RU206763U1 - Reinforced concrete half sleepers cover for subway - Google Patents

Abstract

The utility model relates to the construction of the superstructure of the underground railway track, in particular, to devices for damping the vibration of the railway track as part of a reinforced concrete half-sleeper, cover, laying under the half-sleeper. The cover of the reinforced concrete half sleepers contains a bottom, two side and two end walls, connected to each other, forming a shell in the form of a hollow open top and expanding upward truncated pyramid, at the base of the bottom of which is a trapezoid. New is the implementation of the polyurethane cover. The technical result consists in increasing the reliability of the cover and increasing its service life, in reducing the mechanical vibrations of the reinforced concrete half-sleepers during the passage of the rolling stock and increasing the service life of the said half-sleepers installed in the cover. 4 c.p. f-ly, 7 ill.

Description

Technology area

The utility model relates to the construction of the superstructure of the underground railway track, in particular, to devices for damping the vibration of the railway track as part of a reinforced concrete half-sleeper, cover, laying under the half-sleeper.

Prior art

From the prior art, a cover is known for a rubber half sleepers for the subway (see RU 186427, IPC E01B3 / 28, publ. 01.21.2019, bull. No. 3), consisting of a shell made in the form of a hollow open top truncated pyramid, at the base of the bottom of which lies a trapezoid.

The rubber cover described above helps to damp vibrations with a half-sleeper when the rolling stock is moving. However, the manufacture of a rubber cover cannot guarantee its use for a long period of time, since rubber undergoes various types of aging and deteriorates during operation.

In addition, the operation of rubber industry enterprises is usually accompanied by the release of substances of varying degrees of danger into the atmosphere.

Disclosure of a utility model

The technical result consists in increasing the reliability of the developed cover and increasing its service life, in reducing the mechanical vibrations of the reinforced concrete half-sleepers during the passage of the rolling stock and increasing the service life of the said half-sleepers installed in the developed cover.

The specified technical result is achieved in a reinforced concrete half-sleepers cover, containing a bottom, two side and two end walls connected to each other, forming a shell in the form of a hollow open top and expanding upward truncated pyramid, at the base of the bottom of which there is a trapezoid, according to the utility model, the cover is made of polyurethane.

At the base of each of the side and end walls of the cover lies a trapezoid.

The polyurethane from which the cover is made can have a Shore A hardness in the range of 60 ÷ 100 units.

On the inner surface of the cover, horizontally oriented annular grooves can be made.

The polyurethane from which the cover is made has a Shore A hardness of 70 units.

The set of features of the claimed cover for a reinforced concrete half-sleepers for the subway is in a causal relationship with the achieved technical result and is presented in an independent paragraph of the utility model formula.

The essence of the technical solution is illustrated by the figures.

Fig. 1 - schematically shows a half-sleeper installed in a cover, general view.

Fig. 2 shows a view A in Fig. 1.

Fig. 3 shows the inventive cover, top view.

Fig. 4 shows a section b-b of fig. 3.

Fig. 5 - shows the end wall of the cover with a local section C-C Fig. 3.

6 is an enlarged view D of FIG. 4.

FIG. 7 is an enlarged view E of FIG. 5.

The above figures show:

1- cover;

2- half sleepers;

3- the bottom of the cover 1;

4- side walls of the cover 1;

5- end walls of the cover 1;

6- annular grooves;

7- grooves.

It should be understood that those skilled in the art will be able to suggest other embodiments of the utility model, and that some of its details can be changed in various other aspects without departing from the spirit and scope of the present utility model. Accordingly, the explanatory figures and the detailed description of the reinforced concrete half-sleepers cover for the subway are illustrative but not restrictive.

The inventive cover 1 is an insulator of a reinforced concrete half-sleeper 2 (hereinafter referred to as a half-sleeper) from the ballastless base of the superstructure of the subway railway track (see Figs. 1, 2, 3). Used in subways, the specified half sleeper 2 is made predominantly of a trapezoidal shape.

The characteristics and advantages of the known trapezoidal half-sleepers 2 used in the subway are described in detail in RF patent No. 186427.

The cover 1 is made of elastic polyurethane and contains a bottom 3, two side 4 and two end walls 5, connected to each other, forming a shell in the form of a hollow open top and expanding upward truncated pyramid, at the base of the bottom 3 of which lies a trapezoid (see Fig. 3 , 4, 5). Thus, the cover 1 has an open upper zone N and is made to expand upwardly from the bottom 3 to its upper edge.

At the base of the shape of each of the side 4 and end 5 walls of the cover 1 is a trapezoid.

Cover 1, made of polyurethane with a hardness of Shore A 60 ÷ 100 units, is shock-resistant, durable in industrial operation, has properties that are practically unattainable for a cover made of rubber, namely: elasticity, low abrasion, high strength and wear resistance, vibration resistance , high dielectric properties, which increases the reliability and increases the service life of the specified cover 1 in comparison with a cover made of rubber.

In a specific embodiment, the cover 1 is made of polyurethane with a Shore A hardness of 70 units.

The cover 1 is installed with an interference fit on the half-sleeper 2 in such a way that the half-sleeper 2 is inside the cover 1. In the installed position of the cover 1, the upper belt W1 of the body of the half-sleeper 2 protrudes upward through the open upper zone N of the cover 1 (shell) beyond the specified cover 1, and the lower the base, lower W3 and central W2 belts of the side and end walls of the body of the half-sleeper 2 are tightly covered with a cover 1 (shell), while the elasticity of the support of the said half-sleeper 2 on the bottom 3 of the cover 1. The above-described cover 1 reduces mechanical vibrations of the half-sleeper 2 during the passage of the rolling stock and protects the half sleeper 2 from destruction during its long-term operation.

In the structure of the superstructure of the underground railway track, the half-sleeper 2 can rest on its base directly on an elastic pad (not shown in the figures) installed inside the cover 1 on the bottom 3.

The total height of the lower W3 and central W2 belts of the side and end walls of the half-sleeper body 2 can be 152 ÷ 155 mm. In a specific embodiment, the specified total height is 153 mm (see figure 2).

To reduce mechanical vibrations transmitted to the half sleeper 2 during the passage of the rolling stock, horizontally oriented annular grooves 6 are made on the inner surface of the cover 1, damping these vibrations (see Fig. 6, 7). The specified annular grooves 6 are made along the perimeter of the cover 1. In addition, horizontally oriented grooves 7 can be additionally made on the inner surface of the end walls 5 of the cover 1, which also contribute to damping the vibrations of the half sleepers 2.

In a specific example of the execution of the cover 1, the height H of its side 4 and end 5 walls can be 153 ± 1.5 mm, the length L1 inside the cover 1 in the zone of its maximum expansion (in the upper zone N) can be 650 ± 3 mm, the length L2 of the bottom 3 inside the cover 1 can be 640 ± 2.5 mm, the width S1 of one of the end sides of the bottom 3 inside the cover 1 can be 197 ± 1.5 mm, and the width S2 of the opposite end side of the bottom 3 inside the cover 1 can be 178 ± 1, 5 mm, the width Z1 of one end wall 5 in the zone of its maximum expansion (in the upper zone N) inside the cover 1 can be 212 ± 1.5 mm, and the width Z2 of the second end wall 5 in the zone of maximum expansion (in the upper zone N) inside cover 1 can be 192 ± 1.5 mm. In this case, it should be noted that one of the end walls 5 of the cover 1 has dimensions corresponding to the above parameters S1 and Z1, and the second end wall 5 of the cover 1 has dimensions corresponding to the above parameters S2 and Z2.

The specified cover 1 can be made by injection molding of polyurethane, for example, of the RAVATHANE brand.

The above-described shape of the cover 1 allows it to be installed on a half-sleeper 2 of a trapezoidal shape, which makes it possible to preserve the structurally specified upper structure of the subway railway track for a long time in conditions of intensive operation.

The cover 1 can be installed on the half-sleeper 2, which has a section made to match the shape of the specified cover 1.

The use of the cover 1 described above increases the reliability of the metro tracks and reduces the cost of their repair and maintenance.

Claims (4)

1. Cover of reinforced concrete half sleepers, containing a bottom, two side and two end walls, connected to each other, forming a hollow and open top shell, characterized in that it is made of polyurethane with Shore A hardness from 60 units to 100 units. 2. The cover of the reinforced concrete half sleepers according to claim 1, characterized in that a trapezoid lies at the base of each of the side and end walls. 3. The cover of the reinforced concrete half sleepers according to claim 1, characterized in that horizontally oriented annular grooves are made on the inner surface of the cover. 4. Cover of reinforced concrete half sleepers according to claim 1, characterized in that the polyurethane has a Shore A hardness of 70 units.

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