80results about How to "Improve the electric field" patented technology

The invention discloses an aluminum electrolysis cell cathode structure of horizontal current in controllable regulation aluminum liquid. A continuously or partially bulged cathode steel bar is used or a cushion material with high electric conductivity is cushioned at the partial position between a common rectangular steel bar and a cathode carbon block, so that the distribution and the size of the horizontal current in the aluminum liquid can be readjusted by the cathode structure. Structural parameters are determined by the cathode structure according to an actual groove-type design, the horizontal current in the aluminum liquid can be obviously reduced when the cathode structure is used in an aluminum electrolysis cell, and the distribution of the horizontal current in the aluminum liquid can be optimized to prevent an area with higher horizontal current density from being superposed with an area having a larger vertical magnetic field, so that the effects of weakening the vertical fluctuation of the aluminum liquid and stabilizing the horizontal motion of a melt are achieved; therefore, electrolysis can be operated within a relatively short electrode distance, energy consumption can be reduced greatly, and the cathode structure is easy and convenient to process and is easy to realize.

The invention provides an extra-high voltage transformer lead shielding device comprising a first equalizer, a pressure equalizing ball and a second equalizer, wherein one end of the pressure equalizing ball is movably connected with the first equalizer, and the other end is fixedly connected with the second equalizer; parallel leads of the transformer are perforated in the first equalizer, the pressure equalizing ball and the second equalizer; a first equipotential connection line is connected between the pressure equalizing ball and the first equalizer; one segment of the parallel leads of the transformer in the pressure equalizing ball is connected out of the external lead which is educed outside the transformer through a sleeve inserted into the pressure equalizing ball; and a second equipotential connection line is connected between the first equalizer and the parallel lead. The extra-high voltage transformer lead shielding device can improve the magnetic field, is convenient to install and does not stress during pressure installation of the transformer body, thereby improving the safety in the installation process.

The invention discloses a sulfur hexafluoride gas insulating transformer which includes an iron core, a low voltage loop, a high voltage loop, the upper end insulator of the low voltage loop, the lower end insulator of the low voltage loop, the upper end insulator of the high voltage loop, the lower end insulator of the high voltage loop, the main insulating paper cylinder of the loop and the bar stay of the loop, a loop pressure pad and a splint for a core and winding assembly; the expansion lines of the beginning end and the tail end of the low voltage loop respectively cross the insulators of the upper and the lower ends, and the loop pressure pad and the splint for the core and winding assembly to lead out the core and winding assembly from the two ends of the core and winding assembly; the high voltage loop is divided into an upper path and a lower path in parallel; the high voltage loop is twisted by adopting an inner shielding-continuous mode; a plurality of winding coils at the starting end of 110KV of the high voltage loop adopt double-section screen structures; the expansion lines of the beginning ends of 110KV of the upper half path and the lower half path of the high voltage loop penetrate the core and winding assembly and are led out from the middle part; the expansion lines of the tail ends of the upper half path and the lower half path of the high voltage loop penetrate of the high voltage loop penetrate the insulators of the upper and the lower end parts of the high voltage loop, the loop pressure pad and the splint for the core and winding assembly and lead out the core and winding assembly from the two ends of the core and winding assembly. The localized concentration of the electric field at the end part of the loop of the transducer of the transformer is low; the anti-short circuit ability of the high voltage loop is high; the manufacture is easy; the materials are saved and the cost is low.

The invention provides a semiconductor device and a manufacturing method thereof. The method comprises the steps of: providing a semiconductor substrate formed with a body region, a gate dielectric layer and a field oxide layer; forming a gate polycrystal, wherein the gate polycrystal covers the gate dielectric layer and the field oxide layer and exposes at least part of the field oxide layer; forming a drift region in the semiconductor substrate by ion implantation with the drift region masking layer as a mask, and continuously removing the exposed field oxide layer with the drift region masking layer as a mask to form a first field oxide self-aligned with the gate polycrystal, wherein the gate polycrystal is used as a first field plate; forming a source region in the body region, and forming a drain region in the drift region; forming a second field oxide on the semiconductor substrate; and forming a second field plate on the second field oxide. According to the manufacturing methodof the semiconductor device, the two-stage field plates are formed, so that the depletion of the drift region is enhanced while the electric field of the grid electrode boundary is improved, and the breakdown voltage of the device is improved.

The present invention belongs to the power technology equipment manufacture technical field and relates to a direct-current basin type insulator. The environmental insulation property of an SF6 gas under a direct-current voltage are very different from the environmental insulation property of the SF6 gas under alternating current, and controlling charge accumulation and reducing surface charges during the long-term operation of an insulator have become key technologies and difficulties in the study of direct-current GIL (Gas-insulated transmission line) insulators. The direct-current basin type insulator provided by the invention comprises a central insert; the outer side of the central insert is provided with an epoxy aluminum oxide composite member; one end of the epoxy aluminum oxide composite member is connected with the central insert; the other end of the epoxy aluminum oxide composite member is connected with a flange; the central insert comprises a first intersection point; theflange comprises a second intersection point; and an included angle between a connection line between the first intersection point and the second intersection point and a horizontal plane is not larger than 20 degrees. Therefore, a normal electric field component can be greatly reduced under a premise that a horizontal electric field component is not increased, and therefore, surface charge accumulation can be suppressed, and the operational stability of the direct-current basin type insulator under direct current can be improved.

The invention discloses an aluminum cell side conductive cathode structure for reducing a horizontal current of molten aluminum. The horizontal current in the molten aluminum can be greatly reduced through installing and using a horizontal or inclined conductive side cathode steel rod. A structure parameter of a cathode is determined according to an actual cell type design, the horizontal current in the molten aluminum can be remarkably reduced when the cathode is applied to the aluminum cell, the distribution of the horizontal current in the molten aluminum is optimized and the cathode voltage drop is reduced, thus the functions of weakening the vertical fluctuation of the molten aluminum and stabilizing the horizontal movement of the molten aluminum are achieved so that an electrolysis can be stably carried out at a low voltage, and the energy consumption is greatly reduced. The aluminum cell side conductive cathode structure is convenient and simple to process, easy to realize, low in cost and little in influence on service life of an inner linear of the cell.

The present invention relates to a direct connection module and its switchgear. The direct connection module comprises: a casing, which is in the shape of a cylinder, and has two axial openings and a radial opening; The other end of the housing is fixedly connected to one of the two axial openings; an insulator is fixedly connected to the radial opening; a radial conductor is located in the housing and one end is connected to the radial opening. The insulator is fixedly connected; an axial conductor is located in the casing, and one end is fixedly connected to the oil and gas bushing, and the other end is connected to the other end of the radial conductor, wherein the axial conductor has a movable connect. The cost of the direct connection module of the present invention is low, and the conductors therein can be removed conveniently and quickly. The invention also relates to a switchgear with a direct connection module as described above.

The invention relates to the technical field of medicines, in particular to a medication system. An electret nanoparticle cutaneous penetration system comprises an isolated layer, wherein a drug-contained pressure-sensitive adhesive layer is arranged on the inner side of the isolated layer, an electret layer made of electret materials is arranged on the outer side of the isolated layer, and a controlled release film layer is arranged on the inner side of the drug-contained pressure-sensitive adhesive layer; the electret layer, the isolated layer, the drug-contained pressure-sensitive adhesive layer and the controlled release film layer are arranged in sequence from outside to inside to form a depot patch; tourmaline powder particles are distributed in the drug-contained pressure-sensitive adhesive layer. According to the electret nanoparticle cutaneous penetration system, the tourmaline powder particles are mixed into the drug-contained pressure-sensitive adhesive layer, so that the electret nanoparticle cutaneous penetration system has the advantages of promoting blood circulation of a human body, enhancing the vitality of cells, improving an electret electric field, replenishing mineral substance for the human body and the like.

The invention relates to an electric connection structure and a connector thereof, and the electric connection structure comprises the connector and a connecting seat; the connector is provided with aconductive plugging part, and the conductive plugging part is used for being plugged into a conductive plugging hole in the connecting seat; the connector is fixedly provided with a shielding cover,and the connector is provided with a cylindrical shielding structure, wherein the cylindrical shielding structure is located at the radial outer side of the conductive plugging part and is coaxially arranged with the conductive plugging part; the cylindrical shielding structure and the main body part of the connector are integrally formed, an overhanging structure is formed on the main body part of the connector, and an annular space between the cylindrical shielding structure and the conductive plugging part forms an avoidance interval for avoiding the hole wall of the conductive plugging hole; the shielding cover is formed by a cylindrical shielding structure; the cylindrical shielding structure and the main body part of the connector are integrally formed, so a mounting space for assembling a screw is prevented from being reserved on the connector, the influence of the screw on the electric field of the electric connection structure is avoided, and the arrangement of the shielding cover in the electric connection structure is not limited by the screw connection structure.

The invention discloses a voltage guiding device, a sealing device and a method for manufacturing an insulating hydrophobic coating layer. The surface of the voltage guiding device is coated with an insulating hydrophobic coating layer for increasing a surface contact angle. The voltage guiding device comprises a lead, an external mounting flange, an internal mounting flange, an outer side grading shield, and an inner side grading shield. The lead penetrating a wall body of a sealing device is used for guiding a needed voltage into the inside of the sealing device. The external mounting flange is installed at the outer side of the wall body; and a screw hole for fixation is arranged at the connection part of the external mounting flange and the outer side of the wall body, thereby realizing fixed connection between a guiding rod and the wall body. The internal mounting flange is installed at the inner side of the wall body; and a screw hole for fixation is arranged at the connection part of the internal mounting flange and the inner side of the wall body, thereby realizing fixed connection between the guiding rod and the wall body. The outer side grading shield is connected to the external mounting flange detachably in a covering mode; and the inner side grading shield is connected to the internal mounting flange detachably in a covering mode. Therefore, a high voltage can be guided safely to carry out a high-humidity environment voltage test and corona discharging caused by water drops can be prevented effectively.

The invention discloses a fixed contact structure of a bar-type off-circuit tap-changer. The fixed contact structure comprises an insulating rod and a support rack, wherein the support rack is provided with an operation positioning device; the insulating rod is provided with fixed contacts along the length direction at intervals; each phase of fixed contact is provided with a moving contact assembly; a moving contact in each moving contact assembly is bridged between each phase of adjacent fixed contacts; each fixed contact comprises a columnar fixed contact body and a columnar wiring terminal; each fixed contact body and the corresponding moving contact arranged in a matching manner; the outer end of each fixed contact body is bent downwards to form the wiring terminal; and each moving contact assembly comprises a moving contact bracket and a moving contact arranged in the moving contact bracket. After each wiring terminal is bent downwards, connection with a lead which is from the lower part of the tap-changer is facilitated; and the lead is bent into a curved form, is connected with the fixed contact, and is not arranged in a manner of bending at 90 degrees, so that the bending radius of the lead is reduced; the space in a transformer occupied by the tap-changer is reduced; and the lead is more beautiful in wire arrangement and is not easy to break.

The invention provides a power semiconductor device and a preparation method thereof. The power semiconductor device comprises a first conductive type substrate, first trench gates arranged in the substrate and distributed in a grid shape, island-shaped second trench gate which is positioned in each grid cell enclosed by the first trench gate, a second conduction type well region which is locatedin the substrate and located between the first trench gate and the second trench gate, a first conduction type first source region, a first conduction type second source region and a second conductiontype third source region, wherein the first conduction type first source region, the first conduction type second source region and the second conduction type third source region are located in the well region. The device further comprises an emitting electrode metal layer which is positioned above the substrate and is electrically connected with the first source region, the second source region,the third source region and the second trench gate at the same time. Under the condition that the distribution of electric field lines in the device is not changed, the current density is reduced byincreasing the distance between the effective trench gates. The anti-short-circuit capability of the device is improved. The electric field in the device can be improved, and the voltage endurance capability of the device is improved.

The invention discloses a movable switch knife, relating to the manufacturing technical field of middle-high voltage electrical appliances. The movable switch knife comprises a left movable knife voltage balancing element, a right movable knife voltage balancing element, a left movable knife, a right movable knife, a movable knife supporting element, a movable knife pin, a movable knife connecting lever, a connecting bolt, a fastening nut and a disk spring, wherein the left and right movable knife voltage balancing elements are in hemispherical structures and have a plurality of holes, a plurality of holes in one-to-one correspondence to the left and right movable knife voltage balancing elements are formed in the left movable knife and the right movable knife, the movable knife supporting element is installed between the left movable knife and the right movable knife, and the movable knife connecting lever is used for connecting the left movable knife with the right movable knife through the movable knife pin; and the connecting bolt, the fastening nut and the disk spring are arranged in the left and right movable knife voltage balancing elements. The disk spring is composed of a plurality of pieces; and the left and right movable knife voltage balancing elements are riveted into a whole with the left movable knife and the right movable knife. The movable switch knife can be used for solving the problems of liable insulation flashover, bad insulation strength, poor environmental adaptability and severe partial discharge.

The invention discloses a disk-shaped non-excitation tap switch. The disk-shaped non-excitation tap switch comprises a switch base and a rotary shaft which is arranged on the switch base in a penetration manner, wherein the upper end of the rotary shaft is connected with an operating and positioning apparatus while a moving contact is arranged at lower end of the rotary shaft; static contacts are distributed, corresponding to the circumferential direction of the moving contact, on the switch base at intervals; the non-excitation tap switch is characterized in that each static contact comprises a static contact body and a terminal connected with the corresponding static contact body; the static contact bodies are matched with the moving contact; and the terminals extend out of the switch base and jointly turn to the direction of the branching line from the transformer coil along the circumferential direction of the switch base while the terminals are bent downwardly. The terminals of the static contacts are bent downwards and all face to the lead outlet direction of the transformer, so that the bending radius of the leads can be reduced, the occupied spaces of the tap switch and the lead part in the internal of the transformer can be reduced, the leads can be arranged more attractively, and the usage amount of the leads can be reduced.

The invention relates to a vacuum arc-extinguishing chamber with a composite contact structure. The vacuum arc-extinguishing chamber comprises: a static contact structure which comprises a static main contact, a static arc contact and a static end corrugated pipe, wherein the static arc contact is movably assembled in the static main contact, and the static end corrugated pipe applies an elastic reset acting force to the static arc contact; and a moving contact structure which comprises a moving main contact, a moving arc contact and a moving end corrugated pipe. The moving arc contact is movably assembled in the moving main contact; and the moving end corrugated pipe applies an elastic reset acting force to the moving arc contact to force the moving arc contact to move towards the static arc contact. The static end corrugated pipe and the moving end corrugated pipe are utilized to enable the static arc contact and the moving arc contact to move relative to the corresponding main contacts, and the protruding amount of the two arc contacts relative to the main contacts is offset by the two arc contacts, so compared with a scheme for offsetting only depending on the movement of the static arc contact, the scheme using the two arc contacts to act can effectively reduce the moving distance of the static arc contact, reduce the overtravel condition of the vacuum arc-extinguishing chamber and lower the requirement for the installation place of the vacuum arc-extinguishing chamber.

The invention discloses a solid insulating isolating grounding switch, and relates to the technical field of manufacturing of high and medium voltage electric appliances. The solid insulating isolating grounding switch comprises an insulating shell in which an isolating switch and a grounding switch are arranged, wherein a static terminal part of the isolating switch consists of a bus terminal, an isolating switch insulating cylinder and a conducting terminal; a static terminal part of the grounding switch consists of a conducting terminal, a grounding switch insulating cylinder and a grounding terminal; the static terminal part of the grounding switch and the static terminal part of the isolating switch are provided with a mobile terminal common channel in which a common mobile terminal and an operating mechanism are arranged; and shielding covers are arranged on both sides of the two ends of the isolating switch insulating cylinder and the grounding switch insulating cylinder. According to the solid insulating isolating grounding switch, the problems of large solid insulating switch volume, many assembly steps, high probability of flashover in the switch and serious local discharge can be solved.

The invention discloses an insulation angle ring and a manufacturing method thereof for a transformer winding. The manufacturing method includes folding one side of a small corrugated paper board in 0.5 mm in the size equal to the difference between the height of a winding wire turn and 1-1.5 mm according to the height and the width of the winding wire turn, folding again in the size equal to the width of the winding wire turn, and finally folding third times in the size equal to the height of the winding wire turn to manufacture a U-shaped insulation angle ring. A high-voltage winding end and a wire turn at the tail end are wrapped by several U-shaped insulation angle rings additionally, and the U-shaped insulation angle rings are directly fastened on the inner side or the outer side of the winding wire turn and then sparsely wrap the same. By the insulation angle ring and the manufacturing method thereof, creepage distance between two sides of the wind wire turn is greatly improved by improving small angle rings of the winding wire turn, and operation efficiency is improved.