Sealing element and the set of parts

 

(57) Abstract:

Sealing element, which may be helically wound around the elongated product, such as a cable that contains a strip of sealing material, such as gel, and at least one of a number of exciting elements, located next to the strip of sealing material and extending along the longitudinal edges of the sealing material. When using exciting elements provide adhesion of the sealing element with an elongated product, around which it is coiled. The sealing element can also include a carrier strip to which is attached a strip of sealing material and every a number of exciting elements. The technical result - increasing the effectiveness of the seal by fixing the seal material in the place of the elongated product. 2 C. and 20 C.p. f-crystals, 5 Il.

The invention relates to a sealing element, which may be helically wound around the elongated products (for example, television or electrical cable or pipe), for example, for the formation of a seal between the elongated product and the surrounding product (for example, casing splice cable or pipeline). the one or more of these sealing elements.

In the German patent N 4135570 C1 describes a sealing band for winding around the cable passing into the conduit, with the aim of creating a seal between the cable and the conduit in which at least the inner side of the belt facing the cable, has a rough surface, preferably made of elongated friction elements. The friction elements may represent a fine-grained corundum or emery, or they can be made of metal or plastic and secured in the material of the sealing belt.

In international patent application WO 94/05935 (Raychem) described sealing element, containing (a) a sealing material having a cone penetration in the range 80 - 400 (10-1mm) and the critical elongation of at least 100%, and (b) an elastomeric retaining element for sealing material.

In accordance with the present invention provides a sealing element, which may be helically wound around the elongated articles containing:

(a) a strip of sealing material; and

(b) a number of exciting elements, located next to the strip of sealing material and passing along its longitudinal edges, in which when using the th he coiled.

The sealing element according to this invention has the advantage that due to the fact that it has a number of exciting elements, located next to the strip of sealing material and extending along the longitudinal edges of the strips of sealing material, and is not inserted or mounted in the sealing material elements (as is the case in the seal belt on DE 4135570 C1), the effectiveness of the seal sealing material is usually not reduced due to the exciting parts.

The sealing element preferably further comprises a second number of exciting elements, located next to the strip of sealing material and passing along its longitudinal edge opposite the edge along which is mentioned a number of exciting elements. This creates the advantage that the sealing element engages with an elongated product, around which he wrapped both sides of the helically wound strips of sealing material, which contributes to the fixation of the sealing material in the place of the elongated product.

In preferred embodiments of this invention the sealing element further comprises a carrier preimushestvenno, the carrier strip may be a single piece of polymer, preferably an elastomeric material such as natural or synthetic rubber. Additionally or alternatively the carrier strip may contain a lot of fibers, filaments, wires, etc., in particular in the form of woven and non-woven material, made for example of polyamide, polyolefin, polyester, glass and/or metal.

The carrier strip, mainly, can be elastically extensible. This may have the advantage that the sealing material may be applied compressive force from the carrier strip, which is in the stretched state (i.e., such that it entailed opposing reduce the effort).

The carrier strip (and, preferably, also the sealing material together with a carrier strip) can mainly be pre-stretched in the longitudinal and/or transverse direction. Preferably, the consequence of this pre-stretch is a Supplement to the sealing material opposing reduce (and therefore the compressive) force. When using pre-stretched sealing element will typically seek to sunaudio materials, for example gels and pastes, usually function best when they are compressed. Particularly preferably, the sealing element has been pre-stretched in the longitudinal direction, so that it tends to shrink during use. Each attempt the reduction of the sealing element, preferably, substantially prevents that it is enclosed in the casing, tubing, etc. Under "pre-stretched" element refers to the element that spans at that time (or before), when it is wound around the elongated product. In some embodiments of the invention the carrier strip can even be pre-stretched to attach thereto the seal material.

Each gripping element from a number of exciting elements, preferably, independently attached to the carrier strip (if present). Additionally or alternatively, each gripping element is preferably attached to the carrier strip by mechanical coupling with it, for example, using one or more protrusions or other details on the exciting elements or carrier strip mating with one or more holes or uglublennim or more rows of holes or recesses, along the carrier strips which interlock exciting elements. In another especially preferred design, each gripping element is strengthened (e.g., compressed) in one or more filaments, fibers or wires of the carrier strip, for example, by means of a simple mechanical clutch.

Preferably, each gripping element has such a shape that, when the sealing element is spirally wound around the elongated products, exciting elements of successive coils attach to each other and, thus, in essence, prevents the displacement of the coils relative to each other in the axial direction along the elongated product. Additionally or alternatively exciting elements can be essentially located along the sealing element, at a sufficient distance from him, so that when the winding of the sealing element exciting elements of successive coils located between them. Exciting elements, preferably, provided with teeth or other spectacular ledges. Each gripping element can principally be performed, for example, of rigid plastics or metal.

In which W is in, which, when using at least contributes to the fixation of the sealing material on the sealing element in the axial direction relative to the elongated element around which the spiral wound sealing element. The locking means may contain exciting elements or may be a part of them. It is preferable, however, that the locking means (tools) contain one or more additional parts of the sealing element. Preferably, the locking means (means) is attached to the carrier strip (if present) or is one with it.

Mainly, the locking means may include a first fixing strip, passing near the longitudinal edge of the strip of sealing material. Preferably, the locking means further comprises a second locking strip, passing near the longitudinal edge of the strip of sealing material opposite, around which passes the first fixing strip. More preferably, the first and/or second fixing strip was located between the strip of sealing material and a number of exciting elements.

The locking means (or ka is alimango material. This has the advantage that, when the sealing element is wound around the elongated product and subjected to a compressive force (for example, when the casing splice cable or the sealing device is sealed around it), the locking means is preferably compressed and, due to its elasticity, preferably, has an opposing compressive force on the sealing material (which itself is, preferably, essentially incompressible). Some sealing materials (especially gels, as described in detail below) are best under pressure. However, such sealing materials are subject to creep or relaxation after a while, and/or they may change in volume due to, for example, temperature fluctuations. The advantage Abrosimova fixing means is that, if the use is such a creep, relaxation, or increase or decrease of the volume of sealing material, the locking means being compressed, will reply automatically to either expand due to its elasticity, or to decline further due to its compressibility (depending on circumstances), support), preferably, made of a polymer (for example, silicone, polyolefin, polyurethane) foam material and/or elastomeric material (for example, natural or synthetic rubber). The material of the fixing means preferably has a residual deformation under compression (determined in accordance with ASTM D395 at 70oC) not more than 15%, more preferably not more than 10% and especially preferably not more than 5%.

The most preferred variants of the invention, i.e. containing a strip of sealing material, a number of exciting elements, locking means for sealing material and the carrier strip, have the advantage that they combine the following four characteristics: seal, capture, fixing the sealing material and the accumulation of potential energy (e.g., via uprugosti.moloko locking means at its compression, or by programtime carrier strip when it is tensile), which can maintain the pressure on the sealing material. The fact that the preferred variants of the invention combine all these features in a single product (sealing element) means that additional elements that are commonly used for both the blanching, seal piping, etc.

The sealing material of the sealing element may generally include any suitable sealing material. One preferred form of the sealing material contains a resin, most preferably having a high residual strain in compression and the minimum creep properties. Preferably, the resin contains one or more, mainly non-crystalline materials, such as bituminous materials, elastomeric materials and/or thermoplastic polymers. Mastic may include one or more fillers or other additives. Examples of waxes that can usually be used in the sealing material according to this invention, is presented in U.S. patent N 3243211, 3297819, 3396460 and 4206786. Full disclosure of each of these patents are listed here for information. The advantage of mastic is that during the formation of the seal it is usually deformed and can easily spread, but after a while it becomes usually solid and can have a high mechanical strength. Preferably, the resin has a softening point (measured in accordance with ASTM E28) of about 130oC and when tested for peel rotations is lo 130 N/25 mm The preferred resin has a shear strength (when tested according to ISO 04587) more than 160 N, and preferably more than 250 N, Mastic preferred for this invention are high, as a rule, 100% residual deformation under compression.

Particularly preferably, the sealing material could additionally or alternatively contain gel. The gel may, for example, contain silicone gel, gel urea, urethane gel, thermoplastic gel, or any suitable gel or glodny sealing material. Preferred gels containing polymer composition with the oil filler. Preferably, the gel has a hardness at room temperature, in accordance with the definition using the analyzer patterns of Stevens-Volland, more than 45 g, preferably more than 50 g, particularly preferably more than 55 g, for example, 55 - 60, It preferably has a stress relaxation of less than 12%, more preferably less than 10%, and especially preferably less than 8%. Critical elongation, also at room temperature, is preferably more than 100%, more preferably more than 600%, even more preferably more than 1000%, and most preferably more than 1400%, in accordance with op is preferably at least to 2.2 MPa. In the General case, the residual strain in compression (measured in accordance with ASTM D395 at 70o) is, preferably, less than 35%, more preferably less than 25%, particularly preferably less than 15%. Preferably, the gel has a cone penetration, measured in accordance with ASTM D217 at least 50 (10-1mm), more preferably at least 100 (10-1mm), even more preferably at least 200 (10-1mm), and preferably not more than 400 (10-1mm), particularly preferably not more than 350 (10-1mm). Polymer gel composition may, for example, contain an elastomer or block copolymers having a relatively hard blocks and relatively elastomeric blocks. Examples of such copolymers can be block copolymers of styrene and a diene, such as butadiene or isoprene-styrene diblock or triblocaltara, for example, such as described in international patent publication WO 88/00603. Preferably, however, the polymer composition comprises one or more styrene-ethylene-propylene-styrene block copolymers, such as what sells Kuraray of Japan under the trademark 'Septon'. Liquid fillers used in the gel, preferably, contain oil. These m and, for example polybutadiene or polipropilenovye oils, and mixtures thereof. The preferred oils are a mixture of non-aromatic waxes and oils of naphthenic hydrocarbons. The gel may contain additives, such as moist collectors (e.g., benzoyl chloride), antioxidants, pigments and fungicides.

Gels are preferred, because they are often excellent sealing material, partly due to its ability to moisten the surface with which they come in contact, and partly due to their different physical and chemical properties. However, some or all of the preferred properties of the gel may be present in other uplatniteli materials in addition to gel. One such preferred properties of the sealing material is that it has a hardness Stevens-Follando in the range of 45 - 50 g, more preferably 50 to 70, Another preferred property of the sealing material is that it has a cone penetration, measured in accordance with ASTM D2171 at least 50 (10-1mm), more preferably at least 100 (10-1mm), even more preferably at least 200 (10-1mm) and preferably not more than 400 (10-1mm), persons who have in themselves the polymer (for example, silicon) foam materials, elastomeric materials such as natural or synthetic rubber, adhesives, particularly adhesives, bonding with pressure, hardening/reactive sealing material or grease, such as silicone grease.

As indicated above, in addition to the sealing element, the invention also relates to a set of parts to form a coating of the cable splice. Thus, in accordance with a third aspect of the invention, it provides a set of components for the formation of a coating of the cable splice, comprising: (a) one (or more) of the sealing element according to the present invention; and (b) a casing for the conclusion of splice cable and, preferably, also specified the sealing element (or each of these elements), helically wound around one (or more) broshennyh cables.

Preferably, when using this (or each) of the sealing element is wound around one (or more) cable and/or placed between two or more cables (in the latter case, for the education branch, for example), and the cover closes around the cable (s) and sealing element (elements). Mostly, when you close to sestultima compression sealing material and/or fixing means (if present), and/or the capture cable (cables) spectacular items (if present).

Hereinafter the invention will be described with reference to the following accompanying drawings:

Fig. 1 is a perspective view of one preferred variant of the sealing element according to this invention;

Fig. 2 is a cross-section of the sealing element according to Fig. 1;

Fig. 3 is a schematic cross-section of part of the cover splice cable made up of a set according to this invention and installed around a cable splice;

Fig. 4 is a perspective view of the carrier strip another preferred variant of the sealing element according to this invention; and

Fig. 5 is a perspective view of the entire sealing element, the carrier strip which is shown in Fig. 4.

In Fig. 1 and 2 shows the sealing element 1 according to this invention, containing a strip of sealing material 3 (e.g., gel) and two series of exciting elements 5 located next to the strip of sealing material 3 and passing along the opposite longitudinal edges 7 of this strip. As the strip of sealing material 3, the La (for example, rubber). Between the strip of sealing material 3 and each next exciting elements 5 is the locking means in the form of the locking strips 11 that fixes the sealing material 3 in a transverse direction with respect to the strip (i.e., in the axial direction with respect to the cable or other elongated element around which the strip may be wound). Each locking strip 11 is an integral part of the carrier strip 9, but this is not mandatory. Each locking strip 11 is oppositely and, as shown in the drawings also has additional oppositely layer 21, for example made of rubber or polymeric foam material.

The length of the supporting strips 9, near its opposite edges are the rows of holes 13, in which or some of which are part of the respective exciting elements 5, so that the exciting element mechanically meshed with the carrier strip 9. Each gripping element has teeth or other exciting protrusions 15, facilitating the capture cable or other elongated articles. Each gripping element has grips on their opposite povarennykh turns meshed with each other, so in essence preventing accidental shifting of the coils relative to each other in the axial direction along the elongated product.

In Fig. 3 schematically shows a cross-section of the housing 23 of the cover splice cable installed around the cable 25 and having a sealing element 1 according to Fig. 1 and 2, is wound around the cable. For greater clarity, shows only one coil of the sealing element 1, but normally sealing element is wound around a cable is two or more times. The arrow shows that the casing 23 is sealed around the cable 25 and the sealing element 1, resulting in compression of the strips 3 sealing material of the sealing element. The locking strips 11 of the sealing element will be compressed due to a certain stretch in the axial direction of the sealing material 3, due to its compression in the radial direction, but they will be, however in fact fix the sealing material in the axial directions. As described above, due to the fact that the locking strips 11 are elastic, any stretching or contraction of the sealing material 3 will usually be offset by a corresponding reduction or elongation Phi is e which sealing element is attached to the cable, as well as casing made with the possibility of coupling with a sealing element, the cable will be thus bonded to the shell.

In Fig. 4 shows a perspective view of the carrier strip of another embodiment of a sealing element according to the present invention. This carrier strip contains a loose weave elastomeric fibers 27 vpletennymi longitudinal reinforcing elements 29. Elastomeric fibers are preferably made of polybutadiene, and the reinforcing elements preferably contain polyamide, polypropylene, polyethylene, polyester, or fiberglass, or metal (aluminum or copper) wire.

In Fig. 5 shows a perspective view of the entire sealing element, the carrier strip which is shown in Fig. 4. This sealing element includes a strip of sealing material 3 (e.g., gel), which bear some of elastomeric fibers 27 of the carrier strips. The sealing material 3 can mainly be extruded on elastomeric fiber 27. Along each longitudinal edge of the strip of sealing material 3 passes the locking strip 31, preferably made of penopolimer (e.g., polyethylene). Each fiksirovat side of the sealing material 3, there is a number of exciting elements 33. Exciting elements 33 are installed (for example, by clamping) on the reinforcing elements 29. For additional attachment portion 35 of each gripping element is also included in the groove 37 in the corresponding locking strip 31.

1. Sealing element made with the possibility of a spiral winding around the elongated product and containing a strip of sealing material, characterized in that it contains a number of exciting elements, located next to the strip of sealing material and passing along its longitudinal edges to attach the sealing element by means of exciting elements to the elongated product, around which it is coiled.

2. Sealing element under item 1, characterized in that it further comprises a second number of exciting elements, located next to the strip of sealing material and passing along its longitudinal edge opposite the edge along which the first number of exciting elements.

3. Sealing element under item 1 or 2, characterized in that it further comprises a carrier strip to which is attached a strip seal is characterized in that that the carrier strip is made elastically extensible.

5. The sealing element according to p. 4, characterized in that the carrier strip is pre-stretched in the longitudinal and/or transverse direction.

6. Sealing element according to any one of paragraphs.3 to 5, characterized in that the carrier strip contains one segment of a polymer, preferably elastomeric, material.

7. Sealing element according to any one of paragraphs.3 to 5, characterized in that the carrier strip includes a woven or non-woven material.

8. Sealing element according to any one of paragraphs.3 to 7, characterized in that each gripping element number of independently attached to the carrier strip.

9. Sealing element according to any one of paragraphs.3 to 8, characterized in that each gripping element number attached to the carrier strip by means of mechanical coupling with it.

10. Sealing element according to any one of paragraphs.3 to 9, characterized in that each gripping element of the series is made to provide the opportunity clutch of exciting elements of successive coils to each other by the spiral wound sealing element around the elongated product to prevent accidental displacement of the turns of any of paragraphs.1 - 10, characterized in that each gripping element is made of hard plastic or metal.

12. Sealing element according to any one of the preceding paragraphs, characterized in that it further comprises a locking tool or tools that facilitate using at least fixing the sealing material on the sealing element in the axial direction relative to the elongated product around which the spiral wound sealing element.

13. The sealing element according to p. 12, characterized in that the securing means includes the first fixing strip, passing near the longitudinal edge of the strip of sealing material.

14. The sealing element according to p. 13, characterized in that the securing means further comprises a second locking strip, passing near the longitudinal edge of the strip of sealing material, the opposite edge, next to which is held the first fixing strip.

15. The sealing element according to p. 14, characterized in that the first and/or second fixing strip is located between the strip of sealing material and a number of exciting elements.

16. The sealing element according to p. 13, otlichilasj elements.

17. Sealing element according to any one of paragraphs.12 to 16, characterized in that the securing means or tools made elastically compressible.

18. Sealing element under item 17, characterized in that the securing means or tools contain an elastomer and/or polymer foam material.

19. Sealing element according to any one of paragraphs.12 to 18, characterized in that the securing means or tools are an integral part of the carrier strips.

20. Sealing element according to any one of the preceding paragraphs, wherein the sealing material contains a gel, paste and/or an adhesive, preferably an adhesive, bonding with pressure.

21. Sealing element according to any one of the preceding paragraphs, characterized in that the sealing material has a hardness Stevens-Follando 45 - year 130

22. Set details for education cover splice cable containing one or more sealing elements, characterized in that it contains a casing for the conclusion of splice cable, and these sealing elements made according to any one of the preceding paragraphs.

 

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