Vapor-tight cable for high-speed communications and its manufacturing process

FIELD: multiple twin cables for communications in local network.

SUBSTANCE: proposed multiple twin cable designed to prevent vapor transfer when immersed in petroleum oil has internal and external sheaths that cover insulated signal-transferring conductors and are made in the form of helical structure. Core filler fills up core and spaces between signal transferring conductors. Core filler and internal sheath are made of vapor-tight material and fixed to insulated conductors so that they fill up all grooves and slots around signal transferring conductors. External gas-tight sheath can be provided to make it possible to immerse cable in petroleum oil for long time intervals without impairing its functional capabilities.

EFFECT: ability of preventing vapor transfer lengthwise of cable.

26 cl, 4 dwg

 

Preferred embodiments of the present invention relate, in General, to the cable connections in the field of communications and electronic equipment and, in particular, vapor-proof cable, which is used, for example, as a cable for high speed connection and interconnection, as well as to its method of preparation.

Currently, communication cables and cables for electronic equipment is widely used in a variety of applications, many of which a necessary condition is the possibility of transmission by cable of high-frequency signals over long distances. Range of operating frequencies of modern cable far exceeds the range, which is required for legacy applications that, in particular, by the development of electronic equipment and communication equipment. In addition, in modern applications, it is necessary that the cable could function in much harsher environments than previously.

Have been proposed such applied problems in the field of communications and electronic equipment, for which the necessary cables, providing support for network protocols Ethernet when they dive for a long time in liquid, such as oil, gas, water, etc. At least one of the applications is one in which CE is Evie cables installed at petrol stations for connecting electronic circuits pumps for fuel and equipment cash terminal (CT) (POS) point of sale between them. The relationship between equipment POS terminal and pump to supply fuel to provide through data transfer Protocol Ethernet network, for example, corresponding to a standard 10Base-T specification IEEE 802.3 Institute of engineers on electrical and electronics USA (IEEE) (IEEE 802.3 10Base-T). The connecting cable used in petrol stations, exposed to oil vapors and in some cases, it may be immersed in the fuel. The cable can also be used for other data transfer protocols, including communication in asynchronous transfer mode.

In local networks, for example, those that use at petrol stations, as the connecting cable first used the cables 5-th category. 5-I category is a standard published jointly by the American national standards Institute, USA (ANSI) and the Association of communications industry / electronics industry Association of the USA (TIA/EIA). Conventional cable 5-th category contains twisted group of insulated conductors. Each of the twisted group may contain two or more conductors forming a pair. Cable type twisted pair contains air gaps between the inner surface of the sheath of the cable and insulated wire is kami of twisted pairs. Cable type twisted pair also contains a hollow core disposed between the multiple twisted pairs of insulated conductors inside the cable. The presence of both air gaps and hollow core facilitates the flow of fumes or vapors along the cable. Therefore, there is a potential possibility that the cable may serve as a means of transfer of explosive vapors from the pump at the premises where sold.

In the past, attempts have been made to create a vapor tight cable 5-th category, impeding the flow of vapor in a petrol station and meet the requirements of safety regulations. One known method includes the operation of removing the cable sheath in many separate parts of the cable along the length of the laid cable in which insulated conductors are exposed. The wires in each of the open areas, causing the sealing substance, whereby to form a seal preventing the entry of fumes. To create a sequence of individual or sectional vapour barrier seal applying the sealing substance is carried out in many specific points along the cable length. Since the sealing substance may have cracks or the result of improper application, resulting fumes can penetrate into the cable and pass through the vapour barrier seal, it is necessary to form many vapour barrier seals. There is also the possibility of damage to the shell in the area between the filling station and any given vapour barrier seal, resulting fumes can penetrate the shell and extend upward from the vapour barrier seal towards the petrol station. The existing technology of removing the sheath from the cable and adding sealant materials is time-consuming, expensive and unreliable and, therefore, is undesirable.

Figure 1 shows the cable 5 category, which up to the present time used for inter-component connections in networks with asynchronous data transfer (ATM) and in the networks of the Ethernet standard. The cable 10 comprises a shell 12 within which are four twisted pairs 14-17 conductors arranged in the form of a spiral structure and arranged around the hollow core 18. Twisted-pair 14-17 contact with each other and with the inner surface 20 of the shell 12. Mutual relative positions of the twisted pair 14-17 remains essentially unchanged. Besides, twisted-pair 14-17 twisted in such a way that they form a one big spiral. The outer boundary of each twisted pair 14-17 about what is meant by the line 28. The cable 10 contains several peripheral air gaps 24-27, located between the inner surface 20 of the shell 12 and the outer peripheral sections of the twisted pairs 14 to 17, and air gaps 38, inside each twisted pair 14-17, due to the characteristic properties of the spiral itself.

Each twisted pair 14-17 contains two wires 30 and 32, which are covered with respective insulating materials 34 and 36, respectively. Also there may be explosive cord (not shown), located near the inner surface 20 of the shell 12. Wires 30 and 32 are made of copper and insulating materials 34 and 36 are made of a dielectric constituting the polyolefin or fluorinated polymer. The shell 12 are made of polyvinyl chloride (PVC) (PVC) for casting upward flow or high pressure or from a fluorine-containing polymer.

The cable 10 to provide a specific geometric shape and are made of materials having the desired combination of electrical and physical characteristics, which interact with each other in a certain way. The total set of geometrical characteristics and material characteristics allows to obtain such physical and electrical parameters that satisfy the requirements of the standard 5-th category. Therefore, the cable 10 is omitted for application in the areas of communication and electronic engineering, require the use of cables 5-th category.

The presence of air in the core 18 and the gaps 24-27 and 38 of the cable 10 provides obtaining the set of electrical parameters. The geometric configuration and the dielectric constant of the substances used in the cable 10, and the dielectric constant of the air in the core 18 and the air gap 24 to 27 and 38 interact in such a way that allow to achieve the required impedance and to minimize crosstalk between signals, which is transmitted via twisted pairs 14 to 17, as well as to minimize the attenuation and phase shift. Consequently, the presence of air contained in the cable 10, is a necessary and desirable condition for cables 5-th category. As an example, may be given the option of cable 10 having a standard electrical parameters.

By introducing air into the space around the insulated conductors 14-17 cable 10 may be designed so that it meets the requirements of the standard industry Association communications / electronic industry Association U.S. No. 568-A (TIA/EIA-568-A) for cables 5-th category.

In some applications for networks can be used for data transmission protocols that differ from the standard 5-th category. For example, in some networks, Ethernet use the hat a data transmission protocols, which correspond to the less stringent standard, such as standard 10Base-T. for Example, in Ethernet, used in petrol stations, similar to that which was described in the example above, can be used with the data transfer Protocol that meets the requirements of the standard 10Base-T.

Currently, there remains a need in the launch of the enhanced network cable, which is vapor - and gas-tight, and also provides electrical parameters required for high-speed data transmission. I believe that the preferred embodiments of the present invention can satisfy this need and to overcome other disadvantages of conventional cables, which will become more apparent from the following description.

The INVENTION

According to at least one of the preferred embodiments of the present invention provides a cable with chetverochka twisted-containing shell and at least one of the four insulated conductors, which carry out signal transmission enclosed in a shell. Insulated conductors, which carry out signal transmission contact with each other and arranged in the form of a spiral structure, which limits a hollow, Serdtsev is at. Hollow core, essentially, filled with vapour barrier filler. The shell and the filler fills the gaps and cracks around each insulated conductor, forming a tight seal along the entire length of insulated conductors, which carry out signal transmission, thereby preventing the flow of vapor along the cable. In one of the embodiments of the invention, the shell contains an external gas-tight shell and inner shell, and in another embodiment, the shell contains one single shell. In both cases, the implementation of a single shell and the inner shell have a dielectric constant greater than the dielectric constant of the insulation material on isolated conductors, which carry out signal transmission that provides the required electrical parameters. The shell consists of extruded under pressure composition, essentially filling a void between the insulated conductors, which carry out signal transmission. The shell may also contain an outer layer of nylon, which is essentially impermeable to gases. Vapour barrier filler is a core obtained by broaching and located between izolirovani the mi conductors, at which carry out the signal transmission, so that it essentially fills the hollow core and the space between the insulated conductors, which carry out signal transmission. According to one of preferred embodiments of the invention, the core obtained by broaching, created from cotton, while in an alternative embodiment, the core obtained by broaching, form of material representing aramid thread.

In another embodiment of the present invention, a method for manufacturing a cable with chetverochka twisting. The method of manufacture comprises the following stages: four insulated conductors, which carry out the transmission of a signal feature in the form of a spiral and so that they touch each other. Because the insulated conductors, which carry the signal are in the form of a spiral, they limit a hollow core that is between them. The method of manufacturing further comprises the following operation: between insulated conductors, which carry out the transmission of a signal injected vapor filler, essentially filling a hollow core, and the gap between isolated conductors, on which assests the ut signal transmission, moreover, this operation is performed before the final formation of the spiral. After the spiral is formed, insulated conductors are compressed around filler to the core, resulting form a tight seal against the inner edge conductors. The method further contains the following: around the outer edge of the insulated conductors, which carry out the transmission of a signal by extrusion under pressure is applied substance in the form of single or inner shell. As a result of implementation of operations introduction and application form the seal between the insulated conductors, which carry out signal transmission, filler and wrapper, essentially devoid of air gaps, which prevents the flow of vapor along the insulated conductors, which carry out signal transmission.

At least in one of alternative embodiments of the invention the inner shell, located on top of the insulated conductors, which carry out the transmission of a signal formed by the method of extrusion under pressure. The inner shell has a dielectric constant that is higher than the dielectric constant of the insulating material deposited on the insulated conductors, which made tlaut signal transmission. The operation of extrusion under pressure leads to the fact that located around the outer perimeter of the conductors on which the transfer signal, the extruded substance, essentially fills the space between the insulated conductors, which carry out signal transmission. The inner layer may be made of material which is polyvinyl chloride. The inner shell may be enclosed in gas-tight outer layer. The outer layer may be made of material which is nylon.

In one of alternative embodiments of the invention in the operation of introduction between the four insulated conductors, which carry out signal transmission, place the vapour barrier filler, which is carried out before the conductors on which the transfer signal will be arranged in the form of a spiral so that they were in contact with each other. Vapour barrier filler forms a soft compressible core. After vapor filler is properly placed between the four conductors exert compression four conductors and give it the shape of a spiral, or these operations oudestraat in reverse order. In the result of the operation of a vapor compression Napo is the diameter penetrates into the grooves between the conductors.

BRIEF DESCRIPTION of DRAWINGS

The foregoing description of the invention and the following detailed description of preferred embodiments of the present invention will become more clear when considering in conjunction with the attached drawings. For illustrative purposes in the drawings showing the embodiments of which are currently preferred. However, you should realize that the present invention is not limited to those precise options of layout, materials and tools, which are depicted on the attached drawings.

Figure 1 shows a magnified view of the cross-section of traditional cable 5-th category, consisting of a set of differential pairs.

Figure 2 shows a magnified view of the cross-section of the cable with chetverochka twisted, formed in accordance with the preferred embodiment of the present invention.

Figure 3 shows the enlarged view of the cross-section of the cable with chetverochka twisted, formed in accordance with an alternative embodiment of the present invention.

4 shows an enlarged view of the cross-section of the cable is 5-th category, consisting of a set of differential pairs, which is formed in accordance with an alternative embodiment n is standing inventions.

DETAILED description of the INVENTION

Figure 2 shows the preferred implementation of the present invention, namely a cable 100 having a single solitary shell 102, which is located around and encompasses two pairs of insulated conductors 104, on which the transfer signal. Insulated conductors, which carry out signal transmission arranged in the form of a spiral structure and serve as a border for finding between the hollow core. Hollow core, essentially, filled with vapour barrier material 106. Vapour barrier material 106 runs along the entire length of the core, limited conductors 104. Each conductor 104 contains a Central conductive wire 108, around which is an insulating material 110. The wire 108 transfer data, the parameters of which are set according to the network Protocol of the Ethernet standard, for example, for Ethernet, compliant 10Base-T, 100Base-T standard (Specification Institute of electrical engineers and electronics, USA (IEEE) IEEE 802.3us Ethernet with a transmission rate of 100 Mbps on unshielded cable type twisted pair) standard networks with asynchronous data transfer (ATM), etc. Through conductors 104 realize transmission of high frequency signals with speeds lane is giving data at 10 megabits per second, 100 megabits per second and above. For example, via cable 100 may be implemented in data transmission in Ethernet used in petrol station to enable communication between electronic circuit pump for feeding fuel and equipment of the petrol station. Vapour barrier material 106 forms a tight seal with the inner peripheral segments 112-115 insulated conductors 104, on which the transfer signal. Segments 112-115 pass along the entire length of insulated conductors 104, on which the transfer signal. Single single shell 102 forms a tight seal with the outer peripheral segments 116 to 119 of insulated conductors 104, on which the transfer signal. The segments 116 to 119 are along the entire length of insulated conductors 104, on which the transfer signal.

For example, the cable 100 may be designed so that the conductors 104 comprise two pairs of single core wire of tinned copper wire with a diameter of approximately 0,0253 inches, but this option is used only as an example. The insulation material may have a thickness of 0,0083 inches and can be made of material representing toretirement (FEP) (FEP). The insulating material 110 may have an outer diameter equal to 0,042 inches. Pronephros cemy material 106 can be made of cotton or made of a material that representing aramid thread. The shell 102 may have an outer diameter equal to 0.025 inch, and may be made of fuel resistant polyurethane by extrusion under pressure. The cable 100 may have a nominal outer diameter of approximately 0,190 inches. The cable 100 having the above dimensions and made of the above materials, which are given by way of example, meets certain standards for the transmission of data in accordance with a network Protocol of the Ethernet standard, for example, for the local network.

Dimensions, geometrical configuration and the materials used in the cable 100, arranged in such a way as to provide the required electrical parameters such as impedance, signal attenuation, phase shift, capacitance, etc. To ensure the uniformity of the transmission characteristics, physical strength and protection from electromagnetic interference insulated conductors 104, on which the transfer signal is carried out in the form of a spiral structure or twisting. To obtain the desired value of the effective dielectric constant between opposite each other on the diameter of the conductors, which form a differential pair, the values of dielectric permeability vapour barrier material 106 and the shell 102 is ybiraut thus, so it exceeded the value of the dielectric constant of the insulation material 110. The external diameter of the wire 108, the insulating material 110 and the shell 102 is controlled so that the impedance of the cable 100 was within the desired range of values. In the embodiment of the invention shown in figure 2, the cable has a nominal impedance of approximately 100 Ω, measured in the time domain (TDR) or by frequency analysis of the network in the range from 1 MHz to 100 MHz. For example, the cable 100, the maximum value of capacitance between the mismatched pair of signal conductors and ground is approximately 1000 pF (PF)/1000 feet at a frequency of 1 kHz, but this value is given only as an example. For example, the cable 100 may have crosstalk at the near end of the cable (PBCC) (NEXT) and other electrical parameters are listed in the following Table 1, but these values serve only as an example.

Table 1
Frequency (MHz)PBCC (nominal value, dB)
5,028
7,525
10,023
Dielectric strength: Constant voltage 2500 V for 3 seconds
Conductor resistance DC:The maximum value is 28.6 Ohms/1000 feet at 20°C
The imbalance conductor resistance DC:No more than 5%

Figure 3 shows an alternative preferred implementation of the cable 150, which contains the outer shell 152 and the inner shell 154. Inner sheath 154 is located around and hermetically covers a structure of four insulated conductors 156, which perform signal transmission and which serve as a boundary to in between the hollow core. Between insulated conductors 156, which transfer signal, a filler 158 core. Filler 158 of the core, essentially fills the grooves or interstices between the insulated conductors 156, which perform signal transmission. Each insulated conductor 156 by which the transfer signal contains a wire 160, around which is an insulating material 162. Filler 158 core formed from compressible fibers, for example cotton, aramid yarn or any similar material, which has properties that significantly impede the festival is the Denia vapors. In the case where the filler 158 core formed from material representing aramid yarn, filler 158 core also provides additional strength to the whole structure of the cable 150. Inner shell 154 around the insulated conductors 156, on which the transfer signal is formed by the method of extrusion under pressure. Inner sheath 154 is made of material, which is a polyvinyl chloride (PVC) (PVC), which can be stretched under the action of pressure. The outer shell 152 may be made of nylon or similar material that is resistant or impervious to gas and oil (for example, does not absorb or swell). Filler 158 core forms a hermetic seal with the inner peripheral segments 172-175 insulated conductors 156, which perform signal transmission. Segments 172-175 pass through the entire length of the insulated conductors 156, which perform signal transmission. Inner sheath 154 forms a tight seal with the outer peripheral segments 176-179 insulated conductors 156, which perform signal transmission. Segments 176-179 pass through the entire length of the insulated conductors 156, which perform signal transmission.

In the case when the outer shell 152 forms the t of nylon or other material, dielectric constant than the dielectric constant of the insulation material 162, the inner shell 154 must be done in such a way that its outer diameter was sufficient to provide a large enough, a predefined distance between the inner diameter 153 of the outer shell 152 and insulated conductors 156, which transfer the signal to prevent excessive adverse effects of the outer shell 152 on the electrical parameters of the cable 150. Nylon usually has a higher dielectric constant as compared with the dielectric constant insulating material 162. In addition, the dielectric constant of nylon and PVC may vary depending on the frequency of transmitted signals, the effects of which are nylon and PVC. Therefore, if you are using cable 150 for data transmission in Ethernet using high-frequency signals, if the outer shell 152 is located too close to the insulated conductors 156, on which the transfer signal, the information signal can affect the dielectric constant of the nylon in the outer shell 152. Changes in the dielectric constant lead to changes in attenuation, full resistance is, capacity, etc. that result in loss, causing signal distortion and increasing the frequency of error bits. For example, the internal layer 154 may have a thickness sufficient to ensure that the internal diameter 153 of the outer shell 152 was at a distance d from isolated conductors 156, which perform signal transmission.

Inner shell 154 are made of PVC, which has a higher dielectric constant than the dielectric constant of the insulation of conductors 156, which perform signal transmission. Insulating material 162, representing toretirement (FEP) (FEP), has a constant dielectric permittivity, which remains constant regardless of the frequency of the transmitted signal. Therefore, the insulating material 110 allows to implement the agreed full resistance, low capacitance and other required electrical parameters.

The cable 150, made in accordance with the above geometric configuration of the above materials and having the above dimensions, satisfies at least the standard 10Base-T data transmission in an Ethernet network. It is clear that the geometrical configuration, materials and dimensions can vary within a certain range, and at the same time, however, will own udeni requirements of the standard 10Base-T. The cable 150 satisfies the test requirements for resistance to pairs set forth in paragraph 22.17 section 36A of standard UL-87 Laboratory safety (USA). The outer shell 154 meets the test requirements for tightness to gases and oil immersion, which are outlined in the standard 758 Laboratory safety (USA).

For example, the wires 160 may be a single core wire of tinned copper inner diameter which is equal to approximately 0,0253 inch or 0.024 inch. Insulating material 162 may have a thickness of 0,0083 inches and may be made of theretransparent (FEP) (FEP), perforamce (APF) (PFA), polyolefin or other material with a low dielectric constant, whereby to form insulated conductors 156, which perform signal transmission with external diameters, respectively 0,042 and 0,037 inches, but these values are given only as an example. For example, the internal layer 154 may have an outer diameter that is sufficient to ensure that the distance d between the insulated conductors 156, on which the transfer signal, and the outer shell 152 is approximately 0.020 inch, but it is given only as an example. Inner sheath 154 can be performed is C polyvinyl chloride, applied by extrusion under pressure. The outer shell 152 can be made having a thickness of 0.005 inches and can be created from a material which is nylon. Outer diameter is given as an example of the cable 150 having the above dimensions, equal 0,155 inch cable, which contains 22 standardized Explorer, and 0,140 inch cable containing 24 standardized Explorer. The cable 150 provides electrical parameters in the following Table 2.

Table 2
Differential impedance:The nominal value of 100 Ω, measured in the time domain
Detuning capacitance between the couple and the earth:The maximum value is 1000 pF/1000 ft at 1 kHz
Frequency (MHz)PBCC (nominal value, dB)
5,028
7,525
10,023
Dielectric strength:Constant voltage 2500 V for 3 seconds
Conductor resistance DC:The maximum value is 28.6 Ohms/1000 feet at 10°C
The imbalance conductor resistance DC:No more than 5%

The cables 100 and 150 of Figure 2 and Figure 3 can be manufactured in accordance with the following alternative implementation. First, through the forming device chetverochka twisting simultaneously stretch four conductor 104, 156, according to which the transfer signal, and compressible vapour barrier material 106 or filler 158 core. The forming device chetverochka twisting performs compression conductors 104, 156 with each other and with vapour barrier material 106 or filler 158 of the core, while the twisted conductors 104, 156 in the form of a spiral or chetverochka twisting. Since compression of the conductors 104, 156 exercise together, this vapour barrier material 106 or filler 158 core pressed or give him so that he penetrated into the cracks and gaps between the conductors 104, 156 and formed a tight seal with the inner and outer peripheral segments 112-115, 172-175 and 116-119, 176-179.

Then carry out the extrusion coating of plastic composition under pressure around the conductors 104, 156, whereby to form a single shell 102 or the inner shell 154. The process of extrusion under pressure provides the penetration of plastic what about the composition into the voids between the conductors 104, 156 and around them. The thickness of the insulating material 110, 162 and dimensions of a single shell 102 or the inner shell 154 is controlled so that through all this together to provide the required electrical parameters. Vapour barrier material 106 or filler 158 core subsequently fills all voids within the cable 100, 150 along its length.

It is clear that in the practical implementation of the preferred embodiments of the present invention does not necessarily use the above specific amounts and specific materials. Instead, various components can be used in a variety of materials, whose properties vary within a certain range, and different sizes within a certain range of values, while maintaining the benefits of the preferred options for implementation of the present invention. For example, the following Table 3 lists examples of ranges of parameters for materials used in accordance with a preferred variant implementation of Figure 3.

Table 3
The preferred value of the dielectric constantThe optimal range diele the electrical permeability Valid range the dielectric constant
Insulation material2,011,8-2,21,5-2,9
The inner Shell4,23.9 to 4.52,3-6,1
The outer Shell3,503,0-4,02,0-5,0

The ranges of values of dielectric permittivity, are listed in Table 3, are given only as examples and are intended for use in conjunction with the above examples of materials and sizes in relation to Figure 2 and Figure 3. It is clear that the preferred value, the optimum range of values and the allowable range of values of the dielectric constant is different for different materials and sizes.

In addition, the geometrical configuration, materials and sizes of the cables 100 and 150 can be modified and altered in such a way that they meet the requirements of other standards in the field of communications and/or electronic equipment, provided that such modification still allows you to get a cable that will protect you from the flowing vapor, which has the required electrical parameters for the transmission of high frequency signals.

Figure 4 shows an alternative implementation of the present invention. P is izlozhennyi cable 210 is designed to transmit signals and information exchange, for example, defined by a standard 5-th category, etc.. Cable 210 contains a shell 212, which covers a lot of twisted pairs 214-217 conductors arranged in the form of a spiral structure. The twisted insulated conductors 222 and 224 in each twisted pair 214-217 carry out so that they were inside of the outer border, which is specified by line 228. Then do the twist of the twisted pair 214-217, creating one big spiral. Each twisted pair 214-217 has gaps between the wires inside the boundaries 228. The gaps between wires within each twisted pair 214-217 filled with filler 238 gaps within a pair. Between the borders 228 adjacent twisted pairs 214-217 and an inner diameter 220 of the shell 212 create an external peripheral air gaps. Peripheral gaps filled with filler 240 gaps between the pairs. The core is filled with filler 218 core.

Filler 218 of the core, the filler 238 gaps within a pair and the filler 240 gaps between pairs interact in such a way that provide a watertight lining of insulated conductors 222 and 224 each twisted pair 214-217. The above method eliminates essentially all air gaps inside the shell 212 along the length of the cable 210.

For example, the filling of gaps 238 within a pair for each twisted pair 214-217 can be made of cotton, Ramenas threads and the like, but these materials are provided only as an example. Similarly, the filler 218 of the core may also be made of cotton, aramid yarn, etc. Fillers 240 peripheral gaps between the pairs can be made of plastics, such as PVC, etc. by extrusion under pressure. Can be added gastight shell 212, but it is not mandatory. In an alternative embodiment of the invention, fillers 240 peripheral gaps between the pairs obtained by extrusion under pressure, may be performed in such a way that fills more space, fully covering a twisted-pair 214-217, for example, like that shown in Figure 3 the inner shell 156 to close her thin outer shell or without it.

According to another alternative implementation, the number of twisted pairs 214-217 can be different from just one twisted pair to more than four twisted pairs.

The cable 210, depicted in figure 4, can be produced by the sequence of operations, when initially singly form a separate twisted pairs 214-217 with outstretched and twisted them together with aramid thread, resulting in each twisted pair 214-217 form so that it essentially was on the inside of the shell and the filler 238 gaps within a pair. As indicated above in the description of the embodiments of Figure 2 and Figure 3, the filler 238 gaps within a pair can be made of compressible material, so that when the twisting insulated conductors 222 and 224 filler 238 gaps within a pair of squeeze and give him such a form that it essentially fills the voids between the conductors 222 and 224.

Then twisted pairs 214-217 and covering their filler 238 gaps within a pair of stretch together with filler 218 core and twisted in such a way as to form a structure in the form of a large spiral containing a filler 218 of the core, twisted-pair 214-217 and fillers 238 gaps within a pair. When the twisting of the twisted pairs 214-217 in a spiral exert compression filler 218 of the core and at the same time give him such a form that conforms to the shape of the voids between the filler 238 gaps within a pair, and he essentially fills these voids. Then on top of twisted pairs 214-217 way of extrusion pressure may be applied to plastic, such as PVC, forming a peripheral fillers 240, essentially filling the void between the outer peripheral sites fillers 238 gaps within a pair and the inner surface 220 of the shell 212. And, finally, the internal structure of the cable is placed in the shell 212.

Despite the fact that prevedeno the above description, were demonstrated specific component parts, options for implementation and applications of the present invention, it is understood that the invention is certainly not limited to, as specialists in this field of technology can be the variation, in particular, using the above objectives of the invention. Therefore, I believe that the attached claims cover such modifications as they contain distinctive features that do not fall within the essence and scope of patent claims of the present invention.

1. Cable with chetverochka twisted-containing shell; at least one four insulated conductors, which carry out signal transmission enclosed in the shell, providing a tight connection, and the specified shell and these insulated conductors, which carry out signal transmission, in contact with each other and arranged in the form of a spiral so that the limit of a hollow core; and an outstretched vapour barrier material that provides a tight connection of these insulated conductors, which carry out signal transmission, and the specified vapour barrier material essentially fills the specified hollow core throughout the length of the specified isolated provodnikov is, on which the transfer signal, and the above membrane and vapour barrier material to form a hermetic seal around the insulated conductors, which carry out signal transmission, preventing the flow of vapor along these insulated conductors, which carry out signal transmission.

2. Cable with chetverochka winding according to claim 1, in which the specified shell contains a gas-tight outer shell.

3. Cable with chetverochka winding according to claim 1, in which the specified shell contains inner and outer shell, and the dielectric constant of the specified inner shell exceeds the dielectric constant of the insulation material on these insulated conductors, which carry out signal transmission.

4. Cable with chetverochka winding according to claim 1, in which the specified shell forms a layer obtained by the method of extrusion under pressure, essentially filling a void between insulated conductors, which carry out signal transmission, and the specified layer provides a tight connection of these insulated conductors, which carry out the transmission of a signal between them along their entire length.

5. Cable with chetverochka winding according to claim 1, in which the specified shell forms a what you shell of polyvinyl chloride (PVC), obtained by the process of extrusion under pressure, which essentially fills the void between insulated conductors, which carry out signal transmission.

6. Cable with chetverochka winding according to claim 1, in which the specified shell contains an outer layer of nylon, which is essentially impermeable to gases.

7. Cable with chetverochka winding according to claim 1, in which the specified vapour barrier material to form a stretched core, that you are carrying out the compression of the specified core through these insulated conductors, which carry out signal transmission up until it essentially will not fill the emptiness specified in the hollow core, located between the said insulated conductors, which carry out signal transmission.

8. Cable with chetverochka winding according to claim 1, in which the core of the cotton forms a specified vapor-proof material, while carry out the compression of the specified core through these insulated conductors, which carry out signal transmission up until it essentially will not fill the emptiness specified in the hollow core, located between the said insulated conductors, which carry out signal transmission.

9. Cable with chetverochka winding according to claim 1, in which the om core of aramid yarn forms a specified vapor-proof material, thus exert compression specified core through these insulated conductors, which carry out signal transmission up until it essentially will not fill the emptiness specified in the hollow core, located between the said insulated conductors, which carry out signal transmission.

10. Cable with chetverochka winding according to claim 1, in which the said shell, a vapor-proof material and insulated conductors, which carry out signal transmission, interact in such a way that allows high-speed transmission of signals in an Ethernet network in accordance with the IEEE 802.3 Institute of engineers on electrical and electronics USA (IEEE).

11. Cable with chetverochka winding according to claim 1, in which the said shell, a vapor-proof material and insulated conductors, which carry out signal transmission, interact in such a way that allows high-speed transmission of signals in an Ethernet network in accordance with standard 10Base-T.

12. Cable with chetverochka winding according to claim 1, in which the said shell, a vapor-proof material and insulated conductors, which carry out signal transmission, interact in such a way that allows high-speed transmission of signals in the network adapters in accordance with the standard 100Base-T.

13. A method of manufacturing a cable with chetverochka winding, comprising the following operations: perform layout of four insulated conductors, which carry out the transmission of a signal in the form of a spiral and so that they touch each other, and insulated conductors, which carry out signal transmission limit of a hollow core that is between them, enters the vapor filler between the insulated conductors, which carry out the signal transmission, so that it essentially fills the hollow core throughout the length of the specified insulated conductors, which carry out signal transmission, and enclosed in a sealed envelope insulated conductors, which carry out signal transmission, and through these transactions the introduction and conclusion in the shell to form a vapor tight seal with insulated conductors, which carry out signal transmission, preventing the flow of vapor along these insulated conductors, which carry out signal transmission.

14. The method according to item 13, which additionally contains the following: form a gas-tight outer shell around the insulated conductors, which transfer the signal is.

15. The method according to item 13, in which the specified operation is wrapping additionally contains the following: on top of the insulated conductors, which carry out the transmission of a signal by way of extrusion under pressure is applied composition, forming an inner shell, and the dielectric constant of the specified inner shell exceeds the dielectric constant of the insulation material on these insulated conductors, which carry out signal transmission.

16. The method according to item 13, which additionally contains the following: around the insulated conductors, which carry out the transmission of a signal by way of extrusion under pressure form the inner layer so that it essentially fills the voids between the insulated conductors, which carry out signal transmission.

17. The method according to item 13, which additionally contains the following: around the insulated conductors, which carry out the transmission of a signal by way of extrusion under pressure is applied composition of polyvinyl chloride (PVC), forming an inner shell, so that it essentially fills the voids between the insulated conductors, which carry out signal transmission.

18. The method according to item 13, additionally containing SEB is the following operation: add outer shell made of nylon, which is essentially impermeable to gases.

19. The method according to item 13, in which when performing the specified operation introduction exert compression insulated conductors, which carry out signal transmission up until the vapour barrier filler essentially fills a void between the insulated conductors, which carry out signal transmission.

20. The method according to item 13, in which the specified operation is the introduction contains a broaching operation and contraction of the core of aramid yarn between the insulated conductors, which carry out signal transmission so that it essentially fills the voids between the insulated conductors, which carry out signal transmission.

21. Vapor-proof cable for high speed data, which contains at least two conductors, which carry out signal transmission, twisted in the form of a spiral structure; stretch vapour barrier filler core held out between these two conductors, which carry the signal, and perform the compression and deformation of the specified filler core so that it is hermetically filled at least an inner void between at least two conductors, the which transfer signal, and vapor tight peripheral material caused by the method of extrusion under pressure so that it fills the peripheral cavities located around the specified at least two conductors which transfer signal, and the specified extend the filler core and extruded peripheral filler form a hermetic shell for these conductors, which carry out the transmission of a signal along their entire length, whereby to prevent the flow of vapor along the cable.

22. The cable according to item 21, further containing multiple twisted pairs of conductors, which carry out signal transmission, bounding a hollow core, located between the twisted pairs, and the gaps within pairs inside each twisted pair, and the specified extend the filler core contains the first strand of aramid filaments, which essentially fills the specified hollow core, and the second strand of aramid filaments, which essentially fills these gaps inside pairs.

23. The cable according to item 21, further comprised of the first and second extending fillers core, forming a tight casing for the said at least two conductors which transfer signal, and shows the extruded peripheral material is sealed envelope to the above first and second extending fillers core.

24. The cable according to item 21, further containing four twisted pairs of conductors, which carry out signal transmission, made in the form of a spiral, bounding a hollow core, the gap within couples and the gaps between the pairs, and these extend the filler core and peripheral material fills essentially all air gaps specified in the hollow core, the gap within couples and the gaps between the pairs.

25. The cable according to item 21, further containing four conductors, which carry out signal transmission.

26. The cable according to item 21, further containing an inner shell made of a specified peripheral material subjected to extrusion under pressure, and the outer shell, which is essentially gas-tight.



 

Same patents:
Polymer composition // 2247758

FIELD: polymer materials.

SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.

EFFECT: enhanced waterproofing properties.

15 cl, 2 tbl, 11 ex

Waterproof cable // 2212722

The invention relates to a cable technique and can be used for transmitting signals from sensors used to measure various parameters and functioning in adverse conditions

The invention relates to electrical engineering, namely, to designs of stranded conductors for overhead lines used for transmission of electric energy in the air networks and lines electrified transport as cable pin pendants

The invention relates to electrical engineering, and in particular to structures of bare stranded conductors for overhead lines used for transmission of electric energy in the air networks and lines electrified transport as a reinforcing feeding and suction lines

The invention relates to the production of protective covers for cables, obtained by drawing on the canvas (fabric, nonwoven fabric, paper) bituminous compositions

The invention relates to high-voltage wire, designed for high voltage, intended for overhead power lines with voltages of approximately 60 kV and above

FIELD: electrical engineering; cable filler compositions.

SUBSTANCE: proposed PVC base composition designed for filling conductor-to-conductor space of electric cables by extrusion has following ingredients, parts by weight: divinyl-styrene thermal elastomer, 100; high-pressure polyethylene, 40 - 60; mineral oil, 80 - 95; chalk or kaolin, or aluminum hydroxide, 100 - 50.

EFFECT: enhanced fluidity index and frost resistance; ability of retaining cable flexibility at sub-zero temperatures.

1 cl

FIELD: electrical engineering.

SUBSTANCE: invention relates to manufacture of electroconductive materials by way of applying electroconductive coating, impregnated-paper insulation, and electroconductive threads of power cables onto paper base. In particular, material consists of natural paper base and electroconductive layer, whose thickness constitutes 0.03-0.14 that of insulation layer placed on paper and composed of aqueous suspension of carbon black (6-10%) and polyvinyl alcohol (1.0-4.0%) together with additives of acrylic acid ester/methacrylic acid ester copolymer (7-12%) and oxyethylated (with at least 7 ethylene oxide groups) alkylphenol or sodium polyacrylate (0.1-0.5%).

EFFECT: improved workability, electrical conductivity, strength, elasticity, heat resistance, moisture resistance, and resistance to splitting within cable.

3 tbl

The invention relates to the field of electrical engineering, in particular to compositions based on ethylene-propylene rubber, used as maguilera placeholder in electric cables and wires

The invention relates to a cable technology, in particular to the technology of manufacturing of power cables with paper insulation used for power transmission

The invention relates to the field of electrical engineering and relates to the execution device for SZ-stranding conductive lived pie

The invention relates to the field of hardware industry and can be used in the production of steel cords and multi-layered rope and cables

FIELD: multiple twin cables for communications in local network.

SUBSTANCE: proposed multiple twin cable designed to prevent vapor transfer when immersed in petroleum oil has internal and external sheaths that cover insulated signal-transferring conductors and are made in the form of helical structure. Core filler fills up core and spaces between signal transferring conductors. Core filler and internal sheath are made of vapor-tight material and fixed to insulated conductors so that they fill up all grooves and slots around signal transferring conductors. External gas-tight sheath can be provided to make it possible to immerse cable in petroleum oil for long time intervals without impairing its functional capabilities.

EFFECT: ability of preventing vapor transfer lengthwise of cable.

26 cl, 4 dwg

FIELD: electrical engineering; balanced high-frequency cables for data transfer.

SUBSTANCE: proposed cable has core formed by polyethylene or porous polyethylene insulated conductors twisted together to form pair and filler disposed between insulated conductors and cable shield covered with sheath on top. Used as filler are untwisted fibrillated polypropylene threads longitudinally disposed throughout entire cable length. In wiring this cable needs bending through very small radius (below ten-fold of cable outer diameter.

EFFECT: reduced capacitance and attenuation factor, enhanced stability of cable throughout entire operating frequency range.

1 cl, 4 dwg

FIELD: data transmission under very humid conditions, those including on board ships.

SUBSTANCE: proposed cable has sequentially arranged core incorporating at least two pairs of polyethylene covered stranded conductors, filler in the form of low-molecular rubber based sealing composition, shield, and sheath with mentioned filler in-between. This composition is, essentially, compound incorporating 100 parts by mass of rubber SKTN and 3-5 parts by mass of catalyst; the latter has 7 mass percent of γ-aminopropyl triethoxysilane and 93 mass percent of ethyl silicate; these pairs are placed longitudinally throughout entire cable length inside filler All air gaps are filled up (no water penetrates along cable).

EFFECT: reduced outer diameter at low attenuation constant and high near-end cross-talk attenuation throughout entire operating frequency band.

1 cl, 2 dwg, 1 tbl

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