3370results 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 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 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 embodiment of the invention provides a vibration-sensing automatic power-off device for a large transformer. The vibration-sensing automatic power-off device comprises a shell, the extending end of the first conducting rod is fixed to the shell and extends into the shell, and the other end of the first conducting rod is located outside the shell and connected with the transformer. The leading-in end of the second conducting rod is led into the shell; the plurality of locking mechanisms are arranged on the inner wall of the shell; the acceleration monitoring unit is installed on the shell and used for monitoring the acceleration of the device and generating a corresponding monitoring signal. In a normal state, the second conducting rod is clamped by the locking mechanism, so that the first conducting rod and the second conducting rod are conducted; when an earthquake occurs, the central control unit triggers the circuit breaker to be disconnected, the locking mechanism relieves clamping of the second conducting rod, and dual protection of electrical isolation and mechanical breaking is formed. And after the earthquake, the locking mechanism automatically resets and recovers conduction. The automatic power-off device has the full-process response capability of earthquake real-time sensing and quick response disconnection and reset, effectively prevents potential safety hazards such as short circuit and fire caused by an earthquake, and improves the survivability of power equipment in a strong earthquake environment.

The invention belongs to the technical field of transformer heat dissipation, and particularly relates to a power transformer heat dissipation device with an alarm function, which comprises a protection assembly, an adjusting device is mounted in an inner cavity on one side of the protection assembly, a heat dissipation assembly is mounted on the adjusting device, and the adjusting device can drive the heat dissipation assembly to slide up and down in the height direction of the protection assembly. The heat dissipation assembly can slide up and down in the shell through cooperation of a linear motor sliding rail and a linear sliding block, a corrugated pipe is arranged on the heat dissipation assembly in a communicating mode, and the exhaust end of the corrugated pipe is movably arranged in a hole formed in the intersection position of sliding holes formed in the longitudinal swing plate and the transverse swing plate in a penetrating mode. The multiple sections of meshing teeth arranged on the vertical plate are matched with the gear to drive the exhaust end of the corrugated pipe to swing up and down, meanwhile, the sliding ring arranged on the insulation guide rod in a sleeving mode is matched with the linkage rod to drive the exhaust end of the corrugated pipe to swing left and right, cold air is evenly dispersed to all positions of the shell, and it is ensured that electric appliance elements in the shell are evenly cooled.

The invention discloses an internally-inserted water-cooled magnet device for a high-field hybrid magnet. The internally-inserted water-cooled magnet device comprises a container assembly and a magnet coil assembly arranged in the container assembly. The container assembly comprises an upper barrel assembly, a container end cover, a hydraulic machine assembly, a center pipe assembly, an inner supporting assembly, a middle barrel assembly, a lower barrel assembly and an electric connecting assembly. The hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention discloses a novel internally-inserted water-cooled magnet container assembly for a hybrid magnet with high mechanical stability, which comprises an upper cylinder component, a container end cover, a hydraulic machine component, a central tube component, an inner support component, a middle cylinder component, a lower cylinder component, an electric connection component and a first conductive flexible connector, and a magnet coil assembly comprises a plurality of radially-sleeved coils; the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is increased, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, the dismounting and maintenance process of the mixed internally-inserted water-cooled magnet device is simple and rapid, and the efficiency is high. And the dismounting efficiency is improved.

The invention relates to the technical field of inductance devices, and discloses a single-phase oil-immersed air-core reactor body structure which comprises a reactor frame. The reactor frame comprises an upper pressing plate and a lower pressing plate; an inner insulating cylinder assembly, a coil and an outer insulating cylinder assembly are sequentially arranged in the upper pressing plate and the lower pressing plate from inside to outside in a sleeved mode in the radial direction, and the inner insulating cylinder assembly, the coil and the outer insulating cylinder assembly are coaxially arranged. The edges of the upper pressing plate and the lower pressing plate are connected through a plurality of non-metal connecting screws, and laminated wood nut suites are respectively arranged between the plurality of non-metal connecting screws and the upper pressing plate and between the plurality of non-metal connecting screws and the lower pressing plate; the top of the upper pressing plate makes contact with the hydraulic machine, and the hydraulic machine can press the coil through the upper pressing plate. The edges of the upper pressing plate and the lower pressing plate are connected through the multiple non-metal connecting screws, the tensile strength and the bending strength of the non-metal screws are large, and compared with metal screws, the additional loss can be reduced by 60%-90%.

The invention discloses a fireproof and explosion-proof safety type transformer, and relates to the technical field of transformers, one side of the top end of an embedded fixing box is connected with an outer row fixing pipe in a penetrating manner, the top end of the inner side of the outer row fixing pipe is fixedly provided with a pressing spring, and the bottom end of the pressing spring is fixedly provided with an I-shaped clamping frame; a clamping sealing ring is fixed to the position, corresponding to the I-shaped clamping frame, of the inner side of the outer exhaust fixing pipe, a plurality of exhaust fixing holes are formed in the outer side end of the outer exhaust fixing pipe at equal intervals, and isolation double-layer sleeves are symmetrically welded to the top end of the inner side of the embedded fixing box. The situation that the environment is polluted due to the fact that transformer oil overflows when hot steam is exhausted is avoided, meanwhile, resources are recycled, resource waste is reduced, the transformer oil is supplemented in real time, stability of internal protection is guaranteed, meanwhile, an internal fire extinguishing component is used for directly conducting fire extinguishing treatment on the interior, and the environment is protected. And the condition of high-pressure deflagration and explosion caused by internal fire is avoided.

The invention relates to a safety system for automatic pressure relief during an internal arc fault period of an alternating-current transformer bushing, and the system comprises the alternating-current transformer bushing which is used for accommodating an insulating medium; the first pressure relief structure is arranged between the alternating-current transformer bushing and the vacuum container and is used for communicating the alternating-current transformer bushing with the vacuum container under the condition that the internal pressure of the alternating-current transformer bushing exceeds a preset pressure threshold value; the optical signal detection device is arranged in the alternating-current transformer bushing, is in communication connection with the control device, and is used for detecting an optical signal, converting the optical signal into an electric signal and outputting the electric signal to the control device; the control device is in communication connection with the second pressure relief structure and is used for outputting a starting instruction to the second pressure relief structure under the condition that it is determined that the arc fault occurs according to the electric signal; and the second pressure relief structure is arranged on the middle flange and is used for communicating the alternating-current transformer bushing and the external space in response to the opening instruction. By adopting the system, early fault intervention and controllable pressure release can be realized.

The invention discloses an installation positioning device, a superconducting magnet system and a fusion reactor device, and belongs to the technical field of fusion reactor engineering. The mounting and positioning device comprises a back plate assembly and a clamping assembly, wherein the back plate assembly is used for connecting a coil main body of the superconducting magnet system; the clamping assembly comprises a first insulating part, two clamping parts and a plurality of adjusting parts, and the first insulating part forms a mounting cavity which is at least used for accommodating a coil joint of the superconducting magnet system; the first insulating part is arranged between the two clamping parts, and the clamping parts are connected with the back plate assembly; the multiple adjusting pieces are arranged outside the first insulating piece in a surrounding mode, and the adjusting pieces are connected with the two clamping pieces respectively and used for adjusting the clamping force between the two clamping pieces. The coil connector is positioned and fixed for multiple times through the back plate assembly and the clamping assembly, the mechanical stability and the electrical insulation performance of the coil connector are improved, and the disassembly, assembly and maintenance cost is reduced.

The invention relates to the technical field of transformers, in particular to an amorphous alloy oil-immersed transformer convenient to dissipate heat, which comprises a transformer body and a tap switch fixedly mounted at the top of the transformer body, a deflector rod is matched with a plurality of grooves, the tap switch and a fixed seat are coaxially arranged, and the fixed seat is fixedly connected with the deflector rod. The device comprises a fixed seat, the top of the fixed seat is in threaded connection with a protective cover, an annular rotating seat is slidably mounted in the fixed seat, an adjusting seat is arranged at one end of the top of the annular rotating seat, a limiting mechanism is arranged in the adjusting seat, and a connecting mechanism is arranged at the end, away from the adjusting seat, of the top of the annular rotating seat. And an adjusting mechanism is arranged in the fixed seat. The transformer has the advantages that the problem that in the prior art, due to the fact that abrasion may occur between the deflector rod and the groove after long-term use, the gap between the deflector rod and the groove is increased, and the possibility that the deflector rod is disengaged from the groove is increased is solved, and normal use of the transformer body is guaranteed.

The utility model relates to a transformer ascending flanged base explosion-proof structure, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a middle barrel (21) and a lower barrel (22) are connected in a welded mode through an annular transformer ascending flanged base pressure releasing plate (16), and an inner ring of the transformer ascending flanged base pressure releasing plate (16) is connected with the top of the lower barrel (22) through a second transformer ascending flanged base pressure releasing plate welding seam (18); an outer ring of a transformer ascending flanged base pressure release plate (16) is connected with the bottom of the middle barrel (21) through a transformer ascending flanged base pressure release plate welding seam I (17); and an arc-shaped transformer ascending flanged base explosion-proof protection plate (8) is arranged outside the lower cylinder body (22) and covers the middle cylinder body (21) and the transformer ascending flanged base pressure release plate. The explosion-proof device has the beneficial effects that the explosion of the transformer ascending flanged base caused by thunder, lightning, short circuit and the like can be greatly reduced, so that the loss caused by the explosion is reduced, and the safety of workers is protected.

Device comprising at least a top-side hood (10) for receiving an electrical component, such as a terminal block, for attaching at least one electrical conductor, and a bottom-side base (14) which is provided with a bottom-side opening (16) for receiving another electrical component, such as an insulating candle, which can be electrically connected to the first electrical component, characterized in that the hood (10) and the base (14) are two separable components which, when assembled, form a cover (18) as a whole and which, by means of a height adjustment (20) with a locking device, assume such different positions relative to each other that differently designed electrical components in a predefinable mounting frame can be covered with only one cover (18).

The invention relates to the technical field of inductors, in particular to a common-mode and differential-mode integrated annular inductor assembly which comprises an annular magnetic core, a first winding and a second winding, and the common-mode and differential-mode integrated annular inductor assembly is reversely wound on the annular magnetic core in a double-wire parallel winding mode to form a common-mode path. The starting end of the first winding is a first input pin, the terminating end of the first winding is a first output pin, the starting end of the second winding is a second input pin, the terminating end of the second winding is a second output pin, and the first output pin and the second output pin are connected with a load through a circuit topology and are automatically connected in series to form a differential mode path. Through magnetic core partition and annular distributed air gap design, collaborative optimization of common-mode magnetic field offset and differential-mode anti-saturation is completed, and the technical effects of high-frequency common-mode suppression and broadband differential-mode suppression are achieved; through a gradient leakage inductance winding technology, dynamic adaptation of a differential mode inductance value is completed, and the flexible filtering requirement of adapting to different noise spectrums is met.

The oil-immersed transformer oil tank sealing anti-seepage structure comprises a transformer oil tank, a fixing assembly and an end cover are arranged at the upper end of the transformer oil tank, the transformer oil tank is connected with the end cover through the fixing assembly, and a jacking mechanism, a transmission assembly and a pressing assembly are arranged at the upper end of the end cover; the jacking mechanism provides power for the pressing assembly through the transmission assembly. The lower end of the end cover is fixedly connected with a sealing ring and a sealing air bag, the side end of the sealing air bag is fixedly connected with a connecting pipe, the end, away from the sealing air bag, of the connecting pipe penetrates through the end cover and is fixedly connected with the end cover, and the connecting pipe communicates with the pressing assembly. By arranging the fixing assembly, the sealing ring and the sealing air bag, double-layer sealing can be achieved at the joint of the end cover and the transformer oil tank, and therefore leakage of transformer oil is effectively prevented.

The present invention relates to the technical field of power transformers and discloses a power transformer device with a monitoring function, comprising a heat dissipation frame, an inner wall of the heat dissipation frame being fixedly connected to a transformer body, a protective device being provided on the right side of the transformer body, a detection device being provided on the left side of the transformer body, an inner wall of the heat dissipation frame being fixedly connected to a bottom plate, a cleaning device being provided on the top of the bottom plate, a ventilation fan being fixedly connected to the inner wall of the bottom plate, an ash storage device being provided on the inner wall of the bottom plate, and a support rod being fixedly connected to the bottom of the bottom plate. The present invention can not only detect the temperature of the transformer, but also cut off the power to the transformer when the temperature of the transformer is higher than a set temperature, thereby protecting the transformer. At the same time, a ventilation fan is additionally provided at the bottom of the heat dissipation frame, thereby improving the air circulation in the heat dissipation frame and improving the heat dissipation efficiency of the transformer body.

The utility model relates to the technical field of low-voltage complete equipment, in particular to a mutual inductor, a mutual inductor combination main circuit connector assembly and a mutual inductor combination main circuit connector unit. The mutual inductor comprises a mutual inductor insulation shell wrapping a mutual inductor iron core coil, the mutual inductor insulation shell is provided with a copper bar through hole, the back face of the mutual inductor insulation shell is provided with an insertion sleeve extending outwards, and the insertion sleeve is used for being inserted into the outer portion of the copper bar insertion sleeve extending outwards of the matched main circuit connector. The utility model has the beneficial effects that the standardization of the fixing process of the mutual inductor is realized, the unit depth is not changed, the connection structure of a non-lap-joint main circuit is not changed, and the use amount of connecting copper bars is not increased. Copper bar fasteners penetrate through the fixing holes and the copper bar fixing holes to fix the mutual inductor and the main circuit connector together, and equivalently, manual installation of the mutual inductor is zero.