Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G15/00—Cable fittings
  • H02G15/013—Sealing means for cable inlets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G15/00—Cable fittings
  • H02G15/02—Cable terminations
  • H02G15/04—Cable-end sealings

Definitions

• the invention relates to a sealing system of the type set out in the principal section of claim 1.
• casings, containers etc., more particularly cable sleeves, the internal space of which must be protected as durably as possible against environmental influences, especially dampness, with seals is familiar, at least where casing closing elements, such as doors and lids are present or where elements enter the casings, such as incoming and outgoing cables in the case of cable sleeves.
• casing closing elements such as doors and lids
• elements enter the casings such as incoming and outgoing cables in the case of cable sleeves.
• an insulating mass in excessive quantities to the cable input area, which generally as a result of two separate casing halves was designed separately, in order to ensure that during pressing together of the sleeve halves the insulating mass surrounds the incoming cable and completely seals it.
• the aim of the invention is to create a solution, which avoiding the disadvantages of the known solutions produces a sealing system which is simple to use and can take up the alternating loadings without problem.
• the seal is formed of a first element having an adhesive external surface and a springy or elastic second element.
• the sealing element which has an elastic or springy effect, it is possible to intercept or by ⁇ pass various expansion paths in temperature variations, while through the other, adhesive, element adhesion to the component surface is ensured which is allocated to the seal or the corresponding seal surface.
• the elasticity on the one hand and adhesiveness on the other also result in the seal being pressed into uneven areas, thus increasing the sealing effect even further.
• the springy and/or elastic element is completely surrounded by the first element with the adhesive surface.
• the complete surrounding of the elastic and/or springy elements means that the restoring forces can act in all directions.
• the invention also envisages that the springy element is formed by a mechanical spring, a pneumatic chamber or an elastomer.
• the invention also provides for a seal made of a cross-linked elastomer, more particularly an HTV silicon rubber.
• sealing materials such as non-cross-linked systems with very high viscosity and adhesiveness based on butyl rubber for instance.
• non-cross-linked systems with very high viscosity and adhesiveness based on butyl rubber for instance.
• the sealing effect is achieved not as a result of deformation, but due to the surface adhesion to neighbouring surfaces, such sealing material exhibiting a restoring capability.
• such sealing systems have the disadvantage that they cannot be used on components subject to great temperature variations and thus greater deformation paths.
• the invention provides for a seal , which is characterised by such incomplete cross-linking, that the surface has an adhesiveness, with such a seal having a peroxide quota lying under 1.0% by weight.
• the peroxide quota lies under 0.5% by weight, whereby in the case of a silicon rubber of type MVQ with various mixing ratios in peroxide cross-linking it has been shown that even with a peroxide quota of 0.2% there are adequate mechanical propertiess in various cases.
• the required restoring force was achieved as well as an adhesiveness which allows for adequate surface adhesion to the neighbouring surfaces bordering on the seal.
• chemical cross- linking is possible, but also physical cross-linking, e.g. through high-energy radiation.
• the invention also provides for the seal being formed of at least two differently cross-linked layers.
• the seal being formed of at least two differently cross-linked layers.
• at least one of the layers irrespective of the type of cross-linking, be it chemical or physical, can be completely cross-linked.
• Various layer structures can be realized here or half-shells and/or pot forms produced, whereby the half-shells or pot casings are formed of a completely cross-linked material with partially cross-linked sealing material inside, or vice-versa, the partially cross-linked sealing material is arranged on the outside and the fully cross-linked material inside.
• Fig. 1 a simplified spatial representation of a sealing system as described in the invention.
• Fig. 2 a cross-section through a sealing area with a sealing system shown in simplified form
• Fig. 3 a three-layer seal in the relaxed state
• Fig. 4 the seal shown in Fig. 3 in the compressed state.
• Fig. 7 a sealing system with a sealing body lying within it, in cross section.
• Fig. 8 a semi-cylindrical sealing system
• Fig. 9 a cylindrical sealing system in longitudinal section.
• the sealing system which is designated generally with 1 in the figures, comprises at least a first element 2 with an adhesive external surface 2a which is partially indicated in Figure 1 by dots, and a spring and/or elastic second element 3 which is shown symbolically in Figure 1 as a spring indicated by a broken line.
• the invention is not limited to the form of this sealing system which is shown.
• a closed, rotating ring can be just as possible here as angular cross section shapes and suchlike.
• a sealing system 1 ' is shown in section, consisting of a first enveloping element 2 ' which has the adhesive external surface, and an internal, e.g. pneumatic elastic second element 3'.
• the wall parts, e.g. a cable sleeve, are only indicated and designated with 9.
• a sealing system 1" is shown in Figures 3 and 4, whereby the inner elastic element 3" here is formed, e.g. by an elastomer, which is inserted between two sealing faces 2 ,/ and 4 respectively, which are characterised e.g. by an incomplete cross- linking such that their surface still has an adhesive property. Under compressive loading an image as shown in Figure 4 then results.
• a similar sealing system is shown in Figure 5, however provision can be made here for tensile loading according to the arrow 5, whereby the fully cross-linked elastic element 3'" is disposed between the partly cross-linked surfaces 2'" and 4' and adheres to these.
• FIGS 7 to 9 various embodiments of a seal are shown, for example in internal seal 7 can be taken up by a cross sectioned enveloping body, as shown in Figure 3, or as in Figure 4, where a half-shell enveloping body 6a itself can be formed of a completely cross-linked synthetic material or of other materials.
• Figure 9 shows a longitudinally sectioned sealing body with the material properties according to the invention.
• This sealing body is marked there with 3b, with an inner enveloped cable 8, for example cable bundles 8, if the seal is provided in the edge area of a cable sleeve, which is not shown here in more detail.
• the sealing material have a compression set of 20% or less (more preferably 15% or less), a Shore A hardness of 25% or less (more preferably 20%) or less, a brittleness temperature of - 40°C or less, a petroleum resistance of better than 15% after 24 hours at room temperature, and have fungi and bacteria resistance (preferably rated 1) and be resistant to termites and other damage.
• a compression set 20% or less (more preferably 15% or less), a Shore A hardness of 25% or less (more preferably 20%) or less, a brittleness temperature of - 40°C or less, a petroleum resistance of better than 15% after 24 hours at room temperature, and have fungi and bacteria resistance (preferably rated 1) and be resistant to termites and other damage.
• a resistant material such as a fluorosilicone rubber, a chloroprene rubber and /or a nitrile rubber.
• Such materials may be affixed to one or both elements of the system by any suitable fixing means, for example bonding, cross-Uii-king and/or vulcanizing. Also, or instead, such vulnerable surfaces may be protected by encasing the system in some rigid plastics shell or other part. One or more such parts may be provided to encase the system.

Landscapes

• Sealing Material Composition (AREA)
• Gasket Seals (AREA)
• Cable Accessories (AREA)
• Laminated Bodies (AREA)
• Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
• Installation Of Indoor Wiring (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6465255

Family Applications (1)

Country Status (16)

Cited By (1)

Families Citing this family (1)

Citations (4)

Family Cites Families (5)

• 1992
  • 1992-08-11 DE DE4226481A patent/DE4226481A1/de not_active Ceased
• 1993
  • 1993-08-10 MX MX9304855A patent/MX9304855A/es unknown
  • 1993-08-11 CA CA002140636A patent/CA2140636A1/en not_active Abandoned
  • 1993-08-11 WO PCT/GB1993/001705 patent/WO1994005065A1/en not_active Application Discontinuation
  • 1993-08-11 EP EP93918003A patent/EP0655171A1/en not_active Ceased
  • 1993-08-11 AU AU47247/93A patent/AU4724793A/en not_active Abandoned
  • 1993-08-11 NZ NZ254937A patent/NZ254937A/en unknown
  • 1993-08-11 KR KR1019950700461A patent/KR950703220A/ko not_active Application Discontinuation
  • 1993-08-11 CZ CZ95251A patent/CZ25195A3/cs unknown
  • 1993-08-11 JP JP6506005A patent/JPH07509836A/ja active Pending
  • 1993-08-11 SK SK143-95A patent/SK14395A3/sk unknown
  • 1993-08-11 BR BR9306879A patent/BR9306879A/pt not_active Application Discontinuation
  • 1993-08-11 HU HU9500411A patent/HUT70795A/hu unknown
  • 1993-08-11 PL PL93307173A patent/PL307173A1/xx unknown
• 1995
  • 1995-02-09 FI FI950573A patent/FI950573A/fi unknown
  • 1995-02-09 BG BG99414A patent/BG99414A/xx unknown

Patent Citations (4)

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