CN113035632B - Circuit breaker and resistor fracture transmission structure thereof - Google Patents
Circuit breaker and resistor fracture transmission structure thereof Download PDFInfo
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- CN113035632B CN113035632B CN201911348292.7A CN201911348292A CN113035632B CN 113035632 B CN113035632 B CN 113035632B CN 201911348292 A CN201911348292 A CN 201911348292A CN 113035632 B CN113035632 B CN 113035632B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 218
- 230000009351 contact transmission Effects 0.000 claims description 22
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000033001 locomotion Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
- H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
Abstract
The invention relates to a circuit breaker and a resistor fracture transmission structure thereof. The resistor fracture transmission structure of the circuit breaker comprises a transmission crank arm, a driving lever and an intermediate transmission rod; the transmission crank arm is provided with a fixed hinge point, an input hinge point, a first output hinge point and a second output hinge point; the driving lever is provided with a hinged end and a contact driving end; a resistance contact connecting rod is hinged between the contact driving end and the resistance contact assembly arranged in a guiding manner, one end of the middle transmission rod is hinged on the second output hinge point, and the other end of the middle transmission rod is hinged between the hinge end of the driving lever and the contact driving end and used for driving the driving lever to swing in a lever-wasting manner when the transmission crank arm swings. The moving speed of the resistance contact connecting rod can be increased through the labor-consuming lever, the speed requirement on a resistance moving contact of a resistance fracture is met, and the circuit breaker is few in parts of a driving mechanism required by the circuit breaker, simple in structure and low in manufacturing cost.
Description
Technical Field
The invention relates to a circuit breaker and a resistor fracture transmission structure thereof.
Background
High voltage circuit breaker is important electrical equipment among the power system, and in high voltage circuit breaker closing operation process, can produce the overvoltage on the power transmission line, the harm of overvoltage lies in: the electrical equipment on the transmission line is easily damaged, and the stable operation of the power system is influenced. In order to limit and eliminate the overvoltage on the transmission line, a closing resistor is usually connected in parallel in the main loop, and a resistor break connected in series with the closing resistor is arranged to control the connection and disconnection of the closing resistor and the power system. Before the main fracture is switched on, the resistor fracture is switched on first, overvoltage is consumed on a switching-on resistor, and when the main fracture is switched on, the voltages at two ends of the main fracture are normal. When the breaker is opened, the resistor fracture is required to be opened before the main fracture, namely, the resistor fracture is opened first and closed first. In order to ensure the opening and closing time sequence of the resistor fracture and the main fracture, the circuit breaker generally adopts a mode that a moving contact of the main fracture and a moving contact of the resistor fracture are driven by the same set of driving mechanism.
The high-voltage circuit breaker is disclosed in Chinese invention patent application with application publication number CN106024505A and application publication date 2016, 10, 12. The circuit breaker comprises a fixed rack, a driving mechanism, a transmission structure and a fracture unit, wherein the fracture unit comprises a main fracture and a resistance fracture, a resistance static contact in the resistance fracture is fixed on the fixed rack through a spring, the elastic direction of the spring is the same as the movement direction of a resistance moving contact in the resistance fracture, when the resistance fracture is switched on, the resistance moving contact drives a resistance static contact to compress the spring, and when the resistance fracture is switched off, the spring is decompressed and drives the resistance static contact to reset. The transmission structure comprises a driving contact rod transmission rod and a resistance moving contact rod transmission rod which are arranged in parallel, and the driving contact transmission rod and the resistance moving contact transmission rod respectively realize the opening and closing operation of the main fracture and the resistance fracture in a direct-acting mode.
In order to ensure that the resistor fracture is opened before the main fracture, the moving speed of the resistor moving contact during opening needs to be greater than the reset speed of the resistor static contact under the action of the elastic force of the spring. In the circuit breaker, switching on and off of the resistor fracture are realized in a direct-acting mode, which requires that an output end of the driving mechanism has a high movement speed, and the driving mechanism with the output end having the high movement speed generally has more parts, heavy structure and higher manufacturing cost.
Disclosure of Invention
The invention aims to provide a resistor fracture transmission structure of a circuit breaker, which is used for solving the problems of more parts, heavy structure and higher manufacturing cost of a driving mechanism required by the circuit breaker in the prior art.
In order to achieve the purpose, the technical scheme of the resistor fracture transmission structure of the circuit breaker is as follows: the circuit breaker resistor fracture transmission structure comprises a transmission crank arm, a driving lever and an intermediate transmission rod; the transmission crank arm comprises a first transmission arm and a second transmission arm which are arranged in an L shape, and a fixed hinge point is arranged at the joint of the first transmission arm and the second transmission arm; the first transmission arm is provided with an input hinge point, and the input hinge point is used for being connected with the driving mechanism to realize the swing of the transmission crank arm; the second transmission arm is provided with a first output hinge point for being in transmission connection with a main contact of the circuit breaker and a second output hinge point for being in transmission connection with a resistance contact of the circuit breaker; the driving lever is positioned on one side of the transmission crank arm, which is close to the resistor fracture, and is provided with a hinged end and a contact driving end; a resistance contact connecting rod is hinged between the contact driving end and the resistance contact assembly arranged in a guiding manner, the driving lever, the resistance contact connecting rod and the resistance contact assembly form a crank slider mechanism, and the crank slider mechanism is used for driving the resistance contact assembly to stretch and retract in a guiding manner when the driving lever swings; and one end of the middle transmission rod is hinged on the second output hinged point, and the other end of the middle transmission rod is hinged between the hinged end of the driving lever and the contact driving end and is used for driving the driving lever to swing in a labor-consuming lever mode when the transmission crank arm swings.
The resistor fracture transmission structure of the circuit breaker has the beneficial effects that: the driving lever, the intermediate transmission rod and the resistance contact connecting rod form a labor-consuming lever, namely the hinged end forms a fulcrum, the hinged end and a part of the intermediate transmission rod between hinged points of the driving lever form a power arm, the intermediate transmission rod forms power to the force output by the driving lever, the driving lever between the hinged end and the contact driving end forms a resistance arm, the resistance contact connecting rod forms resistance to the force applied by the driving lever to block the rotation of the driving lever, the moving speed of the resistance contact connecting rod can be increased through the labor-consuming lever form, the speed requirement on a resistance moving contact of a resistance fracture is met, and compared with the form of arranging the driving mechanism with higher moving speed to meet the speed requirement of the resistance moving contact of the resistance fracture, the driving mechanism required by the circuit breaker has fewer parts, simple structure and low manufacturing cost.
Further, the hinged end of the actuating lever is located on the side of the main contact axis facing away from the resistance contact.
The lever ratio adjusting device has the advantage of being convenient to design a proper lever ratio.
Furthermore, the resistance fracture transmission structure of the circuit breaker further comprises a first transmission rod hinged at the first output hinge point, the first transmission rod is hinged with a driving contact rod of the main contact to drive the driving contact rod to move when the transmission driving lever rotates, the first transmission rod and the driving contact rod are located in a main contact transmission plane, the driving lever is located in a resistance contact transmission plane, the main contact transmission plane and the resistance contact transmission plane are coplanar, and an avoiding channel used for avoiding the main contact rod and/or the first transmission rod is arranged on the driving lever.
The device has the advantages of balanced stress, avoidance of clamping stagnation and guarantee of reliable action.
Furthermore, the resistor fracture is located right below the main fracture in the axial direction of the transmission crank arm.
The method has the advantage of optimizing the utilization of space.
Further, the intermediate transmission rod is coplanar with the main contact transmission plane and the resistance contact transmission plane.
The transmission structure has the beneficial effects that the working reliability of the transmission structure is prevented from being influenced by the eccentric force of the driving lever.
Furthermore, the driving lever is provided with an opening position and a closing position which respectively correspond to the opening state and the closing state of the resistance contact, and the opening position and the closing position are symmetrical about a plane vertical to the guide direction of the resistance contact.
The driving lever has the advantages that the driving lever has larger component force for driving the resistance contact to be switched on and off, and the requirement on the power of the driving mechanism is reduced.
In order to achieve the purpose, the technical scheme of the circuit breaker is as follows: the circuit breaker comprises a first fracture unit and a second fracture unit which are bilaterally symmetrical, each fracture unit is correspondingly provided with a resistor fracture transmission structure of the circuit breaker, and the resistor fracture transmission structure of the circuit breaker comprises a transmission crank arm, a driving lever and an intermediate transmission rod; the transmission crank arm comprises a first transmission arm and a second transmission arm which are arranged in an L shape, and a fixed hinge point is arranged at the joint of the first transmission arm and the second transmission arm; the first transmission arm is provided with an input hinge point, and the input hinge point is used for being connected with the driving mechanism to realize the swing of the transmission crank arm; the second transmission arm is provided with a first output hinge point for being in transmission connection with a main contact of the circuit breaker and a second output hinge point for being in transmission connection with a resistance contact of the circuit breaker; the driving lever is positioned on one side of the transmission crank arm, which is close to the resistor fracture, and is provided with a hinged end and a contact driving end; a resistance contact connecting rod is hinged between the contact driving end and the resistance contact assembly arranged in a guiding manner, the driving lever, the resistance contact connecting rod and the resistance contact assembly form a crank slider mechanism, and the crank slider mechanism is used for driving the resistance contact assembly to stretch and retract in a guiding manner when the driving lever swings; and one end of the middle transmission rod is hinged on the second output hinged point, and the other end of the middle transmission rod is hinged between the hinged end of the driving lever and the contact driving end and is used for driving the driving lever to swing in a labor-consuming lever mode when the transmission crank arm swings.
The circuit breaker has the beneficial effects that: the driving lever, the intermediate transmission rod and the resistance contact connecting rod form a labor-consuming lever, namely the hinged end forms a fulcrum, the hinged end and a part of the intermediate transmission rod between hinged points of the driving lever form a power arm, the intermediate transmission rod forms power to the force output by the driving lever, the driving lever between the hinged end and the contact driving end forms a resistance arm, the resistance contact connecting rod forms resistance to the force applied by the driving lever to block the rotation of the driving lever, the moving speed of the resistance contact connecting rod can be increased through the labor-consuming lever form, the speed requirement on a resistance moving contact of a resistance fracture is met, and compared with the form of arranging the driving mechanism with higher moving speed to meet the speed requirement of the resistance moving contact of the resistance fracture, the driving mechanism required by the circuit breaker has fewer parts, simple structure and low manufacturing cost.
Further, the hinged end of the actuating lever is located on the side of the main contact axis facing away from the resistance contact.
The lever ratio adjusting device has the advantage of being convenient to design a proper lever ratio.
Furthermore, the resistance fracture transmission structure of the circuit breaker further comprises a first transmission rod hinged at the first output hinge point, the first transmission rod is hinged with a driving contact rod of the main contact to drive the driving contact rod to move when the transmission driving lever rotates, the first transmission rod and the driving contact rod are located in a main contact transmission plane, the driving lever is located in a resistance contact transmission plane, the main contact transmission plane and the resistance contact transmission plane are coplanar, and an avoiding channel used for avoiding the main contact rod and/or the first transmission rod is arranged on the driving lever.
The device has the advantages of balanced stress, avoiding clamping stagnation and ensuring reliable action.
Furthermore, the resistor fracture is located right below the main fracture in the axial direction of the transmission crank arm.
The method has the advantage of optimizing the utilization of space.
Further, the intermediate transmission rod is coplanar with the main contact transmission plane and the resistance contact transmission plane.
The transmission structure has the beneficial effects that the working reliability of the transmission structure is prevented from being influenced by the eccentric force of the driving lever.
Furthermore, the driving lever is provided with an opening position and a closing position which respectively correspond to the opening state and the closing state of the resistance contact, and the opening position and the closing position are symmetrical about a plane vertical to the guide direction of the resistance contact.
The driving lever has the advantages that the driving lever has larger component force for driving the resistance contact to be switched on and off, and the requirement on the power of the driving mechanism is reduced.
Furthermore, the resistance fracture transmission structure corresponding to the first fracture unit comprises a left transmission connecting lever, the resistance fracture transmission structure corresponding to the second fracture unit comprises a right transmission connecting lever, the left transmission connecting lever is parallel to the swing axis of the right transmission connecting lever, and the left transmission connecting lever and the right transmission connecting lever are staggered along the swing axis of the connecting lever;
the first transmission arm and the second transmission arm of the left transmission crank arm are arranged along the swing axis of the transmission crank arm in a staggered mode, and the first transmission arm and the second transmission arm of the right transmission crank arm are arranged along the swing axis of the transmission crank arm in a staggered mode, so that the first transmission arms of the left transmission crank arm and the right transmission crank arm are coplanar.
This has the benefit of reducing the space required for the fracture and facilitating the deployment of other structures.
Drawings
Figure 1 is a schematic diagram of one embodiment of the circuit breaker of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the transmission structure of the resistor break in fig. 1 (when the resistor break is in an open state);
fig. 3 is a schematic structural diagram of a partial structure of the transmission structure of the resistor break in fig. 1 according to an embodiment (when the resistor break is in a closed state);
in the figure: 1. the driving device comprises an insulating connecting rod, 2, a right driving crank arm, 21, a fixed hinged joint, 22, a second output hinged joint, 23, a first output hinged joint, 24, an input hinged joint, 3, a first driving rod, 4, a driving contact rod, 5, a middle driving rod, 6, a driving lever, 61, a driving lever hinged joint, 62, a driving rod hinged joint, 63, a driving lever power output point, 7, a resistance contact connecting rod, 8, a resistance moving contact rod, 9, a driving swing arm, 10, a left driving crank arm, M, a main fracture, N and a resistance fracture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present application are described in further detail below with reference to examples.
As shown in fig. 1 and 2, a specific embodiment of the circuit breaker of the present invention includes a fixed rack (not shown in the figure), a driving mechanism, a transmission structure, and a fracture unit, where the fracture unit includes a first fracture unit and a second fracture unit that are bilaterally symmetric, and each fracture unit is provided with a corresponding resistance fracture transmission structure, and the second fracture unit located on the right side of fig. 1 and the corresponding fracture transmission structure are taken as an example for description below. Fracture transmission structure includes right transmission connecting lever 2, and right transmission connecting lever 2 is including being first transmission arm and the second transmission arm that L shape was arranged, and the junction of first transmission arm and second transmission arm has and is used for fixing fixed pin joint 21 in fixed frame, and the one end that fixed pin joint 21 was kept away from to first transmission arm is equipped with and is used for with insulating connecting rod 1 articulated input pin joint 24. The second transmission arm is provided with a first output hinge point 23 in transmission connection with the active contact rod 4 of the main fracture M, the first output hinge point 23 is hinged with a first transmission rod 3, one end of the first transmission rod 3 is hinged on the first output hinge point 23, and the other end of the first transmission rod 3 is hinged with the active contact rod 4 so as to drive the active contact rod 4 to move along the extending direction of the active contact rod 4 in a guiding manner. A second output hinge point 22 is provided on the second transmission arm between the first output hinge point 23 and the fixed hinge point 21.
The resistor fracture transmission structure of the circuit breaker further comprises a driving lever 6, the driving lever 6 is located on one side, close to the resistor fracture N, of the right transmission connecting lever 2, the upper end of the driving lever 6 is provided with a driving lever hinge point 61 for being hinged to the fixed rack, and the upper end of the driving lever 6 forms a hinge end. The right transmission connecting lever 2 is hinged with the middle transmission rod 5 at the second output hinge point 22, the driving lever 6 is provided with a transmission rod hinge point 62 for the middle transmission rod 5 to hinge, and the middle transmission rod 5 is used for applying force for forcing the driving lever 6 to rotate around the driving lever hinge point 61 in a direction opposite to the rotating direction of the right transmission connecting lever 2 when the right transmission connecting lever 2 drives the middle transmission rod 5 to rotate around the fixed hinge point 21. The lower end of the driving lever 6 is provided with a driving lever power output point 63, a resistance contact connecting rod 7 is hinged on the driving lever power output point 63, one end of the resistance contact connecting rod 7 is hinged on the driving lever power output point 63, the other end of the resistance contact connecting rod 7 is hinged with a resistance moving contact rod 8 of the resistance fracture N so as to drive the resistance moving contact rod 8 to move in a guiding mode along the extending direction of the resistance moving contact rod 8, and the lower end of the driving lever 6 forms a contact driving end.
When the right transmission connecting lever 2 rotates around the fixed hinge point 21, the first output hinge point 23 and the second output hinge point 22 rotate around the fixed hinge point 21 together, the second output hinge point 22 is closer to the fixed hinge point 21 than the first output hinge point 23, and the linear velocity of the second output hinge point 22 is smaller than that of the first output hinge point 23, if the intermediate transmission rod 5 is directly hinged to the resistance contact connecting rod 7, the velocity of the resistance movable contact rod 8 is slower, and the time sequence that the resistance fracture N is firstly opened relative to the corresponding main fracture M is difficult to realize in practical engineering application. Therefore, by providing the driving lever 6, the intermediate transmission rod 5 and the resistance contact connecting rod 7 form a laborious lever, i.e. the hinge point 61 of the driving lever forms a fulcrum, the driving lever between the hinge point 61 of the driving lever and the hinge point 62 of the transmission rod forms a power arm, the force output by the intermediate transmission rod 5 to the driving lever 6 forms a power, the driving lever between the power output point 63 of the driving lever and the hinge point 61 of the driving lever forms a resistance arm, the force applied by the resistance contact connecting rod 7 to the driving lever 6 to hinder the rotation of the driving lever 6 forms a resistance, and the moving speed of the resistance moving contact rod 8 is increased in the form of the laborious lever.
The working principle of the resistor fracture transmission structure of the circuit breaker is as follows: as shown in fig. 2 and 3, the moving direction of the active contact rod 4 in fig. 2 is rightward when switching on, leftward when switching off, upward when perpendicular to the direction from the resistive moving contact rod 8 to the moving contact rod 4, and downward when perpendicular to the direction from the resistive moving contact rod 8 to the moving contact rod 4. The insulating connecting rod 1 moves upwards under the driving of the power unit to push the right transmission connecting lever 2 to rotate clockwise around the fixed hinge point 21, the first output hinge point 23 on the right transmission connecting lever 2 drives the main moving contact rod 4 to move rightwards through the first transmission rod 3, the right transmission connecting lever 2 rotates clockwise around the fixed hinge point 21, at the moment, the middle transmission rod 5 moves rightwards to push the driving lever 6 to rotate anticlockwise around the driving lever hinge point 61, the driving lever power output point 63 on the driving lever 6 swings anticlockwise, the driving lever power output point 63 drives the resistance moving contact rod 8 to move rightwards through the resistance contact connecting rod 7, and the synchronous action of the main moving contact rod 4 and the resistance moving contact rod 8 is realized. The transmission swing arm 9 is an L-shaped swing arm, a hinge hole for being hinged to the fixed rack is formed in the inflection point of the transmission swing arm, one end of the transmission swing arm 9 is a power input end, and the power input end is hinged to the output end of the driving mechanism so as to drive the transmission swing arm 9 to rotate around the hinge hole when the driving mechanism acts. The other end of the transmission swing arm 9 is hinged with the two insulation connecting rods 1 at the same time, so that the insulation connecting rods 1 are driven to move when the transmission swing arm 9 rotates, and in the whole opening and closing process, the transmission structure converts the motion of the insulation connecting rods 1 into the horizontal motion of the main moving contact rod 4 and the resistance moving contact rod 8.
As shown in fig. 1, the resistor fracture transmission structure corresponding to the first fracture unit includes a left transmission connecting lever 10, the left transmission connecting lever 10 is parallel to the swing axis of the right transmission connecting lever 2, and the left transmission connecting lever 10 and the right transmission connecting lever 2 are staggered along the swing axis of the connecting lever. The first transmission arm and the second transmission arm of the right transmission crank arm 2 are arranged along the swing axis of the transmission crank arm in a staggered mode, the first transmission arm and the second transmission arm of the left transmission crank arm 10 are arranged along the swing axis of the transmission crank arm in a staggered mode, and therefore the first transmission arms of the left transmission crank arm 10 and the right transmission crank arm 2 are coplanar. In other embodiments, the first transmission arms of the left transmission crank arm and the right transmission crank arm may not be coplanar, and at this time, the first transmission arm and the second transmission arm may be arranged in a staggered manner along the swing axis of the transmission crank arm, or may not be arranged in a staggered manner.
In this embodiment, the first transmission rod 3 and the driving contact rod 4 are located in a main contact transmission plane, the driving lever 6 is located in a resistance contact transmission plane, the main contact transmission plane is coplanar with the resistance contact transmission plane, the hinged end of the driving lever 6 is located on one side of the axis of the main contact, which faces away from the resistance contact, and an avoidance channel for avoiding the main contact rod 4 and the first transmission rod 3 is arranged on the driving lever 6 to avoid the driving lever from interfering with the opening and closing of the main contact.
In this embodiment, when the fracture unit is in the opening state and the closing state, the driving levers 6 correspond to the opening position and the closing position, respectively, the driving levers 6 at the opening position and the closing position are located on the left and right sides of the hinge point 61 of the driving lever in the left and right directions and are symmetrical about a plane perpendicular to the guiding direction of the resistive contact, and in other embodiments, other forms may be adopted, for example, when the fracture unit is in the opening and closing state, the power output points of the driving levers are located on the same side of the hinge point of the driving lever in the horizontal direction, or when the driving levers are in the opening position and the closing position, the driving levers are located on the left and right sides of the hinge point of the driving lever, respectively, but an angle formed between planes perpendicular to the guiding direction of the resistive contact has an angle difference.
The structure of the transmission structure of the resistor break of the circuit breaker is the same as that of the transmission structure of the resistor break in the specific embodiment of the circuit breaker, and the description is omitted.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (5)
1. Resistance fracture transmission structure of circuit breaker, its characterized in that: comprises a transmission crank arm, a driving lever and an intermediate transmission rod; the transmission crank arm comprises a first transmission arm and a second transmission arm which are arranged in an L shape, and a fixed hinge point is arranged at the joint of the first transmission arm and the second transmission arm; the first transmission arm is provided with an input hinge point, and the input hinge point is used for being connected with the driving mechanism to realize the swing of the transmission crank arm;
the second transmission arm is provided with a first output hinge point for being in transmission connection with a main contact of the circuit breaker and a second output hinge point for being in transmission connection with a resistance contact of the circuit breaker; the driving lever is positioned on one side, close to the resistor fracture, of the transmission connecting lever and is provided with a hinged end and a contact driving end, the hinged end of the driving lever is hinged to a fixed rack of the corresponding circuit breaker, a resistor contact connecting rod is hinged between the contact driving end and a resistor contact assembly arranged in a guiding mode, the driving lever, the resistor contact connecting rod and the resistor contact assembly form a crank-slider mechanism, and the crank-slider mechanism is used for driving the resistor contact assembly to stretch and retract in a guiding mode when the driving lever swings; the middle transmission rod, one end of which is hinged on the second output hinge point and the other end of which is hinged between the hinge end of the driving lever and the contact drive end, is used for driving the driving lever to swing in a labor-consuming lever manner when the driving crank arm swings, the hinge end of the driving lever is positioned on one side of the axis of the main contact, which is back to the resistance contact, the resistance fracture transmission structure of the circuit breaker further comprises a first transmission rod hinged at the first output hinge point, the first transmission rod is hinged with the driving contact rod of the main contact to drive the driving contact rod to move when the driving lever rotates, the first transmission rod and the driving contact rod are positioned in a main contact transmission plane, the driving lever is positioned in the resistance contact transmission plane, the main contact transmission plane is coplanar with the resistance contact transmission plane, and the driving lever is provided with an avoiding channel for avoiding the driving contact rod and/or the first transmission rod, the driving lever is provided with an opening position and a closing position which respectively correspond to the opening state and the closing state of the resistance contact, and the opening position and the closing position are symmetrical about a plane vertical to the guide direction of the resistance contact.
2. The resistor break transmission structure of a circuit breaker according to claim 1, characterized in that: the resistor fracture is located right below the main fracture in the axial direction of the transmission crank arm.
3. The resistor break transmission structure of a circuit breaker according to claim 1, characterized in that: the intermediate drive link is coplanar with the main contact drive plane and the resistive contact drive plane.
4. The circuit breaker, including bilateral symmetry's first fracture unit and second fracture unit, its characterized in that: each breaking unit is correspondingly provided with a resistor breaking transmission structure of the circuit breaker as claimed in any one of claims 1-3.
5. The circuit breaker of claim 4, wherein:
the resistor fracture transmission structure corresponding to the first fracture unit comprises a left transmission connecting lever, the resistor fracture transmission structure corresponding to the second fracture unit comprises a right transmission connecting lever, the left transmission connecting lever is parallel to the swing axis of the right transmission connecting lever, and the left transmission connecting lever and the right transmission connecting lever are staggered along the swing axis of the connecting lever;
the first transmission arm and the second transmission arm of the left transmission crank arm are arranged along the swing axis of the transmission crank arm in a staggered mode, and the first transmission arm and the second transmission arm of the right transmission crank arm are arranged along the swing axis of the transmission crank arm in a staggered mode, so that the first transmission arms of the left transmission crank arm and the right transmission crank arm are coplanar.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348292.7A CN113035632B (en) | 2019-12-24 | 2019-12-24 | Circuit breaker and resistor fracture transmission structure thereof |
| PCT/CN2020/134364 WO2021129369A1 (en) | 2019-12-24 | 2020-12-07 | Circuit breaker and resistor break transmission structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348292.7A CN113035632B (en) | 2019-12-24 | 2019-12-24 | Circuit breaker and resistor fracture transmission structure thereof |
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| CN113035632A CN113035632A (en) | 2021-06-25 |
| CN113035632B true CN113035632B (en) | 2022-09-02 |
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| WO (1) | WO2021129369A1 (en) |
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| US4499350A (en) * | 1982-05-27 | 1985-02-12 | Tokyo Shibaura Denki Kabushiki Kaisha | Circuit breaker with overvoltage suppression |
| CN105047489A (en) * | 2015-06-30 | 2015-11-11 | 河南平高电气股份有限公司 | Circuit breaker break transmission device and circuit breaker using same |
| CN111105954A (en) * | 2018-10-29 | 2020-05-05 | 平高集团有限公司 | High-voltage switch and fracture structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896495Y (en) * | 2006-03-20 | 2007-05-02 | 西安西开高压电气股份有限公司 | Arc-chutes of 800 kv double-fracture can-type circuit breaker |
| CN111105951B (en) * | 2018-10-29 | 2022-07-05 | 平高集团有限公司 | High-voltage switch and resistance static contact thereof |
| CN112349521A (en) * | 2019-08-09 | 2021-02-09 | 河南平芝高压开关有限公司 | Circuit breaker and resistor fracture contact thereof |
-
2019
- 2019-12-24 CN CN201911348292.7A patent/CN113035632B/en active Active
-
2020
- 2020-12-07 WO PCT/CN2020/134364 patent/WO2021129369A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499350A (en) * | 1982-05-27 | 1985-02-12 | Tokyo Shibaura Denki Kabushiki Kaisha | Circuit breaker with overvoltage suppression |
| CN105047489A (en) * | 2015-06-30 | 2015-11-11 | 河南平高电气股份有限公司 | Circuit breaker break transmission device and circuit breaker using same |
| CN111105954A (en) * | 2018-10-29 | 2020-05-05 | 平高集团有限公司 | High-voltage switch and fracture structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021129369A1 (en) | 2021-07-01 |
| CN113035632A (en) | 2021-06-25 |
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