48results about How to "Improve grounding efficiency" patented technology

A mold-casting structure comprises at least one dishing and a plurality of micro-protrusions. The dishing(s) formed on the surface of a mold-casting body, the plurality of micro-protrusions sticking out of the surface of the dishing, and the tops of the micro-protrusions constitute on a plane, so that the grounding issue of the circuitry embedded in the mold-casting structure caused by the dishing can be resolved. The dishing can be verified by daubing paint and scrapping thereafter, the location of remaining paint is deemed the dishing. Moreover, a three-dimensional measurement instrument can be employed for more precise measurement. The micro-protrusions can be formed on the dishing by mechanical processing or electric discharge machining (EDM). Alternatively, a mold with a structure matching the micro-protrusions can be formed first, and consequently the micro-protrusions are formed directly by mold-filling, which is more suitable for mass production.

Transporting aircraft within an airport operational area. An airport operational area within which an unmanned ground vehicle is configured to selectively tow aircraft is defined. A ground tracking system provides position data signals to determine the position of the unmanned ground vehicle position relative to positions in at least one operational area path contained in the airport operational area. This positioning is supplemented by the position as determined from an electronic tracking system, such as a radar-based system. The unmanned ground vehicle is then selectively guided to engage and tow the aircraft to a selected position within the airport operational area.

In a structure for grounding a shielded cable, a braided wire is extended radially outwardly of core covering portions to form a flange portion, and an associated wire is connected to the flange portion by the use of sleeve members, thereby effecting the grounding.

The invention belongs to the field of grounding systems, and particularly relates to conducting concrete, a manufacturing method thereof and an application. The concrete comprises, by weight, 6-9 parts of carbon fibers, 43-50 parts of steel fibers, 68-78 parts of graphite, 1.38-1.58 parts of dispersing agents, 10-15 parts of preservative and 5.2-6 parts of water reducing agents. The concrete solves the problems that grounding resistance value requirements are difficultly met by a common grounding method in partial areas, a common grounding system is high in construction difficulty due to topographical restrictions, construction difficulty is effectively reduced, grounding efficiency is improved, and operability is good.

A cavity-down semiconductor package mainly includes a heat spreader, a substrate, and a chip. The substrate has an outer surface, an inner surface opposing to the outer surface and an opening passing through the outer and inner surfaces. The inner surface is attached to the heat spreader to form a chip carrier with a chip cavity. The chip is located in the opening and electrically connected to the substrate. The substrate includes a metal cover layer over the inner surface. The metal cover layer can be bonded to the heat spreader to establish a thermal-coupling relationship to improve adhesion, heat conductibility and electrical performance between the substrate and the heat spreader.

The invention discloses an air balance hydraulic pumping unit for an offshore platform. The air balance hydraulic pumping unit for an offshore platform comprises a rope hanger, a movable pulley, a flexible connection mechanism, a fixed pulley, an energy accumulator, a bracket, a composite step type hydraulic cylinder and a hydraulic pump system. A hydraulic cylinder is arranged in the inner space of a truss type rack; the lower end of a piston rod is connected with the movable pulley; and the energy accumulator is arranged at the top of the bracket. The pumping unit is of a simple structure and convenient to install, has more obvious energy-saving effect than a conventional energy-saving type pumping unit, and overcomes the shortcoming that the traditional pumping unit cannot meet the requirements of offshore oil production due to the large volume, large floor area and large weigh of the entire machine. The invention provides a novel oil production apparatus for later-stage development of an offshore oil field in China.

The invention discloses an oil pumping unit system with multiple sections of steam injection packer parts. The oil pumping unit system comprises an oil pumping unit body, a steam injection thermal production oil pump and a packer assembly. The oil pumping unit body is connected with the steam injection thermal production oil pump through a traction system of the oil pumping unit body. The steam injection thermal production oil pump is connected with the packer assembly through a release sub. The packer assembly comprises the release sub, a first oil discharging pipe, a first side sealing spindle, a second oil discharging pipe, a second side sealing spindle, a third oil discharging pipe, a third side sealing spindle, a packer body, a one-way valve, a first spraying head, a second spraying head, a sealing ring, a fourth oil discharging pipe, a third side sealing spindle, a fifth oil discharging pipe, a fourth side sealing spindle, a third spraying head, a ventilation pipe, a cable inletguiding part and a side gas pipeline.

The invention discloses a cable grounding connection device for an electrical distribution box. The cable grounding connection device comprises a lead wire connection part, a grounding connection part and a corresponding protective shell, wherein the grounding connection part is connected with the lead wire connection part; a wire clamping space for clamping a cable grounding bare wire is arranged on the lead wire connection part; the surface for facilitating installation of a grounding wire is arranged on the grounding connection part; and the surface, for clamping the cable grounding bare wire, in the wire clamping space and the grounding connection part have conductivity; the lead wire connection part is used for clamping the cable grounding bare wire through the wire clamping space when used; and the grounding connection part is connected with the grounding wire, so that connection of a cable and the grounding wire is achieved; the cable grounding connection device is simple in structure, easy to process, simple and convenient to install and dismantle, good in safety and high in universality; and the grounding efficiency can be greatly improved.

The invention discloses a floor type multi-rope oil extractor system. The system comprises an oil extractor main body, a gas injection thermal recovery oil extracting pump and a packer module; the oilextractor main body is connected with the gas injection thermal recovery oil extracting pump through a traction system thereof; the gas injection thermal recovery oil extracting pump is connected with the packer module through a hand-free joint; the oil extractor main body comprises a concrete foundation, a shifter guide rail, a rail clamper module, a control cabinet, a bracket, an adjustable balance counterweight, an upper platform, an upper guard combination, a power device, a brake, the traction system and an elevator; the traction system comprises a traction wheel, a steel wire rope, a movable pulley set and a steel wire rope joint; the steel rope is divided into an elevation steel wire rope and a balance steel wire rope; one end of the elevation steel wire rope is fixed on the traction wheel and bypassed through the traction wheel, and the other end is fixedly connected with the steel wire rope joint on the bracket through the elevator and the movable pulley on the elevator; andthe balance steel wire rope is opposite to the elevation steel wire rope, one end is fixed on the traction wheel and bypassed through the traction wheel, and the other end is fixedly connected with the steel wire rope joint on the bracket through the adjustable balance counterweight and the movable pulley on the adjustable balance counterweight.

The invention relates to the field of high-voltage grounding, and discloses an anti-unhooking high-voltage grounding wire device which comprises an insulating rod, a conductor end wire clamp, an anti-unhooking assembly and a grounding end wire clamp. The conductor end wire clamp is arranged at the top of the insulating rod and is a U-shaped wire clamp with a lateral opening, the conductor end wireclamp drives the conductor end wire clamp to clamp a cable by manually rotating the insulating rod, and the anti-unhooking assembly is arranged at the opening of the conductor end wire clamp and enables the cable to enter from the upper half portion of the opening of the conductor end wire clamp and disengage from the lower half portion of the opening. And the grounding end wire clamp is connected with the conductor end wire clamp through a copper wire. According to the anti-unhooking high-voltage grounding wire device, the anti-unhooking assembly is arranged, so that the cable enters from the upper half portion of the opening of the conductor end wire clamp and falls off from the lower half portion, the clamped cable is located at the upper half portion of the conductor end wire clamp and cannot fall off, the cable can be effectively prevented from being separated from the conductor end, and the grounding efficiency is improved; and grounding safety is ensured.

The invention discloses a method for synthesizing S-adenosylmethionine from DL-methionine by modifying saccharomyces cerevisiae based on a CRISPR technology and an application. Genome modification methods of gene knock-in, gene knock-out and Delta site integration based on a CRISPR/Cas9 technology are constructed in diploid industrial saccharomyces cerevisiae; and furthermore, by utilizing the methods, DAAO and L-PheDH expression cassettes are knocked into an HPA3 gene locus of the saccharomyces strain, DAAO and L-PheDH expression cassettes are knocked into an SAH1 gene locus, and an SAM2 geneexpression cassette is knocked into an SPE2 gene locus, so that the capability of synthesizing the S-adenosylmethionine from the DL-methionine by obtained engineering bacteria is remarkably improved.

The invention belongs to the technical field of mechanical equipment for oil extraction in oil fields, and particularly provides an oil pumping unit at the mouth of a well. The oil pumping unit comprises a pumping rod as well as a switch reluctance machine, a speed reducer, a rotary disk, an eccentric shaft and a motor control cabinet, wherein one end of the switch reluctance machine is electrically connected with the motor control cabinet, and the other end thereof is connected with the rotary disk through a universal driving shaft; the eccentric shaft is arranged on the rotary disk; the pumping rod is connected with the eccentric shaft. By utilizing the advantages of the switch reluctance machine, the oil pumping unit at the mouth of the well removes belt drive and reduces the power transmission link to improve the transmission efficiency, and eliminates insufficient power when a three-phase asynchronous motor is used as an oil pumping unit, so as to achieve the purposes of energy conservation and consumption reduction.

The invention discloses a connection device with a grounding connector for an electrical distribution box. The connection device comprises a connection terminal, wherein an electrical appliance connector capable of being connected with an electrical appliance terminal in the electrical distribution box is arranged at one end of the connection terminal; a lead wire connector capable of being connected with a cable is arranged at the other end of the connection terminal; a cylindrical grounding connector is also vertically arranged in the middle of the connection terminal; a grounding connector insulating housing is also arranged outside the grounding connector; one end of the connection terminal is connected with a cable terminal stud bare wire through the lead wire connector and the other end is connected with the electrical appliance terminal in the electrical distribution box through the electrical appliance connector when the connection terminal is used; and the grounding connector is connected with a grounding wire, so that connection between the cable and the grounding wire is achieved; the connection device is simple in structure, easy to process, simple and convenient to install and dismantle, good in safety and high in universality; and the grounding efficiency can be greatly improved.

The invention relates to a grounding transfer wire clamp and a wire grounding structure. The grounding transfer wire clamp comprises a clamping mechanism, an erecting mechanism and a mounting mechanism, wherein the clamping mechanism is used for clamping a wire; the erecting mechanism comprises an erecting ring, and the erecting ring sleeves the periphery of the wire and is used for erecting of agrounding wire; and the mounting mechanism is used for mounting the erecting ring on the clamping mechanism and can enable the erecting ring and the clamping mechanism to be conducted. The wire grounding structure comprises a wire, a grounding wire and a grounding transfer wire clamp. Due to the arrangement of the erecting ring, when the wire needs to be grounded, the clamping mechanism clamps thewire, one end of the grounding wire is erected on the erecting ring, grounding operation of the wire is realized, the structure is simple, the operation is convenient, and the grounding efficiency ishigh; due to the arrangement of the annular erecting ring, an electric field at the grounding position is uniformly distributed along the annular erecting ring, grounding is ensured to be safe and reliable, the grounding wire can be erected from multiple angles due to the annular erecting ring, and the erecting position selection perplexity brought by limitation of the grounding space can be avoided.

The invention discloses a composite electricity testing grounding device and an overhead line system electricity testing grounding control system. The device comprises an installation bracket, a driving device and an electricity testing grounding rod assembly, wherein the electricity testing grounding rod assembly comprises a first insulating rod, a grounding knife, a detector and a metal rod, thedriving device is connected with the rear end of the first insulating rod and is used for driving the first insulating rod to swing, the grounding switch and the detector are both arranged at the front end of the first insulating rod, the front end of the metal rod is located on the opening side of the grounding switch when the metal rod is in a free state, and the opening side and the metal rodare arranged side by side in the extending direction of an overhead line system. The system is based on the device. By adopting the device and the system provided by the scheme, electricity testing and grounding intellectualization and automation can be realized conveniently, electricity testing and grounding equipment can be integrated, electricity testing and grounding are completed in a continuous action process, and compared with the prior art, the device and the system have the characteristics that electricity testing and grounding are completed more reliably and safely.