CN205646757U - Cable intermediate head protection device - Google Patents

Abstract

The utility model relates to a protective device for the intermediate joint of cables, which comprises a silicone rubber sleeve covering the joints of two cables. The outer periphery of the silicone rubber sleeve is covered with a closed shell, and the shell is filled with inert gas; the shell includes two hollow shells. body, one end of the two shells is tightly butted, and the other end of the two shells has a circular neck, and the cable is penetrated through the hole in the circular neck; one of the shell sides is provided with an air nozzle for pumping and inflating ; The gas nozzle is provided with a valve, and the periphery of the gas nozzle is provided with a protective cover, and the protective cover is hinged on the corresponding shell. The protective device for the cable intermediate joint has good sealing performance, and its inner cavity is filled with inert gas, which can effectively prevent accidents caused by sparks at the cable joint, and is safe and reliable.

Description

Cable middle joint protection device

technical field

The utility model relates to a protective device for a cable intermediate joint.

Background technique

Due to structural limitations, the explosion-proof box for the cable intermediate joint in the prior art has poor sealing performance and poor explosion-proof effect, cannot really achieve the effect of fire prevention, and has a high accident rate.

Utility model content

In view of this, the purpose of the utility model is to provide a novel structure and high safety cable intermediate joint protection device.

The utility model is realized by adopting the following scheme: a cable intermediate joint protection device, which includes a silicone rubber sleeve set on the two cable joints, a closed shell is set on the outer periphery of the silicone rubber sleeve, and the shell is filled with inert gas; the shell includes Two hollow shells, one end of the two shells is tightly butted and matched, and the other end of the two shells has a circular neck, and the cable is penetrated through the middle hole of the circular neck; one of the shells is provided with a An inflated gas nozzle; a valve is arranged on the gas nozzle, and a protective cover is buckled around the gas nozzle, and the protective cover is hinged on the corresponding housing.

Further, annular grooves are provided on the periphery of the middle holes of the two shells on the end faces of the circular constriction, the peripheral walls of the annular grooves are tapered, and a tapered sealing ring is arranged in the annular grooves.

Further, the outer circumference of the circular constriction of the housing is provided with external threads, and a screw sleeve is screwed on the end surface of the circular constriction. The lip of the sealing ring.

Further, the opposite ends of the two shells are provided with matching annular connecting plates, and bolt holes are evenly distributed on the annular connecting plates to facilitate locking and fixing the two shells through bolts and nuts; and between the matched end faces of the two shells A sealing ring is clamped.

Compared with the prior art, the utility model has the following beneficial effects: the cable intermediate joint protection device has good sealing performance, and at the same time, its inner cavity is filled with inert gas, which can effectively prevent accidents caused by sparks at the cable joint, and is safe and reliable.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail through specific embodiments and related drawings below.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is an enlarged schematic diagram of place I in Fig. 1;

Explanation of symbols in the figure: 1-cable, 2-silicon rubber sleeve, 3-housing, 4-round constriction, 5-gas nozzle, 6-valve, 7-protective cover, 8-ring groove, 9-cone Shaped sealing ring, 10-screw sleeve, 11-protruding ring, 12-connecting disc, 13-sealing ring.

detailed description

As shown in Figures 1 to 2, a cable intermediate joint protection device includes a silicone rubber sleeve 2 that is placed on the joints of two cables 1, and the outer periphery of the silicone rubber sleeve 2 is provided with a closed shell, and the shell is filled with inert gas; The shell includes two hollow shells 3, one end of the two shells 3 is tightly butted and matched, and the other end of the two shells has a circular neck 4, and the cable 1 is penetrated through the middle hole of the circular neck; one of the shells The side part is provided with an air nozzle 5 for pumping and inflating; the air nozzle 5 is provided with a valve 6, and the air in the shell is drawn out through the air nozzle by an air pump, and then filled with inert gas to make the inner cavity of the shell full of inert gas. Gas, has a good fireproof effect, and will not produce sparks at the cable joint.

In this embodiment, a protective cover 7 is provided on the periphery of the gas nozzle 5, and the protective cover 7 is hinged on the corresponding housing. The anti-slip cover 7 is provided to protect the gas nozzle, prevent the gas nozzle from being corroded, and facilitate subsequent maintenance.

In this embodiment, an annular groove 8 is provided on the periphery of the middle hole of the two shells 3 on the end faces of the circular constriction. The peripheral wall of the annular groove 8 is a tapered structure. Conical sealing ring 9 is arranged.

In this embodiment, the outer circumference of the circular constriction 4 of the housing 3 is provided with an external thread, and the end surface of the circular constriction is screwed with a screw sleeve 10, and the screw sleeve 10 is provided with a ring-shaped recess. In the groove 8 and against the convex ring 11 of the tapered sealing ring 9, when the screw sleeve 10 is locked, the convex ring 11 on the screw sleeve pushes the tapered sealing ring into the annular groove, and the cone on the outer periphery of the tapered sealing ring The shape surface and the peripheral wall of the annular groove are extruded and matched, so that the dense tapered sealing ring is in close contact with the outer peripheral surface of the cable, ensuring permanent radial force, ensuring no gap between the tapered sealing ring and the cable, and ensuring sealing.

In this embodiment, the opposite ends of the two housings are provided with matching ring-shaped connection plates 12, and bolt holes are evenly distributed on the ring-shaped connection plates to facilitate locking and fixing the two housings through bolts and nuts; and the two housings are matched. A sealing ring 13 is sandwiched between the end faces.

The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the utility model in detail. It should be understood that the above descriptions are only preferred embodiments of the utility model and are not intended to limit the utility model. For new models, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (4)

1. a cable intermediate joint protection device, it is characterised in that: including the silicone rubber sleeve being placed on two cable connector portions, described silicone rubber sleeve periphery is arranged with closure, envelope filled full noble gas；Described shell includes two hollow housings, and two housings wherein one end closed butt joint coordinates, and the two housings other end has circular necking down, and described cable is penetrated by circular necking down mesopore；One of them housing sidepiece is provided with the valve inflated of bleeding；Being provided with valve on described valve, valve periphery button is provided with protective cover, and described protective cover is articulated with in corresponding housing.

Cable intermediate joint protection device the most according to claim 1; it is characterized in that: the mesopore perimembranous being positioned at circular necking down end face on two housings is provided with annular groove; described annular groove perisporium is pyramidal structure, is provided with cone-shaped sealing ring in described annular groove.

Cable intermediate joint protection device the most according to claim 2; it is characterized in that: the circular necking down peripheral part of described housing is provided with external screw thread; it is connected with swivel nut on the end face of circular necking down, described swivel nut is provided with and stretches in annular groove and head on the bulge loop of cone-shaped sealing ring.

Cable intermediate joint protection device the most according to claim 1, it is characterised in that: two shell phase butt ends are provided with the circular coupling plate matched, and described circular coupling plate is evenly equipped with bolt hole and is locked by two shells in order to by bolt and nut；And it is folded with sealing ring between the end face that two housings matches.