RU172857U1 - COMBINED CABLE FOR CCTV SYSTEMS - Google Patents

Abstract

The utility model relates to the field of production of cables intended for the transmission of electrical energy, as well as the transmission of a high-frequency signal for digital video surveillance systems. The cable for video surveillance systems includes a power and digital component coated with an external insulator of circular cross section, while the power component consists of two adjacent and equidistantly laid conductive strands, each of which consists of several copper wires twisted into a bundle, coated with PVC plastic, and the digital component represents a few pairs of conductive insulated conductors connected in a single bundle, tightly wrapped in a shell. EFFECT: improved cable performance.

Description

The utility model relates to the field of production of cables intended for transmission of electrical energy, control signals, as well as transmission of a high-frequency signal in digital video surveillance systems.

Various cable designs are known in the art.

For example, in RU 2284594 C1, 09/27/2006 a cable is disclosed containing a sheath in which several pairs of conductive insulated conductors are placed. However, it contains only the digital component. The power component is absent in it. As a result, you have to lay the power wire with this cable.

A combined cable is known from CN 201185101 Y, 01/21/2009, in which the problem of the previous cable is solved, and which can simultaneously transmit a video signal and a power signal. However, the digital component and the power component are each located in a separate shell, which are interconnected along a narrow strip, which causes some inconvenience during its installation and operation, since it has different bending resistance in different planes.

The closest in technical essence and combination of essential features to the claimed utility model is the combined cable disclosed in JP N 10234661 A, 09/08/1998, which inside the circular sheath contains digital and power components. However, in it pairs of conductive isolated conductors of the digital component are placed without a single protective sheath uniting them, which can lead to instability of the transmitted signal, and the power component consists of a pair of insulated wires, which can lead to unreliable power transmission, since frequent bending of single wires can lead to tearing them apart.

The technical problem to which the claimed utility model is directed is to create a cable that is resistant to tearing and adverse external factors, while maintaining stability during signal transmission, convenient for cutting and installation in any conditions.

The technical result of the claimed utility model is the improvement of cable performance.

The claimed technical result is solved as follows:

The combined cable for video surveillance systems includes a power and digital component coated with an external insulator of circular cross section, while the power component is two adjacent and equidistantly laid conductive strands, each of which consists of several copper wires twisted into a bundle, coated with PVC plastic, and the digital component represents several pairs of conductive isolated conductors connected in a single bundle tightly wrapped in a shell.

The following features characterize a utility model in particular cases, in specific forms of performing the claimed utility model:

- the cores of each of the mentioned pairs of cores forming the digital component are stacked in a twisted manner;

- individual pairs of the cores mentioned are twisted together with unequal and non-multiple steps relative to each other;

- the mentioned pairs of cores are twisted together, forming a strand in increments of 50 to 200 mm;

- said digital component is two pairs of conductive insulated cores;

- said digital component is three pairs of conductive insulated cores;

- said digital component is four pairs of conductive insulated cores;

- the diameter of each of the cores forming a digital component is 0.44-0.64 mm;

- the diameter of each of the aforementioned copper cores forming conductive strands of the power component is 0.2 mm;

- said shell, in which said bundle of conductive insulated cores forming a digital component is tightly wrapped, is made of PVC compound;

- said shell, in which said bundle of conductive insulated cores forming a digital component is tightly wrapped, made of polyethylene;

- said shell, in which said bundle of conductive insulated cores forming a digital component is tightly wrapped, is made of a polymer material;

- said polymer material is made in the form of a polyethylene terephthalate film;

- said shell, in which said bundle of conductive insulated cores forming a digital component is tightly wrapped, is made of a shielding tape;

- the said sheath, in which the said bundle of conductive insulated conductors forming a digital component is tightly wrapped, is made of a shielding braid;

- the said conductive strands, each of which consists of seven copper wires twisted into a bundle;

- the said conductive strands, each of which consists of sixteen copper wires twisted into a bundle;

- said conductive strands, each of which consists of twenty-four twisted into a bundle of copper wires;

- the aforementioned shielding braid is made of 24 copper cores;

- the diameter of each of the aforementioned copper wires of the shielding braid is 0.1-0.12 mm;

- said external insulator is made of a conventional polymer, or a polymer of increased fire resistance and / or reduced smoke and gas emission with the addition of a heat stabilizer and a light stabilizer - carbon black.

These features are significant and interconnected with the formation of a stable set of essential features sufficient to solve the problem and solve the technical result.

The possibility of implementing a utility model, characterized by the above set of features, as well as the possibility of realizing the purpose of a utility model can be confirmed by the description of a possible device design made in accordance with the utility model, the essence of which is illustrated by graphic material, which shows the following:

FIG. 1 is a structural diagram of the claimed cable with two pairs of conductive insulated cores.

FIG. 2 is a structural diagram of the claimed cable with four pairs of conductive insulated cores.

The combined cable for video surveillance systems includes a power component, which is two adjacent and equidistantly laid conductive strands, each of which consists of several copper wires 1 twisted into a bundle, coated with PVC plastic 3, and a digital component, which is several pairs of conductive coated insulation 4 veins 2, connected in a single bundle, tightly wrapped in a sheath 6. All these conductive strands covered with PVC plastic 3 and a bundle wrapped in a sheath 6 isolated cores 2 are covered with an external polymer insulator of circular cross section 5.

In this case, the twisting step is understood to mean the length of one full turn of a spiral formed along the longitudinal axis of the cable by one of its components.

The twisting steps of individual pairs in an elementary bundle should not be equal (unequal) and not multiple to each other to reduce the mutual influence between the chains.

Multiplicity - the ability of a divisible number to divide by a number - a divisor without a remainder.

Twisting the pairs into a bundle facilitates the mutual movement of the cores during cable bends and provides it with a more stable and round shape.

A bundle pitch of less than 50 mm should not be used due to a significant increase in the consumption of the workpiece per linear meter of the product and a corresponding deterioration in the electrical parameters of the finished cable.

A bundle pitch of more than 200 mm should not be used because of a violation of the uniformity and round shape of the cable core. In other words, with twisting steps of more than 200 mm, the meaning of twisting into a bundle is lost.

Conducting wires of signal pairs can have continuous polyethylene insulation of various colors, twisted into pairs with coordinated twisting steps.

The outer shell can be made of black polyethylene for external laying, or PVC plastic compound, which spreads combustion (NG), and / or increased fire resistance (FR), and / or reduced smoke and gas emission (LS), and / or reduced activity of smoke and gas products (HF ) for internal laying, or with the addition of a thermostabilizer and a light stabilizer - carbon black for laying the cable in the open.

Two power wires with a cross-section of 0.5 or 0.75 mm ² are insulated with PVC compound.

The best manufacturing method of the claimed cable is as follows.

The copper wire of 1 strand is made of MM 24 × 0.2 TU 16-705.492-2005, with a total cross section of 0.75 sq. Mm.

Core 2 - D = 0.52 mm, cross section 0.21 sq. Mm, made of copper wire MM TU 16-705.492-2005.

Insulation of 3 strands - PVC compound I40-13A GOST 5960-72.

Shell 5 of the external insulator: HDPE light stabilized grade 153-10K GOST 16336-2013.

Shell 6 (beam 2 lived) - PVC plastic.

CONSTRUCTION DIMENSIONS

ELECTRICAL PARAMETERS

Frequency characteristics of transmission parameters and mutual influence of signal pairs

The advantages of the proposed cable are as follows:

By using the claimed cable, the necessary reduction of material and labor costs is achieved due to the fact that two cables are combined in one cable: digital (twisted pair for transmitting a high-frequency signal) and power (power supply to the camera). There is no need to coordinate and lay the power line of the camcorder. There is no need for a double set of fasteners, suspensions. In addition, the cable is resistant to tearing and adverse external factors, convenient for cutting and installation in any conditions without the use of special tools.

The cable can be widely used in the organization of video surveillance systems of enterprises, organizations and private households.

The claimed utility model is industrially applicable, since its implementation does not require materials and technologies not known from the prior art today.

The cable construction described in this example and shown on graphic materials is not the only one possible to solve the above problem and achieve the above technical result and does not exclude other options for its manufacture containing a combination of features included in an independent claim of the utility model.

Claims (21)

1. Combined cable for video surveillance systems, including a power and digital component, coated with an external insulator of circular cross section, characterized in that the power component is two adjacent and equidistantly laid conductive strands, each of which consists of several PVC coated copper wires twisted into a bundle plastic compound, and the digital component consists of several pairs of conductive insulated conductors connected in a single bundle, tightly wrapped in a shell. 2. The cable according to claim 1, characterized in that each of said conductive strands consists of seven copper wires twisted into a bundle. 3. The cable according to claim 1, characterized in that each of said conductive strands consists of sixteen copper wires twisted into a bundle. 4 Cable according to claim 1, characterized in that each of the aforementioned conductive strands consists of twenty-four twisted into a bundle of copper wires. 5. The cable according to claim 1, characterized in that the cores of each of the aforementioned pairs of cores forming the digital component are stacked in a twisted manner. 6. The cable according to claim 5, characterized in that the individual pairs of the cores mentioned are twisted together with unequal and non-multiple steps relative to each other. 7. The cable according to claim 6, characterized in that the said pairs of cores are twisted together, forming a strand in increments of 50 to 200 mm. 8. The cable according to claim 1, characterized in that said digital component is two pairs of conductive insulated cores. 9. The cable according to claim 1, characterized in that said digital component is three pairs of conductive insulated cores. 10. The cable according to claim 1, characterized in that said digital component is four pairs of conductive insulated cores. 11. The cable according to claim 1, characterized in that the diameter of each of the cores forming a digital component is 0.44-0.64 mm. 12. The cable according to claim 1, characterized in that the diameter of each of the aforementioned copper conductors forming the conductive strands of the power component is 0.2 mm. 13. The cable according to claim 1, characterized in that the said sheath, in which the said bundle of conductive insulated conductors forming a digital component is tightly wrapped, is made of PVC compound. 14. The cable according to claim 1, characterized in that the said sheath, in which the said bundle of conductive isolated conductors that form the digital component are tightly wrapped, is made of polyethylene. 15. The cable according to claim 1, characterized in that said sheath, in which said bundle of conductive insulated conductors forming a digital component is tightly wrapped, is made of a polymer material. 16. The cable according to claim 15, characterized in that said polymeric material is made in the form of a polyethylene terephthalate film. 17. The cable according to claim 1, characterized in that the said sheath, in which the said bundle of conductive insulated conductors forming a digital component is tightly wrapped, is made of a shielding tape. 18. The cable according to claim 1, characterized in that said sheath, in which said bundle of conductive insulated conductors, forming a digital component, is tightly wrapped, is made of a shielding braid. 19. The cable according to claim 18, characterized in that the said shielding braid is made of 24 copper cores. 20. The cable according to claim 19, characterized in that the diameter of each of the aforementioned copper wires of the shielding braid is 0.1-0.12 mm. 21. The cable according to claim 1, characterized in that the said external insulator is made of a conventional polymer, or a polymer of increased fire resistance and / or reduced smoke and gas emission with the addition of a heat stabilizer and light stabilizer - carbon black.

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