3789results about "Transformers/inductances casings" patented technology

The invention discloses a dry-type transformer. The dry-type transformer comprises a transformer body, a housing, a bottom plate and a fan, wherein the transformer body is formed by a plurality of groups of encapsulated windings in an array mode, a supporting rod is arranged at the bottom of the transformer body and allow the encapsulated windings in each group to connect with each other, the supporting rod is arranged in a crossed mode, and first threaded holes penetrate the supporting rod; the transformer body is integrally arranged in the cavity of the housing, and the bottom of the transformer body is fixedly positioned with the bottom plate, and meanwhile, the transformer body is arranged in the housing through the fan, the whole device achieves dispelling the heat in the transformerbody, and the graphite material of housing side is protruding simultaneously, and the heat from the housing is diffused quickly, and the protrusion of the array distribution can reduce the air great dust entering the inner wall of the housing through air vents.

The invention relates to the technical field of dustproof protection, and discloses an electronic transformer dustproof protection mechanism and a protection mechanism, the inner wall of the protection mechanism is fixedly provided with a dustproof assembly, and the inner wall of the protection mechanism is provided with an air suction assembly. The cooling fan is started to suck external air flow into the flow guide frame, the flowing speed of sand and dust in the air flow is reduced through the inclined panel, the motor is started to drive the rotating frame to rotate, the flowing speed of the air flow is reduced, the sand and dust with large air flow are settled, the sand and dust are pushed to fall into the arc-shaped dust discharging block in cooperation with frequent stretching-out of the inclined face ring, and the sand and dust are discharged through the arc-shaped dust discharging block. And finally, fine dust moving along with the air flow is filtered through a filter screen, the air flow dissipates heat of the electronic transformer, the air flow after heat dissipation flows out of an exhaust plate, through the application of the structure, the dust and the cooling air flow can be fully separated, and the dust is effectively prevented from directly making contact with the electronic transformer and polluting the electronic transformer.

The invention discloses a high-safety station explosion-proof transformer and a using method, and relates to the technical field of transformers. The explosion-proof transformer comprises a transformer body arranged in an explosion-proof shell, a plurality of cooling fins are arranged on the side portion of the transformer body, the explosion-proof transformer further comprises a pressure relief unit, the pressure relief unit comprises a plurality of pressure relief boxes arranged in the explosion-proof shell, and a pressure relief assembly is arranged in each pressure relief box; a pressure monitoring sensor for monitoring and releasing the internal pressure of the transformer main body is arranged in the pressure relief assembly, and an adjusting assembly and a heat dissipation assembly are arranged on each pressure relief box. The transformer has the advantages that multi-point pressure monitoring can be carried out on the interior of the transformer body, whether high voltage occurs in the transformer body or not is monitored in real time, targeted pressure relief and explosion prevention can be carried out on a high-voltage part after the high voltage is monitored, the heat dissipation range and the heat dissipation efficiency can be improved in a targeted mode according to the pressure relief condition, and the heat dissipation efficiency is improved. Synchronous explosion-proof treatment of the inside and the outside is realized, and the explosion-proof safety is higher.

The invention discloses a transformer explosion-proof protection device suitable for an extreme environment, and belongs to the field of oil-immersed transformers, the transformer explosion-proof protection device comprises a mounting rack, the upper surface of the mounting rack is fixedly connected with a transformer body, and the front side and the rear side of the upper surface of the transformer body are provided with a second binding post and a first binding post respectively; the front side and the rear side of the transformer body are fixedly connected with cooling fins. When the pressure in the transformer body reaches a certain threshold value, the piston pushes the sealing cover to move upwards, the sealing cover is arranged, the situation that the activated carbon plate is exposed in the natural environment for a long time, a large amount of dust and impurities are attached to the surface of the activated carbon plate, and consequently the activated carbon plate is blocked is avoided, and meanwhile the activated carbon is prevented from losing efficacy due to excessive dust adsorption; the efficiency of absorbing hydrogen and methane is reduced, purification and absorption are carried out through the activated carbon plate, hydrogen and methane in the gas are absorbed, pollution-free emission is carried out, and the influence of hydrogen and methane on the surrounding environment is avoided.

The invention discloses an ultra-thin high-energy-storage-density inductor which comprises a shell, a cover plate arranged on the upper portion of the shell, cooling fins fixedly installed in the cover plate, an inductor body arranged in the shell, a shell cover fixedly connected to the bottom of the cover plate and a connecting assembly arranged on one side of the shell. The connecting assembly comprises a dismounting and mounting mechanism arranged on the upper portion of the shell, a heat dissipation mechanism is arranged on the side portion of the shell, a damping mechanism is arranged in the shell, the top of a positioning block is fixedly connected with a cover plate, a clamping rod movably penetrates through a movable groove to be clamped with a clamping groove, one end of a second spring is fixedly connected with a movable block, and the other end of the second spring is fixedly connected with a clamping groove. The outer end of the connecting rod is movably connected with the shell. The problems that a top cover of an existing device is inconvenient to disassemble manually, so that the interior of an inductor is inconvenient to overhaul and locate manually, and subsequent use of the device is affected are solved.

The utility model discloses a current transformer, which relates to the technical field of current measurement, and comprises a current transformer body, the upper surface of the current transformer body is fixedly connected with two connecting pieces, one side of the current transformer body is provided with an adjusting structure, and the adjusting structure comprises a long rod. One end of the long rod is fixedly connected with the current transformer body, the arc surface of the long rod is slidably connected with a long pipe, the arc surface of the long pipe is rotatably connected with a screw rod, the arc surface of the screw rod is in threaded connection with a connecting plate, the lower surface of the connecting plate is fixedly connected with an adjusting rod, and the lower end of the adjusting rod is fixedly connected with a limiting plate. According to the current transformer, the effect that the current transformer body can flexibly move forwards, backwards, leftwards and rightwards within a certain range of a distribution box is achieved, and the problem that the current transformer body is relatively fixed after being installed, so that holes need to be formed again for installation after the line layout in the distribution box is changed, and the overall complexity degree is improved is solved.

The invention belongs to the technical field of transformer heat dissipation, and particularly relates to a transformer finned radiator convenient to maintain, which comprises an oil tank, a shell, an electric turntable and the like, a wind direction sensor is arranged on the oil tank; an oil tank is fixedly connected inside the shell; a chamber is arranged between the shell and the oil tank; the chassis is fixedly connected with an electric turntable, and a rotating part of the electric turntable is fixedly connected with the shell; a plurality of air inlets are formed in the surface of the shell, and air outlets opposite to the air inlets are formed in the surface of the shell; a plurality of cooling fins are fixedly connected to each side of the oil tank, cavities are formed in the cooling fins, and the cooling fins penetrate through the shell; a plurality of ventilation holes are formed in the portion, located in the cavity, of the cooling fin. The heat dissipation device has the advantages that in the heat dissipation process, the electric rotating disc drives the oil tank and the shell to rotate, external air is introduced into the cavity and flows in the cavity, cooling oil and cooling fins in the oil tank are subjected to primary heat dissipation, and the heat dissipation effect is improved.

The invention discloses an inductor heat dissipation installation structure, an integrated heat dissipation inductor structure and a converter, and the structure comprises a liquid cooling radiator which is internally provided with a first liquid cooling flow channel, is suitable for the circulation of a cooling liquid, and is provided with a heat dissipation surface; the liquid cooling radiator is provided with a first interface and a second interface which are communicated with the inlet end and the outlet end of the first liquid cooling flow channel; the inductor shell is defined by the side plates in the circumferential direction and located on the heat dissipation face so as to be matched with the liquid cooling radiator to form a containing cavity suitable for containing the inductor body; a second liquid cooling flow channel is arranged in a side plate of the inductor shell and is suitable for circulating cooling liquid, and a third interface and a fourth interface which are used for forming an inlet end and an outlet end of the second liquid cooling flow channel are formed in the side plate; at least part of the bottom surface of the accommodating cavity is a heat dissipation surface; the first connector communicates with the third connector, and the second connector communicates with the fourth connector. By adopting the inductor heat dissipation mounting structure, the heat dissipation effect of the inductor can be improved.

The invention discloses a transformer with a noise reduction function, and relates to the technical field of transformers, the transformer comprises a shell, an air outlet and an air inlet of the shell are formed in the upper side and the lower side respectively, a connecting shell is fixedly connected to the top of the shell, and a plurality of transformer bodies are arranged in the shell; a radiator used for radiating heat of the transformer body is arranged in the shell, air cylinders symmetrically distributed along the shell are fixedly connected into the shell, and a fixing frame is fixedly connected to the side, close to an air outlet, of the interior of the shell. The multiple first sound absorption plates distributed in the N shape are arranged close to the air outlet, a complex labyrinth type airflow channel is formed, sound waves need to be reflected and refracted multiple times in the transmission process, part of sound wave energy can be consumed in each reflection, meanwhile, noise can be prevented from being transmitted out from hinge shaft seams of the first rotating plates through the noise reduction pads, and therefore the noise reduction effect is improved. The leakage of most noise is blocked, so that the effect of attenuating the noise is achieved.

The invention relates to the technical field of transformers, in particular to an oil-immersed power transformer which comprises a hollow rod, a first round rod, a first piston, a first spring, a cylinder, a second round rod, a second piston, a limiting block and a ventilation assembly. A hollow rod is fixedly connected to the diaphragm; a first round rod is slidably connected to the hollow rod. A first piston is fixedly connected to the first round rod and makes contact with the lower end of the hollow rod. A cylinder is fixedly connected to the box body; through cooperation of the hollow rod, the first round rod, the first piston, the first spring, the cylinder, the second round rod, the second piston, the second spring and the limiting block, pressure relief operation can be automatically completed when pressure in the transformer body is increased abnormally, and therefore the transformer body can be protected; and the transformer oil sprayed out at a high speed can be intercepted and prevented from being sprayed to the outside to pollute the environment, the intercepted transformer oil is gathered on the upper side of the diaphragm, manual collection of the transformer oil can be facilitated, and waste is avoided.

The invention discloses a low-loss double-reverse-star rectifier transformer for a hydrogen production system, and relates to the technical field of double-reverse-star rectifier transformers, the low-loss double-reverse-star rectifier transformer comprises a box body, cooling fins, a coil, a connector lug, a supporting box and a cooling module, the cooling fins are installed on the outer wall of the box body, the coil is installed on the inner wall of the box body, the connector lug penetrates through the top of the box body, and the supporting box is arranged in the box body. One end of the connector lug is connected with the outer wall of the coil, and a supporting box is installed on the outer wall of the box body. The oil pump is started to suck transformer oil in the box body into the continuous bow-shaped pipe, at the moment, the first fan is started to generate wind power to blow to the surface of the continuous bow-shaped pipe, so that the transformer oil in the continuous bow-shaped pipe is cooled, and the cooled transformer oil enters the box body again through the discharge head; at the moment, a first motor rotates to drive a first beating head to rotate, the first beating head rotates to drive a T-shaped frame to move, the T-shaped frame moves to drive a first spring to move, and the first spring moves to enable the T-shaped frame to drive a ram to move.

The invention relates to the technical field of transformers, and discloses a transformer with dustproof and moistureproof functions. Comprising a rotary dust removal mechanism, a variable-frequency heating and dehumidifying mechanism, an induction coil which is fixedly mounted in a second gas flowing cylinder and cooperates with a high-frequency current generator to generate an alternating magnetic field phenomenon, and a metal rod which is mounted in the center of the induction coil and generates a heating phenomenon after being influenced by the alternating magnetic field. According to the transformer with the dust-proof and moisture-proof functions, the dust-proof effect can be achieved on gas entering the transformer protection cabinet, the filter cover used for dust removal rotates at a high speed, the gas attached to the outer surface of the filter cover can be thrown away by centrifugal force, and therefore the normal working time efficiency of the filter cover is guaranteed; the device can perform a heating dehumidification effect on dedusted gas, so that humid gas is prevented from entering a transformer protection cabinet, the working environment of a transformer is improved, and the effective service life of the transformer is prolonged.

The invention relates to the technical field of transformer heat dissipation, in particular to an oil cooling radiator for a transformer, which comprises a shell, an oil conservator, a telescopic driving piece, cooling fins and the like, electrical elements are arranged in the shell; an oil conservator used for stabilizing the oil pressure in the shell is arranged on the shell; the oil conservator is communicated with the interior of the shell; a plurality of telescopic driving pieces are arranged on the shell; the telescopic ends of every two telescopic driving pieces which are opposite in the front-back direction are jointly and fixedly connected with a plurality of cooling fins used for conducting heat dissipation on insulating oil. The cooling fins are made of heat conduction materials. And each radiating fin is of a hollow structure. The oil leakage part of the welding seam of the cooling fin is blocked through the rubber scraping strip and the blocking plate, insulating oil is prevented from continuously leaking, the insulation performance of electrical components in the transformer is prevented from being reduced, faults such as short circuit and discharge caused by insufficient insulation strength are reduced, and meanwhile it is avoided that follow-up maintenance work is affected by insulating oil leakage.

The utility model discloses a dry type three-dimensional roll iron core transformer, including transformer body, shell and radiating fin, transformer body is fixedly connected in the interior of shell, shell is triangular setting, radiating fin all is provided on the triangular face of shell, the inner side of radiating fin is fixedly connected with slider, and the slider is fixed in the shell. The two sliding blocks are symmetrically arranged about the central axis of the cooling fin, and sliding grooves used in cooperation with the sliding blocks are formed in the surface of the shell. According to the utility model, by arranging the modularized radiating fins, the radiating fins can be singly replaced, so that the replacement cost of the radiating fins is reduced, and the problems that in the actual use process, the equipment adopts an integrated structure of the shell and the radiating fins, when an operator needs to replace the radiating fins, the whole shell needs to be replaced, and the replacement cost is reduced are solved. And the radiating fins on one side cannot be replaced independently, so that the later maintenance cost is increased.

The invention discloses a hybrid heat dissipation type power transformer, and relates to the technical field of power transformers. The dry-type transformer comprises a mounting box, a dry-type transformer body and a mixed heat dissipation system. A cooling fan and an air outlet barrel are arranged at the rear end of the mounting box, a fan rotating shaft is connected with a self-cleaning filter barrel cover, vibration dust removal of the filter barrel cover is achieved through cooperation of a spring, a brush plate and a knocking spherical surface, and dust enters a detachable collecting box through a collecting opening. Profiling cooling fins are arranged in the mounting box and tightly attached to the transformer body, liquid cooling heat dissipation is carried out on the outer portion of the mounting box through a C-shaped cooling fin assembly, and cooling liquid is circularly cooled through the cooling box. The box door is provided with a dustproof air inlet and a rain shielding structure. By combining the air cooling and liquid cooling dual heat dissipation modes, the rotating shaft drives the brush plate to be matched with the filter cartridge cover supported by the spring, dust on the filter screen is automatically cleaned, blockage is avoided, continuous and efficient work of the heat dissipation fan is guaranteed, the internal temperature of the transformer is effectively reduced, equipment damage caused by heat accumulation is avoided, and the service life is remarkably prolonged.

The invention relates to the technical field of micro-nano motors, in particular to a preparation method and application of a micro-nano motor for improving oil reservoir exploitation. Due to the wheel shape of the micro-nano motor and the hydrophobic modification effect, the micro-nano motor can move in a high-viscosity oil reservoir environment in oil reservoir exploitation. Under the action of a magnetic field, the micro-nano motor can controllably move in a complex three-dimensional core environment, and the size of the micro-nano motor can be reduced when the micro-nano motor encounters a narrower pore throat, so that the micro-nano motor can smoothly pass through the pore throat. When the micro-nano motor makes contact with crude oil drops, the micro-nano motor can carry the oil drops to move and carry the oil drops to a high-permeability area of the oil reservoir, and the motor carrying the oil drops is extracted to the ground along with displacement fluid, so that the recovery rate of the oil reservoir is increased. Meanwhile, the micro-nano motor can be recycled for multiple times.

The utility model belongs to the technical field of electromagnet coils, particularly relates to a magnetic suspension electromagnet coil, and aims to solve the problems that a coil with a large number of turns can generate a strong magnetic field under the same current, so that the coil with a large number of turns can be adopted to generate a strong and stable magnetic field, but the large number of turns can cause some problems. In order to solve the problems that the energy loss is further increased and even the coil is possibly damaged due to the fact that the resistance of the coil is increased and heating is increased, the utility model provides the following scheme: the coil comprises a hollow framework, a plurality of turns of coils are wound on the hollow framework, and a protective sleeve is wound on the whole outer wall of the plurality of turns of coils; and the outer wall of a single copper wire of the multi-turn coil is covered and sprayed with an insulating layer. When the magnetic suspension electromagnet coil is used, through the design of the protective sleeve, the ceramic insulating coating, the heat dissipation fins, the heat extraction fan, the heat dissipation holes and the like which are made of polyimide film materials, the heat dissipation efficiency and durability of the coil are effectively improved, and stable operation of a magnetic suspension electromagnet is ensured.

The invention relates to the technical field of oil-immersed power transformers, in particular to an oil-immersed power transformer which comprises an oil-immersed power transformer body, a transformer oil conservator is fixedly mounted on the oil-immersed power transformer body, and a fixing frame is fixedly connected to the transformer oil conservator. The sunshade curtains are fixedly connected to the two sides of one end of the fixing frame, the transmission mechanism is fixedly connected to the fixing frame, the curtain pulling frame is arranged on the fixing frame in a sliding fit mode, the oil conservator cleaning mechanism is arranged at the bottom end of the middle of the curtain pulling frame in a sliding fit mode, and the air guide mechanisms are fixedly connected to the fixing frame. The curtain pulling frame is driven by the transmission mechanism to move, so that the sunshade curtain can be unfolded to block above the transformer oil conservator, and sunshade protection is performed on the transformer oil conservator. Direct irradiation of the sun to the oil conservator can be effectively shielded, sunlight radiation heat transfer is reduced, the temperature of the oil conservator is prevented from being too high, and then the temperature of oil in the transformer is effectively reduced.

The invention relates to the field of transformers, in particular to an oil-immersed transformer which comprises a shell, a transformer core is installed in the middle of the interior of the shell, first heat dissipation fins which are evenly distributed are arranged on the two sides of the shell correspondingly, cross rods are fixedly connected to the upper portions and the lower portions of the first heat dissipation fins correspondingly, and sliding rods are slidably connected to the interiors of the cross rods correspondingly; the middles of the sliding rods are provided with guide grooves, the two ends of each sliding rod are provided with balancing weights, the middles of the first cooling fins are provided with openings, the middles of the openings are rotationally connected with rotating shafts, one sides of the middles of the rotating shafts are fixedly connected with rotating plates, and the upper portions and the lower portions of the peripheries of the rotating shafts are provided with tooth grooves. According to the invention, the problems that the heat dissipation of the internal and external insulating oil is not uniform when the traditional insulating oil stands, and the internal high-temperature insulating oil can continuously cause negative effects on the heat dissipation process are solved.

The invention belongs to the technical field of transformers, and discloses an explosion-proof sealed oil-immersed transformer which comprises an oil-immersed transformer body, a mounting frame is fixedly mounted at the top of the oil-immersed transformer body, an oil conservator is fixedly mounted on the mounting frame, the bottom of the oil conservator communicates with an explosion-proof oil pipe, and the explosion-proof oil pipe communicates with an oil storage tank. The explosion-proof oil pipe penetrates through and extends into the oil-immersed transformer main body, an oil pump is arranged on the explosion-proof oil pipe, an automatic pressure relief mechanism is arranged on the oil-immersed transformer main body, and the automatic pressure relief mechanism comprises a pressure relief valve cylinder. According to the scheme, through a spring-sealing plug linkage structure in the automatic pressure relief mechanism, when the internal pressure exceeds a threshold value, a sealing plug is pressed to move upwards, a pressure relief hole communicates with a pressure relief cavity, high-pressure gas is directionally exhausted through a one-way exhaust valve, and shell burst is avoided; after the pressure recovers, the reset spring automatically resets the sealing plug, the sealing performance is maintained, external impurities are prevented from invading, manual intervention is not needed, and repeated and reliable pressure relief is achieved.

The invention relates to the technical field of transformers, in particular to a power electronic transformer with a shielding structure, which mainly comprises a transformer body, a radiator is fixedly mounted on the side surface of the transformer body, a cooling fan is fixedly mounted at the end part of the radiator, and a weak current box is fixedly mounted at the end part of the transformer body. Double oil mist separation is achieved through the deoiler, one is that spiral ascending airflow is formed through guiding of the jet pipe, oil mist in gas is removed according to the centrifugal demisting principle, and the other is that residual oil mist in the gas is secondarily intercepted through the filter element pipe, so that the oil mist in respiratory airflow can be effectively removed, the oil mist interception efficiency is remarkably improved, and the oil mist separation efficiency is greatly improved. Meanwhile, the elastic membrane of the buffer can absorb sudden pressure change of the oil conservator through elastic deformation, so that the pressure fluctuation amplitude is reduced when the load changes suddenly, pulverization or structural damage of the drying agent caused by strong airflow impact is avoided, it is ensured that the moisture absorption drying agent is always in a clean and stable working environment, and the efficient dehumidification capacity is maintained.

The invention discloses a manufacturing method of an encapsulation type driver transformer with high heat dissipation efficiency, and belongs to the technical field of power electronic equipment manufacturing. The invention aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability caused by limited heat-conducting property of a potting material, simple surface heat dissipation structure and difficulty in coordination of internal thermal stress of the existing driver transformer. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array, and preparing a corresponding forming mold; a magnetic core and a winding are used as inserts to be positioned in a mold cavity, insulating colloids with different mechanical and heat conduction characteristics are poured in a vacuum environment in batches, internal gaps are fully filled with flexible colloids and stress is buffered through a segmented curing process, meanwhile, high-heat-conduction rigid colloids form an external main body and a heat dissipation structure, and an integrated potting body is formed. The method is used for manufacturing the driver transformer suitable for scenes with high power density and high heat dissipation requirements, and the heat dissipation capability and the operation reliability of the driver transformer can be remarkably improved.

The invention relates to the technical field of transformers, in particular to a transformer convenient to disassemble and assemble, which comprises a transformer body, a supporting frame is fixedly mounted below the transformer body, limiting grooves are formed in two sides of the supporting frame, limiting plates are slidably mounted in the limiting grooves, and a driving mechanism is arranged between the two limiting plates. The device comprises a supporting frame, a rotatable rotating shaft is arranged in the supporting frame, fan blades are fixedly installed outside the rotating shaft, groove bodies are formed in the two sides of the lower portion of the supporting frame, two sets of roller shafts are rotatably installed in the groove bodies, the two sets of roller shafts are jointly and movably sleeved with a conveying piece, and a heat dissipation opening is formed in the bottom of the supporting frame. According to the transformer convenient to disassemble and assemble, by arranging the limiting plate, the supporting plate can drive the limiting plate to move after making contact with the limiting plate, so that the limiting plate can clamp the place where installation is needed, the transformer body is convenient to assemble and disassemble, and operation is easy.

The invention discloses a large-current inductor based on thermal actuation multidirectional sealing compensation, and particularly relates to the technical field of inductor parts, the large-current inductor comprises an inductor lower cover, an inductor upper cover, two sliding strips and a multidirectional compensation piece, and the inductor upper cover is arranged above the inductor lower cover; the two sliding strips slide on the inner wall of the inductor lower cover; and one side of each sliding strip is provided with a multidirectional compensation piece. Through the multidirectional compensation piece, the multidirectional compensation mechanism obviously enhances the adaptability of the joint of the inductor upper cover and the inductor lower cover to thermal deformation in different directions, so that the sealing compensation capability of the inductor under multidirectional thermal expansion and cold contraction is more excellent, and the sealing durability of the inductor shell is greatly improved; therefore, the problems that the sealing compensation capacity of the inductor is insufficient under multi-directional thermal expansion and cold contraction, and the sealing durability of the inductor shell is poor are solved.

The utility model provides a spring-free type bushing end screen, which belongs to the technical field of bushing end screens and comprises a flange seat, an insulating sealing sleeve is embedded in an inner cavity of the flange seat and is clamped in the inner cavity of the flange seat through a locking component, and a locking thread is arranged at the end part, far away from the flange seat, of a binding post along the outer wall. The inner wall of the side, away from the flange hole, of the flange base is in threaded connection with a grounding piece, the grounding piece is arranged outside the locking thread in a sleeving mode, anti-skid lines are arranged on the outer wall of the grounding piece in the circumferential direction, external threads are formed in the bottom of the outer wall of the grounding piece in the circumferential direction, internal threads are formed in the top of the inner wall of the flange base, and therefore the grounding piece is in threaded connection with the top of an inner cavity of the flange base. After the grounding piece is in threaded connection with the flange seat, the end screen is in a continuous grounding state, stable operation of the transformer is guaranteed under the condition that overall stability is guaranteed, and the protection effect is enhanced.

The invention provides a magnetic core mutual inductor with a magnetic core convenient to replace, and relates to the technical field of magnetic core mutual inductors. The magnetic core mutual inductor with the magnetic core convenient to replace comprises a base. Through the matching design of the limiting blocks between the base sinking groove and the connecting seat and the circumferentially distributed limiting grooves, the connecting seat can be positioned along a plurality of preset angles, the magnetic core can be adaptively adjusted along with the angle of a mounting base plane, and the magnetic core can be quickly positioned and locked by adopting a quick locking structure that the upper shell and the lower shell are hinged and matched through a transverse and longitudinal dual positioning and locking mechanism. Opening and closing of the upper shell and the lower shell can be completed through one-hand operation, the disassembly and assembly time for magnetic core replacement or maintenance is greatly shortened, through collaborative design of a graphene heat conduction layer, a phase change heat storage layer and a flexible buffer layer, heat conduction and absorption capacity are enhanced, meanwhile, thermal expansion stress is counteracted through a flexible material, heat dissipation efficiency improvement and structural reliability are both considered, and the application range is wide. And the technical defects of high-temperature accumulation and material deformation easily caused by a single heat dissipation layer design are overcome.

The invention discloses a transformer with an electric leakage automatic power-off protection function, and relates to the field of transformer power-off protection, and the transformer comprises a main shell, cooling fins are arranged on the two sides of the outer surface of the main shell, a top cover abuts against the top of the main shell, an L-shaped folded plate is fixedly arranged at the bottom of the top cover, and a first inclined plate is arranged on the surface of one side of the L-shaped folded plate; a second inclined plate is arranged on the side, away from the L-shaped folded plate, of the first inclined plate, a transmission plate is arranged at the end, away from the first inclined plate, of the second inclined plate, and conical plates used for jacking the top cover are arranged at the end, away from the first inclined plate, of the transmission plate and the end, away from the first inclined plate, of the L-shaped folded plate. A temperature sensor is arranged at the position, between the second inclined plate and the first inclined plate, of the top of the top cover, and a warning lamp is arranged on one side of the temperature sensor. The low-voltage outlet and the high-voltage outlet are switched on and switched off, a warning lamp is matched to give an alarm, personnel can conveniently repair the transformer, meanwhile, the conical plate is driven to support the top cover, high temperature in the transformer is released, explosion is prevented, and the safety coefficient is increased.

The invention relates to a current transformer with an open circuit protection function and a protection method thereof, and belongs to the technical field of transformers, the current transformer comprises a transformer body and a protection box arranged at the front end of the transformer body, and the protection box comprises an indication mechanism used for indicating an open circuit fault of the transformer body; the box body is fixedly connected with the mutual inductor body, and a wire outlet groove is formed in the box body and used for secondary wiring; the binding posts are arranged in the box body and are connected with the secondary coil of the mutual inductor body; the protection mechanism is arranged on one side of the binding post; and the alarm mechanism is connected with the protection mechanism and is used for sending open-circuit fault alarm information. According to the device, the binding posts are short-circuited quickly through the protection mechanism, abnormal operation of the transformer caused by open circuit is prevented, continuous operation of a system is ensured, and the reliability and stability of the current transformer are improved.

The utility model discloses an assembly type electromagnet which comprises a shell and an electromagnetic assembly arranged in the shell, a positioning block is arranged on one side of the shell, a through groove is formed in the positioning block, a terminal is arranged in the through groove, the horizontal end of the terminal penetrates through the through groove to be connected with a coil on the electromagnetic assembly, and the horizontal end of the terminal is connected with the coil on the electromagnetic assembly. The vertical end of the terminal extends and is arranged in the plugging sheath, the plugging sheath is sleeved on the positioning block, and the plugging sheath and the positioning block are locked together through a locking piece. The beneficial effects of the utility model are mainly reflected in that the plug-in sheath and the housing adopt an assembled structure, the connection mode is simple and reliable, the operation is convenient, the disassembly, replacement and maintenance are convenient, and the working efficiency is greatly improved. Meanwhile, the wire and the coil are connected through the terminal, one end of the terminal abuts against the coil, the other end of the terminal is quickly connected through the inserting sheath, the connection mode is stable and reliable, a complex assembly structure does not need to be adopted for connection, safety is high, and wide applicability is achieved.

The invention relates to the field of power transformers, in particular to a convenient-to-use power transformer which comprises an insulating baffle and a voltage transformer, a limiting sleeve shell is fixedly connected to the inner side wall face of the insulating baffle, and a motor and a first limiting rod are arranged on the bottom surface of the limiting sleeve shell and located on the edges of the two sides correspondingly; the output end of the motor is fixedly connected with a threaded lead screw, and the outer side surface of the threaded lead screw and the outer side surface of the first limiting rod are movably sleeved with a pushing block. The surface of a cable wire is clamped on the inner side wall surface of a pushing block, at the moment, a threaded rod is rotated, under thread drainage of a threaded sleeve, the threaded rod rotates on the surface of an extrusion arc plate and pushes the extrusion arc plate, and along with continuous penetration of the extrusion arc plate, the surface of the extrusion arc plate is attached to the outer side surface of the cable wire; and meanwhile, an anti-skid silica gel block in the pushing block is matched to increase the friction force between the cable wire and the surface of the cable wire, and the anti-skid performance is improved.