Fire-proof and explosion-proof composite structure at the cable joint of electric power system and its application method
A technology of cable joints and power systems, applied in the direction of cable joints, etc., can solve the problems of poor durability and low manufacturing cost, and achieve the effect of solving the effects of poor durability and reliability of fire resistance, low manufacturing cost, and reducing potential safety hazards
Active Publication Date: 2017-11-14
WUHAN HANYUAN JIJI ELECTRIC POWER EQUIP
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Problems solved by technology
[0006] Aiming at the defect of poor durability of the existing fire and explosion protection measures for the cable intermediate joints in the power system, the present invention proposes a fire and explosion-proof combination structure at the cable joint of the power system and its use method, which aims at the main cause of the cable burning. Basically, flame retardant and explosion-proof treatment is carried out on the cable joints, which can maintain reliable fire-proof and explosion-proof performance after long-term operation, significantly reduce the safety hazard caused by cable burning, and the manufacturing cost is low, which is conducive to widespread promotion
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[0049] In order to facilitate the understanding of the technical content of the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings.
[0050] like figure 1 The flameproof and explosion-proof structure shown at the intermediate joint of the cable includes an outer box body 1 formed by snapping together an upper half outer box 11 and a lower half outer box 12, an assembly end cover 2 connected to the left and right ports of the outer box body 1, and The insert plate 3 and the seal 4 are arranged on the assembly end cap 2 .
[0051] like figure 1 , image 3 As shown, the upper half outer box 11 and the lower half outer box 12 are provided with corresponding molding grooves, and axially extending flanges 10 are respectively provided on both sides of the transverse ports of the molding grooves. The groove here is like image 3 The setting shown is a semicircle. On the lower end surface of t...
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The invention discloses a fireproof explosion-proof combination structure at a power cable joint of an electric power system and an application method, belonging to the power cable connector fireproof explosion-proof combination structure. The fireproof explosion-proof combination structure at the power cable joint of the electric power system comprises an outer box body with double sealing structures on a longitudinal assembling surface, an assembling end cap which adopts an embedding sealing structure with the outer box body and a plugging board and a sealing member which seal a gap between related fitting surfaces of a cable annular surface and an assembling end cap, wherein the plugging board and the sealing member are arranged on the assembling end cap; the outer box is provided with a glue injection tube and an exhaust pipe are arranged on the outer box; the cable is fully wrapped by a power cable fireproof pack after connected to a middle connector and is arranged in the outer box; and fireproof sealing glue is injected to the outer box through the glue injection tube. In operation, air in the outer box is discharged through carbon dioxide or nitrogen and the fireproof sealing glue is injected inside the outer box and then high pressure shape forming is performed. The pressure maintaining shape forming is performed on the fireproof sealing glue by virtue of the outer box. The fireproof explosion-proof combination structure at the power cable joint realizes sealing protection on the cable connector, forms a compact filling layer on the periphery of the middle connector, solves a problem that durability and reliability of the fireproof performance are not good, and is low in manufacture cost and easy to promote.
Description
technical field [0001] The invention relates to the technical field of fire-proof and explosion-proof of intermediate joints of electric power system cables, in particular to a fire-proof and explosion-proof combined structure of electric power system cable joints and a use method thereof. Background technique [0002] With the continuous improvement of the degree of cableization of urban power lines, the cable failure rate is also rising. Operational experience has confirmed that more than 80% of cable failures are related to cable accessories, and the failure rate of cable intermediate joints is the highest in cable accessories. Due to the defects in the quality and installation process of the cable intermediate joint itself, once the cable intermediate joint explodes, it will often ignite the cable body, or even destroy the surrounding adjacent cables, causing huge losses to the power system. Therefore, the fireproof and explosion-proof measures for the cable intermediate...
Claims
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IPC IPC(8): H02G15/10
CPCH02G15/10
Inventor 钟明乐
Owner WUHAN HANYUAN JIJI ELECTRIC POWER EQUIP