Method of articles with insulating surfaces protecting against electrostatic hazard

FIELD: electrical engineering.

SUBSTANCE: invention relates to methods of articles with insulating surfaces protecting against electrostatic hazard with earthed or scattering electrically conducting circuits, forming cellular structure, and can be used in gas, oil, petrochemical, chemical, food, grain-processing, machine building industries in occupational safety and fire-explosion safety fields. Protective cells satisfy criterial values, arising from requirements for ensuring safety when handling with media, products or facilities with known sensitivity to electrostatic exposures: electrostatic conductive discharging and static electricity discharges. Their geometrical parameters are functionally set depending on parameters, describing insulating surfaces electrostatic properties and parameters of their electrostatic charging processes. Protective efficiency by earthed or scattering electrically conducting circuits making cellular structure, also depends on which side of product wall they are placed, since in case of strong electrization of their efficiency is guaranteed only, if they are placed on side of surface, directly subjected to electrostatic charging.

EFFECT: wherein, when surface is subjected to electrostatic charging by process medium, parameters of protective cells are determined by parameters of electrostatic properties of surface bordering with process medium and subjected to action of electrostatic charging processes arising at its interaction with said medium.

1 cl, 6 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: in a protection device of a liquid-propellant engine against static electricity, which includes conductive paths attached by means of screws and nuts with one end to installation elements on housings of pyro valves and with the other end to bosses on the engine frame, pyro cartridges screwed into pyro valves, earthing bosses on the frame, earthing conductors, in which according to the invention, between the threaded part of pyro cartridges and the mating thread of a pyro valve seat, a thread on the pyro valve body and a thread of a tube of a start-up ampoule of the gas generator, as well as in places of attachment of the paths and earthing there applied is current-carrying enamel reducing active resistance of an electric circuit and serving at the same time as a locking device of threaded connections, to structures of pyro valve assemblies there connected are pipelines to which electrical jumpers are fixed, which are connected to the engine frame by means of fasteners; on a transverse tie member of its frame there arranged are bosses with earthing conductors connected to them.

EFFECT: improving reliability of electrical circuits for removal of electrostatic electricity from a pyro device.

3 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: device comprises a source of static electricity (1), at which surface the measured high voltage is generated, a discharge element (2) connected in series with the primary winding (3) of the matching transformer (4) having the first (5) and second (6) outputs, the secondary winding (7) of the matching transformer (4) having the first (8) and second (9) outputs, at that its first output (8) is coupled through a rectifying element (10) with the first outputs of the storage capacitor (11) and a load circuit (12) while the second output (9) of the secondary (7) winding of the matching transformer (4) is coupled to the second outputs of the storage capacitor (11) and the load circuit (12). The source of static electricity (1), at which surface the measured high voltage is generated, is coupled to the discharge element (2) through a high-ohm resistor (13), t a common unit of the high-ohm resistor (13) and the discharge element (2) is connected to the first output of an auxiliary capacitor (14), which second output is connected to the second (6) output of the primary winding (3) of the matching transformer (4); the self-contained object monitoring system is used as the load circuit and the above system comprises a radio transmitter (12), which main modulating input (15) is coupled with the first (8) output of the secondary (7) winding of the matching transformer (4), and a radio receiver (16) comprises a receiver of radio signals (17), which first (18) output is coupled to the input of the meter (19) metering time intervals between pulses at the secondary (7) winding of the matching transformer (4), which depend on the value of the measured high voltage of static electricity.

EFFECT: remote measurement of high voltage generated at the surface of a polymer and other material accumulating static discharge and arrangement of the micropower supply monitoring system for mobile objects of different class by energy of the same static electricity.

2 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production and transportation of oil. Invention aims to increasing reliability and efficiency of electrostatic charges by placing discharge electrode in neutralisation chamber and increasing the area of contact with fluid flow. Proposed device comprises discharge electrode to be mounted at pipeline with the help of flange joint. In compliance with this invention, pipe inner surface is lined with polyethylene. Bolts joints of the flanges are isolated by polyethylene sleeves. Discharge electrode composed by toothed ring is arranged between flanges and connected via drain cable secured to said ring with grounding device.

EFFECT: decreased electrostatic potential distributed over oil pipeline inner surface and corrosion of metal pipes.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to substrate-free conducting surface coat and method of its production. Proposed surface coat includes central layer consisting of the particles produced mincing of said sheet. Said particles are sintered particles embedded in polymer matrix. Said particles and/or said polymer matrix contain conducting material. Proposed method comprises the steps that follow. a) Sheet mincing to produced said particles. b) Making the polymer-based powder for polymer matrix. c) Application of said particles on moving belt carrier. d) Application of said polymer-based powder on said particles. e) Heat treatment and compaction of said particles and said polymer-based powder at the press.

EFFECT: substrate-free surface coat with antistatic properties.

17 cl, 5 tbl, 10 dwg, 19 ex

FIELD: physics.

SUBSTANCE: method involves forming a stream of charged aerosol, accumulating electric charge in a retarded flow in form of a charged cloud to a value when magnetic field strength in the "cloud-facility model" space is sufficient to generate leader discharge, recording the number of discharges falling on the facility and the lightning rod and making a decision on lightning protection of the facility. A three-field cell of a thunder cloud is formed by feeding a positive charge, then a negative charge and then a positive charge again. The apparatus has a location imitator (1), a model (2) of the facility, a model (3) of the lightning rod, a thunder cloud imitator in form of a generator (4) of a charged aerosol jet, which is connected to an alternating-sign power supply (5), which is able to control amplitude and duration of output current, a photographic camera (6) connected to a computer or current shunt (7), through which the model (3) of the lightning rod is connected to the location imitator (1). The ratio T+/T of the duration of the positive and negative polarities and the ratio I+/I of the amplitude of the positive and negative polarities of the alternating-sign power supply (5) can vary from 0.1 to 2; the sum T++T can vary from 0.1 to 10 s and the interval between series of pulses is not shorter than 1 s.

EFFECT: artificial cells of a cloud thunder approaching natural thunder clouds and high accuracy of creating conditions for lightning.

2 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: suggested device for reduction of a pipeline corrosion rate by means of electrostatic charge removal consists of a body mounted at the pipeline by means of a flange connection with a discharge electrode installed in it in the form of needles; according to the invention discharge electrodes are made as a screw, bushings and needles of chrome-nickel steel; they protrude from polyethylene isolation into emulsion flow, they are installed radially in three rows at the angle of 45 degrees and clamped by steel semi-rings and electrostatic charges are carried off through a drain cable to the ground conductor.

EFFECT: increase in performance, reduction in redistribution of electrostatic charges between the pipeline and oil, reduction of the pipe steel corrosion.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: suggested device for neutralisation of electrostatic charges consists of a body mounted at the pipeline by means of a flanged connection with the discharge electrode in the form of metal strings is installed inside this flange; according to the suggested invention the discharge electrode is installed perpendicular to motion of the flow of water-oil mixture and it is made as a ring with copper strips and rod forming a screen; herewith the rod is installed so that it matches a groove for flanges, at that the rod is isolated by a polyethylene bushing and connected to a drain copper cable and the ground conductor.

EFFECT: lesser overall dimensions of the device due to simplification of its design; increase in performance, reduction of electrostatic charges redistribution between the pipeline and oil.

2 dwg

FIELD: physics.

SUBSTANCE: in the apparatus for metal coating mobile structural elements, the electric connection of the apparatus is in form of a metallic spiral or is provided with bushings which are encircled by the metallic spiral on both the side of the mobile or fixed structural elements, wherein outer surfaces of the end windings of the spiral are pressed by slit walls, together with which the bushings and the metallic spiral are rigidly attached to attachment points, and the ends of the metallic spiral are rigidly connected by electroconductive material to the attachment points.

EFFECT: possibility of using the apparatus for metal coating mobile structural elements in a wide range of types of deformations of an electroconductive element.

4 dwg

FIELD: electricity.

SUBSTANCE: one draws incoming current charges into the lightning interceptor and retains them there; the lightning interceptor is connected (via a current tap) to the central vertical electrode of the grounding conductor that diffusely irradiates currents through V-shaped electrode tips; then one proceeds with induction and uniform spread of charges on the inner and outer surfaces of the lightning interceptor shell; the lightning interception rod is designed in the shape of a sphere, cope or cone around which a volume charge of the electric field (counteracting the identical polarity downward leader stroke from the above) is generated that creates a repulsive force changing the leader stroke direction towards the lightning discharger trap located outside the area being protected that initiates an upward charge flow. The top of the grounding conductor is shaped as a cope while the bottom is buried into metal grid. The central electrode is connected to the other vertical and horizontal electrodes having V-shaped tips. The external vertical electrodes are connected to buses forming the circuit of the area being protected.

EFFECT: improving protection reliability and efficiency.

2 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: suggested device for use of electrostatic field energy includes contact element and grounding circuit with included rectifier bridge that provides use of energy of electrostatic charges generated at surface of materials in result of their natural static-charge accumulation. Suggested device for use of electrostatic field energy can serve both for accumulation of electrostatic field energy and for direct supply of electricity consumers at that providing improved electrostatic safety of environment.

EFFECT: use of energy of electrostatic field generated in result of natural electrisation of materials, for example for the purpose of battery charging, and enhancement of functionality of systems providing electrostatic safety.

2 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to device used to protect construction members of plants in process of reconditioning. According to invention, to provide protection of gas-turbine plant when repairing by welding of defects, prior to repairing current-carrying rod is fitted in hatch hole of plant compressor inner housing to provide contact of its spherical end with parts of compressor rotor, and by means of clamp and current-carrying element, rod is connected to grounded element of plant stator. In process of welding up defects, for instance of scroll, current-carrying rod thrusting by its spherical end against parts of rotor, for instance, against bushing of compressor rotor, and connected by clamp and current-carrying element with grounded stator or frame, provides equalizing of electric potentials of rotor and stator of gas generator, thus preventing burning through of antifriction bearings in place of electric contact. Current-carrying rod can be coated with layer of soft metal with low specific resistance.

EFFECT: protection of plant from damage of antifriction bearings by equalizing electric potential of rotor and stator.

2 cl, 2 dwg

FIELD: radio electronics; eliminating detrimental effect of static electricity by means of ground connections.

SUBSTANCE: proposed electrostatic charge removing device has insulating case accommodating resistor, ground conductor contacting part under investigation, insulating cover that follows shape of butt-end part of case and is attached thereto, and connecting unit attached to conductor loose end; one lead of resistor is connected to ground conductor and other one, to unit contacting part under investigation; case is made in the form of rectangular parallelepiped, cylinder, or prism by pouring insulating material into mold holding resistor placed thereto in advance and connected to device. Cover is provided with additional holes receiving contacts in the form of conducting wires which form unit contacting part being investigated; each of mentioned contacts is installed by its insertion in one of holes provided on external side of cover followed by its drawing and bringing out through adjacent hole of cover on its internal side to ensure interconnection of all contacts on internal side of cover and also its connection to one of resistor leads.

EFFECT: enlarged functional capabilities, enhanced operating efficiency and reliability of device.

8 cl, 1 dwg

FIELD: machine operation technology, in particular, technology for grounding charges of static electricity from movable objects, such as vehicles.

SUBSTANCE: method for lifting static electricity from body of vehicle includes making a metallic fastening element, rigidly connecting a current-conductive element in form of metallic wire to it, affixing the fastening element with wire in transfer mold with recess, forming a shape of ribbon with prominent end of current-conductive element. Assembled transfer mold is moved to injection-molding machine with preliminarily heated plasticized polyvinylchloride, which is then poured into transfer mold under pressure and cooled down.

EFFECT: lifted static electricity, preserved shape and flexibility of product.

FIELD: measuring techniques.

SUBSTANCE: in the region of a cow stall, metallic electrodes are electrically connected to metal structures accessible to animals. The electrodes are made in form of two steel discs for each animal. The first disc-electrode is placed 0.2-0.3 m from the front of the stall to the centre of the disc, while the second is at 1.8-2.1 m from the front of the stall to the centre of the disc. The first disc-electrode has an electrical connection to a metallic construction, with which the animals can come into contact. The second disc-electrode is joined by the same steel bar to an angle steel of a conveyor. The disc-electrodes have thickness of not less 2.5 mm and not more than 3.0 mm and diameter of not less than 3.5 cm and not more than 4.0 cm.

EFFECT: increased reliability of the system of electrical protection of animals on farms.

2 dwg

FIELD: instrument making.

SUBSTANCE: device incorporates plastic casing, end face metal rings, discharge metal strings fastened with the help of springs on the aforesaid end face metal rings. Note that the device comprises also a stator with distributed three-phase winding and DC micro-generator with its positive terminal connected to the discharge metal and its negative terminal connected to the input metal branch pipe.

EFFECT: reduced amount of electrostatic charges.

2 cl, 2 dwg

FIELD: electrics.

SUBSTANCE: invention concerns instrument engineering and can be applied in electrostatic charge tap-off from flow of oil or other liquid hydrocarbons. To achieve effect, three-phase stator is used to create rotating magnetic field and additional stationary electric field between metal inlet pipe and metal discharge hangers.

EFFECT: extended functional capacities.

1 dwg

FIELD: power engineering.

SUBSTANCE: invention refers to environmentally safe renewable electric power engineering. Around metal lightning protector connected to the earth there arranged is a stator toroid-receiver of impact excitation, which is the part of high-Q circuit consisting of stator toroid-receiver, working inductivity and capacitor tuned to frequency, namely of industrial network, which are in-series connected, and energy is taken from the above circuit for standard AC electric motor power with transformer of the current passing in resonance circuit of impact excitation; at that, electric motor is connected to the secondary winding of the current transformer as per the series resonance scheme in which standard power supply voltage of industrial electric motor is maintained automatically, when the voltage in the main circuit is changed, with the control by changing electric capacity of the capacitor, and industrial electric motor is connected to devices of direct mechanical work or energy storage. The circuit that received impact excitation is changed over to the non-operating state in order to eliminate negative aftereffects of the repeated lightning stroke, and the other similar circuit is changed over from the non-operating state to the operating one. Resonance frequency is 50 Hz or 400 Hz or in accordance with specific need. Throughout the height of the lightning protector there installed in lowering direction are several similar lightning energy utilisation devices.

EFFECT: lightning energy utilisation method is described.

7 cl, 4 dwg

FIELD: instrument making.

SUBSTANCE: flexible electroconductive element is embraced with metal spiral, inner diametre of which equals width of metal braiding. Ends of metal spiral are arranged in the form of hooks and are fixed together with tips of electroconductive element on movable elements of structure. At the same time electroconductive element is rigidly connected to spiral in points of connection to tips.

EFFECT: reliability improvement.

4 dwg

FIELD: mechanics.

SUBSTANCE: device comprises plastic body, end metal rings, discharge metal strings - electrodes, stator, terminals, input and output metal nozzles, negative terminal of valve asynchronous DC microgenerator, battery of capacitors, rectifier, positive terminal of valve asynchronous self-exciting microgenerator, rheostat, primary motor, flange, pipe (18), step-down transformer (19), contact of dewaxing unit start-up relay (20), control rheostat (21) and relay-contactor control circuit.

EFFECT: neutralisation of charges and efficient removal of asphalt-paraffin deposits from discharge electrodes.

2 dwg

FIELD: electricity.

SUBSTANCE: suggested device for use of electrostatic field energy includes contact element and grounding circuit with included rectifier bridge that provides use of energy of electrostatic charges generated at surface of materials in result of their natural static-charge accumulation. Suggested device for use of electrostatic field energy can serve both for accumulation of electrostatic field energy and for direct supply of electricity consumers at that providing improved electrostatic safety of environment.

EFFECT: use of energy of electrostatic field generated in result of natural electrisation of materials, for example for the purpose of battery charging, and enhancement of functionality of systems providing electrostatic safety.

2 dwg

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