RU2489184C1 - Cassette for absorbing cartridge - Google Patents

Abstract

FIELD: rescue equipment.

SUBSTANCE: invention relates to a cassette design for outfit of absorbing cartridges in the respiratory protection means. Cassette 1 for absorbing cartridge is made in the form of a roll of absorbent 3 rolled on the central tube 2 and enclosed in the shell 8. Between the coils of absorbent, a separating gauze 4 is placed. On the outer surface of the cassette 1 two annular 6 and one longitudinal 7 sealing elements are fixed. The central tube 2 is adjacent to absorbent 3 sheet, and a gauze 4 to the outer shell 8.

EFFECT: cassette provides increase of effectiveness of absorption cartridge efficiency by increasing degree of its optimisation.

5 cl, 9 dwg

Description

The invention relates to the design of cartridges for equipment of absorbing cartridges in respiratory protection.

A known cartridge for an absorption cartridge (UK patent No. 2191958, IPC АВВ 23/02; АВВ 23 / 00.1987), which includes a filter membrane made of a flexible porous sheet material and filled with particles of a carbon dioxide adsorbent, for example, soda lime, lithium hydroxide or potassium superoxide. As the flexible porous sheet material, ordinary filter paper, fiberglass, open cell foam or any non-woven textile material can be used. In the described cartridge, the adsorbent is placed between two sheets of flexible porous material, while grooves are formed in one sheet that are filled with adsorbent. Both sheets of the shell are welded together and placed in a filter cartridge.

However, this design of the cartridge is difficult to manufacture due to the need to form grooves in one of the sheets. The granular sorbent filling the grooves is characterized by an uneven density of granules due to the technology of their manufacture. This leads to a decrease in the stoichiometric characteristics of the absorber sheet, i.e. to increase the mass of the cartridge and reduce the time of the protective action.

Also known cassette according to US patent No. 5964221, IPC A62B 7/10, 1999, as an option, having a cylindrical shape. In the design, the absorber sheets are made using a binder and a plasticizer and are arranged spirally in the cassette (i.e. in the form of a sequential spiral or separate rings and spiral concentric circles), between which a grid is located, and placed in a hard shell. A central tube is installed in the center of the shell (see FIG. 5 and the text of the patent relating to the description of the round version). The air flow passing through the cassette goes from bottom to top and is parallel to the spiral-bound adsorbent sheets. The air flow passes through the gap between the sheets formed by the grid.

However, this device also does not provide a high capacity for carbon dioxide due to the contact of the outer sheet with the shell, which practically does not work in the cartridge due to the lack of contact with the cleaned air. The use of solvents to remove the plasticizer during sheet forming dramatically complicates the technology of manufacturing cartridges. Another disadvantage of the known cartridge is that to seal the cartridge in the cartridge, the latter must be equipped with a shutter, while the outer layers of the cartridge adjacent to the shutter also do not absorb carbon dioxide due to lack of flow. In addition, there is no guarantee of the impossibility of reusing the used cartridge due to the lack of indication of cartridge working out, which can create an emergency.

The objective of the invention is to increase the efficiency of the cartridge.

The technical result of the invention is to increase the degree of development of the absorber sheet.

The technical result of the invention is achieved by the fact that in the cartridge for the absorption cartridge, made in the form of an absorber sheet rolled on a central tube into a roll, a separator grid between the turns of which is placed, two annular and one longitudinal sealing elements are fixed on the outer surface of the cartridge, to the central the absorber sheet adjoins the tube, and a dividing grid is attached to the outer shell.

The first coil of the absorber sheet is hermetically fixed to the central tube.

The separation grid is made biplanar.

The shell is made of optically transparent shrink film.

An alkalinity indicator has been added to the absorber sheet.

Fastening on the outer surface of the cartridge two ring and one longitudinal sealing elements, adjacent to the Central tube of the absorber sheet, and to the outer shell of the separation grid provides:

- Sealing the cartridge in the cartridge, in which the entire air flow passes between the turns of the absorber sheet;

- Mechanical connection of the ends of the separation grid;

- Adjacency to the central tube of the absorber sheet ensures the tightness of the cartridge itself, excluding air leakage in its central part;

- Adjacency to the outer shell of the separation grid allows to reduce the mass of the absorber sheet, which is not involved in the process of air purification from carbon dioxide. An obturator ring installed in the cartridge seals the cartridge at the inlet, and placing the absorber sheet in the peripheral layer of the cartridge does not make sense. This allows you to reduce the mass of the sheet of the absorber without deterioration of the cartridge;

- Ease of assembly of the cartridge and its installation in the cartridge.

All this provides an increase in the efficiency of the cartridge, primarily by increasing the degree of development of the absorber sheet. With a mass of about 1,500 g, the cassette fulfills carbon dioxide, as does the cassette of the prototype weighing 2,000 g, and at the same time, 40% of the duration of the cassette ensures complete absorption of carbon dioxide.

The tight fastening of the first coil of the spiral from the absorber sheet to the central tube ensures a snug fit to the central tube of the sheet with absorption material, eliminating the breakthrough of the cleaned air that does not react with the sheet. The tightness of the adherence of the absorber sheet to the central tube can be achieved by known methods: by using double-sided tape, by gluing using polymer melt, welding and using mechanical devices.

The use of a biplanar (two-plane) polymer dividing grid ensures accurate spacing of the turns of the absorber sheet, mechanical strength and rigidity of the cartridge, and minimal hydraulic resistance. The thermal conditions of the cartridge allow you to use polypropylene as a structural material, which does not deform when the cartridge. In addition, it is chemically resistant and does not react with the chemicals used in the cassette.

The execution of the shell in the form of a shell of an optically transparent heat-shrink film and the introduction of an alkalinity indicator into the absorber sheet ensures ease of assembly and mechanical strength of the cartridge. After working out, the cartridge changes color, so the user can see through the control window of the cartridge whether a fresh or used cartridge is in the cartridge.

The drawings show:

figure 1 is a General view of the cartridge for the absorption cartridge, side view;

figure 2 is the same as in figure 1, a top view;

figure 3 is a view of the peripheral part of the cartridge, a top view;

4 is a view of the Central part of the cartridge, a top view;

5 is a General view of the cartridge with the cartridge in the working position;

6 is a section along aa of figure 5;

Fig.7 is a General view of the cartridge in the absorption cartridge;

Fig - shows a view of the separation grid, a top view;

Fig.9 is the same side view.

The list of items indicated in the drawings:

1. cartridge for the absorbing cartridge;

2. the tube is central;

3. absorber sheet;

4. separation grid;

5. O-ring sealing element;

6. ring sealing element;

7. longitudinal sealing element;

8. shell;

9. the first coil of the spiral from the absorber sheet;

10. cartridge case;

11. control window;

12. the top cover of the cartridge;

13. inhalation fitting;

14. installation rod;

15. the bottom of the cartridge;

16. expiration fitting;

17. installation rod;

18. obturator ring;

19. supporting funnel;

20. seal.

The cartridge for the absorption cartridge 1 contains a central tube 2, on which the absorber sheet 3 is wound spirally and, starting from the second turn, a separation net 4. The absorber sheet 3 contains a spunbond enclosed in a gas-permeable shell (non-woven polypropylene material with a density of 25-50 g / m ² ) partially dehydrated paste-like absorption material based on calcium oxide hydrate with the addition of potassium alkali. The separation grid 4 is made in the form of a polymeric biplanar (two-plane) mesh made of polypropylene with a diamond-shaped mesh size of 2-2.5 mm, which provides free passage between the turns of the absorber sheet of the air mixture being cleaned from carbon dioxide. On the outer side of the cassette, ring sealing elements 5 and 6 are installed, made in the form of a tape with an adhesive surface from mounting paper tape, or from a porous polymer; a longitudinal sealing element 7 is installed along the forming cartridge, connecting the end of the separation grid to the roll part of the cartridge. A shell in the form of a shell of heat-shrink film 8 is installed over the outer mesh surface of the cartridge. The initial turn 9 of the sheet of regenerative product 3 is fixed on the central tube 2 using double-sided tape or by gluing with polymer melt, which is characterized by good adhesion to the polypropylene material and to the material central tube 2. It is also possible to use welding and the use of various mechanical devices. Cartridge 1 for the absorption cartridge is placed in a sealed package (not shown) of Terafol material, which is an aluminum foil clad on the inside with polyethylene and on the outside with lavsan. The cassette in sealed packaging can be stored either in a box or in an individual case.

The cartridge 1 is placed in the cartridge, consisting of a housing 10 made in the form of a shell with a control window 11 located on the side surface. One of the ends of the body 10 is closed by a cover 12, which is equipped with an inhalation fitting 13, and an installation rod 14 is located on the inner side of the cover. From the opposite end, the housing 10 is closed by a lower cover 15, equipped with an exhalation fitting 16, an installation rod 17, and a shutter ring 18. B covers 12 and 15 are made funnel support 19 in the form of conical shells connected by ribs to the supports of the mounting rods 14 and 17. The covers and body are sealed with seals 20.

The device operates as follows.

To equip the absorption cartridge, a sealed package is opened and cartridge 1 is removed from it. Cassette 1 with its central tube 2 is installed in the lower cover 15 on the mounting rod 17 so that the lower cut of the cartridge 1 rests on the radial plates of the support funnel 19 and is pressed against the obturator ring 18. After that, the cartridge case 10 is installed on the cartridge 1, which is screwed into the thread of the lower cover 15, while the seal 20 tightly covers the lower part of the housing 10. Then, in a similar manner, installs on the housing 10 The upper cover of the cartridge 12, which, with its mounting rod 14, fixes the central tube of the cartridge 2. The cartridge cover of the upper 12 also seals the cartridge case 10 with its seal 20. When the cartridge 1 is installed, it is sealed reliably with its ring sealing elements 5 and 6 relative to the inner surface of the housing 10.

During the operation of the absorption cartridge, exhaled air enters through the exhalation nozzle 16 into the cavity of the lower cover 15 with the support funnel 19 and enters the gaps of the spiral wound absorber sheet 3, in which the separation grid 4 is placed. Passing through the gaps formed by the separation grid 4, the air is cleaned of dioxide carbon, interacting with the absorber sheet 3, and enters the support funnel 19 in the top cover 12 and exits through the inhalation fitting 13. The process of purification of air from carbon dioxide continues until the sorption s properties of the absorber sheet 3. The cleaned air from the cavity of the cartridge cannot exit into the space between the cartridge and the cartridge due to the shell of the heat-shrinkable film 8 and the longitudinal sealing element 7. The cleaned air along the central tube 2 is prevented by the first turn of the spiral 9 of the absorber sheet 3, which is tightly attached to it The substances formed as a result of the chemical reaction of carbon dioxide absorption are non-toxic and environmentally friendly. These are potassium and calcium carbonates and bicarbonates and water formed during the reaction, most of which is trapped in the cavity of the funnel 19, which prevents it from returning to the cartridge 1. The alkalinity indicator introduced into the absorber sheet prevents the reuse of the spent cartridge 1. Through the control window 11, one can judge the possibility of using a cartridge by changing the color of the absorber sheet 3.

After the work is done, the cartridge is disassembled in the reverse order described above, the spent cartridge 1 is removed from the cartridge and disposed of, a new cartridge is installed in place of the used cartridge.

The cartridge provides an increase in the efficiency of the absorption cartridge by increasing the degree of development of the absorber.

Claims (5)

1. The cartridge for the absorption cartridge, made in the form of an absorber sheet rolled on a central tube into a roll, and a separating grid placed between the turns of the cartridge, characterized in that two annular and one longitudinal sealing elements are fixed on the outer surface of the cartridge, adjacent to the central tube an absorber sheet, and to the outer shell a dividing grid. 2. The cartridge for the absorption cartridge according to claim 1, characterized in that the first coil of the spiral from the absorber sheet is hermetically attached to the central tube. 3. The cartridge for the absorption cartridge according to claim 1, characterized in that the separation grid is made biplanar. 4. The cartridge for the absorption cartridge according to claim 1, characterized in that the shell is made of optically transparent shrink film. 5. The cartridge for the absorption cartridge according to claim 1, characterized in that an alkalinity indicator is introduced into the absorber sheet.

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