CN110911246B - Remote control miniature circuit breaker - Google Patents
Remote control miniature circuit breaker Download PDFInfo
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- CN110911246B CN110911246B CN201911200072.XA CN201911200072A CN110911246B CN 110911246 B CN110911246 B CN 110911246B CN 201911200072 A CN201911200072 A CN 201911200072A CN 110911246 B CN110911246 B CN 110911246B
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- circuit breaker
- switching
- transmission gear
- expansion
- miniature 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
- H01H71/10—Operating or release mechanisms
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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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/121—Protection of release mechanisms
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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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
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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
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H2071/147—Thermal release by expansion of a fluid
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- Thermally Actuated Switches (AREA)
- Breakers (AREA)
Abstract
The invention provides a remote control miniature circuit breaker, which comprises a miniature circuit breaker body with an insulating shell and a switching-on/off handle, and further comprises an electric switching-on/off mechanism and a limiting device, wherein the switching-on/off mechanism comprises a frame body, a speed reducing motor with an output gear, a transmission gear, a sleeve cap and a shifting wheel, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, the shifting wheel drives the switching-on/off handle to perform switching-on/off action through the sleeve cap, the limiting device comprises an expansion body, a transmission rod and a rack, the rack is arranged at the tail end of the transmission rod, expansion substances in the expansion body expand by heating to generate volume-displacement change to push the transmission rod to move so as to enable the rack to move towards the direction of the transmission gear and to be meshed with the transmission gear, and the transmission gear is driven to rotate to drive the switching-on/off handle to perform switching-off action and limit the action of the electric switching-on/off mechanism. The invention can realize the switching-on and switching-off operation of the remote control circuit breaker and can realize the over-temperature protection of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a remote control miniature circuit breaker.
Background
The remote control miniature circuit breaker is a common type of miniature circuit breaker, and is convenient for remote monitoring and switching-on and switching-off operations of the circuit breaker. The existing circuit breaker can carry out remote opening and closing operation, but the existing circuit breaker cannot carry out over-temperature protection.
After a lot of searches, some typical prior arts such as patent No. 201820505608.3 provide a remote control circuit breaker which can improve the expandability and maintenance convenience of the circuit breaker. Still like application number 201710129006.2's patent discloses a remote control circuit breaker, but this circuit breaker realizes can long-range combined floodgate but the bidirectional control of long-range separating brake to this circuit breaker, through the closure of second fine motion division worker, makes long-range controlled combined floodgate and long-range separating brake take place to become invalid when manual separating brake to the security when having guaranteed manual operation and having overhauld. Still like the patent of application number 201110128032.6 discloses a remote control miniature circuit breaker, and it has mainly solved when current remote control miniature circuit breaker trips, there is induced voltage at the load end of circuit breaker, the poor problem of security performance, and the load end does not have induced voltage completely under the off-state, and safety level is high.
As can be seen, for the remote control miniature circuit breaker, there are many practical problems (automatically providing over-temperature opening protection, etc.) which need to be dealt with in practical applications, and no specific solutions have been proposed yet.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a remote control miniature circuit breaker, which has the following specific technical scheme:
a remote control miniature circuit breaker comprises a miniature circuit breaker body with an insulating shell and a switching-on/off handle, the remote control miniature circuit breaker also comprises an electric opening and closing mechanism for driving an opening and closing handle to reciprocate and a limiting device for limiting the action of the electric opening and closing mechanism, the switching-on and switching-off mechanism comprises a frame body, a speed reducing motor with an output gear, a transmission gear, a sleeve cap and a shifting wheel, the frame body is fixedly arranged on the insulating shell, the speed reducing motor is fixedly arranged on the frame body, the transmission gear is rotatably arranged on the frame body, the sleeve cap is sleeved on the opening and closing handle, the shifting wheel is used for driving the sleeve cap to rotate in a reciprocating mode, the sleeve cap comprises a clamping part clamped on the opening and closing handle and a shifting rod part penetrating through the mounting plate and extending into the shifting groove, and the shifting wheel drives the shifting rod part to rotate in a reciprocating mode in the reciprocating rotation; the limiting device is arranged on the frame body and comprises an expansion body, a transmission rod and a rack, the rack is arranged at the tail end of the transmission rod, expansion substances in the expansion body expand by heating to generate volume-displacement change to push the transmission rod to move so that the rack moves towards the direction of the transmission gear and is meshed with the transmission gear, the transmission gear is driven to rotate to drive the opening and closing handle to perform opening and closing actions and limit the actions of the electric opening and closing mechanism, and the volume change of the expansion substances in the expansion body is generated by the phase change of solid phase-liquid phase or liquid phase-gas phase of the substances.
Optionally, the support body includes mounting panel and extension board, connect through a plurality of bolt assembly between mounting panel and the extension board, gear motor is fixed to be set up on the outer wall of keeping away from the mounting panel on the extension board, output gear, drive gear and thumb wheel are located between extension board and the mounting panel, the mounting panel is fixed on the insulating housing outer wall of external miniature circuit breaker one side, be equipped with the group tooth that is less than the semicircle on the thumb wheel, the angle of group tooth place circumference is greater than the required turned angle of circuit breaker divide-shut brake operation.
Optionally, the expansion body is a casing including a sealed cavity, the transfer rod is a push rod piston, a push rod through hole is formed in the top end face of the casing, the push rod piston is movably arranged in the push rod through hole, the push rod piston is connected with the casing in a sealing mode, a fluid medium, a phase change expansion substance and an isolation diaphragm are installed in the sealed cavity, the isolation diaphragm is arranged between the fluid substance and the phase change expansion substance, one end of the push rod piston penetrates through the push rod through hole and is connected with the sliding plate, and the other end of the push rod piston is inserted into the fluid medium.
Optionally, the driving device further includes a heater, and the heater is disposed in the phase change expansion substance in the sealed cavity or on an outer side surface of the housing contacting the phase change expansion substance.
Optionally, a sealing element is arranged between the ejector rod piston and the shell, and the sealing element is an O-ring, a sealing gasket or an annular sealing sleeve.
Optionally, the phase change expanding substance is paraffin, and the fluid medium is liquid lubricating oil, lubricating grease or sealing grease.
Optionally, the heater is a PTC positive temperature coefficient thermistor or an electric heating device.
Optionally, the housing is fixedly disposed on the mounting plate.
The beneficial effects obtained by the invention comprise: the circuit breaker can drive the output gear to rotate forward and backward by controlling the forward and backward rotation of the speed reducing motor, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, then the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, and the opening and closing operation of the circuit breaker is remotely controlled. And when the temperature in the body of the miniature circuit breaker rises to a certain extent, the temperature of the expansion body rises accordingly. The expansion body expands in volume due to temperature rise, the expansion in volume is converted into displacement and force through a transmission rod with a proper size, the displacement and the force are transmitted to the rack, the rack moves towards the transmission gear and is meshed with the transmission gear, the transmission gear and the shifting wheel are pushed to rotate, and the opening operation of the circuit breaker is achieved. Because the expansion body is heated and heated, the volume is increased, and after the rack is meshed with the transmission gear, the action of the electric switching-on and switching-off mechanism can be limited, so that an operator cannot forcibly switch on the circuit breaker by controlling the servo motor, and the over-temperature protection of the circuit breaker is realized.
Drawings
The present invention may be further understood from the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.
Fig. 1 is a first schematic view of a structural relationship between an electric switching mechanism and a limiting device in one embodiment of the present invention;
fig. 2 is a schematic diagram showing an overall structure of a remote-controlled miniature circuit breaker according to one embodiment of the present invention;
fig. 3 is a schematic diagram of the overall structure of a remote-controlled miniature circuit breaker according to one embodiment of the present invention;
FIG. 4 is a schematic structural diagram of the electric opening/closing mechanism after the reduction motor and the support plate are removed according to one embodiment of the present invention;
fig. 5 is a schematic structural relationship diagram ii between the electric switching mechanism and the limiting device in the first embodiment of the present invention;
fig. 6 is a third schematic structural relationship diagram between the electric switching on/off mechanism and the limiting device in one embodiment of the invention;
fig. 7 is a fourth schematic structural relationship diagram between the electric switching mechanism and the limiting device in one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.
The invention relates to a remote control miniature circuit breaker, which explains the following embodiments according to the attached drawings:
the first embodiment is as follows:
as shown in fig. 1, 2, 3 and 4, a remote control miniature circuit breaker comprises a miniature circuit breaker body 1 with an insulating housing 11 and a switching-on/off handle 12, and further comprises an electric switching-on/off mechanism 2 for driving the switching-on/off mechanism to reciprocate on the handle and a limiting device for limiting the action of the electric switching-on/off mechanism 1, wherein the electric switching-on/off mechanism 2 comprises a frame body 21 fixedly arranged on the insulating housing 11, a speed reducing motor 23 with an output gear 22 arranged on the frame body 21, a transmission gear 24 rotatably arranged on the frame body 21, a sleeve cap 25 sleeved on the switching-on/off handle, and a dial wheel 26 for driving the sleeve cap to rotate in a reciprocating manner, the output gear 23 drives the dial wheel 26 to rotate in a reciprocating manner through the transmission gear 24, the dial wheel 26 is used for driving the sleeve cap 25 to rotate in a reciprocating mode, and the dial wheel 26 drives the opening and closing handle 12 to perform opening and closing actions through the sleeve cap 25. The edge of the thumb wheel 26 is provided with a thumb groove 261, the sleeve cap 25 comprises a clamping portion 251 clamped on the opening/closing handle 12 and a thumb lever portion 252 penetrating through the mounting plate and extending into the thumb groove 261, the thumb wheel 26 drives the thumb lever portion 252 to rotate in a reciprocating manner in the reciprocating rotation, the output gear 23 drives the thumb wheel 26 to rotate in a reciprocating manner through the transmission gear 24, and then the thumb wheel 26 drives the opening/closing handle 12 to perform opening/closing actions through the sleeve cap 25. Here, the dial groove 261 is provided along the center axis direction of the dial 26 and penetrates the dial 26.
The limiting device is arranged on the frame body 21 and comprises an expansion body 30, a transmission rod 31 and a rack 32, wherein the rack 32 is arranged at the tail end of the transmission rod 31, expansion substances in the expansion body 30 expand by heating to generate volume-displacement change to push the transmission rod 31 to move so that the rack 32 moves towards the direction of the transmission gear 24 and is meshed with the transmission gear 24, the transmission gear 24 is driven to rotate to drive the opening and closing handle 12 to perform opening and closing actions and limit the actions of the electric opening and closing mechanism, and the volume change of the expansion substances in the expansion body 30 is generated when the solid phase-liquid phase or liquid phase-gas phase of the substances per se change.
The circuit breaker can drive the output gear to rotate forward and backward by controlling the forward and backward rotation of the speed reduction motor, the output gear drives the shifting wheel to rotate back and forth through the transmission gear, and then the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, so that the opening and closing operation of the remote control circuit breaker is realized. And when the temperature in the body of the miniature circuit breaker rises to a certain extent, the temperature of the expansion body rises accordingly. The expansion body expands in volume due to temperature rise, the expansion in volume is converted into displacement and force through a transmission rod with a proper size, the displacement and the force are transmitted to the rack, the rack moves towards the transmission gear and is meshed with the transmission gear, the transmission gear and the shifting wheel are pushed to rotate, and the opening operation of the circuit breaker is achieved. Because the expansion body is heated and the temperature rises, the volume is increased, and after the rack is meshed with the transmission gear, the action of the electric switching-on and switching-off mechanism can be limited, so that an operator can not forcibly switch on the circuit breaker by controlling the servo motor, and the over-temperature protection of the circuit breaker is realized.
Only when the temperature of the circuit breaker is recovered to the normal range, the transmission rod retracts into the expansion body, and after the rack is separated from the transmission gear, the electric switching-on and switching-off mechanism can be further utilized to carry out switching-on and switching-off operation on the circuit breaker. As shown in fig. 1, the left, right, up and down positions of the transmission rod and the rack at normal temperature can be properly adjusted so as to mesh with the transmission gear at high temperature. The limiting device can be arranged on the left side or the right side of the transmission gear according to the relation between the forward and reverse rotation of the transmission gear and the opening and closing action of the circuit breaker. Those skilled in the art can make adjustments as needed, and will not be described in detail herein.
The frame 21 body comprises a mounting plate 211 fixed on the side wall of the insulating shell, a support plate 212 positioned outside the insulating shell, and a plurality of supporting connecting bolt assemblies 213 for connecting the mounting plate and the support plate; the speed reducing motor 23 is fixedly arranged on the outer wall of the support plate 212 far away from the miniature circuit breaker body 1, and the output gear 22, the transmission gear 24 and the thumb wheel 26 are positioned between the support plate and the mounting plate.
As a preferable technical solution, the expansion body 30 is a casing 301 including a sealed cavity, and the casing 30 is fixedly arranged on the mounting plate. The transmission rod 31 is a push rod piston, a push rod through hole is formed in the top end face of the shell 301, the push rod piston is movably arranged in the push rod through hole, the push rod piston is connected with the shell 301 in a sealing mode, a fluid medium 303, a phase change expansion substance 304 and an isolation diaphragm 302 are installed in the sealing cavity, the isolation diaphragm 302 is arranged between the fluid substance 303 and the phase change expansion substance 304, one end of the push rod piston penetrates through the push rod through hole and is connected with the rack 32, and the other end of the push rod piston is inserted into the fluid medium. In this embodiment, the phase change expansion substance is paraffin, the fluid medium is liquid lubricating oil, lubricating grease or sealing grease, a sealing element 306 is disposed between the plunger piston and the housing 301, and the sealing element 306 is an O-ring, a sealing gasket or an annular sealing sleeve.
Example two:
as shown in fig. 1, 2, 3 and 4, a remote control miniature circuit breaker comprises a miniature circuit breaker body 1 with an insulating housing 11 and a switching-on/off handle 12, and further comprises an electric switching-on/off mechanism 2 for driving the switching-on/off mechanism to reciprocate on the handle and a limiting device for limiting the action of the electric switching-on/off mechanism 1, wherein the electric switching-on/off mechanism 2 comprises a frame body 21 fixedly arranged on the insulating housing 11, a speed reducing motor 23 with an output gear 22 arranged on the frame body 21, a transmission gear 24 rotatably arranged on the frame body 21, a sleeve cap 25 sleeved on the switching-on/off handle, and a dial wheel 26 for driving the sleeve cap to rotate in a reciprocating manner, the output gear 23 drives the dial wheel 26 to rotate in a reciprocating manner through the transmission gear 24, the dial wheel 26 is used for driving the sleeve cap 25 to rotate in a reciprocating mode, and the dial wheel 26 drives the opening and closing handle 12 to perform opening and closing actions through the sleeve cap 25. The edge of the thumb wheel 26 is provided with a thumb groove 261, the sleeve cap 25 comprises a clamping portion 251 clamped on the opening/closing handle 12 and a thumb lever portion 252 penetrating through the mounting plate and extending into the thumb groove 261, the thumb wheel 26 drives the thumb lever portion 252 to rotate in a reciprocating manner in the reciprocating rotation, the output gear 23 drives the thumb wheel 26 to rotate in a reciprocating manner through the transmission gear 24, and then the thumb wheel 26 drives the opening/closing handle 12 to perform opening/closing actions through the sleeve cap 25. Here, the dial groove 261 is provided along the center axis direction of the dial 26 and penetrates the dial 26.
The limiting device is arranged on the frame body 21 and comprises an expansion body 30, a transmission rod 31 and a rack 32, wherein the rack 32 is arranged at the tail end of the transmission rod 31, expansion substances in the expansion body 30 expand by heating to generate volume-displacement change to push the transmission rod 31 to move so that the rack 32 moves towards the direction of the transmission gear 24 and is meshed with the transmission gear 24, the transmission gear 24 is driven to rotate to drive the opening and closing handle 12 to perform opening and closing actions and limit the actions of the electric opening and closing mechanism, and the volume change of the expansion substances in the expansion body 30 is generated when the solid phase-liquid phase or liquid phase-gas phase of the substances per se change.
The circuit breaker can drive the output gear to rotate forward and backward by controlling the forward and backward rotation of the speed reducing motor, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, then the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, and the opening and closing operation of the circuit breaker is remotely controlled. And when the temperature in the body of the miniature circuit breaker rises to a certain extent, the temperature of the expansion body rises accordingly. The expansion body expands in volume due to temperature rise, the expansion in volume is converted into displacement and force through a transmission rod with a proper size, the displacement and the force are transmitted to the rack, the rack moves towards the transmission gear and is meshed with the transmission gear, the transmission gear and the shifting wheel are pushed to rotate, and the opening operation of the circuit breaker is achieved. Because the expansion body is heated and heated, the volume is increased, and after the rack is meshed with the transmission gear, the action of the electric switching-on and switching-off mechanism can be limited, so that an operator cannot forcibly switch on the circuit breaker by controlling the servo motor, and the over-temperature protection of the circuit breaker is realized.
Only when the temperature of the circuit breaker is recovered to the normal range, the transmission rod retracts into the expansion body, and after the rack is separated from the transmission gear, the electric switching-on and switching-off mechanism can be further utilized to carry out switching-on and switching-off operation on the circuit breaker. As shown in fig. 1, the left, right, up and down positions of the transmission rod and the rack at normal temperature can be properly adjusted so as to mesh with the transmission gear at high temperature. The limiting device can be arranged on the left side or the right side of the transmission gear according to the relation between the forward and reverse rotation of the transmission gear and the opening and closing action of the circuit breaker. The pitch of the teeth, the length of the rack, the length of the transmission rod and other parameters can be adjusted by the skilled person according to needs and experiments, and are not described in detail herein.
The frame 21 body comprises a mounting plate 211 fixed on the side wall of the insulating shell, a support plate 212 positioned outside the insulating shell, and a plurality of supporting connecting bolt assemblies 213 for connecting the mounting plate and the support plate; the speed reducing motor 23 is fixedly arranged on the outer wall of the support plate 212 far away from the miniature circuit breaker body 1, and the output gear 22, the transmission gear 24 and the thumb wheel 26 are positioned between the support plate and the mounting plate.
As a preferable technical solution, the expansion body 30 is a casing 301 including a sealed cavity, and the casing 301 is fixedly arranged on the mounting plate. The transmission rod 31 is a push rod piston, a push rod through hole is formed in the top end face of the shell 301, the push rod piston is movably arranged in the push rod through hole, the push rod piston is connected with the shell 301 in a sealing mode, a fluid medium 303, a phase change expansion substance 304 and an isolation diaphragm 302 are installed in the sealing cavity, the isolation diaphragm 302 is arranged between the fluid substance 303 and the phase change expansion substance 304, one end of the push rod piston penetrates through the push rod through hole and is connected with the rack 32, and the other end of the push rod piston is inserted into the fluid medium. In this embodiment, the phase change expansion substance is paraffin, the fluid medium is liquid lubricating oil, lubricating grease or sealing grease, a sealing element 306 is disposed between the plunger piston and the housing 301, and the sealing element 306 is an O-ring, a sealing gasket or an annular sealing sleeve.
In this embodiment, as shown in fig. 1 and 5, the limiting 3 device in the remote control miniature circuit breaker further comprises a heater 305, and the heater 305 is arranged in the phase change expansion substance in the sealed cavity or on the outer side surface of the shell in contact with the phase change expansion substance. The phase change expansion substance is heated by the heater to raise the temperature, so that the breaker can be actively subjected to opening operation, and the breaker can be selectively subjected to opening protection.
Example three:
as shown in fig. 1, 2, 3 and 4, a remote control miniature circuit breaker comprises a miniature circuit breaker body 1 with an insulating housing 11 and a switching-on/off handle 12, and further comprises an electric switching-on/off mechanism 2 for driving the switching-on/off mechanism to reciprocate on the handle and a limiting device for limiting the action of the electric switching-on/off mechanism 1, wherein the electric switching-on/off mechanism 2 comprises a frame body 21 fixedly arranged on the insulating housing 11, a speed reducing motor 23 with an output gear 22 arranged on the frame body 21, a transmission gear 24 rotatably arranged on the frame body 21, a sleeve cap 25 sleeved on the switching-on/off handle, and a dial wheel 26 for driving the sleeve cap to rotate in a reciprocating manner, the output gear 23 drives the dial wheel 26 to rotate in a reciprocating manner through the transmission gear 24, the dial wheel 26 is used for driving the sleeve cap 25 to rotate in a reciprocating mode, and the dial wheel 26 drives the opening and closing handle 12 to perform opening and closing actions through the sleeve cap 25. A shifting groove 261 is formed in the edge of the shifting wheel 26, the sleeve cap 25 comprises a clamping portion 251 clamped on the opening and closing handle 12 and a shifting rod portion 252 penetrating through the mounting plate and extending into the shifting groove 261, the shifting wheel 26 drives the shifting rod portion 252 to rotate in a reciprocating mode in the reciprocating rotation, the output gear 23 drives the shifting wheel 26 to rotate in a reciprocating mode through the transmission gear 24, and then the shifting wheel 26 drives the opening and closing handle 12 to perform opening and closing actions through the sleeve cap 25. Here, the dial groove 261 is provided along the central axis direction of the dial 26 and penetrates the dial 26.
The limiting device is arranged on the frame body 21 and comprises an expansion body 30, a transmission rod 31 and a rack 32, wherein the rack 32 is arranged at the tail end of the transmission rod 31, expansion substances in the expansion body 30 expand by heating to generate volume-displacement change to push the transmission rod 31 to move so that the rack 32 moves towards the direction of the transmission gear 24 and is meshed with the transmission gear 24, the transmission gear 24 is driven to rotate to drive the opening and closing handle 12 to perform opening and closing actions and limit the actions of the electric opening and closing mechanism, and the volume change of the expansion substances in the expansion body 30 is generated when the solid phase-liquid phase or liquid phase-gas phase of the substances per se change.
The circuit breaker can drive the output gear to rotate forward and backward by controlling the forward and backward rotation of the speed reducing motor, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, then the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, and the opening and closing operation of the circuit breaker is remotely controlled. And when the temperature in the body of the miniature circuit breaker rises to a certain extent, the temperature of the expansion body rises accordingly. The expansion body expands in volume due to temperature rise, the expansion in volume is converted into displacement and force through a transmission rod with a proper size, the displacement and the force are transmitted to the rack, the rack moves towards the transmission gear and is meshed with the transmission gear, the transmission gear and the shifting wheel are pushed to rotate, and the opening operation of the circuit breaker is achieved. Because the expansion body is heated and the temperature rises, the volume is increased, and after the rack is meshed with the transmission gear, the action of the electric switching-on and switching-off mechanism can be limited, so that an operator can not forcibly switch on the circuit breaker by controlling the servo motor, and the over-temperature protection of the circuit breaker is realized.
Only when the temperature of the circuit breaker is recovered to the normal range, the transmission rod retracts into the expansion body, and after the rack is separated from the transmission gear, the electric switching-on and switching-off mechanism can be further utilized to carry out switching-on and switching-off operation on the circuit breaker. As shown in fig. 1, the left, right, up and down positions of the transmission rod and the rack at normal temperature can be properly adjusted so that the transmission rod and the rack can be meshed with the transmission gear at high temperature. The limiting device can be arranged on the left side or the right side of the transmission gear according to the relation between the forward and reverse rotation of the transmission gear and the opening and closing action of the circuit breaker. The tooth pitch, the length of the rack and the length of the transmission rod and other parameters can be adjusted by the technical personnel in the field according to the needs and experiments, and are not described in detail herein.
The frame 21 body comprises a mounting plate 211 fixed on the side wall of the insulating shell, a support plate 212 positioned outside the insulating shell, and a plurality of supporting connecting bolt assemblies 213 for connecting the mounting plate and the support plate; the speed reducing motor 23 is fixedly arranged on the outer wall of the support plate 212 far away from the miniature circuit breaker body 1, and the output gear 22, the transmission gear 24 and the thumb wheel 26 are positioned between the support plate and the mounting plate.
As a preferable technical solution, the expansion body 30 is a housing 301 including a sealed cavity, and the housing 30 is fixedly disposed on the mounting plate. The transmission rod 31 is a push rod piston, a push rod through hole is formed in the top end face of the shell 301, the push rod piston is movably arranged in the push rod through hole, the push rod piston is connected with the shell 301 in a sealing mode, a fluid medium 303, a phase change expansion substance 304 and an isolation diaphragm 302 are installed in the sealing cavity, the isolation diaphragm 302 is arranged between the fluid substance 303 and the phase change expansion substance 304, one end of the push rod piston penetrates through the push rod through hole and is connected with the rack 32, and the other end of the push rod piston is inserted into the fluid medium. In this embodiment, the phase change expanding substance is paraffin, the fluid medium is liquid lubricating oil, lubricating grease or sealing grease, a sealing element is arranged between the plunger piston and the casing 301, and the sealing element is an O-ring, a sealing gasket or an annular sealing sleeve.
In this embodiment, as shown in fig. 1 and 5, the limiting 3 device in the remote control miniature circuit breaker further comprises a heater 305, and the heater 305 is arranged in the phase change expansion substance in the sealed cavity or on the outer side surface of the shell contacted with the phase change expansion substance. The phase change expansion substance is promoted to heat and raise the temperature through the heater, the circuit breaker can be actively subjected to switching-off operation, and the circuit breaker can be selectively subjected to switching-off protection.
As shown in fig. 6 and 7, a coil spring 307 is provided between the rod piston and the housing 301. When the phase change expanding substance is at normal temperature, the coil spring 307 is in a natural extension state. The phase change expanding material is expanded by heating, and when the volume is increased, the spiral spring is stretched to store energy. When the temperature of the phase change expansion material is reduced, the push rod piston can be pulled back to the original position through the spiral spring, so that the rack can be better separated from the transmission gear. Here, the length and the elastic system of the coil spring are referred to. Those skilled in the art can make adjustments as needed and as a result of experimentation, and further details are not provided herein.
In summary, the remote control miniature circuit breaker disclosed by the invention has the following beneficial technical effects: the circuit breaker can drive the output gear to rotate forward and backward by controlling the forward and backward rotation of the speed reducing motor, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, then the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, and the opening and closing operation of the circuit breaker is remotely controlled. And when the temperature in the body of the miniature circuit breaker rises to a certain extent, the temperature of the expansion body rises accordingly. The expansion body expands in volume due to temperature rise, the expansion in volume is converted into displacement and force through a transmission rod with a proper size, the displacement and the force are transmitted to the rack, the rack moves towards the transmission gear and is meshed with the transmission gear, the transmission gear and the shifting wheel are pushed to rotate, and the opening operation of the circuit breaker is achieved. Because the expansion body is heated and heated, the volume is increased, and after the rack is meshed with the transmission gear, the action of the electric switching-on and switching-off mechanism can be limited, so that an operator cannot forcibly switch on the circuit breaker by controlling the servo motor, and the over-temperature protection of the circuit breaker is realized.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples, and various configurations may omit, replace, or add various processes or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many of the elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, such as well-known circuits, processes, algorithms, structures, and techniques, which have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (7)
1. A remote control miniature circuit breaker comprises a miniature circuit breaker body with an insulating shell and a switching-on/off handle, and is characterized by further comprising an electric switching-on/off mechanism for driving the switching-on/off handle to reciprocate and a limiting device for limiting the action of the electric switching-on/off mechanism, wherein the switching-on/off mechanism comprises a frame body, a speed reduction motor with an output gear, a transmission gear, a sleeve cap and a shifting wheel, the frame body is fixedly arranged on the insulating shell, the speed reduction motor is fixedly arranged on the frame body, the transmission gear is rotatably arranged on the frame body, the sleeve cap is sleeved on the switching-on/off handle, the shifting wheel is used for driving the sleeve cap to rotate in a reciprocating manner, a shifting groove is arranged at the edge of the shifting wheel, the sleeve cap comprises a clamping part clamped on the switching-on/off handle and a shifting rod part penetrating through a mounting plate and extending into the shifting groove, and the shifting wheel drives the shifting rod part to rotate in a reciprocating manner, the output gear drives the shifting wheel to rotate in a reciprocating mode through the transmission gear, the shifting wheel drives the opening and closing handle to perform opening and closing actions through the sleeve cap, the limiting device is arranged on the frame body and comprises an expansion body, a transmission rod and a rack, the rack is arranged at the tail end of the transmission rod, expansion substances in the expansion body expand by heating to generate volume-displacement changes to push the transmission rod to move so that the rack moves towards the direction of the transmission gear and is meshed with the transmission gear, the transmission gear is driven to rotate to drive the opening and closing handle to perform opening and closing actions and limit the actions of the electric opening and closing mechanism, and the volume changes of the expansion substances in the expansion body are generated when the phase of solid phase-liquid phase or liquid phase-gas phase of the substances per se is changed;
the expansion body is a shell comprising a sealed cavity, the transmission rod is a push rod piston, a push rod through hole is formed in the top end face of the shell, the push rod piston is movably arranged in the push rod through hole and is in sealed connection with the shell, a fluid medium, a phase change expansion substance and an isolation diaphragm are arranged in the sealed cavity, the isolation diaphragm is arranged between the fluid substance and the phase change expansion substance, one end of the push rod piston penetrates through the push rod through hole and is connected with the sliding plate, the other end of the push rod piston is inserted into the fluid medium, a spiral spring is arranged between the push rod piston and the shell, the spiral spring is in a natural extension state when the phase change expansion substance is at a normal temperature, and the spiral spring is stretched to store energy when the phase change expansion substance is heated to expand and the volume is increased.
2. The remote control miniature circuit breaker according to claim 1, wherein the frame body comprises a mounting plate and a support plate, the mounting plate and the support plate are connected through a plurality of bolt assemblies, the speed reduction motor is fixedly arranged on the outer wall of the support plate far away from the mounting plate, the output gear, the transmission gear and the shifting wheel are positioned between the support plate and the mounting plate, the mounting plate is fixed on the outer wall of the insulating shell on one side of the external miniature circuit breaker, the shifting wheel is provided with shifting teeth smaller than a half circle, and the angle of the circle where the shifting teeth are positioned is larger than the rotation angle required by the opening and closing operation of the circuit breaker.
3. The remote-controlled miniature circuit breaker according to claim 2, wherein said confining means further comprises a heater disposed within said phase change intumescent material within said sealed chamber or on an exterior side of said housing in contact with said phase change intumescent material.
4. The remote-controlled miniature circuit breaker according to claim 3, wherein a sealing member is provided between said plunger piston and said housing, said sealing member being an O-ring, a gasket or an annular gland.
5. A remote-controlled miniature circuit breaker according to claim 4 wherein said phase change intumescent substance is paraffin and said fluid medium is a liquid lubricant, grease or grease seal.
6. A remote controlled miniature circuit breaker according to claim 5 wherein said heater is a PTC positive temperature coefficient thermistor or an electrothermal device.
7. A remote controlled miniature circuit breaker as recited in claim 6 wherein said housing is fixedly mounted to a mounting plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911200072.XA CN110911246B (en) | 2019-11-29 | 2019-11-29 | Remote control miniature circuit breaker |
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| CN201911200072.XA CN110911246B (en) | 2019-11-29 | 2019-11-29 | Remote control miniature circuit breaker |
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| CN110911246A CN110911246A (en) | 2020-03-24 |
| CN110911246B true CN110911246B (en) | 2022-09-06 |
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| CN117650025B (en) * | 2024-01-29 | 2024-04-19 | 无锡安生技防智联技术有限公司 | 4G remote control type intelligent circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005024270B3 (en) * | 2005-05-27 | 2006-10-19 | Ellenberger & Poensgen Gmbh | Device for remote actuation of circuit breaker manual actuator has drive mechanism actuated when lever moved manually from one end position to the other to transfer gear mechanism from one end position to the other |
| CN102103947B (en) * | 2010-11-18 | 2012-05-02 | 冯硕 | Driving device for closing/opening execution mechanism of circuit breaker |
| CN202058606U (en) * | 2010-12-29 | 2011-11-30 | 北京Abb低压电器有限公司 | Power push device and switch including the same |
| CN202093997U (en) * | 2010-12-31 | 2011-12-28 | 北京Abb低压电器有限公司 | Damage-prevention unloading mechanism and switch comprising same |
| CN103456575B (en) * | 2013-08-02 | 2016-11-02 | 宏秀电气有限公司 | Miniature electric switch-on-off type circuit breaker |
| CN103811202B (en) * | 2014-03-05 | 2016-01-27 | 上海方同电气科技发展有限公司 | The cam on/off switch mechanism of device for switching |
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