25results about How to "Reduce partial discharge" patented technology

The invention relates to the technical field of dry-type power transformer manufacturing, in particular to a graded pouring process technology for an epoxy resin coil with filler, which comprises the steps of coil drying, epoxy resin preparation, vacuum pouring, semi-gelling, secondary vacuum pouring, curing and demolding. Drying the coil; preparing epoxy resin; vacuum pouring is conducted, specifically, pouring is conducted when the vacuum degree of a pouring tank reaches 3-4 mbar and the temperature is (Tn-10) DEG C, intermittent stroke pouring is conducted, and the interval time of each stroke is 1.5-2 minutes; and the pouring is paused for 8 minutes after each about 30 minutes of pouring, and then the pouring is paused for 8 minutes after 30 minutes of pouring, so that a traditional vacuum pouring process is improved, and two-stage or multi-stage vacuum pouring and semi-gel procedures are introduced to a high-capacity coil, so that bubble discharge is effectively promoted, filler sedimentation is reduced, shrinkage stress is reduced, and the cracking risk is reduced; and great benefits are provided for improving coil quality and guaranteeing long-term safe operation of the transformer.

The utility model relates to a current transformer which comprises a coil assembly, an epoxy resin casting body, a P1 wiring copper bar and a P2 wiring copper bar, the coil assembly comprises an annular iron core, a coil winding arranged on the annular iron core and a hoisting support, one end of the hoisting support is provided with a supporting piece, the supporting piece is fixed on the coil winding through a ribbon, and the annular iron core is arranged on the annular iron core. One end of the hoisting support is provided with a coil winding, the other end of the hoisting support is provided with a hoisting plate connected with a pouring mold, two hoisting holes are symmetrically formed in the hoisting plate, two copper inserts connected with the pouring mold are arranged at the positions, corresponding to the two hoisting holes, of the hoisting plate, and the coil winding is connected with the P1 wiring copper bar and the P2 wiring copper bar through two primary leads. The coil winding, the annular iron core and the hoisting support are poured into a whole through epoxy resin to form the epoxy resin pouring body. The utility model has the advantages of compact structure, stable and reliable performance, good insulating property, low partial discharge and high production efficiency.

This power conversion unit (U) includes a cooling path (11) positioned between an input-side power converter (14) and an output-side power converter (15) arranged separately on two sides that face each other. The input-side and output-side power converters (14, 15) includes a mold resin (9) filled into a space (p) on the inside of housings (5a, 5b); a switching element (1) covered by the mold resin (9), an upper electrode plate (7) connected to the switching element (1), and a heat dissipation plate (12) having insulating properties connected to the upper electrode plate (7); and a lower electrode (8) provided near the cooling path. The mold resin is an organopolysiloxane having a three-dimensionally crosslinked structure after curing, in which the elastic modulus at room temperature is 0.1 MPa or greater, and the value when the hardness after curing is 10 or greater as measured using a durometer type E.

The utility model relates to a solid-sealed polar pole which comprises an insulating shell, an arc extinguish chamber is arranged in the insulating shell, a guide rod interface is arranged below the arc extinguish chamber, a terminal connecting port is arranged at the upper end of the arc extinguish chamber, a conductive terminal is connected onto the terminal connecting port, and the solid-sealed polar pole further comprises a silicon rubber inner sleeve which is arranged on the inner wall of the arc extinguish chamber in an attached mode. A plurality of convex rings are arranged on the outer ring of the silicone rubber inner sleeve at equal intervals, and grooves embedded with the convex rings are formed in the insulating shell. The convex rings are arranged on the outer ring of the silicone rubber inner sleeve at equal intervals and are precisely embedded into the grooves in the inner wall of the insulating shell, so that the overall structural stability of the solid-sealed polar pole is remarkably enhanced. The design effectively resists displacement caused by external mechanical vibration, thermal expansion and cold contraction and other factors, ensures the sealing integrity of the arc extinguish chamber, avoids pollutant invasion, and prolongs the service life of equipment.

The utility model relates to the field of high-voltage electrical equipment, and provides an isolating contact, which comprises a moving contact, a shielding cover and an insulating cylinder, the shielding cover and the insulating cylinder are sleeved outside the moving contact, a screw rod mechanism is arranged in the moving contact, a conductor with high voltage is connected outside the moving contact, the shielding cover is arranged in the insulating cylinder, and the insulating cylinder is arranged in the insulating cylinder. The shielding case comprises a first shielding case, a second shielding case and a third shielding case which are arranged at intervals; the first shielding case is connected with the conductor in a high-voltage mode, the lead screw mechanism drives the moving contact to move towards or away from the second shielding case and the third shielding case, so that the moving contact is connected with the second shielding case and the third shielding case in a high-voltage mode, the field intensity in the air cavity is effectively reduced, partial discharge is reduced, and the compression strength is improved. The gap between the second shielding cover and the first shielding cover and the gap between the second shielding cover and the third shielding cover form a shielding fracture, the function of circuit breaking is achieved, and the electric field can be effectively shielded by setting the reasonable fracture length.

The utility model provides a dielectric barrier discharge device and air treatment equipment, and relates to the technical field of air purification. The dielectric barrier discharge device comprises a dielectric barrier discharge assembly, the dielectric barrier discharge assembly comprises a first electrode, a second electrode and a barrier medium separating the first electrode from the second electrode, the barrier medium is cylindrical, the internal space of the barrier medium forms a discharge space, the first electrode is an internal electrode, the second electrode is an external electrode, the first electrode is arranged to be an electrode beam, and the second electrode is arranged to be an external electrode; the electrode beam comprises a plurality of electrode wires arranged side by side; and the power supply module is electrically connected with the first electrode and the second electrode and is arranged to load voltage to the first electrode and the second electrode, so that the dielectric barrier discharge component generates dielectric barrier discharge in the discharge space. According to the scheme, the internal electrodes are arranged into the electrode beams, so that the abnormal sound degree of the dielectric barrier discharge device can be reduced, and the problem of low plasma yield cannot be caused.

The utility model relates to the technical field of conducting rods, and discloses an outdoor high-voltage vacuum circuit breaker conducting rod, which comprises a rod body fixedly arranged in an outdoor high-voltage vacuum circuit breaker, and is characterized in that the rod body comprises a first rod piece, one end of the first rod piece is fixedly provided with a first external thread for installation, and the other end of the first rod piece is provided with a second external thread for installation; a second rod piece is fixedly connected to the other end of the first rod piece, second external threads are fixedly arranged on the second rod piece, and a third rod piece used for installation is fixedly arranged at one end of the second rod piece. According to the outdoor high-voltage vacuum circuit breaker conducting rod, the outer side of the conducting rod is provided with a plurality of external thread structures which are used for being connected and installed in the outdoor high-voltage vacuum circuit breaker, the actual installation process is simple in operation, the locking effect is good, the overall structure is smooth, production simplification is facilitated, and production efficiency is improved; and the traditional notch design on the conducting rod is eliminated, so that the processing difficulty is simplified, burrs on the conducting rod are avoided, the use safety of the conducting rod is improved, and the partial discharge problem of conduction is reduced.

The utility model belongs to the technical field of high voltage measuring devices, and discloses a resistance-capacitance voltage divider and an electronic voltage transformer, the resistance-capacitance voltage divider comprises an insulation support cylinder, a resistance-capacitance voltage dividing plate is arranged in the insulation support cylinder, the resistance-capacitance voltage dividing plate comprises a PCB circuit board, a plurality of passive element modules are fixed on the PCB circuit board, and the passive element modules are fixed on the insulation support cylinder. The passive element module is covered with a resistance welding spot shielding block, the top of the insulating supporting cylinder is provided with a high-voltage end wiring terminal, the bottom of the insulating supporting cylinder is provided with a base with a through hole, one end of the passive element module is electrically connected with the high-voltage end wiring terminal, and the other end of the passive element module is electrically connected with a coaxial cable signal wire penetrating out of the base; arc-shaped notches are formed in the two sides of the PCB. According to the utility model, the resistance welding spot shielding block is arranged on the resistance-capacitance voltage-dividing plate, so that the partial discharge of the high-voltage arm is reduced, the stability is improved, and the used space is reduced by arranging the resistance-capacitance voltage-dividing plate in the insulating support cylinder.

The present invention belongs to the technical field of automatic pressure gel voltage transformer, and particularly relates to a body coil structure and manufacturing method suitable for automatic pressure gel voltage transformer. The structure includes an iron core and a secondary coil and a primary coil wound on the iron core from the inside to the outside. A skeleton is provided on the outside of the core column of the iron core, and the secondary coil is wound on the skeleton. The two sides of the secondary coil and the iron core are sealed by sealant. A main insulating layer is provided between the secondary coil and the primary coil. A high-voltage shielding layer is provided on the outside of the primary coil. The high-voltage shielding layer is located on both sides of the inner cavity of the iron core and has multiple through holes. The outside of the iron core is wrapped with an insulating buffer layer and a low-voltage shielding layer. The present invention avoids the iron core from entering the resin, is conducive to the discharge of pressure injection gas, and the product has a small partial discharge, thereby ensuring the safe operation of the product, and providing a favorable guarantee for the batch manufacturing and quality control of voltage transformers.

The utility model discloses a shielding assembly of a voltage transformer, which belongs to the technical field of voltage transformers, and comprises a first shielding net and a second shielding net which are embedded in epoxy resin, the first shielding net comprises a first main body with an annular structure, an installation terminal is arranged outside the first main body, and the installation terminal is connected with the first main body through a connecting rod; a first mounting insert for fixing a primary terminal of the voltage transformer is arranged in the mounting terminal; the second shielding net comprises a cylindrical second main body, and a second mounting insert is arranged at one end of the second main body; wherein the first main body is sleeved on the outer side of the second main body. Through the arrangement of the shielding assembly, the problems that in the working process of the voltage transformer, a relatively obvious discharge phenomenon is generated due to non-uniform field intensity among the primary terminal, the resin and the mounting insert, so that the partial discharge of a product is relatively large for a long time, the dielectric insulation strength is influenced, the dielectric breakdown is caused, and the service life of the product is prolonged are solved. And the voltage transformer and related equipment are damaged.

The low-loss flow guide cylinder is provided with the flow guide cylinder, the flow guide space is arranged in the flow guide cylinder, the assembly part is arranged on one side of the flow guide cylinder, the assembly part is an assembly flange, and bolts for assembly are arranged on the assembly flange, so that the risks of partial discharge and insulation breakdown caused by non-uniform electric fields are reduced, and the reliability of the flow guide cylinder is improved. When the electrical components need to be arranged, the electrical components can be arranged in the flow guide space, the middle flow guide valve block is arranged in the flow guide space, and different electrical components are separated by the middle flow guide valve block, so that the electric field released by the electrical components is more uniform, and the problem of non-uniform distribution of the electric field is avoided.

The utility model discloses a kind of feeding mechanism for full-automatic tab forming machine in the field of tab forming machine, including tab forming machine body;Tab forming machine body left side is set reciprocating type distributing mechanism and adjustable static elimination mechanism;Driving motor makes driving gear through front and back transmission gear and half gear, transmission toothed plate and transmission rod transmission to reciprocating push limit baffle and cooperate with buffer rubber pad to stop piece material;Adjustable static ion wind bar can be adjusted in height by pitch screw rod and be limited by limit rail, and this feeding mechanism for full-automatic tab forming machine works cooperatively by reciprocating type distributing mechanism and adjustable static elimination mechanism, prevents piece material stacking and static electricity generated by friction by physical distribution and adjustable static neutralization double means, and real-time eliminates residual static electricity, to significantly improve feeding stability, reduce failure rate and improve the continuous automatic processing capacity of forming process and product qualification rate.

The utility model discloses a winding wire welding fixing equipment for transformer, including operation platform base and with its connection's welding fixed component, welding fixed component, including the support of welding in operation platform base on the up, the fixed platform of operation platform base front end forward extension, the light hole of support installs the screw rod with rotary handle, the outer wall of telescopic link is welded below the support, the telescopic pressure rod is covered in telescopic link outer wall, the lower end of telescopic pressure rod is welded the pressure plate, and the pressure plate corresponds with fixed platform upside and down, and the welding piece is clamped, and telescopic pressure rod is connected with screw rod. This design mainly applies the welding fixing of the winding of transformer. The utility model discloses the beneficial effect is, through the practice proves, the use of winding wire welding fixing equipment for transformer can realize the welding fixing of various specifications of wire, avoids the welding shake, misplacement and other problems of the manual holding fixed wire of previous manual holding fixed wire, guarantees the butt joint of wire flush, stable.

The application relates to the technical field of solid insulation ring network cabinets, in particular to a solid insulation ring network cabinet, which comprises a cabinet body, the inner part of the cabinet body is respectively provided with a phase unit module, an operating mechanism module and an insulation support module, the phase unit module, the operating mechanism module and the insulation support module are mutually independent modules, and the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring; the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring, so that the solid insulation ring network cabinet is compact in structure after being assembled and formed, space is saved, the cabinet body width can be reduced from the traditional 500 mm to about 350 mm, space is saved and the transformation cost is reduced, meanwhile, the situation that a whole pouring cabinet is scrapped due to local problems is avoided, and the operation and maintenance cost and the whole life cycle cost are greatly reduced.

The utility model relates to power equipment technical field, concretely relates to a kind of anti-flashover insulator, including insulator body, insulator body is composed of outer insulating sleeve and the core rod of being arranged in outer insulating sleeve, the inside of core rod is provided with metal shielding strip along the core rod height direction setting, umbrella skirt is integrally formed on the outer surface of outer insulating sleeve, umbrella skirt is alternately arranged and is composed of multiple big umbrella skirts and multiple small umbrella skirts, the top surface of big umbrella skirt and small umbrella skirt is all provided with second slope, the surface of second slope is provided with super-hydrophobic coating, the edge portion of big umbrella skirt and small umbrella skirt is provided with multiple ring-like equidistant arrangement tooth tip, recess is arranged between two tooth tips adjacent to each other.The utility model has good anti-flashover protection effect, and it is beneficial to the stable operation of system.

The invention relates to the technical field of mutual inductor manufacturing equipment, and particularly discloses mutual inductor machining castable conveying and pouring equipment which comprises an outer pipe, a connecting ring is fixedly installed on the outer surface of the middle of the outer pipe, an inner pipe is arranged in the outer pipe, and the bottom of the inner pipe is in a closed state; and material conveying grooves are formed in the outer surface of the inner pipe in a penetrating mode, the three material conveying grooves are formed around the center axis of the inner pipe at fixed intervals, and a top cover is fixedly connected to the top of the inner pipe. By arranging the inserting pipe and the inserting rod which are matched with the inner pipe, the effect of pressurizing and shunting the castable is achieved, and pressurizing and shunting are beneficial to reducing bubbles and gaps in the castable, so that the insulating property of the poured mutual inductor is improved, and the possibility of partial discharge is reduced; and the castable can better permeate into a small gap between the winding and the iron core, so that the mechanical strength of the whole structure is enhanced, and the durability and reliability of the mutual inductor are improved.

The utility model discloses a grounding type voltage transformer with a fuse, and relates to the technical field of high-voltage measurement or relay protection equipment of an electric power system. Comprising a voltage transformer body arranged in a main insulator, the voltage transformer body comprises a primary winding, a secondary winding and an iron core, the secondary winding and the primary winding are concentrically wound on the iron core from inside to outside, the primary winding is formed by arranging a plurality of enameled round copper wires in parallel into a strand and winding the strand in a pagoda mode from inside to outside in a grading mode, and the secondary winding is wound on the iron core. Insulation paper is arranged between every two adjacent layers of enamelled round copper wires, a layer of primary high-voltage electrostatic screen is wound on the outer side of each level and is separated from the enamelled round copper wires by the insulation paper, and the width of the primary high-voltage electrostatic screen is larger than that of the insulation paper between the corresponding levels; a primary insulating cylinder is arranged at the top of the transformer body, the fuse is sealed in the primary insulating cylinder by adopting a sealing head bolt and a silica gel pad, and a primary high-voltage terminal is arranged on the primary insulating cylinder. The device is smaller in occupied space, simple in maintenance, uniform in internal and external electric fields, small in partial discharge amount and safe and reliable in operation.

The purpose of the present disclosure is to provide a high-voltage insulating structure capable of reducing an electric field around a conductor to which a high voltage is applied. In this high-voltage insulating structure, an electrically conductive part, to which a high voltage is applied and which extends in an axial direction, is surrounded by an insulator, wherein the insulator comprises a first insulator 105, a second insulator 203 positioned on the opposite side from the first insulator in the axial direction, and a third insulator 205 positioned between the first and second insulators. The electrical resistivity of the third insulator 205 is smaller than the electrical resistivities of the first and second insulators. As for the thickness of the third insulator 205 in the axial direction, a first thickness at the outer side farther from the electrically conductive part is less than a second thickness at the inner side closer to the electrically conductive part.

The invention discloses a C-type head three-phase voltage transformer assembly method, which comprises: fixing the coil body after vacuum drying in a casting mold, then installing three corresponding low-voltage shielding nets A, B, and C, connecting the primary winding to the fuse shielding net through a primary lead terminal insert; connecting the secondary terminal and the secondary winding and fixing them through a secondary cover plate of the mold, adjusting the insulation distance between the low-voltage shielding net and the fuse shielding net, and using epoxy resin vacuum casting and curing to form an insulator, wherein three primary insulating columns at equal vertical distances on the upper part of the insulator are truncated cone terminals of the same shape; and spraying a layer of metal conductive paint on the lower and middle surfaces of the insulator after uniform sandblasting, wherein the metal conductive paint is connected to the ground terminal. The method does not need to specially install other numerous electrical accessories, saves time and labor, and avoids the occurrence of ferromagnetic resonance failure of the voltage transformer from the assembly method.

The invention discloses a design method and system of a basin-type insulator particle catcher and a medium, relates to the technical field of high-voltage equipment manufacturing, and aims to improve the insulation reliability of a direct-current GIL power transmission system and guarantee safe and stable operation of a power transmission line in a special environment. Metal particles generated in the production, transportation, assembly and operation processes of the GIL may damage the insulation performance of equipment and cause discharge accidents. Through collaborative optimization of geometric structures of the basin-type insulator and the particle catcher, electric field distribution is changed, the influence of metal particles on the insulation performance is reduced, the probability of partial discharge and surface flashover is reduced, and the safety and reliability of equipment operation are guaranteed.

The present invention belongs to the technical field of voltage transformers, and particularly relates to a method for manufacturing a voltage transformer. The method comprises the following steps: step S1: manufacturing a mold; step S2: manufacturing a voltage transformer coil body; step S3: vacuum drying the voltage transformer coil body and preheating it, and then heating the mold with the voltage transformer coil body to a constant temperature after molding; step S4: evacuating the inner cavity of the mold and filling it with SF6 gas, and then depressurizing it to normal pressure, so that the inner cavity of the mold is completely in an insulating gas environment; step S5: injecting epoxy resin mixture into the inner cavity of the mold under pressure; step S6: curing the heat-insulating gel; step S7: demoulding, and then curing; step S8: assembling. The present invention has a simple process, convenient operation, short gel curing time, shortened production cycle, small mixture viscosity, stable gel time and glass transition temperature, high mechanical and electrical strength of the product, and small partial discharge.

The present invention relates to the field of automatic pressure gel technology, and in particular to an automatic pressure gel injection process and mold for a voltage transformer. The process includes step S1: using a static mixing device to prepare an epoxy resin mixture; step S2: installing a mold on the coil of the voltage transformer body, heating the mold to a set temperature and maintaining a constant temperature; step S3: first evacuating the mold, then filling it with SF6 gas, and then depressurizing it to normal pressure, so that the mold is in an SF6 gas insulation environment; step S4: automatically injecting the epoxy resin mixture into the mold through an automatic pressure gel device, the injection pressure is 0.10-0.15MPa, the initial injection speed is controlled at 1-2kg per minute, and when the injection weight exceeds 6kg, the total filling time is controlled at 10-12min; step S5: controlling the curing of the epoxy resin mixture gel through a mold constant temperature automatic control system; step S6: demoulding and taking out the injection body, and continuing the post-curing. The present invention is simple in scheme, easy to operate, short in gel curing time, shortens the production cycle, has high mechanical and electrical strength, and small in partial discharge.

The utility model belongs to the technical field of mutual inductor, disclose a kind of high safety's fuse and voltage transformer.The fuse includes main spare, spare and rotary switch;The rotary switch is electrically connected with line primary high voltage end, including conducting position and several insulation positions;The main spare and the spare are electrically connected with the different working positions in the rotary switch respectively;The main spare and the spare all include first high voltage shield, second high voltage shield, insulating cylinder and fuse main body;The insulating cylinder gap is worn in the first high voltage shield, one end of the fuse main body gap is worn in the second high voltage shield, the other end is adapted and worn in the insulating cylinder;Wherein, the outside wall of the insulating cylinder is conductive structure, and the inside wall is insulating structure.The utility model has more excellent current protection effect.

The present application provides a kind of integrated residual detection and ignition point prediction mineral oil transformer low carbonization intelligent reconstruction method and system, method includes: construction low carbonization refill process system, replace the mineral oil in transformer with natural ester insulating oil;The residual proportion of mineral oil in mixed insulating liquid sample is quantitatively detected, and the residual detection result is obtained;In the depth filling stage of low carbonization refill process, a predetermined proportion of nano additive is added to the natural ester insulating oil, and a performance optimization scheme is constructed;The residual detection result and the nano additive concentration in the performance optimization scheme are input into the pre-trained model, the predicted ignition point of the current mixed insulating liquid is calculated and output in real time, and safety warning is carried out based on the predicted ignition point.The technical scheme of the present application not only directly solves the single bottleneck of performance optimization, but also indirectly strengthens the effect of residual control and safety monitoring, to ensure the high reliable operation of the transformer after reconstruction under the premise of low carbon emission.

The utility model provides a bar-shaped off-circuit tap-changer with a shielding case, which comprises an operating mechanism, a moving contact group, a support plate, a support seat, a transmission mechanism, a static contact group and an insulating plate, the operating mechanism is fixed at the top of a transformer box cover, the bottom of the operating mechanism penetrates through the transformer box cover to be connected with one end of a coupler, and the other end of the coupler is connected with the transmission mechanism. The transmission mechanism is arranged on the supporting seat and is in configuration connection with the supporting plate, the moving contact groups are arranged on the supporting plate at intervals, the static contact groups are arranged on the insulating plate at intervals, the insulating plate is fixedly arranged on the transformer box cover through the fixing plate, the insulating plate is connected with the supporting seat, and the shielding covers symmetrically cover the outer sides of working areas where the static contact groups are in contact with the moving contact groups. According to the utility model, the electrodes of various shapes of the moving contact group are isolated in the shielding cover, so that the insulation performance of the tap switch on a transformer coil and a box body is enhanced, and meanwhile, the volume of a transformer is reduced.