CN207765936U - A kind of anti-explosion box for cable middle connector - Google Patents

Abstract

The utility model proposes a kind of anti-explosion box for cable middle connector, the semi-cylindrical shell docked including two, flame retardant rubber sealing ring and pressing plate, the both ends of the semi-cylindrical shell are both provided with necking part, the necking part has the through-hole that current supply cable passes through, the necking part is internally provided with the seal groove being adapted with the flame retardant rubber sealing ring, the necking part of the close seal groove is internally provided with screens protrusion, the screens protrusion is for blocking the flame retardant rubber sealing ring, the end face of the necking part is provided with the fixed component being fixedly connected with the pressing plate, the pressing plate is fixed on the outside of the semi-cylindrical shell, the flame retardant rubber sealing ring is internally provided with several dovetail grooves.The armored cassette sealing performance is excellent, and service life is long, and fire-retardant uprising performance is good.

Description

A kind of anti-explosion box for cable middle connector

Technical field

The utility model belongs to explosion-protection equipment technical field, and in particular to a kind of anti-explosion box for cable middle connector.

Background technology

With the high speed development of national economy, power grid cables popularity is higher and higher, and more and more cables are concentrated To cable duct, cable shaft or the subsurface that is laid in side by side need one due to unit cable limited length on a usual circuit Or more connector carry out extension length.To meet power reguirements, it is well known that cable intermediate joint is that cable does weak ring Section.According to relevant statistics, in the past 20 years, cable fire more than 1140 times occurs for China, and 2005-2010 is unexpectedly up to 562 times, power plant Occur 2 times, cause directly or indirectly economic loss up to more than 50 hundred million yuan.According to power fault analysis, cable fire is caused to occur The reason is that cable mid head production quality is bad, crimp head is not tight, contact cable resistance is excessive, the made end mistake of long-term long journey Heat wears insulation, finally results in the generation of cable duct or direct-buried cable fire.Along with urban waterlogging by various acid-alkali salt corrosivity Liquid, which pours into cable duct well and generates burn into cable intermediate joint to cable intermediate joint, constructs under wet weather and has been mixed into aqueous vapor And other reasons, causing cable intermediate joint, it is easy to appear failures even to explode.And now, common cable is more in cable duct well, Some ditch wells are also possible to be flooded with the imflammable gas such as biogas, and cable connector once explodes, even a spark, may all ignite Entire ditch well, causes huge economic loss, or even raise cable duct manhole cover plate and damaged to pedestrian.Therefore, in the cable Between to install protection box on connector additional extremely necessary.

The protection of cable connector, it is necessary to be comprehensive, i.e., must have waterproof, anti-acid-alkali salt burn into explosion-proof, fire-retardant The features such as.Cable connector since individual big, length is long, explosive force is strong, for it makes protection box, and must to possess mouldability splendid Material and the high technique of precision, complete at this 2 points still has sizable research space at present, cable connector traditional at present Means of defence has two classes：The first kind be installed additional outside connector one with unload can hole fiberglass outer cover, then can hole handle by unloading Outer cover fills AB glue, and cable connector seal note completely after AB glue solidification and is wrapped up, to play waterproof and anti-acid-alkali salt corrodes Effect；Therefore mode is at all without antiknock ability, once exploding, explode generated energy, flame can only be led by unloading energy hole To being discharged in the comparatively safe space of cable duct well, due to cable duct well inclement condition and complex, this protection method There are huge unreliabilities.Second class is the buckle sandwich type element made of the SMC material of high intensity, is pressed and is connected by handware It connects, two ends are stifled using inorganic fire mudding, and are aided with the winding of waterproof self-tightening adhesive tape to solve waterproof problem, within a certain period of time The function of explosive-proof protector can be reached, but due to plugging material own physical performance reason, there are congenital for weatherability, durability Property defect, construction personnel is required high, is not easy to organizational standard and is turned into industry.However, existing cable protection of welded joints method is adopted Its sealing performance effect of protective cover is less desirable, and durability is also poor.

Invention content

The utility model proposes a kind of anti-explosion box for cable middle connector, and the armored cassette sealing performance is excellent, and service life is long, Fire-retardant uprising performance is good.

What the technical solution of the utility model was realized in：

A kind of anti-explosion box for cable middle connector, including two docking semi-cylindrical shell, flame retardant rubber sealing ring and The both ends of pressing plate, the semi-cylindrical shell are both provided with necking part, and the necking part has the through-hole that current supply cable passes through, described Necking part is internally provided with the seal groove being adapted with the flame retardant rubber sealing ring, close to the necking down of the seal groove Portion is internally provided with screens protrusion, and the screens protrusion is for blocking the flame retardant rubber sealing ring, the end of the necking part Face is provided with the fixed component being fixedly connected with the pressing plate, and the pressing plate is fixed on the outside of the semi-cylindrical shell, institute It states flame retardant rubber sealing ring and is internally provided with several dovetail grooves.

Preferably, the fixed component is the bolt hole being arranged on the end face of the necking part, the pressing plate and institute Necking part is stated to be fixedly connected by stainless steel bolt M8.

Preferably, the flame retardant rubber sealing ring includes inner seal ring and exterior seal ring, is provided in the exterior seal ring Internal thread groove, the outside of the inner seal ring be equipped with the matched external thread groove of the internal thread groove, in the inner seal ring Portion is equipped with several dovetail grooves.

Preferably, the semi-cylindrical shell is prepared by the forging and stamping one-pass molding of SMC composite materials.

The beneficial effects of the utility model：

The anti-explosion box for cable middle connector of the utility model its necking part has a through-hole that current supply cable passes through, necking part it is interior Portion is provided with the seal groove being adapted with flame retardant rubber sealing ring, and flame retardant rubber sealing ring is internally provided with several dovetail grooves, should The dovetail groove of several arrangements is adapted with cable and enhances flame retardant rubber sealing ring to the sealing effect of cable, extends cable Service life.According to the cable size at scene, monomer flame retardant rubber sealing ring or the flame retardant rubber sealing ring of combination (packet are selected Include inner seal ring and exterior seal ring), flame retardant rubber sealing ring has several dovetail grooves, can there is very strong retractility and anti-extrusion Property, pressing plate is then bolted on semi-cylindrical shell both ends, thus can constantly squeeze flame retardant rubber sealing ring It is allowed to reach sealing effect.

By the cable intermediate joint water proof fire retardant explosion proof applications of the utility model in 10KV cables, has the following advantages：⑴ Corrosion-resistant pollution-free, product can antiacid, alkali, salt, seawater, raw sewerage, corrosive ground or underground water and numerousization Learn the corrosion of fluid.With nontoxic, rustless, tasteless, to water quality non-secondary pollution and it is not necessarily to corrosion-resistant good characteristic.(2) antifouling Anti- moth, has used unsaturated polyester resin, so its clean surface is smooth, it will not be by the first shellfish in ocean or sewage, mushroom etc. Microorganism contamination moth is attached, so that increasing roughness, reduces the cross-section of river, increases maintenance cost.No these pollutions, are used for a long time clean It is net as before.(3) heat-resisting freeze proof, under -30 DEG C of states, still there is good toughness and high intensity, it can be at -50 DEG C to 80 DEG C In the range of be used for a long time, using special formulation resin can also 110 DEG C or more temperature work.(4) electric heating good insulating, The material has the characteristics that electrical insulating property, and insulation resistance most adapts to be used in transmission of electricity, telecommunication line is intensive in 1012-1015 Ω .cm Area, and excellent thermal insulation performance.(5) the capability of antidetonance is strong, uses high-strength composite material SMC forging and stamping one-pass molding, without weak spot, There are extremely strong explosion-proof capabilities.Accident occurs among cable and generates explosion time.High pressure draught, the flame and broken that explosion can be generated Piece is limited in armored cassette, avoids fault spread, prevents the generation of the secondary disaster.(6) fire retardancy is strong, product fire retardancy By force, reach A1 grades of high standard；It is also configured with high-performance thermal insulation layer in tray interior, when fire occurs for cable intermediate joint, this Product not only has superpower fire retardancy, while also assuring that shell will not rise substantially, to protect adjacent cable will not It is ruined.(7) there is the strong product of resistance to pressure very strong pressure-resistant performance, shell can bear from internal or external superpower impact. It prevents from rolling failure because of weight.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.

Fig. 1 is the explosive view of the anti-explosion box for cable middle connector of the utility model；

Fig. 2 is the structural schematic diagram of semi-cylindrical shell.

Attached drawing indicates：1- semi-cylindrical shells；2- necking parts；3- through-holes；4- seal grooves；5- screens protrusions；6- interior sealings Circle；7- exterior seal rings；8- pressing plates；9- fixed components.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

Referring to Fig.1 with Fig. 2, a kind of cable intermediate joint water proof fire retardant armored cassette, including two docking semi-cylindricals outside Shell 1, flame retardant rubber sealing ring and pressing plate 8, semi-cylindrical shell 1 are prepared by the forging and stamping one-pass molding of SMC composite materials.Half The both ends of cylindrical shell 1 are both provided with necking part 2, and necking part 2 has the through-hole 3 that current supply cable passes through, and the inside of necking part 2 is set It is equipped with the seal groove 4 being adapted with flame retardant rubber sealing ring, the end face of necking part 2 is provided with the fixation being fixedly connected with pressing plate 8 Component 9, pressing plate 8 are fixed on the outside of semi-cylindrical shell 1, and flame retardant rubber sealing ring is internally provided with several dovetail grooves.It is fire-retardant Rubber seal includes inner seal ring 6 and exterior seal ring 7, and internal thread groove, the outside of inner seal ring 6 are provided in exterior seal ring 7 Equipped with the matched external thread groove of internal thread groove, inner seal ring 6 is internally provided with several dovetail grooves.The inside of necking part 2 is close The position of seal groove 4 is provided with screens protrusion 5, and screens protrusion 5 is for blocking flame retardant rubber sealing ring.Fixed component 9 is setting Bolt hole on the end face of necking part 2, pressing plate 8 are bolted to connection with necking part 2.Bolt is stainless steel bolt, The specification of stainless steel bolt is M8.

Its explosion-proof necking part 2 of cable intermediate joint water proof fire retardant of the utility model has the through-hole 3 that current supply cable passes through, contracting Neck 2 is internally provided with the seal groove 4 being adapted with flame retardant rubber sealing ring, and flame retardant rubber sealing ring is internally provided with several Dovetail groove, the dovetail groove of several arrangements is adapted with cable enhances flame retardant rubber sealing ring to the sealing effect of cable, prolongs The service life of cable is grown.According to the cable size at scene, the fire-retardant rubber of monomer flame retardant rubber sealing ring or combination is selected Glue sealing ring (including inner seal ring 6 and exterior seal ring 7), flame retardant rubber sealing ring has several dovetail grooves, can have very strong Then pressing plate 8 is bolted on 1 both ends of semi-cylindrical shell, thus can constantly squeezed by retractility and anti-extrusion Pressure drag combustion rubber seal allows it to reach sealing effect.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection domain within.

Claims (4)

1. a kind of anti-explosion box for cable middle connector, which is characterized in that close including two the semi-cylindrical shells docked, flame retardant rubbers The both ends of seal and pressing plate, the semi-cylindrical shell are both provided with necking part, and there is the necking part current supply cable to pass through Through-hole, the necking part is internally provided with the seal groove being adapted with the flame retardant rubber sealing ring, close to the seal groove The necking part be internally provided with screens protrusion, the screens protrusion is described for blocking the flame retardant rubber sealing ring The end face of necking part is provided with the fixed component being fixedly connected with the pressing plate, and the pressing plate is fixed on the semi-cylindrical shell Outside, the flame retardant rubber sealing ring is internally provided with several dovetail grooves.

2. anti-explosion box for cable middle connector according to claim 1, which is characterized in that the fixed component is setting in institute The bolt hole above the end face of necking part is stated, the pressing plate is fixedly connected with the necking part by stainless steel bolt M8.

3. anti-explosion box for cable middle connector according to claim 2, which is characterized in that the flame retardant rubber sealing ring includes Inner seal ring and exterior seal ring, are provided with internal thread groove in the exterior seal ring, the outside of the inner seal ring be equipped with it is described The matched external thread groove of internal thread groove, the inner seal ring are internally provided with several dovetail grooves.

4. anti-explosion box for cable middle connector according to claim 2, which is characterized in that the semi-cylindrical shell is by SMC Composite material forging and stamping one-pass molding is prepared.