RU2276570C1 - Protective clothing for operation under voltage and in electric field of commercial frequency voltage - Google Patents

Abstract

FIELD: protective clothing for individual protection of personnel operating on electric equipment from effects of high and superhigh voltage and electric field of commercial frequency voltage.

SUBSTANCE: protective clothing for operation under voltage and in electric field of commercial frequency voltage has vest with veil, overalls, cover for helmet, gloves made from current-conductive fabric, and shielding shoes connected by galvanization with one another through current-conductive contact leads. Vest, overalls and shielding shoes are formed three-layered. Upper layer of vest, overalls and shielding shoes is made from oil and gasoline resistant, watertight and soil resistant material, middle layer is made from current conductive material provided with double-layered current conductive coating thereon, said coating being uniformly deposited by galvanization process, and inner layer is made from cotton fabric. Current conductive silvered tapes are additionally provided on middle layer and connected therewith by galvanization, and current conductive contact leads of vest, overalls and shielding shoes are connected with middle layer and drawn outside through loops provided in inner or outer layer of clothing.

EFFECT: increased efficiency and enhanced reliability in protecting of personnel operating on electric equipment from effects of high and superhigh voltage and electric field of commercial frequency voltage.

2 cl, 5 dwg

Description

The invention relates to labor protection and safety in the energy sector and is intended for individual protection of personnel serving electrical installations from the effects of high and ultra-high voltage (including work carried out under operating voltage), as well as an electric field of industrial frequency.

Known protective clothing for working under voltage and in an electric field of industrial frequency, containing a jacket with a hood, bib suit, helmet, gloves made of electrically conductive fabric and shielding shoes galvanically connected to each other by means of electrically conductive straps (USSR Author's Certificate No. 1105180, class A 41 D 13/00, 1982).

The fabric used in well-known protective clothing consists of intertwined metal threads, while its checkered structure does not allow to achieve high electrical conductivity. Such fabric is hard, dense, heavy, and there is poor electrical contact between the threads. Metallized threads easily break when the fabric is wrinkled repeatedly during wear, which leads to a decrease in its electrical conductivity. As a result, the well-known structural embodiment of protective clothing for working under voltage and in an electric field of industrial frequency does not provide reliable and effective shielding of a person from exposure to ultra-high voltage (including work carried out under operating voltage) and an electric field of industrial frequency.

In addition, in the process of work, a person is forced to be in protective clothing for a long time, hence the increased requirements for its hygienic and operational properties - wear, air permeability, softness of the fabric, its heat-insulating properties. In the case of using well-known clothing for personal protection from the effects of an electric field of industrial frequency, the required level of performance is unattainable.

The objective of the proposed technical solution is to increase the efficiency of protecting a person from the effects of ultra-high voltage (including work carried out under operating voltage) and the electric field of industrial frequency while improving its operational properties.

The technical result of this invention is to increase the electrical conductivity of protective clothing for working under voltage and in an electric field of industrial frequency, increasing the shielding coefficient and uniform distribution of potential over the entire area of the clothing while improving its operational properties, namely breathability, thermal insulation properties, lightness, ductility, fire resistance .

This task is achieved by the fact that in protective clothing for working under voltage and in an electric field of industrial frequency, containing a jacket with a hood, semi-overalls, a helmet, gloves made of electrically conductive fabrics and shielding shoes galvanically connected to each other by means of electrically conductive terminals, a jacket, bib overall and shielding shoes are made of three layers, while the upper layer of the jacket, semi-overalls and shoes are made of oil and water resistant and dirt-repellent material, the middle layer is of an electrically conductive material with a uniformly distributed double-sided electrically conductive coating galvanically applied, and the inner one of cotton fabric, in addition, silver plated tapes are additionally galvanically connected to it on the middle layer, and the conductive contact leads of the jacket, overalls and shielding shoes are connected to the middle layer and displayed out through loops in the inner or outer layer of the corresponding layer of clothing. In this case, protective clothing for working under voltage and in an electric field of industrial frequency can be additionally equipped with a protective helmet and a shielding net installed on the helmet with a removable holder.

Figure 1 presents protective clothing for working under voltage and in an electric field of industrial frequency, front view; figure 2 is the same, rear view; figure 3 is a shielding jacket, front view; figure 4 - shielding semi-overalls, front view; figure 5 - protective helmet with a removable folding screen for the face.

Protective clothing for working under voltage and in an electric field of industrial frequency contains a jacket 1 with a hood 2, semi-overalls 3, a helmet 4, gloves 5 made of electrically conductive fabric and shielding shoes 6 (figure 1).

Jacket 1, bib overalls 3 and shielding shoes 6 (Fig. 1) are made of three layers, while their upper layer is made of oil and water resistant and dirt-repellent material, the middle layer is made of an electrically conductive material with a galvanically applied uniformly distributed double-sided electrically conductive coating, and the inner one is made of cotton fabric.

All the conductive elements of the kit in galvanic operation are connected to each other using electrically conductive contact leads 7 and elongated contact leads 8. Electrically conductive contact leads 7 of jacket 1, overalls 3 and shielding shoes 6 and elongated conductive contact leads 8 of jacket 1 are connected to the middle layer of the corresponding element of the set by means of at least two rivets and brought out through loops in the inner or outer layer of the corresponding element of clothing. For reliable connection of the elements of the kit, the electrically conductive contact leads 7 and the elongated conductive contact leads 8 at the free end have, for example, half rings 9 and / or buttons 10, which are also made of electrically conductive material.

On the middle layer of protective clothing, silver-plated tapes are additionally installed - channels of increased conductivity (not shown in the drawing), which are galvanically connected to the middle layer of the corresponding element of the kit by means of electrically conductive contact leads 7 and elongated conductive contact leads 8.

Such galvanic connections of all the conductive elements of the protective clothing set in working condition provide reliable electrical contact and low electrical resistance during the passage of bias current and surge current through protective clothing, bypassing the human body.

Protective clothing can be additionally equipped with a protective helmet 11 and a shielding mesh 12 for the face mounted on the protective helmet 11 using a removable holder 13 (Fig. 5). Shielding mesh 12 for the face is used only during work performed by a specialist under voltage on the wires of the disconnected power lines.

The jacket 1 is made with a central zipper 14, closed by a valve 15 on the Velcro fasteners 16, and is equipped with a hood 2 and a stand-up collar 17. The hood 2 is made of a shielding electrically conductive fabric, connected to the jacket 1 and equipped with a cord with clips (not shown) to tighten the hood 2 after putting it on the protective helmet 11.

On the shelves of the jacket 1, external patch pockets are provided: for example, two breast pockets 18, two side pockets 19 and two special pockets 20. The chest patch pockets 18 are closed by valves 21 on Velcro fasteners.

Special pockets 20 are intended for storage in the assembled inoperative state of conductors 22, which are fixed at one end inside these pockets and have clamps 23 at the free end. These conductors 22 with clamps 23 can be used during operation, for example, for grounding.

The elongated electrically conductive contact leads 8 are mechanically fixed at one end on the middle layer of the jacket 1 and galvanically connected to it, and at the other free end they have buttons 10 for connecting to bib overall 3 and a patch 24 of red fabric. Stripes 24 are intended to warn the user about undocking the elongated conductive contact leads 8 of the jacket 1 with the conductive contact leads 7 fixed to the jumpsuit 3, and therefore, the loss of galvanic connection between the jacket 1 and the jumpsuit 3. In this case, stripes are visible from under the jacket 1 24. On the inner layer of the shelves of the jacket 1 there are through loops (not shown in the drawing) for outputting elongated electrically conductive contact leads 8.

The back 25 of the jacket is made with a yoke 26, while the vent holes 27 are located in the seam of their connection (Fig. 2).

The jacket 1 at the waist is fitted with an elastic cord 28. The shoulders of the jacket 1 are lowered, the sleeves 29 are set-in with the elbow pieces 30 and cuffs 31 on the Velcro fasteners (Fig. 3). Under the armholes of the jacket 1 there are ventilation holes (not shown in the drawing).

At the level of the hood 2, a pin 7 is fixed with buttons 10 for galvanic connection of the jacket 1 with the helmet 4 (figure 1).

Bib overalls 3 (figure 4) is made with two patch volume pockets 32 above the side seams. Clasp 33 overalls - two-way "lightning". On the overall overalls 3 at the level of the knees are reinforcing pads 34 of durable dirt-repellent fabric. Straps 35 overalls are made of elastic braid and equipped with carabiners 36, with which straps 35 are connected and adjust the length.

On the bottom of the trousers of overalls 3 are elastic pants 37 (figure 4). Electrically conductive contact leads 7 with buttons 10 are provided on the front halves of the trousers of semi-overalls 3 for galvanic connection of the semi-overalls 3 with a jacket 1. On the rear side of the trousers (Fig. 2), conductive contact leads 7 with half rings 9 and buttons 10 for galvanic connection of the semi-overalls 3 with shielding shoes 6 (figure 2). The cutouts 38 in the fabric of the upper layer of the trousers provide additional contact of the middle electrically conductive layer of the overall 3 with shielding shoes 6 worn over the trousers.

Nakasnik 4, worn on a protective helmet 11, is made of shielding electrically conductive fabric and is equipped with buttons 10 for galvanic connection with the middle conductive layer of jacket 1. In working condition, nakasnik 4 is fitted with an elastic band 39 (Fig. 1).

Gloves 5 are electrically conductive. They are made of complex yarn, including silver-plated and carbonized threads, which provide conductive and shielding properties, high-strength Kevlar thread, which provides gloves strength and wear resistance, as well as cotton thread, which forms the inner hygienic layer of the glove. Cuffs 40 gloves made entirely of silver-plated thread. When put on over the cuffs 31 of the sleeves, this provides a direct galvanic connection of gloves 5 with the sleeves 29 of the jacket. To increase the reliability of this connection, the gloves 5 are equipped with electrically conductive terminals 7, which, when the gloves are connected with the sleeves 29 of the jacket, pass through the half rings 9 of the electrically conductive terminals 7, mounted on the sleeves 29 of the jacket 1, and are fixed with the buttons 10. The palm part of the gloves 5 is applied knurling of electrically conductive plastic (not shown in the drawing), which increases the coefficient of friction and increases the safety of work.

Shielding shoes 6, for example, boots, are made in three layers: the upper layer is leather with an electrically conductive sole 41, the middle layer is made of conductive fabric, and the inner layer is made of cotton fabric. The mounting of the sole 41 to the upper part of the shielding shoe 6 is combined: adhesive and nail. In the manufacture of shielding shoes 6 use a special electrically conductive adhesive. Also provided is an elastic galvanic connection of the middle layer of the shoe with the sole 41, which is not amenable to fracture. Electrically conductive contact leads 7 are mounted on the upper part of the shoe, galvanically connected to its middle layer. They provide an electrical connection of the middle conductive layer of the overall 3 with shielding shoes 6. Moreover, to increase the reliability, the free ends of the electrical conductive terminals 7 of the protective shoes 6 are passed through half rings 9 of the electrical conductive terminals 7 attached to the trousers of the overall 3 and fastened to buttons 10.

Protective clothing is worn in the following sequence.

In the initial position, unfasten the jacket 1 and semi-overalls 3. Put on semi-overalls 3, the straps 24 of which are adjustable in length and connected using carabiners 36. They put on shielding shoes 6, fasten it, connect them electrically to the trousers, using terminals 7 with half rings 9 and buttons 10 Put on a jacket 1, a protective helmet 11, throw on it a nasochnik 4, fasten the central fastener 14 of a jacket 1 and cuffs 31 of sleeves.

Next, the jacket 1 is electrically connected to semi-overalls 3, a shoulder pad 4 and gloves 5 with the help of electrically conductive contact leads 7 and elongated conductive contact leads 8.

After performing all of the above operations, protective clothing is in working condition.

Protective clothing is removed in the reverse order.

The proposed protective clothing for work under voltage and in an electric field of industrial frequency is a universal means of protection from the harmful effects of all electromagnetic factors created by the electrical equipment of substations and power lines with voltage up to 1150 kV AC, except for magnetic fields with a frequency of 50 Hz. It is intended for use in works performed both on the ground potential and on the potential of wires that are not disconnected by overhead AC power lines with voltage up to 1150 kV inclusive, including during repair work on disconnected and grounded equipment.

This protective clothing provides high efficiency of protecting a person from exposure to high and ultra-high voltage (including work carried out under operating voltage) and the electric field of industrial frequency by increasing the electrical conductivity of protective clothing for working under voltage and in the electric field of industrial frequency, increasing the shielding coefficient and uniformity of distribution potential over the entire area of clothing while improving its operational properties, namely breathability, heat-insulating properties, lightness, ductility, fire resistance.

It provides protection against the following harmful and dangerous factors: electric field; bias current flowing through the human body when it is in an electric field; pulse current (discharges) when touching grounded or insulated objects, parts of equipment, as well as grass and small bushes; intense electromagnetic radiation in a wide range of radio frequencies generated by a corona discharge, as well as arising from a discharge between the contacts of disconnectors, especially when they disconnect unloaded transformers and power lines; possible electric injury when working in the induced voltage zone, air ions, especially heavy ones (aerosols).

The shielding coefficient of the proposed protective clothing at a frequency of 50 Hz is generally not less than 60 dB. The resistance of the jacket and overalls is not more than 10 Ohms, the resistance of gloves is not more than 30 Ohms, the resistance of boots is not more than 500 Ohms.

The design of the proposed protective clothing is quite simple and technologically advanced, which will make it possible to manufacture the product using standardized processing methods on standard equipment.

Claims (2)

1. Protective clothing for working under voltage and in an electric field of industrial frequency, comprising a jacket with a hood, bib suit, helmet, gloves made of electrically conductive fabric and shielding shoes, galvanically connected to each other by means of electrically conductive contact leads, characterized in that the jacket, bib overall and shielding the shoes are made of three layers, while the upper layer of the jacket, semi-overalls and shoes is made of oil and water resistant and dirt-repellent material, the middle layer is made of electrical wire material with a galvanically applied, evenly distributed double-sided electrically conductive coating, and the inner one is made of cotton fabric, in addition, electrically conductive silver-plated tapes galvanically connected to this layer are additionally installed on the middle layer, and the conductive contact leads of the jacket, bib overall and shielding shoe are connected to the middle layer and brought out through the loop in the inner or outer layer of the corresponding layer of clothing. 2. Protective clothing for working under voltage and in an electric field of industrial frequency according to claim 1, characterized in that it is additionally equipped with a protective helmet and a shielding net mounted on the helmet using a removable holder.

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