RU203876U1 - COAXIAL INSERT FOR THERMAL SUPPORT - Google Patents

Abstract

The utility model relates to the field of construction of engineering structures in the permafrost zone, namely to systems for soil cooling.In systems for soil cooling, operating on the principle of natural air convention, in a cavity of a vertical pipe buried in the ground, to increase the cooling efficiency by separating the descending and ascending flows air coaxial insert is used. At present, a metal pipe is used for the coaxial insert, which unjustifiably overestimates the material consumption. A design is proposed in which the mandrel is pulled onto the hoops, and the resulting flexible system is suspended in the upper part of the thermo-support cavity. Efficiency is a decrease in material consumption.

Description

The utility model relates to the field of construction of engineering structures in the permafrost zone, namely to systems for soil cooling.

Known coaxial insert for thermosyphons, made in the form of a tubular element located in the center of the cavity of the shell of the thermosyphon, and position latches of the tubular element within the cavity, and the tubular element has upper and lower bypass holes located respectively at the top and bottom of the coaxial insert, while the area of the upper , the lower bypass openings and the cross-section of the cavity of the tubular element are equal to each other and equal to half the cross-sectional area of the cavity of the thermosyphon shell (V.I. Makarov. Thermosiphons in northern construction. Novosibirsk "Publishing house" Nauka ", Siberian Branch, 1985, Fig. 2.1 ).

The disadvantage of this coaxial insert is that it is intended for a liquid-type cooling system with a small tank size and a high density of the refrigerant (kerosene), therefore, its design cannot be mechanically transferred to air systems.

A coaxial insert for a thermo-support is known, made in the form of a tubular element located in the center of the cavity of the shell of the thermo-support, and fixers for the position of the tubular element within the cavity, and the tubular element has upper and lower bypass holes located respectively at the top and bottom of the coaxial insert, while the area of the upper , the lower bypass openings and the cross-section of the cavity of the tubular element are equal to each other and equal to half the cross-sectional area of the cavity of the thermo-support shell. (SP 354.1325800.2017, Foundations of bridge supports in areas of permafrost distribution. M. Standartinform. 2018. Appendix I).

The coaxial insert is made in the form of a solid pipe. However, to separate the refrigerant streams, when the latter is practically weightless air, a very light material such as paper or foil is sufficient.

The purpose of this utility model is to reduce the consumption of materials and, consequently, the cost of the structure.

To achieve this goal, the coaxial insert for the thermo-support is made in the form of a tubular element located in the center of the cavity of the thermo-support shell, and fixers for the position of the tubular element within the cavity. The tubular element has upper and lower bypass holes located at the top and bottom of the coaxial insert, respectively. The areas of the upper, lower bypass openings and the cross-section of the cavity of the tubular element are equal to each other and equal to half the cross-sectional area of the cavity of the shell of the thermo-support. The tubular element is divided into two components - the supporting structure and the shell separating the refrigerant flows. The supporting structure is made in the form of a rigid grip of one or more horizontal rods located in the upper part of the thermo-support shell and fixed in the body of the thermo-support shell. The shell-separator of the refrigerant flows consists of a flexible material stretched on hoops located along the shell height, at a distance that ensures the preservation of the shape of this shell, close to the cylinder. The upper hoop is secured in a rigid grip. The position lock is aligned with a rigid grip.

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

in fig. 1 shows the design of a thermo-support with a coaxial insert according to the prototype (section A-A in Fig. 2);

in fig. 2 - section b-b is presented in Fig. 1 thermocouples with a coaxial insert according to the prototype;

in fig. 3 - shows the design of the thermal support with a coaxial insert of the proposed scheme (section D-D in Fig. 4);

in fig. 4 shows a section E-E in FIG. 3 thermo-supports with a coaxial insert of the proposed scheme;

in fig. 5 and 6 - parts of the shell-separator of refrigerant flows are shown;

in fig. 7 and 8 - elements of a rigid grip are presented.

Coaxial inserts are an integral part of the thermo-support, which contains a rigid enclosing shell 1, immersed in the ground 2 below its natural surface 3. From the bottom, a rigid enclosing shell, closed, for example, with a concrete plug 4 (to prevent the penetration of groundwater into the cavity), rests on the top of the shell crossbar 5, which perceives an external load (if the thermo-support is a supporting and cooling element, if it is only a cooling element, then it is simply closed from above with a lid). Ground cooling occurs due to air convection in winter. The coaxial insert serves to intensify the cooling process by separating the upward and downward air flows. It consists of a tubular element 6 located in the center of the cavity of the rigid enclosing shell, and fixators 7 for the position of the tubular element within the cavity. At the top and bottom of the tubular element are bypass openings 8. In winter, the air in the cavity through the walls of the rigid enclosing shell 1 is cooled and descends downward, forming a descending flow 9. Warm air displaced from below through the lower bypass openings 8 along the coaxial insert rises upward, forming upward flows 10, which again flow through the upper overflow openings 8 to the walls of the rigid enclosure for cooling.

In the existing structure (Figs. 1 and 2), the element 6 is made of a metal pipe. As a result, a technical contradiction is formed. On the one hand, the pipe is needed to ensure the separation of the upward and downward air currents. On the other hand, it is not so much a pipe that is needed as some very light partition between the counter streams, which, with such a setting, will lose its bearing capacity and a fixed position within the cavity, therefore, is impracticable. To achieve this goal (reducing material consumption), it is proposed (Figs. 3 and 4): the solid shell is replaced by a suspension system operating in tension.

In the proposed technical solution, the tubular element is divided into two components - a supporting structure in the form of a rigid grip 11 from one or more horizontal rods located in the upper part of the thermal support shell, and a shell - a separator of refrigerant flows 12.

The shell-separator of refrigerant flows 11 (Fig. 3 and 4) consists of hoops 13 (Fig. 5 and 6), located in height at a distance from each other equal to "b", on which flexible material, for example, mandrel 14, is stretched. Rigid grip 11 (Fig. 3 and 4) consists, for example, of a straight rod 15 and a concave rod 16 (Fig. 7 and 8), fixed in a rigid enclosing shell 1 (Fig. 3). The distance "b" between the hoops is determined by calculation, depending on the flexibility of the shell material and the degree of control during the installation of the thermal support. Possible twisting of the material, narrowing of the hole in the middle between the hoops, lateral extrusion of the material during installation, etc. To ensure the preservation of the shape, the following relationship can be recommended: b = πR, where R is the radius of the hoop.

Instead of parallel hoops, a continuous spring-like hoop with spacers between the turns can be used.

The design works as follows.

In winter, the air in the cavity through the walls of the rigid enclosing shell 1 is cooled and descends, forming a downward flow 9. Warm air displaced from below through the lower bypass holes 8 along the coaxial insert rises upward, forming ascending flows 10, which again enter through the upper bypass holes 8 to the walls of the rigid enclosure for cooling.

This technical solution has the following essential features.

The first essential sign:

- a coaxial insert for a thermal support, made in the form of a tubular element located in the center of the cavity of the thermal support shell, and fixators for the position of the tubular element within the cavity, and the tubular element has upper and lower bypass holes located respectively at the top and bottom of the coaxial insert, while the area of the upper , the lower bypass openings and the cross-section of the cavity of the tubular element are equal to each other and equal to half the area of the cavity of the thermo-support shell.

The second essential feature:

- the tubular element is divided into two components - the supporting structure and the shell-separator of the refrigerant flows.

The third essential feature:

- the supporting structure is made in the form of a rigid grip of one or several horizontal rods located in the upper part of the thermo-support shell and fixed in the body of the thermo-support shell, and the shell-separator of refrigerant flows made of flexible material stretched on hoops located along the shell height at a distance that provides maintaining the shape of this shell, close to the cylinder, while the upper hoop is fixed in a rigid grip, and the position lock is aligned with the rigid grip.

All three essential features are interrelated, necessary and sufficient to achieve the claimed technical result. All these features are reflected in clause 1 of the formula.

The effectiveness of the proposed technical solution lies in reducing the material consumption of the coaxial insert.

Claims (1)

Coaxial insert for the thermo-support, made in the form of a tubular element, located in the center of the cavity of the shell of the thermo-support, and fixers for the position of the tubular element within the cavity, and the tubular element has upper and lower bypass holes located respectively at the top and bottom of the coaxial insert, while the area of the upper, of the lower bypass openings and the cross-section of the cavity of the tubular element are equal to each other and equal to half the cross-sectional area of the cavity of the thermo-support shell, characterized in that the tubular element is divided into two components - the supporting structure and the shell-separator of refrigerant flows, while the supporting structure is made in the form of a rigid gripper from one or more horizontal rods located in the upper part of the thermo-support shell and fixed in the body of the thermo-support shell, and the shell-separator of refrigerant flows - from a flexible material stretched on hoops located along the shell height, at a distance ni, ensuring the preservation of the shape of this shell, close to the cylinder, while the upper hoop is fixed in a rigid grip, and the position lock is aligned with the rigid grip.

Images