore, the interlocking function of the lower door and the main switch, which can not be switched on by the main switch, is realized when the grounding switch is switched on and the lower door 15 is opened.
When the lower door 15 is closed and the grounding switch is opened, the protrusion of the lower door lock plate 17 pushes against the moving shaft 1 at the lower bent side of the poking piece 2 to rotate anticlockwise, so that the connecting rod 10 rotates anticlockwise to press the moving contact piece of the microswitch 11 to enable the moving contact piece to be in a closed conducting state, and the purpose of electric unlocking, namely electric switching-on of the main switch can be realized; meanwhile, when the lower door 15 is closed and the grounding switch is opened, the brake cable II 6 moves leftwards under the drive of the anticlockwise rotation of the plectrum 2 along with the connecting rod 10, and drives the main switch mechanism operation hole blocking piece 18 to move to open the main switch mechanism operation hole, so that the purpose that the main switch can be manually closed when the lower door 15 is closed and the grounding switch is opened is achieved. Therefore, the interlocking function of the lower door and the main switch, which can be switched on by the main switch, is realized when the lower door 15 is closed and the grounding switch is switched off.
The operation steps of the lower door interlocking device of the invention are as follows:
1. when the ring main unit operates normally: the lower door 15 is in a closed state and the earthing switch is in an open position. At the moment, the protrusion on the lower door lock plate 17 extrudes the shifting piece 2 to bend downwards and turn around the moving shaft 1 anticlockwise, so that the connecting rod 10 moves leftwards, the moving contact piece of the microswitch 11 is pressed, the control circuit of the main switch is conducted, and the main switch can be switched on and off electrically; meanwhile, the tension spring 16 is in a stretched energy storage state, the connecting rod 10 drives the brake cable II 6 to move leftwards, the stop piece 18 of the operation hole of the main switch mechanism is driven to move, the operation hole of the main switch mechanism is opened, and at the moment, the main switch can be manually switched on and switched off;
2. when needing to overhaul the looped netowrk cabinet: the main switch is first opened and then the grounding switch is closed. The first brake cable 7 is driven by the mechanism grounding operation connecting plate 20 to move rightwards, so that the sliding block 5 drives the stop pin 4 to move rightwards into the outlet groove of the lower door lock plate 17, and the lower door 15 can be opened; after the lower door 15 is opened, the protrusion on the lower door lock plate 17 does not press the plectrum 2 any more, under the action of energy released by the tension spring 16, the plectrum 2, the shaft 1 and the connecting rod 10 rotate clockwise, the movable contact of the microswitch 11 resets, the microswitch 11 is in a power-off state, so that the control circuit of the main switch is powered off, and at the moment, the main switch cannot be switched on electrically; meanwhile, under the action of energy released by the tension spring 16, the connecting rod 10 drives the brake cable II 6 to move rightwards, so as to drive the main switch mechanism operation hole blocking piece 18 to move, so that the main switch mechanism operation hole is blocked, the main switch cannot be manually switched on, and the ring main unit is in an overhauling state after the door is opened;
3. when the ring main unit finishes power transmission after overhaul: the door 15 is closed and the earth switch is tapped. At the moment, the protrusion on the lower door lock plate 17 extrudes the shifting piece 2 to bend downwards and turn around the moving shaft 1 anticlockwise, so that the connecting rod 10 rotates anticlockwise, the moving contact piece of the microswitch 11 is pressed, the control circuit of the main switch is conducted, and the main switch can be switched on and off electrically; meanwhile, the tension spring 16 is in a stretched energy storage state, the connecting rod 10 drives the brake cable II 6 to move leftwards, the stop piece 18 of the operation hole of the main switch mechanism is driven to move, the operation hole of the main switch mechanism is opened, and at the moment, the main switch can be manually switched on and switched off. The first brake cable 7 is driven by the mechanism grounding operation connecting plate 20 to move leftwards to drive the slide block 5 to move leftwards, so that the stop pin 4 moves leftwards to the transverse groove of the limiting groove of the lower door lock plate 17, the lower door 15 is locked and cannot be opened, and the closing of the door is finished.
Through the operation procedures, the situation that the worker mistakenly enters the electrified interval can be avoided.
The invention has the beneficial effects that:
1. the connecting rod principle is adopted, the poking sheet is utilized to drive the shaft to rotate, and the shaft drives the upper connecting rod to rotate, so that five-prevention interlocking is flexibly realized;
2. the device has the advantages of simple structure, convenient operation and low cost, prevents mistaken entering of the electrified interval and power transmission with the grounding wire, ensures the safety of operators, has high universality and adapts to market requirements;
3. this interlocking plectrum can not lead to the dislocation because of the frequency of use is high with the backing pin, makes whole device stability higher, and the security is better.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A novel lower door interlocking device comprises a lower door (15) and a main unlocking associated lock assembly (21), and a lower door (15) and a grounding switch interlocking assembly (22), and is characterized in that the lower door (15) and the main unlocking associated lock assembly (21) comprise a lower door lock plate (17), a shifting piece (2), a shaft (1), a connecting rod (10), a microswitch (11), a tension spring (16), a brake cable II (6), a brake cable fixing frame (8), a main switch mechanism operating hole blocking piece (18), a microswitch mounting plate (12) and a fixing plate (13); the lower door (15) and grounding switch interlocking assembly (22) comprises a lower door lock plate (17), a stop pin (4), a sliding block (5), a guide rail (3), a brake cable fixing frame (8), a brake cable I (7), a brake cable fixing piece (19), a mechanism grounding operation connecting plate (20) and a fixing plate (13).
2. A novel lower door interlocking device as claimed in claim 1, wherein one end of the second brake cable (6) is fixedly connected with the connecting rod (10) through a locking nut (9), the other end of the second brake cable is fixedly connected with the main switch mechanism operation hole blocking piece (18), and the connecting rod (10), the second brake cable (6) and the main switch mechanism operation hole blocking piece (18) are interlocked.
3. A novel lower door interlocking device as claimed in claim 1, characterized in that one end of the first brake cable (7) is fixedly connected with the sliding block (5) through a locking nut (9), the other end of the first brake cable is fixedly connected with the mechanism grounding operation connecting plate (20) through a brake cable fixing part (19), and the sliding block (5), the first brake cable (7) and the mechanism grounding operation connecting plate (20) are interlocked.
4. A novel lower door interlocking device as claimed in claim 1, characterized in that the sliding block (5) and the stop pin (4) are connected and fixed into a whole and can slide between the rectangular grooves of the guide rail (3) from side to side.
5. A new lower door interlocking device according to claim 1, characterized in that said pick (2) is provided with an angled L-bend and with upper and lower bent edges.
6. A novel lower door interlocking device according to claim 1, characterized in that the lower door lock plate (17) is provided with a protrusion and a limiting groove, the protrusion is rectangular, trapezoidal, polygonal or other shapes, and the position of the protrusion corresponds to the position of the lower bent edge of the pulling piece (2), the limiting groove is provided as a rectangular groove, and the notch is provided with an angled chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911009229.0A CN112700992A (en) | 2019-10-23 | 2019-10-23 | Novel lower door interlocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911009229.0A CN112700992A (en) | 2019-10-23 | 2019-10-23 | Novel lower door interlocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112700992A true CN112700992A (en) | 2021-04-23 |
Family
ID=75504954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911009229.0A Pending CN112700992A (en) | 2019-10-23 | 2019-10-23 | Novel lower door interlocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112700992A (en) |
-
2019
- 2019-10-23 CN CN201911009229.0A patent/CN112700992A/en active Pending
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