Contact arc extinguishing device of high-voltage electrical circuit breaker

Abstract

The utility model discloses a high-voltage electrical circuit breaker contact arc extinguishing device, which comprises a ceramic shell, an inner cavity is arranged in the middle of the ceramic shell, a static conductive block is arranged at the upper end of the ceramic shell, a movable conductive block is arranged at the lower end of the ceramic shell, and a static conductive rod is arranged on the static conductive block towards the direction of the inner cavity. The movable conductive block is provided with a movable conductive rod facing the inner cavity, the movable conductive rod can be in contact with the static conductive rod, one end, in contact with the movable conductive rod, of the static conductive rod is provided with an arc extinguishing assembly, the inner cavity is provided with a conductive layer corresponding to the arc extinguishing assembly, and the arc extinguishing assembly is in contact with the conductive layer and is in sliding connection with the conductive layer. The arc extinguishing device can timely and effectively extinguish electric arcs, can guide the electric arcs which are not completely extinguished into the ground, and is high in safety performance and simple in structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to arc extinguishing device technical field, specifically is a circuit breaker contact arc extinguishing device for high voltage electrical. BACKGROUND

[0002] In the circuit breaker, the contact will produce arc when breaking and closing the circuit, the production of arc not only can burn the contact, cause the poor contact of circuit, still can cause fire, cause the circuit paralysis, therefore, the installation of arc extinguishing device is important for guaranteeing the safe operation of high voltage electrical equipment, although the common circuit breaker contact arc extinguisher for high voltage electrical on the market can avoid the harm of arc to the outside world to some extent, but can not completely prevent the production of arc, and the arc extinguishing effect is not good, the existing circuit breaker contact arc extinguisher for high voltage electrical generally adopts gas blowout arc extinguishing, and the gas blowout arc extinguishing device can be divided into two categories of horizontal blowout and vertical blowout, wherein the vertical blowout arc extinguishing device is widely used in high voltage electrical equipment due to its simple structure and strong arc extinguishing capacity, but the gas blowout arc extinguishing has requirements for the space of arc extinguishing device, and needs enough momentum to blow the arc away from the gap of the contact, which has high requirements for gas dynamics and structure design, and is inconvenient to manufacture, if the momentum is insufficient, the arc can not be completely extinguished, the structure is complex, and the arc extinguishing stability is not good. SUMMARY

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a circuit breaker contact arc extinguishing device for high voltage electrical to solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: including ceramic shell, the inner chamber is set up in the ceramic shell middle part, the ceramic shell upper end is provided with static conductive block, and the lower end is provided with dynamic conductive block, the static conductive block is provided with static conductive rod towards the inner chamber direction, the dynamic conductive block is provided with dynamic conductive rod towards the inner chamber direction, the dynamic conductive rod can contact with static conductive rod, one end of static conductive rod and dynamic conductive rod is provided with arc extinguishing assembly, the inner chamber is provided with conductive layer corresponding arc extinguishing assembly position, the arc extinguishing assembly is in contact with the conductive layer and is slidably connected with the conductive layer, and the conductive layer is in ground connection.

[0005] The effect that can be produced by the above technical scheme is: in the present scheme, the arc extinguishing assembly is arranged between the dynamic conductive rod and the static conductive rod, when the dynamic conductive rod and the static conductive rod are separated, the arc can be extinguished by the arc extinguishing assembly in time, if the arc can not be completely extinguished by the arc extinguishing assembly, the conductive layer is arranged to ground, so that the arc that is not completely extinguished by the arc extinguishing assembly can be guided to the ground through the conductive layer for arc extinguishing, which is safer, more convenient to operate, has better arc extinguishing stability and simple structure.

[0006] As a further improvement of the utility model, the electrically conductive layer is provided with a plurality of electrically conductive contacts on the inner side wall of the arc extinguishing assembly, and the outer side wall is provided with a grounding wire connected to the ground.

[0007] The above technical scheme can produce the effect that the electrically conductive contacts connected to the ground can guide the electric arc that has not been completely extinguished to the ground through the electrically conductive contacts, thereby avoiding the high temperature from burning out the circuit breaker.

[0008] As a further improvement of the utility model, the arc extinguishing assembly comprises a plurality of first fins uniformly arranged on the static electrically conductive rod and a plurality of second fins uniformly arranged on the dynamic electrically conductive rod, one end of the first fin is fixedly connected to the static electrically conductive rod, the other end extends towards the inner wall of the electrically conductive layer and is in contact with the inner wall, one end of the second fin is fixedly connected to the dynamic electrically conductive rod, the other end extends towards the inner wall of the electrically conductive layer and is in contact with the inner wall, and an arc extinguishing gap is formed between the first fin and the second fin.

[0009] The above technical scheme can produce the effect that the plurality of first fins and second fins are arranged, one first fin corresponds to one second fin, the arc extinguishing gap between the first fin and the second fin can effectively extinguish the electric arc generated between the dynamic electrically conductive rod and the static electrically conductive rod, the plurality of first fins and second fins can cut the electric arc into a plurality of small electric arcs, which can more effectively extinguish the arc and improve the arc extinguishing efficiency, can avoid the safety hazard caused by the incomplete extinguishing of the electric arc, and can improve the arc extinguishing efficiency and increase the safety performance.

[0010] As a further improvement of the utility model, the first fin is upwardly inclined to the static electrically conductive rod.

[0011] The above technical scheme can produce the effect that the upward inclination of the first fin to the static electrically conductive rod can increase the distance between the first fin and the second fin, thereby improving the arc extinguishing effect in a narrow moving space.

[0012] As a further improvement of the utility model, the second fin is downwardly inclined to the dynamic electrically conductive rod.

[0013] The above technical scheme can produce the effect that the downward inclination of the second fin to the dynamic electrically conductive rod can increase the distance between the first fin and the second fin, and since the internal space of the arc extinguishing device is small, appropriately increasing the distance between the first fin and the second fin can improve the arc extinguishing effect.

[0014] As a further improvement of the utility model, the dynamic electrically conductive rod is provided with a pressing plate, the outer peripheral wall of the pressing plate is slidably connected to the inner peripheral wall of the inner cavity, a gas chamber for accommodating sulfur hexafluoride gas is formed between the pressing plate and the bottom surface of the dynamic electrically conductive rod, and a heater for heating the sulfur hexafluoride is arranged in the gas chamber.

[0015] The above technical scheme can produce the effects that: the pressing plate is arranged to press out the sulfur hexafluoride gas in the gas chamber, and the pressing is convenient; the sulfur hexafluoride in the gas chamber can be placed by the person skilled in the art when installing the arc extinguishing device; the heater arranged in the gas chamber can avoid the sulfur hexafluoride from being converted into liquid, can ensure that the sulfur hexafluoride is in a gaseous state, and is easy to be pressed out by the pressing plate for arc extinguishing, so that the arc extinguishing effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the utility model embodiment;

[0017] Figure 2 It is a local sectional structure enlarged view of the utility model;

[0018] Figure 3 It is a front view of the utility model. DETAILED DESCRIPTION

[0019] The utility model discloses a circuit breaker contact arc extinguishing device for high voltage electrical, including ceramic shell 1, the ceramic shell 1 middle part is provided with inner chamber 2, the ceramic shell 1 upper end is provided with static conductive block 3, and the lower end is provided with dynamic conductive block 4, static conductive block 3 is provided with static conductive rod 5 towards inner chamber 2 direction, dynamic conductive block 4 is provided with dynamic conductive rod 6 towards inner chamber 2 direction, dynamic conductive rod 6 can contact with static conductive rod 5, one end of static conductive rod 5 and dynamic conductive rod 6 contact is provided with arc extinguishing subassembly, inner chamber 2 corresponds arc extinguishing subassembly position and is provided with conducting layer 7, arc extinguishing subassembly and conducting layer 7 contact and with conducting layer 7 sliding connection, conducting layer 7 is ground setting, this scheme adopts and sets up by arc extinguishing subassembly between dynamic conductive rod 6 and static conductive rod 5, when dynamic conductive rod 6 and static conductive rod 5 separate arc can be extinguished in time by arc extinguishing subassembly, if arc can not be extinguished completely by arc extinguishing subassembly, this scheme still adopts and sets up conducting layer 7 ground setting makes the arc that is not extinguished completely by arc extinguishing subassembly can guide arc to the ground through conducting layer 7 and carry out arc extinguishing, is more safe, operation is more convenient, arc extinguishing stability is better, conducting layer 7 is provided with a plurality of conductive contacts 8 towards the inner side wall of arc extinguishing subassembly, and its outer side wall is provided with ground wire 9 connected with ground, adopts and sets up a plurality of earthing conductive contacts 8 can make the arc that is not extinguished completely can guide arc to the ground through conductive contact 8, avoid producing high temperature and burning out circuit breaker, arc extinguishing subassembly includes a plurality of first louvre 10 evenly arranged on static conductive rod 5 and second louvre 11 evenly arranged on dynamic conductive rod 6, one end of first louvre 10 is fixedly connected with static conductive rod 5, and the other end extends towards the inner wall of conducting layer 7 and contacts with it, one end of second louvre 11 is fixedly connected with dynamic conductive rod 6, and the other end extends towards the inner wall of conducting layer 7 and contacts with it, arc gap 12 is formed between first louvre 10 and second louvre 11, adopts and sets up a plurality of first louvre 10 and second louvre 11, and one first louvre 10 corresponds one second louvre 11 setting, and arc gap 12 between first louvre 10 and second louvre 11 can effectively extinguish the arc between dynamic conductive rod 6 and static conductive rod 5, and a plurality of first louvre 10 and second louvre 11 combination can cut arc into a plurality of small arcs, can be more helpful to arc extinguishing, improve arc extinguishing efficiency, also can avoid the hidden danger of arc not extinguishing completely, improve arc extinguishing efficiency, also can increase safety performance, first louvre 10 and static conductive rod 5 are provided with inclination upwards, and first louvre 10 and static conductive rod 5 are provided with inclination upwards, can make the distance between first louvre 10 and second louvre 11 larger, can improve arc extinguishing effect in narrow moving space.The second grid sheet 11 is arranged downwardly inclined to the moving conducting rod 6, and the distance between the first grid sheet 10 and the second grid sheet 11 is enlarged by arranging the second grid sheet 11 downwardly inclined, so that the arc extinguishing effect is improved by appropriately enlarging the distance between the first grid sheet 10 and the second grid sheet 11 due to the small space in the arc extinguishing device; the moving conducting rod 6 is provided with a pressing plate 13, the outer peripheral wall of the pressing plate 13 is slidably connected with the inner peripheral wall of the inner cavity 2, a gas chamber 14 for accommodating sulfur hexafluoride gas is formed between the pressing plate 13 and the bottom surface of the moving conducting rod 6, and a heater 15 for heating the sulfur hexafluoride is arranged in the gas chamber 14, the sulfur hexafluoride in the gas chamber 14 is pressed out by the pressing plate 13, and the sulfur hexafluoride in the gas chamber 14 can be placed by the person skilled in the art during installation of the arc extinguishing device, the heater 15 arranged in the gas chamber 14 can avoid the sulfur hexafluoride from being converted into liquid, and can ensure that the sulfur hexafluoride is in a gaseous state, so that the arc extinguishing effect is good, the arc is easily extinguished by being pressed out by the pressing plate 13, and the arc is extinguished more stably, and the structure is simple and convenient to operate.

[0020] The preferred embodiments of the utility model are described above, and the protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the utility model belongs to the protection scope of the utility model. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model are also considered as the protection scope of the utility model.

Claims

1. A high-voltage electrical circuit breaker contact arc extinguishing device, comprising a ceramic housing, an inner cavity is formed in the middle of the ceramic housing, a static conductive block is arranged at the upper end of the ceramic housing, and a dynamic conductive block is arranged at the lower end of the ceramic housing, a static conductive rod is arranged on the static conductive block in the direction of the inner cavity, a dynamic conductive rod is arranged on the dynamic conductive block in the direction of the inner cavity, and the dynamic conductive rod can contact the static conductive rod, characterized in that, The end of the static conductive rod in contact with the dynamic conductive rod is provided with an arc extinguishing assembly, the inner cavity is provided with a conductive layer corresponding to the position of the arc extinguishing assembly, the arc extinguishing assembly is in contact with and in sliding connection with the conductive layer, and the conductive layer is in ground connection.

2. The circuit breaker contact arc extinguishing device for high voltage electric use according to claim 1, characterized by, The inner side wall of the conductive layer towards the arc extinguishing assembly is provided with a plurality of conductive contacts, and the outer side wall is provided with a ground wire connected with the ground.

3. The circuit breaker contact arc chute device for high voltage electrical use according to claim 1, characterized in that, The arc extinguishing assembly comprises a plurality of first fins uniformly arranged on the static conductive rod and a plurality of second fins uniformly arranged on the dynamic conductive rod, one end of the first fin is fixedly connected with the static conductive rod, the other end extends towards the inner wall of the conductive layer and is in contact with the inner wall, one end of the second fin is fixedly connected with the dynamic conductive rod, the other end extends towards the inner wall of the conductive layer and is in contact with the inner wall, and an arc extinguishing gap is formed between the first fin and the second fin.

4. The circuit breaker contact arc chute device for high voltage electrical use according to claim 3, characterized by, The first fin is upwardly inclined with respect to the static conductive rod.

5. The circuit breaker contact arc chute device for high voltage electrical use according to claim 3, wherein, The second fin is downwardly inclined with respect to the dynamic conductive rod.

6. The circuit breaker contact arc chute device for high voltage electrical use according to claim 1, characterized by, The dynamic conductive rod is provided with a pressing plate, the outer peripheral wall of the pressing plate is in sliding connection with the inner peripheral wall of the inner cavity, a gas chamber for accommodating sulfur hexafluoride gas is formed between the pressing plate and the bottom surface of the dynamic conductive rod, and a heater for heating sulfur hexafluoride is arranged in the gas chamber.

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