RU180975U1 - High pressure metal composite cylinder designed for mobile automobile gas tankers in vertical installation with fixing by the neck - Google Patents

Abstract

The cylinder is designed for mobile automobile gas refueling tanks (PAGZ) for vertical installation with fixation for the necks. The cylinder contains an internal metal liner, including a cylindrical part, bottoms and necks, an external power shell made of composite, additional ring windings from the composite with a snug fit on the part of the necks length to the power shell on one side and a flat surface with another diameter of at least 120-130 mm at a length at which the length of the parts of the necks free from winding from their ends is it is no more than 15 mm. On the parts of the neck that are free from winding, bushings made of elastic material with a wall and flange thickness of not more than 5 mm are installed. The technical result is to increase the reliability of the cylinders and, therefore, to increase the reliability of PAGZ.

Description

The utility model can be used in mechanical engineering, in particular in the manufacture of mobile automobile gas refueling machines (PAGZ) with the vertical installation of cylinders and fastening them by the neck.

Cylinders in this case are usually installed in a special container.

The container contains longitudinal beams. The transverse beams (lower and upper) are attached to them.

Coaxial holes are made in the transverse beams in which the necks of the cylinders are placed and thereby they are fixed in a vertical position.

The lower cross beams support the cylinders.

Vertical installation of cylinders allows you to create a PAGZ with the most dense placement of cylinders.

Xperion high pressure cylinders are known (see Xperion design aspects) with composite-free necks for which they are fixed in PAGZ during vertical installation. In this case, KPG-4 cylinders with plastic liners are used.

The main disadvantage of these cylinders is their low reliability during operation as part of PAGZ. This is due to the fact that plastic liners have metal embedded elements. For the necks of these elements, the cylinders are fixed on the transverse beams in the PAGZ container.

During operation of the PAGZ, all vertical and lateral loads during the movement of the PAGZ are perceived by these embedded elements, which over time can lead to a weakening of their connection with the plastic of the liner and loss of tightness of the cylinders and as a result of their premature failure and, therefore, PAGZ.

Luxfer KPG-3 high-pressure cylinders are known for use in PAGZ with vertical installation of cylinders (see Dunetek Luxfer Gas Cylinders).

In this case, to increase the reliability of the cylinders and, therefore, PAGZ, the design of the cylinders is significantly complicated. The liners are made of aluminum alloy. On the necks perform not only internal thread, but also external. Steel sleeves with curly flanges are screwed onto the external thread, which are wound with a composite upon receipt of a power shell. For parts of composite-free steel bushings, cylinders are fixed on the transverse beams of PAGZ. The main disadvantage of such cylinders is the high cost due to the complexity of their design and manufacturing technology.

Since the main cost of PAGZ is the cost of cylinders, this automatically leads to a rise in price of PAGZ.

A common disadvantage of Xperion and Luxfer cylinders is that their lower supporting surface after winding the composite has a complex curved surface, which is obtained by spiral winding the composite on the bottoms of the cylinders. As a result, the contact of the lower bottoms of the cylinders with the transverse beams in PAGZ will be mainly linear. Therefore, if we take into account the weight of the gas cylinders, as well as the vibration loads during the movement of the PAG to the contact surface of their bottoms, we can conclude that the cylinders are not reliable enough, since it is possible to crush the composite on the bottoms of the cylinders during the operation of the PAG and to prematurely fail them and therefore PAGZ.

As the closest analogue to the prototype, a high-pressure cylinder was adopted (utility model RU 58657 U1, F17C 1/06, 11/27/2006) containing an internal metal liner including a cylindrical part, bottoms and necks, an external power shell made of composite, additional annular rings windings from a composite with a tight fit to the power shell on one side and a flat surface on the other.

And in this case, with the vertical installation of cylinders in the PAGZ, the contact of the lower bottoms with the transverse beams will also be predominantly linear. Therefore, the reliability of the cylinders during operation as part of the PAGZ will not be high enough and, therefore, the reliability of the PAGZ will be insufficient.

In this case, the problem can be solved by installing the cylinders on the lower transverse beam through special linings of non-metallic materials on one side with a surface covering part of the bottom of the cylinder, and on the other with a flat surface to support the lower transverse beam.

This requires the use of additional parts in PAGZ, which increases the cost of PAGZ.

The objective of the proposed utility model of the high-pressure cylinder used in the PAGZ with vertical installation is to increase the reliability of the cylinders and, therefore, the reliability of the PAGZ at their minimum cost.

The problem is achieved in that in the high-pressure cylinder for PAGZ in a vertical installation with fixation behind the neck, containing an internal metal liner with a cylindrical part, bottoms and necks, an external power shell made of composite and additional annular windings made of composite made on the necks that fit tightly to to the power shell on one side and with a flat surface on the other, additional annular windings are made with a diameter D of at least 120-130 mm on a part of the length of the necks, while free from winding parts of the necks from their ends is not more than 15 mm.

The cylinder is equipped with bushings made of elastic material with flanges with a thickness of not more than 5 mm and diameters equal to the diameter of the additional annular windings mounted on the winding parts of the necks of the neck and the wall thickness of the bushings of elastic material is not more than 5 mm.

The part of the necks that are not coiled up by the composite, with a length of not more than 15 mm from their ends, allows the cylinder to be securely fixed by the necks in the openings of the transverse beams.

An additional annular winding on the necks of a composite with a diameter D of at least 120-130 mm allows the cylinders to be supported on the lower transverse beams in a plane, which, by reducing the specific loads on the bottom composite, increases the reliability of the cylinders when installed vertically in the PAGZ and, therefore, the reliability of the PAGZ .

The diameter of the additional annular winding 120-130 mm on the neck of the cylinder is assigned from the condition that there is no collapse of the composite on the additional annular winding during operation of the PAGZ.

It is possible to increase the reliability of cylinders and, therefore, PAGZ, if bushings made of elastic material, for example polyurethane, with flanges with a wall thickness of not more than 5 mm and diameters equal to the diameter of additional annular winders with a sleeve wall thickness of not more than 5 mm, can be placed on unmanned parts of the necks , while the sleeve can be installed with an interference fit or with a gap filled with adhesive.

With accurate manufacture of neck diameters, it is convenient that the bushings do not slip off the neck of the cylinders when assembling the PAGZ; install them on the neck with an interference fit.

In the manufacture of neck diameters with large tolerances, it is advisable to install the sleeves with a gap, to prevent the bushings from slipping off the necks, fill the gap with adhesive.

These bushings eliminate direct contact between the neck metal and the cross-member metal, thereby eliminating the electrochemical corrosion of the neck metal, as well as mitigate the effect of transverse loads during the movement of the PAG on the neck.

Recommended thicknesses of the flanges and walls of the bushings of not more than 5 mm are optimal.

The flanges on the bushings mitigate the effect of vertical loads on the extra windings. This increases the reliability of the cylinders.

Additional ring windings, depending on which composite is used for the power shell, can be performed by glass roving, basalt roving, carbon roving, organoroving, or a combination of these materials.

The design of the proposed balloon in the neck is shown in FIG. one.

In FIG. one:

1 - liner;

2 - power winding with a composite;

3 - neck of the liner;

4 - additional annular winding with composite on the neck;

5 - a sleeve with a flange made of elastic material;

At the cylinder bottoms on both sides are identical.

Cylinders are installed in the PAGZ container on the lower transverse beams with support on the flat surfaces of additional annular coils and are fixed by the necks in the openings of the lower and upper transverse beams.

At the same time, special devices (not shown conditionally) are installed on the upper transverse beams of PAGZ for each cylinder, taking into account size fluctuations along the length of the cylinder, as well as their elongation when filling with gas.

The operation of cylinders in the composition of PAGZ is carried out in the following mode: filling with gas to working pressure (for example, 24.5 MPa), gas delivery to consumers to the lowest possible pressure, due to the design features of PAGZ.

The proposed cylinders with the design shown in Fig. 1 are used by us to equip PAG3-5000-24.5-3, where:

5000 - the volume ^of compressed gas transported in nm ³ , referred to normal conditions (0.1 MPa; 20 ° C);

24.5 - maximum excess (working) pressure in the gas equipment system in MPa;

3 - the number of functional sections.

Cylinders have the following characteristics: capacity 210 l, length 2300 mm, diameter 405 mm.

Claims (5)

1. A metal composite high-pressure cylinder designed for mobile gas tankers in a vertical installation with fixation for the neck, containing an internal metal liner with a cylindrical part, bottoms and necks, an external power shell made of composite and additional ring windings made of composite made on the necks and fit tightly to the power shell on the one hand and with a flat surface - on the other, characterized in that the additional windings are made with a diameter of at least 120-130 mm on the part of the neck length, while the length of the neck-free parts of the neck from their ends is not more than 15 mm, and the cylinder is equipped with bushings made of elastic material with flanges no more than 5 mm thick and diameters mounted on the neck-free parts of the neck, equal to the diameter of the additional annular windings, while the wall thickness of the bushings of elastic material is not more than 5 mm 2. The cylinder according to claim 1, characterized in that the bushings are made of polyurethane. 3. Cylinder according to claim 1 or 2, characterized in that the bushings of elastic material are installed with an interference fit. 4. A cylinder according to claim 1 or 2, characterized in that the bushings of elastic material are installed with a gap filled with adhesive. 5. The cylinder according to claim 1, characterized in that the additional annular windings on the necks are made of glass roving, basalt roving, carbon roving, and organo roving.

Images