CN1132005A - sealing member - Google Patents

Abstract

A seal (6) for cable splices (1) is formed of a first element with an adhesive external surface (10) and springy and/or elastic second element, which can store energy to maintain the first element in contact with a surface to be sealed.

Description

Containment member

The present invention relates to a kind of sealing system, comprise the synthetic rubber of a kind of preferably bulk or strip or other seal, they are preferably used for the sealing cable junctions box.

People are familiar with preparation box, container etc., especially cable cover(ing) or other cable-joint protector box, and the inner space of these things should prevent the influence of surrounding environment as far as possible for a long time, especially can be moistureproof.Exist such example, such as box body have the parts of the usefulness of closing, such as Men Hegai; Perhaps under the situation of cable cover(ing), has the cable that enters.Known older solution is to be coated with adhesive with excessive insulation and so between two box bodys of opening in half minute of the porch of cable.When two half box bodys centered on the cable joint closure, just distortion around the cable that enters of adhesive formed a seal.This for example based on the existing problem of the adhesive of butyl rubber, be can creep under variations in temperature.Therefore, when different thermal expansion factors and different heat-conduction value between sealing surface and adhesive, occurring, consequently can leak.For fear of this class problem, just use a kind of heat-shrink sheath around the cable inlet, its just shrinks when heating, thereby closely seals cassette entry port and by its cable.A kind of PUR mixture is coated in can guarantee the bonding of necessity on the pyrocondensation sheath.Though this technology has very big advantage, one of its shortcoming is to tighten the flame of usually having to use for making it, so that often cause some on-the-spot local problems.

The objective of the invention is to overcome the problem of prior art, and propose a kind of seal especially, it uses simple and can adapt to because the power of the variation that the variation of temperature and pressure causes.

For this reason, the inventor has createed a kind of seal with special shape, it preferably have a kind of first module that has an adhesive outer surface and a kind of can storage power thereby can keep springy or flexible Unit second that keep in touch on a surface (as cable and/or a connector box) that first module and needs seal.

Therefore, a kind of seal through overmolding proposed by the invention possesses following one or more feature:

(a) mating surface of a kind of cable and/or sheath is processed to taper and/or truncated cone, thereby allows the cable of different size to be sealed in the sheath of given inlet size;

(b) a kind of seal has an outer surface that is roughly protrusion, such as circular (this term comprises semicircle or other part circular) or polygon, such as pentagon, hexagon, heptagon or octagon, like this, make the pressure (for example owing to power that has the sheath of seal to cause in its porch of sealing) that adds concentrate or gather on the cable in the seal; And

(c) seal comprises two parts, first and second partial cavities are wherein respectively arranged, such parts can align mutually with two first parts or two second parts and assemble, and two first game cavities determine that jointly one is different from the definite jointly size of two second game's cavities or the inlet of shape.

A gluing outer surface that is provided by first module (it can be to invest the coating of seal residual fraction or become integral body with coating) and elastomer or elastomeric Unit second preferably are provided seal, its energy storage power, thus first module and cable or connector box inlet etc. are kept in touch.This method permission appropriate cable connector box is owing to the harmomegathus of each parts that the change as temperature or air pressure causes changes.Thereby can keep gluing to various surfaces.On the one hand because elasticity on the other hand also because viscosity can cause seal to be pressed into irregular zone, and then increases the effect of sealing.

The degree of adhesivity will be selected according to concrete application target, and need not very high adhesivity.Can only be clamminess slightly in the surface, perhaps " moistening " surface that will seal only.In addition, can only when adding some pressure, just show adhesivity.However, the inventor wishes that desired adhesivity should be able to show at ambient temperature.

Because the preferred double properties of system, make it can be easy to adapt to separately purposes, no matter be according to size or the character of special material and geometrical property.Therefore, a kind of single design of seal just can be applied to different cable-joint protector boxes and different cable dimension.

Notice in the design that first module that springy and/or flexible Unit second is had adhesive surface fully surrounds substantially.Further coating or surface treatment can make seal can protect oil or other liquid.

Be surrounded by elastic force and/or flexible unit fully, mean that restoring force can act on all directions substantially.

The elastic force unit can comprise a kind of spring of machinery, a kind of air pressure cavity or a kind of synthetic rubber, can storage power by means of these.

Seal preferably includes a kind of crosslinked (cross-linked) synthetic rubber, a kind of ATV's of crying or other silicon rubber of more specifically saying so, and first and second unit can respectively comprise these materials, but has the crosslinked to produce the different characteristics that requires of different degree.

Various uses about these seals is well-known.Synthetic rubber and/or synthetic rubber often have very good characteristic, and thus, a kind of high temperature vulcanized silicon rubber as the MVQ type, often is applied in this respect.Crosslinked completely in order to reach a kind of like this material, the certain share and the silicate content of the peroxide by using original material just can obtain elastomeric various hardness.The inventor has been found that these materials are suitable as seal, because they can demonstrate low creep and low compression set.Therefore, mechanical deformation is highly reversible, thereby can keep sealing effectiveness in long-time.Common this deformability is measured according to German standard DIM53517.The residual volume that is to say pressure deformation is presented as a kind of scale calibration behind the juxtaposition metamorphose.

Except that crosslinked encapsulant, also has other encapsulant, such as non-crosslinked system based on very high viscosity of having of butyl rubber and adhesivity.With regard to these materials, the sealing effectiveness that obtained by distortion may be less, and obtainable sealing effectiveness is then bigger by with each adjacently situated surfaces surperficial gluing the time, and this class encapsulant shows a kind of ability of recovering former state.Such sealing system has such shortcoming, and promptly they are not too useful in the member that must stand very big variations in temperature.However, the seal with designing requirement that the present invention proposes still can be enough these not too preferable material produce effective result.

Further embodiment of the present invention proposes a kind of seal, and its characteristics are that it is by non-crosslinked fully a kind of adhesive that provides.A kind of like this seal preferably includes a kind of silicon rubber or other kind of synthetic rubber or other suitable material, and according to the weight of crosslinkable materials, it has the peroxide content of 1% or 1% following weight.

In a kind of so non-crosslinked fully elastomeric seal part, can guarantee enough restorable abilities on the one hand, and other direction can be attached to material on the surface by remaining adhesive.

The share of peroxide can fix on below 0.5% by weight more conveniently, for example, the silicon rubber of MVQ type with peroxide of various scopes can be crosslinked, and the inventor has pointed out, when a kind of peroxide quantitatively is 0.2%, the mechanical property that can obtain to meet the demands.Especially restoring force of Yao Qiuing and adhesive tension all can be obtained, and this power can make the neighbouring surface that has a common boundary with sealant that enough surface adhesion forces are arranged.

Be noted that in this not only chemical crosslinking is possible, and the crosslinked of physics also is possible (for example, passing through high-energy radiation).

An alternative embodiment of the invention is to provide two kinds of different cross-linked coatings that form at least to seal, according to said method, at least one of coating be chemistry or physics, and can be largely, preferably crosslinked completely, no matter and its crosslinked pattern how.

Here can realize various coating structures, or produce half shelly and/or other pattern, different coatings can obtain in various degree crosslinked.For example, a kind of encapsulant of partial cross-linking may be provided in the inside (for example, in order to sealing by its cable) of the seal of a hollow and/or its outside (in order to a connector box of the periphery that seals it).The core of sealing member material can be by crosslinked increasing its toughness largely, thereby reduce creep and can more ground storage power.

According to another embodiment of the present invention, be a kind of at least by two-layer contain to be connected to each other then pass through the formed seal of crosslinked crosslinkable materials again.This seal can be formed by at least two articulamentums with different peroxide contents, and total then synthetic passes through crosslinked again.Alternatively, seal also can and a kind ofly be made up of when the uncrosslinked second portion of fashion the first of a kind of time crosslinked (under-cross-linked), passes through common crosslinked after these two parts are connected to each other again.

Narrate the present invention in more detail by means of accompanying drawing below, wherein:

Fig. 1 represents a cable-joint protector box with seal of the present invention;

Fig. 2-7 represents various seal designs;

Fig. 8 represents several seals of sealing-in each other;

Fig. 9 represents a kind of connector box that has an additional encryption strip of paper used for sealing; With

The specific embodiment of Figure 10-14 expression sealing strip.

Fig. 1 represents a kind of cable-joint protector box 1 that is applicable to its joint of sealing between various model cable (not shown).Connector box 1 is made up of a pedestal or another kind of first parts 2 and a lid or another kind of second parts 3 (they are preferably formed by plastic mould pressing), and their available hinges etc. are engaged with each other together to form the space of sealing basically of an encirclement cable joint (not shown).Cable can be, for example, and multicore copper cable, coaxial cable or fiber optic cables.Thereby connector box can hold terminal bundle, public television antenna deconcentrator or plug or optical fiber splice, deconcentrator or marshalling dish (organisertray).Device 4 is to locate usefulness for joint bundle, deconcentrator or marshalling dish etc.For example, device 4 can comprise some guide rails, wherein can properly hold a folded plate.Connector box shows that every end has three inlets 5, and certainly, other structure also is fine.Each inlet can hold a seal 6 of the present invention and a strain remover 7, gets on so the stress on the cable is the contact that can not pass in seal 6 or the connector box.Seal 6 can be seen as the cable matching surface with truncated cone, thereby allows the cable of different size is sealed, and the inner surface of frustum presents rib-like, thereby gives its bigger flexibility.When between seal 6 that cable is showing and one second seal (not showing) when sealed, rib can be out of shape, and this second seal can be fixed on the lid 3 or be arranged on the position of above-mentioned seal 6.

The seal 6 of Fig. 1 is illustrated among Fig. 2 in more detail.Seal is a complete blocks in form, and its inside can contain one or more soft or sticking coatings 10, and preferably envelope is irritated or is embedded between the harder synthetic rubber layer 11.To be coated with gel, oil jelly or other suitable encapsulant with cable and/or the contacted blocks of connector box sheath surface, perhaps, such encapsulant can be just and seal be combined into integral body.At least at the separation plane place of blocks, soft coating or coating 10 are preferably expanded to exceed on hard formation or the coating 11, to guarantee hermetically-sealed cable well.This characteristics can provide under other model pattern not having, it be innovate independently and of great use.

Blocks shown in Figure 3 has been removed antetheca to appear cavity 4, and cavity 4 can be to fill with air also can provide the aeroelasticity restoring force to seal.Even such cavity is (as shown) of opening, also can help changing the rebound performance of blocks.

Fig. 4 shows that block body component 8,9 lumps together the outer surface that Shi Youyi protrudes, and is hexagon in the case, and like this, the extruding force that adds (as the arrow indication) is just concentrated or is gathered on the cable 15 wherein.This extruding force is produced by seal when closed from the pedestal 2 of the connector box shown in Fig. 1 and the inlet between the lid 35.Another coating of blocks parts 8,9 is preferably gluing, and the fuse 10 of each parts preferably has elasticity.

The seal of Fig. 5 comprises two parts 8,9, first cavity 16 and second cavity 17 are wherein respectively arranged, thereby can make these parts by two first game cavities 16 mutually alignment be assembled, as shown in the figure, or align mutually with two second game's cavities 17 and to be assembled.This just can form the inlet of different size from a pair of independent block parts.

Fig. 6 represents to have the sealing block of a mosaic block 18, removes the sealing that this mosaic block just can be used for the large scale cable.The remainder of each mosaic block 18 and sealing block can have aforesaid adhesive and synthetic rubber dual structure.

The seal of Fig. 7 is the hollow circular cylinder of an opening, and breach 20 wherein can be opened so that allow cable slide into from the side in the hole 21, and a kind of like this breach seal certainly has the general shape shown in Fig. 2 and Fig. 4 etc.

Three seals of expression are sealed mutually among Fig. 8.Each seal has a convex surface 22 and a concave surface 23, and like this, similarly seal just can couple together side by side with one concave surface 22 and another convex surface 21.

Figure 10-14 expression is applicable to the sealing strip 27 that centers on connector box periphery as shown in Figure 9.These seals can allow be added to sealing force that a connector box covers act on the cable 28 independently and pedestal 2 and lid 3 on.Sealing strip shown in preferably allowing is surrounded fully by the material of the pedestal of connector box or lid basically.Sealing strip 27 can comprise a kind of silicon rubber or other synthetic rubber, and can be crosslinked.Replaceable another kind of material is gel and adhesive.Can use adhesive and synthetic rubber dual structure, narrate when this is used for seal 6 in front.Sealing strip can have the fuse 29 of hollow, like this, to the required resilience force of small part be that pneumatically provides.A kind of soft material 30 is positioned at a side by a kind of relatively hard materials among Figure 12, its concrete applicable cases as shown in Figure 11, wherein sealing strip 27 nestles up an inclined-plane.Figure 13 A and 13B represent that sealing strip 27 is clipped in two kinds of methods in the groove in the top cover 3, and a harder fixedly fuse 31 is housed here, have different material 32 and 33 on its surface.Figure 14 A and 14B represent that a kind of sealing strip is in the situation before 2 pressurizations of the surface of a needs sealing.

Fig. 9 represents a connector box, and it has moveable latch member 24 to keep the closure of pedestal 2 and top cover 3.Lock bolt 24 can have a wedge-shaped impression, and by it, each wedge-shaped projection on pedestal and top cover each other can be afterburning in opposite directions, thereby seal (seal 6 for example of the present invention) is under the compressive state.Also can provide first parts that other method makes connector box and second parts stressed and be close to each other, thereby seal is under the compressive state.

Represented joint box-packed optical fiber marshalling dish 25 (can see three).Plate is installed on the hinge 26, can remove plate to appear wherein the optical fiber in any one dish by means of hinge.

The periphery of the pedestal 2 of connector box is centered on substantially by 27 of elongated sealing strips that extend, and when pedestal 2 and top cover 3 were closed each other, the sealing bar just formed seal between them.A kind of like this sealing strip 27 generally is to be contained on first parts and/or second parts of connector box, and can for example put in advance in the groove, perhaps can add when the erection joint box.When first parts of connector box and second parts closed up each other, sealing strip 27 was salable on seal 6.

A seal can also (perhaps be used another kind of method) and shape to have following one or more feature:

1. seal is made into bulk or strip substantially, and one or more skies are arranged The chamber, best, fill with air (or other gas), and preferably carry to seal For the aeroelasticity restoring force;

2. seal comprises the hollow circular cylinder of an opening; And

3. seal has a convex surface and a concave surface, thereby makes each similar Seal can with one of them convex surface and another concave surface engage and And put.

The present invention obviously makes for hermetically-sealed cable and other substrate provide various Type, structure, material, application and other design feature. Any or many Kind illustrated or graphic design all can exist and non-existent in other design Use in the situation, and in them any one or more all can be used for cable connector In the box, can be used for especially at least in the part of cable inlet.

Claims (15)

1. A seal having one or more of the following characteristics: (a) the mating surfaces of the cable and/or sheath are conical and/or frusto-conical, thereby allowing cables of different sizes to be sealed in a given inlet size sheath; (b) the seal has a generally convex outer surface, for example circular or polygonal, so that applied pressure is concentrated or focused on the cable within the seal; and (c) the seal comprises two parts, each having first and second partial cavities, so that the parts can be assembled with two first parts or two second parts aligned with each other, the two second parts A partial cavity jointly defines an inlet that is different in size or shape from that defined jointly by two second partial cavities. 2. A seal according to claim 1, characterized in that it has an adhesive outer surface provided by the first unit, and a second unit of resilient or synthetic rubber so as to maintain the first unit and the desired The sealed surfaces are in contact. 3. The seal as claimed in claim 2, characterized in that the resilient and/or elastic element is substantially completely surrounded by the first element having an adhesive surface. 4. A seal according to claim 2 or 3, characterized in that the resilient unit is formed by one or more mechanical springs, pneumatic cavities and synthetic rubber. 5. A seal according to any one of the preceding claims, characterized in that it comprises a cross-linked elastomer. 6. A seal according to claim 5, wherein the synthetic rubber is incompletely crosslinked so as to render its surface tacky. 7. The seal according to claim 6, characterized in that it is made by crosslinking a synthetic rubber with a peroxide in an amount of 1.0 based on the weight of the crosslinkable synthetic rubber. % or less than 1.0%. 8. A seal according to any one of the preceding claims, characterized in that it comprises a cross-linked silicone rubber. 9. A seal according to any one of the preceding claims, characterized in that it is obtained by combining at least two layers of uncrosslinked coatings (2 ", 3 ") containing crosslinking agents and then allowing the coating to Layers are formed by cross-linking. 10. A cable splice closure comprising a seal according to any preceding claim. 11. A cable splice enclosure according to claim 10, having first and second parts which can be assembled to form a substantially closed space to enclose the cable splice, when the first and second parts are assembled in When together, the seal is compressed. 12. A cable splice closure according to claim 10 or 11, wherein the seal is provided at the cable entry and has a sealing strip extending substantially around the periphery of the first part and/or the second part of the splice closure, These two parts come together to form a substantially closed space surrounding the joint. 13. A cable splice enclosure according to claim 12, wherein the sealing strip seals the seal at least when the first and second parts are brought together. 14. A seal having one or more of the following characteristics: (a) the seal is configured substantially in the form of a block or strip and has one or more cavities, preferably filled with air or other gas, to provide aeroelastic restoring forces to the seal; (b) the seal is an open hollow cylinder; and (c) The seal has a convex surface and a concave surface so that like seals can be juxtaposed with the concave surface of one engaging the convex surface of the other. 15. A seal according to claim 14 and any one of claims 1-13.

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