Cable sealing

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

 

The present invention relates to a flexible coating and method for performing shutter cable splicing by use of the coating.

Traditionally, the paddles cable splices may be subjected to heat shrinkage during thermal effects so that when using heat shutter could be exposed to heat and closely relate to the area of cable splicing, providing a good seal. However, there is an increasing need to use the so-called paddles that are applied in a cold state, which can be performed without the use of heat or other external energy source.

Has already been proposed closures of several types used in cold condition. Some of them include tape, which can easily coil around the cable splice. Many closures include gel or materials gel type for the reason that they have an excellent compaction properties especially in the case when the gates are conveniently close and pressed against the object that it is desirable to condense. Existing gates with hard shell disclosed in the International application WO-A-9516500 made with cameras for the content of the gel. Although this design provides a superior seal, the predefined size of the shutter with the solid shell requires a range of gates, which must be provided in order to have the possibility of placing them in cable splices various shapes and sizes.

The present invention searches for ways to address these and other problems existing in the present level of technology, as well as ways to ensure the sealing element and method that can easily and economically implemented without special structural adaptation to ensure the possibility of creating a cable shutter, which can be reused and which is applicable over a wide range of sizes and shapes of cable splices.

These and other objectives are achievable in accordance with the present invention by applying a flexible cover to the shutter splicing, with a covering made in accordance with the present invention, contains a gel layer and a support layer, a gel layer is separated from the reference layer or superimposed layers to it, and the floor when it wraps around the transition from the first elongated object with a diameter of 110 mm to the second elongated object with a diameter of 41 mm with a support layer on the outside of the gel layer (and preferably in direct contact with him) is flexible enough to manually gather in folds around the second object with gel, sealing them for the thief. The gel layer and the support layer can be separately from each other around the transition between the first and second cables or other conduits, for which it is desirable to make the seal, with the preferred direct contact of the gel layer and the support layer to each other, though they can be laid other thin flexible layers, for example layer to prevent evaporation. More preferably, the gel layer and the reference layer must feel each other to provide a uniform leaf coverage.

In the preferred coatings made according to the present invention, the substance to reduce adhesion is used, at least part of the surface of the gel layer facing away from the support layer; or alternatively can be used a gel with low adhesion. This gel with reduced adhesion facilitates overlay (wrap) coverage when using it, as there will be explained hereinafter, but are not excluded and cover with gel without reduced adhesion. Another preferred form of the flexible covering in accordance with the present invention may contain a layer to prevent evaporation, which can be located on the surface of the support layer facing away from the used gel, or on a surface facing to the fact used to gel, or layer to prevent evaporation can be included as an intermediate layer with the support layer, or layer to prevent evaporation may be provided separately from the base layer when placing it between the support layer and the gel layer. The coating may include as an agent to reduce adhesion and layer to prevent evaporation.

The gel layer in the coatings made according to the present invention should be chosen based on known criteria to ensure excellent sealing qualities, while supporting layer should contain the gel and prevent its extrusion of the shutter is made of coating, the operation of the shutter. In addition, the support layer provides mechanical protection and improves the sealing properties of the coating.

Flexible coating comprising a gel layer in accordance with the invention, can be wrapped around a cable splice in the presence of a gel layer facing inward, allowing easy transition from the larger diameter cable splicing to a smaller diameter cable with simultaneous useful software excessively elongated length of the seal. The gel layer is missing in cements and other known seals the unique ability to maintain an effective seal in that case is, when coating areas, advocating for cable splicing, gather in folds around the cable (s) and /or reduced end portion of the transition area (and preferably attached around the circumference). This provides greater versatility and easy implementation of end fitting, allowing mechanically simple covering made in accordance with this invention apply to a wide range of shapes and sizes of cables and splices.

To facilitate handling of the floor and work on editing the outer surface is usually sticky gel with or without the above-mentioned substances to reduce adhesion may be fully or partially covered deleted covering layer, preferably consisting of the so-called separation of paper. This covering layer shields the surface is tacky gel layer and thus facilitates the handling of the coating. When mounting the covering layer is removed, and the stickiness of the gel layer is used to overlay the cover and hold it at the usual place.

The inventors have found that in some cases it may be desirable difficult (though not necessarily unacceptable) adjustment of the coating, as soon as the helium layer adheres to the cable splice. For this reason, the preferred one is camping conditions namely, that at least part of the gel layer on the flexible covering made in accordance with the present invention provided with the above-mentioned and intended to reduce the adhesion of the substance, for example, in the form of powder.

This substance to reduce adhesion, which may be termed forming a second non-removable covering layer, reduces the stickiness to the extent that is sufficient for the comfortable adjustment of the position of the cover when it is placed on top of the cable splice. In a preferred variant embodiment of the invention the substance to reduce the adhesion of the powder contains talc. In an alternative embodiment, may be coated with a gel layer, at least part of which has a small or essentially zero stickiness, it is possible, without any covering layer and/or may, without any substance to reduce adhesion and in the presence of a layer that prevents evaporation, or without it.

Preferably, the coating contains a middle section with a substance to reduce adhesion and two adjacent outer section, provided the above-mentioned substance. Before coating the middle section is opened by removing the middle section of the covering layer (if it exists), whereas each of the outer sections, p is edocfile, secure the outer sections of the removed coating layer. Can be used single piece covering material to overlap both of the outer sections and the middle section of the gel layer, or can be used three pieces of coating material, respectively, to overlap the middle section and outer sections, there is also the possibility of a preferred application of the single segments covering material to overlap only the outer sections while leaving the middle section is covered by only a substance to reduce adhesion.

Preferably, the supporting layer contains essentially continuous sheet, essentially, elastomere material having suitable flexibility and thickness (easily determined by trial and error or by using the methods described here below) to achieve these goals wraps. Such a layer can be selected to provide a good mechanical strength along with a good connection to the gel layer. One example of a preferred material for the support layer is the use of polyethylene and especially polyethylene, linear low density, with or without known contributing to the adhesion surface treatments or coatings.

Layer to prevent evaporation is not significant, but it can be prescribed the n on the support layer, as indicated previously, preferably, on the surface facing away from the gel layer. Such a layer to counteract evaporation prevents transmission of wet steam through the floor. Mainly, the layer for preventing the evaporation contains aluminum, such as aluminum foil. The aluminum layer provides an excellent barrier for wet steam, which may be particularly desirable in those applications where the shutter cable splicing is not completely filled with the sealing material and/or other materials.

Mainly, a protective layer provided on a side of the cover facing away from the gel layer. Such a protective layer, preferably, is selected to provide increased resistance to wear and puncture. Examples of the selection of suitable materials are polyethylene terephthalate (PET) or polyethylene (LDPE) low density.

As mentioned above, the shutter made in accordance with the present invention, includes a flexible coating. In addition, such a shutter may contain other elements, such as a flexible ribbon for the application of pressure on the gel surface.

The present invention additionally provides a method of creating a cable shutter covering cable splicing, and the method comprises the stages: nalog is particularly on cable splicing flexible coatings containing gel layer and support layer, and preferably of such coverage, as defined above; regulating the position of the flexible cover, as it is desirable and in such a way that it extends beyond the splice over a connecting cable or transitional areas with a reduced diameter compared to the diameter of the cable splice; wrapping a flexible covering around the cable splice and picking up coverage in the folds and fastening them around the previously mentioned cable or areas of transition. Preferably, the method includes a stage of winding the tape around the cover so as to cover the shutter cable. Wrapping tape around the cover puts pressure on the gel layer, increasing its sealing action. This tape preferably is an elastic plastic or rubber, and its elasticity ensures that the gel coating layer is held under compression after installation, for example, in the case of cyclic changes in external temperature, which can vary in the range from -30 to +60°C. in Addition, a rubber band tends to increase resistance to punctures in the resulting shutter cable splicing.

Before applying a flexible cover cable splicing (filled or unfilled), preferably, is supplied (plastic) p is okladki or more tape for the formation of a solid surface.

Furthermore, in addition to its use for direct wrapping of "dry" closings splices covering made in accordance with the present invention, is especially suitable for filled splices, comprising a liquid vehicle for encapsulatio, and preferably curable liquid vehicle for encapsulatio known type, for example, epoxy system encapsulatio having two parts. In this case, the flexible cover may initially turn around the cable splice so that the formed shell having a centered hole, the liquid of encapsulatio flows through this hole, and the hole then closes the crease and defends to retain liquid funds to encapsulate before and during curing. Another possibility is to pre-forming filled splicing by known methods and in protecting it through a coating made according to the present invention, filled with pre-formed by the merger.

The invention will be further explained with reference to shown as examples of variants of its embodiment with them the accompanying drawings, in which:

figure 1 schematically shows the et in a partially opened form a flexible coating, made in accordance with the present invention;

figure 2 shows, in axonometric projection, filled and wrapped plated cable splicing;

figure 3 shows, in axonometric projection, cable splicing, provided with a plastic gasket;

figure 4 shows, in axonometric projection, the method of winding a covering made in accordance with the present invention, around a cable splice, shown in figure 2;

figure 5 shows, in axonometric projection, the mapping method (transparent) tape on the wrapped cable splicing, shown in figure 4;

6 shows in more detail, in axonometric projection, the part picked shutter, shown in figure 5;

7 to 10 show, in axonometric projection, the mapping method on inkapsulirovanne filled cable splice cover made in accordance with the present invention;

11 schematically shows, in axonometric projection, the preferred option flexible coatings made in accordance with the present invention;

Fig and Fig schematically show, in axonometric projection, method of flexible pavement overlay, shown at 11;

Fig-19 described here illustrate further the method of testing for selection pokr is involved.

Flexible floor 10, shown schematically in figure 1, contains this private version of its embodiment four layers: the gel layer 1; the reference layer 2; an optional layer 3 to prevent evaporation, and an optional protective layer 4.

The gel layer 1 may consist of a thermoplastic gel is essentially known. Support layer 2, which in a preferred variant embodiment of the invention presents a low-density polyethylene, provides mechanical stability of the gel. Layer 3 to prevent evaporation in this variant embodiment of the invention is a barrier to the transfer of wet steam formed by the layer of aluminum foil. Plastic support layer 2 ensures good communication respectively between the aluminum and the gel even in the case when the covering 10 is in the folded position.

The protective layer 4, which in this variant embodiment of the invention is a layer of polyethylene (PE) or polyethylenterephtalate (PET) and superimposed on the other side of the aluminum foil that protects the aluminum and helps resist punctures and abrasion, and provides chemical resistance to the environment. It should be understood that the layer 3 to prevent evaporation and/or the protective layer 4 may not be used depending on the actual used and the final terms of implementation, the effect of which shall be the floor. Similarly, the thickness of the coating, which largely corresponds to the thickness of the gel layer 1, will depend on the destination of use coverage. Although it is preferable total thickness approximately in the range of 1 to 1.5 mm, may provide coverage that has much increased or somewhat reduced thickness.

Cable splicing 20, shown in figure 2, is wrapped delaying tape 18, which holds any filling material. Check the tape 18 is placed on the filling material, provides a solid surface that can be superimposed flexible covering made in accordance with the invention, as will be explained with reference to figure 4.

Solid or smoothed surface can also be obtained by applying the strip 12, as shown in figure 3, where the strip 12 is made of plastic and has a flexible fingers 13, protruding in the direction of the cables 21. The tape 19 is wound around the cable 21 at the end sections of the flexible fingers 13 to hold these end sections. Through this we obtain a smooth and continuous transition from the diameter of the splice to the cable diameter.

As shown in figure 4, aligned or utverjdenie splicing 20, (figure 2, or IG) can be wrapped with a flexible floor 10, made in accordance with the present invention, the gel layer 1 (figure 1), converted to the merger. After this elastic tape 11 is tightly wrapped around the cover 1, as shown in figure 5. Preferably, the tape is made of plastic or rubber. Tape can be self-adhesive.

Figure 6 in more detail shows part of the resulting shutter 15. The tight wrapping of the tape 11 in the end leads to compression of the gel coat layer 10 along the length of the shutter, resulting in exceptional by its length is the length of the seal. This compression is especially useful near the end sections of the gate, because the gel layer provides a good seal relative to the cable 21. In addition, the tape 11 collects flexible floor 10 in the crease, creating contact between the sections of the gel in consecutive folds 9. You can see that the coating made in accordance with the invention, provides shutter having excellent sealing properties along with the fact that installation is easy with a wide range of shapes and sizes of cable splices and cable. It should be noted that for the application of the shutter does not require the use of devices or exposure to heat. In addition, the shutter has the ability to re-restore due to the fact that the tape 11 may be removed, then cover 10 can be opened and re-used in connection with the presence of the adhesion strength, the result can be a net release of gel from the surface of contact with itself or with other bodies. Provided by the invention, the shutter can therefore be used both on a temporary and permanent basis.

7-10 shows the method of applying a flexible cover made according to the present invention, for manufacturing a cable bolt, filled by means of encapsulatio. As shown in Fig.7, in the first stage, the coating 10 is applied directly to a cable splice 20 without the prior filling of jointing as shown in figure 2 and figure 3. To enhance the sealing end parts of the shutter gel tape 14 wound on the cables 21 before applying a flexible cover 10. However, these gel tape 14 are not essential and may not be used at various occasions seal.

In the second stage of the method, as shown in Fig, the cover 10 is folded in such a way as to form a bag 19 having a hole 8, is facing up. On both sides of the hole 8 of the flange cover 10 suites with each other for closing the sides of the bag. In addition, sealing tape 17 wound around the coating of the end sections storey the coating layer 10 in both cases will ensure a good seal, preferably the amplified effect of gel ribbons 14 (Fig).

At the third stage of the method, as shown in Fig.9, the liquid 16 to encapsulate is poured into the bag 19 through the opening 8, and allow him to fill the bag.

In the fourth stage of the method, as shown in figure 10, the bag is closed by folding it at the top, and the tape 11 is tightly wrapped around the cover 10, holding under the action of compression of the gel coating. This completes the creation of the shutter 15 of the cable.

When the flexible cover 10 is superimposed on the splicing of the cable, the adhesive structure of the gel layer 1 (figure 1) will cause the coating to stick to the cable splice. Although this "stickiness" helps to keep the cover in its regular place, it makes no more than perfectly comfortable adjustment of the coating. In accordance with an additional aspect of the present invention the portion of the gel layer 1 provided with the substance 6 to reduce adhesion to facilitate blending of the coating on the cable splicing and to enable some control (for example, to move the cover along the length of the cable splicing). The substance 6 to reduce adhesion, mainly, is a powder, such as talcum powder.

As shown in figure 11, the portion of the gel layer, which imposed the substance 6 d is I reduce adhesion, is the middle section 8 of the side of the gel layer 1 facing away from the support layer 2 (i.e. facing up figure 11). On both sides of the middle section 8 has the outer or side sections 9, on which is imposed the substance 6 to reduce adhesion. To facilitate handling of the cover 10 prior to its imposition removed the covering layer 5 is superimposed on each of the outer sections 9. In a preferred variant embodiment of the invention the covering layer 5 consists of a special paper wrappers, from the so-called separation of paper. Instead of two separate wrappers from paper to decouple each of the outer sections 9 may be used singly separating paper, covering all flexible floor 10.

As shown in Fig, floor 10, as shown at 11, preferably overlaid with a covering layer 5 is still in the usual place. The middle section 8 with a substance to reduce adhesion is predominantly large enough to cover all cable splicing. After regulation of the cover 10, the regulation of which may include a pair of edges of the cover 10, the covering layer 5 (paper wrappers) is removed and compressed to each other, the two outer adhesive section. Because these outer sections are sticky, they will svjazyvaites is with each other. Subsequent additional stages can be performed as shown, for example, figure 5 or Fig.

It should be noted that the invention may include closures of almost any size. You may need only one device in the form of a pair of scissors or knife to cut the covering 10 in size and/or cut any tape that may be required. The mechanical force, such as force axial stretching, does not affect the sealing shutter. Due to the fact that the gel coating layer made according to the present invention provides a shutter that has the effect of automatically repairing floors, compressible gel is able to seal small punctures caused by sharp objects. In addition, the gel layer automatically provides space between any connectors contained in the merger, and outer layers of the shutter, this prevents punctures from the inside.

Closures containing coating made in accordance with the present invention, can be used for remote communication cables and power cables.

In addition to the advantages of lightweight positioning during Assembly, provided the material placed on the gel and is designed to reduce adhesion, additional benefits commitment is concentrated within the possibility of repeated access to the interior of the shutter after its installation. The gel material from talc to reduce adhesion on the surface of the gel may purely be separated essentially without destroying the gel (the gel or other object) from the surface to which the gel is pressed in contact conditions. This clean separation is achievable in a much wider temperature range separation, for example in the range from -45 to +80 or 90°With than the range that can be achieved with appropriate gel without talc or sealant putty. Gel without talc tends undesirable it is difficult to separate when the temperature separation in the range that is below -15°whereas mastic tend to undergo impaired ability to adhesion at all temperatures separation.

The unique ability of the gel to maintain seals collected in the folds of the coatings made in accordance with the invention is demonstrated as follows. Suitable flexible support with a thickness of less than 0.1 mm, containing alternating layers of aluminum and films of low density polyethylene, coated with a gel to a total coating thickness of about 1.5 mm This cover is wrapped around the transition between the two hollow pipes with a diameter of 110 mm and 41 mm Overlay coating is compacted around the pipelines by dragging Kalinicheva around it at different tensile stresses, measured by a spring balance, or, more preferably, the applied static loads attached to the cable ties for the formation of a shutter in accordance with the invention, when the end sections of the cover, gathered around their respective pipelines. Applied internal gas pressure of 5 kPa, while the shutter is immersed in a water bath at different temperatures. Access to the surface of bubbles collected from end-areas of the coating indicates that the applied cable connection tensile force is insufficient to allow the gel to seal to resist internal gas pressure. For the above specific coverage found that the tensile stress relationships that are only in the range from 69 to 98 N (7 to 10 kgf), is sufficient to retain the gas under test and at a temperature of 22°but it increases to about 98-196 N (10-20 kg) at the test temperature, component 45°and, approximately, increases to 127-235 N (up 13-24 kgf) at the test temperature equal to -10°C. by Way of comparison established that thicker and less flexible coating coated with the gel require the application of tensile force to relations within from about 147 to more than 265 H (from 15 to more than 27 kg) with the purpose of the retention of gas even at 22° With, whereas coverings mastics, tend to be damaged at all temperatures, even in those cases when the link is stretched by a force, which reaches the value equal to more than 265 H (27 kg).

When the links to illustrate Fig-19 order of operations test pressure is as follows.

1. The scope of testing

This method covers the determination of the force (N)required to gather in folds and seal gel coat with exaggerated dimensions around the cable of small diameter.

2. Samples and equipment

(a) gel coating: according to the choice test (preferably a width of 450 mm, length 550 mm);

b) a tube of high density polyethylene (HDPE): outside diameter of 110 mm, length - 400 mm;

c) a tube of high density polyethylene (HDPE): outer diameter - 41 mm, length - 700 mm;

d) communication cable: commercially available, self-locking, resistant against UV radiation Nylon 66 corresponding length, with a head width of 14.2 mm and a head thickness of 8.8 mm, and having a tail width of 8.9 mm and tail thickness 2 mm, with teeth formed on the tail width for engagement with the head part with the aim of smallacombe communication as the tail is pulled through the head;

e) water bath at temperatures of 22°and 45°C;

f) water ban is in ice water (0° C);

(g) cargo 27 kg, 24 kg, 20 kg, 15 kg, 10 kg and the means necessary for their attachment to the tail cable ties;

h) hose clamp;

i) a device for creating pressure in order to obtain an internal pressure of 5 kPa;

j) Luggage temperature -10°C and +45°C.

4. Procedure

A. Test at room temperature (22°)

You should seal the ends of the small tubes using existing methods (for example, by heating the end caps, with the possibility of shrinking), and provide access pressure from one end portion. You need to drill a few holes in the smaller pipe at a distance of 350 mm from the end portion of the pipe. (See Fig).

You should center the smaller pipe inside the larger pipe size and seal the gap between the tubes through the use of existing methods (for example, using inflatable bags). You want to commit a smaller pipe into the larger pipe so that at least a length of 350 mm pipe of smaller size, together with drilled holes would act from a pipe of a larger size. (See Fig).

[It should be noted that the subassembly of the two pipes can be replaced by a single closed hollow mandrel, made with providing an appropriate transition is from a larger to a smaller area with suitable means for supplying pressure inside and at the respective output holes to bleed pressure].

You must have a gel coating over the area of transition between the two pipes. (See Fig). You should form a shank size of about 100 mm by gluing together the wrapped edges of the gel coating. (See Fig). You must put this shaft in half and secure it to the pipe of larger size with some vinyl tape. (See Fig). You should place a large hose clamp around the gel coating on the pipe of larger size to seal this end portion of the gel coating. (See Fig). If necessary, excess gel can be placed under the gel-coat and hose clamp to ensure there is no leakage through the tail section during the test.

Need to rent a cable link and post it free for the gathering of the overlay coating around the pipe of a smaller size at a distance of 150 mm from the pipe of a larger size so that to close some of the smaller tubes with holes drilled. (See Fig).

In order to eliminate any bleed pressure through the longitudinal seal along the sheet between the hose clamp and cable connection, a certain segment of the vinyl tape is wound around the gel coating on this site to prevent deployment of videopom is folded by the shank. (See Fig).

Should have end sections of the site so that friction is reduced to a minimum (for example, be supported on rollers), and screwed in smoothly selected load on the tail cable connection caution : in order to fully harmonize the applied load on the cable connection. You must leave a load suspended in 1 minute for tension ties (see Fig), and then remove the load, leaving the relationship cambiocorsa around the gathered section of the wrapper.

You should place the assembled node in a water bath, to connect the pipe with the pressure from the device for supplying pressure to the place of access pressure in the smaller pipe and applying internal air pressure of 5 kPa. The coating is considered to have passed the test if, during its immersion for 1 minute when the internal air pressure equal to 5 kPa, there are no bubbles coming out of the end portion of the shutter when the floor is gathered and tied around the pipes of a smaller size.

b. Test at a temperature of +45°

The order of operations is the same as specified above, except that the test gel sheet is aged for 4 hours at a temperature of 45°C. you Should run the test in a temperature chamber at a temperature of 45°at which the test sample is immersed in water is Anya with a temperature of 45° C.

C. Test at a temperature of -10°

The order of operations is the same as specified above, except that the test gel sheet is aged for 4 hours at a temperature of -10°C. you Must complete the test in a temperature chamber at a temperature of -10°at which the test sample is immersed in ice water with a temperature of 0°C.

5. Report

You should record the stretching force (N)applied to the cable connection and the necessary sealing Assembly when the inner pressure of 5 kPa. For the preferred gel coatings this tension force will be less than or equal to 265 H (27 kg) at three different temperatures tests.

Thus, the above test to maintain pressure serves as a method of selection of the preferred coatings having sufficient flexibility for easy installation in accordance with the present invention. Preferably, you should pick the coverage that have the ability to prevent bubbles at all temperatures trials -10 to +45°when a particular cable connection is stretched to the efforts of stretching, not exceeding in magnitude is equal to 265 H (27 kg), preferably not more than 235 N (24 kg), more preferably not more than the eating of 196 N (20 kgf), and especially not more than 147 N (15 kgf). Especially preferred are coatings that prevent the occurrence of bubbles at a temperature equal to 22°and when the force of the tension cable ties not more than 98 N (10 kgf).

The preferred support layers for use in coatings made in accordance with the present invention have a layered structure with a total thickness equal to about 81 microns, and contain the following consecutive layers: a layer of low density polyethylene with a thickness of 30 μm, a layer of polyethylenterephtalate thickness of 12 μm, a layer of aluminum foil having a thickness of 9 μm, a layer of low density polyethylene with a thickness of 30 μm.

The gel is melted, and they are covered with this layer in a known manner, preferably, to achieve an overall thickness equal to about (1,5±0,5) mm

Gels for use in accordance with the present invention can be any thermosetting or thermoplastic oleophilic polymer gels described in numerous patents, particularly those obtained by the companies of Raychem Corporation. Preferred are known thermoplastic three-block copolymer gels, examples of which include gels described in U.S. patent US-A-5541250(RK451) and US-A-5618882(RK469)received on behalf of the company Raychem and descriptions of which are included herein as reference material is.

Specialists in the art should understand that the present invention is not limited to the illustrated variants of its embodiment and that many additions and modifications are possible when implemented without deviating from the scope of the present invention as defined by the following further claims. The invention includes all capable of triggering combination of characteristics, previously described, regardless of whether specified or not specifically these combinations.

1. Flexible sheet coating, is able to fully wrap closure cable splices subject to seal independently of the heat, another external energy source or catalytic agent containing gel layer and a flexible support layer and the gel layer is separated from or deposited on the support layer, but such coverage when it wraps around the transition from the first cable to the second cable having a cross sectional area smaller than that of the previously mentioned first cable made flexible enough to collect manually in overlapping folds around the second cable with gel sealing cover.

2. Flexible floor according to claim 1, characterized in that it is made flexible enough to collect manually in overlapping folds around the second cable with the gel, platnuim their gate, when the diameter of the second cable at least 30% less than the diameter of the first cable.

3. Flexible floor according to claim 2, characterized in that it is made flexible enough to collect manually in overlapping folds around the second cable with gel, sealing their shutter, when the diameter of the second cable, at least 50% less than the diameter of the first cable.

4. Flexible floor according to claim 3, characterized in that it is made flexible enough to collect manually in overlapping folds around the second cable with gel, sealing their shutter, when the diameter of the second cable, at least essentially, is in the range of values that 60-70% less than the diameter of the first cable.

5. Flexible floor according to any one of the preceding paragraphs, characterized in that at least part of the surface of the gel layer facing away from the supporting layer applied substance to reduce adhesion.

6. Flexible floor according to claim 5, characterized in that the substance to reduce adhesion deposited on an elongated middle section of the gel layer adjacent to the two outer sections, on which the specified substance is not applied.

7. Flexible floor according to claim 5 or 6, characterized in that the substance to reduce the adhesion of the powder contains.

8. Flexible floor according to claim 7, characterized in that the powder contains powder hoist the A.

9. Flexible floor according to any one of pp.5-8, characterized in that the area (areas) of the said surface of the gel layer facing away from the support layer, on which a substance to reduce the adhesion is not caused imposed removed the covering layer.

10. Flexible floor according to claim 9, characterized in that it removed the covering layer contains at least one sheet of cover material.

11. The flexible coating of claim 10, wherein the specified at least one sheet of cover material contains paper.

12. Flexible floor according to any one of the preceding paragraphs, characterized in that the supporting layer contains polyethylene, preferably low density polyethylene.

13. Flexible cover 12, characterized in that the supporting layer contains a low-density polyethylene.

14. Flexible floor according to any one of the preceding paragraphs, characterized in that it further comprises a layer to prevent evaporation.

15. Flexible cover 14, characterized in that the layer to prevent evaporation placed on the surface of the support layer facing away from the gel layer.

16. Flexible cover 14 or 15, characterized in that the specified layer to prevent evaporation contains aluminum.

17. Flexible floor according to any one of the preceding paragraphs, characterized in that the outer is the first surface side, opposite the specified gel layer, placed a protective layer.

18. Flexible cover 17, characterized in that the protective layer contains a polyethylene terephthalate (PET) or polyethylene (LDPE) low density.

19. The shutter cable for splicing containing flexible coating according to any of the preceding paragraphs and wrapped around the specified cable splicing and around the cable sections smaller, adjacent to the splice, and the coating is assembled in overlapping folds around these cable sections so that the gel seals the breech.

20. The shutter according to claim 19, characterized in that it further comprises a tape wound around the wrapped cover to compress the gel inside the gate.

21. A method of creating a cable shutter surrounding cable splicing, involving stages:

wrap a flexible cover made according to any one of claims 1 to 20, around a cable splice so that the flexible cover is placed over the area of transition splicing;

picking up coverage in the overlapping folds around these areas of transition.

22. The method according to item 21, wherein the phase wraps also provides placement of the specified cover over parts of the cable (s) for a merger.

23. The method according to item 21 or 22, characterized in that article is Diya collection coverage in the overlapping folds around these areas of transition further comprises picking up coverage around these cable sections so to gel condensed the shutter.

24. The method according to any of PP-23, characterized in that it further provides for the stage of winding the tape around the superimposed coating for grip shutter cable.

25. The method according to paragraph 24, wherein the specified tape contains elastic plastic or rubber band.

26. The method according to paragraph 24 or 25, characterized in that the winding of the tape also protects the gathered folds of the coating, providing protection seal.

27. The method according to any of p-26, characterized in that the surface of the cable splicing level or turn in solid before applying flexible pavement.

28. The method according to item 27, wherein the surface of the cable splicing level or turn in solid before applying flexible pavement by applying tape and/or gasket.

29. The method according to p, wherein the gasket includes a plastic strip and/or has a flexible fingers.

30. The method according to any of PP-29, characterized in that the gel tape is wound around the cable or cables near the splice before applying flexible pavement.

31. The method according to any of PP-30, characterized in that the flexible cover is initially wrapped around the cable splice with the formation of the shell, having drawn up the hole, fill the hole with liquid means for incap is ulali, then the hole cover by subsequent folding.

32. The method according to p, characterized in that after the formation of the shell before putting funds to encapsulate around the end sections cover the wound sealing tape thus, in order to seal the shell relative to the cable or cables.

33. The kit of parts used in the creation of the shutter for cable splicing method according to any one of p-32 containing a flexible coating according to any one of claims 1 to 20, and an elastic plastic or rubber tape for winding wrapped around the coating operation.

34. The kit of parts according p, characterized in that it further comprises a gel strip for winding around the cable near the splice and/or pad having flexible fingers.

35. Flexible cover for closing cable splicing containing gel layer deposited on a support layer in which material to reduce adhesion caused, at least part of the surface of the gel layer facing away from the supporting layer.

36. Flexible cover for closing cable splicing containing gel layer and the reference layer on the surface of the support layer facing away from the gel layer by layer to prevent evaporation.

37. Flexible sheet coating for the formation of C is down around the cable splice or other object, regardless of the heat, another external source of energy or a catalytic agent containing gel layer and a flexible support layer and the gel layer is separated from the reference layer or a deposited layer by layer on the supporting layer, the said coating when it wraps around the transition from the first cable to the second cable having a reduced cross-sectional area, is made flexible enough to collect manually in overlapping folds around the second cable with gel, sealing their shutter, the shutter formed by the specified coating capable of preventing the leakage of gas inside it, when the internal pressure is 5 kPa, at temperatures in the range from -10 to +22 or +45°and the tension of the particular cable connection with the guarantee of fixing the specified cover to the specified first or second cable less than or equal to 265 N.

38. Flexible floor on clause 37, wherein the temperature is essentially equal to 22°and the tension of the cable connection is not more than 98 N.

The priority according to claims 1, 14-34 and 36 from 07.03.2000.

Priority pp.5-13 and 35 from 07.06.2000.

The priority according to claim 2 to 4, 37 and 38 of 07.03.2001.



 

Same patents:

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

The invention relates to underground pipelines and combined copper and optical cable and is designed to carry low-frequency branches conductive wires from the combined cable on his uncut construction length with additional low-frequency communication cable with copper conductors

The invention relates to the industrial areas in which you want to retrieve the method of shrink tubing mechanically strong, electrically insulating, corrosion protection or decorative coating of various objects, such as nodes join or terminations of cables, hydraulic pipes, etc

The invention relates to underground pipelines and composite cable including fiber optic cable and electrical cables and/or control

The invention relates to electrical engineering and allows smooth throws the strength of the electric field in the region of connection of the ends of the cables to reduce the complexity of the Assembly process while increasing the electric strength, durability and reliability

The invention relates to a casing that includes a clamping element for fastening together the two parts of the casing, in particular shutter for splicing cables, for example to accommodate telecommunication cables, in particular optical fiber cables or other cables

Cable clutch // 2183374
The invention relates to a cable coupler for armoured cables transmitting elements which are inside the Central pipe

The invention relates to a device for enclosing parts of the elongated objects, for example, electrical wire conductors, and to a material for sealing, preferably gel, protect these items from violations

The invention relates to the field of branching cable and methods of making the cable branches

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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