75results about How to "Insulation effect" patented technology

The invention relates to a detection method of electric automobile insulating performance. According to the method, a relay 1 and a relay 2 are employed to connect with an anode and a cathode of a direct current bus respectively, voltage division resistors R1 and R1' are in series connection between the relay 1 and a ground (i.e. automobile body), voltage division resistors R2 and R2' are in series connection between the relay 2 and the ground, direct current source 1 injects a direct current signal to a circuit through a diode d1 and a resistor R3, and a direct current source 2 injects a direct current signal to the circuit through a diode D2 and a resistor R4. Four voltage sampling circuits are provided on the R1', R2', R3 and R4 resistors respectively. Through combining the above circuit with specific sampling and calculating steps, insulating performance detection is realized. According to the invention, a method of injecting direct current by a power source is employed to carry out detection, detection precision is high, resistance of the voltage division resistors can be selected to be a large value, influence on vehicle insulating performance in measurement is small, and normal working of an original vehicle system is not interfered.

The invention relates to an intermediate connector of an optical fiber composite high-voltage cable, which comprises a conductor connecting member, an insulating and stress balancing unit and a metal outer case, wherein the conductor connecting member is a pipe with one longitudinal H-shaped section, the middle part of the pipe is equipped with a partition board, two sides of the partition board are cavities communicated with the outside, two conductor ends of the high-voltage cable can be respectively disposed in the cavities on the two sides of the partition board inside the conductor connecting member, the outside of the conductor connecting member is sequentially connected with the insulating and stress balancing unit and the metal outer case, and the partition board is equipped with at least one passage contained in the high-voltage cable conductor for penetrating with an optical cable. The intermediate connector realizes electrical and optical connection of the optical fiber composite high-voltage electric cable.

The invention discloses an optical current sensor based on the Faraday magneto-optic effect. The optical current sensor comprises a laser generator which is used to generate polarized laser of a set wavelength, an integrated probe which comprises a magneto-optical medium, a photodetector which is used to convert an optical signal into an electrical signal, and a data analyzing and processing device which filters out noise through the combination of hardware filtering and software filtering to acquire a good response effect. A polarizer and an analyzer are arranged on two ends of the magneto-optical medium respectively, and are insulatedly packaged on both ends of the magneto-optical medium respectively. The laser generator and the polarizer are connected through an optical fiber path, andthe photodetector and the analyzer are connected through an optical fiber path. The invention further discloses a current measurement method of the optical current sensor based on the Faraday magneto-optic effect.

The invention discloses a perfusion method of protection glue for chip insulation, comprising the following steps: 1) after the protection glue is poured in a closed container, the closed container vacuumizes the protection glue and maintains vacuum for some time; 2) a chip is arranged in a glue perfusion mold; 3) the protection glue is pressurized and poured in the glue perfusion mold; 4) and the chip is taken out after the protection glue is cured. As the closed container is adopted to vacuumize the protection glue, air bubbles in the protection glue are extruded by the protection glue to be discharged due to negative pressure, the cured protection glue forms a compact structure, a protection glue layer has good insulation effect, and therefore the surface breakdown voltage of the chip is enhanced. The invention discloses a device adopting the method to pour the protection glue at the same time.

The invention relates to a hydrocarbon-ageing-resistant control cable for a petrochemical unit and a manufacturing method of the hydrocarbon-ageing-resistant control cable. The manufacturing method includes the steps that an insulating layer is evenly extruded on the periphery of each stranded copper conductor to form a control cable insulated wire core; a plurality of control cable insulated wire cores are stranded to form a control cable core. The periphery of the control cable core is sequentially wrapped by a flame-retardant fireproof longitudinal wrapping tape, an aluminum foil composite shielding tape, a hydrocarbon-ageing-resistant inside liner, a nylon inner sheath and a hydrocarbon-ageing-resistant outer sheath. The aluminum foil face of the aluminum foil composite shielding tape faces inwards and the inner side of the aluminum foil face of the aluminum foil composite shielding tape is provided with copper wire current steering wires. The components of the inside liner and the components of the outer sheath respectively comprise, by weight, 15 parts of PVC-SG2, 5 parts of NBR3305, 3-7 parts of adipic acid propylene glycol polyester,2-3 parts of epoxidized soybean oil, 0.6-1 part of barium stearate, 1-1.5 parts of lead sulfate tribasic, 0.05-0.1 part of diphenol propane, 3-5 parts of antimonous oxide, 0.1-0.5 part of chlorinated paraffin-52 and 0.3-0.5 part of dicyclopentadienyl iron. The hydrocarbon-ageing-resistant control cable is capable of resisting hydrocarbon ageing, small in external diameter and light in weight.

The invention relates to a tool for power construction, especially to a fixture for replacing a strain insulator string. The fixture comprises a cross-arm side clamp, a lead side clamp, an insulated connector and a tightening device, wherein the cross-arm side clamp is connected with the lead side clamp via the insulated connector, and the insulator connector is arranged at the two sides between the cross-arm side clamp and the lead side clamp; and the tightening device is used for shortening the relative distance between the cross-arm side clamp and the lead side clamp, is arranged at the two sides of the lead side clamp, penetrates through the lead side clamp and is then connected with the lead side clamp. The fixture of the invention can be conveniently, stably and fixedly mounted on line fittings where the strain insulator string is placed. In the process of insulator replacement, the two parallel sides of the insulator string are only equipped with insulated pull rods which are not conductive, and metal leading screws are placed behind the cross-arm side clamp and distanced from the insulator string, so that insulation performance of the insulator is not influenced.

The invention relates to a hydrocarbon substance aging resisting instrument cable for a petrochemical plant and a manufacturing method thereof. Insulation layers are arranged on the periphery of conductors in an extruded mode to form insulation wire cores, every two insulation wire cores are twisted to form one twisted wire pair, multiple sets of twisted wire pairs are twisted and form a cable core, an anti-flaming fireproof longitudinal wrapping strap, an aluminum foil composite shielding strap, a hydrocarbon substance aging resisting lining layer, a nylon internal protecting sleeve and a hydrocarbon substance aging resisting outer protecting sleeve wrap the periphery of the cable core in sequence, the aluminum foil face of the aluminum foil composite shielding strap faces inwards, and a copper wire drainage thread is arranged on the inner side of the aluminum foil composite shielding strap. The inner lining layer and the outer protecting sleeve comprise the components, by weight, 15 parts of PVC-SG2, 5 parts of NBR3305, 3-7 parts of adipic acid propylene glycol polymers, 2-3 parts of epoxidized soybean oil, 0.6-1 part of barium stearate, 1-1.5 parts of lead sulfate tribasic, 0.05-0.1 part of phenol propane, 3-5 parts of antimonous oxide, 0.1-0.5 part of chlorinated paraffin-52 and 0.3-0.5 part of ferrocene. The cable is capable of resisting hydrocarbon substance aging, small in outer diameter and low in weight.

The invention discloses a zero-sequence current measurement system and method for a novel 10kV overhead line and a performance test platform, and aims to realize zero-sequence current 0-3.5kA measurement for the equivalent transmission line by taking rare earth magneto-optic glass as a core element on the basis of a magnetic field equivalence principle. A measuring device mainly comprises a function signal generator, a power amplifier, a protective resistor, a solenoid, an integrated probe, a laser power supply, a laser tube, an input optical fiber, an output optical fiber, an optical probe, acurrent probe and an oscilloscope. According to the measuring method, the AC and DC response error is lower than 0.4%, the frequency response error is smaller than 4.8% within the range of 0-40 kHz,the transient response error is smaller than 4.1%, and the measuring method has engineering application value for achieving full-wave monitoring, auxiliary accident analysis and the like for the zero-sequence current of the 10kV overhead line.

The invention discloses a heat exchange device for granular solid materials or crystal materials which serve as heat exchange objects. In the heat exchange device, the cross sections of heat exchange main bodies are rectangular shells; heat exchange plates in which heat exchange medium flow channels are formed and a structure which is formed by granular solid material flow channels formed among all the heat exchange plates are arranged inside the rectangular shells at intervals; the heat exchange main bodies as well as the heat exchange main bodies and a material discharging cabin or a material feeding cabin in a material discharging device are fixedly connected through flanges; one surface of the rectangular shells of the heat exchange main bodies is combined with a neighboring surface through a hinge, and the surface is combined with another neighboring surface through a bolt and nut pair, so that the surface forms a movable door; one side, close to the heat exchange plates, of the movable door is provided with a strip-type pressing plate and a flexible pad which are fixed by screws; and during specific application, the heat exchange plates contacted with the flexible pad are tightly pressed against one another for constraint through the flexible pad.

The invention relates to a building structure formed by connecting prefabricated wall boards through dense ribs and a constructing method of the building structure. The building structure comprises afoundation, a prefabricated wall and a floor in sequential connection from bottom to top. The prefabricated wall comprises a group of spliced light wall boards. A group of steel pipes penetrating through the prefabricated wall serve as supporting pieces. Installing bodies with the upper surfaces fixed to the steel pipes are prefabricated in the foundation. Tie bars are arranged between every two steel pipes close to the boundaries of the left and right adjacent light wall boards. Mortar layers for sealing are arranged at the upper end and the lower end of each light wall board. The tie bars are located in the mortar layers. Beams coinciding with the upper surface of the prefabricated wall are arranged on the top of the prefabricated wall. Connecting and locking mechanisms are arranged between the tops of the steel pipes and the lower surfaces of the beams. An upper layer of the same structure is arranged on the beams. Crossing and supporting structures are arranged between the beams. The floor on the upper layer is laid on the upper end faces of the crossing and supporting structures. A ceiling is arranged on the lower end faces of the crossing and supporting structures. The building structure is convenient to construct, high in efficiency, good in thermal effect and high in integral stability.

The invention discloses a production process for a construction waste concrete porous brick; raw materials also include expanded vitrified micro-beads, the workability and thermal insulation performance of concrete can be improved, the water absorption rate and the shrinkage rate of the concrete are reduced, and the comprehensive performance of the porous brick is improved; after aging, the materials are tightly covered to make the materials mixed evenly; pores of a green brick of the porous brick are conical round pores, and thus masonry mortar can be prevented from entering the pores so as to prevent from affecting the thermal insulation performance of the porous brick; with control of the temperature and humidity of a constant-temperature and constant-humidity curing room, forming of the porous brick can be ensured. The porous brick produced by the production process has the advantages of high compressive strength, low heat conductivity coefficient, huge market potential and broad prospects.

The invention discloses a flexible high-voltage direct-current cross-linked polyethylene insulation power cable which comprises a copper conductor located in the center of the power cable. The copper conductor is sequentially wrapped by an inner semi-conductive shielding layer, a cross-linked polyethylene insulation layer, an outer semi-conductive shielding layer, a metal shielding layer, a longitudinal waterproof layer, a radial waterproof layer and a polyethylene jacket layer. The flexible high-voltage direct-current cross-linked polyethylene insulation power cable is an extruding type monopolar cable and has the advantages of being small in size, high in intensity, light in weight, high in transmission capacity, superior in insulation level, easy to lay and the like, and the problems of insulation aging even the breakdown, caused by partial electric field distortion due to space charge accumulation in an insulation body, of a traditional cable and overstressing, caused by uneven pressure distribution due to temperature sensitivity, outside the insulation body of the traditional cable are solved.

The invention discloses an integrated optical sensor probe for measuring broadband and high-amplitude current. The integrated optical sensor probe comprises magneto-optical glass, the magneto-opticalglass is fixedly connected into a shell, a first collimator and a second collimator are correspondingly and fixedly connected into the two ends of the shell, a polarizer and an analyzer are arranged at the two ends of the magneto-optical glass, an activizer is arranged in the middle of the magneto-optical glass, the first collimator and the second collimator are correspondingly connected with an input optical fiber and an output optical fiber, the input optical fiber and the output optical fiber are correspondingly connected to a polarization laser and a laser detector, the first collimator isused for converting polarized light into spatial parallel light to act on the magneto-optical glass, and the second collimator is sued for receiving spatial parallel light after the analyzer and transmitting to the output optical fiber. According to the integrated optical sensor probe, safety and reliability are achieved, impact on the insulation performance of line equipment is not produced, various types of current can be measured, integrated design is achieved, installation is convenient and reliable, frequency response is wide, and transient performance is good; volume is small, iron coreis avoided, high-low pressure isolation is achieved, and the requirements of a digital substation are met.

The invention discloses a high-voltage circuit breaker system with an applicable plateau environment performance. The system comprises a frame, a vacuum arc-extinguishing chamber, an operating mechanism and an insulating supporting rod; an upper-layer insulator and a lower-layer insulator are fixedly arranged on a vertical rack of the frame; the upper end of the vacuum arc-extinguishing chamber isconnected to the insulator located at the upper layer through an upper outlet base; the lower end of the vacuum arc-extinguishing chamber is connected to the insulator located at the lower layer through a lower outlet base; the operating mechanism is arranged in the vertical rack of the frame, and the operating mechanism is in transmission connection with a movable conductive rod of the vacuum arc-extinguishing chamber through a connecting insulating pull rod; and the upper outlet base and the lower outlet base are fixedly connected with each other through the insulating supporting rod. By upgrading and improving the insulation function of the vacuum arc-extinguishing chamber, the connecting insulating pull rod and the insulating supporting rod, the high-voltage circuit breaker system canbe applied to the plateau environment; the surface of the vacuum arc-extinguishing chamber is provided with silicone rubber, which increases the insulation performance of a circuit breaker and increases the creepage distance. The circuit breaker has very strong self-cleaning capability, and can avoid the dust accumulation so as not to influence the insulation performance of the circuit breaker. The performance of the circuit breaker meets the requirements for use in plateau areas.

The invention discloses a vacuum interrupter of a vacuum circuit breaker, which comprises a movable conductive rod, a movable end cover plate and a bellows, one end of the bellows is sleeved on the movable conductive rod, and the other end is fixed on the movable end cover plate; the bellows and the moving conductive rod are provided with a heat insulation layer, the lower end of the heat insulation layer is provided with an elastic shielding net, and the other end of the elastic shielding net is connected with the moving end cover plate. Adopting this structure can effectively avoid the arc generated when the dynamic and static contacts are broken and burn the corrugated tube, and can also isolate the surface of the corrugated tube from being heated, thereby improving the service life of the corrugated tube and the vacuum interrupter.

The invention relates to a direct-current integral charge measuring device and method for a high-voltage cable, a wire core of a measured cable sample is connected to a direct-current stabilized power supply, a shielding layer of the cable is connected to a digital picoammeter for integral measurement of charges, and the direct-current integral charge of the cable can be accurately measured. Meanwhile, the measurement process of the direct-current integral charge is displayed, the cable at different electrical tree stages is measured according to the process, the Labview software is used for performing least square fitting on the measured value, and the slope of the fitted curve corresponds to the size of the insulation leakage current in the cable. An insulation state evaluation method provided by the invention can be used for cables in different degradation stages, and lays an experimental foundation for research on quantitative evaluation of the aging state of the electrical tree.

Provided is a spark plug for which contamination resistance can be ensured with a simple structure. An insulator having a step part formed on the outer circumferential surface thereof has a center electrode disposed in a shaft hole. A tubular main fitting having a step part and a shelf part formed on the inner circumferential surface thereof is disposed radially outward from the insulator. The tippart of the insulator is positioned further toward the tip side of the insulator than is the step part. On the tip part, the arithmetic average roughness in the circumferential direction of the outercircumferential surface is 0.5 [mu]m or less. On at least a portion of the end surface and the outer circumferential surface of the tip part, a recess having a depth of 3-20 [mu]m is provided extending from the tip side to the rear-end side.

The invention provides a quick temperature control method for hot water in a vacuum cup, which comprises the following steps: a user rotates a control rotating cover, the control rotating cover rotates and can drive a rotating shaft to rotate through a power transmission component; when the control rotating cover can not continue rotating, a turning plate heat conduction mechanism is switched to the conduction state, and at the moment, heat of hot water in the vacuum cup can be sequentially dissipated outwards through the inner container/the heat conduction plate/the outer wall of the outer container made of heat conduction materials; a user slightly rotates the control rotating cover reversely to switch the turning plate heat conduction mechanism to be in a disconnected state, and at themoment, the vacuum cup conducts heat preservation on hot water through the vacuum heat preservation principle. The negative influence on the heat preservation performance of the vacuum cup is avoided,a user can rotate the control rotating cover arranged at the bottom of the vacuum cup, a heat conduction channel can be formed between the inner container and the outer container of the vacuum cup through the heat conduction plate, and hot water in the vacuum cup can be rapidly cooled to the drinkable temperature.

The invention discloses an insulation strip structure for a DC brushless motor stator winding. The insulation strip comprises a bottom surface and two side surfaces, and the length of the side surfaces at the two ends is 8 to 10 mm shorter than the bottom surface. The two ends of the side surfaces are made into inclined surfaces, and the side of the inclined surfaces and the side of the bottom surface form an angle of 30 to 60 degrees. The invention avoids possible line leakage when wires is bound, does not affect the insulation characteristic of the rotor ion core, and at the same time saves material cost and reduces product cost.

The invention discloses a construction technology of a rock wool board outer wall heat preservation system. The construction technology solves the problem that a rock wool board at the present stage is prone to disengaging from an outer wall body. According to the technical scheme, the construction technology of the rock wool board outer wall heat preservation system is characterized by comprisingthe following steps that S100, an outer wall surface is pretreated; S200, a rock wool board is pretreated; S300, the rock wool board is installed on the outer wall body, the rock wool board and the outer wall body are bonded and fixed through a heat preservation adhesive, and the fixing strength of the rock wool board and the outer wall body is further enhanced through combination of an expansionscrew sleeve, an expansion bolt, a positioning plate and an installation nut; and S400, an outer decorative surface is laid. The probability that the rock wool board falls off from the outer wall body is reduced through the construction process of the rock wool board outer wall heat preservation system.

The invention provides a method for detecting impact of SF6 gas states on insulation materials. The method comprises the following steps: step 1: preparing SF6 mixed gases, and filling the SF6 mixed gases in a detection device; step 2: collecting leakage currents flowing through the surfaces of insulation sample wafers in the detection device; step 3: according to the sizes of the leakage currents, analyzing the degree of impact of different SF6 mixed gases on the same insulation sample wafer and the degree of impact of one SF6 mixed gas on the insulation sample wafers of different insulation materials. Compared with the prior art, the method can determine the degree of impact of various states of SF6 gases on the surface insulation performance of the insulation materials, is easy to operate, and has strong practicality and popularization.