CN113345770B - Circuit breaker protector and junction box thereof - Google Patents
Circuit breaker protector and junction box thereof Download PDFInfo
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- CN113345770B CN113345770B CN202110753482.8A CN202110753482A CN113345770B CN 113345770 B CN113345770 B CN 113345770B CN 202110753482 A CN202110753482 A CN 202110753482A CN 113345770 B CN113345770 B CN 113345770B
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- circuit breaker
- circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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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
- H01H9/52—Cooling of switch parts
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Abstract
The invention discloses a circuit breaker protector and a junction box thereof, and mainly relates to the field of circuit breakers. The circuit breaker comprises a circuit breaker and a junction box matched with the circuit breaker; a sealing gasket is arranged on the periphery of the wire placing cavity shell, and the wiring ports on the upper side and the lower side of the circuit breaker are positioned on the rear side of the wire placing cavity shell; an acid gas drying agent is arranged in the waist-shaped groove; semiconductor thermoelectric refrigerating sheets are respectively arranged in the wire placing cavity and the inner cavity of the circuit breaker; and an electrochemical gas sensor is also arranged in the inner cavity of the circuit breaker. And a poor grounding early warning protection device is arranged in the circuit breaker. The invention has the beneficial effects that: the circuit breaker is well suitable for a production workshop in a strong acid environment, the wiring port of the circuit breaker can be well dampproof and anticorrosive, and the circuit breaker can be used for internal heat dissipation of the circuit breaker in a novel mode; the poor ground early warning protector can not only continue to keep safe operation, avoid causing the accident under the bad condition of ground connection, can carry out the bad early warning of ground connection moreover, carries out follow-up maintenance.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a circuit breaker protector and a junction box thereof.
Background
Generally, enterprises with high air pollution and high requirements on environmental protection generally produce places in suburbs, particularly chemical plants. For a production workshop in a strong acid environment, the existing circuit breaker wiring port is exposed and is easy to be corroded and damaged by the environment to cause accidents, so the design of moisture prevention and corrosion prevention of the circuit breaker is also important. Because the circuit breaker can not be cooled by a fan cooling mode any more when the air in a production workshop in a strong acid environment is diffused with acid gas, the air flow in the fan cooling mode can quickly aggravate corrosion, and a new cooling mode is needed to solve the problem of internal cooling.
In addition, outdoor mouse is more and generally all obtain relatively easy factory and ann at the object, and mouse just has sharp tooth, if the wiring cabinet forgets to close or close not tight, can bite the interior thick circuit insulation protective layer of broken connection cabinet, moreover when crawling because of its tail is long, the health crosses between two phases of switch, can make the alternate short circuit of circuit breaker and cause the switch trip to cause the power failure accident of great area. Because the interior wiring cabinet of factory is interior to control a plurality of circuit breakers of different equipment and often opens and shuts, so the workman can not lock the wiring cabinet door under the many conditions, so close untight phenomenon appears in the market when closing, so if can improve on the circuit breaker and avoid appearing above-mentioned problem best.
Still be exactly, present electric power cabinet generally does not have the bad early warning protector of ground connection, and the bad ground connection can make between power cord and the ground voltage rise and take place the electric leakage and will make the shell electrified, causes the injury to personal safety during the touching, also can influence the normal operating safety of equipment equally.
Disclosure of Invention
The invention aims to provide a circuit breaker protector and a junction box thereof, which can be well suitable for a production workshop in a strong acid environment, and the wiring port of a circuit breaker can be well dampproof and anticorrosive and can warn the entering of acid gas; the circuit breaker can be used for internal heat dissipation in a novel mode; the thick circuit insulation protective layer in the wiring cabinet can be prevented from being broken by the biting of rats, and the tripping of the switch caused by the interphase short circuit of the circuit breaker can also be avoided; this device still sets up the bad early warning protector of ground connection between power cord and the ground, can not only continue to keep safe operation, avoid arousing the accident under the bad condition of ground connection, can carry out the bad early warning of ground connection moreover, carries out follow-up maintenance. Meanwhile, the effectiveness of the bad grounding early warning protection device can be early warned, and the failed bad grounding early warning protection device can be replaced conveniently.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a circuit breaker protector and a junction box thereof comprise a circuit breaker and a junction box matched with the circuit breaker; the wire placing cavity is formed in the upper end and the lower end of the rear side of the circuit breaker, the sealing washer is arranged on the periphery of the shell of the wire placing cavity, the wiring ports on the upper side and the lower side of the circuit breaker are located on the rear side of the shell of the wire placing cavity, a rectangular groove matched with the shell of the wire placing cavity is formed in the wiring box, and wiring is placed in the rectangular groove through the wiring ports; waist-shaped grooves are formed in the upper end and the lower end of the circuit breaker, the innermost ends of the waist-shaped grooves are communicated with the wire placing cavity and the inner cavity of the circuit breaker through holes, and acid gas drying agents are arranged in the waist-shaped grooves; semiconductor thermoelectric refrigerating sheets are respectively arranged in the wire placing cavity and the inner cavity of the circuit breaker and are respectively used for refrigerating and radiating the wire connecting port and the inner cavity of the circuit breaker; and an electrochemical gas sensor is also arranged in the inner cavity of the breaker.
Be equipped with the bad early warning protector of ground connection in the circuit breaker, the bad early warning protector of ground connection includes piezo-resistor, piezo-resistor sets up between power cord and earth connection.
The piezoresistor is arranged in a resistor box body, a piezoresistor working display lamp is further arranged in the sub-cavity on the upper side of the resistor box body, and the piezoresistor working display lamp is arranged on a circuit between the input end and the output end of the piezoresistor.
A piezoresistor failure alarm device is also arranged in the sub-cavity at the upper side of the resistor box body; the piezoresistor failure alarm device comprises a failure alarm independent circuit, a fusing elastic sheet, a spring and a rotary switch sheet; the failure alarm independent circuit comprises two circuit connection copper sheets and a failure alarm lamp powered by an independent power supply, one end of each of the two circuit connection copper sheets is connected with the failure alarm lamp, and the other end of one of the circuit connection copper sheets is provided with an electric connection bump end; one end of the fusing elastic sheet is rotatably connected to a first convex column in the branch chamber, the other end of the fusing elastic sheet is connected with the spring, the other end of the spring is fixed to a second convex column in the branch chamber, one end, close to the spring, of the fusing elastic sheet is welded and fixed to the bottom surface of the branch chamber through low-temperature soldering iron soldering tin, the connecting end of the piezoresistor is connected with the fusing elastic sheet through a power connecting wire to form a passage, one end of the rotary switch sheet is rotatably connected to a third convex column in the branch chamber through a torsion spring, a triangular pressing projection is arranged on the rotary switch sheet, one circuit connecting copper sheet can be pressed under the action of the triangular pressing projection to be in contact with the power connecting convex point end of the other circuit connecting copper sheet, and therefore an independent failure alarm circuit is communicated.
The sub-cavity is provided with limiting sheet grooves for limiting two circuit connection copper sheets, and the sub-cavity is also provided with a normal state limiting lug and an invalid state limiting lug for limiting the rotary switch sheet, and the normal state limiting lug is matched with a limiting groove on the rotary switch sheet.
The circuit breaker is characterized in that a connecting plate is arranged on the rear side of the circuit breaker, a guide post is arranged on the connecting plate, a fixing stud is arranged in the center of the rear side of the circuit breaker, a servo motor in transmission connection with the fixing stud is arranged in an inner cavity of the circuit breaker, and the servo motor drives the fixing stud to rotate forwards and reversely; the box cavity of the junction box is provided with a guide hole corresponding to the guide post and a threaded hole in threaded connection with the fixing stud, and the servo motor drives the fixing stud to rotate and be in threaded connection with the threaded hole so as to fix the circuit breaker into the junction box.
The circuit breaker rear side face is the heating panel, be equipped with the crack space between heating panel and the connecting plate, also set up the acid gas drier in the crack space.
The wiring port comprises a fixed column and an elastic telescopic column, and a wiring seat of the wiring port is positioned on the outer side of the elastic telescopic column; the wire connection box is characterized in that a through hole corresponding to the wire connection port is formed in the bottom of the rectangular groove, a positioning column is connected onto the through hole in a sliding mode, the positioning column is located on the rear side of the wire connection box and is arranged in the wire connection box groove in the wall body, the inner diameter of the positioning column is larger than that of the wire connection port, and a wire body connected with the wire connection base penetrates through the through hole in the tail end of the positioning column and is arranged in the positioning column.
And two ends of the positioning column are provided with limiting flanges.
And a breaker switch, a refrigeration sheet working switch, an acid gas concentration alarm display screen and a motor switch are arranged on the outer side of the breaker.
Compared with the prior art, the invention has the beneficial effects that:
in the structure of the circuit breaker and the junction box, the ports of the junction boxes can be sealed and sealed without leakage, a thick line insulation protective layer in a junction cabinet can be prevented from being broken by a mouse, and the tripping of a switch caused by the interphase short circuit of the circuit breaker can also be avoided; the port of the wiring board is sealed and sealed without leakage, and the acid gas drying agents are arranged at the positions of the waist-shaped groove and the ventilation channel of the heat dissipation plate to prevent the acid gas from entering the inner cavity, so that the moisture and corrosion can be well prevented; and the electrochemical gas sensor can monitor the concentration of the acid gas in real time, so that the entry of the acid gas can be early warned, and the electrochemical gas sensor is well suitable for a strong acid environment production workshop.
And can adopt the mode of neotype semiconductor thermoelectric refrigeration piece to be used for the inside heat dissipation of circuit breaker, dispel the heat to inside under the prerequisite that greatly reduced air flows.
Above all, this device still sets up the bad early warning protector of ground connection between power cord and ground, and the piezo-resistor that sets up in the bad early warning protector of ground connection uses, can continue to keep safe operation, avoid arousing the accident under the bad circumstances of ground connection, and the piezo-resistor work shows that the lamp is bright just shows that piezo-resistor has been worked moreover to release the bad phenomenon of ground connection and produce, thereby carry out the bad early warning of ground connection, carry out follow-up maintenance. Meanwhile, the piezoresistor failure alarm device can also perform early warning on the effectiveness of the piezoresistor of the grounding failure early warning protection device, and the failure alarm lamp shows that the piezoresistor fails after being turned off, so that the replacement of the failed grounding failure early warning protection device is facilitated.
Drawings
Figure 1 is a schematic diagram of the explosive structure of the present invention.
Fig. 2 is a schematic diagram of the circuit breaker of the present invention.
Fig. 3 is a schematic diagram of the circuit breaker of the present invention.
FIG. 4 is a schematic view of the positioning post of the present invention disposed outside the junction box.
FIG. 5 is a schematic view of the positioning post of the present invention disposed inside the junction box.
FIG. 6 is a schematic view of the positioning post of the present invention positioned outside the junction box.
Fig. 7 is a schematic diagram of a resistor cartridge according to the present invention.
FIG. 8 is a schematic diagram of the structure of the upper side chamber of the resistor box in the case of the non-failure state of the varistor of the present invention.
FIG. 9 is a schematic view of the structure of the upper side chamber of the resistor case in the failure state of the varistor of the present invention.
The reference numbers shown in the figures:
1. a circuit breaker; 2. a junction box; 3. a wire placing cavity; 4. a sealing gasket; 5. a wiring port; 6. a rectangular groove; 7. a waist-shaped groove; 8. a resistor case; 9. dividing a chamber; 10. a piezoresistor working display lamp; 11. an access end; 12. an output end; 13. fusing the elastic sheet; 14. a spring; 15. rotating the switch sheet; 16. a circuit connection copper sheet; 17. a failure warning lamp; 18. connecting an electric bump end; 19. a first convex column; 20. a second convex column; 21. connecting a power lead; 22. a third convex column; 23. embossing the triangle; 24. a limiting sheet groove; 25. a normal state limit bump; 26. a limit bump in a failure state; 27. a limiting groove; 28. a connecting plate; 29. a guide post; 30. fixing the stud; 31. a guide hole; 32. a threaded hole; 33. a heat dissipation plate; 34. plate seam gaps; 35. Fixing a column; 36. an elastic telescopic column; 37. a wire holder; 38. a positioning column; 39. a limiting flange; 40. a circuit breaker switch; 41. a refrigerating sheet working switch; 42. an acid gas concentration alarm display screen; 43. a motor switch; 44. fixing the lug; 45. a protective dust filter screen.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The invention relates to a circuit breaker protector and a junction box thereof, and as shown in the attached figure 1 of the specification, the main structure comprises a circuit breaker 1 and a junction box 2 matched with the circuit breaker 1.
Prominent core design points one:
as shown in fig. 1 and fig. 2 of the attached drawings, a wire placing cavity 3 is arranged at the upper end and the lower end of the rear side of the circuit breaker 1, and the wire placing cavity 3 is used for placing internal wiring connected with a wiring port 5.
The wiring ports 5 on the upper side and the lower side of the circuit breaker 1 are positioned on the rear side of the shell of the wiring cavity 3, the wiring ports 5 comprise fixed columns 35 and elastic telescopic columns 36, and wiring bases 37 of the wiring ports 5 are positioned on the outer sides of the elastic telescopic columns 36; the flexible nature of the post 36 is intended to reduce damage to the connection port 5 caused by pulling of the connection port 5 from the external connection during maintenance. In addition, as shown in the attached drawings of the specification, fig. 4, fig. 5 and fig. 6, a rectangular groove 6 matched with the shell of the wire placing cavity 3 is formed in the junction box 2, and the wiring port 5 places wiring in the rectangular groove 6; in order to adapt to the matching of the fixed column 35 and the elastic telescopic column 36, a through hole corresponding to the through hole is formed in the bottom of the rectangular groove 6 of the junction box 2, the through hole is connected with a positioning column 38 in a sliding mode, the positioning column 38 can slide along the through hole, one side, away from the circuit breaker 1, of the positioning column 38 is located on the rear side of the junction box 2 in a normal state and is placed in a cavity of the junction box 2 in a wall body, the inner diameter of the positioning column 38 is larger than that of the connection port 5, and a wire body connected with the connection base 37 of the connection port 5 penetrates through the through hole in the tail end of the positioning column 38 and is placed in the positioning column 38. When the circuit breaker 1 is overhauled and the circuit breaker 1 is detached from the junction box 2, the wire holder 37 of the wiring port 5 pulls out the positioning column 38 and the external wiring in the cavity of the box groove of the internal junction box 2, and the positioning column 38 slides towards the inside of the junction box 2 along the through hole in the process until the positioning column 38 is in a state as shown in the attached drawing of the specification and figure 5, so that the wire holder 37 of the wiring port 5 is positioned outside the junction box 2 and exposed, and the maintenance is convenient. Just push circuit breaker 1 in terminal box 2 once more after the maintenance finishes, put 3 casings in line chamber and fill in rectangular channel 6, put 3 casing peripheries in line chamber and be equipped with seal ring 4, seal ring 4 is sealed with the laminating of 6 inner walls of rectangular channel to with the sealed positioning post 38 in the 6 rear sides of rectangular channel of wiring port 5. The fixing post 35 and the elastic telescopic post 36 of the wiring terminal 5 are placed in the positioning post 38 and the positioning post 38 is pushed out of the junction box 2 from the rear side, so that the positioning post 38 is again placed in the cavity of the box groove of the junction box 2 in the wall body. In addition, the positioning column 38 is provided with a limiting flange 39 at both ends. The stop flange 39 is provided to prevent the positioning post 38 from being removed from the through hole.
In summary, in the structure of the circuit breaker 1 and the junction box 2, the wiring ports 5 can be sealed and sealed without leakage, and the tripping of the switch caused by the interphase short circuit of the circuit breaker 1 can be avoided; and the connected line body is sealed and sealed without leakage, so that a thick line insulation protection layer in the wiring cabinet can be prevented from being bitten by rats.
Prominent core design point two:
under the structural premise of the first prominent core design point, the following further improvements are provided.
As shown in the attached drawings of the specification, fig. 1, fig. 2 and fig. 3, the upper end and the lower end of the circuit breaker 1 are both provided with a waist-shaped groove 7, the innermost end of the waist-shaped groove 7 is communicated with the wire placing cavity 3 and the inner cavity of the circuit breaker 1 through holes, so that the wire placing cavity 3 and the inner cavity of the circuit breaker 1 can be communicated with each other through the waist-shaped groove 7. An acid gas drying agent is arranged in the waist-shaped groove 7. The back side plate surface of the breaker 1 is a heat dissipation plate 33, the heat dissipation plate 33 is further provided with a connecting plate 28, a plate gap 34 is arranged between the heat dissipation plate 33 and the connecting plate 28, and an acid gas drying agent is also arranged in the plate gap 34. The acid gas drying agents at the two positions can dry acid corrosive gas in the air, and the acid gas drying agents are mixed with common water vapor drying agents to prevent moisture. An inner cavity of the breaker 1 is also provided with an electrochemical gas sensor, such as an ME3-SO2 electrochemical gas sensor.
In conclusion, the wiring port 5 of the structure combined with the protruding core design point I is sealed and does not leak, the air flow is reduced due to the design of the whole structure, only the waist-shaped groove 7 and the heat dissipation plate 33 are provided with air flow, but acid gas drying agents are arranged at the air flow passages of the waist-shaped groove 7 and the heat dissipation plate 33 to prevent acid gas from entering an inner cavity, and the acid gas drying agents are mixed with common water vapor drying agents to prevent moisture, so that the moisture and corrosion can be well prevented; and the electrochemical gas sensor can monitor the concentration of the acid gas in real time, so that the entry of the acid gas can be early warned, and the electrochemical gas sensor is well suitable for a strong acid environment production workshop.
Prominent core design point three:
semiconductor thermoelectric refrigerating sheets are respectively arranged in the wire placing cavity 3 and the inner cavity of the circuit breaker 1 and are respectively used for refrigerating and radiating the wire connecting port 5 and the inner cavity of the circuit breaker 1. This technique adopts neotype semiconductor thermoelectric refrigeration piece's mode to be used for the inside heat dissipation of circuit breaker 1, dispels the heat to inside under the prerequisite that greatly reduced air flows.
Prominent core design point four:
as shown in fig. 7, 8 and 9 of the attached drawings of the specification, a bad grounding early warning protection device is arranged in the circuit breaker 1, and comprises a piezoresistor, and the piezoresistor is arranged between a power line and a ground connection. When the piezoresistor is used, a gas discharge tube with enough withstand voltage can be properly selected to be matched with the piezoresistor, and the series circuit of the piezoresistor and the gas discharge tube can bear the withstand voltage of basic insulation. The arrangement of the piezoresistor can continuously keep safe operation under the condition of poor grounding, thereby avoiding accidents. The specific principle is as follows:
the piezoresistor is arranged at the grounding port in parallel, when the grounding is normal, the current flows through the grounding port, the voltage between the piezoresistor access end 11 and the piezoresistor output end 12 is almost zero and is lower than the threshold voltage of the piezoresistor, and according to the characteristics of the piezoresistor, the resistance value is megaohm, and no current flows through the piezoresistor. When the grounding port is in poor grounding, only one grounding line is grounded through the piezoresistor, the voltage between the piezoresistor access end 11 and the piezoresistor output end 12 is the voltage between the power line and the ground, the voltage greatly exceeds the threshold voltage of the piezoresistor, the resistance value can be reduced to the ohm level and set to the milliohm level according to the characteristics of the piezoresistor, and the current breaks through the piezoresistor to flow through, so that the grounding of the line is ensured.
In conclusion, the application of the piezoresistor can continuously keep safe operation under the condition of poor grounding, and accidents are avoided.
In addition, the piezoresistor is arranged in a resistor box body 8, a piezoresistor working display lamp 10 is further arranged in the sub-cavity 9 on the upper side of the resistor box body 8, and the piezoresistor working display lamp 10 is arranged on a circuit between an access end 11 and an output end 12 of the piezoresistor. When the current breaks down the voltage-sensitive resistor to block the current, the voltage-sensitive resistor work display lamp 10 is on, so that the grounding line is indicated to flow through the voltage-sensitive resistor, and further the reaction current does not flow through the grounding port, so that the grounding of the grounding port is indicated to be abnormal, and the generation of the grounding defect phenomenon is promoted, so that the grounding defect early warning is carried out, and the follow-up maintenance is carried out.
Prominent core design point five:
as shown in the attached drawings of the specification, fig. 7, fig. 8 and fig. 9, when the voltage dependent resistor is heated and broken down due to the surge impact of the current, the voltage dependent resistor fails, so that a voltage dependent resistor failure alarm device is further arranged in the sub-chamber 9 on the upper side of the resistor box body 8. The piezoresistor failure alarm device comprises a failure alarm independent circuit, a fusing elastic sheet 13, a spring 14 and a rotary switch sheet 15; the failure alarm independent circuit comprises two circuit connection copper sheets 16 and a failure alarm lamp 17 powered by an independent power supply, one ends of the two circuit connection copper sheets 16 are connected with the failure alarm lamp 17, and the other end of one circuit connection copper sheet 16 is provided with an electric connection bump end 18; one end of the fusing elastic sheet 13 is rotatably connected to a first convex column 19 in the sub-chamber 9, the other end of the fusing elastic sheet 13 is connected with a spring 14, the other end of the spring 14 is fixed to a second convex column 20 in the sub-chamber 9, one end, close to the spring 14, of the fusing elastic sheet 13 is welded and fixed to the bottom surface of the sub-chamber 9 in a low-temperature soldering tin soldering mode, the access end 11 of the piezoresistor is connected with the fusing elastic sheet 13 through an electric connection lead 21 to form a passage, one end of the rotary switch sheet 15 is rotatably connected to a third convex column 22 in the sub-chamber 9 through a torsion spring 14, a triangular pressing projection 23 is arranged on the rotary switch sheet 15, one circuit connection copper sheet 16 can be pressed to be in contact with an electric connection convex point end 18 of the other circuit connection copper sheet 16 under the action of the triangular pressing projection 23, and therefore an independent failure alarm circuit is communicated. The sub-cavity 9 is provided with a limiting sheet groove 24 for limiting the two circuit connection copper sheets 16, the sub-cavity 9 is further provided with a normal state limiting projection 25 and a failure state limiting projection 26 for limiting the rotary switch sheet 15, and the normal state limiting projection 25 is matched with a limiting groove 27 in the rotary switch sheet 15.
As shown in the attached figure 8 of the specification, in the unused state or normal use state of the varistor, one end of the fusing elastic sheet 13 close to the spring 14 is welded and fixed on the bottom surface of the sub-chamber 9 by means of soldering tin of a low-temperature soldering iron, the spring 14 pulls one end of the fusing elastic sheet 13 in the extended state, but the elastic force is not enough to destroy the welding and fixing of the fusing elastic sheet 13 by the soldering tin, the rotary switch sheet 15 is pressed and held by the fusing elastic sheet 13, and the limit bump 25 in the normal state is kept aligned with the limit groove 27 on the rotary switch sheet 15, so that the triangular pressing bump 23 on the rotary switch sheet 15 can press one of the circuit connecting copper sheets 16 to be contacted with the electric connection bump terminal 18 of the other circuit connecting copper sheet 16, so that the failure alarm independent circuit is communicated, and the failure alarm lamp 17 is on to indicate that the varistor is not failed in normal use. As shown in fig. 9 of the attached drawings, when a current surge impacts, a current on the fusing elastic sheet 13 generates heat, the temperature reaches the fusing point of the soldering tin, so that the fusing elastic sheet 13 is not welded and fixed, the spring 14 in an extension state pulls the fusing elastic sheet 13 to rotate to one side far away from the rotary switch sheet 15 along the first convex column 19 under the elastic force state of recovery deformation, the fusing elastic sheet 13 no longer presses the rotary switch sheet 15, the rotary switch sheet 15 rotates to one side far away from the circuit connection copper sheet 16 along the third convex column 22 under the elastic force action of the torsion spring 14 until the limit bump 26 in a failure state abuts against the side of the rotary switch sheet 15, the triangular press bump 23 on the rotary switch sheet 15 cannot press one of the circuit connection copper sheets 16 to contact with the electric connection bump end 18 of the other circuit connection copper sheet 16 after rotation, the circuit connection copper sheet 16 breaks away from the electric connection bump end 18 under the elastic action of the self, so that the failure alarm independent circuit is not connected, and the failure alarm lamp 17 goes out, indicating that the pressure-sensitive resistor fails.
In conclusion, the piezoresistor failure alarm device with the structure principle can perform early warning on the effectiveness of the piezoresistor of the poor grounding early warning protection device, and the failure alarm lamp 17 is turned off to indicate that the piezoresistor fails, so that the replacement of the failed poor grounding early warning protection device is facilitated.
Prominent core design point six:
the fixation between the circuit breaker 1 and the junction box 2 is realized automatically, and the structure principle is as follows.
A connecting plate 28 is arranged on the rear side of the circuit breaker 1, a guide post 29 is arranged on the connecting plate 28, a fixing stud 30 is arranged in the center of the rear side of the circuit breaker 1, a servo motor in transmission connection with the fixing stud 30 is arranged in the inner cavity of the circuit breaker 1, and the servo motor drives the fixing stud 30 to rotate forwards and backwards; the box cavity of the junction box 2 is provided with a guide hole 31 corresponding to the guide post 29 and a threaded hole 32 in threaded connection with the fixing stud 30.
After the circuit breaker 1 is plugged into the junction box 2, the guide posts 29 are inserted into the guide holes 31 to form limiting alignment, so that the fixing studs 30 are opposite to the threaded holes 32, then the servo motor is started, and the servo motor drives the fixing studs 30 to rotate to be in threaded connection with the threaded holes 32, so that the circuit breaker 1 is fixed into the junction box 2. When the circuit breaker 1 is removed from the junction box 2, the servo motor is controlled to rotate reversely.
Further explanation is as follows:
and a breaker switch 40, a refrigerating sheet working switch 41, an acid gas concentration alarm display screen 42 and a motor switch 43 are arranged on the outer side of the breaker 1. In order to facilitate the fixing of the junction box 2 to a wall, the junction box 2 is provided with fixing lugs 44 on both sides. The protective dust filtering net 45 is arranged outside the waist-shaped groove 7, and the protective dust filtering net 45 is convenient to disassemble and assemble, so that the acidic gas drying agent in the waist-shaped hole is convenient to replace, and the dust filtering effect can be achieved.
Finally, to sum up:
in the structure of the circuit breaker 1 and the junction box 2, the positions of all the wiring ports 5 can be sealed and sealed without leakage, a thick line insulating protective layer in a wiring cabinet can be prevented from being broken by a mouse, and the switch tripping caused by the interphase short circuit of the circuit breaker 1 can also be avoided; the wiring port 5 is sealed and does not leak outside, and the acid gas drying agents are arranged at the vent passages of the waist-shaped groove 7 and the heat dissipation plate 33 to prevent the acid gas from entering the inner cavity, so that the moisture and corrosion can be well prevented; and the electrochemical gas sensor can monitor the concentration of the acid gas in real time, so that the entry of the acid gas can be early warned, and the electrochemical gas sensor is well suitable for a strong acid environment production workshop.
And can adopt the mode of neotype semiconductor thermoelectric refrigeration piece to be used for the inside heat dissipation of circuit breaker 1, dispel the heat to inside under the prerequisite that greatly reduced air flows.
Most importantly, the device is also provided with a bad grounding early warning protection device between the power line and the ground, and the piezoresistor arranged in the bad grounding early warning protection device is applied, so that the safe operation can be continuously kept and accidents are avoided under the condition of bad grounding, and the piezoresistor works to display that the piezoresistor works when the piezoresistor work display lamp 10 is turned on, so that the bad grounding phenomenon is released, the bad grounding early warning is carried out, and the follow-up maintenance is carried out. Meanwhile, the piezoresistor failure alarm device can also perform early warning on the effectiveness of the piezoresistor of the grounding failure early warning protection device, and the failure alarm lamp 17 is turned off to indicate that the piezoresistor fails, so that the replacement of the failed grounding failure early warning protection device is facilitated.
Claims (8)
1. A circuit breaking protector and a junction box thereof comprise a circuit breaker (1) and a junction box (2) matched with the circuit breaker (1); the method is characterized in that:
the upper end and the lower end of the rear side of the circuit breaker (1) are provided with a wire placing cavity (3), a sealing washer (4) is arranged on the periphery of a shell of the wire placing cavity (3), wiring ports (5) on the upper side and the lower side of the circuit breaker (1) are positioned on the rear side of the shell of the wire placing cavity (3), a rectangular groove (6) matched with the shell of the wire placing cavity (3) is arranged in the junction box (2), and wiring is placed in the rectangular groove (6) by the wiring ports (5);
waist-shaped grooves (7) are formed in the upper end and the lower end of the circuit breaker (1), the innermost end of each waist-shaped groove (7) is communicated with the wire placing cavity (3) and the inner cavity of the circuit breaker (1) through holes, and an acid gas drying agent is arranged in each waist-shaped groove (7);
semiconductor thermoelectric refrigerating sheets are respectively arranged in the wire placing cavity (3) and the inner cavity of the circuit breaker (1) and are respectively used for refrigerating and radiating the wire connecting port (5) and the inner cavity of the circuit breaker (1);
an inner cavity of the circuit breaker (1) is also provided with an electrochemical gas sensor;
the circuit breaker (1) is internally provided with a bad grounding early warning and protecting device, the bad grounding early warning and protecting device comprises a piezoresistor, and the piezoresistor is arranged between a power line and a ground connection wire; the piezoresistor is arranged at the ground port of the circuit breaker (1) in parallel;
the piezoresistor is arranged in a resistor box body (8), a piezoresistor work display lamp (10) is further arranged in a sub-chamber (9) on the upper side of the resistor box body (8), and the piezoresistor work display lamp (10) is arranged on a circuit between an access end (11) and an output end (12) of the piezoresistor.
2. A circuit breaker and terminal block therefor in accordance with claim 1, wherein: a piezoresistor failure alarm device is also arranged in the sub-chamber (9) at the upper side of the resistor box body (8); the piezoresistor failure alarm device comprises a failure alarm independent circuit, a fusing elastic sheet (13), a spring (14) and a rotary switch sheet (15); the failure alarm independent circuit comprises two circuit connection copper sheets (16) and a failure alarm lamp (17) powered by an independent power supply, one end of each of the two circuit connection copper sheets (16) is connected with the failure alarm lamp (17), and the other end of one circuit connection copper sheet (16) is provided with an electric connection bump end (18); one end of the fusing elastic sheet (13) is rotatably connected to a first convex column (19) in the sub-cavity (9), the other end of the fusing elastic sheet (13) is connected with a spring (14), the other end of the spring (14) is fixed to a second convex column (20) in the sub-cavity (9), one end, close to the spring (14), of the fusing elastic sheet (13) is welded and fixed to the bottom surface of the sub-cavity (9) in a low-temperature soldering tin soldering mode, the access end (11) of the piezoresistor is connected with the fusing elastic sheet (13) through a power connection lead (21) to form a passage, one end of the rotary switch sheet (15) is rotatably connected to a third convex column (22) in the sub-cavity (9) through the torsion spring (14), a triangular pressing bulge (23) is arranged on the rotary switch sheet (15), and a power connection convex end (18) of one circuit connection copper sheet (16) and the other circuit connection copper sheet (16) can be pressed to be in contact under the action of the triangular pressing bulge (23), so that the independent alarm circuit is communicated.
3. A circuit breaker protector and terminal block therefor in accordance with claim 2 wherein: be equipped with spacing piece groove (24) spacing for two circuit connection copper sheets (16) on minute cavity (9), just still be equipped with spacing lug (25) of normal condition and spacing lug (26) of failure state for rotating switch piece (15) spacing on minute cavity (9), spacing lug (25) of normal condition suits with spacing recess (27) on rotating switch piece (15).
4. A circuit breaker and terminal block therefor in accordance with claim 1, wherein: a connecting plate (28) is arranged on the rear side of the circuit breaker (1), a guide post (29) is arranged on the connecting plate (28), a fixing stud (30) is arranged at the center of the rear side of the circuit breaker (1), a servo motor in transmission connection with the fixing stud (30) is arranged in the inner cavity of the circuit breaker (1), and the servo motor drives the fixing stud (30) to rotate forwards and reversely;
the box cavity of the junction box (2) is provided with a guide hole (31) corresponding to the guide column (29) and a threaded hole (32) in threaded connection with the fixing stud (30), and the servo motor drives the fixing stud (30) to rotate and be in threaded connection with the threaded hole (32) so that the circuit breaker (1) is fixed in the junction box (2).
5. A circuit breaker and terminal block therefor as claimed in claim 4, wherein: the circuit breaker (1) rear side face is heating panel (33), be equipped with crack space (34) between heating panel (33) and connecting plate (28), also set up the acid gas drier in crack space (34).
6. A circuit breaker protector and terminal block therefor in accordance with claim 1 wherein: the wiring port (5) comprises a fixing column (35) and an elastic telescopic column (36), and a wiring seat (37) of the wiring port (5) is positioned on the outer side of the elastic telescopic column (36); the wire body that is connected with connection terminal (37) passes from the terminal perforation of positioning post (38) and arranges in positioning post (38) that rectangular channel (6) tank bottom of terminal box (2) is equipped with the through-hole corresponding with connection terminal (5), sliding connection has positioning post (38) on the through-hole, positioning post (38) are located terminal box (2) rear side and place box inslot of terminal box (2) in the wall body in, positioning post (38) internal diameter is greater than connection terminal (5) internal diameter.
7. A circuit breaker and terminal block therefor as claimed in claim 6, wherein: and two ends of the positioning column (38) are provided with limiting flanges (39).
8. A circuit breaker and terminal block therefor as claimed in claim 4, wherein: the circuit breaker (1) outside is equipped with circuit breaker switch (40), refrigeration piece operating switch (41), acid gas concentration warning display screen (42) and motor switch (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110753482.8A CN113345770B (en) | 2021-07-02 | 2021-07-02 | Circuit breaker protector and junction box thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110753482.8A CN113345770B (en) | 2021-07-02 | 2021-07-02 | Circuit breaker protector and junction box thereof |
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| CN113345770A CN113345770A (en) | 2021-09-03 |
| CN113345770B true CN113345770B (en) | 2022-12-06 |
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| CN202110753482.8A Active CN113345770B (en) | 2021-07-02 | 2021-07-02 | Circuit breaker protector and junction box thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114156105B (en) * | 2021-11-16 | 2024-03-08 | 扬州鹿洵智能科技有限公司 | Load immersed leakage protection switch |
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| CN113345770A (en) | 2021-09-03 |
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