44results about How to "Prevent creepage phenomenon" patented technology

The invention provides an air purifier, and a dust deposition prevention device and method thereof. The dust deposition prevention device comprises a micro-current sensing module, a voltage control module and a voltage output module, wherein the micro-current sensing module is used for sensing current passing through a dust collecting electrode of the air purifier and outputting micro-current corresponding to the current passing through the dust collecting electrode; the voltage control module is used for comparing the magnitudes of the micro-current and a preset threshold value, and when the micro-current is more than or equal to the preset threshold value, a control signal indicating to reduce voltage applied to the dust collecting electrode is outputted by the voltage control module; the voltage output module is used for reducing the output voltage according to the control signal, so as to reduce voltage applied to a high voltage electrode of the air purifier. According to the scheme provided by the invention, the electric breakdown phenomenon between electrodes and the creepage phenomenon between electrodes and nearby materials, caused when much dust is accumulated on a dust collecting electrode after an air purifier runs for a long time, are prevented.

A rotary switch comprises an insulating base, an insulating cover plate, a rotating shaft, a spring button, a spring and a contact box; wherein, the end of the rotating shaft is provided with a rotary disk; a gear groove and a push part are arranged on the edge of the rotary disk; a spring box is arranged on the insulating base; a compression spring is arranged in the spring box; the spring button is arranged against the gear groove on the edge of the rotary disk through the spring force; a movable contact and a static contact are arranged in the contact box; an insulation button is arranged on the contact box; the insulation button connects or disconnects the movable contact and the static contact through the push part; a sector block is arranged on the insulating base; the bottom of the rotary disk is provided with two stop blocks which control the turning angle of the rotating shaft together with the sector block, and a knob is arranged on the other end of the rotating shaft. In the rotary switch, the movable contact and the static contact are arranged in the insulated contact box, thus being simple to implement and having the biggest advantage of maintaining good conducting channel in the moist environment, preventing creepage and having high safety performance.

The present invention relates to a cascade power bus bar for maglev train maglev choppers. An insulating top plate, a conductive positive plate, an insulating partition plate, a conductive negative plate and an insulating bottom plate are orderly stacked and bonded to form a motherboard. A power end connecting hole group adaptive to a power end of a power module is arranged on the motherboard, wherein, the power end connecting hole group comprises a power end positive polarity hole, a power end negative polarity hole and a power end output hole; a positive hole and a negative hole are also arranged on the motherboard and form a connecting hole pair; conducting rings are respectively inlayed in all connecting holes on the motherboard; the power end positive polarity hole, the positive hole and the negative plate of the motherboard are separated by insulating rings; the power end negative polarity hole, the negative hole and the positive plate are separated by insulating rings; the power end output hole, the positive plate and the negative plate are also separated by insulating rings. The cascade power bus bar has the advantages of ensuring few connecting lines in maglev choppers, occupying small space, having low installation and maintenance cost as well as good heat dissipation of power devices, effectively inhibiting mutual interference among devices and improving the reliability of maglev train maglev choppers.

The invention discloses an insulation column for power equipment. The insulation column for the power equipment comprises a ceramic insulator. The two ends of the ceramic insulator are respectively provided with a threaded hole. The ceramic insulator comprises an insulator body (1) and an insulation umbrella (2) arranged on the insulator body (1). The inclination angle (a) of the umbrella skirt of the insulation umbrella (2) ranges from 12 degrees to 15 degrees. The thickness (h) of the root of the umbrella skirt ranges from 8 mm to 10 mm. The outer surface of the ceramic insulator is coated with a layer of insulating paint. The insulation column for the power equipment can prevent the creepage phenomenon.

The invention discloses a dry type iron-core starting reactor for a cold water medium-pressure unit of an air conditioner, belonging to the field of starting devices of motors. An insulation cylinder is arranged between an iron core and a coil, a first supporting rod is arranged between the iron core and the insulation cylinder, an upper cushion block and a lower cushion block are arranged on the upper end and the lower end of the coil, a pair of upper clamp pieces is arranged above the upper cushion block and is connected through a first piercing screw rod, a pair of lower clamp pieces is arranged below the lower cushion block and is connected through a second piercing screw rod, a drawing screw rod is connected between the pair of upper clamp pieces and the pair of lower clamp pieces, a compression nail is arranged on the pair of upper clamp pieces, a glass fiber cylinder is arranged on the inner side layer of the coil, a second supporting rod is arranged between the glass fiber cylinder and the insulating cylinder, the outer side of the glass fiber cylinder is provided with an epoxy glass laminated sheet, an insulation supporting strip is arranged between the epoxy glass laminated sheet and the glass fiber cylinder, the outer side of the epoxy glass laminated sheet is wound with a winding and a compression ring, a wire outgoing end rind is arranged between the winding and the compression ring, and the outer side layer of the winding is externally provided with an insulating layer. The dry type iron-core starting reactor has the advantages of being reduced in size, saving the cost and preventing creepage phenomena on the surface of the coil.

The invention relates to a triangular end positive electrode plate of a wet type electric dust remover. The triangular end positive electrode plate is characterized in that a positive electrode plate main body is of a flat plate type structure; triangular end part structures (2) are arranged on two sides of the positive electrode plate; arc bent corners (3) are formed between the bottom edges and the side edges of triangles; at least two hanging holes (4) positioned at the same height are formed in the upper part of the positive electrode plate; a lifting point (5) for lifting the positive electrode plate is formed in the middle of the positive electrode plate; at least two waist-circular hanging points (6) positioned at the same height are arranged at the lower part of the positive electrode plate and are used for mounting a flushing water collection device at the lower part of the wet type electric dust remover and fixing a positive electrode plate row. The triangular end positive electrode plate disclosed by the invention is high in intensity and unlikely to deform; the dust collection effective area is large, and a water film is flat; the stability is high; the phenomenon of creepage of the positive electrode plate is effectively prevented; a distance between a negative electrode and a positive electrode can be better kept; the triangular end positive electrode plate is suitable for various transverse and longitudinal negative electrode ray arrangements and forms.

The invention discloses a sealing cover for a high-voltage cable connector. The sealing cover for the high-voltage cable connector consists of an insulating shell. The top surface of the insulating shell is open; three blind holes are formed in the bottom surface of the insulating shell; a phase line static contactor rod is fixedly arranged at the bottom of any blind hole; the external diameter of the phase line static contactor rod is smaller than the internal diameter of the blind hole; the height of the phase line static contactor rod is smaller than the height of the blind hole; at least one protruding edge is arranged on the side wall of the inner cavity of the insulating shell and parallel to the axial direction of the insulating shell; and external threads are arranged at the upper end of the insulating shell. When moveable contactor rods enter the blind holes and then are connected with the static contactor rods, connecting parts of the moveable contactor rods are positioned inside the blind holes, and the inner wall of the upper end of the blind hole and the upper side surface at the bottom of the insulating shell are arranged between adjacent connecting parts at intervals, so that the surface distance is greatly increased and the creepage phenomenon is prevented; the protruding edge on the inner wall of the insulating shell can prevent fault connection of a phase line; the upper end of the insulating shell is connected with a sealing cap through threads, so that the insulating shell can be sealed; and when the high-voltage cable connector is used underground, the water-proof and insulating performance of the high-voltage cable connector can be still kept.

The invention discloses a bus connecting device. The bus connecting device comprises an insulating sleeve with two open ends, a blocking component for blocking the inner cavity is arranged in the middle of the inner cavity of the insulating sleeve; a hardware fitting assembly body coaxial with the insulating sealing sleeve is embedded in the blocking component; the fitting assembly comprises a copper pipe, a static contact is fixedly arranged at one end of the copper pipe, a moving contact is arranged at the other end of the copper pipe, and the static contact and the moving contact are connected through a spring arranged in the inner cavity of the copper pipe. The static contact and the moving contact are combined, the bus connecting device can be fixed on a test board to be closely connected with the test board, the other end is provided with a movable contact, the other end can be quickly, accurately, tightly and reliably connected with another to-be-tested inflatable ring main unitone by one, electricity leakage is prevented due to the insulating sleeve while connection tightness is guaranteed, and accuracy of detection results can be guaranteed.

The invention relates to an electro-corrosion prevention ADSS optical fiber erecting structure comprising a corner tower fixing member and a tower pole fixing member. The corner tower fixing member comprises a first U-shaped fitting. One end of the first U-shaped fitting is fixed on the corner tower, and the other end is connected with a first insulating ring. The first insulating ring is fixedlyconnected with a heart-shaped connecting ring which is connected with a strain clamp. The strain clamp is internally provided with an ADSS optical fiber. The external layer of the ADSS optical fiber is provided with a strain inner twisted wire. The external layer of the ADSS optical fiber is also provided with a first spiral shock reducer. The tower pole fixing member comprises a second U-shaped fitting. One end of the second U-shaped fitting is fixed on the tower pole, and the other end of the second U-shaped fitting is connected with a second insulating ring. The other end of the second insulating ring is connected with a suspension body which is internally provided with a rubber clamp block, a suspension outer twisted wire and a suspension inner twisted wire in turn. The suspension inner twisted wire is internally provided with the ADSS optical fiber. The ADSS optical fiber is also externally sleeved by a first spiral shock reducer.