RU197820U1 - MULTI-CHANNEL CABLE SECTION - Google Patents

Abstract

This technical solution is intended for underground laying of cable lines with voltage up to 20 kV in the conditions of the existing dense urban development and provides cable retention and its protection from mechanical damage. The device is also intended for supplying cable lines to telecommunication wells used for inspections, repairs and maintenance of the cable. A section of a multi-channel conduit made in the form of an elongated molded element containing longitudinal hollow cable channels provided with transverse stiffeners and means for connecting to another section, characterized in that the elongated molded element is additionally provided with longitudinal stiffeners, and the longitudinal hollow cable channels are made mutually insulated . 9 s P. f-ly, 8 ill.

Description

This technical solution is intended for underground laying of cable lines with voltage up to 20 kV in the conditions of the dense urban development and provides cable retention and its protection from mechanical damage. The device is also designed to supply cable lines to telecommunication wells used for inspections, repairs and maintenance of the cable.

The prior art contains information about devices of the same purpose. In particular, the technical solution according to US patent for invention No. 3693664 “Modular cellular conduit assembly (modular cellular prefabricated channel)” is known (Hancock Brick and Tile Co, USA, З. No. 8102770, 10/15/1970, publ. 09/26/1972, IPC H02G9 / 06). According to the description of the proposed technical solution, a modular design is patented for the underground installation of telephone lines, electric power lines, etc. Several solutions are proposed, combined by the following features: corrugated plastic pipes installed side by side, equipped with means to prevent mutual movement in the engaged position. A feature of such a technical solution is the constructive absence of a uniform internal surface. The surface of the device is corrugated, and this does not allow the cable to be laid without additional effort and without deformation of the cable sheath during broaching. In addition, this form of execution of the device does not allow you to control the center distance of the power cables due to the lack of separation space between the channels.

A solution that partially overcomes these drawbacks is the device according to the US application for invention No. 20170299090 "Preformed duct assembly (Preformed channel)" (Forterra Pipe & Precast LLC, USA, З. No. 201662322451, 04/14/2016, publ. 10/19/2017, IPC F16L9 / 20; H02G9 / 04). According to the description of the technical solution, a preformed module for underground cable laying is declared, comprising at least one elongated channel configured to place a cable for data transmission and connection with a similar elongated channel. The connection is made by inserting the nipple end of one elongated channel into the sleeve end of the other. The device is also equipped with dividers that perform the function of stiffeners. The disadvantage of this technical solution is the fastening of the channel on several surfaces. Such a scheme greatly complicates the installation technology and increases the laying time. In addition, after the installation of the structure, provided that there is no stiffener in the junction of the elongated channels, soil pressure and dynamic vibration load from the vehicle can lead to disruption (depressurization) of the junction and filling the internal cavity of the pipes with ground water.

Closest to the proposed technical solution is the device according to the patent of the Russian Federation for utility model No. 141942 "Multichannel element" (CITEL, apt. From r.o., Czech Republic, s. No. 2013113982, 03/22/2013, prior. 03/23/2012, publ. .20.06.2014, IPC H02G3 / 04). According to the description of the technical solution, the utility model relates to a multichannel element, in particular, for the mechanical protection of cables, city and trunk telecommunication networks, power supply networks and other technical infrastructures, which consists of an oblong hollow main body with a rectangular or square cross section, an internal cavity which is separated by at least one intermediate wall extending in the longitudinal direction and at the periphery of which there are stiffening ribs extending in the transverse direction, while connecting pipes are made at the ends of the main body for connecting to the main bodies of adjacent multichannel elements. However, the device is not without drawbacks. In particular, the design feature of the device does not allow controlling the center distance of power cables due to the lack of separation space between the channels. With this implementation of the conduit, the cable can be placed, including, close to both sides to the same dividing wall. Thus, it is possible to reduce the efficiency of energy supply networks by increasing the resistance of the conductor by the electromagnetic field of the adjacent power cable. The device is also unable to operate in the conditions of a short circuit of the cable, since it is not equipped with a heat-resistant lining, and the material from which the insulation of the cable inside is made can adhere to the inner wall of the cable channel during reflow due to a short circuit, which makes it difficult to remove the damaged section.

Thus, the prior art does not contain information about technical solutions that solve a number of technical problems. So, the technical problem solved by the proposed utility model is the creation of a section of a multi-channel conduit that provides the ability to lay several cables or power lines in parallel and protects them from external influences.

The technical problem is solved as follows. The present description provides the construction of a multi-channel conduit section. According to a utility model, the device is made in the form of an elongated molded element containing longitudinal hollow cable channels provided with transverse stiffeners and means for connecting to another section. The elongated molded element is additionally provided with longitudinal stiffeners, and the longitudinal hollow cable channels are mutually insulated.

Common with the analog features are the implementation in the form of an elongated molded element containing longitudinal hollow cable channels, supplying the specified elongated molded element with transverse stiffeners and means for connecting to another section. In general, the technical solution differs from the analogue in that the elongated molded element

In a first particular embodiment, the longitudinal hollow cable ducts have a substantially oval cross-section.

In a second particular embodiment, the longitudinal cable channels have a substantially circular cross section.

In another particular case, the execution of the device is made of a polymeric material.

In clarification of this particular case, the device is made of a polymer difficult to combust self-extinguishing material.

In the sixth particular case of execution, the device is characterized in that the means of connection include a connecting flange made with the possibility of connecting a tongue-groove.

In the seventh particular case of execution, the device is characterized in that the means of connection include a connecting flange made with the possibility of bolt connection.

In the eighth particular embodiment, the device is further characterized in that the inner surface of the at least one longitudinal hollow cable channel comprises a lining layer.

In the ninth particular embodiment, the device is characterized in that the hollow longitudinal cable channel is made with the possibility of connection with a connecting pipe (adapter).

It is advisable to implement the device, further characterized in that on the outer surface of the conduit section applied warning marking.

In the general case, the implementation of the device according to the present utility model comprises a monolithic structure consisting of a plurality of insulated longitudinal hollow cable channels for placing said channels of cables, hoses, and small diameter flexible pipes in the inner space. Implementation of a monolithic structure in the form of a molded element makes it easy to transport, store and install the device. Providing the device with longitudinal hollow cable channels allows you to place shielded cables in insulated channels, thus ensuring the protection of the cable network from external influences. In addition, the implementation of the channels isolated allows you to quickly replace one of the cables, while connecting cable channels into a single design increases the speed and convenience of laying cable ducts. Providing the structure with stiffeners, both longitudinal and transverse, allows to increase the resistance of the device to external influences, providing the ability of the device to function under a layer of earth. Longitudinal ribs also provide directly insulated cable channels with the perception of increased soil load and high load-bearing capacity of the device. The device may contain a different number of longitudinal hollow cable channels: from two or more. It is preferable to use sections with the number of cable channels that is a multiple of two: two, four, six, eight, etc. The number of cable channels is selected based on the needs for laying cable ducts. Conduit sections can also be made rotary, both in the vertical and in the horizontal direction. A more detailed description of an example implementation of a utility model is given below in the description text.

The implementation of hollow insulated cable channels with a round or oval cross-section allows you to place cables, hoses, flexible pipes of the corresponding diameter in the inner space. In addition, this cross-sectional shape allows you to place a cable or similar network element in the inner space of the channel, centering it due to the action of gravity.

The implementation of the device from a polymer material allows you to produce complex in shape and, at the same time, durable device that can withstand a wide range of operating conditions.

The use of a flame-retardant self-extinguishing polymer composition as a material ensures the safety of the device when laying power cables or similar elements. If a spark occurs or when open burning begins, the use of this material will not allow the flame to spread, exclude further burning and reduce the area of the damaged cable section, which, in turn, will reduce material costs for its repair.

Performing the connection of sections on the principle of a groove-thorn allows you to connect separate sections of the conduit to each other to obtain cable ducts of the required length. Connection type provides quick docking of sections.

The bolted type of connection provides a reliable connection of conduit sections in a single design. The use of bolted connections reduces the requirements for the accuracy of fitting sections of the conduit, as well as the requirements for the qualifications of personnel involved in laying cable ducts.

The implementation of the docking means in the form of a flange provides a tight docking of the mating surfaces of the conduit sections.

Processing the composition or supplying the inner surface of the cable channel with a lining layer allows you to get the surface of the cable channel, preventing the cable from burning during emergency overloads, heating and melting of the cable braid and preventing the spread of burning of the outer sheaths of the cable when a flame occurs.

The implementation of the cable channel with the ability to connect with the pipe, which performs the function of the adapter, allows you to dock the conduit section with other cable duct systems. The adapter provides the transition from the cross-sectional shape of the conduit section to the cross-sectional shape of another cable duct system.

Applying preventive marking can improve the safety of operation of the device when functioning as part of cable ducts. This allows you to notify persons carrying out earthwork in places where the cable laid using sections of the conduit.

The proposed utility model is illustrated by the following figures:

FIG. 1 - section of the conduit with two cable channels, the main view;

FIG. 2 - section of the conduit with two cable channels, side view;

FIG. 3 - section of the conduit with two cable channels, front view;

FIG. 4 - section of the conduit with four cable channels, the main view;

FIG. 5 - section of the conduit with four cable channels, side view;

FIG. 6 - section of the conduit with four cable channels, front view;

FIG. 7 - rotary section of the conduit with four cable channels;

FIG. 8 - rotary section of the conduit with two cable channels;

The following positions are indicated in the figures:

1 - section of a multi-channel conduit;

2 - longitudinal hollow cable channel;

3 - transverse stiffener;

4 - longitudinal stiffener;

5 - means of docking;

To understand the operating principles and features of various implementations of the utility model, the following is a description of the figures of the technical solution. Although the description text explains in detail the preferred options for implementing the technical solution, it must be understood that other options for implementing the utility model are possible. Accordingly, there is no need to limit the scope of legal protection of a technical solution exclusively to the presented implementations and lists of nodes and components. The utility model can be implemented in other ways. However, when describing the preferred options for technical solutions, for clarity of understanding of the basic principles of a utility model by a specialist, it is necessary to clarify the terms used in the description.

It should be noted that the nodes and parts of the device used in the singular in the description and formula also represent multiple forms, unless expressly stated otherwise. For example, an indication of a constituent element of a device also means an indication of the totality (set) of such elements.

Also, when describing preferred embodiments, special terms are used to provide clarity of understanding. The term is intended to be used in the broadest sense in which it can be construed by those skilled in the art and includes all technical equivalents used in the same way and for the same purpose. So, in particular, the term "section" means one of the sections of the structure, in particular, underground cable ducts. As conceived by the authors of this technical solution, the word "section" is similar to the word "module". The term "multichannel" includes the use of two or more channels in a section. The number of channels is regulated by production necessity, economic feasibility and technical limitations of production. It is possible to use sections in tandem, i.e. parallel laying of the cable duct line. The term “cable channel” characterizes a cylindrical body that is isolated from the environment by a wall, but open at the ends to accommodate a cable or similar device in its inner space: a flexible hose, tube, and items The term "means of connection" means a certain set of elements that are interconnected, intended for joining and subsequent connection with a similar section of a multi-channel conduit. The term “insulated” as applied to a hollow cable channel means that the device placed in the internal volume of the cable channel does not come into contact with a similar device placed in the other channel, and also that the outer part of the wall of the cable channel is essentially does not come into contact with the wall of another cable channel as part of the conduit section. The term “adapter pipe” is used to identify a device designed to dock a cable channel with another cable duct system.

The words “consisting”, “comprising”, “including” mean that at least the specified component, element, part or step of the method is present in the composition, object or method, but does not exclude the presence of other components, materials, parts, steps of the method, even if such a component, material, part, step of the method performs the same function as the specified.

The materials from which various elements of the present utility model are made, indicated below when describing examples of a specific embodiment of the device, are typical, but not required for use. The materials indicated in these examples may be replaced by numerous analogs that perform the same function as the examples of materials described in the description.

Turn to the attached figures. In FIG. 1-3 shows a section of a multi-channel conduit in accordance with one of the specific implementations of this utility model.

The multichannel conduit section is manufactured by injection molding from a polymer composition based on high and low pressure polyethylene and modifying additives, including flame retardants0. The section is painted black. For coloring, pigment superconcentrates intended for polymers are used. The devices are used for laying cable lines that are constantly operated at temperatures up to plus 95 ° С.

The multi-channel conduit section is a cast construction. The length of the standard section is 1000 mm. When mounting the sections are interconnected and form a single sewage system.

The applied polymer composition and device design provides the strength characteristics of the multichannel conduit section, presented in table 1.

Table 1 - Strength characteristics of a multi-channel conduit

No. p / p Name of indicator Value 1 Resistance to compression at destruction, kN / m, not less fifteen 2 Compression resistance during deformation of the inner diameter by 3% of the initial value, kN / m, not less 5 3 Compression resistance during deformation of the inner diameter by 5% of the initial value, kN / m, not less 6.5 4 Ring stiffness, kN / m ² , not less 32 5 Impact resistance, J, not less 49 6 Operating temperature without deformation, ° С, not less 95

The insulation resistance of the material of the longitudinal hollow cable channel is more than 100 MΩ.

Longitudinal hollow cable channels designed for laying power cables have a two-layer design. The inner layer is made of ceramic material providing fire-fighting characteristics.

On the connecting flanges of the conduit sections, silicone gaskets are installed, which ensure that the sections are joined into a single cable duct system to protect them from dust and moisture. The degree of protection of the device meets the requirements of at least IP55.

Laying sections of a multichannel conduit is carried out on a surface prepared for this, for example, in a trench, with underground sewage laying. Installation of sections (docking of sections among themselves) is carried out in the following sequence: set the section in a horizontal position; in the mounting flange "groove" in each seat set silicone sealant; bring the second section at an angle of 30 ° side with a connecting stud flange, hook the connecting flanges in the form of a stud-groove; lower the section to a horizontal position; installation of the next section is carried out in a similar manner. If the device is equipped with means of connection, including a flange with holes for bolting, the installation of conduit sections is carried out as follows: set the section in a horizontal position; in the mounting flange, a silicone sealant is installed in each seat; bring the second section; join the sections to the mating holes for bolted connections; tighten the conduit sections with bolts; installation of the next section is carried out in a similar manner.

Depending on the purpose of the cable being laid, the designs of multichannel conduits are divided into three types:

- low-current multichannel conduit section, designed for laying low-voltage cables, such as: telephone, television, radio, fiber optic, control, etc .;

- power multi-channel conduit section, designed for laying power cables with voltage up to 20 kV;

- multichannel conduit section combined designed for the simultaneous installation of several types of cables.

The options for implementing this utility model are not limited to the above examples of specific performance. Other forms of implementing a technical solution may be proposed without moving away from the meaning of the utility model. However, some configurations have been disclosed in the present description.

The exemplary embodiments disclosed above are given in order to show the industrial applicability of the device and give a general impression of the capabilities of the proposed device. The scope of legal protection of a technical solution is determined by the formula of the utility model, and not the description provided, and all changes made with the use of equivalent features are subject to the legal protection of this utility model.

Claims (10)

1. Section of a multichannel conduit made in the form of an elongated molded element containing longitudinal hollow cable channels equipped with transverse stiffeners and means for connecting to another section, characterized in that the elongated molded element is additionally equipped with longitudinal stiffeners, and longitudinal hollow cable channels are made mutually isolated. 2. Section according to claim 1, characterized in that the longitudinal hollow cable channels have a substantially oval cross-section. 3. The section according to claim 1, characterized in that the longitudinal hollow cable channels have a substantially circular cross section. 4. Section according to claim 1, characterized in that the device is made of a polymeric material. 5. Section according to claim 1, characterized in that the device is made of a polymer flame-retardant self-extinguishing material. 6. Section according to claim 1, characterized in that the connecting means include a connecting flange made with the possibility of connecting a tongue-groove. 7. Section under item 1, characterized in that the means of connection include a connecting flange made with the possibility of bolt connection. 8. Section according to claim 1, characterized in that the inner surface of the at least one longitudinal hollow cable channel contains a lining layer. 9. Section according to claim 1, characterized in that the longitudinal hollow cable channel is made with the possibility of connection with a connecting pipe (adapter). 10. The section according to claim 1, characterized in that on the outer surface of the multichannel conduit section a warning mark is applied.

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