44results about How to "High degree of insulation" patented technology

The invention relates to a composite material core used for an enhanced cable, a preparation process and the enhanced cable. The composite material core comprises an inner core and an outer layer, wherein the inner core is composed of fiber and thermosetting resin; the outer layer comprises a fiber woven pipe and thermosetting resin which are composited to form the outer layer; and the fiber woven pipe of the outer layer is a network structure which is woven by interlacing a plurality of fiber bundles. The transversal strength of the composite material core is greatly improved by the interlaced network structure, the fatigue resistance of the composite material core is greatly improved, and the service life of the composite material core and a power transmission cable is prolonged; and the problem that the composite material core is broken when the composite material core is stranded, wound and extruded by a conductor in the manufacturing process of the cable is completely avoided. As the fiber woven pipe is adopted by the outer layer, the flexibility of the outer layer is greatly increased by the interlaced and woven structure, thereby meeting the requirement of manufacturing composite material core with major diameter.

The invention discloses a drying agent for an mine underground electric apparatus and a preparation method of the drying agent, belonging to the field of drying agent, wherein macromolecule water absorbent, compound of silicon or calcium and alkali halide or modified starch are mixed so as to prepare the powdery draying agent according to part by weight; the macromolecule water absorbent is 35-70 parts; the compound of silicon or calcium is 25-55 parts; the alkali halide or a mixture of the alkali halide and the modified starch is 10-15 parts; the grain size of the macromolecule water absorbent is 0.20-0.40mm; and the drying agent is powdery. According to the invention, raw material is wide in source and is purchased easily on the market; the drying agent is used for high/low-voltage power supply appliances worked on a mine underground high-humidity condition (RH=80-100%); the dry powder resists 6000V voltage or does not be broken down under voltage of 3000V; when moisture rate reaches to 1g/g, the dry powder resists 2500V voltage or does not be broken down under voltage of 1200V.

The invention discloses an adjustable type insulating sheath capable of preventing small animals. The insulating sheath includes a sheath body and tie bands; the sheath body is expanded as a shape ofa fan ring; one side of the sheath body is provided with at least two locking members; the other side of the sheath body is provided with at least two tie bands with one fixed end; one side and the other side of the sheath body partially overlap; and the other free end of each of the tie bands is fixed and connected by the locking members. Since the position where the one side and the other side of the sheath body partially overlap and the length of the tie bands can be adjusted, when the insulating sheath is used, the insulating sheath can be adjusted according to the size of different cablewire diameters. The insulating sheath is suitable for cables with different wire diameters, is good in versatility, and is convenient to operate.

This invention relates to a reinforced compound resin insulating material and its making method, which belongs to chemical industry field, this invention uses non-alkali glass fiber cloth or middle-alkali glass fiber cloth as the base material, unsaturated polyester resin as the binder, polystyrene resin as the reinforcing agent, and aluminum hydroxide as the filter, it mixes the binder, reinforcing agent, filter, curing agent, catalyst and auxiliary substance up into the compound solution, and then makes the non-alkali glass fiber cloth or middle-alkali glass fiber cloth immerge into the compound solution, then it covers its face with borosilicate glass film, at last it is molded by the press. The advantages of this invention is that besides the material has high insulating, mechanism and physics capabilities, it also has high resistance, high impact resistance and fine flame-proof effect and mechanical processing capability, which can be made into the insulating cloth board, insulating cloth tube, insulating stick, insulating mat and so on.

The invention relates to the technical field of transformers, in particular to a high-power planar transformer, which comprises a first magnetic core, a second magnetic core, a primary coil, a secondary coil and an insulating base, wherein the primary coil and the secondary coil are self-adhesion coils; the insulating base is provided with a centre shaft hole, the primary coil is arranged inside the insulating base and forms an integral structure with the insulating base, and the secondary coil is stacked on the insulating base; the first magnetic core and the second magnetic core are placed at two sides of the insulating base and form a magnetic path through the centre shaft hole; and the primary coil and the secondary coil are coupled. Because the coils are separately arranged inside an insulator, the insulating degree is high, the manufacturing technology of the coils is simple, and the coils can be molded integrally through mold pouring; and because the coils are arranged inside the insulator, the structure can be more compact, the volume of the transformer is reduced, and the high-power planar transformer can be applied to thinner electronic products.

The invention discloses a high-flexibility cable used for tomography medical instruments and belongs to the technical field of wires and cables special for medical equipment. The high-flexibility cable used for tomography medical instruments comprises a cable core and a master sheath, and is characterized in that the cable core comprises a power transmission line, a first control signal transmission line, second control signal transmission lines, a first measurement signal transmission line, second measurement signal transmission lines, a third measurement signal transmission line, a fourth measurement signal transmission line, a ground wire, a device interior current transmission line, a first indicator signal transmission line, a second indicator signal transmission line, a video signal transmission line, a cable core internal wrapping layer, a cable core shielding layer and a cable core external wrapping layer; the power transmission line is located in the middle of the cable core; the first control signal transmission line, the second control signal transmission lines, the first measurement signal transmission line, the second measurement signal transmission lines, the third measurement signal transmission line, the fourth measurement signal transmission line, the ground wire, the device interior current transmission line, the first indicator signal transmission line, the second indicator signal transmission line and the video signal transmission line are arranged on the periphery of the power transmission line and are wrapped together with the cable core internal wrapping layer; the cable core shielding layer is located outside the cable core internal wrapping layer; the cable core external wrapping layer wraps the cable core shielding layer; the master sheath covers the cable core external wrapping layer in an extruded mode.

The invention discloses a forming die of an outdoor mutual inductor, and a casting fixing and sealing method of the outdoor mutual inductor. The forming die comprises an upper die and a lower die which are used for forming a die cavity, the upper die is provided with a casting hole connected with the die cavity and an air outlet, a die core is arranged in the die cavity, the upper end and the lower end of the die core are connected with the upper die and the lower die respectively, the upper end and the lower end of the die core are jointed into the upper groove of the upper die and the lower groove of the lower die respectively, and the part of the die core positioned in the die cavity is cylindrical in shape; and a group of fixed pillars for supporting mutual inductor coils is arranged in the die cavity surrounding the die core, the fixed pillars are fixedly connected with the lower die, and the upper end of each of the fixed pillars is provided with a stepped clamping platform for jointing the external edge and the lower edge of each of the mutual inductor coils. The forming die and the method improve the resin casting fixing and sealing efficiency of the outdoor mutual inductor, reduce the unit energy consumption and the defective index of the outdoor mutual inductor and improve the insulation degree of the outdoor mutual inductor.

The invention relates to insulation assembly design, in particular to an insulation assembly which is used for insulation between a direct-current glow electrode and the wall of a vacuum chamber in the nuclear fusion reactor. The insulation assembly comprises nuts, caps, concave-convex concentric annulus gaskets, flat plate type concentric annulus gaskets having different latus rectums, an electrode fixing plate, fixed bolts, concave-convex concentric annulus gaskets each of which has a sleeve structure, the wall in the vacuum chamber, and the like. The concave-convex concentric annulus gaskets having the sleeve structure, the electrode fixing plate, the flat plate type concentric annulus gaskets having different latus rectums, the concave-convex concentric annulus gaskets and the caps sequentially sleeve the fixed bolts in an overlapped manner; each cap for fastening a ceramic insulation piece and the electrode fixing plate is arranged on one end of the corresponding fixed bolt, and the other end of each fixed bolt is connected with the wall in the vacuum chamber. The insulation assembly disclosed by the invention is directly related to the processing effect of the wall of the nuclear fusion vacuum chamber, and further the determination of the quality of plasma discharge. The insulation assembly disclosed by the invention is especially applicable to a Tokamak device, of which the first wall is provided with black lead and employs fiber, in the vacuum chamber of the fusion device.

The invention discloses a flame-retardant and environment-friendly cable. The flame-retardant and environment-friendly cable comprises a cable main body, a cooling layer, cable cores and a wear-resistant layer, wherein buffer pads are arranged on an inner wall of the cable main body, tail ends of the buffer pads are connected with a flame-retardant layer, the cooling layer is fixedly arranged at an inner side of the flame-retardant layer, guide wires are fixedly arranged at an outer circle of the cooling layer at equal distance, an insulation ring is arranged at an inner side of the cooling layer, the cable cores are fixedly arranged at an inner side of the insulation ring, isolation pads are arranged at two sides of an outer wall of each cable core, the wear-resistant layer is arranged onan outer wall of the cable main body, a limitation groove is formed in a surface of the wear-resistant layer, an installation groove is formed in an outer side of the limitation groove, and crack-prevention layer is embedded into an outer circle of the wear-resistant layer. By design of the buffer pads, pressure generated by an outer side of the cable main body can be diffused, the uniform stressof the whole cable is ensured, moreover, external fire is prevented by the flame-retardant layer, the combustibility of the cable is reduced, and the loss degree of emergency condition is reduced.

The invention provides a transformer station combined protective electrical appliance, comprising a fuse, a lightning arrester and a connecting plate; the fuse comprises a porcelain sleeve, a sealed wire inlet sleeve is arranged at the top of the porcelain sleeve, an inlet wire is arranged in the wire inlet sleeve, a sealed rubber cover is arranged at the bottom of the porcelain sleeve, the rubber cover is provided with a fuse carrier inlet and a sealed wire outlet sleeve, an outlet wire is arranged in the wire outlet sleeve, a hoop is arranged outside the porcelain sleeve, and the hoop is provided with a connecting portion connected with a fuse cross arm; a metal connecting portion is formed at the top of the lightning arrester, an insulating cover is arranged at the bottom of the lightning arrester, a wire inlet lead and a wire outlet lead are arranged on the insulating cover, and he outlet wire on the fuse is electrically connected with the wire inlet lead on the lightning arrester; one end of the connecting plate is connected with the connecting portion on the hoop, the other end of the connecting plate is fixedly connected with the metal connecting portion of the lightning arrester, and a grounding terminal is arranged on the connecting plate. The transformer station combined protective electrical appliance is simple in structure and convenient to install, and can be widely applied in the field of power.

A measuring instrument of air ion with dehumidification function at middle part of insulation supporting frame and bottom part of collector outer shell in the ion collector can remove the humidity on the insulation supporting frame for raising the insulation ability to let the instrument to be used reliably in the wet environmental condition with the humidity up to 90%. The invented instrument has a built in rechargeable battery or to be charged with the electricity through external electric supply source. it is specially good for outdoor field use because of the advantages as above listed.

The invention provides an intelligent distribution box of a distribution transformer, relates to intelligent power supply distribution management equipment, and aims at solving the problems that the connected point of a box body of an existing distribution box and external main power supply is arranged outside the box, so that the insulating sealing property is poor, and the box body is easily filled with water or affected with damp to oxidize, and is easy to age or overheat and the like, and the problems that the labor intensity of power constructors is increased during power-off maintenance and the like. The intelligent distribution box comprises an intelligent reset switch, an intelligent controller, a current relay protector, a control switch, a grounding protection device and a metering current transformer; the intelligent reset switch, the intelligent controller, the current relay protector, the control switch, the grounding protection device and the metering current transformer are fixed in the box body; the control switch is connected with the intelligent controller; the intelligent controller is connected with the intelligent reset switch; the intelligent reset switch is connected with the metering current transformer; the metering current transformer is connected with the current relay protector and an electric energy meter; and the intelligent reset switch is connected with the grounding protection device and load respectively. According to the intelligent distribution box, the main power supply can be automatically cut off by a distribution line in a power failure; and a three-phase short circuit of a load line is grounded, so that the safety of power supply maintenance personnel is ensured.

The embodiment of the invention provides a motor winding wire embedding method, which comprises the following steps that after a binding wire of a winding is unfastened, a thumb and an index finger of a left hand pinch a part, close to a left corner, of a straight line side, a left effective side is rotated by 90 degrees by a right hand, the thumb and the index finger of the left hand pinch a part, close to a right corner, of the straight line side, and the right effective side is rotated by 90 degrees by the right hand; the left side effective edge and the right side effective edge rotate in the same direction, the right hand fixes the winding, the thumb and the index finger of the left hand pinch the lower layer edge close to the corner to be flat, then the upper layer edge close to the corner is pinched to be flat, the left hand does not move, the right hand cards the two side effective edges into a flat shape, the carded winding serves as a winding to be embedded, and the two side effective edges of the winding are rotated by 90 degrees in the same direction, the effective edges on the two sides of the winding are combed to be flat, so that coils on the effective edges of the winding are parallel, intersection between turns and strands of the winding is avoided, the difficulty of driving slot wedges into the hanging grooves is reduced, the effective edges of the winding are embedded into the hanging grooves without using a marking-off plate, and damage to an insulating layer of the winding is avoided.

The invention relates to the field of cables, in particular to a cross-linked polyethylene insulating halogen-free low-smoke flame-retardant fire-resisting cable. The cross-linked polyethylene insulating halogen-free low-smoke flame-retardant fire-resisting cable comprises a plurality of cable cores, wherein each cable core comprises a conductor, each conductor is extruded with a cross-linked polyethylene insulating layer, each cross-linked polyethylene insulating layer is wrapped with a flexible metal-plastic mixed layer, the flexible metal-plastic mixed layers are extruded with a composite armor layer, the composite armor layer is extruded with a metal shielding layer, and the metal shielding layer is extruded with a halogen-free low-smoke flame-retardant layer; each flexible metal-plastic mixed layer comprises an aluminum metal sleeve and flame-retardant nitrile rubber arranged in the aluminum metal sleeve; and a flexible metal isolating layer for supporting and fixing the cable cores and filled with glass powder is twisted among the cable cores. The cross-linked polyethylene insulating halogen-free low-smoke flame-retardant fire-resisting cable ensures the internal stability ofthe cable, and can guarantee the use of the cable in a certain period of time in case of an accident; and the flexible metal-plastic mixed layers are extruded on the cable cores, so as to enhance thestrength and insulation degree of the cable.

The invention provides a convenient assembling and disassembling isolation tool for line hanging, and solves the problem that the life and property safety of people and the safety of electric power, communication and radio and television networks are threatened due to disordered hanging of lines. The tool is provided with a first assembling and disassembling hoop part, a second assembling and disassembling hoop part and a protection rod, the first assembling and disassembling hoop part clamp a first line, the second assembling and disassembling hoop part clamps a second line, a safe distance is kept between the first line and the second line which are mixed and matched through the protection rod, the first assembling and disassembling hoop part is rotationally connected with a center shaftof the upper end face of the protection rod, and the second assembling and disassembling hoop part is rotationally connected with a center shaft of the lower end face of the protection rod, so that the line crossing points hung at various angles are flexibly isolated. Directly through the adjustment of a first movable handle and a second movable handle, the first assembling and disassembling hooppart or the second assembling and disassembling hoop part forms a notch for the first line or the second line to enter a clamping area, so that the trouble of traditional assembling and disassemblingwith a screwdriver and rubber pliers is avoided, and the operation is convenient.