RU202182U1 - 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 air flows a coaxial insert is used. At present, a metal pipe is used for the coaxial insert, which unjustifiably overestimates the material consumption. A technical solution for the coaxial insert is proposed: it is made in the form of a rigid frame made of corners, on which a dornite shell is attached. Efficiency - reducing 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 fixators of 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 thermosyphon shell (V.I. Makarov. Thermosiphons in northern construction. Novosibirsk "Publishing house" Science ", 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, a very light material such as paper or foil is sufficient to separate the refrigerant flows when the latter is practically weightless air.

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 overflow 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 thermo-support shell. 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 frame. The shell-separator of refrigerant flows is made of a flexible material attached to a rigid frame, while the retainer of the tubular element is attached to the rigid frame.

In addition, the rigid frame can be made of four corner posts and overall frames that fix the dimensions of a specific section of the rigid frame, and the clips of the tubular element are aligned with the overall frames.

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 shown in Fig. 1 thermocouples with a coaxial insert according to the prototype;

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

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

in fig. 5 is a diagram of a rigid frame (section B-B in Fig. 4);

in fig. 6 - shows a cross-section of a rigid frame in the area of longitudinal joining;

in fig. 7 shows a general view of rigid frames (section D-D in Fig. 5);

in fig. 8 - shows a general view of the panel (Fig. 3.);

in fig. 9, 10, 11, 12, 13 - elements of a rigid frame 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, the rigid enclosing shell is closed, for example, with a concrete plug 4 (to prevent the penetration of groundwater into the cavity), a crossbar rests on the top of the shell 5, which receives 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. There are bypass holes 8 at the top and bottom of the tubular element 8. In winter, the air in the cavity through the walls of the rigid enclosing shell 1 is cooled and falls down, forming a descending flow 9. Warm air displaced from below through the lower bypass holes 8 along the coaxial insert rises upward, forming ascending flows 10, which through the upper overflow openings 8 again flow to the walls of the rigid enclosure for cooling.

In the existing structure (Figs. 1 and 2), element 6 is made of a metal tube. The result is a technical contradiction. On the one hand, the pipe is needed to ensure the separation of upward and downward air flows. On the other hand, it is not so much a pipe that is needed as some very light partition between the oncoming flows, which, with such a setting, will lose its bearing capacity and a fixed position within the cavity, therefore, it is impracticable. To achieve this goal (reducing material consumption), it is proposed (Figs. 3 and 4): the solid shell is replaced by four posts and a mandrel stretched on them.

In the proposed technical solution, the tubular element is divided into two components - a supporting structure in the form of a rigid frame 11 and a shell-separator of refrigerant flows 12 (Fig. 3 and 4).

The rigid frame 11 consists (Fig. 5) of 4 corners 13 (Fig. 13), united in height by rigid frames, which consist of plates 14, united by corner strips 15 (Figs. 5 and 7). The shell-separator of the refrigerant flows 12 consists of 4 panels 16, for example, of dornite with upper and lower bypass openings 8 (Fig. 8). Plates 14 perform two functions: on the one hand, they form the dimensions of the cavity of the coaxial insert, and on the other, their outer ends are fixators for the position of the tubular element within the cavity of the rigid enclosing shell 1 (Fig. 4). If in this case the plate 14 is made composite (assembled), which can change the length (Fig. 11 and 12), then the proposed design of the coaxial insert becomes universal for cavities of any size, and the elements of this insert can be manufactured in large series, which reduces the cost of the kit. The only non-universal elements in the set are panels 16. But this does not lead to a serious complication, since the production of panels is extremely simple - cutting from rolls, which can be carried out at the construction site. The corners 13 can be extended in length using flat pads 17 (Fig. 5).

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 descending 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 at the top and bottom of the coaxial insert, respectively, with 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 of 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 frame, and the shell-separator of the coolant is made of a flexible material attached to the rigid frame, while the retainer of the tubular element is attached to the rigid frame.

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

In addition, there is an additional essential feature: "the rigid frame is made of four corner posts and overall frames fixing the dimensions of a specific section of the rigid frame, and the clips of the tubular element are aligned with the overall frames", which is reflected in paragraph 2 of the formula.

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

Claims (2)

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 fixators of the position of the tubular element within the cavity, the tubular element having upper and lower bypass holes located respectively at the top and bottom of the coaxial insert, while the area 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 of 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 in the form of a rigid frame, and the shell-separator of the refrigerant flows is made of a flexible material attached to the rigid frame, while the retainer of the tubular element is attached to the rigid frame. 2. Coaxial insert according to claim 1, characterized in that the rigid frame is made of four corner posts and overall frames that fix the dimensions of a particular section of the rigid frame, and the clips of the tubular element are aligned with the overall frames.

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