RU2591164C1 - Method of producing structured regenerative product - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to production of regenerative cartridges. Disclosed is method of producing structured regenerative product. Initial reinforcing material in form of mat or band is moistened with solutions of target products, after which excess solution is squeezed on perforated plate roll. Then, impregnated reinforcing material is placed between two perforated plates and dried in vacuum chamber. First, vacuum drying is carried out without supply of heat during 15-30 minutes, after which product is subjected to infrared heating at rate of heating 5÷10 deg/min with subsequent maintenance at temperature of 125-135 °C for 10-20 minutes. Final forming is performed simultaneously with drying process.

EFFECT: higher quality when maximum oxygen content in product.

3 cl, 7 dwg, 2 ex

Description

The invention relates to a technology for the manufacture of regenerative products based on oxide compounds of alkali metals deposited on a porous substrate and designed to equip regenerative cartridges.

A known method of manufacturing a regenerative product in the form of granules, which consists in the fact that the source material is moistened to give plastic properties, rolled between rolls, granulated and fed to a conveyor belt, on which the granules are dried by passing through a heat chamber with a given temperature and gas composition and discharged into drive (Application EPO No. 1222958, IPC B01J 20/04, 1997).

The disadvantages of this method are:

- the impossibility of removing excess liquid fraction from the regenerative product;

- the need for complex forming equipment;

- due to the uneven distribution of the pressed material in the cavity of the forming tool is not achieved uniform density of the product. In areas with a smaller amount of moldable material, underpressing is possible in which the product does not have sufficient mechanical strength, and in areas with a large amount of product, overpressing occurs in which excess density causes a deterioration in the stoichiometric characteristics of the product;

- the use of the product in the form of granules requires additional costs for the organization of gas flows interacting with the product, which increases the material consumption when using it.

A known method of manufacturing a structured regenerative product, (RF Patent No. 2259231, IPC B01J 20/04, 2005), which consists in the fact that the source material in the form of a mat or tape moisten with solutions of the target products, after which the excess solution is squeezed out on a perforated plate with a roll and the subsequent forming is carried out simultaneously with the drying process on perforated plates, as well as the fact that after molding and drying the plates are cut along the contour with the cutting of the extreme jumpers of the side surfaces of the grooves, drying is carried out in the atmosphere purified from water vapor and carbon dioxide, the plate is formed by supplying gas or liquid under excessive pressure through the perforation of the squeeze roll, and the liquid is impregnated by supplying liquid through the perforation of the impregnation roll, which is installed in front of the squeeze roller.

The disadvantage of this method is the low quality of the regenerative product due to its warpage during drying. Another disadvantage of this method is the decrease in the content of active oxygen due to thermal decomposition of peroxohydrate due to its interaction with water at the beginning of drying.

The objective of the invention is to provide a method for obtaining a structured regenerative product, providing the product plates without warping and achieving maximum oxygen content in the product.

The problem is solved in that according to the method of manufacturing a structured regenerative product, namely, that the initial reinforcing material in the form of a mat or tape is moistened with solutions of the target products, after which the excess solution is squeezed out on a perforated plate with a roll, the impregnated reinforcing material is enclosed between two perforated plates and the resulting the package is placed in a vacuum chamber, in which the drying is initially carried out under vacuum without heat for 15-30 minutes, after which the product is suspended gayut infrared heating with heating rate of 5 ÷ 10 ° C / min until reaching 125 ° C, followed by aging at a temperature of 125-135 ° C for 10-20 min and final forming is carried out simultaneously with the drying process.

Perforation in the plates is performed in the form of rectangular holes with rounded edges, the longitudinal axes of which are located at an angle to the longitudinal axis of the plate, and the holes in the upper plate are located relative to the lower in the opposite direction.

Drying and molding of the plates of the regenerative product is carried out between the plates of a material inert to the regenerative product, preferably of F-4 fluoroplastic or stainless steel.

An additional perforated plate is placed on the impregnated reinforcing material and placed in a vacuum chamber, in which the drying is initially carried out under vacuum without heat for 15-30 minutes, after which the product is subjected to infrared heating at a heating rate of 5 ÷ 10 deg / min to reach 125 ° C followed by exposure at a temperature of 125-135 ° C for 10-20 minutes and the final molding is carried out simultaneously with the drying process between the perforated plates provides:

- obtaining plates of the regenerative product of the desired shape by eliminating warpage of the plates in the drying process;

- increased oxygen content in the regenerative product due to the sharp cooling of peroxohydrate by evaporation of moisture under vacuum without heat, which eliminates its extinction when interacting with water at the beginning of drying;

- obtaining on the surface of the plates a regenerative product of corrugations in the places of perforation of the plates due to their swelling in open areas;

- convenience of loading and unloading the product;

- relieving stresses in the plate arising during the drying process by holding at a constant temperature after drying of the product;

The use of a reinforcing material in the form of a mat or tape provides an increase in the mechanical strength of the product under the action of shock and bending loads due to the mechanical strength of the reinforcing material, which allows to reduce its weight per unit mass of the resulting regenerative product. At the same time, the manufacturability of the process increases and it becomes possible to give the product a different shape while maintaining its mechanical strength, which makes it possible to distribute the product in the cartridge with a decrease in its resistance to flow and a decrease in temperature. This reduces the release of alkaline aerosols by reducing local overheating, causing sublimation of alkali.

Performing the subsequent molding simultaneously with the drying process on the perforated plates allows to obtain the product in the form of corrugated plates, which provides more rigid sections that perform the functions of stiffeners. In this case, the corrugations create a predetermined gap between the plates. This provides a reduction in hydraulic resistance of the product.

The drying of the regenerative product between perforated plates with longitudinal holes rotated at an angle to the longitudinal axis of the plate ensures the creation of intersecting channels in the product package for the passage of regenerated air. By mixing the air flows in the channels at the points of their intersection, a more complete air regeneration is achieved, at which it is more completely cleaned of carbon dioxide, excess moisture and other impurities. The presence of channels for the passage of air provides not only a decrease in hydraulic resistance, but also increases the rigidity of the plates, an increase in their mechanical strength, and resistance to vibration that occurs during transportation and operation.

Drying between perforated plates with holes with a mirror arrangement provides an increase in the gap between the plates when they are superimposed due to the cross-location of the protrusions when they are superimposed. This simplifies assembly by eliminating the errors of regenerative cartridge collectors. Such a technical solution provides a decrease in temperature, product resistance and a decrease in alkaline aerosol emissions.

The drawings show:

in FIG. 1 shows a general view of a device for producing a regenerative product;

in FIG. 2 is the same as in FIG. 1, top view;

in FIG. 3 shows the position of the forming plates in a bag without a regenerative product;

in FIG. 4 shows a section along по-A of FIG. 3 forming plates with a regenerative product located between them;

in FIG. 5 shows a perforated plate;

in FIG. 6 is the same as in FIG. 5, section BB;

in FIG. 7 is the same as in FIG. 5, view along arrow B.

The list of items indicated in the drawings

1. The body of the drying chamber;

2. seal;

3. a cover made of optically transparent material;

4. infrared heater;

5. screen;

6. frame;

7.stand;

8. sleeve;

9. clamp;

10. product bag;

11. spacer insert;

12. bracket;

13. perforated plate top;

14. perforated bottom plate;

15. starting material and impregnated substrate;

16. hole;

17. temperature controller;

18. thermal sensor;

19. fitting;

20. pipeline;

21. vacuum pump;

22. protrusion of the plate.

The method is as follows.

The initial reinforcing material 15 in the form of a mat or tape with a thickness of 1 to 15 mm is placed on the lower perforated plates 14, after which it is impregnated with a solution of crystalline hydrates of peroxide compounds, the product is preformed at the same time by pressing it into the holes 16 of the lower perforated plate 14, after which the excess is squeezed out solution roll (not shown). In the plates 13 and 14, the perforation is made in the form of rectangular holes 16 with rounded edges, the longitudinal axis of the holes 16 are at an angle to the longitudinal axis of the plate, and the holes in the upper plate 13 are located in the opposite direction relative to the lower plate 14. Spin is carried out to reduce the thickness of the impregnated reinforcing material by 20-40%. After that, the impregnated reinforcing material is covered with an upper perforated plate 13 and the resulting package 10 is placed on the spacer inserts 11 located on the bottom of the drying chamber 1 body mounted on the frame 6, after which a cover made of optically transparent material 3 is mounted on the seal 2 by moving the corresponding bushings 8 down the racks 7 with the latches released 9. Then turn on the vacuum pump 21, which through the fittings 19 connected to the vacuum pump 21 by pipelines 20, creates a drying chamber in the casing A rarefaction that provides a mounting force to pressurize the cover of an optically transparent material 3 to the seal 2 by atmospheric pressure. Initially, the drying is carried out under vacuum without heat for 15-30 minutes, while the impregnated reinforcing material is cooled to a safe temperature (approximately 2 -3 ° C) at which decomposition of peroxohydrate does not occur. Then, the power of the infrared heaters 4 is turned on and the partially dehydrated product is subjected to infrared heating at a heating rate of 5 ÷ 10 deg / min until it reaches 125 ° C.

Temperature control and its regulation is carried out by the temperature controller 17 according to the readings of the temperature sensor 18. Drying and molding of the plates of the impregnated substrate 15 is carried out between the plates of a material inert to the regenerative product, preferably F-4 fluoroplastic or stainless steel. To prevent heating of the seal 2 during the drying process, a screen 5 is used, the installation height of which is controlled by changing the position of the corresponding brackets 12, the movement of the bushings 8 along the racks 7, followed by their fixation by the clips 9.

The final molding is carried out simultaneously with the drying process between the perforated plates 13 and 14, maintaining the above temperature. During the drying process, the product swells, filling holes 16 in the plates 13 and 14, forming protrusions 22, after which the product is kept at a temperature of 125-135 ° C for 10-20 minutes to relieve internal stresses. If necessary, the product plates or tapes are cut into sheets of a given format, for which they are cut along the contour with the cutting of the extreme jumpers of the side surfaces of the grooves and unloaded into a storage tank (not shown). Drying is carried out in vacuum at a residual pressure of not more than 0.1-0.3 kPa.

Example 1

The needle-punched fabric of the IPP-pV-150/6 brand was laid out on a 6 mm thick fluoroplastic perforated plate with dimensions of 120 × 370 mm with 36 grooves of 10 × 52 mm at an angle to the longitudinal axis of 8 ° C degrees and impregnated with a 50% potassium peroxohydrate solution until the fiberglass saturates about 0.4-0.8 mg / cm ² . Then the excess solution was squeezed by rolling with a fluoroplastic roller with a diameter of 60 mm until the product reached a thickness of 3.6 mm and the fiberglass was pressed into the grooves of the plate to a depth of about 5 mm, counting from the top surface of the product. Then the bag was placed in a drying chamber, vacuum was turned on and kept for 20 min at a residual pressure of not more than 0.2 kPa, after it was heated and dried for 12 min to a temperature of 125 ° C, then it was kept for 20 minutes at a temperature of 128 ° C . Received a structured regenerative product of potassium superoxide in the form of plates with the indicated dimensions, a thickness of 2 mm with a height of convexity of 4.5 mm on each side and a content of chemically bound oxygen of at least 20%.

Example 2

They laid out BMDk glass paper in the amount of 6 layers on a fluoroplastic perforated plate with a thickness of 3 mm, dimensions 120 × 370 mm with 36 grooves 10 × 52 mm at an angle of 8 degrees and was impregnated with a 50% potassium peroxohydrate solution until the glass fabric was saturated approximately 0.3-0.5 mg / cm ² . Then the excess solution was squeezed by rolling with a fluoroplastic roller with a diameter of 60 mm until the product reached a thickness of 2 mm and the fiberglass was pressed into the grooves of the plate to a depth of about 2.5 mm, counting from the top surface of the product. Then the bag was placed in the drying chamber, vacuum was turned on and kept for 15 min at a residual pressure of not more than 0.2 kPa, after it was heated and dried for 12 min to a temperature of 125 ° C, then it was kept for 15 minutes at a temperature of 130 ° C . A structured regenerative product of potassium superoxide was obtained in the form of plates with the indicated dimensions, a thickness of 2 mm with a height of convexity of 2.5 mm on each side and a chemically bound oxygen content of at least 21%.

The proposed method is simple in hardware design and operation and provides plates of a structured regenerative product without warping and achieving maximum oxygen content in the product.

Claims (3)

1. A method of manufacturing a structured regenerative product, comprising processing the initial reinforcing material in the form of a mat or tape by moistening with solutions of the target products, after which the excess solution is squeezed out on a perforated plate with a roll, characterized in that the impregnated reinforcing material is enclosed between two perforated plates and the resulting bag is placed in a vacuum chamber, in which the drying is initially carried out under vacuum without heat for 15-30 minutes, after which the product was infrared heating at a heating rate of 5 ÷ 10 deg / min until reaching 125 ° C, followed by exposure at a temperature of 125-135 ° C for 10-20 minutes and the final molding is carried out simultaneously with the drying process. 2. The method according to p. 1, characterized in that the perforation in the plates is performed in the form of longitudinal holes with rounded edges, the longitudinal axis of which is rotated at an angle to the longitudinal axis of the plate, and the holes in the upper plate are deployed relative to the lower in the opposite direction. 3. The method according to p. 1, characterized in that the drying and molding of the plates of the regenerative product is carried out between the plates of a material inert to the regenerative product, preferably of ftoroplast F-4 or stainless steel.

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