RU195435U1 - COMPOSITE METAL COMPOSITE SEISMICALLY RESISTANT CYLINDER - Google Patents

Abstract

The proposed utility model relates to high-pressure vessels, in particular, metal composite cylinders used in fire fighting equipment to create large and high-capacity gas fire modules for objects with a large number of guarded premises and fire fighting systems of military equipment. The utility model has the following objectives for fire-fighting purposes: increasing the mass of stored gas in a fixed volume, providing the ability to change the volume of stored gas in accordance with the volumes of protected premises and increased safety of operation. The technical result is achieved by the fact that the composite metal-composite seismic shockproof cylinder containing the main internal cylinder with two necks in the bottoms and the internal working cavity is equipped with an external cylinder covering the internal cylinder with the formation of an additional working cavity between the cylinders, and the output channels of the main the inner cylinder is made in one of the necks, and the output channels of the additional working cavity are made in the other neck nnego ballona.5 yl.

Description

The proposed utility model relates to pressure vessels, in particular, to metal composite cylinders used in the fire protection systems of stationary and mobile objects of the Ministry of Defense.

When creating fire extinguishing systems for objects of the Ministry of Defense, requirements for increasing efficiency (functionality) are expressed in the desire to increase the storage volumes of extinguishing gas mixtures in cramped conditions and to provide increased seismic shock resistance of their structures.

A multi-cavity cylinder is known from the prior art (RF patent No. 2365809 publ. August 27, 2009), which consists of a housing, enclosed enclosed shells installed with a gap relative to each other, and a dispensing refueling device for filling / emptying the gas cylinder. The housing consists of a cylindrical part and two hemispherical bottoms of the same thickness h. Inside the housing there are several spherical closed shells of thickness h / 2, forming cavities. Two hemispheres of the same thickness are recessed into the body and form, with the corresponding hemispherical bottoms, extreme spherical cavities. The centers of the spheres, including the extreme ones, are located on the axis of the body. The cavities formed by the inner surface of the cylindrical part of the housing and the outer surfaces of the spherical shells are connected to each other and to the filling device, creating a second additional set of communicating cavities.

The disadvantage of this technical solution is the complexity of manufacturing a multi-cavity container in the form of a metal-plastic liner with a composite composite layer deposited on its surface.

Another technical solution for a composite cylinder, which can be made and assembled from metal-composite cylinders of a classical shape based on a metal liner and a composite shell, is described in RF patent No. 2355942, published on 05/20/2009. A container for compressed and liquefied gases or liquids contains at least at least two pressure vessels connected to each other with the possibility of communication, at least one of which is equipped with a neck for connecting shut-off valves. Each vessel includes a cylindrical shell and bottoms, while the vessels communicate with each other through the through holes in the side walls of the shells and / or bottoms by means of at least one tubular connecting element, which through sections on its outer surface is sealed to the walls of the holes in the shells and / or the bottoms of the vessels with the formation of a rigid force structure. The main disadvantage of this solution is that a composite cylinder of identical vessels occupies a volume proportional to the mass of the gas stored in them.

A design variant of a multilayer composite cylinder is given in utility patent No. 69610, published December 27, 2007. The technical challenge facing the authors is to increase the safety of cylinder operation. The technical result is achieved by the fact that in the known design of a high-pressure cylinder containing a power shell made of composite material and an internal thin-walled sealing liner, the power shell is wound from the inner and outer layers, while the inner layer is made of basalt roving over the entire surface of the balloon and contains several layers, and the outer layer is made of glass roving and contains at least two layers.

The objectives of the utility model are to increase the storage capacity of extinguishing gas mixtures in cramped conditions and increase seismic shock resistance.

The technical result is achieved by the fact that a composite metal-composite earthquake-resistant cylinder containing a main internal cylinder with two necks in the bottoms and an internal working cavity is equipped with an external cylinder covering the internal cylinder with the formation of an additional working cavity between the cylinders, and the output channels of the main internal cylinder are made in one of the neck, and the output channels of the additional working cavity are made in another neck of the inner cylinder.

The supply of the main inner cylinder with an additional external cylinder allows you to increase the pressure in the working cavity of the inner cylinder by creating back pressure in the additional working cavity formed between the inner and outer cylinders.

The implementation of the output channels of the main inner cylinder in one of the necks, and the output channels of the additional working cavity in the other neck of the inner cylinder increases the seismic resistance of the balloon due to a more even distribution of the reduced mass of the locking devices (which increases the resistance to shock from seismic waves) and impact resistance by reducing the likelihood of damage point impact object (fragment, shell) at once two locking devices. Impact resistance is also enhanced by the fact that the outer balloon is essentially a shield for the inner balloon.

The essence of the utility model is illustrated by drawings, which show:

- in FIG. 1 is a longitudinal section of a container in which two working cavities are formed (primary and secondary);

- in FIG. 2 - transverse section of the cylinder (section aa, Fig. 1);

- in FIG. 3 is a longitudinal section of the mouth of the output channels from the additional working cavity (view I, Fig. 1);

- in FIG. 4 is a section through the shells of the inner and outer cylinders in the middle part (view II, FIG. 1);

- in FIG. 5 is a longitudinal section of the mouth of the outlet channels from the inner cylinder (view. W, Fig. 1).

The composite metal-composite seismic shock-resistant balloon contains an inner balloon 1 with a main working cavity 2 and an outer balloon 3, covering the volume of the inner balloon 1 so that the inner balloon 1 is inside the outer balloon 3 with the formation of an additional working cavity 4.

The inner cylinder 1 has two necks:

- the neck 5 with the outlet channel 6 from the working cavity 2 of the cylinder 1. For the working cavity 4, the neck 5 is muffled;

- the neck 7 with the output channel 8 for the working cavity 4. For the working cavity 2, the neck 7 is muffled.

The necks 5 and 7 are simultaneously technological fasteners on a winding machine (not shown) in the manufacture of a metal composite balloon.

The inner cylinder 1 consists of a liner 9 and a power composite layer 10, and the outer cylinder 3 consists of a liner 11 and a power composite layer 12.

When using the proposed composite metal-composite seismic shockproof cylinder, it is equipped with locking and starting devices (not shown in the drawings) and is filled with a gas extinguishing mixture.

Filling takes place in the following order:

Stage 1 - both working cavities are filled - the main 2 and additional 4 to a pressure of P ₂ = P ₄ , the value of which is the calculated (limit) P _pre for an external balloon 3 P ₂ = P ₄ = P _pre . In this case, the mass of the gas extinguishing mixture corresponding to this pressure and volume is M _Σ = M ₂ + M ₄ ; mass M _Σ = f (P ₄ , P ₂ , V ₄ , V ₂ ) or, given that P ₂ = P ₄ = P _{before the} total mass of the extinguishing mixture will be M _Σ = f (P _before , V ₂ + V ₄ ) ;

Stage 2 - the working cavity 2 of the inner cylinder 1 is additionally filled to a pressure value, the value of which is calculated (limit) for it, exceeding the pressure in the working cavity 4 of the outer cylinder 3 due to the smaller diameter and due to the back pressure in the cavity 4 of the outer cylinder 3. When this accumulates the mass of the extinguishing mixture corresponding to the pressure and volume M ₂ = f (P ₂ , V ₂ ).

Since the pressure of P _{2 is} much greater than P _before and the total value of the extinguishing mixture will be more M _Σ = [M ₂ = f (P ₂ , V ₂ )] + [M ₄ = f (P _pre , V ₄ )]

Thus, in the volume occupied by the external cylinder 3, a larger mass of the extinguishing mixture with a conditional efficiency coefficient K _{eff is} accumulated for storage.

The calculations carried out for a two- _cavity balloon with an outer balloon diameter d _vsh = 380 mm and an inner d _vt = 240 mm with a twofold increase in pressure in the inner cavity compared to the intermediate one reaches K _eff = 1.58.

If the difference between the diameters d _vnv and d _{vtn is} reduced in magnitude, for example, take d _vnv = 380 mm and internal d _vtv = 300 mm, then the efficiency coefficient will exceed K _eff = 2.0.

Locking-starting devices (not shown) are connected to the mouth 5 to the output channels 6 and to the neck 7 to the output channels 8.

The liner 9 with the power composite layer 10 and the liner 11 with the power composite layer 12 provide the specified structural strength of the inner balloon 1 and the outer balloon 3.

Claims (1)

A composite metal composite seismic shockproof cylinder containing a main internal cylinder with two necks in the bottoms and an internal working cavity, characterized in that it is equipped with an external cylinder covering the internal cylinder with the formation of an additional working cavity between the cylinders, and the output channels of the main internal cylinder are made in one of the necks and the output channels of the additional working cavity are made in another neck of the inner cylinder.

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