RU2290851C1 - Protective shield - Google Patents

Abstract

FIELD: individual protection means, in particular, protection of open parts of individual's chest, neck, head, face and breathing organs from radiant and convective heat flows, more particular, protective facilities for heat and other specialists of metallurgical industry working under elevated temperature conditions.

SUBSTANCE: protective shield has leather collar with fastener at its rear side, and transparent screen equipped with members for retaining and adjusting its position on collar. Leather collar is covered with fire-resistant heat-reflective fabric. Transparent screen is made in the form of parabola and is manufactured from thermally stable glass with heat- and light-reflective deposition.

EFFECT: increased efficiency in protecting of individual's open parts of chest, neck, head, face and breathing organs from radiant and convective heat flows, and provision for creation of safe and comfort working conditions.

2 dwg

Description

The invention relates to personal protective equipment, in particular for protecting the exposed parts of the chest, neck, head, face and respiratory system from radiant and convective heat fluxes, and can be used by thermists and other metallurgical workers under conditions of high heat exposure.

Known protective shield (see. Directory-directory. Personal protective equipment working at the factory. Edited by VN Ardasenov. M., 1988, pp. 125-126), designed to protect the eyes and face from the blinding light brightness and from exposure to infrared radiation. The shield is recommended for use with blast furnaces and heating furnaces. The shield consists, in particular, of a mesh screen, a movable glass holder with light filters, an adjustable head-mounted mount.

The disadvantage of this protective shield is that it does not protect against rising convective heat fluxes that fall under the shield screen from below and affect the exposed parts of the chest, neck and head, as well as the respiratory system. Direct heat fluxes are not completely delayed by the mesh screen.

The closest in technical essence and the achieved result to the claimed invention - the prototype is a protective shield (see L.A. Gaeva. Personal protective equipment for eyes and face in production. Ed. 2nd. M.: Mechanical Engineering, 1980, p. 125 -126), designed to protect the eyes and face from excess heat when working with rolling mills and heating furnaces. The shield consists, in particular, of a screen made of transparent plexiglass and coated with a brass mesh with a filter installed in it. The screen can be adjusted according to the angle of inclination and is fixed on the headrest with screws in the desired position. The visor effectively protects the face and eyes from radiant energy and direct heat fluxes.

The disadvantage of this protective shield is that it does not protect against ascending heat fluxes that fall under the shield screen from below and affect the exposed parts of the chest of the neck and head, as well as the respiratory system.

The objective of the invention is to increase the effectiveness of protecting the open parts of the chest, neck, head, face and respiratory system from radiant and convective heat fluxes, creating safe and comfortable working conditions in an environment of high heat exposure.

The problem is solved due to the fact that in the well-known protective shield containing the mounting device and a transparent screen, adjustable in angle and fixed with screws in the desired position, according to the claims, the mounting device is made in the form of a leather collar covered with fireproof heat-reflecting fabric, with a back closure, with elements of fixation and adjustment of the position of the transparent screen, the junction of the transparent screen and the collar is sealed with a fire-resistant heat-reflecting fabric, and the transparent screen has a parabolic shape mu, covered with heat and reflective dusting and equipped with elements for fixing and adjusting its position on the collar.

The specified set of features is new, unknown from the prior art and solves the problem, since the presence of a leather collar covered with a fire-resistant heat-reflecting fabric, tightly fitting the chest, allows you to reliably protect it from heat, a protective seal in the form of a strip of fire-resistant heat-reflecting fabric pasted on the lower edge of the transparent screen and the adjacent part of the collar, eliminates the penetration of hot air into the gap between them, the parabolic shape of the transparent screen is well streamlined It doesn’t create turbulence and stagnation of hot air, the heat and reflective spraying of the protective shield reflects a large part of the radiant energy, which generally reduces the heat load on all parts of the head and respiratory organs of the person, the lower mount of the screen eliminates the ingress of upward heat flows on exposed parts of the neck and head. The screen mount on the collar, unlike the mount on the headgear, allows you to unload your head and makes work in the shield more comfortable.

The invention is illustrated by drawings, where:

figure 1 shows a man equipped with a protective shield;

figure 2 shows a protective shield.

The protective shield consists of a leather collar 1 covered with a fire-resistant heat-reflecting fabric 2, with a clasp 3, a transparent screen 4 having a parabolic shape and made of heat-resistant glass with heat and reflective spraying 5, a seal 6, glued to the bottom of the screen 4 and the adjacent part the collar 1, the fixing and adjusting device 7, consisting of two pairs of loops 8, mounted on the collar 1 and the screen 4, and two clamping screws 9.

The protective shield is used as follows. The collar 1 is put on the shoulders, the wings of the collar are connected with a button clasp 3. The screen 4 is installed in the optimal, convenient position for work, and fixed with screws 9.

Thus, the use of this protective shield allows you to effectively protect the chest, neck and head from radiant and convective heat fluxes and creates safe and comfortable working conditions.

Claims (1)

A protective shield containing a fastening device and a transparent screen, adjustable in angle and fixed with screws in the desired position, characterized in that the fastening device is made in the form of a leather collar covered with flame-retardant heat-reflecting fabric, with a fastener at the back, the junction of the screen and collar is sealed with fire-resistant heat-reflecting fabric, the transparent screen has a parabolic shape, is covered with heat and reflective spraying, and the fixation and adjustment elements of the screen are located on the collar.

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