110results about How to "Strong breaking ability" patented technology

The invention relates to a hydrocracking catalyst with high activity and high-medium oil selectivity. According to the hydrocracking catalyst, amorphous silicon aluminum is used as a carrier, and a specially-modified Y-type molecular sieve is used as acid component, the molecular sieve has high degree of crystallization and low cell parameters, rich secondary holes, large surface area, less uniformly-distributed acid sites, no strong acid center, and most of medium-strength acid centers, and also has strong nitrogen-resisting performance and better damage capacity; and the hydrocracking catalyst using the molecular sieve has high hydrocracking activity and high middle oil selectivity, and stronger nitrogen resisting capacity. The catalyst provided by the invention is used in the process of producing an intermediate distillate product by adopting a heavy hydrocarbon single-section or one-section hydrocracking process, and has better activity and middle oil selectivity.

The present invention provides a rubber composition for a breaker, which achieves both good fuel economy and good breaking performance while simultaneously having excellent processability, and a pneumatic tire including a breaker produced using the rubber composition. The present invention relates to a rubber composition for a breaker, including: a rubber component that contains a modified natural rubber, the rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the rubber composition contains 5% by mass or more of the modified natural rubber based on 100% by mass of the rubber component.

The invention discloses a circuit breaker which comprises a housing, a contact mechanism, an arc extinction system, an operation mechanism and a magnetic tripping mechanism, wherein the contact mechanism comprises a dynamic contact and a static contact; a dynamic contact point is arranged on the dynamic contact; a static contact point is arranged on the static contact; the arc extinction system comprises an arc extinction system chamber; the arc extinction chamber is provided with an arc extinction grid-plate, an arc isolation plate and an arc striking assembly; the arc striking assembly comprises an upper arc striking plate and a lower arc striking plate; the lower arc striking plate is connected with a bimetallic strip; the bimetallic strip is matched with the dynamic contact in a linkage manner; the operation mechanism comprises a handle, a main bracket, a linkage assembly and a lock catch assembly; the lock catch assembly comprises a lock catch and a jump catch; the magnetic tripping mechanism comprises an iron core, a coil and a magnetic yoke; the arc extinction chamber comprises an arc inlet end and an arc outlet end; the arc outlet end is provided with arc outlet shunting partition regions which are a first arc outlet region and a second arc outlet region respectively; and arc guide outlets communicated with the first arc outlet region and the second arc outlet region are formed in the housing. The circuit breaker has the advantages of good breaking capacity, excellent arc extinction effect, safety and reliability.

The invention relates to a double-power-source automatic change-over switch comprising a controller, a change-over device, a contact system, and micro switches. The change-over device comprises a mechanism frame, a motor, a gear reversing assembly, and a change-over assembly. The change-over assembly comprises a transmission disc and two transmission arms. The two transmission arms are each equipped with an energy storage mechanism. A first transmission component and a second transmission component are respectively fixed to the upper end faces of the two transmission arms. The upper ends of the first transmission component and the second transmission component are correspondingly installed on a first moving contact support and a second moving contact support of the contact system. The two transmission arms are respectively arranged at the two sides of the transmission disc. The transmission disc includes two rotating plates and two shifting rods. The two transmission arms are each provided with clamping grooves corresponding to the shifting rods. The shifting rods can slide in the corresponding clamping grooves when rotating along with the transmission disc, and the two shifting rods can drive the corresponding transmission arms to rotate. The double-power-source automatic change-over switch of the invention has the advantages of small size, strong breaking capacity, and stable and reliable performance.

A permanent magnetic contactor and its control device are used in starting switch control devices and engines and switching on and off the master circuit. A permanent magnetic steel is set between two static cores to form a U-like bulk, two iron cores connected in series and in a same polarity, a tower spring supports the framework of the packet, the top of the tower spring is connected with a dynamic core. The output over voltage protection part of said control device is connected with the rectification part, output of which is connected with a low-voltage judgment part the output of which is connected with a shut off executing part and the output of which is connected with the wire packet.

The invention relates to an electric meter box, in particular to a power purchase type intelligent electric meter box. The electric meter box comprises a power supply device, an electric meter, a breaker and a terminal, wherein the power supply device is arranged in the box body; the power supply device is connected with the electric meter and the breaker through a current inductor. The electric meter box is characterized in that a signal booster is arranged in an electric meter box body; an indicating part and an interacting platform are arranged on the outer side of an inner door of the box body; a high-receiving sensitivity antenna is arranged outside the box body through a universal joint; the breaker and the terminal are connected with the indicating part; the breaker, the electric meter, the interaction platform and the signal booster are connected with a current-using management terminal; the signal booster is connected with the high-receiving sensitivity antenna; the breaker, the current-using management terminal and the indicating part form an alarming-tripping circuit. The electric meter box has the advantages that equipment is advanced, layout is reasonable, the electric meter box can prevent electric shock, on-site switching on/off is realized, signal boosting is realized, and the function of an interaction platform is realized.

The invention provides a circuit breaker. Upon switching on, a wrench is placed at a first position, and a secondary moving contact compresses a first elastic element, and the secondary moving contact and the secondary static contact are in contact, and at the same time, a primary moving contact and a primary static contact are kept disconnected; the wrench is placed at a second position, and the secondary moving contact further compresses the first elastic element, and the secondary moving contact and the secondary static contact are kept connected, and at the same time the primary moving contact and the primary static contact are in contact. A second terminal is connected to a current-carrying plate, and the primary moving contact and the secondary moving contact are connected to the current-carrying plate through a lead. The contact of the circuit breaker takes up small space, has low product cost, low contact electric worn, can interrupt short circuit operation of more than 50 kA on a micro-circuit breaker, which is extremely convenient for applications to special scenarios.

The invention provides a contact of a vacuum arc extinguishing chamber. The contact comprises a first contact and a second contact. The first contact is connected with a first conducting rod, and the second contact is connected with a second conducting rod. An arc ignition contact is arranged on and protrudes out of an end surface of the first contact. The arc ignition contact is connected inside the first conducting rod by a spring. An auxiliary contact is arranged on an end surface of the second contact and is used to cooperate with the arc ignition contact to generate an arc. The invention provides the contact reducing the breakdown field strength, controlling the arcing point, improving the interrupting capability of the vacuum arc extinguishing chamber, and having a low cost.

The invention discloses a selective protection circuit breaker. A main circuit consists of a first wire connection device, a first bimetallic strip, a main contact, an electromagnetic system and a second wire connection device which are connected in series; a branch circuit consists of an auxiliary contact, a current-limiting resistor and a second bimetallic strip which are connected in series; and two ends of the branch circuit are connected in parallel to two sides of a main contact device. An operating mechanism is arranged on the middle upper part of a shell; an auxiliary contact device is arranged on the lower left part of the operating mechanism; the main contact device is arranged on the middle lower part of the shell; the electromagnetic system is arranged on the upper right part of the shell; the first and second bimetallic strips are arranged on the left part of the shell; and the current-limiting resistor is arranged on the upper left part of the shell. The selective protection circuit breaker also comprises a first clapboard and a second clapboard for dividing the shell into a layer A space and a layer B space in the thickness direction; first and second arc extinguishchambers are formed respectively in the layer A space; and the first and second bimetallic strips and an electromagnetic push rod of the electromagnetic system are arranged in the layer B space. The circuit breaker has the advantages of reasonable and compact structural layout, convenient assembly and debugging, high braking capacity and high reliability.

The invention provides a breaker provided with an arc extinguishing mechanism with magnetic blowing and air-blowing functions, and mainly aims at solving the problems of poor breaking capacity and poor arc extinguishing effect due to the fact that the arc extinguishing mechanism of the breaker only has the magnetic blowing function or the air-blowing function. The breaker is characterized by also comprising a magnetic blowing device (4) and a gas production plate (5), wherein the magnetic blowing device (4) and the gas production plate (5) are correspondingly arranged between a static contact (22) and an arc extinguish chamber (3) and are used for guiding an electric arc generated when a moving contact (21) is separated from the static contact (22) to the arc extinguish chamber (3). According to the breaker provided with the arc extinguishing mechanism with the magnetic blowing and air-blowing functions provided by the invention, a magnetic blowing mechanism and the gas production plate are also arranged between the static contact and the arc extinguish chamber; and the electric arc generated when the moving contact is separated from the static contact is guided to the arc extinguish chamber, so that the arc extinguishing efficiency is improved; and the breaking capacity is relatively high.

An arc extinguishing system of a DC contactor comprises two static contacts (1, 1'), a moving contact (2) and at least two permanent magnets; the two static contacts (1, 1') are connected to or disconnected from the two ends of the moving contact (1) to realize ON/OFF of the contactor; and the system is characterized in that the two permanent magnets are installed in a connecting line of the two static contacts (1, 1') and positioned between the two static contacts (1, 1'). The whole arc extinguishing system is small in size, high in disconnecting capability, simple in structure, convenient toassembly, and capable of non-polarity rapid arc extinguishing.

The invention provides a small-sized circuit breaker, comprising a shell, a double-gold sheet, a lock buckle, an arc extinguish chamber, a wiring column, a movable contact, a movable contact bracket and a shaft passing through the movable contact bracket, wherein the double-gold sheet comprises a double-gold sheet fixed end and a double-gold sheet movable end; the small-sized circuit breaker is further provided with a separation plate which is located between the double-gold sheet and an arc striking sheet; the separation plate corresponds to the shell to form a cavity ,and the double-gold sheet is arranged in the cavity. According to the small-sized circuit breaker, the double-gold sheet is not affected by the heating of other elements; in addition, an magnetic field generated by electric arcs on the double-gold sheet is separated from the magnetic field generated by the electric arcs of the arc striking sheet and the magnetic fields do not interfere with each other, so that the arc-striking effect of the arc striking sheet is good, and the breaking performance of the circuit breaker is good.

The invention discloses a miniature fuse, which consists of two wiring terminals, a substrate, a melt and an arc-extinguishing glass layer, wherein the melt is positioned on the surface of a ceramic sheet; the two wiring terminals are respectively electrically connected with the two ends of the melt; the arc-extinguishing glass layer, which covers the surface of the melt, is an arc-extinguishing glass sheet which consists of borosilicate lead glass; a plurality of micro-nano holes are formed on the surface of the arc-extinguishing glass sheet, which is contact with the melt; the melt is formed by electric conductive paste containing spherical or approximately-spherical metal particles through screen printing; the metal particles are 80 to 100 nm in diameter; hollow areas are arranged in the central areas in the metal particles; the micro-nano holes are 20 to 500 nm in diameter; the intervals between adjacent micro-nano holes are one to five times of the hole diameters of the micro-nano holes; and the hole depths of the micro-nano holes are one to 10 times of the hole diameters. The miniature fuse disclosed by the invention can effectively avoid the phenomenon of arc discharge and provides high insulation impedance.

The invention discloses a switching device with lever ratio, comprising a shell, a rocker arm, a rotating shaft, a contact support, a moving contact bridge and a fixed contact, wherein the rocker arm is rotatably arranged on the rotating shaft; one end of the rocker arm is a driving end and the other end of the rocker arm is a driven end; the contact support is in contact connection with the driven end of the rocker arm driving the contact support to move; the side of the contact support, which is close to the fixed contact, is provided with the moving contact bridge; and the lever ratio of the distance b between the driven end of the rocker arm and the center of the rotating shaft and the distance a between the driving end of the rocker arm and the center of the rotating shaft is more than 1. The switching device has the beneficial effects of strong breaking capability, long service life, simple structure, low cost and convenience in installation.