12results about How to "Improve breaking capacity" patented technology

This utility model relates to a double-acting arc-extinguishing chamber based on ball screw transmission, including a housing, a moving contact and a stationary contact disposed within the housing, a ball screw rotatably disposed within the housing, a first fixed block fixedly connected to the moving contact, and a second fixed block fixedly connected to the stationary contact. One end of the ball screw is connected to a drive device. The ball screw has a first threaded section and a second threaded section with opposite directions of rotation. The first fixed block is threadedly connected to the first threaded section, and the second fixed block is threadedly connected to the second threaded section. A first guide rail is fixedly disposed on the housing, slidingly engaging with the first fixed block, and a second guide rail is slidably engaged with the second fixed block. This utility model, through ball screw transmission, converts rotational motion into linear motion of the first and second fixed blocks, realizing the opposite or opposite movements of the moving and stationary contacts, improving the closing and opening speeds of the arc-extinguishing chamber, shortening the breaking time, and effectively improving the breaking capacity of the circuit breaker.

The utility model discloses an exhaust structure of an alternating current circuit breaker, which relates to the field of circuit breakers and comprises a shell and an arc extinguish chamber, the shell comprises a middle cover, a left cover and a right cover, the left cover and the right cover are mounted on two sides of the middle cover, and the middle cover is provided with a plurality of first gas guide plates for guiding gas from the arc extinguish chamber to the left side and the right side. The middle cover and the left cover are matched to form a first exhaust channel, the middle cover and the right cover are matched to form a second exhaust channel, a third exhaust channel and a fourth exhaust channel, and a first outlet communicated with the first channel and a second outlet communicated with the second exhaust channel and the fourth exhaust channel are formed in the bottom of the side wall of the shell. And a third outlet communicated with the third channel is formed in the upper surface of the shell. The utility model has the advantages of space saving and good safety.

This invention discloses a novel liquid nitrogen switch with adjustable opening distance, comprising a housing, and further comprising: a permanent magnet operating mechanism on the outside of the housing sidewall; a main shaft rotatably connected to the permanent magnet operating mechanism; a trip spring arm fixedly connected to the main shaft; a trip spring connected at one end to the trip spring arm; a vertically arranged channel steel; a positioning block fixed to the side of the channel steel; an insulating pull rod fixedly connected to the main shaft; two protrusions opposite each other at the lower end of the insulating pull rod; two annular vertical plates on the moving contact rod, with the protrusions abutting between the two annular vertical plates; a copper-tungsten alloy electrode disposed at the front end of the moving contact rod; and a stationary conductive element disposed opposite to the copper-tungsten alloy electrode. This invention uses a permanent magnet operating mechanism as the operating mechanism, and limits the range of motion of the main shaft by changing the size of the positioning block to achieve an adjustable switch opening distance. A high-pressure glass observation window is also provided to meet the need for observing the liquid nitrogen arc in experiments.

The application relates to the field of low-voltage electrical apparatuses, in particular to an arc extinguishing device, wherein a front moving contact and a front static contact are oppositely matched along a direction d1, a rear moving contact and a rear static contact are oppositely matched along the direction d1, a front arc extinguishing chamber and a rear arc extinguishing chamber are arranged side by side and at intervals along a direction d2, and a conductive cross beam is connected in series between the front static contact and the rear static contact and extends along the direction d1; in a direction d3, the conductive cross beam and an arc inlet end of the front arc extinguishing chamber form a front contact area for closing and opening a front moving contact point of the front moving contact and a front static contact point in the front static contact, the conductive cross beam and an arc inlet end of the rear arc extinguishing chamber form a rear contact area for closing and opening a rear moving contact point of the rear moving contact and a rear static contact point in the rear static contact, and the front contact area and the rear contact area are arranged side by side and at intervals along the direction d2; the direction d1, the direction d2 and the direction d2 are perpendicular to each other; and the arc extinguishing device has high arc extinguishing efficiency and effect.

The application discloses a kind of high surface natural micropore structure regulation-based high surface withstand voltage polyimide and preparation method and application thereof, belong to high voltage insulating material technical field, after drying diamine is dissolved in solvent A, then add dianhydride, after stirring uniformly, obtain polyamide acid solution;Add pore forming agent again, high-speed stirring is uniformly dispersed, obtain mixed viscous solution C;After coating, drying, imidization high temperature heating, and natural cooling, immerse in liquid B and extract pore forming agent, after drying, obtain high surface natural micropore structure regulation-based high surface withstand voltage polyimide.The polyimide surface has natural pore structure, surface is along the surface of electric field, and the through-hole structure is densely distributed along the surface of electric field, and the electron is easy to drop into the through-hole structure in the jumping multiplication process when flashover, and it is difficult to return to the surface, so that the secondary electron multiplication process is inhibited, the probability of forming secondary electron avalanche is reduced, so as to realize the improvement of surface withstand voltage.

The application relates to the technical field of circuit breakers, and discloses a small-sized DC circuit breaker which comprises a circuit breaker body, a static contact is arranged on the circuit breaker body, an operating mechanism is rotationally connected to the circuit breaker body, a dynamic contact is arranged on the operating mechanism, a first magnet and a second magnet are arranged on the circuit breaker body, the first magnet and the second magnet have the same magnetism, a first channel for separating the dynamic contact and the static contact is formed between the first magnet and the second magnet, and the first channel can repel an electric arc. The application can form a strong magnetic field region between the first magnet and the second magnet, a strong electric arc generated when the dynamic contact and the static contact are disconnected can be rapidly driven away from a contact gap, and the electric arc can be directionally stretched and cooled along the first channel, so that the electric arc can be effectively prevented from stagnating in the contact region, gathering energy and continuously burning, the degree of burning of a contact surface is reduced, the extinction efficiency of the electric arc is improved, and the breaking capacity, electrical life and working stability of the circuit breaker body are improved.

The application relates to the field of low-voltage electrical apparatus, in particular to a static contact structure, a front static contact of which comprises a front bearing plate and a front static contact point, the front bearing plate comprising a front bearing main plate provided with the front static contact point on one side; a rear static contact comprises a rear bearing plate and a rear static contact point, the rear bearing plate comprising a rear bearing main plate provided with the rear static contact point on one side; a conductive cross beam extends along a direction d1; in a direction d2, the front static contact point and the rear static contact point are arranged in a staggered mode; in a direction d3, the front bearing main plate and the rear bearing main plate are located on the same side of the conductive cross beam; the direction d1, the direction d2 and the direction d3 are perpendicular to each other; the static contact structure is applied to a circuit breaker, and can improve the breaking capacity and the arc extinguishing efficiency and effect.

This utility model relates to an air outlet structure for a miniature circuit breaker. By setting a first air outlet and a second air outlet on the housing, a multi-channel arc-extinguishing path is formed. During the operation of the circuit breaker, the electric arc and heat generated inside can be quickly dissipated through these two air outlets, preventing the airflow from interfering with each other within the arc-extinguishing assembly. This effectively reduces the residence time of the electric arc inside the circuit breaker. The first air guide wall between the arc-extinguishing assembly and the first air outlet, and the second air guide wall between the arc-extinguishing assembly and the second air outlet, play a role in precisely guiding the airflow. When an electric arc is generated, the air guide wall can guide the airflow in an orderly and uniform manner to the arc-extinguishing assembly, forming a stable and suitable airflow field around the arc-extinguishing grid. This airflow field helps to quickly remove the heat and plasma generated by the electric arc, accelerate the arc extinguishing process, improve the arc extinguishing efficiency, reduce the erosion of the internal components of the circuit breaker by the electric arc, and enhance the breaking capacity and reliability of the circuit breaker.

A moving contact mechanism and circuit breaker are disclosed, comprising: a contact support having a first surface and a second surface; the first surface having a first mounting surface; a positioning shaft being provided on the first mounting surface; and a mating wall being provided on one side of the first mounting surface, the mating wall having a positioning groove; a moving contact having a circular hole adapted to the positioning shaft, being mounted on the first mounting surface, and the moving contact extending towards the stationary contact to form a positioning block, the positioning block being adapted to the positioning groove; a torsion spring sleeved on the positioning shaft, one end of which overlaps with the contact support, and the other end of which overlaps with the moving contact; a latch rotatably disposed on the second surface of the contact support; and a jump catch rotatably disposed on the second surface of the contact support and overlapping with the latch. This application utilizes the engagement of the positioning block of the moving contact with the positioning groove of the contact support to limit the swing of the moving contact on the contact support, ensuring that the position of the moving contact in contact with the stationary contact remains consistent each time.

The application discloses an electrical protection device for a low-voltage circuit, comprising a protection shell, a double-contact assembly, a contact seat assembly, an arc blowing assembly and an arc extinguisher, in order to solve the technical problem that the general electrical protection device in the prior art has slow arc extinguishing speed, limited breaking capacity, and the contact is easy to be ablated and damaged when frequently breaking the arc, and lacks a mechanism for preventing misoperation after fault tripping, resulting in insufficient safety, the application designs the above-mentioned electrical protection device for a low-voltage circuit, the double-contact assembly is used for realizing isolation protection of the arc and the main contact, the arc blowing assembly and the arc extinguisher are used for accelerating the movement and extinguishing of the arc in a cooperative manner, and the self-locking mechanism is used for preventing misoperation after fault, so that the breaking performance and operation safety of the device are improved, and the stable operation of the low-voltage circuit system is ensured.

The application discloses a contact arc extinguishing system and a circuit breaker. The contact arc extinguishing system comprises a contact system, at least one contact unit, each contact unit comprising a main contact mechanism and an arc contact mechanism which are independent of each other and are arranged side by side and spaced apart along a first direction; an arc extinguishing system, at least one arc extinguishing unit, the arc extinguishing unit corresponding to the contact unit one by one, and on the same side of the corresponding main contact mechanism, the arc extinguishing unit and the corresponding arc contact mechanism are spaced apart and electrically connected along a second direction; a connecting assembly, comprising a conductive connecting assembly and a transmission connecting assembly, the conductive connecting assembly connects the main contact mechanism and the arc contact mechanism to form a conductive loop, the transmission connecting assembly extends along the first direction, and the two ends of the transmission connecting assembly are respectively connected in a transmission mode to the main contact mechanism and the arc contact mechanism to control the synchronous action of the main contact mechanism and the arc contact mechanism. The contact arc extinguishing system and the circuit breaker have high arc extinguishing capacity and are aimed at improving the breaking performance of the circuit breaker.