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47results about How to "Uniform distribution of field strength" patented technology

Tightly coupling hollow high-temperature superconducting inductor

The invention relates to a tightly coupling hollow high-temperature superconducting inductor comprising a short connection bus, a nonmetallic Dewar type container, a clockwise winding, an anticlockwise winding, liquid nitrogen, a refrigeration system and a polyimide film, wherein, the clockwise winding and the anticlockwise winding are dipped into the liquid nitrogen which is stored in the nonmetallic Dewar type container; the short connection bus is respectively connected with the clockwise winding and the anticlockwise winding, and the refrigeration system, the nonmetallic Dewar type container, the clockwise winding, the anticlockwise winding and the liquid nitrogen are connected to form a liquid nitrogen circulation cooling system; the insulation material polyimide film is arranged between turns and layers of the clockwise winding and the anticlockwise winding. Compared with the traditional inductor, the invention has the advantages of small volume, light weight, high reliability, low power consumption and the like, is characterized by strong current limiting capacity and automatic current equalizing ability, avoids the defects of oil leakage, easy burning and the like of the oil dipping inductor and ensures operation safety. The invention has no iron cores and no ferromagnetic saturation, and has favorable inductance linearity.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST

Ultrasonic wave and microwave extraction system with reflux devices

InactiveCN104014158AShear vibration field strengthExpand the vibration areaEnergy based chemical/physical/physico-chemical processesSolid solvent extractionStopped workMicrowave
The invention provides an ultrasonic wave and microwave extraction system for traditional Chinese medicines. The system is provided with a coordinated regulation device, wherein a first alarm device, a second alarm device and a third alarm device are arranged on the coordinated regulation device; the coordinated regulation device firstly controls microwave lead-in devices to lead in microwaves, after a certain time, the first alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls an ultrasonic wave lead-in device to lead in ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls the microwave lead-in devices and the ultrasonic wave lead-in device to change the operating powers to be respectively lower than the initial powers of the microwave lead-in devices and the ultrasonic wave lead-in device; the third alarm device sends an alarm signal to the coordinated regulation device after the microwave lead-in devices and the ultrasonic wave lead-in device work with the changed operating powers for a certain time, and the coordinated regulation device firstly controls the microwave lead-in devices to stop working and then controls the ultrasonic wave lead-in device to stop working. The best matching effects of ultrasonic waves and microwaves are achieved by arranging the coordinated regulation device to strictly control the lead-in time, lead-in order, lead-in powers and closing time of the ultrasonic waves and the microwaves.
Owner:王茜南

Outdoor high voltage solid-sealed polar pole or recloser

The invention discloses an outdoor high voltage solid-sealed polar pole or recloser which comprises a solid insulation shell, an upper wire inlet conductor, a capacitor, a vacuum arc-extinguishing chamber, a lower wire outlet conductor, a transition conductive connection part and a grounding layer. The solid insulation shell is provided with the upper wire inlet conductor, the capacitor, the vacuum arc-extinguishing chamber, the lower wire outlet conductor, and the transition conductive connection part. The grounding layer is arranged at the outer surface of the solid insulation shell. The upper and lower ends of the vacuum arc-extinguishing chamber are provided with upper and lower shielding rings. The lower end of the transition conductive connection part is provided with a shielding ring, and one side of the transition conductive connection part is also provided with temperature sensor. According to the outdoor high voltage solid-sealed polar pole or recloser, through introducing the design of the grounding layer, the shielding rings and the temperature sensor, the prepared outdoor high voltage solid-sealed polar pole or recloser can measure the current and voltage in a line, equipment is protected, the influence of an external environment is small, and thus the overall reliability stability and security are improved.
Owner:厦门普力维进出口有限公司

Needle-plate electrode corona discharge assembly for AC-DC high voltage test

The invention discloses a needle-plate electrode corona discharge assembly for an AC-DC high voltage test; the needle-plate electrode corona discharge assembly comprises a needle array electrode, and an upper metal plate electrode and a lower metal plate electrode; the needle array is nested in the upper metal plate connected with a high voltage generator; the lower metal plate electrode is grounded; the upper and lower metal plate electrodes are respectively connected with an upper insulation plate and a lower insulation plate, and the distance between the upper and lower metal plate electrodes is adjustable; a sample is placed on the lower metal plate electrode and right opposite to the needle array; after the voltage is applied, uniform corona discharge is generated between the needle array electrode and the metal plate electrodes, and the distance between the upper and lower metal plate electrodes can be adjusted so as to respectively carry out charge characteristic test and rapid corona aged test for the sample. The beneficial effects are that the height between the upper and lower metal plate electrodes so as to respectively carry out the charge characteristic test and the rapid corona aged test; the length of the lower metal plate electrode equals to 5-8times of that of the needle array, so corona discharge test can be simultaneously carried out for many samples.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1

Piezoresistor and manufacturing process thereof

The invention relates to a piezoresistor and a manufacturing process thereof. The piezoresistor is composed of a ceramic substrate, a leading-out end, an electrode layer and an insulating layer, wherein a concave area, namely, an electrode positioning area, is prefabricated on the ceramic substrate; the leading-out end is arranged on an electrode; the insulating layer is used for locally or wholly packaging the ceramic substrate, the electrode layer and the leading-out end; in the manner of sputtering or spraying electrode, an electrode hole of a mask plate is positioned and coated on a concave opening; a small electrode hole and a big concave opening form a bottle-shaped structure; the electrode is drifted and deposited into the concave opening so as to form the electrode and realize the concave opening being accurately filled with the electrode; the electrode eccentricity caused by the difference in diameter of the ceramic substrate in a batch sputtering process can be avoided; the thickness of the ceramic substrate at an edge of the concave opening is greater than the thickness of the interior; the reducing of the risk in edge arc crossing is benefited; the edge effect is weakened; the flowing property is greatly promoted; the preparation process of the piezoresistor comprises the following steps: manufacturing the ceramic substrate, performing electric polarization, connecting the leading-out end, coating the insulating layer, printing and testing.
Owner:KUSN WANFENG ELECTRONICS

Ultrasonic wave and microwave extraction system and process

The invention provides an ultrasonic wave and microwave extraction system and process. The ultrasonic wave and microwave extraction system has a cooperative regulating apparatus. The cooperative regulating apparatus controls a microwave introducing device to introduce microwaves at first, then a first alarm device sends an alarm signal to the cooperative regulating apparatus after a certain period of time, and the cooperative regulating apparatus controls an ultrasonic wave introducing device to introduce ultrasonic waves; after a certain period of time, a second alarm device sends an alarm signal to the cooperative regulating apparatus, and the cooperative regulating apparatus controls the microwave introducing device and the ultrasonic wave introducing device and successively changes the running power of the microwave introducing device and the ultrasonic wave introducing device; and a third alarm device sends an alarm signal to the cooperative regulating apparatus after the microwave introducing device and the ultrasonic wave introducing device have run at the changed power for a certain period of time, and the cooperative regulating apparatus controls the microwave introducing device to stop working at first and then controls the ultrasonic wave introducing device to stop working. According to the invention, the system strictly controls introduction time, introduction sequence, introduction power and turn-off time of the ultrasonic waves and the microwaves, so an optimal matching effect of the ultrasonic waves and the microwaves is realized.
Owner:DOCTOR PLANT GUANGDONG BIOTECHNOLOGY CO LTD

Ultrasonic wave and microwave extraction system for traditional Chinese medicinal materials

The invention provides an ultrasonic wave and microwave extraction system equipped with a reflux unit and used for traditional Chinese medicinal materials. The ultrasonic wave and microwave extraction system comprises a second reflux unit. The second reflux unit has a taper drainage cover which is inserted into a sample solution device; the large end surface of the taper drainage cover covers a whole liquid level and is located at a position which is above the liquid level and closest to the upper end of the sample solution device, so all the gas produced during microwave heating can enter the taper drainage cover and form liquid through condensation under the action of the inner wall of the taper drainage cover, and the formed liquid flows back to a sample solution along the taper drainage cover, thereby reducing air pressure above the sample solution device and improving an ultrasonic vibration effect.
Owner:深圳市御美高标电子有限公司

Outdoor compound insulation high-voltage anti-thunder support

The invention relates to the field of an electric system high voltage technique and an equipment manufacturing technique, in particular to an outdoor compound insulation high-voltage anti-thunder support. The outdoor compound insulation high-voltage anti-thunder support comprises an insulation pipe, an upper metal flange is arranged at the upper end of the insulation pipe, a lower metal flange isarranged at the lower end of the insulation pipe, the insulation pipe is filled with a metal oxide valve block set, a silicone rubber sheath sleeves the insulation pipe, and umbrella skits are arranged on the silicone rubber sheath. By means of the outdoor compound insulation high-voltage anti-thunder support, the insulating and supporting performance of a conventional high-voltage insulation support is integrally combined with the anti-thunder performance of a metal oxide lightning arrester, the insulating level is increased, the anti-thunder effect is also good, the outdoor compound insulation high-voltage anti-thunder support can be installed at an outdoor transformer substation bus or incoming line, the site space can be saved, compact arrangement of electrical equipment is facilitated, the electrical installation distance between the support and protected equipment can be shortened, the anti-thunder level of a transformer substation is effectively increased, the power supply reliability is improved, and a series of economic loss when the equipment is damaged due to insulation breakdown is reduced.
Owner:山东耐高电力器材有限公司 +1

Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise

The invention discloses an amorphous alloy dry-type transformer coil insulating structure and a method of removing local discharge signal noise. The amorphous alloy dry-type transformer coil insulating structure comprises a coil end (1), coil segments, a coil winding (3) and an outer coil part (5), and the amorphous alloy dry-type transformer coil insulating structure is characterized in that the coil end (1) is a rectangular end ring with beautiful outline and strong mechanical strength; the coil segments are isolated by dovetail cushion blocks, so that the space is enough to facilitate the heat dissipation and complete impregnation of impregnating varnish; and the coil winding (3) is wound in a rectangular cylindrical structure, the outer coil part (5) is subjected to bundling, vacuum pressure drying, varnish impregnating and curing processes so as to guarantee uniform field intensity distribution and strong anti-short circuit capability. In the local discharge monitoring process, a sensor collects a discharge signal and sends the discharge signal to a noise analyzer, and the noise analyzer separates the periodical narrow-band interference and white noise in the noise; and compensation signals with equal compensation size and opposite polarities are compensated, a real local discharge signal can be obtained, and a technician can accurately judge the insulating problem of the amorphous alloy dry-type transformer.
Owner:JIANGSU HONGAN TRANSFORMER

Low-partial-discharge-value single-structure-based mutual inductor and manufacturing method thereof

The invention relates to a low-partial-discharge-value single-structure-based mutual inductor and a manufacturing method thereof. The low-partial-discharge-value single-structure-based mutual inductor comprises a piece of semiconductor crepe paper 2, a P1 terminal 3, a conducting rod 4, a mutual inductor coil 6, and a P2 terminal 7 and is characterized in that the conducting rod 4 is arranged below a primary terminal; a C-shaped semiconductor paper plate 5 is arranged at the inner side of the conducting rod 4 and is fixed on the conducting rod 4 by the semiconductor crepe paper 2; and the mutual inductor coil 6 is sleeved into a primary coil of the mutual inductor. The mutual inductor has the following advantages: the primary coil of the mutual inductor forms a uniform electric field under a high voltage and electric field intensities of all parts of the mutual inductor are distributed uniformly; the field intensity transition is in a smooth mode; no field intensity distortion phenomenon occurs; when the partial discharge value is measured in a test voltage state, the apparent discharge magnitude is low; and the partial discharge value inside the mutual inductor is reduced in a high voltage state.
Owner:HENAN SENYUAN ELECTRIC CO LTD

Tightly coupling hollow high-temperature superconducting inductor

The invention relates to a tightly coupling hollow high-temperature superconducting inductor comprising a short connection bus, a nonmetallic Dewar type container, a clockwise winding, an anticlockwise winding, liquid nitrogen, a refrigeration system and a polyimide film, wherein, the clockwise winding and the anticlockwise winding are dipped into the liquid nitrogen which is stored in the nonmetallic Dewar type container; the short connection bus is respectively connected with the clockwise winding and the anticlockwise winding, and the refrigeration system, the nonmetallic Dewar type container, the clockwise winding, the anticlockwise winding and the liquid nitrogen are connected to form a liquid nitrogen circulation cooling system; the insulation material polyimide film is arranged between turns and layers of the clockwise winding and the anticlockwise winding. Compared with the traditional inductor, the invention has the advantages of small volume, light weight, high reliability, low power consumption and the like, is characterized by strong current limiting capacity and automatic current equalizing ability, avoids the defects of oil leakage, easy burning and the like of the oil dipping inductor and ensures operation safety. The invention has no iron cores and no ferromagnetic saturation, and has favorable inductance linearity.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST

Array type rectangular cavity microwave plasma generator

The invention discloses an array type rectangular cavity microwave plasma generator, and belongs to the technical field of microwaves. A first radiation line group and a second radiation line group are arranged in a rectangular cavity shell; each of the first radiation line group and the second radiation line group comprises a plurality of radiation lines; radiation rays of the first radiation ray group extend from the left side wall of the rectangular cavity shell to the right side wall of the rectangular cavity shell; radiation rays of the second radiation ray group extend from the right side wall of the rectangular cavity shell to the left side wall of the rectangular cavity shell; the radiation rays of the first radiation ray group and the radiation rays of the second radiation ray group intersect in sequence. The array type rectangular cavity microwave plasma generator is uniform in field intensity distribution in the cavity and uniform in airflow flowing, has the functions of temperature monitoring, microwave power adjustment and gas flow rate adjustment in good time and radiation ray protection, can generate plasmas in a large area, and is high in efficiency, good in uniformity and stability and high in reliability. And the internal discharge condition can be observed conveniently.
Owner:成都奋羽电子科技有限公司

Ultrasonic wave and microwave extraction system and extraction process for traditional Chinese medicines

ActiveCN104014159AShear vibration field strengthExpand the vibration areaEnergy based chemical/physical/physico-chemical processesSolid solvent extractionStopped workMicrowave
The invention provides an ultrasonic wave and microwave extraction system for traditional Chinese medicines. The system is provided with a coordinated regulation device, wherein a first alarm device, a second alarm device and a third alarm device are arranged on the coordinated regulation device; the coordinated regulation device firstly controls microwave lead-in devices to lead in microwaves, after a certain time, the first alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls an ultrasonic wave lead-in device to lead in ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls the microwave lead-in devices and the ultrasonic wave lead-in device to change the operating powers to be respectively lower than the initial powers of the microwave lead-in devices and the ultrasonic wave lead-in device; the third alarm device sends an alarm signal to the coordinated regulation device after the microwave lead-in devices and the ultrasonic wave lead-in device work with the changed operating powers for a certain time, and the coordinated regulation device firstly controls the microwave lead-in devices to stop working and then controls the ultrasonic wave lead-in device to stop working. The best matching effects of ultrasonic waves and microwaves are achieved by arranging the coordinated regulation device to strictly control the lead-in time, lead-in order, lead-in powers and closing time of the ultrasonic waves and the microwaves.
Owner:广州金叶健康科技有限公司

Split type diameter expanded lead for extra high tension onsite test

PendingCN109375082ALift equivalent radiusReduce surface field strengthTesting dielectric strengthBase element modificationsEngineeringPartial discharge
The invention provides a split type diameter expanded lead for extra high tension onsite test. The split type diameter expanded lead comprises at least two spacer discs and groups of split leads, eachgroup of split leads is composed of at least two sub leads, each spacer disc is provided with groups of split lead through holes correspondingly, the groups of split lead through holes are distributed annularly in the spacer disc, each group of split lead through holes includes at least two sub lead holes, each sub lead penetrates the corresponding sub lead through hole in each spacer disc, the spacer discs are fixed to the groups of split leads separately, and the two ends of each split lead are fixed via conductive wire pressing plates respectively. Splitting in different sizes are combinedto improve the equivalent radius of the diameter expanded lead effectively and reduce the surface field intensity of the lead, the weight of the lead is reduced via special material and structure, and the split type diameter expanded lead can be used for partial discharge test with strict requirements for the corona and partial discharge amount as well as for insulation test.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +4

DC cable connector

The invention provides a DC cable connector which comprises a cylindrical high voltage shielding layer 7, cylindrical joint insulation layers 9 and a joint shielding layer 10 which are coaxially arranged from inside to outside. Coaxial symmetrical horn-shaped stress cones 8 are embedded to the inner walls of the joint insulation layers 9 of two ends of the cylindrical high voltage shielding layer 7, and two horn openings are symmetrical. Each of the horn-shaped stress cones 8 comprises a cylindrical narrow port end and a wide port end whose axial section is a pair of symmetrical arcs. The inner wall of each of the joint insulation layers 9 is provided with a groove for embedding the narrow ends of the stress cones 8 and a convex block for embedding the high voltage shielding layer 7. According to the DC cable connector, the connector structure design is optimized, the electric field intensity in a stress cone root, a high voltage shielding layer root and the joint insulation layers is reduced, the field intensity distribution in the joint is uniform, and the joint insulation space charge excessive accumulation and electric field breakdown caused by high field intensity are avoided.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2

Ultrasonic wave and microwave extraction process

The invention provides an ultrasonic wave and microwave extraction process. In the process, a cooperative regulating apparatus is used. The cooperative regulating apparatus controls a microwave introducing device to introduce microwaves at first, then a first alarm device sends an alarm signal to the cooperative regulating apparatus after a certain period of time, and the cooperative regulating apparatus controls an ultrasonic wave introducing device to introduce ultrasonic waves; after a certain period of time, a second alarm device sends an alarm signal to the cooperative regulating apparatus, and the cooperative regulating apparatus controls the microwave introducing device and the ultrasonic wave introducing device and successively changes the running power of the microwave introducing device and the ultrasonic wave introducing device; and a third alarm device sends an alarm signal to the cooperative regulating apparatus after the microwave introducing device and the ultrasonic wave introducing device have run at the changed power for a certain period of time, and the cooperative regulating apparatus controls the microwave introducing device to stop working at first and then controls the ultrasonic wave introducing device to stop working. According to the invention, introduction time, introduction sequence, introduction power and turn-off time of the ultrasonic waves and the microwaves are strictly controlled, so an optimal matching effect of the ultrasonic waves and the microwaves is realized.
Owner:GUANGXI RITIAN PHARMA IND GRP

High-voltage bushing and high-voltage electrical equipment of using same

The invention relates to a high-voltage bushing and high-voltage electrical equipment of using the same. A mean field section is set into a smooth shape, is relatively regular in shape and is free ofa protruding tip, so that the electric field intensity of an electric field at various positions on the mean field section is basically the same when the mean field section is in the electric field, and the maximum electric field intensity on a sleeve body is relatively reduced, thereby ensuring the insulating capacity of the high-voltage bushing, avoiding the flashover phenomenon of the high-voltage bushing and improving the security level of the high-voltage bushing.
Owner:HENAN PINGGAO ELECTRIC +2

Plane horn antenna capable of achieving gap embedding amplitude calibration

InactiveCN104716436AImprove consistencyAvoid uneven amplitudeWaveguide hornsPhysicsHorn antenna
The invention relates to a horn antenna, in particular to a plane horn antenna capable of achieving gap embedding amplitude calibration. The antenna comprises a micro-strip feeder line (1), a horn antenna body (2) and gaps (3), wherein the micro-strip feeder line (1), the horn antenna body (2) and the gaps (3) are integrated on a dielectric substrate (4). The micro-strip feeder line (1) is connected with an antenna port (5) and an antenna narrow port (6). The horn antenna body (2) is composed of a first metal plane (8), a second metal plane (10) and two rows of metallization via hole horn side walls (11), four sub-horns are formed in the horn antenna body (2) through the middle gap (14), the left gap (20) and the right gap (21) forming the gaps (3), one ends of the four sub-horns are close to the antenna narrow port (6), and the other ends of the four sub-horns are close to but no reach an antenna aperture face (19). The aperture efficiency and the gain of the antenna can be improved.
Owner:SOUTHEAST UNIV

Prefabricated welding type cable insulation joint and manufacturing method thereof

The invention discloses a prefabricated welding type cable insulation joint and a manufacturing method thereof. The prefabricated welding type cable insulation joint comprises a joint conductor connecting layer, an inner semi-conductive connecting layer, an insulation recovery layer, a first insulation recovery layer, a second insulation recovery layer, a first outer semi-conductive layer and a second outer semi-conductive layer. The prefabricated membranes or modules of all the layers are manufactured indoors in advance and then recovered layer by layer in a construction site, so the influence of uncontrollable factors and severe environments of site construction on joint quality can be avoided; and in addition, an annular groove is formed in a first prefabricated insulation module in anaxial direction, an annular prefabricated outer semiconductor module is arranged in the annular groove, and the first prefabricated insulation module and a second prefabricated insulation module are then subjected to heating and pressurizing together, so the first semi-conductive layer, the first insulation recovery layer and the second insulation recovery layer can be integrally formed at a time,the structure that the first semi-conductive layer is buried in the first insulation recovery layer can be synchronously formed, joint recovery time can be further shortened to 2-3 hours, and fabrication efficiency is improved.
Owner:瑞邦电力科技有限公司

Multi-needle staggered direct writing electrospinning device and method for making grating lines

The invention discloses a multi-needle staggered direct-writing electrostatic spinning device and a method for making grating lines. The device includes an XY-axis moving platform, a lifting device, an electrostatic spinning high-voltage power supply, a plurality of electrostatic spinning direct-writing needle assemblies, The collecting plate, multiple driving devices, and the infusion needles of the adjacent electrospinning direct-writing needle assemblies are misplaced, and the distance between them is more than 150mm in the Y direction. The device and method for making grating lines in this patent use piezoelectric ceramic actuators to control and adjust the spacing and stepping distance of multiple electrospinning direct writing needle components, thereby controlling the spacing of grating lines and greatly improving the manufacturing process. The accuracy of the grating line; and keep the multiple electrospinning direct-writing needle components at an appropriate distance, avoiding the discharge phenomenon between adjacent infusion needles, making the field strength distribution of the electrostatic field of the system more uniform, reducing the deposition offset, Improve silk quality.
Owner:GUANGDONG UNIV OF TECH

A detection device and method for measuring partial discharge under temperature gradient

The invention discloses a detection device for measuring local discharging under the temperature gradient and the method. The detection device comprises an oil tank containing silicon oil, a temperature control unit, a sample and a local discharging measurement unit. The temperature control unit comprises a temperature control circulator and a metal electrode. The sample is arranged in the metal electrode. The metal electrode is of a hollow structure and arranged in the oil tank. The metal electrode is connected with the temperature control circulator and used for temperature control. The local discharging measurement unit is connected with the metal electrode and used for detection. According to the invention, experiments in different voltage types can be performed; local discharging behaviors of electric power device main insulation layers in different voltage types under the operation state are simulated; and the local discharging detection device is simple in structure, convenient to operate, high in safe coefficients, and capable of effectively measuring experiment results.
Owner:XI AN JIAOTONG UNIV +1

Packaging sandwich antenna with function of gap embedded phase amplitude calibration

The invention provides a packaging sandwich antenna with a function of gap embedded phase amplitude calibration, and relates to a horn antenna. The antenna comprises micro-strip feeder line (1), a horn antenna (2) and gaps (3), wherein the micro-strip feeder line (1), the horn antenna (2) and the gaps (3) are integrated on a dielectric substrate (4); the dielectric substrate (4) is located on the inner layer of a three-dimensional package (5); one end of the micro-strip feeder line (1) is connected with an internal circuit (8) through a coplanar waveguide (7) on the packaging side surface; the horn antenna (2) comprises a bottom surface metal plane (9), a top surface metal plane (10) and metallized via hole horn side walls (11); a middle gap (16), a left gap (17) and a right gap (18) are formed in the bottom surface metal plane (9) and the top surface metal plane (10); four sub-horns are arranged in the horn antenna (2), one end of each sub-horn faces the micro-strip feeder line (1), and the other end of each sub-horn is closer to but does not reach an antenna aperture surface (12). With the adoption of the antenna, the antenna gain can be improved.
Owner:NANJING UNIV OF POSTS & TELECOMM

Connecting structure of high-voltage isolated buses

The invention discloses a connecting structure of high-voltage isolated buses. The connecting structure comprises a conductive core connecting pipe and a shielding layer. The inner wall of the conductive core connecting pipe is provided with two segments of threads, conductive cores of the connecting ends of the high-voltage isolated buses are respectively provided with threads, and the threads in the inner wall of the conductive core connecting pipe and the threads in the conductive cores are mutually meshed; a conductive or semiconductive layer of the shielding layer comprises an inner conductive or semiconductive layer and an outer conductive or semiconductive layer; the inner conductive or semiconductive layer is arranged on the inner side of an insulating layer covers the whole conductive core connecting pipe; the outer conductive or semiconductive layer is arranged on the outer side of the insulating layer and extends to the outer sides of shielding layers of the high-voltage isolated buses; the two ends of the inner conductive or semicontuctive layer are respectively provided with a circle of internal stress cones; a circle of external stress cones are arranged between the shielding layer and the shielding layers of the high-voltage isolated buses; the outer conductive or semiconductive layer extends to the external stress cones. The conductive core connecting structure is simple in structure, connecting is convenient, and the mechanical strength and the conductivity of a connection part can be guaranteed. Meanwhile, the shielding layer is simple in structure and good in insulating property.
Owner:浙江金凤凰电力科技有限公司

A kind of varistor and its manufacturing process

The invention relates to a piezoresistor and a manufacturing process thereof. The piezoresistor is composed of a ceramic substrate, a leading-out end, an electrode layer and an insulating layer, wherein a concave area, namely, an electrode positioning area, is prefabricated on the ceramic substrate; the leading-out end is arranged on an electrode; the insulating layer is used for locally or wholly packaging the ceramic substrate, the electrode layer and the leading-out end; in the manner of sputtering or spraying electrode, an electrode hole of a mask plate is positioned and coated on a concave opening; a small electrode hole and a big concave opening form a bottle-shaped structure; the electrode is drifted and deposited into the concave opening so as to form the electrode and realize the concave opening being accurately filled with the electrode; the electrode eccentricity caused by the difference in diameter of the ceramic substrate in a batch sputtering process can be avoided; the thickness of the ceramic substrate at an edge of the concave opening is greater than the thickness of the interior; the reducing of the risk in edge arc crossing is benefited; the edge effect is weakened; the flowing property is greatly promoted; the preparation process of the piezoresistor comprises the following steps: manufacturing the ceramic substrate, performing electric polarization, connecting the leading-out end, coating the insulating layer, printing and testing.
Owner:KUSN WANFENG ELECTRONICS

An Improved Ultrasonic and Microwave Extraction System

ActiveCN104083895BEnhance the vibration breaking effectEnhanced shear vibration effectEnergy based chemical/physical/physico-chemical processesSolid solvent extractionMicrowaveUltrasound
The invention provides an improved ultrasonic wave and microwave extraction system. A sample solution apparatus is a cuboid cavity; a microwave introducing apparatus has an even number of microwave inlets arranged on the cavity, and the even number of microwave inlets are located at two ends of a diagonal of the space of the cavity and pairedly distributed according to farthest distance. According to the invention, since an even number of the microwave inlets are pairedly designed and the microwave inlets are pairedly distributed along two ends of the diagonal of the space formed by a sample solution in the cavity, microwaves introduced from two microwave inlets respectively intersect with ultrasonic waves when the ultrasonic waves are introduced and intersection points are located at two opposite ends of a same plane; after intersection of the microwaves and the ultrasonic waves, shear vibration effects of the ultrasonic waves are respectively enhanced at two ends of the same plane, and enhanced diffusion effects mutually transfer along the plane, which improves the vibration and wall breaking effects of the ultrasonic waves in the whole space.
Owner:湖南利农五倍子产业发展有限公司

Composite insulator with nonlinear anti-pollution-flashover structure

The invention discloses a composite insulator with a nonlinear anti-pollution-flashover structure. The composite insulator is applicable to an alternating-current power system and comprises a mandrel,wherein an end fitting ball socket is installed at one end of the mandrel, an end fitting ball head is installed at the other end of the mandrel, the outer side of the mandrel is sleeved with a nonlinear anti-pollution-flashover layer, the outer side of the nonlinear anti-pollution-flashover layer is sleeved with a silicone rubber umbrella cluster with a sheath, the nonlinear conductive anti-pollution-flashover layer is a nonlinear conductive material, and the nonlinear conductive material comprises zinc oxide ceramic powder particles and silicone rubber. The composite insulator has the advantages that by the adoption of the insulator with the nonlinear anti-pollution-flashover structure, the nonlinear conductive composite material is introduced into the composite insulator and is used for making field intensity distribution of the composite insulator along the mandrel direction uniform. Through the composite insulator, field intensity in a dry region can be lowered, and pollution flashover is suppressed; and meanwhile, manpower, paint and the like are substituted, so that cost is lowered.
Owner:TSINGHUA UNIV +1

Improved ultrasonic wave and microwave extraction system for traditional Chinese medicines

The invention provides an ultrasonic wave and microwave extraction system for traditional Chinese medicines. The system is provided with a coordinated regulation device, wherein a first alarm device, a second alarm device and a third alarm device are arranged on the coordinated regulation device; the coordinated regulation device firstly controls microwave lead-in devices to lead in microwaves, after a certain time, the first alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls an ultrasonic wave lead-in device to lead in ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls the microwave lead-in devices and the ultrasonic wave lead-in device to change the operating powers to be respectively lower than the initial powers of the microwave lead-in devices and the ultrasonic wave lead-in device; the third alarm device sends an alarm signal to the coordinated regulation device after the microwave lead-in devices and the ultrasonic wave lead-in device work with the changed operating powers for a certain time, and the coordinated regulation device firstly controls the microwave lead-in devices to stop working and then controls the ultrasonic wave lead-in device to stop working. The best matching effects of ultrasonic waves and microwaves are achieved by arranging the coordinated regulation device to strictly control the lead-in time, lead-in order, lead-in powers and closing time of the ultrasonic waves and the microwaves.
Owner:广东天保参茸有限公司

Ultrasonic microwave extraction system with flow-returning device

InactiveCN109420359AShear vibration field strengthExpand the vibration areaEnergy based chemical/physical/physico-chemical processesSolid solvent extractionStopped workMicrowave
The invention provides an ultrasonic microwave extraction system for Chinese medicinal materials. The ultrasonic microwave extraction system is provided with a coordinated regulation and control device, and the coordinated regulation and control device is provided with a first alarm device, a second alarm device and a third alarm device. The coordinated regulation and control device controls a microwave introduction device to introduce microwaves, the first alarm device sends an alarm signal to the coordinated regulation and control device after a certain time, and the coordinated regulation and control device controls an ultrasonic introduction device to introduce ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation and control device, and the coordinated regulation and control device controls the microwave introduction device and the ultrasonic induction device to change the operating power, so that the operating power ofthe microwave introduction device and the ultrasonic induction device is lower than initial power of the microwave introduction device and the ultrasonic induction device, respectively; and the thirdalarm device sends an alarm signal to the coordinated regulation and control device after the microwave introduction device and the ultrasonic introduction device operate for a certain period of timeunder the condition of the changed operating power, and the coordinated regulation and control device firstly controls the microwave introduction device to stop working, and then controls the ultrasonic introduction device to stop working.
Owner:刘虎
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