阅读说明：本技术 一种断路器快速操作机构及方法 (Quick operating mechanism and method for circuit breaker ) 是由 汪浩 曹鹏飞 师慧倩 沈文 孔凡良 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种断路器快速操作机构,主要由操作机构、辅助开关、分励脱扣器、闭合电磁铁、分闸组件、储能电容、续流二极管和充电电阻等组成；还公开了其操作方法,二次回路通电时,若断路器执行分闸操作指令,斥力机构和分闸弹簧共同为断路器提供分闸力,若断路器执行合闸操作指令,斥力机构产生的斥力消失,斥力机构不影响操作机构合闸操作,二次回路断电时仅由分闸弹簧为断路器提供分闸力。本发明在不影响断路器合闸操作的同时降低了分闸动作的固有时间,实现断路器快速分断功能,结构简单,易于实现。(The invention discloses a quick operating mechanism of a circuit breaker, which mainly comprises an operating mechanism, an auxiliary switch, a shunt release, a closing electromagnet, a separating brake assembly, an energy storage capacitor, a freewheeling diode, a charging resistor and the like; when the secondary circuit is powered on, if the breaker executes a switching-off operation instruction, the repulsion mechanism and the switching-off spring provide switching-off force for the breaker together, if the breaker executes a switching-on operation instruction, the repulsion generated by the repulsion mechanism disappears, the repulsion mechanism does not influence the switching-on operation of the operation mechanism, and when the secondary circuit is powered off, the switching-off force is provided for the breaker only by the switching-off spring. The invention reduces the inherent time of the opening action while not influencing the closing operation of the circuit breaker, realizes the quick breaking function of the circuit breaker, and has simple structure and easy realization.)

1. The utility model provides a quick operating device of circuit breaker which characterized in that: the circuit breaker comprises an operating mechanism (1), an auxiliary switch (2) and a switching-off assembly (5), wherein the operating mechanism (1) comprises a rack, a main shaft (104), a first connecting shaft (102) and a second connecting shaft (105) which are respectively arranged on the rack, a tripping half shaft (106) for realizing tripping and driving the auxiliary switch (2) to rotate and a switching-on half shaft (107) for realizing switching-on are further arranged on the rack, a connecting sheet (103) for connecting a moving contact of a circuit breaker is mounted on the first connecting shaft (102), the auxiliary switch (2) and the switching-off assembly (5) are arranged on the rack, the switching-off assembly (5) comprises a repulsion mechanism, a switching-off spring (502), and a first hook (501) and a second hook (506) which respectively rotate around the second connecting shaft (105) and the first connecting shaft (102), the free end of the first hook (501) is arranged on the rack, and the repulsion mechanism comprises a supporting seat (505), Repulsion dish (503) and repulsion coil (504), opening spring (502) both ends respectively with couple (501) and repulsion dish (503) fastening connection, repulsion dish (503) and the swing joint of couple two (506), couple two (506) are connected with connecting axle one (102), repulsion coil (504) both ends insert external power source after connecting in series charging resistance (8) and auxiliary switch (2) respectively, repulsion coil (504) both ends are parallelly connected to have freewheel diode (7), repulsion coil (504) and auxiliary switch (2) both ends are parallelly connected to have energy storage capacitor (6).

2. The quick operating mechanism of the circuit breaker according to claim 1, characterized in that a tripping half shaft (106) and a closing electromagnet (4) are arranged on the frame, wherein one end of the tripping half shaft (106) is located below the auxiliary switch (2), one end of the tripping half shaft is located below the tripping trip (3) and abuts against a movable iron core of the tripping trip (3), a closing half shaft (107) is located below the closing electromagnet (4) and abuts against a movable iron core of the closing electromagnet (4), and the movable iron cores of the tripping trip (3) and the closing electromagnet (4) respectively drive the tripping half shaft (106) and the closing half shaft (107) to rotate when acting.

3. A method of operating a fast operating mechanism of a circuit breaker according to claim 2, characterized by the steps of:

when a circuit breaker secondary circuit formed by the repulsion coil (504), the auxiliary switch (2) and the energy storage capacitor (6) is electrified, if the circuit breaker executes a switching-off operation instruction, the shunt release (3) acts and pushes against the tripping half shaft (106) to rotate through the movable iron core, the auxiliary switch (2) is switched into a closed state from an open state, the energy storage capacitor (6) discharges the repulsion coil (504), and the repulsion mechanism and the switching-off spring (502) jointly provide a switching-off force for the circuit breaker; if the circuit breaker executes a closing operation instruction, the closing electromagnet (4) pushes against a closing half shaft (107) to rotate through the movable iron core, the tripping half shaft (106) does not rotate, the auxiliary switch (2) is switched to an open state from a closed state, the energy storage capacitor (6) does not discharge electricity to the repulsion coil (504), the repulsion force generated by the repulsion mechanism disappears, and the closing operation can be realized by overcoming the spring force of the opening spring (502) and the contact pressure of the circuit breaker;

when the secondary circuit is powered off, the opening spring (502) provides opening force for the circuit breaker.

Technical Field

The invention relates to an operating mechanism for a circuit breaker, in particular to an operating mechanism which can be switched on and off and can realize quick breaking in an electric operating mode, and an operating method thereof.

Background

The circuit breaker is used as a protective electric appliance for protecting a circuit, and can automatically cut off the circuit when a short circuit occurs in the circuit, so that the safety of line equipment and personnel is protected.

Sometimes, a circuit breaker is needed to be capable of rapidly breaking a fault circuit, and reducing the inherent action time of the opening action of an operating mechanism for the circuit breaker is a way for achieving rapid fault breaking of the circuit breaker.

At present, in order to improve the opening speed of an operating mechanism, the rigidity of an opening spring is often improved. In order to ensure that the circuit breaker can normally close, the rigidity of the opening spring of the operating mechanism is improved, and the rigidity of the closing spring of the operating mechanism is also required to be improved, so that the stress of parts such as a connecting rod of the operating mechanism is increased, the service life of each part is shortened, and the service life of the operating mechanism is further shortened.

Disclosure of Invention

One of the objectives of the present invention is to provide a fast operating mechanism for a circuit breaker, which can improve the opening force of the circuit breaker, reduce the inherent time of the opening operation, and does not affect the closing operation of the circuit breaker.

The technical scheme adopted by the invention for solving the technical problems is as follows: a quick operating mechanism of a circuit breaker comprises an operating mechanism, an auxiliary switch and a switching-off assembly, wherein the operating mechanism comprises a rack, a main shaft, a first connecting shaft, a second connecting shaft, a tripping half shaft and a switching-on half shaft, the main shaft, the first connecting shaft, the second connecting shaft, the tripping half shaft and the switching-on half shaft are arranged on the rack, the tripping half shaft is used for realizing tripping of the operating mechanism and driving the auxiliary switch to rotate, the switching-on half shaft is used for realizing switching-on of the operating mechanism, a connecting sheet used for connecting a moving contact of the circuit breaker is arranged on the first connecting shaft, the auxiliary switch and the switching-off assembly are arranged on the rack, the switching-off assembly consists of a repulsion mechanism, a switching-off spring and a first hook and a second hook which respectively rotate around the second connecting shaft and the first connecting shaft, the repulsion mechanism comprises a supporting seat, a repulsion coil and a repulsion coil which are arranged on the rack, the switching-off spring is a tension spring, and two ends are respectively fastened and connected with the first hook and the repulsion coil, the repulsion coil is subjected to a rightward spring force, the other end of the repulsion coil is movably connected with the free end of the second hook, the other end of the second hook is connected with the first connecting shaft, the repulsion mechanism, the main shaft, the second hook and the connecting sheet form a crank block mechanism, the repulsion coil can drive the connecting sheet to rotate around the main shaft and further drive a breaker moving contact connected with the connecting sheet to rotate, two ends of the repulsion coil are respectively connected with a charging resistor and an auxiliary switch in series and then are connected with an external power supply, two ends of the repulsion coil are connected with a freewheeling diode in parallel, two ends of the repulsion coil and two ends of the auxiliary switch are connected with an energy storage capacitor in parallel, and the repulsion coil, the auxiliary switch and the energy storage capacitor form a breaker secondary circuit.

In the quick operating mechanism of the circuit breaker, a shunt release and a closing electromagnet are also arranged on a rack of the quick operating mechanism; one end of the tripping half shaft is positioned below the auxiliary switch, the other end of the tripping half shaft is positioned below the shunt release and the closing electromagnet and is abutted against the shunt release and the movable iron core of the closing electromagnet, the tripping half shaft rotates when the movable iron core of the shunt release acts, at the moment, the operating mechanism can realize the tripping operation of the circuit breaker by the tripping spring and the repulsion mechanism, and the state of the auxiliary switch is converted from the open state to the closed state; the closing half shaft is located the below of closed electro-magnet and supports with the iron core that moves of closed electro-magnet and lean on, and closing half shaft rotates when the iron core that moves of closed electro-magnet, but the dropout semi-shaft does not rotate, and operating device can realize closing operation by closing spring this moment.

Another object of the present invention is to provide an operating method of the circuit breaker operating mechanism, so as to reduce the intrinsic time of the opening operation of the circuit breaker operating mechanism, including the following steps: when a secondary circuit of the circuit breaker, which consists of the repulsion coil, the auxiliary switch and the energy storage capacitor, is electrified, if the circuit breaker executes a switching-off operation instruction, the shunt release acts and pushes against a tripping half shaft to rotate through the movable iron core, at the moment, the operation mechanism can execute switching-off operation, the auxiliary switch is switched to a closed state from a disconnected state, the energy storage capacitor discharges electricity to the repulsion coil, and the repulsion mechanism and the switching-off spring jointly provide switching-off force for the circuit breaker; if the circuit breaker executes a closing operation instruction, the closing electromagnet acts and pushes against a closing half shaft through the movable iron core, the closing half shaft rotates, the tripping half shaft does not rotate, at the moment, the operating mechanism can realize closing operation, the tripping half shaft does not rotate, the auxiliary switch is switched from a closed state to an open state, the energy storage capacitor does not discharge electricity to the repulsion coil, the repulsion force generated by the repulsion mechanism disappears, and at the moment, the operating mechanism and a common operating mechanism are the same, and the closing spring of the operating mechanism can realize closing operation only by overcoming the spring force of the opening spring and the contact pressure of the circuit breaker; when a secondary circuit of the circuit breaker formed by the repulsion coil, the auxiliary switch and the energy storage capacitor is powered off, the opening spring provides opening force for the circuit breaker.

The invention has the beneficial effects that: the invention can improve the brake opening force of the operating mechanism without improving the rigidity of the closing spring of the operating mechanism, reduce the inherent time of the brake opening action of the operating mechanism and realize the requirement of the quick brake opening function of the operating mechanism.

Drawings

FIG. 1 is a block diagram of the closing state of the operating mechanism of the present invention;

FIG. 2 is a structural diagram of the operating mechanism of the present invention in an open state;

fig. 3 is an electrical connection diagram of the repulsive force mechanism of the present invention.

The figures are numbered: the device comprises an operating mechanism 1, an operating mechanism 101, a closing spring 102, a connecting shaft I, a connecting sheet 103, a main shaft 104, a connecting shaft II, a tripping half shaft 106, a closing half shaft 107, an auxiliary switch 2, a shunt release 3, a closing electromagnet 4, a separating brake assembly 5, a hook I501, a separating brake spring 502, a repulsive force plate 503, a repulsive force coil 504, a supporting seat 505, a hook II 506, an energy storage capacitor 6, a freewheeling diode 7 and a charging resistor 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Illustrations of the described embodiments are shown in the drawings, and like reference numerals indicate like or similar elements or elements with like or similar functionality. The following described embodiments are exemplary, are intended to be illustrative of the invention, and are not to be construed as limiting the invention.

Referring to fig. 1 and 2, the quick operating mechanism of a circuit breaker disclosed by the invention mainly comprises an operating mechanism 1, an auxiliary switch 2, a shunt release 3, a closing electromagnet 4, a switching-off assembly 5, an energy storage capacitor 6, a freewheeling diode 7, a charging resistor 8 and the like.

The operating mechanism 1 comprises an operating mechanism frame, a main shaft 104, a first connecting shaft 102, a second connecting shaft 105, a tripping half shaft 106 and a connecting sheet 103, wherein the main shaft 104, the first connecting shaft 102, the second connecting shaft 105 and the tripping half shaft 106 are arranged on the operating mechanism frame, the connecting sheet 103 is used for connecting a moving contact of a circuit breaker, one side of the connecting sheet 103 is fixedly connected with the first connecting shaft 102, and the other side of the connecting sheet is fixedly connected with the main shaft 104.

The auxiliary switch 2 is arranged on the rack, and the state conversion of the auxiliary switch 2 is realized through the rotation of the tripping half shaft 106. The opening component 5 is an important component for realizing rapid operation, when the secondary circuit of the circuit breaker is electrified, the opening component 5 can improve the opening force of the circuit breaker, reduce the inherent time of opening action of the operating mechanism 1, and further realize the function of rapidly cutting off the circuit of the circuit breaker.

The opening assembly 5 mainly comprises an opening spring 502 for opening the breaker and a repulsion mechanism (comprising a repulsion plate 503, a repulsion coil 504 and a support seat 505), the opening spring 502, a first hook 501 and a second hook 506, wherein the repulsion mechanism is used for improving the opening force of the breaker when a secondary circuit of the breaker is electrified, the opening spring 502 is a tension spring, one end of the opening spring is fixed on the first hook 501, the other end of the opening spring is fixed on the repulsion plate 503, the repulsion plate 503 is subjected to rightward spring force (in the direction shown in the figure), and the support seat 505 is arranged on the rack, namely, the repulsion plate 503 can only move leftwards and rightwards (in the direction shown in the figure); one end of the first hook 501 can rotate around the second connecting shaft 105, the second connecting shaft 105 is fixed on a frame of an operating mechanism, one end of the second hook 506 is fixed on the first connecting shaft 102 and can rotate around the first connecting shaft, the other end of the second hook 506 is fixedly connected with one end of the repulsive force plate 503 through a hinge, the repulsive force mechanism, the main shaft 104, the second hook 506 and the connecting plate 103 form a crank-slider mechanism, the connecting plate 103 can be driven to rotate around the main shaft 104 when the repulsive force plate 503 moves, and then the moving contact of the circuit breaker connected with the connecting plate 103 is driven to rotate, so that the circuit breaker circuit breaking instruction is further completed, and the function of quickly breaking the circuit of the circuit breaker can be realized by improving the opening force applied to the repulsive force plate 503.

The repulsion coil 504, the energy storage capacitor 6 and the auxiliary switch 2 are electrically connected in series, the energy storage capacitor 6 is connected with the charging resistor 8 in series and then connected with an external power supply, the repulsion coil 504 is externally connected with a freewheeling diode 7 in parallel, and the repulsion coil 504, the energy storage capacitor 6 and the auxiliary switch 2 form a secondary circuit of the circuit breaker. When the auxiliary switch 2 is in a closed state, the repulsion coil 504 is connected with the energy storage capacitor 6; when the auxiliary switch 2 is turned off by the rotation of the trip half shaft 106, the repulsive coil 504 is disconnected from the energy storage capacitor 6.

The operation method of the circuit breaker operating mechanism of the invention comprises the following steps.

When the secondary circuit of the circuit breaker is electrified, the energy stored in the energy storage capacitor 6 is converted into the kinetic energy of the repulsion mechanism, the force borne by the repulsion plate 503 is the sum of the spring force (provided by the opening spring 502) and the repulsion force (provided by the repulsion mechanism), the opening force is improved, the inherent time of opening operation action of the operation mechanism is reduced, and the function of quickly cutting off the circuit of the circuit breaker is realized; the opening force of the breaker is provided by the opening spring 502 and the repulsion mechanism together, so that the opening speed of the breaker is improved, and the function of quickly cutting off the circuit of the breaker is realized.

At this time, if the circuit breaker executes a switching-off operation instruction, the shunt release 3 acts, a movable iron core of the shunt release 3 pushes against the tripping half shaft 106 to rotate, at this time, the operating mechanism 1 can execute a switching-off operation, at this time, the auxiliary switch 2 is switched from an off state to an on state, the repulsion coil 504 is further switched on with the energy storage capacitor 6, the energy storage capacitor 6 discharges electricity to the repulsion coil 504, the repulsion plate 503 receives repulsion force exerted by the repulsion coil 504 and has a direction towards the right (in the direction shown in the figure), the repulsion force has the same direction as the spring force of the switching-off spring 502, extra switching-off force is provided for the circuit breaker switching-off, the switching-off force of the operating mechanism is improved by the switching-off force (the sum of the spring force and the repulsion force) simultaneously provided by the switching-off spring 502 and the repulsion mechanism, and therefore, the movement time of the circuit breaker is shortened, and the circuit breaker realizes the function of quickly switching-off the circuit.

At this time, if the circuit breaker executes a closing operation instruction, the closing electromagnet 4 acts and pushes against the closing half shaft 107 through the movable iron core, the closing half shaft 107 rotates, the tripping half shaft 106 does not rotate, at this time, the operating mechanism 1 can realize closing operation, because the tripping half shaft 106 does not rotate, the auxiliary switch 2 is switched from a closed state to an open state, the energy storage capacitor 6 does not discharge to the repulsion coil 504 any more, the repulsion generated by the repulsion mechanism disappears, at this time, the operating mechanism and a common operating mechanism are the same, and the closing spring 101 of the operating mechanism can realize closing operation only by overcoming the spring force of the opening spring 502 and the contact pressure of the circuit breaker, so that the closing operation of the circuit breaker is realized.

The opening assembly 5 does not influence the closing operation of the operating mechanism 1, so that the method for reducing the inherent time of the opening action of the circuit breaker operating mechanism can realize the quick breaking operation of the circuit breaker without improving the rigidity of the closing spring 101, and the service life of the circuit breaker operating mechanism is not influenced.

When the circuit breaker secondary circuit is powered off, the repulsive force plate 503 only receives a spring force, and manual opening operation can be realized through the spring force: the opening force of the breaker is provided by the opening spring 502, and manual opening operation can be realized, and the operating mechanism can realize manual opening and closing operation through the closing spring 101 and the opening spring 502.

The invention reduces the inherent time of the opening action while not influencing the closing operation of the circuit breaker, realizes the quick breaking function of the circuit breaker, and has simple structure and easy realization.

The shapes and positions illustrated in the present description are exemplary, and the modification of the shapes of some parts or the positions of the rotating shafts can also achieve the purpose of reducing the inherent time of the opening action of the operating mechanism, which should not be construed as limiting the present invention.