10results about How to "Shorten the arcing time" patented technology

According to the relay, when a first contact part and a second contact part are separated from each other or make contact with each other to generate an electric arc, a magnetic field formed by a first permanent magnet can play a traction role on the electric arc, and the arc blowing and arc discharging effects are achieved. The electric arc moves along the contact surface, and when the electric arc moves to the arc isolating groove, the arc isolating groove can play a role in isolating, lengthening and blocking the electric arc, so that the arcing time is shortened. Therefore, the defects that the electric arc ablates the inner cavity and causes relay explosion and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the product failure probability can be reduced. And meanwhile, the first contact part is synchronously contacted with the at least two sheet units, and the first contact part and the second contact part have at least two contact points, so that the shunting effect is achieved, the contact resistance can be reduced, the contact stability and reliability can be improved, and the temperature rise can be reduced.

The application relates to an electromagnetic relay, which comprises a main contact part and a permanent magnet. A magnetic circuit part comprises an armature. The main contact part comprises a main static spring assembly and a main dynamic spring assembly. The main static spring assembly comprises a main static spring piece and a main static contact point arranged on the main static spring piece. The main dynamic spring assembly comprises a main dynamic spring piece and a main dynamic contact point arranged on the main dynamic spring piece. The main static contact point is arranged opposite to the main dynamic contact point. The permanent magnet is arranged on the side of the main static contact point away from the main dynamic contact point or on the side of the main dynamic contact point away from the main static contact point. The permanent magnet can form a longitudinal magnetic field between the main static contact point and the main dynamic contact point. Through longitudinal arc blowing, the electromagnetic relay can effectively reduce the burning loss of the main static contact and the main dynamic contact by an arc, shorten the arc burning time, and thus improve the electrical endurance and reliability of the electromagnetic relay.

The utility model discloses a direct current relay, comprising a contact system which comprises a movable contact piece and a static contact piece which are matched with each other, and the movable contact piece is contacted with or disconnected from the static contact piece under the driving of a magnetic circuit system of the direct current relay; the arc extinguishing magnetic assembly comprises a special-shaped permanent magnet, and at least one end of the special-shaped permanent magnet is bent towards one side, so that a magnetic field on the bent side forms a magnetic line gathering area; the contact system is configured to be located on the bent side of the special-shaped permanent magnet and arranged corresponding to the magnetic line gathering area of the special-shaped permanent magnet. When the special-shaped permanent magnet is used as a carrier of an arc extinguishing magnetic field, most of the magnetic field generated by the special-shaped permanent magnet is concentrated towards the middle, that is, magnetic lines of force on the arc-shaped inner surface of the special-shaped permanent magnet are high in concentration degree at the central position of a contact and can better correspond to the contact part, so that a good arc extinguishing effect is achieved; in other words, compared with a square permanent magnet, the arc-shaped block-shaped permanent magnet is more beneficial to achieving utilization maximization of an arc extinguishing magnetic field, the initial moving speed of the arc is increased, and the arcing time is shortened.

The utility model relates to a quick opening contactor structure, which comprises a reverse spring bracket, the number of the first rotating arms is two, and the first rotating arms are obliquely and symmetrically hinged to the same reverse spring support. The second rotating arm is nested at the other end of the first rotating arm, and the lower end of the second rotating arm is detachably and rotatably arranged on the lower base; the spring is arranged in the second rotating arm and abuts against the first rotating arm and the second rotating arm. The movable support assembly is located at the upper ends of the two reverse spring supports and rapidly moves upwards under the counter-acting force of the reverse spring supports after the external force is lost. According to the utility model, the structure is compact and reasonable, the operation is convenient, through the special structural design of the reverse spring assembly, the counter-acting force of the spring is increased, the opening time of the contactor is shortened, the arcing time of the moving and static contacts is reduced, the electrical ablation of the contacts is reduced, and the service life of the whole machine is prolonged.

The invention relates to the technical field of circuit protection devices, in particular to a double-layer arc-extinguishing flat plate type fuse which comprises an insulating shell, a melt and a composite arc-extinguishing core, the melt is provided with a center fusing area and a terminal area which are integrally formed, and the composite arc-extinguishing core is arranged in the insulating shell and surrounds the center fusing area. A first arc extinguishing cavity for accommodating a gas production material is formed in the first arc extinguishing chamber to form a first arc extinguishing layer; and a second arc extinguishing cavity filled with an arc extinguishing medium is formed between the insulating shell and the composite arc extinguishing core body to form a second arc extinguishing layer. According to the invention, during breaking, high-pressure airflow can be quickly generated to suppress electric arcs in a segmented manner, and continuous cooling and insulation are realized by an external medium, so that the arcing time is greatly shortened, the internal pressure is effectively controlled, the shell is prevented from bursting, and the breaking capacity, safety and reliability of high-voltage and large-current faults are remarkably improved.

The invention discloses a large-current high-breaking plug-in circuit breaker, comprising a moving contact, a stationary contact, an arc extinguishing chamber, an arc-strike assembly and an arc-guiding acceleration structure arranged on a shell structure. The arc-strike assembly is arranged on both sides of an arc-entry opening in the length direction of the arc-extinguishing chamber. The arc-guiding acceleration structure comprises a magnetizing assembly arranged on both sides of the arc-entry opening in the width direction, and an arc-guiding channel surrounding the moving and stationary contacts, which is formed by connecting the magnetizing assembly, the arc-strike assembly and the shell structure. The cross-sectional width of the arc-guiding channel gradually decreases from the arc-entry opening to the moving contact side. The arc is further accelerated to move in the direction of the arc-entry opening by forming an air pressure difference in the arc-guiding channel and by the magnetic blowing effect of the magnetizing assembly on the arc. The arc-strike efficiency is high and the cooling of the arc can be accelerated by the combined effect of the arc-guiding channel and the magnetizing assembly, thereby avoiding the burning of other parts such as the contacts by the arc, and improving the electrical life and breaking capacity of the circuit breaker.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.

The utility model provides a contact structure of a dual-power change-over switch, which comprises a contact support movably mounted on a shell and provided with at least one moving contact; the static contact is fixed on the shell and is arranged corresponding to the moving contact; and the arc blocking sheet comprises a fixed part attached to the static contact and an arc blocking part perpendicular to the fixed part, and the fixed part is fixed with the static contact through a fastener. In this way, electric arcs and metal particles generated during breaking can be jetted to the arc blocking piece, electric arc energy can be consumed, the metal particles can be attached to the arc blocking piece, and therefore damage to the shell and a wire is reduced, further, the arc blocking piece is made of gas generating materials, the arc blocking piece can consume oxygen in the shell due to high-temperature ablation, and the arc blocking piece is made of gas generating materials. West gas and anaerobic ions can be generated, so that the arcing time is shortened, and the electrical wear of the contact is reduced. In addition, the arc blocking sheet is directly installed on the static contact, so that the installation is faster and more convenient.

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses an arc extinguishing structure and a low-voltage electric appliance. The arc extinguishing structure provided by the utility model comprises a static contact assembly and an arc extinguishing chamber, the static contact assembly comprises a static contact, the static contact is provided with a static contact, the arc extinguishing chamber comprises an arc extinguishing member and a plurality of grid sheets arranged at intervals, the other end of the arc extinguishing member extends along a first direction, and the first direction is the arrangement direction of the plurality of grid sheets. The other end of the arc extinguishing member is obliquely arranged from the static contact or one of the grid sheets, and the distance between the arc extinguishing member at the inclined part and the end part of the first end of the grid sheet is gradually reduced, so that the arc can enter the grid sheet more quickly and more easily, the arcing time during breaking of a low-voltage electric appliance is shortened, the arc breaking capacity of the contact is improved, and the service life of the contact is prolonged. Temperature rise in the contact is reduced, and the service life of a low-voltage electric appliance is prolonged.

The utility model relates to a relay. At least one of the outer side part of a first contact part and the outer side part of a second contact part is provided with a first avoiding part for avoiding each other. When the first contact part and the second contact part are separated from each other or are in contact with each other so that an electric arc is generated at the contact unit, a magnetic field formed by the first permanent magnet can play a traction role on the electric arc, and arc blowing and arc discharge effects are achieved. The electric arc moves along the contact surface of the contact unit, when the electric arc moves to the first avoiding part, the first avoiding part can play a role in separating, lengthening and blocking the electric arc, and the arcing time is shortened. Besides, the first avoiding part is arranged according to the magnetic blow-out path, so that the positions of the first contact part and the second contact part are relatively controllable, meanwhile, the contact area is relatively small, the position of an arcing point is more controlled, and the arc isolation effect is obvious. Besides, the defects that the inner cavity is ablated by an electric arc and the relay explodes and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the failure probability of the product can be reduced.