Sealing product and method for sealing liquid-containing cables

FIELD: electricity.

SUBSTANCE: sealing device is intended for design of cables intended for underground usage. The pressure-limiting device for cables may contain, for example, the first cable including a conductor and an oil-containing layer encapsulating the conductor and the second cable having a conductor. At the connection spot the first cable conductor may be connected to that of the second cable. The connection spot and the conductors of the first and the second cables may be covered with a pressure-limiting hose. Installed at multiple spots o the pressure-limiting hose may be multiple ties for crimping the pressure-limiting hose round the connection spots and the first and he second cables sections. The pressure-limiting device may be implemented in the form of a hose on a single-strand cable or in the form of a breakout with individual hoses on a multi-strand cable such as a three-strand cable.

EFFECT: oil-containing cables sealing improvement.

20 cl, 12 dwg

 

The level of technology

Some types of electrical cables, especially in the early design of cables intended for use under ground, have a lead sheath surrounding one or more electrical conductors, and the insulating layer, oil-impregnated paper, which is placed between the lead sheath and the electrical conductors. Cables of this design is usually referred to as cables with impregnated paper insulation and lead sheath (in English literature - "PILC", from paper-insulated lead-covered cables). Despite the fact that modern cables are extruded dielectric (plastic) shell without contained inside the liquid, a large number of cables with impregnated paper insulation and lead sheath is still in use. During repair, okontsevanie or connection cables with impregnated paper insulation and lead sheath is necessary to provide sealing of the repair area (often called maslotorgovli barrier) to hold the liquid in the cable to prevent unwanted effects that may be caused by leakage of oil or other used in cables dielectric liquid. The fluid in the cable often is under pressure due to thermal expansion caused by the energy dissipation of the power cable, and its pressure is requently ranges, as the internal temperature of the cable may vary due to, for example, changes in electrical loads.

The invention

Embodiments of the invention may include limiting the pressure device for cables. The first cable may include a conductor and oil-containing layer surrounding the conductor. A second cable may include a conductor. The conductor of the first cable can be connected to the conductor of the second cable. To limit the pressure sleeve may cover the connection splicing and the conductors of the first and second cables. In some places, to limit the pressure sleeve can be installed fixing elements for crimping to limit the pressure sleeve around the joint splicing and parcel of the first and second cables.

The invention may also include, for example, other embodiments of the bounding pressure devices for cables. The cable may include a single main cable that branches into a first set of cables, each of which has a conductor and oil-containing layer surrounding the conductor. Each cable of the second set of cables may include a conductor. There can be several connections, splicing, and in each of the compounds splicing the conductor of one of the first cables can connect with one conductor of the second cable. Electrically insulating elastomeric case may cover part of the basic cable and part of the first cable. The elastomeric cover may have a main part in the form of a glove with a single hole at the first end of the base part in the form of gloves and a set of apertures at the second end of the base part in the form of gloves, with a single inlet may pass through the main cable, and through each the many processes can be respectively one of the first cables. Main cable and an elastomeric sheath may cover to limit the pressure shell. To limit the pressure shell may have a single opening at one end of the base portion to limit the pressure shell and the many holes on the other end of the main part to limit the pressure shell, a single hole may pass through the main cable, and through each the many processes can be respectively one of the first cables. Can also be used many limiting the pressure of sleeves, each limiting the pressure sleeve may cover one connection splicing, one conductor of the first cable and the conductor of one of the second cables. In some places limit the pressure shell and each of the limiting pressure hoses can be installed several locking elements for crimping to limit the pressure shell around the elastomeric cover and crimping each of limiting the pressure sleeve around the joint splicing and sections of the conductors of the first and second cables.

Brief description of drawings

Figure 1. Top view of the end of the electrical cables with impregnated paper insulation and lead sheath with remote sections of the different layers and exposed center conductor.

Figure 2. Top view of a cable similar to the cable in figure 1, in which at the end of the lead sheath and the intermediate semiconductor layer superimposed material for removing dielectric voltage, and the end of the paper insulation taped to prevent it from unwinding.

Figure 3. Top view of the cable, similar to those shown in figures 1 and 2, on which there is mounted an elastomeric tube, which further forms maslotorgovli barrier.

Figure 4. Top view of the cable shown in figure 3, after the elastic planting tube on the cable.

Figure 5. Top view of the end of the cables with impregnated paper insulation and lead sheath with three conductive conductors with partially remote areas of different layers and exposed conductors.

6. Top view of the end of the cables with impregnated paper insulation and lead sheath, similar to the cable in figure 4, with the elastic planted on each of the conductors elastomere tubes.

7. Axonometric view of the branched products cold shrink in the expanded state, on many hearts.

Fig. A partial cross-section of cables with impregnated paper isol is on and the lead sheath, depicted in Fig.6, with built-in extensive product cold shrink depicted in Fig.7.

Fig.9. The cross section single wire connected to the other cable.

Figure 10. The cross section single wire shown in Fig.9, with the installed sleeve, to limit the pressure, and the locking elements on the sleeve, to limit the pressure.

11. Section three-core cable with conductors connected to conductors of another cable.

Fig. Section three-core cable, shown at 11, with installed to limit the pressure shell and limit the pressure sleeve, and clamping elements, clamping as limiting the pressure shell and limit the pressure sleeve.

Detailed description of the invention

Figure 1 shows an example of the electric cable inside the dielectric fluid. The cable 10 is an example of a cable with one conductive conductors, impregnated paper insulation and lead sheath, and it consists of the outer lead sheath 12, the intermediate semiconductor layer 14 formed from a saturated carbon or metalized paper, oil-based insulating layer 16 (with respect to the cable 10, is formed of oil-impregnated paper), and the center conductor or group of conductors 18. Under isolate the named layer 16 is another semi-conducting layer. Some types of cable 10 also have the outer plastic cover surrounding and protecting a lead sheath 12. For purposes of this description in the present description discusses the formation of sealing, or maslotorgovlya, the barrier at the end of the cables with impregnated paper insulation and lead sheath, prone to swelling, to prevent oil leakage from a cable that allows you to attach to the cable various accessories. However, it should be understood that the solution presented in this invention are equally applicable to cables of other types, not just cables with impregnated paper insulation and lead sheath, which is the main object of the present description. So, for example, presents here a technical solution can be applied to cables of the type C with paper impregnated nestekaasu composition of insulation (in the English language - such as "MIND", from mass-impregnated non-draining) with an insulating layer, impregnated with grease. Similarly, here presented technical solutions can be applied to other liquids, except oils, for example, to materials of higher viscosity such as grease. Therefore, in this description, the term "cables with impregnated paper insulation and lead sheath" you should understand all the types of cables inside the LM is the cue or viscous material, and the terms "oil" and "maslotorgovli barrier" refers to all types of liquid and viscous materials used in the construction of the cables.

Figure 1 shows a cable 10, is ready for installation maslotorgovlya barrier, which first removes the area (approximately 28 cm) lead sheath 12, resulting in exposed semi-conducting layer 14. Similarly deleted several smaller (length of about 22 cm) plot semi-conducting layer 14, resulting in exposing oily insulating layer 16. And finally, removed even less (for example, a length of approximately 11 cm) plot oily insulating layer 16, resulting in the exposed center conductor 18. Semi-conducting layer under the insulating layer 16 is removed almost the same length as the insulating layer 16. On the center conductor 18 is installed cable lug 19. The tip 19 may be the tip of any type, including tips for joining or sealing of cable type 10, but not limited to.

As shown in figure 2, in one of the embodiments of the invention oily insulating layer 16 is charged insulating adhesive tape 20, which prevents oily insulating layer 16 from unrolling. Suitable for this purpose, the tape is offered by the company ZM, the author of this application, under the trademark "33 + Vinyl Electrical Tape". Another strip of tape 22 may be affixed to the lead shell 12 near the site of the incision (e.g., at a distance of 1-2 cm), to indicate the cutting position of the lead sheath, as will be explained below. As the tape 22 can be used the same type of tape as the tape type 20.

The next stage of preparation of the cable 10 to the formation of maslotorgovlya barrier is removing the dielectric voltage. In one of the embodiments of the invention it is accomplished by winding the tape 24 with a high dielectric constant (or tape to relieve tension) around the end of the lead sheath 12 and semiconductor layer 14. Tape 24 for removing the dielectric voltage is fully covered by semi-conducting layer 14 and a bit overlaps (for example, 1 cm) oil-containing insulating layer 16. Suitable for this purpose, the tape is offered by the company 3M under the trademark "2220 Stress Control Tape.

As shown in Figure 3, the first element maslotorgovlya barrier is an elastomeric tube 26. Elastomeric tube 26 is electrically insulating and almost mesonephroma, as will be described in greater detail below, and is formed from a composition containing fluoroelastomer and epichlorohydrin. In this document, the term "almost maslozapolnyaemyh" is understood as restricted permeability and absolute impenetrable is here in relation to this type of liquid, contained in the cable. Limited permeability is determined by the maximum allowable increase in weight in accordance with Military Regulations dated September 27, 1984, No. X1511 IB. Elastomeric tube 26 is made, usually by way of extrusion or molding, and in its free state has an almost cylindrical shape. In this description, the terms "tube", "tubular", "cylinder"and "cylindrical" and the like are not restricted to objects having a circular cross-section, but rather represent a hollow and elongated objects of any cross-section. Elastomeric tube 26 may be a single layer element, and to provide an element formed by multilayer with other elastomers sufficient mechanical strength, or to reduce the cost of the system.

The dimensions of the elastomeric tube 26 can vary significantly depending on the size of the cable 10. In one of the embodiments of the invention the length of the elastomeric tube 26 is greater than or equal to the distance from the lead sheath 12 to the tip 19. The diameter of the elastomeric tube 26 (in free state) is less than the diameter of the insulating layer 16, typically one millimeter or more. Due to the elasticity of the elastomeric tube 26 tube of the same diameter can be used with cables 10 with dia the ETP in the whole range. In the expanded condition, shown in Figure 3, the diameter of the elastomer is greater than the diameter of the cable 10. The thickness of the elastomeric tube 26 in the free state may be different, depending on the intended application.

Before installing the cable 10 elastomeric tube 26 is removed, the core 28, as is known versed in the art and as described, for example, in U.S. patent No. 3515798 (author Sievert). Remove the core 28 holds the elastomeric tube 26 in a radially expanded condition, and this core also has an almost cylindrical shape and is slightly longer elastomeric tube 26. The diameter of the removed core 28 may be varied within wide limits, the only practical requirement to it is that it must be greater than the external diameter of the cable 10, and the gap between the cable and the core should be sufficient for its subsequent removal. Wall removed core 28 has a thickness of, usually, from one millimeter to five millimeters. Remove the core 28 is made of durable and flexible material, such as acetate-butyrate cellulose, polyethylene, polypropylene or polyvinyl chloride. In one of the embodiments of the invention remove the core 28 is rolled into a spiral strip, coils which are densely stacked to each other, but can attests is from each other, that allows you to retrieve deleted the core 28 of the elastomeric tube 26 by pulling on the end 30 and Raskatov spiral.

As shown in Figure 3, one end of the elastomeric tube 26 is held near the label formed by the marking tape 22. As extended end 30 of the removed core 28, the elastomeric tube is gradually reducing in place around the cable 10, and in the end it tight and elastic sits on the cable 10, as shown in Figure 4. In the embodiment shown in Figure 4, the elastomeric tube 26 overlaps the lead sheath 12 approximately 2 cm and approximately the same length overlaps the tip 19. Thus the elastomeric tube 26 forms maslozhirovymi barrier that prevents leakage of fluid from the cable 10, as well as the penetration of water into the cable 10.

It should be noted that the elastomeric tube 26 is in direct contact with oil-based insulating layer 16 and exerts a resilient pressure on the oil-containing layer 16. In this description, the term "elastic pressure" refers to the ability of the installed elastomeric element to expand and contract in accordance with changes in the size underneath the basics, as well as changes in fluid pressure in the cable, caused, for example, thermal expansion and contraction. Therefore, an additional advantage of the properties of the elastomeric tube 26 CEC is icno and to elastically expand and contract, what elastomeric tube 26 provides for removing the fluid pressure in the cable 10 and limits the pressure inside the cable 10.

As mentioned above, the cables with impregnated paper insulation and lead sheath can have more than one conductive core 18.

Figure 5 presents the cable 100 with impregnated paper insulation and lead sheath having a set of conductive lived 18. It shows the cable 100 having three conductor 18a, 18b and 18C (collectively, the conductors 18), although in the cable and possibly a different number of conductive lived. Like the device cable 10 described above and shown in figures 1 to 4, around each of the conductors 18a, 18b and 18C of the cable 100 has its oily insulating layer 16A, 16b and 16C, respectively (collectively the insulating layers 16)formed in the cable 100 from the oil-impregnated paper, and these insulating layers are surrounded by the intermediate semiconductor layers 14a, 14b and 14C, respectively (collectively, the intermediate semiconductor layers 16)formed from a saturated carbon or metalized paper. A set of conductors 18 (that is, each of the conductors 18 together with its insulating layer 16 and the semiconductor layer 14) is enclosed in a single outer lead sheath 12, resulting in the cable 100. Some types of cable 100 also have the outer plastic shell, select the appropriate lead and protect the shell 12.

As shown in Figure 5, preparation of cable 100 to install maslosoderzhaschih barrier starts with cutting area of the lead sheath 12, which opens many conductors 18 with its semi-conducting layers 14 and oily layers 16, which allows to separate them from each other. Each of the multiple conductors 18 of the cable 100 is prepared in a manner analogous to what was described for conductor 18 of the cable 10 (Fig 1). You have removed the section semi-conducting layer 14, resulting in exposed underneath oily insulating layer 16 is then removed several smaller area of the insulation layer 16, resulting in exposing the underlying conductive lived 18. Then on the conductors 18 are installed cable lugs 19a, 19b and 19 (C) (collectively cable lugs 19). As mentioned above, the tip 19 may be the tip of any type, including tips for joining or sealing of cable type 10, but not limited to.

As shown in Fig.6, each of the prepared wires (marked on Figure 5 as 18a, 18b and 18C) are elastomeric tube 26a, 26b and 26C, respectively, in a manner analogous to that described above in relation to Figures 1 to 4, although in this case, the step of removing the dielectric voltage, for example, by winding the ribbon with a high q is the electric constant around the end of the lead sheath 12 and semiconductor layer 14, can be omitted. As described above in relation to Figures 1 to 4, the elastomeric tube 26 are electrically insulating and almost maslozapolnyaemyh, as will be described in greater detail below, and is formed from a composition containing fluoroelastomer or epichlorohydrin. In one of the embodiments of the invention the length of each elastomeric tube 26 is greater than or equal to the distance from the end of the lead sheath 12 to the tip 19. In the embodiment depicted in Fig.6, each elastomeric tube 26 overlaps the tip 19 of about 2 cm, but does not reach fully to the lead sheath 12 due to the divergence of conductors 18 from each other. In one of the embodiments of the invention the elastomeric tube 26 are, as far as possible, closer to the lead sheath 12.

As shown in Fig.6, at the end of the installation elastomeric tube 26 tightly and elastically sit on the respective conductors 18, oily insulating layers 16 and semiconductor layers 14. Each elastomeric tube 26 is in direct contact with the oil-containing layer 16 and exerts a resilient pressure on the oil-containing insulating layer 16.

7 and 8 shows the second element maslotorgovlya barrier cable 100. In particular, it is shown elastomeric sheath 120. The elastomeric sheath 120 is branched element cold shrink, with many of elastome the different sections (elements) a, 122b, s and 122d, communicating with each other. In Fig. 7 shows an elastomeric elements a, 122b, s and 122d in the expanded condition for restraining the hearts 124A beaches, 124b, s and 124d, respectively. In one of the embodiments of the invention the elastomeric cover 120 is electrically insulating. In one of the embodiments of the invention the elastomeric cover 120 is almost maslozapolnyaemyh. In one of the embodiments of the invention the elastomeric cover 120 is formed from a composition containing fluoroelastomer and epichlorohydrin. In one of the embodiments of the invention the elastomeric cover 120 and the elastomeric tube 26 formed from virtually the same composition. In one of the embodiments of the invention the elastomeric cover 120 is a semiconductor, which contributes to the removal of the dielectric voltage. Elastomeric cover 120 is made, usually by way of molding. As the elastomeric tube 26, the elastomeric cover 120 may be a single layer element, and to provide an element formed by multilayer with other elastomers sufficient mechanical strength, or to reduce the cost of the system.

As shown in Fig.7, the elastomeric cover 120 is formed in the form of gloves with a large entrance (section 122d having a corresponding diameter to receive the intact (pristine) section of the cable 100, and set about the sprouts (sections a, 122b and s) on the opposite side to the output are separated from each other by wires 18 of the elastomeric cap 120. The number of processes corresponds to the number of conductive lived 18 in the cable 100.

Elastomeric cover 120 (namely, its elements a, 122b, s and 122d) can be installed on the cable 100 and the conductors 18 in accordance with the methods described above in relation to the installation of the elastomeric tube 26. In particular, when retrieving deleted hearts 124A beaches, 124b, s and 124d, appropriate sites a, 122b, s and 122d elastomeric cover 120 shrink, and in the end tightly and elastically sit on their places on the cable 100, as shown in Fig. 8. As the dimensions of the elastomeric tube 26, the dimensions of the elastomeric gloves 120 can vary greatly depending on the size of the cable 100 and the conductors 18 in it. Lots a, 122b, s and 122d are selected according to the diameter, ensuring a good fit on the respective outer surfaces of the cable 100 and the elastomeric tubes 26a, 26b and 26C that are already in a compressed state. In one of the embodiments of the invention, as shown in Fig length sections a, 122b, s and 122d in the reduced state are sufficient for overlapping section 122d of the lead sheath 12 of the cable 100 in a length of approximately 2 cm, and areas a, 122b and s underneath the elastomeric tubes 26a, 26b and 26C length of about 5 to 8 see the possible, of course, the overlapping areas elastomeric cover 120 with the relevant sections of the cable and to another length, in accordance with the requirements of a particular application. As soon as the installation of elastomeric cover 120 in place finished, maslotorgovli barrier is formed. This system provides a reliable sealing of the end of the cable and prevents the expiration of any type of liquid from the cable to the outside, as well as the ingress of water inside the cable 100 in normal operating conditions.

In some applications, to prevent the formation of voids in the elastomeric cover 120 (for example, in the zones 130 between areas a, 122b and s elastomeric cover 120 may be provided in the nipple 140 (Fig) to release air during or after installation of the elastomeric cover 120 in place.

It should be noted that the elastomeric cover 120 has an elastic pressure on underneath the elastomeric tube 26, and underneath oily insulating layers 16. That is, the elastomeric tube 26, and an elastomeric cover 120 expand and shrink in accordance with changes in the size underneath the cable 100, as well as changes in fluid pressure in the cable, caused, for example, thermal expansion and contraction. Therefore, an additional advantage of the properties of the elastomeric tube 26 and the elastomeric cover 120 cycles and e is actiono to expand and contract is removing the fluid pressure in the cable 100 and the limit pressure inside the cable 100.

Masloudalyayushchie device presented in the present description, in fact, make the cables with impregnated paper insulation and lead sheath (solid or stranded) cable with plastic insulation. With such devices for cables with impregnated paper insulation and lead sheath can be used in various facilities, the application of which is usually limited cables with insulation made of extruded dielectric. For example, the conductor can be installed tip with the eye, or it can be used combined coupling for connecting conductive lived 18 with the conductive wires of another cable (not shown). Another cable may be in this case a cable insulated with extruded dielectric, or a cable type with impregnated paper insulation and lead sheath, which has maslotorgovli barrier in accordance with the present invention.

As mentioned above, embodiments of the present invention include products cold shrink formed from elastomeric compositions comprising at least fluoroelastomer and epichlorohydrin. Examples of suitable elastomeric compositions comprising at least fluoroelastomer and epichlorohydrin, are described in detail in co-owned patent application U.S. many authors as "Product x is a cold shrinkage and methods of manufacturing cold shrink" No. 11/191 838, filed July 28, 2005, which in this description is mentioned solely for the purpose of reference.

The term "epichlorohydrin" in the present description refers to any substances containing epichlorohydrin, including any polymers containing epichlorhydrine monomers, such as, for example, photopolymers, copolymers, terpolymers and terpolymer containing epichlorohydrin. The term "cold shrink" in this description is defined as the ability of a product (or parts of products) to contract from the expanded state to free, or partially extended, at room temperature (e.g. about PI 20-25C), without application of heat.

In elastomeric compositions for the manufacture of cold shrink products include elastomers, which allows the resulting products cold shrink to extend from the free state to the extended, and shrink back from the extended state to free. In accordance with the present invention in an elastomeric composition includes a mixture of a fluoroelastomer and epichlorohydrin. Some embodiments of cold shrink products in accordance with the present invention may be subjected in the expanded state to temperatures of at least 150C for quite a long time and do not show (when viewed with the naked eye) signs of rupture, fault and and bundles.

Unless otherwise noted, all concentrations herein are expressed in parts by weight of each component divided by one hundred weight parts of rubber (phr), where the term rubber is meant the total weight of fluoroelastomer and epichlorohydrin. Thus, the concentration of each component in this description, expressed in phr, is the ratio of the weight component parts to one hundred parts by weight of fluoroelastomer and epichlorohydrin.

In accordance with the present invention, the epichlorohydrin and the fluoroelastomer can log in elastomeric compositions in a wide range of concentrations. For example, in some embodiments of the present invention, the concentration of the fluoroelastomer in the elastomeric composition can be from about 10 parts of fluoroelastomer and more to about 60 parts of fluoroelastomer and less to 100 parts total weight of epichlorohydrin and fluoroelastomer. The concentration of epichlorohydrin in the elastomeric composition can be from about 40 parts of epichlorohydrin to about 90 parts of epichlorohydrin per 100 parts total weight of epichlorohydrin and fluoroelastomer. In the context of the present description, if you are using polymers containing epichlorohydrin (for example, homopolymers, copolymers, terpolymers and terpolymer containing epichlorohydrin), the weight parts of epichlorohydrin mean of the sums of the NSS weight polymers, containing epichlorohydrin.

In accordance with the present invention in the elastomeric composition may further include a reinforcing filler to strengthen the resilience of those of his products cold shrink to tearing and delamination under high temperatures. Examples of suitable filler materials include reinforcing fillers silica, coal powder reinforcing class, fluoropolymers, clay, and combinations thereof in any proportions. Examples of suitable fillers are described in detail in the aforementioned patent application U.S. No. 11/191 838. In the present description, the term "reinforcing fillers silica" all compounds having the formula SiO2(for example, pure silica); all compositions comprising at least about 10% by weight of SiO2and/or derivatives of SiO2in relation to the total weight of the composition; all silicates; and any combination thereof in any proportion. The term "coal powder reinforcing class" in the present description denotes the coal powder of any type with an average particle size of less than about 40 nm, which corresponds to the average surface area of about 65 m2/year

The product cold shrink can be made from an elastomeric composition using any suitable process, such as, for example, of the extras is Zia or molding. In some embodiments the elastomeric composition used for manufacturing products cold shrink, baked, autoclaved or irradiated to achieve the required physical properties of the composition, examples of suitable methods of roasting, autoclaving and irradiation are described in detail in the aforementioned patent application U.S. No. 11/191 838.

In accordance with the present invention, the elastomeric compositions may be formed products cold shrink any geometric shapes and configurations, as is known versed in the art. Not exhaustive examples of cold shrink products include tubes, plates and product branching patterns (for example, in the form of a case with multiple inputs and/or outputs).

Products cold shrink in accordance with the present invention (formed from elastomeric compositions in accordance with the present invention) may have additional benefits in the form of various combinations of mechanical properties under different environmental conditions (for example, at room temperature or at a temperature of 150C). In some embodiments of the product cold shrink in accordance with the present invention, such as tubes or plates, can prevent the elongation to break of at least about 450% at room temperature and/or lengthening of p is sriva at least about 250% at a temperature of 150C when tested in accordance with the procedure described in the Procedure section describe the Properties and Characteristics" of this document. In some embodiments of the product cold shrink in accordance with the present invention, such as tubes or plates, can give irreversible shrinkage of less than about 35% when heated up to 100C when tested in accordance with the procedure described in the Procedure section describe the Properties and Characteristics" of this document. Moreover, some embodiments of tubes and plates, formed from compositions in accordance with the present invention may produce irreversible shrinkage of less than about 25% when heated to 100C. Some embodiments of tubes and plates, formed from compositions in accordance with the present invention may produce irreversible shrinkage of less than about 20% when heated to 100C.

Various embodiments of the cold shrink products in accordance with the present invention is resistant to rupture or delamination at high temperatures. For example, some embodiments of cold shrink products in accordance with the present invention is resistant to rupture, while in the expanded condition over an extended period of time (for example, for seven days in a state of radial expansion to 200%) with increasing temperature up to about 150C.

Various embodiments of the products cold is Oh shrinkage in accordance with the present invention have the chemical resistance of such substances, as, for example, diesel fuel and hydraulic fluid.

Some embodiments of cold shrink products in accordance with the present invention give more weight to less than about 25% when immersed in diesel fuel at a temperature of 49C for 24 hours, and/or less than about 10% when immersed in the hydraulic fluid at a temperature of 71C for 24 hours.

Embodiments of the invention may include, for example, to limit the pressure device. As shown in Fig.9-10, the first cable 12 may include a conductor and oil-containing layer surrounding the conductor. A second cable 55 may include a conductor. Connection splicing 50 can be connected to the conductor of the first cable 12 and the second conductor of the cable 55. To limit the pressure sleeve 60 may cover the joint splicing 50 and the conductors of the first cable 12 and the second cable 55. To limit the pressure sleeve 60 may cover several twisted veins, which in particular can include multiple woven wires.

For crimping to limit the pressure sleeve 60 around the joint splicing 50 and parcel of the first cable 12 and the second cable 55 may be imposed several locking elements in several places to limit the pressure sleeve 60. For example, the locking elements 66 and 68 may be imposed to limit the pressure rukav in places radially oriented relative to the ends of the connection splicing 50. To limit the pressure sleeve 60 can also be set with the locking elements in places remote from the connection of the splice 50, on both sides of the connection splicing 50. As the locking element can be any structure suitable for fixing, including, for example, clamps, wire twisting, belt materials, cold shrinkable tube and other fastening elements.

Embodiments of the invention may include electrically insulating, almost maslozapolnyaemyh elastomeric tube 26 that covers the part of the oil-containing layer of the first cable 12. Embodiments of the elastomeric tube 26 can be, for example, established almost at the end of the first cable 12, and the conductor of the first cable 12 may contain partially open center conductor, and the oily layer of the first cable 12 may contain partially open, maslozapolnyaemyh, electrical insulating paper layer surrounding the conductor. The first cable 12 may also include, for example, partially open semi-conducting layer surrounding the paper layer, and a lead sheath surrounding semi-conducting layer, and an elastomeric tube is in contact with the open areas of the paper and semi-conducting layers and covers them. On ogran the sustained pressure sleeve 60 may be installed at least one locking element (70 or 72), in place, radially oriented relative to the plot elastomeric tube 26. For example, to limit the pressure sleeve 60 can be equipped with two locking element (70 and 72), at locations radially oriented relative to the end sections by elastomeric tube 26.

Elastomeric tube 26 can be manufactured, for example, from a composition comprising a fluoroelastomer and an epichlorohydrin. For example, embodiments of the elastomeric tube 26 can include from about 10 parts to about 60 parts of fluoroelastomer on 100 parts total weight of epichlorohydrin and fluoroelastomer. Embodiments of the elastomeric tube 26 can, for example, comprise from about 40 parts to about 90 parts of epichlorohydrin per 100 parts total weight of epichlorohydrin and fluoroelastomer.

Alternative embodiments of the invention may include, for example, and other limiting pressure device for cables. As shown in Fig, the cable may be a single main cable 12, branching on the first set of cables a, 153b and s, each of which has a conductor and oil-containing layer surrounding the conductor. Each cable of the second set of cables a, 155b and s also has a conductor. You can have multiple connections splicing 150A, 150b and 150C, and each connection splicing 150A, 150b and 150C is connected to the one conductor is on of the first cables a, 153b and s with one conductor of the second cable a, 155b and s. Electrically insulating elastomeric cover 122 may cover part of the main cable 12 and part of the first cables a, 153b and s. Elastomeric cover 122 may have a main part in the form of a glove with a single hole at the first end of the base part in the form of gloves and a set of apertures at the second end of the base part in the form of gloves, with a single inlet may pass through the main cable 12, and through each of the said sets of holes may receive respectively one of the first cables a, 153b and s. In alternative embodiments the elastomeric cover 122 can also be semiconducting.

Elastomeric cover 122 can be manufactured, for example, from a composition comprising a fluoroelastomer and an epichlorohydrin. For example, embodiments of the elastomeric cover 122 can include from about 10 parts to about 60 parts of fluoroelastomer on 100 parts total weight of epichlorohydrin and fluoroelastomer. Embodiments of the elastomeric cover 122 can, for example, comprise from about 40 parts to about 90 parts of epichlorohydrin per 100 parts total weight of epichlorohydrin and fluoroelastomer.

Main cable 12 and an elastomeric cover 122 may cover the bounding pressure shell 157. To limit the pressure shell 157 may have a single open the e at one end of the main part to limit the pressure shell 157 and the many holes on the other end of the main part to limit the pressure shell 157, at the same time in a single hole may pass through the main cable 12, and through each of the said sets of holes may be respectively one of the first cables a, 153b and s. Can also be used many limiting the pressure sleeves 160A, 160b and 160s, each of limiting the pressure sleeves 160A, 160b and 160s can cover one of the compounds splicing 150A, 150b and 150C, the conductor of one of the first cables a, 153b and s and conductor of one of the second cables a, 155b and s. To limit the pressure shell 157 and each of limiting the pressure sleeves 160A, 160b and 160s can include multiple twisted veins, which, in particular, can include multiple woven wires.

For crimping to limit the pressure shell around 157 elastomeric cover 122, as well as for crimping to limit the pressure sleeves 160A, 160b and 160s around the joints jointing 150A, 150b and 150C and parcel of the first cables a, 153b and s and second cables a, 155b and s, in several places to limit the pressure shell 157 and to limit the pressure sleeves 160A, 160b and 160s may be imposed several locking elements. So, for example, to limit the pressure shell 157 may be imposed at least one locking element 158 in place, radially oriented with respect to the section of the main cable 12. In addition, greiciausia pressure sleeves 160A, 160b and 160s may be imposed several locking elements 166a, 166b, s, a, 168b and 168s, respectively, at locations radially oriented relative to the end portions of the connection splicing 150A, 150b and 150C. In addition, several clamping elements 162, a, 164b and 164 C. may be imposed to limit the pressure sleeves 160A, 160b and 160s away from connections splicing 150A, 150b and 150C on both sides of the connection splicing 150A, 150b and 150C. In this sense at all to limit the pressure sleeves 160A, 160b and 160s, on the one hand, may be seized one common locking element 162 in one place, radially oriented relative to the main cable 12, and the locking elements a, 164b and 164 C. can be set individually for each of the limiting pressure sleeves 160A, 160b and 160s at the ends to limit the pressure sleeves 160A, 160b and 160s, on the other hand.

Embodiments of the invention may include electrically insulating, almost maslonapolnennye elastomeric tube 26a, 26b and 26C. Each of the elastomeric tubes 26a, 26b and 26C may cover a portion of the oil-containing layer of one of the first cables a, 153b and s. Elastomeric tube 26 can be, for example, installed at the ends of the first cables a, 153b and s, and the conductors of the first cable a, 153b and s may include partially open Central conductors, and when it is oily layers of the first cables a, 153b and s may contain partially open, maslonapolnennye, electrical insulating paper layers surrounding the conductors. Each of the first cables a, 153b and s may also include, for example, partially open semi-conducting layer surrounding the paper layer, and a lead sheath surrounding semi-conducting layer, and each of the elastomeric tubes 26a, 26b and 26C is in contact with the open areas of the paper and semiconductor layers of one of the first cables a, 153b and s and covers them. On each of the bounding pressure sleeves 160A, 160b and 160s can be installed at least one locking element (a, 170b, s, a, 172b or s), at locations radially oriented relative to the sections of elastomeric tubes 26a, 26b and 26C. For example, to limit the pressure sleeves 160A, 160b and 160s can be installed by two locking element (a, 170b, s, a, 172b and s respectively, at locations radially oriented relative to the end sections of elastomeric tubes 26a, 26b and 26C.

Elastomeric tube 26a, 26b and 26C can be manufactured, for example, from a composition comprising a fluoroelastomer and an epichlorohydrin. For example, embodiments of elastomeric tubes 26a, 26b and 26C may include from about 10 parts to about 60 parts of fluoroelastomer on 100 parts total weight of epichlorohydrin and fluoroelastomer. Embodiments of the ELAST the situations tubes 26a, 26b and 26C may, for example, comprise from about 40 parts to about 90 parts of epichlorohydrin per 100 parts total weight of epichlorohydrin and fluoroelastomer.

Although in this detailed description are mentioned as illustrations, numerous specific details of the invention are well-versed in the art it is obvious that it is possible to make other changes and modifications in the product that do not violate the idea and purpose of the invention. Accordingly, set forth in this detailed description, the invention presents no order imposing on him any restrictions. So, for example, references to such terms as installed, connected, attached, connected, coupled, etc. should be considered in a broader sense, i.e. as the installation, connection, attachment, connection splicing, coupling, etc. achieved directly, indirectly and/or structurally. The full purpose of the invention is defined only by the claims and their legal equivalents.

1. Device for limiting the pressure in the cable connection, comprising:
the first cable comprising a conductor and oil-containing layer surrounding the conductor;
a second cable comprising a conductor;
connection splice to connect the conductor of the first cable with the conductor of the second cable;
to limit the pressure sleeve covering the connection is out splicing and the conductors of the first and second cables, when this limit the pressure sleeve contains many twisted lived;
a lot of the clamping elements mounted on limiting the pressure sleeve in many places for a tight compression to limit the pressure sleeve around the said connection splicing and parcel of the first and second cables.

2. The device according to claim 1, characterized in that the said set of twisted veins contains a variety of woven wires.

3. The device according to claim 1, characterized in that the said fixing elements selected from the group consisting of clamps, twisting of the wire tape materials, cable cords and tubes cold shrink.

4. The device according to claim 1, characterized in that the said locking elements are mounted on limiting the pressure of the sleeve at locations radially oriented relative to the end portions of the connection splicing, or in places remote from the connection splicing, on both sides of the connection splicing.

5. The device according to claim 1, characterized in that it further comprises electrically insulating, almost maslozapolnyaemyh elastomeric tube covering the plot oily layer of the first cable, and at least one fixing element is installed to limit the pressure sleeve in place, radially oriented with respect to participation the ku elastomeric tube.

6. The device according to claim 5, characterized in that the securing elements are installed to limit the pressure sleeve at locations radially oriented relative to the end sections of the elastomeric tube.

7. The device according to claim 5, wherein the elastomeric tube is installed almost near the end of the first cable, and the conductor of the first cable contains a partially outdoor center conductor, and the oily layer of the first cable contains partially open, maslozapolnyaemyh, electrical insulating paper layer surrounding the conductor, and the first cable further comprises a partially open semi-conducting layer surrounding the paper layer, and a lead sheath surrounding semi-conducting layer, and an elastomeric tube is in contact with the open areas of the paper and semi-conducting layers and covers them.

8. The device according to claim 5, characterized in that the elastomeric tube contains a composition comprising a fluoroelastomer and an epichlorohydrin.

9. The device according to claim 8, characterized in that the elastomeric tube contains from about 10 weight parts to about 60 parts by weight of the fluoroelastomer on 100 total parts by weight of the fluoroelastomer and epichlorohydrin, with the elastomeric tube contains from about 40 weight parts to about 90 parts by weight of epichlorohydrin per 100 sums the ary weight parts of fluoroelastomer and epichlorohydrin.

10. The device according to claim 1, characterized in that:
the first cable includes a single main cable, branching on the first set of cables, each of which includes a conductor and oil-containing layer surrounding the conductor;
the device further comprises:
the second set of cables, each of which includes a conductor;
many compounds splicing, each of which are connected to one conductor of the first cable with the conductor of one of the second cables;
electrically insulating elastomeric cover that covers part of the main cable and the portion of the first set of cables, while the elastomeric cover has the main part in the form of a glove with a single hole at the first end of the base part in the form of gloves and a set of apertures at the second end of the base part in the form of gloves, with a single inlet includes basic cable, and through each of the said sets of holes passes one of the first set of cables;
to limit the pressure shell covering the main cable and the elastomeric cover, thus limiting the pressure shell has a single hole at one end to limit the pressure shell and the many holes on the other end to limit the pressure shell, with single hole includes basic cable, and through each one by mentioning is that many of the holes passes respectively one of the first cable;
many limit the pressure sleeve, each limiting the pressure sleeve covers one connection, one conductor of the first cable and the conductor of one of the second cables; thus limiting the pressure shell, and each of limiting the pressure sleeve contains many twisted lived;
many locking elements installed in numerous places on limiting the pressure shell and each of limiting the pressure sleeve for crimping to limit the pressure shell around the elastomeric cover and for crimping the corresponding limit the pressure sleeve around each connection splicing and parcel of each cable of the first set of cables and a second set of cables.

11. The device according to claim 10, characterized in that the said set of twisted veins contains a variety of woven wires.

12. The device according to claim 10, characterized in that the said fixing elements selected from the group consisting of clamps, twisting of the wire tape materials, cable cords and tubes cold shrink.

13. The device according to claim 10, characterized in that at least one fixing element is installed to limit the pressure shell in place, radially oriented with respect to the section of the main cable.

14. The device according to claim 10, characterized the eat, which further contains a variety of electrically insulating, almost maslozapolnyaemyh elastomeric tubes, each of the elastomeric tubing covers part of the oil-containing layer of one of the first cables, and each of limiting the pressure sleeve has at least one locking element in place, radially oriented with respect to the site elastomeric tube.

15. The device according to 14, characterized in that the locking elements are installed on each of the limiting pressure of the sleeve at locations radially oriented relative to the end sections of elastomeric tubing.

16. The device according to 14, wherein the elastomeric cover covers the portion of the elastomeric tube.;

17. The device according to 14, wherein each of the elastomeric tube can be mounted near one end of the first cable, and each of the conductors of the first cable contains a partially outdoor center conductor, and oil-containing layer of each of the first cables contains partially open, maslozapolnyaemyh, electrical insulating paper layer surrounding the conductor, and each of the first cable further includes a partially open semi-conducting layer surrounding the paper layer, and a lead sheath surrounding pressurizat odasi layer, and each elastomeric tube is in contact with the open areas of the paper and semiconductor layers of one of the first cables and covers them.

18. The device according to 14, wherein each elastomeric tube contains a composition comprising a fluoroelastomer and an epichlorohydrin.

19. The device according to 14, characterized in that the elastomeric tube contains from about 10 weight parts to about 60 parts by weight of the fluoroelastomer on 100 total parts by weight of the fluoroelastomer and epichlorohydrin, and in which the elastomeric tube contains from about 40 weight parts to about 90 parts by weight of epichlorohydrin per 100 total parts by weight of the fluoroelastomer and epichlorohydrin.

20. The device according to claim 10, characterized in that the elastomer cover provides a composition comprising a fluoroelastomer and an epichlorohydrin.



 

Same patents:

FIELD: electricity.

SUBSTANCE: product consists of protective core that has, at least, two end sections, many retaining cores and, at least, one cold shrink material that is kept in stretched condition above, at least, part of protective core and, at least, part of each retaining core. One end of each of retaining cores is mated with the corresponding end section of protective core. Retaining cores, protective core and cold shrink material as a whole annularly surround the equipment component so that cold shrink material when shrinking is set on part of equipment component after extracting the end of one of many retaining cores from the corresponding end section of protective core.

EFFECT: sealing or other kind of protection of equipment components such as cables or places of their connection.

15 cl, 31 dwg

Sealing device // 2401494

FIELD: electricity.

SUBSTANCE: concave body is suggested with open outer edge and several parts of perimetre adjacent with open body edge. Elastomeric film is attached to concave body perimetre parts along open concave body edge. Elastomeric film is suited for coupling one or more cables when the cables are located within the body to isolate them from environmental conditions.

EFFECT: invention improves device impermeability and provides possibility of reuse when cable or joint is restored.

10 cl, 5 dwg

FIELD: subsurface laying of screened communication cables designed for local communication networks to operate at high frequencies and as "last-mile" cables.

SUBSTANCE: proposed terminator for copper-conductor communication cables designed for use in structured cable systems of categories 5 and 5e (up to 100 MHz and higher) has sleeve-shaped plastic body with round bottom on one end and cylindrical opening on opposite end, spliced conductors of cable ends being spliced which are potted in sealing compound within cable terminator; spliced insulated copper conductors are sealed with aid of type UY-2 connectors accommodating water-repelling filler; spliced conductors are disposed inside reticular screen made in the form of reticular copper sleeve reliably electrically connected to screens of cable ends being spliced in structured cable networks by winding sub-screen tinned copper wires of cable on sleeve and potting core splice of cable screened with reticular copper sleeve in terminator by cold-hardened polyurethane sealing compound VILAD-13.

EFFECT: enlarged functional capabilities of terminator.

1 cl, 6 dwg

FIELD: cable connectors for power transfer between power supply and borehole instrument modules of downhole telemetering system in the course of boring.

SUBSTANCE: proposed electrical connector has one or more contact pairs insulated from one another and electrical conductors connected to internal and external opposing contacts of contact pairs. External contacts of contact pairs are made in the form of semi-rings which are installed opposite one another within flexible insert and are free to move toward one another under impact of external pressure. Proposed method for manufacturing this electrical connector includes connection of electrical conductors to contacts, of which external ones are made in the form of semi-rings, integral with auxiliary bushing and wrapped with band made of polymerizing or curing material, such as raw rubber, on top of auxiliary bushing. Wrapping procedure includes filling of cavities followed by placing conductors along blank axis and final wrapping until diameter of blank becomes greater than outer diameter of electrical connector. Blank is fitted between top and bottom cases of mold, compressed at the same time heating it, whereupon auxiliary bushing is completely removed by boring inner diameter of blank until semi-rings are fully separated.

EFFECT: enhanced power capacity, reliability, and service life of power supply.

5 cl, 6 dwg

FIELD: electrical connector and method for connecting coaxial cable lead to terminal.

SUBSTANCE: proposed connector has nut incorporating receiving port for connection to terminal. Nut also has circular clip. Connector also has base member one of whose ends is provided with projection to be inserted through clip hole. Other end of base member incorporates part of inner surface. Connector also has support with flange and body. Support is free to move for compressing external cable conductor and shell with support body and part of inner surface to obtain distal compression. Tightening nut with terminal compresses projection between support flange and circular clip to obtain proximal tightness.

EFFECT: enhanced tightness, reduced manufacturing and maintenance charges.

10 cl, 11 dwg

FIELD: electrical engineering.

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EFFECT: simplified design, enhanced reliability of cable box.

1 cl, 7 dwg

FIELD: devices for formation of electrical connections in vehicles; the repair kit is designated for repair of a failed electrical device of a vehicle connected to the vehicle electrical equipment system by several wires.

SUBSTANCE: the repair kit has a new electrical device installed instead of the failed one, several wires connected to the new electrical device and a built-up protective box designated for protection of the electrical connection made by joining of the wires of the new electrical device and the wires of the vehicle electrical equipment system. The built-up protective box has a body with several holes insulated from one another. The packing rings positioned in each hole of the body intended for arrangement of the new electrical device section of the connected respective wire of the vehicle electrical equipment system and the respective new electrical device form in fact a waterproof packing around the section of the wires connected to one another by joining. The protective built-up box has also a cover joined to the body. The claimed repair kit is preferably designated for replacement of the sensor of the content of oxygen in exhausted gases failed on the vehicle.

EFFECT: simplified aftersale servicing of the vehicle.

9 cl, 8 dwg

Cable sealing // 2256992

FIELD: flexible coatings and method for cable splice sealing.

SUBSTANCE: flexible coating for sealing cable splice without external heating has gel layer and supporting layer; its flexibility is sufficient to enable manually making gathers around cable-to-splice transition sections of smaller size in case there is gel at this transition for packing resulting seal. Supporting layer preferably made of low-density polyethylene ensures mechanical strength and facilitates coating procedure. Evaporation preventing layer preferably made of aluminum may be applied to supporting layer. Protective layer may be applied to evaporation preventing layer. Adhesion reducing material may be used at least on one end of gel layer facing supporting layer to provide for regulating coating placed on cable splicing sections. Flexible or rubber band may be wound on applied coating for gel compression.

EFFECT: provision for reusing seal obtained; enhanced sealing length.

38 cl, 19 dwg

FIELD: repairs of communication line cables laid in soils of all kinds in cable conduits, manifolds, and tunnels.

SUBSTANCE: proposed method includes installation of split lead bushing on aluminum sheath of each cable followed by shifting both bushings along cables away from spliced joint of cable conductors, running exposed sections of aluminum sheath over with tin, fitting bushings back in place, and soldering them to tinned sections of aluminum sheath; at the same time longitudinal seam on bushings is soldered, ends of bushings are sealed by thermosetting tape, junction box is installed above spliced joint, and its butt-ends are soldered to bushings. In order to repair outer shielding hose, junction box and adjacent cable sections are covered with sealing compound and moist-cured bandage.

EFFECT: improved repair quality, enhanced service life of junction box due to elimination of electrochemical corrosion.

3 cl, 1 dwg

The invention relates to the connecting couplings designed for jointing construction of the lengths of the electric communication cables laid in cable ducts, sewers, tunnels, walls of buildings

FIELD: repairs of communication line cables laid in soils of all kinds in cable conduits, manifolds, and tunnels.

SUBSTANCE: proposed method includes installation of split lead bushing on aluminum sheath of each cable followed by shifting both bushings along cables away from spliced joint of cable conductors, running exposed sections of aluminum sheath over with tin, fitting bushings back in place, and soldering them to tinned sections of aluminum sheath; at the same time longitudinal seam on bushings is soldered, ends of bushings are sealed by thermosetting tape, junction box is installed above spliced joint, and its butt-ends are soldered to bushings. In order to repair outer shielding hose, junction box and adjacent cable sections are covered with sealing compound and moist-cured bandage.

EFFECT: improved repair quality, enhanced service life of junction box due to elimination of electrochemical corrosion.

3 cl, 1 dwg

Cable sealing // 2256992

FIELD: flexible coatings and method for cable splice sealing.

SUBSTANCE: flexible coating for sealing cable splice without external heating has gel layer and supporting layer; its flexibility is sufficient to enable manually making gathers around cable-to-splice transition sections of smaller size in case there is gel at this transition for packing resulting seal. Supporting layer preferably made of low-density polyethylene ensures mechanical strength and facilitates coating procedure. Evaporation preventing layer preferably made of aluminum may be applied to supporting layer. Protective layer may be applied to evaporation preventing layer. Adhesion reducing material may be used at least on one end of gel layer facing supporting layer to provide for regulating coating placed on cable splicing sections. Flexible or rubber band may be wound on applied coating for gel compression.

EFFECT: provision for reusing seal obtained; enhanced sealing length.

38 cl, 19 dwg

FIELD: devices for formation of electrical connections in vehicles; the repair kit is designated for repair of a failed electrical device of a vehicle connected to the vehicle electrical equipment system by several wires.

SUBSTANCE: the repair kit has a new electrical device installed instead of the failed one, several wires connected to the new electrical device and a built-up protective box designated for protection of the electrical connection made by joining of the wires of the new electrical device and the wires of the vehicle electrical equipment system. The built-up protective box has a body with several holes insulated from one another. The packing rings positioned in each hole of the body intended for arrangement of the new electrical device section of the connected respective wire of the vehicle electrical equipment system and the respective new electrical device form in fact a waterproof packing around the section of the wires connected to one another by joining. The protective built-up box has also a cover joined to the body. The claimed repair kit is preferably designated for replacement of the sensor of the content of oxygen in exhausted gases failed on the vehicle.

EFFECT: simplified aftersale servicing of the vehicle.

9 cl, 8 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed water-and-gas-tight stuffing box designed for terminating ends of communication cable line, including plastic-sheathed telephone cables with polyethylene insulated conductors, in capacity of 100 to 600 pairs directly in switchgear cabinet on vertically mounted cables which can be or not held at gage pressure and with water-repelling material filled core has shield connector secured on aluminized polyethylene cable sheath in contact with conical surface of through hole at input end of body; plastic cable sheath is filled within stuffing box with cold-cured polyurethane sealing compound; each conductor is covered with plastic insulating layer throughout its entire length.

EFFECT: simplified design, enhanced reliability of cable box.

1 cl, 7 dwg

FIELD: electrical connector and method for connecting coaxial cable lead to terminal.

SUBSTANCE: proposed connector has nut incorporating receiving port for connection to terminal. Nut also has circular clip. Connector also has base member one of whose ends is provided with projection to be inserted through clip hole. Other end of base member incorporates part of inner surface. Connector also has support with flange and body. Support is free to move for compressing external cable conductor and shell with support body and part of inner surface to obtain distal compression. Tightening nut with terminal compresses projection between support flange and circular clip to obtain proximal tightness.

EFFECT: enhanced tightness, reduced manufacturing and maintenance charges.

10 cl, 11 dwg

FIELD: cable connectors for power transfer between power supply and borehole instrument modules of downhole telemetering system in the course of boring.

SUBSTANCE: proposed electrical connector has one or more contact pairs insulated from one another and electrical conductors connected to internal and external opposing contacts of contact pairs. External contacts of contact pairs are made in the form of semi-rings which are installed opposite one another within flexible insert and are free to move toward one another under impact of external pressure. Proposed method for manufacturing this electrical connector includes connection of electrical conductors to contacts, of which external ones are made in the form of semi-rings, integral with auxiliary bushing and wrapped with band made of polymerizing or curing material, such as raw rubber, on top of auxiliary bushing. Wrapping procedure includes filling of cavities followed by placing conductors along blank axis and final wrapping until diameter of blank becomes greater than outer diameter of electrical connector. Blank is fitted between top and bottom cases of mold, compressed at the same time heating it, whereupon auxiliary bushing is completely removed by boring inner diameter of blank until semi-rings are fully separated.

EFFECT: enhanced power capacity, reliability, and service life of power supply.

5 cl, 6 dwg

FIELD: subsurface laying of screened communication cables designed for local communication networks to operate at high frequencies and as "last-mile" cables.

SUBSTANCE: proposed terminator for copper-conductor communication cables designed for use in structured cable systems of categories 5 and 5e (up to 100 MHz and higher) has sleeve-shaped plastic body with round bottom on one end and cylindrical opening on opposite end, spliced conductors of cable ends being spliced which are potted in sealing compound within cable terminator; spliced insulated copper conductors are sealed with aid of type UY-2 connectors accommodating water-repelling filler; spliced conductors are disposed inside reticular screen made in the form of reticular copper sleeve reliably electrically connected to screens of cable ends being spliced in structured cable networks by winding sub-screen tinned copper wires of cable on sleeve and potting core splice of cable screened with reticular copper sleeve in terminator by cold-hardened polyurethane sealing compound VILAD-13.

EFFECT: enlarged functional capabilities of terminator.

1 cl, 6 dwg

Sealing device // 2401494

FIELD: electricity.

SUBSTANCE: concave body is suggested with open outer edge and several parts of perimetre adjacent with open body edge. Elastomeric film is attached to concave body perimetre parts along open concave body edge. Elastomeric film is suited for coupling one or more cables when the cables are located within the body to isolate them from environmental conditions.

EFFECT: invention improves device impermeability and provides possibility of reuse when cable or joint is restored.

10 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: product consists of protective core that has, at least, two end sections, many retaining cores and, at least, one cold shrink material that is kept in stretched condition above, at least, part of protective core and, at least, part of each retaining core. One end of each of retaining cores is mated with the corresponding end section of protective core. Retaining cores, protective core and cold shrink material as a whole annularly surround the equipment component so that cold shrink material when shrinking is set on part of equipment component after extracting the end of one of many retaining cores from the corresponding end section of protective core.

EFFECT: sealing or other kind of protection of equipment components such as cables or places of their connection.

15 cl, 31 dwg

FIELD: electricity.

SUBSTANCE: sealing device is intended for design of cables intended for underground usage. The pressure-limiting device for cables may contain, for example, the first cable including a conductor and an oil-containing layer encapsulating the conductor and the second cable having a conductor. At the connection spot the first cable conductor may be connected to that of the second cable. The connection spot and the conductors of the first and the second cables may be covered with a pressure-limiting hose. Installed at multiple spots o the pressure-limiting hose may be multiple ties for crimping the pressure-limiting hose round the connection spots and the first and he second cables sections. The pressure-limiting device may be implemented in the form of a hose on a single-strand cable or in the form of a breakout with individual hoses on a multi-strand cable such as a three-strand cable.

EFFECT: oil-containing cables sealing improvement.

20 cl, 12 dwg

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