RU2101050C1 - Respirator - Google Patents

Abstract

FIELD: devices for protecting individual's respiratory organs from aerosols and dust hazardous for individual's health. SUBSTANCE: respirator has replaceable filtering member and reusable extractor. Filtering member is made in the form of hemisphere with tray-shaped obturator extending along its perimeter. Filtering member is attached to extractor by means of two semicircular beads. Extractor has ring composed of plastic tape and aluminum arced strip, which are connected one with another. Shape of ring allows ring inner surface to adhere to obturator along its length. Plastic portion of ring is provided with four arced slots for fastening two flexible cords and two T-shaped slots for fastening filtering member. Slots are positioned in diametrically opposed points of ring and in symmetry with aluminum strip serving as nose squeezing plate. To employ respirator, user places replaceable filtering member into extractor, inserts filtering member beads into T-shaped slots of extractor, puts lower flexible cord on neck, applies filtering member to face so that nose squeezing plate lies onto bridge of nose, with chin being in lower part of filtering member, puts on upper flexible fastening member onto nape of neck and squeezes nose plate in accordance with nose shape. Optimum adjoining of filtering member to face is provided by adjusting length of fastening members in arced slots of extractor. EFFECT: increased efficiency and simplified construction. 3 dwg

Description

 The invention relates to personal protective equipment for respiratory organs from substances harmful to human health in the form of aerosols and dust, as well as to light respirators and can be widely used in industry, agriculture and everyday life.

 Known for lightweight respirators in the form of a half mask made of filter materials with fastening elements of the respirator to the face, connected to the half mask with one-piece textile or welded seams. So, for example, the lightweight respirator ШБ-1 "Petal" is widely known, which is attached to the face with the help of braid tied to a filter / 1, p. 79 /.

 For fastening on the face of the whole-formed respirators RPF "Julia", RPF-1, elastic (rubber) cords are used that are inseparably connected to the half mask using paper clips or in another way. The tightness of the half masks on the bridge of the nose is ensured by a metal crimp plate connected to the half mask also by an integral method / 1, p. 85 /.

 The disadvantages of these respirators include the low manufacturability of their manufacture, uneconomical use of materials, leading to additional unjustified environmental pollution during waste disposal.

 The closest in technical essence to the proposed device is a respirator containing a removable volumetric filter element, molded with a grooved welt, in which a flexible annular elongation of elastic material is fixed, crimped along the contour of the obturation and having means for attaching elastic cords / 2 /.

 In this respirator, the above disadvantages are eliminated, but the design of the allonge and the method of its connection with the half mask do not provide reliable sealing along the obturation strip.

 The aim of the invention is to increase the tightness of the obturation strip, to increase the reliability of fastening the half mask to the allge while preserving the advantages of the molded respirator in terms of the manufacturability of its manufacture and the economical use of materials.

 This goal is achieved by the fact that the elongation is made of two strips of elastic material and metal bonded to each other, has T-grooves for attaching a removable half mask and arcuate slots for attaching elastic holes, and on the filter element there are protrusions for mounting in the elongation.

 A feature of the invention is that the replaceable filtering volumetric hemispherical element has a grooved welt obturator to increase the tightness along the obturation strip and protrusions for attaching the replaceable element to the seal. In addition, according to the manufacturing technology, it is simple, obtained by stretching from a tape in a matrix-punch system.

 A special form of elongation is ensured through the use of a crimp nose plate in the form of an arc of a certain radius and its fastening with the ends of the plastic strip at certain angles. Thus, most of the elements of the respirator, such as the seal, crimp plate, fasteners here are reusable parts, which greatly reduces the cost of the respirator. The protrusions on the toroidal welt of the filter element are tucked into the T-slots of the elongation, which greatly facilitates the operation of the respirator and ensures the reliability of their connection.

 In FIG. 1 given a respirator on the frontal projection; figure 2 is a top view of the respirator; figure 3 view of the respirator on the profile projection.

 The respirator consists of a replaceable volumetric filtering element 1 in the form of a hemisphere with a groove-shaped welt obturator 2 and protrusions 3 for mounting in the elongation. Further, the respirator includes anonge 4, a nasal crimp plate 5 and elastic fasteners 6. The alonge is an elastic strip bent into a part of the ring, for example, of vinyl plastic or polystyrene, at the ends of which a metal nose crimp plate 5 is attached, for example, by welding, melting the Alonge material, while the Along has T-shaped grooves 8 under the protrusions 3 of the filter element 1 and slots 9 under the elastic fastening element 6.

 The respirator comes to the consumer in a box where there are several replaceable filter elements and one length with a crimp plate and elastic fasteners. The consumer inserts a filter element into the sleeve, inserts the protrusions of the replaceable filter element 3 into the T-grooves 8 of the sleeve 4, puts the lower elastic cord on the neck, applies the filter element 1 to the face so that the crimp plate 5 is located at the nose and the chin is at the bottom part of the filter element 1, puts the upper elastic cord 6 on the back of the head and compresses the nose crimp plate 5 in the shape of the nose bridge, after which the respirator is ready for use; by adjusting the length of the fasteners in the slots 9 of the length 4, they achieve an optimal fit of the filter element to the face along the toroidal welt of the obturator.

 The respirator can be used in the mining, chemical, cement, construction, woodworking industries, powder metallurgy, flour mills and sugar factories, in the production and use of synthetic detergents, etc. as well as in agriculture in the processing of grain, plowing, liming of soil and fertilizing. In everyday life, a respirator can be used for the prevention of infectious diseases, in garden plots, when cleaning apartments. In contrast to the widespread "Petal" type respirator, the proposed respirator is easy to use, because does not require preliminary preparation for use. Thanks to the presence of two elastic fasteners, the respirator is firmly held on the face, and the filter element is replaced in a few seconds. The manufacturing technology of the proposed respirator is simple, because A hemispherical filter element is obtained by stretching from a ribbon in a matrix-punch system.

Claims (1)

 A respirator containing a replaceable volumetric filter element molded with a grooved welt in which a flexible ring-shaped elongation of elastic material is placed, crimped along the obturation contour and having means for attaching elastic cords, characterized in that the elongation is made of two elastic bands fastened to each other material and metal, has T-shaped grooves for attaching a removable half mask and arcuate slots for attaching elastic cords, and on the filter element there are protrusions for mounting in the elongation.

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