CN220963100U - Contact assembly, low-voltage switch and power distribution equipment - Google Patents

Abstract

The application provides a contact assembly, a low-voltage switch and power distribution equipment, and relates to the technical field of low-voltage switch appliances. According to the application, the arc extinguishing chamber is arranged on the moving path of the moving contact group and is used for extinguishing the electric arc generated when the moving contact group is separated from the fixed contact group, and the arc extinguishing chamber is provided with the arc striking piece extending towards the fixed contact group, so that redundant parts do not need to be arranged on the arc striking piece, the arc striking piece is convenient to process and mount, and the arc striking piece is contacted with the fixed contact group, thus the electric potentials of the arc striking piece and the fixed contact group are equal, the electric arc generated when the moving contact group is separated from the fixed contact group can be transferred between the moving contact group and the arc striking piece, and then the electric arc is quickly transferred to the arc extinguishing chamber, thereby reducing the ablation of the electric arc on the fixed contact group, and improving the speed of transferring the electric arc to the arc extinguishing chamber.

Description

Contact assembly, low-voltage switch and power distribution equipment

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a contact assembly, a low-voltage switch and power distribution equipment.

Background

The low-voltage switch is an electric appliance capable of playing a role in electrifying and cutting off power in a circuit, wherein a circuit breaker and a dual-power transfer switch are two common low-voltage switches. The circuit breaker is used for protecting various devices in the power system from being damaged by overload and short circuit, and is widely applied to the power system, industrial production and household activities; the double-power transfer switch is used for switching two paths of power supplies, and is quickly switched to a standby power supply when a common power supply fails in the power supply process, so that normal power supply of a load end is ensured, and the double-power transfer switch is commonly used for important power distribution occasions (such as a hospital power supply system).

In the course of conception and implementation of the present application, the inventors found that at least the following problems exist: the contact assembly is used as an actuating mechanism of the low-voltage switch, plays an important role in switching on and off a circuit, and is one of the most important components of the low-voltage switch. The contact assembly generally comprises a fixed contact group and a moving contact group which moves relative to the fixed contact group, wherein an arc can be generated at the moment when the moving contact group and the fixed contact group are separated, the arc generated when the moving contact group and the fixed contact group are separated can be quickly led to the arc extinguishing chamber by arranging an arc striking angle on the fixed contact group, but the arc extinguishing chamber and the arc striking angle are easily ablated by the arc striking angle due to a certain interval, so that the low-voltage switch is damaged, and further, the electrical device is subjected to larger fault.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of utility model

The application aims to solve the technical problems, and provides a contact assembly, a low-voltage switch and power distribution equipment, which are structurally characterized in that an arc extinguishing chamber is arranged on a moving path of a moving contact group and is used for extinguishing an arc generated when the moving contact group is separated from a fixed contact group, and the arc extinguishing chamber is provided with an arc striking piece extending towards the fixed contact group, so that redundant installation parts are not required to be arranged on the arc striking piece, the arc striking piece is convenient to process and install, and the arc striking piece is contacted with the fixed contact group, therefore, the potential of the arc striking piece is equal to that of the fixed contact group, the arc generated when the moving contact group is separated from the fixed contact group can be transferred between the moving contact group and the arc striking piece, and then the arc is quickly transferred to the arc extinguishing chamber, thereby reducing the ablation degree of the arc to the fixed contact group, and improving the speed of transferring the arc to the arc extinguishing chamber.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:

The embodiment of the application provides a contact assembly, which comprises a fixed contact group and a moving contact group which are matched with each other in a closing and opening way, wherein an arc extinguishing chamber is arranged on a moving path of the moving contact group, the arc extinguishing chamber is provided with an arc striking piece extending towards the fixed contact group, and the arc striking piece is contacted with the fixed contact group.

Optionally, the explosion chamber includes relative and the first curb plate and the second curb plate that the interval set up, and the striking spare is located between first curb plate and the second curb plate and extends towards the stationary contact group, and striking spare and first curb plate and/or second curb plate grafting.

Optionally, the arc striking piece includes first arc striking portion and second arc striking portion, and first arc striking portion is pegged graft with first curb plate and/or second curb plate, and second arc striking portion is connected and is buckled relative first arc striking portion with first arc striking portion end, and the other end of second arc striking portion extends towards the stationary contact group and contacts with the stationary contact group.

Optionally, the bending positions of the first arc striking part and the second arc striking part are positioned at the opening of the arc extinguishing chamber.

Optionally, in the process of separating the movable contact group from the fixed contact group, the distance between the arc striking piece and the movable contact group is smaller than or equal to the distance between the fixed contact group and the movable contact group.

Optionally, the moving contact group rotates relative to the fixed contact group, the fixed contact group is provided with a bending part matched with the moving contact combination brake, the arc striking piece is contacted with the bending part, and the contact surface is positioned at the outer side of the moving contact group moving path.

Optionally, the number of the static contact groups is at least two, the moving contact group is used for being matched with the at least two static contact groups in a switching way, the plurality of static contact groups are distributed on two opposite sides of the moving contact group, the number of the arc extinguishing chambers is at least two, the at least two arc extinguishing chambers are respectively located on the moving paths of two ends of the moving contact group, and at least one arc striking piece is arranged on two sides of the arc extinguishing chambers.

Optionally, the arc extinguishing chamber is provided with an avoidance channel, and the avoidance channel is positioned on a movement path of the moving contact group.

The embodiment of the application also provides a low-voltage switch, which comprises a shell, a driving structure arranged in the shell and any contact assembly, wherein the driving structure is in driving connection with a moving contact group of the contact assembly.

The embodiment of the application also provides power distribution equipment, which is provided with a contact device, wherein the contact device comprises any one of the contact assemblies.

The beneficial effects of the application include:

The application provides a contact assembly, a low-voltage switch and power distribution equipment. According to the application, the arc extinguishing chamber is arranged on the moving path of the moving contact group and is used for extinguishing an electric arc generated when the moving contact group is separated from the fixed contact group, and the arc extinguishing chamber is provided with the arc striking piece extending towards the fixed contact group, so that redundant installation parts are not required to be arranged on the arc striking piece, the arc striking piece is convenient to process and install, and is contacted with the fixed contact group, thus, the electric potentials of the arc striking piece and the fixed contact group are equal, when the moving contact group is just separated from the fixed contact group, a strong electric field is generated between the moving contact group and the fixed contact group to break down, an electric arc is formed, and in the continuous breaking process of the moving contact group and the fixed contact group, the electric arc can be transferred between the moving contact group and the arc striking piece and then is quickly transferred to the arc extinguishing chamber, so that the ablation degree of the electric arc on the fixed contact group is reduced, and the speed of the electric arc transferred to the arc extinguishing chamber is improved.

The power distribution equipment is provided with the contact assembly and/or the low-voltage switch, and optionally, the low-voltage switch is a dual-power transfer switch, the contact assembly and/or the low-voltage switch are applied to the power distribution equipment, the power distribution equipment can be applied to various use scenes, and the power distribution equipment can be applied to intelligent home, the Internet of things industry and more intelligent scenes so as to realize intelligent management. Alternatively, the application may be used in the following usage scenarios: fire electricity consumption: the fire control system comprises a fire control room, a fire pump, a smoke prevention and exhaust facility, a fire elevator, a drainage pump, fire emergency lighting and the like; roadway lighting, duty lighting, guard lighting and obstacle marker lights; rail transit; a security system power supply; an electronic information machine room power supply; passenger elevator power; a sewage pump; variable-frequency speed-regulating constant-pressure water supply living pump (or else, a secondary load); the system comprises a main office, a conference room, a general office, an archive room.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a low-voltage switch according to an embodiment of the present application;

FIG. 2 is a second schematic diagram of a low voltage switch according to an embodiment of the present application;

fig. 3 is a schematic structural view of a contact assembly according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a second embodiment of a contact assembly;

Fig. 5 is a schematic structural diagram of an arc extinguishing chamber according to an embodiment of the present application;

fig. 6 is a second schematic structural diagram of an arc extinguishing chamber according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a first side plate or a second side plate according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an arc striking member according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a static contact group according to an embodiment of the present application;

Fig. 10 is a schematic connection diagram of an arc striking member and a fixed contact set according to an embodiment of the present application.

Icon: 10-contact assembly; 100-static contact groups; 100 a-a first common static contact group; 100 b-a first spare static contact group; 100 c-a second common static contact group; 110-body; 120-bending part; 120 a-a first bend; 120 b-a second bend; 121-a first connection section; 122-a second connection section; 200-moving contact groups; 300-arc extinguishing chamber; 300 a-a first arc chute; 300 b-a second arc chute; 310-arc striking piece; 311-a first arc striking part; 312-a second arc striking portion; 320-a first side plate; 321-a first jack; 330-a second side panel; 331-a second jack; 20-shell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. It should be noted that, under the condition of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and for simplification of description, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Driven by the intelligent and automatic high-new technology, the intelligent home industry enters a rapid development period. The smart home industry meets new challenges and opportunities in technological, marketing and industry revolution.

Divide intelligent house according to the function, can divide into eight modules with whole house intelligence: entertainment system, security protection system, control system, lighting system, kitchen and bathroom household electrical appliances system, network and communication system, health medical system, indoor environment system. And the eight modules are linked together, so that the whole house intelligence is finally realized.

In this digital age, people have also become increasingly dependent on electricity, and stable and reliable electricity supply is of paramount importance, whether in the home, industry or business. The circuit breaker and the dual power transfer switch are two low-voltage switches with wider application. The circuit breaker is used as a protection device in a power system, can be used for protecting various devices in the power system from being damaged by overload and short circuit, and is widely applied to the power system, industrial production and household activities; the double-power transfer switch can be automatically switched to another standby power supply under the condition that one power supply fails, so that uninterrupted power supply is realized, and normal operation of equipment is ensured, and therefore, the double-power transfer switch is commonly used for important power distribution occasions.

The contact assembly 10 is used as an actuating mechanism of the low-voltage switch, plays an important role in switching on and off a circuit, and is one of the most important components of the low-voltage switch. The contact assembly 10 generally comprises a fixed contact group 100 and a moving contact group 200 moving relative to the fixed contact group 100, wherein an arc is generated when the moving contact group 200 is separated from the fixed contact group 100, and the arc generated when the moving contact group 200 is separated from the fixed contact group 100 can be quickly led to the arc extinguishing chamber 300 by arranging an arc striking angle on the fixed contact group 100, but due to a certain interval between the arc extinguishing chamber 300 and the arc striking angle, the arc is easily ablated on the arc striking angle, the low-voltage switch is damaged, and the electrical device is further greatly failed.

Therefore, the embodiment of the present application provides a contact assembly 10, which may be applied to a low-voltage switch, specifically, as shown in fig. 1 and 2, the contact assembly 10 includes a fixed contact group 100 and a moving contact group 200 that are matched in a closing and opening manner, the fixed contact group 100 is generally and fixedly installed in a housing 20 of the low-voltage switch, the moving contact group 200 is movably installed in the housing 20 of the low-voltage switch, the closing and opening manner of the low-voltage switch is achieved by driving the moving contact group 200 to approach or separate from the fixed contact group 100, and an arc extinguishing chamber 300 is provided on a movement path of the moving contact group 200 for extinguishing an arc generated when the moving contact group 200 is separated from the fixed contact group 100. Of course, the movable mounting manner of the movable contact group 200 is not limited in the present application, and for example, it may be rotatably mounted on the housing 20 of the low voltage switch, or may be slidably mounted on the housing 20 of the low voltage switch. For ease of understanding, the following description will be made schematically taking the rotation of the movable contact group 200 as an example.

As shown in fig. 3 and fig. 4, the arc extinguishing chamber 300 has the arc striking member 310 extending towards the static contact group 100, so that no extra mounting part is required to be arranged on the arc striking member 310, the arc striking member 310 is convenient to process and mount the arc striking member 310, and the arc striking member 310 is in contact with the static contact group 100, therefore, the electric potential of the arc striking member 310 is equal to that of the static contact group 100, when the static contact group 100 is separated from the moving contact group 200, a strong electric field breakdown is generated between the moving contact group 200 and the static contact group 100 to form an electric arc, and in the continuous switching-off process of the moving contact group 200 and the static contact group 100, the electric arc can be transferred between the moving contact group 200 and the arc striking member 310, and then transferred to the arc extinguishing chamber 300 quickly, so that the ablation degree of the electric arc to the static contact group 100 is reduced, the speed of transferring the electric arc to the arc extinguishing chamber 300 is improved, and a low-voltage switch is not easy to damage, and the use process of an electrical device is safer.

It should be understood that the low-voltage switch may be a circuit breaker or a dual-power transfer switch, when the low-voltage switch is a circuit breaker, only the fixed contact group 100 is required to be arranged at one side of the moving contact group 200, so that one end of the moving contact group 200 is matched with the fixed contact group 100 to be opened, and at this time, only the arc extinguishing chamber 300 is required to be arranged on the moving path of the moving contact group 200, so that an arc generated when the moving contact group 200 is separated from the fixed contact group 100 in the opening process can be transferred to the arc extinguishing chamber 300 along with the movement of the moving contact group 200; when the low-voltage switch is a dual-power transfer switch, at least one fixed contact group 100 is respectively arranged on two opposite sides of the moving contact group 200, the fixed contact group 100 is respectively connected with a common power supply and a standby power supply, and the switching cooperation of the moving contact group 200 and the plurality of fixed contact groups 100 is realized, so that uninterrupted power supply of the power supply is ensured, and at least two arc-extinguishing chambers 300 are arranged on the moving path of the moving contact group 200, thereby ensuring that arcs generated when the moving contact group 200 is separated from any fixed contact group 100 in the switching-off process can be transferred to the arc-extinguishing chambers 300 along with the movement of the moving contact group 200, and further ensuring the safety of the distribution process.

It should be noted that, when the low-voltage switch is a circuit breaker, only the arc striking member 310 is required to be disposed at one side of the arc extinguishing chamber 300 facing the static contact group 100, so that an arc generated when the moving contact group 200 is separated from the static contact group 100 can be quickly transferred between the moving contact group 200 and the arc striking member 310, thereby avoiding ablation of the static contact group 100; when the low-voltage switch is a dual-power transfer switch, the arc striking members 310 are required to be disposed on both sides of the arc extinguishing chamber 300 facing the fixed contact group 100, so that the electric arc generated when the moving contact group 200 is separated from any fixed contact group 100 can be quickly transferred between the moving contact group 200 and the arc striking members 310, thereby avoiding ablation of the fixed contact group 100.

It should be understood that the arc extinguishing method of the arc extinguishing chamber 300 may be a grid arc extinguishing method, a magnetic blowing arc extinguishing method, or a narrow slit arc extinguishing method, but the present application is not limited thereto.

Alternatively, as shown in fig. 5 and 6, the arc extinguishing chamber 300 includes a first side plate 320 and a second side plate 330 opposite to each other and disposed at intervals, a first insertion hole 321 may be formed at an end of the first side plate 320, so that one end of the arc striking member 310 is inserted into the first insertion hole 321, the other end of the arc striking member is abutted against the second side plate 330, and similarly, a second insertion hole 331 may be formed at an end of the second side plate 330, so that one end of the arc striking member 310 is inserted into the second insertion hole 331, and the other end of the arc striking member is abutted against the first side plate 320, as shown in fig. 7, a first insertion hole 321 and a second insertion hole 331 may be formed at an end of the first side plate 320 and an end of the second side plate 330, so that one end of the arc striking member 310 is inserted into the first insertion hole 321, and the other end of the arc striking member 310 is inserted into the second insertion hole 331, thereby realizing connection between the arc extinguishing chamber 300, and the connection method is convenient for processing and mounting, and the working efficiency may be effectively improved. The arc striking member 310 is perpendicular to the plugging direction thereof, and one end of the arc striking member close to the moving contact group 200 should extend toward the fixed contact group 100 and contact the fixed contact group 100, thereby enabling an arc generated when the moving contact group 200 is separated from the fixed contact group 100 to be rapidly transferred between the moving contact group 200 and the arc striking member 310.

Optionally, as shown in fig. 3 to 8, the striking member 310 includes a first striking portion 311 and a second striking portion 312, one end of the first striking portion 311 may be inserted into the first jack 321, the other end of the first striking portion is abutted against the second side plate 330, one end of the first striking portion 311 may be inserted into the second jack 331, the other end of the second striking portion 311 may be abutted against the first side plate 320, one end of the first striking portion 311 may be inserted into the first jack 321, the other end of the second striking portion is inserted into the second jack 331, the first striking portion 311 is perpendicular to the insertion direction thereof and one end close to the moving contact group 200 is connected with the second striking portion 312, and the second striking portion 312 is bent relative to the first striking portion 311, the bending direction faces the moving contact group 100, that is, one end of the second striking portion 312 faces away from the first striking portion 311 extends towards the moving contact group 100, and one end of the second striking portion 311 faces away from the first striking portion 311 contacts the moving contact group 100, so that the moving contact group 100, and the moving contact group 200 can be separated from the moving contact group 100, when the first striking portion 311 and the moving contact group 200 are equal.

Alternatively, as shown in fig. 8, the arc striking member 310 formed by the first arc striking portion 311 and the second arc striking portion 312 may have an L-like structure, and the second arc striking portion 312 may be connected to a central position of one end of the first arc striking portion 311, where the arc striking member 310 is in an axisymmetric structure along a direction toward the static contact set 100.

Optionally, when the moving contact group 200 and the fixed contact group 100 are just separated, a strong electric field is generated between the contacts to form an arc, in the continuous brake separating process of the moving contact group 200, the distance between the moving contact group 200 and the bent position is smaller than or equal to the distance between the moving contact group 200 and the fixed contact group 100, the arc between the moving contact group 200 and the fixed contact group 100 is transferred between the moving contact group 200 and the second arc striking part 312, one end of the arc is positioned in the moving contact group 200, one end of the arc is positioned in the second arc striking part 312, the bent position of the first arc striking part 311 and the second arc striking part 312 is arranged at the opening of the arc extinguishing chamber 300, so that the arc can quickly enter the arc extinguishing chamber 300 after the movement of one end of the arc positioned in the second arc striking part 312 along with the moving contact group 200 is transferred to the bent position, and quick arc extinguishing is realized.

Alternatively, as shown in fig. 3 and 4, the moving contact group 200 rotates relative to the fixed contact group 100, and the fixed contact group 100 has a bending portion 120 that cooperates with the moving contact group 200 to close and open, that is, when closing is required, the moving contact group 200 is controlled to rotate in a direction approaching the fixed contact group 100 (that is, a closing direction), and the moving contact group 200 is fully contacted with the bending portion 120, so that closing is achieved. When the brake is required to be separated, the moving contact set 200 is controlled to rotate in a direction away from the fixed contact set 100 (i.e. the brake separating direction), so that the moving contact set 200 is separated from the bending portion 120, and brake separation is realized. The arc striking piece 310 is contacted with the end face of the bending part 120, so that the electric potentials of the arc striking piece 310 and the bending part 120 are equal, an electric arc generated when the moving contact group 200 is separated from the bending part 120 can be quickly transferred between the moving contact group 200 and the arc striking piece 310, the contact surface of the arc striking piece 310 and the bending part 120 is positioned at the outer side of the moving contact group 200 moving path, and the contact surface of the arc striking piece 310 and the bending part 120 is positioned at the outer side of the moving contact group 200 rotating radius, so that the moving contact group 200 cannot collide with the arc striking piece 310 in the switching-on and switching-off process.

It should be noted that, in the process that the moving contact set 200 moves towards the opening direction, when the moving contact set 200 is located at the just-separated position just before being separated from the fixed contact set 100, that is, when the moving contact set 200 is located at the just-separated position just before being separated from the bending portion 120 but still in contact with the current flowing through the moving contact set 100, at this time, the current flows from the body 110 of the fixed contact set 100 to the bending portion 120 and then flows from the bending portion 120 to the moving contact set 200, so that a current path is formed between the body 110 of the moving contact set 100 and the bending portion 120, and therefore, by reasonably setting the bending directions of the body 110 and the bending portion 120, the current path has at least two sections with opposite flow directions, that is, the forward projection of the current path flowing through the bending portion 120 on the current path of the body 110 is opposite to the current flow direction of the current path of the body 110, so that in the process that the moving contact set 200 continues to rotate towards the opening position from the just-separated position, the generated electric repulsive force can cause the moving contact set 200 to be quickly separated from the fixed contact set 100, thereby quickly lifting the arc extinguishing performance, and further quickly lifting the arc, and quickly pulling and pulling the arc.

Alternatively, as shown in fig. 9 and 10, the bending portion 120 may be bent from one end of the body 110 and further bent, at this time, the bending portion 120 includes a first connecting section 121 and a second connecting section 122, the first connecting section 121 is connected to the body 110, the first connecting section 121 and the second connecting section 122 are sequentially connected along the opening direction of the moving contact set 200, the second connecting section 122 contacts the striking member 310, that is, the second connecting section 122 is connected to the body 110 via the first connecting section 121, and the second connecting section 122 is closer to the opening direction of the moving contact set 200, the second connecting section 122 is opposite to the body 110 and connected to the body 110 via the first connecting section 121, and the body 110, the first connecting section 121 and the second connecting section 122 together form a U-shaped opening, the opening direction faces in a direction away from the center of the moving contact set 200, so that the contact surface of the second connecting section 122 and the striking member 310 is located at the outer side of the rotating radius of the moving contact set 200, so that the moving contact set 200 will not collide with the striking member 310 during the opening process.

Optionally, the bending portion 120 may further include only a first connecting section 121, where the first connecting section 121 is connected with the body 110, and the first connecting section 121 extends along the opening direction of the moving contact group 200, where one end of the first connecting section 121, which faces away from the body 110, contacts the arc striking member 310, and at this time, the body 110 and the first connecting section 121 form a V-shaped opening, and the opening direction faces the direction facing away from the center of the moving contact group 200, and the contact surface of the first connecting section 121 and the arc striking member 310 is located at the outer side of the rotating radius of the moving contact group 200, so that the moving contact group 200 cannot collide with the arc striking member 310 in the opening and closing process.

It should be noted that, the bending portion 120 and the body 110 may be integrally formed by bending, or the bending portion 120 may be welded on the body 110, and the connection manner of the bending portion 120 and the body 110 is not limited in the present application.

Alternatively, as shown in fig. 3 and 4, when the contact assembly 10 is applied to the dual power transfer switch, the number of the fixed contact groups 100 should be at least two, and at least two fixed contact groups 100 are distributed on opposite sides of the moving contact group 200, the fixed contact groups 100 are respectively connected with a common power source, a standby power source and a load end, the body 110 of the fixed contact group 100 connected with the common power source and the body 110 of the fixed contact group 100 connected with the standby power source are both provided with a bending part 120 matching the moving contact group 200 to be opened and closed, opposite sides of the body 110 of the fixed contact group 100 connected with the load end are respectively provided with a bending part 120, at least two arc extinguishing chambers 300 are arranged on a moving path of the moving contact group 200, and at least one arc striking member 310 contacting with the bending part 120 is arranged on both sides of each arc extinguishing chamber 300 facing the bending part 120, thereby ensuring that the electric arc generated when the moving contact group 200 is separated from any fixed contact group 100 is transferred to the arc extinguishing chamber 300, so as to avoid damage to the dual power transfer switch.

Specifically, as shown in fig. 3 and 4, a moving contact group 200, a first common static contact group 100a, a second common static contact group 100c and a first standby static contact group 100b are disposed in the dual power conversion switch, the first common static contact group 100a and the first standby static contact group 100b each have a bending portion 120, the second common static contact group 100c has a first bending portion 120a and a second bending portion 120b distributed on opposite sides of the body 110, the first common static contact group 100a is connected with a common power supply, the second common static contact group 100c is connected with a load end, the first standby static contact group 100b is connected with a standby power supply, the first common static contact group 100a and the first standby static contact group 100b are disposed on one side of the moving contact group 200, the second common static contact group 100c is disposed on the other side of the moving contact group 200, and simultaneously a first arc extinguishing chamber 300a and a second arc extinguishing chamber 300b are disposed on a moving path of two ends of the moving contact group 200, and arc extinguishing chambers 300 are disposed towards two sides of the bending portions 120 respectively.

When the common power supply works normally, the two ends of the movable contact group 200 are respectively switched on with the bending part 120 of the first common static contact group 100a and the first bending part 120a of the second common static contact group 100c, so that a circuit is connected; when the common power source fails, the movable contact group 200 starts to rotate relative to the fixed contact group 100, two ends of the movable contact group 200 are respectively contacted with the bending part 120 of the first common fixed contact group 100a and the first bending part 120a of the second common fixed contact group 100c, at this time, an arc is generated between one end of the movable contact group 200 and the bending part 120 of the first common fixed contact group 100a and between the other end of the movable contact group 200 and the first bending part 120a of the second common fixed contact group 100c, and the arc is quickly transferred to between the movable contact group 200 and the arc striking part 310 by the arc striking part 310 of the first arc extinguishing chamber 300a contacting with the bending part 120 of the first common fixed contact group 100a, and the arc striking part 310 of the second arc extinguishing chamber 300b contacting with the first bending part 120a of the second common fixed contact group 100c, so that the arc is quickly transferred to the first arc extinguishing chamber 300a and the second arc extinguishing chamber 300b; the moving contact group 200 finally rotates to the two ends to be respectively switched on with the bending part 120 of the first standby static contact group 100b and the second bending part 120b of the second common static contact group 100c, so that the moving contact group 200 is matched with the bending parts 120 of the plurality of static contact groups 100 in a switching way, and uninterrupted power supply of the power supply is ensured.

Optionally, the arc extinguishing chamber 300 has an avoidance channel, and the avoidance channel is located on a motion path of the moving contact group 200, so that the moving contact group 200 can pass through the arc extinguishing chamber 300 in a motion process, and therefore, in a brake separating process of the moving contact group 200 and the fixed contact group 100, an arc in the moving contact group 200 is transferred to the arc extinguishing chamber 300 in a motion process of the moving contact group 200 towards the arc extinguishing chamber 300, and extinction of an arc in the arc extinguishing chamber 300 is realized.

The embodiment of the application also provides a low-voltage switch, as shown in fig. 1 and 2, which comprises a housing 20, and a driving structure arranged in the housing 20 and any one of the contact assemblies 10, wherein the driving structure is in driving connection with the moving contact group 200, that is, the driving structure drives the moving contact group 200 to rotate relative to the fixed contact group 100, so that the moving contact group 200 and the fixed contact group 100 are matched in a switching-on and switching-off way.

The embodiment of the application also provides a power distribution device, wherein the power distribution device is provided with the contact assembly 10 and/or the low-voltage switch, and the power distribution device can be configured as at least one of the following: distribution box, cable, switch board, motor, switch socket, lamps and lanterns, air conditioner, electric water heater, ammeter, camera, phone, computer etc.. The power distribution devices may employ the contact assemblies 10 and/or low voltage switch related structures of the present application to achieve intelligent management, but are not limited to the above intelligent managed power distribution devices, and may also be employed in non-intelligent power distribution devices in the conventional industry.

The embodiment of the application also provides power distribution equipment, wherein the contact assembly 10 and/or the low-voltage switch are applied to the power distribution equipment, and the power distribution equipment can be applied to intelligent scenes, intelligent use scenes and the industry of the Internet of things so as to realize intelligent scene management.

Alternatively, the embodiment of the application can be used for: fire electricity consumption: the fire control system comprises a fire control room, a fire pump, a smoke prevention and exhaust facility, a fire elevator, a drainage pump, fire emergency lighting and the like; roadway lighting, duty lighting, guard lighting and obstacle marker lights; rail transit; a security system power supply; an electronic information machine room power supply; passenger elevator power; a sewage pump; variable-frequency speed-regulating constant-pressure water supply living pump (or else, a secondary load); the system comprises a main office, a conference room, a general office, an archive room.

It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided by the embodiment of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.

The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The units in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.

In the present application, the same or similar term concept, technical solution and/or application scenario description will be generally described in detail only when first appearing and then repeatedly appearing, and for brevity, the description will not be repeated generally, and in understanding the present application technical solution and the like, reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution and/or application scenario description and the like which are not described in detail later.

In the present application, the descriptions of the embodiments are emphasized, and the details or descriptions of the other embodiments may be referred to.

The technical features of the technical scheme of the application can be arbitrarily combined, and all possible combinations of the technical features in the above embodiment are not described for the sake of brevity, however, as long as there is no contradiction between the combinations of the technical features, the application shall be considered as the scope of the description of the application.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a contact assembly, its characterized in that includes close break-make cooperation static contact group (100) and moving contact group (200) be provided with explosion chamber (300) on the motion path of moving contact group (200), explosion chamber (300) have towards arc striking piece (310) that static contact group (100) extend, arc striking piece (310) with static contact group (100) butt.

2. The contact assembly of claim 1, wherein the arc chute (300) comprises a first side plate (320) and a second side plate (330) disposed opposite each other, wherein the arc striking member (310) is disposed between the first side plate (320) and the second side plate (330) and extends toward the stationary contact set (100), and wherein the arc striking member (310) is inserted into the first side plate (320) and/or the second side plate (330).

3. The contact assembly according to claim 2, wherein the arcing component (310) comprises a first arcing portion (311) and a second arcing portion (312), the first arcing portion (311) is inserted into the first side plate (320) and/or the second side plate (330), the second arcing portion (312) is connected with an end of the first arcing portion (311) and is bent relative to the first arcing portion (311), and the other end of the second arcing portion (312) extends towards the static contact group (100) and is in contact with the static contact group (100).

4. A contact assembly according to claim 3, wherein the bend of the first striking portion (311) and the second striking portion (312) is located at the opening of the arc extinguishing chamber (300).

5. The contact assembly according to any one of claims 1 to 4, wherein a spacing between the arcing member (310) and the moving contact group (200) is smaller than or equal to a spacing between the moving contact group (200) and the moving contact group (100) during a breaking process of the moving contact group (200) and the moving contact group (100).

6. The contact assembly according to any one of claims 1 to 4, wherein the movable contact group (200) rotates relative to the fixed contact group (100), the fixed contact group (100) has a bending portion (120) for matching the opening and closing of the movable contact group (200), the arc striking member (310) is in contact with the bending portion (120), and a contact surface is located outside a movement path of the movable contact group (200).

7. The contact assembly according to any one of claims 1 to 4, wherein the number of the fixed contact groups (100) is at least two, the moving contact groups (200) are used for being matched with at least two fixed contact groups (100) in a switching way, the at least two fixed contact groups (100) are distributed on two opposite sides of the moving contact groups (200), the number of the arc extinguishing chambers (300) is at least two, the at least two arc extinguishing chambers (300) are respectively located on the moving paths of two ends of the moving contact groups (200), and at least one arc striking piece (310) is arranged on two sides of the arc extinguishing chambers (300).

8. The contact assembly according to any one of claims 1 to 4, wherein the arc extinguishing chamber (300) has a relief channel, which is located in the movement path of the moving contact group (200).

9. A low-voltage switch, characterized by comprising a housing (20) and a drive structure arranged in the housing (20) and a contact assembly (10) according to any one of claims 1 to 8, the drive structure being in drive connection with a moving contact group (200) of the contact assembly (10).

10. An electrical distribution device, characterized in that the electrical distribution device is provided with a contact arrangement comprising a contact assembly (10) according to any one of claims 1 to 8.