CN109727831B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN109727831B CN109727831B CN201711051606.8A CN201711051606A CN109727831B CN 109727831 B CN109727831 B CN 109727831B CN 201711051606 A CN201711051606 A CN 201711051606A CN 109727831 B CN109727831 B CN 109727831B
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- circuit breaker
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- bimetallic strip
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- 238000009434 installation Methods 0.000 claims abstract description 92
- 238000005192 partition Methods 0.000 claims description 29
- 230000007935 neutral effect Effects 0.000 claims description 26
- 230000017525 heat dissipation Effects 0.000 claims description 14
- 230000009191 jumping Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 14
- 239000004020 conductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
A circuit breaker comprises a shell and a handle which is pivotally connected inside the shell and one end of which extends out of the shell, wherein the handle is arranged in the shell and comprises a wire inlet end, a wire outlet end, an operating mechanism, an arc extinguishing mechanism, an electromagnetic system and a bimetallic strip component; the inner space of the breaker is layered along the thickness direction and comprises a first layer of mounting cavity and a second layer of mounting cavity; the handle, the inlet wire end, the outlet wire end, operating device, the arc extinguishing mechanism, electromagnetic system and bimetallic strip subassembly are installed in first floor's installation cavity and second floor's installation cavity respectively. According to the invention, the components in the circuit breaker are arranged in a layered manner, the components in the circuit breaker are arranged again, the thickness of the circuit breaker is properly increased, the height of the circuit breaker is reduced, the working environment of the circuit breaker for communication is met, and obviously, the circuit breaker can also meet the requirements of special circuit breakers in other industries.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a circuit breaker for communication.
Background
In the communications industry, standard cabinets have a working unit of 1U, i.e. a height of about 44.45mm. Along with the high-speed development of communication technology, components inside the cabinet are continuously miniaturized to meet the design requirement of 1U, and the use area of a machine room is saved by improving the density of the components in the cabinet. The traditional Miniature Circuit Breaker (MCB) has the height of about 80-90mm, and the space for wiring the lead wire needs to occupy the height of 3U, so that the development of the communication cabinet is restricted. In addition, the existing communication circuit breaker also has the problems of inconvenient wiring, poor heat dissipation of an arc extinguishing mechanism and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the circuit breaker which is simple and compact in structure, stable in performance installation and low in cost.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A circuit breaker comprises a shell 1 and a handle 8 which is pivotally connected inside the shell 1 and one end of which extends out of the shell 1, an inlet wire end 2, an outlet wire end 3, an operating mechanism 4, an arc extinguishing mechanism 5, an electromagnetic system 6 and a bimetallic strip component 7 which are arranged in the shell 1; the inner space of the circuit breaker is layered along the thickness direction and comprises a first layer of installation cavity 101 and a second layer of installation cavity 102; the handle 8, the incoming line end 2, the outgoing line end 3, the operating mechanism 4, the arc extinguishing mechanism 5, the electromagnetic system 6 and the bimetallic strip assembly 7 are respectively arranged in the first layer installation cavity 101 and the second layer installation cavity 102.
Further, the incoming line end 2, the outgoing line end 3, the operating mechanism 4, the arc extinguishing mechanism 5 and the electromagnetic system 6 are arranged in the first layer installation cavity 101; the handle 8 and the bi-metallic strip assembly 7 are mounted within the second tier mounting chamber 102.
Further, the shell 1 comprises a middle partition plate 11, a base 12 and a cover 13, wherein the base 12 and the cover 13 are respectively buckled on two sides of the middle partition plate 11; the middle partition plate 11 divides the internal space of the circuit breaker into a first-layer installation cavity 101 and a second-layer installation cavity 102; the handle 8 and the wire outlet end 3 are arranged at the top of the shell 1 along the thickness direction of the circuit breaker in a working state, the handle 8 and the wire outlet end 3 are arranged at one side of the shell 1, the electromagnetic system 6 is arranged under the wire outlet end 3, the electromagnetic system 6 is electrically connected with the wire outlet end 3, the operating mechanism 4 is arranged at one side of the electromagnetic system 6, the arc extinguishing mechanism 5 is arranged under the electromagnetic system 6, the bimetallic strip component 7 is arranged at the bottom of the shell 1 and is positioned under one side of the operating mechanism 4, and the bimetallic strip component 7 is electrically connected with the wire inlet end 2.
Further, the wire outlet end 3 is protruded at the top of the shell 1, and the wire outlet end 3 comprises a wire outlet end shell 31 obliquely arranged at the top of the shell 1 and a wiring terminal installed in the wire outlet end shell 31, wherein the wiring terminal is obliquely arranged upwards; the wire outlet terminal housing 31 includes a first side 311 disposed parallel to the wire connection terminal of the wire outlet terminal 3 and a second side 312 disposed perpendicular to the wire connection terminal of the wire outlet terminal 3, the first side 311 is provided with a wire connection window 311a for connection, and the second side 312 is provided with a screw window 312a for mounting a wire connection screw.
Further, the height of the circuit breaker is 37-40mm, the thickness of the circuit breaker is 25-30mm, and the length of the circuit breaker is 95-100mm.
Further, the operating mechanism 4 comprises a U-shaped rod 41, a lock catch 42, a jump button 43 and a bracket 44; the support 44 is pivotally connected to the shell 1, the lock catch 42 is pivotally connected to one side of the support 44 facing the bimetallic strip assembly 7, the lock catch 42 is located above the lock catch 43, one end of the U-shaped rod 41 passes through a first slot 103 on the middle partition plate 11 and is pivotally connected with the handle 8, the other end of the U-shaped rod is pivotally connected with the lock catch 42, the lock catch 43 and the lock catch 42 are in snap-fit connection, the support 44 is also pivotally connected with the moving contact 9, the fixed contact 10 is arranged below the electromagnetic system 6, the fixed contact 10 and the moving contact 9 are oppositely arranged, and the circuit breaker drives the fixed contact 10 and the moving contact 9 to contact and separate through the handle 8 to switch on and off a circuit.
Further, the jump button 43 includes a first end arm 431 and a second end arm 432, the first end arm 431 is in snap connection with the lock catch 42, the first end arm 431 is provided with a snap recess 4311 towards the lock catch 42, and the lock catch 42 is provided with a snap protrusion 4211 in snap connection with the snap recess 4311 towards the first end arm 431; the second end arm 432 protrudes inwards towards one side of the second-layer mounting cavity 102 and is provided with a third end arm 433 which is in contact fit with the bimetallic strip 71 of the bimetallic strip assembly 7, one side of the third end arm 433 towards the bimetallic strip 71 protrudes and is provided with a touch boss 4331, the middle partition plate 11 is provided with a third end arm 433 which penetrates through a second slot 104 matched with the bimetallic strip 71, one end of the bimetallic strip 71 is fixed, the other end of the bimetallic strip 71 faces the touch boss 4331, and when an overload fault occurs to the circuit, the bimetallic strip 71 is deformed by heating and collides against the touch boss 4331 to drive the operating mechanism 4 to trip and cut off the circuit; the middle part of the jump button 43 is connected with an elastic reset mechanism 15 for resetting the jump button 43 towards the other side; the end of the second end arm 432 protrudes toward the other side, and a limiting protrusion 4321 is provided, and the limiting protrusion 4321 extends to one side of the moving contact 9 and is located below the bracket 44.
Further, the elastic restoring mechanism 15 includes a restoring mechanism body 151, the restoring mechanism body 151 is disposed on the other side of the bracket 44 and parallel to the other side of the bracket 44, the restoring mechanism body 151 is provided with a pivot hole 1511 pivotally connected to the bracket 44, an elastic wing 152 is disposed on the restoring mechanism body 151 and extends upward, and the elastic wing 152 includes a wavy wing 1521 and a circular portion 1522 at an end of the wavy wing 1521; the canceling release mechanical system body 151 is equipped with first supporting lug 153 towards the one side protrusion of jumping knot 43, the top protrusion of first supporting lug 153 is equipped with square installation piece 1531, one side of jumping knot 43 towards canceling release mechanical system body 151 is equipped with the second supporting lug, the middle part of second supporting lug is equipped with square installation groove 4341 with square installation piece 1531 installation complex, the top of square installation piece 1531 is equipped with rivet 1532, square installation groove 4341's bottom is sunken to be equipped with rivet 1532 riveting hole 4342, jumping knot 43 and canceling release mechanical system body 151 pivot connection simultaneously at support 44 linkage complex.
Further, an additional housing 17 is buckled on one side of the outlet end 3 of the housing 1, a neutral wire inlet end 172 and a neutral wire outlet end 173 for receiving the neutral wire are mounted on the additional housing 17, the neutral wire outlet end 173 and the outlet end 3 are arranged side by side, and the neutral wire inlet end 172 and the inlet end 2 are arranged in a staggered mode.
Further, the housing 1 includes a middle partition plate 11, the middle partition plate 11 dividing an inner space of the circuit breaker into a first-layer installation cavity 101 and a second-layer installation cavity 102; the middle partition plate 11 is provided with a heat dissipation hole 1101 for exhausting air of the arc extinguishing mechanism 5 near the arc extinguishing mechanism 5; the middle partition plate 11 is provided with an installation cavity 111 for installing the arc extinguishing mechanism 5, the installation cavity 111 is opened towards one end of the arc extinguishing mechanism 5, one end of the bottom of the installation cavity 111 protrudes and extends into the second layer installation cavity 102, and the radiating hole 1101 is formed in one end of the bottom of the installation cavity 111.
According to the invention, the components in the circuit breaker are arranged in a layered manner, the components in the circuit breaker are arranged again, the thickness of the circuit breaker is properly increased, the height of the circuit breaker is reduced, the working environment of the circuit breaker for communication is met, and obviously, the circuit breaker can also meet the requirements of special circuit breakers in other industries. The handle and the bimetallic strip component are arranged in the second layer of the mounting cavity, the handle and the bimetallic strip component are smaller than other elements in the thickness direction, the thickness of the shell in the thickness direction can be reduced, miniaturization of the circuit breaker is facilitated, and in addition, the wire inlet end and the wire outlet end are arranged in the same mounting cavity, so that internal wiring is facilitated; obviously, the positions of the handle and the wire outlet end can be interchanged, namely, the handle is arranged in the first layer of installation cavity, and the wire outlet end is arranged in the second layer of installation cavity. The circuit breaker has reasonable and compact layout of internal elements, safe and stable performance and low cost. The wire outlet end protrusion is arranged at the top of the shell, the wire outlet end is arranged at the top of the shell, the broken height is reduced by increasing the length, so that the working environment of the circuit breaker for communication is met, and the wire outlet end protrusion is arranged at the top of the shell and further plays a role in facilitating wiring. And the outgoing line end shell and the wiring terminal arranged in the outgoing line end shell are obliquely upwards, so that a user can conveniently wire. Through the improvement of the structural layout, when the circuit breaker is in a working state, the height reaches 37-40mm, the thickness is 25-30mm, the length is 95-100mm, the requirement of the working environment of the circuit breaker for foot communication is met, and the whole structure is more miniaturized. Preferably, the height of the circuit breaker is 40mm, the thickness is 27mm, and the length is 100mm. The jump button and the elastic reset mechanism are respectively positioned at the two sides of the jump button and are in linkage fit.
Drawings
Fig. 1 is a perspective view of the overall structure of the circuit breaker of the present invention;
Fig. 2 is a perspective view of the circuit breaker of the present invention with the bottom facing outward;
Fig. 3 is a perspective view of another aspect of the overall structure of the circuit breaker of the present invention;
Fig. 4 is a perspective view of the circuit breaker of the present invention in a use state;
Fig. 5 is a perspective view of the circuit breaker of the present invention with the addition of a neutral wire;
fig. 6 is a perspective view of the circuit breaker of the present invention with the bottom of the neutral wire facing outward;
fig. 7 is a side internal structural view of the circuit breaker of the present invention;
fig. 8 is another side internal structural view of the circuit breaker of the present invention;
Fig. 9 is a perspective view of the internal components of the circuit breaker of the present invention;
FIG. 10 is a perspective view of one side of the trip buckle of the present invention;
FIG. 11 is a perspective view of the other side of the trip buckle of the present invention;
FIG. 12 is a perspective view of the resilient return mechanism of the present invention;
FIG. 13 is a schematic front view of a separator of the present invention;
FIG. 14 is a schematic rear view of a separator in the present invention.
Detailed Description
Embodiments of the circuit breaker of the present invention are further described below with reference to the examples given in connection with fig. 1 to 14. The circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1 to 14, the circuit breaker of the present invention comprises a housing 1 and a handle 8 pivotally connected inside the housing 1 with one end extending outside the housing 1, a wire inlet end 2, a wire outlet end 3, an operating mechanism 4, an arc extinguishing mechanism 5, an electromagnetic system 6 and a bimetal assembly 7 mounted inside the housing 1.
As shown in fig. 1, 2, 7 and 8, the internal space of the circuit breaker of the invention is layered along the thickness direction of the circuit breaker in the working state, and comprises a first layer installation cavity 101 and a second layer installation cavity 102; the handle 8, the incoming line end 2, the outgoing line end 3, the operating mechanism 4, the arc extinguishing mechanism 5, the electromagnetic system 6 and the bimetallic strip assembly 7 are respectively arranged in the first layer installation cavity 101 and the second layer installation cavity 102. According to the invention, the components in the circuit breaker are arranged in a layered manner, the components in the circuit breaker are arranged again, the thickness of the circuit breaker is properly increased, the height of the circuit breaker is reduced, the working environment of the circuit breaker for communication is met, and obviously, the circuit breaker can also meet the requirements of special circuit breakers in other industries.
In particular, the improvement point of the circuit breaker is that the layout of the layering arrangement of the circuit breaker with overload and short-circuit protection functions on the single pole can obviously reduce the height of the circuit breaker so as to adapt to the requirement of the volume parameter of the circuit breaker for communication.
Specifically, as shown in fig. 3, 7 and 8, the housing 1 includes a middle partition 11, a base 12 and a cover 13, and the base 12 and the cover 13 are respectively buckled on two sides of the middle partition 11; the middle partition plate 11 divides the internal space of the circuit breaker into a first-layer installation cavity 101 and a second-layer installation cavity 102; the wire inlet end 2, the wire outlet end 3, the operating mechanism 4, the arc extinguishing mechanism 5 and the electromagnetic system 6 are arranged in the first layer installation cavity 101; the handle 8 and the bimetallic strip assembly 7 are arranged in the second layer installation cavity 102, and the handle 8 and the outlet terminal 3 are arranged at the top of the shell 1 along the thickness direction of the circuit breaker in an operating state. The handle 8 and the bimetallic strip assembly 7 are arranged in the second-layer installation cavity 102, the handle 8 and the bimetallic strip assembly 7 are smaller than other elements in the thickness direction, the thickness of the shell in the thickness direction can be reduced, miniaturization of the circuit breaker is facilitated, and in addition, the wire inlet end 2 and the wire outlet end 3 are arranged in the same installation cavity, so that internal wiring is facilitated. Of course, other arrangements are possible, for example, the positions of the handle 8 and the outlet 3 may be interchanged, i.e. the handle 8 is mounted in the first-stage mounting cavity 101 and the outlet 3 is mounted in the second-stage mounting cavity 102. For example, the electromagnetic system 6 and/or the incoming line end 2 may also be mounted in the second tier mounting chamber 102.
As shown in fig. 1,2, 7 and 8, the handle 8 and the wire outlet end 3 are arranged on one side of the shell 1, the electromagnetic system 6 is arranged under the wire outlet end 3, the electromagnetic system 6 is electrically connected with the wire outlet end 3, the operating mechanism 4 is arranged on one side of the electromagnetic system 6, the arc extinguishing mechanism 5 is arranged under the electromagnetic system 6, the bimetallic strip component 7 is arranged at the bottom of the shell 1 and is positioned under one side of the operating mechanism 4, the bimetallic strip component 7 is electrically connected with the wire inlet end 2, the bimetallic strip component 7 is electrically connected with the moving contact 9 through a wire, the fixed contact 10 is arranged under the electromagnetic system 6, the operating mechanism 4 is connected with the moving contact 9, the fixed contact 10 is arranged opposite to the moving contact 9, and the circuit breaker drives the fixed contact 10 and the moving contact 9 to be contacted and separated through the handle 8 so as to switch on and off a circuit. The circuit breaker has reasonable and compact layout of internal elements, safe and stable performance and low cost.
A schematic diagram of the circuit breaker of the invention in use is given in fig. 4. In use, the handle 8 and outlet 3 of the circuit breaker are oriented towards the user.
As shown in fig. 1-4, the wire outlet end 3 is protruded at the top of the shell 1, and comprises a wire outlet end shell 31 obliquely arranged at the top of the shell 1 and a wire connecting terminal installed in the wire outlet end shell 31, wherein the wire connecting terminal is obliquely arranged upwards; the wire outlet terminal housing 31 includes a first side 311 disposed parallel to the wire connection terminal of the wire outlet terminal 3 and a second side 312 disposed perpendicular to the wire connection terminal of the wire outlet terminal 3, the first side 311 is provided with a wire connection window 311a for connection, and the second side 312 is provided with a screw window 312a for mounting a wire connection screw. The wire outlet end 3 is protruded at the top of the shell 1, the wire outlet end is arranged at the top of the shell 1, the height of circuit breaking is reduced by increasing the length, so that the working environment of the circuit breaker for communication is met, and the wire outlet end 3 is protruded at the top of the shell 1 and further plays a role in facilitating wiring. And the wire outlet end shell 31 and the wiring terminals arranged in the wire outlet end shell 31 are inclined upwards, so that the user can conveniently wire.
Through the improvement of the structural layout, when the circuit breaker is in a working state, the height reaches 37-40mm, the thickness is 25-30mm, the length is 95-100mm, the requirement of the working environment of the circuit breaker for foot communication is met, and the whole structure is more miniaturized. Preferably, the height of the circuit breaker is 40mm, the thickness is 27mm, and the length is 100mm.
As shown in fig. 4-6, the housing may be added with a layer on one side of the base for placing the non-interruptible neutral conductor pole to form a single pole circuit breaker with an over-current protection pole and non-interruptible neutral conductor. The shell 1 is provided with an additional shell 17 buckled on one side of the outgoing line end 3, the additional shell 17 is provided with a neutral line incoming line end 172 and a neutral line outgoing line end 173 for receiving a neutral line, the neutral line outgoing line end 173 and the outgoing line end 3 are arranged side by side, and the neutral line incoming line end 172 and the incoming line end 2 are arranged in a staggered mode. Obviously, the circuit breaker can also be set as a multipole circuit breaker, and the circuit breaker can be connected in parallel on one side of the base in sequence. The connection terminal of the neutral wire inlet 172 and the connection terminal of the wire inlet 2 are arranged in a staggered manner, so that the bottom space of the circuit breaker is reasonably utilized. In particular, the terminals of the inlet terminals of the circuit breaker can be made as cage terminals, plug-in terminals (see fig. 6) or other structural types.
As shown in fig. 7-9, the operating mechanism 4 comprises a U-shaped rod 41, a lock catch 42, a jump button 43 and a bracket 44; the support 44 is pivotally connected to the shell 1, the lock catch 42 is pivotally connected to one side of the support 44 facing the bimetallic strip assembly 7, the lock catch 42 is located above the lock catch 43, one end of the U-shaped rod 41 passes through a first slot 103 on the middle partition plate 11 and is pivotally connected with the handle 8, the other end of the U-shaped rod is pivotally connected with the lock catch 42, the lock catch 43 and the lock catch 42 are in snap-fit connection, the support 44 is also pivotally connected with the moving contact 9, the fixed contact 10 is arranged below the electromagnetic system 6, the fixed contact 10 and the moving contact 9 are oppositely arranged, and the circuit breaker drives the fixed contact 10 and the moving contact 9 to contact and separate through the handle 8 to switch on and off a circuit. The whole structure of the operating mechanism is simple and compact, and the performance is safe and stable.
As shown in fig. 10-12, the jump button 43 includes a first end arm 431 and a second end arm 432, the first end arm 431 is in snap connection with the lock catch 42, the first end arm 431 is provided with a snap recess 4311 towards the lock catch 42, and the lock catch 42 is provided with a snap protrusion 4211 in snap connection with the snap recess 4311 towards the first end arm 431; the snap groove 4311 and the snap protrusion 4211 cooperate with each other to maintain the stable state of the operating mechanism, and the snap groove 4311 is a square groove, which is beneficial to the stability of the snap. The second end arm 432 is provided with a third end arm 433 which is in contact fit with the bimetallic strip 71 of the bimetallic strip assembly 7 towards the inner protrusion of one side of the second layer installation cavity 102, the third end arm 433 is provided with a touch boss 4331 towards one side of the bimetallic strip 71, and the contact fit between the bimetallic strip 71 and the trip buckle is facilitated through the touch boss 4331, so that the tripping operation is more stable and reliable. The middle partition plate 11 is provided with a third end arm 433 penetrating through a second slot 104 matched with the bimetallic strip 71, one end of the bimetallic strip 71 is fixed, the other end faces the touch boss 4331, and the middle partition plate 11 is provided with the second slot 104, so that the bimetallic strip 71 on one side can be in contact fit with the trip button 43 on the other side, and trip operation is completed. When overload fault occurs to the circuit, the bimetallic strip 71 generates heat and deforms to collide with the touch boss 4331 to drive the operating mechanism 4 to trip and cut off the circuit; the middle part of the jump button 43 is connected with an elastic reset mechanism 15 for resetting the jump button 43 towards the other side; the end of the second end arm 432 protrudes towards the other side and is provided with a limiting protrusion 4321, the limiting protrusion 4321 extends to one side of the moving contact 9 and is located below the bracket 44, and the limiting protrusion 4321 is used for limiting the moving distance of the bracket 44 and the moving contact 9. The jump buckle is arranged through the structure, so that the requirement of layering arrangement of the internal elements of the circuit breaker is met.
As shown in fig. 10-12, the elastic restoring mechanism 15 comprises a restoring mechanism body 151, the restoring mechanism body 151 is positioned on the other side of the bracket 44 and is arranged in parallel with the other side of the bracket 44, the restoring mechanism body 151 is provided with a pivot hole 1511 pivotally connected with the bracket 44, the upward extension of the restoring mechanism body 151 is provided with an elastic wing 152, and the elastic wing 152 comprises a wavy wing 1521 and a circular part 1522 at the end part of the wavy wing 1521; the elastic wings 152 are matched with the inner side wall of the shell 1 to realize the reset of the jump button, and the elastic wings 152 can also be set into other reset structures. The canceling release mechanical system body 151 is equipped with first supporting lug 153 towards the one side protrusion of jumping knot 43, the top protrusion of first supporting lug 153 is equipped with square installation piece 1531, one side of jumping knot 43 towards canceling release mechanical system body 151 is equipped with the second supporting lug, the middle part of second supporting lug is equipped with square installation groove 4341 with square installation piece 1531 installation complex, the top of square installation piece 1531 is equipped with rivet 1532, square installation groove 4341's bottom is sunken to be equipped with rivet 1532 riveting hole 4342, jumping knot 43 and canceling release mechanical system body 151 pivot connection simultaneously at support 44 linkage complex. Obviously, the jump button 43 and the elastic reset mechanism 15 may be fixedly connected, and the jump button 43 and the elastic reset mechanism 15 are respectively located at two sides of the jump button 43 and are in linkage fit.
As shown in fig. 7 and 8, the second-layer installation cavity 102 is further provided with a signal wire connection terminal 18, the signal wire connection terminal 18 is located below the arc extinguishing mechanism 5 at the bottom of the shell, and the signal wire connection terminal 18 is electrically connected with the electromagnetic system 6 through a wire for transmitting the on-off state information of the circuit breaker. The signal wire connecting terminals 18 are arranged in the second layer of mounting cavities with fewer elements distributed, and the structural arrangement is reasonable.
As shown in fig. 1 and 5, the circuit breaker of the invention, the handle 8 and the outlet terminal 3 are arranged side by side along the thickness direction of the shell; the electromagnetic system 6, the operating mechanism 4 and the arc extinguishing mechanism 5 are arranged along the length direction of the shell. The handle and the wire outlet end of the circuit breaker are arranged side by side along the thickness direction of the shell, so that the structure is more compact, the length and the height of the circuit breaker are reduced, and the circuit breaker is more suitable for the installation environment of the circuit breaker for communication.
Specifically, as shown in fig. 2 and 9, the signal wire connecting terminal 18, the wire outlet end 3 and the electromagnetic system 6 are positioned on the same side of the shell 1, the electromagnetic system 6 is positioned below the wire outlet end 3, and the wire outlet end 3 is connected with the electromagnetic system 6. Obviously, other layouts of the signal wire connecting terminal, the wire outlet terminal and the electromagnetic system are possible, and the wiring cost is correspondingly increased.
As shown in fig. 7 and 9, one end of the signal wire 181 is connected to the electromagnetic system 6, the middle partition 11 is provided with a signal wire through hole 1105 near the electromagnetic system 6 through which the other end of the signal wire 181 passes, and the other end of the signal wire 181 passes from the signal wire through hole 1105 to the second-layer mounting cavity 102 to be connected to the signal wire connection terminal 18 in the second-layer mounting cavity 102. Through set up the signal line through-hole on the middle baffle, the signal line is installed the wiring from the less second floor installation cavity of component, and the overall arrangement is more reasonable, and it is more convenient to connect. The middle partition 11 protrudes toward the second layer installation cavity 102 along the length direction of the shell, two parallel installation ribs 118 are protruded, and an installation groove 1181 of the signal wire 181 is formed between the two installation ribs 118. The mounting grooves 1181 mount and fix the signal wires, and the signal wire structure is stable and reliable.
As shown in fig. 4-6, the shell 1 is provided with an additional shell 17 fastened on one side of the outlet end 3, the additional shell 17 is provided with a neutral wire inlet end 172 and a neutral wire outlet end 173 for receiving the neutral wire, the handle 8, the outlet end 3 and the neutral wire outlet end 173 are arranged side by side, and the signal wire connecting terminal 18, the neutral wire inlet end 172 and the inlet end 2 are arranged in a staggered manner. The signal wire connecting terminal, the neutral wire inlet end and the wire inlet end are arranged in a staggered mode, and the problem that the connecting terminal is arranged side by side to bring inconvenience in connection is avoided. The wiring terminal of the outgoing line end 3, the wiring terminal of the incoming line end 2 and the signal line wiring terminal 18 are plug-in wiring terminals or cage wiring terminals.
As shown in fig. 13 to 14, the partition 11 of the circuit breaker of the present invention is provided with a heat dissipation hole 1101 for exhausting air from the arc extinguishing mechanism 5 near the arc extinguishing mechanism 5. According to the circuit breaker, the radiating holes are formed in the middle partition plate, when the arc extinguishing mechanism is used for extinguishing arc, the first layer of installation cavity and the second layer of installation cavity can be exhausted at the same time, high-temperature gas generated during arc extinguishing is rapidly exhausted, the arc extinguishing efficiency is improved, and the service life of the circuit breaker is prolonged.
As shown in fig. 1 to 3, the housing 1 is provided with an exhaust hole 1106 for exhausting air, in which the side wall of one side of the housing is provided with an exhaust hole 1106 near the first layer installation cavity and the second layer installation cavity, respectively, and the bottom of the side wall of the other side of the housing is provided with an exhaust hole 1106. The positions and the number of the exhaust holes 1106 can be adjusted according to the actual situation.
As shown in fig. 13-14, the middle partition 11 is provided with a mounting cavity 111 for mounting the arc extinguishing mechanism 5, the mounting cavity 111 is opened towards one end of the arc extinguishing mechanism 5, one end of the bottom of the mounting cavity 111 protrudes and extends into the second layer of mounting cavity 102, and the heat dissipation hole 1101 is formed in one end of the bottom of the mounting cavity 111. A installation cavity protrusion for installing arc extinguishing mechanism 5 stretches to the second floor's installation cavity of casing opposite side, and the space of rational utilization casing opposite side does benefit to the thickness that reduces the circuit breaker, and arc extinguishing mechanism can be to the more quick discharge arc extinguishing high-heat gas of second floor's installation cavity simultaneously, reduces the arc extinguishing time.
As shown in fig. 13-14, specifically, the bottom of the installation cavity 111 and the side wall of the installation cavity 111 near the middle of the housing 1 are provided with a plurality of strip-shaped heat dissipation holes 1102 arranged side by side. The bottom of the installation cavity and the side wall of the installation cavity, which is close to the middle part of the shell, are provided with strip-shaped heat dissipation holes, so that the heat dissipation area is increased. The heat dissipation holes may also be circular holes or the like. The side wall of the mounting cavity 111 is provided with a mounting protruding strip 1103 which is in clearance mounting fit with the arc extinguishing grid 501 of the arc extinguishing mechanism 5. The installation sand grip 1103 is used for the clearance installation cooperation with arc extinguishing bars piece 501, and the mounting structure of arc extinguishing mechanism is firm reliable. The bottom of the installation cavity 111 is provided with a supporting bar 1104 for supporting the arc extinguishing mechanism 5. The support bar 1104 is used for supporting the arc extinguishing mechanism 5, so that the arc extinguishing mechanism 5 is spaced from the bottom surface by a certain distance, and heat dissipation is facilitated.
As shown in fig. 9, the opening of the arc extinguishing mechanism 5 faces to the operating mechanism side, one end of the arc extinguishing mechanism 5 facing to the middle partition plate 11 is provided with a fixing plate 502 for fixing the arc extinguishing grid plate, and the other end forms an open notch 503 to face to a heat dissipation hole 1102 at the bottom of the mounting cavity 111. The lower half part of the arc extinguishing mechanism 5 is arranged in the mounting cavity 111, and the lower half part of the opening side of the arc extinguishing mechanism 5 is opposite to the heat dissipation hole 1102 on the side wall of the mounting cavity 111. Compared with the structure of the existing arc extinguishing chamber, the arc extinguishing mechanism is provided with the fixing plate 502 on one side of the bottom, and an open notch is formed on the other side of the bottom and is opposite to a radiating hole on the bottom of the installation cavity, so that exhaust is facilitated. In addition, the arc extinguishing mechanism is half extended into the installation cavity 111, and the lower half part of the opening side and the heat dissipation hole 1102 on the side wall of the installation cavity 111 are convenient for discharging gas.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a circuit breaker, including casing (1) and pivot connect in casing (1) inside and one end stretches out handle (8) outside casing (1), install inlet wire end (2) in casing (1), outlet wire end (3), operating device (4), arc extinguishing mechanism (5), electromagnetic system (6) and bimetallic strip subassembly (7), bimetallic strip subassembly (7) are connected with inlet wire end (2) electricity, electromagnetic system (6) are connected with outlet wire end (3) electricity, operating device (4) are connected with moving contact (9), contact and separation through handle (8) drive moving contact (9) and static contact (10) switch on and off the circuit; the method is characterized in that: the internal space of the breaker is layered along the thickness direction and comprises a first layer of mounting cavity (101) and a second layer of mounting cavity (102); the handle (8), the incoming line end (2), the outgoing line end (3), the operating mechanism (4), the arc extinguishing mechanism (5), the electromagnetic system (6) and the bimetallic strip assembly (7) are respectively arranged in the first layer installation cavity (101) and the second layer installation cavity (102), and the height of the circuit breaker is 37-40mm;
The wire inlet end (2), the wire outlet end (3), the operating mechanism (4), the arc extinguishing mechanism (5) and the electromagnetic system (6) are arranged in the first layer of installation cavity (101); the handle (8) and the bimetallic strip component (7) are arranged in the second layer installation cavity (102);
or the handle (8), the wire inlet end (2), the operating mechanism (4), the arc extinguishing mechanism (5) and the electromagnetic system (6) are arranged in the first layer of installation cavity (101); the wire outlet end (3) and the bimetallic strip component (7) are arranged in the second layer installation cavity (102);
or the wire inlet end (2), the wire outlet end (3), the operating mechanism (4) and the arc extinguishing mechanism (5) are arranged in the first layer of installation cavity (101); the electromagnetic system (6), the handle (8) and the bimetallic strip component (7) are arranged in the second layer installation cavity (102);
Or the electromagnetic system (6), the wire outlet end (3), the operating mechanism (4) and the arc extinguishing mechanism (5) are arranged in the first layer of installation cavity (101); the wire inlet end (2), the handle (8) and the bimetallic strip component (7) are arranged in the second layer installation cavity (102);
Or the wire outlet end (3), the operating mechanism (4) and the arc extinguishing mechanism (5) are arranged in the first layer of installation cavity (101); the wire inlet end (2), the electromagnetic system (6), the handle (8) and the bimetallic strip assembly (7) are arranged in the second-layer installation cavity (102).
2. The circuit breaker according to claim 1, characterized in that: the shell (1) comprises a middle partition plate (11), a base (12) and a cover (13), wherein the base (12) and the cover (13) are respectively buckled on two sides of the middle partition plate (11); the middle partition plate (11) divides the internal space of the circuit breaker into a first layer of installation cavity (101) and a second layer of installation cavity (102); the handle (8) and the wire outlet end (3) are arranged at the top of the shell (1) along the thickness direction of the circuit breaker in a working state, the handle (8) and the wire outlet end (3) are arranged at one side of the shell (1), the electromagnetic system (6) is arranged under the wire outlet end (3), the operating mechanism (4) is arranged at one side of the electromagnetic system (6), the arc extinguishing mechanism (5) is arranged under the electromagnetic system (6), and the bimetallic strip component (7) is arranged at the bottom of the shell (1) and is arranged under one side of the operating mechanism (4).
3. A circuit breaker according to claim 1 or 2, characterized in that: the wire outlet end (3) is arranged at the top of the shell (1) in a protruding mode, the wire outlet end (3) comprises a wire outlet end shell (31) obliquely arranged at the top of the shell (1) and a wiring terminal arranged in the wire outlet end shell (31), and the wiring terminal is obliquely arranged upwards; the wire outlet end shell (31) comprises a first side surface (311) which is parallel to the wiring terminal of the wire outlet end (3) and a second side surface (312) which is perpendicular to the wiring terminal of the wire outlet end (3), a wiring window (311 a) for wiring is formed in the first side surface (311), and a screw window (312 a) for installing a wiring screw is formed in the second side surface (312).
4. The circuit breaker according to claim 1, characterized in that: the thickness of the breaker is 25-30mm, and the length is 95-100mm.
5. The circuit breaker according to claim 2, characterized in that: the operating mechanism (4) comprises a U-shaped rod (41), a lock catch (42), a jump buckle (43) and a bracket (44); support (44) pivoted connection is on casing (1), hasp (42), jump knot (43) pivoted connection is in one side of support (44) orientation bimetallic strip subassembly (7), hasp (42) are located the top of jump knot (43), first fluting (103) and handle (8) pivoted connection on the baffle (11) are passed to one end of U type pole (41), the other end and hasp (42) pivoted connection, jump knot (43) and hasp (42) snap connection, still pivoted connection has moving contact (9) on support (44), stationary contact (10) are installed to the below of electromagnetic system (6), stationary contact (10) and moving contact (9) are relative to set up.
6. The circuit breaker of claim 5, wherein: the jump button (43) comprises a first end arm (431) and a second end arm (432), the first end arm (431) is in snap connection with the lock catch (42), the first end arm (431) is provided with a snap groove (4311) towards the lock catch (42), and the lock catch (42) is provided with a snap protrusion (4211) in snap connection with the snap groove (4311) towards the first end arm (431); a third end arm (433) in contact fit with a bimetallic strip (71) of the bimetallic strip assembly (7) is arranged in a protruding mode on one side, facing the second layer installation cavity (102), of the second end arm (432), a touch boss (4331) is arranged in a protruding mode on one side, facing the bimetallic strip (71), of the third end arm (433), a middle partition plate (11) is provided with a second slot (104) in which the third end arm (433) penetrates, matching with the bimetallic strip (71), one end of the bimetallic strip (71) is fixed, one side, facing the touch boss (4331), of the other end of the bimetallic strip (71) faces the touch boss (4331), and when overload faults occur to the circuit, the bimetallic strip (71) is deformed in a heating mode and collides with the touch boss (4331) to drive an operating mechanism (4) to trip and cut off the circuit; the middle part of the jump button (43) faces the other side, and is connected with an elastic reset mechanism (15) for resetting the jump button (43); the end part of the second end arm (432) protrudes towards the other side and is provided with a limiting protrusion (4321), and the limiting protrusion (4321) extends to one side of the moving contact (9) and is positioned below the bracket (44).
7. The circuit breaker of claim 6, wherein: the elastic reset mechanism (15) comprises a reset mechanism body (151), the reset mechanism body (151) is arranged on the other side of the bracket (44) and is parallel to the other side of the bracket (44), the reset mechanism body (151) is provided with a pivot hole (1511) which is pivotally connected with the bracket (44), the reset mechanism body (151) is provided with elastic wings (152) in an upward extending mode, and the elastic wings (152) comprise wavy wings (1521) and round parts (1522) at the ends of the wavy wings (1521); the utility model discloses a reset mechanism body, including reset mechanism body (151) and reset mechanism body (151), reset mechanism body (151) is equipped with first supporting lug (153) towards one side protrusion of jumping knot (43), the top protrusion of first supporting lug (153) is equipped with square installation piece (1531), one side of jumping knot (43) towards reset mechanism body (151) is equipped with the second supporting lug, the middle part of second supporting lug is equipped with square mounting groove (4341) with square installation piece (1531) installation complex, the top of square installation piece (1531) is equipped with rivet (1532), the bottom of square mounting groove (4341) is sunken to be equipped with rivet hole (4342) of rivet (1532) riveting complex, jump knot (43) and reset mechanism body (151) simultaneous pivot connection at support (44) linkage cooperation.
8. The circuit breaker according to claim 2, characterized in that: the shell (1) is provided with an additional shell (17) buckled on one side of the outgoing line end (3), the additional shell (17) is provided with a neutral line incoming line end (172) and a neutral line outgoing line end (173) which are used for connecting a neutral line, the neutral line outgoing line end (173) and the outgoing line end (3) are arranged side by side, and the neutral line incoming line end (172) and the incoming line end (2) are arranged in a staggered mode.
9. The circuit breaker according to claim 1, characterized in that: the shell (1) comprises a middle partition plate (11), and the middle partition plate (11) divides the internal space of the circuit breaker into a first layer of installation cavity (101) and a second layer of installation cavity (102); the middle partition plate (11) is provided with a heat dissipation hole (1101) for exhausting the arc extinguishing mechanism (5) at a position close to the arc extinguishing mechanism (5); the installation cavity (111) for installing the arc extinguishing mechanism (5) is arranged on the middle partition plate (11), the installation cavity (111) is opened towards one end of the arc extinguishing mechanism (5), one end of the bottom of the installation cavity (111) protrudes and stretches into the second layer of installation cavity (102), and the heat dissipation hole (1101) is formed in one end of the bottom of the installation cavity (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711051606.8A CN109727831B (en) | 2017-10-31 | 2017-10-31 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711051606.8A CN109727831B (en) | 2017-10-31 | 2017-10-31 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109727831A CN109727831A (en) | 2019-05-07 |
| CN109727831B true CN109727831B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711051606.8A Active CN109727831B (en) | 2017-10-31 | 2017-10-31 | Circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN109727831B (en) |
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| CN106548912B (en) * | 2015-09-22 | 2019-08-09 | 浙江正泰电器股份有限公司 | Breaker |
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| CN109727831A (en) | 2019-05-07 |
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